diff --git a/dist/leaflet.minichart.js b/dist/leaflet.minichart.js index c60c237..962282d 100644 --- a/dist/leaflet.minichart.js +++ b/dist/leaflet.minichart.js @@ -1,12 +1,12 @@ (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o b ? 1 : a >= b ? 0 : NaN; @@ -48,6 +48,24 @@ var ascendingBisect = bisector(ascending); var bisectRight = ascendingBisect.right; var bisectLeft = ascendingBisect.left; +var pairs = function(array, f) { + if (f == null) f = pair; + var i = 0, n = array.length - 1, p = array[0], pairs = new Array(n < 0 ? 0 : n); + while (i < n) pairs[i] = f(p, p = array[++i]); + return pairs; +}; + +function pair(a, b) { + return [a, b]; +} + +var cross = function(a, b, f) { + var na = a.length, nb = b.length, c = new Array(na * nb), ia, ib, ic, va; + if (f == null) f = pair; + for (ia = ic = 0; ia < na; ++ia) for (va = a[ia], ib = 0; ib < nb; ++ib, ++ic) c[ic] = f(va, b[ib]); + return c; +}; + var descending = function(a, b) { return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN; }; @@ -124,7 +142,7 @@ var array = Array.prototype; var slice = array.slice; var map = array.map; -var constant$1 = function(x) { +var constant = function(x) { return function() { return x; }; @@ -134,7 +152,7 @@ var identity = function(x) { return x; }; -var range = function(start, stop, step) { +var sequence = function(start, stop, step) { start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step; var i = -1, @@ -154,7 +172,7 @@ var e2 = Math.sqrt(2); var ticks = function(start, stop, count) { var step = tickStep(start, stop, count); - return range( + return sequence( Math.ceil(start / step) * step, Math.floor(stop / step) * step + step / 2, // inclusive step @@ -225,15 +243,15 @@ var histogram = function() { } histogram.value = function(_) { - return arguments.length ? (value = typeof _ === "function" ? _ : constant$1(_), histogram) : value; + return arguments.length ? (value = typeof _ === "function" ? _ : constant(_), histogram) : value; }; histogram.domain = function(_) { - return arguments.length ? (domain = typeof _ === "function" ? _ : constant$1([_[0], _[1]]), histogram) : domain; + return arguments.length ? (domain = typeof _ === "function" ? _ : constant([_[0], _[1]]), histogram) : domain; }; histogram.thresholds = function(_) { - return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant$1(slice.call(_)) : constant$1(_), histogram) : threshold; + return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant(slice.call(_)) : constant(_), histogram) : threshold; }; return histogram; @@ -356,12 +374,6 @@ var min = function(array, f) { return a; }; -var pairs = function(array) { - var i = 0, n = array.length - 1, p = array[0], pairs = new Array(n < 0 ? 0 : n); - while (i < n) pairs[i] = [p, p = array[++i]]; - return pairs; -}; - var permute = function(array, indexes) { var i = indexes.length, permutes = new Array(i); while (i--) permutes[i] = array[indexes[i]]; @@ -433,8578 +445,9012 @@ var zip = function() { return transpose(arguments); }; -var prefix = "$"; - -function Map() {} +var slice$1 = Array.prototype.slice; -Map.prototype = map$1.prototype = { - constructor: Map, - has: function(key) { - return (prefix + key) in this; - }, - get: function(key) { - return this[prefix + key]; - }, - set: function(key, value) { - this[prefix + key] = value; - return this; - }, - remove: function(key) { - var property = prefix + key; - return property in this && delete this[property]; - }, - clear: function() { - for (var property in this) if (property[0] === prefix) delete this[property]; - }, - keys: function() { - var keys = []; - for (var property in this) if (property[0] === prefix) keys.push(property.slice(1)); - return keys; - }, - values: function() { - var values = []; - for (var property in this) if (property[0] === prefix) values.push(this[property]); - return values; - }, - entries: function() { - var entries = []; - for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]}); - return entries; - }, - size: function() { - var size = 0; - for (var property in this) if (property[0] === prefix) ++size; - return size; - }, - empty: function() { - for (var property in this) if (property[0] === prefix) return false; - return true; - }, - each: function(f) { - for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this); - } +var identity$1 = function(x) { + return x; }; -function map$1(object, f) { - var map = new Map; - - // Copy constructor. - if (object instanceof Map) object.each(function(value, key) { map.set(key, value); }); - - // Index array by numeric index or specified key function. - else if (Array.isArray(object)) { - var i = -1, - n = object.length, - o; - - if (f == null) while (++i < n) map.set(i, object[i]); - else while (++i < n) map.set(f(o = object[i], i, object), o); - } +var top = 1; +var right = 2; +var bottom = 3; +var left = 4; +var epsilon = 1e-6; - // Convert object to map. - else if (object) for (var key in object) map.set(key, object[key]); +function translateX(x) { + return "translate(" + x + ",0)"; +} - return map; +function translateY(y) { + return "translate(0," + y + ")"; } -var nest = function() { - var keys = [], - sortKeys = [], - sortValues, - rollup, - nest; +function center(scale) { + var offset = scale.bandwidth() / 2; + if (scale.round()) offset = Math.round(offset); + return function(d) { + return scale(d) + offset; + }; +} - function apply(array, depth, createResult, setResult) { - if (depth >= keys.length) return rollup != null - ? rollup(array) : (sortValues != null - ? array.sort(sortValues) - : array); +function entering() { + return !this.__axis; +} - var i = -1, - n = array.length, - key = keys[depth++], - keyValue, - value, - valuesByKey = map$1(), - values, - result = createResult(); +function axis(orient, scale) { + var tickArguments = [], + tickValues = null, + tickFormat = null, + tickSizeInner = 6, + tickSizeOuter = 6, + tickPadding = 3, + k = orient === top || orient === left ? -1 : 1, + x, y = orient === left || orient === right ? (x = "x", "y") : (x = "y", "x"), + transform = orient === top || orient === bottom ? translateX : translateY; - while (++i < n) { - if (values = valuesByKey.get(keyValue = key(value = array[i]) + "")) { - values.push(value); - } else { - valuesByKey.set(keyValue, [value]); - } - } + function axis(context) { + var values = tickValues == null ? (scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain()) : tickValues, + format = tickFormat == null ? (scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity$1) : tickFormat, + spacing = Math.max(tickSizeInner, 0) + tickPadding, + range = scale.range(), + range0 = range[0] + 0.5, + range1 = range[range.length - 1] + 0.5, + position = (scale.bandwidth ? center : identity$1)(scale.copy()), + selection = context.selection ? context.selection() : context, + path = selection.selectAll(".domain").data([null]), + tick = selection.selectAll(".tick").data(values, scale).order(), + tickExit = tick.exit(), + tickEnter = tick.enter().append("g").attr("class", "tick"), + line = tick.select("line"), + text = tick.select("text"); - valuesByKey.each(function(values, key) { - setResult(result, key, apply(values, depth, createResult, setResult)); - }); + path = path.merge(path.enter().insert("path", ".tick") + .attr("class", "domain") + .attr("stroke", "#000")); - return result; - } + tick = tick.merge(tickEnter); - function entries(map, depth) { - if (++depth > keys.length) return map; - var array, sortKey = sortKeys[depth - 1]; - if (rollup != null && depth >= keys.length) array = map.entries(); - else array = [], map.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); }); - return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array; - } + line = line.merge(tickEnter.append("line") + .attr("stroke", "#000") + .attr(x + "2", k * tickSizeInner) + .attr(y + "1", 0.5) + .attr(y + "2", 0.5)); - return nest = { - object: function(array) { return apply(array, 0, createObject, setObject); }, - map: function(array) { return apply(array, 0, createMap, setMap); }, - entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); }, - key: function(d) { keys.push(d); return nest; }, - sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; }, - sortValues: function(order) { sortValues = order; return nest; }, - rollup: function(f) { rollup = f; return nest; } - }; -}; + text = text.merge(tickEnter.append("text") + .attr("fill", "#000") + .attr(x, k * spacing) + .attr(y, 0.5) + .attr("dy", orient === top ? "0em" : orient === bottom ? "0.71em" : "0.32em")); -function createObject() { - return {}; -} + if (context !== selection) { + path = path.transition(context); + tick = tick.transition(context); + line = line.transition(context); + text = text.transition(context); -function setObject(object, key, value) { - object[key] = value; -} + tickExit = tickExit.transition(context) + .attr("opacity", epsilon) + .attr("transform", function(d) { return isFinite(d = position(d)) ? transform(d) : this.getAttribute("transform"); }); -function createMap() { - return map$1(); -} + tickEnter + .attr("opacity", epsilon) + .attr("transform", function(d) { var p = this.parentNode.__axis; return transform(p && isFinite(p = p(d)) ? p : position(d)); }); + } -function setMap(map, key, value) { - map.set(key, value); -} + tickExit.remove(); -function Set() {} + path + .attr("d", orient === left || orient == right + ? "M" + k * tickSizeOuter + "," + range0 + "H0.5V" + range1 + "H" + k * tickSizeOuter + : "M" + range0 + "," + k * tickSizeOuter + "V0.5H" + range1 + "V" + k * tickSizeOuter); -var proto = map$1.prototype; + tick + .attr("opacity", 1) + .attr("transform", function(d) { return transform(position(d)); }); -Set.prototype = set.prototype = { - constructor: Set, - has: proto.has, - add: function(value) { - value += ""; - this[prefix + value] = value; - return this; - }, - remove: proto.remove, - clear: proto.clear, - values: proto.keys, - size: proto.size, - empty: proto.empty, - each: proto.each -}; + line + .attr(x + "2", k * tickSizeInner); -function set(object, f) { - var set = new Set; + text + .attr(x, k * spacing) + .text(format); - // Copy constructor. - if (object instanceof Set) object.each(function(value) { set.add(value); }); + selection.filter(entering) + .attr("fill", "none") + .attr("font-size", 10) + .attr("font-family", "sans-serif") + .attr("text-anchor", orient === right ? "start" : orient === left ? "end" : "middle"); - // Otherwise, assume it’s an array. - else if (object) { - var i = -1, n = object.length; - if (f == null) while (++i < n) set.add(object[i]); - else while (++i < n) set.add(f(object[i], i, object)); + selection + .each(function() { this.__axis = position; }); } - return set; -} + axis.scale = function(_) { + return arguments.length ? (scale = _, axis) : scale; + }; -var keys = function(map) { - var keys = []; - for (var key in map) keys.push(key); - return keys; -}; + axis.ticks = function() { + return tickArguments = slice$1.call(arguments), axis; + }; -var values = function(map) { - var values = []; - for (var key in map) values.push(map[key]); - return values; -}; - -var entries = function(map) { - var entries = []; - for (var key in map) entries.push({key: key, value: map[key]}); - return entries; -}; - -var uniform = function(min, max) { - min = min == null ? 0 : +min; - max = max == null ? 1 : +max; - if (arguments.length === 1) max = min, min = 0; - else max -= min; - return function() { - return Math.random() * max + min; + axis.tickArguments = function(_) { + return arguments.length ? (tickArguments = _ == null ? [] : slice$1.call(_), axis) : tickArguments.slice(); }; -}; - -var normal = function(mu, sigma) { - var x, r; - mu = mu == null ? 0 : +mu; - sigma = sigma == null ? 1 : +sigma; - return function() { - var y; - - // If available, use the second previously-generated uniform random. - if (x != null) y = x, x = null; - // Otherwise, generate a new x and y. - else do { - x = Math.random() * 2 - 1; - y = Math.random() * 2 - 1; - r = x * x + y * y; - } while (!r || r > 1); + axis.tickValues = function(_) { + return arguments.length ? (tickValues = _ == null ? null : slice$1.call(_), axis) : tickValues && tickValues.slice(); + }; - return mu + sigma * y * Math.sqrt(-2 * Math.log(r) / r); + axis.tickFormat = function(_) { + return arguments.length ? (tickFormat = _, axis) : tickFormat; }; -}; -var logNormal = function() { - var randomNormal = normal.apply(this, arguments); - return function() { - return Math.exp(randomNormal()); + axis.tickSize = function(_) { + return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner; }; -}; -var irwinHall = function(n) { - return function() { - for (var sum = 0, i = 0; i < n; ++i) sum += Math.random(); - return sum; + axis.tickSizeInner = function(_) { + return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner; }; -}; -var bates = function(n) { - var randomIrwinHall = irwinHall(n); - return function() { - return randomIrwinHall() / n; + axis.tickSizeOuter = function(_) { + return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter; }; -}; -var exponential = function(lambda) { - return function() { - return -Math.log(1 - Math.random()) / lambda; + axis.tickPadding = function(_) { + return arguments.length ? (tickPadding = +_, axis) : tickPadding; }; -}; -function linear(t) { - return +t; + return axis; } -function quadIn(t) { - return t * t; +function axisTop(scale) { + return axis(top, scale); } -function quadOut(t) { - return t * (2 - t); +function axisRight(scale) { + return axis(right, scale); } -function quadInOut(t) { - return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2; +function axisBottom(scale) { + return axis(bottom, scale); } -function cubicIn(t) { - return t * t * t; +function axisLeft(scale) { + return axis(left, scale); } -function cubicOut(t) { - return --t * t * t + 1; -} +var noop = {value: function() {}}; -function cubicInOut(t) { - return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2; +function dispatch() { + for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) { + if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t); + _[t] = []; + } + return new Dispatch(_); } -var exponent = 3; - -var polyIn = (function custom(e) { - e = +e; +function Dispatch(_) { + this._ = _; +} - function polyIn(t) { - return Math.pow(t, e); - } +function parseTypenames(typenames, types) { + return typenames.trim().split(/^|\s+/).map(function(t) { + var name = "", i = t.indexOf("."); + if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i); + if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t); + return {type: t, name: name}; + }); +} - polyIn.exponent = custom; +Dispatch.prototype = dispatch.prototype = { + constructor: Dispatch, + on: function(typename, callback) { + var _ = this._, + T = parseTypenames(typename + "", _), + t, + i = -1, + n = T.length; - return polyIn; -})(exponent); + // If no callback was specified, return the callback of the given type and name. + if (arguments.length < 2) { + while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t; + return; + } -var polyOut = (function custom(e) { - e = +e; + // If a type was specified, set the callback for the given type and name. + // Otherwise, if a null callback was specified, remove callbacks of the given name. + if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback); + while (++i < n) { + if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback); + else if (callback == null) for (t in _) _[t] = set(_[t], typename.name, null); + } - function polyOut(t) { - return 1 - Math.pow(1 - t, e); + return this; + }, + copy: function() { + var copy = {}, _ = this._; + for (var t in _) copy[t] = _[t].slice(); + return new Dispatch(copy); + }, + call: function(type, that) { + if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2]; + if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type); + for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args); + }, + apply: function(type, that, args) { + if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type); + for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args); } +}; - polyOut.exponent = custom; - - return polyOut; -})(exponent); - -var polyInOut = (function custom(e) { - e = +e; - - function polyInOut(t) { - return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2; +function get(type, name) { + for (var i = 0, n = type.length, c; i < n; ++i) { + if ((c = type[i]).name === name) { + return c.value; + } } +} - polyInOut.exponent = custom; +function set(type, name, callback) { + for (var i = 0, n = type.length; i < n; ++i) { + if (type[i].name === name) { + type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1)); + break; + } + } + if (callback != null) type.push({name: name, value: callback}); + return type; +} - return polyInOut; -})(exponent); +var xhtml = "http://www.w3.org/1999/xhtml"; -var pi = Math.PI; -var halfPi = pi / 2; +var namespaces = { + svg: "http://www.w3.org/2000/svg", + xhtml: xhtml, + xlink: "http://www.w3.org/1999/xlink", + xml: "http://www.w3.org/XML/1998/namespace", + xmlns: "http://www.w3.org/2000/xmlns/" +}; -function sinIn(t) { - return 1 - Math.cos(t * halfPi); -} +var namespace = function(name) { + var prefix = name += "", i = prefix.indexOf(":"); + if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1); + return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name; +}; -function sinOut(t) { - return Math.sin(t * halfPi); +function creatorInherit(name) { + return function() { + var document = this.ownerDocument, + uri = this.namespaceURI; + return uri === xhtml && document.documentElement.namespaceURI === xhtml + ? document.createElement(name) + : document.createElementNS(uri, name); + }; } -function sinInOut(t) { - return (1 - Math.cos(pi * t)) / 2; +function creatorFixed(fullname) { + return function() { + return this.ownerDocument.createElementNS(fullname.space, fullname.local); + }; } -function expIn(t) { - return Math.pow(2, 10 * t - 10); -} +var creator = function(name) { + var fullname = namespace(name); + return (fullname.local + ? creatorFixed + : creatorInherit)(fullname); +}; -function expOut(t) { - return 1 - Math.pow(2, -10 * t); -} +var nextId = 0; -function expInOut(t) { - return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2; +function local$1() { + return new Local; } -function circleIn(t) { - return 1 - Math.sqrt(1 - t * t); +function Local() { + this._ = "@" + (++nextId).toString(36); } -function circleOut(t) { - return Math.sqrt(1 - --t * t); -} +Local.prototype = local$1.prototype = { + constructor: Local, + get: function(node) { + var id = this._; + while (!(id in node)) if (!(node = node.parentNode)) return; + return node[id]; + }, + set: function(node, value) { + return node[this._] = value; + }, + remove: function(node) { + return this._ in node && delete node[this._]; + }, + toString: function() { + return this._; + } +}; -function circleInOut(t) { - return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2; +var matcher = function(selector) { + return function() { + return this.matches(selector); + }; +}; + +if (typeof document !== "undefined") { + var element = document.documentElement; + if (!element.matches) { + var vendorMatches = element.webkitMatchesSelector + || element.msMatchesSelector + || element.mozMatchesSelector + || element.oMatchesSelector; + matcher = function(selector) { + return function() { + return vendorMatches.call(this, selector); + }; + }; + } } -var b1 = 4 / 11; -var b2 = 6 / 11; -var b3 = 8 / 11; -var b4 = 3 / 4; -var b5 = 9 / 11; -var b6 = 10 / 11; -var b7 = 15 / 16; -var b8 = 21 / 22; -var b9 = 63 / 64; -var b0 = 1 / b1 / b1; +var matcher$1 = matcher; -function bounceIn(t) { - return 1 - bounceOut(1 - t); +var filterEvents = {}; + +exports.event = null; + +if (typeof document !== "undefined") { + var element$1 = document.documentElement; + if (!("onmouseenter" in element$1)) { + filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"}; + } } -function bounceOut(t) { - return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9; +function filterContextListener(listener, index, group) { + listener = contextListener(listener, index, group); + return function(event) { + var related = event.relatedTarget; + if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) { + listener.call(this, event); + } + }; } -function bounceInOut(t) { - return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2; +function contextListener(listener, index, group) { + return function(event1) { + var event0 = exports.event; // Events can be reentrant (e.g., focus). + exports.event = event1; + try { + listener.call(this, this.__data__, index, group); + } finally { + exports.event = event0; + } + }; } -var overshoot = 1.70158; +function parseTypenames$1(typenames) { + return typenames.trim().split(/^|\s+/).map(function(t) { + var name = "", i = t.indexOf("."); + if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i); + return {type: t, name: name}; + }); +} -var backIn = (function custom(s) { - s = +s; +function onRemove(typename) { + return function() { + var on = this.__on; + if (!on) return; + for (var j = 0, i = -1, m = on.length, o; j < m; ++j) { + if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) { + this.removeEventListener(o.type, o.listener, o.capture); + } else { + on[++i] = o; + } + } + if (++i) on.length = i; + else delete this.__on; + }; +} - function backIn(t) { - return t * t * ((s + 1) * t - s); - } +function onAdd(typename, value, capture) { + var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener; + return function(d, i, group) { + var on = this.__on, o, listener = wrap(value, i, group); + if (on) for (var j = 0, m = on.length; j < m; ++j) { + if ((o = on[j]).type === typename.type && o.name === typename.name) { + this.removeEventListener(o.type, o.listener, o.capture); + this.addEventListener(o.type, o.listener = listener, o.capture = capture); + o.value = value; + return; + } + } + this.addEventListener(typename.type, listener, capture); + o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture}; + if (!on) this.__on = [o]; + else on.push(o); + }; +} - backIn.overshoot = custom; +var selection_on = function(typename, value, capture) { + var typenames = parseTypenames$1(typename + ""), i, n = typenames.length, t; - return backIn; -})(overshoot); + if (arguments.length < 2) { + var on = this.node().__on; + if (on) for (var j = 0, m = on.length, o; j < m; ++j) { + for (i = 0, o = on[j]; i < n; ++i) { + if ((t = typenames[i]).type === o.type && t.name === o.name) { + return o.value; + } + } + } + return; + } -var backOut = (function custom(s) { - s = +s; + on = value ? onAdd : onRemove; + if (capture == null) capture = false; + for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture)); + return this; +}; - function backOut(t) { - return --t * t * ((s + 1) * t + s) + 1; +function customEvent(event1, listener, that, args) { + var event0 = exports.event; + event1.sourceEvent = exports.event; + exports.event = event1; + try { + return listener.apply(that, args); + } finally { + exports.event = event0; } +} - backOut.overshoot = custom; - - return backOut; -})(overshoot); +var sourceEvent = function() { + var current = exports.event, source; + while (source = current.sourceEvent) current = source; + return current; +}; -var backInOut = (function custom(s) { - s = +s; +var point = function(node, event) { + var svg = node.ownerSVGElement || node; - function backInOut(t) { - return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2; + if (svg.createSVGPoint) { + var point = svg.createSVGPoint(); + point.x = event.clientX, point.y = event.clientY; + point = point.matrixTransform(node.getScreenCTM().inverse()); + return [point.x, point.y]; } - backInOut.overshoot = custom; + var rect = node.getBoundingClientRect(); + return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop]; +}; - return backInOut; -})(overshoot); +var mouse = function(node) { + var event = sourceEvent(); + if (event.changedTouches) event = event.changedTouches[0]; + return point(node, event); +}; -var tau = 2 * Math.PI; -var amplitude = 1; -var period = 0.3; +function none() {} -var elasticIn = (function custom(a, p) { - var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau); +var selector = function(selector) { + return selector == null ? none : function() { + return this.querySelector(selector); + }; +}; - function elasticIn(t) { - return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p); +var selection_select = function(select) { + if (typeof select !== "function") select = selector(select); + + for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) { + for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) { + if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) { + if ("__data__" in node) subnode.__data__ = node.__data__; + subgroup[i] = subnode; + } + } } - elasticIn.amplitude = function(a) { return custom(a, p * tau); }; - elasticIn.period = function(p) { return custom(a, p); }; + return new Selection(subgroups, this._parents); +}; - return elasticIn; -})(amplitude, period); +function empty$1() { + return []; +} -var elasticOut = (function custom(a, p) { - var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau); +var selectorAll = function(selector) { + return selector == null ? empty$1 : function() { + return this.querySelectorAll(selector); + }; +}; - function elasticOut(t) { - return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p); - } +var selection_selectAll = function(select) { + if (typeof select !== "function") select = selectorAll(select); - elasticOut.amplitude = function(a) { return custom(a, p * tau); }; - elasticOut.period = function(p) { return custom(a, p); }; + for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) { + for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) { + if (node = group[i]) { + subgroups.push(select.call(node, node.__data__, i, group)); + parents.push(node); + } + } + } - return elasticOut; -})(amplitude, period); + return new Selection(subgroups, parents); +}; -var elasticInOut = (function custom(a, p) { - var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau); +var selection_filter = function(match) { + if (typeof match !== "function") match = matcher$1(match); - function elasticInOut(t) { - return ((t = t * 2 - 1) < 0 - ? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p) - : 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2; + for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) { + for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) { + if ((node = group[i]) && match.call(node, node.__data__, i, group)) { + subgroup.push(node); + } + } } - elasticInOut.amplitude = function(a) { return custom(a, p * tau); }; - elasticInOut.period = function(p) { return custom(a, p); }; - - return elasticInOut; -})(amplitude, period); + return new Selection(subgroups, this._parents); +}; -var area = function(polygon) { - var i = -1, - n = polygon.length, - a, - b = polygon[n - 1], - area = 0; +var sparse = function(update) { + return new Array(update.length); +}; - while (++i < n) { - a = b; - b = polygon[i]; - area += a[1] * b[0] - a[0] * b[1]; - } - - return area / 2; +var selection_enter = function() { + return new Selection(this._enter || this._groups.map(sparse), this._parents); }; -var centroid = function(polygon) { - var i = -1, - n = polygon.length, - x = 0, - y = 0, - a, - b = polygon[n - 1], - c, - k = 0; - - while (++i < n) { - a = b; - b = polygon[i]; - k += c = a[0] * b[1] - b[0] * a[1]; - x += (a[0] + b[0]) * c; - y += (a[1] + b[1]) * c; - } +function EnterNode(parent, datum) { + this.ownerDocument = parent.ownerDocument; + this.namespaceURI = parent.namespaceURI; + this._next = null; + this._parent = parent; + this.__data__ = datum; +} - return k *= 3, [x / k, y / k]; +EnterNode.prototype = { + constructor: EnterNode, + appendChild: function(child) { return this._parent.insertBefore(child, this._next); }, + insertBefore: function(child, next) { return this._parent.insertBefore(child, next); }, + querySelector: function(selector) { return this._parent.querySelector(selector); }, + querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); } }; -// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of -// the 3D cross product in a quadrant I Cartesian coordinate system (+x is -// right, +y is up). Returns a positive value if ABC is counter-clockwise, -// negative if clockwise, and zero if the points are collinear. -var cross = function(a, b, c) { - return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]); +var constant$1 = function(x) { + return function() { + return x; + }; }; -function lexicographicOrder(a, b) { - return a[0] - b[0] || a[1] - b[1]; +var keyPrefix = "$"; // Protect against keys like “__proto__”. + +function bindIndex(parent, group, enter, update, exit, data) { + var i = 0, + node, + groupLength = group.length, + dataLength = data.length; + + // Put any non-null nodes that fit into update. + // Put any null nodes into enter. + // Put any remaining data into enter. + for (; i < dataLength; ++i) { + if (node = group[i]) { + node.__data__ = data[i]; + update[i] = node; + } else { + enter[i] = new EnterNode(parent, data[i]); + } + } + + // Put any non-null nodes that don’t fit into exit. + for (; i < groupLength; ++i) { + if (node = group[i]) { + exit[i] = node; + } + } } -// Computes the upper convex hull per the monotone chain algorithm. -// Assumes points.length >= 3, is sorted by x, unique in y. -// Returns an array of indices into points in left-to-right order. -function computeUpperHullIndexes(points) { - var n = points.length, - indexes = [0, 1], - size = 2; +function bindKey(parent, group, enter, update, exit, data, key) { + var i, + node, + nodeByKeyValue = {}, + groupLength = group.length, + dataLength = data.length, + keyValues = new Array(groupLength), + keyValue; - for (var i = 2; i < n; ++i) { - while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size; - indexes[size++] = i; + // Compute the key for each node. + // If multiple nodes have the same key, the duplicates are added to exit. + for (i = 0; i < groupLength; ++i) { + if (node = group[i]) { + keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group); + if (keyValue in nodeByKeyValue) { + exit[i] = node; + } else { + nodeByKeyValue[keyValue] = node; + } + } } - return indexes.slice(0, size); // remove popped points + // Compute the key for each datum. + // If there a node associated with this key, join and add it to update. + // If there is not (or the key is a duplicate), add it to enter. + for (i = 0; i < dataLength; ++i) { + keyValue = keyPrefix + key.call(parent, data[i], i, data); + if (node = nodeByKeyValue[keyValue]) { + update[i] = node; + node.__data__ = data[i]; + nodeByKeyValue[keyValue] = null; + } else { + enter[i] = new EnterNode(parent, data[i]); + } + } + + // Add any remaining nodes that were not bound to data to exit. + for (i = 0; i < groupLength; ++i) { + if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) { + exit[i] = node; + } + } } -var hull = function(points) { - if ((n = points.length) < 3) return null; +var selection_data = function(value, key) { + if (!value) { + data = new Array(this.size()), j = -1; + this.each(function(d) { data[++j] = d; }); + return data; + } - var i, - n, - sortedPoints = new Array(n), - flippedPoints = new Array(n); + var bind = key ? bindKey : bindIndex, + parents = this._parents, + groups = this._groups; - for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i]; - sortedPoints.sort(lexicographicOrder); - for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]]; + if (typeof value !== "function") value = constant$1(value); - var upperIndexes = computeUpperHullIndexes(sortedPoints), - lowerIndexes = computeUpperHullIndexes(flippedPoints); + for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) { + var parent = parents[j], + group = groups[j], + groupLength = group.length, + data = value.call(parent, parent && parent.__data__, j, parents), + dataLength = data.length, + enterGroup = enter[j] = new Array(dataLength), + updateGroup = update[j] = new Array(dataLength), + exitGroup = exit[j] = new Array(groupLength); - // Construct the hull polygon, removing possible duplicate endpoints. - var skipLeft = lowerIndexes[0] === upperIndexes[0], - skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1], - hull = []; + bind(parent, group, enterGroup, updateGroup, exitGroup, data, key); - // Add upper hull in right-to-l order. - // Then add lower hull in left-to-right order. - for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]); - for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]); + // Now connect the enter nodes to their following update node, such that + // appendChild can insert the materialized enter node before this node, + // rather than at the end of the parent node. + for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) { + if (previous = enterGroup[i0]) { + if (i0 >= i1) i1 = i0 + 1; + while (!(next = updateGroup[i1]) && ++i1 < dataLength); + previous._next = next || null; + } + } + } - return hull; + update = new Selection(update, parents); + update._enter = enter; + update._exit = exit; + return update; }; -var contains = function(polygon, point) { - var n = polygon.length, - p = polygon[n - 1], - x = point[0], y = point[1], - x0 = p[0], y0 = p[1], - x1, y1, - inside = false; +var selection_exit = function() { + return new Selection(this._exit || this._groups.map(sparse), this._parents); +}; - for (var i = 0; i < n; ++i) { - p = polygon[i], x1 = p[0], y1 = p[1]; - if (((y1 > y) !== (y0 > y)) && (x < (x0 - x1) * (y - y1) / (y0 - y1) + x1)) inside = !inside; - x0 = x1, y0 = y1; +var selection_merge = function(selection) { + + for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) { + for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) { + if (node = group0[i] || group1[i]) { + merge[i] = node; + } + } } - return inside; + for (; j < m0; ++j) { + merges[j] = groups0[j]; + } + + return new Selection(merges, this._parents); }; -var length$1 = function(polygon) { - var i = -1, - n = polygon.length, - b = polygon[n - 1], - xa, - ya, - xb = b[0], - yb = b[1], - perimeter = 0; +var selection_order = function() { - while (++i < n) { - xa = xb; - ya = yb; - b = polygon[i]; - xb = b[0]; - yb = b[1]; - xa -= xb; - ya -= yb; - perimeter += Math.sqrt(xa * xa + ya * ya); + for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) { + for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) { + if (node = group[i]) { + if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next); + next = node; + } + } } - return perimeter; + return this; }; -var pi$1 = Math.PI; -var tau$1 = 2 * pi$1; -var epsilon = 1e-6; -var tauEpsilon = tau$1 - epsilon; +var selection_sort = function(compare) { + if (!compare) compare = ascending$1; -function Path() { - this._x0 = this._y0 = // start of current subpath - this._x1 = this._y1 = null; // end of current subpath - this._ = ""; -} + function compareNode(a, b) { + return a && b ? compare(a.__data__, b.__data__) : !a - !b; + } -function path() { - return new Path; -} + for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) { + for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) { + if (node = group[i]) { + sortgroup[i] = node; + } + } + sortgroup.sort(compareNode); + } -Path.prototype = path.prototype = { - constructor: Path, - moveTo: function(x, y) { - this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y); - }, - closePath: function() { - if (this._x1 !== null) { - this._x1 = this._x0, this._y1 = this._y0; - this._ += "Z"; - } - }, - lineTo: function(x, y) { - this._ += "L" + (this._x1 = +x) + "," + (this._y1 = +y); - }, - quadraticCurveTo: function(x1, y1, x, y) { - this._ += "Q" + (+x1) + "," + (+y1) + "," + (this._x1 = +x) + "," + (this._y1 = +y); - }, - bezierCurveTo: function(x1, y1, x2, y2, x, y) { - this._ += "C" + (+x1) + "," + (+y1) + "," + (+x2) + "," + (+y2) + "," + (this._x1 = +x) + "," + (this._y1 = +y); - }, - arcTo: function(x1, y1, x2, y2, r) { - x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r; - var x0 = this._x1, - y0 = this._y1, - x21 = x2 - x1, - y21 = y2 - y1, - x01 = x0 - x1, - y01 = y0 - y1, - l01_2 = x01 * x01 + y01 * y01; - - // Is the radius negative? Error. - if (r < 0) throw new Error("negative radius: " + r); - - // Is this path empty? Move to (x1,y1). - if (this._x1 === null) { - this._ += "M" + (this._x1 = x1) + "," + (this._y1 = y1); - } + return new Selection(sortgroups, this._parents).order(); +}; - // Or, is (x1,y1) coincident with (x0,y0)? Do nothing. - else if (!(l01_2 > epsilon)) {} +function ascending$1(a, b) { + return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN; +} - // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear? - // Equivalently, is (x1,y1) coincident with (x2,y2)? - // Or, is the radius zero? Line to (x1,y1). - else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon) || !r) { - this._ += "L" + (this._x1 = x1) + "," + (this._y1 = y1); - } +var selection_call = function() { + var callback = arguments[0]; + arguments[0] = this; + callback.apply(null, arguments); + return this; +}; - // Otherwise, draw an arc! - else { - var x20 = x2 - x0, - y20 = y2 - y0, - l21_2 = x21 * x21 + y21 * y21, - l20_2 = x20 * x20 + y20 * y20, - l21 = Math.sqrt(l21_2), - l01 = Math.sqrt(l01_2), - l = r * Math.tan((pi$1 - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2), - t01 = l / l01, - t21 = l / l21; +var selection_nodes = function() { + var nodes = new Array(this.size()), i = -1; + this.each(function() { nodes[++i] = this; }); + return nodes; +}; - // If the start tangent is not coincident with (x0,y0), line to. - if (Math.abs(t01 - 1) > epsilon) { - this._ += "L" + (x1 + t01 * x01) + "," + (y1 + t01 * y01); - } +var selection_node = function() { - this._ += "A" + r + "," + r + ",0,0," + (+(y01 * x20 > x01 * y20)) + "," + (this._x1 = x1 + t21 * x21) + "," + (this._y1 = y1 + t21 * y21); + for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) { + for (var group = groups[j], i = 0, n = group.length; i < n; ++i) { + var node = group[i]; + if (node) return node; } - }, - arc: function(x, y, r, a0, a1, ccw) { - x = +x, y = +y, r = +r; - var dx = r * Math.cos(a0), - dy = r * Math.sin(a0), - x0 = x + dx, - y0 = y + dy, - cw = 1 ^ ccw, - da = ccw ? a0 - a1 : a1 - a0; - - // Is the radius negative? Error. - if (r < 0) throw new Error("negative radius: " + r); + } - // Is this path empty? Move to (x0,y0). - if (this._x1 === null) { - this._ += "M" + x0 + "," + y0; - } + return null; +}; - // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0). - else if (Math.abs(this._x1 - x0) > epsilon || Math.abs(this._y1 - y0) > epsilon) { - this._ += "L" + x0 + "," + y0; - } +var selection_size = function() { + var size = 0; + this.each(function() { ++size; }); + return size; +}; - // Is this arc empty? We’re done. - if (!r) return; +var selection_empty = function() { + return !this.node(); +}; - // Is this a complete circle? Draw two arcs to complete the circle. - if (da > tauEpsilon) { - this._ += "A" + r + "," + r + ",0,1," + cw + "," + (x - dx) + "," + (y - dy) + "A" + r + "," + r + ",0,1," + cw + "," + (this._x1 = x0) + "," + (this._y1 = y0); - } +var selection_each = function(callback) { - // Otherwise, draw an arc! - else { - if (da < 0) da = da % tau$1 + tau$1; - this._ += "A" + r + "," + r + ",0," + (+(da >= pi$1)) + "," + cw + "," + (this._x1 = x + r * Math.cos(a1)) + "," + (this._y1 = y + r * Math.sin(a1)); + for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) { + for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) { + if (node = group[i]) callback.call(node, node.__data__, i, group); } - }, - rect: function(x, y, w, h) { - this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y) + "h" + (+w) + "v" + (+h) + "h" + (-w) + "Z"; - }, - toString: function() { - return this._; } -}; -var tree_add = function(d) { - var x = +this._x.call(null, d), - y = +this._y.call(null, d); - return add(this.cover(x, y), x, y, d); + return this; }; -function add(tree, x, y, d) { - if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points +function attrRemove(name) { + return function() { + this.removeAttribute(name); + }; +} - var parent, - node = tree._root, - leaf = {data: d}, - x0 = tree._x0, - y0 = tree._y0, - x1 = tree._x1, - y1 = tree._y1, - xm, - ym, - xp, - yp, - right, - bottom, - i, - j; +function attrRemoveNS(fullname) { + return function() { + this.removeAttributeNS(fullname.space, fullname.local); + }; +} - // If the tree is empty, initialize the root as a leaf. - if (!node) return tree._root = leaf, tree; +function attrConstant(name, value) { + return function() { + this.setAttribute(name, value); + }; +} - // Find the existing leaf for the new point, or add it. - while (node.length) { - if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm; - if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym; - if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree; - } +function attrConstantNS(fullname, value) { + return function() { + this.setAttributeNS(fullname.space, fullname.local, value); + }; +} - // Is the new point is exactly coincident with the existing point? - xp = +tree._x.call(null, node.data); - yp = +tree._y.call(null, node.data); - if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree; +function attrFunction(name, value) { + return function() { + var v = value.apply(this, arguments); + if (v == null) this.removeAttribute(name); + else this.setAttribute(name, v); + }; +} - // Otherwise, split the leaf node until the old and new point are separated. - do { - parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4); - if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm; - if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym; - } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm))); - return parent[j] = node, parent[i] = leaf, tree; +function attrFunctionNS(fullname, value) { + return function() { + var v = value.apply(this, arguments); + if (v == null) this.removeAttributeNS(fullname.space, fullname.local); + else this.setAttributeNS(fullname.space, fullname.local, v); + }; } -function addAll(data) { - var d, i, n = data.length, - x, - y, - xz = new Array(n), - yz = new Array(n), - x0 = Infinity, - y0 = Infinity, - x1 = -Infinity, - y1 = -Infinity; +var selection_attr = function(name, value) { + var fullname = namespace(name); - // Compute the points and their extent. - for (i = 0; i < n; ++i) { - if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue; - xz[i] = x; - yz[i] = y; - if (x < x0) x0 = x; - if (x > x1) x1 = x; - if (y < y0) y0 = y; - if (y > y1) y1 = y; + if (arguments.length < 2) { + var node = this.node(); + return fullname.local + ? node.getAttributeNS(fullname.space, fullname.local) + : node.getAttribute(fullname); } - // If there were no (valid) points, inherit the existing extent. - if (x1 < x0) x0 = this._x0, x1 = this._x1; - if (y1 < y0) y0 = this._y0, y1 = this._y1; + return this.each((value == null + ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function" + ? (fullname.local ? attrFunctionNS : attrFunction) + : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value)); +}; - // Expand the tree to cover the new points. - this.cover(x0, y0).cover(x1, y1); +var window = function(node) { + return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node + || (node.document && node) // node is a Window + || node.defaultView; // node is a Document +}; - // Add the new points. - for (i = 0; i < n; ++i) { - add(this, xz[i], yz[i], data[i]); - } +function styleRemove(name) { + return function() { + this.style.removeProperty(name); + }; +} - return this; +function styleConstant(name, value, priority) { + return function() { + this.style.setProperty(name, value, priority); + }; } -var tree_cover = function(x, y) { - if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points - - var x0 = this._x0, - y0 = this._y0, - x1 = this._x1, - y1 = this._y1; - - // If the quadtree has no extent, initialize them. - // Integer extent are necessary so that if we later double the extent, - // the existing quadrant boundaries don’t change due to floating point error! - if (isNaN(x0)) { - x1 = (x0 = Math.floor(x)) + 1; - y1 = (y0 = Math.floor(y)) + 1; - } - - // Otherwise, double repeatedly to cover. - else if (x0 > x || x > x1 || y0 > y || y > y1) { - var z = x1 - x0, - node = this._root, - parent, - i; +function styleFunction(name, value, priority) { + return function() { + var v = value.apply(this, arguments); + if (v == null) this.style.removeProperty(name); + else this.style.setProperty(name, v, priority); + }; +} - switch (i = (y < (y0 + y1) / 2) << 1 | (x < (x0 + x1) / 2)) { - case 0: { - do parent = new Array(4), parent[i] = node, node = parent; - while (z *= 2, x1 = x0 + z, y1 = y0 + z, x > x1 || y > y1); - break; - } - case 1: { - do parent = new Array(4), parent[i] = node, node = parent; - while (z *= 2, x0 = x1 - z, y1 = y0 + z, x0 > x || y > y1); - break; - } - case 2: { - do parent = new Array(4), parent[i] = node, node = parent; - while (z *= 2, x1 = x0 + z, y0 = y1 - z, x > x1 || y0 > y); - break; - } - case 3: { - do parent = new Array(4), parent[i] = node, node = parent; - while (z *= 2, x0 = x1 - z, y0 = y1 - z, x0 > x || y0 > y); - break; - } - } +var selection_style = function(name, value, priority) { + var node; + return arguments.length > 1 + ? this.each((value == null + ? styleRemove : typeof value === "function" + ? styleFunction + : styleConstant)(name, value, priority == null ? "" : priority)) + : window(node = this.node()) + .getComputedStyle(node, null) + .getPropertyValue(name); +}; - if (this._root && this._root.length) this._root = node; - } +function propertyRemove(name) { + return function() { + delete this[name]; + }; +} - // If the quadtree covers the point already, just return. - else return this; +function propertyConstant(name, value) { + return function() { + this[name] = value; + }; +} - this._x0 = x0; - this._y0 = y0; - this._x1 = x1; - this._y1 = y1; - return this; -}; +function propertyFunction(name, value) { + return function() { + var v = value.apply(this, arguments); + if (v == null) delete this[name]; + else this[name] = v; + }; +} -var tree_data = function() { - var data = []; - this.visit(function(node) { - if (!node.length) do data.push(node.data); while (node = node.next) - }); - return data; +var selection_property = function(name, value) { + return arguments.length > 1 + ? this.each((value == null + ? propertyRemove : typeof value === "function" + ? propertyFunction + : propertyConstant)(name, value)) + : this.node()[name]; }; -var tree_extent = function(_) { - return arguments.length - ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1]) - : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]]; -}; +function classArray(string) { + return string.trim().split(/^|\s+/); +} -var Quad = function(node, x0, y0, x1, y1) { - this.node = node; - this.x0 = x0; - this.y0 = y0; - this.x1 = x1; - this.y1 = y1; -}; +function classList(node) { + return node.classList || new ClassList(node); +} -var tree_find = function(x, y, radius) { - var data, - x0 = this._x0, - y0 = this._y0, - x1, - y1, - x2, - y2, - x3 = this._x1, - y3 = this._y1, - quads = [], - node = this._root, - q, - i; +function ClassList(node) { + this._node = node; + this._names = classArray(node.getAttribute("class") || ""); +} - if (node) quads.push(new Quad(node, x0, y0, x3, y3)); - if (radius == null) radius = Infinity; - else { - x0 = x - radius, y0 = y - radius; - x3 = x + radius, y3 = y + radius; - radius *= radius; +ClassList.prototype = { + add: function(name) { + var i = this._names.indexOf(name); + if (i < 0) { + this._names.push(name); + this._node.setAttribute("class", this._names.join(" ")); + } + }, + remove: function(name) { + var i = this._names.indexOf(name); + if (i >= 0) { + this._names.splice(i, 1); + this._node.setAttribute("class", this._names.join(" ")); + } + }, + contains: function(name) { + return this._names.indexOf(name) >= 0; } +}; - while (q = quads.pop()) { +function classedAdd(node, names) { + var list = classList(node), i = -1, n = names.length; + while (++i < n) list.add(names[i]); +} - // Stop searching if this quadrant can’t contain a closer node. - if (!(node = q.node) - || (x1 = q.x0) > x3 - || (y1 = q.y0) > y3 - || (x2 = q.x1) < x0 - || (y2 = q.y1) < y0) continue; +function classedRemove(node, names) { + var list = classList(node), i = -1, n = names.length; + while (++i < n) list.remove(names[i]); +} - // Bisect the current quadrant. - if (node.length) { - var xm = (x1 + x2) / 2, - ym = (y1 + y2) / 2; +function classedTrue(names) { + return function() { + classedAdd(this, names); + }; +} - quads.push( - new Quad(node[3], xm, ym, x2, y2), - new Quad(node[2], x1, ym, xm, y2), - new Quad(node[1], xm, y1, x2, ym), - new Quad(node[0], x1, y1, xm, ym) - ); +function classedFalse(names) { + return function() { + classedRemove(this, names); + }; +} - // Visit the closest quadrant first. - if (i = (y >= ym) << 1 | (x >= xm)) { - q = quads[quads.length - 1]; - quads[quads.length - 1] = quads[quads.length - 1 - i]; - quads[quads.length - 1 - i] = q; - } - } +function classedFunction(names, value) { + return function() { + (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names); + }; +} - // Visit this point. (Visiting coincident points isn’t necessary!) - else { - var dx = x - +this._x.call(null, node.data), - dy = y - +this._y.call(null, node.data), - d2 = dx * dx + dy * dy; - if (d2 < radius) { - var d = Math.sqrt(radius = d2); - x0 = x - d, y0 = y - d; - x3 = x + d, y3 = y + d; - data = node.data; - } - } +var selection_classed = function(name, value) { + var names = classArray(name + ""); + + if (arguments.length < 2) { + var list = classList(this.node()), i = -1, n = names.length; + while (++i < n) if (!list.contains(names[i])) return false; + return true; } - return data; + return this.each((typeof value === "function" + ? classedFunction : value + ? classedTrue + : classedFalse)(names, value)); }; -var tree_remove = function(d) { - if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points - - var parent, - node = this._root, - retainer, - previous, - next, - x0 = this._x0, - y0 = this._y0, - x1 = this._x1, - y1 = this._y1, - x, - y, - xm, - ym, - right, - bottom, - i, - j; +function textRemove() { + this.textContent = ""; +} - // If the tree is empty, initialize the root as a leaf. - if (!node) return this; - - // Find the leaf node for the point. - // While descending, also retain the deepest parent with a non-removed sibling. - if (node.length) while (true) { - if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm; - if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym; - if (!(parent = node, node = node[i = bottom << 1 | right])) return this; - if (!node.length) break; - if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i; - } +function textConstant(value) { + return function() { + this.textContent = value; + }; +} - // Find the point to remove. - while (node.data !== d) if (!(previous = node, node = node.next)) return this; - if (next = node.next) delete node.next; +function textFunction(value) { + return function() { + var v = value.apply(this, arguments); + this.textContent = v == null ? "" : v; + }; +} - // If there are multiple coincident points, remove just the point. - if (previous) return (next ? previous.next = next : delete previous.next), this; +var selection_text = function(value) { + return arguments.length + ? this.each(value == null + ? textRemove : (typeof value === "function" + ? textFunction + : textConstant)(value)) + : this.node().textContent; +}; - // If this is the root point, remove it. - if (!parent) return this._root = next, this; +function htmlRemove() { + this.innerHTML = ""; +} - // Remove this leaf. - next ? parent[i] = next : delete parent[i]; +function htmlConstant(value) { + return function() { + this.innerHTML = value; + }; +} - // If the parent now contains exactly one leaf, collapse superfluous parents. - if ((node = parent[0] || parent[1] || parent[2] || parent[3]) - && node === (parent[3] || parent[2] || parent[1] || parent[0]) - && !node.length) { - if (retainer) retainer[j] = node; - else this._root = node; - } +function htmlFunction(value) { + return function() { + var v = value.apply(this, arguments); + this.innerHTML = v == null ? "" : v; + }; +} - return this; +var selection_html = function(value) { + return arguments.length + ? this.each(value == null + ? htmlRemove : (typeof value === "function" + ? htmlFunction + : htmlConstant)(value)) + : this.node().innerHTML; }; -function removeAll(data) { - for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]); - return this; +function raise() { + if (this.nextSibling) this.parentNode.appendChild(this); } -var tree_root = function() { - return this._root; +var selection_raise = function() { + return this.each(raise); }; -var tree_size = function() { - var size = 0; - this.visit(function(node) { - if (!node.length) do ++size; while (node = node.next) - }); - return size; -}; +function lower() { + if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild); +} -var tree_visit = function(callback) { - var quads = [], q, node = this._root, child, x0, y0, x1, y1; - if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1)); - while (q = quads.pop()) { - if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) { - var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2; - if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1)); - if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1)); - if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym)); - if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym)); - } - } - return this; +var selection_lower = function() { + return this.each(lower); }; -var tree_visitAfter = function(callback) { - var quads = [], next = [], q; - if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1)); - while (q = quads.pop()) { - var node = q.node; - if (node.length) { - var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2; - if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym)); - if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym)); - if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1)); - if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1)); - } - next.push(q); - } - while (q = next.pop()) { - callback(q.node, q.x0, q.y0, q.x1, q.y1); - } - return this; +var selection_append = function(name) { + var create = typeof name === "function" ? name : creator(name); + return this.select(function() { + return this.appendChild(create.apply(this, arguments)); + }); }; -function defaultX(d) { - return d[0]; +function constantNull() { + return null; } -var tree_x = function(_) { - return arguments.length ? (this._x = _, this) : this._x; +var selection_insert = function(name, before) { + var create = typeof name === "function" ? name : creator(name), + select = before == null ? constantNull : typeof before === "function" ? before : selector(before); + return this.select(function() { + return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null); + }); }; -function defaultY(d) { - return d[1]; +function remove() { + var parent = this.parentNode; + if (parent) parent.removeChild(this); } -var tree_y = function(_) { - return arguments.length ? (this._y = _, this) : this._y; +var selection_remove = function() { + return this.each(remove); }; -function quadtree(nodes, x, y) { - var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN); - return nodes == null ? tree : tree.addAll(nodes); +var selection_datum = function(value) { + return arguments.length + ? this.property("__data__", value) + : this.node().__data__; +}; + +function dispatchEvent(node, type, params) { + var window$$1 = window(node), + event = window$$1.CustomEvent; + + if (event) { + event = new event(type, params); + } else { + event = window$$1.document.createEvent("Event"); + if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail; + else event.initEvent(type, false, false); + } + + node.dispatchEvent(event); } -function Quadtree(x, y, x0, y0, x1, y1) { - this._x = x; - this._y = y; - this._x0 = x0; - this._y0 = y0; - this._x1 = x1; - this._y1 = y1; - this._root = undefined; +function dispatchConstant(type, params) { + return function() { + return dispatchEvent(this, type, params); + }; } -function leaf_copy(leaf) { - var copy = {data: leaf.data}, next = copy; - while (leaf = leaf.next) next = next.next = {data: leaf.data}; - return copy; +function dispatchFunction(type, params) { + return function() { + return dispatchEvent(this, type, params.apply(this, arguments)); + }; } -var treeProto = quadtree.prototype = Quadtree.prototype; +var selection_dispatch = function(type, params) { + return this.each((typeof params === "function" + ? dispatchFunction + : dispatchConstant)(type, params)); +}; -treeProto.copy = function() { - var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1), - node = this._root, - nodes, - child; +var root = [null]; - if (!node) return copy; +function Selection(groups, parents) { + this._groups = groups; + this._parents = parents; +} - if (!node.length) return copy._root = leaf_copy(node), copy; +function selection() { + return new Selection([[document.documentElement]], root); +} - nodes = [{source: node, target: copy._root = new Array(4)}]; - while (node = nodes.pop()) { - for (var i = 0; i < 4; ++i) { - if (child = node.source[i]) { - if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)}); - else node.target[i] = leaf_copy(child); - } - } - } +Selection.prototype = selection.prototype = { + constructor: Selection, + select: selection_select, + selectAll: selection_selectAll, + filter: selection_filter, + data: selection_data, + enter: selection_enter, + exit: selection_exit, + merge: selection_merge, + order: selection_order, + sort: selection_sort, + call: selection_call, + nodes: selection_nodes, + node: selection_node, + size: selection_size, + empty: selection_empty, + each: selection_each, + attr: selection_attr, + style: selection_style, + property: selection_property, + classed: selection_classed, + text: selection_text, + html: selection_html, + raise: selection_raise, + lower: selection_lower, + append: selection_append, + insert: selection_insert, + remove: selection_remove, + datum: selection_datum, + on: selection_on, + dispatch: selection_dispatch +}; - return copy; +var select = function(selector) { + return typeof selector === "string" + ? new Selection([[document.querySelector(selector)]], [document.documentElement]) + : new Selection([[selector]], root); }; -treeProto.add = tree_add; -treeProto.addAll = addAll; -treeProto.cover = tree_cover; -treeProto.data = tree_data; -treeProto.extent = tree_extent; -treeProto.find = tree_find; -treeProto.remove = tree_remove; -treeProto.removeAll = removeAll; -treeProto.root = tree_root; -treeProto.size = tree_size; -treeProto.visit = tree_visit; -treeProto.visitAfter = tree_visitAfter; -treeProto.x = tree_x; -treeProto.y = tree_y; - -var slice$1 = [].slice; - -var noabort = {}; +var selectAll = function(selector) { + return typeof selector === "string" + ? new Selection([document.querySelectorAll(selector)], [document.documentElement]) + : new Selection([selector == null ? [] : selector], root); +}; -function Queue(size) { - if (!(size >= 1)) throw new Error; - this._size = size; - this._call = - this._error = null; - this._tasks = []; - this._data = []; - this._waiting = - this._active = - this._ended = - this._start = 0; // inside a synchronous task callback? -} +var touch = function(node, touches, identifier) { + if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches; -Queue.prototype = queue.prototype = { - constructor: Queue, - defer: function(callback) { - if (typeof callback !== "function" || this._call) throw new Error; - if (this._error != null) return this; - var t = slice$1.call(arguments, 1); - t.push(callback); - ++this._waiting, this._tasks.push(t); - poke(this); - return this; - }, - abort: function() { - if (this._error == null) abort(this, new Error("abort")); - return this; - }, - await: function(callback) { - if (typeof callback !== "function" || this._call) throw new Error; - this._call = function(error, results) { callback.apply(null, [error].concat(results)); }; - maybeNotify(this); - return this; - }, - awaitAll: function(callback) { - if (typeof callback !== "function" || this._call) throw new Error; - this._call = callback; - maybeNotify(this); - return this; + for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) { + if ((touch = touches[i]).identifier === identifier) { + return point(node, touch); + } } + + return null; }; -function poke(q) { - if (!q._start) { - try { start(q); } // let the current task complete - catch (e) { - if (q._tasks[q._ended + q._active - 1]) abort(q, e); // task errored synchronously - else if (!q._data) throw e; // await callback errored synchronously - } - } -} +var touches = function(node, touches) { + if (touches == null) touches = sourceEvent().touches; -function start(q) { - while (q._start = q._waiting && q._active < q._size) { - var i = q._ended + q._active, - t = q._tasks[i], - j = t.length - 1, - c = t[j]; - t[j] = end(q, i); - --q._waiting, ++q._active; - t = c.apply(null, t); - if (!q._tasks[i]) continue; // task finished synchronously - q._tasks[i] = t || noabort; + for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) { + points[i] = point(node, touches[i]); } -} -function end(q, i) { - return function(e, r) { - if (!q._tasks[i]) return; // ignore multiple callbacks - --q._active, ++q._ended; - q._tasks[i] = null; - if (q._error != null) return; // ignore secondary errors - if (e != null) { - abort(q, e); - } else { - q._data[i] = r; - if (q._waiting) poke(q); - else maybeNotify(q); - } - }; + return points; +}; + +function nopropagation() { + exports.event.stopImmediatePropagation(); } -function abort(q, e) { - var i = q._tasks.length, t; - q._error = e; // ignore active callbacks - q._data = undefined; // allow gc - q._waiting = NaN; // prevent starting +var noevent = function() { + exports.event.preventDefault(); + exports.event.stopImmediatePropagation(); +}; - while (--i >= 0) { - if (t = q._tasks[i]) { - q._tasks[i] = null; - if (t.abort) { - try { t.abort(); } - catch (e) { /* ignore */ } - } - } +var dragDisable = function(view) { + var root = view.document.documentElement, + selection$$1 = select(view).on("dragstart.drag", noevent, true); + if ("onselectstart" in root) { + selection$$1.on("selectstart.drag", noevent, true); + } else { + root.__noselect = root.style.MozUserSelect; + root.style.MozUserSelect = "none"; } +}; - q._active = NaN; // allow notification - maybeNotify(q); -} - -function maybeNotify(q) { - if (!q._active && q._call) { - var d = q._data; - q._data = undefined; // allow gc - q._call(q._error, d); +function yesdrag(view, noclick) { + var root = view.document.documentElement, + selection$$1 = select(view).on("dragstart.drag", null); + if (noclick) { + selection$$1.on("click.drag", noevent, true); + setTimeout(function() { selection$$1.on("click.drag", null); }, 0); + } + if ("onselectstart" in root) { + selection$$1.on("selectstart.drag", null); + } else { + root.style.MozUserSelect = root.__noselect; + delete root.__noselect; } -} - -function queue(concurrency) { - return new Queue(arguments.length ? +concurrency : Infinity); } var constant$2 = function(x) { - return function constant() { + return function() { return x; }; }; -var epsilon$1 = 1e-12; -var pi$2 = Math.PI; -var halfPi$1 = pi$2 / 2; -var tau$2 = 2 * pi$2; - -function arcInnerRadius(d) { - return d.innerRadius; -} - -function arcOuterRadius(d) { - return d.outerRadius; +function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) { + this.target = target; + this.type = type; + this.subject = subject; + this.identifier = id; + this.active = active; + this.x = x; + this.y = y; + this.dx = dx; + this.dy = dy; + this._ = dispatch; } -function arcStartAngle(d) { - return d.startAngle; -} +DragEvent.prototype.on = function() { + var value = this._.on.apply(this._, arguments); + return value === this._ ? this : value; +}; -function arcEndAngle(d) { - return d.endAngle; +// Ignore right-click, since that should open the context menu. +function defaultFilter$1() { + return !exports.event.button; } -function arcPadAngle(d) { - return d && d.padAngle; // Note: optional! +function defaultContainer() { + return this.parentNode; } -function asin(x) { - return x >= 1 ? halfPi$1 : x <= -1 ? -halfPi$1 : Math.asin(x); +function defaultSubject(d) { + return d == null ? {x: exports.event.x, y: exports.event.y} : d; } -function intersect(x0, y0, x1, y1, x2, y2, x3, y3) { - var x10 = x1 - x0, y10 = y1 - y0, - x32 = x3 - x2, y32 = y3 - y2, - t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10); - return [x0 + t * x10, y0 + t * y10]; -} +var drag = function() { + var filter = defaultFilter$1, + container = defaultContainer, + subject = defaultSubject, + gestures = {}, + listeners = dispatch("start", "drag", "end"), + active = 0, + mousemoving, + touchending; -// Compute perpendicular offset line of length rc. -// http://mathworld.wolfram.com/Circle-LineIntersection.html -function cornerTangents(x0, y0, x1, y1, r1, rc, cw) { - var x01 = x0 - x1, - y01 = y0 - y1, - lo = (cw ? rc : -rc) / Math.sqrt(x01 * x01 + y01 * y01), - ox = lo * y01, - oy = -lo * x01, - x11 = x0 + ox, - y11 = y0 + oy, - x10 = x1 + ox, - y10 = y1 + oy, - x00 = (x11 + x10) / 2, - y00 = (y11 + y10) / 2, - dx = x10 - x11, - dy = y10 - y11, - d2 = dx * dx + dy * dy, - r = r1 - rc, - D = x11 * y10 - x10 * y11, - d = (dy < 0 ? -1 : 1) * Math.sqrt(Math.max(0, r * r * d2 - D * D)), - cx0 = (D * dy - dx * d) / d2, - cy0 = (-D * dx - dy * d) / d2, - cx1 = (D * dy + dx * d) / d2, - cy1 = (-D * dx + dy * d) / d2, - dx0 = cx0 - x00, - dy0 = cy0 - y00, - dx1 = cx1 - x00, - dy1 = cy1 - y00; + function drag(selection$$1) { + selection$$1 + .on("mousedown.drag", mousedowned) + .on("touchstart.drag", touchstarted) + .on("touchmove.drag", touchmoved) + .on("touchend.drag touchcancel.drag", touchended) + .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)"); + } - // Pick the closer of the two intersection points. - // TODO Is there a faster way to determine which intersection to use? - if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1; + function mousedowned() { + if (touchending || !filter.apply(this, arguments)) return; + var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments); + if (!gesture) return; + select(exports.event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true); + dragDisable(exports.event.view); + nopropagation(); + mousemoving = false; + gesture("start"); + } - return { - cx: cx0, - cy: cy0, - x01: -ox, - y01: -oy, - x11: cx0 * (r1 / r - 1), - y11: cy0 * (r1 / r - 1) - }; -} - -var arc = function() { - var innerRadius = arcInnerRadius, - outerRadius = arcOuterRadius, - cornerRadius = constant$2(0), - padRadius = null, - startAngle = arcStartAngle, - endAngle = arcEndAngle, - padAngle = arcPadAngle, - context = null; - - function arc() { - var buffer, - r, - r0 = +innerRadius.apply(this, arguments), - r1 = +outerRadius.apply(this, arguments), - a0 = startAngle.apply(this, arguments) - halfPi$1, - a1 = endAngle.apply(this, arguments) - halfPi$1, - da = Math.abs(a1 - a0), - cw = a1 > a0; - - if (!context) context = buffer = path(); + function mousemoved() { + noevent(); + mousemoving = true; + gestures.mouse("drag"); + } - // Ensure that the outer radius is always larger than the inner radius. - if (r1 < r0) r = r1, r1 = r0, r0 = r; + function mouseupped() { + select(exports.event.view).on("mousemove.drag mouseup.drag", null); + yesdrag(exports.event.view, mousemoving); + noevent(); + gestures.mouse("end"); + } - // Is it a point? - if (!(r1 > epsilon$1)) context.moveTo(0, 0); + function touchstarted() { + if (!filter.apply(this, arguments)) return; + var touches$$1 = exports.event.changedTouches, + c = container.apply(this, arguments), + n = touches$$1.length, i, gesture; - // Or is it a circle or annulus? - else if (da > tau$2 - epsilon$1) { - context.moveTo(r1 * Math.cos(a0), r1 * Math.sin(a0)); - context.arc(0, 0, r1, a0, a1, !cw); - if (r0 > epsilon$1) { - context.moveTo(r0 * Math.cos(a1), r0 * Math.sin(a1)); - context.arc(0, 0, r0, a1, a0, cw); + for (i = 0; i < n; ++i) { + if (gesture = beforestart(touches$$1[i].identifier, c, touch, this, arguments)) { + nopropagation(); + gesture("start"); } } + } - // Or is it a circular or annular sector? - else { - var a01 = a0, - a11 = a1, - a00 = a0, - a10 = a1, - da0 = da, - da1 = da, - ap = padAngle.apply(this, arguments) / 2, - rp = (ap > epsilon$1) && (padRadius ? +padRadius.apply(this, arguments) : Math.sqrt(r0 * r0 + r1 * r1)), - rc = Math.min(Math.abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments)), - rc0 = rc, - rc1 = rc, - t0, - t1; - - // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0. - if (rp > epsilon$1) { - var p0 = asin(rp / r0 * Math.sin(ap)), - p1 = asin(rp / r1 * Math.sin(ap)); - if ((da0 -= p0 * 2) > epsilon$1) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0; - else da0 = 0, a00 = a10 = (a0 + a1) / 2; - if ((da1 -= p1 * 2) > epsilon$1) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1; - else da1 = 0, a01 = a11 = (a0 + a1) / 2; - } - - var x01 = r1 * Math.cos(a01), - y01 = r1 * Math.sin(a01), - x10 = r0 * Math.cos(a10), - y10 = r0 * Math.sin(a10); - - // Apply rounded corners? - if (rc > epsilon$1) { - var x11 = r1 * Math.cos(a11), - y11 = r1 * Math.sin(a11), - x00 = r0 * Math.cos(a00), - y00 = r0 * Math.sin(a00); - - // Restrict the corner radius according to the sector angle. - if (da < pi$2) { - var oc = da0 > epsilon$1 ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10], - ax = x01 - oc[0], - ay = y01 - oc[1], - bx = x11 - oc[0], - by = y11 - oc[1], - kc = 1 / Math.sin(Math.acos((ax * bx + ay * by) / (Math.sqrt(ax * ax + ay * ay) * Math.sqrt(bx * bx + by * by))) / 2), - lc = Math.sqrt(oc[0] * oc[0] + oc[1] * oc[1]); - rc0 = Math.min(rc, (r0 - lc) / (kc - 1)); - rc1 = Math.min(rc, (r1 - lc) / (kc + 1)); - } - } - - // Is the sector collapsed to a line? - if (!(da1 > epsilon$1)) context.moveTo(x01, y01); - - // Does the sector’s outer ring have rounded corners? - else if (rc1 > epsilon$1) { - t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw); - t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw); - - context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01); - - // Have the corners merged? - if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw); + function touchmoved() { + var touches$$1 = exports.event.changedTouches, + n = touches$$1.length, i, gesture; - // Otherwise, draw the two corners and the ring. - else { - context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw); - context.arc(0, 0, r1, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), !cw); - context.arc(t1.cx, t1.cy, rc1, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw); - } + for (i = 0; i < n; ++i) { + if (gesture = gestures[touches$$1[i].identifier]) { + noevent(); + gesture("drag"); } + } + } - // Or is the outer ring just a circular arc? - else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw); - - // Is there no inner ring, and it’s a circular sector? - // Or perhaps it’s an annular sector collapsed due to padding? - if (!(r0 > epsilon$1) || !(da0 > epsilon$1)) context.lineTo(x10, y10); - - // Does the sector’s inner ring (or point) have rounded corners? - else if (rc0 > epsilon$1) { - t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw); - t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw); - - context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01); - - // Have the corners merged? - if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw); + function touchended() { + var touches$$1 = exports.event.changedTouches, + n = touches$$1.length, i, gesture; - // Otherwise, draw the two corners and the ring. - else { - context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw); - context.arc(0, 0, r0, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), cw); - context.arc(t1.cx, t1.cy, rc0, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw); - } + if (touchending) clearTimeout(touchending); + touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed! + for (i = 0; i < n; ++i) { + if (gesture = gestures[touches$$1[i].identifier]) { + nopropagation(); + gesture("end"); } - - // Or is the inner ring just a circular arc? - else context.arc(0, 0, r0, a10, a00, cw); } - - context.closePath(); - - if (buffer) return context = null, buffer + "" || null; } - arc.centroid = function() { - var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2, - a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi$2 / 2; - return [Math.cos(a) * r, Math.sin(a) * r]; - }; - - arc.innerRadius = function(_) { - return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant$2(+_), arc) : innerRadius; - }; - - arc.outerRadius = function(_) { - return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant$2(+_), arc) : outerRadius; - }; + function beforestart(id, container, point, that, args) { + var p = point(container, id), s, dx, dy, + sublisteners = listeners.copy(); - arc.cornerRadius = function(_) { - return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant$2(+_), arc) : cornerRadius; - }; + if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() { + if ((exports.event.subject = s = subject.apply(that, args)) == null) return false; + dx = s.x - p[0] || 0; + dy = s.y - p[1] || 0; + return true; + })) return; - arc.padRadius = function(_) { - return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant$2(+_), arc) : padRadius; - }; + return function gesture(type) { + var p0 = p, n; + switch (type) { + case "start": gestures[id] = gesture, n = active++; break; + case "end": delete gestures[id], --active; // nobreak + case "drag": p = point(container, id), n = active; break; + } + customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]); + }; + } - arc.startAngle = function(_) { - return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$2(+_), arc) : startAngle; + drag.filter = function(_) { + return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter; }; - arc.endAngle = function(_) { - return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$2(+_), arc) : endAngle; + drag.container = function(_) { + return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container; }; - arc.padAngle = function(_) { - return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$2(+_), arc) : padAngle; + drag.subject = function(_) { + return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject; }; - arc.context = function(_) { - return arguments.length ? ((context = _ == null ? null : _), arc) : context; + drag.on = function() { + var value = listeners.on.apply(listeners, arguments); + return value === listeners ? drag : value; }; - return arc; -}; - -function Linear(context) { - this._context = context; -} - -Linear.prototype = { - areaStart: function() { - this._line = 0; - }, - areaEnd: function() { - this._line = NaN; - }, - lineStart: function() { - this._point = 0; - }, - lineEnd: function() { - if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); - this._line = 1 - this._line; - }, - point: function(x, y) { - x = +x, y = +y; - switch (this._point) { - case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; - case 1: this._point = 2; // proceed - default: this._context.lineTo(x, y); break; - } - } + return drag; }; -var curveLinear = function(context) { - return new Linear(context); +var define = function(constructor, factory, prototype) { + constructor.prototype = factory.prototype = prototype; + prototype.constructor = constructor; }; -function x(p) { - return p[0]; -} - -function y(p) { - return p[1]; +function extend(parent, definition) { + var prototype = Object.create(parent.prototype); + for (var key in definition) prototype[key] = definition[key]; + return prototype; } -var line = function() { - var x$$1 = x, - y$$1 = y, - defined = constant$2(true), - context = null, - curve = curveLinear, - output = null; - - function line(data) { - var i, - n = data.length, - d, - defined0 = false, - buffer; +function Color() {} - if (context == null) output = curve(buffer = path()); +var darker = 0.7; +var brighter = 1 / darker; - for (i = 0; i <= n; ++i) { - if (!(i < n && defined(d = data[i], i, data)) === defined0) { - if (defined0 = !defined0) output.lineStart(); - else output.lineEnd(); - } - if (defined0) output.point(+x$$1(d, i, data), +y$$1(d, i, data)); - } +var reI = "\\s*([+-]?\\d+)\\s*"; +var reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*"; +var reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*"; +var reHex3 = /^#([0-9a-f]{3})$/; +var reHex6 = /^#([0-9a-f]{6})$/; +var reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"); +var reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"); +var reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"); +var reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"); +var reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"); +var reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$"); - if (buffer) return output = null, buffer + "" || null; - } - - line.x = function(_) { - return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$2(+_), line) : x$$1; - }; - - line.y = function(_) { - return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$2(+_), line) : y$$1; - }; - - line.defined = function(_) { - return arguments.length ? (defined = typeof _ === "function" ? _ : constant$2(!!_), line) : defined; - }; - - line.curve = function(_) { - return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve; - }; - - line.context = function(_) { - return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context; - }; - - return line; -}; - -var area$1 = function() { - var x0 = x, - x1 = null, - y0 = constant$2(0), - y1 = y, - defined = constant$2(true), - context = null, - curve = curveLinear, - output = null; - - function area(data) { - var i, - j, - k, - n = data.length, - d, - defined0 = false, - buffer, - x0z = new Array(n), - y0z = new Array(n); - - if (context == null) output = curve(buffer = path()); - - for (i = 0; i <= n; ++i) { - if (!(i < n && defined(d = data[i], i, data)) === defined0) { - if (defined0 = !defined0) { - j = i; - output.areaStart(); - output.lineStart(); - } else { - output.lineEnd(); - output.lineStart(); - for (k = i - 1; k >= j; --k) { - output.point(x0z[k], y0z[k]); - } - output.lineEnd(); - output.areaEnd(); - } - } - if (defined0) { - x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data); - output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]); - } - } - - if (buffer) return output = null, buffer + "" || null; - } - - function arealine() { - return line().defined(defined).curve(curve).context(context); - } - - area.x = function(_) { - return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$2(+_), x1 = null, area) : x0; - }; - - area.x0 = function(_) { - return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$2(+_), area) : x0; - }; - - area.x1 = function(_) { - return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant$2(+_), area) : x1; - }; - - area.y = function(_) { - return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$2(+_), y1 = null, area) : y0; - }; - - area.y0 = function(_) { - return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$2(+_), area) : y0; - }; - - area.y1 = function(_) { - return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant$2(+_), area) : y1; - }; - - area.lineX0 = - area.lineY0 = function() { - return arealine().x(x0).y(y0); - }; - - area.lineY1 = function() { - return arealine().x(x0).y(y1); - }; - - area.lineX1 = function() { - return arealine().x(x1).y(y0); - }; - - area.defined = function(_) { - return arguments.length ? (defined = typeof _ === "function" ? _ : constant$2(!!_), area) : defined; - }; - - area.curve = function(_) { - return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve; - }; - - area.context = function(_) { - return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context; - }; - - return area; -}; - -var descending$1 = function(a, b) { - return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN; -}; - -var identity$1 = function(d) { - return d; -}; - -var pie = function() { - var value = identity$1, - sortValues = descending$1, - sort = null, - startAngle = constant$2(0), - endAngle = constant$2(tau$2), - padAngle = constant$2(0); - - function pie(data) { - var i, - n = data.length, - j, - k, - sum = 0, - index = new Array(n), - arcs = new Array(n), - a0 = +startAngle.apply(this, arguments), - da = Math.min(tau$2, Math.max(-tau$2, endAngle.apply(this, arguments) - a0)), - a1, - p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)), - pa = p * (da < 0 ? -1 : 1), - v; - - for (i = 0; i < n; ++i) { - if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) { - sum += v; - } - } - - // Optionally sort the arcs by previously-computed values or by data. - if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); }); - else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); }); - - // Compute the arcs! They are stored in the original data's order. - for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) { - j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = { - data: data[j], - index: i, - value: v, - startAngle: a0, - endAngle: a1, - padAngle: p - }; - } +var named = { + aliceblue: 0xf0f8ff, + antiquewhite: 0xfaebd7, + aqua: 0x00ffff, + aquamarine: 0x7fffd4, + azure: 0xf0ffff, + beige: 0xf5f5dc, + bisque: 0xffe4c4, + black: 0x000000, + blanchedalmond: 0xffebcd, + blue: 0x0000ff, + blueviolet: 0x8a2be2, + brown: 0xa52a2a, + burlywood: 0xdeb887, + cadetblue: 0x5f9ea0, + chartreuse: 0x7fff00, + chocolate: 0xd2691e, + coral: 0xff7f50, + cornflowerblue: 0x6495ed, + cornsilk: 0xfff8dc, + crimson: 0xdc143c, + cyan: 0x00ffff, + darkblue: 0x00008b, + darkcyan: 0x008b8b, + darkgoldenrod: 0xb8860b, + darkgray: 0xa9a9a9, + darkgreen: 0x006400, + darkgrey: 0xa9a9a9, + darkkhaki: 0xbdb76b, + darkmagenta: 0x8b008b, + darkolivegreen: 0x556b2f, + darkorange: 0xff8c00, + darkorchid: 0x9932cc, + darkred: 0x8b0000, + darksalmon: 0xe9967a, + darkseagreen: 0x8fbc8f, + darkslateblue: 0x483d8b, + darkslategray: 0x2f4f4f, + darkslategrey: 0x2f4f4f, + darkturquoise: 0x00ced1, + darkviolet: 0x9400d3, + deeppink: 0xff1493, + deepskyblue: 0x00bfff, + dimgray: 0x696969, + dimgrey: 0x696969, + dodgerblue: 0x1e90ff, + firebrick: 0xb22222, + floralwhite: 0xfffaf0, + forestgreen: 0x228b22, + fuchsia: 0xff00ff, + gainsboro: 0xdcdcdc, + ghostwhite: 0xf8f8ff, + gold: 0xffd700, + goldenrod: 0xdaa520, + gray: 0x808080, + green: 0x008000, + greenyellow: 0xadff2f, + grey: 0x808080, + honeydew: 0xf0fff0, + hotpink: 0xff69b4, + indianred: 0xcd5c5c, + indigo: 0x4b0082, + ivory: 0xfffff0, + khaki: 0xf0e68c, + lavender: 0xe6e6fa, + lavenderblush: 0xfff0f5, + lawngreen: 0x7cfc00, + lemonchiffon: 0xfffacd, + lightblue: 0xadd8e6, + lightcoral: 0xf08080, + lightcyan: 0xe0ffff, + lightgoldenrodyellow: 0xfafad2, + lightgray: 0xd3d3d3, + lightgreen: 0x90ee90, + lightgrey: 0xd3d3d3, + lightpink: 0xffb6c1, + lightsalmon: 0xffa07a, + lightseagreen: 0x20b2aa, + lightskyblue: 0x87cefa, + lightslategray: 0x778899, + lightslategrey: 0x778899, + lightsteelblue: 0xb0c4de, + lightyellow: 0xffffe0, + lime: 0x00ff00, + limegreen: 0x32cd32, + linen: 0xfaf0e6, + magenta: 0xff00ff, + maroon: 0x800000, + mediumaquamarine: 0x66cdaa, + mediumblue: 0x0000cd, + mediumorchid: 0xba55d3, + mediumpurple: 0x9370db, + mediumseagreen: 0x3cb371, + mediumslateblue: 0x7b68ee, + mediumspringgreen: 0x00fa9a, + mediumturquoise: 0x48d1cc, + mediumvioletred: 0xc71585, + midnightblue: 0x191970, + mintcream: 0xf5fffa, + mistyrose: 0xffe4e1, + moccasin: 0xffe4b5, + navajowhite: 0xffdead, + navy: 0x000080, + oldlace: 0xfdf5e6, + olive: 0x808000, + olivedrab: 0x6b8e23, + orange: 0xffa500, + orangered: 0xff4500, + orchid: 0xda70d6, + palegoldenrod: 0xeee8aa, + palegreen: 0x98fb98, + paleturquoise: 0xafeeee, + palevioletred: 0xdb7093, + papayawhip: 0xffefd5, + peachpuff: 0xffdab9, + peru: 0xcd853f, + pink: 0xffc0cb, + plum: 0xdda0dd, + powderblue: 0xb0e0e6, + purple: 0x800080, + rebeccapurple: 0x663399, + red: 0xff0000, + rosybrown: 0xbc8f8f, + royalblue: 0x4169e1, + saddlebrown: 0x8b4513, + salmon: 0xfa8072, + sandybrown: 0xf4a460, + seagreen: 0x2e8b57, + seashell: 0xfff5ee, + sienna: 0xa0522d, + silver: 0xc0c0c0, + skyblue: 0x87ceeb, + slateblue: 0x6a5acd, + slategray: 0x708090, + slategrey: 0x708090, + snow: 0xfffafa, + springgreen: 0x00ff7f, + steelblue: 0x4682b4, + tan: 0xd2b48c, + teal: 0x008080, + thistle: 0xd8bfd8, + tomato: 0xff6347, + turquoise: 0x40e0d0, + violet: 0xee82ee, + wheat: 0xf5deb3, + white: 0xffffff, + whitesmoke: 0xf5f5f5, + yellow: 0xffff00, + yellowgreen: 0x9acd32 +}; - return arcs; +define(Color, color, { + displayable: function() { + return this.rgb().displayable(); + }, + toString: function() { + return this.rgb() + ""; } +}); - pie.value = function(_) { - return arguments.length ? (value = typeof _ === "function" ? _ : constant$2(+_), pie) : value; - }; - - pie.sortValues = function(_) { - return arguments.length ? (sortValues = _, sort = null, pie) : sortValues; - }; - - pie.sort = function(_) { - return arguments.length ? (sort = _, sortValues = null, pie) : sort; - }; - - pie.startAngle = function(_) { - return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$2(+_), pie) : startAngle; - }; +function color(format) { + var m; + format = (format + "").trim().toLowerCase(); + return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00 + : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000 + : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0) + : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%) + : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1) + : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1) + : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%) + : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1) + : named.hasOwnProperty(format) ? rgbn(named[format]) + : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0) + : null; +} - pie.endAngle = function(_) { - return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$2(+_), pie) : endAngle; - }; +function rgbn(n) { + return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1); +} - pie.padAngle = function(_) { - return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$2(+_), pie) : padAngle; - }; +function rgba(r, g, b, a) { + if (a <= 0) r = g = b = NaN; + return new Rgb(r, g, b, a); +} - return pie; -}; +function rgbConvert(o) { + if (!(o instanceof Color)) o = color(o); + if (!o) return new Rgb; + o = o.rgb(); + return new Rgb(o.r, o.g, o.b, o.opacity); +} -var curveRadialLinear = curveRadial(curveLinear); +function rgb(r, g, b, opacity) { + return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity); +} -function Radial(curve) { - this._curve = curve; +function Rgb(r, g, b, opacity) { + this.r = +r; + this.g = +g; + this.b = +b; + this.opacity = +opacity; } -Radial.prototype = { - areaStart: function() { - this._curve.areaStart(); +define(Rgb, rgb, extend(Color, { + brighter: function(k) { + k = k == null ? brighter : Math.pow(brighter, k); + return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity); }, - areaEnd: function() { - this._curve.areaEnd(); + darker: function(k) { + k = k == null ? darker : Math.pow(darker, k); + return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity); }, - lineStart: function() { - this._curve.lineStart(); + rgb: function() { + return this; }, - lineEnd: function() { - this._curve.lineEnd(); + displayable: function() { + return (0 <= this.r && this.r <= 255) + && (0 <= this.g && this.g <= 255) + && (0 <= this.b && this.b <= 255) + && (0 <= this.opacity && this.opacity <= 1); }, - point: function(a, r) { - this._curve.point(r * Math.sin(a), r * -Math.cos(a)); + toString: function() { + var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a)); + return (a === 1 ? "rgb(" : "rgba(") + + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", " + + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", " + + Math.max(0, Math.min(255, Math.round(this.b) || 0)) + + (a === 1 ? ")" : ", " + a + ")"); } -}; +})); -function curveRadial(curve) { +function hsla(h, s, l, a) { + if (a <= 0) h = s = l = NaN; + else if (l <= 0 || l >= 1) h = s = NaN; + else if (s <= 0) h = NaN; + return new Hsl(h, s, l, a); +} - function radial(context) { - return new Radial(curve(context)); +function hslConvert(o) { + if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity); + if (!(o instanceof Color)) o = color(o); + if (!o) return new Hsl; + if (o instanceof Hsl) return o; + o = o.rgb(); + var r = o.r / 255, + g = o.g / 255, + b = o.b / 255, + min = Math.min(r, g, b), + max = Math.max(r, g, b), + h = NaN, + s = max - min, + l = (max + min) / 2; + if (s) { + if (r === max) h = (g - b) / s + (g < b) * 6; + else if (g === max) h = (b - r) / s + 2; + else h = (r - g) / s + 4; + s /= l < 0.5 ? max + min : 2 - max - min; + h *= 60; + } else { + s = l > 0 && l < 1 ? 0 : h; } - - radial._curve = curve; - - return radial; + return new Hsl(h, s, l, o.opacity); } -function radialLine(l) { - var c = l.curve; - - l.angle = l.x, delete l.x; - l.radius = l.y, delete l.y; - - l.curve = function(_) { - return arguments.length ? c(curveRadial(_)) : c()._curve; - }; - - return l; +function hsl(h, s, l, opacity) { + return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity); } -var radialLine$1 = function() { - return radialLine(line().curve(curveRadialLinear)); -}; - -var radialArea = function() { - var a = area$1().curve(curveRadialLinear), - c = a.curve, - x0 = a.lineX0, - x1 = a.lineX1, - y0 = a.lineY0, - y1 = a.lineY1; - - a.angle = a.x, delete a.x; - a.startAngle = a.x0, delete a.x0; - a.endAngle = a.x1, delete a.x1; - a.radius = a.y, delete a.y; - a.innerRadius = a.y0, delete a.y0; - a.outerRadius = a.y1, delete a.y1; - a.lineStartAngle = function() { return radialLine(x0()); }, delete a.lineX0; - a.lineEndAngle = function() { return radialLine(x1()); }, delete a.lineX1; - a.lineInnerRadius = function() { return radialLine(y0()); }, delete a.lineY0; - a.lineOuterRadius = function() { return radialLine(y1()); }, delete a.lineY1; - - a.curve = function(_) { - return arguments.length ? c(curveRadial(_)) : c()._curve; - }; - - return a; -}; - -var circle = { - draw: function(context, size) { - var r = Math.sqrt(size / pi$2); - context.moveTo(r, 0); - context.arc(0, 0, r, 0, tau$2); - } -}; - -var cross$1 = { - draw: function(context, size) { - var r = Math.sqrt(size / 5) / 2; - context.moveTo(-3 * r, -r); - context.lineTo(-r, -r); - context.lineTo(-r, -3 * r); - context.lineTo(r, -3 * r); - context.lineTo(r, -r); - context.lineTo(3 * r, -r); - context.lineTo(3 * r, r); - context.lineTo(r, r); - context.lineTo(r, 3 * r); - context.lineTo(-r, 3 * r); - context.lineTo(-r, r); - context.lineTo(-3 * r, r); - context.closePath(); - } -}; - -var tan30 = Math.sqrt(1 / 3); -var tan30_2 = tan30 * 2; - -var diamond = { - draw: function(context, size) { - var y = Math.sqrt(size / tan30_2), - x = y * tan30; - context.moveTo(0, -y); - context.lineTo(x, 0); - context.lineTo(0, y); - context.lineTo(-x, 0); - context.closePath(); - } -}; - -var ka = 0.89081309152928522810; -var kr = Math.sin(pi$2 / 10) / Math.sin(7 * pi$2 / 10); -var kx = Math.sin(tau$2 / 10) * kr; -var ky = -Math.cos(tau$2 / 10) * kr; - -var star = { - draw: function(context, size) { - var r = Math.sqrt(size * ka), - x = kx * r, - y = ky * r; - context.moveTo(0, -r); - context.lineTo(x, y); - for (var i = 1; i < 5; ++i) { - var a = tau$2 * i / 5, - c = Math.cos(a), - s = Math.sin(a); - context.lineTo(s * r, -c * r); - context.lineTo(c * x - s * y, s * x + c * y); - } - context.closePath(); - } -}; +function Hsl(h, s, l, opacity) { + this.h = +h; + this.s = +s; + this.l = +l; + this.opacity = +opacity; +} -var square = { - draw: function(context, size) { - var w = Math.sqrt(size), - x = -w / 2; - context.rect(x, x, w, w); +define(Hsl, hsl, extend(Color, { + brighter: function(k) { + k = k == null ? brighter : Math.pow(brighter, k); + return new Hsl(this.h, this.s, this.l * k, this.opacity); + }, + darker: function(k) { + k = k == null ? darker : Math.pow(darker, k); + return new Hsl(this.h, this.s, this.l * k, this.opacity); + }, + rgb: function() { + var h = this.h % 360 + (this.h < 0) * 360, + s = isNaN(h) || isNaN(this.s) ? 0 : this.s, + l = this.l, + m2 = l + (l < 0.5 ? l : 1 - l) * s, + m1 = 2 * l - m2; + return new Rgb( + hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2), + hsl2rgb(h, m1, m2), + hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2), + this.opacity + ); + }, + displayable: function() { + return (0 <= this.s && this.s <= 1 || isNaN(this.s)) + && (0 <= this.l && this.l <= 1) + && (0 <= this.opacity && this.opacity <= 1); } -}; +})); -var sqrt3 = Math.sqrt(3); +/* From FvD 13.37, CSS Color Module Level 3 */ +function hsl2rgb(h, m1, m2) { + return (h < 60 ? m1 + (m2 - m1) * h / 60 + : h < 180 ? m2 + : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 + : m1) * 255; +} -var triangle = { - draw: function(context, size) { - var y = -Math.sqrt(size / (sqrt3 * 3)); - context.moveTo(0, y * 2); - context.lineTo(-sqrt3 * y, -y); - context.lineTo(sqrt3 * y, -y); - context.closePath(); - } -}; +var deg2rad = Math.PI / 180; +var rad2deg = 180 / Math.PI; -var c = -0.5; -var s = Math.sqrt(3) / 2; -var k = 1 / Math.sqrt(12); -var a = (k / 2 + 1) * 3; +var Kn = 18; +var Xn = 0.950470; +var Yn = 1; +var Zn = 1.088830; +var t0 = 4 / 29; +var t1 = 6 / 29; +var t2 = 3 * t1 * t1; +var t3 = t1 * t1 * t1; -var wye = { - draw: function(context, size) { - var r = Math.sqrt(size / a), - x0 = r / 2, - y0 = r * k, - x1 = x0, - y1 = r * k + r, - x2 = -x1, - y2 = y1; - context.moveTo(x0, y0); - context.lineTo(x1, y1); - context.lineTo(x2, y2); - context.lineTo(c * x0 - s * y0, s * x0 + c * y0); - context.lineTo(c * x1 - s * y1, s * x1 + c * y1); - context.lineTo(c * x2 - s * y2, s * x2 + c * y2); - context.lineTo(c * x0 + s * y0, c * y0 - s * x0); - context.lineTo(c * x1 + s * y1, c * y1 - s * x1); - context.lineTo(c * x2 + s * y2, c * y2 - s * x2); - context.closePath(); +function labConvert(o) { + if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity); + if (o instanceof Hcl) { + var h = o.h * deg2rad; + return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity); } -}; + if (!(o instanceof Rgb)) o = rgbConvert(o); + var b = rgb2xyz(o.r), + a = rgb2xyz(o.g), + l = rgb2xyz(o.b), + x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn), + y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn), + z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn); + return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity); +} -var symbols = [ - circle, - cross$1, - diamond, - square, - star, - triangle, - wye -]; +function lab(l, a, b, opacity) { + return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity); +} -var symbol = function() { - var type = constant$2(circle), - size = constant$2(64), - context = null; +function Lab(l, a, b, opacity) { + this.l = +l; + this.a = +a; + this.b = +b; + this.opacity = +opacity; +} - function symbol() { - var buffer; - if (!context) context = buffer = path(); - type.apply(this, arguments).draw(context, +size.apply(this, arguments)); - if (buffer) return context = null, buffer + "" || null; +define(Lab, lab, extend(Color, { + brighter: function(k) { + return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity); + }, + darker: function(k) { + return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity); + }, + rgb: function() { + var y = (this.l + 16) / 116, + x = isNaN(this.a) ? y : y + this.a / 500, + z = isNaN(this.b) ? y : y - this.b / 200; + y = Yn * lab2xyz(y); + x = Xn * lab2xyz(x); + z = Zn * lab2xyz(z); + return new Rgb( + xyz2rgb( 3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB + xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z), + xyz2rgb( 0.0556434 * x - 0.2040259 * y + 1.0572252 * z), + this.opacity + ); } +})); - symbol.type = function(_) { - return arguments.length ? (type = typeof _ === "function" ? _ : constant$2(_), symbol) : type; - }; +function xyz2lab(t) { + return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0; +} - symbol.size = function(_) { - return arguments.length ? (size = typeof _ === "function" ? _ : constant$2(+_), symbol) : size; - }; +function lab2xyz(t) { + return t > t1 ? t * t * t : t2 * (t - t0); +} - symbol.context = function(_) { - return arguments.length ? (context = _ == null ? null : _, symbol) : context; - }; +function xyz2rgb(x) { + return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055); +} - return symbol; -}; +function rgb2xyz(x) { + return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4); +} -var noop = function() {}; +function hclConvert(o) { + if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity); + if (!(o instanceof Lab)) o = labConvert(o); + var h = Math.atan2(o.b, o.a) * rad2deg; + return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity); +} -function point(that, x, y) { - that._context.bezierCurveTo( - (2 * that._x0 + that._x1) / 3, - (2 * that._y0 + that._y1) / 3, - (that._x0 + 2 * that._x1) / 3, - (that._y0 + 2 * that._y1) / 3, - (that._x0 + 4 * that._x1 + x) / 6, - (that._y0 + 4 * that._y1 + y) / 6 - ); +function hcl(h, c, l, opacity) { + return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity); } -function Basis(context) { - this._context = context; +function Hcl(h, c, l, opacity) { + this.h = +h; + this.c = +c; + this.l = +l; + this.opacity = +opacity; } -Basis.prototype = { - areaStart: function() { - this._line = 0; - }, - areaEnd: function() { - this._line = NaN; - }, - lineStart: function() { - this._x0 = this._x1 = - this._y0 = this._y1 = NaN; - this._point = 0; +define(Hcl, hcl, extend(Color, { + brighter: function(k) { + return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity); }, - lineEnd: function() { - switch (this._point) { - case 3: point(this, this._x1, this._y1); // proceed - case 2: this._context.lineTo(this._x1, this._y1); break; - } - if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); - this._line = 1 - this._line; + darker: function(k) { + return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity); }, - point: function(x, y) { - x = +x, y = +y; - switch (this._point) { - case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; - case 1: this._point = 2; break; - case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed - default: point(this, x, y); break; - } - this._x0 = this._x1, this._x1 = x; - this._y0 = this._y1, this._y1 = y; + rgb: function() { + return labConvert(this).rgb(); } -}; +})); -var basis = function(context) { - return new Basis(context); -}; +var A = -0.14861; +var B = +1.78277; +var C = -0.29227; +var D = -0.90649; +var E = +1.97294; +var ED = E * D; +var EB = E * B; +var BC_DA = B * C - D * A; -function BasisClosed(context) { - this._context = context; +function cubehelixConvert(o) { + if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity); + if (!(o instanceof Rgb)) o = rgbConvert(o); + var r = o.r / 255, + g = o.g / 255, + b = o.b / 255, + l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB), + bl = b - l, + k = (E * (g - l) - C * bl) / D, + s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1 + h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN; + return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity); +} + +function cubehelix(h, s, l, opacity) { + return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity); +} + +function Cubehelix(h, s, l, opacity) { + this.h = +h; + this.s = +s; + this.l = +l; + this.opacity = +opacity; } -BasisClosed.prototype = { - areaStart: noop, - areaEnd: noop, - lineStart: function() { - this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = - this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN; - this._point = 0; +define(Cubehelix, cubehelix, extend(Color, { + brighter: function(k) { + k = k == null ? brighter : Math.pow(brighter, k); + return new Cubehelix(this.h, this.s, this.l * k, this.opacity); }, - lineEnd: function() { - switch (this._point) { - case 1: { - this._context.moveTo(this._x2, this._y2); - this._context.closePath(); - break; - } - case 2: { - this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3); - this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3); - this._context.closePath(); - break; - } - case 3: { - this.point(this._x2, this._y2); - this.point(this._x3, this._y3); - this.point(this._x4, this._y4); - break; - } - } + darker: function(k) { + k = k == null ? darker : Math.pow(darker, k); + return new Cubehelix(this.h, this.s, this.l * k, this.opacity); }, - point: function(x, y) { - x = +x, y = +y; - switch (this._point) { - case 0: this._point = 1; this._x2 = x, this._y2 = y; break; - case 1: this._point = 2; this._x3 = x, this._y3 = y; break; - case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break; - default: point(this, x, y); break; - } - this._x0 = this._x1, this._x1 = x; - this._y0 = this._y1, this._y1 = y; + rgb: function() { + var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad, + l = +this.l, + a = isNaN(this.s) ? 0 : this.s * l * (1 - l), + cosh = Math.cos(h), + sinh = Math.sin(h); + return new Rgb( + 255 * (l + a * (A * cosh + B * sinh)), + 255 * (l + a * (C * cosh + D * sinh)), + 255 * (l + a * (E * cosh)), + this.opacity + ); } +})); + +function basis(t1, v0, v1, v2, v3) { + var t2 = t1 * t1, t3 = t2 * t1; + return ((1 - 3 * t1 + 3 * t2 - t3) * v0 + + (4 - 6 * t2 + 3 * t3) * v1 + + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2 + + t3 * v3) / 6; +} + +var basis$1 = function(values) { + var n = values.length - 1; + return function(t) { + var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n), + v1 = values[i], + v2 = values[i + 1], + v0 = i > 0 ? values[i - 1] : 2 * v1 - v2, + v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1; + return basis((t - i / n) * n, v0, v1, v2, v3); + }; }; -var basisClosed = function(context) { - return new BasisClosed(context); +var basisClosed = function(values) { + var n = values.length; + return function(t) { + var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n), + v0 = values[(i + n - 1) % n], + v1 = values[i % n], + v2 = values[(i + 1) % n], + v3 = values[(i + 2) % n]; + return basis((t - i / n) * n, v0, v1, v2, v3); + }; }; -function BasisOpen(context) { - this._context = context; +var constant$3 = function(x) { + return function() { + return x; + }; +}; + +function linear(a, d) { + return function(t) { + return a + t * d; + }; } -BasisOpen.prototype = { - areaStart: function() { - this._line = 0; - }, - areaEnd: function() { - this._line = NaN; - }, - lineStart: function() { - this._x0 = this._x1 = - this._y0 = this._y1 = NaN; - this._point = 0; - }, - lineEnd: function() { - if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath(); - this._line = 1 - this._line; - }, - point: function(x, y) { - x = +x, y = +y; - switch (this._point) { - case 0: this._point = 1; break; - case 1: this._point = 2; break; - case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break; - case 3: this._point = 4; // proceed - default: point(this, x, y); break; - } - this._x0 = this._x1, this._x1 = x; - this._y0 = this._y1, this._y1 = y; - } -}; +function exponential(a, b, y) { + return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) { + return Math.pow(a + t * b, y); + }; +} -var basisOpen = function(context) { - return new BasisOpen(context); -}; +function hue(a, b) { + var d = b - a; + return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$3(isNaN(a) ? b : a); +} -function Bundle(context, beta) { - this._basis = new Basis(context); - this._beta = beta; +function gamma(y) { + return (y = +y) === 1 ? nogamma : function(a, b) { + return b - a ? exponential(a, b, y) : constant$3(isNaN(a) ? b : a); + }; } -Bundle.prototype = { - lineStart: function() { - this._x = []; - this._y = []; - this._basis.lineStart(); - }, - lineEnd: function() { - var x = this._x, - y = this._y, - j = x.length - 1; +function nogamma(a, b) { + var d = b - a; + return d ? linear(a, d) : constant$3(isNaN(a) ? b : a); +} - if (j > 0) { - var x0 = x[0], - y0 = y[0], - dx = x[j] - x0, - dy = y[j] - y0, - i = -1, - t; +var interpolateRgb = ((function rgbGamma(y) { + var color$$1 = gamma(y); - while (++i <= j) { - t = i / j; - this._basis.point( - this._beta * x[i] + (1 - this._beta) * (x0 + t * dx), - this._beta * y[i] + (1 - this._beta) * (y0 + t * dy) - ); - } + function rgb$$1(start, end) { + var r = color$$1((start = rgb(start)).r, (end = rgb(end)).r), + g = color$$1(start.g, end.g), + b = color$$1(start.b, end.b), + opacity = nogamma(start.opacity, end.opacity); + return function(t) { + start.r = r(t); + start.g = g(t); + start.b = b(t); + start.opacity = opacity(t); + return start + ""; + }; + } + + rgb$$1.gamma = rgbGamma; + + return rgb$$1; +}))(1); + +function rgbSpline(spline) { + return function(colors) { + var n = colors.length, + r = new Array(n), + g = new Array(n), + b = new Array(n), + i, color$$1; + for (i = 0; i < n; ++i) { + color$$1 = rgb(colors[i]); + r[i] = color$$1.r || 0; + g[i] = color$$1.g || 0; + b[i] = color$$1.b || 0; } + r = spline(r); + g = spline(g); + b = spline(b); + color$$1.opacity = 1; + return function(t) { + color$$1.r = r(t); + color$$1.g = g(t); + color$$1.b = b(t); + return color$$1 + ""; + }; + }; +} - this._x = this._y = null; - this._basis.lineEnd(); - }, - point: function(x, y) { - this._x.push(+x); - this._y.push(+y); - } -}; +var rgbBasis = rgbSpline(basis$1); +var rgbBasisClosed = rgbSpline(basisClosed); -var bundle = (function custom(beta) { +var array$1 = function(a, b) { + var nb = b ? b.length : 0, + na = a ? Math.min(nb, a.length) : 0, + x = new Array(nb), + c = new Array(nb), + i; - function bundle(context) { - return beta === 1 ? new Basis(context) : new Bundle(context, beta); - } + for (i = 0; i < na; ++i) x[i] = interpolateValue(a[i], b[i]); + for (; i < nb; ++i) c[i] = b[i]; - bundle.beta = function(beta) { - return custom(+beta); + return function(t) { + for (i = 0; i < na; ++i) c[i] = x[i](t); + return c; }; +}; - return bundle; -})(0.85); +var date = function(a, b) { + var d = new Date; + return a = +a, b -= a, function(t) { + return d.setTime(a + b * t), d; + }; +}; -function point$1(that, x, y) { - that._context.bezierCurveTo( - that._x1 + that._k * (that._x2 - that._x0), - that._y1 + that._k * (that._y2 - that._y0), - that._x2 + that._k * (that._x1 - x), - that._y2 + that._k * (that._y1 - y), - that._x2, - that._y2 - ); -} +var reinterpolate = function(a, b) { + return a = +a, b -= a, function(t) { + return a + b * t; + }; +}; -function Cardinal(context, tension) { - this._context = context; - this._k = (1 - tension) / 6; -} +var object = function(a, b) { + var i = {}, + c = {}, + k; -Cardinal.prototype = { - areaStart: function() { - this._line = 0; - }, - areaEnd: function() { - this._line = NaN; - }, - lineStart: function() { - this._x0 = this._x1 = this._x2 = - this._y0 = this._y1 = this._y2 = NaN; - this._point = 0; - }, - lineEnd: function() { - switch (this._point) { - case 2: this._context.lineTo(this._x2, this._y2); break; - case 3: point$1(this, this._x1, this._y1); break; - } - if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); - this._line = 1 - this._line; - }, - point: function(x, y) { - x = +x, y = +y; - switch (this._point) { - case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; - case 1: this._point = 2; this._x1 = x, this._y1 = y; break; - case 2: this._point = 3; // proceed - default: point$1(this, x, y); break; + if (a === null || typeof a !== "object") a = {}; + if (b === null || typeof b !== "object") b = {}; + + for (k in b) { + if (k in a) { + i[k] = interpolateValue(a[k], b[k]); + } else { + c[k] = b[k]; } - this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; - this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; } + + return function(t) { + for (k in i) c[k] = i[k](t); + return c; + }; }; -var cardinal = (function custom(tension) { +var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g; +var reB = new RegExp(reA.source, "g"); - function cardinal(context) { - return new Cardinal(context, tension); - } +function zero(b) { + return function() { + return b; + }; +} - cardinal.tension = function(tension) { - return custom(+tension); +function one(b) { + return function(t) { + return b(t) + ""; }; +} - return cardinal; -})(0); +var interpolateString = function(a, b) { + var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b + am, // current match in a + bm, // current match in b + bs, // string preceding current number in b, if any + i = -1, // index in s + s = [], // string constants and placeholders + q = []; // number interpolators -function CardinalClosed(context, tension) { - this._context = context; - this._k = (1 - tension) / 6; -} + // Coerce inputs to strings. + a = a + "", b = b + ""; -CardinalClosed.prototype = { - areaStart: noop, - areaEnd: noop, - lineStart: function() { - this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 = - this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN; - this._point = 0; - }, - lineEnd: function() { - switch (this._point) { - case 1: { - this._context.moveTo(this._x3, this._y3); - this._context.closePath(); - break; - } - case 2: { - this._context.lineTo(this._x3, this._y3); - this._context.closePath(); - break; - } - case 3: { - this.point(this._x3, this._y3); - this.point(this._x4, this._y4); - this.point(this._x5, this._y5); - break; - } + // Interpolate pairs of numbers in a & b. + while ((am = reA.exec(a)) + && (bm = reB.exec(b))) { + if ((bs = bm.index) > bi) { // a string precedes the next number in b + bs = b.slice(bi, bs); + if (s[i]) s[i] += bs; // coalesce with previous string + else s[++i] = bs; } - }, - point: function(x, y) { - x = +x, y = +y; - switch (this._point) { - case 0: this._point = 1; this._x3 = x, this._y3 = y; break; - case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break; - case 2: this._point = 3; this._x5 = x, this._y5 = y; break; - default: point$1(this, x, y); break; + if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match + if (s[i]) s[i] += bm; // coalesce with previous string + else s[++i] = bm; + } else { // interpolate non-matching numbers + s[++i] = null; + q.push({i: i, x: reinterpolate(am, bm)}); } - this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; - this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; + bi = reB.lastIndex; + } + + // Add remains of b. + if (bi < b.length) { + bs = b.slice(bi); + if (s[i]) s[i] += bs; // coalesce with previous string + else s[++i] = bs; } + + // Special optimization for only a single match. + // Otherwise, interpolate each of the numbers and rejoin the string. + return s.length < 2 ? (q[0] + ? one(q[0].x) + : zero(b)) + : (b = q.length, function(t) { + for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t); + return s.join(""); + }); }; -var cardinalClosed = (function custom(tension) { +var interpolateValue = function(a, b) { + var t = typeof b, c; + return b == null || t === "boolean" ? constant$3(b) + : (t === "number" ? reinterpolate + : t === "string" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString) + : b instanceof color ? interpolateRgb + : b instanceof Date ? date + : Array.isArray(b) ? array$1 + : isNaN(b) ? object + : reinterpolate)(a, b); +}; - function cardinal(context) { - return new CardinalClosed(context, tension); - } +var interpolateRound = function(a, b) { + return a = +a, b -= a, function(t) { + return Math.round(a + b * t); + }; +}; - cardinal.tension = function(tension) { - return custom(+tension); +var degrees = 180 / Math.PI; + +var identity$2 = { + translateX: 0, + translateY: 0, + rotate: 0, + skewX: 0, + scaleX: 1, + scaleY: 1 +}; + +var decompose = function(a, b, c, d, e, f) { + var scaleX, scaleY, skewX; + if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX; + if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX; + if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY; + if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX; + return { + translateX: e, + translateY: f, + rotate: Math.atan2(b, a) * degrees, + skewX: Math.atan(skewX) * degrees, + scaleX: scaleX, + scaleY: scaleY }; +}; - return cardinal; -})(0); +var cssNode; +var cssRoot; +var cssView; +var svgNode; -function CardinalOpen(context, tension) { - this._context = context; - this._k = (1 - tension) / 6; +function parseCss(value) { + if (value === "none") return identity$2; + if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView; + cssNode.style.transform = value; + value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform"); + cssRoot.removeChild(cssNode); + value = value.slice(7, -1).split(","); + return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]); } -CardinalOpen.prototype = { - areaStart: function() { - this._line = 0; - }, - areaEnd: function() { - this._line = NaN; - }, - lineStart: function() { - this._x0 = this._x1 = this._x2 = - this._y0 = this._y1 = this._y2 = NaN; - this._point = 0; - }, - lineEnd: function() { - if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath(); - this._line = 1 - this._line; - }, - point: function(x, y) { - x = +x, y = +y; - switch (this._point) { - case 0: this._point = 1; break; - case 1: this._point = 2; break; - case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break; - case 3: this._point = 4; // proceed - default: point$1(this, x, y); break; +function parseSvg(value) { + if (value == null) return identity$2; + if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g"); + svgNode.setAttribute("transform", value); + if (!(value = svgNode.transform.baseVal.consolidate())) return identity$2; + value = value.matrix; + return decompose(value.a, value.b, value.c, value.d, value.e, value.f); +} + +function interpolateTransform(parse, pxComma, pxParen, degParen) { + + function pop(s) { + return s.length ? s.pop() + " " : ""; + } + + function translate(xa, ya, xb, yb, s, q) { + if (xa !== xb || ya !== yb) { + var i = s.push("translate(", null, pxComma, null, pxParen); + q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)}); + } else if (xb || yb) { + s.push("translate(" + xb + pxComma + yb + pxParen); + } + } + + function rotate(a, b, s, q) { + if (a !== b) { + if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path + q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: reinterpolate(a, b)}); + } else if (b) { + s.push(pop(s) + "rotate(" + b + degParen); } - this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; - this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; } -}; -var cardinalOpen = (function custom(tension) { + function skewX(a, b, s, q) { + if (a !== b) { + q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: reinterpolate(a, b)}); + } else if (b) { + s.push(pop(s) + "skewX(" + b + degParen); + } + } - function cardinal(context) { - return new CardinalOpen(context, tension); + function scale(xa, ya, xb, yb, s, q) { + if (xa !== xb || ya !== yb) { + var i = s.push(pop(s) + "scale(", null, ",", null, ")"); + q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)}); + } else if (xb !== 1 || yb !== 1) { + s.push(pop(s) + "scale(" + xb + "," + yb + ")"); + } } - cardinal.tension = function(tension) { - return custom(+tension); + return function(a, b) { + var s = [], // string constants and placeholders + q = []; // number interpolators + a = parse(a), b = parse(b); + translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q); + rotate(a.rotate, b.rotate, s, q); + skewX(a.skewX, b.skewX, s, q); + scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q); + a = b = null; // gc + return function(t) { + var i = -1, n = q.length, o; + while (++i < n) s[(o = q[i]).i] = o.x(t); + return s.join(""); + }; }; +} - return cardinal; -})(0); - -function point$2(that, x, y) { - var x1 = that._x1, - y1 = that._y1, - x2 = that._x2, - y2 = that._y2; - - if (that._l01_a > epsilon$1) { - var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a, - n = 3 * that._l01_a * (that._l01_a + that._l12_a); - x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n; - y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n; - } +var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)"); +var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")"); - if (that._l23_a > epsilon$1) { - var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a, - m = 3 * that._l23_a * (that._l23_a + that._l12_a); - x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m; - y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m; - } +var rho = Math.SQRT2; +var rho2 = 2; +var rho4 = 4; +var epsilon2 = 1e-12; - that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2); +function cosh(x) { + return ((x = Math.exp(x)) + 1 / x) / 2; } -function CatmullRom(context, alpha) { - this._context = context; - this._alpha = alpha; +function sinh(x) { + return ((x = Math.exp(x)) - 1 / x) / 2; } -CatmullRom.prototype = { - areaStart: function() { - this._line = 0; - }, - areaEnd: function() { - this._line = NaN; - }, - lineStart: function() { - this._x0 = this._x1 = this._x2 = - this._y0 = this._y1 = this._y2 = NaN; - this._l01_a = this._l12_a = this._l23_a = - this._l01_2a = this._l12_2a = this._l23_2a = - this._point = 0; - }, - lineEnd: function() { - switch (this._point) { - case 2: this._context.lineTo(this._x2, this._y2); break; - case 3: this.point(this._x2, this._y2); break; - } - if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); - this._line = 1 - this._line; - }, - point: function(x, y) { - x = +x, y = +y; +function tanh(x) { + return ((x = Math.exp(2 * x)) - 1) / (x + 1); +} - if (this._point) { - var x23 = this._x2 - x, - y23 = this._y2 - y; - this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha)); - } +// p0 = [ux0, uy0, w0] +// p1 = [ux1, uy1, w1] +var interpolateZoom = function(p0, p1) { + var ux0 = p0[0], uy0 = p0[1], w0 = p0[2], + ux1 = p1[0], uy1 = p1[1], w1 = p1[2], + dx = ux1 - ux0, + dy = uy1 - uy0, + d2 = dx * dx + dy * dy, + i, + S; - switch (this._point) { - case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; - case 1: this._point = 2; break; - case 2: this._point = 3; // proceed - default: point$2(this, x, y); break; - } + // Special case for u0 ≅ u1. + if (d2 < epsilon2) { + S = Math.log(w1 / w0) / rho; + i = function(t) { + return [ + ux0 + t * dx, + uy0 + t * dy, + w0 * Math.exp(rho * t * S) + ]; + }; + } - this._l01_a = this._l12_a, this._l12_a = this._l23_a; - this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a; - this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; - this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; + // General case. + else { + var d1 = Math.sqrt(d2), + b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1), + b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1), + r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0), + r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1); + S = (r1 - r0) / rho; + i = function(t) { + var s = t * S, + coshr0 = cosh(r0), + u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0)); + return [ + ux0 + u * dx, + uy0 + u * dy, + w0 * coshr0 / cosh(rho * s + r0) + ]; + }; } -}; -var catmullRom = (function custom(alpha) { + i.duration = S * 1000; - function catmullRom(context) { - return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0); - } + return i; +}; - catmullRom.alpha = function(alpha) { - return custom(+alpha); - }; +function hsl$1(hue$$1) { + return function(start, end) { + var h = hue$$1((start = hsl(start)).h, (end = hsl(end)).h), + s = nogamma(start.s, end.s), + l = nogamma(start.l, end.l), + opacity = nogamma(start.opacity, end.opacity); + return function(t) { + start.h = h(t); + start.s = s(t); + start.l = l(t); + start.opacity = opacity(t); + return start + ""; + }; + } +} - return catmullRom; -})(0.5); +var hsl$2 = hsl$1(hue); +var hslLong = hsl$1(nogamma); -function CatmullRomClosed(context, alpha) { - this._context = context; - this._alpha = alpha; +function lab$1(start, end) { + var l = nogamma((start = lab(start)).l, (end = lab(end)).l), + a = nogamma(start.a, end.a), + b = nogamma(start.b, end.b), + opacity = nogamma(start.opacity, end.opacity); + return function(t) { + start.l = l(t); + start.a = a(t); + start.b = b(t); + start.opacity = opacity(t); + return start + ""; + }; } -CatmullRomClosed.prototype = { - areaStart: noop, - areaEnd: noop, - lineStart: function() { - this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 = - this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN; - this._l01_a = this._l12_a = this._l23_a = - this._l01_2a = this._l12_2a = this._l23_2a = - this._point = 0; - }, - lineEnd: function() { - switch (this._point) { - case 1: { - this._context.moveTo(this._x3, this._y3); - this._context.closePath(); - break; - } - case 2: { - this._context.lineTo(this._x3, this._y3); - this._context.closePath(); - break; - } - case 3: { - this.point(this._x3, this._y3); - this.point(this._x4, this._y4); - this.point(this._x5, this._y5); - break; - } - } - }, - point: function(x, y) { - x = +x, y = +y; +function hcl$1(hue$$1) { + return function(start, end) { + var h = hue$$1((start = hcl(start)).h, (end = hcl(end)).h), + c = nogamma(start.c, end.c), + l = nogamma(start.l, end.l), + opacity = nogamma(start.opacity, end.opacity); + return function(t) { + start.h = h(t); + start.c = c(t); + start.l = l(t); + start.opacity = opacity(t); + return start + ""; + }; + } +} - if (this._point) { - var x23 = this._x2 - x, - y23 = this._y2 - y; - this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha)); - } +var hcl$2 = hcl$1(hue); +var hclLong = hcl$1(nogamma); - switch (this._point) { - case 0: this._point = 1; this._x3 = x, this._y3 = y; break; - case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break; - case 2: this._point = 3; this._x5 = x, this._y5 = y; break; - default: point$2(this, x, y); break; - } +function cubehelix$1(hue$$1) { + return (function cubehelixGamma(y) { + y = +y; - this._l01_a = this._l12_a, this._l12_a = this._l23_a; - this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a; - this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; - this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; - } -}; + function cubehelix$$1(start, end) { + var h = hue$$1((start = cubehelix(start)).h, (end = cubehelix(end)).h), + s = nogamma(start.s, end.s), + l = nogamma(start.l, end.l), + opacity = nogamma(start.opacity, end.opacity); + return function(t) { + start.h = h(t); + start.s = s(t); + start.l = l(Math.pow(t, y)); + start.opacity = opacity(t); + return start + ""; + }; + } -var catmullRomClosed = (function custom(alpha) { + cubehelix$$1.gamma = cubehelixGamma; - function catmullRom(context) { - return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0); - } + return cubehelix$$1; + })(1); +} - catmullRom.alpha = function(alpha) { - return custom(+alpha); - }; +var cubehelix$2 = cubehelix$1(hue); +var cubehelixLong = cubehelix$1(nogamma); - return catmullRom; -})(0.5); +var quantize = function(interpolator, n) { + var samples = new Array(n); + for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1)); + return samples; +}; -function CatmullRomOpen(context, alpha) { - this._context = context; - this._alpha = alpha; +var frame = 0; +var timeout = 0; +var interval = 0; +var pokeDelay = 1000; +var taskHead; +var taskTail; +var clockLast = 0; +var clockNow = 0; +var clockSkew = 0; +var clock = typeof performance === "object" && performance.now ? performance : Date; +var setFrame = typeof requestAnimationFrame === "function" ? requestAnimationFrame : function(f) { setTimeout(f, 17); }; + +function now() { + return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew); } -CatmullRomOpen.prototype = { - areaStart: function() { - this._line = 0; - }, - areaEnd: function() { - this._line = NaN; - }, - lineStart: function() { - this._x0 = this._x1 = this._x2 = - this._y0 = this._y1 = this._y2 = NaN; - this._l01_a = this._l12_a = this._l23_a = - this._l01_2a = this._l12_2a = this._l23_2a = - this._point = 0; - }, - lineEnd: function() { - if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath(); - this._line = 1 - this._line; - }, - point: function(x, y) { - x = +x, y = +y; +function clearNow() { + clockNow = 0; +} - if (this._point) { - var x23 = this._x2 - x, - y23 = this._y2 - y; - this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha)); - } +function Timer() { + this._call = + this._time = + this._next = null; +} - switch (this._point) { - case 0: this._point = 1; break; - case 1: this._point = 2; break; - case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break; - case 3: this._point = 4; // proceed - default: point$2(this, x, y); break; +Timer.prototype = timer.prototype = { + constructor: Timer, + restart: function(callback, delay, time) { + if (typeof callback !== "function") throw new TypeError("callback is not a function"); + time = (time == null ? now() : +time) + (delay == null ? 0 : +delay); + if (!this._next && taskTail !== this) { + if (taskTail) taskTail._next = this; + else taskHead = this; + taskTail = this; + } + this._call = callback; + this._time = time; + sleep(); + }, + stop: function() { + if (this._call) { + this._call = null; + this._time = Infinity; + sleep(); } - - this._l01_a = this._l12_a, this._l12_a = this._l23_a; - this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a; - this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; - this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; } }; -var catmullRomOpen = (function custom(alpha) { +function timer(callback, delay, time) { + var t = new Timer; + t.restart(callback, delay, time); + return t; +} - function catmullRom(context) { - return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0); +function timerFlush() { + now(); // Get the current time, if not already set. + ++frame; // Pretend we’ve set an alarm, if we haven’t already. + var t = taskHead, e; + while (t) { + if ((e = clockNow - t._time) >= 0) t._call.call(null, e); + t = t._next; } + --frame; +} - catmullRom.alpha = function(alpha) { - return custom(+alpha); - }; +function wake() { + clockNow = (clockLast = clock.now()) + clockSkew; + frame = timeout = 0; + try { + timerFlush(); + } finally { + frame = 0; + nap(); + clockNow = 0; + } +} - return catmullRom; -})(0.5); +function poke() { + var now = clock.now(), delay = now - clockLast; + if (delay > pokeDelay) clockSkew -= delay, clockLast = now; +} -function LinearClosed(context) { - this._context = context; +function nap() { + var t0, t1 = taskHead, t2, time = Infinity; + while (t1) { + if (t1._call) { + if (time > t1._time) time = t1._time; + t0 = t1, t1 = t1._next; + } else { + t2 = t1._next, t1._next = null; + t1 = t0 ? t0._next = t2 : taskHead = t2; + } + } + taskTail = t0; + sleep(time); } -LinearClosed.prototype = { - areaStart: noop, - areaEnd: noop, - lineStart: function() { - this._point = 0; - }, - lineEnd: function() { - if (this._point) this._context.closePath(); - }, - point: function(x, y) { - x = +x, y = +y; - if (this._point) this._context.lineTo(x, y); - else this._point = 1, this._context.moveTo(x, y); +function sleep(time) { + if (frame) return; // Soonest alarm already set, or will be. + if (timeout) timeout = clearTimeout(timeout); + var delay = time - clockNow; + if (delay > 24) { + if (time < Infinity) timeout = setTimeout(wake, delay); + if (interval) interval = clearInterval(interval); + } else { + if (!interval) clockLast = clockNow, interval = setInterval(poke, pokeDelay); + frame = 1, setFrame(wake); } +} + +var timeout$1 = function(callback, delay, time) { + var t = new Timer; + delay = delay == null ? 0 : +delay; + t.restart(function(elapsed) { + t.stop(); + callback(elapsed + delay); + }, delay, time); + return t; }; -var linearClosed = function(context) { - return new LinearClosed(context); +var interval$1 = function(callback, delay, time) { + var t = new Timer, total = delay; + if (delay == null) return t.restart(callback, delay, time), t; + delay = +delay, time = time == null ? now() : +time; + t.restart(function tick(elapsed) { + elapsed += total; + t.restart(tick, total += delay, time); + callback(elapsed); + }, delay, time); + return t; }; -function sign(x) { - return x < 0 ? -1 : 1; -} +var emptyOn = dispatch("start", "end", "interrupt"); +var emptyTween = []; -// Calculate the slopes of the tangents (Hermite-type interpolation) based on -// the following paper: Steffen, M. 1990. A Simple Method for Monotonic -// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO. -// NOV(II), P. 443, 1990. -function slope3(that, x2, y2) { - var h0 = that._x1 - that._x0, - h1 = x2 - that._x1, - s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0), - s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0), - p = (s0 * h1 + s1 * h0) / (h0 + h1); - return (sign(s0) + sign(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0; -} +var CREATED = 0; +var SCHEDULED = 1; +var STARTING = 2; +var STARTED = 3; +var RUNNING = 4; +var ENDING = 5; +var ENDED = 6; -// Calculate a one-sided slope. -function slope2(that, t) { - var h = that._x1 - that._x0; - return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t; +var schedule = function(node, name, id, index, group, timing) { + var schedules = node.__transition; + if (!schedules) node.__transition = {}; + else if (id in schedules) return; + create(node, id, { + name: name, + index: index, // For context during callback. + group: group, // For context during callback. + on: emptyOn, + tween: emptyTween, + time: timing.time, + delay: timing.delay, + duration: timing.duration, + ease: timing.ease, + timer: null, + state: CREATED + }); +}; + +function init(node, id) { + var schedule = node.__transition; + if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error("too late"); + return schedule; } -// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations -// "you can express cubic Hermite interpolation in terms of cubic Bézier curves -// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1". -function point$3(that, t0, t1) { - var x0 = that._x0, - y0 = that._y0, - x1 = that._x1, - y1 = that._y1, - dx = (x1 - x0) / 3; - that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1); +function set$1(node, id) { + var schedule = node.__transition; + if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error("too late"); + return schedule; } -function MonotoneX(context) { - this._context = context; +function get$1(node, id) { + var schedule = node.__transition; + if (!schedule || !(schedule = schedule[id])) throw new Error("too late"); + return schedule; } -MonotoneX.prototype = { - areaStart: function() { - this._line = 0; - }, - areaEnd: function() { - this._line = NaN; - }, - lineStart: function() { - this._x0 = this._x1 = - this._y0 = this._y1 = - this._t0 = NaN; - this._point = 0; - }, - lineEnd: function() { - switch (this._point) { - case 2: this._context.lineTo(this._x1, this._y1); break; - case 3: point$3(this, this._t0, slope2(this, this._t0)); break; - } - if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); - this._line = 1 - this._line; - }, - point: function(x, y) { - var t1 = NaN; +function create(node, id, self) { + var schedules = node.__transition, + tween; - x = +x, y = +y; - if (x === this._x1 && y === this._y1) return; // Ignore coincident points. - switch (this._point) { - case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; - case 1: this._point = 2; break; - case 2: this._point = 3; point$3(this, slope2(this, t1 = slope3(this, x, y)), t1); break; - default: point$3(this, this._t0, t1 = slope3(this, x, y)); break; - } + // Initialize the self timer when the transition is created. + // Note the actual delay is not known until the first callback! + schedules[id] = self; + self.timer = timer(schedule, 0, self.time); - this._x0 = this._x1, this._x1 = x; - this._y0 = this._y1, this._y1 = y; - this._t0 = t1; + function schedule(elapsed) { + self.state = SCHEDULED; + self.timer.restart(start, self.delay, self.time); + + // If the elapsed delay is less than our first sleep, start immediately. + if (self.delay <= elapsed) start(elapsed - self.delay); } -}; -function MonotoneY(context) { - this._context = new ReflectContext(context); -} + function start(elapsed) { + var i, j, n, o; -(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) { - MonotoneX.prototype.point.call(this, y, x); -}; + // If the state is not SCHEDULED, then we previously errored on start. + if (self.state !== SCHEDULED) return stop(); -function ReflectContext(context) { - this._context = context; -} + for (i in schedules) { + o = schedules[i]; + if (o.name !== self.name) continue; -ReflectContext.prototype = { - moveTo: function(x, y) { this._context.moveTo(y, x); }, - closePath: function() { this._context.closePath(); }, - lineTo: function(x, y) { this._context.lineTo(y, x); }, - bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); } -}; + // While this element already has a starting transition during this frame, + // defer starting an interrupting transition until that transition has a + // chance to tick (and possibly end); see d3/d3-transition#54! + if (o.state === STARTED) return timeout$1(start); -function monotoneX(context) { - return new MonotoneX(context); -} + // Interrupt the active transition, if any. + // Dispatch the interrupt event. + if (o.state === RUNNING) { + o.state = ENDED; + o.timer.stop(); + o.on.call("interrupt", node, node.__data__, o.index, o.group); + delete schedules[i]; + } -function monotoneY(context) { - return new MonotoneY(context); -} + // Cancel any pre-empted transitions. No interrupt event is dispatched + // because the cancelled transitions never started. Note that this also + // removes this transition from the pending list! + else if (+i < id) { + o.state = ENDED; + o.timer.stop(); + delete schedules[i]; + } + } -function Natural(context) { - this._context = context; -} + // Defer the first tick to end of the current frame; see d3/d3#1576. + // Note the transition may be canceled after start and before the first tick! + // Note this must be scheduled before the start event; see d3/d3-transition#16! + // Assuming this is successful, subsequent callbacks go straight to tick. + timeout$1(function() { + if (self.state === STARTED) { + self.state = RUNNING; + self.timer.restart(tick, self.delay, self.time); + tick(elapsed); + } + }); -Natural.prototype = { - areaStart: function() { - this._line = 0; - }, - areaEnd: function() { - this._line = NaN; - }, - lineStart: function() { - this._x = []; - this._y = []; - }, - lineEnd: function() { - var x = this._x, - y = this._y, - n = x.length; + // Dispatch the start event. + // Note this must be done before the tween are initialized. + self.state = STARTING; + self.on.call("start", node, node.__data__, self.index, self.group); + if (self.state !== STARTING) return; // interrupted + self.state = STARTED; - if (n) { - this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]); - if (n === 2) { - this._context.lineTo(x[1], y[1]); - } else { - var px = controlPoints(x), - py = controlPoints(y); - for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) { - this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]); - } + // Initialize the tween, deleting null tween. + tween = new Array(n = self.tween.length); + for (i = 0, j = -1; i < n; ++i) { + if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) { + tween[++j] = o; } } + tween.length = j + 1; + } - if (this._line || (this._line !== 0 && n === 1)) this._context.closePath(); - this._line = 1 - this._line; - this._x = this._y = null; - }, - point: function(x, y) { - this._x.push(+x); - this._y.push(+y); + function tick(elapsed) { + var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1), + i = -1, + n = tween.length; + + while (++i < n) { + tween[i].call(null, t); + } + + // Dispatch the end event. + if (self.state === ENDING) { + self.on.call("end", node, node.__data__, self.index, self.group); + stop(); + } } -}; -// See https://www.particleincell.com/2012/bezier-splines/ for derivation. -function controlPoints(x) { - var i, - n = x.length - 1, - m, - a = new Array(n), - b = new Array(n), - r = new Array(n); - a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1]; - for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1]; - a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n]; - for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1]; - a[n - 1] = r[n - 1] / b[n - 1]; - for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i]; - b[n - 1] = (x[n] + a[n - 1]) / 2; - for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1]; - return [a, b]; + function stop() { + self.state = ENDED; + self.timer.stop(); + delete schedules[id]; + for (var i in schedules) return; // eslint-disable-line no-unused-vars + delete node.__transition; + } } -var natural = function(context) { - return new Natural(context); -}; +var interrupt = function(node, name) { + var schedules = node.__transition, + schedule, + active, + empty = true, + i; -function Step(context, t) { - this._context = context; - this._t = t; -} + if (!schedules) return; -Step.prototype = { - areaStart: function() { - this._line = 0; - }, - areaEnd: function() { - this._line = NaN; - }, - lineStart: function() { - this._x = this._y = NaN; - this._point = 0; - }, - lineEnd: function() { - if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y); - if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); - if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line; - }, - point: function(x, y) { - x = +x, y = +y; - switch (this._point) { - case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; - case 1: this._point = 2; // proceed - default: { - if (this._t <= 0) { - this._context.lineTo(this._x, y); - this._context.lineTo(x, y); - } else { - var x1 = this._x * (1 - this._t) + x * this._t; - this._context.lineTo(x1, this._y); - this._context.lineTo(x1, y); - } - break; - } - } - this._x = x, this._y = y; + name = name == null ? null : name + ""; + + for (i in schedules) { + if ((schedule = schedules[i]).name !== name) { empty = false; continue; } + active = schedule.state > STARTING && schedule.state < ENDING; + schedule.state = ENDED; + schedule.timer.stop(); + if (active) schedule.on.call("interrupt", node, node.__data__, schedule.index, schedule.group); + delete schedules[i]; } + + if (empty) delete node.__transition; +}; + +var selection_interrupt = function(name) { + return this.each(function() { + interrupt(this, name); + }); }; -var step = function(context) { - return new Step(context, 0.5); -}; +function tweenRemove(id, name) { + var tween0, tween1; + return function() { + var schedule = set$1(this, id), + tween = schedule.tween; -function stepBefore(context) { - return new Step(context, 0); -} + // If this node shared tween with the previous node, + // just assign the updated shared tween and we’re done! + // Otherwise, copy-on-write. + if (tween !== tween0) { + tween1 = tween0 = tween; + for (var i = 0, n = tween1.length; i < n; ++i) { + if (tween1[i].name === name) { + tween1 = tween1.slice(); + tween1.splice(i, 1); + break; + } + } + } -function stepAfter(context) { - return new Step(context, 1); + schedule.tween = tween1; + }; } -var slice$2 = Array.prototype.slice; +function tweenFunction(id, name, value) { + var tween0, tween1; + if (typeof value !== "function") throw new Error; + return function() { + var schedule = set$1(this, id), + tween = schedule.tween; -var none = function(series, order) { - if (!((n = series.length) > 1)) return; - for (var i = 1, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) { - s0 = s1, s1 = series[order[i]]; - for (var j = 0; j < m; ++j) { - s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1]; + // If this node shared tween with the previous node, + // just assign the updated shared tween and we’re done! + // Otherwise, copy-on-write. + if (tween !== tween0) { + tween1 = (tween0 = tween).slice(); + for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) { + if (tween1[i].name === name) { + tween1[i] = t; + break; + } + } + if (i === n) tween1.push(t); } - } -}; - -var none$1 = function(series) { - var n = series.length, o = new Array(n); - while (--n >= 0) o[n] = n; - return o; -}; -function stackValue(d, key) { - return d[key]; + schedule.tween = tween1; + }; } -var stack = function() { - var keys = constant$2([]), - order = none$1, - offset = none, - value = stackValue; +var transition_tween = function(name, value) { + var id = this._id; - function stack(data) { - var kz = keys.apply(this, arguments), - i, - m = data.length, - n = kz.length, - sz = new Array(n), - oz; + name += ""; - for (i = 0; i < n; ++i) { - for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) { - si[j] = sij = [0, +value(data[j], ki, j, data)]; - sij.data = data[j]; + if (arguments.length < 2) { + var tween = get$1(this.node(), id).tween; + for (var i = 0, n = tween.length, t; i < n; ++i) { + if ((t = tween[i]).name === name) { + return t.value; } - si.key = ki; - } - - for (i = 0, oz = order(sz); i < n; ++i) { - sz[oz[i]].index = i; } - - offset(sz, oz); - return sz; + return null; } - stack.keys = function(_) { - return arguments.length ? (keys = typeof _ === "function" ? _ : constant$2(slice$2.call(_)), stack) : keys; - }; + return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value)); +}; - stack.value = function(_) { - return arguments.length ? (value = typeof _ === "function" ? _ : constant$2(+_), stack) : value; - }; +function tweenValue(transition, name, value) { + var id = transition._id; - stack.order = function(_) { - return arguments.length ? (order = _ == null ? none$1 : typeof _ === "function" ? _ : constant$2(slice$2.call(_)), stack) : order; - }; + transition.each(function() { + var schedule = set$1(this, id); + (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments); + }); - stack.offset = function(_) { - return arguments.length ? (offset = _ == null ? none : _, stack) : offset; + return function(node) { + return get$1(node, id).value[name]; }; +} - return stack; +var interpolate$$1 = function(a, b) { + var c; + return (typeof b === "number" ? reinterpolate + : b instanceof color ? interpolateRgb + : (c = color(b)) ? (b = c, interpolateRgb) + : interpolateString)(a, b); }; -var expand = function(series, order) { - if (!((n = series.length) > 0)) return; - for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) { - for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0; - if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y; - } - none(series, order); -}; +function attrRemove$1(name) { + return function() { + this.removeAttribute(name); + }; +} -var silhouette = function(series, order) { - if (!((n = series.length) > 0)) return; - for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) { - for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0; - s0[j][1] += s0[j][0] = -y / 2; - } - none(series, order); -}; +function attrRemoveNS$1(fullname) { + return function() { + this.removeAttributeNS(fullname.space, fullname.local); + }; +} -var wiggle = function(series, order) { - if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return; - for (var y = 0, j = 1, s0, m, n; j < m; ++j) { - for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) { - var si = series[order[i]], - sij0 = si[j][1] || 0, - sij1 = si[j - 1][1] || 0, - s3 = (sij0 - sij1) / 2; - for (var k = 0; k < i; ++k) { - var sk = series[order[k]], - skj0 = sk[j][1] || 0, - skj1 = sk[j - 1][1] || 0; - s3 += skj0 - skj1; - } - s1 += sij0, s2 += s3 * sij0; - } - s0[j - 1][1] += s0[j - 1][0] = y; - if (s1) y -= s2 / s1; - } - s0[j - 1][1] += s0[j - 1][0] = y; - none(series, order); -}; +function attrConstant$1(name, interpolate$$1, value1) { + var value00, + interpolate0; + return function() { + var value0 = this.getAttribute(name); + return value0 === value1 ? null + : value0 === value00 ? interpolate0 + : interpolate0 = interpolate$$1(value00 = value0, value1); + }; +} -var ascending$1 = function(series) { - var sums = series.map(sum$1); - return none$1(series).sort(function(a, b) { return sums[a] - sums[b]; }); -}; +function attrConstantNS$1(fullname, interpolate$$1, value1) { + var value00, + interpolate0; + return function() { + var value0 = this.getAttributeNS(fullname.space, fullname.local); + return value0 === value1 ? null + : value0 === value00 ? interpolate0 + : interpolate0 = interpolate$$1(value00 = value0, value1); + }; +} -function sum$1(series) { - var s = 0, i = -1, n = series.length, v; - while (++i < n) if (v = +series[i][1]) s += v; - return s; +function attrFunction$1(name, interpolate$$1, value) { + var value00, + value10, + interpolate0; + return function() { + var value0, value1 = value(this); + if (value1 == null) return void this.removeAttribute(name); + value0 = this.getAttribute(name); + return value0 === value1 ? null + : value0 === value00 && value1 === value10 ? interpolate0 + : interpolate0 = interpolate$$1(value00 = value0, value10 = value1); + }; } -var descending$2 = function(series) { - return ascending$1(series).reverse(); +function attrFunctionNS$1(fullname, interpolate$$1, value) { + var value00, + value10, + interpolate0; + return function() { + var value0, value1 = value(this); + if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local); + value0 = this.getAttributeNS(fullname.space, fullname.local); + return value0 === value1 ? null + : value0 === value00 && value1 === value10 ? interpolate0 + : interpolate0 = interpolate$$1(value00 = value0, value10 = value1); + }; +} + +var transition_attr = function(name, value) { + var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate$$1; + return this.attrTween(name, typeof value === "function" + ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value)) + : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname) + : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value + "")); }; -var insideOut = function(series) { - var n = series.length, - i, - j, - sums = series.map(sum$1), - order = none$1(series).sort(function(a, b) { return sums[b] - sums[a]; }), - top = 0, - bottom = 0, - tops = [], - bottoms = []; +function attrTweenNS(fullname, value) { + function tween() { + var node = this, i = value.apply(node, arguments); + return i && function(t) { + node.setAttributeNS(fullname.space, fullname.local, i(t)); + }; + } + tween._value = value; + return tween; +} - for (i = 0; i < n; ++i) { - j = order[i]; - if (top < bottom) { - top += sums[j]; - tops.push(j); - } else { - bottom += sums[j]; - bottoms.push(j); - } +function attrTween(name, value) { + function tween() { + var node = this, i = value.apply(node, arguments); + return i && function(t) { + node.setAttribute(name, i(t)); + }; } + tween._value = value; + return tween; +} - return bottoms.reverse().concat(tops); +var transition_attrTween = function(name, value) { + var key = "attr." + name; + if (arguments.length < 2) return (key = this.tween(key)) && key._value; + if (value == null) return this.tween(key, null); + if (typeof value !== "function") throw new Error; + var fullname = namespace(name); + return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value)); }; -var reverse = function(series) { - return none$1(series).reverse(); -}; +function delayFunction(id, value) { + return function() { + init(this, id).delay = +value.apply(this, arguments); + }; +} -var define = function(constructor, factory, prototype) { - constructor.prototype = factory.prototype = prototype; - prototype.constructor = constructor; +function delayConstant(id, value) { + return value = +value, function() { + init(this, id).delay = value; + }; +} + +var transition_delay = function(value) { + var id = this._id; + + return arguments.length + ? this.each((typeof value === "function" + ? delayFunction + : delayConstant)(id, value)) + : get$1(this.node(), id).delay; }; -function extend(parent, definition) { - var prototype = Object.create(parent.prototype); - for (var key in definition) prototype[key] = definition[key]; - return prototype; +function durationFunction(id, value) { + return function() { + set$1(this, id).duration = +value.apply(this, arguments); + }; } -function Color() {} +function durationConstant(id, value) { + return value = +value, function() { + set$1(this, id).duration = value; + }; +} -var darker = 0.7; -var brighter = 1 / darker; +var transition_duration = function(value) { + var id = this._id; -var reI = "\\s*([+-]?\\d+)\\s*"; -var reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*"; -var reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*"; -var reHex3 = /^#([0-9a-f]{3})$/; -var reHex6 = /^#([0-9a-f]{6})$/; -var reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"); -var reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"); -var reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"); -var reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"); -var reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"); -var reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$"); + return arguments.length + ? this.each((typeof value === "function" + ? durationFunction + : durationConstant)(id, value)) + : get$1(this.node(), id).duration; +}; -var named = { - aliceblue: 0xf0f8ff, - antiquewhite: 0xfaebd7, - aqua: 0x00ffff, - aquamarine: 0x7fffd4, - azure: 0xf0ffff, - beige: 0xf5f5dc, - bisque: 0xffe4c4, - black: 0x000000, - blanchedalmond: 0xffebcd, - blue: 0x0000ff, - blueviolet: 0x8a2be2, - brown: 0xa52a2a, - burlywood: 0xdeb887, - cadetblue: 0x5f9ea0, - chartreuse: 0x7fff00, - chocolate: 0xd2691e, - coral: 0xff7f50, - cornflowerblue: 0x6495ed, - cornsilk: 0xfff8dc, - crimson: 0xdc143c, - cyan: 0x00ffff, - darkblue: 0x00008b, - darkcyan: 0x008b8b, - darkgoldenrod: 0xb8860b, - darkgray: 0xa9a9a9, - darkgreen: 0x006400, - darkgrey: 0xa9a9a9, - darkkhaki: 0xbdb76b, - darkmagenta: 0x8b008b, - darkolivegreen: 0x556b2f, - darkorange: 0xff8c00, - darkorchid: 0x9932cc, - darkred: 0x8b0000, - darksalmon: 0xe9967a, - darkseagreen: 0x8fbc8f, - darkslateblue: 0x483d8b, - darkslategray: 0x2f4f4f, - darkslategrey: 0x2f4f4f, - darkturquoise: 0x00ced1, - darkviolet: 0x9400d3, - deeppink: 0xff1493, - deepskyblue: 0x00bfff, - dimgray: 0x696969, - dimgrey: 0x696969, - dodgerblue: 0x1e90ff, - firebrick: 0xb22222, - floralwhite: 0xfffaf0, - forestgreen: 0x228b22, - fuchsia: 0xff00ff, - gainsboro: 0xdcdcdc, - ghostwhite: 0xf8f8ff, - gold: 0xffd700, - goldenrod: 0xdaa520, - gray: 0x808080, - green: 0x008000, - greenyellow: 0xadff2f, - grey: 0x808080, - honeydew: 0xf0fff0, - hotpink: 0xff69b4, - indianred: 0xcd5c5c, - indigo: 0x4b0082, - ivory: 0xfffff0, - khaki: 0xf0e68c, - lavender: 0xe6e6fa, - lavenderblush: 0xfff0f5, - lawngreen: 0x7cfc00, - lemonchiffon: 0xfffacd, - lightblue: 0xadd8e6, - lightcoral: 0xf08080, - lightcyan: 0xe0ffff, - lightgoldenrodyellow: 0xfafad2, - lightgray: 0xd3d3d3, - lightgreen: 0x90ee90, - lightgrey: 0xd3d3d3, - lightpink: 0xffb6c1, - lightsalmon: 0xffa07a, - lightseagreen: 0x20b2aa, - lightskyblue: 0x87cefa, - lightslategray: 0x778899, - lightslategrey: 0x778899, - lightsteelblue: 0xb0c4de, - lightyellow: 0xffffe0, - lime: 0x00ff00, - limegreen: 0x32cd32, - linen: 0xfaf0e6, - magenta: 0xff00ff, - maroon: 0x800000, - mediumaquamarine: 0x66cdaa, - mediumblue: 0x0000cd, - mediumorchid: 0xba55d3, - mediumpurple: 0x9370db, - mediumseagreen: 0x3cb371, - mediumslateblue: 0x7b68ee, - mediumspringgreen: 0x00fa9a, - mediumturquoise: 0x48d1cc, - mediumvioletred: 0xc71585, - midnightblue: 0x191970, - mintcream: 0xf5fffa, - mistyrose: 0xffe4e1, - moccasin: 0xffe4b5, - navajowhite: 0xffdead, - navy: 0x000080, - oldlace: 0xfdf5e6, - olive: 0x808000, - olivedrab: 0x6b8e23, - orange: 0xffa500, - orangered: 0xff4500, - orchid: 0xda70d6, - palegoldenrod: 0xeee8aa, - palegreen: 0x98fb98, - paleturquoise: 0xafeeee, - palevioletred: 0xdb7093, - papayawhip: 0xffefd5, - peachpuff: 0xffdab9, - peru: 0xcd853f, - pink: 0xffc0cb, - plum: 0xdda0dd, - powderblue: 0xb0e0e6, - purple: 0x800080, - rebeccapurple: 0x663399, - red: 0xff0000, - rosybrown: 0xbc8f8f, - royalblue: 0x4169e1, - saddlebrown: 0x8b4513, - salmon: 0xfa8072, - sandybrown: 0xf4a460, - seagreen: 0x2e8b57, - seashell: 0xfff5ee, - sienna: 0xa0522d, - silver: 0xc0c0c0, - skyblue: 0x87ceeb, - slateblue: 0x6a5acd, - slategray: 0x708090, - slategrey: 0x708090, - snow: 0xfffafa, - springgreen: 0x00ff7f, - steelblue: 0x4682b4, - tan: 0xd2b48c, - teal: 0x008080, - thistle: 0xd8bfd8, - tomato: 0xff6347, - turquoise: 0x40e0d0, - violet: 0xee82ee, - wheat: 0xf5deb3, - white: 0xffffff, - whitesmoke: 0xf5f5f5, - yellow: 0xffff00, - yellowgreen: 0x9acd32 +function easeConstant(id, value) { + if (typeof value !== "function") throw new Error; + return function() { + set$1(this, id).ease = value; + }; +} + +var transition_ease = function(value) { + var id = this._id; + + return arguments.length + ? this.each(easeConstant(id, value)) + : get$1(this.node(), id).ease; }; -define(Color, color, { - displayable: function() { - return this.rgb().displayable(); - }, - toString: function() { - return this.rgb() + ""; +var transition_filter = function(match) { + if (typeof match !== "function") match = matcher$1(match); + + for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) { + for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) { + if ((node = group[i]) && match.call(node, node.__data__, i, group)) { + subgroup.push(node); + } + } } -}); -function color(format) { - var m; - format = (format + "").trim().toLowerCase(); - return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00 - : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000 - : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0) - : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%) - : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1) - : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1) - : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%) - : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1) - : named.hasOwnProperty(format) ? rgbn(named[format]) - : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0) - : null; -} + return new Transition(subgroups, this._parents, this._name, this._id); +}; + +var transition_merge = function(transition) { + if (transition._id !== this._id) throw new Error; -function rgbn(n) { - return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1); -} + for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) { + for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) { + if (node = group0[i] || group1[i]) { + merge[i] = node; + } + } + } -function rgba(r, g, b, a) { - if (a <= 0) r = g = b = NaN; - return new Rgb(r, g, b, a); -} + for (; j < m0; ++j) { + merges[j] = groups0[j]; + } -function rgbConvert(o) { - if (!(o instanceof Color)) o = color(o); - if (!o) return new Rgb; - o = o.rgb(); - return new Rgb(o.r, o.g, o.b, o.opacity); -} + return new Transition(merges, this._parents, this._name, this._id); +}; -function rgb(r, g, b, opacity) { - return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity); +function start(name) { + return (name + "").trim().split(/^|\s+/).every(function(t) { + var i = t.indexOf("."); + if (i >= 0) t = t.slice(0, i); + return !t || t === "start"; + }); } -function Rgb(r, g, b, opacity) { - this.r = +r; - this.g = +g; - this.b = +b; - this.opacity = +opacity; -} +function onFunction(id, name, listener) { + var on0, on1, sit = start(name) ? init : set$1; + return function() { + var schedule = sit(this, id), + on = schedule.on; -define(Rgb, rgb, extend(Color, { - brighter: function(k) { - k = k == null ? brighter : Math.pow(brighter, k); - return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity); - }, - darker: function(k) { - k = k == null ? darker : Math.pow(darker, k); - return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity); - }, - rgb: function() { - return this; - }, - displayable: function() { - return (0 <= this.r && this.r <= 255) - && (0 <= this.g && this.g <= 255) - && (0 <= this.b && this.b <= 255) - && (0 <= this.opacity && this.opacity <= 1); - }, - toString: function() { - var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a)); - return (a === 1 ? "rgb(" : "rgba(") - + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", " - + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", " - + Math.max(0, Math.min(255, Math.round(this.b) || 0)) - + (a === 1 ? ")" : ", " + a + ")"); - } -})); + // If this node shared a dispatch with the previous node, + // just assign the updated shared dispatch and we’re done! + // Otherwise, copy-on-write. + if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener); -function hsla(h, s, l, a) { - if (a <= 0) h = s = l = NaN; - else if (l <= 0 || l >= 1) h = s = NaN; - else if (s <= 0) h = NaN; - return new Hsl(h, s, l, a); + schedule.on = on1; + }; } -function hslConvert(o) { - if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity); - if (!(o instanceof Color)) o = color(o); - if (!o) return new Hsl; - if (o instanceof Hsl) return o; - o = o.rgb(); - var r = o.r / 255, - g = o.g / 255, - b = o.b / 255, - min = Math.min(r, g, b), - max = Math.max(r, g, b), - h = NaN, - s = max - min, - l = (max + min) / 2; - if (s) { - if (r === max) h = (g - b) / s + (g < b) * 6; - else if (g === max) h = (b - r) / s + 2; - else h = (r - g) / s + 4; - s /= l < 0.5 ? max + min : 2 - max - min; - h *= 60; - } else { - s = l > 0 && l < 1 ? 0 : h; - } - return new Hsl(h, s, l, o.opacity); -} +var transition_on = function(name, listener) { + var id = this._id; -function hsl(h, s, l, opacity) { - return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity); -} + return arguments.length < 2 + ? get$1(this.node(), id).on.on(name) + : this.each(onFunction(id, name, listener)); +}; -function Hsl(h, s, l, opacity) { - this.h = +h; - this.s = +s; - this.l = +l; - this.opacity = +opacity; +function removeFunction(id) { + return function() { + var parent = this.parentNode; + for (var i in this.__transition) if (+i !== id) return; + if (parent) parent.removeChild(this); + }; } -define(Hsl, hsl, extend(Color, { - brighter: function(k) { - k = k == null ? brighter : Math.pow(brighter, k); - return new Hsl(this.h, this.s, this.l * k, this.opacity); - }, - darker: function(k) { - k = k == null ? darker : Math.pow(darker, k); - return new Hsl(this.h, this.s, this.l * k, this.opacity); - }, - rgb: function() { - var h = this.h % 360 + (this.h < 0) * 360, - s = isNaN(h) || isNaN(this.s) ? 0 : this.s, - l = this.l, - m2 = l + (l < 0.5 ? l : 1 - l) * s, - m1 = 2 * l - m2; - return new Rgb( - hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2), - hsl2rgb(h, m1, m2), - hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2), - this.opacity - ); - }, - displayable: function() { - return (0 <= this.s && this.s <= 1 || isNaN(this.s)) - && (0 <= this.l && this.l <= 1) - && (0 <= this.opacity && this.opacity <= 1); +var transition_remove = function() { + return this.on("end.remove", removeFunction(this._id)); +}; + +var transition_select = function(select$$1) { + var name = this._name, + id = this._id; + + if (typeof select$$1 !== "function") select$$1 = selector(select$$1); + + for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) { + for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) { + if ((node = group[i]) && (subnode = select$$1.call(node, node.__data__, i, group))) { + if ("__data__" in node) subnode.__data__ = node.__data__; + subgroup[i] = subnode; + schedule(subgroup[i], name, id, i, subgroup, get$1(node, id)); + } + } } -})); -/* From FvD 13.37, CSS Color Module Level 3 */ -function hsl2rgb(h, m1, m2) { - return (h < 60 ? m1 + (m2 - m1) * h / 60 - : h < 180 ? m2 - : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 - : m1) * 255; -} + return new Transition(subgroups, this._parents, name, id); +}; -var deg2rad = Math.PI / 180; -var rad2deg = 180 / Math.PI; +var transition_selectAll = function(select$$1) { + var name = this._name, + id = this._id; -var Kn = 18; -var Xn = 0.950470; -var Yn = 1; -var Zn = 1.088830; -var t0 = 4 / 29; -var t1 = 6 / 29; -var t2 = 3 * t1 * t1; -var t3 = t1 * t1 * t1; + if (typeof select$$1 !== "function") select$$1 = selectorAll(select$$1); -function labConvert(o) { - if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity); - if (o instanceof Hcl) { - var h = o.h * deg2rad; - return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity); + for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) { + for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) { + if (node = group[i]) { + for (var children = select$$1.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) { + if (child = children[k]) { + schedule(child, name, id, k, children, inherit); + } + } + subgroups.push(children); + parents.push(node); + } + } } - if (!(o instanceof Rgb)) o = rgbConvert(o); - var b = rgb2xyz(o.r), - a = rgb2xyz(o.g), - l = rgb2xyz(o.b), - x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn), - y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn), - z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn); - return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity); -} -function lab(l, a, b, opacity) { - return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity); -} + return new Transition(subgroups, parents, name, id); +}; -function Lab(l, a, b, opacity) { - this.l = +l; - this.a = +a; - this.b = +b; - this.opacity = +opacity; -} +var Selection$1 = selection.prototype.constructor; -define(Lab, lab, extend(Color, { - brighter: function(k) { - return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity); - }, - darker: function(k) { - return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity); - }, - rgb: function() { - var y = (this.l + 16) / 116, - x = isNaN(this.a) ? y : y + this.a / 500, - z = isNaN(this.b) ? y : y - this.b / 200; - y = Yn * lab2xyz(y); - x = Xn * lab2xyz(x); - z = Zn * lab2xyz(z); - return new Rgb( - xyz2rgb( 3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB - xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z), - xyz2rgb( 0.0556434 * x - 0.2040259 * y + 1.0572252 * z), - this.opacity - ); - } -})); +var transition_selection = function() { + return new Selection$1(this._groups, this._parents); +}; -function xyz2lab(t) { - return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0; +function styleRemove$1(name, interpolate$$2) { + var value00, + value10, + interpolate0; + return function() { + var style = window(this).getComputedStyle(this, null), + value0 = style.getPropertyValue(name), + value1 = (this.style.removeProperty(name), style.getPropertyValue(name)); + return value0 === value1 ? null + : value0 === value00 && value1 === value10 ? interpolate0 + : interpolate0 = interpolate$$2(value00 = value0, value10 = value1); + }; } -function lab2xyz(t) { - return t > t1 ? t * t * t : t2 * (t - t0); +function styleRemoveEnd(name) { + return function() { + this.style.removeProperty(name); + }; } -function xyz2rgb(x) { - return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055); +function styleConstant$1(name, interpolate$$2, value1) { + var value00, + interpolate0; + return function() { + var value0 = window(this).getComputedStyle(this, null).getPropertyValue(name); + return value0 === value1 ? null + : value0 === value00 ? interpolate0 + : interpolate0 = interpolate$$2(value00 = value0, value1); + }; } -function rgb2xyz(x) { - return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4); +function styleFunction$1(name, interpolate$$2, value) { + var value00, + value10, + interpolate0; + return function() { + var style = window(this).getComputedStyle(this, null), + value0 = style.getPropertyValue(name), + value1 = value(this); + if (value1 == null) value1 = (this.style.removeProperty(name), style.getPropertyValue(name)); + return value0 === value1 ? null + : value0 === value00 && value1 === value10 ? interpolate0 + : interpolate0 = interpolate$$2(value00 = value0, value10 = value1); + }; } -function hclConvert(o) { - if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity); - if (!(o instanceof Lab)) o = labConvert(o); - var h = Math.atan2(o.b, o.a) * rad2deg; - return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity); +var transition_style = function(name, value, priority) { + var i = (name += "") === "transform" ? interpolateTransformCss : interpolate$$1; + return value == null ? this + .styleTween(name, styleRemove$1(name, i)) + .on("end.style." + name, styleRemoveEnd(name)) + : this.styleTween(name, typeof value === "function" + ? styleFunction$1(name, i, tweenValue(this, "style." + name, value)) + : styleConstant$1(name, i, value + ""), priority); +}; + +function styleTween(name, value, priority) { + function tween() { + var node = this, i = value.apply(node, arguments); + return i && function(t) { + node.style.setProperty(name, i(t), priority); + }; + } + tween._value = value; + return tween; } -function hcl(h, c, l, opacity) { - return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity); +var transition_styleTween = function(name, value, priority) { + var key = "style." + (name += ""); + if (arguments.length < 2) return (key = this.tween(key)) && key._value; + if (value == null) return this.tween(key, null); + if (typeof value !== "function") throw new Error; + return this.tween(key, styleTween(name, value, priority == null ? "" : priority)); +}; + +function textConstant$1(value) { + return function() { + this.textContent = value; + }; } -function Hcl(h, c, l, opacity) { - this.h = +h; - this.c = +c; - this.l = +l; - this.opacity = +opacity; +function textFunction$1(value) { + return function() { + var value1 = value(this); + this.textContent = value1 == null ? "" : value1; + }; } -define(Hcl, hcl, extend(Color, { - brighter: function(k) { - return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity); - }, - darker: function(k) { - return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity); - }, - rgb: function() { - return labConvert(this).rgb(); +var transition_text = function(value) { + return this.tween("text", typeof value === "function" + ? textFunction$1(tweenValue(this, "text", value)) + : textConstant$1(value == null ? "" : value + "")); +}; + +var transition_transition = function() { + var name = this._name, + id0 = this._id, + id1 = newId(); + + for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) { + for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) { + if (node = group[i]) { + var inherit = get$1(node, id0); + schedule(node, name, id1, i, group, { + time: inherit.time + inherit.delay + inherit.duration, + delay: 0, + duration: inherit.duration, + ease: inherit.ease + }); + } + } } -})); -var A = -0.14861; -var B = +1.78277; -var C = -0.29227; -var D = -0.90649; -var E = +1.97294; -var ED = E * D; -var EB = E * B; -var BC_DA = B * C - D * A; + return new Transition(groups, this._parents, name, id1); +}; -function cubehelixConvert(o) { - if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity); - if (!(o instanceof Rgb)) o = rgbConvert(o); - var r = o.r / 255, - g = o.g / 255, - b = o.b / 255, - l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB), - bl = b - l, - k = (E * (g - l) - C * bl) / D, - s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1 - h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN; - return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity); -} +var id = 0; -function cubehelix(h, s, l, opacity) { - return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity); +function Transition(groups, parents, name, id) { + this._groups = groups; + this._parents = parents; + this._name = name; + this._id = id; } -function Cubehelix(h, s, l, opacity) { - this.h = +h; - this.s = +s; - this.l = +l; - this.opacity = +opacity; +function transition(name) { + return selection().transition(name); } -define(Cubehelix, cubehelix, extend(Color, { - brighter: function(k) { - k = k == null ? brighter : Math.pow(brighter, k); - return new Cubehelix(this.h, this.s, this.l * k, this.opacity); - }, - darker: function(k) { - k = k == null ? darker : Math.pow(darker, k); - return new Cubehelix(this.h, this.s, this.l * k, this.opacity); - }, - rgb: function() { - var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad, - l = +this.l, - a = isNaN(this.s) ? 0 : this.s * l * (1 - l), - cosh = Math.cos(h), - sinh = Math.sin(h); - return new Rgb( - 255 * (l + a * (A * cosh + B * sinh)), - 255 * (l + a * (C * cosh + D * sinh)), - 255 * (l + a * (E * cosh)), - this.opacity - ); - } -})); - -function basis$1(t1, v0, v1, v2, v3) { - var t2 = t1 * t1, t3 = t2 * t1; - return ((1 - 3 * t1 + 3 * t2 - t3) * v0 - + (4 - 6 * t2 + 3 * t3) * v1 - + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2 - + t3 * v3) / 6; +function newId() { + return ++id; } -var basis$2 = function(values) { - var n = values.length - 1; - return function(t) { - var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n), - v1 = values[i], - v2 = values[i + 1], - v0 = i > 0 ? values[i - 1] : 2 * v1 - v2, - v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1; - return basis$1((t - i / n) * n, v0, v1, v2, v3); - }; -}; - -var basisClosed$1 = function(values) { - var n = values.length; - return function(t) { - var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n), - v0 = values[(i + n - 1) % n], - v1 = values[i % n], - v2 = values[(i + 1) % n], - v3 = values[(i + 2) % n]; - return basis$1((t - i / n) * n, v0, v1, v2, v3); - }; -}; +var selection_prototype = selection.prototype; -var constant$3 = function(x) { - return function() { - return x; - }; +Transition.prototype = transition.prototype = { + constructor: Transition, + select: transition_select, + selectAll: transition_selectAll, + filter: transition_filter, + merge: transition_merge, + selection: transition_selection, + transition: transition_transition, + call: selection_prototype.call, + nodes: selection_prototype.nodes, + node: selection_prototype.node, + size: selection_prototype.size, + empty: selection_prototype.empty, + each: selection_prototype.each, + on: transition_on, + attr: transition_attr, + attrTween: transition_attrTween, + style: transition_style, + styleTween: transition_styleTween, + text: transition_text, + remove: transition_remove, + tween: transition_tween, + delay: transition_delay, + duration: transition_duration, + ease: transition_ease }; -function linear$1(a, d) { - return function(t) { - return a + t * d; - }; -} - -function exponential$1(a, b, y) { - return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) { - return Math.pow(a + t * b, y); - }; +function linear$1(t) { + return +t; } -function hue(a, b) { - var d = b - a; - return d ? linear$1(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$3(isNaN(a) ? b : a); +function quadIn(t) { + return t * t; } -function gamma(y) { - return (y = +y) === 1 ? nogamma : function(a, b) { - return b - a ? exponential$1(a, b, y) : constant$3(isNaN(a) ? b : a); - }; +function quadOut(t) { + return t * (2 - t); } -function nogamma(a, b) { - var d = b - a; - return d ? linear$1(a, d) : constant$3(isNaN(a) ? b : a); +function quadInOut(t) { + return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2; } -var interpolateRgb = (function rgbGamma(y) { - var color$$1 = gamma(y); +function cubicIn(t) { + return t * t * t; +} - function rgb$$1(start, end) { - var r = color$$1((start = rgb(start)).r, (end = rgb(end)).r), - g = color$$1(start.g, end.g), - b = color$$1(start.b, end.b), - opacity = color$$1(start.opacity, end.opacity); - return function(t) { - start.r = r(t); - start.g = g(t); - start.b = b(t); - start.opacity = opacity(t); - return start + ""; - }; - } +function cubicOut(t) { + return --t * t * t + 1; +} - rgb$$1.gamma = rgbGamma; +function cubicInOut(t) { + return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2; +} - return rgb$$1; -})(1); +var exponent = 3; -function rgbSpline(spline) { - return function(colors) { - var n = colors.length, - r = new Array(n), - g = new Array(n), - b = new Array(n), - i, color$$1; - for (i = 0; i < n; ++i) { - color$$1 = rgb(colors[i]); - r[i] = color$$1.r || 0; - g[i] = color$$1.g || 0; - b[i] = color$$1.b || 0; - } - r = spline(r); - g = spline(g); - b = spline(b); - color$$1.opacity = 1; - return function(t) { - color$$1.r = r(t); - color$$1.g = g(t); - color$$1.b = b(t); - return color$$1 + ""; - }; - }; -} +var polyIn = (function custom(e) { + e = +e; -var rgbBasis = rgbSpline(basis$2); -var rgbBasisClosed = rgbSpline(basisClosed$1); + function polyIn(t) { + return Math.pow(t, e); + } -var array$1 = function(a, b) { - var nb = b ? b.length : 0, - na = a ? Math.min(nb, a.length) : 0, - x = new Array(nb), - c = new Array(nb), - i; + polyIn.exponent = custom; - for (i = 0; i < na; ++i) x[i] = interpolate(a[i], b[i]); - for (; i < nb; ++i) c[i] = b[i]; + return polyIn; +})(exponent); - return function(t) { - for (i = 0; i < na; ++i) c[i] = x[i](t); - return c; - }; -}; +var polyOut = (function custom(e) { + e = +e; -var date = function(a, b) { - var d = new Date; - return a = +a, b -= a, function(t) { - return d.setTime(a + b * t), d; - }; -}; + function polyOut(t) { + return 1 - Math.pow(1 - t, e); + } -var interpolateNumber = function(a, b) { - return a = +a, b -= a, function(t) { - return a + b * t; - }; -}; + polyOut.exponent = custom; -var object = function(a, b) { - var i = {}, - c = {}, - k; + return polyOut; +})(exponent); - if (a === null || typeof a !== "object") a = {}; - if (b === null || typeof b !== "object") b = {}; +var polyInOut = (function custom(e) { + e = +e; - for (k in b) { - if (k in a) { - i[k] = interpolate(a[k], b[k]); - } else { - c[k] = b[k]; - } + function polyInOut(t) { + return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2; } - return function(t) { - for (k in i) c[k] = i[k](t); - return c; - }; -}; + polyInOut.exponent = custom; -var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g; -var reB = new RegExp(reA.source, "g"); + return polyInOut; +})(exponent); -function zero(b) { - return function() { - return b; - }; -} +var pi = Math.PI; +var halfPi = pi / 2; -function one(b) { - return function(t) { - return b(t) + ""; - }; +function sinIn(t) { + return 1 - Math.cos(t * halfPi); } -var interpolateString = function(a, b) { - var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b - am, // current match in a - bm, // current match in b - bs, // string preceding current number in b, if any - i = -1, // index in s - s = [], // string constants and placeholders - q = []; // number interpolators - - // Coerce inputs to strings. - a = a + "", b = b + ""; - - // Interpolate pairs of numbers in a & b. - while ((am = reA.exec(a)) - && (bm = reB.exec(b))) { - if ((bs = bm.index) > bi) { // a string precedes the next number in b - bs = b.slice(bi, bs); - if (s[i]) s[i] += bs; // coalesce with previous string - else s[++i] = bs; - } - if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match - if (s[i]) s[i] += bm; // coalesce with previous string - else s[++i] = bm; - } else { // interpolate non-matching numbers - s[++i] = null; - q.push({i: i, x: interpolateNumber(am, bm)}); - } - bi = reB.lastIndex; - } - - // Add remains of b. - if (bi < b.length) { - bs = b.slice(bi); - if (s[i]) s[i] += bs; // coalesce with previous string - else s[++i] = bs; - } +function sinOut(t) { + return Math.sin(t * halfPi); +} - // Special optimization for only a single match. - // Otherwise, interpolate each of the numbers and rejoin the string. - return s.length < 2 ? (q[0] - ? one(q[0].x) - : zero(b)) - : (b = q.length, function(t) { - for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t); - return s.join(""); - }); -}; +function sinInOut(t) { + return (1 - Math.cos(pi * t)) / 2; +} -var interpolate = function(a, b) { - var t = typeof b, c; - return b == null || t === "boolean" ? constant$3(b) - : (t === "number" ? interpolateNumber - : t === "string" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString) - : b instanceof color ? interpolateRgb - : b instanceof Date ? date - : Array.isArray(b) ? array$1 - : isNaN(b) ? object - : interpolateNumber)(a, b); -}; +function expIn(t) { + return Math.pow(2, 10 * t - 10); +} -var interpolateRound = function(a, b) { - return a = +a, b -= a, function(t) { - return Math.round(a + b * t); - }; -}; +function expOut(t) { + return 1 - Math.pow(2, -10 * t); +} -var degrees = 180 / Math.PI; +function expInOut(t) { + return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2; +} -var identity$2 = { - translateX: 0, - translateY: 0, - rotate: 0, - skewX: 0, - scaleX: 1, - scaleY: 1 -}; +function circleIn(t) { + return 1 - Math.sqrt(1 - t * t); +} -var decompose = function(a, b, c, d, e, f) { - var scaleX, scaleY, skewX; - if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX; - if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX; - if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY; - if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX; - return { - translateX: e, - translateY: f, - rotate: Math.atan2(b, a) * degrees, - skewX: Math.atan(skewX) * degrees, - scaleX: scaleX, - scaleY: scaleY - }; -}; +function circleOut(t) { + return Math.sqrt(1 - --t * t); +} -var cssNode; -var cssRoot; -var cssView; -var svgNode; +function circleInOut(t) { + return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2; +} -function parseCss(value) { - if (value === "none") return identity$2; - if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView; - cssNode.style.transform = value; - value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform"); - cssRoot.removeChild(cssNode); - value = value.slice(7, -1).split(","); - return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]); +var b1 = 4 / 11; +var b2 = 6 / 11; +var b3 = 8 / 11; +var b4 = 3 / 4; +var b5 = 9 / 11; +var b6 = 10 / 11; +var b7 = 15 / 16; +var b8 = 21 / 22; +var b9 = 63 / 64; +var b0 = 1 / b1 / b1; + +function bounceIn(t) { + return 1 - bounceOut(1 - t); } -function parseSvg(value) { - if (value == null) return identity$2; - if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g"); - svgNode.setAttribute("transform", value); - if (!(value = svgNode.transform.baseVal.consolidate())) return identity$2; - value = value.matrix; - return decompose(value.a, value.b, value.c, value.d, value.e, value.f); +function bounceOut(t) { + return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9; } -function interpolateTransform(parse, pxComma, pxParen, degParen) { +function bounceInOut(t) { + return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2; +} - function pop(s) { - return s.length ? s.pop() + " " : ""; - } +var overshoot = 1.70158; - function translate(xa, ya, xb, yb, s, q) { - if (xa !== xb || ya !== yb) { - var i = s.push("translate(", null, pxComma, null, pxParen); - q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)}); - } else if (xb || yb) { - s.push("translate(" + xb + pxComma + yb + pxParen); - } - } +var backIn = (function custom(s) { + s = +s; - function rotate(a, b, s, q) { - if (a !== b) { - if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path - q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: interpolateNumber(a, b)}); - } else if (b) { - s.push(pop(s) + "rotate(" + b + degParen); - } + function backIn(t) { + return t * t * ((s + 1) * t - s); } - function skewX(a, b, s, q) { - if (a !== b) { - q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: interpolateNumber(a, b)}); - } else if (b) { - s.push(pop(s) + "skewX(" + b + degParen); - } + backIn.overshoot = custom; + + return backIn; +})(overshoot); + +var backOut = (function custom(s) { + s = +s; + + function backOut(t) { + return --t * t * ((s + 1) * t + s) + 1; } - function scale(xa, ya, xb, yb, s, q) { - if (xa !== xb || ya !== yb) { - var i = s.push(pop(s) + "scale(", null, ",", null, ")"); - q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)}); - } else if (xb !== 1 || yb !== 1) { - s.push(pop(s) + "scale(" + xb + "," + yb + ")"); - } + backOut.overshoot = custom; + + return backOut; +})(overshoot); + +var backInOut = (function custom(s) { + s = +s; + + function backInOut(t) { + return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2; } - return function(a, b) { - var s = [], // string constants and placeholders - q = []; // number interpolators - a = parse(a), b = parse(b); - translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q); - rotate(a.rotate, b.rotate, s, q); - skewX(a.skewX, b.skewX, s, q); - scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q); - a = b = null; // gc - return function(t) { - var i = -1, n = q.length, o; - while (++i < n) s[(o = q[i]).i] = o.x(t); - return s.join(""); - }; - }; -} + backInOut.overshoot = custom; -var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)"); -var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")"); + return backInOut; +})(overshoot); -var rho = Math.SQRT2; -var rho2 = 2; -var rho4 = 4; -var epsilon2 = 1e-12; +var tau = 2 * Math.PI; +var amplitude = 1; +var period = 0.3; -function cosh(x) { - return ((x = Math.exp(x)) + 1 / x) / 2; -} +var elasticIn = (function custom(a, p) { + var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau); -function sinh(x) { - return ((x = Math.exp(x)) - 1 / x) / 2; -} + function elasticIn(t) { + return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p); + } -function tanh(x) { - return ((x = Math.exp(2 * x)) - 1) / (x + 1); -} + elasticIn.amplitude = function(a) { return custom(a, p * tau); }; + elasticIn.period = function(p) { return custom(a, p); }; -// p0 = [ux0, uy0, w0] -// p1 = [ux1, uy1, w1] -var interpolateZoom = function(p0, p1) { - var ux0 = p0[0], uy0 = p0[1], w0 = p0[2], - ux1 = p1[0], uy1 = p1[1], w1 = p1[2], - dx = ux1 - ux0, - dy = uy1 - uy0, - d2 = dx * dx + dy * dy, - i, - S; + return elasticIn; +})(amplitude, period); - // Special case for u0 ≅ u1. - if (d2 < epsilon2) { - S = Math.log(w1 / w0) / rho; - i = function(t) { - return [ - ux0 + t * dx, - uy0 + t * dy, - w0 * Math.exp(rho * t * S) - ]; - }; +var elasticOut = (function custom(a, p) { + var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau); + + function elasticOut(t) { + return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p); } - // General case. - else { - var d1 = Math.sqrt(d2), - b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1), - b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1), - r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0), - r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1); - S = (r1 - r0) / rho; - i = function(t) { - var s = t * S, - coshr0 = cosh(r0), - u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0)); - return [ - ux0 + u * dx, - uy0 + u * dy, - w0 * coshr0 / cosh(rho * s + r0) - ]; - }; + elasticOut.amplitude = function(a) { return custom(a, p * tau); }; + elasticOut.period = function(p) { return custom(a, p); }; + + return elasticOut; +})(amplitude, period); + +var elasticInOut = (function custom(a, p) { + var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau); + + function elasticInOut(t) { + return ((t = t * 2 - 1) < 0 + ? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p) + : 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2; } - i.duration = S * 1000; + elasticInOut.amplitude = function(a) { return custom(a, p * tau); }; + elasticInOut.period = function(p) { return custom(a, p); }; - return i; + return elasticInOut; +})(amplitude, period); + +var defaultTiming = { + time: null, // Set on use. + delay: 0, + duration: 250, + ease: cubicInOut }; -function hsl$1(hue$$1) { - return function(start, end) { - var h = hue$$1((start = hsl(start)).h, (end = hsl(end)).h), - s = nogamma(start.s, end.s), - l = nogamma(start.l, end.l), - opacity = nogamma(start.opacity, end.opacity); - return function(t) { - start.h = h(t); - start.s = s(t); - start.l = l(t); - start.opacity = opacity(t); - return start + ""; - }; +function inherit(node, id) { + var timing; + while (!(timing = node.__transition) || !(timing = timing[id])) { + if (!(node = node.parentNode)) { + return defaultTiming.time = now(), defaultTiming; + } } + return timing; } -var hsl$2 = hsl$1(hue); -var hslLong = hsl$1(nogamma); +var selection_transition = function(name) { + var id, + timing; -function lab$1(start, end) { - var l = nogamma((start = lab(start)).l, (end = lab(end)).l), - a = nogamma(start.a, end.a), - b = nogamma(start.b, end.b), - opacity = nogamma(start.opacity, end.opacity); - return function(t) { - start.l = l(t); - start.a = a(t); - start.b = b(t); - start.opacity = opacity(t); - return start + ""; + if (name instanceof Transition) { + id = name._id, name = name._name; + } else { + id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + ""; + } + + for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) { + for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) { + if (node = group[i]) { + schedule(node, name, id, i, group, timing || inherit(node, id)); + } + } + } + + return new Transition(groups, this._parents, name, id); +}; + +selection.prototype.interrupt = selection_interrupt; +selection.prototype.transition = selection_transition; + +var root$1 = [null]; + +var active = function(node, name) { + var schedules = node.__transition, + schedule, + i; + + if (schedules) { + name = name == null ? null : name + ""; + for (i in schedules) { + if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) { + return new Transition([[node]], root$1, name, +i); + } + } + } + + return null; +}; + +var constant$4 = function(x) { + return function() { + return x; }; -} +}; -function hcl$1(hue$$1) { - return function(start, end) { - var h = hue$$1((start = hcl(start)).h, (end = hcl(end)).h), - c = nogamma(start.c, end.c), - l = nogamma(start.l, end.l), - opacity = nogamma(start.opacity, end.opacity); - return function(t) { - start.h = h(t); - start.c = c(t); - start.l = l(t); - start.opacity = opacity(t); - return start + ""; - }; - } +var BrushEvent = function(target, type, selection) { + this.target = target; + this.type = type; + this.selection = selection; +}; + +function nopropagation$1() { + exports.event.stopImmediatePropagation(); } -var hcl$2 = hcl$1(hue); -var hclLong = hcl$1(nogamma); +var noevent$1 = function() { + exports.event.preventDefault(); + exports.event.stopImmediatePropagation(); +}; -function cubehelix$1(hue$$1) { - return (function cubehelixGamma(y) { - y = +y; +var MODE_DRAG = {name: "drag"}; +var MODE_SPACE = {name: "space"}; +var MODE_HANDLE = {name: "handle"}; +var MODE_CENTER = {name: "center"}; - function cubehelix$$1(start, end) { - var h = hue$$1((start = cubehelix(start)).h, (end = cubehelix(end)).h), - s = nogamma(start.s, end.s), - l = nogamma(start.l, end.l), - opacity = nogamma(start.opacity, end.opacity); - return function(t) { - start.h = h(t); - start.s = s(t); - start.l = l(Math.pow(t, y)); - start.opacity = opacity(t); - return start + ""; - }; - } +var X = { + name: "x", + handles: ["e", "w"].map(type), + input: function(x, e) { return x && [[x[0], e[0][1]], [x[1], e[1][1]]]; }, + output: function(xy) { return xy && [xy[0][0], xy[1][0]]; } +}; - cubehelix$$1.gamma = cubehelixGamma; +var Y = { + name: "y", + handles: ["n", "s"].map(type), + input: function(y, e) { return y && [[e[0][0], y[0]], [e[1][0], y[1]]]; }, + output: function(xy) { return xy && [xy[0][1], xy[1][1]]; } +}; - return cubehelix$$1; - })(1); -} +var XY = { + name: "xy", + handles: ["n", "e", "s", "w", "nw", "ne", "se", "sw"].map(type), + input: function(xy) { return xy; }, + output: function(xy) { return xy; } +}; -var cubehelix$2 = cubehelix$1(hue); -var cubehelixLong = cubehelix$1(nogamma); +var cursors = { + overlay: "crosshair", + selection: "move", + n: "ns-resize", + e: "ew-resize", + s: "ns-resize", + w: "ew-resize", + nw: "nwse-resize", + ne: "nesw-resize", + se: "nwse-resize", + sw: "nesw-resize" +}; -var quantize = function(interpolator, n) { - var samples = new Array(n); - for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1)); - return samples; +var flipX = { + e: "w", + w: "e", + nw: "ne", + ne: "nw", + se: "sw", + sw: "se" }; -var noop$1 = {value: function() {}}; +var flipY = { + n: "s", + s: "n", + nw: "sw", + ne: "se", + se: "ne", + sw: "nw" +}; -function dispatch() { - for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) { - if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t); - _[t] = []; - } - return new Dispatch(_); -} +var signsX = { + overlay: +1, + selection: +1, + n: null, + e: +1, + s: null, + w: -1, + nw: -1, + ne: +1, + se: +1, + sw: -1 +}; -function Dispatch(_) { - this._ = _; -} +var signsY = { + overlay: +1, + selection: +1, + n: -1, + e: null, + s: +1, + w: null, + nw: -1, + ne: -1, + se: +1, + sw: +1 +}; -function parseTypenames(typenames, types) { - return typenames.trim().split(/^|\s+/).map(function(t) { - var name = "", i = t.indexOf("."); - if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i); - if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t); - return {type: t, name: name}; - }); +function type(t) { + return {type: t}; } -Dispatch.prototype = dispatch.prototype = { - constructor: Dispatch, - on: function(typename, callback) { - var _ = this._, - T = parseTypenames(typename + "", _), - t, - i = -1, - n = T.length; - - // If no callback was specified, return the callback of the given type and name. - if (arguments.length < 2) { - while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t; - return; - } +// Ignore right-click, since that should open the context menu. +function defaultFilter() { + return !exports.event.button; +} - // If a type was specified, set the callback for the given type and name. - // Otherwise, if a null callback was specified, remove callbacks of the given name. - if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback); - while (++i < n) { - if (t = (typename = T[i]).type) _[t] = set$2(_[t], typename.name, callback); - else if (callback == null) for (t in _) _[t] = set$2(_[t], typename.name, null); - } +function defaultExtent() { + var svg = this.ownerSVGElement || this; + return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]]; +} - return this; - }, - copy: function() { - var copy = {}, _ = this._; - for (var t in _) copy[t] = _[t].slice(); - return new Dispatch(copy); - }, - call: function(type, that) { - if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2]; - if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type); - for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args); - }, - apply: function(type, that, args) { - if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type); - for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args); - } -}; +// Like d3.local, but with the name “__brush” rather than auto-generated. +function local$$1(node) { + while (!node.__brush) if (!(node = node.parentNode)) return; + return node.__brush; +} -function get(type, name) { - for (var i = 0, n = type.length, c; i < n; ++i) { - if ((c = type[i]).name === name) { - return c.value; - } - } +function empty(extent) { + return extent[0][0] === extent[1][0] + || extent[0][1] === extent[1][1]; } -function set$2(type, name, callback) { - for (var i = 0, n = type.length; i < n; ++i) { - if (type[i].name === name) { - type[i] = noop$1, type = type.slice(0, i).concat(type.slice(i + 1)); - break; - } - } - if (callback != null) type.push({name: name, value: callback}); - return type; +function brushSelection(node) { + var state = node.__brush; + return state ? state.dim.output(state.selection) : null; } -function objectConverter(columns) { - return new Function("d", "return {" + columns.map(function(name, i) { - return JSON.stringify(name) + ": d[" + i + "]"; - }).join(",") + "}"); +function brushX() { + return brush$1(X); } -function customConverter(columns, f) { - var object = objectConverter(columns); - return function(row, i) { - return f(object(row), i, columns); - }; +function brushY() { + return brush$1(Y); } -// Compute unique columns in order of discovery. -function inferColumns(rows) { - var columnSet = Object.create(null), - columns = []; +var brush = function() { + return brush$1(XY); +}; + +function brush$1(dim) { + var extent = defaultExtent, + filter = defaultFilter, + listeners = dispatch(brush, "start", "brush", "end"), + handleSize = 6, + touchending; + + function brush(group) { + var overlay = group + .property("__brush", initialize) + .selectAll(".overlay") + .data([type("overlay")]); + + overlay.enter().append("rect") + .attr("class", "overlay") + .attr("pointer-events", "all") + .attr("cursor", cursors.overlay) + .merge(overlay) + .each(function() { + var extent = local$$1(this).extent; + select(this) + .attr("x", extent[0][0]) + .attr("y", extent[0][1]) + .attr("width", extent[1][0] - extent[0][0]) + .attr("height", extent[1][1] - extent[0][1]); + }); + + group.selectAll(".selection") + .data([type("selection")]) + .enter().append("rect") + .attr("class", "selection") + .attr("cursor", cursors.selection) + .attr("fill", "#777") + .attr("fill-opacity", 0.3) + .attr("stroke", "#fff") + .attr("shape-rendering", "crispEdges"); - rows.forEach(function(row) { - for (var column in row) { - if (!(column in columnSet)) { - columns.push(columnSet[column] = column); - } - } - }); + var handle = group.selectAll(".handle") + .data(dim.handles, function(d) { return d.type; }); - return columns; -} + handle.exit().remove(); -var dsv = function(delimiter) { - var reFormat = new RegExp("[\"" + delimiter + "\n]"), - delimiterCode = delimiter.charCodeAt(0); + handle.enter().append("rect") + .attr("class", function(d) { return "handle handle--" + d.type; }) + .attr("cursor", function(d) { return cursors[d.type]; }); - function parse(text, f) { - var convert, columns, rows = parseRows(text, function(row, i) { - if (convert) return convert(row, i - 1); - columns = row, convert = f ? customConverter(row, f) : objectConverter(row); - }); - rows.columns = columns; - return rows; + group + .each(redraw) + .attr("fill", "none") + .attr("pointer-events", "all") + .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)") + .on("mousedown.brush touchstart.brush", started); } - function parseRows(text, f) { - var EOL = {}, // sentinel value for end-of-line - EOF = {}, // sentinel value for end-of-file - rows = [], // output rows - N = text.length, - I = 0, // current character index - n = 0, // the current line number - t, // the current token - eol; // is the current token followed by EOL? - - function token() { - if (I >= N) return EOF; // special case: end of file - if (eol) return eol = false, EOL; // special case: end of line + brush.move = function(group, selection$$1) { + if (group.selection) { + group + .on("start.brush", function() { emitter(this, arguments).beforestart().start(); }) + .on("interrupt.brush end.brush", function() { emitter(this, arguments).end(); }) + .tween("brush", function() { + var that = this, + state = that.__brush, + emit = emitter(that, arguments), + selection0 = state.selection, + selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(this, arguments) : selection$$1, state.extent), + i = interpolateValue(selection0, selection1); - // special case: quotes - var j = I, c; - if (text.charCodeAt(j) === 34) { - var i = j; - while (i++ < N) { - if (text.charCodeAt(i) === 34) { - if (text.charCodeAt(i + 1) !== 34) break; - ++i; - } - } - I = i + 2; - c = text.charCodeAt(i + 1); - if (c === 13) { - eol = true; - if (text.charCodeAt(i + 2) === 10) ++I; - } else if (c === 10) { - eol = true; - } - return text.slice(j + 1, i).replace(/""/g, "\""); - } + function tween(t) { + state.selection = t === 1 && empty(selection1) ? null : i(t); + redraw.call(that); + emit.brush(); + } - // common case: find next delimiter or newline - while (I < N) { - var k = 1; - c = text.charCodeAt(I++); - if (c === 10) eol = true; // \n - else if (c === 13) { eol = true; if (text.charCodeAt(I) === 10) ++I, ++k; } // \r|\r\n - else if (c !== delimiterCode) continue; - return text.slice(j, I - k); - } + return selection0 && selection1 ? tween : tween(1); + }); + } else { + group + .each(function() { + var that = this, + args = arguments, + state = that.__brush, + selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(that, args) : selection$$1, state.extent), + emit = emitter(that, args).beforestart(); - // special case: last token before EOF - return text.slice(j); + interrupt(that); + state.selection = selection1 == null || empty(selection1) ? null : selection1; + redraw.call(that); + emit.start().brush().end(); + }); } + }; - while ((t = token()) !== EOF) { - var a = []; - while (t !== EOL && t !== EOF) { - a.push(t); - t = token(); - } - if (f && (a = f(a, n++)) == null) continue; - rows.push(a); - } + function redraw() { + var group = select(this), + selection$$1 = local$$1(this).selection; - return rows; - } + if (selection$$1) { + group.selectAll(".selection") + .style("display", null) + .attr("x", selection$$1[0][0]) + .attr("y", selection$$1[0][1]) + .attr("width", selection$$1[1][0] - selection$$1[0][0]) + .attr("height", selection$$1[1][1] - selection$$1[0][1]); - function format(rows, columns) { - if (columns == null) columns = inferColumns(rows); - return [columns.map(formatValue).join(delimiter)].concat(rows.map(function(row) { - return columns.map(function(column) { - return formatValue(row[column]); - }).join(delimiter); - })).join("\n"); - } + group.selectAll(".handle") + .style("display", null) + .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection$$1[1][0] - handleSize / 2 : selection$$1[0][0] - handleSize / 2; }) + .attr("y", function(d) { return d.type[0] === "s" ? selection$$1[1][1] - handleSize / 2 : selection$$1[0][1] - handleSize / 2; }) + .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection$$1[1][0] - selection$$1[0][0] + handleSize : handleSize; }) + .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection$$1[1][1] - selection$$1[0][1] + handleSize : handleSize; }); + } - function formatRows(rows) { - return rows.map(formatRow).join("\n"); + else { + group.selectAll(".selection,.handle") + .style("display", "none") + .attr("x", null) + .attr("y", null) + .attr("width", null) + .attr("height", null); + } } - function formatRow(row) { - return row.map(formatValue).join(delimiter); + function emitter(that, args) { + return that.__brush.emitter || new Emitter(that, args); } - function formatValue(text) { - return text == null ? "" - : reFormat.test(text += "") ? "\"" + text.replace(/\"/g, "\"\"") + "\"" - : text; + function Emitter(that, args) { + this.that = that; + this.args = args; + this.state = that.__brush; + this.active = 0; } - return { - parse: parse, - parseRows: parseRows, - format: format, - formatRows: formatRows + Emitter.prototype = { + beforestart: function() { + if (++this.active === 1) this.state.emitter = this, this.starting = true; + return this; + }, + start: function() { + if (this.starting) this.starting = false, this.emit("start"); + return this; + }, + brush: function() { + this.emit("brush"); + return this; + }, + end: function() { + if (--this.active === 0) delete this.state.emitter, this.emit("end"); + return this; + }, + emit: function(type) { + customEvent(new BrushEvent(brush, type, dim.output(this.state.selection)), listeners.apply, listeners, [type, this.that, this.args]); + } }; -}; -var csv = dsv(","); - -var csvParse = csv.parse; -var csvParseRows = csv.parseRows; -var csvFormat = csv.format; -var csvFormatRows = csv.formatRows; + function started() { + if (exports.event.touches) { if (exports.event.changedTouches.length < exports.event.touches.length) return noevent$1(); } + else if (touchending) return; + if (!filter.apply(this, arguments)) return; -var tsv = dsv("\t"); + var that = this, + type = exports.event.target.__data__.type, + mode = (exports.event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (exports.event.altKey ? MODE_CENTER : MODE_HANDLE), + signX = dim === Y ? null : signsX[type], + signY = dim === X ? null : signsY[type], + state = local$$1(that), + extent = state.extent, + selection$$1 = state.selection, + W = extent[0][0], w0, w1, + N = extent[0][1], n0, n1, + E = extent[1][0], e0, e1, + S = extent[1][1], s0, s1, + dx, + dy, + moving, + shifting = signX && signY && exports.event.shiftKey, + lockX, + lockY, + point0 = mouse(that), + point = point0, + emit = emitter(that, arguments).beforestart(); -var tsvParse = tsv.parse; -var tsvParseRows = tsv.parseRows; -var tsvFormat = tsv.format; -var tsvFormatRows = tsv.formatRows; + if (type === "overlay") { + state.selection = selection$$1 = [ + [w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]], + [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0] + ]; + } else { + w0 = selection$$1[0][0]; + n0 = selection$$1[0][1]; + e0 = selection$$1[1][0]; + s0 = selection$$1[1][1]; + } -var request = function(url, callback) { - var request, - event = dispatch("beforesend", "progress", "load", "error"), - mimeType, - headers = map$1(), - xhr = new XMLHttpRequest, - user = null, - password = null, - response, - responseType, - timeout = 0; + w1 = w0; + n1 = n0; + e1 = e0; + s1 = s0; - // If IE does not support CORS, use XDomainRequest. - if (typeof XDomainRequest !== "undefined" - && !("withCredentials" in xhr) - && /^(http(s)?:)?\/\//.test(url)) xhr = new XDomainRequest; + var group = select(that) + .attr("pointer-events", "none"); - "onload" in xhr - ? xhr.onload = xhr.onerror = xhr.ontimeout = respond - : xhr.onreadystatechange = function(o) { xhr.readyState > 3 && respond(o); }; + var overlay = group.selectAll(".overlay") + .attr("cursor", cursors[type]); - function respond(o) { - var status = xhr.status, result; - if (!status && hasResponse(xhr) - || status >= 200 && status < 300 - || status === 304) { - if (response) { - try { - result = response.call(request, xhr); - } catch (e) { - event.call("error", request, e); - return; - } - } else { - result = xhr; - } - event.call("load", request, result); + if (exports.event.touches) { + group + .on("touchmove.brush", moved, true) + .on("touchend.brush touchcancel.brush", ended, true); } else { - event.call("error", request, o); - } - } + var view = select(exports.event.view) + .on("keydown.brush", keydowned, true) + .on("keyup.brush", keyupped, true) + .on("mousemove.brush", moved, true) + .on("mouseup.brush", ended, true); - xhr.onprogress = function(e) { - event.call("progress", request, e); - }; + dragDisable(exports.event.view); + } - request = { - header: function(name, value) { - name = (name + "").toLowerCase(); - if (arguments.length < 2) return headers.get(name); - if (value == null) headers.remove(name); - else headers.set(name, value + ""); - return request; - }, + nopropagation$1(); + interrupt(that); + redraw.call(that); + emit.start(); - // If mimeType is non-null and no Accept header is set, a default is used. - mimeType: function(value) { - if (!arguments.length) return mimeType; - mimeType = value == null ? null : value + ""; - return request; - }, + function moved() { + var point1 = mouse(that); + if (shifting && !lockX && !lockY) { + if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true; + else lockX = true; + } + point = point1; + moving = true; + noevent$1(); + move(); + } - // Specifies what type the response value should take; - // for instance, arraybuffer, blob, document, or text. - responseType: function(value) { - if (!arguments.length) return responseType; - responseType = value; - return request; - }, + function move() { + var t; - timeout: function(value) { - if (!arguments.length) return timeout; - timeout = +value; - return request; - }, + dx = point[0] - point0[0]; + dy = point[1] - point0[1]; - user: function(value) { - return arguments.length < 1 ? user : (user = value == null ? null : value + "", request); - }, + switch (mode) { + case MODE_SPACE: + case MODE_DRAG: { + if (signX) dx = Math.max(W - w0, Math.min(E - e0, dx)), w1 = w0 + dx, e1 = e0 + dx; + if (signY) dy = Math.max(N - n0, Math.min(S - s0, dy)), n1 = n0 + dy, s1 = s0 + dy; + break; + } + case MODE_HANDLE: { + if (signX < 0) dx = Math.max(W - w0, Math.min(E - w0, dx)), w1 = w0 + dx, e1 = e0; + else if (signX > 0) dx = Math.max(W - e0, Math.min(E - e0, dx)), w1 = w0, e1 = e0 + dx; + if (signY < 0) dy = Math.max(N - n0, Math.min(S - n0, dy)), n1 = n0 + dy, s1 = s0; + else if (signY > 0) dy = Math.max(N - s0, Math.min(S - s0, dy)), n1 = n0, s1 = s0 + dy; + break; + } + case MODE_CENTER: { + if (signX) w1 = Math.max(W, Math.min(E, w0 - dx * signX)), e1 = Math.max(W, Math.min(E, e0 + dx * signX)); + if (signY) n1 = Math.max(N, Math.min(S, n0 - dy * signY)), s1 = Math.max(N, Math.min(S, s0 + dy * signY)); + break; + } + } - password: function(value) { - return arguments.length < 1 ? password : (password = value == null ? null : value + "", request); - }, + if (e1 < w1) { + signX *= -1; + t = w0, w0 = e0, e0 = t; + t = w1, w1 = e1, e1 = t; + if (type in flipX) overlay.attr("cursor", cursors[type = flipX[type]]); + } - // Specify how to convert the response content to a specific type; - // changes the callback value on "load" events. - response: function(value) { - response = value; - return request; - }, + if (s1 < n1) { + signY *= -1; + t = n0, n0 = s0, s0 = t; + t = n1, n1 = s1, s1 = t; + if (type in flipY) overlay.attr("cursor", cursors[type = flipY[type]]); + } - // Alias for send("GET", …). - get: function(data, callback) { - return request.send("GET", data, callback); - }, + if (state.selection) selection$$1 = state.selection; // May be set by brush.move! + if (lockX) w1 = selection$$1[0][0], e1 = selection$$1[1][0]; + if (lockY) n1 = selection$$1[0][1], s1 = selection$$1[1][1]; - // Alias for send("POST", …). - post: function(data, callback) { - return request.send("POST", data, callback); - }, + if (selection$$1[0][0] !== w1 + || selection$$1[0][1] !== n1 + || selection$$1[1][0] !== e1 + || selection$$1[1][1] !== s1) { + state.selection = [[w1, n1], [e1, s1]]; + redraw.call(that); + emit.brush(); + } + } - // If callback is non-null, it will be used for error and load events. - send: function(method, data, callback) { - xhr.open(method, url, true, user, password); - if (mimeType != null && !headers.has("accept")) headers.set("accept", mimeType + ",*/*"); - if (xhr.setRequestHeader) headers.each(function(value, name) { xhr.setRequestHeader(name, value); }); - if (mimeType != null && xhr.overrideMimeType) xhr.overrideMimeType(mimeType); - if (responseType != null) xhr.responseType = responseType; - if (timeout > 0) xhr.timeout = timeout; - if (callback == null && typeof data === "function") callback = data, data = null; - if (callback != null && callback.length === 1) callback = fixCallback(callback); - if (callback != null) request.on("error", callback).on("load", function(xhr) { callback(null, xhr); }); - event.call("beforesend", request, xhr); - xhr.send(data == null ? null : data); - return request; - }, + function ended() { + nopropagation$1(); + if (exports.event.touches) { + if (exports.event.touches.length) return; + if (touchending) clearTimeout(touchending); + touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed! + group.on("touchmove.brush touchend.brush touchcancel.brush", null); + } else { + yesdrag(exports.event.view, moving); + view.on("keydown.brush keyup.brush mousemove.brush mouseup.brush", null); + } + group.attr("pointer-events", "all"); + overlay.attr("cursor", cursors.overlay); + if (state.selection) selection$$1 = state.selection; // May be set by brush.move (on start)! + if (empty(selection$$1)) state.selection = null, redraw.call(that); + emit.end(); + } - abort: function() { - xhr.abort(); - return request; - }, + function keydowned() { + switch (exports.event.keyCode) { + case 16: { // SHIFT + shifting = signX && signY; + break; + } + case 18: { // ALT + if (mode === MODE_HANDLE) { + if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX; + if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY; + mode = MODE_CENTER; + move(); + } + break; + } + case 32: { // SPACE; takes priority over ALT + if (mode === MODE_HANDLE || mode === MODE_CENTER) { + if (signX < 0) e0 = e1 - dx; else if (signX > 0) w0 = w1 - dx; + if (signY < 0) s0 = s1 - dy; else if (signY > 0) n0 = n1 - dy; + mode = MODE_SPACE; + overlay.attr("cursor", cursors.selection); + move(); + } + break; + } + default: return; + } + noevent$1(); + } - on: function() { - var value = event.on.apply(event, arguments); - return value === event ? request : value; + function keyupped() { + switch (exports.event.keyCode) { + case 16: { // SHIFT + if (shifting) { + lockX = lockY = shifting = false; + move(); + } + break; + } + case 18: { // ALT + if (mode === MODE_CENTER) { + if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1; + if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1; + mode = MODE_HANDLE; + move(); + } + break; + } + case 32: { // SPACE + if (mode === MODE_SPACE) { + if (exports.event.altKey) { + if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX; + if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY; + mode = MODE_CENTER; + } else { + if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1; + if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1; + mode = MODE_HANDLE; + } + overlay.attr("cursor", cursors[type]); + move(); + } + break; + } + default: return; + } + noevent$1(); } - }; - - if (callback != null) { - if (typeof callback !== "function") throw new Error("invalid callback: " + callback); - return request.get(callback); } - return request; -}; + function initialize() { + var state = this.__brush || {selection: null}; + state.extent = extent.apply(this, arguments); + state.dim = dim; + return state; + } -function fixCallback(callback) { - return function(error, xhr) { - callback(error == null ? xhr : null); + brush.extent = function(_) { + return arguments.length ? (extent = typeof _ === "function" ? _ : constant$4([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), brush) : extent; }; -} - -function hasResponse(xhr) { - var type = xhr.responseType; - return type && type !== "text" - ? xhr.response // null on error - : xhr.responseText; // "" on error -} -var type = function(defaultMimeType, response) { - return function(url, callback) { - var r = request(url).mimeType(defaultMimeType).response(response); - if (callback != null) { - if (typeof callback !== "function") throw new Error("invalid callback: " + callback); - return r.get(callback); - } - return r; + brush.filter = function(_) { + return arguments.length ? (filter = typeof _ === "function" ? _ : constant$4(!!_), brush) : filter; }; -}; - -var html = type("text/html", function(xhr) { - return document.createRange().createContextualFragment(xhr.responseText); -}); - -var json = type("application/json", function(xhr) { - return JSON.parse(xhr.responseText); -}); - -var text = type("text/plain", function(xhr) { - return xhr.responseText; -}); - -var xml = type("application/xml", function(xhr) { - var xml = xhr.responseXML; - if (!xml) throw new Error("parse error"); - return xml; -}); -var dsv$1 = function(defaultMimeType, parse) { - return function(url, row, callback) { - if (arguments.length < 3) callback = row, row = null; - var r = request(url).mimeType(defaultMimeType); - r.row = function(_) { return arguments.length ? r.response(responseOf(parse, row = _)) : row; }; - r.row(row); - return callback ? r.get(callback) : r; + brush.handleSize = function(_) { + return arguments.length ? (handleSize = +_, brush) : handleSize; }; -}; -function responseOf(parse, row) { - return function(request$$1) { - return parse(request$$1.responseText, row); + brush.on = function() { + var value = listeners.on.apply(listeners, arguments); + return value === listeners ? brush : value; }; -} - -var csv$1 = dsv$1("text/csv", csvParse); - -var tsv$1 = dsv$1("text/tab-separated-values", tsvParse); - -var frame = 0; -var timeout = 0; -var interval = 0; -var pokeDelay = 1000; -var taskHead; -var taskTail; -var clockLast = 0; -var clockNow = 0; -var clockSkew = 0; -var clock = typeof performance === "object" && performance.now ? performance : Date; -var setFrame = typeof requestAnimationFrame === "function" ? requestAnimationFrame : function(f) { setTimeout(f, 17); }; - -function now() { - return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew); -} - -function clearNow() { - clockNow = 0; -} -function Timer() { - this._call = - this._time = - this._next = null; + return brush; } -Timer.prototype = timer.prototype = { - constructor: Timer, - restart: function(callback, delay, time) { - if (typeof callback !== "function") throw new TypeError("callback is not a function"); - time = (time == null ? now() : +time) + (delay == null ? 0 : +delay); - if (!this._next && taskTail !== this) { - if (taskTail) taskTail._next = this; - else taskHead = this; - taskTail = this; - } - this._call = callback; - this._time = time; - sleep(); - }, - stop: function() { - if (this._call) { - this._call = null; - this._time = Infinity; - sleep(); - } - } -}; - -function timer(callback, delay, time) { - var t = new Timer; - t.restart(callback, delay, time); - return t; -} +var cos = Math.cos; +var sin = Math.sin; +var pi$1 = Math.PI; +var halfPi$1 = pi$1 / 2; +var tau$1 = pi$1 * 2; +var max$1 = Math.max; -function timerFlush() { - now(); // Get the current time, if not already set. - ++frame; // Pretend we’ve set an alarm, if we haven’t already. - var t = taskHead, e; - while (t) { - if ((e = clockNow - t._time) >= 0) t._call.call(null, e); - t = t._next; - } - --frame; +function compareValue(compare) { + return function(a, b) { + return compare( + a.source.value + a.target.value, + b.source.value + b.target.value + ); + }; } -function wake() { - clockNow = (clockLast = clock.now()) + clockSkew; - frame = timeout = 0; - try { - timerFlush(); - } finally { - frame = 0; - nap(); - clockNow = 0; - } -} +var chord = function() { + var padAngle = 0, + sortGroups = null, + sortSubgroups = null, + sortChords = null; -function poke$1() { - var now = clock.now(), delay = now - clockLast; - if (delay > pokeDelay) clockSkew -= delay, clockLast = now; -} + function chord(matrix) { + var n = matrix.length, + groupSums = [], + groupIndex = sequence(n), + subgroupIndex = [], + chords = [], + groups = chords.groups = new Array(n), + subgroups = new Array(n * n), + k, + x, + x0, + dx, + i, + j; -function nap() { - var t0, t1 = taskHead, t2, time = Infinity; - while (t1) { - if (t1._call) { - if (time > t1._time) time = t1._time; - t0 = t1, t1 = t1._next; - } else { - t2 = t1._next, t1._next = null; - t1 = t0 ? t0._next = t2 : taskHead = t2; + // Compute the sum. + k = 0, i = -1; while (++i < n) { + x = 0, j = -1; while (++j < n) { + x += matrix[i][j]; + } + groupSums.push(x); + subgroupIndex.push(sequence(n)); + k += x; } - } - taskTail = t0; - sleep(time); -} -function sleep(time) { - if (frame) return; // Soonest alarm already set, or will be. - if (timeout) timeout = clearTimeout(timeout); - var delay = time - clockNow; - if (delay > 24) { - if (time < Infinity) timeout = setTimeout(wake, delay); - if (interval) interval = clearInterval(interval); - } else { - if (!interval) interval = setInterval(poke$1, pokeDelay); - frame = 1, setFrame(wake); - } -} + // Sort groups… + if (sortGroups) groupIndex.sort(function(a, b) { + return sortGroups(groupSums[a], groupSums[b]); + }); -var timeout$1 = function(callback, delay, time) { - var t = new Timer; - delay = delay == null ? 0 : +delay; - t.restart(function(elapsed) { - t.stop(); - callback(elapsed + delay); - }, delay, time); - return t; -}; + // Sort subgroups… + if (sortSubgroups) subgroupIndex.forEach(function(d, i) { + d.sort(function(a, b) { + return sortSubgroups(matrix[i][a], matrix[i][b]); + }); + }); -var interval$1 = function(callback, delay, time) { - var t = new Timer, total = delay; - if (delay == null) return t.restart(callback, delay, time), t; - delay = +delay, time = time == null ? now() : +time; - t.restart(function tick(elapsed) { - elapsed += total; - t.restart(tick, total += delay, time); - callback(elapsed); - }, delay, time); - return t; -}; + // Convert the sum to scaling factor for [0, 2pi]. + // TODO Allow start and end angle to be specified? + // TODO Allow padding to be specified as percentage? + k = max$1(0, tau$1 - padAngle * n) / k; + dx = k ? padAngle : tau$1 / n; -var t0$1 = new Date; -var t1$1 = new Date; + // Compute the start and end angle for each group and subgroup. + // Note: Opera has a bug reordering object literal properties! + x = 0, i = -1; while (++i < n) { + x0 = x, j = -1; while (++j < n) { + var di = groupIndex[i], + dj = subgroupIndex[di][j], + v = matrix[di][dj], + a0 = x, + a1 = x += v * k; + subgroups[dj * n + di] = { + index: di, + subindex: dj, + startAngle: a0, + endAngle: a1, + value: v + }; + } + groups[di] = { + index: di, + startAngle: x0, + endAngle: x, + value: groupSums[di] + }; + x += dx; + } -function newInterval(floori, offseti, count, field) { + // Generate chords for each (non-empty) subgroup-subgroup link. + i = -1; while (++i < n) { + j = i - 1; while (++j < n) { + var source = subgroups[j * n + i], + target = subgroups[i * n + j]; + if (source.value || target.value) { + chords.push(source.value < target.value + ? {source: target, target: source} + : {source: source, target: target}); + } + } + } - function interval(date) { - return floori(date = new Date(+date)), date; + return sortChords ? chords.sort(sortChords) : chords; } - interval.floor = interval; - - interval.ceil = function(date) { - return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date; + chord.padAngle = function(_) { + return arguments.length ? (padAngle = max$1(0, _), chord) : padAngle; }; - interval.round = function(date) { - var d0 = interval(date), - d1 = interval.ceil(date); - return date - d0 < d1 - date ? d0 : d1; + chord.sortGroups = function(_) { + return arguments.length ? (sortGroups = _, chord) : sortGroups; }; - interval.offset = function(date, step) { - return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date; + chord.sortSubgroups = function(_) { + return arguments.length ? (sortSubgroups = _, chord) : sortSubgroups; }; - interval.range = function(start, stop, step) { - var range = []; - start = interval.ceil(start); - step = step == null ? 1 : Math.floor(step); - if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date - do range.push(new Date(+start)); while (offseti(start, step), floori(start), start < stop) - return range; + chord.sortChords = function(_) { + return arguments.length ? (_ == null ? sortChords = null : (sortChords = compareValue(_))._ = _, chord) : sortChords && sortChords._; }; - interval.filter = function(test) { - return newInterval(function(date) { - if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1); - }, function(date, step) { - if (date >= date) while (--step >= 0) while (offseti(date, 1), !test(date)) {} // eslint-disable-line no-empty - }); + return chord; +}; + +var slice$2 = Array.prototype.slice; + +var constant$5 = function(x) { + return function() { + return x; }; +}; - if (count) { - interval.count = function(start, end) { - t0$1.setTime(+start), t1$1.setTime(+end); - floori(t0$1), floori(t1$1); - return Math.floor(count(t0$1, t1$1)); - }; +var pi$2 = Math.PI; +var tau$2 = 2 * pi$2; +var epsilon$1 = 1e-6; +var tauEpsilon = tau$2 - epsilon$1; - interval.every = function(step) { - step = Math.floor(step); - return !isFinite(step) || !(step > 0) ? null - : !(step > 1) ? interval - : interval.filter(field - ? function(d) { return field(d) % step === 0; } - : function(d) { return interval.count(0, d) % step === 0; }); - }; - } +function Path() { + this._x0 = this._y0 = // start of current subpath + this._x1 = this._y1 = null; // end of current subpath + this._ = ""; +} - return interval; +function path() { + return new Path; } -var millisecond = newInterval(function() { - // noop -}, function(date, step) { - date.setTime(+date + step); -}, function(start, end) { - return end - start; -}); +Path.prototype = path.prototype = { + constructor: Path, + moveTo: function(x, y) { + this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y); + }, + closePath: function() { + if (this._x1 !== null) { + this._x1 = this._x0, this._y1 = this._y0; + this._ += "Z"; + } + }, + lineTo: function(x, y) { + this._ += "L" + (this._x1 = +x) + "," + (this._y1 = +y); + }, + quadraticCurveTo: function(x1, y1, x, y) { + this._ += "Q" + (+x1) + "," + (+y1) + "," + (this._x1 = +x) + "," + (this._y1 = +y); + }, + bezierCurveTo: function(x1, y1, x2, y2, x, y) { + this._ += "C" + (+x1) + "," + (+y1) + "," + (+x2) + "," + (+y2) + "," + (this._x1 = +x) + "," + (this._y1 = +y); + }, + arcTo: function(x1, y1, x2, y2, r) { + x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r; + var x0 = this._x1, + y0 = this._y1, + x21 = x2 - x1, + y21 = y2 - y1, + x01 = x0 - x1, + y01 = y0 - y1, + l01_2 = x01 * x01 + y01 * y01; -// An optimized implementation for this simple case. -millisecond.every = function(k) { - k = Math.floor(k); - if (!isFinite(k) || !(k > 0)) return null; - if (!(k > 1)) return millisecond; - return newInterval(function(date) { - date.setTime(Math.floor(date / k) * k); - }, function(date, step) { - date.setTime(+date + step * k); - }, function(start, end) { - return (end - start) / k; - }); -}; + // Is the radius negative? Error. + if (r < 0) throw new Error("negative radius: " + r); -var milliseconds = millisecond.range; + // Is this path empty? Move to (x1,y1). + if (this._x1 === null) { + this._ += "M" + (this._x1 = x1) + "," + (this._y1 = y1); + } -var durationSecond = 1e3; -var durationMinute = 6e4; -var durationHour = 36e5; -var durationDay = 864e5; -var durationWeek = 6048e5; + // Or, is (x1,y1) coincident with (x0,y0)? Do nothing. + else if (!(l01_2 > epsilon$1)) {} -var second = newInterval(function(date) { - date.setTime(Math.floor(date / durationSecond) * durationSecond); -}, function(date, step) { - date.setTime(+date + step * durationSecond); -}, function(start, end) { - return (end - start) / durationSecond; -}, function(date) { - return date.getUTCSeconds(); -}); + // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear? + // Equivalently, is (x1,y1) coincident with (x2,y2)? + // Or, is the radius zero? Line to (x1,y1). + else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon$1) || !r) { + this._ += "L" + (this._x1 = x1) + "," + (this._y1 = y1); + } -var seconds = second.range; + // Otherwise, draw an arc! + else { + var x20 = x2 - x0, + y20 = y2 - y0, + l21_2 = x21 * x21 + y21 * y21, + l20_2 = x20 * x20 + y20 * y20, + l21 = Math.sqrt(l21_2), + l01 = Math.sqrt(l01_2), + l = r * Math.tan((pi$2 - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2), + t01 = l / l01, + t21 = l / l21; -var minute = newInterval(function(date) { - date.setTime(Math.floor(date / durationMinute) * durationMinute); -}, function(date, step) { - date.setTime(+date + step * durationMinute); -}, function(start, end) { - return (end - start) / durationMinute; -}, function(date) { - return date.getMinutes(); -}); + // If the start tangent is not coincident with (x0,y0), line to. + if (Math.abs(t01 - 1) > epsilon$1) { + this._ += "L" + (x1 + t01 * x01) + "," + (y1 + t01 * y01); + } -var minutes = minute.range; + this._ += "A" + r + "," + r + ",0,0," + (+(y01 * x20 > x01 * y20)) + "," + (this._x1 = x1 + t21 * x21) + "," + (this._y1 = y1 + t21 * y21); + } + }, + arc: function(x, y, r, a0, a1, ccw) { + x = +x, y = +y, r = +r; + var dx = r * Math.cos(a0), + dy = r * Math.sin(a0), + x0 = x + dx, + y0 = y + dy, + cw = 1 ^ ccw, + da = ccw ? a0 - a1 : a1 - a0; -var hour = newInterval(function(date) { - var offset = date.getTimezoneOffset() * durationMinute % durationHour; - if (offset < 0) offset += durationHour; - date.setTime(Math.floor((+date - offset) / durationHour) * durationHour + offset); -}, function(date, step) { - date.setTime(+date + step * durationHour); -}, function(start, end) { - return (end - start) / durationHour; -}, function(date) { - return date.getHours(); -}); + // Is the radius negative? Error. + if (r < 0) throw new Error("negative radius: " + r); -var hours = hour.range; + // Is this path empty? Move to (x0,y0). + if (this._x1 === null) { + this._ += "M" + x0 + "," + y0; + } -var day = newInterval(function(date) { - date.setHours(0, 0, 0, 0); -}, function(date, step) { - date.setDate(date.getDate() + step); -}, function(start, end) { - return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay; -}, function(date) { - return date.getDate() - 1; -}); + // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0). + else if (Math.abs(this._x1 - x0) > epsilon$1 || Math.abs(this._y1 - y0) > epsilon$1) { + this._ += "L" + x0 + "," + y0; + } -var days = day.range; + // Is this arc empty? We’re done. + if (!r) return; -function weekday(i) { - return newInterval(function(date) { - date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7); - date.setHours(0, 0, 0, 0); - }, function(date, step) { - date.setDate(date.getDate() + step * 7); - }, function(start, end) { - return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek; - }); + // Does the angle go the wrong way? Flip the direction. + if (da < 0) da = da % tau$2 + tau$2; + + // Is this a complete circle? Draw two arcs to complete the circle. + if (da > tauEpsilon) { + this._ += "A" + r + "," + r + ",0,1," + cw + "," + (x - dx) + "," + (y - dy) + "A" + r + "," + r + ",0,1," + cw + "," + (this._x1 = x0) + "," + (this._y1 = y0); + } + + // Is this arc non-empty? Draw an arc! + else if (da > epsilon$1) { + this._ += "A" + r + "," + r + ",0," + (+(da >= pi$2)) + "," + cw + "," + (this._x1 = x + r * Math.cos(a1)) + "," + (this._y1 = y + r * Math.sin(a1)); + } + }, + rect: function(x, y, w, h) { + this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y) + "h" + (+w) + "v" + (+h) + "h" + (-w) + "Z"; + }, + toString: function() { + return this._; + } +}; + +function defaultSource(d) { + return d.source; +} + +function defaultTarget(d) { + return d.target; +} + +function defaultRadius(d) { + return d.radius; +} + +function defaultStartAngle(d) { + return d.startAngle; } -var sunday = weekday(0); -var monday = weekday(1); -var tuesday = weekday(2); -var wednesday = weekday(3); -var thursday = weekday(4); -var friday = weekday(5); -var saturday = weekday(6); +function defaultEndAngle(d) { + return d.endAngle; +} -var sundays = sunday.range; -var mondays = monday.range; -var tuesdays = tuesday.range; -var wednesdays = wednesday.range; -var thursdays = thursday.range; -var fridays = friday.range; -var saturdays = saturday.range; +var ribbon = function() { + var source = defaultSource, + target = defaultTarget, + radius = defaultRadius, + startAngle = defaultStartAngle, + endAngle = defaultEndAngle, + context = null; -var month = newInterval(function(date) { - date.setDate(1); - date.setHours(0, 0, 0, 0); -}, function(date, step) { - date.setMonth(date.getMonth() + step); -}, function(start, end) { - return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12; -}, function(date) { - return date.getMonth(); -}); + function ribbon() { + var buffer, + argv = slice$2.call(arguments), + s = source.apply(this, argv), + t = target.apply(this, argv), + sr = +radius.apply(this, (argv[0] = s, argv)), + sa0 = startAngle.apply(this, argv) - halfPi$1, + sa1 = endAngle.apply(this, argv) - halfPi$1, + sx0 = sr * cos(sa0), + sy0 = sr * sin(sa0), + tr = +radius.apply(this, (argv[0] = t, argv)), + ta0 = startAngle.apply(this, argv) - halfPi$1, + ta1 = endAngle.apply(this, argv) - halfPi$1; -var months = month.range; + if (!context) context = buffer = path(); -var year = newInterval(function(date) { - date.setMonth(0, 1); - date.setHours(0, 0, 0, 0); -}, function(date, step) { - date.setFullYear(date.getFullYear() + step); -}, function(start, end) { - return end.getFullYear() - start.getFullYear(); -}, function(date) { - return date.getFullYear(); -}); + context.moveTo(sx0, sy0); + context.arc(0, 0, sr, sa0, sa1); + if (sa0 !== ta0 || sa1 !== ta1) { // TODO sr !== tr? + context.quadraticCurveTo(0, 0, tr * cos(ta0), tr * sin(ta0)); + context.arc(0, 0, tr, ta0, ta1); + } + context.quadraticCurveTo(0, 0, sx0, sy0); + context.closePath(); -// An optimized implementation for this simple case. -year.every = function(k) { - return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) { - date.setFullYear(Math.floor(date.getFullYear() / k) * k); - date.setMonth(0, 1); - date.setHours(0, 0, 0, 0); - }, function(date, step) { - date.setFullYear(date.getFullYear() + step * k); - }); -}; + if (buffer) return context = null, buffer + "" || null; + } -var years = year.range; + ribbon.radius = function(_) { + return arguments.length ? (radius = typeof _ === "function" ? _ : constant$5(+_), ribbon) : radius; + }; -var utcMinute = newInterval(function(date) { - date.setUTCSeconds(0, 0); -}, function(date, step) { - date.setTime(+date + step * durationMinute); -}, function(start, end) { - return (end - start) / durationMinute; -}, function(date) { - return date.getUTCMinutes(); -}); + ribbon.startAngle = function(_) { + return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$5(+_), ribbon) : startAngle; + }; -var utcMinutes = utcMinute.range; + ribbon.endAngle = function(_) { + return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$5(+_), ribbon) : endAngle; + }; -var utcHour = newInterval(function(date) { - date.setUTCMinutes(0, 0, 0); -}, function(date, step) { - date.setTime(+date + step * durationHour); -}, function(start, end) { - return (end - start) / durationHour; -}, function(date) { - return date.getUTCHours(); -}); + ribbon.source = function(_) { + return arguments.length ? (source = _, ribbon) : source; + }; -var utcHours = utcHour.range; + ribbon.target = function(_) { + return arguments.length ? (target = _, ribbon) : target; + }; -var utcDay = newInterval(function(date) { - date.setUTCHours(0, 0, 0, 0); -}, function(date, step) { - date.setUTCDate(date.getUTCDate() + step); -}, function(start, end) { - return (end - start) / durationDay; -}, function(date) { - return date.getUTCDate() - 1; -}); + ribbon.context = function(_) { + return arguments.length ? ((context = _ == null ? null : _), ribbon) : context; + }; -var utcDays = utcDay.range; + return ribbon; +}; -function utcWeekday(i) { - return newInterval(function(date) { - date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7); - date.setUTCHours(0, 0, 0, 0); - }, function(date, step) { - date.setUTCDate(date.getUTCDate() + step * 7); - }, function(start, end) { - return (end - start) / durationWeek; - }); -} +var prefix = "$"; -var utcSunday = utcWeekday(0); -var utcMonday = utcWeekday(1); -var utcTuesday = utcWeekday(2); -var utcWednesday = utcWeekday(3); -var utcThursday = utcWeekday(4); -var utcFriday = utcWeekday(5); -var utcSaturday = utcWeekday(6); +function Map() {} -var utcSundays = utcSunday.range; -var utcMondays = utcMonday.range; -var utcTuesdays = utcTuesday.range; -var utcWednesdays = utcWednesday.range; -var utcThursdays = utcThursday.range; -var utcFridays = utcFriday.range; -var utcSaturdays = utcSaturday.range; +Map.prototype = map$1.prototype = { + constructor: Map, + has: function(key) { + return (prefix + key) in this; + }, + get: function(key) { + return this[prefix + key]; + }, + set: function(key, value) { + this[prefix + key] = value; + return this; + }, + remove: function(key) { + var property = prefix + key; + return property in this && delete this[property]; + }, + clear: function() { + for (var property in this) if (property[0] === prefix) delete this[property]; + }, + keys: function() { + var keys = []; + for (var property in this) if (property[0] === prefix) keys.push(property.slice(1)); + return keys; + }, + values: function() { + var values = []; + for (var property in this) if (property[0] === prefix) values.push(this[property]); + return values; + }, + entries: function() { + var entries = []; + for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]}); + return entries; + }, + size: function() { + var size = 0; + for (var property in this) if (property[0] === prefix) ++size; + return size; + }, + empty: function() { + for (var property in this) if (property[0] === prefix) return false; + return true; + }, + each: function(f) { + for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this); + } +}; -var utcMonth = newInterval(function(date) { - date.setUTCDate(1); - date.setUTCHours(0, 0, 0, 0); -}, function(date, step) { - date.setUTCMonth(date.getUTCMonth() + step); -}, function(start, end) { - return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12; -}, function(date) { - return date.getUTCMonth(); -}); +function map$1(object, f) { + var map = new Map; -var utcMonths = utcMonth.range; + // Copy constructor. + if (object instanceof Map) object.each(function(value, key) { map.set(key, value); }); -var utcYear = newInterval(function(date) { - date.setUTCMonth(0, 1); - date.setUTCHours(0, 0, 0, 0); -}, function(date, step) { - date.setUTCFullYear(date.getUTCFullYear() + step); -}, function(start, end) { - return end.getUTCFullYear() - start.getUTCFullYear(); -}, function(date) { - return date.getUTCFullYear(); -}); + // Index array by numeric index or specified key function. + else if (Array.isArray(object)) { + var i = -1, + n = object.length, + o; -// An optimized implementation for this simple case. -utcYear.every = function(k) { - return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) { - date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k); - date.setUTCMonth(0, 1); - date.setUTCHours(0, 0, 0, 0); - }, function(date, step) { - date.setUTCFullYear(date.getUTCFullYear() + step * k); - }); -}; + if (f == null) while (++i < n) map.set(i, object[i]); + else while (++i < n) map.set(f(o = object[i], i, object), o); + } -var utcYears = utcYear.range; + // Convert object to map. + else if (object) for (var key in object) map.set(key, object[key]); -// Computes the decimal coefficient and exponent of the specified number x with -// significant digits p, where x is positive and p is in [1, 21] or undefined. -// For example, formatDecimal(1.23) returns ["123", 0]. -var formatDecimal = function(x, p) { - if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity - var i, coefficient = x.slice(0, i); + return map; +} - // The string returned by toExponential either has the form \d\.\d+e[-+]\d+ - // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3). - return [ - coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, - +x.slice(i + 1) - ]; -}; +var nest = function() { + var keys = [], + sortKeys = [], + sortValues, + rollup, + nest; -var exponent$1 = function(x) { - return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN; -}; + function apply(array, depth, createResult, setResult) { + if (depth >= keys.length) return rollup != null + ? rollup(array) : (sortValues != null + ? array.sort(sortValues) + : array); -var formatGroup = function(grouping, thousands) { - return function(value, width) { - var i = value.length, - t = [], - j = 0, - g = grouping[0], - length = 0; + var i = -1, + n = array.length, + key = keys[depth++], + keyValue, + value, + valuesByKey = map$1(), + values, + result = createResult(); - while (i > 0 && g > 0) { - if (length + g + 1 > width) g = Math.max(1, width - length); - t.push(value.substring(i -= g, i + g)); - if ((length += g + 1) > width) break; - g = grouping[j = (j + 1) % grouping.length]; + while (++i < n) { + if (values = valuesByKey.get(keyValue = key(value = array[i]) + "")) { + values.push(value); + } else { + valuesByKey.set(keyValue, [value]); + } } - return t.reverse().join(thousands); - }; -}; + valuesByKey.each(function(values, key) { + setResult(result, key, apply(values, depth, createResult, setResult)); + }); -var formatDefault = function(x, p) { - x = x.toPrecision(p); + return result; + } - out: for (var n = x.length, i = 1, i0 = -1, i1; i < n; ++i) { - switch (x[i]) { - case ".": i0 = i1 = i; break; - case "0": if (i0 === 0) i0 = i; i1 = i; break; - case "e": break out; - default: if (i0 > 0) i0 = 0; break; - } + function entries(map, depth) { + if (++depth > keys.length) return map; + var array, sortKey = sortKeys[depth - 1]; + if (rollup != null && depth >= keys.length) array = map.entries(); + else array = [], map.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); }); + return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array; } - return i0 > 0 ? x.slice(0, i0) + x.slice(i1 + 1) : x; + return nest = { + object: function(array) { return apply(array, 0, createObject, setObject); }, + map: function(array) { return apply(array, 0, createMap, setMap); }, + entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); }, + key: function(d) { keys.push(d); return nest; }, + sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; }, + sortValues: function(order) { sortValues = order; return nest; }, + rollup: function(f) { rollup = f; return nest; } + }; }; -var prefixExponent; - -var formatPrefixAuto = function(x, p) { - var d = formatDecimal(x, p); - if (!d) return x + ""; - var coefficient = d[0], - exponent = d[1], - i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1, - n = coefficient.length; - return i === n ? coefficient - : i > n ? coefficient + new Array(i - n + 1).join("0") - : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i) - : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y! -}; +function createObject() { + return {}; +} -var formatRounded = function(x, p) { - var d = formatDecimal(x, p); - if (!d) return x + ""; - var coefficient = d[0], - exponent = d[1]; - return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient - : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1) - : coefficient + new Array(exponent - coefficient.length + 2).join("0"); -}; +function setObject(object, key, value) { + object[key] = value; +} -var formatTypes = { - "": formatDefault, - "%": function(x, p) { return (x * 100).toFixed(p); }, - "b": function(x) { return Math.round(x).toString(2); }, - "c": function(x) { return x + ""; }, - "d": function(x) { return Math.round(x).toString(10); }, - "e": function(x, p) { return x.toExponential(p); }, - "f": function(x, p) { return x.toFixed(p); }, - "g": function(x, p) { return x.toPrecision(p); }, - "o": function(x) { return Math.round(x).toString(8); }, - "p": function(x, p) { return formatRounded(x * 100, p); }, - "r": formatRounded, - "s": formatPrefixAuto, - "X": function(x) { return Math.round(x).toString(16).toUpperCase(); }, - "x": function(x) { return Math.round(x).toString(16); } -}; +function createMap() { + return map$1(); +} -// [[fill]align][sign][symbol][0][width][,][.precision][type] -var re = /^(?:(.)?([<>=^]))?([+\-\( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?([a-z%])?$/i; +function setMap(map, key, value) { + map.set(key, value); +} -var formatSpecifier = function(specifier) { - return new FormatSpecifier(specifier); -}; +function Set() {} -function FormatSpecifier(specifier) { - if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier); +var proto = map$1.prototype; - var match, - fill = match[1] || " ", - align = match[2] || ">", - sign = match[3] || "-", - symbol = match[4] || "", - zero = !!match[5], - width = match[6] && +match[6], - comma = !!match[7], - precision = match[8] && +match[8].slice(1), - type = match[9] || ""; +Set.prototype = set$2.prototype = { + constructor: Set, + has: proto.has, + add: function(value) { + value += ""; + this[prefix + value] = value; + return this; + }, + remove: proto.remove, + clear: proto.clear, + values: proto.keys, + size: proto.size, + empty: proto.empty, + each: proto.each +}; - // The "n" type is an alias for ",g". - if (type === "n") comma = true, type = "g"; +function set$2(object, f) { + var set = new Set; - // Map invalid types to the default format. - else if (!formatTypes[type]) type = ""; + // Copy constructor. + if (object instanceof Set) object.each(function(value) { set.add(value); }); - // If zero fill is specified, padding goes after sign and before digits. - if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "="; + // Otherwise, assume it’s an array. + else if (object) { + var i = -1, n = object.length; + if (f == null) while (++i < n) set.add(object[i]); + else while (++i < n) set.add(f(object[i], i, object)); + } - this.fill = fill; - this.align = align; - this.sign = sign; - this.symbol = symbol; - this.zero = zero; - this.width = width; - this.comma = comma; - this.precision = precision; - this.type = type; + return set; } -FormatSpecifier.prototype.toString = function() { - return this.fill - + this.align - + this.sign - + this.symbol - + (this.zero ? "0" : "") - + (this.width == null ? "" : Math.max(1, this.width | 0)) - + (this.comma ? "," : "") - + (this.precision == null ? "" : "." + Math.max(0, this.precision | 0)) - + this.type; +var keys = function(map) { + var keys = []; + for (var key in map) keys.push(key); + return keys; }; -var prefixes = ["y","z","a","f","p","n","\xB5","m","","k","M","G","T","P","E","Z","Y"]; - -function identity$3(x) { - return x; -} - -var formatLocale = function(locale) { - var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3, - currency = locale.currency, - decimal = locale.decimal; - - function newFormat(specifier) { - specifier = formatSpecifier(specifier); - - var fill = specifier.fill, - align = specifier.align, - sign = specifier.sign, - symbol = specifier.symbol, - zero = specifier.zero, - width = specifier.width, - comma = specifier.comma, - precision = specifier.precision, - type = specifier.type; +var values = function(map) { + var values = []; + for (var key in map) values.push(map[key]); + return values; +}; - // Compute the prefix and suffix. - // For SI-prefix, the suffix is lazily computed. - var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "", - suffix = symbol === "$" ? currency[1] : /[%p]/.test(type) ? "%" : ""; +var entries = function(map) { + var entries = []; + for (var key in map) entries.push({key: key, value: map[key]}); + return entries; +}; - // What format function should we use? - // Is this an integer type? - // Can this type generate exponential notation? - var formatType = formatTypes[type], - maybeSuffix = !type || /[defgprs%]/.test(type); +function objectConverter(columns) { + return new Function("d", "return {" + columns.map(function(name, i) { + return JSON.stringify(name) + ": d[" + i + "]"; + }).join(",") + "}"); +} - // Set the default precision if not specified, - // or clamp the specified precision to the supported range. - // For significant precision, it must be in [1, 21]. - // For fixed precision, it must be in [0, 20]. - precision = precision == null ? (type ? 6 : 12) - : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) - : Math.max(0, Math.min(20, precision)); +function customConverter(columns, f) { + var object = objectConverter(columns); + return function(row, i) { + return f(object(row), i, columns); + }; +} - function format(value) { - var valuePrefix = prefix, - valueSuffix = suffix, - i, n, c; +// Compute unique columns in order of discovery. +function inferColumns(rows) { + var columnSet = Object.create(null), + columns = []; - if (type === "c") { - valueSuffix = formatType(value) + valueSuffix; - value = ""; - } else { - value = +value; + rows.forEach(function(row) { + for (var column in row) { + if (!(column in columnSet)) { + columns.push(columnSet[column] = column); + } + } + }); - // Convert negative to positive, and compute the prefix. - // Note that -0 is not less than 0, but 1 / -0 is! - var valueNegative = (value < 0 || 1 / value < 0) && (value *= -1, true); + return columns; +} - // Perform the initial formatting. - value = formatType(value, precision); +var dsv = function(delimiter) { + var reFormat = new RegExp("[\"" + delimiter + "\n\r]"), + delimiterCode = delimiter.charCodeAt(0); - // If the original value was negative, it may be rounded to zero during - // formatting; treat this as (positive) zero. - if (valueNegative) { - i = -1, n = value.length; - valueNegative = false; - while (++i < n) { - if (c = value.charCodeAt(i), (48 < c && c < 58) - || (type === "x" && 96 < c && c < 103) - || (type === "X" && 64 < c && c < 71)) { - valueNegative = true; - break; - } - } - } + function parse(text, f) { + var convert, columns, rows = parseRows(text, function(row, i) { + if (convert) return convert(row, i - 1); + columns = row, convert = f ? customConverter(row, f) : objectConverter(row); + }); + rows.columns = columns; + return rows; + } - // Compute the prefix and suffix. - valuePrefix = (valueNegative ? (sign === "(" ? sign : "-") : sign === "-" || sign === "(" ? "" : sign) + valuePrefix; - valueSuffix = valueSuffix + (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + (valueNegative && sign === "(" ? ")" : ""); + function parseRows(text, f) { + var EOL = {}, // sentinel value for end-of-line + EOF = {}, // sentinel value for end-of-file + rows = [], // output rows + N = text.length, + I = 0, // current character index + n = 0, // the current line number + t, // the current token + eol; // is the current token followed by EOL? - // Break the formatted value into the integer “value” part that can be - // grouped, and fractional or exponential “suffix” part that is not. - if (maybeSuffix) { - i = -1, n = value.length; - while (++i < n) { - if (c = value.charCodeAt(i), 48 > c || c > 57) { - valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix; - value = value.slice(0, i); - break; - } + function token() { + if (I >= N) return EOF; // special case: end of file + if (eol) return eol = false, EOL; // special case: end of line + + // special case: quotes + var j = I, c; + if (text.charCodeAt(j) === 34) { + var i = j; + while (i++ < N) { + if (text.charCodeAt(i) === 34) { + if (text.charCodeAt(i + 1) !== 34) break; + ++i; } } + I = i + 2; + c = text.charCodeAt(i + 1); + if (c === 13) { + eol = true; + if (text.charCodeAt(i + 2) === 10) ++I; + } else if (c === 10) { + eol = true; + } + return text.slice(j + 1, i).replace(/""/g, "\""); } - // If the fill character is not "0", grouping is applied before padding. - if (comma && !zero) value = group(value, Infinity); - - // Compute the padding. - var length = valuePrefix.length + value.length + valueSuffix.length, - padding = length < width ? new Array(width - length + 1).join(fill) : ""; + // common case: find next delimiter or newline + while (I < N) { + var k = 1; + c = text.charCodeAt(I++); + if (c === 10) eol = true; // \n + else if (c === 13) { eol = true; if (text.charCodeAt(I) === 10) ++I, ++k; } // \r|\r\n + else if (c !== delimiterCode) continue; + return text.slice(j, I - k); + } - // If the fill character is "0", grouping is applied after padding. - if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; + // special case: last token before EOF + return text.slice(j); + } - // Reconstruct the final output based on the desired alignment. - switch (align) { - case "<": return valuePrefix + value + valueSuffix + padding; - case "=": return valuePrefix + padding + value + valueSuffix; - case "^": return padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); + while ((t = token()) !== EOF) { + var a = []; + while (t !== EOL && t !== EOF) { + a.push(t); + t = token(); } - return padding + valuePrefix + value + valueSuffix; + if (f && (a = f(a, n++)) == null) continue; + rows.push(a); } - format.toString = function() { - return specifier + ""; - }; - - return format; + return rows; } - function formatPrefix(specifier, value) { - var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)), - e = Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3, - k = Math.pow(10, -e), - prefix = prefixes[8 + e / 3]; - return function(value) { - return f(k * value) + prefix; - }; + function format(rows, columns) { + if (columns == null) columns = inferColumns(rows); + return [columns.map(formatValue).join(delimiter)].concat(rows.map(function(row) { + return columns.map(function(column) { + return formatValue(row[column]); + }).join(delimiter); + })).join("\n"); } - return { - format: newFormat, - formatPrefix: formatPrefix - }; -}; - -var locale$1; - - + function formatRows(rows) { + return rows.map(formatRow).join("\n"); + } -defaultLocale({ - decimal: ".", - thousands: ",", - grouping: [3], - currency: ["$", ""] -}); + function formatRow(row) { + return row.map(formatValue).join(delimiter); + } -function defaultLocale(definition) { - locale$1 = formatLocale(definition); - exports.format = locale$1.format; - exports.formatPrefix = locale$1.formatPrefix; - return locale$1; -} + function formatValue(text) { + return text == null ? "" + : reFormat.test(text += "") ? "\"" + text.replace(/\"/g, "\"\"") + "\"" + : text; + } -var precisionFixed = function(step) { - return Math.max(0, -exponent$1(Math.abs(step))); + return { + parse: parse, + parseRows: parseRows, + format: format, + formatRows: formatRows + }; }; -var precisionPrefix = function(step, value) { - return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3 - exponent$1(Math.abs(step))); -}; +var csv = dsv(","); -var precisionRound = function(step, max) { - step = Math.abs(step), max = Math.abs(max) - step; - return Math.max(0, exponent$1(max) - exponent$1(step)) + 1; -}; +var csvParse = csv.parse; +var csvParseRows = csv.parseRows; +var csvFormat = csv.format; +var csvFormatRows = csv.formatRows; -function localDate(d) { - if (0 <= d.y && d.y < 100) { - var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L); - date.setFullYear(d.y); - return date; - } - return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L); -} +var tsv = dsv("\t"); -function utcDate(d) { - if (0 <= d.y && d.y < 100) { - var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L)); - date.setUTCFullYear(d.y); - return date; - } - return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L)); -} +var tsvParse = tsv.parse; +var tsvParseRows = tsv.parseRows; +var tsvFormat = tsv.format; +var tsvFormatRows = tsv.formatRows; -function newYear(y) { - return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0}; -} +var center$1 = function(x, y) { + var nodes; -function formatLocale$1(locale) { - var locale_dateTime = locale.dateTime, - locale_date = locale.date, - locale_time = locale.time, - locale_periods = locale.periods, - locale_weekdays = locale.days, - locale_shortWeekdays = locale.shortDays, - locale_months = locale.months, - locale_shortMonths = locale.shortMonths; + if (x == null) x = 0; + if (y == null) y = 0; - var periodRe = formatRe(locale_periods), - periodLookup = formatLookup(locale_periods), - weekdayRe = formatRe(locale_weekdays), - weekdayLookup = formatLookup(locale_weekdays), - shortWeekdayRe = formatRe(locale_shortWeekdays), - shortWeekdayLookup = formatLookup(locale_shortWeekdays), - monthRe = formatRe(locale_months), - monthLookup = formatLookup(locale_months), - shortMonthRe = formatRe(locale_shortMonths), - shortMonthLookup = formatLookup(locale_shortMonths); + function force() { + var i, + n = nodes.length, + node, + sx = 0, + sy = 0; - var formats = { - "a": formatShortWeekday, - "A": formatWeekday, - "b": formatShortMonth, - "B": formatMonth, - "c": null, - "d": formatDayOfMonth, - "e": formatDayOfMonth, - "H": formatHour24, - "I": formatHour12, - "j": formatDayOfYear, - "L": formatMilliseconds, - "m": formatMonthNumber, - "M": formatMinutes, - "p": formatPeriod, - "S": formatSeconds, - "U": formatWeekNumberSunday, - "w": formatWeekdayNumber, - "W": formatWeekNumberMonday, - "x": null, - "X": null, - "y": formatYear, - "Y": formatFullYear, - "Z": formatZone, - "%": formatLiteralPercent + for (i = 0; i < n; ++i) { + node = nodes[i], sx += node.x, sy += node.y; + } + + for (sx = sx / n - x, sy = sy / n - y, i = 0; i < n; ++i) { + node = nodes[i], node.x -= sx, node.y -= sy; + } + } + + force.initialize = function(_) { + nodes = _; }; - var utcFormats = { - "a": formatUTCShortWeekday, - "A": formatUTCWeekday, - "b": formatUTCShortMonth, - "B": formatUTCMonth, - "c": null, - "d": formatUTCDayOfMonth, - "e": formatUTCDayOfMonth, - "H": formatUTCHour24, - "I": formatUTCHour12, - "j": formatUTCDayOfYear, - "L": formatUTCMilliseconds, - "m": formatUTCMonthNumber, - "M": formatUTCMinutes, - "p": formatUTCPeriod, - "S": formatUTCSeconds, - "U": formatUTCWeekNumberSunday, - "w": formatUTCWeekdayNumber, - "W": formatUTCWeekNumberMonday, - "x": null, - "X": null, - "y": formatUTCYear, - "Y": formatUTCFullYear, - "Z": formatUTCZone, - "%": formatLiteralPercent + force.x = function(_) { + return arguments.length ? (x = +_, force) : x; }; - var parses = { - "a": parseShortWeekday, - "A": parseWeekday, - "b": parseShortMonth, - "B": parseMonth, - "c": parseLocaleDateTime, - "d": parseDayOfMonth, - "e": parseDayOfMonth, - "H": parseHour24, - "I": parseHour24, - "j": parseDayOfYear, - "L": parseMilliseconds, - "m": parseMonthNumber, - "M": parseMinutes, - "p": parsePeriod, - "S": parseSeconds, - "U": parseWeekNumberSunday, - "w": parseWeekdayNumber, - "W": parseWeekNumberMonday, - "x": parseLocaleDate, - "X": parseLocaleTime, - "y": parseYear, - "Y": parseFullYear, - "Z": parseZone, - "%": parseLiteralPercent + force.y = function(_) { + return arguments.length ? (y = +_, force) : y; }; - // These recursive directive definitions must be deferred. - formats.x = newFormat(locale_date, formats); - formats.X = newFormat(locale_time, formats); - formats.c = newFormat(locale_dateTime, formats); - utcFormats.x = newFormat(locale_date, utcFormats); - utcFormats.X = newFormat(locale_time, utcFormats); - utcFormats.c = newFormat(locale_dateTime, utcFormats); + return force; +}; - function newFormat(specifier, formats) { - return function(date) { - var string = [], - i = -1, - j = 0, - n = specifier.length, - c, - pad, - format; +var constant$6 = function(x) { + return function() { + return x; + }; +}; - if (!(date instanceof Date)) date = new Date(+date); +var jiggle = function() { + return (Math.random() - 0.5) * 1e-6; +}; - while (++i < n) { - if (specifier.charCodeAt(i) === 37) { - string.push(specifier.slice(j, i)); - if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i); - else pad = c === "e" ? " " : "0"; - if (format = formats[c]) c = format(date, pad); - string.push(c); - j = i + 1; - } - } +var tree_add = function(d) { + var x = +this._x.call(null, d), + y = +this._y.call(null, d); + return add(this.cover(x, y), x, y, d); +}; - string.push(specifier.slice(j, i)); - return string.join(""); - }; +function add(tree, x, y, d) { + if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points + + var parent, + node = tree._root, + leaf = {data: d}, + x0 = tree._x0, + y0 = tree._y0, + x1 = tree._x1, + y1 = tree._y1, + xm, + ym, + xp, + yp, + right, + bottom, + i, + j; + + // If the tree is empty, initialize the root as a leaf. + if (!node) return tree._root = leaf, tree; + + // Find the existing leaf for the new point, or add it. + while (node.length) { + if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm; + if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym; + if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree; } - function newParse(specifier, newDate) { - return function(string) { - var d = newYear(1900), - i = parseSpecifier(d, specifier, string += "", 0); - if (i != string.length) return null; + // Is the new point is exactly coincident with the existing point? + xp = +tree._x.call(null, node.data); + yp = +tree._y.call(null, node.data); + if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree; - // The am-pm flag is 0 for AM, and 1 for PM. - if ("p" in d) d.H = d.H % 12 + d.p * 12; + // Otherwise, split the leaf node until the old and new point are separated. + do { + parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4); + if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm; + if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym; + } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm))); + return parent[j] = node, parent[i] = leaf, tree; +} - // Convert day-of-week and week-of-year to day-of-year. - if ("W" in d || "U" in d) { - if (!("w" in d)) d.w = "W" in d ? 1 : 0; - var day$$1 = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay(); - d.m = 0; - d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7; - } +function addAll(data) { + var d, i, n = data.length, + x, + y, + xz = new Array(n), + yz = new Array(n), + x0 = Infinity, + y0 = Infinity, + x1 = -Infinity, + y1 = -Infinity; - // If a time zone is specified, all fields are interpreted as UTC and then - // offset according to the specified time zone. - if ("Z" in d) { - d.H += d.Z / 100 | 0; - d.M += d.Z % 100; - return utcDate(d); - } + // Compute the points and their extent. + for (i = 0; i < n; ++i) { + if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue; + xz[i] = x; + yz[i] = y; + if (x < x0) x0 = x; + if (x > x1) x1 = x; + if (y < y0) y0 = y; + if (y > y1) y1 = y; + } - // Otherwise, all fields are in local time. - return newDate(d); - }; + // If there were no (valid) points, inherit the existing extent. + if (x1 < x0) x0 = this._x0, x1 = this._x1; + if (y1 < y0) y0 = this._y0, y1 = this._y1; + + // Expand the tree to cover the new points. + this.cover(x0, y0).cover(x1, y1); + + // Add the new points. + for (i = 0; i < n; ++i) { + add(this, xz[i], yz[i], data[i]); } - function parseSpecifier(d, specifier, string, j) { - var i = 0, - n = specifier.length, - m = string.length, - c, - parse; + return this; +} - while (i < n) { - if (j >= m) return -1; - c = specifier.charCodeAt(i++); - if (c === 37) { - c = specifier.charAt(i++); - parse = parses[c in pads ? specifier.charAt(i++) : c]; - if (!parse || ((j = parse(d, string, j)) < 0)) return -1; - } else if (c != string.charCodeAt(j++)) { - return -1; +var tree_cover = function(x, y) { + if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points + + var x0 = this._x0, + y0 = this._y0, + x1 = this._x1, + y1 = this._y1; + + // If the quadtree has no extent, initialize them. + // Integer extent are necessary so that if we later double the extent, + // the existing quadrant boundaries don’t change due to floating point error! + if (isNaN(x0)) { + x1 = (x0 = Math.floor(x)) + 1; + y1 = (y0 = Math.floor(y)) + 1; + } + + // Otherwise, double repeatedly to cover. + else if (x0 > x || x > x1 || y0 > y || y > y1) { + var z = x1 - x0, + node = this._root, + parent, + i; + + switch (i = (y < (y0 + y1) / 2) << 1 | (x < (x0 + x1) / 2)) { + case 0: { + do parent = new Array(4), parent[i] = node, node = parent; + while (z *= 2, x1 = x0 + z, y1 = y0 + z, x > x1 || y > y1); + break; + } + case 1: { + do parent = new Array(4), parent[i] = node, node = parent; + while (z *= 2, x0 = x1 - z, y1 = y0 + z, x0 > x || y > y1); + break; + } + case 2: { + do parent = new Array(4), parent[i] = node, node = parent; + while (z *= 2, x1 = x0 + z, y0 = y1 - z, x > x1 || y0 > y); + break; + } + case 3: { + do parent = new Array(4), parent[i] = node, node = parent; + while (z *= 2, x0 = x1 - z, y0 = y1 - z, x0 > x || y0 > y); + break; } } - return j; + if (this._root && this._root.length) this._root = node; } - function parsePeriod(d, string, i) { - var n = periodRe.exec(string.slice(i)); - return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1; - } + // If the quadtree covers the point already, just return. + else return this; - function parseShortWeekday(d, string, i) { - var n = shortWeekdayRe.exec(string.slice(i)); - return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1; - } + this._x0 = x0; + this._y0 = y0; + this._x1 = x1; + this._y1 = y1; + return this; +}; - function parseWeekday(d, string, i) { - var n = weekdayRe.exec(string.slice(i)); - return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1; - } +var tree_data = function() { + var data = []; + this.visit(function(node) { + if (!node.length) do data.push(node.data); while (node = node.next) + }); + return data; +}; - function parseShortMonth(d, string, i) { - var n = shortMonthRe.exec(string.slice(i)); - return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1; - } +var tree_extent = function(_) { + return arguments.length + ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1]) + : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]]; +}; - function parseMonth(d, string, i) { - var n = monthRe.exec(string.slice(i)); - return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1; - } +var Quad = function(node, x0, y0, x1, y1) { + this.node = node; + this.x0 = x0; + this.y0 = y0; + this.x1 = x1; + this.y1 = y1; +}; - function parseLocaleDateTime(d, string, i) { - return parseSpecifier(d, locale_dateTime, string, i); - } +var tree_find = function(x, y, radius) { + var data, + x0 = this._x0, + y0 = this._y0, + x1, + y1, + x2, + y2, + x3 = this._x1, + y3 = this._y1, + quads = [], + node = this._root, + q, + i; - function parseLocaleDate(d, string, i) { - return parseSpecifier(d, locale_date, string, i); + if (node) quads.push(new Quad(node, x0, y0, x3, y3)); + if (radius == null) radius = Infinity; + else { + x0 = x - radius, y0 = y - radius; + x3 = x + radius, y3 = y + radius; + radius *= radius; } - function parseLocaleTime(d, string, i) { - return parseSpecifier(d, locale_time, string, i); - } + while (q = quads.pop()) { - function formatShortWeekday(d) { - return locale_shortWeekdays[d.getDay()]; - } + // Stop searching if this quadrant can’t contain a closer node. + if (!(node = q.node) + || (x1 = q.x0) > x3 + || (y1 = q.y0) > y3 + || (x2 = q.x1) < x0 + || (y2 = q.y1) < y0) continue; - function formatWeekday(d) { - return locale_weekdays[d.getDay()]; - } + // Bisect the current quadrant. + if (node.length) { + var xm = (x1 + x2) / 2, + ym = (y1 + y2) / 2; - function formatShortMonth(d) { - return locale_shortMonths[d.getMonth()]; - } + quads.push( + new Quad(node[3], xm, ym, x2, y2), + new Quad(node[2], x1, ym, xm, y2), + new Quad(node[1], xm, y1, x2, ym), + new Quad(node[0], x1, y1, xm, ym) + ); - function formatMonth(d) { - return locale_months[d.getMonth()]; - } + // Visit the closest quadrant first. + if (i = (y >= ym) << 1 | (x >= xm)) { + q = quads[quads.length - 1]; + quads[quads.length - 1] = quads[quads.length - 1 - i]; + quads[quads.length - 1 - i] = q; + } + } - function formatPeriod(d) { - return locale_periods[+(d.getHours() >= 12)]; + // Visit this point. (Visiting coincident points isn’t necessary!) + else { + var dx = x - +this._x.call(null, node.data), + dy = y - +this._y.call(null, node.data), + d2 = dx * dx + dy * dy; + if (d2 < radius) { + var d = Math.sqrt(radius = d2); + x0 = x - d, y0 = y - d; + x3 = x + d, y3 = y + d; + data = node.data; + } + } } - function formatUTCShortWeekday(d) { - return locale_shortWeekdays[d.getUTCDay()]; - } + return data; +}; - function formatUTCWeekday(d) { - return locale_weekdays[d.getUTCDay()]; - } +var tree_remove = function(d) { + if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points - function formatUTCShortMonth(d) { - return locale_shortMonths[d.getUTCMonth()]; - } + var parent, + node = this._root, + retainer, + previous, + next, + x0 = this._x0, + y0 = this._y0, + x1 = this._x1, + y1 = this._y1, + x, + y, + xm, + ym, + right, + bottom, + i, + j; - function formatUTCMonth(d) { - return locale_months[d.getUTCMonth()]; - } + // If the tree is empty, initialize the root as a leaf. + if (!node) return this; - function formatUTCPeriod(d) { - return locale_periods[+(d.getUTCHours() >= 12)]; + // Find the leaf node for the point. + // While descending, also retain the deepest parent with a non-removed sibling. + if (node.length) while (true) { + if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm; + if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym; + if (!(parent = node, node = node[i = bottom << 1 | right])) return this; + if (!node.length) break; + if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i; } - return { - format: function(specifier) { - var f = newFormat(specifier += "", formats); - f.toString = function() { return specifier; }; - return f; - }, - parse: function(specifier) { - var p = newParse(specifier += "", localDate); - p.toString = function() { return specifier; }; - return p; - }, - utcFormat: function(specifier) { - var f = newFormat(specifier += "", utcFormats); - f.toString = function() { return specifier; }; - return f; - }, - utcParse: function(specifier) { - var p = newParse(specifier, utcDate); - p.toString = function() { return specifier; }; - return p; - } - }; -} + // Find the point to remove. + while (node.data !== d) if (!(previous = node, node = node.next)) return this; + if (next = node.next) delete node.next; -var pads = {"-": "", "_": " ", "0": "0"}; -var numberRe = /^\s*\d+/; -var percentRe = /^%/; -var requoteRe = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g; + // If there are multiple coincident points, remove just the point. + if (previous) return (next ? previous.next = next : delete previous.next), this; -function pad(value, fill, width) { - var sign = value < 0 ? "-" : "", - string = (sign ? -value : value) + "", - length = string.length; - return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string); -} + // If this is the root point, remove it. + if (!parent) return this._root = next, this; -function requote(s) { - return s.replace(requoteRe, "\\$&"); -} + // Remove this leaf. + next ? parent[i] = next : delete parent[i]; -function formatRe(names) { - return new RegExp("^(?:" + names.map(requote).join("|") + ")", "i"); -} + // If the parent now contains exactly one leaf, collapse superfluous parents. + if ((node = parent[0] || parent[1] || parent[2] || parent[3]) + && node === (parent[3] || parent[2] || parent[1] || parent[0]) + && !node.length) { + if (retainer) retainer[j] = node; + else this._root = node; + } -function formatLookup(names) { - var map = {}, i = -1, n = names.length; - while (++i < n) map[names[i].toLowerCase()] = i; - return map; + return this; +}; + +function removeAll(data) { + for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]); + return this; } -function parseWeekdayNumber(d, string, i) { - var n = numberRe.exec(string.slice(i, i + 1)); - return n ? (d.w = +n[0], i + n[0].length) : -1; -} +var tree_root = function() { + return this._root; +}; + +var tree_size = function() { + var size = 0; + this.visit(function(node) { + if (!node.length) do ++size; while (node = node.next) + }); + return size; +}; + +var tree_visit = function(callback) { + var quads = [], q, node = this._root, child, x0, y0, x1, y1; + if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1)); + while (q = quads.pop()) { + if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) { + var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2; + if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1)); + if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1)); + if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym)); + if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym)); + } + } + return this; +}; + +var tree_visitAfter = function(callback) { + var quads = [], next = [], q; + if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1)); + while (q = quads.pop()) { + var node = q.node; + if (node.length) { + var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2; + if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym)); + if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym)); + if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1)); + if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1)); + } + next.push(q); + } + while (q = next.pop()) { + callback(q.node, q.x0, q.y0, q.x1, q.y1); + } + return this; +}; -function parseWeekNumberSunday(d, string, i) { - var n = numberRe.exec(string.slice(i)); - return n ? (d.U = +n[0], i + n[0].length) : -1; +function defaultX(d) { + return d[0]; } -function parseWeekNumberMonday(d, string, i) { - var n = numberRe.exec(string.slice(i)); - return n ? (d.W = +n[0], i + n[0].length) : -1; -} +var tree_x = function(_) { + return arguments.length ? (this._x = _, this) : this._x; +}; -function parseFullYear(d, string, i) { - var n = numberRe.exec(string.slice(i, i + 4)); - return n ? (d.y = +n[0], i + n[0].length) : -1; +function defaultY(d) { + return d[1]; } -function parseYear(d, string, i) { - var n = numberRe.exec(string.slice(i, i + 2)); - return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1; -} +var tree_y = function(_) { + return arguments.length ? (this._y = _, this) : this._y; +}; -function parseZone(d, string, i) { - var n = /^(Z)|([+-]\d\d)(?:\:?(\d\d))?/.exec(string.slice(i, i + 6)); - return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1; +function quadtree(nodes, x, y) { + var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN); + return nodes == null ? tree : tree.addAll(nodes); } -function parseMonthNumber(d, string, i) { - var n = numberRe.exec(string.slice(i, i + 2)); - return n ? (d.m = n[0] - 1, i + n[0].length) : -1; +function Quadtree(x, y, x0, y0, x1, y1) { + this._x = x; + this._y = y; + this._x0 = x0; + this._y0 = y0; + this._x1 = x1; + this._y1 = y1; + this._root = undefined; } -function parseDayOfMonth(d, string, i) { - var n = numberRe.exec(string.slice(i, i + 2)); - return n ? (d.d = +n[0], i + n[0].length) : -1; +function leaf_copy(leaf) { + var copy = {data: leaf.data}, next = copy; + while (leaf = leaf.next) next = next.next = {data: leaf.data}; + return copy; } -function parseDayOfYear(d, string, i) { - var n = numberRe.exec(string.slice(i, i + 3)); - return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1; -} +var treeProto = quadtree.prototype = Quadtree.prototype; -function parseHour24(d, string, i) { - var n = numberRe.exec(string.slice(i, i + 2)); - return n ? (d.H = +n[0], i + n[0].length) : -1; -} +treeProto.copy = function() { + var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1), + node = this._root, + nodes, + child; -function parseMinutes(d, string, i) { - var n = numberRe.exec(string.slice(i, i + 2)); - return n ? (d.M = +n[0], i + n[0].length) : -1; -} + if (!node) return copy; -function parseSeconds(d, string, i) { - var n = numberRe.exec(string.slice(i, i + 2)); - return n ? (d.S = +n[0], i + n[0].length) : -1; -} + if (!node.length) return copy._root = leaf_copy(node), copy; -function parseMilliseconds(d, string, i) { - var n = numberRe.exec(string.slice(i, i + 3)); - return n ? (d.L = +n[0], i + n[0].length) : -1; -} + nodes = [{source: node, target: copy._root = new Array(4)}]; + while (node = nodes.pop()) { + for (var i = 0; i < 4; ++i) { + if (child = node.source[i]) { + if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)}); + else node.target[i] = leaf_copy(child); + } + } + } -function parseLiteralPercent(d, string, i) { - var n = percentRe.exec(string.slice(i, i + 1)); - return n ? i + n[0].length : -1; -} + return copy; +}; -function formatDayOfMonth(d, p) { - return pad(d.getDate(), p, 2); -} +treeProto.add = tree_add; +treeProto.addAll = addAll; +treeProto.cover = tree_cover; +treeProto.data = tree_data; +treeProto.extent = tree_extent; +treeProto.find = tree_find; +treeProto.remove = tree_remove; +treeProto.removeAll = removeAll; +treeProto.root = tree_root; +treeProto.size = tree_size; +treeProto.visit = tree_visit; +treeProto.visitAfter = tree_visitAfter; +treeProto.x = tree_x; +treeProto.y = tree_y; -function formatHour24(d, p) { - return pad(d.getHours(), p, 2); +function x(d) { + return d.x + d.vx; } -function formatHour12(d, p) { - return pad(d.getHours() % 12 || 12, p, 2); +function y(d) { + return d.y + d.vy; } -function formatDayOfYear(d, p) { - return pad(1 + day.count(year(d), d), p, 3); -} +var collide = function(radius) { + var nodes, + radii, + strength = 1, + iterations = 1; -function formatMilliseconds(d, p) { - return pad(d.getMilliseconds(), p, 3); -} + if (typeof radius !== "function") radius = constant$6(radius == null ? 1 : +radius); -function formatMonthNumber(d, p) { - return pad(d.getMonth() + 1, p, 2); -} + function force() { + var i, n = nodes.length, + tree, + node, + xi, + yi, + ri, + ri2; -function formatMinutes(d, p) { - return pad(d.getMinutes(), p, 2); -} + for (var k = 0; k < iterations; ++k) { + tree = quadtree(nodes, x, y).visitAfter(prepare); + for (i = 0; i < n; ++i) { + node = nodes[i]; + ri = radii[node.index], ri2 = ri * ri; + xi = node.x + node.vx; + yi = node.y + node.vy; + tree.visit(apply); + } + } -function formatSeconds(d, p) { - return pad(d.getSeconds(), p, 2); -} + function apply(quad, x0, y0, x1, y1) { + var data = quad.data, rj = quad.r, r = ri + rj; + if (data) { + if (data.index > node.index) { + var x = xi - data.x - data.vx, + y = yi - data.y - data.vy, + l = x * x + y * y; + if (l < r * r) { + if (x === 0) x = jiggle(), l += x * x; + if (y === 0) y = jiggle(), l += y * y; + l = (r - (l = Math.sqrt(l))) / l * strength; + node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj)); + node.vy += (y *= l) * r; + data.vx -= x * (r = 1 - r); + data.vy -= y * r; + } + } + return; + } + return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r; + } + } -function formatWeekNumberSunday(d, p) { - return pad(sunday.count(year(d), d), p, 2); -} + function prepare(quad) { + if (quad.data) return quad.r = radii[quad.data.index]; + for (var i = quad.r = 0; i < 4; ++i) { + if (quad[i] && quad[i].r > quad.r) { + quad.r = quad[i].r; + } + } + } -function formatWeekdayNumber(d) { - return d.getDay(); -} + function initialize() { + if (!nodes) return; + var i, n = nodes.length, node; + radii = new Array(n); + for (i = 0; i < n; ++i) node = nodes[i], radii[node.index] = +radius(node, i, nodes); + } -function formatWeekNumberMonday(d, p) { - return pad(monday.count(year(d), d), p, 2); -} + force.initialize = function(_) { + nodes = _; + initialize(); + }; -function formatYear(d, p) { - return pad(d.getFullYear() % 100, p, 2); -} + force.iterations = function(_) { + return arguments.length ? (iterations = +_, force) : iterations; + }; -function formatFullYear(d, p) { - return pad(d.getFullYear() % 10000, p, 4); -} + force.strength = function(_) { + return arguments.length ? (strength = +_, force) : strength; + }; -function formatZone(d) { - var z = d.getTimezoneOffset(); - return (z > 0 ? "-" : (z *= -1, "+")) - + pad(z / 60 | 0, "0", 2) - + pad(z % 60, "0", 2); -} + force.radius = function(_) { + return arguments.length ? (radius = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : radius; + }; -function formatUTCDayOfMonth(d, p) { - return pad(d.getUTCDate(), p, 2); -} + return force; +}; -function formatUTCHour24(d, p) { - return pad(d.getUTCHours(), p, 2); +function index(d) { + return d.index; } -function formatUTCHour12(d, p) { - return pad(d.getUTCHours() % 12 || 12, p, 2); +function find(nodeById, nodeId) { + var node = nodeById.get(nodeId); + if (!node) throw new Error("missing: " + nodeId); + return node; } -function formatUTCDayOfYear(d, p) { - return pad(1 + utcDay.count(utcYear(d), d), p, 3); -} +var link = function(links) { + var id = index, + strength = defaultStrength, + strengths, + distance = constant$6(30), + distances, + nodes, + count, + bias, + iterations = 1; -function formatUTCMilliseconds(d, p) { - return pad(d.getUTCMilliseconds(), p, 3); -} + if (links == null) links = []; -function formatUTCMonthNumber(d, p) { - return pad(d.getUTCMonth() + 1, p, 2); -} + function defaultStrength(link) { + return 1 / Math.min(count[link.source.index], count[link.target.index]); + } -function formatUTCMinutes(d, p) { - return pad(d.getUTCMinutes(), p, 2); -} + function force(alpha) { + for (var k = 0, n = links.length; k < iterations; ++k) { + for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) { + link = links[i], source = link.source, target = link.target; + x = target.x + target.vx - source.x - source.vx || jiggle(); + y = target.y + target.vy - source.y - source.vy || jiggle(); + l = Math.sqrt(x * x + y * y); + l = (l - distances[i]) / l * alpha * strengths[i]; + x *= l, y *= l; + target.vx -= x * (b = bias[i]); + target.vy -= y * b; + source.vx += x * (b = 1 - b); + source.vy += y * b; + } + } + } -function formatUTCSeconds(d, p) { - return pad(d.getUTCSeconds(), p, 2); -} + function initialize() { + if (!nodes) return; -function formatUTCWeekNumberSunday(d, p) { - return pad(utcSunday.count(utcYear(d), d), p, 2); -} + var i, + n = nodes.length, + m = links.length, + nodeById = map$1(nodes, id), + link; -function formatUTCWeekdayNumber(d) { - return d.getUTCDay(); -} + for (i = 0, count = new Array(n); i < m; ++i) { + link = links[i], link.index = i; + if (typeof link.source !== "object") link.source = find(nodeById, link.source); + if (typeof link.target !== "object") link.target = find(nodeById, link.target); + count[link.source.index] = (count[link.source.index] || 0) + 1; + count[link.target.index] = (count[link.target.index] || 0) + 1; + } -function formatUTCWeekNumberMonday(d, p) { - return pad(utcMonday.count(utcYear(d), d), p, 2); -} + for (i = 0, bias = new Array(m); i < m; ++i) { + link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]); + } -function formatUTCYear(d, p) { - return pad(d.getUTCFullYear() % 100, p, 2); -} + strengths = new Array(m), initializeStrength(); + distances = new Array(m), initializeDistance(); + } -function formatUTCFullYear(d, p) { - return pad(d.getUTCFullYear() % 10000, p, 4); -} + function initializeStrength() { + if (!nodes) return; -function formatUTCZone() { - return "+0000"; -} + for (var i = 0, n = links.length; i < n; ++i) { + strengths[i] = +strength(links[i], i, links); + } + } -function formatLiteralPercent() { - return "%"; -} + function initializeDistance() { + if (!nodes) return; -var locale$2; + for (var i = 0, n = links.length; i < n; ++i) { + distances[i] = +distance(links[i], i, links); + } + } + force.initialize = function(_) { + nodes = _; + initialize(); + }; + force.links = function(_) { + return arguments.length ? (links = _, initialize(), force) : links; + }; + force.id = function(_) { + return arguments.length ? (id = _, force) : id; + }; + force.iterations = function(_) { + return arguments.length ? (iterations = +_, force) : iterations; + }; -defaultLocale$1({ - dateTime: "%x, %X", - date: "%-m/%-d/%Y", - time: "%-I:%M:%S %p", - periods: ["AM", "PM"], - days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"], - shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"], - months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"], - shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"] -}); + force.strength = function(_) { + return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initializeStrength(), force) : strength; + }; -function defaultLocale$1(definition) { - locale$2 = formatLocale$1(definition); - exports.timeFormat = locale$2.format; - exports.timeParse = locale$2.parse; - exports.utcFormat = locale$2.utcFormat; - exports.utcParse = locale$2.utcParse; - return locale$2; -} + force.distance = function(_) { + return arguments.length ? (distance = typeof _ === "function" ? _ : constant$6(+_), initializeDistance(), force) : distance; + }; -var isoSpecifier = "%Y-%m-%dT%H:%M:%S.%LZ"; + return force; +}; -function formatIsoNative(date) { - return date.toISOString(); +function x$1(d) { + return d.x; } -var formatIso = Date.prototype.toISOString - ? formatIsoNative - : exports.utcFormat(isoSpecifier); - -function parseIsoNative(string) { - var date = new Date(string); - return isNaN(date) ? null : date; +function y$1(d) { + return d.y; } -var parseIso = +new Date("2000-01-01T00:00:00.000Z") - ? parseIsoNative - : exports.utcParse(isoSpecifier); +var initialRadius = 10; +var initialAngle = Math.PI * (3 - Math.sqrt(5)); -var array$2 = Array.prototype; +var simulation = function(nodes) { + var simulation, + alpha = 1, + alphaMin = 0.001, + alphaDecay = 1 - Math.pow(alphaMin, 1 / 300), + alphaTarget = 0, + velocityDecay = 0.6, + forces = map$1(), + stepper = timer(step), + event = dispatch("tick", "end"); -var map$3 = array$2.map; -var slice$3 = array$2.slice; + if (nodes == null) nodes = []; -var implicit = {name: "implicit"}; + function step() { + tick(); + event.call("tick", simulation); + if (alpha < alphaMin) { + stepper.stop(); + event.call("end", simulation); + } + } -function ordinal(range) { - var index = map$1(), - domain = [], - unknown = implicit; + function tick() { + var i, n = nodes.length, node; - range = range == null ? [] : slice$3.call(range); + alpha += (alphaTarget - alpha) * alphaDecay; - function scale(d) { - var key = d + "", i = index.get(key); - if (!i) { - if (unknown !== implicit) return unknown; - index.set(key, i = domain.push(d)); + forces.each(function(force) { + force(alpha); + }); + + for (i = 0; i < n; ++i) { + node = nodes[i]; + if (node.fx == null) node.x += node.vx *= velocityDecay; + else node.x = node.fx, node.vx = 0; + if (node.fy == null) node.y += node.vy *= velocityDecay; + else node.y = node.fy, node.vy = 0; } - return range[(i - 1) % range.length]; } - scale.domain = function(_) { - if (!arguments.length) return domain.slice(); - domain = [], index = map$1(); - var i = -1, n = _.length, d, key; - while (++i < n) if (!index.has(key = (d = _[i]) + "")) index.set(key, domain.push(d)); - return scale; - }; + function initializeNodes() { + for (var i = 0, n = nodes.length, node; i < n; ++i) { + node = nodes[i], node.index = i; + if (isNaN(node.x) || isNaN(node.y)) { + var radius = initialRadius * Math.sqrt(i), angle = i * initialAngle; + node.x = radius * Math.cos(angle); + node.y = radius * Math.sin(angle); + } + if (isNaN(node.vx) || isNaN(node.vy)) { + node.vx = node.vy = 0; + } + } + } - scale.range = function(_) { - return arguments.length ? (range = slice$3.call(_), scale) : range.slice(); - }; + function initializeForce(force) { + if (force.initialize) force.initialize(nodes); + return force; + } + + initializeNodes(); + + return simulation = { + tick: tick, + + restart: function() { + return stepper.restart(step), simulation; + }, + + stop: function() { + return stepper.stop(), simulation; + }, + + nodes: function(_) { + return arguments.length ? (nodes = _, initializeNodes(), forces.each(initializeForce), simulation) : nodes; + }, - scale.unknown = function(_) { - return arguments.length ? (unknown = _, scale) : unknown; - }; + alpha: function(_) { + return arguments.length ? (alpha = +_, simulation) : alpha; + }, - scale.copy = function() { - return ordinal() - .domain(domain) - .range(range) - .unknown(unknown); - }; + alphaMin: function(_) { + return arguments.length ? (alphaMin = +_, simulation) : alphaMin; + }, - return scale; -} + alphaDecay: function(_) { + return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay; + }, -function band() { - var scale = ordinal().unknown(undefined), - domain = scale.domain, - ordinalRange = scale.range, - range$$1 = [0, 1], - step, - bandwidth, - round = false, - paddingInner = 0, - paddingOuter = 0, - align = 0.5; + alphaTarget: function(_) { + return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget; + }, - delete scale.unknown; + velocityDecay: function(_) { + return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay; + }, - function rescale() { - var n = domain().length, - reverse = range$$1[1] < range$$1[0], - start = range$$1[reverse - 0], - stop = range$$1[1 - reverse]; - step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2); - if (round) step = Math.floor(step); - start += (stop - start - step * (n - paddingInner)) * align; - bandwidth = step * (1 - paddingInner); - if (round) start = Math.round(start), bandwidth = Math.round(bandwidth); - var values = range(n).map(function(i) { return start + step * i; }); - return ordinalRange(reverse ? values.reverse() : values); - } + force: function(name, _) { + return arguments.length > 1 ? ((_ == null ? forces.remove(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name); + }, - scale.domain = function(_) { - return arguments.length ? (domain(_), rescale()) : domain(); - }; + find: function(x, y, radius) { + var i = 0, + n = nodes.length, + dx, + dy, + d2, + node, + closest; - scale.range = function(_) { - return arguments.length ? (range$$1 = [+_[0], +_[1]], rescale()) : range$$1.slice(); - }; + if (radius == null) radius = Infinity; + else radius *= radius; - scale.rangeRound = function(_) { - return range$$1 = [+_[0], +_[1]], round = true, rescale(); - }; + for (i = 0; i < n; ++i) { + node = nodes[i]; + dx = x - node.x; + dy = y - node.y; + d2 = dx * dx + dy * dy; + if (d2 < radius) closest = node, radius = d2; + } - scale.bandwidth = function() { - return bandwidth; - }; + return closest; + }, - scale.step = function() { - return step; + on: function(name, _) { + return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name); + } }; +}; - scale.round = function(_) { - return arguments.length ? (round = !!_, rescale()) : round; - }; +var manyBody = function() { + var nodes, + node, + alpha, + strength = constant$6(-30), + strengths, + distanceMin2 = 1, + distanceMax2 = Infinity, + theta2 = 0.81; - scale.padding = function(_) { - return arguments.length ? (paddingInner = paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingInner; - }; + function force(_) { + var i, n = nodes.length, tree = quadtree(nodes, x$1, y$1).visitAfter(accumulate); + for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply); + } - scale.paddingInner = function(_) { - return arguments.length ? (paddingInner = Math.max(0, Math.min(1, _)), rescale()) : paddingInner; - }; + function initialize() { + if (!nodes) return; + var i, n = nodes.length, node; + strengths = new Array(n); + for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes); + } - scale.paddingOuter = function(_) { - return arguments.length ? (paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingOuter; - }; + function accumulate(quad) { + var strength = 0, q, c, x$$1, y$$1, i; - scale.align = function(_) { - return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align; - }; + // For internal nodes, accumulate forces from child quadrants. + if (quad.length) { + for (x$$1 = y$$1 = i = 0; i < 4; ++i) { + if ((q = quad[i]) && (c = q.value)) { + strength += c, x$$1 += c * q.x, y$$1 += c * q.y; + } + } + quad.x = x$$1 / strength; + quad.y = y$$1 / strength; + } - scale.copy = function() { - return band() - .domain(domain()) - .range(range$$1) - .round(round) - .paddingInner(paddingInner) - .paddingOuter(paddingOuter) - .align(align); - }; + // For leaf nodes, accumulate forces from coincident quadrants. + else { + q = quad; + q.x = q.data.x; + q.y = q.data.y; + do strength += strengths[q.data.index]; + while (q = q.next); + } - return rescale(); -} + quad.value = strength; + } -function pointish(scale) { - var copy = scale.copy; + function apply(quad, x1, _, x2) { + if (!quad.value) return true; - scale.padding = scale.paddingOuter; - delete scale.paddingInner; - delete scale.paddingOuter; + var x$$1 = quad.x - node.x, + y$$1 = quad.y - node.y, + w = x2 - x1, + l = x$$1 * x$$1 + y$$1 * y$$1; - scale.copy = function() { - return pointish(copy()); - }; + // Apply the Barnes-Hut approximation if possible. + // Limit forces for very close nodes; randomize direction if coincident. + if (w * w / theta2 < l) { + if (l < distanceMax2) { + if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1; + if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1; + if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l); + node.vx += x$$1 * quad.value * alpha / l; + node.vy += y$$1 * quad.value * alpha / l; + } + return true; + } - return scale; -} + // Otherwise, process points directly. + else if (quad.length || l >= distanceMax2) return; -function point$4() { - return pointish(band().paddingInner(1)); -} + // Limit forces for very close nodes; randomize direction if coincident. + if (quad.data !== node || quad.next) { + if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1; + if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1; + if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l); + } -var constant$4 = function(x) { - return function() { - return x; - }; -}; + do if (quad.data !== node) { + w = strengths[quad.data.index] * alpha / l; + node.vx += x$$1 * w; + node.vy += y$$1 * w; + } while (quad = quad.next); + } -var number$1 = function(x) { - return +x; -}; + force.initialize = function(_) { + nodes = _; + initialize(); + }; -var unit = [0, 1]; + force.strength = function(_) { + return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength; + }; -function deinterpolateLinear(a, b) { - return (b -= (a = +a)) - ? function(x) { return (x - a) / b; } - : constant$4(b); -} + force.distanceMin = function(_) { + return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2); + }; -function deinterpolateClamp(deinterpolate) { - return function(a, b) { - var d = deinterpolate(a = +a, b = +b); - return function(x) { return x <= a ? 0 : x >= b ? 1 : d(x); }; + force.distanceMax = function(_) { + return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2); }; -} -function reinterpolateClamp(reinterpolate) { - return function(a, b) { - var r = reinterpolate(a = +a, b = +b); - return function(t) { return t <= 0 ? a : t >= 1 ? b : r(t); }; + force.theta = function(_) { + return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2); }; -} -function bimap(domain, range$$1, deinterpolate, reinterpolate) { - var d0 = domain[0], d1 = domain[1], r0 = range$$1[0], r1 = range$$1[1]; - if (d1 < d0) d0 = deinterpolate(d1, d0), r0 = reinterpolate(r1, r0); - else d0 = deinterpolate(d0, d1), r0 = reinterpolate(r0, r1); - return function(x) { return r0(d0(x)); }; -} + return force; +}; -function polymap(domain, range$$1, deinterpolate, reinterpolate) { - var j = Math.min(domain.length, range$$1.length) - 1, - d = new Array(j), - r = new Array(j), - i = -1; +var x$2 = function(x) { + var strength = constant$6(0.1), + nodes, + strengths, + xz; - // Reverse descending domains. - if (domain[j] < domain[0]) { - domain = domain.slice().reverse(); - range$$1 = range$$1.slice().reverse(); + if (typeof x !== "function") x = constant$6(x == null ? 0 : +x); + + function force(alpha) { + for (var i = 0, n = nodes.length, node; i < n; ++i) { + node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha; + } } - while (++i < j) { - d[i] = deinterpolate(domain[i], domain[i + 1]); - r[i] = reinterpolate(range$$1[i], range$$1[i + 1]); + function initialize() { + if (!nodes) return; + var i, n = nodes.length; + strengths = new Array(n); + xz = new Array(n); + for (i = 0; i < n; ++i) { + strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes); + } } - return function(x) { - var i = bisectRight(domain, x, 1, j) - 1; - return r[i](d[i](x)); + force.initialize = function(_) { + nodes = _; + initialize(); }; -} -function copy(source, target) { - return target - .domain(source.domain()) - .range(source.range()) - .interpolate(source.interpolate()) - .clamp(source.clamp()); -} + force.strength = function(_) { + return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength; + }; -// deinterpolate(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1]. -// reinterpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding domain value x in [a,b]. -function continuous(deinterpolate, reinterpolate) { - var domain = unit, - range$$1 = unit, - interpolate$$1 = interpolate, - clamp = false, - piecewise, - output, - input; + force.x = function(_) { + return arguments.length ? (x = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : x; + }; - function rescale() { - piecewise = Math.min(domain.length, range$$1.length) > 2 ? polymap : bimap; - output = input = null; - return scale; + return force; +}; + +var y$2 = function(y) { + var strength = constant$6(0.1), + nodes, + strengths, + yz; + + if (typeof y !== "function") y = constant$6(y == null ? 0 : +y); + + function force(alpha) { + for (var i = 0, n = nodes.length, node; i < n; ++i) { + node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha; + } } - function scale(x) { - return (output || (output = piecewise(domain, range$$1, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x); + function initialize() { + if (!nodes) return; + var i, n = nodes.length; + strengths = new Array(n); + yz = new Array(n); + for (i = 0; i < n; ++i) { + strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes); + } } - scale.invert = function(y) { - return (input || (input = piecewise(range$$1, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y); + force.initialize = function(_) { + nodes = _; + initialize(); }; - scale.domain = function(_) { - return arguments.length ? (domain = map$3.call(_, number$1), rescale()) : domain.slice(); + force.strength = function(_) { + return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength; }; - scale.range = function(_) { - return arguments.length ? (range$$1 = slice$3.call(_), rescale()) : range$$1.slice(); + force.y = function(_) { + return arguments.length ? (y = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : y; }; - scale.rangeRound = function(_) { - return range$$1 = slice$3.call(_), interpolate$$1 = interpolateRound, rescale(); - }; + return force; +}; - scale.clamp = function(_) { - return arguments.length ? (clamp = !!_, rescale()) : clamp; +// Computes the decimal coefficient and exponent of the specified number x with +// significant digits p, where x is positive and p is in [1, 21] or undefined. +// For example, formatDecimal(1.23) returns ["123", 0]. +var formatDecimal = function(x, p) { + if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity + var i, coefficient = x.slice(0, i); + + // The string returned by toExponential either has the form \d\.\d+e[-+]\d+ + // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3). + return [ + coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, + +x.slice(i + 1) + ]; +}; + +var exponent$1 = function(x) { + return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN; +}; + +var formatGroup = function(grouping, thousands) { + return function(value, width) { + var i = value.length, + t = [], + j = 0, + g = grouping[0], + length = 0; + + while (i > 0 && g > 0) { + if (length + g + 1 > width) g = Math.max(1, width - length); + t.push(value.substring(i -= g, i + g)); + if ((length += g + 1) > width) break; + g = grouping[j = (j + 1) % grouping.length]; + } + + return t.reverse().join(thousands); }; +}; - scale.interpolate = function(_) { - return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1; +var formatNumerals = function(numerals) { + return function(value) { + return value.replace(/[0-9]/g, function(i) { + return numerals[+i]; + }); }; +}; - return rescale(); -} +var formatDefault = function(x, p) { + x = x.toPrecision(p); -var tickFormat = function(domain, count, specifier) { - var start = domain[0], - stop = domain[domain.length - 1], - step = tickStep(start, stop, count == null ? 10 : count), - precision; - specifier = formatSpecifier(specifier == null ? ",f" : specifier); - switch (specifier.type) { - case "s": { - var value = Math.max(Math.abs(start), Math.abs(stop)); - if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision; - return exports.formatPrefix(specifier, value); - } - case "": - case "e": - case "g": - case "p": - case "r": { - if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e"); - break; - } - case "f": - case "%": { - if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2; - break; + out: for (var n = x.length, i = 1, i0 = -1, i1; i < n; ++i) { + switch (x[i]) { + case ".": i0 = i1 = i; break; + case "0": if (i0 === 0) i0 = i; i1 = i; break; + case "e": break out; + default: if (i0 > 0) i0 = 0; break; } } - return exports.format(specifier); + + return i0 > 0 ? x.slice(0, i0) + x.slice(i1 + 1) : x; }; -function linearish(scale) { - var domain = scale.domain; +var prefixExponent; - scale.ticks = function(count) { - var d = domain(); - return ticks(d[0], d[d.length - 1], count == null ? 10 : count); - }; +var formatPrefixAuto = function(x, p) { + var d = formatDecimal(x, p); + if (!d) return x + ""; + var coefficient = d[0], + exponent = d[1], + i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1, + n = coefficient.length; + return i === n ? coefficient + : i > n ? coefficient + new Array(i - n + 1).join("0") + : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i) + : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y! +}; - scale.tickFormat = function(count, specifier) { - return tickFormat(domain(), count, specifier); - }; +var formatRounded = function(x, p) { + var d = formatDecimal(x, p); + if (!d) return x + ""; + var coefficient = d[0], + exponent = d[1]; + return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient + : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1) + : coefficient + new Array(exponent - coefficient.length + 2).join("0"); +}; - scale.nice = function(count) { - var d = domain(), - i = d.length - 1, - n = count == null ? 10 : count, - start = d[0], - stop = d[i], - step = tickStep(start, stop, n); +var formatTypes = { + "": formatDefault, + "%": function(x, p) { return (x * 100).toFixed(p); }, + "b": function(x) { return Math.round(x).toString(2); }, + "c": function(x) { return x + ""; }, + "d": function(x) { return Math.round(x).toString(10); }, + "e": function(x, p) { return x.toExponential(p); }, + "f": function(x, p) { return x.toFixed(p); }, + "g": function(x, p) { return x.toPrecision(p); }, + "o": function(x) { return Math.round(x).toString(8); }, + "p": function(x, p) { return formatRounded(x * 100, p); }, + "r": formatRounded, + "s": formatPrefixAuto, + "X": function(x) { return Math.round(x).toString(16).toUpperCase(); }, + "x": function(x) { return Math.round(x).toString(16); } +}; - if (step) { - step = tickStep(Math.floor(start / step) * step, Math.ceil(stop / step) * step, n); - d[0] = Math.floor(start / step) * step; - d[i] = Math.ceil(stop / step) * step; - domain(d); - } +// [[fill]align][sign][symbol][0][width][,][.precision][type] +var re = /^(?:(.)?([<>=^]))?([+\-\( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?([a-z%])?$/i; + +function formatSpecifier(specifier) { + return new FormatSpecifier(specifier); +} + +formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof + +function FormatSpecifier(specifier) { + if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier); + + var match, + fill = match[1] || " ", + align = match[2] || ">", + sign = match[3] || "-", + symbol = match[4] || "", + zero = !!match[5], + width = match[6] && +match[6], + comma = !!match[7], + precision = match[8] && +match[8].slice(1), + type = match[9] || ""; + + // The "n" type is an alias for ",g". + if (type === "n") comma = true, type = "g"; + + // Map invalid types to the default format. + else if (!formatTypes[type]) type = ""; + + // If zero fill is specified, padding goes after sign and before digits. + if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "="; + + this.fill = fill; + this.align = align; + this.sign = sign; + this.symbol = symbol; + this.zero = zero; + this.width = width; + this.comma = comma; + this.precision = precision; + this.type = type; +} - return scale; - }; +FormatSpecifier.prototype.toString = function() { + return this.fill + + this.align + + this.sign + + this.symbol + + (this.zero ? "0" : "") + + (this.width == null ? "" : Math.max(1, this.width | 0)) + + (this.comma ? "," : "") + + (this.precision == null ? "" : "." + Math.max(0, this.precision | 0)) + + this.type; +}; - return scale; -} +var identity$3 = function(x) { + return x; +}; -function linear$2() { - var scale = continuous(deinterpolateLinear, interpolateNumber); +var prefixes = ["y","z","a","f","p","n","\xB5","m","","k","M","G","T","P","E","Z","Y"]; - scale.copy = function() { - return copy(scale, linear$2()); - }; +var formatLocale = function(locale) { + var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3, + currency = locale.currency, + decimal = locale.decimal, + numerals = locale.numerals ? formatNumerals(locale.numerals) : identity$3; - return linearish(scale); -} + function newFormat(specifier) { + specifier = formatSpecifier(specifier); -function identity$4() { - var domain = [0, 1]; + var fill = specifier.fill, + align = specifier.align, + sign = specifier.sign, + symbol = specifier.symbol, + zero = specifier.zero, + width = specifier.width, + comma = specifier.comma, + precision = specifier.precision, + type = specifier.type; - function scale(x) { - return +x; - } + // Compute the prefix and suffix. + // For SI-prefix, the suffix is lazily computed. + var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "", + suffix = symbol === "$" ? currency[1] : /[%p]/.test(type) ? "%" : ""; - scale.invert = scale; + // What format function should we use? + // Is this an integer type? + // Can this type generate exponential notation? + var formatType = formatTypes[type], + maybeSuffix = !type || /[defgprs%]/.test(type); - scale.domain = scale.range = function(_) { - return arguments.length ? (domain = map$3.call(_, number$1), scale) : domain.slice(); - }; + // Set the default precision if not specified, + // or clamp the specified precision to the supported range. + // For significant precision, it must be in [1, 21]. + // For fixed precision, it must be in [0, 20]. + precision = precision == null ? (type ? 6 : 12) + : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) + : Math.max(0, Math.min(20, precision)); - scale.copy = function() { - return identity$4().domain(domain); - }; + function format(value) { + var valuePrefix = prefix, + valueSuffix = suffix, + i, n, c; - return linearish(scale); -} + if (type === "c") { + valueSuffix = formatType(value) + valueSuffix; + value = ""; + } else { + value = +value; -var nice = function(domain, interval) { - domain = domain.slice(); + // Perform the initial formatting. + var valueNegative = value < 0; + value = formatType(Math.abs(value), precision); - var i0 = 0, - i1 = domain.length - 1, - x0 = domain[i0], - x1 = domain[i1], - t; + // If a negative value rounds to zero during formatting, treat as positive. + if (valueNegative && +value === 0) valueNegative = false; - if (x1 < x0) { - t = i0, i0 = i1, i1 = t; - t = x0, x0 = x1, x1 = t; - } + // Compute the prefix and suffix. + valuePrefix = (valueNegative ? (sign === "(" ? sign : "-") : sign === "-" || sign === "(" ? "" : sign) + valuePrefix; + valueSuffix = valueSuffix + (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + (valueNegative && sign === "(" ? ")" : ""); - domain[i0] = interval.floor(x0); - domain[i1] = interval.ceil(x1); - return domain; -}; + // Break the formatted value into the integer “value” part that can be + // grouped, and fractional or exponential “suffix” part that is not. + if (maybeSuffix) { + i = -1, n = value.length; + while (++i < n) { + if (c = value.charCodeAt(i), 48 > c || c > 57) { + valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix; + value = value.slice(0, i); + break; + } + } + } + } -function deinterpolate(a, b) { - return (b = Math.log(b / a)) - ? function(x) { return Math.log(x / a) / b; } - : constant$4(b); -} + // If the fill character is not "0", grouping is applied before padding. + if (comma && !zero) value = group(value, Infinity); -function reinterpolate(a, b) { - return a < 0 - ? function(t) { return -Math.pow(-b, t) * Math.pow(-a, 1 - t); } - : function(t) { return Math.pow(b, t) * Math.pow(a, 1 - t); }; -} + // Compute the padding. + var length = valuePrefix.length + value.length + valueSuffix.length, + padding = length < width ? new Array(width - length + 1).join(fill) : ""; -function pow10(x) { - return isFinite(x) ? +("1e" + x) : x < 0 ? 0 : x; -} + // If the fill character is "0", grouping is applied after padding. + if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; -function powp(base) { - return base === 10 ? pow10 - : base === Math.E ? Math.exp - : function(x) { return Math.pow(base, x); }; -} + // Reconstruct the final output based on the desired alignment. + switch (align) { + case "<": value = valuePrefix + value + valueSuffix + padding; break; + case "=": value = valuePrefix + padding + value + valueSuffix; break; + case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break; + default: value = padding + valuePrefix + value + valueSuffix; break; + } -function logp(base) { - return base === Math.E ? Math.log - : base === 10 && Math.log10 - || base === 2 && Math.log2 - || (base = Math.log(base), function(x) { return Math.log(x) / base; }); -} + return numerals(value); + } -function reflect(f) { - return function(x) { - return -f(-x); - }; -} + format.toString = function() { + return specifier + ""; + }; -function log() { - var scale = continuous(deinterpolate, reinterpolate).domain([1, 10]), - domain = scale.domain, - base = 10, - logs = logp(10), - pows = powp(10); + return format; + } - function rescale() { - logs = logp(base), pows = powp(base); - if (domain()[0] < 0) logs = reflect(logs), pows = reflect(pows); - return scale; + function formatPrefix(specifier, value) { + var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)), + e = Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3, + k = Math.pow(10, -e), + prefix = prefixes[8 + e / 3]; + return function(value) { + return f(k * value) + prefix; + }; } - scale.base = function(_) { - return arguments.length ? (base = +_, rescale()) : base; + return { + format: newFormat, + formatPrefix: formatPrefix }; +}; - scale.domain = function(_) { - return arguments.length ? (domain(_), rescale()) : domain(); - }; +var locale$1; - scale.ticks = function(count) { - var d = domain(), - u = d[0], - v = d[d.length - 1], - r; - if (r = v < u) i = u, u = v, v = i; - var i = logs(u), - j = logs(v), - p, - k, - t, - n = count == null ? 10 : +count, - z = []; +defaultLocale({ + decimal: ".", + thousands: ",", + grouping: [3], + currency: ["$", ""] +}); - if (!(base % 1) && j - i < n) { - i = Math.round(i) - 1, j = Math.round(j) + 1; - if (u > 0) for (; i < j; ++i) { - for (k = 1, p = pows(i); k < base; ++k) { - t = p * k; - if (t < u) continue; - if (t > v) break; - z.push(t); - } - } else for (; i < j; ++i) { - for (k = base - 1, p = pows(i); k >= 1; --k) { - t = p * k; - if (t < u) continue; - if (t > v) break; - z.push(t); - } - } - } else { - z = ticks(i, j, Math.min(j - i, n)).map(pows); - } +function defaultLocale(definition) { + locale$1 = formatLocale(definition); + exports.format = locale$1.format; + exports.formatPrefix = locale$1.formatPrefix; + return locale$1; +} - return r ? z.reverse() : z; - }; +var precisionFixed = function(step) { + return Math.max(0, -exponent$1(Math.abs(step))); +}; - scale.tickFormat = function(count, specifier) { - if (specifier == null) specifier = base === 10 ? ".0e" : ","; - if (typeof specifier !== "function") specifier = exports.format(specifier); - if (count === Infinity) return specifier; - if (count == null) count = 10; - var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate? - return function(d) { - var i = d / pows(Math.round(logs(d))); - if (i * base < base - 0.5) i *= base; - return i <= k ? specifier(d) : ""; - }; - }; +var precisionPrefix = function(step, value) { + return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3 - exponent$1(Math.abs(step))); +}; - scale.nice = function() { - return domain(nice(domain(), { - floor: function(x) { return pows(Math.floor(logs(x))); }, - ceil: function(x) { return pows(Math.ceil(logs(x))); } - })); - }; +var precisionRound = function(step, max) { + step = Math.abs(step), max = Math.abs(max) - step; + return Math.max(0, exponent$1(max) - exponent$1(step)) + 1; +}; - scale.copy = function() { - return copy(scale, log().base(base)); - }; +// Adds floating point numbers with twice the normal precision. +// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and +// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3) +// 305–363 (1997). +// Code adapted from GeographicLib by Charles F. F. Karney, +// http://geographiclib.sourceforge.net/ - return scale; +var adder = function() { + return new Adder; +}; + +function Adder() { + this.reset(); } -function raise(x, exponent) { - return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent); +Adder.prototype = { + constructor: Adder, + reset: function() { + this.s = // rounded value + this.t = 0; // exact error + }, + add: function(y) { + add$1(temp, y, this.t); + add$1(this, temp.s, this.s); + if (this.s) this.t += temp.t; + else this.s = temp.t; + }, + valueOf: function() { + return this.s; + } +}; + +var temp = new Adder; + +function add$1(adder, a, b) { + var x = adder.s = a + b, + bv = x - a, + av = x - bv; + adder.t = (a - av) + (b - bv); } -function pow() { - var exponent = 1, - scale = continuous(deinterpolate, reinterpolate), - domain = scale.domain; +var epsilon$2 = 1e-6; +var epsilon2$1 = 1e-12; +var pi$3 = Math.PI; +var halfPi$2 = pi$3 / 2; +var quarterPi = pi$3 / 4; +var tau$3 = pi$3 * 2; - function deinterpolate(a, b) { - return (b = raise(b, exponent) - (a = raise(a, exponent))) - ? function(x) { return (raise(x, exponent) - a) / b; } - : constant$4(b); - } +var degrees$1 = 180 / pi$3; +var radians = pi$3 / 180; - function reinterpolate(a, b) { - b = raise(b, exponent) - (a = raise(a, exponent)); - return function(t) { return raise(a + b * t, 1 / exponent); }; - } +var abs = Math.abs; +var atan = Math.atan; +var atan2 = Math.atan2; +var cos$1 = Math.cos; +var ceil = Math.ceil; +var exp = Math.exp; - scale.exponent = function(_) { - return arguments.length ? (exponent = +_, domain(domain())) : exponent; - }; +var log = Math.log; +var pow = Math.pow; +var sin$1 = Math.sin; +var sign = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; }; +var sqrt = Math.sqrt; +var tan = Math.tan; - scale.copy = function() { - return copy(scale, pow().exponent(exponent)); - }; +function acos(x) { + return x > 1 ? 0 : x < -1 ? pi$3 : Math.acos(x); +} - return linearish(scale); +function asin(x) { + return x > 1 ? halfPi$2 : x < -1 ? -halfPi$2 : Math.asin(x); } -function sqrt() { - return pow().exponent(0.5); +function haversin(x) { + return (x = sin$1(x / 2)) * x; } -function quantile$$1() { - var domain = [], - range$$1 = [], - thresholds = []; +function noop$1() {} - function rescale() { - var i = 0, n = Math.max(1, range$$1.length); - thresholds = new Array(n - 1); - while (++i < n) thresholds[i - 1] = threshold(domain, i / n); - return scale; +function streamGeometry(geometry, stream) { + if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) { + streamGeometryType[geometry.type](geometry, stream); } +} - function scale(x) { - if (!isNaN(x = +x)) return range$$1[bisectRight(thresholds, x)]; +var streamObjectType = { + Feature: function(object, stream) { + streamGeometry(object.geometry, stream); + }, + FeatureCollection: function(object, stream) { + var features = object.features, i = -1, n = features.length; + while (++i < n) streamGeometry(features[i].geometry, stream); } +}; - scale.invertExtent = function(y) { - var i = range$$1.indexOf(y); - return i < 0 ? [NaN, NaN] : [ - i > 0 ? thresholds[i - 1] : domain[0], - i < thresholds.length ? thresholds[i] : domain[domain.length - 1] - ]; - }; - - scale.domain = function(_) { - if (!arguments.length) return domain.slice(); - domain = []; - for (var i = 0, n = _.length, d; i < n; ++i) if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d); - domain.sort(ascending); - return rescale(); - }; - - scale.range = function(_) { - return arguments.length ? (range$$1 = slice$3.call(_), rescale()) : range$$1.slice(); - }; - - scale.quantiles = function() { - return thresholds.slice(); - }; - - scale.copy = function() { - return quantile$$1() - .domain(domain) - .range(range$$1); - }; +var streamGeometryType = { + Sphere: function(object, stream) { + stream.sphere(); + }, + Point: function(object, stream) { + object = object.coordinates; + stream.point(object[0], object[1], object[2]); + }, + MultiPoint: function(object, stream) { + var coordinates = object.coordinates, i = -1, n = coordinates.length; + while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]); + }, + LineString: function(object, stream) { + streamLine(object.coordinates, stream, 0); + }, + MultiLineString: function(object, stream) { + var coordinates = object.coordinates, i = -1, n = coordinates.length; + while (++i < n) streamLine(coordinates[i], stream, 0); + }, + Polygon: function(object, stream) { + streamPolygon(object.coordinates, stream); + }, + MultiPolygon: function(object, stream) { + var coordinates = object.coordinates, i = -1, n = coordinates.length; + while (++i < n) streamPolygon(coordinates[i], stream); + }, + GeometryCollection: function(object, stream) { + var geometries = object.geometries, i = -1, n = geometries.length; + while (++i < n) streamGeometry(geometries[i], stream); + } +}; - return scale; +function streamLine(coordinates, stream, closed) { + var i = -1, n = coordinates.length - closed, coordinate; + stream.lineStart(); + while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]); + stream.lineEnd(); } -function quantize$1() { - var x0 = 0, - x1 = 1, - n = 1, - domain = [0.5], - range$$1 = [0, 1]; - - function scale(x) { - if (x <= x) return range$$1[bisectRight(domain, x, 0, n)]; - } +function streamPolygon(coordinates, stream) { + var i = -1, n = coordinates.length; + stream.polygonStart(); + while (++i < n) streamLine(coordinates[i], stream, 1); + stream.polygonEnd(); +} - function rescale() { - var i = -1; - domain = new Array(n); - while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1); - return scale; +var geoStream = function(object, stream) { + if (object && streamObjectType.hasOwnProperty(object.type)) { + streamObjectType[object.type](object, stream); + } else { + streamGeometry(object, stream); } +}; - scale.domain = function(_) { - return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1]; - }; +var areaRingSum = adder(); - scale.range = function(_) { - return arguments.length ? (n = (range$$1 = slice$3.call(_)).length - 1, rescale()) : range$$1.slice(); - }; +var areaSum = adder(); +var lambda00; +var phi00; +var lambda0; +var cosPhi0; +var sinPhi0; - scale.invertExtent = function(y) { - var i = range$$1.indexOf(y); - return i < 0 ? [NaN, NaN] - : i < 1 ? [x0, domain[0]] - : i >= n ? [domain[n - 1], x1] - : [domain[i - 1], domain[i]]; - }; +var areaStream = { + point: noop$1, + lineStart: noop$1, + lineEnd: noop$1, + polygonStart: function() { + areaRingSum.reset(); + areaStream.lineStart = areaRingStart; + areaStream.lineEnd = areaRingEnd; + }, + polygonEnd: function() { + var areaRing = +areaRingSum; + areaSum.add(areaRing < 0 ? tau$3 + areaRing : areaRing); + this.lineStart = this.lineEnd = this.point = noop$1; + }, + sphere: function() { + areaSum.add(tau$3); + } +}; - scale.copy = function() { - return quantize$1() - .domain([x0, x1]) - .range(range$$1); - }; +function areaRingStart() { + areaStream.point = areaPointFirst; +} - return linearish(scale); +function areaRingEnd() { + areaPoint(lambda00, phi00); } -function threshold$1() { - var domain = [0.5], - range$$1 = [0, 1], - n = 1; +function areaPointFirst(lambda, phi) { + areaStream.point = areaPoint; + lambda00 = lambda, phi00 = phi; + lambda *= radians, phi *= radians; + lambda0 = lambda, cosPhi0 = cos$1(phi = phi / 2 + quarterPi), sinPhi0 = sin$1(phi); +} - function scale(x) { - if (x <= x) return range$$1[bisectRight(domain, x, 0, n)]; - } +function areaPoint(lambda, phi) { + lambda *= radians, phi *= radians; + phi = phi / 2 + quarterPi; // half the angular distance from south pole - scale.domain = function(_) { - return arguments.length ? (domain = slice$3.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : domain.slice(); - }; + // Spherical excess E for a spherical triangle with vertices: south pole, + // previous point, current point. Uses a formula derived from Cagnoli’s + // theorem. See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2). + var dLambda = lambda - lambda0, + sdLambda = dLambda >= 0 ? 1 : -1, + adLambda = sdLambda * dLambda, + cosPhi = cos$1(phi), + sinPhi = sin$1(phi), + k = sinPhi0 * sinPhi, + u = cosPhi0 * cosPhi + k * cos$1(adLambda), + v = k * sdLambda * sin$1(adLambda); + areaRingSum.add(atan2(v, u)); - scale.range = function(_) { - return arguments.length ? (range$$1 = slice$3.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : range$$1.slice(); - }; + // Advance the previous points. + lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi; +} - scale.invertExtent = function(y) { - var i = range$$1.indexOf(y); - return [domain[i - 1], domain[i]]; - }; +var area = function(object) { + areaSum.reset(); + geoStream(object, areaStream); + return areaSum * 2; +}; - scale.copy = function() { - return threshold$1() - .domain(domain) - .range(range$$1); - }; +function spherical(cartesian) { + return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])]; +} - return scale; +function cartesian(spherical) { + var lambda = spherical[0], phi = spherical[1], cosPhi = cos$1(phi); + return [cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)]; } -var durationSecond$1 = 1000; -var durationMinute$1 = durationSecond$1 * 60; -var durationHour$1 = durationMinute$1 * 60; -var durationDay$1 = durationHour$1 * 24; -var durationWeek$1 = durationDay$1 * 7; -var durationMonth = durationDay$1 * 30; -var durationYear = durationDay$1 * 365; +function cartesianDot(a, b) { + return a[0] * b[0] + a[1] * b[1] + a[2] * b[2]; +} -function date$1(t) { - return new Date(t); +function cartesianCross(a, b) { + return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]]; } -function number$2(t) { - return t instanceof Date ? +t : +new Date(+t); +// TODO return a +function cartesianAddInPlace(a, b) { + a[0] += b[0], a[1] += b[1], a[2] += b[2]; } -function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format) { - var scale = continuous(deinterpolateLinear, interpolateNumber), - invert = scale.invert, - domain = scale.domain; +function cartesianScale(vector, k) { + return [vector[0] * k, vector[1] * k, vector[2] * k]; +} - var formatMillisecond = format(".%L"), - formatSecond = format(":%S"), - formatMinute = format("%I:%M"), - formatHour = format("%I %p"), - formatDay = format("%a %d"), - formatWeek = format("%b %d"), - formatMonth = format("%B"), - formatYear = format("%Y"); +// TODO return d +function cartesianNormalizeInPlace(d) { + var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]); + d[0] /= l, d[1] /= l, d[2] /= l; +} - var tickIntervals = [ - [second$$1, 1, durationSecond$1], - [second$$1, 5, 5 * durationSecond$1], - [second$$1, 15, 15 * durationSecond$1], - [second$$1, 30, 30 * durationSecond$1], - [minute$$1, 1, durationMinute$1], - [minute$$1, 5, 5 * durationMinute$1], - [minute$$1, 15, 15 * durationMinute$1], - [minute$$1, 30, 30 * durationMinute$1], - [ hour$$1, 1, durationHour$1 ], - [ hour$$1, 3, 3 * durationHour$1 ], - [ hour$$1, 6, 6 * durationHour$1 ], - [ hour$$1, 12, 12 * durationHour$1 ], - [ day$$1, 1, durationDay$1 ], - [ day$$1, 2, 2 * durationDay$1 ], - [ week, 1, durationWeek$1 ], - [ month$$1, 1, durationMonth ], - [ month$$1, 3, 3 * durationMonth ], - [ year$$1, 1, durationYear ] - ]; +var lambda0$1; +var phi0; +var lambda1; +var phi1; +var lambda2; +var lambda00$1; +var phi00$1; +var p0; +var deltaSum = adder(); +var ranges; +var range; - function tickFormat(date) { - return (second$$1(date) < date ? formatMillisecond - : minute$$1(date) < date ? formatSecond - : hour$$1(date) < date ? formatMinute - : day$$1(date) < date ? formatHour - : month$$1(date) < date ? (week(date) < date ? formatDay : formatWeek) - : year$$1(date) < date ? formatMonth - : formatYear)(date); +var boundsStream = { + point: boundsPoint, + lineStart: boundsLineStart, + lineEnd: boundsLineEnd, + polygonStart: function() { + boundsStream.point = boundsRingPoint; + boundsStream.lineStart = boundsRingStart; + boundsStream.lineEnd = boundsRingEnd; + deltaSum.reset(); + areaStream.polygonStart(); + }, + polygonEnd: function() { + areaStream.polygonEnd(); + boundsStream.point = boundsPoint; + boundsStream.lineStart = boundsLineStart; + boundsStream.lineEnd = boundsLineEnd; + if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90); + else if (deltaSum > epsilon$2) phi1 = 90; + else if (deltaSum < -epsilon$2) phi0 = -90; + range[0] = lambda0$1, range[1] = lambda1; } +}; - function tickInterval(interval, start, stop, step) { - if (interval == null) interval = 10; +function boundsPoint(lambda, phi) { + ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]); + if (phi < phi0) phi0 = phi; + if (phi > phi1) phi1 = phi; +} - // If a desired tick count is specified, pick a reasonable tick interval - // based on the extent of the domain and a rough estimate of tick size. - // Otherwise, assume interval is already a time interval and use it. - if (typeof interval === "number") { - var target = Math.abs(stop - start) / interval, - i = bisector(function(i) { return i[2]; }).right(tickIntervals, target); - if (i === tickIntervals.length) { - step = tickStep(start / durationYear, stop / durationYear, interval); - interval = year$$1; - } else if (i) { - i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i]; - step = i[1]; - interval = i[0]; +function linePoint(lambda, phi) { + var p = cartesian([lambda * radians, phi * radians]); + if (p0) { + var normal = cartesianCross(p0, p), + equatorial = [normal[1], -normal[0], 0], + inflection = cartesianCross(equatorial, normal); + cartesianNormalizeInPlace(inflection); + inflection = spherical(inflection); + var delta = lambda - lambda2, + sign$$1 = delta > 0 ? 1 : -1, + lambdai = inflection[0] * degrees$1 * sign$$1, + phii, + antimeridian = abs(delta) > 180; + if (antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) { + phii = inflection[1] * degrees$1; + if (phii > phi1) phi1 = phii; + } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) { + phii = -inflection[1] * degrees$1; + if (phii < phi0) phi0 = phii; + } else { + if (phi < phi0) phi0 = phi; + if (phi > phi1) phi1 = phi; + } + if (antimeridian) { + if (lambda < lambda2) { + if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda; } else { - step = tickStep(start, stop, interval); - interval = millisecond$$1; + if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda; + } + } else { + if (lambda1 >= lambda0$1) { + if (lambda < lambda0$1) lambda0$1 = lambda; + if (lambda > lambda1) lambda1 = lambda; + } else { + if (lambda > lambda2) { + if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda; + } else { + if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda; + } } } + } else { + ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]); + } + if (phi < phi0) phi0 = phi; + if (phi > phi1) phi1 = phi; + p0 = p, lambda2 = lambda; +} - return step == null ? interval : interval.every(step); +function boundsLineStart() { + boundsStream.point = linePoint; +} + +function boundsLineEnd() { + range[0] = lambda0$1, range[1] = lambda1; + boundsStream.point = boundsPoint; + p0 = null; +} + +function boundsRingPoint(lambda, phi) { + if (p0) { + var delta = lambda - lambda2; + deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta); + } else { + lambda00$1 = lambda, phi00$1 = phi; } + areaStream.point(lambda, phi); + linePoint(lambda, phi); +} - scale.invert = function(y) { - return new Date(invert(y)); - }; +function boundsRingStart() { + areaStream.lineStart(); +} - scale.domain = function(_) { - return arguments.length ? domain(map$3.call(_, number$2)) : domain().map(date$1); - }; +function boundsRingEnd() { + boundsRingPoint(lambda00$1, phi00$1); + areaStream.lineEnd(); + if (abs(deltaSum) > epsilon$2) lambda0$1 = -(lambda1 = 180); + range[0] = lambda0$1, range[1] = lambda1; + p0 = null; +} - scale.ticks = function(interval, step) { - var d = domain(), - t0 = d[0], - t1 = d[d.length - 1], - r = t1 < t0, - t; - if (r) t = t0, t0 = t1, t1 = t; - t = tickInterval(interval, t0, t1, step); - t = t ? t.range(t0, t1 + 1) : []; // inclusive stop - return r ? t.reverse() : t; - }; +// Finds the left-right distance between two longitudes. +// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want +// the distance between ±180° to be 360°. +function angle(lambda0, lambda1) { + return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1; +} - scale.tickFormat = function(count, specifier) { - return specifier == null ? tickFormat : format(specifier); - }; +function rangeCompare(a, b) { + return a[0] - b[0]; +} - scale.nice = function(interval, step) { - var d = domain(); - return (interval = tickInterval(interval, d[0], d[d.length - 1], step)) - ? domain(nice(d, interval)) - : scale; - }; +function rangeContains(range, x) { + return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x; +} - scale.copy = function() { - return copy(scale, calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format)); - }; +var bounds = function(feature) { + var i, n, a, b, merged, deltaMax, delta; + + phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity); + ranges = []; + geoStream(feature, boundsStream); + + // First, sort ranges by their minimum longitudes. + if (n = ranges.length) { + ranges.sort(rangeCompare); + + // Then, merge any ranges that overlap. + for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) { + b = ranges[i]; + if (rangeContains(a, b[0]) || rangeContains(a, b[1])) { + if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1]; + if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0]; + } else { + merged.push(a = b); + } + } + + // Finally, find the largest gap between the merged ranges. + // The final bounding box will be the inverse of this gap. + for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) { + b = merged[i]; + if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1]; + } + } - return scale; -} + ranges = range = null; -var time = function() { - return calendar(year, month, sunday, day, hour, minute, second, millisecond, exports.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]); + return lambda0$1 === Infinity || phi0 === Infinity + ? [[NaN, NaN], [NaN, NaN]] + : [[lambda0$1, phi0], [lambda1, phi1]]; }; -var utcTime = function() { - return calendar(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute, second, millisecond, exports.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]); -}; +var W0; +var W1; +var X0; +var Y0; +var Z0; +var X1; +var Y1; +var Z1; +var X2; +var Y2; +var Z2; +var lambda00$2; +var phi00$2; +var x0; +var y0; +var z0; // previous point -var colors = function(s) { - return s.match(/.{6}/g).map(function(x) { - return "#" + x; - }); +var centroidStream = { + sphere: noop$1, + point: centroidPoint, + lineStart: centroidLineStart, + lineEnd: centroidLineEnd, + polygonStart: function() { + centroidStream.lineStart = centroidRingStart; + centroidStream.lineEnd = centroidRingEnd; + }, + polygonEnd: function() { + centroidStream.lineStart = centroidLineStart; + centroidStream.lineEnd = centroidLineEnd; + } }; -var category10 = colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf"); - -var category20b = colors("393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6"); - -var category20c = colors("3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9"); - -var category20 = colors("1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5"); +// Arithmetic mean of Cartesian vectors. +function centroidPoint(lambda, phi) { + lambda *= radians, phi *= radians; + var cosPhi = cos$1(phi); + centroidPointCartesian(cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)); +} -var cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0)); +function centroidPointCartesian(x, y, z) { + ++W0; + X0 += (x - X0) / W0; + Y0 += (y - Y0) / W0; + Z0 += (z - Z0) / W0; +} -var warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8)); +function centroidLineStart() { + centroidStream.point = centroidLinePointFirst; +} -var cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8)); +function centroidLinePointFirst(lambda, phi) { + lambda *= radians, phi *= radians; + var cosPhi = cos$1(phi); + x0 = cosPhi * cos$1(lambda); + y0 = cosPhi * sin$1(lambda); + z0 = sin$1(phi); + centroidStream.point = centroidLinePoint; + centroidPointCartesian(x0, y0, z0); +} -var rainbow = cubehelix(); +function centroidLinePoint(lambda, phi) { + lambda *= radians, phi *= radians; + var cosPhi = cos$1(phi), + x = cosPhi * cos$1(lambda), + y = cosPhi * sin$1(lambda), + z = sin$1(phi), + w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z); + W1 += w; + X1 += w * (x0 + (x0 = x)); + Y1 += w * (y0 + (y0 = y)); + Z1 += w * (z0 + (z0 = z)); + centroidPointCartesian(x0, y0, z0); +} -var rainbow$1 = function(t) { - if (t < 0 || t > 1) t -= Math.floor(t); - var ts = Math.abs(t - 0.5); - rainbow.h = 360 * t - 100; - rainbow.s = 1.5 - 1.5 * ts; - rainbow.l = 0.8 - 0.9 * ts; - return rainbow + ""; -}; +function centroidLineEnd() { + centroidStream.point = centroidPoint; +} -function ramp(range) { - var n = range.length; - return function(t) { - return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))]; - }; +// See J. E. Brock, The Inertia Tensor for a Spherical Triangle, +// J. Applied Mechanics 42, 239 (1975). +function centroidRingStart() { + centroidStream.point = centroidRingPointFirst; } -var viridis = ramp(colors("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")); +function centroidRingEnd() { + centroidRingPoint(lambda00$2, phi00$2); + centroidStream.point = centroidPoint; +} -var magma = ramp(colors("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")); +function centroidRingPointFirst(lambda, phi) { + lambda00$2 = lambda, phi00$2 = phi; + lambda *= radians, phi *= radians; + centroidStream.point = centroidRingPoint; + var cosPhi = cos$1(phi); + x0 = cosPhi * cos$1(lambda); + y0 = cosPhi * sin$1(lambda); + z0 = sin$1(phi); + centroidPointCartesian(x0, y0, z0); +} -var inferno = ramp(colors("00000401000501010601010802010a02020c02020e03021004031204031405041706041907051b08051d09061f0a07220b07240c08260d08290e092b10092d110a30120a32140b34150b37160b39180c3c190c3e1b0c411c0c431e0c451f0c48210c4a230c4c240c4f260c51280b53290b552b0b572d0b592f0a5b310a5c320a5e340a5f3609613809623909633b09643d09653e0966400a67420a68440a68450a69470b6a490b6a4a0c6b4c0c6b4d0d6c4f0d6c510e6c520e6d540f6d550f6d57106e59106e5a116e5c126e5d126e5f136e61136e62146e64156e65156e67166e69166e6a176e6c186e6d186e6f196e71196e721a6e741a6e751b6e771c6d781c6d7a1d6d7c1d6d7d1e6d7f1e6c801f6c82206c84206b85216b87216b88226a8a226a8c23698d23698f24699025689225689326679526679727669827669a28659b29649d29649f2a63a02a63a22b62a32c61a52c60a62d60a82e5fa92e5eab2f5ead305dae305cb0315bb1325ab3325ab43359b63458b73557b93556ba3655bc3754bd3853bf3952c03a51c13a50c33b4fc43c4ec63d4dc73e4cc83f4bca404acb4149cc4248ce4347cf4446d04545d24644d34743d44842d54a41d74b3fd84c3ed94d3dda4e3cdb503bdd513ade5238df5337e05536e15635e25734e35933e45a31e55c30e65d2fe75e2ee8602de9612bea632aeb6429eb6628ec6726ed6925ee6a24ef6c23ef6e21f06f20f1711ff1731df2741cf3761bf37819f47918f57b17f57d15f67e14f68013f78212f78410f8850ff8870ef8890cf98b0bf98c0af98e09fa9008fa9207fa9407fb9606fb9706fb9906fb9b06fb9d07fc9f07fca108fca309fca50afca60cfca80dfcaa0ffcac11fcae12fcb014fcb216fcb418fbb61afbb81dfbba1ffbbc21fbbe23fac026fac228fac42afac62df9c72ff9c932f9cb35f8cd37f8cf3af7d13df7d340f6d543f6d746f5d949f5db4cf4dd4ff4df53f4e156f3e35af3e55df2e661f2e865f2ea69f1ec6df1ed71f1ef75f1f179f2f27df2f482f3f586f3f68af4f88ef5f992f6fa96f8fb9af9fc9dfafda1fcffa4")); +function centroidRingPoint(lambda, phi) { + lambda *= radians, phi *= radians; + var cosPhi = cos$1(phi), + x = cosPhi * cos$1(lambda), + y = cosPhi * sin$1(lambda), + z = sin$1(phi), + cx = y0 * z - z0 * y, + cy = z0 * x - x0 * z, + cz = x0 * y - y0 * x, + m = sqrt(cx * cx + cy * cy + cz * cz), + w = asin(m), // line weight = angle + v = m && -w / m; // area weight multiplier + X2 += v * cx; + Y2 += v * cy; + Z2 += v * cz; + W1 += w; + X1 += w * (x0 + (x0 = x)); + Y1 += w * (y0 + (y0 = y)); + Z1 += w * (z0 + (z0 = z)); + centroidPointCartesian(x0, y0, z0); +} -var plasma = ramp(colors("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")); +var centroid = function(object) { + W0 = W1 = + X0 = Y0 = Z0 = + X1 = Y1 = Z1 = + X2 = Y2 = Z2 = 0; + geoStream(object, centroidStream); -function sequential(interpolator) { - var x0 = 0, - x1 = 1, - clamp = false; + var x = X2, + y = Y2, + z = Z2, + m = x * x + y * y + z * z; - function scale(x) { - var t = (x - x0) / (x1 - x0); - return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t); + // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid. + if (m < epsilon2$1) { + x = X1, y = Y1, z = Z1; + // If the feature has zero length, fall back to arithmetic mean of point vectors. + if (W1 < epsilon$2) x = X0, y = Y0, z = Z0; + m = x * x + y * y + z * z; + // If the feature still has an undefined ccentroid, then return. + if (m < epsilon2$1) return [NaN, NaN]; } - scale.domain = function(_) { - return arguments.length ? (x0 = +_[0], x1 = +_[1], scale) : [x0, x1]; - }; + return [atan2(y, x) * degrees$1, asin(z / sqrt(m)) * degrees$1]; +}; - scale.clamp = function(_) { - return arguments.length ? (clamp = !!_, scale) : clamp; +var constant$7 = function(x) { + return function() { + return x; }; +}; - scale.interpolator = function(_) { - return arguments.length ? (interpolator = _, scale) : interpolator; - }; +var compose = function(a, b) { - scale.copy = function() { - return sequential(interpolator).domain([x0, x1]).clamp(clamp); + function compose(x, y) { + return x = a(x, y), b(x[0], x[1]); + } + + if (a.invert && b.invert) compose.invert = function(x, y) { + return x = b.invert(x, y), x && a.invert(x[0], x[1]); }; - return linearish(scale); -} + return compose; +}; -var xhtml = "http://www.w3.org/1999/xhtml"; +function rotationIdentity(lambda, phi) { + return [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi]; +} -var namespaces = { - svg: "http://www.w3.org/2000/svg", - xhtml: xhtml, - xlink: "http://www.w3.org/1999/xlink", - xml: "http://www.w3.org/XML/1998/namespace", - xmlns: "http://www.w3.org/2000/xmlns/" -}; +rotationIdentity.invert = rotationIdentity; -var namespace = function(name) { - var prefix = name += "", i = prefix.indexOf(":"); - if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1); - return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name; -}; +function rotateRadians(deltaLambda, deltaPhi, deltaGamma) { + return (deltaLambda %= tau$3) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma)) + : rotationLambda(deltaLambda)) + : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma) + : rotationIdentity); +} -function creatorInherit(name) { - return function() { - var document = this.ownerDocument, - uri = this.namespaceURI; - return uri === xhtml && document.documentElement.namespaceURI === xhtml - ? document.createElement(name) - : document.createElementNS(uri, name); +function forwardRotationLambda(deltaLambda) { + return function(lambda, phi) { + return lambda += deltaLambda, [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi]; }; } -function creatorFixed(fullname) { - return function() { - return this.ownerDocument.createElementNS(fullname.space, fullname.local); - }; +function rotationLambda(deltaLambda) { + var rotation = forwardRotationLambda(deltaLambda); + rotation.invert = forwardRotationLambda(-deltaLambda); + return rotation; } -var creator = function(name) { - var fullname = namespace(name); - return (fullname.local - ? creatorFixed - : creatorInherit)(fullname); -}; +function rotationPhiGamma(deltaPhi, deltaGamma) { + var cosDeltaPhi = cos$1(deltaPhi), + sinDeltaPhi = sin$1(deltaPhi), + cosDeltaGamma = cos$1(deltaGamma), + sinDeltaGamma = sin$1(deltaGamma); -var nextId = 0; + function rotation(lambda, phi) { + var cosPhi = cos$1(phi), + x = cos$1(lambda) * cosPhi, + y = sin$1(lambda) * cosPhi, + z = sin$1(phi), + k = z * cosDeltaPhi + x * sinDeltaPhi; + return [ + atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi), + asin(k * cosDeltaGamma + y * sinDeltaGamma) + ]; + } + + rotation.invert = function(lambda, phi) { + var cosPhi = cos$1(phi), + x = cos$1(lambda) * cosPhi, + y = sin$1(lambda) * cosPhi, + z = sin$1(phi), + k = z * cosDeltaGamma - y * sinDeltaGamma; + return [ + atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi), + asin(k * cosDeltaPhi - x * sinDeltaPhi) + ]; + }; -function local() { - return new Local; + return rotation; } -function Local() { - this._ = "@" + (++nextId).toString(36); -} +var rotation = function(rotate) { + rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0); -Local.prototype = local.prototype = { - constructor: Local, - get: function(node) { - var id = this._; - while (!(id in node)) if (!(node = node.parentNode)) return; - return node[id]; - }, - set: function(node, value) { - return node[this._] = value; - }, - remove: function(node) { - return this._ in node && delete node[this._]; - }, - toString: function() { - return this._; + function forward(coordinates) { + coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians); + return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates; } -}; -var matcher = function(selector) { - return function() { - return this.matches(selector); + forward.invert = function(coordinates) { + coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians); + return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates; }; + + return forward; }; -if (typeof document !== "undefined") { - var element = document.documentElement; - if (!element.matches) { - var vendorMatches = element.webkitMatchesSelector - || element.msMatchesSelector - || element.mozMatchesSelector - || element.oMatchesSelector; - matcher = function(selector) { - return function() { - return vendorMatches.call(this, selector); - }; - }; +// Generates a circle centered at [0°, 0°], with a given radius and precision. +function circleStream(stream, radius, delta, direction, t0, t1) { + if (!delta) return; + var cosRadius = cos$1(radius), + sinRadius = sin$1(radius), + step = direction * delta; + if (t0 == null) { + t0 = radius + direction * tau$3; + t1 = radius - step / 2; + } else { + t0 = circleRadius(cosRadius, t0); + t1 = circleRadius(cosRadius, t1); + if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau$3; + } + for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) { + point = spherical([cosRadius, -sinRadius * cos$1(t), -sinRadius * sin$1(t)]); + stream.point(point[0], point[1]); } } -var matcher$1 = matcher; +// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0]. +function circleRadius(cosRadius, point) { + point = cartesian(point), point[0] -= cosRadius; + cartesianNormalizeInPlace(point); + var radius = acos(-point[1]); + return ((-point[2] < 0 ? -radius : radius) + tau$3 - epsilon$2) % tau$3; +} -var filterEvents = {}; +var circle = function() { + var center = constant$7([0, 0]), + radius = constant$7(90), + precision = constant$7(6), + ring, + rotate, + stream = {point: point}; -exports.event = null; + function point(x, y) { + ring.push(x = rotate(x, y)); + x[0] *= degrees$1, x[1] *= degrees$1; + } -if (typeof document !== "undefined") { - var element$1 = document.documentElement; - if (!("onmouseenter" in element$1)) { - filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"}; + function circle() { + var c = center.apply(this, arguments), + r = radius.apply(this, arguments) * radians, + p = precision.apply(this, arguments) * radians; + ring = []; + rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert; + circleStream(stream, r, p, 1); + c = {type: "Polygon", coordinates: [ring]}; + ring = rotate = null; + return c; } -} -function filterContextListener(listener, index, group) { - listener = contextListener(listener, index, group); - return function(event) { - var related = event.relatedTarget; - if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) { - listener.call(this, event); - } + circle.center = function(_) { + return arguments.length ? (center = typeof _ === "function" ? _ : constant$7([+_[0], +_[1]]), circle) : center; }; -} -function contextListener(listener, index, group) { - return function(event1) { - var event0 = exports.event; // Events can be reentrant (e.g., focus). - exports.event = event1; - try { - listener.call(this, this.__data__, index, group); - } finally { - exports.event = event0; - } + circle.radius = function(_) { + return arguments.length ? (radius = typeof _ === "function" ? _ : constant$7(+_), circle) : radius; }; -} - -function parseTypenames$1(typenames) { - return typenames.trim().split(/^|\s+/).map(function(t) { - var name = "", i = t.indexOf("."); - if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i); - return {type: t, name: name}; - }); -} -function onRemove(typename) { - return function() { - var on = this.__on; - if (!on) return; - for (var j = 0, i = -1, m = on.length, o; j < m; ++j) { - if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) { - this.removeEventListener(o.type, o.listener, o.capture); - } else { - on[++i] = o; - } - } - if (++i) on.length = i; - else delete this.__on; + circle.precision = function(_) { + return arguments.length ? (precision = typeof _ === "function" ? _ : constant$7(+_), circle) : precision; }; -} -function onAdd(typename, value, capture) { - var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener; - return function(d, i, group) { - var on = this.__on, o, listener = wrap(value, i, group); - if (on) for (var j = 0, m = on.length; j < m; ++j) { - if ((o = on[j]).type === typename.type && o.name === typename.name) { - this.removeEventListener(o.type, o.listener, o.capture); - this.addEventListener(o.type, o.listener = listener, o.capture = capture); - o.value = value; - return; - } + return circle; +}; + +var clipBuffer = function() { + var lines = [], + line; + return { + point: function(x, y) { + line.push([x, y]); + }, + lineStart: function() { + lines.push(line = []); + }, + lineEnd: noop$1, + rejoin: function() { + if (lines.length > 1) lines.push(lines.pop().concat(lines.shift())); + }, + result: function() { + var result = lines; + lines = []; + line = null; + return result; } - this.addEventListener(typename.type, listener, capture); - o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture}; - if (!on) this.__on = [o]; - else on.push(o); }; -} +}; -var selection_on = function(typename, value, capture) { - var typenames = parseTypenames$1(typename + ""), i, n = typenames.length, t; +var clipLine = function(a, b, x0, y0, x1, y1) { + var ax = a[0], + ay = a[1], + bx = b[0], + by = b[1], + t0 = 0, + t1 = 1, + dx = bx - ax, + dy = by - ay, + r; - if (arguments.length < 2) { - var on = this.node().__on; - if (on) for (var j = 0, m = on.length, o; j < m; ++j) { - for (i = 0, o = on[j]; i < n; ++i) { - if ((t = typenames[i]).type === o.type && t.name === o.name) { - return o.value; - } - } - } - return; + r = x0 - ax; + if (!dx && r > 0) return; + r /= dx; + if (dx < 0) { + if (r < t0) return; + if (r < t1) t1 = r; + } else if (dx > 0) { + if (r > t1) return; + if (r > t0) t0 = r; } - on = value ? onAdd : onRemove; - if (capture == null) capture = false; - for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture)); - return this; -}; - -function customEvent(event1, listener, that, args) { - var event0 = exports.event; - event1.sourceEvent = exports.event; - exports.event = event1; - try { - return listener.apply(that, args); - } finally { - exports.event = event0; + r = x1 - ax; + if (!dx && r < 0) return; + r /= dx; + if (dx < 0) { + if (r > t1) return; + if (r > t0) t0 = r; + } else if (dx > 0) { + if (r < t0) return; + if (r < t1) t1 = r; } -} - -var sourceEvent = function() { - var current = exports.event, source; - while (source = current.sourceEvent) current = source; - return current; -}; - -var point$5 = function(node, event) { - var svg = node.ownerSVGElement || node; - if (svg.createSVGPoint) { - var point = svg.createSVGPoint(); - point.x = event.clientX, point.y = event.clientY; - point = point.matrixTransform(node.getScreenCTM().inverse()); - return [point.x, point.y]; + r = y0 - ay; + if (!dy && r > 0) return; + r /= dy; + if (dy < 0) { + if (r < t0) return; + if (r < t1) t1 = r; + } else if (dy > 0) { + if (r > t1) return; + if (r > t0) t0 = r; } - var rect = node.getBoundingClientRect(); - return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop]; + r = y1 - ay; + if (!dy && r < 0) return; + r /= dy; + if (dy < 0) { + if (r > t1) return; + if (r > t0) t0 = r; + } else if (dy > 0) { + if (r < t0) return; + if (r < t1) t1 = r; + } + + if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy; + if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy; + return true; }; -var mouse = function(node) { - var event = sourceEvent(); - if (event.changedTouches) event = event.changedTouches[0]; - return point$5(node, event); +var pointEqual = function(a, b) { + return abs(a[0] - b[0]) < epsilon$2 && abs(a[1] - b[1]) < epsilon$2; }; -function none$2() {} +function Intersection(point, points, other, entry) { + this.x = point; + this.z = points; + this.o = other; // another intersection + this.e = entry; // is an entry? + this.v = false; // visited + this.n = this.p = null; // next & previous +} -var selector = function(selector) { - return selector == null ? none$2 : function() { - return this.querySelector(selector); - }; -}; +// A generalized polygon clipping algorithm: given a polygon that has been cut +// into its visible line segments, and rejoins the segments by interpolating +// along the clip edge. +var clipPolygon = function(segments, compareIntersection, startInside, interpolate, stream) { + var subject = [], + clip = [], + i, + n; -var selection_select = function(select) { - if (typeof select !== "function") select = selector(select); + segments.forEach(function(segment) { + if ((n = segment.length - 1) <= 0) return; + var n, p0 = segment[0], p1 = segment[n], x; - for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) { - for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) { - if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) { - if ("__data__" in node) subnode.__data__ = node.__data__; - subgroup[i] = subnode; - } + // If the first and last points of a segment are coincident, then treat as a + // closed ring. TODO if all rings are closed, then the winding order of the + // exterior ring should be checked. + if (pointEqual(p0, p1)) { + stream.lineStart(); + for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]); + stream.lineEnd(); + return; } - } - return new Selection(subgroups, this._parents); -}; + subject.push(x = new Intersection(p0, segment, null, true)); + clip.push(x.o = new Intersection(p0, null, x, false)); + subject.push(x = new Intersection(p1, segment, null, false)); + clip.push(x.o = new Intersection(p1, null, x, true)); + }); -function empty() { - return []; -} + if (!subject.length) return; -var selectorAll = function(selector) { - return selector == null ? empty : function() { - return this.querySelectorAll(selector); - }; -}; + clip.sort(compareIntersection); + link$1(subject); + link$1(clip); -var selection_selectAll = function(select) { - if (typeof select !== "function") select = selectorAll(select); + for (i = 0, n = clip.length; i < n; ++i) { + clip[i].e = startInside = !startInside; + } - for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) { - for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) { - if (node = group[i]) { - subgroups.push(select.call(node, node.__data__, i, group)); - parents.push(node); + var start = subject[0], + points, + point; + + while (1) { + // Find first unvisited intersection. + var current = start, + isSubject = true; + while (current.v) if ((current = current.n) === start) return; + points = current.z; + stream.lineStart(); + do { + current.v = current.o.v = true; + if (current.e) { + if (isSubject) { + for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]); + } else { + interpolate(current.x, current.n.x, 1, stream); + } + current = current.n; + } else { + if (isSubject) { + points = current.p.z; + for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]); + } else { + interpolate(current.x, current.p.x, -1, stream); + } + current = current.p; } - } + current = current.o; + points = current.z; + isSubject = !isSubject; + } while (!current.v); + stream.lineEnd(); } - - return new Selection(subgroups, parents); }; -var selection_filter = function(match) { - if (typeof match !== "function") match = matcher$1(match); +function link$1(array) { + if (!(n = array.length)) return; + var n, + i = 0, + a = array[0], + b; + while (++i < n) { + a.n = b = array[i]; + b.p = a; + a = b; + } + a.n = b = array[0]; + b.p = a; +} - for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) { - for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) { - if ((node = group[i]) && match.call(node, node.__data__, i, group)) { - subgroup.push(node); - } +var clipMax = 1e9; +var clipMin = -clipMax; + +// TODO Use d3-polygon’s polygonContains here for the ring check? +// TODO Eliminate duplicate buffering in clipBuffer and polygon.push? + +function clipExtent(x0, y0, x1, y1) { + + function visible(x, y) { + return x0 <= x && x <= x1 && y0 <= y && y <= y1; + } + + function interpolate(from, to, direction, stream) { + var a = 0, a1 = 0; + if (from == null + || (a = corner(from, direction)) !== (a1 = corner(to, direction)) + || comparePoint(from, to) < 0 ^ direction > 0) { + do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0); + while ((a = (a + direction + 4) % 4) !== a1); + } else { + stream.point(to[0], to[1]); } } - return new Selection(subgroups, this._parents); -}; + function corner(p, direction) { + return abs(p[0] - x0) < epsilon$2 ? direction > 0 ? 0 : 3 + : abs(p[0] - x1) < epsilon$2 ? direction > 0 ? 2 : 1 + : abs(p[1] - y0) < epsilon$2 ? direction > 0 ? 1 : 0 + : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon + } -var sparse = function(update) { - return new Array(update.length); -}; + function compareIntersection(a, b) { + return comparePoint(a.x, b.x); + } -var selection_enter = function() { - return new Selection(this._enter || this._groups.map(sparse), this._parents); -}; + function comparePoint(a, b) { + var ca = corner(a, 1), + cb = corner(b, 1); + return ca !== cb ? ca - cb + : ca === 0 ? b[1] - a[1] + : ca === 1 ? a[0] - b[0] + : ca === 2 ? a[1] - b[1] + : b[0] - a[0]; + } -function EnterNode(parent, datum) { - this.ownerDocument = parent.ownerDocument; - this.namespaceURI = parent.namespaceURI; - this._next = null; - this._parent = parent; - this.__data__ = datum; -} + return function(stream) { + var activeStream = stream, + bufferStream = clipBuffer(), + segments, + polygon, + ring, + x__, y__, v__, // first point + x_, y_, v_, // previous point + first, + clean; -EnterNode.prototype = { - constructor: EnterNode, - appendChild: function(child) { return this._parent.insertBefore(child, this._next); }, - insertBefore: function(child, next) { return this._parent.insertBefore(child, next); }, - querySelector: function(selector) { return this._parent.querySelector(selector); }, - querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); } -}; + var clipStream = { + point: point, + lineStart: lineStart, + lineEnd: lineEnd, + polygonStart: polygonStart, + polygonEnd: polygonEnd + }; -var constant$5 = function(x) { - return function() { - return x; - }; -}; + function point(x, y) { + if (visible(x, y)) activeStream.point(x, y); + } -var keyPrefix = "$"; // Protect against keys like “__proto__”. + function polygonInside() { + var winding = 0; -function bindIndex(parent, group, enter, update, exit, data) { - var i = 0, - node, - groupLength = group.length, - dataLength = data.length; + for (var i = 0, n = polygon.length; i < n; ++i) { + for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) { + a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1]; + if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; } + else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; } + } + } - // Put any non-null nodes that fit into update. - // Put any null nodes into enter. - // Put any remaining data into enter. - for (; i < dataLength; ++i) { - if (node = group[i]) { - node.__data__ = data[i]; - update[i] = node; - } else { - enter[i] = new EnterNode(parent, data[i]); + return winding; + } + + // Buffer geometry within a polygon and then clip it en masse. + function polygonStart() { + activeStream = bufferStream, segments = [], polygon = [], clean = true; } - } - // Put any non-null nodes that don’t fit into exit. - for (; i < groupLength; ++i) { - if (node = group[i]) { - exit[i] = node; + function polygonEnd() { + var startInside = polygonInside(), + cleanInside = clean && startInside, + visible = (segments = merge(segments)).length; + if (cleanInside || visible) { + stream.polygonStart(); + if (cleanInside) { + stream.lineStart(); + interpolate(null, null, 1, stream); + stream.lineEnd(); + } + if (visible) { + clipPolygon(segments, compareIntersection, startInside, interpolate, stream); + } + stream.polygonEnd(); + } + activeStream = stream, segments = polygon = ring = null; } - } -} -function bindKey(parent, group, enter, update, exit, data, key) { - var i, - node, - nodeByKeyValue = {}, - groupLength = group.length, - dataLength = data.length, - keyValues = new Array(groupLength), - keyValue; + function lineStart() { + clipStream.point = linePoint; + if (polygon) polygon.push(ring = []); + first = true; + v_ = false; + x_ = y_ = NaN; + } - // Compute the key for each node. - // If multiple nodes have the same key, the duplicates are added to exit. - for (i = 0; i < groupLength; ++i) { - if (node = group[i]) { - keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group); - if (keyValue in nodeByKeyValue) { - exit[i] = node; - } else { - nodeByKeyValue[keyValue] = node; + // TODO rather than special-case polygons, simply handle them separately. + // Ideally, coincident intersection points should be jittered to avoid + // clipping issues. + function lineEnd() { + if (segments) { + linePoint(x__, y__); + if (v__ && v_) bufferStream.rejoin(); + segments.push(bufferStream.result()); } + clipStream.point = point; + if (v_) activeStream.lineEnd(); } - } - // Compute the key for each datum. - // If there a node associated with this key, join and add it to update. - // If there is not (or the key is a duplicate), add it to enter. - for (i = 0; i < dataLength; ++i) { - keyValue = keyPrefix + key.call(parent, data[i], i, data); - if (node = nodeByKeyValue[keyValue]) { - update[i] = node; - node.__data__ = data[i]; - nodeByKeyValue[keyValue] = null; - } else { - enter[i] = new EnterNode(parent, data[i]); + function linePoint(x, y) { + var v = visible(x, y); + if (polygon) ring.push([x, y]); + if (first) { + x__ = x, y__ = y, v__ = v; + first = false; + if (v) { + activeStream.lineStart(); + activeStream.point(x, y); + } + } else { + if (v && v_) activeStream.point(x, y); + else { + var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))], + b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))]; + if (clipLine(a, b, x0, y0, x1, y1)) { + if (!v_) { + activeStream.lineStart(); + activeStream.point(a[0], a[1]); + } + activeStream.point(b[0], b[1]); + if (!v) activeStream.lineEnd(); + clean = false; + } else if (v) { + activeStream.lineStart(); + activeStream.point(x, y); + clean = false; + } + } + } + x_ = x, y_ = y, v_ = v; } - } - // Add any remaining nodes that were not bound to data to exit. - for (i = 0; i < groupLength; ++i) { - if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) { - exit[i] = node; - } - } + return clipStream; + }; } -var selection_data = function(value, key) { - if (!value) { - data = new Array(this.size()), j = -1; - this.each(function(d) { data[++j] = d; }); - return data; - } +var extent$1 = function() { + var x0 = 0, + y0 = 0, + x1 = 960, + y1 = 500, + cache, + cacheStream, + clip; - var bind = key ? bindKey : bindIndex, - parents = this._parents, - groups = this._groups; + return clip = { + stream: function(stream) { + return cache && cacheStream === stream ? cache : cache = clipExtent(x0, y0, x1, y1)(cacheStream = stream); + }, + extent: function(_) { + return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]]; + } + }; +}; - if (typeof value !== "function") value = constant$5(value); +var sum$1 = adder(); - for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) { - var parent = parents[j], - group = groups[j], - groupLength = group.length, - data = value.call(parent, parent && parent.__data__, j, parents), - dataLength = data.length, - enterGroup = enter[j] = new Array(dataLength), - updateGroup = update[j] = new Array(dataLength), - exitGroup = exit[j] = new Array(groupLength); +var polygonContains = function(polygon, point) { + var lambda = point[0], + phi = point[1], + normal = [sin$1(lambda), -cos$1(lambda), 0], + angle = 0, + winding = 0; - bind(parent, group, enterGroup, updateGroup, exitGroup, data, key); + sum$1.reset(); - // Now connect the enter nodes to their following update node, such that - // appendChild can insert the materialized enter node before this node, - // rather than at the end of the parent node. - for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) { - if (previous = enterGroup[i0]) { - if (i0 >= i1) i1 = i0 + 1; - while (!(next = updateGroup[i1]) && ++i1 < dataLength); - previous._next = next || null; + for (var i = 0, n = polygon.length; i < n; ++i) { + if (!(m = (ring = polygon[i]).length)) continue; + var ring, + m, + point0 = ring[m - 1], + lambda0 = point0[0], + phi0 = point0[1] / 2 + quarterPi, + sinPhi0 = sin$1(phi0), + cosPhi0 = cos$1(phi0); + + for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) { + var point1 = ring[j], + lambda1 = point1[0], + phi1 = point1[1] / 2 + quarterPi, + sinPhi1 = sin$1(phi1), + cosPhi1 = cos$1(phi1), + delta = lambda1 - lambda0, + sign$$1 = delta >= 0 ? 1 : -1, + absDelta = sign$$1 * delta, + antimeridian = absDelta > pi$3, + k = sinPhi0 * sinPhi1; + + sum$1.add(atan2(k * sign$$1 * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta))); + angle += antimeridian ? delta + sign$$1 * tau$3 : delta; + + // Are the longitudes either side of the point’s meridian (lambda), + // and are the latitudes smaller than the parallel (phi)? + if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) { + var arc = cartesianCross(cartesian(point0), cartesian(point1)); + cartesianNormalizeInPlace(arc); + var intersection = cartesianCross(normal, arc); + cartesianNormalizeInPlace(intersection); + var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]); + if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) { + winding += antimeridian ^ delta >= 0 ? 1 : -1; + } } } } - update = new Selection(update, parents); - update._enter = enter; - update._exit = exit; - return update; + // First, determine whether the South pole is inside or outside: + // + // It is inside if: + // * the polygon winds around it in a clockwise direction. + // * the polygon does not (cumulatively) wind around it, but has a negative + // (counter-clockwise) area. + // + // Second, count the (signed) number of times a segment crosses a lambda + // from the point to the South pole. If it is zero, then the point is the + // same side as the South pole. + + return (angle < -epsilon$2 || angle < epsilon$2 && sum$1 < -epsilon$2) ^ (winding & 1); }; -var selection_exit = function() { - return new Selection(this._exit || this._groups.map(sparse), this._parents); +var lengthSum = adder(); +var lambda0$2; +var sinPhi0$1; +var cosPhi0$1; + +var lengthStream = { + sphere: noop$1, + point: noop$1, + lineStart: lengthLineStart, + lineEnd: noop$1, + polygonStart: noop$1, + polygonEnd: noop$1 }; -var selection_merge = function(selection) { +function lengthLineStart() { + lengthStream.point = lengthPointFirst; + lengthStream.lineEnd = lengthLineEnd; +} - for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) { - for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) { - if (node = group0[i] || group1[i]) { - merge[i] = node; - } - } - } +function lengthLineEnd() { + lengthStream.point = lengthStream.lineEnd = noop$1; +} - for (; j < m0; ++j) { - merges[j] = groups0[j]; - } +function lengthPointFirst(lambda, phi) { + lambda *= radians, phi *= radians; + lambda0$2 = lambda, sinPhi0$1 = sin$1(phi), cosPhi0$1 = cos$1(phi); + lengthStream.point = lengthPoint; +} - return new Selection(merges, this._parents); +function lengthPoint(lambda, phi) { + lambda *= radians, phi *= radians; + var sinPhi = sin$1(phi), + cosPhi = cos$1(phi), + delta = abs(lambda - lambda0$2), + cosDelta = cos$1(delta), + sinDelta = sin$1(delta), + x = cosPhi * sinDelta, + y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta, + z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta; + lengthSum.add(atan2(sqrt(x * x + y * y), z)); + lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi; +} + +var length$1 = function(object) { + lengthSum.reset(); + geoStream(object, lengthStream); + return +lengthSum; }; -var selection_order = function() { +var coordinates = [null, null]; +var object$1 = {type: "LineString", coordinates: coordinates}; - for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) { - for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) { - if (node = group[i]) { - if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next); - next = node; - } - } +var distance = function(a, b) { + coordinates[0] = a; + coordinates[1] = b; + return length$1(object$1); +}; + +var containsObjectType = { + Feature: function(object, point) { + return containsGeometry(object.geometry, point); + }, + FeatureCollection: function(object, point) { + var features = object.features, i = -1, n = features.length; + while (++i < n) if (containsGeometry(features[i].geometry, point)) return true; + return false; } +}; - return this; +var containsGeometryType = { + Sphere: function() { + return true; + }, + Point: function(object, point) { + return containsPoint(object.coordinates, point); + }, + MultiPoint: function(object, point) { + var coordinates = object.coordinates, i = -1, n = coordinates.length; + while (++i < n) if (containsPoint(coordinates[i], point)) return true; + return false; + }, + LineString: function(object, point) { + return containsLine(object.coordinates, point); + }, + MultiLineString: function(object, point) { + var coordinates = object.coordinates, i = -1, n = coordinates.length; + while (++i < n) if (containsLine(coordinates[i], point)) return true; + return false; + }, + Polygon: function(object, point) { + return containsPolygon(object.coordinates, point); + }, + MultiPolygon: function(object, point) { + var coordinates = object.coordinates, i = -1, n = coordinates.length; + while (++i < n) if (containsPolygon(coordinates[i], point)) return true; + return false; + }, + GeometryCollection: function(object, point) { + var geometries = object.geometries, i = -1, n = geometries.length; + while (++i < n) if (containsGeometry(geometries[i], point)) return true; + return false; + } }; -var selection_sort = function(compare) { - if (!compare) compare = ascending$2; +function containsGeometry(geometry, point) { + return geometry && containsGeometryType.hasOwnProperty(geometry.type) + ? containsGeometryType[geometry.type](geometry, point) + : false; +} - function compareNode(a, b) { - return a && b ? compare(a.__data__, b.__data__) : !a - !b; - } +function containsPoint(coordinates, point) { + return distance(coordinates, point) === 0; +} - for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) { - for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) { - if (node = group[i]) { - sortgroup[i] = node; - } - } - sortgroup.sort(compareNode); - } +function containsLine(coordinates, point) { + var ab = distance(coordinates[0], coordinates[1]), + ao = distance(coordinates[0], point), + ob = distance(point, coordinates[1]); + return ao + ob <= ab + epsilon$2; +} - return new Selection(sortgroups, this._parents).order(); -}; +function containsPolygon(coordinates, point) { + return !!polygonContains(coordinates.map(ringRadians), pointRadians(point)); +} -function ascending$2(a, b) { - return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN; +function ringRadians(ring) { + return ring = ring.map(pointRadians), ring.pop(), ring; } -var selection_call = function() { - var callback = arguments[0]; - arguments[0] = this; - callback.apply(null, arguments); - return this; -}; +function pointRadians(point) { + return [point[0] * radians, point[1] * radians]; +} -var selection_nodes = function() { - var nodes = new Array(this.size()), i = -1; - this.each(function() { nodes[++i] = this; }); - return nodes; +var contains = function(object, point) { + return (object && containsObjectType.hasOwnProperty(object.type) + ? containsObjectType[object.type] + : containsGeometry)(object, point); }; -var selection_node = function() { +function graticuleX(y0, y1, dy) { + var y = sequence(y0, y1 - epsilon$2, dy).concat(y1); + return function(x) { return y.map(function(y) { return [x, y]; }); }; +} - for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) { - for (var group = groups[j], i = 0, n = group.length; i < n; ++i) { - var node = group[i]; - if (node) return node; - } +function graticuleY(x0, x1, dx) { + var x = sequence(x0, x1 - epsilon$2, dx).concat(x1); + return function(y) { return x.map(function(x) { return [x, y]; }); }; +} + +function graticule() { + var x1, x0, X1, X0, + y1, y0, Y1, Y0, + dx = 10, dy = dx, DX = 90, DY = 360, + x, y, X, Y, + precision = 2.5; + + function graticule() { + return {type: "MultiLineString", coordinates: lines()}; } - return null; -}; + function lines() { + return sequence(ceil(X0 / DX) * DX, X1, DX).map(X) + .concat(sequence(ceil(Y0 / DY) * DY, Y1, DY).map(Y)) + .concat(sequence(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs(x % DX) > epsilon$2; }).map(x)) + .concat(sequence(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs(y % DY) > epsilon$2; }).map(y)); + } -var selection_size = function() { - var size = 0; - this.each(function() { ++size; }); - return size; -}; + graticule.lines = function() { + return lines().map(function(coordinates) { return {type: "LineString", coordinates: coordinates}; }); + }; -var selection_empty = function() { - return !this.node(); -}; + graticule.outline = function() { + return { + type: "Polygon", + coordinates: [ + X(X0).concat( + Y(Y1).slice(1), + X(X1).reverse().slice(1), + Y(Y0).reverse().slice(1)) + ] + }; + }; -var selection_each = function(callback) { + graticule.extent = function(_) { + if (!arguments.length) return graticule.extentMinor(); + return graticule.extentMajor(_).extentMinor(_); + }; - for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) { - for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) { - if (node = group[i]) callback.call(node, node.__data__, i, group); - } - } + graticule.extentMajor = function(_) { + if (!arguments.length) return [[X0, Y0], [X1, Y1]]; + X0 = +_[0][0], X1 = +_[1][0]; + Y0 = +_[0][1], Y1 = +_[1][1]; + if (X0 > X1) _ = X0, X0 = X1, X1 = _; + if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _; + return graticule.precision(precision); + }; - return this; -}; + graticule.extentMinor = function(_) { + if (!arguments.length) return [[x0, y0], [x1, y1]]; + x0 = +_[0][0], x1 = +_[1][0]; + y0 = +_[0][1], y1 = +_[1][1]; + if (x0 > x1) _ = x0, x0 = x1, x1 = _; + if (y0 > y1) _ = y0, y0 = y1, y1 = _; + return graticule.precision(precision); + }; -function attrRemove(name) { - return function() { - this.removeAttribute(name); + graticule.step = function(_) { + if (!arguments.length) return graticule.stepMinor(); + return graticule.stepMajor(_).stepMinor(_); }; -} -function attrRemoveNS(fullname) { - return function() { - this.removeAttributeNS(fullname.space, fullname.local); + graticule.stepMajor = function(_) { + if (!arguments.length) return [DX, DY]; + DX = +_[0], DY = +_[1]; + return graticule; }; -} -function attrConstant(name, value) { - return function() { - this.setAttribute(name, value); + graticule.stepMinor = function(_) { + if (!arguments.length) return [dx, dy]; + dx = +_[0], dy = +_[1]; + return graticule; }; -} -function attrConstantNS(fullname, value) { - return function() { - this.setAttributeNS(fullname.space, fullname.local, value); + graticule.precision = function(_) { + if (!arguments.length) return precision; + precision = +_; + x = graticuleX(y0, y1, 90); + y = graticuleY(x0, x1, precision); + X = graticuleX(Y0, Y1, 90); + Y = graticuleY(X0, X1, precision); + return graticule; }; + + return graticule + .extentMajor([[-180, -90 + epsilon$2], [180, 90 - epsilon$2]]) + .extentMinor([[-180, -80 - epsilon$2], [180, 80 + epsilon$2]]); } -function attrFunction(name, value) { - return function() { - var v = value.apply(this, arguments); - if (v == null) this.removeAttribute(name); - else this.setAttribute(name, v); - }; +function graticule10() { + return graticule()(); } -function attrFunctionNS(fullname, value) { - return function() { - var v = value.apply(this, arguments); - if (v == null) this.removeAttributeNS(fullname.space, fullname.local); - else this.setAttributeNS(fullname.space, fullname.local, v); +var interpolate$1 = function(a, b) { + var x0 = a[0] * radians, + y0 = a[1] * radians, + x1 = b[0] * radians, + y1 = b[1] * radians, + cy0 = cos$1(y0), + sy0 = sin$1(y0), + cy1 = cos$1(y1), + sy1 = sin$1(y1), + kx0 = cy0 * cos$1(x0), + ky0 = cy0 * sin$1(x0), + kx1 = cy1 * cos$1(x1), + ky1 = cy1 * sin$1(x1), + d = 2 * asin(sqrt(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))), + k = sin$1(d); + + var interpolate = d ? function(t) { + var B = sin$1(t *= d) / k, + A = sin$1(d - t) / k, + x = A * kx0 + B * kx1, + y = A * ky0 + B * ky1, + z = A * sy0 + B * sy1; + return [ + atan2(y, x) * degrees$1, + atan2(z, sqrt(x * x + y * y)) * degrees$1 + ]; + } : function() { + return [x0 * degrees$1, y0 * degrees$1]; }; -} -var selection_attr = function(name, value) { - var fullname = namespace(name); + interpolate.distance = d; - if (arguments.length < 2) { - var node = this.node(); - return fullname.local - ? node.getAttributeNS(fullname.space, fullname.local) - : node.getAttribute(fullname); - } + return interpolate; +}; - return this.each((value == null - ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function" - ? (fullname.local ? attrFunctionNS : attrFunction) - : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value)); +var identity$4 = function(x) { + return x; }; -var window = function(node) { - return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node - || (node.document && node) // node is a Window - || node.defaultView; // node is a Document +var areaSum$1 = adder(); +var areaRingSum$1 = adder(); +var x00; +var y00; +var x0$1; +var y0$1; + +var areaStream$1 = { + point: noop$1, + lineStart: noop$1, + lineEnd: noop$1, + polygonStart: function() { + areaStream$1.lineStart = areaRingStart$1; + areaStream$1.lineEnd = areaRingEnd$1; + }, + polygonEnd: function() { + areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$1; + areaSum$1.add(abs(areaRingSum$1)); + areaRingSum$1.reset(); + }, + result: function() { + var area = areaSum$1 / 2; + areaSum$1.reset(); + return area; + } }; -function styleRemove(name) { - return function() { - this.style.removeProperty(name); - }; -} - -function styleConstant(name, value, priority) { - return function() { - this.style.setProperty(name, value, priority); - }; +function areaRingStart$1() { + areaStream$1.point = areaPointFirst$1; } -function styleFunction(name, value, priority) { - return function() { - var v = value.apply(this, arguments); - if (v == null) this.style.removeProperty(name); - else this.style.setProperty(name, v, priority); - }; +function areaPointFirst$1(x, y) { + areaStream$1.point = areaPoint$1; + x00 = x0$1 = x, y00 = y0$1 = y; } -var selection_style = function(name, value, priority) { - var node; - return arguments.length > 1 - ? this.each((value == null - ? styleRemove : typeof value === "function" - ? styleFunction - : styleConstant)(name, value, priority == null ? "" : priority)) - : window(node = this.node()) - .getComputedStyle(node, null) - .getPropertyValue(name); -}; - -function propertyRemove(name) { - return function() { - delete this[name]; - }; +function areaPoint$1(x, y) { + areaRingSum$1.add(y0$1 * x - x0$1 * y); + x0$1 = x, y0$1 = y; } -function propertyConstant(name, value) { - return function() { - this[name] = value; - }; +function areaRingEnd$1() { + areaPoint$1(x00, y00); } -function propertyFunction(name, value) { - return function() { - var v = value.apply(this, arguments); - if (v == null) delete this[name]; - else this[name] = v; - }; -} +var x0$2 = Infinity; +var y0$2 = x0$2; +var x1 = -x0$2; +var y1 = x1; -var selection_property = function(name, value) { - return arguments.length > 1 - ? this.each((value == null - ? propertyRemove : typeof value === "function" - ? propertyFunction - : propertyConstant)(name, value)) - : this.node()[name]; +var boundsStream$1 = { + point: boundsPoint$1, + lineStart: noop$1, + lineEnd: noop$1, + polygonStart: noop$1, + polygonEnd: noop$1, + result: function() { + var bounds = [[x0$2, y0$2], [x1, y1]]; + x1 = y1 = -(y0$2 = x0$2 = Infinity); + return bounds; + } }; -function classArray(string) { - return string.trim().split(/^|\s+/); +function boundsPoint$1(x, y) { + if (x < x0$2) x0$2 = x; + if (x > x1) x1 = x; + if (y < y0$2) y0$2 = y; + if (y > y1) y1 = y; } -function classList(node) { - return node.classList || new ClassList(node); -} +// TODO Enforce positive area for exterior, negative area for interior? -function ClassList(node) { - this._node = node; - this._names = classArray(node.getAttribute("class") || ""); -} +var X0$1 = 0; +var Y0$1 = 0; +var Z0$1 = 0; +var X1$1 = 0; +var Y1$1 = 0; +var Z1$1 = 0; +var X2$1 = 0; +var Y2$1 = 0; +var Z2$1 = 0; +var x00$1; +var y00$1; +var x0$3; +var y0$3; -ClassList.prototype = { - add: function(name) { - var i = this._names.indexOf(name); - if (i < 0) { - this._names.push(name); - this._node.setAttribute("class", this._names.join(" ")); - } +var centroidStream$1 = { + point: centroidPoint$1, + lineStart: centroidLineStart$1, + lineEnd: centroidLineEnd$1, + polygonStart: function() { + centroidStream$1.lineStart = centroidRingStart$1; + centroidStream$1.lineEnd = centroidRingEnd$1; }, - remove: function(name) { - var i = this._names.indexOf(name); - if (i >= 0) { - this._names.splice(i, 1); - this._node.setAttribute("class", this._names.join(" ")); - } + polygonEnd: function() { + centroidStream$1.point = centroidPoint$1; + centroidStream$1.lineStart = centroidLineStart$1; + centroidStream$1.lineEnd = centroidLineEnd$1; }, - contains: function(name) { - return this._names.indexOf(name) >= 0; + result: function() { + var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1] + : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1] + : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1] + : [NaN, NaN]; + X0$1 = Y0$1 = Z0$1 = + X1$1 = Y1$1 = Z1$1 = + X2$1 = Y2$1 = Z2$1 = 0; + return centroid; } }; -function classedAdd(node, names) { - var list = classList(node), i = -1, n = names.length; - while (++i < n) list.add(names[i]); +function centroidPoint$1(x, y) { + X0$1 += x; + Y0$1 += y; + ++Z0$1; } -function classedRemove(node, names) { - var list = classList(node), i = -1, n = names.length; - while (++i < n) list.remove(names[i]); +function centroidLineStart$1() { + centroidStream$1.point = centroidPointFirstLine; } -function classedTrue(names) { - return function() { - classedAdd(this, names); - }; +function centroidPointFirstLine(x, y) { + centroidStream$1.point = centroidPointLine; + centroidPoint$1(x0$3 = x, y0$3 = y); } -function classedFalse(names) { - return function() { - classedRemove(this, names); - }; +function centroidPointLine(x, y) { + var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy); + X1$1 += z * (x0$3 + x) / 2; + Y1$1 += z * (y0$3 + y) / 2; + Z1$1 += z; + centroidPoint$1(x0$3 = x, y0$3 = y); } -function classedFunction(names, value) { - return function() { - (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names); - }; +function centroidLineEnd$1() { + centroidStream$1.point = centroidPoint$1; } -var selection_classed = function(name, value) { - var names = classArray(name + ""); - - if (arguments.length < 2) { - var list = classList(this.node()), i = -1, n = names.length; - while (++i < n) if (!list.contains(names[i])) return false; - return true; - } +function centroidRingStart$1() { + centroidStream$1.point = centroidPointFirstRing; +} - return this.each((typeof value === "function" - ? classedFunction : value - ? classedTrue - : classedFalse)(names, value)); -}; +function centroidRingEnd$1() { + centroidPointRing(x00$1, y00$1); +} -function textRemove() { - this.textContent = ""; +function centroidPointFirstRing(x, y) { + centroidStream$1.point = centroidPointRing; + centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y); } -function textConstant(value) { - return function() { - this.textContent = value; - }; +function centroidPointRing(x, y) { + var dx = x - x0$3, + dy = y - y0$3, + z = sqrt(dx * dx + dy * dy); + + X1$1 += z * (x0$3 + x) / 2; + Y1$1 += z * (y0$3 + y) / 2; + Z1$1 += z; + + z = y0$3 * x - x0$3 * y; + X2$1 += z * (x0$3 + x); + Y2$1 += z * (y0$3 + y); + Z2$1 += z * 3; + centroidPoint$1(x0$3 = x, y0$3 = y); } -function textFunction(value) { - return function() { - var v = value.apply(this, arguments); - this.textContent = v == null ? "" : v; - }; +function PathContext(context) { + this._context = context; } -var selection_text = function(value) { - return arguments.length - ? this.each(value == null - ? textRemove : (typeof value === "function" - ? textFunction - : textConstant)(value)) - : this.node().textContent; +PathContext.prototype = { + _radius: 4.5, + pointRadius: function(_) { + return this._radius = _, this; + }, + polygonStart: function() { + this._line = 0; + }, + polygonEnd: function() { + this._line = NaN; + }, + lineStart: function() { + this._point = 0; + }, + lineEnd: function() { + if (this._line === 0) this._context.closePath(); + this._point = NaN; + }, + point: function(x, y) { + switch (this._point) { + case 0: { + this._context.moveTo(x, y); + this._point = 1; + break; + } + case 1: { + this._context.lineTo(x, y); + break; + } + default: { + this._context.moveTo(x + this._radius, y); + this._context.arc(x, y, this._radius, 0, tau$3); + break; + } + } + }, + result: noop$1 +}; + +var lengthSum$1 = adder(); +var lengthRing; +var x00$2; +var y00$2; +var x0$4; +var y0$4; + +var lengthStream$1 = { + point: noop$1, + lineStart: function() { + lengthStream$1.point = lengthPointFirst$1; + }, + lineEnd: function() { + if (lengthRing) lengthPoint$1(x00$2, y00$2); + lengthStream$1.point = noop$1; + }, + polygonStart: function() { + lengthRing = true; + }, + polygonEnd: function() { + lengthRing = null; + }, + result: function() { + var length = +lengthSum$1; + lengthSum$1.reset(); + return length; + } }; -function htmlRemove() { - this.innerHTML = ""; +function lengthPointFirst$1(x, y) { + lengthStream$1.point = lengthPoint$1; + x00$2 = x0$4 = x, y00$2 = y0$4 = y; } -function htmlConstant(value) { - return function() { - this.innerHTML = value; - }; +function lengthPoint$1(x, y) { + x0$4 -= x, y0$4 -= y; + lengthSum$1.add(sqrt(x0$4 * x0$4 + y0$4 * y0$4)); + x0$4 = x, y0$4 = y; } -function htmlFunction(value) { - return function() { - var v = value.apply(this, arguments); - this.innerHTML = v == null ? "" : v; - }; +function PathString() { + this._string = []; } -var selection_html = function(value) { - return arguments.length - ? this.each(value == null - ? htmlRemove : (typeof value === "function" - ? htmlFunction - : htmlConstant)(value)) - : this.node().innerHTML; +PathString.prototype = { + _circle: circle$1(4.5), + pointRadius: function(_) { + return this._circle = circle$1(_), this; + }, + polygonStart: function() { + this._line = 0; + }, + polygonEnd: function() { + this._line = NaN; + }, + lineStart: function() { + this._point = 0; + }, + lineEnd: function() { + if (this._line === 0) this._string.push("Z"); + this._point = NaN; + }, + point: function(x, y) { + switch (this._point) { + case 0: { + this._string.push("M", x, ",", y); + this._point = 1; + break; + } + case 1: { + this._string.push("L", x, ",", y); + break; + } + default: { + this._string.push("M", x, ",", y, this._circle); + break; + } + } + }, + result: function() { + if (this._string.length) { + var result = this._string.join(""); + this._string = []; + return result; + } + } }; -function raise$1() { - if (this.nextSibling) this.parentNode.appendChild(this); +function circle$1(radius) { + return "m0," + radius + + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius + + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius + + "z"; } -var selection_raise = function() { - return this.each(raise$1); -}; +var index$1 = function(projection, context) { + var pointRadius = 4.5, + projectionStream, + contextStream; -function lower() { - if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild); -} + function path(object) { + if (object) { + if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments)); + geoStream(object, projectionStream(contextStream)); + } + return contextStream.result(); + } -var selection_lower = function() { - return this.each(lower); -}; + path.area = function(object) { + geoStream(object, projectionStream(areaStream$1)); + return areaStream$1.result(); + }; -var selection_append = function(name) { - var create = typeof name === "function" ? name : creator(name); - return this.select(function() { - return this.appendChild(create.apply(this, arguments)); - }); -}; + path.measure = function(object) { + geoStream(object, projectionStream(lengthStream$1)); + return lengthStream$1.result(); + }; -function constantNull() { - return null; -} + path.bounds = function(object) { + geoStream(object, projectionStream(boundsStream$1)); + return boundsStream$1.result(); + }; -var selection_insert = function(name, before) { - var create = typeof name === "function" ? name : creator(name), - select = before == null ? constantNull : typeof before === "function" ? before : selector(before); - return this.select(function() { - return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null); - }); -}; + path.centroid = function(object) { + geoStream(object, projectionStream(centroidStream$1)); + return centroidStream$1.result(); + }; -function remove() { - var parent = this.parentNode; - if (parent) parent.removeChild(this); -} + path.projection = function(_) { + return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection; + }; -var selection_remove = function() { - return this.each(remove); -}; + path.context = function(_) { + if (!arguments.length) return context; + contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _); + if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius); + return path; + }; -var selection_datum = function(value) { - return arguments.length - ? this.property("__data__", value) - : this.node().__data__; + path.pointRadius = function(_) { + if (!arguments.length) return pointRadius; + pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_); + return path; + }; + + return path.projection(projection).context(context); }; -function dispatchEvent(node, type, params) { - var window$$1 = window(node), - event = window$$1.CustomEvent; +var clip = function(pointVisible, clipLine, interpolate, start) { + return function(rotate, sink) { + var line = clipLine(sink), + rotatedStart = rotate.invert(start[0], start[1]), + ringBuffer = clipBuffer(), + ringSink = clipLine(ringBuffer), + polygonStarted = false, + polygon, + segments, + ring; - if (event) { - event = new event(type, params); - } else { - event = window$$1.document.createEvent("Event"); - if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail; - else event.initEvent(type, false, false); - } + var clip = { + point: point, + lineStart: lineStart, + lineEnd: lineEnd, + polygonStart: function() { + clip.point = pointRing; + clip.lineStart = ringStart; + clip.lineEnd = ringEnd; + segments = []; + polygon = []; + }, + polygonEnd: function() { + clip.point = point; + clip.lineStart = lineStart; + clip.lineEnd = lineEnd; + segments = merge(segments); + var startInside = polygonContains(polygon, rotatedStart); + if (segments.length) { + if (!polygonStarted) sink.polygonStart(), polygonStarted = true; + clipPolygon(segments, compareIntersection, startInside, interpolate, sink); + } else if (startInside) { + if (!polygonStarted) sink.polygonStart(), polygonStarted = true; + sink.lineStart(); + interpolate(null, null, 1, sink); + sink.lineEnd(); + } + if (polygonStarted) sink.polygonEnd(), polygonStarted = false; + segments = polygon = null; + }, + sphere: function() { + sink.polygonStart(); + sink.lineStart(); + interpolate(null, null, 1, sink); + sink.lineEnd(); + sink.polygonEnd(); + } + }; - node.dispatchEvent(event); -} + function point(lambda, phi) { + var point = rotate(lambda, phi); + if (pointVisible(lambda = point[0], phi = point[1])) sink.point(lambda, phi); + } -function dispatchConstant(type, params) { - return function() { - return dispatchEvent(this, type, params); - }; -} + function pointLine(lambda, phi) { + var point = rotate(lambda, phi); + line.point(point[0], point[1]); + } -function dispatchFunction(type, params) { - return function() { - return dispatchEvent(this, type, params.apply(this, arguments)); - }; -} + function lineStart() { + clip.point = pointLine; + line.lineStart(); + } -var selection_dispatch = function(type, params) { - return this.each((typeof params === "function" - ? dispatchFunction - : dispatchConstant)(type, params)); -}; + function lineEnd() { + clip.point = point; + line.lineEnd(); + } -var root = [null]; + function pointRing(lambda, phi) { + ring.push([lambda, phi]); + var point = rotate(lambda, phi); + ringSink.point(point[0], point[1]); + } + + function ringStart() { + ringSink.lineStart(); + ring = []; + } -function Selection(groups, parents) { - this._groups = groups; - this._parents = parents; -} + function ringEnd() { + pointRing(ring[0][0], ring[0][1]); + ringSink.lineEnd(); -function selection() { - return new Selection([[document.documentElement]], root); -} + var clean = ringSink.clean(), + ringSegments = ringBuffer.result(), + i, n = ringSegments.length, m, + segment, + point; -Selection.prototype = selection.prototype = { - constructor: Selection, - select: selection_select, - selectAll: selection_selectAll, - filter: selection_filter, - data: selection_data, - enter: selection_enter, - exit: selection_exit, - merge: selection_merge, - order: selection_order, - sort: selection_sort, - call: selection_call, - nodes: selection_nodes, - node: selection_node, - size: selection_size, - empty: selection_empty, - each: selection_each, - attr: selection_attr, - style: selection_style, - property: selection_property, - classed: selection_classed, - text: selection_text, - html: selection_html, - raise: selection_raise, - lower: selection_lower, - append: selection_append, - insert: selection_insert, - remove: selection_remove, - datum: selection_datum, - on: selection_on, - dispatch: selection_dispatch -}; + ring.pop(); + polygon.push(ring); + ring = null; -var select = function(selector) { - return typeof selector === "string" - ? new Selection([[document.querySelector(selector)]], [document.documentElement]) - : new Selection([[selector]], root); -}; + if (!n) return; -var selectAll = function(selector) { - return typeof selector === "string" - ? new Selection([document.querySelectorAll(selector)], [document.documentElement]) - : new Selection([selector == null ? [] : selector], root); -}; + // No intersections. + if (clean & 1) { + segment = ringSegments[0]; + if ((m = segment.length - 1) > 0) { + if (!polygonStarted) sink.polygonStart(), polygonStarted = true; + sink.lineStart(); + for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]); + sink.lineEnd(); + } + return; + } -var touch = function(node, touches, identifier) { - if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches; + // Rejoin connected segments. + // TODO reuse ringBuffer.rejoin()? + if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift())); - for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) { - if ((touch = touches[i]).identifier === identifier) { - return point$5(node, touch); + segments.push(ringSegments.filter(validSegment)); } - } - return null; + return clip; + }; }; -var touches = function(node, touches) { - if (touches == null) touches = sourceEvent().touches; - - for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) { - points[i] = point$5(node, touches[i]); - } - - return points; -}; +function validSegment(segment) { + return segment.length > 1; +} -var emptyOn = dispatch("start", "end", "interrupt"); -var emptyTween = []; +// Intersections are sorted along the clip edge. For both antimeridian cutting +// and circle clipping, the same comparison is used. +function compareIntersection(a, b) { + return ((a = a.x)[0] < 0 ? a[1] - halfPi$2 - epsilon$2 : halfPi$2 - a[1]) + - ((b = b.x)[0] < 0 ? b[1] - halfPi$2 - epsilon$2 : halfPi$2 - b[1]); +} -var CREATED = 0; -var SCHEDULED = 1; -var STARTING = 2; -var STARTED = 3; -var RUNNING = 4; -var ENDING = 5; -var ENDED = 6; +var clipAntimeridian = clip( + function() { return true; }, + clipAntimeridianLine, + clipAntimeridianInterpolate, + [-pi$3, -halfPi$2] +); -var schedule = function(node, name, id, index, group, timing) { - var schedules = node.__transition; - if (!schedules) node.__transition = {}; - else if (id in schedules) return; - create(node, id, { - name: name, - index: index, // For context during callback. - group: group, // For context during callback. - on: emptyOn, - tween: emptyTween, - time: timing.time, - delay: timing.delay, - duration: timing.duration, - ease: timing.ease, - timer: null, - state: CREATED - }); -}; +// Takes a line and cuts into visible segments. Return values: 0 - there were +// intersections or the line was empty; 1 - no intersections; 2 - there were +// intersections, and the first and last segments should be rejoined. +function clipAntimeridianLine(stream) { + var lambda0 = NaN, + phi0 = NaN, + sign0 = NaN, + clean; // no intersections -function init(node, id) { - var schedule = node.__transition; - if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error("too late"); - return schedule; + return { + lineStart: function() { + stream.lineStart(); + clean = 1; + }, + point: function(lambda1, phi1) { + var sign1 = lambda1 > 0 ? pi$3 : -pi$3, + delta = abs(lambda1 - lambda0); + if (abs(delta - pi$3) < epsilon$2) { // line crosses a pole + stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi$2 : -halfPi$2); + stream.point(sign0, phi0); + stream.lineEnd(); + stream.lineStart(); + stream.point(sign1, phi0); + stream.point(lambda1, phi0); + clean = 0; + } else if (sign0 !== sign1 && delta >= pi$3) { // line crosses antimeridian + if (abs(lambda0 - sign0) < epsilon$2) lambda0 -= sign0 * epsilon$2; // handle degeneracies + if (abs(lambda1 - sign1) < epsilon$2) lambda1 -= sign1 * epsilon$2; + phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1); + stream.point(sign0, phi0); + stream.lineEnd(); + stream.lineStart(); + stream.point(sign1, phi0); + clean = 0; + } + stream.point(lambda0 = lambda1, phi0 = phi1); + sign0 = sign1; + }, + lineEnd: function() { + stream.lineEnd(); + lambda0 = phi0 = NaN; + }, + clean: function() { + return 2 - clean; // if intersections, rejoin first and last segments + } + }; } -function set$3(node, id) { - var schedule = node.__transition; - if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error("too late"); - return schedule; +function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) { + var cosPhi0, + cosPhi1, + sinLambda0Lambda1 = sin$1(lambda0 - lambda1); + return abs(sinLambda0Lambda1) > epsilon$2 + ? atan((sin$1(phi0) * (cosPhi1 = cos$1(phi1)) * sin$1(lambda1) + - sin$1(phi1) * (cosPhi0 = cos$1(phi0)) * sin$1(lambda0)) + / (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) + : (phi0 + phi1) / 2; } -function get$1(node, id) { - var schedule = node.__transition; - if (!schedule || !(schedule = schedule[id])) throw new Error("too late"); - return schedule; +function clipAntimeridianInterpolate(from, to, direction, stream) { + var phi; + if (from == null) { + phi = direction * halfPi$2; + stream.point(-pi$3, phi); + stream.point(0, phi); + stream.point(pi$3, phi); + stream.point(pi$3, 0); + stream.point(pi$3, -phi); + stream.point(0, -phi); + stream.point(-pi$3, -phi); + stream.point(-pi$3, 0); + stream.point(-pi$3, phi); + } else if (abs(from[0] - to[0]) > epsilon$2) { + var lambda = from[0] < to[0] ? pi$3 : -pi$3; + phi = direction * lambda / 2; + stream.point(-lambda, phi); + stream.point(0, phi); + stream.point(lambda, phi); + } else { + stream.point(to[0], to[1]); + } } -function create(node, id, self) { - var schedules = node.__transition, - tween; +var clipCircle = function(radius, delta) { + var cr = cos$1(radius), + smallRadius = cr > 0, + notHemisphere = abs(cr) > epsilon$2; // TODO optimise for this common case + + function interpolate(from, to, direction, stream) { + circleStream(stream, radius, delta, direction, from, to); + } + + function visible(lambda, phi) { + return cos$1(lambda) * cos$1(phi) > cr; + } + + // Takes a line and cuts into visible segments. Return values used for polygon + // clipping: 0 - there were intersections or the line was empty; 1 - no + // intersections 2 - there were intersections, and the first and last segments + // should be rejoined. + function clipLine(stream) { + var point0, // previous point + c0, // code for previous point + v0, // visibility of previous point + v00, // visibility of first point + clean; // no intersections + return { + lineStart: function() { + v00 = v0 = false; + clean = 1; + }, + point: function(lambda, phi) { + var point1 = [lambda, phi], + point2, + v = visible(lambda, phi), + c = smallRadius + ? v ? 0 : code(lambda, phi) + : v ? code(lambda + (lambda < 0 ? pi$3 : -pi$3), phi) : 0; + if (!point0 && (v00 = v0 = v)) stream.lineStart(); + // Handle degeneracies. + // TODO ignore if not clipping polygons. + if (v !== v0) { + point2 = intersect(point0, point1); + if (pointEqual(point0, point2) || pointEqual(point1, point2)) { + point1[0] += epsilon$2; + point1[1] += epsilon$2; + v = visible(point1[0], point1[1]); + } + } + if (v !== v0) { + clean = 0; + if (v) { + // outside going in + stream.lineStart(); + point2 = intersect(point1, point0); + stream.point(point2[0], point2[1]); + } else { + // inside going out + point2 = intersect(point0, point1); + stream.point(point2[0], point2[1]); + stream.lineEnd(); + } + point0 = point2; + } else if (notHemisphere && point0 && smallRadius ^ v) { + var t; + // If the codes for two points are different, or are both zero, + // and there this segment intersects with the small circle. + if (!(c & c0) && (t = intersect(point1, point0, true))) { + clean = 0; + if (smallRadius) { + stream.lineStart(); + stream.point(t[0][0], t[0][1]); + stream.point(t[1][0], t[1][1]); + stream.lineEnd(); + } else { + stream.point(t[1][0], t[1][1]); + stream.lineEnd(); + stream.lineStart(); + stream.point(t[0][0], t[0][1]); + } + } + } + if (v && (!point0 || !pointEqual(point0, point1))) { + stream.point(point1[0], point1[1]); + } + point0 = point1, v0 = v, c0 = c; + }, + lineEnd: function() { + if (v0) stream.lineEnd(); + point0 = null; + }, + // Rejoin first and last segments if there were intersections and the first + // and last points were visible. + clean: function() { + return clean | ((v00 && v0) << 1); + } + }; + } + + // Intersects the great circle between a and b with the clip circle. + function intersect(a, b, two) { + var pa = cartesian(a), + pb = cartesian(b); - // Initialize the self timer when the transition is created. - // Note the actual delay is not known until the first callback! - schedules[id] = self; - self.timer = timer(schedule, 0, self.time); + // We have two planes, n1.p = d1 and n2.p = d2. + // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2). + var n1 = [1, 0, 0], // normal + n2 = cartesianCross(pa, pb), + n2n2 = cartesianDot(n2, n2), + n1n2 = n2[0], // cartesianDot(n1, n2), + determinant = n2n2 - n1n2 * n1n2; - function schedule(elapsed) { - self.state = SCHEDULED; - self.timer.restart(start, self.delay, self.time); + // Two polar points. + if (!determinant) return !two && a; - // If the elapsed delay is less than our first sleep, start immediately. - if (self.delay <= elapsed) start(elapsed - self.delay); - } + var c1 = cr * n2n2 / determinant, + c2 = -cr * n1n2 / determinant, + n1xn2 = cartesianCross(n1, n2), + A = cartesianScale(n1, c1), + B = cartesianScale(n2, c2); + cartesianAddInPlace(A, B); - function start(elapsed) { - var i, j, n, o; + // Solve |p(t)|^2 = 1. + var u = n1xn2, + w = cartesianDot(A, u), + uu = cartesianDot(u, u), + t2 = w * w - uu * (cartesianDot(A, A) - 1); - // If the state is not SCHEDULED, then we previously errored on start. - if (self.state !== SCHEDULED) return stop(); + if (t2 < 0) return; - for (i in schedules) { - o = schedules[i]; - if (o.name !== self.name) continue; + var t = sqrt(t2), + q = cartesianScale(u, (-w - t) / uu); + cartesianAddInPlace(q, A); + q = spherical(q); - // While this element already has a starting transition during this frame, - // defer starting an interrupting transition until that transition has a - // chance to tick (and possibly end); see d3/d3-transition#54! - if (o.state === STARTED) return timeout$1(start); + if (!two) return q; - // Interrupt the active transition, if any. - // Dispatch the interrupt event. - if (o.state === RUNNING) { - o.state = ENDED; - o.timer.stop(); - o.on.call("interrupt", node, node.__data__, o.index, o.group); - delete schedules[i]; - } + // Two intersection points. + var lambda0 = a[0], + lambda1 = b[0], + phi0 = a[1], + phi1 = b[1], + z; - // Cancel any pre-empted transitions. No interrupt event is dispatched - // because the cancelled transitions never started. Note that this also - // removes this transition from the pending list! - else if (+i < id) { - o.state = ENDED; - o.timer.stop(); - delete schedules[i]; - } - } + if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z; - // Defer the first tick to end of the current frame; see d3/d3#1576. - // Note the transition may be canceled after start and before the first tick! - // Note this must be scheduled before the start event; see d3/d3-transition#16! - // Assuming this is successful, subsequent callbacks go straight to tick. - timeout$1(function() { - if (self.state === STARTED) { - self.state = RUNNING; - self.timer.restart(tick, self.delay, self.time); - tick(elapsed); - } - }); + var delta = lambda1 - lambda0, + polar = abs(delta - pi$3) < epsilon$2, + meridian = polar || delta < epsilon$2; - // Dispatch the start event. - // Note this must be done before the tween are initialized. - self.state = STARTING; - self.on.call("start", node, node.__data__, self.index, self.group); - if (self.state !== STARTING) return; // interrupted - self.state = STARTED; + if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z; - // Initialize the tween, deleting null tween. - tween = new Array(n = self.tween.length); - for (i = 0, j = -1; i < n; ++i) { - if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) { - tween[++j] = o; - } + // Check that the first point is between a and b. + if (meridian + ? polar + ? phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon$2 ? phi0 : phi1) + : phi0 <= q[1] && q[1] <= phi1 + : delta > pi$3 ^ (lambda0 <= q[0] && q[0] <= lambda1)) { + var q1 = cartesianScale(u, (-w + t) / uu); + cartesianAddInPlace(q1, A); + return [q, spherical(q1)]; } - tween.length = j + 1; } - function tick(elapsed) { - var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1), - i = -1, - n = tween.length; + // Generates a 4-bit vector representing the location of a point relative to + // the small circle's bounding box. + function code(lambda, phi) { + var r = smallRadius ? radius : pi$3 - radius, + code = 0; + if (lambda < -r) code |= 1; // left + else if (lambda > r) code |= 2; // right + if (phi < -r) code |= 4; // below + else if (phi > r) code |= 8; // above + return code; + } - while (++i < n) { - tween[i].call(null, t); - } + return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$3, radius - pi$3]); +}; - // Dispatch the end event. - if (self.state === ENDING) { - self.on.call("end", node, node.__data__, self.index, self.group); - stop(); - } - } +var transform = function(methods) { + return { + stream: transformer(methods) + }; +}; - function stop() { - self.state = ENDED; - self.timer.stop(); - delete schedules[id]; - for (var i in schedules) return; // eslint-disable-line no-unused-vars - delete node.__transition; - } +function transformer(methods) { + return function(stream) { + var s = new TransformStream; + for (var key in methods) s[key] = methods[key]; + s.stream = stream; + return s; + }; } -var interrupt = function(node, name) { - var schedules = node.__transition, - schedule, - active, - empty = true, - i; - - if (!schedules) return; +function TransformStream() {} - name = name == null ? null : name + ""; +TransformStream.prototype = { + constructor: TransformStream, + point: function(x, y) { this.stream.point(x, y); }, + sphere: function() { this.stream.sphere(); }, + lineStart: function() { this.stream.lineStart(); }, + lineEnd: function() { this.stream.lineEnd(); }, + polygonStart: function() { this.stream.polygonStart(); }, + polygonEnd: function() { this.stream.polygonEnd(); } +}; - for (i in schedules) { - if ((schedule = schedules[i]).name !== name) { empty = false; continue; } - active = schedule.state > STARTING && schedule.state < ENDING; - schedule.state = ENDED; - schedule.timer.stop(); - if (active) schedule.on.call("interrupt", node, node.__data__, schedule.index, schedule.group); - delete schedules[i]; - } +function fitExtent(projection, extent, object) { + var w = extent[1][0] - extent[0][0], + h = extent[1][1] - extent[0][1], + clip = projection.clipExtent && projection.clipExtent(); - if (empty) delete node.__transition; -}; + projection + .scale(150) + .translate([0, 0]); -var selection_interrupt = function(name) { - return this.each(function() { - interrupt(this, name); - }); -}; + if (clip != null) projection.clipExtent(null); -function tweenRemove(id, name) { - var tween0, tween1; - return function() { - var schedule = set$3(this, id), - tween = schedule.tween; + geoStream(object, projection.stream(boundsStream$1)); - // If this node shared tween with the previous node, - // just assign the updated shared tween and we’re done! - // Otherwise, copy-on-write. - if (tween !== tween0) { - tween1 = tween0 = tween; - for (var i = 0, n = tween1.length; i < n; ++i) { - if (tween1[i].name === name) { - tween1 = tween1.slice(); - tween1.splice(i, 1); - break; - } - } - } + var b = boundsStream$1.result(), + k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])), + x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2, + y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2; - schedule.tween = tween1; - }; + if (clip != null) projection.clipExtent(clip); + + return projection + .scale(k * 150) + .translate([x, y]); } -function tweenFunction(id, name, value) { - var tween0, tween1; - if (typeof value !== "function") throw new Error; - return function() { - var schedule = set$3(this, id), - tween = schedule.tween; +function fitSize(projection, size, object) { + return fitExtent(projection, [[0, 0], size], object); +} - // If this node shared tween with the previous node, - // just assign the updated shared tween and we’re done! - // Otherwise, copy-on-write. - if (tween !== tween0) { - tween1 = (tween0 = tween).slice(); - for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) { - if (tween1[i].name === name) { - tween1[i] = t; - break; - } - } - if (i === n) tween1.push(t); - } +var maxDepth = 16; +var cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance) - schedule.tween = tween1; - }; -} +var resample = function(project, delta2) { + return +delta2 ? resample$1(project, delta2) : resampleNone(project); +}; -var transition_tween = function(name, value) { - var id = this._id; +function resampleNone(project) { + return transformer({ + point: function(x, y) { + x = project(x, y); + this.stream.point(x[0], x[1]); + } + }); +} - name += ""; +function resample$1(project, delta2) { - if (arguments.length < 2) { - var tween = get$1(this.node(), id).tween; - for (var i = 0, n = tween.length, t; i < n; ++i) { - if ((t = tween[i]).name === name) { - return t.value; + function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) { + var dx = x1 - x0, + dy = y1 - y0, + d2 = dx * dx + dy * dy; + if (d2 > 4 * delta2 && depth--) { + var a = a0 + a1, + b = b0 + b1, + c = c0 + c1, + m = sqrt(a * a + b * b + c * c), + phi2 = asin(c /= m), + lambda2 = abs(abs(c) - 1) < epsilon$2 || abs(lambda0 - lambda1) < epsilon$2 ? (lambda0 + lambda1) / 2 : atan2(b, a), + p = project(lambda2, phi2), + x2 = p[0], + y2 = p[1], + dx2 = x2 - x0, + dy2 = y2 - y0, + dz = dy * dx2 - dx * dy2; + if (dz * dz / d2 > delta2 // perpendicular projected distance + || abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end + || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance + resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream); + stream.point(x2, y2); + resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream); } } - return null; } + return function(stream) { + var lambda00, x00, y00, a00, b00, c00, // first point + lambda0, x0, y0, a0, b0, c0; // previous point - return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value)); -}; - -function tweenValue(transition, name, value) { - var id = transition._id; - - transition.each(function() { - var schedule = set$3(this, id); - (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments); - }); + var resampleStream = { + point: point, + lineStart: lineStart, + lineEnd: lineEnd, + polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; }, + polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; } + }; - return function(node) { - return get$1(node, id).value[name]; - }; -} + function point(x, y) { + x = project(x, y); + stream.point(x[0], x[1]); + } -var interpolate$1 = function(a, b) { - var c; - return (typeof b === "number" ? interpolateNumber - : b instanceof color ? interpolateRgb - : (c = color(b)) ? (b = c, interpolateRgb) - : interpolateString)(a, b); -}; + function lineStart() { + x0 = NaN; + resampleStream.point = linePoint; + stream.lineStart(); + } -function attrRemove$1(name) { - return function() { - this.removeAttribute(name); - }; -} + function linePoint(lambda, phi) { + var c = cartesian([lambda, phi]), p = project(lambda, phi); + resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream); + stream.point(x0, y0); + } -function attrRemoveNS$1(fullname) { - return function() { - this.removeAttributeNS(fullname.space, fullname.local); - }; -} + function lineEnd() { + resampleStream.point = point; + stream.lineEnd(); + } -function attrConstant$1(name, interpolate$$1, value1) { - var value00, - interpolate0; - return function() { - var value0 = this.getAttribute(name); - return value0 === value1 ? null - : value0 === value00 ? interpolate0 - : interpolate0 = interpolate$$1(value00 = value0, value1); - }; -} + function ringStart() { + lineStart(); + resampleStream.point = ringPoint; + resampleStream.lineEnd = ringEnd; + } -function attrConstantNS$1(fullname, interpolate$$1, value1) { - var value00, - interpolate0; - return function() { - var value0 = this.getAttributeNS(fullname.space, fullname.local); - return value0 === value1 ? null - : value0 === value00 ? interpolate0 - : interpolate0 = interpolate$$1(value00 = value0, value1); - }; -} + function ringPoint(lambda, phi) { + linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0; + resampleStream.point = linePoint; + } -function attrFunction$1(name, interpolate$$1, value) { - var value00, - value10, - interpolate0; - return function() { - var value0, value1 = value(this); - if (value1 == null) return void this.removeAttribute(name); - value0 = this.getAttribute(name); - return value0 === value1 ? null - : value0 === value00 && value1 === value10 ? interpolate0 - : interpolate0 = interpolate$$1(value00 = value0, value10 = value1); - }; -} + function ringEnd() { + resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream); + resampleStream.lineEnd = lineEnd; + lineEnd(); + } -function attrFunctionNS$1(fullname, interpolate$$1, value) { - var value00, - value10, - interpolate0; - return function() { - var value0, value1 = value(this); - if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local); - value0 = this.getAttributeNS(fullname.space, fullname.local); - return value0 === value1 ? null - : value0 === value00 && value1 === value10 ? interpolate0 - : interpolate0 = interpolate$$1(value00 = value0, value10 = value1); + return resampleStream; }; } -var transition_attr = function(name, value) { - var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate$1; - return this.attrTween(name, typeof value === "function" - ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value)) - : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname) - : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value)); -}; - -function attrTweenNS(fullname, value) { - function tween() { - var node = this, i = value.apply(node, arguments); - return i && function(t) { - node.setAttributeNS(fullname.space, fullname.local, i(t)); - }; +var transformRadians = transformer({ + point: function(x, y) { + this.stream.point(x * radians, y * radians); } - tween._value = value; - return tween; -} +}); -function attrTween(name, value) { - function tween() { - var node = this, i = value.apply(node, arguments); - return i && function(t) { - node.setAttribute(name, i(t)); - }; - } - tween._value = value; - return tween; +function projection(project) { + return projectionMutator(function() { return project; })(); } -var transition_attrTween = function(name, value) { - var key = "attr." + name; - if (arguments.length < 2) return (key = this.tween(key)) && key._value; - if (value == null) return this.tween(key, null); - if (typeof value !== "function") throw new Error; - var fullname = namespace(name); - return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value)); -}; - -function delayFunction(id, value) { - return function() { - init(this, id).delay = +value.apply(this, arguments); - }; -} +function projectionMutator(projectAt) { + var project, + k = 150, // scale + x = 480, y = 250, // translate + dx, dy, lambda = 0, phi = 0, // center + deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, projectRotate, // rotate + theta = null, preclip = clipAntimeridian, // clip angle + x0 = null, y0, x1, y1, postclip = identity$4, // clip extent + delta2 = 0.5, projectResample = resample(projectTransform, delta2), // precision + cache, + cacheStream; -function delayConstant(id, value) { - return value = +value, function() { - init(this, id).delay = value; - }; -} + function projection(point) { + point = projectRotate(point[0] * radians, point[1] * radians); + return [point[0] * k + dx, dy - point[1] * k]; + } -var transition_delay = function(value) { - var id = this._id; + function invert(point) { + point = projectRotate.invert((point[0] - dx) / k, (dy - point[1]) / k); + return point && [point[0] * degrees$1, point[1] * degrees$1]; + } - return arguments.length - ? this.each((typeof value === "function" - ? delayFunction - : delayConstant)(id, value)) - : get$1(this.node(), id).delay; -}; + function projectTransform(x, y) { + return x = project(x, y), [x[0] * k + dx, dy - x[1] * k]; + } -function durationFunction(id, value) { - return function() { - set$3(this, id).duration = +value.apply(this, arguments); + projection.stream = function(stream) { + return cache && cacheStream === stream ? cache : cache = transformRadians(preclip(rotate, projectResample(postclip(cacheStream = stream)))); }; -} -function durationConstant(id, value) { - return value = +value, function() { - set$3(this, id).duration = value; + projection.clipAngle = function(_) { + return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians, 6 * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1; }; -} - -var transition_duration = function(value) { - var id = this._id; - return arguments.length - ? this.each((typeof value === "function" - ? durationFunction - : durationConstant)(id, value)) - : get$1(this.node(), id).duration; -}; + projection.clipExtent = function(_) { + return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]]; + }; -function easeConstant(id, value) { - if (typeof value !== "function") throw new Error; - return function() { - set$3(this, id).ease = value; + projection.scale = function(_) { + return arguments.length ? (k = +_, recenter()) : k; }; -} -var transition_ease = function(value) { - var id = this._id; + projection.translate = function(_) { + return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y]; + }; - return arguments.length - ? this.each(easeConstant(id, value)) - : get$1(this.node(), id).ease; -}; + projection.center = function(_) { + return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1]; + }; -var transition_filter = function(match) { - if (typeof match !== "function") match = matcher$1(match); + projection.rotate = function(_) { + return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1]; + }; - for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) { - for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) { - if ((node = group[i]) && match.call(node, node.__data__, i, group)) { - subgroup.push(node); - } - } - } + projection.precision = function(_) { + return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2); + }; - return new Transition(subgroups, this._parents, this._name, this._id); -}; + projection.fitExtent = function(extent, object) { + return fitExtent(projection, extent, object); + }; -var transition_merge = function(transition) { - if (transition._id !== this._id) throw new Error; + projection.fitSize = function(size, object) { + return fitSize(projection, size, object); + }; - for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) { - for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) { - if (node = group0[i] || group1[i]) { - merge[i] = node; - } - } + function recenter() { + projectRotate = compose(rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma), project); + var center = project(lambda, phi); + dx = x - center[0] * k; + dy = y + center[1] * k; + return reset(); } - for (; j < m0; ++j) { - merges[j] = groups0[j]; + function reset() { + cache = cacheStream = null; + return projection; } - return new Transition(merges, this._parents, this._name, this._id); -}; - -function start$1(name) { - return (name + "").trim().split(/^|\s+/).every(function(t) { - var i = t.indexOf("."); - if (i >= 0) t = t.slice(0, i); - return !t || t === "start"; - }); -} - -function onFunction(id, name, listener) { - var on0, on1, sit = start$1(name) ? init : set$3; return function() { - var schedule = sit(this, id), - on = schedule.on; + project = projectAt.apply(this, arguments); + projection.invert = project.invert && invert; + return recenter(); + }; +} - // If this node shared a dispatch with the previous node, - // just assign the updated shared dispatch and we’re done! - // Otherwise, copy-on-write. - if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener); +function conicProjection(projectAt) { + var phi0 = 0, + phi1 = pi$3 / 3, + m = projectionMutator(projectAt), + p = m(phi0, phi1); - schedule.on = on1; + p.parallels = function(_) { + return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees$1, phi1 * degrees$1]; }; + + return p; } -var transition_on = function(name, listener) { - var id = this._id; +function cylindricalEqualAreaRaw(phi0) { + var cosPhi0 = cos$1(phi0); - return arguments.length < 2 - ? get$1(this.node(), id).on.on(name) - : this.each(onFunction(id, name, listener)); -}; + function forward(lambda, phi) { + return [lambda * cosPhi0, sin$1(phi) / cosPhi0]; + } -function removeFunction(id) { - return function() { - var parent = this.parentNode; - for (var i in this.__transition) if (+i !== id) return; - if (parent) parent.removeChild(this); + forward.invert = function(x, y) { + return [x / cosPhi0, asin(y * cosPhi0)]; }; + + return forward; } -var transition_remove = function() { - return this.on("end.remove", removeFunction(this._id)); -}; +function conicEqualAreaRaw(y0, y1) { + var sy0 = sin$1(y0), n = (sy0 + sin$1(y1)) / 2; -var transition_select = function(select$$1) { - var name = this._name, - id = this._id; + // Are the parallels symmetrical around the Equator? + if (abs(n) < epsilon$2) return cylindricalEqualAreaRaw(y0); - if (typeof select$$1 !== "function") select$$1 = selector(select$$1); + var c = 1 + sy0 * (2 * n - sy0), r0 = sqrt(c) / n; - for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) { - for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) { - if ((node = group[i]) && (subnode = select$$1.call(node, node.__data__, i, group))) { - if ("__data__" in node) subnode.__data__ = node.__data__; - subgroup[i] = subnode; - schedule(subgroup[i], name, id, i, subgroup, get$1(node, id)); - } - } + function project(x, y) { + var r = sqrt(c - 2 * n * sin$1(y)) / n; + return [r * sin$1(x *= n), r0 - r * cos$1(x)]; } - return new Transition(subgroups, this._parents, name, id); -}; - -var transition_selectAll = function(select$$1) { - var name = this._name, - id = this._id; - - if (typeof select$$1 !== "function") select$$1 = selectorAll(select$$1); + project.invert = function(x, y) { + var r0y = r0 - y; + return [atan2(x, abs(r0y)) / n * sign(r0y), asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))]; + }; - for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) { - for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) { - if (node = group[i]) { - for (var children = select$$1.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) { - if (child = children[k]) { - schedule(child, name, id, k, children, inherit); - } - } - subgroups.push(children); - parents.push(node); - } - } - } + return project; +} - return new Transition(subgroups, parents, name, id); +var conicEqualArea = function() { + return conicProjection(conicEqualAreaRaw) + .scale(155.424) + .center([0, 33.6442]); }; -var Selection$1 = selection.prototype.constructor; - -var transition_selection = function() { - return new Selection$1(this._groups, this._parents); +var albers = function() { + return conicEqualArea() + .parallels([29.5, 45.5]) + .scale(1070) + .translate([480, 250]) + .rotate([96, 0]) + .center([-0.6, 38.7]); }; -function styleRemove$1(name, interpolate$$1) { - var value00, - value10, - interpolate0; - return function() { - var style = window(this).getComputedStyle(this, null), - value0 = style.getPropertyValue(name), - value1 = (this.style.removeProperty(name), style.getPropertyValue(name)); - return value0 === value1 ? null - : value0 === value00 && value1 === value10 ? interpolate0 - : interpolate0 = interpolate$$1(value00 = value0, value10 = value1); +// The projections must have mutually exclusive clip regions on the sphere, +// as this will avoid emitting interleaving lines and polygons. +function multiplex(streams) { + var n = streams.length; + return { + point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); }, + sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); }, + lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); }, + lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); }, + polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); }, + polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); } }; } -function styleRemoveEnd(name) { - return function() { - this.style.removeProperty(name); +// A composite projection for the United States, configured by default for +// 960×500. The projection also works quite well at 960×600 if you change the +// scale to 1285 and adjust the translate accordingly. The set of standard +// parallels for each region comes from USGS, which is published here: +// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers +var albersUsa = function() { + var cache, + cacheStream, + lower48 = albers(), lower48Point, + alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338 + hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007 + point, pointStream = {point: function(x, y) { point = [x, y]; }}; + + function albersUsa(coordinates) { + var x = coordinates[0], y = coordinates[1]; + return point = null, + (lower48Point.point(x, y), point) + || (alaskaPoint.point(x, y), point) + || (hawaiiPoint.point(x, y), point); + } + + albersUsa.invert = function(coordinates) { + var k = lower48.scale(), + t = lower48.translate(), + x = (coordinates[0] - t[0]) / k, + y = (coordinates[1] - t[1]) / k; + return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska + : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii + : lower48).invert(coordinates); + }; + + albersUsa.stream = function(stream) { + return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]); }; -} -function styleConstant$1(name, interpolate$$1, value1) { - var value00, - interpolate0; - return function() { - var value0 = window(this).getComputedStyle(this, null).getPropertyValue(name); - return value0 === value1 ? null - : value0 === value00 ? interpolate0 - : interpolate0 = interpolate$$1(value00 = value0, value1); + albersUsa.precision = function(_) { + if (!arguments.length) return lower48.precision(); + lower48.precision(_), alaska.precision(_), hawaii.precision(_); + return reset(); }; -} -function styleFunction$1(name, interpolate$$1, value) { - var value00, - value10, - interpolate0; - return function() { - var style = window(this).getComputedStyle(this, null), - value0 = style.getPropertyValue(name), - value1 = value(this); - if (value1 == null) value1 = (this.style.removeProperty(name), style.getPropertyValue(name)); - return value0 === value1 ? null - : value0 === value00 && value1 === value10 ? interpolate0 - : interpolate0 = interpolate$$1(value00 = value0, value10 = value1); + albersUsa.scale = function(_) { + if (!arguments.length) return lower48.scale(); + lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_); + return albersUsa.translate(lower48.translate()); }; -} -var transition_style = function(name, value, priority) { - var i = (name += "") === "transform" ? interpolateTransformCss : interpolate$1; - return value == null ? this - .styleTween(name, styleRemove$1(name, i)) - .on("end.style." + name, styleRemoveEnd(name)) - : this.styleTween(name, typeof value === "function" - ? styleFunction$1(name, i, tweenValue(this, "style." + name, value)) - : styleConstant$1(name, i, value), priority); -}; + albersUsa.translate = function(_) { + if (!arguments.length) return lower48.translate(); + var k = lower48.scale(), x = +_[0], y = +_[1]; -function styleTween(name, value, priority) { - function tween() { - var node = this, i = value.apply(node, arguments); - return i && function(t) { - node.style.setProperty(name, i(t), priority); - }; - } - tween._value = value; - return tween; -} + lower48Point = lower48 + .translate(_) + .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]]) + .stream(pointStream); -var transition_styleTween = function(name, value, priority) { - var key = "style." + (name += ""); - if (arguments.length < 2) return (key = this.tween(key)) && key._value; - if (value == null) return this.tween(key, null); - if (typeof value !== "function") throw new Error; - return this.tween(key, styleTween(name, value, priority == null ? "" : priority)); -}; + alaskaPoint = alaska + .translate([x - 0.307 * k, y + 0.201 * k]) + .clipExtent([[x - 0.425 * k + epsilon$2, y + 0.120 * k + epsilon$2], [x - 0.214 * k - epsilon$2, y + 0.234 * k - epsilon$2]]) + .stream(pointStream); -function textConstant$1(value) { - return function() { - this.textContent = value; - }; -} + hawaiiPoint = hawaii + .translate([x - 0.205 * k, y + 0.212 * k]) + .clipExtent([[x - 0.214 * k + epsilon$2, y + 0.166 * k + epsilon$2], [x - 0.115 * k - epsilon$2, y + 0.234 * k - epsilon$2]]) + .stream(pointStream); -function textFunction$1(value) { - return function() { - var value1 = value(this); - this.textContent = value1 == null ? "" : value1; + return reset(); }; -} -var transition_text = function(value) { - return this.tween("text", typeof value === "function" - ? textFunction$1(tweenValue(this, "text", value)) - : textConstant$1(value == null ? "" : value + "")); -}; + albersUsa.fitExtent = function(extent, object) { + return fitExtent(albersUsa, extent, object); + }; -var transition_transition = function() { - var name = this._name, - id0 = this._id, - id1 = newId(); + albersUsa.fitSize = function(size, object) { + return fitSize(albersUsa, size, object); + }; - for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) { - for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) { - if (node = group[i]) { - var inherit = get$1(node, id0); - schedule(node, name, id1, i, group, { - time: inherit.time + inherit.delay + inherit.duration, - delay: 0, - duration: inherit.duration, - ease: inherit.ease - }); - } - } + function reset() { + cache = cacheStream = null; + return albersUsa; } - return new Transition(groups, this._parents, name, id1); + return albersUsa.scale(1070); }; -var id = 0; - -function Transition(groups, parents, name, id) { - this._groups = groups; - this._parents = parents; - this._name = name; - this._id = id; -} - -function transition(name) { - return selection().transition(name); +function azimuthalRaw(scale) { + return function(x, y) { + var cx = cos$1(x), + cy = cos$1(y), + k = scale(cx * cy); + return [ + k * cy * sin$1(x), + k * sin$1(y) + ]; + } } -function newId() { - return ++id; +function azimuthalInvert(angle) { + return function(x, y) { + var z = sqrt(x * x + y * y), + c = angle(z), + sc = sin$1(c), + cc = cos$1(c); + return [ + atan2(x * sc, z * cc), + asin(z && y * sc / z) + ]; + } } -var selection_prototype = selection.prototype; +var azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) { + return sqrt(2 / (1 + cxcy)); +}); -Transition.prototype = transition.prototype = { - constructor: Transition, - select: transition_select, - selectAll: transition_selectAll, - filter: transition_filter, - merge: transition_merge, - selection: transition_selection, - transition: transition_transition, - call: selection_prototype.call, - nodes: selection_prototype.nodes, - node: selection_prototype.node, - size: selection_prototype.size, - empty: selection_prototype.empty, - each: selection_prototype.each, - on: transition_on, - attr: transition_attr, - attrTween: transition_attrTween, - style: transition_style, - styleTween: transition_styleTween, - text: transition_text, - remove: transition_remove, - tween: transition_tween, - delay: transition_delay, - duration: transition_duration, - ease: transition_ease -}; +azimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) { + return 2 * asin(z / 2); +}); -var defaultTiming = { - time: null, // Set on use. - delay: 0, - duration: 250, - ease: cubicInOut +var azimuthalEqualArea = function() { + return projection(azimuthalEqualAreaRaw) + .scale(124.75) + .clipAngle(180 - 1e-3); }; -function inherit(node, id) { - var timing; - while (!(timing = node.__transition) || !(timing = timing[id])) { - if (!(node = node.parentNode)) { - return defaultTiming.time = now(), defaultTiming; - } - } - return timing; -} +var azimuthalEquidistantRaw = azimuthalRaw(function(c) { + return (c = acos(c)) && c / sin$1(c); +}); -var selection_transition = function(name) { - var id, - timing; +azimuthalEquidistantRaw.invert = azimuthalInvert(function(z) { + return z; +}); - if (name instanceof Transition) { - id = name._id, name = name._name; - } else { - id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + ""; - } +var azimuthalEquidistant = function() { + return projection(azimuthalEquidistantRaw) + .scale(79.4188) + .clipAngle(180 - 1e-3); +}; - for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) { - for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) { - if (node = group[i]) { - schedule(node, name, id, i, group, timing || inherit(node, id)); - } - } - } +function mercatorRaw(lambda, phi) { + return [lambda, log(tan((halfPi$2 + phi) / 2))]; +} - return new Transition(groups, this._parents, name, id); +mercatorRaw.invert = function(x, y) { + return [x, 2 * atan(exp(y)) - halfPi$2]; }; -selection.prototype.interrupt = selection_interrupt; -selection.prototype.transition = selection_transition; - -var root$1 = [null]; +var mercator = function() { + return mercatorProjection(mercatorRaw) + .scale(961 / tau$3); +}; -var active = function(node, name) { - var schedules = node.__transition, - schedule, - i; +function mercatorProjection(project) { + var m = projection(project), + center = m.center, + scale = m.scale, + translate = m.translate, + clipExtent = m.clipExtent, + x0 = null, y0, x1, y1; // clip extent - if (schedules) { - name = name == null ? null : name + ""; - for (i in schedules) { - if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) { - return new Transition([[node]], root$1, name, +i); - } - } - } + m.scale = function(_) { + return arguments.length ? (scale(_), reclip()) : scale(); + }; - return null; -}; + m.translate = function(_) { + return arguments.length ? (translate(_), reclip()) : translate(); + }; -var slice$4 = Array.prototype.slice; + m.center = function(_) { + return arguments.length ? (center(_), reclip()) : center(); + }; -var identity$5 = function(x) { - return x; -}; + m.clipExtent = function(_) { + return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]]; + }; -var top = 1; -var right = 2; -var bottom = 3; -var left = 4; -var epsilon$2 = 1e-6; + function reclip() { + var k = pi$3 * scale(), + t = m(rotation(m.rotate()).invert([0, 0])); + return clipExtent(x0 == null + ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw + ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]] + : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]); + } -function translateX(scale0, scale1, d) { - var x = scale0(d); - return "translate(" + (isFinite(x) ? x : scale1(d)) + ",0)"; + return reclip(); } -function translateY(scale0, scale1, d) { - var y = scale0(d); - return "translate(0," + (isFinite(y) ? y : scale1(d)) + ")"; +function tany(y) { + return tan((halfPi$2 + y) / 2); } -function center(scale) { - var offset = scale.bandwidth() / 2; - if (scale.round()) offset = Math.round(offset); - return function(d) { - return scale(d) + offset; +function conicConformalRaw(y0, y1) { + var cy0 = cos$1(y0), + n = y0 === y1 ? sin$1(y0) : log(cy0 / cos$1(y1)) / log(tany(y1) / tany(y0)), + f = cy0 * pow(tany(y0), n) / n; + + if (!n) return mercatorRaw; + + function project(x, y) { + if (f > 0) { if (y < -halfPi$2 + epsilon$2) y = -halfPi$2 + epsilon$2; } + else { if (y > halfPi$2 - epsilon$2) y = halfPi$2 - epsilon$2; } + var r = f / pow(tany(y), n); + return [r * sin$1(n * x), f - r * cos$1(n * x)]; + } + + project.invert = function(x, y) { + var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy); + return [atan2(x, abs(fy)) / n * sign(fy), 2 * atan(pow(f / r, 1 / n)) - halfPi$2]; }; -} -function entering() { - return !this.__axis; + return project; } -function axis(orient, scale) { - var tickArguments = [], - tickValues = null, - tickFormat = null, - tickSizeInner = 6, - tickSizeOuter = 6, - tickPadding = 3; +var conicConformal = function() { + return conicProjection(conicConformalRaw) + .scale(109.5) + .parallels([30, 30]); +}; - function axis(context) { - var values = tickValues == null ? (scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain()) : tickValues, - format = tickFormat == null ? (scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity$5) : tickFormat, - spacing = Math.max(tickSizeInner, 0) + tickPadding, - transform = orient === top || orient === bottom ? translateX : translateY, - range = scale.range(), - range0 = range[0] + 0.5, - range1 = range[range.length - 1] + 0.5, - position = (scale.bandwidth ? center : identity$5)(scale.copy()), - selection = context.selection ? context.selection() : context, - path = selection.selectAll(".domain").data([null]), - tick = selection.selectAll(".tick").data(values, scale).order(), - tickExit = tick.exit(), - tickEnter = tick.enter().append("g").attr("class", "tick"), - line = tick.select("line"), - text = tick.select("text"), - k = orient === top || orient === left ? -1 : 1, - x, y = orient === left || orient === right ? (x = "x", "y") : (x = "y", "x"); +function equirectangularRaw(lambda, phi) { + return [lambda, phi]; +} - path = path.merge(path.enter().insert("path", ".tick") - .attr("class", "domain") - .attr("stroke", "#000")); +equirectangularRaw.invert = equirectangularRaw; - tick = tick.merge(tickEnter); +var equirectangular = function() { + return projection(equirectangularRaw) + .scale(152.63); +}; - line = line.merge(tickEnter.append("line") - .attr("stroke", "#000") - .attr(x + "2", k * tickSizeInner) - .attr(y + "1", 0.5) - .attr(y + "2", 0.5)); +function conicEquidistantRaw(y0, y1) { + var cy0 = cos$1(y0), + n = y0 === y1 ? sin$1(y0) : (cy0 - cos$1(y1)) / (y1 - y0), + g = cy0 / n + y0; - text = text.merge(tickEnter.append("text") - .attr("fill", "#000") - .attr(x, k * spacing) - .attr(y, 0.5) - .attr("dy", orient === top ? "0em" : orient === bottom ? "0.71em" : "0.32em")); + if (abs(n) < epsilon$2) return equirectangularRaw; - if (context !== selection) { - path = path.transition(context); - tick = tick.transition(context); - line = line.transition(context); - text = text.transition(context); + function project(x, y) { + var gy = g - y, nx = n * x; + return [gy * sin$1(nx), g - gy * cos$1(nx)]; + } - tickExit = tickExit.transition(context) - .attr("opacity", epsilon$2) - .attr("transform", function(d) { return transform(position, this.parentNode.__axis || position, d); }); + project.invert = function(x, y) { + var gy = g - y; + return [atan2(x, abs(gy)) / n * sign(gy), g - sign(n) * sqrt(x * x + gy * gy)]; + }; - tickEnter - .attr("opacity", epsilon$2) - .attr("transform", function(d) { return transform(this.parentNode.__axis || position, position, d); }); - } + return project; +} - tickExit.remove(); +var conicEquidistant = function() { + return conicProjection(conicEquidistantRaw) + .scale(131.154) + .center([0, 13.9389]); +}; - path - .attr("d", orient === left || orient == right - ? "M" + k * tickSizeOuter + "," + range0 + "H0.5V" + range1 + "H" + k * tickSizeOuter - : "M" + range0 + "," + k * tickSizeOuter + "V0.5H" + range1 + "V" + k * tickSizeOuter); +function gnomonicRaw(x, y) { + var cy = cos$1(y), k = cos$1(x) * cy; + return [cy * sin$1(x) / k, sin$1(y) / k]; +} - tick - .attr("opacity", 1) - .attr("transform", function(d) { return transform(position, position, d); }); +gnomonicRaw.invert = azimuthalInvert(atan); - line - .attr(x + "2", k * tickSizeInner); +var gnomonic = function() { + return projection(gnomonicRaw) + .scale(144.049) + .clipAngle(60); +}; - text - .attr(x, k * spacing) - .text(format); +function scaleTranslate(kx, ky, tx, ty) { + return kx === 1 && ky === 1 && tx === 0 && ty === 0 ? identity$4 : transformer({ + point: function(x, y) { + this.stream.point(x * kx + tx, y * ky + ty); + } + }); +} - selection.filter(entering) - .attr("fill", "none") - .attr("font-size", 10) - .attr("font-family", "sans-serif") - .attr("text-anchor", orient === right ? "start" : orient === left ? "end" : "middle"); +var identity$5 = function() { + var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, transform = identity$4, // scale, translate and reflect + x0 = null, y0, x1, y1, clip = identity$4, // clip extent + cache, + cacheStream, + projection; - selection - .each(function() { this.__axis = position; }); + function reset() { + cache = cacheStream = null; + return projection; } - axis.scale = function(_) { - return arguments.length ? (scale = _, axis) : scale; - }; - - axis.ticks = function() { - return tickArguments = slice$4.call(arguments), axis; - }; - - axis.tickArguments = function(_) { - return arguments.length ? (tickArguments = _ == null ? [] : slice$4.call(_), axis) : tickArguments.slice(); + return projection = { + stream: function(stream) { + return cache && cacheStream === stream ? cache : cache = transform(clip(cacheStream = stream)); + }, + clipExtent: function(_) { + return arguments.length ? (clip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]]; + }, + scale: function(_) { + return arguments.length ? (transform = scaleTranslate((k = +_) * sx, k * sy, tx, ty), reset()) : k; + }, + translate: function(_) { + return arguments.length ? (transform = scaleTranslate(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty]; + }, + reflectX: function(_) { + return arguments.length ? (transform = scaleTranslate(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0; + }, + reflectY: function(_) { + return arguments.length ? (transform = scaleTranslate(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0; + }, + fitExtent: function(extent, object) { + return fitExtent(projection, extent, object); + }, + fitSize: function(size, object) { + return fitSize(projection, size, object); + } }; +}; - axis.tickValues = function(_) { - return arguments.length ? (tickValues = _ == null ? null : slice$4.call(_), axis) : tickValues && tickValues.slice(); - }; +function orthographicRaw(x, y) { + return [cos$1(y) * sin$1(x), sin$1(y)]; +} - axis.tickFormat = function(_) { - return arguments.length ? (tickFormat = _, axis) : tickFormat; - }; +orthographicRaw.invert = azimuthalInvert(asin); - axis.tickSize = function(_) { - return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner; - }; +var orthographic = function() { + return projection(orthographicRaw) + .scale(249.5) + .clipAngle(90 + epsilon$2); +}; - axis.tickSizeInner = function(_) { - return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner; - }; +function stereographicRaw(x, y) { + var cy = cos$1(y), k = 1 + cos$1(x) * cy; + return [cy * sin$1(x) / k, sin$1(y) / k]; +} - axis.tickSizeOuter = function(_) { - return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter; - }; +stereographicRaw.invert = azimuthalInvert(function(z) { + return 2 * atan(z); +}); - axis.tickPadding = function(_) { - return arguments.length ? (tickPadding = +_, axis) : tickPadding; - }; +var stereographic = function() { + return projection(stereographicRaw) + .scale(250) + .clipAngle(142); +}; - return axis; +function transverseMercatorRaw(lambda, phi) { + return [log(tan((halfPi$2 + phi) / 2)), -lambda]; } -function axisTop(scale) { - return axis(top, scale); -} +transverseMercatorRaw.invert = function(x, y) { + return [-y, 2 * atan(exp(x)) - halfPi$2]; +}; -function axisRight(scale) { - return axis(right, scale); -} +var transverseMercator = function() { + var m = mercatorProjection(transverseMercatorRaw), + center = m.center, + rotate = m.rotate; -function axisBottom(scale) { - return axis(bottom, scale); -} + m.center = function(_) { + return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]); + }; -function axisLeft(scale) { - return axis(left, scale); -} + m.rotate = function(_) { + return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]); + }; + + return rotate([0, 0, 90]) + .scale(159.155); +}; function defaultSeparation(a, b) { return a.parent === b.parent ? 1 : 2; @@ -9091,6 +9537,19 @@ var cluster = function() { return cluster; }; +function count(node) { + var sum = 0, + children = node.children, + i = children && children.length; + if (!i) sum = 1; + else while (--i >= 0) sum += children[i].value; + node.value = sum; +} + +var node_count = function() { + return this.eachAfter(count); +}; + var node_each = function(callback) { var node = this, current, next = [node], children, i, n; do { @@ -9269,6 +9728,7 @@ function Node(data) { Node.prototype = hierarchy.prototype = { constructor: Node, + count: node_count, each: node_each, eachAfter: node_eachAfter, eachBefore: node_eachBefore, @@ -9429,12 +9889,15 @@ function intersects(a, b) { var dx = b.x - a.x, dy = b.y - a.y, dr = a.r + b.r; - return dr * dr > dx * dx + dy * dy; + return dr * dr - 1e-6 > dx * dx + dy * dy; } -function distance2(circle, x, y) { - var dx = circle.x - x, - dy = circle.y - y; +function distance2(node, x, y) { + var a = node._, + b = node.next._, + ab = a.r + b.r, + dx = (a.x * b.r + b.x * a.r) / ab - x, + dy = (a.y * b.r + b.y * a.r) / ab - y; return dx * dx + dy * dy; } @@ -9478,36 +9941,26 @@ function packEnclose(circles) { // Attempt to place each remaining circle… pack: for (i = 3; i < n; ++i) { place(a._, b._, c = circles[i]), c = new Node$1(c); - - // If there are only three elements in the front-chain… - if ((k = a.previous) === (j = b.next)) { - // If the new circle intersects the third circle, - // rotate the front chain to try the next position. - if (intersects(j._, c._)) { - a = b, b = j, --i; - continue pack; - } - } - - // Find the closest intersecting circle on the front-chain, if any. - else { - sj = j._.r, sk = k._.r; - do { - if (sj <= sk) { - if (intersects(j._, c._)) { - b = j, a.next = b, b.previous = a, --i; - continue pack; - } - j = j.next, sj += j._.r; - } else { - if (intersects(k._, c._)) { - a = k, a.next = b, b.previous = a, --i; - continue pack; - } - k = k.previous, sk += k._.r; + + // Find the closest intersecting circle on the front-chain, if any. + // “Closeness” is determined by linear distance along the front-chain. + // “Ahead” or “behind” is likewise determined by linear distance. + j = b.next, k = a.previous, sj = b._.r, sk = a._.r; + do { + if (sj <= sk) { + if (intersects(j._, c._)) { + b = j, a.next = b, b.previous = a, --i; + continue pack; } - } while (j !== k.next); - } + sj += j._.r, j = j.next; + } else { + if (intersects(k._, c._)) { + a = k, a.next = b, b.previous = a, --i; + continue pack; + } + sk += k._.r, k = k.previous; + } + } while (j !== k.next); // Success! Insert the new circle c between a and b. c.previous = a, c.next = b, a.next = b.previous = b = c; @@ -9517,10 +9970,10 @@ function packEnclose(circles) { ox += ca * c._.x; oy += ca * c._.y; - // Compute the new closest circle a to centroid. - aa = distance2(a._, cx = ox / oa, cy = oy / oa); + // Compute the new closest circle pair to the centroid. + aa = distance2(a, cx = ox / oa, cy = oy / oa); while ((c = c.next) !== b) { - if ((ca = distance2(c._, cx, cy)) < aa) { + if ((ca = distance2(c, cx, cy)) < aa) { a = c, aa = ca; } } @@ -9554,17 +10007,17 @@ function constantZero() { return 0; } -var constant$6 = function(x) { +var constant$8 = function(x) { return function() { return x; }; }; -function defaultRadius(d) { +function defaultRadius$1(d) { return Math.sqrt(d.value); } -var index = function() { +var index$2 = function() { var radius = null, dx = 1, dy = 1, @@ -9577,7 +10030,7 @@ var index = function() { .eachAfter(packChildren(padding, 0.5)) .eachBefore(translateChild(1)); } else { - root.eachBefore(radiusLeaf(defaultRadius)) + root.eachBefore(radiusLeaf(defaultRadius$1)) .eachAfter(packChildren(constantZero, 1)) .eachAfter(packChildren(padding, root.r / Math.min(dx, dy))) .eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r))); @@ -9594,7 +10047,7 @@ var index = function() { }; pack.padding = function(x) { - return arguments.length ? (padding = typeof x === "function" ? x : constant$6(+x), pack) : padding; + return arguments.length ? (padding = typeof x === "function" ? x : constant$8(+x), pack) : padding; }; return pack; @@ -10077,7 +10530,7 @@ function squarifyRatio(ratio, parent, x0, y0, x1, y1) { return rows; } -var squarify = (function custom(ratio) { +var squarify = ((function custom(ratio) { function squarify(parent, x0, y0, x1, y1) { squarifyRatio(ratio, parent, x0, y0, x1, y1); @@ -10088,9 +10541,9 @@ var squarify = (function custom(ratio) { }; return squarify; -})(phi); +}))(phi); -var index$1 = function() { +var index$3 = function() { var tile = squarify, round = false, dx = 1, @@ -10113,5902 +10566,5615 @@ var index$1 = function() { return root; } - function positionNode(node) { - var p = paddingStack[node.depth], - x0 = node.x0 + p, - y0 = node.y0 + p, - x1 = node.x1 - p, - y1 = node.y1 - p; - if (x1 < x0) x0 = x1 = (x0 + x1) / 2; - if (y1 < y0) y0 = y1 = (y0 + y1) / 2; - node.x0 = x0; - node.y0 = y0; - node.x1 = x1; - node.y1 = y1; - if (node.children) { - p = paddingStack[node.depth + 1] = paddingInner(node) / 2; - x0 += paddingLeft(node) - p; - y0 += paddingTop(node) - p; - x1 -= paddingRight(node) - p; - y1 -= paddingBottom(node) - p; - if (x1 < x0) x0 = x1 = (x0 + x1) / 2; - if (y1 < y0) y0 = y1 = (y0 + y1) / 2; - tile(node, x0, y0, x1, y1); - } - } - - treemap.round = function(x) { - return arguments.length ? (round = !!x, treemap) : round; - }; - - treemap.size = function(x) { - return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy]; - }; - - treemap.tile = function(x) { - return arguments.length ? (tile = required(x), treemap) : tile; - }; - - treemap.padding = function(x) { - return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner(); - }; - - treemap.paddingInner = function(x) { - return arguments.length ? (paddingInner = typeof x === "function" ? x : constant$6(+x), treemap) : paddingInner; - }; - - treemap.paddingOuter = function(x) { - return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop(); - }; - - treemap.paddingTop = function(x) { - return arguments.length ? (paddingTop = typeof x === "function" ? x : constant$6(+x), treemap) : paddingTop; - }; - - treemap.paddingRight = function(x) { - return arguments.length ? (paddingRight = typeof x === "function" ? x : constant$6(+x), treemap) : paddingRight; - }; - - treemap.paddingBottom = function(x) { - return arguments.length ? (paddingBottom = typeof x === "function" ? x : constant$6(+x), treemap) : paddingBottom; - }; - - treemap.paddingLeft = function(x) { - return arguments.length ? (paddingLeft = typeof x === "function" ? x : constant$6(+x), treemap) : paddingLeft; - }; - - return treemap; -}; - -var binary = function(parent, x0, y0, x1, y1) { - var nodes = parent.children, - i, n = nodes.length, - sum, sums = new Array(n + 1); - - for (sums[0] = sum = i = 0; i < n; ++i) { - sums[i + 1] = sum += nodes[i].value; - } - - partition(0, n, parent.value, x0, y0, x1, y1); - - function partition(i, j, value, x0, y0, x1, y1) { - if (i >= j - 1) { - var node = nodes[i]; - node.x0 = x0, node.y0 = y0; - node.x1 = x1, node.y1 = y1; - return; - } - - var valueOffset = sums[i], - valueTarget = (value / 2) + valueOffset, - k = i + 1, - hi = j - 1; - - while (k < hi) { - var mid = k + hi >>> 1; - if (sums[mid] < valueTarget) k = mid + 1; - else hi = mid; - } - - var valueLeft = sums[k] - valueOffset, - valueRight = value - valueLeft; - - if ((y1 - y0) > (x1 - x0)) { - var yk = (y0 * valueRight + y1 * valueLeft) / value; - partition(i, k, valueLeft, x0, y0, x1, yk); - partition(k, j, valueRight, x0, yk, x1, y1); - } else { - var xk = (x0 * valueRight + x1 * valueLeft) / value; - partition(i, k, valueLeft, x0, y0, xk, y1); - partition(k, j, valueRight, xk, y0, x1, y1); - } - } -}; - -var sliceDice = function(parent, x0, y0, x1, y1) { - (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1); -}; - -var resquarify = (function custom(ratio) { - - function resquarify(parent, x0, y0, x1, y1) { - if ((rows = parent._squarify) && (rows.ratio === ratio)) { - var rows, - row, - nodes, - i, - j = -1, - n, - m = rows.length, - value = parent.value; - - while (++j < m) { - row = rows[j], nodes = row.children; - for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value; - if (row.dice) treemapDice(row, x0, y0, x1, y0 += (y1 - y0) * row.value / value); - else treemapSlice(row, x0, y0, x0 += (x1 - x0) * row.value / value, y1); - value -= row.value; - } - } else { - parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1); - rows.ratio = ratio; - } - } - - resquarify.ratio = function(x) { - return custom((x = +x) > 1 ? x : 1); - }; - - return resquarify; -})(phi); - -var center$1 = function(x, y) { - var nodes; - - if (x == null) x = 0; - if (y == null) y = 0; - - function force() { - var i, - n = nodes.length, - node, - sx = 0, - sy = 0; - - for (i = 0; i < n; ++i) { - node = nodes[i], sx += node.x, sy += node.y; - } - - for (sx = sx / n - x, sy = sy / n - y, i = 0; i < n; ++i) { - node = nodes[i], node.x -= sx, node.y -= sy; - } - } - - force.initialize = function(_) { - nodes = _; - }; - - force.x = function(_) { - return arguments.length ? (x = +_, force) : x; - }; - - force.y = function(_) { - return arguments.length ? (y = +_, force) : y; - }; - - return force; -}; - -var constant$7 = function(x) { - return function() { - return x; - }; -}; - -var jiggle = function() { - return (Math.random() - 0.5) * 1e-6; -}; - -function x$1(d) { - return d.x + d.vx; -} - -function y$1(d) { - return d.y + d.vy; -} - -var collide = function(radius) { - var nodes, - radii, - strength = 1, - iterations = 1; - - if (typeof radius !== "function") radius = constant$7(radius == null ? 1 : +radius); - - function force() { - var i, n = nodes.length, - tree, - node, - xi, - yi, - ri, - ri2; - - for (var k = 0; k < iterations; ++k) { - tree = quadtree(nodes, x$1, y$1).visitAfter(prepare); - for (i = 0; i < n; ++i) { - node = nodes[i]; - ri = radii[node.index], ri2 = ri * ri; - xi = node.x + node.vx; - yi = node.y + node.vy; - tree.visit(apply); - } - } - - function apply(quad, x0, y0, x1, y1) { - var data = quad.data, rj = quad.r, r = ri + rj; - if (data) { - if (data.index > node.index) { - var x = xi - data.x - data.vx, - y = yi - data.y - data.vy, - l = x * x + y * y; - if (l < r * r) { - if (x === 0) x = jiggle(), l += x * x; - if (y === 0) y = jiggle(), l += y * y; - l = (r - (l = Math.sqrt(l))) / l * strength; - node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj)); - node.vy += (y *= l) * r; - data.vx -= x * (r = 1 - r); - data.vy -= y * r; - } - } - return; - } - return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r; - } - } - - function prepare(quad) { - if (quad.data) return quad.r = radii[quad.data.index]; - for (var i = quad.r = 0; i < 4; ++i) { - if (quad[i] && quad[i].r > quad.r) { - quad.r = quad[i].r; - } + function positionNode(node) { + var p = paddingStack[node.depth], + x0 = node.x0 + p, + y0 = node.y0 + p, + x1 = node.x1 - p, + y1 = node.y1 - p; + if (x1 < x0) x0 = x1 = (x0 + x1) / 2; + if (y1 < y0) y0 = y1 = (y0 + y1) / 2; + node.x0 = x0; + node.y0 = y0; + node.x1 = x1; + node.y1 = y1; + if (node.children) { + p = paddingStack[node.depth + 1] = paddingInner(node) / 2; + x0 += paddingLeft(node) - p; + y0 += paddingTop(node) - p; + x1 -= paddingRight(node) - p; + y1 -= paddingBottom(node) - p; + if (x1 < x0) x0 = x1 = (x0 + x1) / 2; + if (y1 < y0) y0 = y1 = (y0 + y1) / 2; + tile(node, x0, y0, x1, y1); } } - function initialize() { - if (!nodes) return; - var i, n = nodes.length, node; - radii = new Array(n); - for (i = 0; i < n; ++i) node = nodes[i], radii[node.index] = +radius(node, i, nodes); - } + treemap.round = function(x) { + return arguments.length ? (round = !!x, treemap) : round; + }; - force.initialize = function(_) { - nodes = _; - initialize(); + treemap.size = function(x) { + return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy]; }; - force.iterations = function(_) { - return arguments.length ? (iterations = +_, force) : iterations; + treemap.tile = function(x) { + return arguments.length ? (tile = required(x), treemap) : tile; }; - force.strength = function(_) { - return arguments.length ? (strength = +_, force) : strength; + treemap.padding = function(x) { + return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner(); }; - force.radius = function(_) { - return arguments.length ? (radius = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : radius; + treemap.paddingInner = function(x) { + return arguments.length ? (paddingInner = typeof x === "function" ? x : constant$8(+x), treemap) : paddingInner; }; - return force; -}; + treemap.paddingOuter = function(x) { + return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop(); + }; -function index$2(d) { - return d.index; -} + treemap.paddingTop = function(x) { + return arguments.length ? (paddingTop = typeof x === "function" ? x : constant$8(+x), treemap) : paddingTop; + }; -function find(nodeById, nodeId) { - var node = nodeById.get(nodeId); - if (!node) throw new Error("missing: " + nodeId); - return node; -} + treemap.paddingRight = function(x) { + return arguments.length ? (paddingRight = typeof x === "function" ? x : constant$8(+x), treemap) : paddingRight; + }; -var link = function(links) { - var id = index$2, - strength = defaultStrength, - strengths, - distance = constant$7(30), - distances, - nodes, - count, - bias, - iterations = 1; + treemap.paddingBottom = function(x) { + return arguments.length ? (paddingBottom = typeof x === "function" ? x : constant$8(+x), treemap) : paddingBottom; + }; - if (links == null) links = []; + treemap.paddingLeft = function(x) { + return arguments.length ? (paddingLeft = typeof x === "function" ? x : constant$8(+x), treemap) : paddingLeft; + }; - function defaultStrength(link) { - return 1 / Math.min(count[link.source.index], count[link.target.index]); - } + return treemap; +}; - function force(alpha) { - for (var k = 0, n = links.length; k < iterations; ++k) { - for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) { - link = links[i], source = link.source, target = link.target; - x = target.x + target.vx - source.x - source.vx || jiggle(); - y = target.y + target.vy - source.y - source.vy || jiggle(); - l = Math.sqrt(x * x + y * y); - l = (l - distances[i]) / l * alpha * strengths[i]; - x *= l, y *= l; - target.vx -= x * (b = bias[i]); - target.vy -= y * b; - source.vx += x * (b = 1 - b); - source.vy += y * b; - } - } - } +var binary = function(parent, x0, y0, x1, y1) { + var nodes = parent.children, + i, n = nodes.length, + sum, sums = new Array(n + 1); - function initialize() { - if (!nodes) return; + for (sums[0] = sum = i = 0; i < n; ++i) { + sums[i + 1] = sum += nodes[i].value; + } - var i, - n = nodes.length, - m = links.length, - nodeById = map$1(nodes, id), - link; + partition(0, n, parent.value, x0, y0, x1, y1); - for (i = 0, count = new Array(n); i < m; ++i) { - link = links[i], link.index = i; - if (typeof link.source !== "object") link.source = find(nodeById, link.source); - if (typeof link.target !== "object") link.target = find(nodeById, link.target); - count[link.source.index] = (count[link.source.index] || 0) + 1; - count[link.target.index] = (count[link.target.index] || 0) + 1; + function partition(i, j, value, x0, y0, x1, y1) { + if (i >= j - 1) { + var node = nodes[i]; + node.x0 = x0, node.y0 = y0; + node.x1 = x1, node.y1 = y1; + return; } - for (i = 0, bias = new Array(m); i < m; ++i) { - link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]); + var valueOffset = sums[i], + valueTarget = (value / 2) + valueOffset, + k = i + 1, + hi = j - 1; + + while (k < hi) { + var mid = k + hi >>> 1; + if (sums[mid] < valueTarget) k = mid + 1; + else hi = mid; } - strengths = new Array(m), initializeStrength(); - distances = new Array(m), initializeDistance(); - } + if ((valueTarget - sums[k - 1]) < (sums[k] - valueTarget) && i + 1 < k) --k; - function initializeStrength() { - if (!nodes) return; + var valueLeft = sums[k] - valueOffset, + valueRight = value - valueLeft; - for (var i = 0, n = links.length; i < n; ++i) { - strengths[i] = +strength(links[i], i, links); + if ((x1 - x0) > (y1 - y0)) { + var xk = (x0 * valueRight + x1 * valueLeft) / value; + partition(i, k, valueLeft, x0, y0, xk, y1); + partition(k, j, valueRight, xk, y0, x1, y1); + } else { + var yk = (y0 * valueRight + y1 * valueLeft) / value; + partition(i, k, valueLeft, x0, y0, x1, yk); + partition(k, j, valueRight, x0, yk, x1, y1); } } +}; - function initializeDistance() { - if (!nodes) return; +var sliceDice = function(parent, x0, y0, x1, y1) { + (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1); +}; - for (var i = 0, n = links.length; i < n; ++i) { - distances[i] = +distance(links[i], i, links); - } - } +var resquarify = ((function custom(ratio) { - force.initialize = function(_) { - nodes = _; - initialize(); - }; + function resquarify(parent, x0, y0, x1, y1) { + if ((rows = parent._squarify) && (rows.ratio === ratio)) { + var rows, + row, + nodes, + i, + j = -1, + n, + m = rows.length, + value = parent.value; - force.links = function(_) { - return arguments.length ? (links = _, initialize(), force) : links; - }; + while (++j < m) { + row = rows[j], nodes = row.children; + for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value; + if (row.dice) treemapDice(row, x0, y0, x1, y0 += (y1 - y0) * row.value / value); + else treemapSlice(row, x0, y0, x0 += (x1 - x0) * row.value / value, y1); + value -= row.value; + } + } else { + parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1); + rows.ratio = ratio; + } + } - force.id = function(_) { - return arguments.length ? (id = _, force) : id; + resquarify.ratio = function(x) { + return custom((x = +x) > 1 ? x : 1); }; - force.iterations = function(_) { - return arguments.length ? (iterations = +_, force) : iterations; - }; + return resquarify; +}))(phi); - force.strength = function(_) { - return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initializeStrength(), force) : strength; - }; +var area$1 = function(polygon) { + var i = -1, + n = polygon.length, + a, + b = polygon[n - 1], + area = 0; - force.distance = function(_) { - return arguments.length ? (distance = typeof _ === "function" ? _ : constant$7(+_), initializeDistance(), force) : distance; - }; + while (++i < n) { + a = b; + b = polygon[i]; + area += a[1] * b[0] - a[0] * b[1]; + } - return force; + return area / 2; }; -function x$2(d) { - return d.x; -} - -function y$2(d) { - return d.y; -} - -var initialRadius = 10; -var initialAngle = Math.PI * (3 - Math.sqrt(5)); - -var simulation = function(nodes) { - var simulation, - alpha = 1, - alphaMin = 0.001, - alphaDecay = 1 - Math.pow(alphaMin, 1 / 300), - alphaTarget = 0, - velocityDecay = 0.6, - forces = map$1(), - stepper = timer(step), - event = dispatch("tick", "end"); - - if (nodes == null) nodes = []; +var centroid$1 = function(polygon) { + var i = -1, + n = polygon.length, + x = 0, + y = 0, + a, + b = polygon[n - 1], + c, + k = 0; - function step() { - tick(); - event.call("tick", simulation); - if (alpha < alphaMin) { - stepper.stop(); - event.call("end", simulation); - } + while (++i < n) { + a = b; + b = polygon[i]; + k += c = a[0] * b[1] - b[0] * a[1]; + x += (a[0] + b[0]) * c; + y += (a[1] + b[1]) * c; } - function tick() { - var i, n = nodes.length, node; + return k *= 3, [x / k, y / k]; +}; - alpha += (alphaTarget - alpha) * alphaDecay; +// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of +// the 3D cross product in a quadrant I Cartesian coordinate system (+x is +// right, +y is up). Returns a positive value if ABC is counter-clockwise, +// negative if clockwise, and zero if the points are collinear. +var cross$1 = function(a, b, c) { + return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]); +}; - forces.each(function(force) { - force(alpha); - }); +function lexicographicOrder(a, b) { + return a[0] - b[0] || a[1] - b[1]; +} - for (i = 0; i < n; ++i) { - node = nodes[i]; - if (node.fx == null) node.x += node.vx *= velocityDecay; - else node.x = node.fx, node.vx = 0; - if (node.fy == null) node.y += node.vy *= velocityDecay; - else node.y = node.fy, node.vy = 0; - } - } +// Computes the upper convex hull per the monotone chain algorithm. +// Assumes points.length >= 3, is sorted by x, unique in y. +// Returns an array of indices into points in left-to-right order. +function computeUpperHullIndexes(points) { + var n = points.length, + indexes = [0, 1], + size = 2; - function initializeNodes() { - for (var i = 0, n = nodes.length, node; i < n; ++i) { - node = nodes[i], node.index = i; - if (isNaN(node.x) || isNaN(node.y)) { - var radius = initialRadius * Math.sqrt(i), angle = i * initialAngle; - node.x = radius * Math.cos(angle); - node.y = radius * Math.sin(angle); - } - if (isNaN(node.vx) || isNaN(node.vy)) { - node.vx = node.vy = 0; - } - } + for (var i = 2; i < n; ++i) { + while (size > 1 && cross$1(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size; + indexes[size++] = i; } - function initializeForce(force) { - if (force.initialize) force.initialize(nodes); - return force; - } + return indexes.slice(0, size); // remove popped points +} - initializeNodes(); +var hull = function(points) { + if ((n = points.length) < 3) return null; - return simulation = { - tick: tick, + var i, + n, + sortedPoints = new Array(n), + flippedPoints = new Array(n); - restart: function() { - return stepper.restart(step), simulation; - }, + for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i]; + sortedPoints.sort(lexicographicOrder); + for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]]; - stop: function() { - return stepper.stop(), simulation; - }, + var upperIndexes = computeUpperHullIndexes(sortedPoints), + lowerIndexes = computeUpperHullIndexes(flippedPoints); - nodes: function(_) { - return arguments.length ? (nodes = _, initializeNodes(), forces.each(initializeForce), simulation) : nodes; - }, + // Construct the hull polygon, removing possible duplicate endpoints. + var skipLeft = lowerIndexes[0] === upperIndexes[0], + skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1], + hull = []; - alpha: function(_) { - return arguments.length ? (alpha = +_, simulation) : alpha; - }, + // Add upper hull in right-to-l order. + // Then add lower hull in left-to-right order. + for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]); + for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]); - alphaMin: function(_) { - return arguments.length ? (alphaMin = +_, simulation) : alphaMin; - }, + return hull; +}; - alphaDecay: function(_) { - return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay; - }, +var contains$1 = function(polygon, point) { + var n = polygon.length, + p = polygon[n - 1], + x = point[0], y = point[1], + x0 = p[0], y0 = p[1], + x1, y1, + inside = false; - alphaTarget: function(_) { - return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget; - }, + for (var i = 0; i < n; ++i) { + p = polygon[i], x1 = p[0], y1 = p[1]; + if (((y1 > y) !== (y0 > y)) && (x < (x0 - x1) * (y - y1) / (y0 - y1) + x1)) inside = !inside; + x0 = x1, y0 = y1; + } - velocityDecay: function(_) { - return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay; - }, + return inside; +}; - force: function(name, _) { - return arguments.length > 1 ? ((_ == null ? forces.remove(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name); - }, +var length$2 = function(polygon) { + var i = -1, + n = polygon.length, + b = polygon[n - 1], + xa, + ya, + xb = b[0], + yb = b[1], + perimeter = 0; - find: function(x, y, radius) { - var i = 0, - n = nodes.length, - dx, - dy, - d2, - node, - closest; + while (++i < n) { + xa = xb; + ya = yb; + b = polygon[i]; + xb = b[0]; + yb = b[1]; + xa -= xb; + ya -= yb; + perimeter += Math.sqrt(xa * xa + ya * ya); + } - if (radius == null) radius = Infinity; - else radius *= radius; + return perimeter; +}; - for (i = 0; i < n; ++i) { - node = nodes[i]; - dx = x - node.x; - dy = y - node.y; - d2 = dx * dx + dy * dy; - if (d2 < radius) closest = node, radius = d2; - } +var slice$3 = [].slice; - return closest; - }, +var noabort = {}; - on: function(name, _) { - return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name); - } - }; -}; +function Queue(size) { + if (!(size >= 1)) throw new Error; + this._size = size; + this._call = + this._error = null; + this._tasks = []; + this._data = []; + this._waiting = + this._active = + this._ended = + this._start = 0; // inside a synchronous task callback? +} -var manyBody = function() { - var nodes, - node, - alpha, - strength = constant$7(-30), - strengths, - distanceMin2 = 1, - distanceMax2 = Infinity, - theta2 = 0.81; +Queue.prototype = queue.prototype = { + constructor: Queue, + defer: function(callback) { + if (typeof callback !== "function" || this._call) throw new Error; + if (this._error != null) return this; + var t = slice$3.call(arguments, 1); + t.push(callback); + ++this._waiting, this._tasks.push(t); + poke$1(this); + return this; + }, + abort: function() { + if (this._error == null) abort(this, new Error("abort")); + return this; + }, + await: function(callback) { + if (typeof callback !== "function" || this._call) throw new Error; + this._call = function(error, results) { callback.apply(null, [error].concat(results)); }; + maybeNotify(this); + return this; + }, + awaitAll: function(callback) { + if (typeof callback !== "function" || this._call) throw new Error; + this._call = callback; + maybeNotify(this); + return this; + } +}; - function force(_) { - var i, n = nodes.length, tree = quadtree(nodes, x$2, y$2).visitAfter(accumulate); - for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply); +function poke$1(q) { + if (!q._start) { + try { start$1(q); } // let the current task complete + catch (e) { + if (q._tasks[q._ended + q._active - 1]) abort(q, e); // task errored synchronously + else if (!q._data) throw e; // await callback errored synchronously + } } +} - function initialize() { - if (!nodes) return; - var i, n = nodes.length, node; - strengths = new Array(n); - for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes); +function start$1(q) { + while (q._start = q._waiting && q._active < q._size) { + var i = q._ended + q._active, + t = q._tasks[i], + j = t.length - 1, + c = t[j]; + t[j] = end(q, i); + --q._waiting, ++q._active; + t = c.apply(null, t); + if (!q._tasks[i]) continue; // task finished synchronously + q._tasks[i] = t || noabort; } +} - function accumulate(quad) { - var strength = 0, q, c, x$$1, y$$1, i; +function end(q, i) { + return function(e, r) { + if (!q._tasks[i]) return; // ignore multiple callbacks + --q._active, ++q._ended; + q._tasks[i] = null; + if (q._error != null) return; // ignore secondary errors + if (e != null) { + abort(q, e); + } else { + q._data[i] = r; + if (q._waiting) poke$1(q); + else maybeNotify(q); + } + }; +} + +function abort(q, e) { + var i = q._tasks.length, t; + q._error = e; // ignore active callbacks + q._data = undefined; // allow gc + q._waiting = NaN; // prevent starting - // For internal nodes, accumulate forces from child quadrants. - if (quad.length) { - for (x$$1 = y$$1 = i = 0; i < 4; ++i) { - if ((q = quad[i]) && (c = q.value)) { - strength += c, x$$1 += c * q.x, y$$1 += c * q.y; - } + while (--i >= 0) { + if (t = q._tasks[i]) { + q._tasks[i] = null; + if (t.abort) { + try { t.abort(); } + catch (e) { /* ignore */ } } - quad.x = x$$1 / strength; - quad.y = y$$1 / strength; } + } - // For leaf nodes, accumulate forces from coincident quadrants. - else { - q = quad; - q.x = q.data.x; - q.y = q.data.y; - do strength += strengths[q.data.index]; - while (q = q.next); - } + q._active = NaN; // allow notification + maybeNotify(q); +} - quad.value = strength; +function maybeNotify(q) { + if (!q._active && q._call) { + var d = q._data; + q._data = undefined; // allow gc + q._call(q._error, d); } +} - function apply(quad, x1, _, x2) { - if (!quad.value) return true; - - var x$$1 = quad.x - node.x, - y$$1 = quad.y - node.y, - w = x2 - x1, - l = x$$1 * x$$1 + y$$1 * y$$1; +function queue(concurrency) { + return new Queue(arguments.length ? +concurrency : Infinity); +} - // Apply the Barnes-Hut approximation if possible. - // Limit forces for very close nodes; randomize direction if coincident. - if (w * w / theta2 < l) { - if (l < distanceMax2) { - if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1; - if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1; - if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l); - node.vx += x$$1 * quad.value * alpha / l; - node.vy += y$$1 * quad.value * alpha / l; - } - return true; - } +var uniform = function(min, max) { + min = min == null ? 0 : +min; + max = max == null ? 1 : +max; + if (arguments.length === 1) max = min, min = 0; + else max -= min; + return function() { + return Math.random() * max + min; + }; +}; - // Otherwise, process points directly. - else if (quad.length || l >= distanceMax2) return; +var normal = function(mu, sigma) { + var x, r; + mu = mu == null ? 0 : +mu; + sigma = sigma == null ? 1 : +sigma; + return function() { + var y; - // Limit forces for very close nodes; randomize direction if coincident. - if (quad.data !== node || quad.next) { - if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1; - if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1; - if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l); - } + // If available, use the second previously-generated uniform random. + if (x != null) y = x, x = null; - do if (quad.data !== node) { - w = strengths[quad.data.index] * alpha / l; - node.vx += x$$1 * w; - node.vy += y$$1 * w; - } while (quad = quad.next); - } + // Otherwise, generate a new x and y. + else do { + x = Math.random() * 2 - 1; + y = Math.random() * 2 - 1; + r = x * x + y * y; + } while (!r || r > 1); - force.initialize = function(_) { - nodes = _; - initialize(); + return mu + sigma * y * Math.sqrt(-2 * Math.log(r) / r); }; +}; - force.strength = function(_) { - return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : strength; +var logNormal = function() { + var randomNormal = normal.apply(this, arguments); + return function() { + return Math.exp(randomNormal()); }; +}; - force.distanceMin = function(_) { - return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2); +var irwinHall = function(n) { + return function() { + for (var sum = 0, i = 0; i < n; ++i) sum += Math.random(); + return sum; }; +}; - force.distanceMax = function(_) { - return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2); +var bates = function(n) { + var randomIrwinHall = irwinHall(n); + return function() { + return randomIrwinHall() / n; }; +}; - force.theta = function(_) { - return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2); +var exponential$1 = function(lambda) { + return function() { + return -Math.log(1 - Math.random()) / lambda; }; - - return force; }; -var x$3 = function(x) { - var strength = constant$7(0.1), - nodes, - strengths, - xz; +var request = function(url, callback) { + var request, + event = dispatch("beforesend", "progress", "load", "error"), + mimeType, + headers = map$1(), + xhr = new XMLHttpRequest, + user = null, + password = null, + response, + responseType, + timeout = 0; - if (typeof x !== "function") x = constant$7(x == null ? 0 : +x); + // If IE does not support CORS, use XDomainRequest. + if (typeof XDomainRequest !== "undefined" + && !("withCredentials" in xhr) + && /^(http(s)?:)?\/\//.test(url)) xhr = new XDomainRequest; - function force(alpha) { - for (var i = 0, n = nodes.length, node; i < n; ++i) { - node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha; - } - } + "onload" in xhr + ? xhr.onload = xhr.onerror = xhr.ontimeout = respond + : xhr.onreadystatechange = function(o) { xhr.readyState > 3 && respond(o); }; - function initialize() { - if (!nodes) return; - var i, n = nodes.length; - strengths = new Array(n); - xz = new Array(n); - for (i = 0; i < n; ++i) { - strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes); + function respond(o) { + var status = xhr.status, result; + if (!status && hasResponse(xhr) + || status >= 200 && status < 300 + || status === 304) { + if (response) { + try { + result = response.call(request, xhr); + } catch (e) { + event.call("error", request, e); + return; + } + } else { + result = xhr; + } + event.call("load", request, result); + } else { + event.call("error", request, o); } } - force.initialize = function(_) { - nodes = _; - initialize(); + xhr.onprogress = function(e) { + event.call("progress", request, e); }; - force.strength = function(_) { - return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : strength; - }; + request = { + header: function(name, value) { + name = (name + "").toLowerCase(); + if (arguments.length < 2) return headers.get(name); + if (value == null) headers.remove(name); + else headers.set(name, value + ""); + return request; + }, - force.x = function(_) { - return arguments.length ? (x = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : x; - }; + // If mimeType is non-null and no Accept header is set, a default is used. + mimeType: function(value) { + if (!arguments.length) return mimeType; + mimeType = value == null ? null : value + ""; + return request; + }, - return force; -}; + // Specifies what type the response value should take; + // for instance, arraybuffer, blob, document, or text. + responseType: function(value) { + if (!arguments.length) return responseType; + responseType = value; + return request; + }, -var y$3 = function(y) { - var strength = constant$7(0.1), - nodes, - strengths, - yz; + timeout: function(value) { + if (!arguments.length) return timeout; + timeout = +value; + return request; + }, - if (typeof y !== "function") y = constant$7(y == null ? 0 : +y); + user: function(value) { + return arguments.length < 1 ? user : (user = value == null ? null : value + "", request); + }, - function force(alpha) { - for (var i = 0, n = nodes.length, node; i < n; ++i) { - node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha; - } - } + password: function(value) { + return arguments.length < 1 ? password : (password = value == null ? null : value + "", request); + }, - function initialize() { - if (!nodes) return; - var i, n = nodes.length; - strengths = new Array(n); - yz = new Array(n); - for (i = 0; i < n; ++i) { - strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes); - } - } + // Specify how to convert the response content to a specific type; + // changes the callback value on "load" events. + response: function(value) { + response = value; + return request; + }, + + // Alias for send("GET", …). + get: function(data, callback) { + return request.send("GET", data, callback); + }, + + // Alias for send("POST", …). + post: function(data, callback) { + return request.send("POST", data, callback); + }, + + // If callback is non-null, it will be used for error and load events. + send: function(method, data, callback) { + xhr.open(method, url, true, user, password); + if (mimeType != null && !headers.has("accept")) headers.set("accept", mimeType + ",*/*"); + if (xhr.setRequestHeader) headers.each(function(value, name) { xhr.setRequestHeader(name, value); }); + if (mimeType != null && xhr.overrideMimeType) xhr.overrideMimeType(mimeType); + if (responseType != null) xhr.responseType = responseType; + if (timeout > 0) xhr.timeout = timeout; + if (callback == null && typeof data === "function") callback = data, data = null; + if (callback != null && callback.length === 1) callback = fixCallback(callback); + if (callback != null) request.on("error", callback).on("load", function(xhr) { callback(null, xhr); }); + event.call("beforesend", request, xhr); + xhr.send(data == null ? null : data); + return request; + }, - force.initialize = function(_) { - nodes = _; - initialize(); - }; + abort: function() { + xhr.abort(); + return request; + }, - force.strength = function(_) { - return arguments.length ? (strength = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : strength; + on: function() { + var value = event.on.apply(event, arguments); + return value === event ? request : value; + } }; - force.y = function(_) { - return arguments.length ? (y = typeof _ === "function" ? _ : constant$7(+_), initialize(), force) : y; - }; + if (callback != null) { + if (typeof callback !== "function") throw new Error("invalid callback: " + callback); + return request.get(callback); + } - return force; + return request; }; -function nopropagation() { - exports.event.stopImmediatePropagation(); +function fixCallback(callback) { + return function(error, xhr) { + callback(error == null ? xhr : null); + }; } -var noevent = function() { - exports.event.preventDefault(); - exports.event.stopImmediatePropagation(); -}; - -var dragDisable = function(view) { - var root = view.document.documentElement, - selection$$1 = select(view).on("dragstart.drag", noevent, true); - if ("onselectstart" in root) { - selection$$1.on("selectstart.drag", noevent, true); - } else { - root.__noselect = root.style.MozUserSelect; - root.style.MozUserSelect = "none"; - } -}; - -function yesdrag(view, noclick) { - var root = view.document.documentElement, - selection$$1 = select(view).on("dragstart.drag", null); - if (noclick) { - selection$$1.on("click.drag", noevent, true); - setTimeout(function() { selection$$1.on("click.drag", null); }, 0); - } - if ("onselectstart" in root) { - selection$$1.on("selectstart.drag", null); - } else { - root.style.MozUserSelect = root.__noselect; - delete root.__noselect; - } +function hasResponse(xhr) { + var type = xhr.responseType; + return type && type !== "text" + ? xhr.response // null on error + : xhr.responseText; // "" on error } -var constant$8 = function(x) { - return function() { - return x; +var type$1 = function(defaultMimeType, response) { + return function(url, callback) { + var r = request(url).mimeType(defaultMimeType).response(response); + if (callback != null) { + if (typeof callback !== "function") throw new Error("invalid callback: " + callback); + return r.get(callback); + } + return r; }; }; -function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) { - this.target = target; - this.type = type; - this.subject = subject; - this.identifier = id; - this.active = active; - this.x = x; - this.y = y; - this.dx = dx; - this.dy = dy; - this._ = dispatch; -} - -DragEvent.prototype.on = function() { - var value = this._.on.apply(this._, arguments); - return value === this._ ? this : value; -}; - -// Ignore right-click, since that should open the context menu. -function defaultFilter() { - return !exports.event.button; -} +var html = type$1("text/html", function(xhr) { + return document.createRange().createContextualFragment(xhr.responseText); +}); -function defaultContainer() { - return this.parentNode; -} +var json = type$1("application/json", function(xhr) { + return JSON.parse(xhr.responseText); +}); -function defaultSubject(d) { - return d == null ? {x: exports.event.x, y: exports.event.y} : d; -} +var text = type$1("text/plain", function(xhr) { + return xhr.responseText; +}); -var drag = function() { - var filter = defaultFilter, - container = defaultContainer, - subject = defaultSubject, - gestures = {}, - listeners = dispatch("start", "drag", "end"), - active = 0, - mousemoving, - touchending; +var xml = type$1("application/xml", function(xhr) { + var xml = xhr.responseXML; + if (!xml) throw new Error("parse error"); + return xml; +}); - function drag(selection$$1) { - selection$$1 - .on("mousedown.drag", mousedowned) - .on("touchstart.drag", touchstarted) - .on("touchmove.drag", touchmoved) - .on("touchend.drag touchcancel.drag", touchended) - .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)"); - } +var dsv$1 = function(defaultMimeType, parse) { + return function(url, row, callback) { + if (arguments.length < 3) callback = row, row = null; + var r = request(url).mimeType(defaultMimeType); + r.row = function(_) { return arguments.length ? r.response(responseOf(parse, row = _)) : row; }; + r.row(row); + return callback ? r.get(callback) : r; + }; +}; - function mousedowned() { - if (touchending || !filter.apply(this, arguments)) return; - var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments); - if (!gesture) return; - select(exports.event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true); - dragDisable(exports.event.view); - nopropagation(); - mousemoving = false; - gesture("start"); - } +function responseOf(parse, row) { + return function(request$$1) { + return parse(request$$1.responseText, row); + }; +} - function mousemoved() { - noevent(); - mousemoving = true; - gestures.mouse("drag"); - } +var csv$1 = dsv$1("text/csv", csvParse); - function mouseupped() { - select(exports.event.view).on("mousemove.drag mouseup.drag", null); - yesdrag(exports.event.view, mousemoving); - noevent(); - gestures.mouse("end"); - } +var tsv$1 = dsv$1("text/tab-separated-values", tsvParse); - function touchstarted() { - if (!filter.apply(this, arguments)) return; - var touches$$1 = exports.event.changedTouches, - c = container.apply(this, arguments), - n = touches$$1.length, i, gesture; +var array$2 = Array.prototype; - for (i = 0; i < n; ++i) { - if (gesture = beforestart(touches$$1[i].identifier, c, touch, this, arguments)) { - nopropagation(); - gesture("start"); - } - } - } +var map$3 = array$2.map; +var slice$4 = array$2.slice; - function touchmoved() { - var touches$$1 = exports.event.changedTouches, - n = touches$$1.length, i, gesture; +var implicit = {name: "implicit"}; - for (i = 0; i < n; ++i) { - if (gesture = gestures[touches$$1[i].identifier]) { - noevent(); - gesture("drag"); - } - } - } +function ordinal(range) { + var index = map$1(), + domain = [], + unknown = implicit; - function touchended() { - var touches$$1 = exports.event.changedTouches, - n = touches$$1.length, i, gesture; + range = range == null ? [] : slice$4.call(range); - if (touchending) clearTimeout(touchending); - touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed! - for (i = 0; i < n; ++i) { - if (gesture = gestures[touches$$1[i].identifier]) { - nopropagation(); - gesture("end"); - } + function scale(d) { + var key = d + "", i = index.get(key); + if (!i) { + if (unknown !== implicit) return unknown; + index.set(key, i = domain.push(d)); } + return range[(i - 1) % range.length]; } - function beforestart(id, container, point, that, args) { - var p = point(container, id), s, dx, dy, - sublisteners = listeners.copy(); - - if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() { - if ((exports.event.subject = s = subject.apply(that, args)) == null) return false; - dx = s.x - p[0] || 0; - dy = s.y - p[1] || 0; - return true; - })) return; - - return function gesture(type) { - var p0 = p, n; - switch (type) { - case "start": gestures[id] = gesture, n = active++; break; - case "end": delete gestures[id], --active; // nobreak - case "drag": p = point(container, id), n = active; break; - } - customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]); - }; - } - - drag.filter = function(_) { - return arguments.length ? (filter = typeof _ === "function" ? _ : constant$8(!!_), drag) : filter; - }; - - drag.container = function(_) { - return arguments.length ? (container = typeof _ === "function" ? _ : constant$8(_), drag) : container; + scale.domain = function(_) { + if (!arguments.length) return domain.slice(); + domain = [], index = map$1(); + var i = -1, n = _.length, d, key; + while (++i < n) if (!index.has(key = (d = _[i]) + "")) index.set(key, domain.push(d)); + return scale; }; - drag.subject = function(_) { - return arguments.length ? (subject = typeof _ === "function" ? _ : constant$8(_), drag) : subject; + scale.range = function(_) { + return arguments.length ? (range = slice$4.call(_), scale) : range.slice(); }; - drag.on = function() { - var value = listeners.on.apply(listeners, arguments); - return value === listeners ? drag : value; + scale.unknown = function(_) { + return arguments.length ? (unknown = _, scale) : unknown; }; - return drag; -}; - -var constant$9 = function(x) { - return function() { - return x; + scale.copy = function() { + return ordinal() + .domain(domain) + .range(range) + .unknown(unknown); }; -}; -function x$4(d) { - return d[0]; + return scale; } -function y$4(d) { - return d[1]; -} +function band() { + var scale = ordinal().unknown(undefined), + domain = scale.domain, + ordinalRange = scale.range, + range$$1 = [0, 1], + step, + bandwidth, + round = false, + paddingInner = 0, + paddingOuter = 0, + align = 0.5; -function RedBlackTree() { - this._ = null; // root node -} + delete scale.unknown; -function RedBlackNode(node) { - node.U = // parent node - node.C = // color - true for red, false for black - node.L = // left node - node.R = // right node - node.P = // previous node - node.N = null; // next node -} + function rescale() { + var n = domain().length, + reverse = range$$1[1] < range$$1[0], + start = range$$1[reverse - 0], + stop = range$$1[1 - reverse]; + step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2); + if (round) step = Math.floor(step); + start += (stop - start - step * (n - paddingInner)) * align; + bandwidth = step * (1 - paddingInner); + if (round) start = Math.round(start), bandwidth = Math.round(bandwidth); + var values = sequence(n).map(function(i) { return start + step * i; }); + return ordinalRange(reverse ? values.reverse() : values); + } -RedBlackTree.prototype = { - constructor: RedBlackTree, + scale.domain = function(_) { + return arguments.length ? (domain(_), rescale()) : domain(); + }; - insert: function(after, node) { - var parent, grandpa, uncle; + scale.range = function(_) { + return arguments.length ? (range$$1 = [+_[0], +_[1]], rescale()) : range$$1.slice(); + }; - if (after) { - node.P = after; - node.N = after.N; - if (after.N) after.N.P = node; - after.N = node; - if (after.R) { - after = after.R; - while (after.L) after = after.L; - after.L = node; - } else { - after.R = node; - } - parent = after; - } else if (this._) { - after = RedBlackFirst(this._); - node.P = null; - node.N = after; - after.P = after.L = node; - parent = after; - } else { - node.P = node.N = null; - this._ = node; - parent = null; - } - node.L = node.R = null; - node.U = parent; - node.C = true; + scale.rangeRound = function(_) { + return range$$1 = [+_[0], +_[1]], round = true, rescale(); + }; - after = node; - while (parent && parent.C) { - grandpa = parent.U; - if (parent === grandpa.L) { - uncle = grandpa.R; - if (uncle && uncle.C) { - parent.C = uncle.C = false; - grandpa.C = true; - after = grandpa; - } else { - if (after === parent.R) { - RedBlackRotateLeft(this, parent); - after = parent; - parent = after.U; - } - parent.C = false; - grandpa.C = true; - RedBlackRotateRight(this, grandpa); - } - } else { - uncle = grandpa.L; - if (uncle && uncle.C) { - parent.C = uncle.C = false; - grandpa.C = true; - after = grandpa; - } else { - if (after === parent.L) { - RedBlackRotateRight(this, parent); - after = parent; - parent = after.U; - } - parent.C = false; - grandpa.C = true; - RedBlackRotateLeft(this, grandpa); - } - } - parent = after.U; - } - this._.C = false; - }, + scale.bandwidth = function() { + return bandwidth; + }; - remove: function(node) { - if (node.N) node.N.P = node.P; - if (node.P) node.P.N = node.N; - node.N = node.P = null; + scale.step = function() { + return step; + }; - var parent = node.U, - sibling, - left = node.L, - right = node.R, - next, - red; + scale.round = function(_) { + return arguments.length ? (round = !!_, rescale()) : round; + }; - if (!left) next = right; - else if (!right) next = left; - else next = RedBlackFirst(right); + scale.padding = function(_) { + return arguments.length ? (paddingInner = paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingInner; + }; - if (parent) { - if (parent.L === node) parent.L = next; - else parent.R = next; - } else { - this._ = next; - } + scale.paddingInner = function(_) { + return arguments.length ? (paddingInner = Math.max(0, Math.min(1, _)), rescale()) : paddingInner; + }; - if (left && right) { - red = next.C; - next.C = node.C; - next.L = left; - left.U = next; - if (next !== right) { - parent = next.U; - next.U = node.U; - node = next.R; - parent.L = node; - next.R = right; - right.U = next; - } else { - next.U = parent; - parent = next; - node = next.R; - } - } else { - red = node.C; - node = next; - } + scale.paddingOuter = function(_) { + return arguments.length ? (paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingOuter; + }; - if (node) node.U = parent; - if (red) return; - if (node && node.C) { node.C = false; return; } + scale.align = function(_) { + return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align; + }; - do { - if (node === this._) break; - if (node === parent.L) { - sibling = parent.R; - if (sibling.C) { - sibling.C = false; - parent.C = true; - RedBlackRotateLeft(this, parent); - sibling = parent.R; - } - if ((sibling.L && sibling.L.C) - || (sibling.R && sibling.R.C)) { - if (!sibling.R || !sibling.R.C) { - sibling.L.C = false; - sibling.C = true; - RedBlackRotateRight(this, sibling); - sibling = parent.R; - } - sibling.C = parent.C; - parent.C = sibling.R.C = false; - RedBlackRotateLeft(this, parent); - node = this._; - break; - } - } else { - sibling = parent.L; - if (sibling.C) { - sibling.C = false; - parent.C = true; - RedBlackRotateRight(this, parent); - sibling = parent.L; - } - if ((sibling.L && sibling.L.C) - || (sibling.R && sibling.R.C)) { - if (!sibling.L || !sibling.L.C) { - sibling.R.C = false; - sibling.C = true; - RedBlackRotateLeft(this, sibling); - sibling = parent.L; - } - sibling.C = parent.C; - parent.C = sibling.L.C = false; - RedBlackRotateRight(this, parent); - node = this._; - break; - } - } - sibling.C = true; - node = parent; - parent = parent.U; - } while (!node.C); + scale.copy = function() { + return band() + .domain(domain()) + .range(range$$1) + .round(round) + .paddingInner(paddingInner) + .paddingOuter(paddingOuter) + .align(align); + }; - if (node) node.C = false; - } -}; + return rescale(); +} -function RedBlackRotateLeft(tree, node) { - var p = node, - q = node.R, - parent = p.U; +function pointish(scale) { + var copy = scale.copy; - if (parent) { - if (parent.L === p) parent.L = q; - else parent.R = q; - } else { - tree._ = q; - } + scale.padding = scale.paddingOuter; + delete scale.paddingInner; + delete scale.paddingOuter; - q.U = parent; - p.U = q; - p.R = q.L; - if (p.R) p.R.U = p; - q.L = p; + scale.copy = function() { + return pointish(copy()); + }; + + return scale; } -function RedBlackRotateRight(tree, node) { - var p = node, - q = node.L, - parent = p.U; +function point$1() { + return pointish(band().paddingInner(1)); +} - if (parent) { - if (parent.L === p) parent.L = q; - else parent.R = q; - } else { - tree._ = q; - } +var constant$9 = function(x) { + return function() { + return x; + }; +}; - q.U = parent; - p.U = q; - p.L = q.R; - if (p.L) p.L.U = p; - q.R = p; -} +var number$1 = function(x) { + return +x; +}; -function RedBlackFirst(node) { - while (node.L) node = node.L; - return node; +var unit = [0, 1]; + +function deinterpolateLinear(a, b) { + return (b -= (a = +a)) + ? function(x) { return (x - a) / b; } + : constant$9(b); } -function createEdge(left, right, v0, v1) { - var edge = [null, null], - index = edges.push(edge) - 1; - edge.left = left; - edge.right = right; - if (v0) setEdgeEnd(edge, left, right, v0); - if (v1) setEdgeEnd(edge, right, left, v1); - cells[left.index].halfedges.push(index); - cells[right.index].halfedges.push(index); - return edge; +function deinterpolateClamp(deinterpolate) { + return function(a, b) { + var d = deinterpolate(a = +a, b = +b); + return function(x) { return x <= a ? 0 : x >= b ? 1 : d(x); }; + }; } -function createBorderEdge(left, v0, v1) { - var edge = [v0, v1]; - edge.left = left; - return edge; +function reinterpolateClamp(reinterpolate) { + return function(a, b) { + var r = reinterpolate(a = +a, b = +b); + return function(t) { return t <= 0 ? a : t >= 1 ? b : r(t); }; + }; } -function setEdgeEnd(edge, left, right, vertex) { - if (!edge[0] && !edge[1]) { - edge[0] = vertex; - edge.left = left; - edge.right = right; - } else if (edge.left === right) { - edge[1] = vertex; - } else { - edge[0] = vertex; - } +function bimap(domain, range$$1, deinterpolate, reinterpolate) { + var d0 = domain[0], d1 = domain[1], r0 = range$$1[0], r1 = range$$1[1]; + if (d1 < d0) d0 = deinterpolate(d1, d0), r0 = reinterpolate(r1, r0); + else d0 = deinterpolate(d0, d1), r0 = reinterpolate(r0, r1); + return function(x) { return r0(d0(x)); }; } -// Liang–Barsky line clipping. -function clipEdge(edge, x0, y0, x1, y1) { - var a = edge[0], - b = edge[1], - ax = a[0], - ay = a[1], - bx = b[0], - by = b[1], - t0 = 0, - t1 = 1, - dx = bx - ax, - dy = by - ay, - r; +function polymap(domain, range$$1, deinterpolate, reinterpolate) { + var j = Math.min(domain.length, range$$1.length) - 1, + d = new Array(j), + r = new Array(j), + i = -1; - r = x0 - ax; - if (!dx && r > 0) return; - r /= dx; - if (dx < 0) { - if (r < t0) return; - if (r < t1) t1 = r; - } else if (dx > 0) { - if (r > t1) return; - if (r > t0) t0 = r; + // Reverse descending domains. + if (domain[j] < domain[0]) { + domain = domain.slice().reverse(); + range$$1 = range$$1.slice().reverse(); } - r = x1 - ax; - if (!dx && r < 0) return; - r /= dx; - if (dx < 0) { - if (r > t1) return; - if (r > t0) t0 = r; - } else if (dx > 0) { - if (r < t0) return; - if (r < t1) t1 = r; + while (++i < j) { + d[i] = deinterpolate(domain[i], domain[i + 1]); + r[i] = reinterpolate(range$$1[i], range$$1[i + 1]); } - r = y0 - ay; - if (!dy && r > 0) return; - r /= dy; - if (dy < 0) { - if (r < t0) return; - if (r < t1) t1 = r; - } else if (dy > 0) { - if (r > t1) return; - if (r > t0) t0 = r; + return function(x) { + var i = bisectRight(domain, x, 1, j) - 1; + return r[i](d[i](x)); + }; +} + +function copy(source, target) { + return target + .domain(source.domain()) + .range(source.range()) + .interpolate(source.interpolate()) + .clamp(source.clamp()); +} + +// deinterpolate(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1]. +// reinterpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding domain value x in [a,b]. +function continuous(deinterpolate, reinterpolate) { + var domain = unit, + range$$1 = unit, + interpolate$$1 = interpolateValue, + clamp = false, + piecewise, + output, + input; + + function rescale() { + piecewise = Math.min(domain.length, range$$1.length) > 2 ? polymap : bimap; + output = input = null; + return scale; } - r = y1 - ay; - if (!dy && r < 0) return; - r /= dy; - if (dy < 0) { - if (r > t1) return; - if (r > t0) t0 = r; - } else if (dy > 0) { - if (r < t0) return; - if (r < t1) t1 = r; + function scale(x) { + return (output || (output = piecewise(domain, range$$1, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x); } - if (!(t0 > 0) && !(t1 < 1)) return true; // TODO Better check? + scale.invert = function(y) { + return (input || (input = piecewise(range$$1, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y); + }; - if (t0 > 0) edge[0] = [ax + t0 * dx, ay + t0 * dy]; - if (t1 < 1) edge[1] = [ax + t1 * dx, ay + t1 * dy]; - return true; -} + scale.domain = function(_) { + return arguments.length ? (domain = map$3.call(_, number$1), rescale()) : domain.slice(); + }; -function connectEdge(edge, x0, y0, x1, y1) { - var v1 = edge[1]; - if (v1) return true; + scale.range = function(_) { + return arguments.length ? (range$$1 = slice$4.call(_), rescale()) : range$$1.slice(); + }; - var v0 = edge[0], - left = edge.left, - right = edge.right, - lx = left[0], - ly = left[1], - rx = right[0], - ry = right[1], - fx = (lx + rx) / 2, - fy = (ly + ry) / 2, - fm, - fb; + scale.rangeRound = function(_) { + return range$$1 = slice$4.call(_), interpolate$$1 = interpolateRound, rescale(); + }; - if (ry === ly) { - if (fx < x0 || fx >= x1) return; - if (lx > rx) { - if (!v0) v0 = [fx, y0]; - else if (v0[1] >= y1) return; - v1 = [fx, y1]; - } else { - if (!v0) v0 = [fx, y1]; - else if (v0[1] < y0) return; - v1 = [fx, y0]; + scale.clamp = function(_) { + return arguments.length ? (clamp = !!_, rescale()) : clamp; + }; + + scale.interpolate = function(_) { + return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1; + }; + + return rescale(); +} + +var tickFormat = function(domain, count, specifier) { + var start = domain[0], + stop = domain[domain.length - 1], + step = tickStep(start, stop, count == null ? 10 : count), + precision; + specifier = formatSpecifier(specifier == null ? ",f" : specifier); + switch (specifier.type) { + case "s": { + var value = Math.max(Math.abs(start), Math.abs(stop)); + if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision; + return exports.formatPrefix(specifier, value); } - } else { - fm = (lx - rx) / (ry - ly); - fb = fy - fm * fx; - if (fm < -1 || fm > 1) { - if (lx > rx) { - if (!v0) v0 = [(y0 - fb) / fm, y0]; - else if (v0[1] >= y1) return; - v1 = [(y1 - fb) / fm, y1]; - } else { - if (!v0) v0 = [(y1 - fb) / fm, y1]; - else if (v0[1] < y0) return; - v1 = [(y0 - fb) / fm, y0]; - } - } else { - if (ly < ry) { - if (!v0) v0 = [x0, fm * x0 + fb]; - else if (v0[0] >= x1) return; - v1 = [x1, fm * x1 + fb]; - } else { - if (!v0) v0 = [x1, fm * x1 + fb]; - else if (v0[0] < x0) return; - v1 = [x0, fm * x0 + fb]; - } + case "": + case "e": + case "g": + case "p": + case "r": { + if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e"); + break; + } + case "f": + case "%": { + if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2; + break; } } + return exports.format(specifier); +}; - edge[0] = v0; - edge[1] = v1; - return true; -} +function linearish(scale) { + var domain = scale.domain; -function clipEdges(x0, y0, x1, y1) { - var i = edges.length, - edge; + scale.ticks = function(count) { + var d = domain(); + return ticks(d[0], d[d.length - 1], count == null ? 10 : count); + }; - while (i--) { - if (!connectEdge(edge = edges[i], x0, y0, x1, y1) - || !clipEdge(edge, x0, y0, x1, y1) - || !(Math.abs(edge[0][0] - edge[1][0]) > epsilon$3 - || Math.abs(edge[0][1] - edge[1][1]) > epsilon$3)) { - delete edges[i]; + scale.tickFormat = function(count, specifier) { + return tickFormat(domain(), count, specifier); + }; + + scale.nice = function(count) { + var d = domain(), + i = d.length - 1, + n = count == null ? 10 : count, + start = d[0], + stop = d[i], + step = tickStep(start, stop, n); + + if (step) { + step = tickStep(Math.floor(start / step) * step, Math.ceil(stop / step) * step, n); + d[0] = Math.floor(start / step) * step; + d[i] = Math.ceil(stop / step) * step; + domain(d); } - } -} -function createCell(site) { - return cells[site.index] = { - site: site, - halfedges: [] + return scale; }; -} -function cellHalfedgeAngle(cell, edge) { - var site = cell.site, - va = edge.left, - vb = edge.right; - if (site === vb) vb = va, va = site; - if (vb) return Math.atan2(vb[1] - va[1], vb[0] - va[0]); - if (site === va) va = edge[1], vb = edge[0]; - else va = edge[0], vb = edge[1]; - return Math.atan2(va[0] - vb[0], vb[1] - va[1]); + return scale; } -function cellHalfedgeStart(cell, edge) { - return edge[+(edge.left !== cell.site)]; -} +function linear$2() { + var scale = continuous(deinterpolateLinear, reinterpolate); -function cellHalfedgeEnd(cell, edge) { - return edge[+(edge.left === cell.site)]; -} + scale.copy = function() { + return copy(scale, linear$2()); + }; -function sortCellHalfedges() { - for (var i = 0, n = cells.length, cell, halfedges, j, m; i < n; ++i) { - if ((cell = cells[i]) && (m = (halfedges = cell.halfedges).length)) { - var index = new Array(m), - array = new Array(m); - for (j = 0; j < m; ++j) index[j] = j, array[j] = cellHalfedgeAngle(cell, edges[halfedges[j]]); - index.sort(function(i, j) { return array[j] - array[i]; }); - for (j = 0; j < m; ++j) array[j] = halfedges[index[j]]; - for (j = 0; j < m; ++j) halfedges[j] = array[j]; - } - } + return linearish(scale); } -function clipCells(x0, y0, x1, y1) { - var nCells = cells.length, - iCell, - cell, - site, - iHalfedge, - halfedges, - nHalfedges, - start, - startX, - startY, - end, - endX, - endY, - cover = true; +function identity$6() { + var domain = [0, 1]; - for (iCell = 0; iCell < nCells; ++iCell) { - if (cell = cells[iCell]) { - site = cell.site; - halfedges = cell.halfedges; - iHalfedge = halfedges.length; + function scale(x) { + return +x; + } - // Remove any dangling clipped edges. - while (iHalfedge--) { - if (!edges[halfedges[iHalfedge]]) { - halfedges.splice(iHalfedge, 1); - } - } + scale.invert = scale; - // Insert any border edges as necessary. - iHalfedge = 0, nHalfedges = halfedges.length; - while (iHalfedge < nHalfedges) { - end = cellHalfedgeEnd(cell, edges[halfedges[iHalfedge]]), endX = end[0], endY = end[1]; - start = cellHalfedgeStart(cell, edges[halfedges[++iHalfedge % nHalfedges]]), startX = start[0], startY = start[1]; - if (Math.abs(endX - startX) > epsilon$3 || Math.abs(endY - startY) > epsilon$3) { - halfedges.splice(iHalfedge, 0, edges.push(createBorderEdge(site, end, - Math.abs(endX - x0) < epsilon$3 && y1 - endY > epsilon$3 ? [x0, Math.abs(startX - x0) < epsilon$3 ? startY : y1] - : Math.abs(endY - y1) < epsilon$3 && x1 - endX > epsilon$3 ? [Math.abs(startY - y1) < epsilon$3 ? startX : x1, y1] - : Math.abs(endX - x1) < epsilon$3 && endY - y0 > epsilon$3 ? [x1, Math.abs(startX - x1) < epsilon$3 ? startY : y0] - : Math.abs(endY - y0) < epsilon$3 && endX - x0 > epsilon$3 ? [Math.abs(startY - y0) < epsilon$3 ? startX : x0, y0] - : null)) - 1); - ++nHalfedges; - } - } + scale.domain = scale.range = function(_) { + return arguments.length ? (domain = map$3.call(_, number$1), scale) : domain.slice(); + }; - if (nHalfedges) cover = false; - } - } + scale.copy = function() { + return identity$6().domain(domain); + }; - // If there weren’t any edges, have the closest site cover the extent. - // It doesn’t matter which corner of the extent we measure! - if (cover) { - var dx, dy, d2, dc = Infinity; + return linearish(scale); +} - for (iCell = 0, cover = null; iCell < nCells; ++iCell) { - if (cell = cells[iCell]) { - site = cell.site; - dx = site[0] - x0; - dy = site[1] - y0; - d2 = dx * dx + dy * dy; - if (d2 < dc) dc = d2, cover = cell; - } - } +var nice = function(domain, interval) { + domain = domain.slice(); - if (cover) { - var v00 = [x0, y0], v01 = [x0, y1], v11 = [x1, y1], v10 = [x1, y0]; - cover.halfedges.push( - edges.push(createBorderEdge(site = cover.site, v00, v01)) - 1, - edges.push(createBorderEdge(site, v01, v11)) - 1, - edges.push(createBorderEdge(site, v11, v10)) - 1, - edges.push(createBorderEdge(site, v10, v00)) - 1 - ); - } - } + var i0 = 0, + i1 = domain.length - 1, + x0 = domain[i0], + x1 = domain[i1], + t; - // Lastly delete any cells with no edges; these were entirely clipped. - for (iCell = 0; iCell < nCells; ++iCell) { - if (cell = cells[iCell]) { - if (!cell.halfedges.length) { - delete cells[iCell]; - } - } + if (x1 < x0) { + t = i0, i0 = i1, i1 = t; + t = x0, x0 = x1, x1 = t; } -} -var circlePool = []; + domain[i0] = interval.floor(x0); + domain[i1] = interval.ceil(x1); + return domain; +}; -var firstCircle; +function deinterpolate(a, b) { + return (b = Math.log(b / a)) + ? function(x) { return Math.log(x / a) / b; } + : constant$9(b); +} -function Circle() { - RedBlackNode(this); - this.x = - this.y = - this.arc = - this.site = - this.cy = null; +function reinterpolate$1(a, b) { + return a < 0 + ? function(t) { return -Math.pow(-b, t) * Math.pow(-a, 1 - t); } + : function(t) { return Math.pow(b, t) * Math.pow(a, 1 - t); }; } -function attachCircle(arc) { - var lArc = arc.P, - rArc = arc.N; +function pow10(x) { + return isFinite(x) ? +("1e" + x) : x < 0 ? 0 : x; +} - if (!lArc || !rArc) return; +function powp(base) { + return base === 10 ? pow10 + : base === Math.E ? Math.exp + : function(x) { return Math.pow(base, x); }; +} - var lSite = lArc.site, - cSite = arc.site, - rSite = rArc.site; +function logp(base) { + return base === Math.E ? Math.log + : base === 10 && Math.log10 + || base === 2 && Math.log2 + || (base = Math.log(base), function(x) { return Math.log(x) / base; }); +} - if (lSite === rSite) return; +function reflect(f) { + return function(x) { + return -f(-x); + }; +} + +function log$1() { + var scale = continuous(deinterpolate, reinterpolate$1).domain([1, 10]), + domain = scale.domain, + base = 10, + logs = logp(10), + pows = powp(10); - var bx = cSite[0], - by = cSite[1], - ax = lSite[0] - bx, - ay = lSite[1] - by, - cx = rSite[0] - bx, - cy = rSite[1] - by; + function rescale() { + logs = logp(base), pows = powp(base); + if (domain()[0] < 0) logs = reflect(logs), pows = reflect(pows); + return scale; + } - var d = 2 * (ax * cy - ay * cx); - if (d >= -epsilon2$1) return; + scale.base = function(_) { + return arguments.length ? (base = +_, rescale()) : base; + }; - var ha = ax * ax + ay * ay, - hc = cx * cx + cy * cy, - x = (cy * ha - ay * hc) / d, - y = (ax * hc - cx * ha) / d; + scale.domain = function(_) { + return arguments.length ? (domain(_), rescale()) : domain(); + }; - var circle = circlePool.pop() || new Circle; - circle.arc = arc; - circle.site = cSite; - circle.x = x + bx; - circle.y = (circle.cy = y + by) + Math.sqrt(x * x + y * y); // y bottom + scale.ticks = function(count) { + var d = domain(), + u = d[0], + v = d[d.length - 1], + r; - arc.circle = circle; + if (r = v < u) i = u, u = v, v = i; - var before = null, - node = circles._; + var i = logs(u), + j = logs(v), + p, + k, + t, + n = count == null ? 10 : +count, + z = []; - while (node) { - if (circle.y < node.y || (circle.y === node.y && circle.x <= node.x)) { - if (node.L) node = node.L; - else { before = node.P; break; } + if (!(base % 1) && j - i < n) { + i = Math.round(i) - 1, j = Math.round(j) + 1; + if (u > 0) for (; i < j; ++i) { + for (k = 1, p = pows(i); k < base; ++k) { + t = p * k; + if (t < u) continue; + if (t > v) break; + z.push(t); + } + } else for (; i < j; ++i) { + for (k = base - 1, p = pows(i); k >= 1; --k) { + t = p * k; + if (t < u) continue; + if (t > v) break; + z.push(t); + } + } } else { - if (node.R) node = node.R; - else { before = node; break; } + z = ticks(i, j, Math.min(j - i, n)).map(pows); } - } - circles.insert(before, circle); - if (!before) firstCircle = circle; -} + return r ? z.reverse() : z; + }; -function detachCircle(arc) { - var circle = arc.circle; - if (circle) { - if (!circle.P) firstCircle = circle.N; - circles.remove(circle); - circlePool.push(circle); - RedBlackNode(circle); - arc.circle = null; - } -} + scale.tickFormat = function(count, specifier) { + if (specifier == null) specifier = base === 10 ? ".0e" : ","; + if (typeof specifier !== "function") specifier = exports.format(specifier); + if (count === Infinity) return specifier; + if (count == null) count = 10; + var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate? + return function(d) { + var i = d / pows(Math.round(logs(d))); + if (i * base < base - 0.5) i *= base; + return i <= k ? specifier(d) : ""; + }; + }; -var beachPool = []; + scale.nice = function() { + return domain(nice(domain(), { + floor: function(x) { return pows(Math.floor(logs(x))); }, + ceil: function(x) { return pows(Math.ceil(logs(x))); } + })); + }; -function Beach() { - RedBlackNode(this); - this.edge = - this.site = - this.circle = null; -} + scale.copy = function() { + return copy(scale, log$1().base(base)); + }; -function createBeach(site) { - var beach = beachPool.pop() || new Beach; - beach.site = site; - return beach; + return scale; } -function detachBeach(beach) { - detachCircle(beach); - beaches.remove(beach); - beachPool.push(beach); - RedBlackNode(beach); +function raise$1(x, exponent) { + return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent); } -function removeBeach(beach) { - var circle = beach.circle, - x = circle.x, - y = circle.cy, - vertex = [x, y], - previous = beach.P, - next = beach.N, - disappearing = [beach]; - - detachBeach(beach); +function pow$1() { + var exponent = 1, + scale = continuous(deinterpolate, reinterpolate), + domain = scale.domain; - var lArc = previous; - while (lArc.circle - && Math.abs(x - lArc.circle.x) < epsilon$3 - && Math.abs(y - lArc.circle.cy) < epsilon$3) { - previous = lArc.P; - disappearing.unshift(lArc); - detachBeach(lArc); - lArc = previous; + function deinterpolate(a, b) { + return (b = raise$1(b, exponent) - (a = raise$1(a, exponent))) + ? function(x) { return (raise$1(x, exponent) - a) / b; } + : constant$9(b); } - disappearing.unshift(lArc); - detachCircle(lArc); - - var rArc = next; - while (rArc.circle - && Math.abs(x - rArc.circle.x) < epsilon$3 - && Math.abs(y - rArc.circle.cy) < epsilon$3) { - next = rArc.N; - disappearing.push(rArc); - detachBeach(rArc); - rArc = next; + function reinterpolate(a, b) { + b = raise$1(b, exponent) - (a = raise$1(a, exponent)); + return function(t) { return raise$1(a + b * t, 1 / exponent); }; } - disappearing.push(rArc); - detachCircle(rArc); + scale.exponent = function(_) { + return arguments.length ? (exponent = +_, domain(domain())) : exponent; + }; - var nArcs = disappearing.length, - iArc; - for (iArc = 1; iArc < nArcs; ++iArc) { - rArc = disappearing[iArc]; - lArc = disappearing[iArc - 1]; - setEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex); - } + scale.copy = function() { + return copy(scale, pow$1().exponent(exponent)); + }; - lArc = disappearing[0]; - rArc = disappearing[nArcs - 1]; - rArc.edge = createEdge(lArc.site, rArc.site, null, vertex); + return linearish(scale); +} - attachCircle(lArc); - attachCircle(rArc); +function sqrt$1() { + return pow$1().exponent(0.5); } -function addBeach(site) { - var x = site[0], - directrix = site[1], - lArc, - rArc, - dxl, - dxr, - node = beaches._; +function quantile$$1() { + var domain = [], + range$$1 = [], + thresholds = []; - while (node) { - dxl = leftBreakPoint(node, directrix) - x; - if (dxl > epsilon$3) node = node.L; else { - dxr = x - rightBreakPoint(node, directrix); - if (dxr > epsilon$3) { - if (!node.R) { - lArc = node; - break; - } - node = node.R; - } else { - if (dxl > -epsilon$3) { - lArc = node.P; - rArc = node; - } else if (dxr > -epsilon$3) { - lArc = node; - rArc = node.N; - } else { - lArc = rArc = node; - } - break; - } - } + function rescale() { + var i = 0, n = Math.max(1, range$$1.length); + thresholds = new Array(n - 1); + while (++i < n) thresholds[i - 1] = threshold(domain, i / n); + return scale; } - createCell(site); - var newArc = createBeach(site); - beaches.insert(lArc, newArc); + function scale(x) { + if (!isNaN(x = +x)) return range$$1[bisectRight(thresholds, x)]; + } - if (!lArc && !rArc) return; + scale.invertExtent = function(y) { + var i = range$$1.indexOf(y); + return i < 0 ? [NaN, NaN] : [ + i > 0 ? thresholds[i - 1] : domain[0], + i < thresholds.length ? thresholds[i] : domain[domain.length - 1] + ]; + }; - if (lArc === rArc) { - detachCircle(lArc); - rArc = createBeach(lArc.site); - beaches.insert(newArc, rArc); - newArc.edge = rArc.edge = createEdge(lArc.site, newArc.site); - attachCircle(lArc); - attachCircle(rArc); - return; + scale.domain = function(_) { + if (!arguments.length) return domain.slice(); + domain = []; + for (var i = 0, n = _.length, d; i < n; ++i) if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d); + domain.sort(ascending); + return rescale(); + }; + + scale.range = function(_) { + return arguments.length ? (range$$1 = slice$4.call(_), rescale()) : range$$1.slice(); + }; + + scale.quantiles = function() { + return thresholds.slice(); + }; + + scale.copy = function() { + return quantile$$1() + .domain(domain) + .range(range$$1); + }; + + return scale; +} + +function quantize$1() { + var x0 = 0, + x1 = 1, + n = 1, + domain = [0.5], + range$$1 = [0, 1]; + + function scale(x) { + if (x <= x) return range$$1[bisectRight(domain, x, 0, n)]; } - if (!rArc) { // && lArc - newArc.edge = createEdge(lArc.site, newArc.site); - return; + function rescale() { + var i = -1; + domain = new Array(n); + while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1); + return scale; } - // else lArc !== rArc - detachCircle(lArc); - detachCircle(rArc); + scale.domain = function(_) { + return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1]; + }; - var lSite = lArc.site, - ax = lSite[0], - ay = lSite[1], - bx = site[0] - ax, - by = site[1] - ay, - rSite = rArc.site, - cx = rSite[0] - ax, - cy = rSite[1] - ay, - d = 2 * (bx * cy - by * cx), - hb = bx * bx + by * by, - hc = cx * cx + cy * cy, - vertex = [(cy * hb - by * hc) / d + ax, (bx * hc - cx * hb) / d + ay]; + scale.range = function(_) { + return arguments.length ? (n = (range$$1 = slice$4.call(_)).length - 1, rescale()) : range$$1.slice(); + }; - setEdgeEnd(rArc.edge, lSite, rSite, vertex); - newArc.edge = createEdge(lSite, site, null, vertex); - rArc.edge = createEdge(site, rSite, null, vertex); - attachCircle(lArc); - attachCircle(rArc); -} + scale.invertExtent = function(y) { + var i = range$$1.indexOf(y); + return i < 0 ? [NaN, NaN] + : i < 1 ? [x0, domain[0]] + : i >= n ? [domain[n - 1], x1] + : [domain[i - 1], domain[i]]; + }; -function leftBreakPoint(arc, directrix) { - var site = arc.site, - rfocx = site[0], - rfocy = site[1], - pby2 = rfocy - directrix; + scale.copy = function() { + return quantize$1() + .domain([x0, x1]) + .range(range$$1); + }; - if (!pby2) return rfocx; + return linearish(scale); +} - var lArc = arc.P; - if (!lArc) return -Infinity; +function threshold$1() { + var domain = [0.5], + range$$1 = [0, 1], + n = 1; - site = lArc.site; - var lfocx = site[0], - lfocy = site[1], - plby2 = lfocy - directrix; + function scale(x) { + if (x <= x) return range$$1[bisectRight(domain, x, 0, n)]; + } - if (!plby2) return lfocx; + scale.domain = function(_) { + return arguments.length ? (domain = slice$4.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : domain.slice(); + }; - var hl = lfocx - rfocx, - aby2 = 1 / pby2 - 1 / plby2, - b = hl / plby2; + scale.range = function(_) { + return arguments.length ? (range$$1 = slice$4.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : range$$1.slice(); + }; - if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx; + scale.invertExtent = function(y) { + var i = range$$1.indexOf(y); + return [domain[i - 1], domain[i]]; + }; - return (rfocx + lfocx) / 2; -} + scale.copy = function() { + return threshold$1() + .domain(domain) + .range(range$$1); + }; -function rightBreakPoint(arc, directrix) { - var rArc = arc.N; - if (rArc) return leftBreakPoint(rArc, directrix); - var site = arc.site; - return site[1] === directrix ? site[0] : Infinity; + return scale; } -var epsilon$3 = 1e-6; -var epsilon2$1 = 1e-12; -var beaches; -var cells; -var circles; -var edges; +var t0$1 = new Date; +var t1$1 = new Date; -function triangleArea(a, b, c) { - return (a[0] - c[0]) * (b[1] - a[1]) - (a[0] - b[0]) * (c[1] - a[1]); -} +function newInterval(floori, offseti, count, field) { -function lexicographic(a, b) { - return b[1] - a[1] - || b[0] - a[0]; -} + function interval(date) { + return floori(date = new Date(+date)), date; + } -function Diagram(sites, extent) { - var site = sites.sort(lexicographic).pop(), - x, - y, - circle; + interval.floor = interval; - edges = []; - cells = new Array(sites.length); - beaches = new RedBlackTree; - circles = new RedBlackTree; + interval.ceil = function(date) { + return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date; + }; - while (true) { - circle = firstCircle; - if (site && (!circle || site[1] < circle.y || (site[1] === circle.y && site[0] < circle.x))) { - if (site[0] !== x || site[1] !== y) { - addBeach(site); - x = site[0], y = site[1]; - } - site = sites.pop(); - } else if (circle) { - removeBeach(circle.arc); - } else { - break; - } - } + interval.round = function(date) { + var d0 = interval(date), + d1 = interval.ceil(date); + return date - d0 < d1 - date ? d0 : d1; + }; - sortCellHalfedges(); + interval.offset = function(date, step) { + return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date; + }; - if (extent) { - var x0 = +extent[0][0], - y0 = +extent[0][1], - x1 = +extent[1][0], - y1 = +extent[1][1]; - clipEdges(x0, y0, x1, y1); - clipCells(x0, y0, x1, y1); - } + interval.range = function(start, stop, step) { + var range = []; + start = interval.ceil(start); + step = step == null ? 1 : Math.floor(step); + if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date + do range.push(new Date(+start)); while (offseti(start, step), floori(start), start < stop) + return range; + }; - this.edges = edges; - this.cells = cells; + interval.filter = function(test) { + return newInterval(function(date) { + if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1); + }, function(date, step) { + if (date >= date) while (--step >= 0) while (offseti(date, 1), !test(date)) {} // eslint-disable-line no-empty + }); + }; - beaches = - circles = - edges = - cells = null; + if (count) { + interval.count = function(start, end) { + t0$1.setTime(+start), t1$1.setTime(+end); + floori(t0$1), floori(t1$1); + return Math.floor(count(t0$1, t1$1)); + }; + + interval.every = function(step) { + step = Math.floor(step); + return !isFinite(step) || !(step > 0) ? null + : !(step > 1) ? interval + : interval.filter(field + ? function(d) { return field(d) % step === 0; } + : function(d) { return interval.count(0, d) % step === 0; }); + }; + } + + return interval; } -Diagram.prototype = { - constructor: Diagram, +var millisecond = newInterval(function() { + // noop +}, function(date, step) { + date.setTime(+date + step); +}, function(start, end) { + return end - start; +}); - polygons: function() { - var edges = this.edges; +// An optimized implementation for this simple case. +millisecond.every = function(k) { + k = Math.floor(k); + if (!isFinite(k) || !(k > 0)) return null; + if (!(k > 1)) return millisecond; + return newInterval(function(date) { + date.setTime(Math.floor(date / k) * k); + }, function(date, step) { + date.setTime(+date + step * k); + }, function(start, end) { + return (end - start) / k; + }); +}; - return this.cells.map(function(cell) { - var polygon = cell.halfedges.map(function(i) { return cellHalfedgeStart(cell, edges[i]); }); - polygon.data = cell.site.data; - return polygon; - }); - }, +var milliseconds = millisecond.range; - triangles: function() { - var triangles = [], - edges = this.edges; +var durationSecond$1 = 1e3; +var durationMinute$1 = 6e4; +var durationHour$1 = 36e5; +var durationDay$1 = 864e5; +var durationWeek$1 = 6048e5; - this.cells.forEach(function(cell, i) { - var site = cell.site, - halfedges = cell.halfedges, - j = -1, - m = halfedges.length, - s0, - e1 = edges[halfedges[m - 1]], - s1 = e1.left === site ? e1.right : e1.left; +var second = newInterval(function(date) { + date.setTime(Math.floor(date / durationSecond$1) * durationSecond$1); +}, function(date, step) { + date.setTime(+date + step * durationSecond$1); +}, function(start, end) { + return (end - start) / durationSecond$1; +}, function(date) { + return date.getUTCSeconds(); +}); + +var seconds = second.range; + +var minute = newInterval(function(date) { + date.setTime(Math.floor(date / durationMinute$1) * durationMinute$1); +}, function(date, step) { + date.setTime(+date + step * durationMinute$1); +}, function(start, end) { + return (end - start) / durationMinute$1; +}, function(date) { + return date.getMinutes(); +}); - while (++j < m) { - s0 = s1; - e1 = edges[halfedges[j]]; - s1 = e1.left === site ? e1.right : e1.left; - if (s0 && s1 && i < s0.index && i < s1.index && triangleArea(site, s0, s1) < 0) { - triangles.push([site.data, s0.data, s1.data]); - } - } - }); +var minutes = minute.range; - return triangles; - }, +var hour = newInterval(function(date) { + var offset = date.getTimezoneOffset() * durationMinute$1 % durationHour$1; + if (offset < 0) offset += durationHour$1; + date.setTime(Math.floor((+date - offset) / durationHour$1) * durationHour$1 + offset); +}, function(date, step) { + date.setTime(+date + step * durationHour$1); +}, function(start, end) { + return (end - start) / durationHour$1; +}, function(date) { + return date.getHours(); +}); - links: function() { - return this.edges.filter(function(edge) { - return edge.right; - }).map(function(edge) { - return { - source: edge.left.data, - target: edge.right.data - }; - }); - }, +var hours = hour.range; - find: function(x, y, radius) { - var that = this, - i0, i1 = that._found || 0, - cell = that.cells[i1] || that.cells[i1 = 0], - dx = x - cell.site[0], - dy = y - cell.site[1], - d2 = dx * dx + dy * dy; +var day = newInterval(function(date) { + date.setHours(0, 0, 0, 0); +}, function(date, step) { + date.setDate(date.getDate() + step); +}, function(start, end) { + return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationDay$1; +}, function(date) { + return date.getDate() - 1; +}); - do { - cell = that.cells[i0 = i1], i1 = null; - cell.halfedges.forEach(function(e) { - var edge = that.edges[e], v = edge.left; - if ((v === cell.site || !v) && !(v = edge.right)) return; - var vx = x - v[0], - vy = y - v[1], - v2 = vx * vx + vy * vy; - if (v2 < d2) d2 = v2, i1 = v.index; - }); - } while (i1 !== null); +var days = day.range; - that._found = i0; +function weekday(i) { + return newInterval(function(date) { + date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7); + date.setHours(0, 0, 0, 0); + }, function(date, step) { + date.setDate(date.getDate() + step * 7); + }, function(start, end) { + return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationWeek$1; + }); +} - return radius == null || d2 <= radius * radius ? cell.site : null; - } -}; +var sunday = weekday(0); +var monday = weekday(1); +var tuesday = weekday(2); +var wednesday = weekday(3); +var thursday = weekday(4); +var friday = weekday(5); +var saturday = weekday(6); -var voronoi = function() { - var x$$1 = x$4, - y$$1 = y$4, - extent = null; +var sundays = sunday.range; +var mondays = monday.range; +var tuesdays = tuesday.range; +var wednesdays = wednesday.range; +var thursdays = thursday.range; +var fridays = friday.range; +var saturdays = saturday.range; - function voronoi(data) { - return new Diagram(data.map(function(d, i) { - var s = [Math.round(x$$1(d, i, data) / epsilon$3) * epsilon$3, Math.round(y$$1(d, i, data) / epsilon$3) * epsilon$3]; - s.index = i; - s.data = d; - return s; - }), extent); - } +var month = newInterval(function(date) { + date.setDate(1); + date.setHours(0, 0, 0, 0); +}, function(date, step) { + date.setMonth(date.getMonth() + step); +}, function(start, end) { + return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12; +}, function(date) { + return date.getMonth(); +}); - voronoi.polygons = function(data) { - return voronoi(data).polygons(); - }; +var months = month.range; - voronoi.links = function(data) { - return voronoi(data).links(); - }; +var year = newInterval(function(date) { + date.setMonth(0, 1); + date.setHours(0, 0, 0, 0); +}, function(date, step) { + date.setFullYear(date.getFullYear() + step); +}, function(start, end) { + return end.getFullYear() - start.getFullYear(); +}, function(date) { + return date.getFullYear(); +}); - voronoi.triangles = function(data) { - return voronoi(data).triangles(); - }; +// An optimized implementation for this simple case. +year.every = function(k) { + return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) { + date.setFullYear(Math.floor(date.getFullYear() / k) * k); + date.setMonth(0, 1); + date.setHours(0, 0, 0, 0); + }, function(date, step) { + date.setFullYear(date.getFullYear() + step * k); + }); +}; - voronoi.x = function(_) { - return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$9(+_), voronoi) : x$$1; - }; +var years = year.range; - voronoi.y = function(_) { - return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$9(+_), voronoi) : y$$1; - }; +var utcMinute = newInterval(function(date) { + date.setUTCSeconds(0, 0); +}, function(date, step) { + date.setTime(+date + step * durationMinute$1); +}, function(start, end) { + return (end - start) / durationMinute$1; +}, function(date) { + return date.getUTCMinutes(); +}); - voronoi.extent = function(_) { - return arguments.length ? (extent = _ == null ? null : [[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]], voronoi) : extent && [[extent[0][0], extent[0][1]], [extent[1][0], extent[1][1]]]; - }; +var utcMinutes = utcMinute.range; - voronoi.size = function(_) { - return arguments.length ? (extent = _ == null ? null : [[0, 0], [+_[0], +_[1]]], voronoi) : extent && [extent[1][0] - extent[0][0], extent[1][1] - extent[0][1]]; - }; +var utcHour = newInterval(function(date) { + date.setUTCMinutes(0, 0, 0); +}, function(date, step) { + date.setTime(+date + step * durationHour$1); +}, function(start, end) { + return (end - start) / durationHour$1; +}, function(date) { + return date.getUTCHours(); +}); - return voronoi; -}; +var utcHours = utcHour.range; -var constant$10 = function(x) { - return function() { - return x; - }; -}; +var utcDay = newInterval(function(date) { + date.setUTCHours(0, 0, 0, 0); +}, function(date, step) { + date.setUTCDate(date.getUTCDate() + step); +}, function(start, end) { + return (end - start) / durationDay$1; +}, function(date) { + return date.getUTCDate() - 1; +}); -function ZoomEvent(target, type, transform) { - this.target = target; - this.type = type; - this.transform = transform; -} +var utcDays = utcDay.range; -function Transform(k, x, y) { - this.k = k; - this.x = x; - this.y = y; +function utcWeekday(i) { + return newInterval(function(date) { + date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7); + date.setUTCHours(0, 0, 0, 0); + }, function(date, step) { + date.setUTCDate(date.getUTCDate() + step * 7); + }, function(start, end) { + return (end - start) / durationWeek$1; + }); } -Transform.prototype = { - constructor: Transform, - scale: function(k) { - return k === 1 ? this : new Transform(this.k * k, this.x, this.y); - }, - translate: function(x, y) { - return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y); - }, - apply: function(point) { - return [point[0] * this.k + this.x, point[1] * this.k + this.y]; - }, - applyX: function(x) { - return x * this.k + this.x; - }, - applyY: function(y) { - return y * this.k + this.y; - }, - invert: function(location) { - return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k]; - }, - invertX: function(x) { - return (x - this.x) / this.k; - }, - invertY: function(y) { - return (y - this.y) / this.k; - }, - rescaleX: function(x) { - return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x)); - }, - rescaleY: function(y) { - return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y)); - }, - toString: function() { - return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")"; - } -}; +var utcSunday = utcWeekday(0); +var utcMonday = utcWeekday(1); +var utcTuesday = utcWeekday(2); +var utcWednesday = utcWeekday(3); +var utcThursday = utcWeekday(4); +var utcFriday = utcWeekday(5); +var utcSaturday = utcWeekday(6); -var identity$6 = new Transform(1, 0, 0); +var utcSundays = utcSunday.range; +var utcMondays = utcMonday.range; +var utcTuesdays = utcTuesday.range; +var utcWednesdays = utcWednesday.range; +var utcThursdays = utcThursday.range; +var utcFridays = utcFriday.range; +var utcSaturdays = utcSaturday.range; -transform.prototype = Transform.prototype; +var utcMonth = newInterval(function(date) { + date.setUTCDate(1); + date.setUTCHours(0, 0, 0, 0); +}, function(date, step) { + date.setUTCMonth(date.getUTCMonth() + step); +}, function(start, end) { + return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12; +}, function(date) { + return date.getUTCMonth(); +}); -function transform(node) { - return node.__zoom || identity$6; -} +var utcMonths = utcMonth.range; -function nopropagation$1() { - exports.event.stopImmediatePropagation(); -} +var utcYear = newInterval(function(date) { + date.setUTCMonth(0, 1); + date.setUTCHours(0, 0, 0, 0); +}, function(date, step) { + date.setUTCFullYear(date.getUTCFullYear() + step); +}, function(start, end) { + return end.getUTCFullYear() - start.getUTCFullYear(); +}, function(date) { + return date.getUTCFullYear(); +}); -var noevent$1 = function() { - exports.event.preventDefault(); - exports.event.stopImmediatePropagation(); +// An optimized implementation for this simple case. +utcYear.every = function(k) { + return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) { + date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k); + date.setUTCMonth(0, 1); + date.setUTCHours(0, 0, 0, 0); + }, function(date, step) { + date.setUTCFullYear(date.getUTCFullYear() + step * k); + }); }; -// Ignore right-click, since that should open the context menu. -function defaultFilter$1() { - return !exports.event.button; -} +var utcYears = utcYear.range; -function defaultExtent() { - var e = this, w, h; - if (e instanceof SVGElement) { - e = e.ownerSVGElement || e; - w = e.width.baseVal.value; - h = e.height.baseVal.value; - } else { - w = e.clientWidth; - h = e.clientHeight; +function localDate(d) { + if (0 <= d.y && d.y < 100) { + var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L); + date.setFullYear(d.y); + return date; } - return [[0, 0], [w, h]]; + return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L); } -function defaultTransform() { - return this.__zoom || identity$6; +function utcDate(d) { + if (0 <= d.y && d.y < 100) { + var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L)); + date.setUTCFullYear(d.y); + return date; + } + return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L)); } -var zoom = function() { - var filter = defaultFilter$1, - extent = defaultExtent, - k0 = 0, - k1 = Infinity, - x0 = -k1, - x1 = k1, - y0 = x0, - y1 = x1, - duration = 250, - interpolate$$1 = interpolateZoom, - gestures = [], - listeners = dispatch("start", "zoom", "end"), - touchstarting, - touchending, - touchDelay = 500, - wheelDelay = 150; +function newYear(y) { + return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0}; +} - function zoom(selection$$1) { - selection$$1 - .on("wheel.zoom", wheeled) - .on("mousedown.zoom", mousedowned) - .on("dblclick.zoom", dblclicked) - .on("touchstart.zoom", touchstarted) - .on("touchmove.zoom", touchmoved) - .on("touchend.zoom touchcancel.zoom", touchended) - .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)") - .property("__zoom", defaultTransform); - } +function formatLocale$1(locale) { + var locale_dateTime = locale.dateTime, + locale_date = locale.date, + locale_time = locale.time, + locale_periods = locale.periods, + locale_weekdays = locale.days, + locale_shortWeekdays = locale.shortDays, + locale_months = locale.months, + locale_shortMonths = locale.shortMonths; - zoom.transform = function(collection, transform) { - var selection$$1 = collection.selection ? collection.selection() : collection; - selection$$1.property("__zoom", defaultTransform); - if (collection !== selection$$1) { - schedule(collection, transform); - } else { - selection$$1.interrupt().each(function() { - gesture(this, arguments) - .start() - .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform) - .end(); - }); - } - }; + var periodRe = formatRe(locale_periods), + periodLookup = formatLookup(locale_periods), + weekdayRe = formatRe(locale_weekdays), + weekdayLookup = formatLookup(locale_weekdays), + shortWeekdayRe = formatRe(locale_shortWeekdays), + shortWeekdayLookup = formatLookup(locale_shortWeekdays), + monthRe = formatRe(locale_months), + monthLookup = formatLookup(locale_months), + shortMonthRe = formatRe(locale_shortMonths), + shortMonthLookup = formatLookup(locale_shortMonths); - zoom.scaleBy = function(selection$$1, k) { - zoom.scaleTo(selection$$1, function() { - var k0 = this.__zoom.k, - k1 = typeof k === "function" ? k.apply(this, arguments) : k; - return k0 * k1; - }); + var formats = { + "a": formatShortWeekday, + "A": formatWeekday, + "b": formatShortMonth, + "B": formatMonth, + "c": null, + "d": formatDayOfMonth, + "e": formatDayOfMonth, + "H": formatHour24, + "I": formatHour12, + "j": formatDayOfYear, + "L": formatMilliseconds, + "m": formatMonthNumber, + "M": formatMinutes, + "p": formatPeriod, + "S": formatSeconds, + "U": formatWeekNumberSunday, + "w": formatWeekdayNumber, + "W": formatWeekNumberMonday, + "x": null, + "X": null, + "y": formatYear, + "Y": formatFullYear, + "Z": formatZone, + "%": formatLiteralPercent }; - zoom.scaleTo = function(selection$$1, k) { - zoom.transform(selection$$1, function() { - var e = extent.apply(this, arguments), - t0 = this.__zoom, - p0 = centroid(e), - p1 = t0.invert(p0), - k1 = typeof k === "function" ? k.apply(this, arguments) : k; - return constrain(translate(scale(t0, k1), p0, p1), e); - }); + var utcFormats = { + "a": formatUTCShortWeekday, + "A": formatUTCWeekday, + "b": formatUTCShortMonth, + "B": formatUTCMonth, + "c": null, + "d": formatUTCDayOfMonth, + "e": formatUTCDayOfMonth, + "H": formatUTCHour24, + "I": formatUTCHour12, + "j": formatUTCDayOfYear, + "L": formatUTCMilliseconds, + "m": formatUTCMonthNumber, + "M": formatUTCMinutes, + "p": formatUTCPeriod, + "S": formatUTCSeconds, + "U": formatUTCWeekNumberSunday, + "w": formatUTCWeekdayNumber, + "W": formatUTCWeekNumberMonday, + "x": null, + "X": null, + "y": formatUTCYear, + "Y": formatUTCFullYear, + "Z": formatUTCZone, + "%": formatLiteralPercent }; - zoom.translateBy = function(selection$$1, x, y) { - zoom.transform(selection$$1, function() { - return constrain(this.__zoom.translate( - typeof x === "function" ? x.apply(this, arguments) : x, - typeof y === "function" ? y.apply(this, arguments) : y - ), extent.apply(this, arguments)); - }); + var parses = { + "a": parseShortWeekday, + "A": parseWeekday, + "b": parseShortMonth, + "B": parseMonth, + "c": parseLocaleDateTime, + "d": parseDayOfMonth, + "e": parseDayOfMonth, + "H": parseHour24, + "I": parseHour24, + "j": parseDayOfYear, + "L": parseMilliseconds, + "m": parseMonthNumber, + "M": parseMinutes, + "p": parsePeriod, + "S": parseSeconds, + "U": parseWeekNumberSunday, + "w": parseWeekdayNumber, + "W": parseWeekNumberMonday, + "x": parseLocaleDate, + "X": parseLocaleTime, + "y": parseYear, + "Y": parseFullYear, + "Z": parseZone, + "%": parseLiteralPercent }; - function scale(transform, k) { - k = Math.max(k0, Math.min(k1, k)); - return k === transform.k ? transform : new Transform(k, transform.x, transform.y); - } - - function translate(transform, p0, p1) { - var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k; - return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y); - } - - function constrain(transform, extent) { - var dx0 = transform.invertX(extent[0][0]) - x0, - dx1 = transform.invertX(extent[1][0]) - x1, - dy0 = transform.invertY(extent[0][1]) - y0, - dy1 = transform.invertY(extent[1][1]) - y1; - return transform.translate( - dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), - dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1) - ); - } - - function centroid(extent) { - return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2]; - } - - function schedule(transition$$1, transform, center) { - transition$$1 - .on("start.zoom", function() { gesture(this, arguments).start(); }) - .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); }) - .tween("zoom", function() { - var that = this, - args = arguments, - g = gesture(that, args), - e = extent.apply(that, args), - p = center || centroid(e), - w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]), - a = that.__zoom, - b = typeof transform === "function" ? transform.apply(that, args) : transform, - i = interpolate$$1(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k)); - return function(t) { - if (t === 1) t = b; // Avoid rounding error on end. - else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); } - g.zoom(null, t); - }; - }); - } + // These recursive directive definitions must be deferred. + formats.x = newFormat(locale_date, formats); + formats.X = newFormat(locale_time, formats); + formats.c = newFormat(locale_dateTime, formats); + utcFormats.x = newFormat(locale_date, utcFormats); + utcFormats.X = newFormat(locale_time, utcFormats); + utcFormats.c = newFormat(locale_dateTime, utcFormats); - function gesture(that, args) { - for (var i = 0, n = gestures.length, g; i < n; ++i) { - if ((g = gestures[i]).that === that) { - return g; + function newFormat(specifier, formats) { + return function(date) { + var string = [], + i = -1, + j = 0, + n = specifier.length, + c, + pad, + format; + + if (!(date instanceof Date)) date = new Date(+date); + + while (++i < n) { + if (specifier.charCodeAt(i) === 37) { + string.push(specifier.slice(j, i)); + if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i); + else pad = c === "e" ? " " : "0"; + if (format = formats[c]) c = format(date, pad); + string.push(c); + j = i + 1; + } } - } - return new Gesture(that, args); - } - function Gesture(that, args) { - this.that = that; - this.args = args; - this.index = -1; - this.active = 0; - this.extent = extent.apply(that, args); + string.push(specifier.slice(j, i)); + return string.join(""); + }; } - Gesture.prototype = { - start: function() { - if (++this.active === 1) { - this.index = gestures.push(this) - 1; - this.emit("start"); + function newParse(specifier, newDate) { + return function(string) { + var d = newYear(1900), + i = parseSpecifier(d, specifier, string += "", 0); + if (i != string.length) return null; + + // The am-pm flag is 0 for AM, and 1 for PM. + if ("p" in d) d.H = d.H % 12 + d.p * 12; + + // Convert day-of-week and week-of-year to day-of-year. + if ("W" in d || "U" in d) { + if (!("w" in d)) d.w = "W" in d ? 1 : 0; + var day$$1 = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay(); + d.m = 0; + d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7; } - return this; - }, - zoom: function(key, transform) { - if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]); - if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]); - if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]); - this.that.__zoom = transform; - this.emit("zoom"); - return this; - }, - end: function() { - if (--this.active === 0) { - gestures.splice(this.index, 1); - this.index = -1; - this.emit("end"); + + // If a time zone is specified, all fields are interpreted as UTC and then + // offset according to the specified time zone. + if ("Z" in d) { + d.H += d.Z / 100 | 0; + d.M += d.Z % 100; + return utcDate(d); } - return this; - }, - emit: function(type) { - customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]); - } - }; - function wheeled() { - if (!filter.apply(this, arguments)) return; - var g = gesture(this, arguments), - t = this.__zoom, - k = Math.max(k0, Math.min(k1, t.k * Math.pow(2, -exports.event.deltaY * (exports.event.deltaMode ? 120 : 1) / 500))), - p = mouse(this); + // Otherwise, all fields are in local time. + return newDate(d); + }; + } - // If the mouse is in the same location as before, reuse it. - // If there were recent wheel events, reset the wheel idle timeout. - if (g.wheel) { - if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) { - g.mouse[1] = t.invert(g.mouse[0] = p); + function parseSpecifier(d, specifier, string, j) { + var i = 0, + n = specifier.length, + m = string.length, + c, + parse; + + while (i < n) { + if (j >= m) return -1; + c = specifier.charCodeAt(i++); + if (c === 37) { + c = specifier.charAt(i++); + parse = parses[c in pads ? specifier.charAt(i++) : c]; + if (!parse || ((j = parse(d, string, j)) < 0)) return -1; + } else if (c != string.charCodeAt(j++)) { + return -1; } - clearTimeout(g.wheel); } - // If this wheel event won’t trigger a transform change, ignore it. - else if (t.k === k) return; - - // Otherwise, capture the mouse point and location at the start. - else { - g.mouse = [p, t.invert(p)]; - interrupt(this); - g.start(); - } + return j; + } - noevent$1(); - g.wheel = setTimeout(wheelidled, wheelDelay); - g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent)); + function parsePeriod(d, string, i) { + var n = periodRe.exec(string.slice(i)); + return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1; + } - function wheelidled() { - g.wheel = null; - g.end(); - } + function parseShortWeekday(d, string, i) { + var n = shortWeekdayRe.exec(string.slice(i)); + return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1; } - function mousedowned() { - if (touchending || !filter.apply(this, arguments)) return; - var g = gesture(this, arguments), - v = select(exports.event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true), - p = mouse(this); + function parseWeekday(d, string, i) { + var n = weekdayRe.exec(string.slice(i)); + return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1; + } - dragDisable(exports.event.view); - nopropagation$1(); - g.mouse = [p, this.__zoom.invert(p)]; - interrupt(this); - g.start(); + function parseShortMonth(d, string, i) { + var n = shortMonthRe.exec(string.slice(i)); + return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1; + } - function mousemoved() { - noevent$1(); - g.moved = true; - g.zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent)); - } + function parseMonth(d, string, i) { + var n = monthRe.exec(string.slice(i)); + return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1; + } - function mouseupped() { - v.on("mousemove.zoom mouseup.zoom", null); - yesdrag(exports.event.view, g.moved); - noevent$1(); - g.end(); - } + function parseLocaleDateTime(d, string, i) { + return parseSpecifier(d, locale_dateTime, string, i); } - function dblclicked() { - if (!filter.apply(this, arguments)) return; - var t0 = this.__zoom, - p0 = mouse(this), - p1 = t0.invert(p0), - k1 = t0.k * (exports.event.shiftKey ? 0.5 : 2), - t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments)); + function parseLocaleDate(d, string, i) { + return parseSpecifier(d, locale_date, string, i); + } - noevent$1(); - if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0); - else select(this).call(zoom.transform, t1); + function parseLocaleTime(d, string, i) { + return parseSpecifier(d, locale_time, string, i); } - function touchstarted() { - if (!filter.apply(this, arguments)) return; - var g = gesture(this, arguments), - touches$$1 = exports.event.changedTouches, - n = touches$$1.length, i, t, p; + function formatShortWeekday(d) { + return locale_shortWeekdays[d.getDay()]; + } - nopropagation$1(); - for (i = 0; i < n; ++i) { - t = touches$$1[i], p = touch(this, touches$$1, t.identifier); - p = [p, this.__zoom.invert(p), t.identifier]; - if (!g.touch0) g.touch0 = p; - else if (!g.touch1) g.touch1 = p; - } + function formatWeekday(d) { + return locale_weekdays[d.getDay()]; + } - // If this is a dbltap, reroute to the (optional) dblclick.zoom handler. - if (touchstarting) { - touchstarting = clearTimeout(touchstarting); - if (!g.touch1) { - g.end(); - p = select(this).on("dblclick.zoom"); - if (p) p.apply(this, arguments); - return; - } - } + function formatShortMonth(d) { + return locale_shortMonths[d.getMonth()]; + } - if (exports.event.touches.length === n) { - touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay); - interrupt(this); - g.start(); - } + function formatMonth(d) { + return locale_months[d.getMonth()]; } - function touchmoved() { - var g = gesture(this, arguments), - touches$$1 = exports.event.changedTouches, - n = touches$$1.length, i, t, p, l; + function formatPeriod(d) { + return locale_periods[+(d.getHours() >= 12)]; + } - noevent$1(); - if (touchstarting) touchstarting = clearTimeout(touchstarting); - for (i = 0; i < n; ++i) { - t = touches$$1[i], p = touch(this, touches$$1, t.identifier); - if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p; - else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p; - } - t = g.that.__zoom; - if (g.touch1) { - var p0 = g.touch0[0], l0 = g.touch0[1], - p1 = g.touch1[0], l1 = g.touch1[1], - dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp, - dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl; - t = scale(t, Math.sqrt(dp / dl)); - p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2]; - l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2]; - } - else if (g.touch0) p = g.touch0[0], l = g.touch0[1]; - else return; - g.zoom("touch", constrain(translate(t, p, l), g.extent)); + function formatUTCShortWeekday(d) { + return locale_shortWeekdays[d.getUTCDay()]; } - function touchended() { - var g = gesture(this, arguments), - touches$$1 = exports.event.changedTouches, - n = touches$$1.length, i, t; + function formatUTCWeekday(d) { + return locale_weekdays[d.getUTCDay()]; + } - nopropagation$1(); - if (touchending) clearTimeout(touchending); - touchending = setTimeout(function() { touchending = null; }, touchDelay); - for (i = 0; i < n; ++i) { - t = touches$$1[i]; - if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0; - else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1; - } - if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1; - if (!g.touch0) g.end(); + function formatUTCShortMonth(d) { + return locale_shortMonths[d.getUTCMonth()]; } - zoom.filter = function(_) { - return arguments.length ? (filter = typeof _ === "function" ? _ : constant$10(!!_), zoom) : filter; - }; + function formatUTCMonth(d) { + return locale_months[d.getUTCMonth()]; + } - zoom.extent = function(_) { - return arguments.length ? (extent = typeof _ === "function" ? _ : constant$10([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent; - }; + function formatUTCPeriod(d) { + return locale_periods[+(d.getUTCHours() >= 12)]; + } - zoom.scaleExtent = function(_) { - return arguments.length ? (k0 = +_[0], k1 = +_[1], zoom) : [k0, k1]; + return { + format: function(specifier) { + var f = newFormat(specifier += "", formats); + f.toString = function() { return specifier; }; + return f; + }, + parse: function(specifier) { + var p = newParse(specifier += "", localDate); + p.toString = function() { return specifier; }; + return p; + }, + utcFormat: function(specifier) { + var f = newFormat(specifier += "", utcFormats); + f.toString = function() { return specifier; }; + return f; + }, + utcParse: function(specifier) { + var p = newParse(specifier, utcDate); + p.toString = function() { return specifier; }; + return p; + } }; +} - zoom.translateExtent = function(_) { - return arguments.length ? (x0 = +_[0][0], x1 = +_[1][0], y0 = +_[0][1], y1 = +_[1][1], zoom) : [[x0, y0], [x1, y1]]; - }; +var pads = {"-": "", "_": " ", "0": "0"}; +var numberRe = /^\s*\d+/; +var percentRe = /^%/; +var requoteRe = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g; - zoom.duration = function(_) { - return arguments.length ? (duration = +_, zoom) : duration; - }; +function pad(value, fill, width) { + var sign = value < 0 ? "-" : "", + string = (sign ? -value : value) + "", + length = string.length; + return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string); +} - zoom.interpolate = function(_) { - return arguments.length ? (interpolate$$1 = _, zoom) : interpolate$$1; - }; +function requote(s) { + return s.replace(requoteRe, "\\$&"); +} - zoom.on = function() { - var value = listeners.on.apply(listeners, arguments); - return value === listeners ? zoom : value; - }; +function formatRe(names) { + return new RegExp("^(?:" + names.map(requote).join("|") + ")", "i"); +} - return zoom; -}; +function formatLookup(names) { + var map = {}, i = -1, n = names.length; + while (++i < n) map[names[i].toLowerCase()] = i; + return map; +} -var constant$11 = function(x) { - return function() { - return x; - }; -}; +function parseWeekdayNumber(d, string, i) { + var n = numberRe.exec(string.slice(i, i + 1)); + return n ? (d.w = +n[0], i + n[0].length) : -1; +} -var BrushEvent = function(target, type, selection) { - this.target = target; - this.type = type; - this.selection = selection; -}; +function parseWeekNumberSunday(d, string, i) { + var n = numberRe.exec(string.slice(i)); + return n ? (d.U = +n[0], i + n[0].length) : -1; +} -function nopropagation$2() { - exports.event.stopImmediatePropagation(); +function parseWeekNumberMonday(d, string, i) { + var n = numberRe.exec(string.slice(i)); + return n ? (d.W = +n[0], i + n[0].length) : -1; } -var noevent$2 = function() { - exports.event.preventDefault(); - exports.event.stopImmediatePropagation(); -}; +function parseFullYear(d, string, i) { + var n = numberRe.exec(string.slice(i, i + 4)); + return n ? (d.y = +n[0], i + n[0].length) : -1; +} -var MODE_DRAG = {name: "drag"}; -var MODE_SPACE = {name: "space"}; -var MODE_HANDLE = {name: "handle"}; -var MODE_CENTER = {name: "center"}; +function parseYear(d, string, i) { + var n = numberRe.exec(string.slice(i, i + 2)); + return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1; +} -var X = { - name: "x", - handles: ["e", "w"].map(type$1), - input: function(x, e) { return x && [[x[0], e[0][1]], [x[1], e[1][1]]]; }, - output: function(xy) { return xy && [xy[0][0], xy[1][0]]; } -}; +function parseZone(d, string, i) { + var n = /^(Z)|([+-]\d\d)(?:\:?(\d\d))?/.exec(string.slice(i, i + 6)); + return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1; +} -var Y = { - name: "y", - handles: ["n", "s"].map(type$1), - input: function(y, e) { return y && [[e[0][0], y[0]], [e[1][0], y[1]]]; }, - output: function(xy) { return xy && [xy[0][1], xy[1][1]]; } -}; +function parseMonthNumber(d, string, i) { + var n = numberRe.exec(string.slice(i, i + 2)); + return n ? (d.m = n[0] - 1, i + n[0].length) : -1; +} -var XY = { - name: "xy", - handles: ["n", "e", "s", "w", "nw", "ne", "se", "sw"].map(type$1), - input: function(xy) { return xy; }, - output: function(xy) { return xy; } -}; +function parseDayOfMonth(d, string, i) { + var n = numberRe.exec(string.slice(i, i + 2)); + return n ? (d.d = +n[0], i + n[0].length) : -1; +} -var cursors = { - overlay: "crosshair", - selection: "move", - n: "ns-resize", - e: "ew-resize", - s: "ns-resize", - w: "ew-resize", - nw: "nwse-resize", - ne: "nesw-resize", - se: "nwse-resize", - sw: "nesw-resize" -}; +function parseDayOfYear(d, string, i) { + var n = numberRe.exec(string.slice(i, i + 3)); + return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1; +} -var flipX = { - e: "w", - w: "e", - nw: "ne", - ne: "nw", - se: "sw", - sw: "se" -}; +function parseHour24(d, string, i) { + var n = numberRe.exec(string.slice(i, i + 2)); + return n ? (d.H = +n[0], i + n[0].length) : -1; +} -var flipY = { - n: "s", - s: "n", - nw: "sw", - ne: "se", - se: "ne", - sw: "nw" -}; +function parseMinutes(d, string, i) { + var n = numberRe.exec(string.slice(i, i + 2)); + return n ? (d.M = +n[0], i + n[0].length) : -1; +} -var signsX = { - overlay: +1, - selection: +1, - n: null, - e: +1, - s: null, - w: -1, - nw: -1, - ne: +1, - se: +1, - sw: -1 -}; +function parseSeconds(d, string, i) { + var n = numberRe.exec(string.slice(i, i + 2)); + return n ? (d.S = +n[0], i + n[0].length) : -1; +} -var signsY = { - overlay: +1, - selection: +1, - n: -1, - e: null, - s: +1, - w: null, - nw: -1, - ne: -1, - se: +1, - sw: +1 -}; +function parseMilliseconds(d, string, i) { + var n = numberRe.exec(string.slice(i, i + 3)); + return n ? (d.L = +n[0], i + n[0].length) : -1; +} -function type$1(t) { - return {type: t}; +function parseLiteralPercent(d, string, i) { + var n = percentRe.exec(string.slice(i, i + 1)); + return n ? i + n[0].length : -1; } -// Ignore right-click, since that should open the context menu. -function defaultFilter$2() { - return !exports.event.button; +function formatDayOfMonth(d, p) { + return pad(d.getDate(), p, 2); +} + +function formatHour24(d, p) { + return pad(d.getHours(), p, 2); +} + +function formatHour12(d, p) { + return pad(d.getHours() % 12 || 12, p, 2); +} + +function formatDayOfYear(d, p) { + return pad(1 + day.count(year(d), d), p, 3); +} + +function formatMilliseconds(d, p) { + return pad(d.getMilliseconds(), p, 3); +} + +function formatMonthNumber(d, p) { + return pad(d.getMonth() + 1, p, 2); } -function defaultExtent$1() { - var svg = this.ownerSVGElement || this; - return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]]; +function formatMinutes(d, p) { + return pad(d.getMinutes(), p, 2); } -// Like d3.local, but with the name “__brush” rather than auto-generated. -function local$1(node) { - while (!node.__brush) if (!(node = node.parentNode)) return; - return node.__brush; +function formatSeconds(d, p) { + return pad(d.getSeconds(), p, 2); } -function empty$1(extent) { - return extent[0][0] === extent[1][0] - || extent[0][1] === extent[1][1]; +function formatWeekNumberSunday(d, p) { + return pad(sunday.count(year(d), d), p, 2); } -function brushSelection(node) { - var state = node.__brush; - return state ? state.dim.output(state.selection) : null; +function formatWeekdayNumber(d) { + return d.getDay(); } -function brushX() { - return brush$1(X); +function formatWeekNumberMonday(d, p) { + return pad(monday.count(year(d), d), p, 2); } -function brushY() { - return brush$1(Y); +function formatYear(d, p) { + return pad(d.getFullYear() % 100, p, 2); } -var brush = function() { - return brush$1(XY); -}; +function formatFullYear(d, p) { + return pad(d.getFullYear() % 10000, p, 4); +} -function brush$1(dim) { - var extent = defaultExtent$1, - filter = defaultFilter$2, - listeners = dispatch(brush, "start", "brush", "end"), - handleSize = 6, - touchending; +function formatZone(d) { + var z = d.getTimezoneOffset(); + return (z > 0 ? "-" : (z *= -1, "+")) + + pad(z / 60 | 0, "0", 2) + + pad(z % 60, "0", 2); +} - function brush(group) { - var overlay = group - .property("__brush", initialize) - .selectAll(".overlay") - .data([type$1("overlay")]); +function formatUTCDayOfMonth(d, p) { + return pad(d.getUTCDate(), p, 2); +} - overlay.enter().append("rect") - .attr("class", "overlay") - .attr("pointer-events", "all") - .attr("cursor", cursors.overlay) - .merge(overlay) - .each(function() { - var extent = local$1(this).extent; - select(this) - .attr("x", extent[0][0]) - .attr("y", extent[0][1]) - .attr("width", extent[1][0] - extent[0][0]) - .attr("height", extent[1][1] - extent[0][1]); - }); +function formatUTCHour24(d, p) { + return pad(d.getUTCHours(), p, 2); +} - group.selectAll(".selection") - .data([type$1("selection")]) - .enter().append("rect") - .attr("class", "selection") - .attr("cursor", cursors.selection) - .attr("fill", "#777") - .attr("fill-opacity", 0.3) - .attr("stroke", "#fff") - .attr("shape-rendering", "crispEdges"); +function formatUTCHour12(d, p) { + return pad(d.getUTCHours() % 12 || 12, p, 2); +} - var handle = group.selectAll(".handle") - .data(dim.handles, function(d) { return d.type; }); +function formatUTCDayOfYear(d, p) { + return pad(1 + utcDay.count(utcYear(d), d), p, 3); +} - handle.exit().remove(); +function formatUTCMilliseconds(d, p) { + return pad(d.getUTCMilliseconds(), p, 3); +} - handle.enter().append("rect") - .attr("class", function(d) { return "handle handle--" + d.type; }) - .attr("cursor", function(d) { return cursors[d.type]; }); +function formatUTCMonthNumber(d, p) { + return pad(d.getUTCMonth() + 1, p, 2); +} - group - .each(redraw) - .attr("fill", "none") - .attr("pointer-events", "all") - .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)") - .on("mousedown.brush touchstart.brush", started); - } +function formatUTCMinutes(d, p) { + return pad(d.getUTCMinutes(), p, 2); +} - brush.move = function(group, selection$$1) { - if (group.selection) { - group - .on("start.brush", function() { emitter(this, arguments).beforestart().start(); }) - .on("interrupt.brush end.brush", function() { emitter(this, arguments).end(); }) - .tween("brush", function() { - var that = this, - state = that.__brush, - emit = emitter(that, arguments), - selection0 = state.selection, - selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(this, arguments) : selection$$1, state.extent), - i = interpolate(selection0, selection1); +function formatUTCSeconds(d, p) { + return pad(d.getUTCSeconds(), p, 2); +} - function tween(t) { - state.selection = t === 1 && empty$1(selection1) ? null : i(t); - redraw.call(that); - emit.brush(); - } +function formatUTCWeekNumberSunday(d, p) { + return pad(utcSunday.count(utcYear(d), d), p, 2); +} - return selection0 && selection1 ? tween : tween(1); - }); - } else { - group - .each(function() { - var that = this, - args = arguments, - state = that.__brush, - selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(that, args) : selection$$1, state.extent), - emit = emitter(that, args).beforestart(); +function formatUTCWeekdayNumber(d) { + return d.getUTCDay(); +} - interrupt(that); - state.selection = selection1 == null || empty$1(selection1) ? null : selection1; - redraw.call(that); - emit.start().brush().end(); - }); - } - }; +function formatUTCWeekNumberMonday(d, p) { + return pad(utcMonday.count(utcYear(d), d), p, 2); +} - function redraw() { - var group = select(this), - selection$$1 = local$1(this).selection; +function formatUTCYear(d, p) { + return pad(d.getUTCFullYear() % 100, p, 2); +} - if (selection$$1) { - group.selectAll(".selection") - .style("display", null) - .attr("x", selection$$1[0][0]) - .attr("y", selection$$1[0][1]) - .attr("width", selection$$1[1][0] - selection$$1[0][0]) - .attr("height", selection$$1[1][1] - selection$$1[0][1]); +function formatUTCFullYear(d, p) { + return pad(d.getUTCFullYear() % 10000, p, 4); +} - group.selectAll(".handle") - .style("display", null) - .attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection$$1[1][0] - handleSize / 2 : selection$$1[0][0] - handleSize / 2; }) - .attr("y", function(d) { return d.type[0] === "s" ? selection$$1[1][1] - handleSize / 2 : selection$$1[0][1] - handleSize / 2; }) - .attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection$$1[1][0] - selection$$1[0][0] + handleSize : handleSize; }) - .attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection$$1[1][1] - selection$$1[0][1] + handleSize : handleSize; }); - } +function formatUTCZone() { + return "+0000"; +} - else { - group.selectAll(".selection,.handle") - .style("display", "none") - .attr("x", null) - .attr("y", null) - .attr("width", null) - .attr("height", null); - } - } +function formatLiteralPercent() { + return "%"; +} - function emitter(that, args) { - return that.__brush.emitter || new Emitter(that, args); - } +var locale$2; - function Emitter(that, args) { - this.that = that; - this.args = args; - this.state = that.__brush; - this.active = 0; - } - Emitter.prototype = { - beforestart: function() { - if (++this.active === 1) this.state.emitter = this, this.starting = true; - return this; - }, - start: function() { - if (this.starting) this.starting = false, this.emit("start"); - return this; - }, - brush: function() { - this.emit("brush"); - return this; - }, - end: function() { - if (--this.active === 0) delete this.state.emitter, this.emit("end"); - return this; - }, - emit: function(type) { - customEvent(new BrushEvent(brush, type, dim.output(this.state.selection)), listeners.apply, listeners, [type, this.that, this.args]); - } - }; - function started() { - if (exports.event.touches) { if (exports.event.changedTouches.length < exports.event.touches.length) return noevent$2(); } - else if (touchending) return; - if (!filter.apply(this, arguments)) return; - var that = this, - type = exports.event.target.__data__.type, - mode = (exports.event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (exports.event.altKey ? MODE_CENTER : MODE_HANDLE), - signX = dim === Y ? null : signsX[type], - signY = dim === X ? null : signsY[type], - state = local$1(that), - extent = state.extent, - selection$$1 = state.selection, - W = extent[0][0], w0, w1, - N = extent[0][1], n0, n1, - E = extent[1][0], e0, e1, - S = extent[1][1], s0, s1, - dx, - dy, - moving, - shifting = signX && signY && exports.event.shiftKey, - lockX, - lockY, - point0 = mouse(that), - point = point0, - emit = emitter(that, arguments).beforestart(); - if (type === "overlay") { - state.selection = selection$$1 = [ - [w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]], - [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0] - ]; - } else { - w0 = selection$$1[0][0]; - n0 = selection$$1[0][1]; - e0 = selection$$1[1][0]; - s0 = selection$$1[1][1]; - } +defaultLocale$1({ + dateTime: "%x, %X", + date: "%-m/%-d/%Y", + time: "%-I:%M:%S %p", + periods: ["AM", "PM"], + days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"], + shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"], + months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"], + shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"] +}); - w1 = w0; - n1 = n0; - e1 = e0; - s1 = s0; +function defaultLocale$1(definition) { + locale$2 = formatLocale$1(definition); + exports.timeFormat = locale$2.format; + exports.timeParse = locale$2.parse; + exports.utcFormat = locale$2.utcFormat; + exports.utcParse = locale$2.utcParse; + return locale$2; +} - var group = select(that) - .attr("pointer-events", "none"); +var isoSpecifier = "%Y-%m-%dT%H:%M:%S.%LZ"; - var overlay = group.selectAll(".overlay") - .attr("cursor", cursors[type]); +function formatIsoNative(date) { + return date.toISOString(); +} - if (exports.event.touches) { - group - .on("touchmove.brush", moved, true) - .on("touchend.brush touchcancel.brush", ended, true); - } else { - var view = select(exports.event.view) - .on("keydown.brush", keydowned, true) - .on("keyup.brush", keyupped, true) - .on("mousemove.brush", moved, true) - .on("mouseup.brush", ended, true); +var formatIso = Date.prototype.toISOString + ? formatIsoNative + : exports.utcFormat(isoSpecifier); - dragDisable(exports.event.view); - } +function parseIsoNative(string) { + var date = new Date(string); + return isNaN(date) ? null : date; +} - nopropagation$2(); - interrupt(that); - redraw.call(that); - emit.start(); +var parseIso = +new Date("2000-01-01T00:00:00.000Z") + ? parseIsoNative + : exports.utcParse(isoSpecifier); - function moved() { - var point1 = mouse(that); - if (shifting && !lockX && !lockY) { - if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true; - else lockX = true; - } - point = point1; - moving = true; - noevent$2(); - move(); - } +var durationSecond = 1000; +var durationMinute = durationSecond * 60; +var durationHour = durationMinute * 60; +var durationDay = durationHour * 24; +var durationWeek = durationDay * 7; +var durationMonth = durationDay * 30; +var durationYear = durationDay * 365; - function move() { - var t; +function date$1(t) { + return new Date(t); +} - dx = point[0] - point0[0]; - dy = point[1] - point0[1]; +function number$2(t) { + return t instanceof Date ? +t : +new Date(+t); +} - switch (mode) { - case MODE_SPACE: - case MODE_DRAG: { - if (signX) dx = Math.max(W - w0, Math.min(E - e0, dx)), w1 = w0 + dx, e1 = e0 + dx; - if (signY) dy = Math.max(N - n0, Math.min(S - s0, dy)), n1 = n0 + dy, s1 = s0 + dy; - break; - } - case MODE_HANDLE: { - if (signX < 0) dx = Math.max(W - w0, Math.min(E - w0, dx)), w1 = w0 + dx, e1 = e0; - else if (signX > 0) dx = Math.max(W - e0, Math.min(E - e0, dx)), w1 = w0, e1 = e0 + dx; - if (signY < 0) dy = Math.max(N - n0, Math.min(S - n0, dy)), n1 = n0 + dy, s1 = s0; - else if (signY > 0) dy = Math.max(N - s0, Math.min(S - s0, dy)), n1 = n0, s1 = s0 + dy; - break; - } - case MODE_CENTER: { - if (signX) w1 = Math.max(W, Math.min(E, w0 - dx * signX)), e1 = Math.max(W, Math.min(E, e0 + dx * signX)); - if (signY) n1 = Math.max(N, Math.min(S, n0 - dy * signY)), s1 = Math.max(N, Math.min(S, s0 + dy * signY)); - break; - } - } +function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format) { + var scale = continuous(deinterpolateLinear, reinterpolate), + invert = scale.invert, + domain = scale.domain; - if (e1 < w1) { - signX *= -1; - t = w0, w0 = e0, e0 = t; - t = w1, w1 = e1, e1 = t; - if (type in flipX) overlay.attr("cursor", cursors[type = flipX[type]]); - } + var formatMillisecond = format(".%L"), + formatSecond = format(":%S"), + formatMinute = format("%I:%M"), + formatHour = format("%I %p"), + formatDay = format("%a %d"), + formatWeek = format("%b %d"), + formatMonth = format("%B"), + formatYear = format("%Y"); - if (s1 < n1) { - signY *= -1; - t = n0, n0 = s0, s0 = t; - t = n1, n1 = s1, s1 = t; - if (type in flipY) overlay.attr("cursor", cursors[type = flipY[type]]); - } + var tickIntervals = [ + [second$$1, 1, durationSecond], + [second$$1, 5, 5 * durationSecond], + [second$$1, 15, 15 * durationSecond], + [second$$1, 30, 30 * durationSecond], + [minute$$1, 1, durationMinute], + [minute$$1, 5, 5 * durationMinute], + [minute$$1, 15, 15 * durationMinute], + [minute$$1, 30, 30 * durationMinute], + [ hour$$1, 1, durationHour ], + [ hour$$1, 3, 3 * durationHour ], + [ hour$$1, 6, 6 * durationHour ], + [ hour$$1, 12, 12 * durationHour ], + [ day$$1, 1, durationDay ], + [ day$$1, 2, 2 * durationDay ], + [ week, 1, durationWeek ], + [ month$$1, 1, durationMonth ], + [ month$$1, 3, 3 * durationMonth ], + [ year$$1, 1, durationYear ] + ]; - if (state.selection) selection$$1 = state.selection; // May be set by brush.move! - if (lockX) w1 = selection$$1[0][0], e1 = selection$$1[1][0]; - if (lockY) n1 = selection$$1[0][1], s1 = selection$$1[1][1]; + function tickFormat(date) { + return (second$$1(date) < date ? formatMillisecond + : minute$$1(date) < date ? formatSecond + : hour$$1(date) < date ? formatMinute + : day$$1(date) < date ? formatHour + : month$$1(date) < date ? (week(date) < date ? formatDay : formatWeek) + : year$$1(date) < date ? formatMonth + : formatYear)(date); + } - if (selection$$1[0][0] !== w1 - || selection$$1[0][1] !== n1 - || selection$$1[1][0] !== e1 - || selection$$1[1][1] !== s1) { - state.selection = [[w1, n1], [e1, s1]]; - redraw.call(that); - emit.brush(); - } - } + function tickInterval(interval, start, stop, step) { + if (interval == null) interval = 10; - function ended() { - nopropagation$2(); - if (exports.event.touches) { - if (exports.event.touches.length) return; - if (touchending) clearTimeout(touchending); - touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed! - group.on("touchmove.brush touchend.brush touchcancel.brush", null); + // If a desired tick count is specified, pick a reasonable tick interval + // based on the extent of the domain and a rough estimate of tick size. + // Otherwise, assume interval is already a time interval and use it. + if (typeof interval === "number") { + var target = Math.abs(stop - start) / interval, + i = bisector(function(i) { return i[2]; }).right(tickIntervals, target); + if (i === tickIntervals.length) { + step = tickStep(start / durationYear, stop / durationYear, interval); + interval = year$$1; + } else if (i) { + i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i]; + step = i[1]; + interval = i[0]; } else { - yesdrag(exports.event.view, moving); - view.on("keydown.brush keyup.brush mousemove.brush mouseup.brush", null); - } - group.attr("pointer-events", "all"); - overlay.attr("cursor", cursors.overlay); - if (state.selection) selection$$1 = state.selection; // May be set by brush.move (on start)! - if (empty$1(selection$$1)) state.selection = null, redraw.call(that); - emit.end(); - } - - function keydowned() { - switch (exports.event.keyCode) { - case 16: { // SHIFT - shifting = signX && signY; - break; - } - case 18: { // ALT - if (mode === MODE_HANDLE) { - if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX; - if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY; - mode = MODE_CENTER; - move(); - } - break; - } - case 32: { // SPACE; takes priority over ALT - if (mode === MODE_HANDLE || mode === MODE_CENTER) { - if (signX < 0) e0 = e1 - dx; else if (signX > 0) w0 = w1 - dx; - if (signY < 0) s0 = s1 - dy; else if (signY > 0) n0 = n1 - dy; - mode = MODE_SPACE; - overlay.attr("cursor", cursors.selection); - move(); - } - break; - } - default: return; + step = tickStep(start, stop, interval); + interval = millisecond$$1; } - noevent$2(); } - function keyupped() { - switch (exports.event.keyCode) { - case 16: { // SHIFT - if (shifting) { - lockX = lockY = shifting = false; - move(); - } - break; - } - case 18: { // ALT - if (mode === MODE_CENTER) { - if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1; - if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1; - mode = MODE_HANDLE; - move(); - } - break; - } - case 32: { // SPACE - if (mode === MODE_SPACE) { - if (exports.event.altKey) { - if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX; - if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY; - mode = MODE_CENTER; - } else { - if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1; - if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1; - mode = MODE_HANDLE; - } - overlay.attr("cursor", cursors[type]); - move(); - } - break; - } - default: return; - } - noevent$2(); - } + return step == null ? interval : interval.every(step); } - function initialize() { - var state = this.__brush || {selection: null}; - state.extent = extent.apply(this, arguments); - state.dim = dim; - return state; - } + scale.invert = function(y) { + return new Date(invert(y)); + }; - brush.extent = function(_) { - return arguments.length ? (extent = typeof _ === "function" ? _ : constant$11([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), brush) : extent; + scale.domain = function(_) { + return arguments.length ? domain(map$3.call(_, number$2)) : domain().map(date$1); + }; + + scale.ticks = function(interval, step) { + var d = domain(), + t0 = d[0], + t1 = d[d.length - 1], + r = t1 < t0, + t; + if (r) t = t0, t0 = t1, t1 = t; + t = tickInterval(interval, t0, t1, step); + t = t ? t.range(t0, t1 + 1) : []; // inclusive stop + return r ? t.reverse() : t; }; - brush.filter = function(_) { - return arguments.length ? (filter = typeof _ === "function" ? _ : constant$11(!!_), brush) : filter; + scale.tickFormat = function(count, specifier) { + return specifier == null ? tickFormat : format(specifier); }; - brush.handleSize = function(_) { - return arguments.length ? (handleSize = +_, brush) : handleSize; + scale.nice = function(interval, step) { + var d = domain(); + return (interval = tickInterval(interval, d[0], d[d.length - 1], step)) + ? domain(nice(d, interval)) + : scale; }; - brush.on = function() { - var value = listeners.on.apply(listeners, arguments); - return value === listeners ? brush : value; + scale.copy = function() { + return copy(scale, calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format)); }; - return brush; + return scale; } -var cos = Math.cos; -var sin = Math.sin; -var pi$3 = Math.PI; -var halfPi$2 = pi$3 / 2; -var tau$3 = pi$3 * 2; -var max$1 = Math.max; +var time = function() { + return calendar(year, month, sunday, day, hour, minute, second, millisecond, exports.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]); +}; -function compareValue(compare) { - return function(a, b) { - return compare( - a.source.value + a.target.value, - b.source.value + b.target.value - ); - }; -} +var utcTime = function() { + return calendar(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute, second, millisecond, exports.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]); +}; -var chord = function() { - var padAngle = 0, - sortGroups = null, - sortSubgroups = null, - sortChords = null; +var colors = function(s) { + return s.match(/.{6}/g).map(function(x) { + return "#" + x; + }); +}; - function chord(matrix) { - var n = matrix.length, - groupSums = [], - groupIndex = range(n), - subgroupIndex = [], - chords = [], - groups = chords.groups = new Array(n), - subgroups = new Array(n * n), - k, - x, - x0, - dx, - i, - j; +var category10 = colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf"); - // Compute the sum. - k = 0, i = -1; while (++i < n) { - x = 0, j = -1; while (++j < n) { - x += matrix[i][j]; - } - groupSums.push(x); - subgroupIndex.push(range(n)); - k += x; - } +var category20b = colors("393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6"); - // Sort groups… - if (sortGroups) groupIndex.sort(function(a, b) { - return sortGroups(groupSums[a], groupSums[b]); - }); +var category20c = colors("3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9"); - // Sort subgroups… - if (sortSubgroups) subgroupIndex.forEach(function(d, i) { - d.sort(function(a, b) { - return sortSubgroups(matrix[i][a], matrix[i][b]); - }); - }); +var category20 = colors("1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5"); - // Convert the sum to scaling factor for [0, 2pi]. - // TODO Allow start and end angle to be specified? - // TODO Allow padding to be specified as percentage? - k = max$1(0, tau$3 - padAngle * n) / k; - dx = k ? padAngle : tau$3 / n; +var cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0)); - // Compute the start and end angle for each group and subgroup. - // Note: Opera has a bug reordering object literal properties! - x = 0, i = -1; while (++i < n) { - x0 = x, j = -1; while (++j < n) { - var di = groupIndex[i], - dj = subgroupIndex[di][j], - v = matrix[di][dj], - a0 = x, - a1 = x += v * k; - subgroups[dj * n + di] = { - index: di, - subindex: dj, - startAngle: a0, - endAngle: a1, - value: v - }; - } - groups[di] = { - index: di, - startAngle: x0, - endAngle: x, - value: groupSums[di] - }; - x += dx; - } +var warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8)); - // Generate chords for each (non-empty) subgroup-subgroup link. - i = -1; while (++i < n) { - j = i - 1; while (++j < n) { - var source = subgroups[j * n + i], - target = subgroups[i * n + j]; - if (source.value || target.value) { - chords.push(source.value < target.value - ? {source: target, target: source} - : {source: source, target: target}); - } - } - } +var cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8)); - return sortChords ? chords.sort(sortChords) : chords; - } +var rainbow = cubehelix(); - chord.padAngle = function(_) { - return arguments.length ? (padAngle = max$1(0, _), chord) : padAngle; +var rainbow$1 = function(t) { + if (t < 0 || t > 1) t -= Math.floor(t); + var ts = Math.abs(t - 0.5); + rainbow.h = 360 * t - 100; + rainbow.s = 1.5 - 1.5 * ts; + rainbow.l = 0.8 - 0.9 * ts; + return rainbow + ""; +}; + +function ramp(range) { + var n = range.length; + return function(t) { + return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))]; }; +} - chord.sortGroups = function(_) { - return arguments.length ? (sortGroups = _, chord) : sortGroups; +var viridis = ramp(colors("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")); + +var magma = ramp(colors("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")); + +var inferno = ramp(colors("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")); + +var plasma = ramp(colors("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")); + +function sequential(interpolator) { + var x0 = 0, + x1 = 1, + clamp = false; + + function scale(x) { + var t = (x - x0) / (x1 - x0); + return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t); + } + + scale.domain = function(_) { + return arguments.length ? (x0 = +_[0], x1 = +_[1], scale) : [x0, x1]; }; - chord.sortSubgroups = function(_) { - return arguments.length ? (sortSubgroups = _, chord) : sortSubgroups; + scale.clamp = function(_) { + return arguments.length ? (clamp = !!_, scale) : clamp; }; - chord.sortChords = function(_) { - return arguments.length ? (_ == null ? sortChords = null : (sortChords = compareValue(_))._ = _, chord) : sortChords && sortChords._; + scale.interpolator = function(_) { + return arguments.length ? (interpolator = _, scale) : interpolator; }; - return chord; -}; + scale.copy = function() { + return sequential(interpolator).domain([x0, x1]).clamp(clamp); + }; -var slice$5 = Array.prototype.slice; + return linearish(scale); +} -var constant$12 = function(x) { - return function() { +var constant$10 = function(x) { + return function constant() { return x; }; }; -function defaultSource(d) { - return d.source; +var abs$1 = Math.abs; +var atan2$1 = Math.atan2; +var cos$2 = Math.cos; +var max$2 = Math.max; +var min$1 = Math.min; +var sin$2 = Math.sin; +var sqrt$2 = Math.sqrt; + +var epsilon$3 = 1e-12; +var pi$4 = Math.PI; +var halfPi$3 = pi$4 / 2; +var tau$4 = 2 * pi$4; + +function acos$1(x) { + return x > 1 ? 0 : x < -1 ? pi$4 : Math.acos(x); } -function defaultTarget(d) { - return d.target; +function asin$1(x) { + return x >= 1 ? halfPi$3 : x <= -1 ? -halfPi$3 : Math.asin(x); } -function defaultRadius$1(d) { - return d.radius; +function arcInnerRadius(d) { + return d.innerRadius; } -function defaultStartAngle(d) { +function arcOuterRadius(d) { + return d.outerRadius; +} + +function arcStartAngle(d) { return d.startAngle; } -function defaultEndAngle(d) { +function arcEndAngle(d) { return d.endAngle; } -var ribbon = function() { - var source = defaultSource, - target = defaultTarget, - radius = defaultRadius$1, - startAngle = defaultStartAngle, - endAngle = defaultEndAngle, +function arcPadAngle(d) { + return d && d.padAngle; // Note: optional! +} + +function intersect(x0, y0, x1, y1, x2, y2, x3, y3) { + var x10 = x1 - x0, y10 = y1 - y0, + x32 = x3 - x2, y32 = y3 - y2, + t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10); + return [x0 + t * x10, y0 + t * y10]; +} + +// Compute perpendicular offset line of length rc. +// http://mathworld.wolfram.com/Circle-LineIntersection.html +function cornerTangents(x0, y0, x1, y1, r1, rc, cw) { + var x01 = x0 - x1, + y01 = y0 - y1, + lo = (cw ? rc : -rc) / sqrt$2(x01 * x01 + y01 * y01), + ox = lo * y01, + oy = -lo * x01, + x11 = x0 + ox, + y11 = y0 + oy, + x10 = x1 + ox, + y10 = y1 + oy, + x00 = (x11 + x10) / 2, + y00 = (y11 + y10) / 2, + dx = x10 - x11, + dy = y10 - y11, + d2 = dx * dx + dy * dy, + r = r1 - rc, + D = x11 * y10 - x10 * y11, + d = (dy < 0 ? -1 : 1) * sqrt$2(max$2(0, r * r * d2 - D * D)), + cx0 = (D * dy - dx * d) / d2, + cy0 = (-D * dx - dy * d) / d2, + cx1 = (D * dy + dx * d) / d2, + cy1 = (-D * dx + dy * d) / d2, + dx0 = cx0 - x00, + dy0 = cy0 - y00, + dx1 = cx1 - x00, + dy1 = cy1 - y00; + + // Pick the closer of the two intersection points. + // TODO Is there a faster way to determine which intersection to use? + if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1; + + return { + cx: cx0, + cy: cy0, + x01: -ox, + y01: -oy, + x11: cx0 * (r1 / r - 1), + y11: cy0 * (r1 / r - 1) + }; +} + +var arc = function() { + var innerRadius = arcInnerRadius, + outerRadius = arcOuterRadius, + cornerRadius = constant$10(0), + padRadius = null, + startAngle = arcStartAngle, + endAngle = arcEndAngle, + padAngle = arcPadAngle, context = null; - function ribbon() { + function arc() { var buffer, - argv = slice$5.call(arguments), - s = source.apply(this, argv), - t = target.apply(this, argv), - sr = +radius.apply(this, (argv[0] = s, argv)), - sa0 = startAngle.apply(this, argv) - halfPi$2, - sa1 = endAngle.apply(this, argv) - halfPi$2, - sx0 = sr * cos(sa0), - sy0 = sr * sin(sa0), - tr = +radius.apply(this, (argv[0] = t, argv)), - ta0 = startAngle.apply(this, argv) - halfPi$2, - ta1 = endAngle.apply(this, argv) - halfPi$2; + r, + r0 = +innerRadius.apply(this, arguments), + r1 = +outerRadius.apply(this, arguments), + a0 = startAngle.apply(this, arguments) - halfPi$3, + a1 = endAngle.apply(this, arguments) - halfPi$3, + da = abs$1(a1 - a0), + cw = a1 > a0; if (!context) context = buffer = path(); - context.moveTo(sx0, sy0); - context.arc(0, 0, sr, sa0, sa1); - if (sa0 !== ta0 || sa1 !== ta1) { // TODO sr !== tr? - context.quadraticCurveTo(0, 0, tr * cos(ta0), tr * sin(ta0)); - context.arc(0, 0, tr, ta0, ta1); + // Ensure that the outer radius is always larger than the inner radius. + if (r1 < r0) r = r1, r1 = r0, r0 = r; + + // Is it a point? + if (!(r1 > epsilon$3)) context.moveTo(0, 0); + + // Or is it a circle or annulus? + else if (da > tau$4 - epsilon$3) { + context.moveTo(r1 * cos$2(a0), r1 * sin$2(a0)); + context.arc(0, 0, r1, a0, a1, !cw); + if (r0 > epsilon$3) { + context.moveTo(r0 * cos$2(a1), r0 * sin$2(a1)); + context.arc(0, 0, r0, a1, a0, cw); + } } - context.quadraticCurveTo(0, 0, sx0, sy0); - context.closePath(); - if (buffer) return context = null, buffer + "" || null; - } + // Or is it a circular or annular sector? + else { + var a01 = a0, + a11 = a1, + a00 = a0, + a10 = a1, + da0 = da, + da1 = da, + ap = padAngle.apply(this, arguments) / 2, + rp = (ap > epsilon$3) && (padRadius ? +padRadius.apply(this, arguments) : sqrt$2(r0 * r0 + r1 * r1)), + rc = min$1(abs$1(r1 - r0) / 2, +cornerRadius.apply(this, arguments)), + rc0 = rc, + rc1 = rc, + t0, + t1; - ribbon.radius = function(_) { - return arguments.length ? (radius = typeof _ === "function" ? _ : constant$12(+_), ribbon) : radius; - }; + // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0. + if (rp > epsilon$3) { + var p0 = asin$1(rp / r0 * sin$2(ap)), + p1 = asin$1(rp / r1 * sin$2(ap)); + if ((da0 -= p0 * 2) > epsilon$3) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0; + else da0 = 0, a00 = a10 = (a0 + a1) / 2; + if ((da1 -= p1 * 2) > epsilon$3) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1; + else da1 = 0, a01 = a11 = (a0 + a1) / 2; + } - ribbon.startAngle = function(_) { - return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$12(+_), ribbon) : startAngle; - }; + var x01 = r1 * cos$2(a01), + y01 = r1 * sin$2(a01), + x10 = r0 * cos$2(a10), + y10 = r0 * sin$2(a10); - ribbon.endAngle = function(_) { - return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$12(+_), ribbon) : endAngle; - }; + // Apply rounded corners? + if (rc > epsilon$3) { + var x11 = r1 * cos$2(a11), + y11 = r1 * sin$2(a11), + x00 = r0 * cos$2(a00), + y00 = r0 * sin$2(a00); - ribbon.source = function(_) { - return arguments.length ? (source = _, ribbon) : source; - }; + // Restrict the corner radius according to the sector angle. + if (da < pi$4) { + var oc = da0 > epsilon$3 ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10], + ax = x01 - oc[0], + ay = y01 - oc[1], + bx = x11 - oc[0], + by = y11 - oc[1], + kc = 1 / sin$2(acos$1((ax * bx + ay * by) / (sqrt$2(ax * ax + ay * ay) * sqrt$2(bx * bx + by * by))) / 2), + lc = sqrt$2(oc[0] * oc[0] + oc[1] * oc[1]); + rc0 = min$1(rc, (r0 - lc) / (kc - 1)); + rc1 = min$1(rc, (r1 - lc) / (kc + 1)); + } + } - ribbon.target = function(_) { - return arguments.length ? (target = _, ribbon) : target; - }; + // Is the sector collapsed to a line? + if (!(da1 > epsilon$3)) context.moveTo(x01, y01); - ribbon.context = function(_) { - return arguments.length ? ((context = _ == null ? null : _), ribbon) : context; - }; + // Does the sector’s outer ring have rounded corners? + else if (rc1 > epsilon$3) { + t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw); + t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw); - return ribbon; -}; + context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01); -// Adds floating point numbers with twice the normal precision. -// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and -// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3) -// 305–363 (1997). -// Code adapted from GeographicLib by Charles F. F. Karney, -// http://geographiclib.sourceforge.net/ + // Have the corners merged? + if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw); -var adder = function() { - return new Adder; -}; + // Otherwise, draw the two corners and the ring. + else { + context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw); + context.arc(0, 0, r1, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), !cw); + context.arc(t1.cx, t1.cy, rc1, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw); + } + } -function Adder() { - this.reset(); -} + // Or is the outer ring just a circular arc? + else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw); -Adder.prototype = { - constructor: Adder, - reset: function() { - this.s = // rounded value - this.t = 0; // exact error - }, - add: function(y) { - add$1(temp, y, this.t); - add$1(this, temp.s, this.s); - if (this.s) this.t += temp.t; - else this.s = temp.t; - }, - valueOf: function() { - return this.s; - } -}; + // Is there no inner ring, and it’s a circular sector? + // Or perhaps it’s an annular sector collapsed due to padding? + if (!(r0 > epsilon$3) || !(da0 > epsilon$3)) context.lineTo(x10, y10); -var temp = new Adder; + // Does the sector’s inner ring (or point) have rounded corners? + else if (rc0 > epsilon$3) { + t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw); + t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw); -function add$1(adder, a, b) { - var x = adder.s = a + b, - bv = x - a, - av = x - bv; - adder.t = (a - av) + (b - bv); -} + context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01); -var epsilon$4 = 1e-6; -var epsilon2$2 = 1e-12; -var pi$4 = Math.PI; -var halfPi$3 = pi$4 / 2; -var quarterPi = pi$4 / 4; -var tau$4 = pi$4 * 2; + // Have the corners merged? + if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw); -var degrees$1 = 180 / pi$4; -var radians = pi$4 / 180; + // Otherwise, draw the two corners and the ring. + else { + context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw); + context.arc(0, 0, r0, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), cw); + context.arc(t1.cx, t1.cy, rc0, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw); + } + } -var abs = Math.abs; -var atan = Math.atan; -var atan2 = Math.atan2; -var cos$1 = Math.cos; -var ceil = Math.ceil; -var exp = Math.exp; + // Or is the inner ring just a circular arc? + else context.arc(0, 0, r0, a10, a00, cw); + } -var log$1 = Math.log; -var pow$1 = Math.pow; -var sin$1 = Math.sin; -var sign$1 = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; }; -var sqrt$1 = Math.sqrt; -var tan = Math.tan; + context.closePath(); -function acos(x) { - return x > 1 ? 0 : x < -1 ? pi$4 : Math.acos(x); -} + if (buffer) return context = null, buffer + "" || null; + } -function asin$1(x) { - return x > 1 ? halfPi$3 : x < -1 ? -halfPi$3 : Math.asin(x); -} + arc.centroid = function() { + var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2, + a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi$4 / 2; + return [cos$2(a) * r, sin$2(a) * r]; + }; -function haversin(x) { - return (x = sin$1(x / 2)) * x; -} + arc.innerRadius = function(_) { + return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : innerRadius; + }; -function noop$2() {} + arc.outerRadius = function(_) { + return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : outerRadius; + }; -function streamGeometry(geometry, stream) { - if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) { - streamGeometryType[geometry.type](geometry, stream); - } -} + arc.cornerRadius = function(_) { + return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : cornerRadius; + }; -var streamObjectType = { - Feature: function(feature, stream) { - streamGeometry(feature.geometry, stream); - }, - FeatureCollection: function(object, stream) { - var features = object.features, i = -1, n = features.length; - while (++i < n) streamGeometry(features[i].geometry, stream); - } -}; + arc.padRadius = function(_) { + return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), arc) : padRadius; + }; -var streamGeometryType = { - Sphere: function(object, stream) { - stream.sphere(); - }, - Point: function(object, stream) { - object = object.coordinates; - stream.point(object[0], object[1], object[2]); - }, - MultiPoint: function(object, stream) { - var coordinates = object.coordinates, i = -1, n = coordinates.length; - while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]); - }, - LineString: function(object, stream) { - streamLine(object.coordinates, stream, 0); - }, - MultiLineString: function(object, stream) { - var coordinates = object.coordinates, i = -1, n = coordinates.length; - while (++i < n) streamLine(coordinates[i], stream, 0); - }, - Polygon: function(object, stream) { - streamPolygon(object.coordinates, stream); - }, - MultiPolygon: function(object, stream) { - var coordinates = object.coordinates, i = -1, n = coordinates.length; - while (++i < n) streamPolygon(coordinates[i], stream); - }, - GeometryCollection: function(object, stream) { - var geometries = object.geometries, i = -1, n = geometries.length; - while (++i < n) streamGeometry(geometries[i], stream); - } -}; + arc.startAngle = function(_) { + return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : startAngle; + }; -function streamLine(coordinates, stream, closed) { - var i = -1, n = coordinates.length - closed, coordinate; - stream.lineStart(); - while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]); - stream.lineEnd(); -} + arc.endAngle = function(_) { + return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : endAngle; + }; -function streamPolygon(coordinates, stream) { - var i = -1, n = coordinates.length; - stream.polygonStart(); - while (++i < n) streamLine(coordinates[i], stream, 1); - stream.polygonEnd(); -} + arc.padAngle = function(_) { + return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : padAngle; + }; -var geoStream = function(object, stream) { - if (object && streamObjectType.hasOwnProperty(object.type)) { - streamObjectType[object.type](object, stream); - } else { - streamGeometry(object, stream); - } -}; + arc.context = function(_) { + return arguments.length ? ((context = _ == null ? null : _), arc) : context; + }; -var areaRingSum = adder(); + return arc; +}; -var areaSum = adder(); -var lambda00; -var phi00; -var lambda0; -var cosPhi0; -var sinPhi0; +function Linear(context) { + this._context = context; +} -var areaStream = { - point: noop$2, - lineStart: noop$2, - lineEnd: noop$2, - polygonStart: function() { - areaRingSum.reset(); - areaStream.lineStart = areaRingStart; - areaStream.lineEnd = areaRingEnd; +Linear.prototype = { + areaStart: function() { + this._line = 0; }, - polygonEnd: function() { - var areaRing = +areaRingSum; - areaSum.add(areaRing < 0 ? tau$4 + areaRing : areaRing); - this.lineStart = this.lineEnd = this.point = noop$2; + areaEnd: function() { + this._line = NaN; }, - sphere: function() { - areaSum.add(tau$4); + lineStart: function() { + this._point = 0; + }, + lineEnd: function() { + if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); + this._line = 1 - this._line; + }, + point: function(x, y) { + x = +x, y = +y; + switch (this._point) { + case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; + case 1: this._point = 2; // proceed + default: this._context.lineTo(x, y); break; + } } }; -function areaRingStart() { - areaStream.point = areaPointFirst; -} +var curveLinear = function(context) { + return new Linear(context); +}; -function areaRingEnd() { - areaPoint(lambda00, phi00); +function x$3(p) { + return p[0]; } -function areaPointFirst(lambda, phi) { - areaStream.point = areaPoint; - lambda00 = lambda, phi00 = phi; - lambda *= radians, phi *= radians; - lambda0 = lambda, cosPhi0 = cos$1(phi = phi / 2 + quarterPi), sinPhi0 = sin$1(phi); +function y$3(p) { + return p[1]; } -function areaPoint(lambda, phi) { - lambda *= radians, phi *= radians; - phi = phi / 2 + quarterPi; // half the angular distance from south pole +var line = function() { + var x$$1 = x$3, + y$$1 = y$3, + defined = constant$10(true), + context = null, + curve = curveLinear, + output = null; - // Spherical excess E for a spherical triangle with vertices: south pole, - // previous point, current point. Uses a formula derived from Cagnoli’s - // theorem. See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2). - var dLambda = lambda - lambda0, - sdLambda = dLambda >= 0 ? 1 : -1, - adLambda = sdLambda * dLambda, - cosPhi = cos$1(phi), - sinPhi = sin$1(phi), - k = sinPhi0 * sinPhi, - u = cosPhi0 * cosPhi + k * cos$1(adLambda), - v = k * sdLambda * sin$1(adLambda); - areaRingSum.add(atan2(v, u)); + function line(data) { + var i, + n = data.length, + d, + defined0 = false, + buffer; - // Advance the previous points. - lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi; -} + if (context == null) output = curve(buffer = path()); -var area$2 = function(object) { - areaSum.reset(); - geoStream(object, areaStream); - return areaSum * 2; -}; + for (i = 0; i <= n; ++i) { + if (!(i < n && defined(d = data[i], i, data)) === defined0) { + if (defined0 = !defined0) output.lineStart(); + else output.lineEnd(); + } + if (defined0) output.point(+x$$1(d, i, data), +y$$1(d, i, data)); + } -function spherical(cartesian) { - return [atan2(cartesian[1], cartesian[0]), asin$1(cartesian[2])]; -} + if (buffer) return output = null, buffer + "" || null; + } -function cartesian(spherical) { - var lambda = spherical[0], phi = spherical[1], cosPhi = cos$1(phi); - return [cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)]; -} + line.x = function(_) { + return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$10(+_), line) : x$$1; + }; -function cartesianDot(a, b) { - return a[0] * b[0] + a[1] * b[1] + a[2] * b[2]; -} + line.y = function(_) { + return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$10(+_), line) : y$$1; + }; -function cartesianCross(a, b) { - return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]]; -} + line.defined = function(_) { + return arguments.length ? (defined = typeof _ === "function" ? _ : constant$10(!!_), line) : defined; + }; -// TODO return a -function cartesianAddInPlace(a, b) { - a[0] += b[0], a[1] += b[1], a[2] += b[2]; -} + line.curve = function(_) { + return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve; + }; -function cartesianScale(vector, k) { - return [vector[0] * k, vector[1] * k, vector[2] * k]; -} + line.context = function(_) { + return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context; + }; -// TODO return d -function cartesianNormalizeInPlace(d) { - var l = sqrt$1(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]); - d[0] /= l, d[1] /= l, d[2] /= l; -} + return line; +}; -var lambda0$1; -var phi0; -var lambda1; -var phi1; -var lambda2; -var lambda00$1; -var phi00$1; -var p0; -var deltaSum = adder(); -var ranges; -var range$1; +var area$2 = function() { + var x0 = x$3, + x1 = null, + y0 = constant$10(0), + y1 = y$3, + defined = constant$10(true), + context = null, + curve = curveLinear, + output = null; -var boundsStream = { - point: boundsPoint, - lineStart: boundsLineStart, - lineEnd: boundsLineEnd, - polygonStart: function() { - boundsStream.point = boundsRingPoint; - boundsStream.lineStart = boundsRingStart; - boundsStream.lineEnd = boundsRingEnd; - deltaSum.reset(); - areaStream.polygonStart(); - }, - polygonEnd: function() { - areaStream.polygonEnd(); - boundsStream.point = boundsPoint; - boundsStream.lineStart = boundsLineStart; - boundsStream.lineEnd = boundsLineEnd; - if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90); - else if (deltaSum > epsilon$4) phi1 = 90; - else if (deltaSum < -epsilon$4) phi0 = -90; - range$1[0] = lambda0$1, range$1[1] = lambda1; - } -}; + function area(data) { + var i, + j, + k, + n = data.length, + d, + defined0 = false, + buffer, + x0z = new Array(n), + y0z = new Array(n); -function boundsPoint(lambda, phi) { - ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]); - if (phi < phi0) phi0 = phi; - if (phi > phi1) phi1 = phi; -} + if (context == null) output = curve(buffer = path()); -function linePoint(lambda, phi) { - var p = cartesian([lambda * radians, phi * radians]); - if (p0) { - var normal = cartesianCross(p0, p), - equatorial = [normal[1], -normal[0], 0], - inflection = cartesianCross(equatorial, normal); - cartesianNormalizeInPlace(inflection); - inflection = spherical(inflection); - var delta = lambda - lambda2, - sign$$1 = delta > 0 ? 1 : -1, - lambdai = inflection[0] * degrees$1 * sign$$1, - phii, - antimeridian = abs(delta) > 180; - if (antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) { - phii = inflection[1] * degrees$1; - if (phii > phi1) phi1 = phii; - } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) { - phii = -inflection[1] * degrees$1; - if (phii < phi0) phi0 = phii; - } else { - if (phi < phi0) phi0 = phi; - if (phi > phi1) phi1 = phi; - } - if (antimeridian) { - if (lambda < lambda2) { - if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda; - } else { - if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda; - } - } else { - if (lambda1 >= lambda0$1) { - if (lambda < lambda0$1) lambda0$1 = lambda; - if (lambda > lambda1) lambda1 = lambda; - } else { - if (lambda > lambda2) { - if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda; + for (i = 0; i <= n; ++i) { + if (!(i < n && defined(d = data[i], i, data)) === defined0) { + if (defined0 = !defined0) { + j = i; + output.areaStart(); + output.lineStart(); } else { - if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda; + output.lineEnd(); + output.lineStart(); + for (k = i - 1; k >= j; --k) { + output.point(x0z[k], y0z[k]); + } + output.lineEnd(); + output.areaEnd(); } } + if (defined0) { + x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data); + output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]); + } } - } else { - boundsPoint(lambda, phi); - } - p0 = p, lambda2 = lambda; -} -function boundsLineStart() { - boundsStream.point = linePoint; -} - -function boundsLineEnd() { - range$1[0] = lambda0$1, range$1[1] = lambda1; - boundsStream.point = boundsPoint; - p0 = null; -} - -function boundsRingPoint(lambda, phi) { - if (p0) { - var delta = lambda - lambda2; - deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta); - } else { - lambda00$1 = lambda, phi00$1 = phi; + if (buffer) return output = null, buffer + "" || null; } - areaStream.point(lambda, phi); - linePoint(lambda, phi); -} -function boundsRingStart() { - areaStream.lineStart(); -} + function arealine() { + return line().defined(defined).curve(curve).context(context); + } -function boundsRingEnd() { - boundsRingPoint(lambda00$1, phi00$1); - areaStream.lineEnd(); - if (abs(deltaSum) > epsilon$4) lambda0$1 = -(lambda1 = 180); - range$1[0] = lambda0$1, range$1[1] = lambda1; - p0 = null; -} + area.x = function(_) { + return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$10(+_), x1 = null, area) : x0; + }; -// Finds the left-right distance between two longitudes. -// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want -// the distance between ±180° to be 360°. -function angle(lambda0, lambda1) { - return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1; -} + area.x0 = function(_) { + return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$10(+_), area) : x0; + }; -function rangeCompare(a, b) { - return a[0] - b[0]; -} + area.x1 = function(_) { + return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), area) : x1; + }; -function rangeContains(range, x) { - return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x; -} + area.y = function(_) { + return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$10(+_), y1 = null, area) : y0; + }; -var bounds = function(feature) { - var i, n, a, b, merged, deltaMax, delta; + area.y0 = function(_) { + return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$10(+_), area) : y0; + }; - phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity); - ranges = []; - geoStream(feature, boundsStream); + area.y1 = function(_) { + return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), area) : y1; + }; - // First, sort ranges by their minimum longitudes. - if (n = ranges.length) { - ranges.sort(rangeCompare); + area.lineX0 = + area.lineY0 = function() { + return arealine().x(x0).y(y0); + }; - // Then, merge any ranges that overlap. - for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) { - b = ranges[i]; - if (rangeContains(a, b[0]) || rangeContains(a, b[1])) { - if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1]; - if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0]; - } else { - merged.push(a = b); - } - } + area.lineY1 = function() { + return arealine().x(x0).y(y1); + }; - // Finally, find the largest gap between the merged ranges. - // The final bounding box will be the inverse of this gap. - for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) { - b = merged[i]; - if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1]; - } - } + area.lineX1 = function() { + return arealine().x(x1).y(y0); + }; - ranges = range$1 = null; + area.defined = function(_) { + return arguments.length ? (defined = typeof _ === "function" ? _ : constant$10(!!_), area) : defined; + }; - return lambda0$1 === Infinity || phi0 === Infinity - ? [[NaN, NaN], [NaN, NaN]] - : [[lambda0$1, phi0], [lambda1, phi1]]; -}; + area.curve = function(_) { + return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve; + }; -var W0; -var W1; -var X0; -var Y0; -var Z0; -var X1; -var Y1; -var Z1; -var X2; -var Y2; -var Z2; -var lambda00$2; -var phi00$2; -var x0; -var y0; -var z0; // previous point + area.context = function(_) { + return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context; + }; -var centroidStream = { - sphere: noop$2, - point: centroidPoint, - lineStart: centroidLineStart, - lineEnd: centroidLineEnd, - polygonStart: function() { - centroidStream.lineStart = centroidRingStart; - centroidStream.lineEnd = centroidRingEnd; - }, - polygonEnd: function() { - centroidStream.lineStart = centroidLineStart; - centroidStream.lineEnd = centroidLineEnd; - } + return area; }; -// Arithmetic mean of Cartesian vectors. -function centroidPoint(lambda, phi) { - lambda *= radians, phi *= radians; - var cosPhi = cos$1(phi); - centroidPointCartesian(cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)); -} - -function centroidPointCartesian(x, y, z) { - ++W0; - X0 += (x - X0) / W0; - Y0 += (y - Y0) / W0; - Z0 += (z - Z0) / W0; -} - -function centroidLineStart() { - centroidStream.point = centroidLinePointFirst; -} - -function centroidLinePointFirst(lambda, phi) { - lambda *= radians, phi *= radians; - var cosPhi = cos$1(phi); - x0 = cosPhi * cos$1(lambda); - y0 = cosPhi * sin$1(lambda); - z0 = sin$1(phi); - centroidStream.point = centroidLinePoint; - centroidPointCartesian(x0, y0, z0); -} - -function centroidLinePoint(lambda, phi) { - lambda *= radians, phi *= radians; - var cosPhi = cos$1(phi), - x = cosPhi * cos$1(lambda), - y = cosPhi * sin$1(lambda), - z = sin$1(phi), - w = atan2(sqrt$1((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z); - W1 += w; - X1 += w * (x0 + (x0 = x)); - Y1 += w * (y0 + (y0 = y)); - Z1 += w * (z0 + (z0 = z)); - centroidPointCartesian(x0, y0, z0); -} - -function centroidLineEnd() { - centroidStream.point = centroidPoint; -} +var descending$1 = function(a, b) { + return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN; +}; -// See J. E. Brock, The Inertia Tensor for a Spherical Triangle, -// J. Applied Mechanics 42, 239 (1975). -function centroidRingStart() { - centroidStream.point = centroidRingPointFirst; -} +var identity$7 = function(d) { + return d; +}; -function centroidRingEnd() { - centroidRingPoint(lambda00$2, phi00$2); - centroidStream.point = centroidPoint; -} +var pie = function() { + var value = identity$7, + sortValues = descending$1, + sort = null, + startAngle = constant$10(0), + endAngle = constant$10(tau$4), + padAngle = constant$10(0); -function centroidRingPointFirst(lambda, phi) { - lambda00$2 = lambda, phi00$2 = phi; - lambda *= radians, phi *= radians; - centroidStream.point = centroidRingPoint; - var cosPhi = cos$1(phi); - x0 = cosPhi * cos$1(lambda); - y0 = cosPhi * sin$1(lambda); - z0 = sin$1(phi); - centroidPointCartesian(x0, y0, z0); -} + function pie(data) { + var i, + n = data.length, + j, + k, + sum = 0, + index = new Array(n), + arcs = new Array(n), + a0 = +startAngle.apply(this, arguments), + da = Math.min(tau$4, Math.max(-tau$4, endAngle.apply(this, arguments) - a0)), + a1, + p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)), + pa = p * (da < 0 ? -1 : 1), + v; -function centroidRingPoint(lambda, phi) { - lambda *= radians, phi *= radians; - var cosPhi = cos$1(phi), - x = cosPhi * cos$1(lambda), - y = cosPhi * sin$1(lambda), - z = sin$1(phi), - cx = y0 * z - z0 * y, - cy = z0 * x - x0 * z, - cz = x0 * y - y0 * x, - m = sqrt$1(cx * cx + cy * cy + cz * cz), - u = x0 * x + y0 * y + z0 * z, - v = m && -acos(u) / m, // area weight - w = atan2(m, u); // line weight - X2 += v * cx; - Y2 += v * cy; - Z2 += v * cz; - W1 += w; - X1 += w * (x0 + (x0 = x)); - Y1 += w * (y0 + (y0 = y)); - Z1 += w * (z0 + (z0 = z)); - centroidPointCartesian(x0, y0, z0); -} + for (i = 0; i < n; ++i) { + if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) { + sum += v; + } + } -var centroid$1 = function(object) { - W0 = W1 = - X0 = Y0 = Z0 = - X1 = Y1 = Z1 = - X2 = Y2 = Z2 = 0; - geoStream(object, centroidStream); + // Optionally sort the arcs by previously-computed values or by data. + if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); }); + else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); }); - var x = X2, - y = Y2, - z = Z2, - m = x * x + y * y + z * z; + // Compute the arcs! They are stored in the original data's order. + for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) { + j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = { + data: data[j], + index: i, + value: v, + startAngle: a0, + endAngle: a1, + padAngle: p + }; + } - // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid. - if (m < epsilon2$2) { - x = X1, y = Y1, z = Z1; - // If the feature has zero length, fall back to arithmetic mean of point vectors. - if (W1 < epsilon$4) x = X0, y = Y0, z = Z0; - m = x * x + y * y + z * z; - // If the feature still has an undefined ccentroid, then return. - if (m < epsilon2$2) return [NaN, NaN]; + return arcs; } - return [atan2(y, x) * degrees$1, asin$1(z / sqrt$1(m)) * degrees$1]; -}; + pie.value = function(_) { + return arguments.length ? (value = typeof _ === "function" ? _ : constant$10(+_), pie) : value; + }; + + pie.sortValues = function(_) { + return arguments.length ? (sortValues = _, sort = null, pie) : sortValues; + }; -var constant$13 = function(x) { - return function() { - return x; + pie.sort = function(_) { + return arguments.length ? (sort = _, sortValues = null, pie) : sort; }; -}; -var compose = function(a, b) { + pie.startAngle = function(_) { + return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : startAngle; + }; - function compose(x, y) { - return x = a(x, y), b(x[0], x[1]); - } + pie.endAngle = function(_) { + return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : endAngle; + }; - if (a.invert && b.invert) compose.invert = function(x, y) { - return x = b.invert(x, y), x && a.invert(x[0], x[1]); + pie.padAngle = function(_) { + return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : padAngle; }; - return compose; + return pie; }; -function rotationIdentity(lambda, phi) { - return [lambda > pi$4 ? lambda - tau$4 : lambda < -pi$4 ? lambda + tau$4 : lambda, phi]; +var curveRadialLinear = curveRadial(curveLinear); + +function Radial(curve) { + this._curve = curve; } -rotationIdentity.invert = rotationIdentity; +Radial.prototype = { + areaStart: function() { + this._curve.areaStart(); + }, + areaEnd: function() { + this._curve.areaEnd(); + }, + lineStart: function() { + this._curve.lineStart(); + }, + lineEnd: function() { + this._curve.lineEnd(); + }, + point: function(a, r) { + this._curve.point(r * Math.sin(a), r * -Math.cos(a)); + } +}; -function rotateRadians(deltaLambda, deltaPhi, deltaGamma) { - return (deltaLambda %= tau$4) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma)) - : rotationLambda(deltaLambda)) - : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma) - : rotationIdentity); +function curveRadial(curve) { + + function radial(context) { + return new Radial(curve(context)); + } + + radial._curve = curve; + + return radial; } -function forwardRotationLambda(deltaLambda) { - return function(lambda, phi) { - return lambda += deltaLambda, [lambda > pi$4 ? lambda - tau$4 : lambda < -pi$4 ? lambda + tau$4 : lambda, phi]; +function radialLine(l) { + var c = l.curve; + + l.angle = l.x, delete l.x; + l.radius = l.y, delete l.y; + + l.curve = function(_) { + return arguments.length ? c(curveRadial(_)) : c()._curve; }; -} -function rotationLambda(deltaLambda) { - var rotation = forwardRotationLambda(deltaLambda); - rotation.invert = forwardRotationLambda(-deltaLambda); - return rotation; + return l; } -function rotationPhiGamma(deltaPhi, deltaGamma) { - var cosDeltaPhi = cos$1(deltaPhi), - sinDeltaPhi = sin$1(deltaPhi), - cosDeltaGamma = cos$1(deltaGamma), - sinDeltaGamma = sin$1(deltaGamma); +var radialLine$1 = function() { + return radialLine(line().curve(curveRadialLinear)); +}; - function rotation(lambda, phi) { - var cosPhi = cos$1(phi), - x = cos$1(lambda) * cosPhi, - y = sin$1(lambda) * cosPhi, - z = sin$1(phi), - k = z * cosDeltaPhi + x * sinDeltaPhi; - return [ - atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi), - asin$1(k * cosDeltaGamma + y * sinDeltaGamma) - ]; - } +var radialArea = function() { + var a = area$2().curve(curveRadialLinear), + c = a.curve, + x0 = a.lineX0, + x1 = a.lineX1, + y0 = a.lineY0, + y1 = a.lineY1; - rotation.invert = function(lambda, phi) { - var cosPhi = cos$1(phi), - x = cos$1(lambda) * cosPhi, - y = sin$1(lambda) * cosPhi, - z = sin$1(phi), - k = z * cosDeltaGamma - y * sinDeltaGamma; - return [ - atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi), - asin$1(k * cosDeltaPhi - x * sinDeltaPhi) - ]; + a.angle = a.x, delete a.x; + a.startAngle = a.x0, delete a.x0; + a.endAngle = a.x1, delete a.x1; + a.radius = a.y, delete a.y; + a.innerRadius = a.y0, delete a.y0; + a.outerRadius = a.y1, delete a.y1; + a.lineStartAngle = function() { return radialLine(x0()); }, delete a.lineX0; + a.lineEndAngle = function() { return radialLine(x1()); }, delete a.lineX1; + a.lineInnerRadius = function() { return radialLine(y0()); }, delete a.lineY0; + a.lineOuterRadius = function() { return radialLine(y1()); }, delete a.lineY1; + + a.curve = function(_) { + return arguments.length ? c(curveRadial(_)) : c()._curve; }; - return rotation; -} + return a; +}; -var rotation = function(rotate) { - rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0); +var circle$2 = { + draw: function(context, size) { + var r = Math.sqrt(size / pi$4); + context.moveTo(r, 0); + context.arc(0, 0, r, 0, tau$4); + } +}; - function forward(coordinates) { - coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians); - return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates; +var cross$2 = { + draw: function(context, size) { + var r = Math.sqrt(size / 5) / 2; + context.moveTo(-3 * r, -r); + context.lineTo(-r, -r); + context.lineTo(-r, -3 * r); + context.lineTo(r, -3 * r); + context.lineTo(r, -r); + context.lineTo(3 * r, -r); + context.lineTo(3 * r, r); + context.lineTo(r, r); + context.lineTo(r, 3 * r); + context.lineTo(-r, 3 * r); + context.lineTo(-r, r); + context.lineTo(-3 * r, r); + context.closePath(); } +}; - forward.invert = function(coordinates) { - coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians); - return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates; - }; +var tan30 = Math.sqrt(1 / 3); +var tan30_2 = tan30 * 2; - return forward; +var diamond = { + draw: function(context, size) { + var y = Math.sqrt(size / tan30_2), + x = y * tan30; + context.moveTo(0, -y); + context.lineTo(x, 0); + context.lineTo(0, y); + context.lineTo(-x, 0); + context.closePath(); + } }; -// Generates a circle centered at [0°, 0°], with a given radius and precision. -function circleStream(stream, radius, delta, direction, t0, t1) { - if (!delta) return; - var cosRadius = cos$1(radius), - sinRadius = sin$1(radius), - step = direction * delta; - if (t0 == null) { - t0 = radius + direction * tau$4; - t1 = radius - step / 2; - } else { - t0 = circleRadius(cosRadius, t0); - t1 = circleRadius(cosRadius, t1); - if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau$4; +var ka = 0.89081309152928522810; +var kr = Math.sin(pi$4 / 10) / Math.sin(7 * pi$4 / 10); +var kx = Math.sin(tau$4 / 10) * kr; +var ky = -Math.cos(tau$4 / 10) * kr; + +var star = { + draw: function(context, size) { + var r = Math.sqrt(size * ka), + x = kx * r, + y = ky * r; + context.moveTo(0, -r); + context.lineTo(x, y); + for (var i = 1; i < 5; ++i) { + var a = tau$4 * i / 5, + c = Math.cos(a), + s = Math.sin(a); + context.lineTo(s * r, -c * r); + context.lineTo(c * x - s * y, s * x + c * y); + } + context.closePath(); } - for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) { - point = spherical([cosRadius, -sinRadius * cos$1(t), -sinRadius * sin$1(t)]); - stream.point(point[0], point[1]); +}; + +var square = { + draw: function(context, size) { + var w = Math.sqrt(size), + x = -w / 2; + context.rect(x, x, w, w); } -} +}; -// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0]. -function circleRadius(cosRadius, point) { - point = cartesian(point), point[0] -= cosRadius; - cartesianNormalizeInPlace(point); - var radius = acos(-point[1]); - return ((-point[2] < 0 ? -radius : radius) + tau$4 - epsilon$4) % tau$4; -} +var sqrt3 = Math.sqrt(3); -var circle$1 = function() { - var center = constant$13([0, 0]), - radius = constant$13(90), - precision = constant$13(6), - ring, - rotate, - stream = {point: point}; +var triangle = { + draw: function(context, size) { + var y = -Math.sqrt(size / (sqrt3 * 3)); + context.moveTo(0, y * 2); + context.lineTo(-sqrt3 * y, -y); + context.lineTo(sqrt3 * y, -y); + context.closePath(); + } +}; + +var c = -0.5; +var s = Math.sqrt(3) / 2; +var k = 1 / Math.sqrt(12); +var a = (k / 2 + 1) * 3; + +var wye = { + draw: function(context, size) { + var r = Math.sqrt(size / a), + x0 = r / 2, + y0 = r * k, + x1 = x0, + y1 = r * k + r, + x2 = -x1, + y2 = y1; + context.moveTo(x0, y0); + context.lineTo(x1, y1); + context.lineTo(x2, y2); + context.lineTo(c * x0 - s * y0, s * x0 + c * y0); + context.lineTo(c * x1 - s * y1, s * x1 + c * y1); + context.lineTo(c * x2 - s * y2, s * x2 + c * y2); + context.lineTo(c * x0 + s * y0, c * y0 - s * x0); + context.lineTo(c * x1 + s * y1, c * y1 - s * x1); + context.lineTo(c * x2 + s * y2, c * y2 - s * x2); + context.closePath(); + } +}; + +var symbols = [ + circle$2, + cross$2, + diamond, + square, + star, + triangle, + wye +]; - function point(x, y) { - ring.push(x = rotate(x, y)); - x[0] *= degrees$1, x[1] *= degrees$1; - } +var symbol = function() { + var type = constant$10(circle$2), + size = constant$10(64), + context = null; - function circle() { - var c = center.apply(this, arguments), - r = radius.apply(this, arguments) * radians, - p = precision.apply(this, arguments) * radians; - ring = []; - rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert; - circleStream(stream, r, p, 1); - c = {type: "Polygon", coordinates: [ring]}; - ring = rotate = null; - return c; + function symbol() { + var buffer; + if (!context) context = buffer = path(); + type.apply(this, arguments).draw(context, +size.apply(this, arguments)); + if (buffer) return context = null, buffer + "" || null; } - circle.center = function(_) { - return arguments.length ? (center = typeof _ === "function" ? _ : constant$13([+_[0], +_[1]]), circle) : center; + symbol.type = function(_) { + return arguments.length ? (type = typeof _ === "function" ? _ : constant$10(_), symbol) : type; }; - circle.radius = function(_) { - return arguments.length ? (radius = typeof _ === "function" ? _ : constant$13(+_), circle) : radius; + symbol.size = function(_) { + return arguments.length ? (size = typeof _ === "function" ? _ : constant$10(+_), symbol) : size; }; - circle.precision = function(_) { - return arguments.length ? (precision = typeof _ === "function" ? _ : constant$13(+_), circle) : precision; + symbol.context = function(_) { + return arguments.length ? (context = _ == null ? null : _, symbol) : context; }; - return circle; -}; - -var clipBuffer = function() { - var lines = [], - line; - return { - point: function(x, y) { - line.push([x, y]); - }, - lineStart: function() { - lines.push(line = []); - }, - lineEnd: noop$2, - rejoin: function() { - if (lines.length > 1) lines.push(lines.pop().concat(lines.shift())); - }, - result: function() { - var result = lines; - lines = []; - line = null; - return result; - } - }; + return symbol; }; -var clipLine = function(a, b, x0, y0, x1, y1) { - var ax = a[0], - ay = a[1], - bx = b[0], - by = b[1], - t0 = 0, - t1 = 1, - dx = bx - ax, - dy = by - ay, - r; - - r = x0 - ax; - if (!dx && r > 0) return; - r /= dx; - if (dx < 0) { - if (r < t0) return; - if (r < t1) t1 = r; - } else if (dx > 0) { - if (r > t1) return; - if (r > t0) t0 = r; - } +var noop$2 = function() {}; - r = x1 - ax; - if (!dx && r < 0) return; - r /= dx; - if (dx < 0) { - if (r > t1) return; - if (r > t0) t0 = r; - } else if (dx > 0) { - if (r < t0) return; - if (r < t1) t1 = r; - } +function point$2(that, x, y) { + that._context.bezierCurveTo( + (2 * that._x0 + that._x1) / 3, + (2 * that._y0 + that._y1) / 3, + (that._x0 + 2 * that._x1) / 3, + (that._y0 + 2 * that._y1) / 3, + (that._x0 + 4 * that._x1 + x) / 6, + (that._y0 + 4 * that._y1 + y) / 6 + ); +} - r = y0 - ay; - if (!dy && r > 0) return; - r /= dy; - if (dy < 0) { - if (r < t0) return; - if (r < t1) t1 = r; - } else if (dy > 0) { - if (r > t1) return; - if (r > t0) t0 = r; - } +function Basis(context) { + this._context = context; +} - r = y1 - ay; - if (!dy && r < 0) return; - r /= dy; - if (dy < 0) { - if (r > t1) return; - if (r > t0) t0 = r; - } else if (dy > 0) { - if (r < t0) return; - if (r < t1) t1 = r; +Basis.prototype = { + areaStart: function() { + this._line = 0; + }, + areaEnd: function() { + this._line = NaN; + }, + lineStart: function() { + this._x0 = this._x1 = + this._y0 = this._y1 = NaN; + this._point = 0; + }, + lineEnd: function() { + switch (this._point) { + case 3: point$2(this, this._x1, this._y1); // proceed + case 2: this._context.lineTo(this._x1, this._y1); break; + } + if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); + this._line = 1 - this._line; + }, + point: function(x, y) { + x = +x, y = +y; + switch (this._point) { + case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; + case 1: this._point = 2; break; + case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed + default: point$2(this, x, y); break; + } + this._x0 = this._x1, this._x1 = x; + this._y0 = this._y1, this._y1 = y; } - - if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy; - if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy; - return true; }; -var pointEqual = function(a, b) { - return abs(a[0] - b[0]) < epsilon$4 && abs(a[1] - b[1]) < epsilon$4; +var basis$2 = function(context) { + return new Basis(context); }; -function Intersection(point, points, other, entry) { - this.x = point; - this.z = points; - this.o = other; // another intersection - this.e = entry; // is an entry? - this.v = false; // visited - this.n = this.p = null; // next & previous +function BasisClosed(context) { + this._context = context; } -// A generalized polygon clipping algorithm: given a polygon that has been cut -// into its visible line segments, and rejoins the segments by interpolating -// along the clip edge. -var clipPolygon = function(segments, compareIntersection, startInside, interpolate, stream) { - var subject = [], - clip = [], - i, - n; - - segments.forEach(function(segment) { - if ((n = segment.length - 1) <= 0) return; - var n, p0 = segment[0], p1 = segment[n], x; - - // If the first and last points of a segment are coincident, then treat as a - // closed ring. TODO if all rings are closed, then the winding order of the - // exterior ring should be checked. - if (pointEqual(p0, p1)) { - stream.lineStart(); - for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]); - stream.lineEnd(); - return; - } - - subject.push(x = new Intersection(p0, segment, null, true)); - clip.push(x.o = new Intersection(p0, null, x, false)); - subject.push(x = new Intersection(p1, segment, null, false)); - clip.push(x.o = new Intersection(p1, null, x, true)); - }); - - if (!subject.length) return; - - clip.sort(compareIntersection); - link$1(subject); - link$1(clip); - - for (i = 0, n = clip.length; i < n; ++i) { - clip[i].e = startInside = !startInside; - } - - var start = subject[0], - points, - point; - - while (1) { - // Find first unvisited intersection. - var current = start, - isSubject = true; - while (current.v) if ((current = current.n) === start) return; - points = current.z; - stream.lineStart(); - do { - current.v = current.o.v = true; - if (current.e) { - if (isSubject) { - for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]); - } else { - interpolate(current.x, current.n.x, 1, stream); - } - current = current.n; - } else { - if (isSubject) { - points = current.p.z; - for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]); - } else { - interpolate(current.x, current.p.x, -1, stream); - } - current = current.p; +BasisClosed.prototype = { + areaStart: noop$2, + areaEnd: noop$2, + lineStart: function() { + this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = + this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN; + this._point = 0; + }, + lineEnd: function() { + switch (this._point) { + case 1: { + this._context.moveTo(this._x2, this._y2); + this._context.closePath(); + break; } - current = current.o; - points = current.z; - isSubject = !isSubject; - } while (!current.v); - stream.lineEnd(); + case 2: { + this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3); + this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3); + this._context.closePath(); + break; + } + case 3: { + this.point(this._x2, this._y2); + this.point(this._x3, this._y3); + this.point(this._x4, this._y4); + break; + } + } + }, + point: function(x, y) { + x = +x, y = +y; + switch (this._point) { + case 0: this._point = 1; this._x2 = x, this._y2 = y; break; + case 1: this._point = 2; this._x3 = x, this._y3 = y; break; + case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break; + default: point$2(this, x, y); break; + } + this._x0 = this._x1, this._x1 = x; + this._y0 = this._y1, this._y1 = y; } }; -function link$1(array) { - if (!(n = array.length)) return; - var n, - i = 0, - a = array[0], - b; - while (++i < n) { - a.n = b = array[i]; - b.p = a; - a = b; - } - a.n = b = array[0]; - b.p = a; -} - -var clipMax = 1e9; -var clipMin = -clipMax; - -// TODO Use d3-polygon’s polygonContains here for the ring check? -// TODO Eliminate duplicate buffering in clipBuffer and polygon.push? - -function clipExtent(x0, y0, x1, y1) { +var basisClosed$1 = function(context) { + return new BasisClosed(context); +}; - function visible(x, y) { - return x0 <= x && x <= x1 && y0 <= y && y <= y1; - } +function BasisOpen(context) { + this._context = context; +} - function interpolate(from, to, direction, stream) { - var a = 0, a1 = 0; - if (from == null - || (a = corner(from, direction)) !== (a1 = corner(to, direction)) - || comparePoint(from, to) < 0 ^ direction > 0) { - do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0); - while ((a = (a + direction + 4) % 4) !== a1); - } else { - stream.point(to[0], to[1]); +BasisOpen.prototype = { + areaStart: function() { + this._line = 0; + }, + areaEnd: function() { + this._line = NaN; + }, + lineStart: function() { + this._x0 = this._x1 = + this._y0 = this._y1 = NaN; + this._point = 0; + }, + lineEnd: function() { + if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath(); + this._line = 1 - this._line; + }, + point: function(x, y) { + x = +x, y = +y; + switch (this._point) { + case 0: this._point = 1; break; + case 1: this._point = 2; break; + case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break; + case 3: this._point = 4; // proceed + default: point$2(this, x, y); break; } + this._x0 = this._x1, this._x1 = x; + this._y0 = this._y1, this._y1 = y; } +}; - function corner(p, direction) { - return abs(p[0] - x0) < epsilon$4 ? direction > 0 ? 0 : 3 - : abs(p[0] - x1) < epsilon$4 ? direction > 0 ? 2 : 1 - : abs(p[1] - y0) < epsilon$4 ? direction > 0 ? 1 : 0 - : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon - } - - function compareIntersection(a, b) { - return comparePoint(a.x, b.x); - } +var basisOpen = function(context) { + return new BasisOpen(context); +}; - function comparePoint(a, b) { - var ca = corner(a, 1), - cb = corner(b, 1); - return ca !== cb ? ca - cb - : ca === 0 ? b[1] - a[1] - : ca === 1 ? a[0] - b[0] - : ca === 2 ? a[1] - b[1] - : b[0] - a[0]; - } +function Bundle(context, beta) { + this._basis = new Basis(context); + this._beta = beta; +} - return function(stream) { - var activeStream = stream, - bufferStream = clipBuffer(), - segments, - polygon, - ring, - x__, y__, v__, // first point - x_, y_, v_, // previous point - first, - clean; +Bundle.prototype = { + lineStart: function() { + this._x = []; + this._y = []; + this._basis.lineStart(); + }, + lineEnd: function() { + var x = this._x, + y = this._y, + j = x.length - 1; - var clipStream = { - point: point, - lineStart: lineStart, - lineEnd: lineEnd, - polygonStart: polygonStart, - polygonEnd: polygonEnd - }; + if (j > 0) { + var x0 = x[0], + y0 = y[0], + dx = x[j] - x0, + dy = y[j] - y0, + i = -1, + t; - function point(x, y) { - if (visible(x, y)) activeStream.point(x, y); + while (++i <= j) { + t = i / j; + this._basis.point( + this._beta * x[i] + (1 - this._beta) * (x0 + t * dx), + this._beta * y[i] + (1 - this._beta) * (y0 + t * dy) + ); + } } - function polygonInside() { - var winding = 0; + this._x = this._y = null; + this._basis.lineEnd(); + }, + point: function(x, y) { + this._x.push(+x); + this._y.push(+y); + } +}; - for (var i = 0, n = polygon.length; i < n; ++i) { - for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) { - a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1]; - if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; } - else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; } - } - } +var bundle = ((function custom(beta) { - return winding; - } + function bundle(context) { + return beta === 1 ? new Basis(context) : new Bundle(context, beta); + } - // Buffer geometry within a polygon and then clip it en masse. - function polygonStart() { - activeStream = bufferStream, segments = [], polygon = [], clean = true; - } + bundle.beta = function(beta) { + return custom(+beta); + }; - function polygonEnd() { - var startInside = polygonInside(), - cleanInside = clean && startInside, - visible = (segments = merge(segments)).length; - if (cleanInside || visible) { - stream.polygonStart(); - if (cleanInside) { - stream.lineStart(); - interpolate(null, null, 1, stream); - stream.lineEnd(); - } - if (visible) { - clipPolygon(segments, compareIntersection, startInside, interpolate, stream); - } - stream.polygonEnd(); - } - activeStream = stream, segments = polygon = ring = null; - } + return bundle; +}))(0.85); - function lineStart() { - clipStream.point = linePoint; - if (polygon) polygon.push(ring = []); - first = true; - v_ = false; - x_ = y_ = NaN; - } +function point$3(that, x, y) { + that._context.bezierCurveTo( + that._x1 + that._k * (that._x2 - that._x0), + that._y1 + that._k * (that._y2 - that._y0), + that._x2 + that._k * (that._x1 - x), + that._y2 + that._k * (that._y1 - y), + that._x2, + that._y2 + ); +} - // TODO rather than special-case polygons, simply handle them separately. - // Ideally, coincident intersection points should be jittered to avoid - // clipping issues. - function lineEnd() { - if (segments) { - linePoint(x__, y__); - if (v__ && v_) bufferStream.rejoin(); - segments.push(bufferStream.result()); - } - clipStream.point = point; - if (v_) activeStream.lineEnd(); - } +function Cardinal(context, tension) { + this._context = context; + this._k = (1 - tension) / 6; +} - function linePoint(x, y) { - var v = visible(x, y); - if (polygon) ring.push([x, y]); - if (first) { - x__ = x, y__ = y, v__ = v; - first = false; - if (v) { - activeStream.lineStart(); - activeStream.point(x, y); - } - } else { - if (v && v_) activeStream.point(x, y); - else { - var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))], - b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))]; - if (clipLine(a, b, x0, y0, x1, y1)) { - if (!v_) { - activeStream.lineStart(); - activeStream.point(a[0], a[1]); - } - activeStream.point(b[0], b[1]); - if (!v) activeStream.lineEnd(); - clean = false; - } else if (v) { - activeStream.lineStart(); - activeStream.point(x, y); - clean = false; - } - } - } - x_ = x, y_ = y, v_ = v; +Cardinal.prototype = { + areaStart: function() { + this._line = 0; + }, + areaEnd: function() { + this._line = NaN; + }, + lineStart: function() { + this._x0 = this._x1 = this._x2 = + this._y0 = this._y1 = this._y2 = NaN; + this._point = 0; + }, + lineEnd: function() { + switch (this._point) { + case 2: this._context.lineTo(this._x2, this._y2); break; + case 3: point$3(this, this._x1, this._y1); break; + } + if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); + this._line = 1 - this._line; + }, + point: function(x, y) { + x = +x, y = +y; + switch (this._point) { + case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; + case 1: this._point = 2; this._x1 = x, this._y1 = y; break; + case 2: this._point = 3; // proceed + default: point$3(this, x, y); break; } + this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; + this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; + } +}; - return clipStream; - }; -} +var cardinal = ((function custom(tension) { -var extent$1 = function() { - var x0 = 0, - y0 = 0, - x1 = 960, - y1 = 500, - cache, - cacheStream, - clip; + function cardinal(context) { + return new Cardinal(context, tension); + } - return clip = { - stream: function(stream) { - return cache && cacheStream === stream ? cache : cache = clipExtent(x0, y0, x1, y1)(cacheStream = stream); - }, - extent: function(_) { - return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]]; - } + cardinal.tension = function(tension) { + return custom(+tension); }; -}; -var lengthSum = adder(); -var lambda0$2; -var sinPhi0$1; -var cosPhi0$1; + return cardinal; +}))(0); -var lengthStream = { - sphere: noop$2, - point: noop$2, - lineStart: lengthLineStart, - lineEnd: noop$2, - polygonStart: noop$2, - polygonEnd: noop$2 +function CardinalClosed(context, tension) { + this._context = context; + this._k = (1 - tension) / 6; +} + +CardinalClosed.prototype = { + areaStart: noop$2, + areaEnd: noop$2, + lineStart: function() { + this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 = + this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN; + this._point = 0; + }, + lineEnd: function() { + switch (this._point) { + case 1: { + this._context.moveTo(this._x3, this._y3); + this._context.closePath(); + break; + } + case 2: { + this._context.lineTo(this._x3, this._y3); + this._context.closePath(); + break; + } + case 3: { + this.point(this._x3, this._y3); + this.point(this._x4, this._y4); + this.point(this._x5, this._y5); + break; + } + } + }, + point: function(x, y) { + x = +x, y = +y; + switch (this._point) { + case 0: this._point = 1; this._x3 = x, this._y3 = y; break; + case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break; + case 2: this._point = 3; this._x5 = x, this._y5 = y; break; + default: point$3(this, x, y); break; + } + this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; + this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; + } }; -function lengthLineStart() { - lengthStream.point = lengthPointFirst; - lengthStream.lineEnd = lengthLineEnd; -} +var cardinalClosed = ((function custom(tension) { -function lengthLineEnd() { - lengthStream.point = lengthStream.lineEnd = noop$2; -} + function cardinal(context) { + return new CardinalClosed(context, tension); + } -function lengthPointFirst(lambda, phi) { - lambda *= radians, phi *= radians; - lambda0$2 = lambda, sinPhi0$1 = sin$1(phi), cosPhi0$1 = cos$1(phi); - lengthStream.point = lengthPoint; -} + cardinal.tension = function(tension) { + return custom(+tension); + }; -function lengthPoint(lambda, phi) { - lambda *= radians, phi *= radians; - var sinPhi = sin$1(phi), - cosPhi = cos$1(phi), - delta = abs(lambda - lambda0$2), - cosDelta = cos$1(delta), - sinDelta = sin$1(delta), - x = cosPhi * sinDelta, - y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta, - z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta; - lengthSum.add(atan2(sqrt$1(x * x + y * y), z)); - lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi; + return cardinal; +}))(0); + +function CardinalOpen(context, tension) { + this._context = context; + this._k = (1 - tension) / 6; } -var length$2 = function(object) { - lengthSum.reset(); - geoStream(object, lengthStream); - return +lengthSum; +CardinalOpen.prototype = { + areaStart: function() { + this._line = 0; + }, + areaEnd: function() { + this._line = NaN; + }, + lineStart: function() { + this._x0 = this._x1 = this._x2 = + this._y0 = this._y1 = this._y2 = NaN; + this._point = 0; + }, + lineEnd: function() { + if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath(); + this._line = 1 - this._line; + }, + point: function(x, y) { + x = +x, y = +y; + switch (this._point) { + case 0: this._point = 1; break; + case 1: this._point = 2; break; + case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break; + case 3: this._point = 4; // proceed + default: point$3(this, x, y); break; + } + this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; + this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; + } }; -var coordinates = [null, null]; -var object$1 = {type: "LineString", coordinates: coordinates}; +var cardinalOpen = ((function custom(tension) { -var distance = function(a, b) { - coordinates[0] = a; - coordinates[1] = b; - return length$2(object$1); -}; + function cardinal(context) { + return new CardinalOpen(context, tension); + } -function graticuleX(y0, y1, dy) { - var y = range(y0, y1 - epsilon$4, dy).concat(y1); - return function(x) { return y.map(function(y) { return [x, y]; }); }; -} + cardinal.tension = function(tension) { + return custom(+tension); + }; -function graticuleY(x0, x1, dx) { - var x = range(x0, x1 - epsilon$4, dx).concat(x1); - return function(y) { return x.map(function(x) { return [x, y]; }); }; -} + return cardinal; +}))(0); -function graticule() { - var x1, x0, X1, X0, - y1, y0, Y1, Y0, - dx = 10, dy = dx, DX = 90, DY = 360, - x, y, X, Y, - precision = 2.5; +function point$4(that, x, y) { + var x1 = that._x1, + y1 = that._y1, + x2 = that._x2, + y2 = that._y2; - function graticule() { - return {type: "MultiLineString", coordinates: lines()}; + if (that._l01_a > epsilon$3) { + var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a, + n = 3 * that._l01_a * (that._l01_a + that._l12_a); + x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n; + y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n; } - function lines() { - return range(ceil(X0 / DX) * DX, X1, DX).map(X) - .concat(range(ceil(Y0 / DY) * DY, Y1, DY).map(Y)) - .concat(range(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs(x % DX) > epsilon$4; }).map(x)) - .concat(range(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs(y % DY) > epsilon$4; }).map(y)); + if (that._l23_a > epsilon$3) { + var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a, + m = 3 * that._l23_a * (that._l23_a + that._l12_a); + x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m; + y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m; } - graticule.lines = function() { - return lines().map(function(coordinates) { return {type: "LineString", coordinates: coordinates}; }); - }; - - graticule.outline = function() { - return { - type: "Polygon", - coordinates: [ - X(X0).concat( - Y(Y1).slice(1), - X(X1).reverse().slice(1), - Y(Y0).reverse().slice(1)) - ] - }; - }; + that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2); +} - graticule.extent = function(_) { - if (!arguments.length) return graticule.extentMinor(); - return graticule.extentMajor(_).extentMinor(_); - }; +function CatmullRom(context, alpha) { + this._context = context; + this._alpha = alpha; +} - graticule.extentMajor = function(_) { - if (!arguments.length) return [[X0, Y0], [X1, Y1]]; - X0 = +_[0][0], X1 = +_[1][0]; - Y0 = +_[0][1], Y1 = +_[1][1]; - if (X0 > X1) _ = X0, X0 = X1, X1 = _; - if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _; - return graticule.precision(precision); - }; +CatmullRom.prototype = { + areaStart: function() { + this._line = 0; + }, + areaEnd: function() { + this._line = NaN; + }, + lineStart: function() { + this._x0 = this._x1 = this._x2 = + this._y0 = this._y1 = this._y2 = NaN; + this._l01_a = this._l12_a = this._l23_a = + this._l01_2a = this._l12_2a = this._l23_2a = + this._point = 0; + }, + lineEnd: function() { + switch (this._point) { + case 2: this._context.lineTo(this._x2, this._y2); break; + case 3: this.point(this._x2, this._y2); break; + } + if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); + this._line = 1 - this._line; + }, + point: function(x, y) { + x = +x, y = +y; - graticule.extentMinor = function(_) { - if (!arguments.length) return [[x0, y0], [x1, y1]]; - x0 = +_[0][0], x1 = +_[1][0]; - y0 = +_[0][1], y1 = +_[1][1]; - if (x0 > x1) _ = x0, x0 = x1, x1 = _; - if (y0 > y1) _ = y0, y0 = y1, y1 = _; - return graticule.precision(precision); - }; + if (this._point) { + var x23 = this._x2 - x, + y23 = this._y2 - y; + this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha)); + } - graticule.step = function(_) { - if (!arguments.length) return graticule.stepMinor(); - return graticule.stepMajor(_).stepMinor(_); - }; + switch (this._point) { + case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; + case 1: this._point = 2; break; + case 2: this._point = 3; // proceed + default: point$4(this, x, y); break; + } - graticule.stepMajor = function(_) { - if (!arguments.length) return [DX, DY]; - DX = +_[0], DY = +_[1]; - return graticule; - }; + this._l01_a = this._l12_a, this._l12_a = this._l23_a; + this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a; + this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; + this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; + } +}; - graticule.stepMinor = function(_) { - if (!arguments.length) return [dx, dy]; - dx = +_[0], dy = +_[1]; - return graticule; - }; +var catmullRom = ((function custom(alpha) { - graticule.precision = function(_) { - if (!arguments.length) return precision; - precision = +_; - x = graticuleX(y0, y1, 90); - y = graticuleY(x0, x1, precision); - X = graticuleX(Y0, Y1, 90); - Y = graticuleY(X0, X1, precision); - return graticule; + function catmullRom(context) { + return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0); + } + + catmullRom.alpha = function(alpha) { + return custom(+alpha); }; - return graticule - .extentMajor([[-180, -90 + epsilon$4], [180, 90 - epsilon$4]]) - .extentMinor([[-180, -80 - epsilon$4], [180, 80 + epsilon$4]]); -} + return catmullRom; +}))(0.5); -function graticule10() { - return graticule()(); +function CatmullRomClosed(context, alpha) { + this._context = context; + this._alpha = alpha; } -var interpolate$2 = function(a, b) { - var x0 = a[0] * radians, - y0 = a[1] * radians, - x1 = b[0] * radians, - y1 = b[1] * radians, - cy0 = cos$1(y0), - sy0 = sin$1(y0), - cy1 = cos$1(y1), - sy1 = sin$1(y1), - kx0 = cy0 * cos$1(x0), - ky0 = cy0 * sin$1(x0), - kx1 = cy1 * cos$1(x1), - ky1 = cy1 * sin$1(x1), - d = 2 * asin$1(sqrt$1(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))), - k = sin$1(d); - - var interpolate = d ? function(t) { - var B = sin$1(t *= d) / k, - A = sin$1(d - t) / k, - x = A * kx0 + B * kx1, - y = A * ky0 + B * ky1, - z = A * sy0 + B * sy1; - return [ - atan2(y, x) * degrees$1, - atan2(z, sqrt$1(x * x + y * y)) * degrees$1 - ]; - } : function() { - return [x0 * degrees$1, y0 * degrees$1]; - }; +CatmullRomClosed.prototype = { + areaStart: noop$2, + areaEnd: noop$2, + lineStart: function() { + this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 = + this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN; + this._l01_a = this._l12_a = this._l23_a = + this._l01_2a = this._l12_2a = this._l23_2a = + this._point = 0; + }, + lineEnd: function() { + switch (this._point) { + case 1: { + this._context.moveTo(this._x3, this._y3); + this._context.closePath(); + break; + } + case 2: { + this._context.lineTo(this._x3, this._y3); + this._context.closePath(); + break; + } + case 3: { + this.point(this._x3, this._y3); + this.point(this._x4, this._y4); + this.point(this._x5, this._y5); + break; + } + } + }, + point: function(x, y) { + x = +x, y = +y; - interpolate.distance = d; + if (this._point) { + var x23 = this._x2 - x, + y23 = this._y2 - y; + this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha)); + } - return interpolate; -}; + switch (this._point) { + case 0: this._point = 1; this._x3 = x, this._y3 = y; break; + case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break; + case 2: this._point = 3; this._x5 = x, this._y5 = y; break; + default: point$4(this, x, y); break; + } -var identity$7 = function(x) { - return x; + this._l01_a = this._l12_a, this._l12_a = this._l23_a; + this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a; + this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; + this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; + } }; -var areaSum$1 = adder(); -var areaRingSum$1 = adder(); -var x00; -var y00; -var x0$1; -var y0$1; +var catmullRomClosed = ((function custom(alpha) { -var areaStream$1 = { - point: noop$2, - lineStart: noop$2, - lineEnd: noop$2, - polygonStart: function() { - areaStream$1.lineStart = areaRingStart$1; - areaStream$1.lineEnd = areaRingEnd$1; - }, - polygonEnd: function() { - areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$2; - areaSum$1.add(abs(areaRingSum$1)); - areaRingSum$1.reset(); - }, - result: function() { - var area = areaSum$1 / 2; - areaSum$1.reset(); - return area; + function catmullRom(context) { + return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0); } -}; -function areaRingStart$1() { - areaStream$1.point = areaPointFirst$1; -} + catmullRom.alpha = function(alpha) { + return custom(+alpha); + }; -function areaPointFirst$1(x, y) { - areaStream$1.point = areaPoint$1; - x00 = x0$1 = x, y00 = y0$1 = y; -} + return catmullRom; +}))(0.5); -function areaPoint$1(x, y) { - areaRingSum$1.add(y0$1 * x - x0$1 * y); - x0$1 = x, y0$1 = y; +function CatmullRomOpen(context, alpha) { + this._context = context; + this._alpha = alpha; } -function areaRingEnd$1() { - areaPoint$1(x00, y00); -} +CatmullRomOpen.prototype = { + areaStart: function() { + this._line = 0; + }, + areaEnd: function() { + this._line = NaN; + }, + lineStart: function() { + this._x0 = this._x1 = this._x2 = + this._y0 = this._y1 = this._y2 = NaN; + this._l01_a = this._l12_a = this._l23_a = + this._l01_2a = this._l12_2a = this._l23_2a = + this._point = 0; + }, + lineEnd: function() { + if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath(); + this._line = 1 - this._line; + }, + point: function(x, y) { + x = +x, y = +y; -var x0$2 = Infinity; -var y0$2 = x0$2; -var x1 = -x0$2; -var y1 = x1; + if (this._point) { + var x23 = this._x2 - x, + y23 = this._y2 - y; + this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha)); + } -var boundsStream$1 = { - point: boundsPoint$1, - lineStart: noop$2, - lineEnd: noop$2, - polygonStart: noop$2, - polygonEnd: noop$2, - result: function() { - var bounds = [[x0$2, y0$2], [x1, y1]]; - x1 = y1 = -(y0$2 = x0$2 = Infinity); - return bounds; + switch (this._point) { + case 0: this._point = 1; break; + case 1: this._point = 2; break; + case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break; + case 3: this._point = 4; // proceed + default: point$4(this, x, y); break; + } + + this._l01_a = this._l12_a, this._l12_a = this._l23_a; + this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a; + this._x0 = this._x1, this._x1 = this._x2, this._x2 = x; + this._y0 = this._y1, this._y1 = this._y2, this._y2 = y; } }; -function boundsPoint$1(x, y) { - if (x < x0$2) x0$2 = x; - if (x > x1) x1 = x; - if (y < y0$2) y0$2 = y; - if (y > y1) y1 = y; -} +var catmullRomOpen = ((function custom(alpha) { -// TODO Enforce positive area for exterior, negative area for interior? + function catmullRom(context) { + return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0); + } -var X0$1 = 0; -var Y0$1 = 0; -var Z0$1 = 0; -var X1$1 = 0; -var Y1$1 = 0; -var Z1$1 = 0; -var X2$1 = 0; -var Y2$1 = 0; -var Z2$1 = 0; -var x00$1; -var y00$1; -var x0$3; -var y0$3; + catmullRom.alpha = function(alpha) { + return custom(+alpha); + }; + + return catmullRom; +}))(0.5); + +function LinearClosed(context) { + this._context = context; +} -var centroidStream$1 = { - point: centroidPoint$1, - lineStart: centroidLineStart$1, - lineEnd: centroidLineEnd$1, - polygonStart: function() { - centroidStream$1.lineStart = centroidRingStart$1; - centroidStream$1.lineEnd = centroidRingEnd$1; +LinearClosed.prototype = { + areaStart: noop$2, + areaEnd: noop$2, + lineStart: function() { + this._point = 0; }, - polygonEnd: function() { - centroidStream$1.point = centroidPoint$1; - centroidStream$1.lineStart = centroidLineStart$1; - centroidStream$1.lineEnd = centroidLineEnd$1; + lineEnd: function() { + if (this._point) this._context.closePath(); }, - result: function() { - var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1] - : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1] - : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1] - : [NaN, NaN]; - X0$1 = Y0$1 = Z0$1 = - X1$1 = Y1$1 = Z1$1 = - X2$1 = Y2$1 = Z2$1 = 0; - return centroid; + point: function(x, y) { + x = +x, y = +y; + if (this._point) this._context.lineTo(x, y); + else this._point = 1, this._context.moveTo(x, y); } }; -function centroidPoint$1(x, y) { - X0$1 += x; - Y0$1 += y; - ++Z0$1; -} +var linearClosed = function(context) { + return new LinearClosed(context); +}; -function centroidLineStart$1() { - centroidStream$1.point = centroidPointFirstLine; +function sign$1(x) { + return x < 0 ? -1 : 1; } -function centroidPointFirstLine(x, y) { - centroidStream$1.point = centroidPointLine; - centroidPoint$1(x0$3 = x, y0$3 = y); +// Calculate the slopes of the tangents (Hermite-type interpolation) based on +// the following paper: Steffen, M. 1990. A Simple Method for Monotonic +// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO. +// NOV(II), P. 443, 1990. +function slope3(that, x2, y2) { + var h0 = that._x1 - that._x0, + h1 = x2 - that._x1, + s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0), + s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0), + p = (s0 * h1 + s1 * h0) / (h0 + h1); + return (sign$1(s0) + sign$1(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0; } -function centroidPointLine(x, y) { - var dx = x - x0$3, dy = y - y0$3, z = sqrt$1(dx * dx + dy * dy); - X1$1 += z * (x0$3 + x) / 2; - Y1$1 += z * (y0$3 + y) / 2; - Z1$1 += z; - centroidPoint$1(x0$3 = x, y0$3 = y); +// Calculate a one-sided slope. +function slope2(that, t) { + var h = that._x1 - that._x0; + return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t; } -function centroidLineEnd$1() { - centroidStream$1.point = centroidPoint$1; +// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations +// "you can express cubic Hermite interpolation in terms of cubic Bézier curves +// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1". +function point$5(that, t0, t1) { + var x0 = that._x0, + y0 = that._y0, + x1 = that._x1, + y1 = that._y1, + dx = (x1 - x0) / 3; + that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1); } -function centroidRingStart$1() { - centroidStream$1.point = centroidPointFirstRing; +function MonotoneX(context) { + this._context = context; } -function centroidRingEnd$1() { - centroidPointRing(x00$1, y00$1); +MonotoneX.prototype = { + areaStart: function() { + this._line = 0; + }, + areaEnd: function() { + this._line = NaN; + }, + lineStart: function() { + this._x0 = this._x1 = + this._y0 = this._y1 = + this._t0 = NaN; + this._point = 0; + }, + lineEnd: function() { + switch (this._point) { + case 2: this._context.lineTo(this._x1, this._y1); break; + case 3: point$5(this, this._t0, slope2(this, this._t0)); break; + } + if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); + this._line = 1 - this._line; + }, + point: function(x, y) { + var t1 = NaN; + + x = +x, y = +y; + if (x === this._x1 && y === this._y1) return; // Ignore coincident points. + switch (this._point) { + case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; + case 1: this._point = 2; break; + case 2: this._point = 3; point$5(this, slope2(this, t1 = slope3(this, x, y)), t1); break; + default: point$5(this, this._t0, t1 = slope3(this, x, y)); break; + } + + this._x0 = this._x1, this._x1 = x; + this._y0 = this._y1, this._y1 = y; + this._t0 = t1; + } +}; + +function MonotoneY(context) { + this._context = new ReflectContext(context); } -function centroidPointFirstRing(x, y) { - centroidStream$1.point = centroidPointRing; - centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y); +(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) { + MonotoneX.prototype.point.call(this, y, x); +}; + +function ReflectContext(context) { + this._context = context; } -function centroidPointRing(x, y) { - var dx = x - x0$3, - dy = y - y0$3, - z = sqrt$1(dx * dx + dy * dy); +ReflectContext.prototype = { + moveTo: function(x, y) { this._context.moveTo(y, x); }, + closePath: function() { this._context.closePath(); }, + lineTo: function(x, y) { this._context.lineTo(y, x); }, + bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); } +}; - X1$1 += z * (x0$3 + x) / 2; - Y1$1 += z * (y0$3 + y) / 2; - Z1$1 += z; +function monotoneX(context) { + return new MonotoneX(context); +} - z = y0$3 * x - x0$3 * y; - X2$1 += z * (x0$3 + x); - Y2$1 += z * (y0$3 + y); - Z2$1 += z * 3; - centroidPoint$1(x0$3 = x, y0$3 = y); +function monotoneY(context) { + return new MonotoneY(context); } -function PathContext(context) { +function Natural(context) { this._context = context; } -PathContext.prototype = { - _radius: 4.5, - pointRadius: function(_) { - return this._radius = _, this; - }, - polygonStart: function() { +Natural.prototype = { + areaStart: function() { this._line = 0; }, - polygonEnd: function() { + areaEnd: function() { this._line = NaN; }, lineStart: function() { - this._point = 0; + this._x = []; + this._y = []; }, lineEnd: function() { - if (this._line === 0) this._context.closePath(); - this._point = NaN; - }, - point: function(x, y) { - switch (this._point) { - case 0: { - this._context.moveTo(x, y); - this._point = 1; - break; - } - case 1: { - this._context.lineTo(x, y); - break; - } - default: { - this._context.moveTo(x + this._radius, y); - this._context.arc(x, y, this._radius, 0, tau$4); - break; + var x = this._x, + y = this._y, + n = x.length; + + if (n) { + this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]); + if (n === 2) { + this._context.lineTo(x[1], y[1]); + } else { + var px = controlPoints(x), + py = controlPoints(y); + for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) { + this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]); + } } } + + if (this._line || (this._line !== 0 && n === 1)) this._context.closePath(); + this._line = 1 - this._line; + this._x = this._y = null; }, - result: noop$2 + point: function(x, y) { + this._x.push(+x); + this._y.push(+y); + } }; -function PathString() { - this._string = []; +// See https://www.particleincell.com/2012/bezier-splines/ for derivation. +function controlPoints(x) { + var i, + n = x.length - 1, + m, + a = new Array(n), + b = new Array(n), + r = new Array(n); + a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1]; + for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1]; + a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n]; + for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1]; + a[n - 1] = r[n - 1] / b[n - 1]; + for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i]; + b[n - 1] = (x[n] + a[n - 1]) / 2; + for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1]; + return [a, b]; } -PathString.prototype = { - _circle: circle$2(4.5), - pointRadius: function(_) { - return this._circle = circle$2(_), this; - }, - polygonStart: function() { +var natural = function(context) { + return new Natural(context); +}; + +function Step(context, t) { + this._context = context; + this._t = t; +} + +Step.prototype = { + areaStart: function() { this._line = 0; }, - polygonEnd: function() { + areaEnd: function() { this._line = NaN; }, lineStart: function() { + this._x = this._y = NaN; this._point = 0; }, - lineEnd: function() { - if (this._line === 0) this._string.push("Z"); - this._point = NaN; - }, - point: function(x, y) { - switch (this._point) { - case 0: { - this._string.push("M", x, ",", y); - this._point = 1; - break; - } - case 1: { - this._string.push("L", x, ",", y); - break; - } + lineEnd: function() { + if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y); + if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath(); + if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line; + }, + point: function(x, y) { + x = +x, y = +y; + switch (this._point) { + case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break; + case 1: this._point = 2; // proceed default: { - this._string.push("M", x, ",", y, this._circle); + if (this._t <= 0) { + this._context.lineTo(this._x, y); + this._context.lineTo(x, y); + } else { + var x1 = this._x * (1 - this._t) + x * this._t; + this._context.lineTo(x1, this._y); + this._context.lineTo(x1, y); + } break; } } - }, - result: function() { - if (this._string.length) { - var result = this._string.join(""); - this._string = []; - return result; - } + this._x = x, this._y = y; } }; -function circle$2(radius) { - return "m0," + radius - + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius - + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius - + "z"; +var step = function(context) { + return new Step(context, 0.5); +}; + +function stepBefore(context) { + return new Step(context, 0); } -var index$3 = function(projection, context) { - var pointRadius = 4.5, - projectionStream, - contextStream; +function stepAfter(context) { + return new Step(context, 1); +} - function path(object) { - if (object) { - if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments)); - geoStream(object, projectionStream(contextStream)); +var slice$5 = Array.prototype.slice; + +var none$1 = function(series, order) { + if (!((n = series.length) > 1)) return; + for (var i = 1, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) { + s0 = s1, s1 = series[order[i]]; + for (var j = 0; j < m; ++j) { + s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1]; } - return contextStream.result(); } +}; - path.area = function(object) { - geoStream(object, projectionStream(areaStream$1)); - return areaStream$1.result(); - }; +var none$2 = function(series) { + var n = series.length, o = new Array(n); + while (--n >= 0) o[n] = n; + return o; +}; - path.bounds = function(object) { - geoStream(object, projectionStream(boundsStream$1)); - return boundsStream$1.result(); - }; +function stackValue(d, key) { + return d[key]; +} - path.centroid = function(object) { - geoStream(object, projectionStream(centroidStream$1)); - return centroidStream$1.result(); +var stack = function() { + var keys = constant$10([]), + order = none$2, + offset = none$1, + value = stackValue; + + function stack(data) { + var kz = keys.apply(this, arguments), + i, + m = data.length, + n = kz.length, + sz = new Array(n), + oz; + + for (i = 0; i < n; ++i) { + for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) { + si[j] = sij = [0, +value(data[j], ki, j, data)]; + sij.data = data[j]; + } + si.key = ki; + } + + for (i = 0, oz = order(sz); i < n; ++i) { + sz[oz[i]].index = i; + } + + offset(sz, oz); + return sz; + } + + stack.keys = function(_) { + return arguments.length ? (keys = typeof _ === "function" ? _ : constant$10(slice$5.call(_)), stack) : keys; }; - path.projection = function(_) { - return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$7) : (projection = _).stream, path) : projection; + stack.value = function(_) { + return arguments.length ? (value = typeof _ === "function" ? _ : constant$10(+_), stack) : value; }; - path.context = function(_) { - if (!arguments.length) return context; - contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _); - if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius); - return path; + stack.order = function(_) { + return arguments.length ? (order = _ == null ? none$2 : typeof _ === "function" ? _ : constant$10(slice$5.call(_)), stack) : order; }; - path.pointRadius = function(_) { - if (!arguments.length) return pointRadius; - pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_); - return path; + stack.offset = function(_) { + return arguments.length ? (offset = _ == null ? none$1 : _, stack) : offset; }; - return path.projection(projection).context(context); + return stack; }; -var sum$2 = adder(); +var expand = function(series, order) { + if (!((n = series.length) > 0)) return; + for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) { + for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0; + if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y; + } + none$1(series, order); +}; -var polygonContains = function(polygon, point) { - var lambda = point[0], - phi = point[1], - normal = [sin$1(lambda), -cos$1(lambda), 0], - angle = 0, - winding = 0; +var silhouette = function(series, order) { + if (!((n = series.length) > 0)) return; + for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) { + for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0; + s0[j][1] += s0[j][0] = -y / 2; + } + none$1(series, order); +}; - sum$2.reset(); +var wiggle = function(series, order) { + if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return; + for (var y = 0, j = 1, s0, m, n; j < m; ++j) { + for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) { + var si = series[order[i]], + sij0 = si[j][1] || 0, + sij1 = si[j - 1][1] || 0, + s3 = (sij0 - sij1) / 2; + for (var k = 0; k < i; ++k) { + var sk = series[order[k]], + skj0 = sk[j][1] || 0, + skj1 = sk[j - 1][1] || 0; + s3 += skj0 - skj1; + } + s1 += sij0, s2 += s3 * sij0; + } + s0[j - 1][1] += s0[j - 1][0] = y; + if (s1) y -= s2 / s1; + } + s0[j - 1][1] += s0[j - 1][0] = y; + none$1(series, order); +}; - for (var i = 0, n = polygon.length; i < n; ++i) { - if (!(m = (ring = polygon[i]).length)) continue; - var ring, - m, - point0 = ring[m - 1], - lambda0 = point0[0], - phi0 = point0[1] / 2 + quarterPi, - sinPhi0 = sin$1(phi0), - cosPhi0 = cos$1(phi0); +var ascending$2 = function(series) { + var sums = series.map(sum$2); + return none$2(series).sort(function(a, b) { return sums[a] - sums[b]; }); +}; - for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) { - var point1 = ring[j], - lambda1 = point1[0], - phi1 = point1[1] / 2 + quarterPi, - sinPhi1 = sin$1(phi1), - cosPhi1 = cos$1(phi1), - delta = lambda1 - lambda0, - sign$$1 = delta >= 0 ? 1 : -1, - absDelta = sign$$1 * delta, - antimeridian = absDelta > pi$4, - k = sinPhi0 * sinPhi1; +function sum$2(series) { + var s = 0, i = -1, n = series.length, v; + while (++i < n) if (v = +series[i][1]) s += v; + return s; +} - sum$2.add(atan2(k * sign$$1 * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta))); - angle += antimeridian ? delta + sign$$1 * tau$4 : delta; +var descending$2 = function(series) { + return ascending$2(series).reverse(); +}; - // Are the longitudes either side of the point’s meridian (lambda), - // and are the latitudes smaller than the parallel (phi)? - if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) { - var arc = cartesianCross(cartesian(point0), cartesian(point1)); - cartesianNormalizeInPlace(arc); - var intersection = cartesianCross(normal, arc); - cartesianNormalizeInPlace(intersection); - var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin$1(intersection[2]); - if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) { - winding += antimeridian ^ delta >= 0 ? 1 : -1; - } - } +var insideOut = function(series) { + var n = series.length, + i, + j, + sums = series.map(sum$2), + order = none$2(series).sort(function(a, b) { return sums[b] - sums[a]; }), + top = 0, + bottom = 0, + tops = [], + bottoms = []; + + for (i = 0; i < n; ++i) { + j = order[i]; + if (top < bottom) { + top += sums[j]; + tops.push(j); + } else { + bottom += sums[j]; + bottoms.push(j); } } - // First, determine whether the South pole is inside or outside: - // - // It is inside if: - // * the polygon winds around it in a clockwise direction. - // * the polygon does not (cumulatively) wind around it, but has a negative - // (counter-clockwise) area. - // - // Second, count the (signed) number of times a segment crosses a lambda - // from the point to the South pole. If it is zero, then the point is the - // same side as the South pole. + return bottoms.reverse().concat(tops); +}; + +var reverse = function(series) { + return none$2(series).reverse(); +}; + +var constant$11 = function(x) { + return function() { + return x; + }; +}; + +function x$4(d) { + return d[0]; +} + +function y$4(d) { + return d[1]; +} + +function RedBlackTree() { + this._ = null; // root node +} + +function RedBlackNode(node) { + node.U = // parent node + node.C = // color - true for red, false for black + node.L = // left node + node.R = // right node + node.P = // previous node + node.N = null; // next node +} + +RedBlackTree.prototype = { + constructor: RedBlackTree, - return (angle < -epsilon$4 || angle < epsilon$4 && sum$2 < -epsilon$4) ^ (winding & 1); -}; + insert: function(after, node) { + var parent, grandpa, uncle; -var clip = function(pointVisible, clipLine, interpolate, start) { - return function(rotate, sink) { - var line = clipLine(sink), - rotatedStart = rotate.invert(start[0], start[1]), - ringBuffer = clipBuffer(), - ringSink = clipLine(ringBuffer), - polygonStarted = false, - polygon, - segments, - ring; + if (after) { + node.P = after; + node.N = after.N; + if (after.N) after.N.P = node; + after.N = node; + if (after.R) { + after = after.R; + while (after.L) after = after.L; + after.L = node; + } else { + after.R = node; + } + parent = after; + } else if (this._) { + after = RedBlackFirst(this._); + node.P = null; + node.N = after; + after.P = after.L = node; + parent = after; + } else { + node.P = node.N = null; + this._ = node; + parent = null; + } + node.L = node.R = null; + node.U = parent; + node.C = true; - var clip = { - point: point, - lineStart: lineStart, - lineEnd: lineEnd, - polygonStart: function() { - clip.point = pointRing; - clip.lineStart = ringStart; - clip.lineEnd = ringEnd; - segments = []; - polygon = []; - }, - polygonEnd: function() { - clip.point = point; - clip.lineStart = lineStart; - clip.lineEnd = lineEnd; - segments = merge(segments); - var startInside = polygonContains(polygon, rotatedStart); - if (segments.length) { - if (!polygonStarted) sink.polygonStart(), polygonStarted = true; - clipPolygon(segments, compareIntersection, startInside, interpolate, sink); - } else if (startInside) { - if (!polygonStarted) sink.polygonStart(), polygonStarted = true; - sink.lineStart(); - interpolate(null, null, 1, sink); - sink.lineEnd(); + after = node; + while (parent && parent.C) { + grandpa = parent.U; + if (parent === grandpa.L) { + uncle = grandpa.R; + if (uncle && uncle.C) { + parent.C = uncle.C = false; + grandpa.C = true; + after = grandpa; + } else { + if (after === parent.R) { + RedBlackRotateLeft(this, parent); + after = parent; + parent = after.U; + } + parent.C = false; + grandpa.C = true; + RedBlackRotateRight(this, grandpa); + } + } else { + uncle = grandpa.L; + if (uncle && uncle.C) { + parent.C = uncle.C = false; + grandpa.C = true; + after = grandpa; + } else { + if (after === parent.L) { + RedBlackRotateRight(this, parent); + after = parent; + parent = after.U; + } + parent.C = false; + grandpa.C = true; + RedBlackRotateLeft(this, grandpa); } - if (polygonStarted) sink.polygonEnd(), polygonStarted = false; - segments = polygon = null; - }, - sphere: function() { - sink.polygonStart(); - sink.lineStart(); - interpolate(null, null, 1, sink); - sink.lineEnd(); - sink.polygonEnd(); } - }; - - function point(lambda, phi) { - var point = rotate(lambda, phi); - if (pointVisible(lambda = point[0], phi = point[1])) sink.point(lambda, phi); + parent = after.U; } + this._.C = false; + }, - function pointLine(lambda, phi) { - var point = rotate(lambda, phi); - line.point(point[0], point[1]); - } + remove: function(node) { + if (node.N) node.N.P = node.P; + if (node.P) node.P.N = node.N; + node.N = node.P = null; - function lineStart() { - clip.point = pointLine; - line.lineStart(); - } + var parent = node.U, + sibling, + left = node.L, + right = node.R, + next, + red; - function lineEnd() { - clip.point = point; - line.lineEnd(); - } + if (!left) next = right; + else if (!right) next = left; + else next = RedBlackFirst(right); - function pointRing(lambda, phi) { - ring.push([lambda, phi]); - var point = rotate(lambda, phi); - ringSink.point(point[0], point[1]); + if (parent) { + if (parent.L === node) parent.L = next; + else parent.R = next; + } else { + this._ = next; } - function ringStart() { - ringSink.lineStart(); - ring = []; + if (left && right) { + red = next.C; + next.C = node.C; + next.L = left; + left.U = next; + if (next !== right) { + parent = next.U; + next.U = node.U; + node = next.R; + parent.L = node; + next.R = right; + right.U = next; + } else { + next.U = parent; + parent = next; + node = next.R; + } + } else { + red = node.C; + node = next; } - function ringEnd() { - pointRing(ring[0][0], ring[0][1]); - ringSink.lineEnd(); - - var clean = ringSink.clean(), - ringSegments = ringBuffer.result(), - i, n = ringSegments.length, m, - segment, - point; - - ring.pop(); - polygon.push(ring); - ring = null; - - if (!n) return; + if (node) node.U = parent; + if (red) return; + if (node && node.C) { node.C = false; return; } - // No intersections. - if (clean & 1) { - segment = ringSegments[0]; - if ((m = segment.length - 1) > 0) { - if (!polygonStarted) sink.polygonStart(), polygonStarted = true; - sink.lineStart(); - for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]); - sink.lineEnd(); + do { + if (node === this._) break; + if (node === parent.L) { + sibling = parent.R; + if (sibling.C) { + sibling.C = false; + parent.C = true; + RedBlackRotateLeft(this, parent); + sibling = parent.R; + } + if ((sibling.L && sibling.L.C) + || (sibling.R && sibling.R.C)) { + if (!sibling.R || !sibling.R.C) { + sibling.L.C = false; + sibling.C = true; + RedBlackRotateRight(this, sibling); + sibling = parent.R; + } + sibling.C = parent.C; + parent.C = sibling.R.C = false; + RedBlackRotateLeft(this, parent); + node = this._; + break; + } + } else { + sibling = parent.L; + if (sibling.C) { + sibling.C = false; + parent.C = true; + RedBlackRotateRight(this, parent); + sibling = parent.L; + } + if ((sibling.L && sibling.L.C) + || (sibling.R && sibling.R.C)) { + if (!sibling.L || !sibling.L.C) { + sibling.R.C = false; + sibling.C = true; + RedBlackRotateLeft(this, sibling); + sibling = parent.L; + } + sibling.C = parent.C; + parent.C = sibling.L.C = false; + RedBlackRotateRight(this, parent); + node = this._; + break; } - return; } + sibling.C = true; + node = parent; + parent = parent.U; + } while (!node.C); - // Rejoin connected segments. - // TODO reuse ringBuffer.rejoin()? - if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift())); + if (node) node.C = false; + } +}; - segments.push(ringSegments.filter(validSegment)); - } +function RedBlackRotateLeft(tree, node) { + var p = node, + q = node.R, + parent = p.U; - return clip; - }; -}; + if (parent) { + if (parent.L === p) parent.L = q; + else parent.R = q; + } else { + tree._ = q; + } -function validSegment(segment) { - return segment.length > 1; + q.U = parent; + p.U = q; + p.R = q.L; + if (p.R) p.R.U = p; + q.L = p; } -// Intersections are sorted along the clip edge. For both antimeridian cutting -// and circle clipping, the same comparison is used. -function compareIntersection(a, b) { - return ((a = a.x)[0] < 0 ? a[1] - halfPi$3 - epsilon$4 : halfPi$3 - a[1]) - - ((b = b.x)[0] < 0 ? b[1] - halfPi$3 - epsilon$4 : halfPi$3 - b[1]); -} +function RedBlackRotateRight(tree, node) { + var p = node, + q = node.L, + parent = p.U; -var clipAntimeridian = clip( - function() { return true; }, - clipAntimeridianLine, - clipAntimeridianInterpolate, - [-pi$4, -halfPi$3] -); + if (parent) { + if (parent.L === p) parent.L = q; + else parent.R = q; + } else { + tree._ = q; + } -// Takes a line and cuts into visible segments. Return values: 0 - there were -// intersections or the line was empty; 1 - no intersections; 2 - there were -// intersections, and the first and last segments should be rejoined. -function clipAntimeridianLine(stream) { - var lambda0 = NaN, - phi0 = NaN, - sign0 = NaN, - clean; // no intersections + q.U = parent; + p.U = q; + p.L = q.R; + if (p.L) p.L.U = p; + q.R = p; +} - return { - lineStart: function() { - stream.lineStart(); - clean = 1; - }, - point: function(lambda1, phi1) { - var sign1 = lambda1 > 0 ? pi$4 : -pi$4, - delta = abs(lambda1 - lambda0); - if (abs(delta - pi$4) < epsilon$4) { // line crosses a pole - stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi$3 : -halfPi$3); - stream.point(sign0, phi0); - stream.lineEnd(); - stream.lineStart(); - stream.point(sign1, phi0); - stream.point(lambda1, phi0); - clean = 0; - } else if (sign0 !== sign1 && delta >= pi$4) { // line crosses antimeridian - if (abs(lambda0 - sign0) < epsilon$4) lambda0 -= sign0 * epsilon$4; // handle degeneracies - if (abs(lambda1 - sign1) < epsilon$4) lambda1 -= sign1 * epsilon$4; - phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1); - stream.point(sign0, phi0); - stream.lineEnd(); - stream.lineStart(); - stream.point(sign1, phi0); - clean = 0; - } - stream.point(lambda0 = lambda1, phi0 = phi1); - sign0 = sign1; - }, - lineEnd: function() { - stream.lineEnd(); - lambda0 = phi0 = NaN; - }, - clean: function() { - return 2 - clean; // if intersections, rejoin first and last segments - } - }; +function RedBlackFirst(node) { + while (node.L) node = node.L; + return node; } -function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) { - var cosPhi0, - cosPhi1, - sinLambda0Lambda1 = sin$1(lambda0 - lambda1); - return abs(sinLambda0Lambda1) > epsilon$4 - ? atan((sin$1(phi0) * (cosPhi1 = cos$1(phi1)) * sin$1(lambda1) - - sin$1(phi1) * (cosPhi0 = cos$1(phi0)) * sin$1(lambda0)) - / (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) - : (phi0 + phi1) / 2; +function createEdge(left, right, v0, v1) { + var edge = [null, null], + index = edges.push(edge) - 1; + edge.left = left; + edge.right = right; + if (v0) setEdgeEnd(edge, left, right, v0); + if (v1) setEdgeEnd(edge, right, left, v1); + cells[left.index].halfedges.push(index); + cells[right.index].halfedges.push(index); + return edge; } -function clipAntimeridianInterpolate(from, to, direction, stream) { - var phi; - if (from == null) { - phi = direction * halfPi$3; - stream.point(-pi$4, phi); - stream.point(0, phi); - stream.point(pi$4, phi); - stream.point(pi$4, 0); - stream.point(pi$4, -phi); - stream.point(0, -phi); - stream.point(-pi$4, -phi); - stream.point(-pi$4, 0); - stream.point(-pi$4, phi); - } else if (abs(from[0] - to[0]) > epsilon$4) { - var lambda = from[0] < to[0] ? pi$4 : -pi$4; - phi = direction * lambda / 2; - stream.point(-lambda, phi); - stream.point(0, phi); - stream.point(lambda, phi); +function createBorderEdge(left, v0, v1) { + var edge = [v0, v1]; + edge.left = left; + return edge; +} + +function setEdgeEnd(edge, left, right, vertex) { + if (!edge[0] && !edge[1]) { + edge[0] = vertex; + edge.left = left; + edge.right = right; + } else if (edge.left === right) { + edge[1] = vertex; } else { - stream.point(to[0], to[1]); + edge[0] = vertex; } } -var clipCircle = function(radius, delta) { - var cr = cos$1(radius), - smallRadius = cr > 0, - notHemisphere = abs(cr) > epsilon$4; // TODO optimise for this common case +// Liang–Barsky line clipping. +function clipEdge(edge, x0, y0, x1, y1) { + var a = edge[0], + b = edge[1], + ax = a[0], + ay = a[1], + bx = b[0], + by = b[1], + t0 = 0, + t1 = 1, + dx = bx - ax, + dy = by - ay, + r; - function interpolate(from, to, direction, stream) { - circleStream(stream, radius, delta, direction, from, to); + r = x0 - ax; + if (!dx && r > 0) return; + r /= dx; + if (dx < 0) { + if (r < t0) return; + if (r < t1) t1 = r; + } else if (dx > 0) { + if (r > t1) return; + if (r > t0) t0 = r; } - function visible(lambda, phi) { - return cos$1(lambda) * cos$1(phi) > cr; + r = x1 - ax; + if (!dx && r < 0) return; + r /= dx; + if (dx < 0) { + if (r > t1) return; + if (r > t0) t0 = r; + } else if (dx > 0) { + if (r < t0) return; + if (r < t1) t1 = r; } - // Takes a line and cuts into visible segments. Return values used for polygon - // clipping: 0 - there were intersections or the line was empty; 1 - no - // intersections 2 - there were intersections, and the first and last segments - // should be rejoined. - function clipLine(stream) { - var point0, // previous point - c0, // code for previous point - v0, // visibility of previous point - v00, // visibility of first point - clean; // no intersections - return { - lineStart: function() { - v00 = v0 = false; - clean = 1; - }, - point: function(lambda, phi) { - var point1 = [lambda, phi], - point2, - v = visible(lambda, phi), - c = smallRadius - ? v ? 0 : code(lambda, phi) - : v ? code(lambda + (lambda < 0 ? pi$4 : -pi$4), phi) : 0; - if (!point0 && (v00 = v0 = v)) stream.lineStart(); - // Handle degeneracies. - // TODO ignore if not clipping polygons. - if (v !== v0) { - point2 = intersect(point0, point1); - if (pointEqual(point0, point2) || pointEqual(point1, point2)) { - point1[0] += epsilon$4; - point1[1] += epsilon$4; - v = visible(point1[0], point1[1]); - } - } - if (v !== v0) { - clean = 0; - if (v) { - // outside going in - stream.lineStart(); - point2 = intersect(point1, point0); - stream.point(point2[0], point2[1]); - } else { - // inside going out - point2 = intersect(point0, point1); - stream.point(point2[0], point2[1]); - stream.lineEnd(); - } - point0 = point2; - } else if (notHemisphere && point0 && smallRadius ^ v) { - var t; - // If the codes for two points are different, or are both zero, - // and there this segment intersects with the small circle. - if (!(c & c0) && (t = intersect(point1, point0, true))) { - clean = 0; - if (smallRadius) { - stream.lineStart(); - stream.point(t[0][0], t[0][1]); - stream.point(t[1][0], t[1][1]); - stream.lineEnd(); - } else { - stream.point(t[1][0], t[1][1]); - stream.lineEnd(); - stream.lineStart(); - stream.point(t[0][0], t[0][1]); - } - } - } - if (v && (!point0 || !pointEqual(point0, point1))) { - stream.point(point1[0], point1[1]); - } - point0 = point1, v0 = v, c0 = c; - }, - lineEnd: function() { - if (v0) stream.lineEnd(); - point0 = null; - }, - // Rejoin first and last segments if there were intersections and the first - // and last points were visible. - clean: function() { - return clean | ((v00 && v0) << 1); + r = y0 - ay; + if (!dy && r > 0) return; + r /= dy; + if (dy < 0) { + if (r < t0) return; + if (r < t1) t1 = r; + } else if (dy > 0) { + if (r > t1) return; + if (r > t0) t0 = r; + } + + r = y1 - ay; + if (!dy && r < 0) return; + r /= dy; + if (dy < 0) { + if (r > t1) return; + if (r > t0) t0 = r; + } else if (dy > 0) { + if (r < t0) return; + if (r < t1) t1 = r; + } + + if (!(t0 > 0) && !(t1 < 1)) return true; // TODO Better check? + + if (t0 > 0) edge[0] = [ax + t0 * dx, ay + t0 * dy]; + if (t1 < 1) edge[1] = [ax + t1 * dx, ay + t1 * dy]; + return true; +} + +function connectEdge(edge, x0, y0, x1, y1) { + var v1 = edge[1]; + if (v1) return true; + + var v0 = edge[0], + left = edge.left, + right = edge.right, + lx = left[0], + ly = left[1], + rx = right[0], + ry = right[1], + fx = (lx + rx) / 2, + fy = (ly + ry) / 2, + fm, + fb; + + if (ry === ly) { + if (fx < x0 || fx >= x1) return; + if (lx > rx) { + if (!v0) v0 = [fx, y0]; + else if (v0[1] >= y1) return; + v1 = [fx, y1]; + } else { + if (!v0) v0 = [fx, y1]; + else if (v0[1] < y0) return; + v1 = [fx, y0]; + } + } else { + fm = (lx - rx) / (ry - ly); + fb = fy - fm * fx; + if (fm < -1 || fm > 1) { + if (lx > rx) { + if (!v0) v0 = [(y0 - fb) / fm, y0]; + else if (v0[1] >= y1) return; + v1 = [(y1 - fb) / fm, y1]; + } else { + if (!v0) v0 = [(y1 - fb) / fm, y1]; + else if (v0[1] < y0) return; + v1 = [(y0 - fb) / fm, y0]; } - }; + } else { + if (ly < ry) { + if (!v0) v0 = [x0, fm * x0 + fb]; + else if (v0[0] >= x1) return; + v1 = [x1, fm * x1 + fb]; + } else { + if (!v0) v0 = [x1, fm * x1 + fb]; + else if (v0[0] < x0) return; + v1 = [x0, fm * x0 + fb]; + } + } } - // Intersects the great circle between a and b with the clip circle. - function intersect(a, b, two) { - var pa = cartesian(a), - pb = cartesian(b); + edge[0] = v0; + edge[1] = v1; + return true; +} - // We have two planes, n1.p = d1 and n2.p = d2. - // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2). - var n1 = [1, 0, 0], // normal - n2 = cartesianCross(pa, pb), - n2n2 = cartesianDot(n2, n2), - n1n2 = n2[0], // cartesianDot(n1, n2), - determinant = n2n2 - n1n2 * n1n2; +function clipEdges(x0, y0, x1, y1) { + var i = edges.length, + edge; - // Two polar points. - if (!determinant) return !two && a; + while (i--) { + if (!connectEdge(edge = edges[i], x0, y0, x1, y1) + || !clipEdge(edge, x0, y0, x1, y1) + || !(Math.abs(edge[0][0] - edge[1][0]) > epsilon$4 + || Math.abs(edge[0][1] - edge[1][1]) > epsilon$4)) { + delete edges[i]; + } + } +} - var c1 = cr * n2n2 / determinant, - c2 = -cr * n1n2 / determinant, - n1xn2 = cartesianCross(n1, n2), - A = cartesianScale(n1, c1), - B = cartesianScale(n2, c2); - cartesianAddInPlace(A, B); +function createCell(site) { + return cells[site.index] = { + site: site, + halfedges: [] + }; +} - // Solve |p(t)|^2 = 1. - var u = n1xn2, - w = cartesianDot(A, u), - uu = cartesianDot(u, u), - t2 = w * w - uu * (cartesianDot(A, A) - 1); +function cellHalfedgeAngle(cell, edge) { + var site = cell.site, + va = edge.left, + vb = edge.right; + if (site === vb) vb = va, va = site; + if (vb) return Math.atan2(vb[1] - va[1], vb[0] - va[0]); + if (site === va) va = edge[1], vb = edge[0]; + else va = edge[0], vb = edge[1]; + return Math.atan2(va[0] - vb[0], vb[1] - va[1]); +} - if (t2 < 0) return; +function cellHalfedgeStart(cell, edge) { + return edge[+(edge.left !== cell.site)]; +} - var t = sqrt$1(t2), - q = cartesianScale(u, (-w - t) / uu); - cartesianAddInPlace(q, A); - q = spherical(q); +function cellHalfedgeEnd(cell, edge) { + return edge[+(edge.left === cell.site)]; +} - if (!two) return q; +function sortCellHalfedges() { + for (var i = 0, n = cells.length, cell, halfedges, j, m; i < n; ++i) { + if ((cell = cells[i]) && (m = (halfedges = cell.halfedges).length)) { + var index = new Array(m), + array = new Array(m); + for (j = 0; j < m; ++j) index[j] = j, array[j] = cellHalfedgeAngle(cell, edges[halfedges[j]]); + index.sort(function(i, j) { return array[j] - array[i]; }); + for (j = 0; j < m; ++j) array[j] = halfedges[index[j]]; + for (j = 0; j < m; ++j) halfedges[j] = array[j]; + } + } +} - // Two intersection points. - var lambda0 = a[0], - lambda1 = b[0], - phi0 = a[1], - phi1 = b[1], - z; +function clipCells(x0, y0, x1, y1) { + var nCells = cells.length, + iCell, + cell, + site, + iHalfedge, + halfedges, + nHalfedges, + start, + startX, + startY, + end, + endX, + endY, + cover = true; - if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z; + for (iCell = 0; iCell < nCells; ++iCell) { + if (cell = cells[iCell]) { + site = cell.site; + halfedges = cell.halfedges; + iHalfedge = halfedges.length; - var delta = lambda1 - lambda0, - polar = abs(delta - pi$4) < epsilon$4, - meridian = polar || delta < epsilon$4; + // Remove any dangling clipped edges. + while (iHalfedge--) { + if (!edges[halfedges[iHalfedge]]) { + halfedges.splice(iHalfedge, 1); + } + } - if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z; + // Insert any border edges as necessary. + iHalfedge = 0, nHalfedges = halfedges.length; + while (iHalfedge < nHalfedges) { + end = cellHalfedgeEnd(cell, edges[halfedges[iHalfedge]]), endX = end[0], endY = end[1]; + start = cellHalfedgeStart(cell, edges[halfedges[++iHalfedge % nHalfedges]]), startX = start[0], startY = start[1]; + if (Math.abs(endX - startX) > epsilon$4 || Math.abs(endY - startY) > epsilon$4) { + halfedges.splice(iHalfedge, 0, edges.push(createBorderEdge(site, end, + Math.abs(endX - x0) < epsilon$4 && y1 - endY > epsilon$4 ? [x0, Math.abs(startX - x0) < epsilon$4 ? startY : y1] + : Math.abs(endY - y1) < epsilon$4 && x1 - endX > epsilon$4 ? [Math.abs(startY - y1) < epsilon$4 ? startX : x1, y1] + : Math.abs(endX - x1) < epsilon$4 && endY - y0 > epsilon$4 ? [x1, Math.abs(startX - x1) < epsilon$4 ? startY : y0] + : Math.abs(endY - y0) < epsilon$4 && endX - x0 > epsilon$4 ? [Math.abs(startY - y0) < epsilon$4 ? startX : x0, y0] + : null)) - 1); + ++nHalfedges; + } + } - // Check that the first point is between a and b. - if (meridian - ? polar - ? phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon$4 ? phi0 : phi1) - : phi0 <= q[1] && q[1] <= phi1 - : delta > pi$4 ^ (lambda0 <= q[0] && q[0] <= lambda1)) { - var q1 = cartesianScale(u, (-w + t) / uu); - cartesianAddInPlace(q1, A); - return [q, spherical(q1)]; + if (nHalfedges) cover = false; } } - // Generates a 4-bit vector representing the location of a point relative to - // the small circle's bounding box. - function code(lambda, phi) { - var r = smallRadius ? radius : pi$4 - radius, - code = 0; - if (lambda < -r) code |= 1; // left - else if (lambda > r) code |= 2; // right - if (phi < -r) code |= 4; // below - else if (phi > r) code |= 8; // above - return code; + // If there weren’t any edges, have the closest site cover the extent. + // It doesn’t matter which corner of the extent we measure! + if (cover) { + var dx, dy, d2, dc = Infinity; + + for (iCell = 0, cover = null; iCell < nCells; ++iCell) { + if (cell = cells[iCell]) { + site = cell.site; + dx = site[0] - x0; + dy = site[1] - y0; + d2 = dx * dx + dy * dy; + if (d2 < dc) dc = d2, cover = cell; + } + } + + if (cover) { + var v00 = [x0, y0], v01 = [x0, y1], v11 = [x1, y1], v10 = [x1, y0]; + cover.halfedges.push( + edges.push(createBorderEdge(site = cover.site, v00, v01)) - 1, + edges.push(createBorderEdge(site, v01, v11)) - 1, + edges.push(createBorderEdge(site, v11, v10)) - 1, + edges.push(createBorderEdge(site, v10, v00)) - 1 + ); + } } - return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$4, radius - pi$4]); -}; + // Lastly delete any cells with no edges; these were entirely clipped. + for (iCell = 0; iCell < nCells; ++iCell) { + if (cell = cells[iCell]) { + if (!cell.halfedges.length) { + delete cells[iCell]; + } + } + } +} + +var circlePool = []; + +var firstCircle; + +function Circle() { + RedBlackNode(this); + this.x = + this.y = + this.arc = + this.site = + this.cy = null; +} + +function attachCircle(arc) { + var lArc = arc.P, + rArc = arc.N; -var transform$1 = function(methods) { - return { - stream: transformer(methods) - }; -}; + if (!lArc || !rArc) return; -function transformer(methods) { - return function(stream) { - var s = new TransformStream; - for (var key in methods) s[key] = methods[key]; - s.stream = stream; - return s; - }; -} + var lSite = lArc.site, + cSite = arc.site, + rSite = rArc.site; -function TransformStream() {} + if (lSite === rSite) return; -TransformStream.prototype = { - constructor: TransformStream, - point: function(x, y) { this.stream.point(x, y); }, - sphere: function() { this.stream.sphere(); }, - lineStart: function() { this.stream.lineStart(); }, - lineEnd: function() { this.stream.lineEnd(); }, - polygonStart: function() { this.stream.polygonStart(); }, - polygonEnd: function() { this.stream.polygonEnd(); } -}; + var bx = cSite[0], + by = cSite[1], + ax = lSite[0] - bx, + ay = lSite[1] - by, + cx = rSite[0] - bx, + cy = rSite[1] - by; -function fitExtent(projection, extent, object) { - var w = extent[1][0] - extent[0][0], - h = extent[1][1] - extent[0][1], - clip = projection.clipExtent && projection.clipExtent(); + var d = 2 * (ax * cy - ay * cx); + if (d >= -epsilon2$2) return; - projection - .scale(150) - .translate([0, 0]); + var ha = ax * ax + ay * ay, + hc = cx * cx + cy * cy, + x = (cy * ha - ay * hc) / d, + y = (ax * hc - cx * ha) / d; - if (clip != null) projection.clipExtent(null); + var circle = circlePool.pop() || new Circle; + circle.arc = arc; + circle.site = cSite; + circle.x = x + bx; + circle.y = (circle.cy = y + by) + Math.sqrt(x * x + y * y); // y bottom - geoStream(object, projection.stream(boundsStream$1)); + arc.circle = circle; - var b = boundsStream$1.result(), - k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])), - x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2, - y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2; + var before = null, + node = circles._; - if (clip != null) projection.clipExtent(clip); + while (node) { + if (circle.y < node.y || (circle.y === node.y && circle.x <= node.x)) { + if (node.L) node = node.L; + else { before = node.P; break; } + } else { + if (node.R) node = node.R; + else { before = node; break; } + } + } - return projection - .scale(k * 150) - .translate([x, y]); + circles.insert(before, circle); + if (!before) firstCircle = circle; } -function fitSize(projection, size, object) { - return fitExtent(projection, [[0, 0], size], object); +function detachCircle(arc) { + var circle = arc.circle; + if (circle) { + if (!circle.P) firstCircle = circle.N; + circles.remove(circle); + circlePool.push(circle); + RedBlackNode(circle); + arc.circle = null; + } } -var maxDepth = 16; -var cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance) - -var resample = function(project, delta2) { - return +delta2 ? resample$1(project, delta2) : resampleNone(project); -}; +var beachPool = []; -function resampleNone(project) { - return transformer({ - point: function(x, y) { - x = project(x, y); - this.stream.point(x[0], x[1]); - } - }); +function Beach() { + RedBlackNode(this); + this.edge = + this.site = + this.circle = null; } -function resample$1(project, delta2) { +function createBeach(site) { + var beach = beachPool.pop() || new Beach; + beach.site = site; + return beach; +} - function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) { - var dx = x1 - x0, - dy = y1 - y0, - d2 = dx * dx + dy * dy; - if (d2 > 4 * delta2 && depth--) { - var a = a0 + a1, - b = b0 + b1, - c = c0 + c1, - m = sqrt$1(a * a + b * b + c * c), - phi2 = asin$1(c /= m), - lambda2 = abs(abs(c) - 1) < epsilon$4 || abs(lambda0 - lambda1) < epsilon$4 ? (lambda0 + lambda1) / 2 : atan2(b, a), - p = project(lambda2, phi2), - x2 = p[0], - y2 = p[1], - dx2 = x2 - x0, - dy2 = y2 - y0, - dz = dy * dx2 - dx * dy2; - if (dz * dz / d2 > delta2 // perpendicular projected distance - || abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end - || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance - resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream); - stream.point(x2, y2); - resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream); - } - } - } - return function(stream) { - var lambda00, x00, y00, a00, b00, c00, // first point - lambda0, x0, y0, a0, b0, c0; // previous point +function detachBeach(beach) { + detachCircle(beach); + beaches.remove(beach); + beachPool.push(beach); + RedBlackNode(beach); +} - var resampleStream = { - point: point, - lineStart: lineStart, - lineEnd: lineEnd, - polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; }, - polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; } - }; +function removeBeach(beach) { + var circle = beach.circle, + x = circle.x, + y = circle.cy, + vertex = [x, y], + previous = beach.P, + next = beach.N, + disappearing = [beach]; - function point(x, y) { - x = project(x, y); - stream.point(x[0], x[1]); - } + detachBeach(beach); - function lineStart() { - x0 = NaN; - resampleStream.point = linePoint; - stream.lineStart(); - } + var lArc = previous; + while (lArc.circle + && Math.abs(x - lArc.circle.x) < epsilon$4 + && Math.abs(y - lArc.circle.cy) < epsilon$4) { + previous = lArc.P; + disappearing.unshift(lArc); + detachBeach(lArc); + lArc = previous; + } - function linePoint(lambda, phi) { - var c = cartesian([lambda, phi]), p = project(lambda, phi); - resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream); - stream.point(x0, y0); - } + disappearing.unshift(lArc); + detachCircle(lArc); - function lineEnd() { - resampleStream.point = point; - stream.lineEnd(); - } + var rArc = next; + while (rArc.circle + && Math.abs(x - rArc.circle.x) < epsilon$4 + && Math.abs(y - rArc.circle.cy) < epsilon$4) { + next = rArc.N; + disappearing.push(rArc); + detachBeach(rArc); + rArc = next; + } - function ringStart() { - lineStart(); - resampleStream.point = ringPoint; - resampleStream.lineEnd = ringEnd; - } + disappearing.push(rArc); + detachCircle(rArc); - function ringPoint(lambda, phi) { - linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0; - resampleStream.point = linePoint; - } + var nArcs = disappearing.length, + iArc; + for (iArc = 1; iArc < nArcs; ++iArc) { + rArc = disappearing[iArc]; + lArc = disappearing[iArc - 1]; + setEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex); + } - function ringEnd() { - resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream); - resampleStream.lineEnd = lineEnd; - lineEnd(); - } + lArc = disappearing[0]; + rArc = disappearing[nArcs - 1]; + rArc.edge = createEdge(lArc.site, rArc.site, null, vertex); - return resampleStream; - }; + attachCircle(lArc); + attachCircle(rArc); } -var transformRadians = transformer({ - point: function(x, y) { - this.stream.point(x * radians, y * radians); +function addBeach(site) { + var x = site[0], + directrix = site[1], + lArc, + rArc, + dxl, + dxr, + node = beaches._; + + while (node) { + dxl = leftBreakPoint(node, directrix) - x; + if (dxl > epsilon$4) node = node.L; else { + dxr = x - rightBreakPoint(node, directrix); + if (dxr > epsilon$4) { + if (!node.R) { + lArc = node; + break; + } + node = node.R; + } else { + if (dxl > -epsilon$4) { + lArc = node.P; + rArc = node; + } else if (dxr > -epsilon$4) { + lArc = node; + rArc = node.N; + } else { + lArc = rArc = node; + } + break; + } + } } -}); -function projection(project) { - return projectionMutator(function() { return project; })(); -} + createCell(site); + var newArc = createBeach(site); + beaches.insert(lArc, newArc); -function projectionMutator(projectAt) { - var project, - k = 150, // scale - x = 480, y = 250, // translate - dx, dy, lambda = 0, phi = 0, // center - deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, projectRotate, // rotate - theta = null, preclip = clipAntimeridian, // clip angle - x0 = null, y0, x1, y1, postclip = identity$7, // clip extent - delta2 = 0.5, projectResample = resample(projectTransform, delta2), // precision - cache, - cacheStream; + if (!lArc && !rArc) return; - function projection(point) { - point = projectRotate(point[0] * radians, point[1] * radians); - return [point[0] * k + dx, dy - point[1] * k]; + if (lArc === rArc) { + detachCircle(lArc); + rArc = createBeach(lArc.site); + beaches.insert(newArc, rArc); + newArc.edge = rArc.edge = createEdge(lArc.site, newArc.site); + attachCircle(lArc); + attachCircle(rArc); + return; } - function invert(point) { - point = projectRotate.invert((point[0] - dx) / k, (dy - point[1]) / k); - return point && [point[0] * degrees$1, point[1] * degrees$1]; + if (!rArc) { // && lArc + newArc.edge = createEdge(lArc.site, newArc.site); + return; } - function projectTransform(x, y) { - return x = project(x, y), [x[0] * k + dx, dy - x[1] * k]; - } + // else lArc !== rArc + detachCircle(lArc); + detachCircle(rArc); - projection.stream = function(stream) { - return cache && cacheStream === stream ? cache : cache = transformRadians(preclip(rotate, projectResample(postclip(cacheStream = stream)))); - }; + var lSite = lArc.site, + ax = lSite[0], + ay = lSite[1], + bx = site[0] - ax, + by = site[1] - ay, + rSite = rArc.site, + cx = rSite[0] - ax, + cy = rSite[1] - ay, + d = 2 * (bx * cy - by * cx), + hb = bx * bx + by * by, + hc = cx * cx + cy * cy, + vertex = [(cy * hb - by * hc) / d + ax, (bx * hc - cx * hb) / d + ay]; - projection.clipAngle = function(_) { - return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians, 6 * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1; - }; + setEdgeEnd(rArc.edge, lSite, rSite, vertex); + newArc.edge = createEdge(lSite, site, null, vertex); + rArc.edge = createEdge(site, rSite, null, vertex); + attachCircle(lArc); + attachCircle(rArc); +} - projection.clipExtent = function(_) { - return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$7) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]]; - }; +function leftBreakPoint(arc, directrix) { + var site = arc.site, + rfocx = site[0], + rfocy = site[1], + pby2 = rfocy - directrix; - projection.scale = function(_) { - return arguments.length ? (k = +_, recenter()) : k; - }; + if (!pby2) return rfocx; - projection.translate = function(_) { - return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y]; - }; + var lArc = arc.P; + if (!lArc) return -Infinity; - projection.center = function(_) { - return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1]; - }; + site = lArc.site; + var lfocx = site[0], + lfocy = site[1], + plby2 = lfocy - directrix; - projection.rotate = function(_) { - return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1]; - }; + if (!plby2) return lfocx; - projection.precision = function(_) { - return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt$1(delta2); - }; + var hl = lfocx - rfocx, + aby2 = 1 / pby2 - 1 / plby2, + b = hl / plby2; - projection.fitExtent = function(extent, object) { - return fitExtent(projection, extent, object); - }; + if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx; - projection.fitSize = function(size, object) { - return fitSize(projection, size, object); - }; + return (rfocx + lfocx) / 2; +} - function recenter() { - projectRotate = compose(rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma), project); - var center = project(lambda, phi); - dx = x - center[0] * k; - dy = y + center[1] * k; - return reset(); - } +function rightBreakPoint(arc, directrix) { + var rArc = arc.N; + if (rArc) return leftBreakPoint(rArc, directrix); + var site = arc.site; + return site[1] === directrix ? site[0] : Infinity; +} - function reset() { - cache = cacheStream = null; - return projection; - } +var epsilon$4 = 1e-6; +var epsilon2$2 = 1e-12; +var beaches; +var cells; +var circles; +var edges; - return function() { - project = projectAt.apply(this, arguments); - projection.invert = project.invert && invert; - return recenter(); - }; +function triangleArea(a, b, c) { + return (a[0] - c[0]) * (b[1] - a[1]) - (a[0] - b[0]) * (c[1] - a[1]); } -function conicProjection(projectAt) { - var phi0 = 0, - phi1 = pi$4 / 3, - m = projectionMutator(projectAt), - p = m(phi0, phi1); +function lexicographic(a, b) { + return b[1] - a[1] + || b[0] - a[0]; +} - p.parallels = function(_) { - return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees$1, phi1 * degrees$1]; - }; +function Diagram(sites, extent) { + var site = sites.sort(lexicographic).pop(), + x, + y, + circle; - return p; -} + edges = []; + cells = new Array(sites.length); + beaches = new RedBlackTree; + circles = new RedBlackTree; -function cylindricalEqualAreaRaw(phi0) { - var cosPhi0 = cos$1(phi0); + while (true) { + circle = firstCircle; + if (site && (!circle || site[1] < circle.y || (site[1] === circle.y && site[0] < circle.x))) { + if (site[0] !== x || site[1] !== y) { + addBeach(site); + x = site[0], y = site[1]; + } + site = sites.pop(); + } else if (circle) { + removeBeach(circle.arc); + } else { + break; + } + } - function forward(lambda, phi) { - return [lambda * cosPhi0, sin$1(phi) / cosPhi0]; + sortCellHalfedges(); + + if (extent) { + var x0 = +extent[0][0], + y0 = +extent[0][1], + x1 = +extent[1][0], + y1 = +extent[1][1]; + clipEdges(x0, y0, x1, y1); + clipCells(x0, y0, x1, y1); } - forward.invert = function(x, y) { - return [x / cosPhi0, asin$1(y * cosPhi0)]; - }; + this.edges = edges; + this.cells = cells; - return forward; + beaches = + circles = + edges = + cells = null; } -function conicEqualAreaRaw(y0, y1) { - var sy0 = sin$1(y0), n = (sy0 + sin$1(y1)) / 2; +Diagram.prototype = { + constructor: Diagram, - // Are the parallels symmetrical around the Equator? - if (abs(n) < epsilon$4) return cylindricalEqualAreaRaw(y0); + polygons: function() { + var edges = this.edges; - var c = 1 + sy0 * (2 * n - sy0), r0 = sqrt$1(c) / n; + return this.cells.map(function(cell) { + var polygon = cell.halfedges.map(function(i) { return cellHalfedgeStart(cell, edges[i]); }); + polygon.data = cell.site.data; + return polygon; + }); + }, - function project(x, y) { - var r = sqrt$1(c - 2 * n * sin$1(y)) / n; - return [r * sin$1(x *= n), r0 - r * cos$1(x)]; - } + triangles: function() { + var triangles = [], + edges = this.edges; - project.invert = function(x, y) { - var r0y = r0 - y; - return [atan2(x, abs(r0y)) / n * sign$1(r0y), asin$1((c - (x * x + r0y * r0y) * n * n) / (2 * n))]; - }; + this.cells.forEach(function(cell, i) { + if (!(m = (halfedges = cell.halfedges).length)) return; + var site = cell.site, + halfedges, + j = -1, + m, + s0, + e1 = edges[halfedges[m - 1]], + s1 = e1.left === site ? e1.right : e1.left; - return project; -} + while (++j < m) { + s0 = s1; + e1 = edges[halfedges[j]]; + s1 = e1.left === site ? e1.right : e1.left; + if (s0 && s1 && i < s0.index && i < s1.index && triangleArea(site, s0, s1) < 0) { + triangles.push([site.data, s0.data, s1.data]); + } + } + }); + + return triangles; + }, + + links: function() { + return this.edges.filter(function(edge) { + return edge.right; + }).map(function(edge) { + return { + source: edge.left.data, + target: edge.right.data + }; + }); + }, + + find: function(x, y, radius) { + var that = this, i0, i1 = that._found || 0, n = that.cells.length, cell; + + // Use the previously-found cell, or start with an arbitrary one. + while (!(cell = that.cells[i1])) if (++i1 >= n) return null; + var dx = x - cell.site[0], dy = y - cell.site[1], d2 = dx * dx + dy * dy; + + // Traverse the half-edges to find a closer cell, if any. + do { + cell = that.cells[i0 = i1], i1 = null; + cell.halfedges.forEach(function(e) { + var edge = that.edges[e], v = edge.left; + if ((v === cell.site || !v) && !(v = edge.right)) return; + var vx = x - v[0], vy = y - v[1], v2 = vx * vx + vy * vy; + if (v2 < d2) d2 = v2, i1 = v.index; + }); + } while (i1 !== null); -var conicEqualArea = function() { - return conicProjection(conicEqualAreaRaw) - .scale(155.424) - .center([0, 33.6442]); -}; + that._found = i0; -var albers = function() { - return conicEqualArea() - .parallels([29.5, 45.5]) - .scale(1070) - .translate([480, 250]) - .rotate([96, 0]) - .center([-0.6, 38.7]); + return radius == null || d2 <= radius * radius ? cell.site : null; + } }; -// The projections must have mutually exclusive clip regions on the sphere, -// as this will avoid emitting interleaving lines and polygons. -function multiplex(streams) { - var n = streams.length; - return { - point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); }, - sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); }, - lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); }, - lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); }, - polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); }, - polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); } - }; -} - -// A composite projection for the United States, configured by default for -// 960×500. The projection also works quite well at 960×600 if you change the -// scale to 1285 and adjust the translate accordingly. The set of standard -// parallels for each region comes from USGS, which is published here: -// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers -var albersUsa = function() { - var cache, - cacheStream, - lower48 = albers(), lower48Point, - alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338 - hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007 - point, pointStream = {point: function(x, y) { point = [x, y]; }}; +var voronoi = function() { + var x$$1 = x$4, + y$$1 = y$4, + extent = null; - function albersUsa(coordinates) { - var x = coordinates[0], y = coordinates[1]; - return point = null, - (lower48Point.point(x, y), point) - || (alaskaPoint.point(x, y), point) - || (hawaiiPoint.point(x, y), point); + function voronoi(data) { + return new Diagram(data.map(function(d, i) { + var s = [Math.round(x$$1(d, i, data) / epsilon$4) * epsilon$4, Math.round(y$$1(d, i, data) / epsilon$4) * epsilon$4]; + s.index = i; + s.data = d; + return s; + }), extent); } - albersUsa.invert = function(coordinates) { - var k = lower48.scale(), - t = lower48.translate(), - x = (coordinates[0] - t[0]) / k, - y = (coordinates[1] - t[1]) / k; - return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska - : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii - : lower48).invert(coordinates); + voronoi.polygons = function(data) { + return voronoi(data).polygons(); }; - albersUsa.stream = function(stream) { - return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]); + voronoi.links = function(data) { + return voronoi(data).links(); }; - albersUsa.precision = function(_) { - if (!arguments.length) return lower48.precision(); - lower48.precision(_), alaska.precision(_), hawaii.precision(_); - return reset(); + voronoi.triangles = function(data) { + return voronoi(data).triangles(); }; - albersUsa.scale = function(_) { - if (!arguments.length) return lower48.scale(); - lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_); - return albersUsa.translate(lower48.translate()); + voronoi.x = function(_) { + return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$11(+_), voronoi) : x$$1; }; - albersUsa.translate = function(_) { - if (!arguments.length) return lower48.translate(); - var k = lower48.scale(), x = +_[0], y = +_[1]; - - lower48Point = lower48 - .translate(_) - .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]]) - .stream(pointStream); - - alaskaPoint = alaska - .translate([x - 0.307 * k, y + 0.201 * k]) - .clipExtent([[x - 0.425 * k + epsilon$4, y + 0.120 * k + epsilon$4], [x - 0.214 * k - epsilon$4, y + 0.234 * k - epsilon$4]]) - .stream(pointStream); - - hawaiiPoint = hawaii - .translate([x - 0.205 * k, y + 0.212 * k]) - .clipExtent([[x - 0.214 * k + epsilon$4, y + 0.166 * k + epsilon$4], [x - 0.115 * k - epsilon$4, y + 0.234 * k - epsilon$4]]) - .stream(pointStream); - - return reset(); + voronoi.y = function(_) { + return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$11(+_), voronoi) : y$$1; }; - albersUsa.fitExtent = function(extent, object) { - return fitExtent(albersUsa, extent, object); + voronoi.extent = function(_) { + return arguments.length ? (extent = _ == null ? null : [[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]], voronoi) : extent && [[extent[0][0], extent[0][1]], [extent[1][0], extent[1][1]]]; }; - albersUsa.fitSize = function(size, object) { - return fitSize(albersUsa, size, object); + voronoi.size = function(_) { + return arguments.length ? (extent = _ == null ? null : [[0, 0], [+_[0], +_[1]]], voronoi) : extent && [extent[1][0] - extent[0][0], extent[1][1] - extent[0][1]]; }; - function reset() { - cache = cacheStream = null; - return albersUsa; - } + return voronoi; +}; - return albersUsa.scale(1070); +var constant$12 = function(x) { + return function() { + return x; + }; }; -function azimuthalRaw(scale) { - return function(x, y) { - var cx = cos$1(x), - cy = cos$1(y), - k = scale(cx * cy); - return [ - k * cy * sin$1(x), - k * sin$1(y) - ]; - } +function ZoomEvent(target, type, transform) { + this.target = target; + this.type = type; + this.transform = transform; } -function azimuthalInvert(angle) { - return function(x, y) { - var z = sqrt$1(x * x + y * y), - c = angle(z), - sc = sin$1(c), - cc = cos$1(c); - return [ - atan2(x * sc, z * cc), - asin$1(z && y * sc / z) - ]; - } +function Transform(k, x, y) { + this.k = k; + this.x = x; + this.y = y; } -var azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) { - return sqrt$1(2 / (1 + cxcy)); -}); +Transform.prototype = { + constructor: Transform, + scale: function(k) { + return k === 1 ? this : new Transform(this.k * k, this.x, this.y); + }, + translate: function(x, y) { + return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y); + }, + apply: function(point) { + return [point[0] * this.k + this.x, point[1] * this.k + this.y]; + }, + applyX: function(x) { + return x * this.k + this.x; + }, + applyY: function(y) { + return y * this.k + this.y; + }, + invert: function(location) { + return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k]; + }, + invertX: function(x) { + return (x - this.x) / this.k; + }, + invertY: function(y) { + return (y - this.y) / this.k; + }, + rescaleX: function(x) { + return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x)); + }, + rescaleY: function(y) { + return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y)); + }, + toString: function() { + return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")"; + } +}; -azimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) { - return 2 * asin$1(z / 2); -}); +var identity$8 = new Transform(1, 0, 0); -var azimuthalEqualArea = function() { - return projection(azimuthalEqualAreaRaw) - .scale(124.75) - .clipAngle(180 - 1e-3); -}; +transform$1.prototype = Transform.prototype; -var azimuthalEquidistantRaw = azimuthalRaw(function(c) { - return (c = acos(c)) && c / sin$1(c); -}); +function transform$1(node) { + return node.__zoom || identity$8; +} -azimuthalEquidistantRaw.invert = azimuthalInvert(function(z) { - return z; -}); +function nopropagation$2() { + exports.event.stopImmediatePropagation(); +} -var azimuthalEquidistant = function() { - return projection(azimuthalEquidistantRaw) - .scale(79.4188) - .clipAngle(180 - 1e-3); +var noevent$2 = function() { + exports.event.preventDefault(); + exports.event.stopImmediatePropagation(); }; -function mercatorRaw(lambda, phi) { - return [lambda, log$1(tan((halfPi$3 + phi) / 2))]; +// Ignore right-click, since that should open the context menu. +function defaultFilter$2() { + return !exports.event.button; } -mercatorRaw.invert = function(x, y) { - return [x, 2 * atan(exp(y)) - halfPi$3]; -}; +function defaultExtent$1() { + var e = this, w, h; + if (e instanceof SVGElement) { + e = e.ownerSVGElement || e; + w = e.width.baseVal.value; + h = e.height.baseVal.value; + } else { + w = e.clientWidth; + h = e.clientHeight; + } + return [[0, 0], [w, h]]; +} -var mercator = function() { - return mercatorProjection(mercatorRaw) - .scale(961 / tau$4); -}; +function defaultTransform() { + return this.__zoom || identity$8; +} + +var zoom = function() { + var filter = defaultFilter$2, + extent = defaultExtent$1, + k0 = 0, + k1 = Infinity, + x0 = -k1, + x1 = k1, + y0 = x0, + y1 = x1, + duration = 250, + interpolate$$1 = interpolateZoom, + gestures = [], + listeners = dispatch("start", "zoom", "end"), + touchstarting, + touchending, + touchDelay = 500, + wheelDelay = 150; + + function zoom(selection$$1) { + selection$$1 + .on("wheel.zoom", wheeled) + .on("mousedown.zoom", mousedowned) + .on("dblclick.zoom", dblclicked) + .on("touchstart.zoom", touchstarted) + .on("touchmove.zoom", touchmoved) + .on("touchend.zoom touchcancel.zoom", touchended) + .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)") + .property("__zoom", defaultTransform); + } -function mercatorProjection(project) { - var m = projection(project), - scale = m.scale, - translate = m.translate, - clipExtent = m.clipExtent, - clipAuto; + zoom.transform = function(collection, transform) { + var selection$$1 = collection.selection ? collection.selection() : collection; + selection$$1.property("__zoom", defaultTransform); + if (collection !== selection$$1) { + schedule(collection, transform); + } else { + selection$$1.interrupt().each(function() { + gesture(this, arguments) + .start() + .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform) + .end(); + }); + } + }; - m.scale = function(_) { - return arguments.length ? (scale(_), clipAuto && m.clipExtent(null), m) : scale(); + zoom.scaleBy = function(selection$$1, k) { + zoom.scaleTo(selection$$1, function() { + var k0 = this.__zoom.k, + k1 = typeof k === "function" ? k.apply(this, arguments) : k; + return k0 * k1; + }); }; - m.translate = function(_) { - return arguments.length ? (translate(_), clipAuto && m.clipExtent(null), m) : translate(); + zoom.scaleTo = function(selection$$1, k) { + zoom.transform(selection$$1, function() { + var e = extent.apply(this, arguments), + t0 = this.__zoom, + p0 = centroid(e), + p1 = t0.invert(p0), + k1 = typeof k === "function" ? k.apply(this, arguments) : k; + return constrain(translate(scale(t0, k1), p0, p1), e); + }); }; - m.clipExtent = function(_) { - if (!arguments.length) return clipAuto ? null : clipExtent(); - if (clipAuto = _ == null) { - var k = pi$4 * scale(), - t = translate(); - _ = [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]]; - } - clipExtent(_); - return m; + zoom.translateBy = function(selection$$1, x, y) { + zoom.transform(selection$$1, function() { + return constrain(this.__zoom.translate( + typeof x === "function" ? x.apply(this, arguments) : x, + typeof y === "function" ? y.apply(this, arguments) : y + ), extent.apply(this, arguments)); + }); }; - return m.clipExtent(null); -} + function scale(transform, k) { + k = Math.max(k0, Math.min(k1, k)); + return k === transform.k ? transform : new Transform(k, transform.x, transform.y); + } -function tany(y) { - return tan((halfPi$3 + y) / 2); -} + function translate(transform, p0, p1) { + var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k; + return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y); + } -function conicConformalRaw(y0, y1) { - var cy0 = cos$1(y0), - n = y0 === y1 ? sin$1(y0) : log$1(cy0 / cos$1(y1)) / log$1(tany(y1) / tany(y0)), - f = cy0 * pow$1(tany(y0), n) / n; + function constrain(transform, extent) { + var dx0 = transform.invertX(extent[0][0]) - x0, + dx1 = transform.invertX(extent[1][0]) - x1, + dy0 = transform.invertY(extent[0][1]) - y0, + dy1 = transform.invertY(extent[1][1]) - y1; + return transform.translate( + dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), + dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1) + ); + } - if (!n) return mercatorRaw; + function centroid(extent) { + return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2]; + } - function project(x, y) { - if (f > 0) { if (y < -halfPi$3 + epsilon$4) y = -halfPi$3 + epsilon$4; } - else { if (y > halfPi$3 - epsilon$4) y = halfPi$3 - epsilon$4; } - var r = f / pow$1(tany(y), n); - return [r * sin$1(n * x), f - r * cos$1(n * x)]; + function schedule(transition$$1, transform, center) { + transition$$1 + .on("start.zoom", function() { gesture(this, arguments).start(); }) + .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); }) + .tween("zoom", function() { + var that = this, + args = arguments, + g = gesture(that, args), + e = extent.apply(that, args), + p = center || centroid(e), + w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]), + a = that.__zoom, + b = typeof transform === "function" ? transform.apply(that, args) : transform, + i = interpolate$$1(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k)); + return function(t) { + if (t === 1) t = b; // Avoid rounding error on end. + else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); } + g.zoom(null, t); + }; + }); } - project.invert = function(x, y) { - var fy = f - y, r = sign$1(n) * sqrt$1(x * x + fy * fy); - return [atan2(x, abs(fy)) / n * sign$1(fy), 2 * atan(pow$1(f / r, 1 / n)) - halfPi$3]; - }; + function gesture(that, args) { + for (var i = 0, n = gestures.length, g; i < n; ++i) { + if ((g = gestures[i]).that === that) { + return g; + } + } + return new Gesture(that, args); + } - return project; -} + function Gesture(that, args) { + this.that = that; + this.args = args; + this.index = -1; + this.active = 0; + this.extent = extent.apply(that, args); + } -var conicConformal = function() { - return conicProjection(conicConformalRaw) - .scale(109.5) - .parallels([30, 30]); -}; + Gesture.prototype = { + start: function() { + if (++this.active === 1) { + this.index = gestures.push(this) - 1; + this.emit("start"); + } + return this; + }, + zoom: function(key, transform) { + if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]); + if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]); + if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]); + this.that.__zoom = transform; + this.emit("zoom"); + return this; + }, + end: function() { + if (--this.active === 0) { + gestures.splice(this.index, 1); + this.index = -1; + this.emit("end"); + } + return this; + }, + emit: function(type) { + customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]); + } + }; -function equirectangularRaw(lambda, phi) { - return [lambda, phi]; -} + function wheeled() { + if (!filter.apply(this, arguments)) return; + var g = gesture(this, arguments), + t = this.__zoom, + k = Math.max(k0, Math.min(k1, t.k * Math.pow(2, -exports.event.deltaY * (exports.event.deltaMode ? 120 : 1) / 500))), + p = mouse(this); -equirectangularRaw.invert = equirectangularRaw; + // If the mouse is in the same location as before, reuse it. + // If there were recent wheel events, reset the wheel idle timeout. + if (g.wheel) { + if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) { + g.mouse[1] = t.invert(g.mouse[0] = p); + } + clearTimeout(g.wheel); + } -var equirectangular = function() { - return projection(equirectangularRaw) - .scale(152.63); -}; + // If this wheel event won’t trigger a transform change, ignore it. + else if (t.k === k) return; -function conicEquidistantRaw(y0, y1) { - var cy0 = cos$1(y0), - n = y0 === y1 ? sin$1(y0) : (cy0 - cos$1(y1)) / (y1 - y0), - g = cy0 / n + y0; + // Otherwise, capture the mouse point and location at the start. + else { + g.mouse = [p, t.invert(p)]; + interrupt(this); + g.start(); + } - if (abs(n) < epsilon$4) return equirectangularRaw; + noevent$2(); + g.wheel = setTimeout(wheelidled, wheelDelay); + g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent)); - function project(x, y) { - var gy = g - y, nx = n * x; - return [gy * sin$1(nx), g - gy * cos$1(nx)]; + function wheelidled() { + g.wheel = null; + g.end(); + } } - project.invert = function(x, y) { - var gy = g - y; - return [atan2(x, abs(gy)) / n * sign$1(gy), g - sign$1(n) * sqrt$1(x * x + gy * gy)]; - }; + function mousedowned() { + if (touchending || !filter.apply(this, arguments)) return; + var g = gesture(this, arguments), + v = select(exports.event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true), + p = mouse(this); - return project; -} + dragDisable(exports.event.view); + nopropagation$2(); + g.mouse = [p, this.__zoom.invert(p)]; + interrupt(this); + g.start(); -var conicEquidistant = function() { - return conicProjection(conicEquidistantRaw) - .scale(131.154) - .center([0, 13.9389]); -}; + function mousemoved() { + noevent$2(); + g.moved = true; + g.zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent)); + } -function gnomonicRaw(x, y) { - var cy = cos$1(y), k = cos$1(x) * cy; - return [cy * sin$1(x) / k, sin$1(y) / k]; -} + function mouseupped() { + v.on("mousemove.zoom mouseup.zoom", null); + yesdrag(exports.event.view, g.moved); + noevent$2(); + g.end(); + } + } -gnomonicRaw.invert = azimuthalInvert(atan); + function dblclicked() { + if (!filter.apply(this, arguments)) return; + var t0 = this.__zoom, + p0 = mouse(this), + p1 = t0.invert(p0), + k1 = t0.k * (exports.event.shiftKey ? 0.5 : 2), + t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments)); -var gnomonic = function() { - return projection(gnomonicRaw) - .scale(144.049) - .clipAngle(60); -}; + noevent$2(); + if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0); + else select(this).call(zoom.transform, t1); + } -function scaleTranslate(kx, ky, tx, ty) { - return kx === 1 && ky === 1 && tx === 0 && ty === 0 ? identity$7 : transformer({ - point: function(x, y) { - this.stream.point(x * kx + tx, y * ky + ty); - } - }); -} + function touchstarted() { + if (!filter.apply(this, arguments)) return; + var g = gesture(this, arguments), + touches$$1 = exports.event.changedTouches, + started, + n = touches$$1.length, i, t, p; -var identity$8 = function() { - var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, transform = identity$7, // scale, translate and reflect - x0 = null, y0, x1, y1, clip = identity$7, // clip extent - cache, - cacheStream, - projection; + nopropagation$2(); + for (i = 0; i < n; ++i) { + t = touches$$1[i], p = touch(this, touches$$1, t.identifier); + p = [p, this.__zoom.invert(p), t.identifier]; + if (!g.touch0) g.touch0 = p, started = true; + else if (!g.touch1) g.touch1 = p; + } - function reset() { - cache = cacheStream = null; - return projection; - } + // If this is a dbltap, reroute to the (optional) dblclick.zoom handler. + if (touchstarting) { + touchstarting = clearTimeout(touchstarting); + if (!g.touch1) { + g.end(); + p = select(this).on("dblclick.zoom"); + if (p) p.apply(this, arguments); + return; + } + } - return projection = { - stream: function(stream) { - return cache && cacheStream === stream ? cache : cache = transform(clip(cacheStream = stream)); - }, - clipExtent: function(_) { - return arguments.length ? (clip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$7) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]]; - }, - scale: function(_) { - return arguments.length ? (transform = scaleTranslate((k = +_) * sx, k * sy, tx, ty), reset()) : k; - }, - translate: function(_) { - return arguments.length ? (transform = scaleTranslate(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty]; - }, - reflectX: function(_) { - return arguments.length ? (transform = scaleTranslate(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0; - }, - reflectY: function(_) { - return arguments.length ? (transform = scaleTranslate(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0; - }, - fitExtent: function(extent, object) { - return fitExtent(projection, extent, object); - }, - fitSize: function(size, object) { - return fitSize(projection, size, object); + if (started) { + touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay); + interrupt(this); + g.start(); } - }; -}; + } -function orthographicRaw(x, y) { - return [cos$1(y) * sin$1(x), sin$1(y)]; -} + function touchmoved() { + var g = gesture(this, arguments), + touches$$1 = exports.event.changedTouches, + n = touches$$1.length, i, t, p, l; -orthographicRaw.invert = azimuthalInvert(asin$1); + noevent$2(); + if (touchstarting) touchstarting = clearTimeout(touchstarting); + for (i = 0; i < n; ++i) { + t = touches$$1[i], p = touch(this, touches$$1, t.identifier); + if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p; + else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p; + } + t = g.that.__zoom; + if (g.touch1) { + var p0 = g.touch0[0], l0 = g.touch0[1], + p1 = g.touch1[0], l1 = g.touch1[1], + dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp, + dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl; + t = scale(t, Math.sqrt(dp / dl)); + p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2]; + l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2]; + } + else if (g.touch0) p = g.touch0[0], l = g.touch0[1]; + else return; + g.zoom("touch", constrain(translate(t, p, l), g.extent)); + } -var orthographic = function() { - return projection(orthographicRaw) - .scale(249.5) - .clipAngle(90 + epsilon$4); -}; + function touchended() { + var g = gesture(this, arguments), + touches$$1 = exports.event.changedTouches, + n = touches$$1.length, i, t; -function stereographicRaw(x, y) { - var cy = cos$1(y), k = 1 + cos$1(x) * cy; - return [cy * sin$1(x) / k, sin$1(y) / k]; -} + nopropagation$2(); + if (touchending) clearTimeout(touchending); + touchending = setTimeout(function() { touchending = null; }, touchDelay); + for (i = 0; i < n; ++i) { + t = touches$$1[i]; + if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0; + else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1; + } + if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1; + if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]); + else g.end(); + } -stereographicRaw.invert = azimuthalInvert(function(z) { - return 2 * atan(z); -}); + zoom.filter = function(_) { + return arguments.length ? (filter = typeof _ === "function" ? _ : constant$12(!!_), zoom) : filter; + }; -var stereographic = function() { - return projection(stereographicRaw) - .scale(250) - .clipAngle(142); -}; + zoom.extent = function(_) { + return arguments.length ? (extent = typeof _ === "function" ? _ : constant$12([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent; + }; -function transverseMercatorRaw(lambda, phi) { - return [log$1(tan((halfPi$3 + phi) / 2)), -lambda]; -} + zoom.scaleExtent = function(_) { + return arguments.length ? (k0 = +_[0], k1 = +_[1], zoom) : [k0, k1]; + }; -transverseMercatorRaw.invert = function(x, y) { - return [-y, 2 * atan(exp(x)) - halfPi$3]; -}; + zoom.translateExtent = function(_) { + return arguments.length ? (x0 = +_[0][0], x1 = +_[1][0], y0 = +_[0][1], y1 = +_[1][1], zoom) : [[x0, y0], [x1, y1]]; + }; -var transverseMercator = function() { - var m = mercatorProjection(transverseMercatorRaw), - center = m.center, - rotate = m.rotate; + zoom.duration = function(_) { + return arguments.length ? (duration = +_, zoom) : duration; + }; - m.center = function(_) { - return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]); + zoom.interpolate = function(_) { + return arguments.length ? (interpolate$$1 = _, zoom) : interpolate$$1; }; - m.rotate = function(_) { - return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]); + zoom.on = function() { + var value = listeners.on.apply(listeners, arguments); + return value === listeners ? zoom : value; }; - return rotate([0, 0, 90]) - .scale(159.155); + return zoom; }; exports.version = version; @@ -16017,6 +16183,7 @@ exports.bisectRight = bisectRight; exports.bisectLeft = bisectLeft; exports.ascending = ascending; exports.bisector = bisector; +exports.cross = cross; exports.descending = descending; exports.deviation = deviation; exports.extent = extent; @@ -16032,7 +16199,7 @@ exports.min = min; exports.pairs = pairs; exports.permute = permute; exports.quantile = threshold; -exports.range = range; +exports.range = sequence; exports.scan = scan; exports.shuffle = shuffle; exports.sum = sum; @@ -16041,19 +16208,42 @@ exports.tickStep = tickStep; exports.transpose = transpose; exports.variance = variance; exports.zip = zip; -exports.entries = entries; +exports.axisTop = axisTop; +exports.axisRight = axisRight; +exports.axisBottom = axisBottom; +exports.axisLeft = axisLeft; +exports.brush = brush; +exports.brushX = brushX; +exports.brushY = brushY; +exports.brushSelection = brushSelection; +exports.chord = chord; +exports.ribbon = ribbon; +exports.nest = nest; +exports.set = set$2; +exports.map = map$1; exports.keys = keys; exports.values = values; -exports.map = map$1; -exports.set = set; -exports.nest = nest; -exports.randomUniform = uniform; -exports.randomNormal = normal; -exports.randomLogNormal = logNormal; -exports.randomBates = bates; -exports.randomIrwinHall = irwinHall; -exports.randomExponential = exponential; -exports.easeLinear = linear; +exports.entries = entries; +exports.color = color; +exports.rgb = rgb; +exports.hsl = hsl; +exports.lab = lab; +exports.hcl = hcl; +exports.cubehelix = cubehelix; +exports.dispatch = dispatch; +exports.drag = drag; +exports.dragDisable = dragDisable; +exports.dragEnable = yesdrag; +exports.dsvFormat = dsv; +exports.csvParse = csvParse; +exports.csvParseRows = csvParseRows; +exports.csvFormat = csvFormat; +exports.csvFormatRows = csvFormatRows; +exports.tsvParse = tsvParse; +exports.tsvParseRows = tsvParseRows; +exports.tsvFormat = tsvFormat; +exports.tsvFormatRows = tsvFormatRows; +exports.easeLinear = linear$1; exports.easeQuad = quadInOut; exports.easeQuadIn = quadIn; exports.easeQuadOut = quadOut; @@ -16090,32 +16280,180 @@ exports.easeElastic = elasticOut; exports.easeElasticIn = elasticIn; exports.easeElasticOut = elasticOut; exports.easeElasticInOut = elasticInOut; -exports.polygonArea = area; -exports.polygonCentroid = centroid; -exports.polygonHull = hull; -exports.polygonContains = contains; -exports.polygonLength = length$1; +exports.forceCenter = center$1; +exports.forceCollide = collide; +exports.forceLink = link; +exports.forceManyBody = manyBody; +exports.forceSimulation = simulation; +exports.forceX = x$2; +exports.forceY = y$2; +exports.formatDefaultLocale = defaultLocale; +exports.formatLocale = formatLocale; +exports.formatSpecifier = formatSpecifier; +exports.precisionFixed = precisionFixed; +exports.precisionPrefix = precisionPrefix; +exports.precisionRound = precisionRound; +exports.geoArea = area; +exports.geoBounds = bounds; +exports.geoCentroid = centroid; +exports.geoCircle = circle; +exports.geoClipExtent = extent$1; +exports.geoContains = contains; +exports.geoDistance = distance; +exports.geoGraticule = graticule; +exports.geoGraticule10 = graticule10; +exports.geoInterpolate = interpolate$1; +exports.geoLength = length$1; +exports.geoPath = index$1; +exports.geoAlbers = albers; +exports.geoAlbersUsa = albersUsa; +exports.geoAzimuthalEqualArea = azimuthalEqualArea; +exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw; +exports.geoAzimuthalEquidistant = azimuthalEquidistant; +exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw; +exports.geoConicConformal = conicConformal; +exports.geoConicConformalRaw = conicConformalRaw; +exports.geoConicEqualArea = conicEqualArea; +exports.geoConicEqualAreaRaw = conicEqualAreaRaw; +exports.geoConicEquidistant = conicEquidistant; +exports.geoConicEquidistantRaw = conicEquidistantRaw; +exports.geoEquirectangular = equirectangular; +exports.geoEquirectangularRaw = equirectangularRaw; +exports.geoGnomonic = gnomonic; +exports.geoGnomonicRaw = gnomonicRaw; +exports.geoIdentity = identity$5; +exports.geoProjection = projection; +exports.geoProjectionMutator = projectionMutator; +exports.geoMercator = mercator; +exports.geoMercatorRaw = mercatorRaw; +exports.geoOrthographic = orthographic; +exports.geoOrthographicRaw = orthographicRaw; +exports.geoStereographic = stereographic; +exports.geoStereographicRaw = stereographicRaw; +exports.geoTransverseMercator = transverseMercator; +exports.geoTransverseMercatorRaw = transverseMercatorRaw; +exports.geoRotation = rotation; +exports.geoStream = geoStream; +exports.geoTransform = transform; +exports.cluster = cluster; +exports.hierarchy = hierarchy; +exports.pack = index$2; +exports.packSiblings = siblings; +exports.packEnclose = enclose; +exports.partition = partition; +exports.stratify = stratify; +exports.tree = tree; +exports.treemap = index$3; +exports.treemapBinary = binary; +exports.treemapDice = treemapDice; +exports.treemapSlice = treemapSlice; +exports.treemapSliceDice = sliceDice; +exports.treemapSquarify = squarify; +exports.treemapResquarify = resquarify; +exports.interpolate = interpolateValue; +exports.interpolateArray = array$1; +exports.interpolateBasis = basis$1; +exports.interpolateBasisClosed = basisClosed; +exports.interpolateDate = date; +exports.interpolateNumber = reinterpolate; +exports.interpolateObject = object; +exports.interpolateRound = interpolateRound; +exports.interpolateString = interpolateString; +exports.interpolateTransformCss = interpolateTransformCss; +exports.interpolateTransformSvg = interpolateTransformSvg; +exports.interpolateZoom = interpolateZoom; +exports.interpolateRgb = interpolateRgb; +exports.interpolateRgbBasis = rgbBasis; +exports.interpolateRgbBasisClosed = rgbBasisClosed; +exports.interpolateHsl = hsl$2; +exports.interpolateHslLong = hslLong; +exports.interpolateLab = lab$1; +exports.interpolateHcl = hcl$2; +exports.interpolateHclLong = hclLong; +exports.interpolateCubehelix = cubehelix$2; +exports.interpolateCubehelixLong = cubehelixLong; +exports.quantize = quantize; exports.path = path; +exports.polygonArea = area$1; +exports.polygonCentroid = centroid$1; +exports.polygonHull = hull; +exports.polygonContains = contains$1; +exports.polygonLength = length$2; exports.quadtree = quadtree; exports.queue = queue; +exports.randomUniform = uniform; +exports.randomNormal = normal; +exports.randomLogNormal = logNormal; +exports.randomBates = bates; +exports.randomIrwinHall = irwinHall; +exports.randomExponential = exponential$1; +exports.request = request; +exports.html = html; +exports.json = json; +exports.text = text; +exports.xml = xml; +exports.csv = csv$1; +exports.tsv = tsv$1; +exports.scaleBand = band; +exports.scalePoint = point$1; +exports.scaleIdentity = identity$6; +exports.scaleLinear = linear$2; +exports.scaleLog = log$1; +exports.scaleOrdinal = ordinal; +exports.scaleImplicit = implicit; +exports.scalePow = pow$1; +exports.scaleSqrt = sqrt$1; +exports.scaleQuantile = quantile$$1; +exports.scaleQuantize = quantize$1; +exports.scaleThreshold = threshold$1; +exports.scaleTime = time; +exports.scaleUtc = utcTime; +exports.schemeCategory10 = category10; +exports.schemeCategory20b = category20b; +exports.schemeCategory20c = category20c; +exports.schemeCategory20 = category20; +exports.interpolateCubehelixDefault = cubehelix$3; +exports.interpolateRainbow = rainbow$1; +exports.interpolateWarm = warm; +exports.interpolateCool = cool; +exports.interpolateViridis = viridis; +exports.interpolateMagma = magma; +exports.interpolateInferno = inferno; +exports.interpolatePlasma = plasma; +exports.scaleSequential = sequential; +exports.creator = creator; +exports.local = local$1; +exports.matcher = matcher$1; +exports.mouse = mouse; +exports.namespace = namespace; +exports.namespaces = namespaces; +exports.select = select; +exports.selectAll = selectAll; +exports.selection = selection; +exports.selector = selector; +exports.selectorAll = selectorAll; +exports.touch = touch; +exports.touches = touches; +exports.window = window; +exports.customEvent = customEvent; exports.arc = arc; -exports.area = area$1; +exports.area = area$2; exports.line = line; exports.pie = pie; exports.radialArea = radialArea; exports.radialLine = radialLine$1; exports.symbol = symbol; exports.symbols = symbols; -exports.symbolCircle = circle; -exports.symbolCross = cross$1; +exports.symbolCircle = circle$2; +exports.symbolCross = cross$2; exports.symbolDiamond = diamond; exports.symbolSquare = square; exports.symbolStar = star; exports.symbolTriangle = triangle; exports.symbolWye = wye; -exports.curveBasisClosed = basisClosed; +exports.curveBasisClosed = basisClosed$1; exports.curveBasisOpen = basisOpen; -exports.curveBasis = basis; +exports.curveBasis = basis$2; exports.curveBundle = bundle; exports.curveCardinalClosed = cardinalClosed; exports.curveCardinalOpen = cardinalOpen; @@ -16133,70 +16471,23 @@ exports.curveStepAfter = stepAfter; exports.curveStepBefore = stepBefore; exports.stack = stack; exports.stackOffsetExpand = expand; -exports.stackOffsetNone = none; +exports.stackOffsetNone = none$1; exports.stackOffsetSilhouette = silhouette; exports.stackOffsetWiggle = wiggle; -exports.stackOrderAscending = ascending$1; +exports.stackOrderAscending = ascending$2; exports.stackOrderDescending = descending$2; exports.stackOrderInsideOut = insideOut; -exports.stackOrderNone = none$1; +exports.stackOrderNone = none$2; exports.stackOrderReverse = reverse; -exports.color = color; -exports.rgb = rgb; -exports.hsl = hsl; -exports.lab = lab; -exports.hcl = hcl; -exports.cubehelix = cubehelix; -exports.interpolate = interpolate; -exports.interpolateArray = array$1; -exports.interpolateDate = date; -exports.interpolateNumber = interpolateNumber; -exports.interpolateObject = object; -exports.interpolateRound = interpolateRound; -exports.interpolateString = interpolateString; -exports.interpolateTransformCss = interpolateTransformCss; -exports.interpolateTransformSvg = interpolateTransformSvg; -exports.interpolateZoom = interpolateZoom; -exports.interpolateRgb = interpolateRgb; -exports.interpolateRgbBasis = rgbBasis; -exports.interpolateRgbBasisClosed = rgbBasisClosed; -exports.interpolateHsl = hsl$2; -exports.interpolateHslLong = hslLong; -exports.interpolateLab = lab$1; -exports.interpolateHcl = hcl$2; -exports.interpolateHclLong = hclLong; -exports.interpolateCubehelix = cubehelix$2; -exports.interpolateCubehelixLong = cubehelixLong; -exports.interpolateBasis = basis$2; -exports.interpolateBasisClosed = basisClosed$1; -exports.quantize = quantize; -exports.dispatch = dispatch; -exports.dsvFormat = dsv; -exports.csvParse = csvParse; -exports.csvParseRows = csvParseRows; -exports.csvFormat = csvFormat; -exports.csvFormatRows = csvFormatRows; -exports.tsvParse = tsvParse; -exports.tsvParseRows = tsvParseRows; -exports.tsvFormat = tsvFormat; -exports.tsvFormatRows = tsvFormatRows; -exports.request = request; -exports.html = html; -exports.json = json; -exports.text = text; -exports.xml = xml; -exports.csv = csv$1; -exports.tsv = tsv$1; -exports.now = now; -exports.timer = timer; -exports.timerFlush = timerFlush; -exports.timeout = timeout$1; -exports.interval = interval$1; exports.timeInterval = newInterval; exports.timeMillisecond = millisecond; exports.timeMilliseconds = milliseconds; +exports.utcMillisecond = millisecond; +exports.utcMilliseconds = milliseconds; exports.timeSecond = second; exports.timeSeconds = seconds; +exports.utcSecond = second; +exports.utcSeconds = seconds; exports.timeMinute = minute; exports.timeMinutes = minutes; exports.timeHour = hour; @@ -16223,10 +16514,6 @@ exports.timeMonth = month; exports.timeMonths = months; exports.timeYear = year; exports.timeYears = years; -exports.utcMillisecond = millisecond; -exports.utcMilliseconds = milliseconds; -exports.utcSecond = second; -exports.utcSeconds = seconds; exports.utcMinute = utcMinute; exports.utcMinutes = utcMinutes; exports.utcHour = utcHour; @@ -16253,1145 +16540,1026 @@ exports.utcMonth = utcMonth; exports.utcMonths = utcMonths; exports.utcYear = utcYear; exports.utcYears = utcYears; -exports.formatLocale = formatLocale; -exports.formatDefaultLocale = defaultLocale; -exports.formatSpecifier = formatSpecifier; -exports.precisionFixed = precisionFixed; -exports.precisionPrefix = precisionPrefix; -exports.precisionRound = precisionRound; -exports.isoFormat = formatIso; -exports.isoParse = parseIso; -exports.timeFormatLocale = formatLocale$1; exports.timeFormatDefaultLocale = defaultLocale$1; -exports.scaleBand = band; -exports.scalePoint = point$4; -exports.scaleIdentity = identity$4; -exports.scaleLinear = linear$2; -exports.scaleLog = log; -exports.scaleOrdinal = ordinal; -exports.scaleImplicit = implicit; -exports.scalePow = pow; -exports.scaleSqrt = sqrt; -exports.scaleQuantile = quantile$$1; -exports.scaleQuantize = quantize$1; -exports.scaleThreshold = threshold$1; -exports.scaleTime = time; -exports.scaleUtc = utcTime; -exports.schemeCategory10 = category10; -exports.schemeCategory20b = category20b; -exports.schemeCategory20c = category20c; -exports.schemeCategory20 = category20; -exports.scaleSequential = sequential; -exports.interpolateCubehelixDefault = cubehelix$3; -exports.interpolateRainbow = rainbow$1; -exports.interpolateWarm = warm; -exports.interpolateCool = cool; -exports.interpolateViridis = viridis; -exports.interpolateMagma = magma; -exports.interpolateInferno = inferno; -exports.interpolatePlasma = plasma; -exports.creator = creator; -exports.customEvent = customEvent; -exports.local = local; -exports.matcher = matcher$1; -exports.mouse = mouse; -exports.namespace = namespace; -exports.namespaces = namespaces; -exports.select = select; -exports.selectAll = selectAll; -exports.selection = selection; -exports.selector = selector; -exports.selectorAll = selectorAll; -exports.touch = touch; -exports.touches = touches; -exports.window = window; -exports.active = active; -exports.interrupt = interrupt; -exports.transition = transition; -exports.axisTop = axisTop; -exports.axisRight = axisRight; -exports.axisBottom = axisBottom; -exports.axisLeft = axisLeft; -exports.cluster = cluster; -exports.hierarchy = hierarchy; -exports.pack = index; -exports.packSiblings = siblings; -exports.packEnclose = enclose; -exports.partition = partition; -exports.stratify = stratify; -exports.tree = tree; -exports.treemap = index$1; -exports.treemapBinary = binary; -exports.treemapDice = treemapDice; -exports.treemapSlice = treemapSlice; -exports.treemapSliceDice = sliceDice; -exports.treemapSquarify = squarify; -exports.treemapResquarify = resquarify; -exports.forceCenter = center$1; -exports.forceCollide = collide; -exports.forceLink = link; -exports.forceManyBody = manyBody; -exports.forceSimulation = simulation; -exports.forceX = x$3; -exports.forceY = y$3; -exports.drag = drag; -exports.dragDisable = dragDisable; -exports.dragEnable = yesdrag; -exports.voronoi = voronoi; -exports.zoom = zoom; -exports.zoomIdentity = identity$6; -exports.zoomTransform = transform; -exports.brush = brush; -exports.brushX = brushX; -exports.brushY = brushY; -exports.brushSelection = brushSelection; -exports.chord = chord; -exports.ribbon = ribbon; -exports.geoAlbers = albers; -exports.geoAlbersUsa = albersUsa; -exports.geoArea = area$2; -exports.geoAzimuthalEqualArea = azimuthalEqualArea; -exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw; -exports.geoAzimuthalEquidistant = azimuthalEquidistant; -exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw; -exports.geoBounds = bounds; -exports.geoCentroid = centroid$1; -exports.geoCircle = circle$1; -exports.geoClipExtent = extent$1; -exports.geoConicConformal = conicConformal; -exports.geoConicConformalRaw = conicConformalRaw; -exports.geoConicEqualArea = conicEqualArea; -exports.geoConicEqualAreaRaw = conicEqualAreaRaw; -exports.geoConicEquidistant = conicEquidistant; -exports.geoConicEquidistantRaw = conicEquidistantRaw; -exports.geoDistance = distance; -exports.geoEquirectangular = equirectangular; -exports.geoEquirectangularRaw = equirectangularRaw; -exports.geoGnomonic = gnomonic; -exports.geoGnomonicRaw = gnomonicRaw; -exports.geoGraticule = graticule; -exports.geoGraticule10 = graticule10; -exports.geoIdentity = identity$8; -exports.geoInterpolate = interpolate$2; -exports.geoLength = length$2; -exports.geoMercator = mercator; -exports.geoMercatorRaw = mercatorRaw; -exports.geoOrthographic = orthographic; -exports.geoOrthographicRaw = orthographicRaw; -exports.geoPath = index$3; -exports.geoProjection = projection; -exports.geoProjectionMutator = projectionMutator; -exports.geoRotation = rotation; -exports.geoStereographic = stereographic; -exports.geoStereographicRaw = stereographicRaw; -exports.geoStream = geoStream; -exports.geoTransform = transform$1; -exports.geoTransverseMercator = transverseMercator; -exports.geoTransverseMercatorRaw = transverseMercatorRaw; - -Object.defineProperty(exports, '__esModule', { value: true }); - -}))); - -},{}],2:[function(require,module,exports){ -// Copyright © 2016 RTE Réseau de transport d’électricité -(function() { - 'use strict'; - - var d3 = require("d3"); - var Chart = require("./chart.js"); - - module.exports = Barchart; - - // Barchart inherits from Chart - Barchart.prototype = Object.create(Chart.prototype); - Barchart.prototype.constructor = Barchart; - - /** - * @class Barchart - * @summary Represent data with a barchart - * @desc Barcharts are polyvalent charts that should be used most of the time. - * In a barchart individual value are visually easy to compare because the - * human eye is good at comparing lengths. Moreover barcharts can represent - * negative values while polar charts can only represent positive values; - * @param {string} el CSS selector representing the element that will hold the chart. - * @param {number[]} data Data the chart has to represent. - * @param {BarchartOptions} options Options controling graphical aspects of the chart. - */ - - /** @typedef {object} BarchartOptions - * @memberOf Barchart - * @prop {number|"auto"} [minValue="auto"] Minimum value data could take. It - * is important to set this option explicitely if one wants to compare - * charts and use the same scale on each one. By default `minValue` equals to 0 - * if all data values are positive or the minimum value if some values are - * negative. - * @prop {number|"auto"} [maxValue="auto"] Maximum value data could take.It - * is important to set this option explicitely if one wants to compare - * charts and use the same scale on each one. By default it equals to 0 if all - * values are negative or to maximmum value if some value is positive. - * @prop {number} [width=60] Width of the chart. - * @prop {number} [height=60] Height of the chart. - * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds. - * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of - * colors or a function `(d, i) -> color` where `d` is a data value and `i` - * is the index of the value.If it is an array with length less than the length - * of data, then the colors are recycled. - * @prop {string[]|"none"|"auto"|function}[labels="none"] Labels to display in bars. - * It can be an array with same length as the data. It can also be a function - * `(d, i) -> labelText` where `d` is a data value and `i` - * is the index of the value. Finally it can be equal to "none" to hide labels - * or "auto" to display in a compact way values. - * @prop {string|string[]|"auto"|function}[labelColors="auto"] Color of the labels. - * It can be a single value or an array with same length as the data. It can - * also be a function `(d, i) -> color` where `d` is a data value and `i` - * is the index of the value. Finally it can be equal to "auto". In this case, - * the most readable color is choosen depding on the color of the bar. - * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is - * not enough space for a given label, then it is hidden. - * @prop {number}[labelMaxSize=24] Label maximum size in pixels. - * @prop {number}[labelPadding=2] Padding to apply to apply to labels. - * @prop {string}[labelClass=""] Labels CSS class. - * @prop {string}[shapeClass=""] bars CSS class. - * @prop {string}[zeroLineStyle="stroke:#333;stroke-width:1;"] CSS style of the - * line representing the zero value. - */ - - /** @method setData - * @desc Update the data represented by the chart - * @instance - * @memberOf Barchart - * @param {number[]} data Data the chart has to represent. - */ - - /** @method setOptions - * @desc Update the graphical options of a chart - * @instance - * @memberOf Barchart - * @param {BarchartOptions} options Options controling graphical aspects of the chart. - */ - - /** @method update - * @desc Update simulatenously data and options of a barchart. - * @instance - * @memberOf Barchart - * @param {number[]} data Data the chart has to represent. - * @param {BarchartOptions} options Options controling graphical aspects of the chart. - */ - function Barchart(el, data, options) { - // Default options - var defaults = { - minValue: "auto", - maxValue: "auto", - zeroLineStyle: "stroke:#333;stroke-width:1;" - }; - - // Call super constructor - Chart.call(this, el, data, options, defaults); - - // Initialize the zero line - var scaleFun = d3.scaleLinear() - .domain([this._options.minValue, this._options.maxValue]) - .range([this._options.height, 0]); - - this._zeroLine = this._container.append("line") - .attr("x1", 0) - .attr("y1", scaleFun(0)) - .attr("x2", this._options.width) - .attr("y2", scaleFun(0)) - .attr("style", this._options.zeroLineStyle); - - this._draw(); - } - - // See comments in chart.js - Barchart.prototype._processOptions = function(options) { - options = Chart.prototype._processOptions.call(this, options, this._options); - - // Set min value and max value if necessary. - if (options.minValue === "auto") { - var min = d3.min(this._data); - var max = options.maxValue === "auto"? d3.max(this._data): options.maxValue; - - if (max > 0 && min > 0) options.minValue = 0; - else options.minValue = min; - } - - if (options.maxValue === "auto") { - var max = options.minValue === "auto"? d3.min(this._data): options.minValue; - var max = d3.max(this._data); - - if (max < 0 && min < 0) options.maxValue = 0; - else options.maxValue = max; - } - - return options; - }; - - // See comments in chart.js - Barchart.prototype._draw = function() { - var self = this; - Chart.prototype._draw.call(this); - - var barWidth = (self._options.width - 6) / self._data.length; - var scaleFun = d3.scaleLinear() - .domain([self._options.minValue, self._options.maxValue]) - .range([self._options.height, 0]); - - // Update the zero line - self._zeroLine - .transition() - .duration(self._options.transitionTime) - .attr("x1", 0) - .attr("y1", scaleFun(0)) - .attr("x2", self._options.width) - .attr("y2", scaleFun(0)) - .attr("style", self._options.zeroLineStyle); - - // Update bars - var bar = self._chart.selectAll("path").data(self._data); - // Add new bars - function rectPath(x, y, w, h) { - return ("M" + x + " " + y + "l" + w + " 0l0 " + h + "l" + (-w) + " 0Z") - } - - bar.enter() - .append("path") - .attr("d", function(d, i) {return rectPath((i + 1) * barWidth + 3, scaleFun(0), 0, 0)}) - // Update bars - .merge(bar) - .attr("class", self._options.shapeClass) - .transition() - .duration(self._options.transitionTime) - .attr("d", function(d, i) {return rectPath(i * barWidth + 3, scaleFun(0), barWidth, scaleFun(d) - scaleFun(0))}) - .attr("fill", self._options.colorFun); - // Remove bars - bar.exit() - .transition() - .duration(self._options.transitionTime) - .attr("x", function(d, i) {return i * barWidth + 3;}) - .attr("y", 0) - .attr("width", 0) - .attr("height", 0) - .remove(); - - // Add/ update labels - function initLabel(label, d, i) { - label.fillRect( - i * barWidth + 3, scaleFun(0), - barWidth, 0, - self._options.labelPadding, - "center", d >= 0? "top": "bottom", - 0 - ); - } +exports.timeFormatLocale = formatLocale$1; +exports.isoFormat = formatIso; +exports.isoParse = parseIso; +exports.now = now; +exports.timer = timer; +exports.timerFlush = timerFlush; +exports.timeout = timeout$1; +exports.interval = interval$1; +exports.transition = transition; +exports.active = active; +exports.interrupt = interrupt; +exports.voronoi = voronoi; +exports.zoom = zoom; +exports.zoomTransform = transform$1; +exports.zoomIdentity = identity$8; - function updateLabel(label, d, i) { - label.fillRect( - i * barWidth + 3, d >= 0? scaleFun(d) : scaleFun(0), - barWidth, Math.abs(scaleFun(d) - scaleFun(0)), - self._options.labelPadding, - "center", d >= 0? "top": "bottom", - self._options.transitionTime); - } +Object.defineProperty(exports, '__esModule', { value: true }); - this._drawLabels(initLabel, updateLabel); - } +}))); -}()); +},{}],2:[function(require,module,exports){ +// Copyright © 2016 RTE Réseau de transport d’électricité +(function() { + 'use strict'; + + var d3 = require("d3"); + var Chart = require("./chart.js"); + + module.exports = Barchart; + + // Barchart inherits from Chart + Barchart.prototype = Object.create(Chart.prototype); + Barchart.prototype.constructor = Barchart; + + /** + * @class Barchart + * @summary Represent data with a barchart + * @desc Barcharts are polyvalent charts that should be used most of the time. + * In a barchart individual value are visually easy to compare because the + * human eye is good at comparing lengths. Moreover barcharts can represent + * negative values while polar charts can only represent positive values; + * @param {string} el CSS selector representing the element that will hold the chart. + * @param {number[]} data Data the chart has to represent. + * @param {BarchartOptions} options Options controling graphical aspects of the chart. + */ + + /** @typedef {object} BarchartOptions + * @memberOf Barchart + * @prop {number|"auto"} [minValue="auto"] Minimum value data could take. It + * is important to set this option explicitely if one wants to compare + * charts and use the same scale on each one. By default `minValue` equals to 0 + * if all data values are positive or the minimum value if some values are + * negative. + * @prop {number|"auto"} [maxValue="auto"] Maximum value data could take.It + * is important to set this option explicitely if one wants to compare + * charts and use the same scale on each one. By default it equals to 0 if all + * values are negative or to maximmum value if some value is positive. + * @prop {number} [width=60] Width of the chart. + * @prop {number} [height=60] Height of the chart. + * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds. + * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of + * colors or a function `(d, i) -> color` where `d` is a data value and `i` + * is the index of the value.If it is an array with length less than the length + * of data, then the colors are recycled. + * @prop {string[]|"none"|"auto"|function}[labels="none"] Labels to display in bars. + * It can be an array with same length as the data. It can also be a function + * `(d, i) -> labelText` where `d` is a data value and `i` + * is the index of the value. Finally it can be equal to "none" to hide labels + * or "auto" to display in a compact way values. + * @prop {string|string[]|"auto"|function}[labelColors="auto"] Color of the labels. + * It can be a single value or an array with same length as the data. It can + * also be a function `(d, i) -> color` where `d` is a data value and `i` + * is the index of the value. Finally it can be equal to "auto". In this case, + * the most readable color is choosen depding on the color of the bar. + * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is + * not enough space for a given label, then it is hidden. + * @prop {number}[labelMaxSize=24] Label maximum size in pixels. + * @prop {number}[labelPadding=2] Padding to apply to apply to labels. + * @prop {string}[labelClass=""] Labels CSS class. + * @prop {string}[shapeClass=""] bars CSS class. + * @prop {string}[zeroLineStyle="stroke:#333;stroke-width:1;"] CSS style of the + * line representing the zero value. + */ + + /** @method setData + * @desc Update the data represented by the chart + * @instance + * @memberOf Barchart + * @param {number[]} data Data the chart has to represent. + */ + + /** @method setOptions + * @desc Update the graphical options of a chart + * @instance + * @memberOf Barchart + * @param {BarchartOptions} options Options controling graphical aspects of the chart. + */ + + /** @method update + * @desc Update simulatenously data and options of a barchart. + * @instance + * @memberOf Barchart + * @param {number[]} data Data the chart has to represent. + * @param {BarchartOptions} options Options controling graphical aspects of the chart. + */ + function Barchart(el, data, options) { + // Default options + var defaults = { + minValue: "auto", + maxValue: "auto", + zeroLineStyle: "stroke:#333;stroke-width:1;" + }; + + // Call super constructor + Chart.call(this, el, data, options, defaults); + + // Initialize the zero line + var scaleFun = d3.scaleLinear() + .domain([this._options.minValue, this._options.maxValue]) + .range([this._options.height, 0]); + + this._zeroLine = this._container.append("line") + .attr("x1", 0) + .attr("y1", scaleFun(0)) + .attr("x2", this._options.width) + .attr("y2", scaleFun(0)) + .attr("style", this._options.zeroLineStyle); + + this._draw(); + } + + // See comments in chart.js + Barchart.prototype._processOptions = function(options) { + options = Chart.prototype._processOptions.call(this, options, this._options); + + // Set min value and max value if necessary. + if (options.minValue === "auto") { + var min = d3.min(this._data); + var max = options.maxValue === "auto"? d3.max(this._data): options.maxValue; + + if (max > 0 && min > 0) options.minValue = 0; + else options.minValue = min; + } + + if (options.maxValue === "auto") { + var max = options.minValue === "auto"? d3.min(this._data): options.minValue; + var max = d3.max(this._data); + + if (max < 0 && min < 0) options.maxValue = 0; + else options.maxValue = max; + } + + return options; + }; + + // See comments in chart.js + Barchart.prototype._draw = function() { + var self = this; + Chart.prototype._draw.call(this); + + var barWidth = (self._options.width - 6) / self._data.length; + var scaleFun = d3.scaleLinear() + .domain([self._options.minValue, self._options.maxValue]) + .range([self._options.height, 0]); + + // Update the zero line + self._zeroLine + .transition() + .duration(self._options.transitionTime) + .attr("x1", 0) + .attr("y1", scaleFun(0)) + .attr("x2", self._options.width) + .attr("y2", scaleFun(0)) + .attr("style", self._options.zeroLineStyle); + + // Update bars + var bar = self._chart.selectAll("path").data(self._data); + // Add new bars + function rectPath(x, y, w, h) { + return ("M" + x + " " + y + "l" + w + " 0l0 " + h + "l" + (-w) + " 0Z") + } + + bar.enter() + .append("path") + .attr("d", function(d, i) {return rectPath((i + 1) * barWidth + 3, scaleFun(0), 0, 0)}) + // Update bars + .merge(bar) + .attr("class", self._options.shapeClass) + .transition() + .duration(self._options.transitionTime) + .attr("d", function(d, i) {return rectPath(i * barWidth + 3, scaleFun(0), barWidth, scaleFun(d) - scaleFun(0))}) + .attr("fill", self._options.colorFun); + // Remove bars + bar.exit() + .transition() + .duration(self._options.transitionTime) + .attr("x", function(d, i) {return i * barWidth + 3;}) + .attr("y", 0) + .attr("width", 0) + .attr("height", 0) + .remove(); + + // Add/ update labels + function initLabel(label, d, i) { + label.fillRect( + i * barWidth + 3, scaleFun(0), + barWidth, 0, + self._options.labelPadding, + "center", d >= 0? "top": "bottom", + 0 + ); + } + + function updateLabel(label, d, i) { + label.fillRect( + i * barWidth + 3, d >= 0? scaleFun(d) : scaleFun(0), + barWidth, Math.abs(scaleFun(d) - scaleFun(0)), + self._options.labelPadding, + "center", d >= 0? "top": "bottom", + self._options.transitionTime); + } + + this._drawLabels(initLabel, updateLabel); + } + +}()); },{"./chart.js":3,"d3":1}],3:[function(require,module,exports){ -// Copyright © 2016 RTE Réseau de transport d’électricité -(function() { - 'use strict'; - - var d3 = require("d3"); - var tinycolor = require("tinycolor2"); - var utils = require("./utils.js"); - var Label = require("./label.js") - - module.exports = Chart; - - /* @class Chart - * Abstract class inherited by other classes - * @param{string} el - * @param{number[]} data - * @param {object} options - * @param {object} defaults - * - */ - function Chart(el, data, options, defaults) { - this._data = data; - - // Merge options with default options of this class and of the child class - /** - * @prop {number} [height=60] width - * @prop {number} [width=60] height - * @prop {number} [transitionTime=750] transitionTime - * @prop {string[]|function} [colors=d3.schemeCategory10] colors - * @prop {string[]|"none"|"auto"|function} [labels="none"] labels - * @prop {string[]|"auto"|function} [labelColors="auto"] labelColors - * @prop {number} [labelMinSize=8] labelMinSize - * @prop {number} [labelMaxSize=24] labelMaxSize - * @prop {number} [labelPadding=2] labelPadding - * @prop {labelClass} [labelClass=""]labelClass - * @prop {shapeClass} [shapeClass=""] shapeClass - */ - this._options = { - width:60, - height: 60, - transitionTime: 750, - colors: d3.schemeCategory10, - labels: "none", - labelColors: "auto", - labelMinSize: 8, - labelMaxSize: 24, - labelPadding: 2, - labelClass: "", - shapeClass: "" - }; - this._options = utils.mergeOptions(this._options, defaults || {}); - this._options = this._processOptions(options); - - // Remove everything in the container and create required elements - d3.select(el).select("*").remove(); - this._container = d3.select(el).append("svg") - .attr("width", this._options.width) - .attr("height", this._options.height); - this._chart = this._container.append("g"); - } - - /* Update data and options of a chart - * - */ - Chart.prototype.update = function(data, options) { - this._data = data; - this._options = this._processOptions(options); - this._draw(); - }; - - Chart.prototype.setOptions = function(options) { - this._options = this._processOptions(options); - this._draw(); - }; - - Chart.prototype.setData = function(data) { - this._data = data; - this._draw(); - }; - - Chart.prototype._draw = function() { - var self = this; - // Update container size - self._container - .transition() - .duration(self._options.transitionTime) - .attr("width", self._options.width) - .attr("height", self._options.height); - }; - - Chart.prototype._processOptions = function(options) { - options = utils.mergeOptions(options, this._options); - - // Convert parameters colors, labels and labelColors to functions - options.colorFun = utils.toFunction(options.colors); - options.labelClass = utils.toFunction(options.labelClass); - options.shapeClass = utils.toFunction(options.shapeClass); - - if (options.labels === "none") { - options.labelText = null; - } else if (options.labels === "auto") { - options.labelText = utils.prettyNumber; - } else { - options.labelText = utils.toFunction(options.labels); - } - - if (options.labelColors === "auto") { - options.labelColorFun = function(d, i) { - return tinycolor.mostReadable(options.colorFun(d, i), ["white", "black"])._originalInput - }; - } else { - options.labelColorFun = utils.toFunction(options.labelColorFun); - } - - return options; - } - - Chart.prototype._drawLabels = function(initFun, updateFun) { - var self = this; - - if (self._options.labels === "none") { - self._chart.selectAll(".labels-container").remove(); - return; - } - - - self._labels = self._chart.selectAll(".labels-container").data(self._data); - self._labels.enter() - .append("g") - .attr("class", "labels-container") - .each(function(d, i) { - this._label = new Label(this, self._options.labelStyle, self._options.labelColorFun(d, i), - self._options.labelMinSize, self._options.labelMaxSize); - this._label.updateText(self._options.labelText(d, i)) - initFun(this._label, d, i); - }) - - .merge(self._labels) - .each(function(d, i) { - this._label.updateText(self._options.labelText(d, i)); - this._label._text - .attr("fill", self._options.labelColorFun(d, i)) - .attr("class", self._options.labelClass(d, i)); - updateFun(this._label, d, i); - }); - - self._labels.exit().remove(); - } - -}()); +// Copyright © 2016 RTE Réseau de transport d’électricité +(function() { + 'use strict'; + + var d3 = require("d3"); + var tinycolor = require("tinycolor2"); + var utils = require("./utils.js"); + var Label = require("./label.js") + + module.exports = Chart; + + /* @class Chart + * Abstract class inherited by other classes + * @param{string} el + * @param{number[]} data + * @param {object} options + * @param {object} defaults + * + */ + function Chart(el, data, options, defaults) { + this._data = data; + + // Merge options with default options of this class and of the child class + /** + * @prop {number} [height=60] width + * @prop {number} [width=60] height + * @prop {number} [transitionTime=750] transitionTime + * @prop {string[]|function} [colors=d3.schemeCategory10] colors + * @prop {string[]|"none"|"auto"|function} [labels="none"] labels + * @prop {string[]|"auto"|function} [labelColors="auto"] labelColors + * @prop {number} [labelMinSize=8] labelMinSize + * @prop {number} [labelMaxSize=24] labelMaxSize + * @prop {number} [labelPadding=2] labelPadding + * @prop {labelClass} [labelClass=""]labelClass + * @prop {shapeClass} [shapeClass=""] shapeClass + */ + this._options = { + width:60, + height: 60, + transitionTime: 750, + colors: d3.schemeCategory10, + labels: "none", + labelColors: "auto", + labelMinSize: 8, + labelMaxSize: 24, + labelPadding: 2, + labelClass: "", + shapeClass: "" + }; + this._options = utils.mergeOptions(this._options, defaults || {}); + this._options = this._processOptions(options); + + // Remove everything in the container and create required elements + d3.select(el).select("*").remove(); + this._container = d3.select(el).append("svg") + .attr("width", this._options.width) + .attr("height", this._options.height); + this._chart = this._container.append("g"); + } + + /* Update data and options of a chart + * + */ + Chart.prototype.update = function(data, options) { + this._data = data; + this._options = this._processOptions(options); + this._draw(); + }; + + Chart.prototype.setOptions = function(options) { + this._options = this._processOptions(options); + this._draw(); + }; + + Chart.prototype.setData = function(data) { + this._data = data; + this._draw(); + }; + + Chart.prototype._draw = function() { + var self = this; + // Update container size + self._container + .transition() + .duration(self._options.transitionTime) + .attr("width", self._options.width) + .attr("height", self._options.height); + }; + + Chart.prototype._processOptions = function(options) { + options = utils.mergeOptions(options, this._options); + + // Convert parameters colors, labels and labelColors to functions + options.colorFun = utils.toFunction(options.colors); + options.labelClass = utils.toFunction(options.labelClass); + options.shapeClass = utils.toFunction(options.shapeClass); + + if (options.labels === "none") { + options.labelText = null; + } else if (options.labels === "auto") { + options.labelText = utils.prettyNumber; + } else { + options.labelText = utils.toFunction(options.labels); + } + + if (options.labelColors === "auto") { + options.labelColorFun = function(d, i) { + return tinycolor.mostReadable(options.colorFun(d, i), ["white", "black"])._originalInput + }; + } else { + options.labelColorFun = utils.toFunction(options.labelColorFun); + } + + return options; + } + + Chart.prototype._drawLabels = function(initFun, updateFun) { + var self = this; + + if (self._options.labels === "none") { + self._chart.selectAll(".labels-container").remove(); + return; + } + + + self._labels = self._chart.selectAll(".labels-container").data(self._data); + self._labels.enter() + .append("g") + .attr("class", "labels-container") + .each(function(d, i) { + this._label = new Label(this, self._options.labelStyle, self._options.labelColorFun(d, i), + self._options.labelMinSize, self._options.labelMaxSize); + this._label.updateText(self._options.labelText(d, i)) + initFun(this._label, d, i); + }) + + .merge(self._labels) + .each(function(d, i) { + this._label.updateText(self._options.labelText(d, i)); + this._label._text + .attr("fill", self._options.labelColorFun(d, i)) + .attr("class", self._options.labelClass(d, i)); + updateFun(this._label, d, i); + }); + + self._labels.exit().remove(); + } + +}()); },{"./label.js":5,"./utils.js":9,"d3":1,"tinycolor2":10}],4:[function(require,module,exports){ -// Copyright © 2016 RTE Réseau de transport d’électricité -(function() { - 'use strict'; - - module.exports.Point = Point; - module.exports.Line = Line; - module.exports.intersectionOfTwoLines = intersectionOfTwoLines; - module.exports.intersectionLineAndCircle = intersectionLineAndCircle; - module.exports.pointInSegment = pointInSegment; - module.exports.intersectionLineRadius = intersectionLineRadius ; - module.exports.distance = distance; - - function Point(x, y) { - this.x = x; - this.y = y; - } - - function Line(a, b) { - this.a = a; - this.b = b - } - Line.prototype.getY = function(x) { - return this.a + this.b * x; - } - - function intersectionOfTwoLines(l1, l2) { - if (l1.b == l2.b) return [] - return [new Point( - (l2.a - l1.a) / (l1.b - l2.b), - (l1.b * l2.a - l1.a * l2.b) / (l1.b - l2.b) - )] - } - - function intersectionLineRadius(l, angle, radius) { - var l2 = new Line(0, Math.tan(angle)); - var intersect = intersectionOfTwoLines(l, l2); - var s1 = new Point(0, 0); - var s2 = new Point(radius * Math.cos(angle), radius * Math.sin(angle)); - - if (intersect.length == 0 || !pointInSegment(intersect[0], s1, s2)) { - return []; - } else { - return intersect; - } - } - - function intersectionLineAndCircle(l, r) { - var x = solveEqSecondDegree(l.b * l.b + 1, 2 * l.a * l.b, l.a * l.a - r * r); - return x.map(function(x) {return new Point(x, l.getY(x))}); - } - - // Is point p inside the segment defined by s1 and s2. It is assumed that the - // three points are aligned. - function pointInSegment(p, s1, s2) { - var kp = dotProd(pointDiff(s2, s1), pointDiff(p, s1)); - var ks = dotProd(pointDiff(s2, s1), pointDiff(s2, s1)); - return kp >= 0 && kp <= ks; - } - - function pointDiff(p1, p2) { - return new Point(p1.x - p2.x, p1.y - p2.y); - } - - function dotProd(p1, p2) { - return p1.x * p2.x + p1.y * p2.y; - } - - function solveEqSecondDegree(a, b, c) { - var det = b * b - 4 * a * c - if (det < 0) return []; - if (det == 0) return [(- b) / (2 * a)]; - else return [ - (-b - Math.sqrt(det)) / (2 * a), - (-b + Math.sqrt(det)) / (2 * a) - ] - } - - function distance(p1, p2) { - return Math.sqrt( Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2)) - } -}()); +// Copyright © 2016 RTE Réseau de transport d’électricité +(function() { + 'use strict'; + + module.exports.Point = Point; + module.exports.Line = Line; + module.exports.intersectionOfTwoLines = intersectionOfTwoLines; + module.exports.intersectionLineAndCircle = intersectionLineAndCircle; + module.exports.pointInSegment = pointInSegment; + module.exports.intersectionLineRadius = intersectionLineRadius ; + module.exports.distance = distance; + + function Point(x, y) { + this.x = x; + this.y = y; + } + + function Line(a, b) { + this.a = a; + this.b = b + } + Line.prototype.getY = function(x) { + return this.a + this.b * x; + } + + function intersectionOfTwoLines(l1, l2) { + if (l1.b == l2.b) return [] + return [new Point( + (l2.a - l1.a) / (l1.b - l2.b), + (l1.b * l2.a - l1.a * l2.b) / (l1.b - l2.b) + )] + } + + function intersectionLineRadius(l, angle, radius) { + var l2 = new Line(0, Math.tan(angle)); + var intersect = intersectionOfTwoLines(l, l2); + var s1 = new Point(0, 0); + var s2 = new Point(radius * Math.cos(angle), radius * Math.sin(angle)); + + if (intersect.length == 0 || !pointInSegment(intersect[0], s1, s2)) { + return []; + } else { + return intersect; + } + } + + function intersectionLineAndCircle(l, r) { + var x = solveEqSecondDegree(l.b * l.b + 1, 2 * l.a * l.b, l.a * l.a - r * r); + return x.map(function(x) {return new Point(x, l.getY(x))}); + } + + // Is point p inside the segment defined by s1 and s2. It is assumed that the + // three points are aligned. + function pointInSegment(p, s1, s2) { + var kp = dotProd(pointDiff(s2, s1), pointDiff(p, s1)); + var ks = dotProd(pointDiff(s2, s1), pointDiff(s2, s1)); + return kp >= 0 && kp <= ks; + } + + function pointDiff(p1, p2) { + return new Point(p1.x - p2.x, p1.y - p2.y); + } + + function dotProd(p1, p2) { + return p1.x * p2.x + p1.y * p2.y; + } + + function solveEqSecondDegree(a, b, c) { + var det = b * b - 4 * a * c + if (det < 0) return []; + if (det == 0) return [(- b) / (2 * a)]; + else return [ + (-b - Math.sqrt(det)) / (2 * a), + (-b + Math.sqrt(det)) / (2 * a) + ] + } + + function distance(p1, p2) { + return Math.sqrt( Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2)) + } +}()); },{}],5:[function(require,module,exports){ -// Copyright © 2016 RTE Réseau de transport d’électricité -(function() { - 'use strict'; - - var d3 = require("d3"); - var g = require("./geometry.js") - - module.exports = Label; - - function Label(el, style, color, minSize, maxSize) { - this._el = el; - this._minSize = minSize; - this._maxSize = maxSize; - this._container = d3.select(el); - this._label = this._container.append("g") - .attr("class", "label"); - - this._text = this._label.append("text") - .attr("dy", "0.35em") - .attr("text-anchor", "middle") - .attr("style", style || "") - .attr("fill", color || "black"); - } - - // Size of the label before scaling - Label.prototype.innerSize = function() { - return this._text.node().getBBox(); - } - - Label.prototype.size = function() { - var bbox = this.innerSize(); - return { - width: bbox.width * this._scale, - height: bbox.height * this._scale - } - } - - Label.prototype.updateText = function(newText) { - // New label should fit in the old bounding bbox - var oldSize = this.size(); - this._text.text(newText); - var newSize = this.size(); - - var scale = Math.min( - oldSize.width / newSize.width, - oldSize.height / newSize.height - ); - this.updateScale(this._scale * scale, 0); - return this; - } - - Label.prototype.updatePosition = function(x, y, transitionTime) { - this._container - .transition() - .duration(transitionTime || 0) - .attr("transform", "translate(" + x + "," + y + ")"); - return this; - } - - Label.prototype.updateScale = function(newScale, transitionTime) { - if (!newScale || isNaN(newScale) || !isFinite(newScale)) { - newScale = 0; - } - var newHeight = this.innerSize().height * newScale; - if (this._minSize && newHeight < this._minSize) { - newScale = 0; - } - if (this._maxSize && newHeight > this._maxSize) { - newScale = this._maxSize / this.innerSize().height; - } - this._label - .transition() - .duration(transitionTime || 0) - .attr("transform", "scale(" + newScale + ")"); - this._scale = newScale; - - return this; - } - - Label.prototype.fillRect = function(x, y, width, height, padding, - hAlign, vAlign, - transitionTime) { - var bbox = this.innerSize(); - this.updateScale(Math.min( - (width - 2 * padding) / bbox.width, - (Math.abs(height)) / bbox.height - ), transitionTime); - - var lsize = this.size(); - var lx, ly; - switch(vAlign) { - case "top": - ly = y + lsize.height / 2; - break; - case "center": - ly = y + (height) / 2; - break; - case "bottom": - ly = y + height - lsize.height / 2; - } - - switch(hAlign) { - case "left": - lx = x + padding + lsize.width / 2; - break; - case "center": - lx = x + width / 2; - break; - case "right": - lx = x + width - padding - lsize.width / 2; - } - - this.updatePosition(lx, ly, transitionTime); - - return this; - } - - Label.prototype.fillCircle = function(radius, transitionTime) { - this.updatePosition(0, 0, transitionTime); - - var bbox = this.innerSize(); - var ratio = bbox.height / bbox.width; - - var maxHeight = radius * 2 * Math.cos(Math.PI/2 - Math.atan(ratio)) - this.updateScale(maxHeight / bbox.height, transitionTime); - } - - Label.prototype.fillSlice = function(arc, radius, d, transitionTime) { - var c = arc.centroid(d); - this.updatePosition(c[0], c[1], transitionTime); - - var bbox = this.innerSize(); - var ratio = bbox.height / bbox.width; - - // Get maximal scale so that label fits in the slice. - var diag1 = new g.Line(c[1] - ratio * c[0], ratio); - var diag2 = new g.Line(c[1] + ratio * c[0], -ratio); - var limit1 = new g.Line(0, Math.tan(d.startAngle + Math.PI/2)); - var limit2 = new g.Line(0, Math.tan(d.endAngle + Math.PI/2)); - - // Get all intersection points - var intersects = []; - intersects = intersects.concat(g.intersectionLineRadius(diag1, d.startAngle - Math.PI/2, radius)); - intersects = intersects.concat(g.intersectionLineRadius(diag1, d.endAngle - Math.PI/2, radius)); - intersects = intersects.concat(g.intersectionLineAndCircle(diag1, radius)); - intersects = intersects.concat(g.intersectionLineRadius(diag2, d.startAngle - Math.PI/2, radius)); - intersects = intersects.concat(g.intersectionLineRadius(diag2, d.endAngle - Math.PI/2, radius)); - intersects = intersects.concat(g.intersectionLineAndCircle(diag2, radius)); - - // Compute distance between all these points and take the minimum - var center = new g.Point(c[0], c[1]); - var distances = intersects.map(function(x) {return g.distance(center, x)}); - var minDist = d3.min(distances); - var actualDist = Math.sqrt( Math.pow(bbox.height / 2, 2) + Math.pow(bbox.width / 2, 2)); - - this.updateScale(minDist / actualDist, transitionTime); - } -}()); +// Copyright © 2016 RTE Réseau de transport d’électricité +(function() { + 'use strict'; + + var d3 = require("d3"); + var g = require("./geometry.js") + + module.exports = Label; + + function Label(el, style, color, minSize, maxSize) { + this._el = el; + this._minSize = minSize; + this._maxSize = maxSize; + this._container = d3.select(el); + this._label = this._container.append("g") + .attr("class", "label"); + + this._text = this._label.append("text") + .attr("dy", "0.35em") + .attr("text-anchor", "middle") + .attr("style", style || "") + .attr("fill", color || "black"); + } + + // Size of the label before scaling + Label.prototype.innerSize = function() { + return this._text.node().getBBox(); + } + + Label.prototype.size = function() { + var bbox = this.innerSize(); + return { + width: bbox.width * this._scale, + height: bbox.height * this._scale + } + } + + Label.prototype.updateText = function(newText) { + // New label should fit in the old bounding bbox + var oldSize = this.size(); + this._text.text(newText); + var newSize = this.size(); + + var scale = Math.min( + oldSize.width / newSize.width, + oldSize.height / newSize.height + ); + this.updateScale(this._scale * scale, 0); + return this; + } + + Label.prototype.updatePosition = function(x, y, transitionTime) { + this._container + .transition() + .duration(transitionTime || 0) + .attr("transform", "translate(" + x + "," + y + ")"); + return this; + } + + Label.prototype.updateScale = function(newScale, transitionTime) { + if (!newScale || isNaN(newScale) || !isFinite(newScale)) { + newScale = 0; + } + var newHeight = this.innerSize().height * newScale; + if (this._minSize && newHeight < this._minSize) { + newScale = 0; + } + if (this._maxSize && newHeight > this._maxSize) { + newScale = this._maxSize / this.innerSize().height; + } + this._label + .transition() + .duration(transitionTime || 0) + .attr("transform", "scale(" + newScale + ")"); + this._scale = newScale; + + return this; + } + + Label.prototype.fillRect = function(x, y, width, height, padding, + hAlign, vAlign, + transitionTime) { + var bbox = this.innerSize(); + this.updateScale(Math.min( + (width - 2 * padding) / bbox.width, + (Math.abs(height)) / bbox.height + ), transitionTime); + + var lsize = this.size(); + var lx, ly; + switch(vAlign) { + case "top": + ly = y + lsize.height / 2; + break; + case "center": + ly = y + (height) / 2; + break; + case "bottom": + ly = y + height - lsize.height / 2; + } + + switch(hAlign) { + case "left": + lx = x + padding + lsize.width / 2; + break; + case "center": + lx = x + width / 2; + break; + case "right": + lx = x + width - padding - lsize.width / 2; + } + + this.updatePosition(lx, ly, transitionTime); + + return this; + } + + Label.prototype.fillCircle = function(radius, transitionTime) { + this.updatePosition(0, 0, transitionTime); + + var bbox = this.innerSize(); + var ratio = bbox.height / bbox.width; + + var maxHeight = radius * 2 * Math.cos(Math.PI/2 - Math.atan(ratio)) + this.updateScale(maxHeight / bbox.height, transitionTime); + } + + Label.prototype.fillSlice = function(arc, radius, d, transitionTime) { + var c = arc.centroid(d); + this.updatePosition(c[0], c[1], transitionTime); + + var bbox = this.innerSize(); + var ratio = bbox.height / bbox.width; + + // Get maximal scale so that label fits in the slice. + var diag1 = new g.Line(c[1] - ratio * c[0], ratio); + var diag2 = new g.Line(c[1] + ratio * c[0], -ratio); + var limit1 = new g.Line(0, Math.tan(d.startAngle + Math.PI/2)); + var limit2 = new g.Line(0, Math.tan(d.endAngle + Math.PI/2)); + + // Get all intersection points + var intersects = []; + intersects = intersects.concat(g.intersectionLineRadius(diag1, d.startAngle - Math.PI/2, radius)); + intersects = intersects.concat(g.intersectionLineRadius(diag1, d.endAngle - Math.PI/2, radius)); + intersects = intersects.concat(g.intersectionLineAndCircle(diag1, radius)); + intersects = intersects.concat(g.intersectionLineRadius(diag2, d.startAngle - Math.PI/2, radius)); + intersects = intersects.concat(g.intersectionLineRadius(diag2, d.endAngle - Math.PI/2, radius)); + intersects = intersects.concat(g.intersectionLineAndCircle(diag2, radius)); + + // Compute distance between all these points and take the minimum + var center = new g.Point(c[0], c[1]); + var distances = intersects.map(function(x) {return g.distance(center, x)}); + var minDist = d3.min(distances); + var actualDist = Math.sqrt( Math.pow(bbox.height / 2, 2) + Math.pow(bbox.width / 2, 2)); + + this.updateScale(minDist / actualDist, transitionTime); + } +}()); },{"./geometry.js":4,"d3":1}],6:[function(require,module,exports){ -// Copyright © 2016 RTE Réseau de transport d’électricité -(function() { - 'use strict'; - - module.exports.Barchart = require("./barchart.js"); - module.exports.Polarchart = require("./polarchart.js"); - module.exports.Piechart = require("./piechart.js"); - - if (window) window.minicharts = module.exports; -}()); +// Copyright © 2016 RTE Réseau de transport d’électricité +(function() { + 'use strict'; + + module.exports.Barchart = require("./barchart.js"); + module.exports.Polarchart = require("./polarchart.js"); + module.exports.Piechart = require("./piechart.js"); + + if (window) window.minicharts = module.exports; +}()); },{"./barchart.js":2,"./piechart.js":7,"./polarchart.js":8}],7:[function(require,module,exports){ -// Copyright © 2016 RTE Réseau de transport d’électricité -(function() { - 'use strict'; - var Polarchart = require("./polarchart.js"); - module.exports = Piechart; - - Piechart.prototype = Object.create(Polarchart.prototype); - Piechart.prototype.constructor = Piechart; - - /** - * @class Piechart - * @summary Represent data with a pie chart - * @desc A pie chart is a special case of polar chart where the data values - * are represented by the angle of the slices. They should only be used to - * compare qualitatively proportions and compositions. Indeed, human eye is - * not good at comparing angles so only large differences are visible. - * @param {string} el CSS selector representing the element that will hold the chart. - * @param {number[]} data Data the chart has to represent. - * @param {PiechartOptions} options Options controling graphical aspects of the chart. - */ - - /** @typedef {object} PiechartOptions - * @memberOf Piechart - * @prop {number} [width=60] Width of the chart. - * @prop {number} [height=60] Height of the chart. - * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds. - * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of - * colors or a function `(d, i) -> color` where `d` is a data value and `i` - * is the index of the value.If it is an array with length less than the length - * of data, then the colors are recycled. - * @prop {string[]|"none"|"auto"|function}[labels="none"] Labels to display in slices. - * It can be an array with same length as the data. It can also be a function - * `(d, i) -> labelText` where `d` is a data value and `i` - * is the index of the value. Finally it can be equal to "none" to hide labels - * or "auto" to display in a compact way values. - * @prop {string|string[]|"auto"|function}[labelColors="auto"] Color of the labels. - * It can be a single value or an array with same length as the data. It can - * also be a function `(d, i) -> color` where `d` is a data value and `i` - * is the index of the value. Finally it can be equal to "auto". In this case, - * the most readable color is choosen depding on the color of the slice. - * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is - * not enough space for a given label, then it is hidden. - * @prop {number}[labelMaxSize=24] Label maximum size in pixels. - * @prop {string}[labelClass=""] Labels CSS class. - * @prop {string}[shapeClass=""] slices CSS class. - */ - - /** @method setData - * @desc Update the data represented by the chart - * @instance - * @memberOf Piechart - * @param {number[]} data Data the chart has to represent. - */ - - /** @method setOptions - * @desc Update the graphical options of a chart - * @instance - * @memberOf Piechart - * @param {PiechartOptions} options Options controling graphical aspects of the chart. - */ - - /** @method update - * @desc Update simulatenously data and options of a pie chart. - * @instance - * @memberOf Piechart - * @param {number[]} data Data the chart has to represent. - * @param {PiechartOptions} options Options controling graphical aspects of the chart. - */ - function Piechart(el, data, options) { - Polarchart.call(this, el, data, options); - } - - Piechart.prototype._processOptions = function(options) { - options = options || {}; - options.type = "angle"; - return Polarchart.prototype._processOptions.call(this, options); - } - -}()); +// Copyright © 2016 RTE Réseau de transport d’électricité +(function() { + 'use strict'; + var Polarchart = require("./polarchart.js"); + module.exports = Piechart; + + Piechart.prototype = Object.create(Polarchart.prototype); + Piechart.prototype.constructor = Piechart; + + /** + * @class Piechart + * @summary Represent data with a pie chart + * @desc A pie chart is a special case of polar chart where the data values + * are represented by the angle of the slices. They should only be used to + * compare qualitatively proportions and compositions. Indeed, human eye is + * not good at comparing angles so only large differences are visible. + * @param {string} el CSS selector representing the element that will hold the chart. + * @param {number[]} data Data the chart has to represent. + * @param {PiechartOptions} options Options controling graphical aspects of the chart. + */ + + /** @typedef {object} PiechartOptions + * @memberOf Piechart + * @prop {number} [width=60] Width of the chart. + * @prop {number} [height=60] Height of the chart. + * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds. + * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of + * colors or a function `(d, i) -> color` where `d` is a data value and `i` + * is the index of the value.If it is an array with length less than the length + * of data, then the colors are recycled. + * @prop {string[]|"none"|"auto"|function}[labels="none"] Labels to display in slices. + * It can be an array with same length as the data. It can also be a function + * `(d, i) -> labelText` where `d` is a data value and `i` + * is the index of the value. Finally it can be equal to "none" to hide labels + * or "auto" to display in a compact way values. + * @prop {string|string[]|"auto"|function}[labelColors="auto"] Color of the labels. + * It can be a single value or an array with same length as the data. It can + * also be a function `(d, i) -> color` where `d` is a data value and `i` + * is the index of the value. Finally it can be equal to "auto". In this case, + * the most readable color is choosen depding on the color of the slice. + * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is + * not enough space for a given label, then it is hidden. + * @prop {number}[labelMaxSize=24] Label maximum size in pixels. + * @prop {string}[labelClass=""] Labels CSS class. + * @prop {string}[shapeClass=""] slices CSS class. + */ + + /** @method setData + * @desc Update the data represented by the chart + * @instance + * @memberOf Piechart + * @param {number[]} data Data the chart has to represent. + */ + + /** @method setOptions + * @desc Update the graphical options of a chart + * @instance + * @memberOf Piechart + * @param {PiechartOptions} options Options controling graphical aspects of the chart. + */ + + /** @method update + * @desc Update simulatenously data and options of a pie chart. + * @instance + * @memberOf Piechart + * @param {number[]} data Data the chart has to represent. + * @param {PiechartOptions} options Options controling graphical aspects of the chart. + */ + function Piechart(el, data, options) { + Polarchart.call(this, el, data, options); + } + + Piechart.prototype._processOptions = function(options) { + options = options || {}; + options.type = "angle"; + return Polarchart.prototype._processOptions.call(this, options); + } + +}()); },{"./polarchart.js":8}],8:[function(require,module,exports){ -// Copyright © 2016 RTE Réseau de transport d’électricité -(function() { - 'use strict'; - - var d3 = require("d3"); - var Chart = require("./chart.js"); - - module.exports = Polarchart; - - Polarchart.prototype = Object.create(Chart.prototype); - Polarchart.prototype.constructor = Polarchart; - - /** - * @class Polarchart - * @summary Represent data with a polar chart - * @desc Polar charts are nice looking charts especially on a map, - * but individual values are hard to compare - * on these charts: the human eye is good to compare lengths, but not - * to compare agnles, radius or areas. Polar charts should only be used when - * one wants to point out qualitative results and does not need a precise - * representation of data. Another limitation compared to barcharts is that - * polar charts cannot represent negative values. - * @param {string} el CSS selector representing the element that will hold the chart. - * @param {number[]} data Data the chart has to represent. - * @param {PolarchartOptions} options Options controling graphical aspects of the chart. - */ - - /** @typedef {object} PolarchartOptions - * @memberOf Polarchart - * @prop {number|"auto"} [maxValue="auto"] Maximum value data could take.It - * is important to set this option explicitely if one wants to compare - * charts and use the same scale on each one. By default it equals to the - * maximum value of the data. - * @prop {"area"|"radius"|"angle"} [type="area"] What kind of scale to use to - * represent the data? `angle` produces a pie chart and should be used only to visualize - * proportions. In other cases, `area` (the default) should generally be - * prefered. `radius` should only be used when one wants to magnify differences. - * @prop {number} [width=60] Width of the chart. - * @prop {number} [height=60] Height of the chart. - * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds. - * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of - * colors or a function `(d, i) -> color` where `d` is a data value and `i` - * is the index of the value.If it is an array with length less than the length - * of data, then the colors are recycled. - * @prop {string[]|"none"|"auto"|function}[labels="none"] Labels to display in slices. - * It can be an array with same length as the data. It can also be a function - * `(d, i) -> labelText` where `d` is a data value and `i` - * is the index of the value. Finally it can be equal to "none" to hide labels - * or "auto" to display in a compact way values. - * @prop {string|string[]|"auto"|function}[labelColors="auto"] Color of the labels. - * It can be a single value or an array with same length as the data. It can - * also be a function `(d, i) -> color` where `d` is a data value and `i` - * is the index of the value. Finally it can be equal to "auto". In this case, - * the most readable color is choosen depding on the color of the slice. - * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is - * not enough space for a given label, then it is hidden. - * @prop {number}[labelMaxSize=24] Label maximum size in pixels. - * @prop {string}[labelClass=""] Labels CSS class. - * @prop {string}[shapeClass=""] slices CSS class. - */ - - /** @method setData - * @desc Update the data represented by the chart - * @instance - * @memberOf Polarchart - * @param {number[]} data Data the chart has to represent. - */ - - /** @method setOptions - * @desc Update the graphical options of a chart - * @instance - * @memberOf Polarchart - * @param {PolarchartOptions} options Options controling graphical aspects of the chart. - */ - - /** @method update - * @desc Update simulatenously data and options of a polar chart. - * @instance - * @memberOf Polarchart - * @param {number[]} data Data the chart has to represent. - * @param {PolarchartOptions} options Options controling graphical aspects of the chart. - */ - - function Polarchart(el, data, options) { - var defaults = { - type: "area", - maxValue: "auto", - } - - Chart.call(this, el, data, options, defaults); - - // Center the chart group inside the container - this._chart - .attr("transform", "translate(" + this._options.width/2 + "," + this._options.width/2 + ")"); - - this._draw(); - } - - Polarchart.prototype._processOptions = function(options) { - options = Chart.prototype._processOptions.call(this, options, this._options); - - options.height = options.width; - - if (options.maxValue === "auto") { - options.maxValue = d3.max(this._data); - } - //debugger; - var radius = options.width / 2; - var pie = d3.pie().sort(null); - var arc = d3.arc().innerRadius(0); - var radiusFun; - - if (options.type === "angle") { - radiusFun = function(d) {return radius} - pie.value(function(d) {return d}); - } else { - radiusFun = options.type == "radius" ? d3.scaleLinear() : d3.scalePow().exponent(0.5); - radiusFun.range([0, radius]) - .domain([0, options.maxValue]); - pie.value(function(d) {return 1}); - } - - arc.outerRadius(function(d, i) {return radiusFun(d.data)}); - - options.radius = radiusFun; - options.pie = pie; - options. arc = arc; - return options; - } - - Polarchart.prototype._draw = function() { - var self = this; - Chart.prototype._draw.call(this); - - // Move center of the chart - this._chart - .transition() - .duration(self._options.transitionTime) - .attr("transform", "translate(" + self._options.width/2 + "," + self._options.width/2 + ")"); - - var slices = this._chart.selectAll("path").data(this._options.pie(this._data)); - - // Initialize new slices - slices.enter() - .append("path") - .attr("class", "leaflet-clickable") - .attr("d", this._options.arc) - .attr("fill", function(d, i) {return self._options.colorFun(d, i)}) - .each(function(d, i) { - if (self._data.length == 1) this._current = {startAngle:d.startAngle, endAngle:d.endAngle, data:0} - else this._current = {startAngle:d.endAngle, endAngle:d.endAngle} - }) - // Update slices - .merge(slices) - .attr("class", function(d, i) {return self._options.shapeClass(d.data, i)}) - .transition() - .duration(self._options.transitionTime) - .attrTween("d", arcTween) - .attr("fill", function(d, i) {return self._options.colorFun(d, i)}); - // Remove slices - slices.exit().remove(); - - function arcTween(a) { - var i = d3.interpolate(this._current, a); - this._current = i(0); - return function(t) { - return self._options.arc(i(t)); - }; - } - - // Add/update labels - // function(arc, radiusFun, d, transitionTime) - var initLabel, updateLabel; - if (this._data.length > 1) { - var data = this._options.pie(this._data); - initLabel = function(label, d, i) { - label.fillSlice(self._options.arc, self._options.radius(d), data[i], 0); - } - - updateLabel = function(label, d, i) { - label.fillSlice(self._options.arc, self._options.radius(d), data[i], - self._options.transitionTime); - } - } else { - initLabel = function(label, d, i) { - label.fillCircle(self._options.radius(d), 0); - } - - updateLabel = function(label, d, i) { - label.fillCircle(self._options.radius(d), self._options.transitionTime); - } - } - - this._drawLabels(initLabel, updateLabel); - } - -}()); +// Copyright © 2016 RTE Réseau de transport d’électricité +(function() { + 'use strict'; + + var d3 = require("d3"); + var Chart = require("./chart.js"); + + module.exports = Polarchart; + + Polarchart.prototype = Object.create(Chart.prototype); + Polarchart.prototype.constructor = Polarchart; + + /** + * @class Polarchart + * @summary Represent data with a polar chart + * @desc Polar charts are nice looking charts especially on a map, + * but individual values are hard to compare + * on these charts: the human eye is good to compare lengths, but not + * to compare agnles, radius or areas. Polar charts should only be used when + * one wants to point out qualitative results and does not need a precise + * representation of data. Another limitation compared to barcharts is that + * polar charts cannot represent negative values. + * @param {string} el CSS selector representing the element that will hold the chart. + * @param {number[]} data Data the chart has to represent. + * @param {PolarchartOptions} options Options controling graphical aspects of the chart. + */ + + /** @typedef {object} PolarchartOptions + * @memberOf Polarchart + * @prop {number|"auto"} [maxValue="auto"] Maximum value data could take.It + * is important to set this option explicitely if one wants to compare + * charts and use the same scale on each one. By default it equals to the + * maximum value of the data. + * @prop {"area"|"radius"|"angle"} [type="area"] What kind of scale to use to + * represent the data? `angle` produces a pie chart and should be used only to visualize + * proportions. In other cases, `area` (the default) should generally be + * prefered. `radius` should only be used when one wants to magnify differences. + * @prop {number} [width=60] Width of the chart. + * @prop {number} [height=60] Height of the chart. + * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds. + * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of + * colors or a function `(d, i) -> color` where `d` is a data value and `i` + * is the index of the value.If it is an array with length less than the length + * of data, then the colors are recycled. + * @prop {string[]|"none"|"auto"|function}[labels="none"] Labels to display in slices. + * It can be an array with same length as the data. It can also be a function + * `(d, i) -> labelText` where `d` is a data value and `i` + * is the index of the value. Finally it can be equal to "none" to hide labels + * or "auto" to display in a compact way values. + * @prop {string|string[]|"auto"|function}[labelColors="auto"] Color of the labels. + * It can be a single value or an array with same length as the data. It can + * also be a function `(d, i) -> color` where `d` is a data value and `i` + * is the index of the value. Finally it can be equal to "auto". In this case, + * the most readable color is choosen depding on the color of the slice. + * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is + * not enough space for a given label, then it is hidden. + * @prop {number}[labelMaxSize=24] Label maximum size in pixels. + * @prop {string}[labelClass=""] Labels CSS class. + * @prop {string}[shapeClass=""] slices CSS class. + */ + + /** @method setData + * @desc Update the data represented by the chart + * @instance + * @memberOf Polarchart + * @param {number[]} data Data the chart has to represent. + */ + + /** @method setOptions + * @desc Update the graphical options of a chart + * @instance + * @memberOf Polarchart + * @param {PolarchartOptions} options Options controling graphical aspects of the chart. + */ + + /** @method update + * @desc Update simulatenously data and options of a polar chart. + * @instance + * @memberOf Polarchart + * @param {number[]} data Data the chart has to represent. + * @param {PolarchartOptions} options Options controling graphical aspects of the chart. + */ + + function Polarchart(el, data, options) { + var defaults = { + type: "area", + maxValue: "auto", + } + + Chart.call(this, el, data, options, defaults); + + // Center the chart group inside the container + this._chart + .attr("transform", "translate(" + this._options.width/2 + "," + this._options.width/2 + ")"); + + this._draw(); + } + + Polarchart.prototype._processOptions = function(options) { + options = Chart.prototype._processOptions.call(this, options, this._options); + + options.height = options.width; + + if (options.maxValue === "auto") { + options.maxValue = d3.max(this._data); + } + //debugger; + var radius = options.width / 2; + var pie = d3.pie().sort(null); + var arc = d3.arc().innerRadius(0); + var radiusFun; + + if (options.type === "angle") { + radiusFun = function(d) {return radius} + pie.value(function(d) {return d}); + } else { + radiusFun = options.type == "radius" ? d3.scaleLinear() : d3.scalePow().exponent(0.5); + radiusFun.range([0, radius]) + .domain([0, options.maxValue]); + pie.value(function(d) {return 1}); + } + + arc.outerRadius(function(d, i) {return radiusFun(d.data)}); + + options.radius = radiusFun; + options.pie = pie; + options. arc = arc; + return options; + } + + Polarchart.prototype._draw = function() { + var self = this; + Chart.prototype._draw.call(this); + + // Move center of the chart + this._chart + .transition() + .duration(self._options.transitionTime) + .attr("transform", "translate(" + self._options.width/2 + "," + self._options.width/2 + ")"); + + var slices = this._chart.selectAll("path").data(this._options.pie(this._data)); + + // Initialize new slices + slices.enter() + .append("path") + .attr("class", "leaflet-clickable") + .attr("d", this._options.arc) + .attr("fill", function(d, i) {return self._options.colorFun(d, i)}) + .each(function(d, i) { + if (self._data.length == 1) this._current = {startAngle:d.startAngle, endAngle:d.endAngle, data:0} + else this._current = {startAngle:d.endAngle, endAngle:d.endAngle} + }) + // Update slices + .merge(slices) + .attr("class", function(d, i) {return self._options.shapeClass(d.data, i)}) + .transition() + .duration(self._options.transitionTime) + .attrTween("d", arcTween) + .attr("fill", function(d, i) {return self._options.colorFun(d, i)}); + // Remove slices + slices.exit().remove(); + + function arcTween(a) { + var i = d3.interpolate(this._current, a); + this._current = i(0); + return function(t) { + return self._options.arc(i(t)); + }; + } + + // Add/update labels + // function(arc, radiusFun, d, transitionTime) + var initLabel, updateLabel; + if (this._data.length > 1) { + var data = this._options.pie(this._data); + initLabel = function(label, d, i) { + label.fillSlice(self._options.arc, self._options.radius(d), data[i], 0); + } + + updateLabel = function(label, d, i) { + label.fillSlice(self._options.arc, self._options.radius(d), data[i], + self._options.transitionTime); + } + } else { + initLabel = function(label, d, i) { + label.fillCircle(self._options.radius(d), 0); + } + + updateLabel = function(label, d, i) { + label.fillCircle(self._options.radius(d), self._options.transitionTime); + } + } + + this._drawLabels(initLabel, updateLabel); + } + +}()); },{"./chart.js":3,"d3":1}],9:[function(require,module,exports){ -// Copyright © 2016 RTE Réseau de transport d’électricité -(function() { - 'use strict'; - - module.exports.mergeOptions = mergeOptions; - module.exports.toArray = toArray; - module.exports.toFunction = toFunction; - module.exports.prettyNumber = prettyNumber; - - /** Merge the properties of two objects. More precisely, if a property is - * present in "defaults" but not in "options" it is copied in options. this - * function is used to specified default options for a function. - * - * @param {object} options Option object - * @param {object} defaults Object containing default values of options - * - * @return {object} Merged object. - */ - function mergeOptions(options, defaults) { - if (options) options = JSON.parse(JSON.stringify(options)); - else options = {}; - defaults = defaults || {}; - for (var opt in defaults) { - if (defaults.hasOwnProperty(opt) && !options.hasOwnProperty(opt)) { - options[opt] = defaults[opt]; - } - } - return options; - } - - /** Converts parameter to Array. Used when user wants to pass a single value, - * but a function expects an array. - * @param {any} x An array or a scalar value - * @return {any[]} - * 'x' if it is an array, else an array with 'x' as its unique - * element. - */ - function toArray(x) { - if (x.constructor !== Array) x = [x]; - return x; - } - - /** Converts its argument in a function. - * @param {any} x A function, an array, or a scalar. - * @return {function} - * - 'x' if it is a function. - * - If 'x' is a scalar, it returns a function that always returns 'x' - * - If 'x' is an array it returns the function (d, i) -> x[i] - */ - function toFunction(x) { - if (typeof x === "function") return (x); - x = toArray(x); - return function(d, i) {return x[i % x.length]}; - } - - /** Transforms a number in a pretty and small string - * @param {number} number - * @return {string} - * A string representing the number. It only keeps at most 2 decimal - * digits and it adds suffixes "K", "M", "B", "T" for large values. - */ - function prettyNumber(number) { - if (isNaN(number) || !isFinite(number)) return ""; - - var absVal = Math.abs(number); - var sign= number < 0? "-": ""; - var scale; - - if( absVal < 1000 ) { - scale = ''; - } else if( absVal < 1000000 ) { - scale = 'K'; - absVal = absVal/1000; - - } else if( absVal < 1000000000 ) { - scale = 'M'; - absVal = absVal/1000000; - - } else if( absVal < 1000000000000 ) { - scale = 'B'; - absVal = absVal/1000000000; - - } else if( absVal < 1000000000000000 ) { - scale = 'T'; - absVal = absVal/1000000000000; - } - - if (absVal > 10) absVal = roundTo(absVal); - else if (absVal > 1) absVal = roundTo(absVal, 10, true); - else absVal = roundTo(absVal, 100, true); - - return sign + absVal + scale; - } - - /** Round a number - * @param {number} number - * @param {number} to: desired precision - * @param {boolean} inverse If true, number is rounded at the 1 / 'to' - */ - function roundTo(number, to, inverse) { - to = to || 1; - if (inverse) return Math.round(number * to) / to; - else return Math.round(number / to) * to; - } -}()); +// Copyright © 2016 RTE Réseau de transport d’électricité +(function() { + 'use strict'; + + module.exports.mergeOptions = mergeOptions; + module.exports.toArray = toArray; + module.exports.toFunction = toFunction; + module.exports.prettyNumber = prettyNumber; + + /** Merge the properties of two objects. More precisely, if a property is + * present in "defaults" but not in "options" it is copied in options. this + * function is used to specified default options for a function. + * + * @param {object} options Option object + * @param {object} defaults Object containing default values of options + * + * @return {object} Merged object. + */ + function mergeOptions(options, defaults) { + if (options) options = JSON.parse(JSON.stringify(options)); + else options = {}; + defaults = defaults || {}; + for (var opt in defaults) { + if (defaults.hasOwnProperty(opt) && !options.hasOwnProperty(opt)) { + options[opt] = defaults[opt]; + } + } + return options; + } + + /** Converts parameter to Array. Used when user wants to pass a single value, + * but a function expects an array. + * @param {any} x An array or a scalar value + * @return {any[]} + * 'x' if it is an array, else an array with 'x' as its unique + * element. + */ + function toArray(x) { + if (x.constructor !== Array) x = [x]; + return x; + } + + /** Converts its argument in a function. + * @param {any} x A function, an array, or a scalar. + * @return {function} + * - 'x' if it is a function. + * - If 'x' is a scalar, it returns a function that always returns 'x' + * - If 'x' is an array it returns the function (d, i) -> x[i] + */ + function toFunction(x) { + if (typeof x === "function") return (x); + x = toArray(x); + return function(d, i) {return x[i % x.length]}; + } + + /** Transforms a number in a pretty and small string + * @param {number} number + * @return {string} + * A string representing the number. It only keeps at most 2 decimal + * digits and it adds suffixes "K", "M", "B", "T" for large values. + */ + function prettyNumber(number) { + if (isNaN(number) || !isFinite(number)) return ""; + + var absVal = Math.abs(number); + var sign= number < 0? "-": ""; + var scale; + + if( absVal < 1000 ) { + scale = ''; + } else if( absVal < 1000000 ) { + scale = 'K'; + absVal = absVal/1000; + + } else if( absVal < 1000000000 ) { + scale = 'M'; + absVal = absVal/1000000; + + } else if( absVal < 1000000000000 ) { + scale = 'B'; + absVal = absVal/1000000000; + + } else if( absVal < 1000000000000000 ) { + scale = 'T'; + absVal = absVal/1000000000000; + } + + if (absVal > 10) absVal = roundTo(absVal); + else if (absVal > 1) absVal = roundTo(absVal, 10, true); + else absVal = roundTo(absVal, 100, true); + + return sign + absVal + scale; + } + + /** Round a number + * @param {number} number + * @param {number} to: desired precision + * @param {boolean} inverse If true, number is rounded at the 1 / 'to' + */ + function roundTo(number, to, inverse) { + to = to || 1; + if (inverse) return Math.round(number * to) / to; + else return Math.round(number / to) * to; + } +}()); },{}],10:[function(require,module,exports){ // TinyColor v1.4.1 @@ -18686,13 +18854,16 @@ else { onAdd: function(map) { L.CircleMarker.prototype.onAdd.call(this, map); // Change class of container so that the element hides when zooming - var container = this._container || this._renderer._container; + var container = this._container || this._renderer._rootGroup; container.setAttribute("class", "leaflet-zoom-hide"); // create the svg element that holds the chart this._chart = d3.select(container).append("g"); + if (L.version >= "1.0") this.addInteractiveTarget(this._chart.node()); + map.on('moveend', this._onMoveend, this); + this._redraw(true); }, @@ -18809,8 +18980,8 @@ else { labelMinSize: this.options.labelMinSize, labelMaxSize: this.options.labelMaxSize, labelPadding: this.options.labelPadding, - labelClass: "leaflet-clickable", - shapeClass: "leaflet-clickable" + labelClass: "leaflet-clickable leaflet-interactive", + shapeClass: "leaflet-clickable leaflet-interactive" }; // Create of update chart @@ -18903,4 +19074,4 @@ else { }()); },{}]},{},[11]) -//# 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e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})","// https://d3js.org Version 4.4.0. Copyright 2016 Mike Bostock.\n(function (global, factory) {\n  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n  typeof define === 'function' && define.amd ? define(['exports'], factory) :\n  (factory((global.d3 = global.d3 || {})));\n}(this, (function (exports) { 'use strict';\n\nvar version = \"4.4.0\";\n\nvar ascending = function(a, b) {\n  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;\n};\n\nvar bisector = function(compare) {\n  if (compare.length === 1) compare = ascendingComparator(compare);\n  return {\n    left: function(a, x, lo, hi) {\n      if (lo == null) lo = 0;\n      if (hi == null) hi = a.length;\n      while (lo < hi) {\n        var mid = lo + hi >>> 1;\n        if (compare(a[mid], x) < 0) lo = mid + 1;\n        else hi = mid;\n      }\n      return lo;\n    },\n    right: function(a, x, lo, hi) {\n      if (lo == null) lo = 0;\n      if (hi == null) hi = a.length;\n      while (lo < hi) {\n        var mid = lo + hi >>> 1;\n        if (compare(a[mid], x) > 0) hi = mid;\n        else lo = mid + 1;\n      }\n      return lo;\n    }\n  };\n};\n\nfunction ascendingComparator(f) {\n  return function(d, x) {\n    return ascending(f(d), x);\n  };\n}\n\nvar ascendingBisect = bisector(ascending);\nvar bisectRight = ascendingBisect.right;\nvar bisectLeft = ascendingBisect.left;\n\nvar descending = function(a, b) {\n  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;\n};\n\nvar number = function(x) {\n  return x === null ? NaN : +x;\n};\n\nvar variance = function(array, f) {\n  var n = array.length,\n      m = 0,\n      a,\n      d,\n      s = 0,\n      i = -1,\n      j = 0;\n\n  if (f == null) {\n    while (++i < n) {\n      if (!isNaN(a = number(array[i]))) {\n        d = a - m;\n        m += d / ++j;\n        s += d * (a - m);\n      }\n    }\n  }\n\n  else {\n    while (++i < n) {\n      if (!isNaN(a = number(f(array[i], i, array)))) {\n        d = a - m;\n        m += d / ++j;\n        s += d * (a - m);\n      }\n    }\n  }\n\n  if (j > 1) return s / (j - 1);\n};\n\nvar deviation = function(array, f) {\n  var v = variance(array, f);\n  return v ? Math.sqrt(v) : v;\n};\n\nvar extent = function(array, f) {\n  var i = -1,\n      n = array.length,\n      a,\n      b,\n      c;\n\n  if (f == null) {\n    while (++i < n) if ((b = array[i]) != null && b >= b) { a = c = b; break; }\n    while (++i < n) if ((b = array[i]) != null) {\n      if (a > b) a = b;\n      if (c < b) c = b;\n    }\n  }\n\n  else {\n    while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) { a = c = b; break; }\n    while (++i < n) if ((b = f(array[i], i, array)) != null) {\n      if (a > b) a = b;\n      if (c < b) c = b;\n    }\n  }\n\n  return [a, c];\n};\n\nvar array = Array.prototype;\n\nvar slice = array.slice;\nvar map = array.map;\n\nvar constant$1 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar identity = function(x) {\n  return x;\n};\n\nvar range = function(start, stop, step) {\n  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;\n\n  var i = -1,\n      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,\n      range = new Array(n);\n\n  while (++i < n) {\n    range[i] = start + i * step;\n  }\n\n  return range;\n};\n\nvar e10 = Math.sqrt(50);\nvar e5 = Math.sqrt(10);\nvar e2 = Math.sqrt(2);\n\nvar ticks = function(start, stop, count) {\n  var step = tickStep(start, stop, count);\n  return range(\n    Math.ceil(start / step) * step,\n    Math.floor(stop / step) * step + step / 2, // inclusive\n    step\n  );\n};\n\nfunction tickStep(start, stop, count) {\n  var step0 = Math.abs(stop - start) / Math.max(0, count),\n      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),\n      error = step0 / step1;\n  if (error >= e10) step1 *= 10;\n  else if (error >= e5) step1 *= 5;\n  else if (error >= e2) step1 *= 2;\n  return stop < start ? -step1 : step1;\n}\n\nvar sturges = function(values) {\n  return Math.ceil(Math.log(values.length) / Math.LN2) + 1;\n};\n\nvar histogram = function() {\n  var value = identity,\n      domain = extent,\n      threshold = sturges;\n\n  function histogram(data) {\n    var i,\n        n = data.length,\n        x,\n        values = new Array(n);\n\n    for (i = 0; i < n; ++i) {\n      values[i] = value(data[i], i, data);\n    }\n\n    var xz = domain(values),\n        x0 = xz[0],\n        x1 = xz[1],\n        tz = threshold(values, x0, x1);\n\n    // Convert number of thresholds into uniform thresholds.\n    if (!Array.isArray(tz)) tz = ticks(x0, x1, tz);\n\n    // Remove any thresholds outside the domain.\n    var m = tz.length;\n    while (tz[0] <= x0) tz.shift(), --m;\n    while (tz[m - 1] >= x1) tz.pop(), --m;\n\n    var bins = new Array(m + 1),\n        bin;\n\n    // Initialize bins.\n    for (i = 0; i <= m; ++i) {\n      bin = bins[i] = [];\n      bin.x0 = i > 0 ? tz[i - 1] : x0;\n      bin.x1 = i < m ? tz[i] : x1;\n    }\n\n    // Assign data to bins by value, ignoring any outside the domain.\n    for (i = 0; i < n; ++i) {\n      x = values[i];\n      if (x0 <= x && x <= x1) {\n        bins[bisectRight(tz, x, 0, m)].push(data[i]);\n      }\n    }\n\n    return bins;\n  }\n\n  histogram.value = function(_) {\n    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant$1(_), histogram) : value;\n  };\n\n  histogram.domain = function(_) {\n    return arguments.length ? (domain = typeof _ === \"function\" ? _ : constant$1([_[0], _[1]]), histogram) : domain;\n  };\n\n  histogram.thresholds = function(_) {\n    return arguments.length ? (threshold = typeof _ === \"function\" ? _ : Array.isArray(_) ? constant$1(slice.call(_)) : constant$1(_), histogram) : threshold;\n  };\n\n  return histogram;\n};\n\nvar threshold = function(array, p, f) {\n  if (f == null) f = number;\n  if (!(n = array.length)) return;\n  if ((p = +p) <= 0 || n < 2) return +f(array[0], 0, array);\n  if (p >= 1) return +f(array[n - 1], n - 1, array);\n  var n,\n      h = (n - 1) * p,\n      i = Math.floor(h),\n      a = +f(array[i], i, array),\n      b = +f(array[i + 1], i + 1, array);\n  return a + (b - a) * (h - i);\n};\n\nvar freedmanDiaconis = function(values, min, max) {\n  values = map.call(values, number).sort(ascending);\n  return Math.ceil((max - min) / (2 * (threshold(values, 0.75) - threshold(values, 0.25)) * Math.pow(values.length, -1 / 3)));\n};\n\nvar scott = function(values, min, max) {\n  return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(values.length, -1 / 3)));\n};\n\nvar max = function(array, f) {\n  var i = -1,\n      n = array.length,\n      a,\n      b;\n\n  if (f == null) {\n    while (++i < n) if ((b = array[i]) != null && b >= b) { a = b; break; }\n    while (++i < n) if ((b = array[i]) != null && b > a) a = b;\n  }\n\n  else {\n    while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) { a = b; break; }\n    while (++i < n) if ((b = f(array[i], i, array)) != null && b > a) a = b;\n  }\n\n  return a;\n};\n\nvar mean = function(array, f) {\n  var s = 0,\n      n = array.length,\n      a,\n      i = -1,\n      j = n;\n\n  if (f == null) {\n    while (++i < n) if (!isNaN(a = number(array[i]))) s += a; else --j;\n  }\n\n  else {\n    while (++i < n) if (!isNaN(a = number(f(array[i], i, array)))) s += a; else --j;\n  }\n\n  if (j) return s / j;\n};\n\nvar median = function(array, f) {\n  var numbers = [],\n      n = array.length,\n      a,\n      i = -1;\n\n  if (f == null) {\n    while (++i < n) if (!isNaN(a = number(array[i]))) numbers.push(a);\n  }\n\n  else {\n    while (++i < n) if (!isNaN(a = number(f(array[i], i, array)))) numbers.push(a);\n  }\n\n  return threshold(numbers.sort(ascending), 0.5);\n};\n\nvar merge = function(arrays) {\n  var n = arrays.length,\n      m,\n      i = -1,\n      j = 0,\n      merged,\n      array;\n\n  while (++i < n) j += arrays[i].length;\n  merged = new Array(j);\n\n  while (--n >= 0) {\n    array = arrays[n];\n    m = array.length;\n    while (--m >= 0) {\n      merged[--j] = array[m];\n    }\n  }\n\n  return merged;\n};\n\nvar min = function(array, f) {\n  var i = -1,\n      n = array.length,\n      a,\n      b;\n\n  if (f == null) {\n    while (++i < n) if ((b = array[i]) != null && b >= b) { a = b; break; }\n    while (++i < n) if ((b = array[i]) != null && a > b) a = b;\n  }\n\n  else {\n    while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) { a = b; break; }\n    while (++i < n) if ((b = f(array[i], i, array)) != null && a > b) a = b;\n  }\n\n  return a;\n};\n\nvar pairs = function(array) {\n  var i = 0, n = array.length - 1, p = array[0], pairs = new Array(n < 0 ? 0 : n);\n  while (i < n) pairs[i] = [p, p = array[++i]];\n  return pairs;\n};\n\nvar permute = function(array, indexes) {\n  var i = indexes.length, permutes = new Array(i);\n  while (i--) permutes[i] = array[indexes[i]];\n  return permutes;\n};\n\nvar scan = function(array, compare) {\n  if (!(n = array.length)) return;\n  var i = 0,\n      n,\n      j = 0,\n      xi,\n      xj = array[j];\n\n  if (!compare) compare = ascending;\n\n  while (++i < n) if (compare(xi = array[i], xj) < 0 || compare(xj, xj) !== 0) xj = xi, j = i;\n\n  if (compare(xj, xj) === 0) return j;\n};\n\nvar shuffle = function(array, i0, i1) {\n  var m = (i1 == null ? array.length : i1) - (i0 = i0 == null ? 0 : +i0),\n      t,\n      i;\n\n  while (m) {\n    i = Math.random() * m-- | 0;\n    t = array[m + i0];\n    array[m + i0] = array[i + i0];\n    array[i + i0] = t;\n  }\n\n  return array;\n};\n\nvar sum = function(array, f) {\n  var s = 0,\n      n = array.length,\n      a,\n      i = -1;\n\n  if (f == null) {\n    while (++i < n) if (a = +array[i]) s += a; // Note: zero and null are equivalent.\n  }\n\n  else {\n    while (++i < n) if (a = +f(array[i], i, array)) s += a;\n  }\n\n  return s;\n};\n\nvar transpose = function(matrix) {\n  if (!(n = matrix.length)) return [];\n  for (var i = -1, m = min(matrix, length), transpose = new Array(m); ++i < m;) {\n    for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {\n      row[j] = matrix[j][i];\n    }\n  }\n  return transpose;\n};\n\nfunction length(d) {\n  return d.length;\n}\n\nvar zip = function() {\n  return transpose(arguments);\n};\n\nvar prefix = \"$\";\n\nfunction Map() {}\n\nMap.prototype = map$1.prototype = {\n  constructor: Map,\n  has: function(key) {\n    return (prefix + key) in this;\n  },\n  get: function(key) {\n    return this[prefix + key];\n  },\n  set: function(key, value) {\n    this[prefix + key] = value;\n    return this;\n  },\n  remove: function(key) {\n    var property = prefix + key;\n    return property in this && delete this[property];\n  },\n  clear: function() {\n    for (var property in this) if (property[0] === prefix) delete this[property];\n  },\n  keys: function() {\n    var keys = [];\n    for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));\n    return keys;\n  },\n  values: function() {\n    var values = [];\n    for (var property in this) if (property[0] === prefix) values.push(this[property]);\n    return values;\n  },\n  entries: function() {\n    var entries = [];\n    for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]});\n    return entries;\n  },\n  size: function() {\n    var size = 0;\n    for (var property in this) if (property[0] === prefix) ++size;\n    return size;\n  },\n  empty: function() {\n    for (var property in this) if (property[0] === prefix) return false;\n    return true;\n  },\n  each: function(f) {\n    for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);\n  }\n};\n\nfunction map$1(object, f) {\n  var map = new Map;\n\n  // Copy constructor.\n  if (object instanceof Map) object.each(function(value, key) { map.set(key, value); });\n\n  // Index array by numeric index or specified key function.\n  else if (Array.isArray(object)) {\n    var i = -1,\n        n = object.length,\n        o;\n\n    if (f == null) while (++i < n) map.set(i, object[i]);\n    else while (++i < n) map.set(f(o = object[i], i, object), o);\n  }\n\n  // Convert object to map.\n  else if (object) for (var key in object) map.set(key, object[key]);\n\n  return map;\n}\n\nvar nest = function() {\n  var keys = [],\n      sortKeys = [],\n      sortValues,\n      rollup,\n      nest;\n\n  function apply(array, depth, createResult, setResult) {\n    if (depth >= keys.length) return rollup != null\n        ? rollup(array) : (sortValues != null\n        ? array.sort(sortValues)\n        : array);\n\n    var i = -1,\n        n = array.length,\n        key = keys[depth++],\n        keyValue,\n        value,\n        valuesByKey = map$1(),\n        values,\n        result = createResult();\n\n    while (++i < n) {\n      if (values = valuesByKey.get(keyValue = key(value = array[i]) + \"\")) {\n        values.push(value);\n      } else {\n        valuesByKey.set(keyValue, [value]);\n      }\n    }\n\n    valuesByKey.each(function(values, key) {\n      setResult(result, key, apply(values, depth, createResult, setResult));\n    });\n\n    return result;\n  }\n\n  function entries(map, depth) {\n    if (++depth > keys.length) return map;\n    var array, sortKey = sortKeys[depth - 1];\n    if (rollup != null && depth >= keys.length) array = map.entries();\n    else array = [], map.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); });\n    return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array;\n  }\n\n  return nest = {\n    object: function(array) { return apply(array, 0, createObject, setObject); },\n    map: function(array) { return apply(array, 0, createMap, setMap); },\n    entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); },\n    key: function(d) { keys.push(d); return nest; },\n    sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; },\n    sortValues: function(order) { sortValues = order; return nest; },\n    rollup: function(f) { rollup = f; return nest; }\n  };\n};\n\nfunction createObject() {\n  return {};\n}\n\nfunction setObject(object, key, value) {\n  object[key] = value;\n}\n\nfunction createMap() {\n  return map$1();\n}\n\nfunction setMap(map, key, value) {\n  map.set(key, value);\n}\n\nfunction Set() {}\n\nvar proto = map$1.prototype;\n\nSet.prototype = set.prototype = {\n  constructor: Set,\n  has: proto.has,\n  add: function(value) {\n    value += \"\";\n    this[prefix + value] = value;\n    return this;\n  },\n  remove: proto.remove,\n  clear: proto.clear,\n  values: proto.keys,\n  size: proto.size,\n  empty: proto.empty,\n  each: proto.each\n};\n\nfunction set(object, f) {\n  var set = new Set;\n\n  // Copy constructor.\n  if (object instanceof Set) object.each(function(value) { set.add(value); });\n\n  // Otherwise, assume it’s an array.\n  else if (object) {\n    var i = -1, n = object.length;\n    if (f == null) while (++i < n) set.add(object[i]);\n    else while (++i < n) set.add(f(object[i], i, object));\n  }\n\n  return set;\n}\n\nvar keys = function(map) {\n  var keys = [];\n  for (var key in map) keys.push(key);\n  return keys;\n};\n\nvar values = function(map) {\n  var values = [];\n  for (var key in map) values.push(map[key]);\n  return values;\n};\n\nvar entries = function(map) {\n  var entries = [];\n  for (var key in map) entries.push({key: key, value: map[key]});\n  return entries;\n};\n\nvar uniform = function(min, max) {\n  min = min == null ? 0 : +min;\n  max = max == null ? 1 : +max;\n  if (arguments.length === 1) max = min, min = 0;\n  else max -= min;\n  return function() {\n    return Math.random() * max + min;\n  };\n};\n\nvar normal = function(mu, sigma) {\n  var x, r;\n  mu = mu == null ? 0 : +mu;\n  sigma = sigma == null ? 1 : +sigma;\n  return function() {\n    var y;\n\n    // If available, use the second previously-generated uniform random.\n    if (x != null) y = x, x = null;\n\n    // Otherwise, generate a new x and y.\n    else do {\n      x = Math.random() * 2 - 1;\n      y = Math.random() * 2 - 1;\n      r = x * x + y * y;\n    } while (!r || r > 1);\n\n    return mu + sigma * y * Math.sqrt(-2 * Math.log(r) / r);\n  };\n};\n\nvar logNormal = function() {\n  var randomNormal = normal.apply(this, arguments);\n  return function() {\n    return Math.exp(randomNormal());\n  };\n};\n\nvar irwinHall = function(n) {\n  return function() {\n    for (var sum = 0, i = 0; i < n; ++i) sum += Math.random();\n    return sum;\n  };\n};\n\nvar bates = function(n) {\n  var randomIrwinHall = irwinHall(n);\n  return function() {\n    return randomIrwinHall() / n;\n  };\n};\n\nvar exponential = function(lambda) {\n  return function() {\n    return -Math.log(1 - Math.random()) / lambda;\n  };\n};\n\nfunction linear(t) {\n  return +t;\n}\n\nfunction quadIn(t) {\n  return t * t;\n}\n\nfunction quadOut(t) {\n  return t * (2 - t);\n}\n\nfunction quadInOut(t) {\n  return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;\n}\n\nfunction cubicIn(t) {\n  return t * t * t;\n}\n\nfunction cubicOut(t) {\n  return --t * t * t + 1;\n}\n\nfunction cubicInOut(t) {\n  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;\n}\n\nvar exponent = 3;\n\nvar polyIn = (function custom(e) {\n  e = +e;\n\n  function polyIn(t) {\n    return Math.pow(t, e);\n  }\n\n  polyIn.exponent = custom;\n\n  return polyIn;\n})(exponent);\n\nvar polyOut = (function custom(e) {\n  e = +e;\n\n  function polyOut(t) {\n    return 1 - Math.pow(1 - t, e);\n  }\n\n  polyOut.exponent = custom;\n\n  return polyOut;\n})(exponent);\n\nvar polyInOut = (function custom(e) {\n  e = +e;\n\n  function polyInOut(t) {\n    return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;\n  }\n\n  polyInOut.exponent = custom;\n\n  return polyInOut;\n})(exponent);\n\nvar pi = Math.PI;\nvar halfPi = pi / 2;\n\nfunction sinIn(t) {\n  return 1 - Math.cos(t * halfPi);\n}\n\nfunction sinOut(t) {\n  return Math.sin(t * halfPi);\n}\n\nfunction sinInOut(t) {\n  return (1 - Math.cos(pi * t)) / 2;\n}\n\nfunction expIn(t) {\n  return Math.pow(2, 10 * t - 10);\n}\n\nfunction expOut(t) {\n  return 1 - Math.pow(2, -10 * t);\n}\n\nfunction expInOut(t) {\n  return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;\n}\n\nfunction circleIn(t) {\n  return 1 - Math.sqrt(1 - t * t);\n}\n\nfunction circleOut(t) {\n  return Math.sqrt(1 - --t * t);\n}\n\nfunction circleInOut(t) {\n  return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;\n}\n\nvar b1 = 4 / 11;\nvar b2 = 6 / 11;\nvar b3 = 8 / 11;\nvar b4 = 3 / 4;\nvar b5 = 9 / 11;\nvar b6 = 10 / 11;\nvar b7 = 15 / 16;\nvar b8 = 21 / 22;\nvar b9 = 63 / 64;\nvar b0 = 1 / b1 / b1;\n\nfunction bounceIn(t) {\n  return 1 - bounceOut(1 - t);\n}\n\nfunction bounceOut(t) {\n  return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;\n}\n\nfunction bounceInOut(t) {\n  return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;\n}\n\nvar overshoot = 1.70158;\n\nvar backIn = (function custom(s) {\n  s = +s;\n\n  function backIn(t) {\n    return t * t * ((s + 1) * t - s);\n  }\n\n  backIn.overshoot = custom;\n\n  return backIn;\n})(overshoot);\n\nvar backOut = (function custom(s) {\n  s = +s;\n\n  function backOut(t) {\n    return --t * t * ((s + 1) * t + s) + 1;\n  }\n\n  backOut.overshoot = custom;\n\n  return backOut;\n})(overshoot);\n\nvar backInOut = (function custom(s) {\n  s = +s;\n\n  function backInOut(t) {\n    return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;\n  }\n\n  backInOut.overshoot = custom;\n\n  return backInOut;\n})(overshoot);\n\nvar tau = 2 * Math.PI;\nvar amplitude = 1;\nvar period = 0.3;\n\nvar elasticIn = (function custom(a, p) {\n  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n\n  function elasticIn(t) {\n    return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);\n  }\n\n  elasticIn.amplitude = function(a) { return custom(a, p * tau); };\n  elasticIn.period = function(p) { return custom(a, p); };\n\n  return elasticIn;\n})(amplitude, period);\n\nvar elasticOut = (function custom(a, p) {\n  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n\n  function elasticOut(t) {\n    return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);\n  }\n\n  elasticOut.amplitude = function(a) { return custom(a, p * tau); };\n  elasticOut.period = function(p) { return custom(a, p); };\n\n  return elasticOut;\n})(amplitude, period);\n\nvar elasticInOut = (function custom(a, p) {\n  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n\n  function elasticInOut(t) {\n    return ((t = t * 2 - 1) < 0\n        ? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p)\n        : 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;\n  }\n\n  elasticInOut.amplitude = function(a) { return custom(a, p * tau); };\n  elasticInOut.period = function(p) { return custom(a, p); };\n\n  return elasticInOut;\n})(amplitude, period);\n\nvar area = function(polygon) {\n  var i = -1,\n      n = polygon.length,\n      a,\n      b = polygon[n - 1],\n      area = 0;\n\n  while (++i < n) {\n    a = b;\n    b = polygon[i];\n    area += a[1] * b[0] - a[0] * b[1];\n  }\n\n  return area / 2;\n};\n\nvar centroid = function(polygon) {\n  var i = -1,\n      n = polygon.length,\n      x = 0,\n      y = 0,\n      a,\n      b = polygon[n - 1],\n      c,\n      k = 0;\n\n  while (++i < n) {\n    a = b;\n    b = polygon[i];\n    k += c = a[0] * b[1] - b[0] * a[1];\n    x += (a[0] + b[0]) * c;\n    y += (a[1] + b[1]) * c;\n  }\n\n  return k *= 3, [x / k, y / k];\n};\n\n// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of\n// the 3D cross product in a quadrant I Cartesian coordinate system (+x is\n// right, +y is up). Returns a positive value if ABC is counter-clockwise,\n// negative if clockwise, and zero if the points are collinear.\nvar cross = function(a, b, c) {\n  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);\n};\n\nfunction lexicographicOrder(a, b) {\n  return a[0] - b[0] || a[1] - b[1];\n}\n\n// Computes the upper convex hull per the monotone chain algorithm.\n// Assumes points.length >= 3, is sorted by x, unique in y.\n// Returns an array of indices into points in left-to-right order.\nfunction computeUpperHullIndexes(points) {\n  var n = points.length,\n      indexes = [0, 1],\n      size = 2;\n\n  for (var i = 2; i < n; ++i) {\n    while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size;\n    indexes[size++] = i;\n  }\n\n  return indexes.slice(0, size); // remove popped points\n}\n\nvar hull = function(points) {\n  if ((n = points.length) < 3) return null;\n\n  var i,\n      n,\n      sortedPoints = new Array(n),\n      flippedPoints = new Array(n);\n\n  for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i];\n  sortedPoints.sort(lexicographicOrder);\n  for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];\n\n  var upperIndexes = computeUpperHullIndexes(sortedPoints),\n      lowerIndexes = computeUpperHullIndexes(flippedPoints);\n\n  // Construct the hull polygon, removing possible duplicate endpoints.\n  var skipLeft = lowerIndexes[0] === upperIndexes[0],\n      skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],\n      hull = [];\n\n  // Add upper hull in right-to-l order.\n  // Then add lower hull in left-to-right order.\n  for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]);\n  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]);\n\n  return hull;\n};\n\nvar contains = function(polygon, point) {\n  var n = polygon.length,\n      p = polygon[n - 1],\n      x = point[0], y = point[1],\n      x0 = p[0], y0 = p[1],\n      x1, y1,\n      inside = false;\n\n  for (var i = 0; i < n; ++i) {\n    p = polygon[i], x1 = p[0], y1 = p[1];\n    if (((y1 > y) !== (y0 > y)) && (x < (x0 - x1) * (y - y1) / (y0 - y1) + x1)) inside = !inside;\n    x0 = x1, y0 = y1;\n  }\n\n  return inside;\n};\n\nvar length$1 = function(polygon) {\n  var i = -1,\n      n = polygon.length,\n      b = polygon[n - 1],\n      xa,\n      ya,\n      xb = b[0],\n      yb = b[1],\n      perimeter = 0;\n\n  while (++i < n) {\n    xa = xb;\n    ya = yb;\n    b = polygon[i];\n    xb = b[0];\n    yb = b[1];\n    xa -= xb;\n    ya -= yb;\n    perimeter += Math.sqrt(xa * xa + ya * ya);\n  }\n\n  return perimeter;\n};\n\nvar pi$1 = Math.PI;\nvar tau$1 = 2 * pi$1;\nvar epsilon = 1e-6;\nvar tauEpsilon = tau$1 - epsilon;\n\nfunction Path() {\n  this._x0 = this._y0 = // start of current subpath\n  this._x1 = this._y1 = null; // end of current subpath\n  this._ = \"\";\n}\n\nfunction path() {\n  return new Path;\n}\n\nPath.prototype = path.prototype = {\n  constructor: Path,\n  moveTo: function(x, y) {\n    this._ += \"M\" + (this._x0 = this._x1 = +x) + \",\" + (this._y0 = this._y1 = +y);\n  },\n  closePath: function() {\n    if (this._x1 !== null) {\n      this._x1 = this._x0, this._y1 = this._y0;\n      this._ += \"Z\";\n    }\n  },\n  lineTo: function(x, y) {\n    this._ += \"L\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n  },\n  quadraticCurveTo: function(x1, y1, x, y) {\n    this._ += \"Q\" + (+x1) + \",\" + (+y1) + \",\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n  },\n  bezierCurveTo: function(x1, y1, x2, y2, x, y) {\n    this._ += \"C\" + (+x1) + \",\" + (+y1) + \",\" + (+x2) + \",\" + (+y2) + \",\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n  },\n  arcTo: function(x1, y1, x2, y2, r) {\n    x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;\n    var x0 = this._x1,\n        y0 = this._y1,\n        x21 = x2 - x1,\n        y21 = y2 - y1,\n        x01 = x0 - x1,\n        y01 = y0 - y1,\n        l01_2 = x01 * x01 + y01 * y01;\n\n    // Is the radius negative? Error.\n    if (r < 0) throw new Error(\"negative radius: \" + r);\n\n    // Is this path empty? Move to (x1,y1).\n    if (this._x1 === null) {\n      this._ += \"M\" + (this._x1 = x1) + \",\" + (this._y1 = y1);\n    }\n\n    // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.\n    else if (!(l01_2 > epsilon)) {}\n\n    // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?\n    // Equivalently, is (x1,y1) coincident with (x2,y2)?\n    // Or, is the radius zero? Line to (x1,y1).\n    else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon) || !r) {\n      this._ += \"L\" + (this._x1 = x1) + \",\" + (this._y1 = y1);\n    }\n\n    // Otherwise, draw an arc!\n    else {\n      var x20 = x2 - x0,\n          y20 = y2 - y0,\n          l21_2 = x21 * x21 + y21 * y21,\n          l20_2 = x20 * x20 + y20 * y20,\n          l21 = Math.sqrt(l21_2),\n          l01 = Math.sqrt(l01_2),\n          l = r * Math.tan((pi$1 - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),\n          t01 = l / l01,\n          t21 = l / l21;\n\n      // If the start tangent is not coincident with (x0,y0), line to.\n      if (Math.abs(t01 - 1) > epsilon) {\n        this._ += \"L\" + (x1 + t01 * x01) + \",\" + (y1 + t01 * y01);\n      }\n\n      this._ += \"A\" + r + \",\" + r + \",0,0,\" + (+(y01 * x20 > x01 * y20)) + \",\" + (this._x1 = x1 + t21 * x21) + \",\" + (this._y1 = y1 + t21 * y21);\n    }\n  },\n  arc: function(x, y, r, a0, a1, ccw) {\n    x = +x, y = +y, r = +r;\n    var dx = r * Math.cos(a0),\n        dy = r * Math.sin(a0),\n        x0 = x + dx,\n        y0 = y + dy,\n        cw = 1 ^ ccw,\n        da = ccw ? a0 - a1 : a1 - a0;\n\n    // Is the radius negative? Error.\n    if (r < 0) throw new Error(\"negative radius: \" + r);\n\n    // Is this path empty? Move to (x0,y0).\n    if (this._x1 === null) {\n      this._ += \"M\" + x0 + \",\" + y0;\n    }\n\n    // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).\n    else if (Math.abs(this._x1 - x0) > epsilon || Math.abs(this._y1 - y0) > epsilon) {\n      this._ += \"L\" + x0 + \",\" + y0;\n    }\n\n    // Is this arc empty? We’re done.\n    if (!r) return;\n\n    // Is this a complete circle? Draw two arcs to complete the circle.\n    if (da > tauEpsilon) {\n      this._ += \"A\" + r + \",\" + r + \",0,1,\" + cw + \",\" + (x - dx) + \",\" + (y - dy) + \"A\" + r + \",\" + r + \",0,1,\" + cw + \",\" + (this._x1 = x0) + \",\" + (this._y1 = y0);\n    }\n\n    // Otherwise, draw an arc!\n    else {\n      if (da < 0) da = da % tau$1 + tau$1;\n      this._ += \"A\" + r + \",\" + r + \",0,\" + (+(da >= pi$1)) + \",\" + cw + \",\" + (this._x1 = x + r * Math.cos(a1)) + \",\" + (this._y1 = y + r * Math.sin(a1));\n    }\n  },\n  rect: function(x, y, w, h) {\n    this._ += \"M\" + (this._x0 = this._x1 = +x) + \",\" + (this._y0 = this._y1 = +y) + \"h\" + (+w) + \"v\" + (+h) + \"h\" + (-w) + \"Z\";\n  },\n  toString: function() {\n    return this._;\n  }\n};\n\nvar tree_add = function(d) {\n  var x = +this._x.call(null, d),\n      y = +this._y.call(null, d);\n  return add(this.cover(x, y), x, y, d);\n};\n\nfunction add(tree, x, y, d) {\n  if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points\n\n  var parent,\n      node = tree._root,\n      leaf = {data: d},\n      x0 = tree._x0,\n      y0 = tree._y0,\n      x1 = tree._x1,\n      y1 = tree._y1,\n      xm,\n      ym,\n      xp,\n      yp,\n      right,\n      bottom,\n      i,\n      j;\n\n  // If the tree is empty, initialize the root as a leaf.\n  if (!node) return tree._root = leaf, tree;\n\n  // Find the existing leaf for the new point, or add it.\n  while (node.length) {\n    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;\n    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;\n    if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;\n  }\n\n  // Is the new point is exactly coincident with the existing point?\n  xp = +tree._x.call(null, node.data);\n  yp = +tree._y.call(null, node.data);\n  if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;\n\n  // Otherwise, split the leaf node until the old and new point are separated.\n  do {\n    parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);\n    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;\n    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;\n  } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));\n  return parent[j] = node, parent[i] = leaf, tree;\n}\n\nfunction addAll(data) {\n  var d, i, n = data.length,\n      x,\n      y,\n      xz = new Array(n),\n      yz = new Array(n),\n      x0 = Infinity,\n      y0 = Infinity,\n      x1 = -Infinity,\n      y1 = -Infinity;\n\n  // Compute the points and their extent.\n  for (i = 0; i < n; ++i) {\n    if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;\n    xz[i] = x;\n    yz[i] = y;\n    if (x < x0) x0 = x;\n    if (x > x1) x1 = x;\n    if (y < y0) y0 = y;\n    if (y > y1) y1 = y;\n  }\n\n  // If there were no (valid) points, inherit the existing extent.\n  if (x1 < x0) x0 = this._x0, x1 = this._x1;\n  if (y1 < y0) y0 = this._y0, y1 = this._y1;\n\n  // Expand the tree to cover the new points.\n  this.cover(x0, y0).cover(x1, y1);\n\n  // Add the new points.\n  for (i = 0; i < n; ++i) {\n    add(this, xz[i], yz[i], data[i]);\n  }\n\n  return this;\n}\n\nvar tree_cover = function(x, y) {\n  if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points\n\n  var x0 = this._x0,\n      y0 = this._y0,\n      x1 = this._x1,\n      y1 = this._y1;\n\n  // If the quadtree has no extent, initialize them.\n  // Integer extent are necessary so that if we later double the extent,\n  // the existing quadrant boundaries don’t change due to floating point error!\n  if (isNaN(x0)) {\n    x1 = (x0 = Math.floor(x)) + 1;\n    y1 = (y0 = Math.floor(y)) + 1;\n  }\n\n  // Otherwise, double repeatedly to cover.\n  else if (x0 > x || x > x1 || y0 > y || y > y1) {\n    var z = x1 - x0,\n        node = this._root,\n        parent,\n        i;\n\n    switch (i = (y < (y0 + y1) / 2) << 1 | (x < (x0 + x1) / 2)) {\n      case 0: {\n        do parent = new Array(4), parent[i] = node, node = parent;\n        while (z *= 2, x1 = x0 + z, y1 = y0 + z, x > x1 || y > y1);\n        break;\n      }\n      case 1: {\n        do parent = new Array(4), parent[i] = node, node = parent;\n        while (z *= 2, x0 = x1 - z, y1 = y0 + z, x0 > x || y > y1);\n        break;\n      }\n      case 2: {\n        do parent = new Array(4), parent[i] = node, node = parent;\n        while (z *= 2, x1 = x0 + z, y0 = y1 - z, x > x1 || y0 > y);\n        break;\n      }\n      case 3: {\n        do parent = new Array(4), parent[i] = node, node = parent;\n        while (z *= 2, x0 = x1 - z, y0 = y1 - z, x0 > x || y0 > y);\n        break;\n      }\n    }\n\n    if (this._root && this._root.length) this._root = node;\n  }\n\n  // If the quadtree covers the point already, just return.\n  else return this;\n\n  this._x0 = x0;\n  this._y0 = y0;\n  this._x1 = x1;\n  this._y1 = y1;\n  return this;\n};\n\nvar tree_data = function() {\n  var data = [];\n  this.visit(function(node) {\n    if (!node.length) do data.push(node.data); while (node = node.next)\n  });\n  return data;\n};\n\nvar tree_extent = function(_) {\n  return arguments.length\n      ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])\n      : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];\n};\n\nvar Quad = function(node, x0, y0, x1, y1) {\n  this.node = node;\n  this.x0 = x0;\n  this.y0 = y0;\n  this.x1 = x1;\n  this.y1 = y1;\n};\n\nvar tree_find = function(x, y, radius) {\n  var data,\n      x0 = this._x0,\n      y0 = this._y0,\n      x1,\n      y1,\n      x2,\n      y2,\n      x3 = this._x1,\n      y3 = this._y1,\n      quads = [],\n      node = this._root,\n      q,\n      i;\n\n  if (node) quads.push(new Quad(node, x0, y0, x3, y3));\n  if (radius == null) radius = Infinity;\n  else {\n    x0 = x - radius, y0 = y - radius;\n    x3 = x + radius, y3 = y + radius;\n    radius *= radius;\n  }\n\n  while (q = quads.pop()) {\n\n    // Stop searching if this quadrant can’t contain a closer node.\n    if (!(node = q.node)\n        || (x1 = q.x0) > x3\n        || (y1 = q.y0) > y3\n        || (x2 = q.x1) < x0\n        || (y2 = q.y1) < y0) continue;\n\n    // Bisect the current quadrant.\n    if (node.length) {\n      var xm = (x1 + x2) / 2,\n          ym = (y1 + y2) / 2;\n\n      quads.push(\n        new Quad(node[3], xm, ym, x2, y2),\n        new Quad(node[2], x1, ym, xm, y2),\n        new Quad(node[1], xm, y1, x2, ym),\n        new Quad(node[0], x1, y1, xm, ym)\n      );\n\n      // Visit the closest quadrant first.\n      if (i = (y >= ym) << 1 | (x >= xm)) {\n        q = quads[quads.length - 1];\n        quads[quads.length - 1] = quads[quads.length - 1 - i];\n        quads[quads.length - 1 - i] = q;\n      }\n    }\n\n    // Visit this point. (Visiting coincident points isn’t necessary!)\n    else {\n      var dx = x - +this._x.call(null, node.data),\n          dy = y - +this._y.call(null, node.data),\n          d2 = dx * dx + dy * dy;\n      if (d2 < radius) {\n        var d = Math.sqrt(radius = d2);\n        x0 = x - d, y0 = y - d;\n        x3 = x + d, y3 = y + d;\n        data = node.data;\n      }\n    }\n  }\n\n  return data;\n};\n\nvar tree_remove = function(d) {\n  if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points\n\n  var parent,\n      node = this._root,\n      retainer,\n      previous,\n      next,\n      x0 = this._x0,\n      y0 = this._y0,\n      x1 = this._x1,\n      y1 = this._y1,\n      x,\n      y,\n      xm,\n      ym,\n      right,\n      bottom,\n      i,\n      j;\n\n  // If the tree is empty, initialize the root as a leaf.\n  if (!node) return this;\n\n  // Find the leaf node for the point.\n  // While descending, also retain the deepest parent with a non-removed sibling.\n  if (node.length) while (true) {\n    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;\n    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;\n    if (!(parent = node, node = node[i = bottom << 1 | right])) return this;\n    if (!node.length) break;\n    if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;\n  }\n\n  // Find the point to remove.\n  while (node.data !== d) if (!(previous = node, node = node.next)) return this;\n  if (next = node.next) delete node.next;\n\n  // If there are multiple coincident points, remove just the point.\n  if (previous) return (next ? previous.next = next : delete previous.next), this;\n\n  // If this is the root point, remove it.\n  if (!parent) return this._root = next, this;\n\n  // Remove this leaf.\n  next ? parent[i] = next : delete parent[i];\n\n  // If the parent now contains exactly one leaf, collapse superfluous parents.\n  if ((node = parent[0] || parent[1] || parent[2] || parent[3])\n      && node === (parent[3] || parent[2] || parent[1] || parent[0])\n      && !node.length) {\n    if (retainer) retainer[j] = node;\n    else this._root = node;\n  }\n\n  return this;\n};\n\nfunction removeAll(data) {\n  for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);\n  return this;\n}\n\nvar tree_root = function() {\n  return this._root;\n};\n\nvar tree_size = function() {\n  var size = 0;\n  this.visit(function(node) {\n    if (!node.length) do ++size; while (node = node.next)\n  });\n  return size;\n};\n\nvar tree_visit = function(callback) {\n  var quads = [], q, node = this._root, child, x0, y0, x1, y1;\n  if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));\n  while (q = quads.pop()) {\n    if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {\n      var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;\n      if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));\n      if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));\n      if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));\n      if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));\n    }\n  }\n  return this;\n};\n\nvar tree_visitAfter = function(callback) {\n  var quads = [], next = [], q;\n  if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));\n  while (q = quads.pop()) {\n    var node = q.node;\n    if (node.length) {\n      var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;\n      if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));\n      if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));\n      if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));\n      if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));\n    }\n    next.push(q);\n  }\n  while (q = next.pop()) {\n    callback(q.node, q.x0, q.y0, q.x1, q.y1);\n  }\n  return this;\n};\n\nfunction defaultX(d) {\n  return d[0];\n}\n\nvar tree_x = function(_) {\n  return arguments.length ? (this._x = _, this) : this._x;\n};\n\nfunction defaultY(d) {\n  return d[1];\n}\n\nvar tree_y = function(_) {\n  return arguments.length ? (this._y = _, this) : this._y;\n};\n\nfunction quadtree(nodes, x, y) {\n  var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN);\n  return nodes == null ? tree : tree.addAll(nodes);\n}\n\nfunction Quadtree(x, y, x0, y0, x1, y1) {\n  this._x = x;\n  this._y = y;\n  this._x0 = x0;\n  this._y0 = y0;\n  this._x1 = x1;\n  this._y1 = y1;\n  this._root = undefined;\n}\n\nfunction leaf_copy(leaf) {\n  var copy = {data: leaf.data}, next = copy;\n  while (leaf = leaf.next) next = next.next = {data: leaf.data};\n  return copy;\n}\n\nvar treeProto = quadtree.prototype = Quadtree.prototype;\n\ntreeProto.copy = function() {\n  var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),\n      node = this._root,\n      nodes,\n      child;\n\n  if (!node) return copy;\n\n  if (!node.length) return copy._root = leaf_copy(node), copy;\n\n  nodes = [{source: node, target: copy._root = new Array(4)}];\n  while (node = nodes.pop()) {\n    for (var i = 0; i < 4; ++i) {\n      if (child = node.source[i]) {\n        if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)});\n        else node.target[i] = leaf_copy(child);\n      }\n    }\n  }\n\n  return copy;\n};\n\ntreeProto.add = tree_add;\ntreeProto.addAll = addAll;\ntreeProto.cover = tree_cover;\ntreeProto.data = tree_data;\ntreeProto.extent = tree_extent;\ntreeProto.find = tree_find;\ntreeProto.remove = tree_remove;\ntreeProto.removeAll = removeAll;\ntreeProto.root = tree_root;\ntreeProto.size = tree_size;\ntreeProto.visit = tree_visit;\ntreeProto.visitAfter = tree_visitAfter;\ntreeProto.x = tree_x;\ntreeProto.y = tree_y;\n\nvar slice$1 = [].slice;\n\nvar noabort = {};\n\nfunction Queue(size) {\n  if (!(size >= 1)) throw new Error;\n  this._size = size;\n  this._call =\n  this._error = null;\n  this._tasks = [];\n  this._data = [];\n  this._waiting =\n  this._active =\n  this._ended =\n  this._start = 0; // inside a synchronous task callback?\n}\n\nQueue.prototype = queue.prototype = {\n  constructor: Queue,\n  defer: function(callback) {\n    if (typeof callback !== \"function\" || this._call) throw new Error;\n    if (this._error != null) return this;\n    var t = slice$1.call(arguments, 1);\n    t.push(callback);\n    ++this._waiting, this._tasks.push(t);\n    poke(this);\n    return this;\n  },\n  abort: function() {\n    if (this._error == null) abort(this, new Error(\"abort\"));\n    return this;\n  },\n  await: function(callback) {\n    if (typeof callback !== \"function\" || this._call) throw new Error;\n    this._call = function(error, results) { callback.apply(null, [error].concat(results)); };\n    maybeNotify(this);\n    return this;\n  },\n  awaitAll: function(callback) {\n    if (typeof callback !== \"function\" || this._call) throw new Error;\n    this._call = callback;\n    maybeNotify(this);\n    return this;\n  }\n};\n\nfunction poke(q) {\n  if (!q._start) {\n    try { start(q); } // let the current task complete\n    catch (e) {\n      if (q._tasks[q._ended + q._active - 1]) abort(q, e); // task errored synchronously\n      else if (!q._data) throw e; // await callback errored synchronously\n    }\n  }\n}\n\nfunction start(q) {\n  while (q._start = q._waiting && q._active < q._size) {\n    var i = q._ended + q._active,\n        t = q._tasks[i],\n        j = t.length - 1,\n        c = t[j];\n    t[j] = end(q, i);\n    --q._waiting, ++q._active;\n    t = c.apply(null, t);\n    if (!q._tasks[i]) continue; // task finished synchronously\n    q._tasks[i] = t || noabort;\n  }\n}\n\nfunction end(q, i) {\n  return function(e, r) {\n    if (!q._tasks[i]) return; // ignore multiple callbacks\n    --q._active, ++q._ended;\n    q._tasks[i] = null;\n    if (q._error != null) return; // ignore secondary errors\n    if (e != null) {\n      abort(q, e);\n    } else {\n      q._data[i] = r;\n      if (q._waiting) poke(q);\n      else maybeNotify(q);\n    }\n  };\n}\n\nfunction abort(q, e) {\n  var i = q._tasks.length, t;\n  q._error = e; // ignore active callbacks\n  q._data = undefined; // allow gc\n  q._waiting = NaN; // prevent starting\n\n  while (--i >= 0) {\n    if (t = q._tasks[i]) {\n      q._tasks[i] = null;\n      if (t.abort) {\n        try { t.abort(); }\n        catch (e) { /* ignore */ }\n      }\n    }\n  }\n\n  q._active = NaN; // allow notification\n  maybeNotify(q);\n}\n\nfunction maybeNotify(q) {\n  if (!q._active && q._call) {\n    var d = q._data;\n    q._data = undefined; // allow gc\n    q._call(q._error, d);\n  }\n}\n\nfunction queue(concurrency) {\n  return new Queue(arguments.length ? +concurrency : Infinity);\n}\n\nvar constant$2 = function(x) {\n  return function constant() {\n    return x;\n  };\n};\n\nvar epsilon$1 = 1e-12;\nvar pi$2 = Math.PI;\nvar halfPi$1 = pi$2 / 2;\nvar tau$2 = 2 * pi$2;\n\nfunction arcInnerRadius(d) {\n  return d.innerRadius;\n}\n\nfunction arcOuterRadius(d) {\n  return d.outerRadius;\n}\n\nfunction arcStartAngle(d) {\n  return d.startAngle;\n}\n\nfunction arcEndAngle(d) {\n  return d.endAngle;\n}\n\nfunction arcPadAngle(d) {\n  return d && d.padAngle; // Note: optional!\n}\n\nfunction asin(x) {\n  return x >= 1 ? halfPi$1 : x <= -1 ? -halfPi$1 : Math.asin(x);\n}\n\nfunction intersect(x0, y0, x1, y1, x2, y2, x3, y3) {\n  var x10 = x1 - x0, y10 = y1 - y0,\n      x32 = x3 - x2, y32 = y3 - y2,\n      t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10);\n  return [x0 + t * x10, y0 + t * y10];\n}\n\n// Compute perpendicular offset line of length rc.\n// http://mathworld.wolfram.com/Circle-LineIntersection.html\nfunction cornerTangents(x0, y0, x1, y1, r1, rc, cw) {\n  var x01 = x0 - x1,\n      y01 = y0 - y1,\n      lo = (cw ? rc : -rc) / Math.sqrt(x01 * x01 + y01 * y01),\n      ox = lo * y01,\n      oy = -lo * x01,\n      x11 = x0 + ox,\n      y11 = y0 + oy,\n      x10 = x1 + ox,\n      y10 = y1 + oy,\n      x00 = (x11 + x10) / 2,\n      y00 = (y11 + y10) / 2,\n      dx = x10 - x11,\n      dy = y10 - y11,\n      d2 = dx * dx + dy * dy,\n      r = r1 - rc,\n      D = x11 * y10 - x10 * y11,\n      d = (dy < 0 ? -1 : 1) * Math.sqrt(Math.max(0, r * r * d2 - D * D)),\n      cx0 = (D * dy - dx * d) / d2,\n      cy0 = (-D * dx - dy * d) / d2,\n      cx1 = (D * dy + dx * d) / d2,\n      cy1 = (-D * dx + dy * d) / d2,\n      dx0 = cx0 - x00,\n      dy0 = cy0 - y00,\n      dx1 = cx1 - x00,\n      dy1 = cy1 - y00;\n\n  // Pick the closer of the two intersection points.\n  // TODO Is there a faster way to determine which intersection to use?\n  if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;\n\n  return {\n    cx: cx0,\n    cy: cy0,\n    x01: -ox,\n    y01: -oy,\n    x11: cx0 * (r1 / r - 1),\n    y11: cy0 * (r1 / r - 1)\n  };\n}\n\nvar arc = function() {\n  var innerRadius = arcInnerRadius,\n      outerRadius = arcOuterRadius,\n      cornerRadius = constant$2(0),\n      padRadius = null,\n      startAngle = arcStartAngle,\n      endAngle = arcEndAngle,\n      padAngle = arcPadAngle,\n      context = null;\n\n  function arc() {\n    var buffer,\n        r,\n        r0 = +innerRadius.apply(this, arguments),\n        r1 = +outerRadius.apply(this, arguments),\n        a0 = startAngle.apply(this, arguments) - halfPi$1,\n        a1 = endAngle.apply(this, arguments) - halfPi$1,\n        da = Math.abs(a1 - a0),\n        cw = a1 > a0;\n\n    if (!context) context = buffer = path();\n\n    // Ensure that the outer radius is always larger than the inner radius.\n    if (r1 < r0) r = r1, r1 = r0, r0 = r;\n\n    // Is it a point?\n    if (!(r1 > epsilon$1)) context.moveTo(0, 0);\n\n    // Or is it a circle or annulus?\n    else if (da > tau$2 - epsilon$1) {\n      context.moveTo(r1 * Math.cos(a0), r1 * Math.sin(a0));\n      context.arc(0, 0, r1, a0, a1, !cw);\n      if (r0 > epsilon$1) {\n        context.moveTo(r0 * Math.cos(a1), r0 * Math.sin(a1));\n        context.arc(0, 0, r0, a1, a0, cw);\n      }\n    }\n\n    // Or is it a circular or annular sector?\n    else {\n      var a01 = a0,\n          a11 = a1,\n          a00 = a0,\n          a10 = a1,\n          da0 = da,\n          da1 = da,\n          ap = padAngle.apply(this, arguments) / 2,\n          rp = (ap > epsilon$1) && (padRadius ? +padRadius.apply(this, arguments) : Math.sqrt(r0 * r0 + r1 * r1)),\n          rc = Math.min(Math.abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),\n          rc0 = rc,\n          rc1 = rc,\n          t0,\n          t1;\n\n      // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.\n      if (rp > epsilon$1) {\n        var p0 = asin(rp / r0 * Math.sin(ap)),\n            p1 = asin(rp / r1 * Math.sin(ap));\n        if ((da0 -= p0 * 2) > epsilon$1) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;\n        else da0 = 0, a00 = a10 = (a0 + a1) / 2;\n        if ((da1 -= p1 * 2) > epsilon$1) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;\n        else da1 = 0, a01 = a11 = (a0 + a1) / 2;\n      }\n\n      var x01 = r1 * Math.cos(a01),\n          y01 = r1 * Math.sin(a01),\n          x10 = r0 * Math.cos(a10),\n          y10 = r0 * Math.sin(a10);\n\n      // Apply rounded corners?\n      if (rc > epsilon$1) {\n        var x11 = r1 * Math.cos(a11),\n            y11 = r1 * Math.sin(a11),\n            x00 = r0 * Math.cos(a00),\n            y00 = r0 * Math.sin(a00);\n\n        // Restrict the corner radius according to the sector angle.\n        if (da < pi$2) {\n          var oc = da0 > epsilon$1 ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10],\n              ax = x01 - oc[0],\n              ay = y01 - oc[1],\n              bx = x11 - oc[0],\n              by = y11 - oc[1],\n              kc = 1 / Math.sin(Math.acos((ax * bx + ay * by) / (Math.sqrt(ax * ax + ay * ay) * Math.sqrt(bx * bx + by * by))) / 2),\n              lc = Math.sqrt(oc[0] * oc[0] + oc[1] * oc[1]);\n          rc0 = Math.min(rc, (r0 - lc) / (kc - 1));\n          rc1 = Math.min(rc, (r1 - lc) / (kc + 1));\n        }\n      }\n\n      // Is the sector collapsed to a line?\n      if (!(da1 > epsilon$1)) context.moveTo(x01, y01);\n\n      // Does the sector’s outer ring have rounded corners?\n      else if (rc1 > epsilon$1) {\n        t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);\n        t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);\n\n        context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);\n\n        // Have the corners merged?\n        if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw);\n\n        // Otherwise, draw the two corners and the ring.\n        else {\n          context.arc(t0.cx, t0.cy, rc1, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw);\n          context.arc(0, 0, r1, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), !cw);\n          context.arc(t1.cx, t1.cy, rc1, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw);\n        }\n      }\n\n      // Or is the outer ring just a circular arc?\n      else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);\n\n      // Is there no inner ring, and it’s a circular sector?\n      // Or perhaps it’s an annular sector collapsed due to padding?\n      if (!(r0 > epsilon$1) || !(da0 > epsilon$1)) context.lineTo(x10, y10);\n\n      // Does the sector’s inner ring (or point) have rounded corners?\n      else if (rc0 > epsilon$1) {\n        t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);\n        t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);\n\n        context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);\n\n        // Have the corners merged?\n        if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t1.y01, t1.x01), !cw);\n\n        // Otherwise, draw the two corners and the ring.\n        else {\n          context.arc(t0.cx, t0.cy, rc0, Math.atan2(t0.y01, t0.x01), Math.atan2(t0.y11, t0.x11), !cw);\n          context.arc(0, 0, r0, Math.atan2(t0.cy + t0.y11, t0.cx + t0.x11), Math.atan2(t1.cy + t1.y11, t1.cx + t1.x11), cw);\n          context.arc(t1.cx, t1.cy, rc0, Math.atan2(t1.y11, t1.x11), Math.atan2(t1.y01, t1.x01), !cw);\n        }\n      }\n\n      // Or is the inner ring just a circular arc?\n      else context.arc(0, 0, r0, a10, a00, cw);\n    }\n\n    context.closePath();\n\n    if (buffer) return context = null, buffer + \"\" || null;\n  }\n\n  arc.centroid = function() {\n    var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,\n        a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi$2 / 2;\n    return [Math.cos(a) * r, Math.sin(a) * r];\n  };\n\n  arc.innerRadius = function(_) {\n    return arguments.length ? (innerRadius = typeof _ === \"function\" ? _ : constant$2(+_), arc) : innerRadius;\n  };\n\n  arc.outerRadius = function(_) {\n    return arguments.length ? (outerRadius = typeof _ === \"function\" ? _ : constant$2(+_), arc) : outerRadius;\n  };\n\n  arc.cornerRadius = function(_) {\n    return arguments.length ? (cornerRadius = typeof _ === \"function\" ? _ : constant$2(+_), arc) : cornerRadius;\n  };\n\n  arc.padRadius = function(_) {\n    return arguments.length ? (padRadius = _ == null ? null : typeof _ === \"function\" ? _ : constant$2(+_), arc) : padRadius;\n  };\n\n  arc.startAngle = function(_) {\n    return arguments.length ? (startAngle = typeof _ === \"function\" ? _ : constant$2(+_), arc) : startAngle;\n  };\n\n  arc.endAngle = function(_) {\n    return arguments.length ? (endAngle = typeof _ === \"function\" ? _ : constant$2(+_), arc) : endAngle;\n  };\n\n  arc.padAngle = function(_) {\n    return arguments.length ? (padAngle = typeof _ === \"function\" ? _ : constant$2(+_), arc) : padAngle;\n  };\n\n  arc.context = function(_) {\n    return arguments.length ? ((context = _ == null ? null : _), arc) : context;\n  };\n\n  return arc;\n};\n\nfunction Linear(context) {\n  this._context = context;\n}\n\nLinear.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; // proceed\n      default: this._context.lineTo(x, y); break;\n    }\n  }\n};\n\nvar curveLinear = function(context) {\n  return new Linear(context);\n};\n\nfunction x(p) {\n  return p[0];\n}\n\nfunction y(p) {\n  return p[1];\n}\n\nvar line = function() {\n  var x$$1 = x,\n      y$$1 = y,\n      defined = constant$2(true),\n      context = null,\n      curve = curveLinear,\n      output = null;\n\n  function line(data) {\n    var i,\n        n = data.length,\n        d,\n        defined0 = false,\n        buffer;\n\n    if (context == null) output = curve(buffer = path());\n\n    for (i = 0; i <= n; ++i) {\n      if (!(i < n && defined(d = data[i], i, data)) === defined0) {\n        if (defined0 = !defined0) output.lineStart();\n        else output.lineEnd();\n      }\n      if (defined0) output.point(+x$$1(d, i, data), +y$$1(d, i, data));\n    }\n\n    if (buffer) return output = null, buffer + \"\" || null;\n  }\n\n  line.x = function(_) {\n    return arguments.length ? (x$$1 = typeof _ === \"function\" ? _ : constant$2(+_), line) : x$$1;\n  };\n\n  line.y = function(_) {\n    return arguments.length ? (y$$1 = typeof _ === \"function\" ? _ : constant$2(+_), line) : y$$1;\n  };\n\n  line.defined = function(_) {\n    return arguments.length ? (defined = typeof _ === \"function\" ? _ : constant$2(!!_), line) : defined;\n  };\n\n  line.curve = function(_) {\n    return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;\n  };\n\n  line.context = function(_) {\n    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;\n  };\n\n  return line;\n};\n\nvar area$1 = function() {\n  var x0 = x,\n      x1 = null,\n      y0 = constant$2(0),\n      y1 = y,\n      defined = constant$2(true),\n      context = null,\n      curve = curveLinear,\n      output = null;\n\n  function area(data) {\n    var i,\n        j,\n        k,\n        n = data.length,\n        d,\n        defined0 = false,\n        buffer,\n        x0z = new Array(n),\n        y0z = new Array(n);\n\n    if (context == null) output = curve(buffer = path());\n\n    for (i = 0; i <= n; ++i) {\n      if (!(i < n && defined(d = data[i], i, data)) === defined0) {\n        if (defined0 = !defined0) {\n          j = i;\n          output.areaStart();\n          output.lineStart();\n        } else {\n          output.lineEnd();\n          output.lineStart();\n          for (k = i - 1; k >= j; --k) {\n            output.point(x0z[k], y0z[k]);\n          }\n          output.lineEnd();\n          output.areaEnd();\n        }\n      }\n      if (defined0) {\n        x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);\n        output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);\n      }\n    }\n\n    if (buffer) return output = null, buffer + \"\" || null;\n  }\n\n  function arealine() {\n    return line().defined(defined).curve(curve).context(context);\n  }\n\n  area.x = function(_) {\n    return arguments.length ? (x0 = typeof _ === \"function\" ? _ : constant$2(+_), x1 = null, area) : x0;\n  };\n\n  area.x0 = function(_) {\n    return arguments.length ? (x0 = typeof _ === \"function\" ? _ : constant$2(+_), area) : x0;\n  };\n\n  area.x1 = function(_) {\n    return arguments.length ? (x1 = _ == null ? null : typeof _ === \"function\" ? _ : constant$2(+_), area) : x1;\n  };\n\n  area.y = function(_) {\n    return arguments.length ? (y0 = typeof _ === \"function\" ? _ : constant$2(+_), y1 = null, area) : y0;\n  };\n\n  area.y0 = function(_) {\n    return arguments.length ? (y0 = typeof _ === \"function\" ? _ : constant$2(+_), area) : y0;\n  };\n\n  area.y1 = function(_) {\n    return arguments.length ? (y1 = _ == null ? null : typeof _ === \"function\" ? _ : constant$2(+_), area) : y1;\n  };\n\n  area.lineX0 =\n  area.lineY0 = function() {\n    return arealine().x(x0).y(y0);\n  };\n\n  area.lineY1 = function() {\n    return arealine().x(x0).y(y1);\n  };\n\n  area.lineX1 = function() {\n    return arealine().x(x1).y(y0);\n  };\n\n  area.defined = function(_) {\n    return arguments.length ? (defined = typeof _ === \"function\" ? _ : constant$2(!!_), area) : defined;\n  };\n\n  area.curve = function(_) {\n    return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;\n  };\n\n  area.context = function(_) {\n    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;\n  };\n\n  return area;\n};\n\nvar descending$1 = function(a, b) {\n  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;\n};\n\nvar identity$1 = function(d) {\n  return d;\n};\n\nvar pie = function() {\n  var value = identity$1,\n      sortValues = descending$1,\n      sort = null,\n      startAngle = constant$2(0),\n      endAngle = constant$2(tau$2),\n      padAngle = constant$2(0);\n\n  function pie(data) {\n    var i,\n        n = data.length,\n        j,\n        k,\n        sum = 0,\n        index = new Array(n),\n        arcs = new Array(n),\n        a0 = +startAngle.apply(this, arguments),\n        da = Math.min(tau$2, Math.max(-tau$2, endAngle.apply(this, arguments) - a0)),\n        a1,\n        p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),\n        pa = p * (da < 0 ? -1 : 1),\n        v;\n\n    for (i = 0; i < n; ++i) {\n      if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {\n        sum += v;\n      }\n    }\n\n    // Optionally sort the arcs by previously-computed values or by data.\n    if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });\n    else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });\n\n    // Compute the arcs! They are stored in the original data's order.\n    for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {\n      j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {\n        data: data[j],\n        index: i,\n        value: v,\n        startAngle: a0,\n        endAngle: a1,\n        padAngle: p\n      };\n    }\n\n    return arcs;\n  }\n\n  pie.value = function(_) {\n    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant$2(+_), pie) : value;\n  };\n\n  pie.sortValues = function(_) {\n    return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;\n  };\n\n  pie.sort = function(_) {\n    return arguments.length ? (sort = _, sortValues = null, pie) : sort;\n  };\n\n  pie.startAngle = function(_) {\n    return arguments.length ? (startAngle = typeof _ === \"function\" ? _ : constant$2(+_), pie) : startAngle;\n  };\n\n  pie.endAngle = function(_) {\n    return arguments.length ? (endAngle = typeof _ === \"function\" ? _ : constant$2(+_), pie) : endAngle;\n  };\n\n  pie.padAngle = function(_) {\n    return arguments.length ? (padAngle = typeof _ === \"function\" ? _ : constant$2(+_), pie) : padAngle;\n  };\n\n  return pie;\n};\n\nvar curveRadialLinear = curveRadial(curveLinear);\n\nfunction Radial(curve) {\n  this._curve = curve;\n}\n\nRadial.prototype = {\n  areaStart: function() {\n    this._curve.areaStart();\n  },\n  areaEnd: function() {\n    this._curve.areaEnd();\n  },\n  lineStart: function() {\n    this._curve.lineStart();\n  },\n  lineEnd: function() {\n    this._curve.lineEnd();\n  },\n  point: function(a, r) {\n    this._curve.point(r * Math.sin(a), r * -Math.cos(a));\n  }\n};\n\nfunction curveRadial(curve) {\n\n  function radial(context) {\n    return new Radial(curve(context));\n  }\n\n  radial._curve = curve;\n\n  return radial;\n}\n\nfunction radialLine(l) {\n  var c = l.curve;\n\n  l.angle = l.x, delete l.x;\n  l.radius = l.y, delete l.y;\n\n  l.curve = function(_) {\n    return arguments.length ? c(curveRadial(_)) : c()._curve;\n  };\n\n  return l;\n}\n\nvar radialLine$1 = function() {\n  return radialLine(line().curve(curveRadialLinear));\n};\n\nvar radialArea = function() {\n  var a = area$1().curve(curveRadialLinear),\n      c = a.curve,\n      x0 = a.lineX0,\n      x1 = a.lineX1,\n      y0 = a.lineY0,\n      y1 = a.lineY1;\n\n  a.angle = a.x, delete a.x;\n  a.startAngle = a.x0, delete a.x0;\n  a.endAngle = a.x1, delete a.x1;\n  a.radius = a.y, delete a.y;\n  a.innerRadius = a.y0, delete a.y0;\n  a.outerRadius = a.y1, delete a.y1;\n  a.lineStartAngle = function() { return radialLine(x0()); }, delete a.lineX0;\n  a.lineEndAngle = function() { return radialLine(x1()); }, delete a.lineX1;\n  a.lineInnerRadius = function() { return radialLine(y0()); }, delete a.lineY0;\n  a.lineOuterRadius = function() { return radialLine(y1()); }, delete a.lineY1;\n\n  a.curve = function(_) {\n    return arguments.length ? c(curveRadial(_)) : c()._curve;\n  };\n\n  return a;\n};\n\nvar circle = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size / pi$2);\n    context.moveTo(r, 0);\n    context.arc(0, 0, r, 0, tau$2);\n  }\n};\n\nvar cross$1 = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size / 5) / 2;\n    context.moveTo(-3 * r, -r);\n    context.lineTo(-r, -r);\n    context.lineTo(-r, -3 * r);\n    context.lineTo(r, -3 * r);\n    context.lineTo(r, -r);\n    context.lineTo(3 * r, -r);\n    context.lineTo(3 * r, r);\n    context.lineTo(r, r);\n    context.lineTo(r, 3 * r);\n    context.lineTo(-r, 3 * r);\n    context.lineTo(-r, r);\n    context.lineTo(-3 * r, r);\n    context.closePath();\n  }\n};\n\nvar tan30 = Math.sqrt(1 / 3);\nvar tan30_2 = tan30 * 2;\n\nvar diamond = {\n  draw: function(context, size) {\n    var y = Math.sqrt(size / tan30_2),\n        x = y * tan30;\n    context.moveTo(0, -y);\n    context.lineTo(x, 0);\n    context.lineTo(0, y);\n    context.lineTo(-x, 0);\n    context.closePath();\n  }\n};\n\nvar ka = 0.89081309152928522810;\nvar kr = Math.sin(pi$2 / 10) / Math.sin(7 * pi$2 / 10);\nvar kx = Math.sin(tau$2 / 10) * kr;\nvar ky = -Math.cos(tau$2 / 10) * kr;\n\nvar star = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size * ka),\n        x = kx * r,\n        y = ky * r;\n    context.moveTo(0, -r);\n    context.lineTo(x, y);\n    for (var i = 1; i < 5; ++i) {\n      var a = tau$2 * i / 5,\n          c = Math.cos(a),\n          s = Math.sin(a);\n      context.lineTo(s * r, -c * r);\n      context.lineTo(c * x - s * y, s * x + c * y);\n    }\n    context.closePath();\n  }\n};\n\nvar square = {\n  draw: function(context, size) {\n    var w = Math.sqrt(size),\n        x = -w / 2;\n    context.rect(x, x, w, w);\n  }\n};\n\nvar sqrt3 = Math.sqrt(3);\n\nvar triangle = {\n  draw: function(context, size) {\n    var y = -Math.sqrt(size / (sqrt3 * 3));\n    context.moveTo(0, y * 2);\n    context.lineTo(-sqrt3 * y, -y);\n    context.lineTo(sqrt3 * y, -y);\n    context.closePath();\n  }\n};\n\nvar c = -0.5;\nvar s = Math.sqrt(3) / 2;\nvar k = 1 / Math.sqrt(12);\nvar a = (k / 2 + 1) * 3;\n\nvar wye = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size / a),\n        x0 = r / 2,\n        y0 = r * k,\n        x1 = x0,\n        y1 = r * k + r,\n        x2 = -x1,\n        y2 = y1;\n    context.moveTo(x0, y0);\n    context.lineTo(x1, y1);\n    context.lineTo(x2, y2);\n    context.lineTo(c * x0 - s * y0, s * x0 + c * y0);\n    context.lineTo(c * x1 - s * y1, s * x1 + c * y1);\n    context.lineTo(c * x2 - s * y2, s * x2 + c * y2);\n    context.lineTo(c * x0 + s * y0, c * y0 - s * x0);\n    context.lineTo(c * x1 + s * y1, c * y1 - s * x1);\n    context.lineTo(c * x2 + s * y2, c * y2 - s * x2);\n    context.closePath();\n  }\n};\n\nvar symbols = [\n  circle,\n  cross$1,\n  diamond,\n  square,\n  star,\n  triangle,\n  wye\n];\n\nvar symbol = function() {\n  var type = constant$2(circle),\n      size = constant$2(64),\n      context = null;\n\n  function symbol() {\n    var buffer;\n    if (!context) context = buffer = path();\n    type.apply(this, arguments).draw(context, +size.apply(this, arguments));\n    if (buffer) return context = null, buffer + \"\" || null;\n  }\n\n  symbol.type = function(_) {\n    return arguments.length ? (type = typeof _ === \"function\" ? _ : constant$2(_), symbol) : type;\n  };\n\n  symbol.size = function(_) {\n    return arguments.length ? (size = typeof _ === \"function\" ? _ : constant$2(+_), symbol) : size;\n  };\n\n  symbol.context = function(_) {\n    return arguments.length ? (context = _ == null ? null : _, symbol) : context;\n  };\n\n  return symbol;\n};\n\nvar noop = function() {};\n\nfunction point(that, x, y) {\n  that._context.bezierCurveTo(\n    (2 * that._x0 + that._x1) / 3,\n    (2 * that._y0 + that._y1) / 3,\n    (that._x0 + 2 * that._x1) / 3,\n    (that._y0 + 2 * that._y1) / 3,\n    (that._x0 + 4 * that._x1 + x) / 6,\n    (that._y0 + 4 * that._y1 + y) / 6\n  );\n}\n\nfunction Basis(context) {\n  this._context = context;\n}\n\nBasis.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 =\n    this._y0 = this._y1 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 3: point(this, this._x1, this._y1); // proceed\n      case 2: this._context.lineTo(this._x1, this._y1); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed\n      default: point(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n  }\n};\n\nvar basis = function(context) {\n  return new Basis(context);\n};\n\nfunction BasisClosed(context) {\n  this._context = context;\n}\n\nBasisClosed.prototype = {\n  areaStart: noop,\n  areaEnd: noop,\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =\n    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 1: {\n        this._context.moveTo(this._x2, this._y2);\n        this._context.closePath();\n        break;\n      }\n      case 2: {\n        this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);\n        this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);\n        this._context.closePath();\n        break;\n      }\n      case 3: {\n        this.point(this._x2, this._y2);\n        this.point(this._x3, this._y3);\n        this.point(this._x4, this._y4);\n        break;\n      }\n    }\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._x2 = x, this._y2 = y; break;\n      case 1: this._point = 2; this._x3 = x, this._y3 = y; break;\n      case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;\n      default: point(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n  }\n};\n\nvar basisClosed = function(context) {\n  return new BasisClosed(context);\n};\n\nfunction BasisOpen(context) {\n  this._context = context;\n}\n\nBasisOpen.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 =\n    this._y0 = this._y1 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;\n      case 3: this._point = 4; // proceed\n      default: point(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n  }\n};\n\nvar basisOpen = function(context) {\n  return new BasisOpen(context);\n};\n\nfunction Bundle(context, beta) {\n  this._basis = new Basis(context);\n  this._beta = beta;\n}\n\nBundle.prototype = {\n  lineStart: function() {\n    this._x = [];\n    this._y = [];\n    this._basis.lineStart();\n  },\n  lineEnd: function() {\n    var x = this._x,\n        y = this._y,\n        j = x.length - 1;\n\n    if (j > 0) {\n      var x0 = x[0],\n          y0 = y[0],\n          dx = x[j] - x0,\n          dy = y[j] - y0,\n          i = -1,\n          t;\n\n      while (++i <= j) {\n        t = i / j;\n        this._basis.point(\n          this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),\n          this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)\n        );\n      }\n    }\n\n    this._x = this._y = null;\n    this._basis.lineEnd();\n  },\n  point: function(x, y) {\n    this._x.push(+x);\n    this._y.push(+y);\n  }\n};\n\nvar bundle = (function custom(beta) {\n\n  function bundle(context) {\n    return beta === 1 ? new Basis(context) : new Bundle(context, beta);\n  }\n\n  bundle.beta = function(beta) {\n    return custom(+beta);\n  };\n\n  return bundle;\n})(0.85);\n\nfunction point$1(that, x, y) {\n  that._context.bezierCurveTo(\n    that._x1 + that._k * (that._x2 - that._x0),\n    that._y1 + that._k * (that._y2 - that._y0),\n    that._x2 + that._k * (that._x1 - x),\n    that._y2 + that._k * (that._y1 - y),\n    that._x2,\n    that._y2\n  );\n}\n\nfunction Cardinal(context, tension) {\n  this._context = context;\n  this._k = (1 - tension) / 6;\n}\n\nCardinal.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 2: this._context.lineTo(this._x2, this._y2); break;\n      case 3: point$1(this, this._x1, this._y1); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; this._x1 = x, this._y1 = y; break;\n      case 2: this._point = 3; // proceed\n      default: point$1(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar cardinal = (function custom(tension) {\n\n  function cardinal(context) {\n    return new Cardinal(context, tension);\n  }\n\n  cardinal.tension = function(tension) {\n    return custom(+tension);\n  };\n\n  return cardinal;\n})(0);\n\nfunction CardinalClosed(context, tension) {\n  this._context = context;\n  this._k = (1 - tension) / 6;\n}\n\nCardinalClosed.prototype = {\n  areaStart: noop,\n  areaEnd: noop,\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =\n    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 1: {\n        this._context.moveTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 2: {\n        this._context.lineTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 3: {\n        this.point(this._x3, this._y3);\n        this.point(this._x4, this._y4);\n        this.point(this._x5, this._y5);\n        break;\n      }\n    }\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;\n      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;\n      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;\n      default: point$1(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar cardinalClosed = (function custom(tension) {\n\n  function cardinal(context) {\n    return new CardinalClosed(context, tension);\n  }\n\n  cardinal.tension = function(tension) {\n    return custom(+tension);\n  };\n\n  return cardinal;\n})(0);\n\nfunction CardinalOpen(context, tension) {\n  this._context = context;\n  this._k = (1 - tension) / 6;\n}\n\nCardinalOpen.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;\n      case 3: this._point = 4; // proceed\n      default: point$1(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar cardinalOpen = (function custom(tension) {\n\n  function cardinal(context) {\n    return new CardinalOpen(context, tension);\n  }\n\n  cardinal.tension = function(tension) {\n    return custom(+tension);\n  };\n\n  return cardinal;\n})(0);\n\nfunction point$2(that, x, y) {\n  var x1 = that._x1,\n      y1 = that._y1,\n      x2 = that._x2,\n      y2 = that._y2;\n\n  if (that._l01_a > epsilon$1) {\n    var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,\n        n = 3 * that._l01_a * (that._l01_a + that._l12_a);\n    x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;\n    y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;\n  }\n\n  if (that._l23_a > epsilon$1) {\n    var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,\n        m = 3 * that._l23_a * (that._l23_a + that._l12_a);\n    x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;\n    y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;\n  }\n\n  that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);\n}\n\nfunction CatmullRom(context, alpha) {\n  this._context = context;\n  this._alpha = alpha;\n}\n\nCatmullRom.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._l01_a = this._l12_a = this._l23_a =\n    this._l01_2a = this._l12_2a = this._l23_2a =\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 2: this._context.lineTo(this._x2, this._y2); break;\n      case 3: this.point(this._x2, this._y2); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n\n    if (this._point) {\n      var x23 = this._x2 - x,\n          y23 = this._y2 - y;\n      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n    }\n\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; // proceed\n      default: point$2(this, x, y); break;\n    }\n\n    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar catmullRom = (function custom(alpha) {\n\n  function catmullRom(context) {\n    return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);\n  }\n\n  catmullRom.alpha = function(alpha) {\n    return custom(+alpha);\n  };\n\n  return catmullRom;\n})(0.5);\n\nfunction CatmullRomClosed(context, alpha) {\n  this._context = context;\n  this._alpha = alpha;\n}\n\nCatmullRomClosed.prototype = {\n  areaStart: noop,\n  areaEnd: noop,\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =\n    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;\n    this._l01_a = this._l12_a = this._l23_a =\n    this._l01_2a = this._l12_2a = this._l23_2a =\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 1: {\n        this._context.moveTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 2: {\n        this._context.lineTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 3: {\n        this.point(this._x3, this._y3);\n        this.point(this._x4, this._y4);\n        this.point(this._x5, this._y5);\n        break;\n      }\n    }\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n\n    if (this._point) {\n      var x23 = this._x2 - x,\n          y23 = this._y2 - y;\n      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n    }\n\n    switch (this._point) {\n      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;\n      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;\n      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;\n      default: point$2(this, x, y); break;\n    }\n\n    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar catmullRomClosed = (function custom(alpha) {\n\n  function catmullRom(context) {\n    return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);\n  }\n\n  catmullRom.alpha = function(alpha) {\n    return custom(+alpha);\n  };\n\n  return catmullRom;\n})(0.5);\n\nfunction CatmullRomOpen(context, alpha) {\n  this._context = context;\n  this._alpha = alpha;\n}\n\nCatmullRomOpen.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._l01_a = this._l12_a = this._l23_a =\n    this._l01_2a = this._l12_2a = this._l23_2a =\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n\n    if (this._point) {\n      var x23 = this._x2 - x,\n          y23 = this._y2 - y;\n      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n    }\n\n    switch (this._point) {\n      case 0: this._point = 1; break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;\n      case 3: this._point = 4; // proceed\n      default: point$2(this, x, y); break;\n    }\n\n    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar catmullRomOpen = (function custom(alpha) {\n\n  function catmullRom(context) {\n    return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);\n  }\n\n  catmullRom.alpha = function(alpha) {\n    return custom(+alpha);\n  };\n\n  return catmullRom;\n})(0.5);\n\nfunction LinearClosed(context) {\n  this._context = context;\n}\n\nLinearClosed.prototype = {\n  areaStart: noop,\n  areaEnd: noop,\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._point) this._context.closePath();\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    if (this._point) this._context.lineTo(x, y);\n    else this._point = 1, this._context.moveTo(x, y);\n  }\n};\n\nvar linearClosed = function(context) {\n  return new LinearClosed(context);\n};\n\nfunction sign(x) {\n  return x < 0 ? -1 : 1;\n}\n\n// Calculate the slopes of the tangents (Hermite-type interpolation) based on\n// the following paper: Steffen, M. 1990. A Simple Method for Monotonic\n// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.\n// NOV(II), P. 443, 1990.\nfunction slope3(that, x2, y2) {\n  var h0 = that._x1 - that._x0,\n      h1 = x2 - that._x1,\n      s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),\n      s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),\n      p = (s0 * h1 + s1 * h0) / (h0 + h1);\n  return (sign(s0) + sign(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;\n}\n\n// Calculate a one-sided slope.\nfunction slope2(that, t) {\n  var h = that._x1 - that._x0;\n  return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;\n}\n\n// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations\n// \"you can express cubic Hermite interpolation in terms of cubic Bézier curves\n// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1\".\nfunction point$3(that, t0, t1) {\n  var x0 = that._x0,\n      y0 = that._y0,\n      x1 = that._x1,\n      y1 = that._y1,\n      dx = (x1 - x0) / 3;\n  that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);\n}\n\nfunction MonotoneX(context) {\n  this._context = context;\n}\n\nMonotoneX.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 =\n    this._y0 = this._y1 =\n    this._t0 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 2: this._context.lineTo(this._x1, this._y1); break;\n      case 3: point$3(this, this._t0, slope2(this, this._t0)); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    var t1 = NaN;\n\n    x = +x, y = +y;\n    if (x === this._x1 && y === this._y1) return; // Ignore coincident points.\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; point$3(this, slope2(this, t1 = slope3(this, x, y)), t1); break;\n      default: point$3(this, this._t0, t1 = slope3(this, x, y)); break;\n    }\n\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n    this._t0 = t1;\n  }\n};\n\nfunction MonotoneY(context) {\n  this._context = new ReflectContext(context);\n}\n\n(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {\n  MonotoneX.prototype.point.call(this, y, x);\n};\n\nfunction ReflectContext(context) {\n  this._context = context;\n}\n\nReflectContext.prototype = {\n  moveTo: function(x, y) { this._context.moveTo(y, x); },\n  closePath: function() { this._context.closePath(); },\n  lineTo: function(x, y) { this._context.lineTo(y, x); },\n  bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }\n};\n\nfunction monotoneX(context) {\n  return new MonotoneX(context);\n}\n\nfunction monotoneY(context) {\n  return new MonotoneY(context);\n}\n\nfunction Natural(context) {\n  this._context = context;\n}\n\nNatural.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x = [];\n    this._y = [];\n  },\n  lineEnd: function() {\n    var x = this._x,\n        y = this._y,\n        n = x.length;\n\n    if (n) {\n      this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);\n      if (n === 2) {\n        this._context.lineTo(x[1], y[1]);\n      } else {\n        var px = controlPoints(x),\n            py = controlPoints(y);\n        for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {\n          this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);\n        }\n      }\n    }\n\n    if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n    this._x = this._y = null;\n  },\n  point: function(x, y) {\n    this._x.push(+x);\n    this._y.push(+y);\n  }\n};\n\n// See https://www.particleincell.com/2012/bezier-splines/ for derivation.\nfunction controlPoints(x) {\n  var i,\n      n = x.length - 1,\n      m,\n      a = new Array(n),\n      b = new Array(n),\n      r = new Array(n);\n  a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];\n  for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];\n  a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];\n  for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];\n  a[n - 1] = r[n - 1] / b[n - 1];\n  for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];\n  b[n - 1] = (x[n] + a[n - 1]) / 2;\n  for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];\n  return [a, b];\n}\n\nvar natural = function(context) {\n  return new Natural(context);\n};\n\nfunction Step(context, t) {\n  this._context = context;\n  this._t = t;\n}\n\nStep.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x = this._y = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; // proceed\n      default: {\n        if (this._t <= 0) {\n          this._context.lineTo(this._x, y);\n          this._context.lineTo(x, y);\n        } else {\n          var x1 = this._x * (1 - this._t) + x * this._t;\n          this._context.lineTo(x1, this._y);\n          this._context.lineTo(x1, y);\n        }\n        break;\n      }\n    }\n    this._x = x, this._y = y;\n  }\n};\n\nvar step = function(context) {\n  return new Step(context, 0.5);\n};\n\nfunction stepBefore(context) {\n  return new Step(context, 0);\n}\n\nfunction stepAfter(context) {\n  return new Step(context, 1);\n}\n\nvar slice$2 = Array.prototype.slice;\n\nvar none = function(series, order) {\n  if (!((n = series.length) > 1)) return;\n  for (var i = 1, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {\n    s0 = s1, s1 = series[order[i]];\n    for (var j = 0; j < m; ++j) {\n      s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];\n    }\n  }\n};\n\nvar none$1 = function(series) {\n  var n = series.length, o = new Array(n);\n  while (--n >= 0) o[n] = n;\n  return o;\n};\n\nfunction stackValue(d, key) {\n  return d[key];\n}\n\nvar stack = function() {\n  var keys = constant$2([]),\n      order = none$1,\n      offset = none,\n      value = stackValue;\n\n  function stack(data) {\n    var kz = keys.apply(this, arguments),\n        i,\n        m = data.length,\n        n = kz.length,\n        sz = new Array(n),\n        oz;\n\n    for (i = 0; i < n; ++i) {\n      for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {\n        si[j] = sij = [0, +value(data[j], ki, j, data)];\n        sij.data = data[j];\n      }\n      si.key = ki;\n    }\n\n    for (i = 0, oz = order(sz); i < n; ++i) {\n      sz[oz[i]].index = i;\n    }\n\n    offset(sz, oz);\n    return sz;\n  }\n\n  stack.keys = function(_) {\n    return arguments.length ? (keys = typeof _ === \"function\" ? _ : constant$2(slice$2.call(_)), stack) : keys;\n  };\n\n  stack.value = function(_) {\n    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant$2(+_), stack) : value;\n  };\n\n  stack.order = function(_) {\n    return arguments.length ? (order = _ == null ? none$1 : typeof _ === \"function\" ? _ : constant$2(slice$2.call(_)), stack) : order;\n  };\n\n  stack.offset = function(_) {\n    return arguments.length ? (offset = _ == null ? none : _, stack) : offset;\n  };\n\n  return stack;\n};\n\nvar expand = function(series, order) {\n  if (!((n = series.length) > 0)) return;\n  for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {\n    for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;\n    if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;\n  }\n  none(series, order);\n};\n\nvar silhouette = function(series, order) {\n  if (!((n = series.length) > 0)) return;\n  for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {\n    for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;\n    s0[j][1] += s0[j][0] = -y / 2;\n  }\n  none(series, order);\n};\n\nvar wiggle = function(series, order) {\n  if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;\n  for (var y = 0, j = 1, s0, m, n; j < m; ++j) {\n    for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {\n      var si = series[order[i]],\n          sij0 = si[j][1] || 0,\n          sij1 = si[j - 1][1] || 0,\n          s3 = (sij0 - sij1) / 2;\n      for (var k = 0; k < i; ++k) {\n        var sk = series[order[k]],\n            skj0 = sk[j][1] || 0,\n            skj1 = sk[j - 1][1] || 0;\n        s3 += skj0 - skj1;\n      }\n      s1 += sij0, s2 += s3 * sij0;\n    }\n    s0[j - 1][1] += s0[j - 1][0] = y;\n    if (s1) y -= s2 / s1;\n  }\n  s0[j - 1][1] += s0[j - 1][0] = y;\n  none(series, order);\n};\n\nvar ascending$1 = function(series) {\n  var sums = series.map(sum$1);\n  return none$1(series).sort(function(a, b) { return sums[a] - sums[b]; });\n};\n\nfunction sum$1(series) {\n  var s = 0, i = -1, n = series.length, v;\n  while (++i < n) if (v = +series[i][1]) s += v;\n  return s;\n}\n\nvar descending$2 = function(series) {\n  return ascending$1(series).reverse();\n};\n\nvar insideOut = function(series) {\n  var n = series.length,\n      i,\n      j,\n      sums = series.map(sum$1),\n      order = none$1(series).sort(function(a, b) { return sums[b] - sums[a]; }),\n      top = 0,\n      bottom = 0,\n      tops = [],\n      bottoms = [];\n\n  for (i = 0; i < n; ++i) {\n    j = order[i];\n    if (top < bottom) {\n      top += sums[j];\n      tops.push(j);\n    } else {\n      bottom += sums[j];\n      bottoms.push(j);\n    }\n  }\n\n  return bottoms.reverse().concat(tops);\n};\n\nvar reverse = function(series) {\n  return none$1(series).reverse();\n};\n\nvar define = function(constructor, factory, prototype) {\n  constructor.prototype = factory.prototype = prototype;\n  prototype.constructor = constructor;\n};\n\nfunction extend(parent, definition) {\n  var prototype = Object.create(parent.prototype);\n  for (var key in definition) prototype[key] = definition[key];\n  return prototype;\n}\n\nfunction Color() {}\n\nvar darker = 0.7;\nvar brighter = 1 / darker;\n\nvar reI = \"\\\\s*([+-]?\\\\d+)\\\\s*\";\nvar reN = \"\\\\s*([+-]?\\\\d*\\\\.?\\\\d+(?:[eE][+-]?\\\\d+)?)\\\\s*\";\nvar reP = \"\\\\s*([+-]?\\\\d*\\\\.?\\\\d+(?:[eE][+-]?\\\\d+)?)%\\\\s*\";\nvar reHex3 = /^#([0-9a-f]{3})$/;\nvar reHex6 = /^#([0-9a-f]{6})$/;\nvar reRgbInteger = new RegExp(\"^rgb\\\\(\" + [reI, reI, reI] + \"\\\\)$\");\nvar reRgbPercent = new RegExp(\"^rgb\\\\(\" + [reP, reP, reP] + \"\\\\)$\");\nvar reRgbaInteger = new RegExp(\"^rgba\\\\(\" + [reI, reI, reI, reN] + \"\\\\)$\");\nvar reRgbaPercent = new RegExp(\"^rgba\\\\(\" + [reP, reP, reP, reN] + \"\\\\)$\");\nvar reHslPercent = new RegExp(\"^hsl\\\\(\" + [reN, reP, reP] + \"\\\\)$\");\nvar reHslaPercent = new RegExp(\"^hsla\\\\(\" + [reN, reP, reP, reN] + \"\\\\)$\");\n\nvar named = {\n  aliceblue: 0xf0f8ff,\n  antiquewhite: 0xfaebd7,\n  aqua: 0x00ffff,\n  aquamarine: 0x7fffd4,\n  azure: 0xf0ffff,\n  beige: 0xf5f5dc,\n  bisque: 0xffe4c4,\n  black: 0x000000,\n  blanchedalmond: 0xffebcd,\n  blue: 0x0000ff,\n  blueviolet: 0x8a2be2,\n  brown: 0xa52a2a,\n  burlywood: 0xdeb887,\n  cadetblue: 0x5f9ea0,\n  chartreuse: 0x7fff00,\n  chocolate: 0xd2691e,\n  coral: 0xff7f50,\n  cornflowerblue: 0x6495ed,\n  cornsilk: 0xfff8dc,\n  crimson: 0xdc143c,\n  cyan: 0x00ffff,\n  darkblue: 0x00008b,\n  darkcyan: 0x008b8b,\n  darkgoldenrod: 0xb8860b,\n  darkgray: 0xa9a9a9,\n  darkgreen: 0x006400,\n  darkgrey: 0xa9a9a9,\n  darkkhaki: 0xbdb76b,\n  darkmagenta: 0x8b008b,\n  darkolivegreen: 0x556b2f,\n  darkorange: 0xff8c00,\n  darkorchid: 0x9932cc,\n  darkred: 0x8b0000,\n  darksalmon: 0xe9967a,\n  darkseagreen: 0x8fbc8f,\n  darkslateblue: 0x483d8b,\n  darkslategray: 0x2f4f4f,\n  darkslategrey: 0x2f4f4f,\n  darkturquoise: 0x00ced1,\n  darkviolet: 0x9400d3,\n  deeppink: 0xff1493,\n  deepskyblue: 0x00bfff,\n  dimgray: 0x696969,\n  dimgrey: 0x696969,\n  dodgerblue: 0x1e90ff,\n  firebrick: 0xb22222,\n  floralwhite: 0xfffaf0,\n  forestgreen: 0x228b22,\n  fuchsia: 0xff00ff,\n  gainsboro: 0xdcdcdc,\n  ghostwhite: 0xf8f8ff,\n  gold: 0xffd700,\n  goldenrod: 0xdaa520,\n  gray: 0x808080,\n  green: 0x008000,\n  greenyellow: 0xadff2f,\n  grey: 0x808080,\n  honeydew: 0xf0fff0,\n  hotpink: 0xff69b4,\n  indianred: 0xcd5c5c,\n  indigo: 0x4b0082,\n  ivory: 0xfffff0,\n  khaki: 0xf0e68c,\n  lavender: 0xe6e6fa,\n  lavenderblush: 0xfff0f5,\n  lawngreen: 0x7cfc00,\n  lemonchiffon: 0xfffacd,\n  lightblue: 0xadd8e6,\n  lightcoral: 0xf08080,\n  lightcyan: 0xe0ffff,\n  lightgoldenrodyellow: 0xfafad2,\n  lightgray: 0xd3d3d3,\n  lightgreen: 0x90ee90,\n  lightgrey: 0xd3d3d3,\n  lightpink: 0xffb6c1,\n  lightsalmon: 0xffa07a,\n  lightseagreen: 0x20b2aa,\n  lightskyblue: 0x87cefa,\n  lightslategray: 0x778899,\n  lightslategrey: 0x778899,\n  lightsteelblue: 0xb0c4de,\n  lightyellow: 0xffffe0,\n  lime: 0x00ff00,\n  limegreen: 0x32cd32,\n  linen: 0xfaf0e6,\n  magenta: 0xff00ff,\n  maroon: 0x800000,\n  mediumaquamarine: 0x66cdaa,\n  mediumblue: 0x0000cd,\n  mediumorchid: 0xba55d3,\n  mediumpurple: 0x9370db,\n  mediumseagreen: 0x3cb371,\n  mediumslateblue: 0x7b68ee,\n  mediumspringgreen: 0x00fa9a,\n  mediumturquoise: 0x48d1cc,\n  mediumvioletred: 0xc71585,\n  midnightblue: 0x191970,\n  mintcream: 0xf5fffa,\n  mistyrose: 0xffe4e1,\n  moccasin: 0xffe4b5,\n  navajowhite: 0xffdead,\n  navy: 0x000080,\n  oldlace: 0xfdf5e6,\n  olive: 0x808000,\n  olivedrab: 0x6b8e23,\n  orange: 0xffa500,\n  orangered: 0xff4500,\n  orchid: 0xda70d6,\n  palegoldenrod: 0xeee8aa,\n  palegreen: 0x98fb98,\n  paleturquoise: 0xafeeee,\n  palevioletred: 0xdb7093,\n  papayawhip: 0xffefd5,\n  peachpuff: 0xffdab9,\n  peru: 0xcd853f,\n  pink: 0xffc0cb,\n  plum: 0xdda0dd,\n  powderblue: 0xb0e0e6,\n  purple: 0x800080,\n  rebeccapurple: 0x663399,\n  red: 0xff0000,\n  rosybrown: 0xbc8f8f,\n  royalblue: 0x4169e1,\n  saddlebrown: 0x8b4513,\n  salmon: 0xfa8072,\n  sandybrown: 0xf4a460,\n  seagreen: 0x2e8b57,\n  seashell: 0xfff5ee,\n  sienna: 0xa0522d,\n  silver: 0xc0c0c0,\n  skyblue: 0x87ceeb,\n  slateblue: 0x6a5acd,\n  slategray: 0x708090,\n  slategrey: 0x708090,\n  snow: 0xfffafa,\n  springgreen: 0x00ff7f,\n  steelblue: 0x4682b4,\n  tan: 0xd2b48c,\n  teal: 0x008080,\n  thistle: 0xd8bfd8,\n  tomato: 0xff6347,\n  turquoise: 0x40e0d0,\n  violet: 0xee82ee,\n  wheat: 0xf5deb3,\n  white: 0xffffff,\n  whitesmoke: 0xf5f5f5,\n  yellow: 0xffff00,\n  yellowgreen: 0x9acd32\n};\n\ndefine(Color, color, {\n  displayable: function() {\n    return this.rgb().displayable();\n  },\n  toString: function() {\n    return this.rgb() + \"\";\n  }\n});\n\nfunction color(format) {\n  var m;\n  format = (format + \"\").trim().toLowerCase();\n  return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00\n      : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000\n      : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)\n      : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)\n      : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)\n      : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)\n      : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)\n      : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)\n      : named.hasOwnProperty(format) ? rgbn(named[format])\n      : format === \"transparent\" ? new Rgb(NaN, NaN, NaN, 0)\n      : null;\n}\n\nfunction rgbn(n) {\n  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);\n}\n\nfunction rgba(r, g, b, a) {\n  if (a <= 0) r = g = b = NaN;\n  return new Rgb(r, g, b, a);\n}\n\nfunction rgbConvert(o) {\n  if (!(o instanceof Color)) o = color(o);\n  if (!o) return new Rgb;\n  o = o.rgb();\n  return new Rgb(o.r, o.g, o.b, o.opacity);\n}\n\nfunction rgb(r, g, b, opacity) {\n  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);\n}\n\nfunction Rgb(r, g, b, opacity) {\n  this.r = +r;\n  this.g = +g;\n  this.b = +b;\n  this.opacity = +opacity;\n}\n\ndefine(Rgb, rgb, extend(Color, {\n  brighter: function(k) {\n    k = k == null ? brighter : Math.pow(brighter, k);\n    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);\n  },\n  darker: function(k) {\n    k = k == null ? darker : Math.pow(darker, k);\n    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);\n  },\n  rgb: function() {\n    return this;\n  },\n  displayable: function() {\n    return (0 <= this.r && this.r <= 255)\n        && (0 <= this.g && this.g <= 255)\n        && (0 <= this.b && this.b <= 255)\n        && (0 <= this.opacity && this.opacity <= 1);\n  },\n  toString: function() {\n    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));\n    return (a === 1 ? \"rgb(\" : \"rgba(\")\n        + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + \", \"\n        + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + \", \"\n        + Math.max(0, Math.min(255, Math.round(this.b) || 0))\n        + (a === 1 ? \")\" : \", \" + a + \")\");\n  }\n}));\n\nfunction hsla(h, s, l, a) {\n  if (a <= 0) h = s = l = NaN;\n  else if (l <= 0 || l >= 1) h = s = NaN;\n  else if (s <= 0) h = NaN;\n  return new Hsl(h, s, l, a);\n}\n\nfunction hslConvert(o) {\n  if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);\n  if (!(o instanceof Color)) o = color(o);\n  if (!o) return new Hsl;\n  if (o instanceof Hsl) return o;\n  o = o.rgb();\n  var r = o.r / 255,\n      g = o.g / 255,\n      b = o.b / 255,\n      min = Math.min(r, g, b),\n      max = Math.max(r, g, b),\n      h = NaN,\n      s = max - min,\n      l = (max + min) / 2;\n  if (s) {\n    if (r === max) h = (g - b) / s + (g < b) * 6;\n    else if (g === max) h = (b - r) / s + 2;\n    else h = (r - g) / s + 4;\n    s /= l < 0.5 ? max + min : 2 - max - min;\n    h *= 60;\n  } else {\n    s = l > 0 && l < 1 ? 0 : h;\n  }\n  return new Hsl(h, s, l, o.opacity);\n}\n\nfunction hsl(h, s, l, opacity) {\n  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);\n}\n\nfunction Hsl(h, s, l, opacity) {\n  this.h = +h;\n  this.s = +s;\n  this.l = +l;\n  this.opacity = +opacity;\n}\n\ndefine(Hsl, hsl, extend(Color, {\n  brighter: function(k) {\n    k = k == null ? brighter : Math.pow(brighter, k);\n    return new Hsl(this.h, this.s, this.l * k, this.opacity);\n  },\n  darker: function(k) {\n    k = k == null ? darker : Math.pow(darker, k);\n    return new Hsl(this.h, this.s, this.l * k, this.opacity);\n  },\n  rgb: function() {\n    var h = this.h % 360 + (this.h < 0) * 360,\n        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,\n        l = this.l,\n        m2 = l + (l < 0.5 ? l : 1 - l) * s,\n        m1 = 2 * l - m2;\n    return new Rgb(\n      hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),\n      hsl2rgb(h, m1, m2),\n      hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),\n      this.opacity\n    );\n  },\n  displayable: function() {\n    return (0 <= this.s && this.s <= 1 || isNaN(this.s))\n        && (0 <= this.l && this.l <= 1)\n        && (0 <= this.opacity && this.opacity <= 1);\n  }\n}));\n\n/* From FvD 13.37, CSS Color Module Level 3 */\nfunction hsl2rgb(h, m1, m2) {\n  return (h < 60 ? m1 + (m2 - m1) * h / 60\n      : h < 180 ? m2\n      : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60\n      : m1) * 255;\n}\n\nvar deg2rad = Math.PI / 180;\nvar rad2deg = 180 / Math.PI;\n\nvar Kn = 18;\nvar Xn = 0.950470;\nvar Yn = 1;\nvar Zn = 1.088830;\nvar t0 = 4 / 29;\nvar t1 = 6 / 29;\nvar t2 = 3 * t1 * t1;\nvar t3 = t1 * t1 * t1;\n\nfunction labConvert(o) {\n  if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);\n  if (o instanceof Hcl) {\n    var h = o.h * deg2rad;\n    return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);\n  }\n  if (!(o instanceof Rgb)) o = rgbConvert(o);\n  var b = rgb2xyz(o.r),\n      a = rgb2xyz(o.g),\n      l = rgb2xyz(o.b),\n      x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn),\n      y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn),\n      z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn);\n  return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);\n}\n\nfunction lab(l, a, b, opacity) {\n  return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);\n}\n\nfunction Lab(l, a, b, opacity) {\n  this.l = +l;\n  this.a = +a;\n  this.b = +b;\n  this.opacity = +opacity;\n}\n\ndefine(Lab, lab, extend(Color, {\n  brighter: function(k) {\n    return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);\n  },\n  darker: function(k) {\n    return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);\n  },\n  rgb: function() {\n    var y = (this.l + 16) / 116,\n        x = isNaN(this.a) ? y : y + this.a / 500,\n        z = isNaN(this.b) ? y : y - this.b / 200;\n    y = Yn * lab2xyz(y);\n    x = Xn * lab2xyz(x);\n    z = Zn * lab2xyz(z);\n    return new Rgb(\n      xyz2rgb( 3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB\n      xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z),\n      xyz2rgb( 0.0556434 * x - 0.2040259 * y + 1.0572252 * z),\n      this.opacity\n    );\n  }\n}));\n\nfunction xyz2lab(t) {\n  return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;\n}\n\nfunction lab2xyz(t) {\n  return t > t1 ? t * t * t : t2 * (t - t0);\n}\n\nfunction xyz2rgb(x) {\n  return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);\n}\n\nfunction rgb2xyz(x) {\n  return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);\n}\n\nfunction hclConvert(o) {\n  if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);\n  if (!(o instanceof Lab)) o = labConvert(o);\n  var h = Math.atan2(o.b, o.a) * rad2deg;\n  return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);\n}\n\nfunction hcl(h, c, l, opacity) {\n  return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);\n}\n\nfunction Hcl(h, c, l, opacity) {\n  this.h = +h;\n  this.c = +c;\n  this.l = +l;\n  this.opacity = +opacity;\n}\n\ndefine(Hcl, hcl, extend(Color, {\n  brighter: function(k) {\n    return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity);\n  },\n  darker: function(k) {\n    return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity);\n  },\n  rgb: function() {\n    return labConvert(this).rgb();\n  }\n}));\n\nvar A = -0.14861;\nvar B = +1.78277;\nvar C = -0.29227;\nvar D = -0.90649;\nvar E = +1.97294;\nvar ED = E * D;\nvar EB = E * B;\nvar BC_DA = B * C - D * A;\n\nfunction cubehelixConvert(o) {\n  if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);\n  if (!(o instanceof Rgb)) o = rgbConvert(o);\n  var r = o.r / 255,\n      g = o.g / 255,\n      b = o.b / 255,\n      l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),\n      bl = b - l,\n      k = (E * (g - l) - C * bl) / D,\n      s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1\n      h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;\n  return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);\n}\n\nfunction cubehelix(h, s, l, opacity) {\n  return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);\n}\n\nfunction Cubehelix(h, s, l, opacity) {\n  this.h = +h;\n  this.s = +s;\n  this.l = +l;\n  this.opacity = +opacity;\n}\n\ndefine(Cubehelix, cubehelix, extend(Color, {\n  brighter: function(k) {\n    k = k == null ? brighter : Math.pow(brighter, k);\n    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);\n  },\n  darker: function(k) {\n    k = k == null ? darker : Math.pow(darker, k);\n    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);\n  },\n  rgb: function() {\n    var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,\n        l = +this.l,\n        a = isNaN(this.s) ? 0 : this.s * l * (1 - l),\n        cosh = Math.cos(h),\n        sinh = Math.sin(h);\n    return new Rgb(\n      255 * (l + a * (A * cosh + B * sinh)),\n      255 * (l + a * (C * cosh + D * sinh)),\n      255 * (l + a * (E * cosh)),\n      this.opacity\n    );\n  }\n}));\n\nfunction basis$1(t1, v0, v1, v2, v3) {\n  var t2 = t1 * t1, t3 = t2 * t1;\n  return ((1 - 3 * t1 + 3 * t2 - t3) * v0\n      + (4 - 6 * t2 + 3 * t3) * v1\n      + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2\n      + t3 * v3) / 6;\n}\n\nvar basis$2 = function(values) {\n  var n = values.length - 1;\n  return function(t) {\n    var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),\n        v1 = values[i],\n        v2 = values[i + 1],\n        v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,\n        v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;\n    return basis$1((t - i / n) * n, v0, v1, v2, v3);\n  };\n};\n\nvar basisClosed$1 = function(values) {\n  var n = values.length;\n  return function(t) {\n    var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),\n        v0 = values[(i + n - 1) % n],\n        v1 = values[i % n],\n        v2 = values[(i + 1) % n],\n        v3 = values[(i + 2) % n];\n    return basis$1((t - i / n) * n, v0, v1, v2, v3);\n  };\n};\n\nvar constant$3 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nfunction linear$1(a, d) {\n  return function(t) {\n    return a + t * d;\n  };\n}\n\nfunction exponential$1(a, b, y) {\n  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {\n    return Math.pow(a + t * b, y);\n  };\n}\n\nfunction hue(a, b) {\n  var d = b - a;\n  return d ? linear$1(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$3(isNaN(a) ? b : a);\n}\n\nfunction gamma(y) {\n  return (y = +y) === 1 ? nogamma : function(a, b) {\n    return b - a ? exponential$1(a, b, y) : constant$3(isNaN(a) ? b : a);\n  };\n}\n\nfunction nogamma(a, b) {\n  var d = b - a;\n  return d ? linear$1(a, d) : constant$3(isNaN(a) ? b : a);\n}\n\nvar interpolateRgb = (function rgbGamma(y) {\n  var color$$1 = gamma(y);\n\n  function rgb$$1(start, end) {\n    var r = color$$1((start = rgb(start)).r, (end = rgb(end)).r),\n        g = color$$1(start.g, end.g),\n        b = color$$1(start.b, end.b),\n        opacity = color$$1(start.opacity, end.opacity);\n    return function(t) {\n      start.r = r(t);\n      start.g = g(t);\n      start.b = b(t);\n      start.opacity = opacity(t);\n      return start + \"\";\n    };\n  }\n\n  rgb$$1.gamma = rgbGamma;\n\n  return rgb$$1;\n})(1);\n\nfunction rgbSpline(spline) {\n  return function(colors) {\n    var n = colors.length,\n        r = new Array(n),\n        g = new Array(n),\n        b = new Array(n),\n        i, color$$1;\n    for (i = 0; i < n; ++i) {\n      color$$1 = rgb(colors[i]);\n      r[i] = color$$1.r || 0;\n      g[i] = color$$1.g || 0;\n      b[i] = color$$1.b || 0;\n    }\n    r = spline(r);\n    g = spline(g);\n    b = spline(b);\n    color$$1.opacity = 1;\n    return function(t) {\n      color$$1.r = r(t);\n      color$$1.g = g(t);\n      color$$1.b = b(t);\n      return color$$1 + \"\";\n    };\n  };\n}\n\nvar rgbBasis = rgbSpline(basis$2);\nvar rgbBasisClosed = rgbSpline(basisClosed$1);\n\nvar array$1 = function(a, b) {\n  var nb = b ? b.length : 0,\n      na = a ? Math.min(nb, a.length) : 0,\n      x = new Array(nb),\n      c = new Array(nb),\n      i;\n\n  for (i = 0; i < na; ++i) x[i] = interpolate(a[i], b[i]);\n  for (; i < nb; ++i) c[i] = b[i];\n\n  return function(t) {\n    for (i = 0; i < na; ++i) c[i] = x[i](t);\n    return c;\n  };\n};\n\nvar date = function(a, b) {\n  var d = new Date;\n  return a = +a, b -= a, function(t) {\n    return d.setTime(a + b * t), d;\n  };\n};\n\nvar interpolateNumber = function(a, b) {\n  return a = +a, b -= a, function(t) {\n    return a + b * t;\n  };\n};\n\nvar object = function(a, b) {\n  var i = {},\n      c = {},\n      k;\n\n  if (a === null || typeof a !== \"object\") a = {};\n  if (b === null || typeof b !== \"object\") b = {};\n\n  for (k in b) {\n    if (k in a) {\n      i[k] = interpolate(a[k], b[k]);\n    } else {\n      c[k] = b[k];\n    }\n  }\n\n  return function(t) {\n    for (k in i) c[k] = i[k](t);\n    return c;\n  };\n};\n\nvar reA = /[-+]?(?:\\d+\\.?\\d*|\\.?\\d+)(?:[eE][-+]?\\d+)?/g;\nvar reB = new RegExp(reA.source, \"g\");\n\nfunction zero(b) {\n  return function() {\n    return b;\n  };\n}\n\nfunction one(b) {\n  return function(t) {\n    return b(t) + \"\";\n  };\n}\n\nvar interpolateString = function(a, b) {\n  var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b\n      am, // current match in a\n      bm, // current match in b\n      bs, // string preceding current number in b, if any\n      i = -1, // index in s\n      s = [], // string constants and placeholders\n      q = []; // number interpolators\n\n  // Coerce inputs to strings.\n  a = a + \"\", b = b + \"\";\n\n  // Interpolate pairs of numbers in a & b.\n  while ((am = reA.exec(a))\n      && (bm = reB.exec(b))) {\n    if ((bs = bm.index) > bi) { // a string precedes the next number in b\n      bs = b.slice(bi, bs);\n      if (s[i]) s[i] += bs; // coalesce with previous string\n      else s[++i] = bs;\n    }\n    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match\n      if (s[i]) s[i] += bm; // coalesce with previous string\n      else s[++i] = bm;\n    } else { // interpolate non-matching numbers\n      s[++i] = null;\n      q.push({i: i, x: interpolateNumber(am, bm)});\n    }\n    bi = reB.lastIndex;\n  }\n\n  // Add remains of b.\n  if (bi < b.length) {\n    bs = b.slice(bi);\n    if (s[i]) s[i] += bs; // coalesce with previous string\n    else s[++i] = bs;\n  }\n\n  // Special optimization for only a single match.\n  // Otherwise, interpolate each of the numbers and rejoin the string.\n  return s.length < 2 ? (q[0]\n      ? one(q[0].x)\n      : zero(b))\n      : (b = q.length, function(t) {\n          for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);\n          return s.join(\"\");\n        });\n};\n\nvar interpolate = function(a, b) {\n  var t = typeof b, c;\n  return b == null || t === \"boolean\" ? constant$3(b)\n      : (t === \"number\" ? interpolateNumber\n      : t === \"string\" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString)\n      : b instanceof color ? interpolateRgb\n      : b instanceof Date ? date\n      : Array.isArray(b) ? array$1\n      : isNaN(b) ? object\n      : interpolateNumber)(a, b);\n};\n\nvar interpolateRound = function(a, b) {\n  return a = +a, b -= a, function(t) {\n    return Math.round(a + b * t);\n  };\n};\n\nvar degrees = 180 / Math.PI;\n\nvar identity$2 = {\n  translateX: 0,\n  translateY: 0,\n  rotate: 0,\n  skewX: 0,\n  scaleX: 1,\n  scaleY: 1\n};\n\nvar decompose = function(a, b, c, d, e, f) {\n  var scaleX, scaleY, skewX;\n  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;\n  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;\n  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;\n  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;\n  return {\n    translateX: e,\n    translateY: f,\n    rotate: Math.atan2(b, a) * degrees,\n    skewX: Math.atan(skewX) * degrees,\n    scaleX: scaleX,\n    scaleY: scaleY\n  };\n};\n\nvar cssNode;\nvar cssRoot;\nvar cssView;\nvar svgNode;\n\nfunction parseCss(value) {\n  if (value === \"none\") return identity$2;\n  if (!cssNode) cssNode = document.createElement(\"DIV\"), cssRoot = document.documentElement, cssView = document.defaultView;\n  cssNode.style.transform = value;\n  value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue(\"transform\");\n  cssRoot.removeChild(cssNode);\n  value = value.slice(7, -1).split(\",\");\n  return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);\n}\n\nfunction parseSvg(value) {\n  if (value == null) return identity$2;\n  if (!svgNode) svgNode = document.createElementNS(\"http://www.w3.org/2000/svg\", \"g\");\n  svgNode.setAttribute(\"transform\", value);\n  if (!(value = svgNode.transform.baseVal.consolidate())) return identity$2;\n  value = value.matrix;\n  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);\n}\n\nfunction interpolateTransform(parse, pxComma, pxParen, degParen) {\n\n  function pop(s) {\n    return s.length ? s.pop() + \" \" : \"\";\n  }\n\n  function translate(xa, ya, xb, yb, s, q) {\n    if (xa !== xb || ya !== yb) {\n      var i = s.push(\"translate(\", null, pxComma, null, pxParen);\n      q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});\n    } else if (xb || yb) {\n      s.push(\"translate(\" + xb + pxComma + yb + pxParen);\n    }\n  }\n\n  function rotate(a, b, s, q) {\n    if (a !== b) {\n      if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path\n      q.push({i: s.push(pop(s) + \"rotate(\", null, degParen) - 2, x: interpolateNumber(a, b)});\n    } else if (b) {\n      s.push(pop(s) + \"rotate(\" + b + degParen);\n    }\n  }\n\n  function skewX(a, b, s, q) {\n    if (a !== b) {\n      q.push({i: s.push(pop(s) + \"skewX(\", null, degParen) - 2, x: interpolateNumber(a, b)});\n    } else if (b) {\n      s.push(pop(s) + \"skewX(\" + b + degParen);\n    }\n  }\n\n  function scale(xa, ya, xb, yb, s, q) {\n    if (xa !== xb || ya !== yb) {\n      var i = s.push(pop(s) + \"scale(\", null, \",\", null, \")\");\n      q.push({i: i - 4, x: interpolateNumber(xa, xb)}, {i: i - 2, x: interpolateNumber(ya, yb)});\n    } else if (xb !== 1 || yb !== 1) {\n      s.push(pop(s) + \"scale(\" + xb + \",\" + yb + \")\");\n    }\n  }\n\n  return function(a, b) {\n    var s = [], // string constants and placeholders\n        q = []; // number interpolators\n    a = parse(a), b = parse(b);\n    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);\n    rotate(a.rotate, b.rotate, s, q);\n    skewX(a.skewX, b.skewX, s, q);\n    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);\n    a = b = null; // gc\n    return function(t) {\n      var i = -1, n = q.length, o;\n      while (++i < n) s[(o = q[i]).i] = o.x(t);\n      return s.join(\"\");\n    };\n  };\n}\n\nvar interpolateTransformCss = interpolateTransform(parseCss, \"px, \", \"px)\", \"deg)\");\nvar interpolateTransformSvg = interpolateTransform(parseSvg, \", \", \")\", \")\");\n\nvar rho = Math.SQRT2;\nvar rho2 = 2;\nvar rho4 = 4;\nvar epsilon2 = 1e-12;\n\nfunction cosh(x) {\n  return ((x = Math.exp(x)) + 1 / x) / 2;\n}\n\nfunction sinh(x) {\n  return ((x = Math.exp(x)) - 1 / x) / 2;\n}\n\nfunction tanh(x) {\n  return ((x = Math.exp(2 * x)) - 1) / (x + 1);\n}\n\n// p0 = [ux0, uy0, w0]\n// p1 = [ux1, uy1, w1]\nvar interpolateZoom = function(p0, p1) {\n  var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],\n      ux1 = p1[0], uy1 = p1[1], w1 = p1[2],\n      dx = ux1 - ux0,\n      dy = uy1 - uy0,\n      d2 = dx * dx + dy * dy,\n      i,\n      S;\n\n  // Special case for u0 ≅ u1.\n  if (d2 < epsilon2) {\n    S = Math.log(w1 / w0) / rho;\n    i = function(t) {\n      return [\n        ux0 + t * dx,\n        uy0 + t * dy,\n        w0 * Math.exp(rho * t * S)\n      ];\n    };\n  }\n\n  // General case.\n  else {\n    var d1 = Math.sqrt(d2),\n        b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),\n        b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),\n        r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),\n        r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);\n    S = (r1 - r0) / rho;\n    i = function(t) {\n      var s = t * S,\n          coshr0 = cosh(r0),\n          u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));\n      return [\n        ux0 + u * dx,\n        uy0 + u * dy,\n        w0 * coshr0 / cosh(rho * s + r0)\n      ];\n    };\n  }\n\n  i.duration = S * 1000;\n\n  return i;\n};\n\nfunction hsl$1(hue$$1) {\n  return function(start, end) {\n    var h = hue$$1((start = hsl(start)).h, (end = hsl(end)).h),\n        s = nogamma(start.s, end.s),\n        l = nogamma(start.l, end.l),\n        opacity = nogamma(start.opacity, end.opacity);\n    return function(t) {\n      start.h = h(t);\n      start.s = s(t);\n      start.l = l(t);\n      start.opacity = opacity(t);\n      return start + \"\";\n    };\n  }\n}\n\nvar hsl$2 = hsl$1(hue);\nvar hslLong = hsl$1(nogamma);\n\nfunction lab$1(start, end) {\n  var l = nogamma((start = lab(start)).l, (end = lab(end)).l),\n      a = nogamma(start.a, end.a),\n      b = nogamma(start.b, end.b),\n      opacity = nogamma(start.opacity, end.opacity);\n  return function(t) {\n    start.l = l(t);\n    start.a = a(t);\n    start.b = b(t);\n    start.opacity = opacity(t);\n    return start + \"\";\n  };\n}\n\nfunction hcl$1(hue$$1) {\n  return function(start, end) {\n    var h = hue$$1((start = hcl(start)).h, (end = hcl(end)).h),\n        c = nogamma(start.c, end.c),\n        l = nogamma(start.l, end.l),\n        opacity = nogamma(start.opacity, end.opacity);\n    return function(t) {\n      start.h = h(t);\n      start.c = c(t);\n      start.l = l(t);\n      start.opacity = opacity(t);\n      return start + \"\";\n    };\n  }\n}\n\nvar hcl$2 = hcl$1(hue);\nvar hclLong = hcl$1(nogamma);\n\nfunction cubehelix$1(hue$$1) {\n  return (function cubehelixGamma(y) {\n    y = +y;\n\n    function cubehelix$$1(start, end) {\n      var h = hue$$1((start = cubehelix(start)).h, (end = cubehelix(end)).h),\n          s = nogamma(start.s, end.s),\n          l = nogamma(start.l, end.l),\n          opacity = nogamma(start.opacity, end.opacity);\n      return function(t) {\n        start.h = h(t);\n        start.s = s(t);\n        start.l = l(Math.pow(t, y));\n        start.opacity = opacity(t);\n        return start + \"\";\n      };\n    }\n\n    cubehelix$$1.gamma = cubehelixGamma;\n\n    return cubehelix$$1;\n  })(1);\n}\n\nvar cubehelix$2 = cubehelix$1(hue);\nvar cubehelixLong = cubehelix$1(nogamma);\n\nvar quantize = function(interpolator, n) {\n  var samples = new Array(n);\n  for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));\n  return samples;\n};\n\nvar noop$1 = {value: function() {}};\n\nfunction dispatch() {\n  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {\n    if (!(t = arguments[i] + \"\") || (t in _)) throw new Error(\"illegal type: \" + t);\n    _[t] = [];\n  }\n  return new Dispatch(_);\n}\n\nfunction Dispatch(_) {\n  this._ = _;\n}\n\nfunction parseTypenames(typenames, types) {\n  return typenames.trim().split(/^|\\s+/).map(function(t) {\n    var name = \"\", i = t.indexOf(\".\");\n    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);\n    if (t && !types.hasOwnProperty(t)) throw new Error(\"unknown type: \" + t);\n    return {type: t, name: name};\n  });\n}\n\nDispatch.prototype = dispatch.prototype = {\n  constructor: Dispatch,\n  on: function(typename, callback) {\n    var _ = this._,\n        T = parseTypenames(typename + \"\", _),\n        t,\n        i = -1,\n        n = T.length;\n\n    // If no callback was specified, return the callback of the given type and name.\n    if (arguments.length < 2) {\n      while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;\n      return;\n    }\n\n    // If a type was specified, set the callback for the given type and name.\n    // Otherwise, if a null callback was specified, remove callbacks of the given name.\n    if (callback != null && typeof callback !== \"function\") throw new Error(\"invalid callback: \" + callback);\n    while (++i < n) {\n      if (t = (typename = T[i]).type) _[t] = set$2(_[t], typename.name, callback);\n      else if (callback == null) for (t in _) _[t] = set$2(_[t], typename.name, null);\n    }\n\n    return this;\n  },\n  copy: function() {\n    var copy = {}, _ = this._;\n    for (var t in _) copy[t] = _[t].slice();\n    return new Dispatch(copy);\n  },\n  call: function(type, that) {\n    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];\n    if (!this._.hasOwnProperty(type)) throw new Error(\"unknown type: \" + type);\n    for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);\n  },\n  apply: function(type, that, args) {\n    if (!this._.hasOwnProperty(type)) throw new Error(\"unknown type: \" + type);\n    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);\n  }\n};\n\nfunction get(type, name) {\n  for (var i = 0, n = type.length, c; i < n; ++i) {\n    if ((c = type[i]).name === name) {\n      return c.value;\n    }\n  }\n}\n\nfunction set$2(type, name, callback) {\n  for (var i = 0, n = type.length; i < n; ++i) {\n    if (type[i].name === name) {\n      type[i] = noop$1, type = type.slice(0, i).concat(type.slice(i + 1));\n      break;\n    }\n  }\n  if (callback != null) type.push({name: name, value: callback});\n  return type;\n}\n\nfunction objectConverter(columns) {\n  return new Function(\"d\", \"return {\" + columns.map(function(name, i) {\n    return JSON.stringify(name) + \": d[\" + i + \"]\";\n  }).join(\",\") + \"}\");\n}\n\nfunction customConverter(columns, f) {\n  var object = objectConverter(columns);\n  return function(row, i) {\n    return f(object(row), i, columns);\n  };\n}\n\n// Compute unique columns in order of discovery.\nfunction inferColumns(rows) {\n  var columnSet = Object.create(null),\n      columns = [];\n\n  rows.forEach(function(row) {\n    for (var column in row) {\n      if (!(column in columnSet)) {\n        columns.push(columnSet[column] = column);\n      }\n    }\n  });\n\n  return columns;\n}\n\nvar dsv = function(delimiter) {\n  var reFormat = new RegExp(\"[\\\"\" + delimiter + \"\\n]\"),\n      delimiterCode = delimiter.charCodeAt(0);\n\n  function parse(text, f) {\n    var convert, columns, rows = parseRows(text, function(row, i) {\n      if (convert) return convert(row, i - 1);\n      columns = row, convert = f ? customConverter(row, f) : objectConverter(row);\n    });\n    rows.columns = columns;\n    return rows;\n  }\n\n  function parseRows(text, f) {\n    var EOL = {}, // sentinel value for end-of-line\n        EOF = {}, // sentinel value for end-of-file\n        rows = [], // output rows\n        N = text.length,\n        I = 0, // current character index\n        n = 0, // the current line number\n        t, // the current token\n        eol; // is the current token followed by EOL?\n\n    function token() {\n      if (I >= N) return EOF; // special case: end of file\n      if (eol) return eol = false, EOL; // special case: end of line\n\n      // special case: quotes\n      var j = I, c;\n      if (text.charCodeAt(j) === 34) {\n        var i = j;\n        while (i++ < N) {\n          if (text.charCodeAt(i) === 34) {\n            if (text.charCodeAt(i + 1) !== 34) break;\n            ++i;\n          }\n        }\n        I = i + 2;\n        c = text.charCodeAt(i + 1);\n        if (c === 13) {\n          eol = true;\n          if (text.charCodeAt(i + 2) === 10) ++I;\n        } else if (c === 10) {\n          eol = true;\n        }\n        return text.slice(j + 1, i).replace(/\"\"/g, \"\\\"\");\n      }\n\n      // common case: find next delimiter or newline\n      while (I < N) {\n        var k = 1;\n        c = text.charCodeAt(I++);\n        if (c === 10) eol = true; // \\n\n        else if (c === 13) { eol = true; if (text.charCodeAt(I) === 10) ++I, ++k; } // \\r|\\r\\n\n        else if (c !== delimiterCode) continue;\n        return text.slice(j, I - k);\n      }\n\n      // special case: last token before EOF\n      return text.slice(j);\n    }\n\n    while ((t = token()) !== EOF) {\n      var a = [];\n      while (t !== EOL && t !== EOF) {\n        a.push(t);\n        t = token();\n      }\n      if (f && (a = f(a, n++)) == null) continue;\n      rows.push(a);\n    }\n\n    return rows;\n  }\n\n  function format(rows, columns) {\n    if (columns == null) columns = inferColumns(rows);\n    return [columns.map(formatValue).join(delimiter)].concat(rows.map(function(row) {\n      return columns.map(function(column) {\n        return formatValue(row[column]);\n      }).join(delimiter);\n    })).join(\"\\n\");\n  }\n\n  function formatRows(rows) {\n    return rows.map(formatRow).join(\"\\n\");\n  }\n\n  function formatRow(row) {\n    return row.map(formatValue).join(delimiter);\n  }\n\n  function formatValue(text) {\n    return text == null ? \"\"\n        : reFormat.test(text += \"\") ? \"\\\"\" + text.replace(/\\\"/g, \"\\\"\\\"\") + \"\\\"\"\n        : text;\n  }\n\n  return {\n    parse: parse,\n    parseRows: parseRows,\n    format: format,\n    formatRows: formatRows\n  };\n};\n\nvar csv = dsv(\",\");\n\nvar csvParse = csv.parse;\nvar csvParseRows = csv.parseRows;\nvar csvFormat = csv.format;\nvar csvFormatRows = csv.formatRows;\n\nvar tsv = dsv(\"\\t\");\n\nvar tsvParse = tsv.parse;\nvar tsvParseRows = tsv.parseRows;\nvar tsvFormat = tsv.format;\nvar tsvFormatRows = tsv.formatRows;\n\nvar request = function(url, callback) {\n  var request,\n      event = dispatch(\"beforesend\", \"progress\", \"load\", \"error\"),\n      mimeType,\n      headers = map$1(),\n      xhr = new XMLHttpRequest,\n      user = null,\n      password = null,\n      response,\n      responseType,\n      timeout = 0;\n\n  // If IE does not support CORS, use XDomainRequest.\n  if (typeof XDomainRequest !== \"undefined\"\n      && !(\"withCredentials\" in xhr)\n      && /^(http(s)?:)?\\/\\//.test(url)) xhr = new XDomainRequest;\n\n  \"onload\" in xhr\n      ? xhr.onload = xhr.onerror = xhr.ontimeout = respond\n      : xhr.onreadystatechange = function(o) { xhr.readyState > 3 && respond(o); };\n\n  function respond(o) {\n    var status = xhr.status, result;\n    if (!status && hasResponse(xhr)\n        || status >= 200 && status < 300\n        || status === 304) {\n      if (response) {\n        try {\n          result = response.call(request, xhr);\n        } catch (e) {\n          event.call(\"error\", request, e);\n          return;\n        }\n      } else {\n        result = xhr;\n      }\n      event.call(\"load\", request, result);\n    } else {\n      event.call(\"error\", request, o);\n    }\n  }\n\n  xhr.onprogress = function(e) {\n    event.call(\"progress\", request, e);\n  };\n\n  request = {\n    header: function(name, value) {\n      name = (name + \"\").toLowerCase();\n      if (arguments.length < 2) return headers.get(name);\n      if (value == null) headers.remove(name);\n      else headers.set(name, value + \"\");\n      return request;\n    },\n\n    // If mimeType is non-null and no Accept header is set, a default is used.\n    mimeType: function(value) {\n      if (!arguments.length) return mimeType;\n      mimeType = value == null ? null : value + \"\";\n      return request;\n    },\n\n    // Specifies what type the response value should take;\n    // for instance, arraybuffer, blob, document, or text.\n    responseType: function(value) {\n      if (!arguments.length) return responseType;\n      responseType = value;\n      return request;\n    },\n\n    timeout: function(value) {\n      if (!arguments.length) return timeout;\n      timeout = +value;\n      return request;\n    },\n\n    user: function(value) {\n      return arguments.length < 1 ? user : (user = value == null ? null : value + \"\", request);\n    },\n\n    password: function(value) {\n      return arguments.length < 1 ? password : (password = value == null ? null : value + \"\", request);\n    },\n\n    // Specify how to convert the response content to a specific type;\n    // changes the callback value on \"load\" events.\n    response: function(value) {\n      response = value;\n      return request;\n    },\n\n    // Alias for send(\"GET\", …).\n    get: function(data, callback) {\n      return request.send(\"GET\", data, callback);\n    },\n\n    // Alias for send(\"POST\", …).\n    post: function(data, callback) {\n      return request.send(\"POST\", data, callback);\n    },\n\n    // If callback is non-null, it will be used for error and load events.\n    send: function(method, data, callback) {\n      xhr.open(method, url, true, user, password);\n      if (mimeType != null && !headers.has(\"accept\")) headers.set(\"accept\", mimeType + \",*/*\");\n      if (xhr.setRequestHeader) headers.each(function(value, name) { xhr.setRequestHeader(name, value); });\n      if (mimeType != null && xhr.overrideMimeType) xhr.overrideMimeType(mimeType);\n      if (responseType != null) xhr.responseType = responseType;\n      if (timeout > 0) xhr.timeout = timeout;\n      if (callback == null && typeof data === \"function\") callback = data, data = null;\n      if (callback != null && callback.length === 1) callback = fixCallback(callback);\n      if (callback != null) request.on(\"error\", callback).on(\"load\", function(xhr) { callback(null, xhr); });\n      event.call(\"beforesend\", request, xhr);\n      xhr.send(data == null ? null : data);\n      return request;\n    },\n\n    abort: function() {\n      xhr.abort();\n      return request;\n    },\n\n    on: function() {\n      var value = event.on.apply(event, arguments);\n      return value === event ? request : value;\n    }\n  };\n\n  if (callback != null) {\n    if (typeof callback !== \"function\") throw new Error(\"invalid callback: \" + callback);\n    return request.get(callback);\n  }\n\n  return request;\n};\n\nfunction fixCallback(callback) {\n  return function(error, xhr) {\n    callback(error == null ? xhr : null);\n  };\n}\n\nfunction hasResponse(xhr) {\n  var type = xhr.responseType;\n  return type && type !== \"text\"\n      ? xhr.response // null on error\n      : xhr.responseText; // \"\" on error\n}\n\nvar type = function(defaultMimeType, response) {\n  return function(url, callback) {\n    var r = request(url).mimeType(defaultMimeType).response(response);\n    if (callback != null) {\n      if (typeof callback !== \"function\") throw new Error(\"invalid callback: \" + callback);\n      return r.get(callback);\n    }\n    return r;\n  };\n};\n\nvar html = type(\"text/html\", function(xhr) {\n  return document.createRange().createContextualFragment(xhr.responseText);\n});\n\nvar json = type(\"application/json\", function(xhr) {\n  return JSON.parse(xhr.responseText);\n});\n\nvar text = type(\"text/plain\", function(xhr) {\n  return xhr.responseText;\n});\n\nvar xml = type(\"application/xml\", function(xhr) {\n  var xml = xhr.responseXML;\n  if (!xml) throw new Error(\"parse error\");\n  return xml;\n});\n\nvar dsv$1 = function(defaultMimeType, parse) {\n  return function(url, row, callback) {\n    if (arguments.length < 3) callback = row, row = null;\n    var r = request(url).mimeType(defaultMimeType);\n    r.row = function(_) { return arguments.length ? r.response(responseOf(parse, row = _)) : row; };\n    r.row(row);\n    return callback ? r.get(callback) : r;\n  };\n};\n\nfunction responseOf(parse, row) {\n  return function(request$$1) {\n    return parse(request$$1.responseText, row);\n  };\n}\n\nvar csv$1 = dsv$1(\"text/csv\", csvParse);\n\nvar tsv$1 = dsv$1(\"text/tab-separated-values\", tsvParse);\n\nvar frame = 0;\nvar timeout = 0;\nvar interval = 0;\nvar pokeDelay = 1000;\nvar taskHead;\nvar taskTail;\nvar clockLast = 0;\nvar clockNow = 0;\nvar clockSkew = 0;\nvar clock = typeof performance === \"object\" && performance.now ? performance : Date;\nvar setFrame = typeof requestAnimationFrame === \"function\" ? requestAnimationFrame : function(f) { setTimeout(f, 17); };\n\nfunction now() {\n  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);\n}\n\nfunction clearNow() {\n  clockNow = 0;\n}\n\nfunction Timer() {\n  this._call =\n  this._time =\n  this._next = null;\n}\n\nTimer.prototype = timer.prototype = {\n  constructor: Timer,\n  restart: function(callback, delay, time) {\n    if (typeof callback !== \"function\") throw new TypeError(\"callback is not a function\");\n    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);\n    if (!this._next && taskTail !== this) {\n      if (taskTail) taskTail._next = this;\n      else taskHead = this;\n      taskTail = this;\n    }\n    this._call = callback;\n    this._time = time;\n    sleep();\n  },\n  stop: function() {\n    if (this._call) {\n      this._call = null;\n      this._time = Infinity;\n      sleep();\n    }\n  }\n};\n\nfunction timer(callback, delay, time) {\n  var t = new Timer;\n  t.restart(callback, delay, time);\n  return t;\n}\n\nfunction timerFlush() {\n  now(); // Get the current time, if not already set.\n  ++frame; // Pretend we’ve set an alarm, if we haven’t already.\n  var t = taskHead, e;\n  while (t) {\n    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);\n    t = t._next;\n  }\n  --frame;\n}\n\nfunction wake() {\n  clockNow = (clockLast = clock.now()) + clockSkew;\n  frame = timeout = 0;\n  try {\n    timerFlush();\n  } finally {\n    frame = 0;\n    nap();\n    clockNow = 0;\n  }\n}\n\nfunction poke$1() {\n  var now = clock.now(), delay = now - clockLast;\n  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;\n}\n\nfunction nap() {\n  var t0, t1 = taskHead, t2, time = Infinity;\n  while (t1) {\n    if (t1._call) {\n      if (time > t1._time) time = t1._time;\n      t0 = t1, t1 = t1._next;\n    } else {\n      t2 = t1._next, t1._next = null;\n      t1 = t0 ? t0._next = t2 : taskHead = t2;\n    }\n  }\n  taskTail = t0;\n  sleep(time);\n}\n\nfunction sleep(time) {\n  if (frame) return; // Soonest alarm already set, or will be.\n  if (timeout) timeout = clearTimeout(timeout);\n  var delay = time - clockNow;\n  if (delay > 24) {\n    if (time < Infinity) timeout = setTimeout(wake, delay);\n    if (interval) interval = clearInterval(interval);\n  } else {\n    if (!interval) interval = setInterval(poke$1, pokeDelay);\n    frame = 1, setFrame(wake);\n  }\n}\n\nvar timeout$1 = function(callback, delay, time) {\n  var t = new Timer;\n  delay = delay == null ? 0 : +delay;\n  t.restart(function(elapsed) {\n    t.stop();\n    callback(elapsed + delay);\n  }, delay, time);\n  return t;\n};\n\nvar interval$1 = function(callback, delay, time) {\n  var t = new Timer, total = delay;\n  if (delay == null) return t.restart(callback, delay, time), t;\n  delay = +delay, time = time == null ? now() : +time;\n  t.restart(function tick(elapsed) {\n    elapsed += total;\n    t.restart(tick, total += delay, time);\n    callback(elapsed);\n  }, delay, time);\n  return t;\n};\n\nvar t0$1 = new Date;\nvar t1$1 = new Date;\n\nfunction newInterval(floori, offseti, count, field) {\n\n  function interval(date) {\n    return floori(date = new Date(+date)), date;\n  }\n\n  interval.floor = interval;\n\n  interval.ceil = function(date) {\n    return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;\n  };\n\n  interval.round = function(date) {\n    var d0 = interval(date),\n        d1 = interval.ceil(date);\n    return date - d0 < d1 - date ? d0 : d1;\n  };\n\n  interval.offset = function(date, step) {\n    return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;\n  };\n\n  interval.range = function(start, stop, step) {\n    var range = [];\n    start = interval.ceil(start);\n    step = step == null ? 1 : Math.floor(step);\n    if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date\n    do range.push(new Date(+start)); while (offseti(start, step), floori(start), start < stop)\n    return range;\n  };\n\n  interval.filter = function(test) {\n    return newInterval(function(date) {\n      if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);\n    }, function(date, step) {\n      if (date >= date) while (--step >= 0) while (offseti(date, 1), !test(date)) {} // eslint-disable-line no-empty\n    });\n  };\n\n  if (count) {\n    interval.count = function(start, end) {\n      t0$1.setTime(+start), t1$1.setTime(+end);\n      floori(t0$1), floori(t1$1);\n      return Math.floor(count(t0$1, t1$1));\n    };\n\n    interval.every = function(step) {\n      step = Math.floor(step);\n      return !isFinite(step) || !(step > 0) ? null\n          : !(step > 1) ? interval\n          : interval.filter(field\n              ? function(d) { return field(d) % step === 0; }\n              : function(d) { return interval.count(0, d) % step === 0; });\n    };\n  }\n\n  return interval;\n}\n\nvar millisecond = newInterval(function() {\n  // noop\n}, function(date, step) {\n  date.setTime(+date + step);\n}, function(start, end) {\n  return end - start;\n});\n\n// An optimized implementation for this simple case.\nmillisecond.every = function(k) {\n  k = Math.floor(k);\n  if (!isFinite(k) || !(k > 0)) return null;\n  if (!(k > 1)) return millisecond;\n  return newInterval(function(date) {\n    date.setTime(Math.floor(date / k) * k);\n  }, function(date, step) {\n    date.setTime(+date + step * k);\n  }, function(start, end) {\n    return (end - start) / k;\n  });\n};\n\nvar milliseconds = millisecond.range;\n\nvar durationSecond = 1e3;\nvar durationMinute = 6e4;\nvar durationHour = 36e5;\nvar durationDay = 864e5;\nvar durationWeek = 6048e5;\n\nvar second = newInterval(function(date) {\n  date.setTime(Math.floor(date / durationSecond) * durationSecond);\n}, function(date, step) {\n  date.setTime(+date + step * durationSecond);\n}, function(start, end) {\n  return (end - start) / durationSecond;\n}, function(date) {\n  return date.getUTCSeconds();\n});\n\nvar seconds = second.range;\n\nvar minute = newInterval(function(date) {\n  date.setTime(Math.floor(date / durationMinute) * durationMinute);\n}, function(date, step) {\n  date.setTime(+date + step * durationMinute);\n}, function(start, end) {\n  return (end - start) / durationMinute;\n}, function(date) {\n  return date.getMinutes();\n});\n\nvar minutes = minute.range;\n\nvar hour = newInterval(function(date) {\n  var offset = date.getTimezoneOffset() * durationMinute % durationHour;\n  if (offset < 0) offset += durationHour;\n  date.setTime(Math.floor((+date - offset) / durationHour) * durationHour + offset);\n}, function(date, step) {\n  date.setTime(+date + step * durationHour);\n}, function(start, end) {\n  return (end - start) / durationHour;\n}, function(date) {\n  return date.getHours();\n});\n\nvar hours = hour.range;\n\nvar day = newInterval(function(date) {\n  date.setHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setDate(date.getDate() + step);\n}, function(start, end) {\n  return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay;\n}, function(date) {\n  return date.getDate() - 1;\n});\n\nvar days = day.range;\n\nfunction weekday(i) {\n  return newInterval(function(date) {\n    date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);\n    date.setHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setDate(date.getDate() + step * 7);\n  }, function(start, end) {\n    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;\n  });\n}\n\nvar sunday = weekday(0);\nvar monday = weekday(1);\nvar tuesday = weekday(2);\nvar wednesday = weekday(3);\nvar thursday = weekday(4);\nvar friday = weekday(5);\nvar saturday = weekday(6);\n\nvar sundays = sunday.range;\nvar mondays = monday.range;\nvar tuesdays = tuesday.range;\nvar wednesdays = wednesday.range;\nvar thursdays = thursday.range;\nvar fridays = friday.range;\nvar saturdays = saturday.range;\n\nvar month = newInterval(function(date) {\n  date.setDate(1);\n  date.setHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setMonth(date.getMonth() + step);\n}, function(start, end) {\n  return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;\n}, function(date) {\n  return date.getMonth();\n});\n\nvar months = month.range;\n\nvar year = newInterval(function(date) {\n  date.setMonth(0, 1);\n  date.setHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setFullYear(date.getFullYear() + step);\n}, function(start, end) {\n  return end.getFullYear() - start.getFullYear();\n}, function(date) {\n  return date.getFullYear();\n});\n\n// An optimized implementation for this simple case.\nyear.every = function(k) {\n  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {\n    date.setFullYear(Math.floor(date.getFullYear() / k) * k);\n    date.setMonth(0, 1);\n    date.setHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setFullYear(date.getFullYear() + step * k);\n  });\n};\n\nvar years = year.range;\n\nvar utcMinute = newInterval(function(date) {\n  date.setUTCSeconds(0, 0);\n}, function(date, step) {\n  date.setTime(+date + step * durationMinute);\n}, function(start, end) {\n  return (end - start) / durationMinute;\n}, function(date) {\n  return date.getUTCMinutes();\n});\n\nvar utcMinutes = utcMinute.range;\n\nvar utcHour = newInterval(function(date) {\n  date.setUTCMinutes(0, 0, 0);\n}, function(date, step) {\n  date.setTime(+date + step * durationHour);\n}, function(start, end) {\n  return (end - start) / durationHour;\n}, function(date) {\n  return date.getUTCHours();\n});\n\nvar utcHours = utcHour.range;\n\nvar utcDay = newInterval(function(date) {\n  date.setUTCHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setUTCDate(date.getUTCDate() + step);\n}, function(start, end) {\n  return (end - start) / durationDay;\n}, function(date) {\n  return date.getUTCDate() - 1;\n});\n\nvar utcDays = utcDay.range;\n\nfunction utcWeekday(i) {\n  return newInterval(function(date) {\n    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);\n    date.setUTCHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setUTCDate(date.getUTCDate() + step * 7);\n  }, function(start, end) {\n    return (end - start) / durationWeek;\n  });\n}\n\nvar utcSunday = utcWeekday(0);\nvar utcMonday = utcWeekday(1);\nvar utcTuesday = utcWeekday(2);\nvar utcWednesday = utcWeekday(3);\nvar utcThursday = utcWeekday(4);\nvar utcFriday = utcWeekday(5);\nvar utcSaturday = utcWeekday(6);\n\nvar utcSundays = utcSunday.range;\nvar utcMondays = utcMonday.range;\nvar utcTuesdays = utcTuesday.range;\nvar utcWednesdays = utcWednesday.range;\nvar utcThursdays = utcThursday.range;\nvar utcFridays = utcFriday.range;\nvar utcSaturdays = utcSaturday.range;\n\nvar utcMonth = newInterval(function(date) {\n  date.setUTCDate(1);\n  date.setUTCHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setUTCMonth(date.getUTCMonth() + step);\n}, function(start, end) {\n  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;\n}, function(date) {\n  return date.getUTCMonth();\n});\n\nvar utcMonths = utcMonth.range;\n\nvar utcYear = newInterval(function(date) {\n  date.setUTCMonth(0, 1);\n  date.setUTCHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setUTCFullYear(date.getUTCFullYear() + step);\n}, function(start, end) {\n  return end.getUTCFullYear() - start.getUTCFullYear();\n}, function(date) {\n  return date.getUTCFullYear();\n});\n\n// An optimized implementation for this simple case.\nutcYear.every = function(k) {\n  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {\n    date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);\n    date.setUTCMonth(0, 1);\n    date.setUTCHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setUTCFullYear(date.getUTCFullYear() + step * k);\n  });\n};\n\nvar utcYears = utcYear.range;\n\n// Computes the decimal coefficient and exponent of the specified number x with\n// significant digits p, where x is positive and p is in [1, 21] or undefined.\n// For example, formatDecimal(1.23) returns [\"123\", 0].\nvar formatDecimal = function(x, p) {\n  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf(\"e\")) < 0) return null; // NaN, ±Infinity\n  var i, coefficient = x.slice(0, i);\n\n  // The string returned by toExponential either has the form \\d\\.\\d+e[-+]\\d+\n  // (e.g., 1.2e+3) or the form \\de[-+]\\d+ (e.g., 1e+3).\n  return [\n    coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,\n    +x.slice(i + 1)\n  ];\n};\n\nvar exponent$1 = function(x) {\n  return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;\n};\n\nvar formatGroup = function(grouping, thousands) {\n  return function(value, width) {\n    var i = value.length,\n        t = [],\n        j = 0,\n        g = grouping[0],\n        length = 0;\n\n    while (i > 0 && g > 0) {\n      if (length + g + 1 > width) g = Math.max(1, width - length);\n      t.push(value.substring(i -= g, i + g));\n      if ((length += g + 1) > width) break;\n      g = grouping[j = (j + 1) % grouping.length];\n    }\n\n    return t.reverse().join(thousands);\n  };\n};\n\nvar formatDefault = function(x, p) {\n  x = x.toPrecision(p);\n\n  out: for (var n = x.length, i = 1, i0 = -1, i1; i < n; ++i) {\n    switch (x[i]) {\n      case \".\": i0 = i1 = i; break;\n      case \"0\": if (i0 === 0) i0 = i; i1 = i; break;\n      case \"e\": break out;\n      default: if (i0 > 0) i0 = 0; break;\n    }\n  }\n\n  return i0 > 0 ? x.slice(0, i0) + x.slice(i1 + 1) : x;\n};\n\nvar prefixExponent;\n\nvar formatPrefixAuto = function(x, p) {\n  var d = formatDecimal(x, p);\n  if (!d) return x + \"\";\n  var coefficient = d[0],\n      exponent = d[1],\n      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,\n      n = coefficient.length;\n  return i === n ? coefficient\n      : i > n ? coefficient + new Array(i - n + 1).join(\"0\")\n      : i > 0 ? coefficient.slice(0, i) + \".\" + coefficient.slice(i)\n      : \"0.\" + new Array(1 - i).join(\"0\") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!\n};\n\nvar formatRounded = function(x, p) {\n  var d = formatDecimal(x, p);\n  if (!d) return x + \"\";\n  var coefficient = d[0],\n      exponent = d[1];\n  return exponent < 0 ? \"0.\" + new Array(-exponent).join(\"0\") + coefficient\n      : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + \".\" + coefficient.slice(exponent + 1)\n      : coefficient + new Array(exponent - coefficient.length + 2).join(\"0\");\n};\n\nvar formatTypes = {\n  \"\": formatDefault,\n  \"%\": function(x, p) { return (x * 100).toFixed(p); },\n  \"b\": function(x) { return Math.round(x).toString(2); },\n  \"c\": function(x) { return x + \"\"; },\n  \"d\": function(x) { return Math.round(x).toString(10); },\n  \"e\": function(x, p) { return x.toExponential(p); },\n  \"f\": function(x, p) { return x.toFixed(p); },\n  \"g\": function(x, p) { return x.toPrecision(p); },\n  \"o\": function(x) { return Math.round(x).toString(8); },\n  \"p\": function(x, p) { return formatRounded(x * 100, p); },\n  \"r\": formatRounded,\n  \"s\": formatPrefixAuto,\n  \"X\": function(x) { return Math.round(x).toString(16).toUpperCase(); },\n  \"x\": function(x) { return Math.round(x).toString(16); }\n};\n\n// [[fill]align][sign][symbol][0][width][,][.precision][type]\nvar re = /^(?:(.)?([<>=^]))?([+\\-\\( ])?([$#])?(0)?(\\d+)?(,)?(\\.\\d+)?([a-z%])?$/i;\n\nvar formatSpecifier = function(specifier) {\n  return new FormatSpecifier(specifier);\n};\n\nfunction FormatSpecifier(specifier) {\n  if (!(match = re.exec(specifier))) throw new Error(\"invalid format: \" + specifier);\n\n  var match,\n      fill = match[1] || \" \",\n      align = match[2] || \">\",\n      sign = match[3] || \"-\",\n      symbol = match[4] || \"\",\n      zero = !!match[5],\n      width = match[6] && +match[6],\n      comma = !!match[7],\n      precision = match[8] && +match[8].slice(1),\n      type = match[9] || \"\";\n\n  // The \"n\" type is an alias for \",g\".\n  if (type === \"n\") comma = true, type = \"g\";\n\n  // Map invalid types to the default format.\n  else if (!formatTypes[type]) type = \"\";\n\n  // If zero fill is specified, padding goes after sign and before digits.\n  if (zero || (fill === \"0\" && align === \"=\")) zero = true, fill = \"0\", align = \"=\";\n\n  this.fill = fill;\n  this.align = align;\n  this.sign = sign;\n  this.symbol = symbol;\n  this.zero = zero;\n  this.width = width;\n  this.comma = comma;\n  this.precision = precision;\n  this.type = type;\n}\n\nFormatSpecifier.prototype.toString = function() {\n  return this.fill\n      + this.align\n      + this.sign\n      + this.symbol\n      + (this.zero ? \"0\" : \"\")\n      + (this.width == null ? \"\" : Math.max(1, this.width | 0))\n      + (this.comma ? \",\" : \"\")\n      + (this.precision == null ? \"\" : \".\" + Math.max(0, this.precision | 0))\n      + this.type;\n};\n\nvar prefixes = [\"y\",\"z\",\"a\",\"f\",\"p\",\"n\",\"\\xB5\",\"m\",\"\",\"k\",\"M\",\"G\",\"T\",\"P\",\"E\",\"Z\",\"Y\"];\n\nfunction identity$3(x) {\n  return x;\n}\n\nvar formatLocale = function(locale) {\n  var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3,\n      currency = locale.currency,\n      decimal = locale.decimal;\n\n  function newFormat(specifier) {\n    specifier = formatSpecifier(specifier);\n\n    var fill = specifier.fill,\n        align = specifier.align,\n        sign = specifier.sign,\n        symbol = specifier.symbol,\n        zero = specifier.zero,\n        width = specifier.width,\n        comma = specifier.comma,\n        precision = specifier.precision,\n        type = specifier.type;\n\n    // Compute the prefix and suffix.\n    // For SI-prefix, the suffix is lazily computed.\n    var prefix = symbol === \"$\" ? currency[0] : symbol === \"#\" && /[boxX]/.test(type) ? \"0\" + type.toLowerCase() : \"\",\n        suffix = symbol === \"$\" ? currency[1] : /[%p]/.test(type) ? \"%\" : \"\";\n\n    // What format function should we use?\n    // Is this an integer type?\n    // Can this type generate exponential notation?\n    var formatType = formatTypes[type],\n        maybeSuffix = !type || /[defgprs%]/.test(type);\n\n    // Set the default precision if not specified,\n    // or clamp the specified precision to the supported range.\n    // For significant precision, it must be in [1, 21].\n    // For fixed precision, it must be in [0, 20].\n    precision = precision == null ? (type ? 6 : 12)\n        : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))\n        : Math.max(0, Math.min(20, precision));\n\n    function format(value) {\n      var valuePrefix = prefix,\n          valueSuffix = suffix,\n          i, n, c;\n\n      if (type === \"c\") {\n        valueSuffix = formatType(value) + valueSuffix;\n        value = \"\";\n      } else {\n        value = +value;\n\n        // Convert negative to positive, and compute the prefix.\n        // Note that -0 is not less than 0, but 1 / -0 is!\n        var valueNegative = (value < 0 || 1 / value < 0) && (value *= -1, true);\n\n        // Perform the initial formatting.\n        value = formatType(value, precision);\n\n        // If the original value was negative, it may be rounded to zero during\n        // formatting; treat this as (positive) zero.\n        if (valueNegative) {\n          i = -1, n = value.length;\n          valueNegative = false;\n          while (++i < n) {\n            if (c = value.charCodeAt(i), (48 < c && c < 58)\n                || (type === \"x\" && 96 < c && c < 103)\n                || (type === \"X\" && 64 < c && c < 71)) {\n              valueNegative = true;\n              break;\n            }\n          }\n        }\n\n        // Compute the prefix and suffix.\n        valuePrefix = (valueNegative ? (sign === \"(\" ? sign : \"-\") : sign === \"-\" || sign === \"(\" ? \"\" : sign) + valuePrefix;\n        valueSuffix = valueSuffix + (type === \"s\" ? prefixes[8 + prefixExponent / 3] : \"\") + (valueNegative && sign === \"(\" ? \")\" : \"\");\n\n        // Break the formatted value into the integer “value” part that can be\n        // grouped, and fractional or exponential “suffix” part that is not.\n        if (maybeSuffix) {\n          i = -1, n = value.length;\n          while (++i < n) {\n            if (c = value.charCodeAt(i), 48 > c || c > 57) {\n              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;\n              value = value.slice(0, i);\n              break;\n            }\n          }\n        }\n      }\n\n      // If the fill character is not \"0\", grouping is applied before padding.\n      if (comma && !zero) value = group(value, Infinity);\n\n      // Compute the padding.\n      var length = valuePrefix.length + value.length + valueSuffix.length,\n          padding = length < width ? new Array(width - length + 1).join(fill) : \"\";\n\n      // If the fill character is \"0\", grouping is applied after padding.\n      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = \"\";\n\n      // Reconstruct the final output based on the desired alignment.\n      switch (align) {\n        case \"<\": return valuePrefix + value + valueSuffix + padding;\n        case \"=\": return valuePrefix + padding + value + valueSuffix;\n        case \"^\": return padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);\n      }\n      return padding + valuePrefix + value + valueSuffix;\n    }\n\n    format.toString = function() {\n      return specifier + \"\";\n    };\n\n    return format;\n  }\n\n  function formatPrefix(specifier, value) {\n    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = \"f\", specifier)),\n        e = Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3,\n        k = Math.pow(10, -e),\n        prefix = prefixes[8 + e / 3];\n    return function(value) {\n      return f(k * value) + prefix;\n    };\n  }\n\n  return {\n    format: newFormat,\n    formatPrefix: formatPrefix\n  };\n};\n\nvar locale$1;\n\n\n\ndefaultLocale({\n  decimal: \".\",\n  thousands: \",\",\n  grouping: [3],\n  currency: [\"$\", \"\"]\n});\n\nfunction defaultLocale(definition) {\n  locale$1 = formatLocale(definition);\n  exports.format = locale$1.format;\n  exports.formatPrefix = locale$1.formatPrefix;\n  return locale$1;\n}\n\nvar precisionFixed = function(step) {\n  return Math.max(0, -exponent$1(Math.abs(step)));\n};\n\nvar precisionPrefix = function(step, value) {\n  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3 - exponent$1(Math.abs(step)));\n};\n\nvar precisionRound = function(step, max) {\n  step = Math.abs(step), max = Math.abs(max) - step;\n  return Math.max(0, exponent$1(max) - exponent$1(step)) + 1;\n};\n\nfunction localDate(d) {\n  if (0 <= d.y && d.y < 100) {\n    var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);\n    date.setFullYear(d.y);\n    return date;\n  }\n  return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);\n}\n\nfunction utcDate(d) {\n  if (0 <= d.y && d.y < 100) {\n    var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));\n    date.setUTCFullYear(d.y);\n    return date;\n  }\n  return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));\n}\n\nfunction newYear(y) {\n  return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0};\n}\n\nfunction formatLocale$1(locale) {\n  var locale_dateTime = locale.dateTime,\n      locale_date = locale.date,\n      locale_time = locale.time,\n      locale_periods = locale.periods,\n      locale_weekdays = locale.days,\n      locale_shortWeekdays = locale.shortDays,\n      locale_months = locale.months,\n      locale_shortMonths = locale.shortMonths;\n\n  var periodRe = formatRe(locale_periods),\n      periodLookup = formatLookup(locale_periods),\n      weekdayRe = formatRe(locale_weekdays),\n      weekdayLookup = formatLookup(locale_weekdays),\n      shortWeekdayRe = formatRe(locale_shortWeekdays),\n      shortWeekdayLookup = formatLookup(locale_shortWeekdays),\n      monthRe = formatRe(locale_months),\n      monthLookup = formatLookup(locale_months),\n      shortMonthRe = formatRe(locale_shortMonths),\n      shortMonthLookup = formatLookup(locale_shortMonths);\n\n  var formats = {\n    \"a\": formatShortWeekday,\n    \"A\": formatWeekday,\n    \"b\": formatShortMonth,\n    \"B\": formatMonth,\n    \"c\": null,\n    \"d\": formatDayOfMonth,\n    \"e\": formatDayOfMonth,\n    \"H\": formatHour24,\n    \"I\": formatHour12,\n    \"j\": formatDayOfYear,\n    \"L\": formatMilliseconds,\n    \"m\": formatMonthNumber,\n    \"M\": formatMinutes,\n    \"p\": formatPeriod,\n    \"S\": formatSeconds,\n    \"U\": formatWeekNumberSunday,\n    \"w\": formatWeekdayNumber,\n    \"W\": formatWeekNumberMonday,\n    \"x\": null,\n    \"X\": null,\n    \"y\": formatYear,\n    \"Y\": formatFullYear,\n    \"Z\": formatZone,\n    \"%\": formatLiteralPercent\n  };\n\n  var utcFormats = {\n    \"a\": formatUTCShortWeekday,\n    \"A\": formatUTCWeekday,\n    \"b\": formatUTCShortMonth,\n    \"B\": formatUTCMonth,\n    \"c\": null,\n    \"d\": formatUTCDayOfMonth,\n    \"e\": formatUTCDayOfMonth,\n    \"H\": formatUTCHour24,\n    \"I\": formatUTCHour12,\n    \"j\": formatUTCDayOfYear,\n    \"L\": formatUTCMilliseconds,\n    \"m\": formatUTCMonthNumber,\n    \"M\": formatUTCMinutes,\n    \"p\": formatUTCPeriod,\n    \"S\": formatUTCSeconds,\n    \"U\": formatUTCWeekNumberSunday,\n    \"w\": formatUTCWeekdayNumber,\n    \"W\": formatUTCWeekNumberMonday,\n    \"x\": null,\n    \"X\": null,\n    \"y\": formatUTCYear,\n    \"Y\": formatUTCFullYear,\n    \"Z\": formatUTCZone,\n    \"%\": formatLiteralPercent\n  };\n\n  var parses = {\n    \"a\": parseShortWeekday,\n    \"A\": parseWeekday,\n    \"b\": parseShortMonth,\n    \"B\": parseMonth,\n    \"c\": parseLocaleDateTime,\n    \"d\": parseDayOfMonth,\n    \"e\": parseDayOfMonth,\n    \"H\": parseHour24,\n    \"I\": parseHour24,\n    \"j\": parseDayOfYear,\n    \"L\": parseMilliseconds,\n    \"m\": parseMonthNumber,\n    \"M\": parseMinutes,\n    \"p\": parsePeriod,\n    \"S\": parseSeconds,\n    \"U\": parseWeekNumberSunday,\n    \"w\": parseWeekdayNumber,\n    \"W\": parseWeekNumberMonday,\n    \"x\": parseLocaleDate,\n    \"X\": parseLocaleTime,\n    \"y\": parseYear,\n    \"Y\": parseFullYear,\n    \"Z\": parseZone,\n    \"%\": parseLiteralPercent\n  };\n\n  // These recursive directive definitions must be deferred.\n  formats.x = newFormat(locale_date, formats);\n  formats.X = newFormat(locale_time, formats);\n  formats.c = newFormat(locale_dateTime, formats);\n  utcFormats.x = newFormat(locale_date, utcFormats);\n  utcFormats.X = newFormat(locale_time, utcFormats);\n  utcFormats.c = newFormat(locale_dateTime, utcFormats);\n\n  function newFormat(specifier, formats) {\n    return function(date) {\n      var string = [],\n          i = -1,\n          j = 0,\n          n = specifier.length,\n          c,\n          pad,\n          format;\n\n      if (!(date instanceof Date)) date = new Date(+date);\n\n      while (++i < n) {\n        if (specifier.charCodeAt(i) === 37) {\n          string.push(specifier.slice(j, i));\n          if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);\n          else pad = c === \"e\" ? \" \" : \"0\";\n          if (format = formats[c]) c = format(date, pad);\n          string.push(c);\n          j = i + 1;\n        }\n      }\n\n      string.push(specifier.slice(j, i));\n      return string.join(\"\");\n    };\n  }\n\n  function newParse(specifier, newDate) {\n    return function(string) {\n      var d = newYear(1900),\n          i = parseSpecifier(d, specifier, string += \"\", 0);\n      if (i != string.length) return null;\n\n      // The am-pm flag is 0 for AM, and 1 for PM.\n      if (\"p\" in d) d.H = d.H % 12 + d.p * 12;\n\n      // Convert day-of-week and week-of-year to day-of-year.\n      if (\"W\" in d || \"U\" in d) {\n        if (!(\"w\" in d)) d.w = \"W\" in d ? 1 : 0;\n        var day$$1 = \"Z\" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();\n        d.m = 0;\n        d.d = \"W\" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7;\n      }\n\n      // If a time zone is specified, all fields are interpreted as UTC and then\n      // offset according to the specified time zone.\n      if (\"Z\" in d) {\n        d.H += d.Z / 100 | 0;\n        d.M += d.Z % 100;\n        return utcDate(d);\n      }\n\n      // Otherwise, all fields are in local time.\n      return newDate(d);\n    };\n  }\n\n  function parseSpecifier(d, specifier, string, j) {\n    var i = 0,\n        n = specifier.length,\n        m = string.length,\n        c,\n        parse;\n\n    while (i < n) {\n      if (j >= m) return -1;\n      c = specifier.charCodeAt(i++);\n      if (c === 37) {\n        c = specifier.charAt(i++);\n        parse = parses[c in pads ? specifier.charAt(i++) : c];\n        if (!parse || ((j = parse(d, string, j)) < 0)) return -1;\n      } else if (c != string.charCodeAt(j++)) {\n        return -1;\n      }\n    }\n\n    return j;\n  }\n\n  function parsePeriod(d, string, i) {\n    var n = periodRe.exec(string.slice(i));\n    return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseShortWeekday(d, string, i) {\n    var n = shortWeekdayRe.exec(string.slice(i));\n    return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseWeekday(d, string, i) {\n    var n = weekdayRe.exec(string.slice(i));\n    return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseShortMonth(d, string, i) {\n    var n = shortMonthRe.exec(string.slice(i));\n    return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseMonth(d, string, i) {\n    var n = monthRe.exec(string.slice(i));\n    return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseLocaleDateTime(d, string, i) {\n    return parseSpecifier(d, locale_dateTime, string, i);\n  }\n\n  function parseLocaleDate(d, string, i) {\n    return parseSpecifier(d, locale_date, string, i);\n  }\n\n  function parseLocaleTime(d, string, i) {\n    return parseSpecifier(d, locale_time, string, i);\n  }\n\n  function formatShortWeekday(d) {\n    return locale_shortWeekdays[d.getDay()];\n  }\n\n  function formatWeekday(d) {\n    return locale_weekdays[d.getDay()];\n  }\n\n  function formatShortMonth(d) {\n    return locale_shortMonths[d.getMonth()];\n  }\n\n  function formatMonth(d) {\n    return locale_months[d.getMonth()];\n  }\n\n  function formatPeriod(d) {\n    return locale_periods[+(d.getHours() >= 12)];\n  }\n\n  function formatUTCShortWeekday(d) {\n    return locale_shortWeekdays[d.getUTCDay()];\n  }\n\n  function formatUTCWeekday(d) {\n    return locale_weekdays[d.getUTCDay()];\n  }\n\n  function formatUTCShortMonth(d) {\n    return locale_shortMonths[d.getUTCMonth()];\n  }\n\n  function formatUTCMonth(d) {\n    return locale_months[d.getUTCMonth()];\n  }\n\n  function formatUTCPeriod(d) {\n    return locale_periods[+(d.getUTCHours() >= 12)];\n  }\n\n  return {\n    format: function(specifier) {\n      var f = newFormat(specifier += \"\", formats);\n      f.toString = function() { return specifier; };\n      return f;\n    },\n    parse: function(specifier) {\n      var p = newParse(specifier += \"\", localDate);\n      p.toString = function() { return specifier; };\n      return p;\n    },\n    utcFormat: function(specifier) {\n      var f = newFormat(specifier += \"\", utcFormats);\n      f.toString = function() { return specifier; };\n      return f;\n    },\n    utcParse: function(specifier) {\n      var p = newParse(specifier, utcDate);\n      p.toString = function() { return specifier; };\n      return p;\n    }\n  };\n}\n\nvar pads = {\"-\": \"\", \"_\": \" \", \"0\": \"0\"};\nvar numberRe = /^\\s*\\d+/;\nvar percentRe = /^%/;\nvar requoteRe = /[\\\\\\^\\$\\*\\+\\?\\|\\[\\]\\(\\)\\.\\{\\}]/g;\n\nfunction pad(value, fill, width) {\n  var sign = value < 0 ? \"-\" : \"\",\n      string = (sign ? -value : value) + \"\",\n      length = string.length;\n  return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);\n}\n\nfunction requote(s) {\n  return s.replace(requoteRe, \"\\\\$&\");\n}\n\nfunction formatRe(names) {\n  return new RegExp(\"^(?:\" + names.map(requote).join(\"|\") + \")\", \"i\");\n}\n\nfunction formatLookup(names) {\n  var map = {}, i = -1, n = names.length;\n  while (++i < n) map[names[i].toLowerCase()] = i;\n  return map;\n}\n\nfunction parseWeekdayNumber(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 1));\n  return n ? (d.w = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseWeekNumberSunday(d, string, i) {\n  var n = numberRe.exec(string.slice(i));\n  return n ? (d.U = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseWeekNumberMonday(d, string, i) {\n  var n = numberRe.exec(string.slice(i));\n  return n ? (d.W = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseFullYear(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 4));\n  return n ? (d.y = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseYear(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;\n}\n\nfunction parseZone(d, string, i) {\n  var n = /^(Z)|([+-]\\d\\d)(?:\\:?(\\d\\d))?/.exec(string.slice(i, i + 6));\n  return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || \"00\")), i + n[0].length) : -1;\n}\n\nfunction parseMonthNumber(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.m = n[0] - 1, i + n[0].length) : -1;\n}\n\nfunction parseDayOfMonth(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.d = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseDayOfYear(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 3));\n  return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseHour24(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.H = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseMinutes(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.M = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseSeconds(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.S = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseMilliseconds(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 3));\n  return n ? (d.L = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseLiteralPercent(d, string, i) {\n  var n = percentRe.exec(string.slice(i, i + 1));\n  return n ? i + n[0].length : -1;\n}\n\nfunction formatDayOfMonth(d, p) {\n  return pad(d.getDate(), p, 2);\n}\n\nfunction formatHour24(d, p) {\n  return pad(d.getHours(), p, 2);\n}\n\nfunction formatHour12(d, p) {\n  return pad(d.getHours() % 12 || 12, p, 2);\n}\n\nfunction formatDayOfYear(d, p) {\n  return pad(1 + day.count(year(d), d), p, 3);\n}\n\nfunction formatMilliseconds(d, p) {\n  return pad(d.getMilliseconds(), p, 3);\n}\n\nfunction formatMonthNumber(d, p) {\n  return pad(d.getMonth() + 1, p, 2);\n}\n\nfunction formatMinutes(d, p) {\n  return pad(d.getMinutes(), p, 2);\n}\n\nfunction formatSeconds(d, p) {\n  return pad(d.getSeconds(), p, 2);\n}\n\nfunction formatWeekNumberSunday(d, p) {\n  return pad(sunday.count(year(d), d), p, 2);\n}\n\nfunction formatWeekdayNumber(d) {\n  return d.getDay();\n}\n\nfunction formatWeekNumberMonday(d, p) {\n  return pad(monday.count(year(d), d), p, 2);\n}\n\nfunction formatYear(d, p) {\n  return pad(d.getFullYear() % 100, p, 2);\n}\n\nfunction formatFullYear(d, p) {\n  return pad(d.getFullYear() % 10000, p, 4);\n}\n\nfunction formatZone(d) {\n  var z = d.getTimezoneOffset();\n  return (z > 0 ? \"-\" : (z *= -1, \"+\"))\n      + pad(z / 60 | 0, \"0\", 2)\n      + pad(z % 60, \"0\", 2);\n}\n\nfunction formatUTCDayOfMonth(d, p) {\n  return pad(d.getUTCDate(), p, 2);\n}\n\nfunction formatUTCHour24(d, p) {\n  return pad(d.getUTCHours(), p, 2);\n}\n\nfunction formatUTCHour12(d, p) {\n  return pad(d.getUTCHours() % 12 || 12, p, 2);\n}\n\nfunction formatUTCDayOfYear(d, p) {\n  return pad(1 + utcDay.count(utcYear(d), d), p, 3);\n}\n\nfunction formatUTCMilliseconds(d, p) {\n  return pad(d.getUTCMilliseconds(), p, 3);\n}\n\nfunction formatUTCMonthNumber(d, p) {\n  return pad(d.getUTCMonth() + 1, p, 2);\n}\n\nfunction formatUTCMinutes(d, p) {\n  return pad(d.getUTCMinutes(), p, 2);\n}\n\nfunction formatUTCSeconds(d, p) {\n  return pad(d.getUTCSeconds(), p, 2);\n}\n\nfunction formatUTCWeekNumberSunday(d, p) {\n  return pad(utcSunday.count(utcYear(d), d), p, 2);\n}\n\nfunction formatUTCWeekdayNumber(d) {\n  return d.getUTCDay();\n}\n\nfunction formatUTCWeekNumberMonday(d, p) {\n  return pad(utcMonday.count(utcYear(d), d), p, 2);\n}\n\nfunction formatUTCYear(d, p) {\n  return pad(d.getUTCFullYear() % 100, p, 2);\n}\n\nfunction formatUTCFullYear(d, p) {\n  return pad(d.getUTCFullYear() % 10000, p, 4);\n}\n\nfunction formatUTCZone() {\n  return \"+0000\";\n}\n\nfunction formatLiteralPercent() {\n  return \"%\";\n}\n\nvar locale$2;\n\n\n\n\n\ndefaultLocale$1({\n  dateTime: \"%x, %X\",\n  date: \"%-m/%-d/%Y\",\n  time: \"%-I:%M:%S %p\",\n  periods: [\"AM\", \"PM\"],\n  days: [\"Sunday\", \"Monday\", \"Tuesday\", \"Wednesday\", \"Thursday\", \"Friday\", \"Saturday\"],\n  shortDays: [\"Sun\", \"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\"],\n  months: [\"January\", \"February\", \"March\", \"April\", \"May\", \"June\", \"July\", \"August\", \"September\", \"October\", \"November\", \"December\"],\n  shortMonths: [\"Jan\", \"Feb\", \"Mar\", \"Apr\", \"May\", \"Jun\", \"Jul\", \"Aug\", \"Sep\", \"Oct\", \"Nov\", \"Dec\"]\n});\n\nfunction defaultLocale$1(definition) {\n  locale$2 = formatLocale$1(definition);\n  exports.timeFormat = locale$2.format;\n  exports.timeParse = locale$2.parse;\n  exports.utcFormat = locale$2.utcFormat;\n  exports.utcParse = locale$2.utcParse;\n  return locale$2;\n}\n\nvar isoSpecifier = \"%Y-%m-%dT%H:%M:%S.%LZ\";\n\nfunction formatIsoNative(date) {\n  return date.toISOString();\n}\n\nvar formatIso = Date.prototype.toISOString\n    ? formatIsoNative\n    : exports.utcFormat(isoSpecifier);\n\nfunction parseIsoNative(string) {\n  var date = new Date(string);\n  return isNaN(date) ? null : date;\n}\n\nvar parseIso = +new Date(\"2000-01-01T00:00:00.000Z\")\n    ? parseIsoNative\n    : exports.utcParse(isoSpecifier);\n\nvar array$2 = Array.prototype;\n\nvar map$3 = array$2.map;\nvar slice$3 = array$2.slice;\n\nvar implicit = {name: \"implicit\"};\n\nfunction ordinal(range) {\n  var index = map$1(),\n      domain = [],\n      unknown = implicit;\n\n  range = range == null ? [] : slice$3.call(range);\n\n  function scale(d) {\n    var key = d + \"\", i = index.get(key);\n    if (!i) {\n      if (unknown !== implicit) return unknown;\n      index.set(key, i = domain.push(d));\n    }\n    return range[(i - 1) % range.length];\n  }\n\n  scale.domain = function(_) {\n    if (!arguments.length) return domain.slice();\n    domain = [], index = map$1();\n    var i = -1, n = _.length, d, key;\n    while (++i < n) if (!index.has(key = (d = _[i]) + \"\")) index.set(key, domain.push(d));\n    return scale;\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range = slice$3.call(_), scale) : range.slice();\n  };\n\n  scale.unknown = function(_) {\n    return arguments.length ? (unknown = _, scale) : unknown;\n  };\n\n  scale.copy = function() {\n    return ordinal()\n        .domain(domain)\n        .range(range)\n        .unknown(unknown);\n  };\n\n  return scale;\n}\n\nfunction band() {\n  var scale = ordinal().unknown(undefined),\n      domain = scale.domain,\n      ordinalRange = scale.range,\n      range$$1 = [0, 1],\n      step,\n      bandwidth,\n      round = false,\n      paddingInner = 0,\n      paddingOuter = 0,\n      align = 0.5;\n\n  delete scale.unknown;\n\n  function rescale() {\n    var n = domain().length,\n        reverse = range$$1[1] < range$$1[0],\n        start = range$$1[reverse - 0],\n        stop = range$$1[1 - reverse];\n    step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);\n    if (round) step = Math.floor(step);\n    start += (stop - start - step * (n - paddingInner)) * align;\n    bandwidth = step * (1 - paddingInner);\n    if (round) start = Math.round(start), bandwidth = Math.round(bandwidth);\n    var values = range(n).map(function(i) { return start + step * i; });\n    return ordinalRange(reverse ? values.reverse() : values);\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain(_), rescale()) : domain();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range$$1 = [+_[0], +_[1]], rescale()) : range$$1.slice();\n  };\n\n  scale.rangeRound = function(_) {\n    return range$$1 = [+_[0], +_[1]], round = true, rescale();\n  };\n\n  scale.bandwidth = function() {\n    return bandwidth;\n  };\n\n  scale.step = function() {\n    return step;\n  };\n\n  scale.round = function(_) {\n    return arguments.length ? (round = !!_, rescale()) : round;\n  };\n\n  scale.padding = function(_) {\n    return arguments.length ? (paddingInner = paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;\n  };\n\n  scale.paddingInner = function(_) {\n    return arguments.length ? (paddingInner = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;\n  };\n\n  scale.paddingOuter = function(_) {\n    return arguments.length ? (paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingOuter;\n  };\n\n  scale.align = function(_) {\n    return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align;\n  };\n\n  scale.copy = function() {\n    return band()\n        .domain(domain())\n        .range(range$$1)\n        .round(round)\n        .paddingInner(paddingInner)\n        .paddingOuter(paddingOuter)\n        .align(align);\n  };\n\n  return rescale();\n}\n\nfunction pointish(scale) {\n  var copy = scale.copy;\n\n  scale.padding = scale.paddingOuter;\n  delete scale.paddingInner;\n  delete scale.paddingOuter;\n\n  scale.copy = function() {\n    return pointish(copy());\n  };\n\n  return scale;\n}\n\nfunction point$4() {\n  return pointish(band().paddingInner(1));\n}\n\nvar constant$4 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar number$1 = function(x) {\n  return +x;\n};\n\nvar unit = [0, 1];\n\nfunction deinterpolateLinear(a, b) {\n  return (b -= (a = +a))\n      ? function(x) { return (x - a) / b; }\n      : constant$4(b);\n}\n\nfunction deinterpolateClamp(deinterpolate) {\n  return function(a, b) {\n    var d = deinterpolate(a = +a, b = +b);\n    return function(x) { return x <= a ? 0 : x >= b ? 1 : d(x); };\n  };\n}\n\nfunction reinterpolateClamp(reinterpolate) {\n  return function(a, b) {\n    var r = reinterpolate(a = +a, b = +b);\n    return function(t) { return t <= 0 ? a : t >= 1 ? b : r(t); };\n  };\n}\n\nfunction bimap(domain, range$$1, deinterpolate, reinterpolate) {\n  var d0 = domain[0], d1 = domain[1], r0 = range$$1[0], r1 = range$$1[1];\n  if (d1 < d0) d0 = deinterpolate(d1, d0), r0 = reinterpolate(r1, r0);\n  else d0 = deinterpolate(d0, d1), r0 = reinterpolate(r0, r1);\n  return function(x) { return r0(d0(x)); };\n}\n\nfunction polymap(domain, range$$1, deinterpolate, reinterpolate) {\n  var j = Math.min(domain.length, range$$1.length) - 1,\n      d = new Array(j),\n      r = new Array(j),\n      i = -1;\n\n  // Reverse descending domains.\n  if (domain[j] < domain[0]) {\n    domain = domain.slice().reverse();\n    range$$1 = range$$1.slice().reverse();\n  }\n\n  while (++i < j) {\n    d[i] = deinterpolate(domain[i], domain[i + 1]);\n    r[i] = reinterpolate(range$$1[i], range$$1[i + 1]);\n  }\n\n  return function(x) {\n    var i = bisectRight(domain, x, 1, j) - 1;\n    return r[i](d[i](x));\n  };\n}\n\nfunction copy(source, target) {\n  return target\n      .domain(source.domain())\n      .range(source.range())\n      .interpolate(source.interpolate())\n      .clamp(source.clamp());\n}\n\n// deinterpolate(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].\n// reinterpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding domain value x in [a,b].\nfunction continuous(deinterpolate, reinterpolate) {\n  var domain = unit,\n      range$$1 = unit,\n      interpolate$$1 = interpolate,\n      clamp = false,\n      piecewise,\n      output,\n      input;\n\n  function rescale() {\n    piecewise = Math.min(domain.length, range$$1.length) > 2 ? polymap : bimap;\n    output = input = null;\n    return scale;\n  }\n\n  function scale(x) {\n    return (output || (output = piecewise(domain, range$$1, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x);\n  }\n\n  scale.invert = function(y) {\n    return (input || (input = piecewise(range$$1, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y);\n  };\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain = map$3.call(_, number$1), rescale()) : domain.slice();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range$$1 = slice$3.call(_), rescale()) : range$$1.slice();\n  };\n\n  scale.rangeRound = function(_) {\n    return range$$1 = slice$3.call(_), interpolate$$1 = interpolateRound, rescale();\n  };\n\n  scale.clamp = function(_) {\n    return arguments.length ? (clamp = !!_, rescale()) : clamp;\n  };\n\n  scale.interpolate = function(_) {\n    return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1;\n  };\n\n  return rescale();\n}\n\nvar tickFormat = function(domain, count, specifier) {\n  var start = domain[0],\n      stop = domain[domain.length - 1],\n      step = tickStep(start, stop, count == null ? 10 : count),\n      precision;\n  specifier = formatSpecifier(specifier == null ? \",f\" : specifier);\n  switch (specifier.type) {\n    case \"s\": {\n      var value = Math.max(Math.abs(start), Math.abs(stop));\n      if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;\n      return exports.formatPrefix(specifier, value);\n    }\n    case \"\":\n    case \"e\":\n    case \"g\":\n    case \"p\":\n    case \"r\": {\n      if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === \"e\");\n      break;\n    }\n    case \"f\":\n    case \"%\": {\n      if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === \"%\") * 2;\n      break;\n    }\n  }\n  return exports.format(specifier);\n};\n\nfunction linearish(scale) {\n  var domain = scale.domain;\n\n  scale.ticks = function(count) {\n    var d = domain();\n    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);\n  };\n\n  scale.tickFormat = function(count, specifier) {\n    return tickFormat(domain(), count, specifier);\n  };\n\n  scale.nice = function(count) {\n    var d = domain(),\n        i = d.length - 1,\n        n = count == null ? 10 : count,\n        start = d[0],\n        stop = d[i],\n        step = tickStep(start, stop, n);\n\n    if (step) {\n      step = tickStep(Math.floor(start / step) * step, Math.ceil(stop / step) * step, n);\n      d[0] = Math.floor(start / step) * step;\n      d[i] = Math.ceil(stop / step) * step;\n      domain(d);\n    }\n\n    return scale;\n  };\n\n  return scale;\n}\n\nfunction linear$2() {\n  var scale = continuous(deinterpolateLinear, interpolateNumber);\n\n  scale.copy = function() {\n    return copy(scale, linear$2());\n  };\n\n  return linearish(scale);\n}\n\nfunction identity$4() {\n  var domain = [0, 1];\n\n  function scale(x) {\n    return +x;\n  }\n\n  scale.invert = scale;\n\n  scale.domain = scale.range = function(_) {\n    return arguments.length ? (domain = map$3.call(_, number$1), scale) : domain.slice();\n  };\n\n  scale.copy = function() {\n    return identity$4().domain(domain);\n  };\n\n  return linearish(scale);\n}\n\nvar nice = function(domain, interval) {\n  domain = domain.slice();\n\n  var i0 = 0,\n      i1 = domain.length - 1,\n      x0 = domain[i0],\n      x1 = domain[i1],\n      t;\n\n  if (x1 < x0) {\n    t = i0, i0 = i1, i1 = t;\n    t = x0, x0 = x1, x1 = t;\n  }\n\n  domain[i0] = interval.floor(x0);\n  domain[i1] = interval.ceil(x1);\n  return domain;\n};\n\nfunction deinterpolate(a, b) {\n  return (b = Math.log(b / a))\n      ? function(x) { return Math.log(x / a) / b; }\n      : constant$4(b);\n}\n\nfunction reinterpolate(a, b) {\n  return a < 0\n      ? function(t) { return -Math.pow(-b, t) * Math.pow(-a, 1 - t); }\n      : function(t) { return Math.pow(b, t) * Math.pow(a, 1 - t); };\n}\n\nfunction pow10(x) {\n  return isFinite(x) ? +(\"1e\" + x) : x < 0 ? 0 : x;\n}\n\nfunction powp(base) {\n  return base === 10 ? pow10\n      : base === Math.E ? Math.exp\n      : function(x) { return Math.pow(base, x); };\n}\n\nfunction logp(base) {\n  return base === Math.E ? Math.log\n      : base === 10 && Math.log10\n      || base === 2 && Math.log2\n      || (base = Math.log(base), function(x) { return Math.log(x) / base; });\n}\n\nfunction reflect(f) {\n  return function(x) {\n    return -f(-x);\n  };\n}\n\nfunction log() {\n  var scale = continuous(deinterpolate, reinterpolate).domain([1, 10]),\n      domain = scale.domain,\n      base = 10,\n      logs = logp(10),\n      pows = powp(10);\n\n  function rescale() {\n    logs = logp(base), pows = powp(base);\n    if (domain()[0] < 0) logs = reflect(logs), pows = reflect(pows);\n    return scale;\n  }\n\n  scale.base = function(_) {\n    return arguments.length ? (base = +_, rescale()) : base;\n  };\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain(_), rescale()) : domain();\n  };\n\n  scale.ticks = function(count) {\n    var d = domain(),\n        u = d[0],\n        v = d[d.length - 1],\n        r;\n\n    if (r = v < u) i = u, u = v, v = i;\n\n    var i = logs(u),\n        j = logs(v),\n        p,\n        k,\n        t,\n        n = count == null ? 10 : +count,\n        z = [];\n\n    if (!(base % 1) && j - i < n) {\n      i = Math.round(i) - 1, j = Math.round(j) + 1;\n      if (u > 0) for (; i < j; ++i) {\n        for (k = 1, p = pows(i); k < base; ++k) {\n          t = p * k;\n          if (t < u) continue;\n          if (t > v) break;\n          z.push(t);\n        }\n      } else for (; i < j; ++i) {\n        for (k = base - 1, p = pows(i); k >= 1; --k) {\n          t = p * k;\n          if (t < u) continue;\n          if (t > v) break;\n          z.push(t);\n        }\n      }\n    } else {\n      z = ticks(i, j, Math.min(j - i, n)).map(pows);\n    }\n\n    return r ? z.reverse() : z;\n  };\n\n  scale.tickFormat = function(count, specifier) {\n    if (specifier == null) specifier = base === 10 ? \".0e\" : \",\";\n    if (typeof specifier !== \"function\") specifier = exports.format(specifier);\n    if (count === Infinity) return specifier;\n    if (count == null) count = 10;\n    var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?\n    return function(d) {\n      var i = d / pows(Math.round(logs(d)));\n      if (i * base < base - 0.5) i *= base;\n      return i <= k ? specifier(d) : \"\";\n    };\n  };\n\n  scale.nice = function() {\n    return domain(nice(domain(), {\n      floor: function(x) { return pows(Math.floor(logs(x))); },\n      ceil: function(x) { return pows(Math.ceil(logs(x))); }\n    }));\n  };\n\n  scale.copy = function() {\n    return copy(scale, log().base(base));\n  };\n\n  return scale;\n}\n\nfunction raise(x, exponent) {\n  return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);\n}\n\nfunction pow() {\n  var exponent = 1,\n      scale = continuous(deinterpolate, reinterpolate),\n      domain = scale.domain;\n\n  function deinterpolate(a, b) {\n    return (b = raise(b, exponent) - (a = raise(a, exponent)))\n        ? function(x) { return (raise(x, exponent) - a) / b; }\n        : constant$4(b);\n  }\n\n  function reinterpolate(a, b) {\n    b = raise(b, exponent) - (a = raise(a, exponent));\n    return function(t) { return raise(a + b * t, 1 / exponent); };\n  }\n\n  scale.exponent = function(_) {\n    return arguments.length ? (exponent = +_, domain(domain())) : exponent;\n  };\n\n  scale.copy = function() {\n    return copy(scale, pow().exponent(exponent));\n  };\n\n  return linearish(scale);\n}\n\nfunction sqrt() {\n  return pow().exponent(0.5);\n}\n\nfunction quantile$$1() {\n  var domain = [],\n      range$$1 = [],\n      thresholds = [];\n\n  function rescale() {\n    var i = 0, n = Math.max(1, range$$1.length);\n    thresholds = new Array(n - 1);\n    while (++i < n) thresholds[i - 1] = threshold(domain, i / n);\n    return scale;\n  }\n\n  function scale(x) {\n    if (!isNaN(x = +x)) return range$$1[bisectRight(thresholds, x)];\n  }\n\n  scale.invertExtent = function(y) {\n    var i = range$$1.indexOf(y);\n    return i < 0 ? [NaN, NaN] : [\n      i > 0 ? thresholds[i - 1] : domain[0],\n      i < thresholds.length ? thresholds[i] : domain[domain.length - 1]\n    ];\n  };\n\n  scale.domain = function(_) {\n    if (!arguments.length) return domain.slice();\n    domain = [];\n    for (var i = 0, n = _.length, d; i < n; ++i) if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d);\n    domain.sort(ascending);\n    return rescale();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range$$1 = slice$3.call(_), rescale()) : range$$1.slice();\n  };\n\n  scale.quantiles = function() {\n    return thresholds.slice();\n  };\n\n  scale.copy = function() {\n    return quantile$$1()\n        .domain(domain)\n        .range(range$$1);\n  };\n\n  return scale;\n}\n\nfunction quantize$1() {\n  var x0 = 0,\n      x1 = 1,\n      n = 1,\n      domain = [0.5],\n      range$$1 = [0, 1];\n\n  function scale(x) {\n    if (x <= x) return range$$1[bisectRight(domain, x, 0, n)];\n  }\n\n  function rescale() {\n    var i = -1;\n    domain = new Array(n);\n    while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);\n    return scale;\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (n = (range$$1 = slice$3.call(_)).length - 1, rescale()) : range$$1.slice();\n  };\n\n  scale.invertExtent = function(y) {\n    var i = range$$1.indexOf(y);\n    return i < 0 ? [NaN, NaN]\n        : i < 1 ? [x0, domain[0]]\n        : i >= n ? [domain[n - 1], x1]\n        : [domain[i - 1], domain[i]];\n  };\n\n  scale.copy = function() {\n    return quantize$1()\n        .domain([x0, x1])\n        .range(range$$1);\n  };\n\n  return linearish(scale);\n}\n\nfunction threshold$1() {\n  var domain = [0.5],\n      range$$1 = [0, 1],\n      n = 1;\n\n  function scale(x) {\n    if (x <= x) return range$$1[bisectRight(domain, x, 0, n)];\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain = slice$3.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : domain.slice();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range$$1 = slice$3.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : range$$1.slice();\n  };\n\n  scale.invertExtent = function(y) {\n    var i = range$$1.indexOf(y);\n    return [domain[i - 1], domain[i]];\n  };\n\n  scale.copy = function() {\n    return threshold$1()\n        .domain(domain)\n        .range(range$$1);\n  };\n\n  return scale;\n}\n\nvar durationSecond$1 = 1000;\nvar durationMinute$1 = durationSecond$1 * 60;\nvar durationHour$1 = durationMinute$1 * 60;\nvar durationDay$1 = durationHour$1 * 24;\nvar durationWeek$1 = durationDay$1 * 7;\nvar durationMonth = durationDay$1 * 30;\nvar durationYear = durationDay$1 * 365;\n\nfunction date$1(t) {\n  return new Date(t);\n}\n\nfunction number$2(t) {\n  return t instanceof Date ? +t : +new Date(+t);\n}\n\nfunction calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format) {\n  var scale = continuous(deinterpolateLinear, interpolateNumber),\n      invert = scale.invert,\n      domain = scale.domain;\n\n  var formatMillisecond = format(\".%L\"),\n      formatSecond = format(\":%S\"),\n      formatMinute = format(\"%I:%M\"),\n      formatHour = format(\"%I %p\"),\n      formatDay = format(\"%a %d\"),\n      formatWeek = format(\"%b %d\"),\n      formatMonth = format(\"%B\"),\n      formatYear = format(\"%Y\");\n\n  var tickIntervals = [\n    [second$$1,  1,      durationSecond$1],\n    [second$$1,  5,  5 * durationSecond$1],\n    [second$$1, 15, 15 * durationSecond$1],\n    [second$$1, 30, 30 * durationSecond$1],\n    [minute$$1,  1,      durationMinute$1],\n    [minute$$1,  5,  5 * durationMinute$1],\n    [minute$$1, 15, 15 * durationMinute$1],\n    [minute$$1, 30, 30 * durationMinute$1],\n    [  hour$$1,  1,      durationHour$1  ],\n    [  hour$$1,  3,  3 * durationHour$1  ],\n    [  hour$$1,  6,  6 * durationHour$1  ],\n    [  hour$$1, 12, 12 * durationHour$1  ],\n    [   day$$1,  1,      durationDay$1   ],\n    [   day$$1,  2,  2 * durationDay$1   ],\n    [  week,  1,      durationWeek$1  ],\n    [ month$$1,  1,      durationMonth ],\n    [ month$$1,  3,  3 * durationMonth ],\n    [  year$$1,  1,      durationYear  ]\n  ];\n\n  function tickFormat(date) {\n    return (second$$1(date) < date ? formatMillisecond\n        : minute$$1(date) < date ? formatSecond\n        : hour$$1(date) < date ? formatMinute\n        : day$$1(date) < date ? formatHour\n        : month$$1(date) < date ? (week(date) < date ? formatDay : formatWeek)\n        : year$$1(date) < date ? formatMonth\n        : formatYear)(date);\n  }\n\n  function tickInterval(interval, start, stop, step) {\n    if (interval == null) interval = 10;\n\n    // If a desired tick count is specified, pick a reasonable tick interval\n    // based on the extent of the domain and a rough estimate of tick size.\n    // Otherwise, assume interval is already a time interval and use it.\n    if (typeof interval === \"number\") {\n      var target = Math.abs(stop - start) / interval,\n          i = bisector(function(i) { return i[2]; }).right(tickIntervals, target);\n      if (i === tickIntervals.length) {\n        step = tickStep(start / durationYear, stop / durationYear, interval);\n        interval = year$$1;\n      } else if (i) {\n        i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];\n        step = i[1];\n        interval = i[0];\n      } else {\n        step = tickStep(start, stop, interval);\n        interval = millisecond$$1;\n      }\n    }\n\n    return step == null ? interval : interval.every(step);\n  }\n\n  scale.invert = function(y) {\n    return new Date(invert(y));\n  };\n\n  scale.domain = function(_) {\n    return arguments.length ? domain(map$3.call(_, number$2)) : domain().map(date$1);\n  };\n\n  scale.ticks = function(interval, step) {\n    var d = domain(),\n        t0 = d[0],\n        t1 = d[d.length - 1],\n        r = t1 < t0,\n        t;\n    if (r) t = t0, t0 = t1, t1 = t;\n    t = tickInterval(interval, t0, t1, step);\n    t = t ? t.range(t0, t1 + 1) : []; // inclusive stop\n    return r ? t.reverse() : t;\n  };\n\n  scale.tickFormat = function(count, specifier) {\n    return specifier == null ? tickFormat : format(specifier);\n  };\n\n  scale.nice = function(interval, step) {\n    var d = domain();\n    return (interval = tickInterval(interval, d[0], d[d.length - 1], step))\n        ? domain(nice(d, interval))\n        : scale;\n  };\n\n  scale.copy = function() {\n    return copy(scale, calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format));\n  };\n\n  return scale;\n}\n\nvar time = function() {\n  return calendar(year, month, sunday, day, hour, minute, second, millisecond, exports.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]);\n};\n\nvar utcTime = function() {\n  return calendar(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute, second, millisecond, exports.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]);\n};\n\nvar colors = function(s) {\n  return s.match(/.{6}/g).map(function(x) {\n    return \"#\" + x;\n  });\n};\n\nvar category10 = colors(\"1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf\");\n\nvar category20b = colors(\"393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6\");\n\nvar category20c = colors(\"3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9\");\n\nvar category20 = colors(\"1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5\");\n\nvar cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));\n\nvar warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));\n\nvar cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8));\n\nvar rainbow = cubehelix();\n\nvar rainbow$1 = function(t) {\n  if (t < 0 || t > 1) t -= Math.floor(t);\n  var ts = Math.abs(t - 0.5);\n  rainbow.h = 360 * t - 100;\n  rainbow.s = 1.5 - 1.5 * ts;\n  rainbow.l = 0.8 - 0.9 * ts;\n  return rainbow + \"\";\n};\n\nfunction ramp(range) {\n  var n = range.length;\n  return function(t) {\n    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];\n  };\n}\n\nvar viridis = ramp(colors(\"44015444025645045745055946075a46085c460a5d460b5e470d60470e6147106347116447136548146748166848176948186a481a6c481b6d481c6e481d6f481f70482071482173482374482475482576482677482878482979472a7a472c7a472d7b472e7c472f7d46307e46327e46337f463480453581453781453882443983443a83443b84433d84433e85423f854240864241864142874144874045884046883f47883f48893e49893e4a893e4c8a3d4d8a3d4e8a3c4f8a3c508b3b518b3b528b3a538b3a548c39558c39568c38588c38598c375a8c375b8d365c8d365d8d355e8d355f8d34608d34618d33628d33638d32648e32658e31668e31678e31688e30698e306a8e2f6b8e2f6c8e2e6d8e2e6e8e2e6f8e2d708e2d718e2c718e2c728e2c738e2b748e2b758e2a768e2a778e2a788e29798e297a8e297b8e287c8e287d8e277e8e277f8e27808e26818e26828e26828e25838e25848e25858e24868e24878e23888e23898e238a8d228b8d228c8d228d8d218e8d218f8d21908d21918c20928c20928c20938c1f948c1f958b1f968b1f978b1f988b1f998a1f9a8a1e9b8a1e9c891e9d891f9e891f9f881fa0881fa1881fa1871fa28720a38620a48621a58521a68522a78522a88423a98324aa8325ab8225ac8226ad8127ad8128ae8029af7f2ab07f2cb17e2db27d2eb37c2fb47c31b57b32b67a34b67935b77937b87838b9773aba763bbb753dbc743fbc7340bd7242be7144bf7046c06f48c16e4ac16d4cc26c4ec36b50c46a52c56954c56856c66758c7655ac8645cc8635ec96260ca6063cb5f65cb5e67cc5c69cd5b6ccd5a6ece5870cf5773d05675d05477d1537ad1517cd2507fd34e81d34d84d44b86d54989d5488bd6468ed64590d74393d74195d84098d83e9bd93c9dd93ba0da39a2da37a5db36a8db34aadc32addc30b0dd2fb2dd2db5de2bb8de29bade28bddf26c0df25c2df23c5e021c8e020cae11fcde11dd0e11cd2e21bd5e21ad8e219dae319dde318dfe318e2e418e5e419e7e419eae51aece51befe51cf1e51df4e61ef6e620f8e621fbe723fde725\"));\n\nvar magma = ramp(colors(\"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\"));\n\nvar inferno = ramp(colors(\"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\"));\n\nvar plasma = ramp(colors(\"0d088710078813078916078a19068c1b068d1d068e20068f2206902406912605912805922a05932c05942e05952f059631059733059735049837049938049a3a049a3c049b3e049c3f049c41049d43039e44039e46039f48039f4903a04b03a14c02a14e02a25002a25102a35302a35502a45601a45801a45901a55b01a55c01a65e01a66001a66100a76300a76400a76600a76700a86900a86a00a86c00a86e00a86f00a87100a87201a87401a87501a87701a87801a87a02a87b02a87d03a87e03a88004a88104a78305a78405a78606a68707a68808a68a09a58b0aa58d0ba58e0ca48f0da4910ea3920fa39410a29511a19613a19814a099159f9a169f9c179e9d189d9e199da01a9ca11b9ba21d9aa31e9aa51f99a62098a72197a82296aa2395ab2494ac2694ad2793ae2892b02991b12a90b22b8fb32c8eb42e8db52f8cb6308bb7318ab83289ba3388bb3488bc3587bd3786be3885bf3984c03a83c13b82c23c81c33d80c43e7fc5407ec6417dc7427cc8437bc9447aca457acb4679cc4778cc4977cd4a76ce4b75cf4c74d04d73d14e72d24f71d35171d45270d5536fd5546ed6556dd7566cd8576bd9586ada5a6ada5b69db5c68dc5d67dd5e66de5f65de6164df6263e06363e16462e26561e26660e3685fe4695ee56a5de56b5de66c5ce76e5be76f5ae87059e97158e97257ea7457eb7556eb7655ec7754ed7953ed7a52ee7b51ef7c51ef7e50f07f4ff0804ef1814df1834cf2844bf3854bf3874af48849f48948f58b47f58c46f68d45f68f44f79044f79143f79342f89441f89540f9973ff9983ef99a3efa9b3dfa9c3cfa9e3bfb9f3afba139fba238fca338fca537fca636fca835fca934fdab33fdac33fdae32fdaf31fdb130fdb22ffdb42ffdb52efeb72dfeb82cfeba2cfebb2bfebd2afebe2afec029fdc229fdc328fdc527fdc627fdc827fdca26fdcb26fccd25fcce25fcd025fcd225fbd324fbd524fbd724fad824fada24f9dc24f9dd25f8df25f8e125f7e225f7e425f6e626f6e826f5e926f5eb27f4ed27f3ee27f3f027f2f227f1f426f1f525f0f724f0f921\"));\n\nfunction sequential(interpolator) {\n  var x0 = 0,\n      x1 = 1,\n      clamp = false;\n\n  function scale(x) {\n    var t = (x - x0) / (x1 - x0);\n    return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (x0 = +_[0], x1 = +_[1], scale) : [x0, x1];\n  };\n\n  scale.clamp = function(_) {\n    return arguments.length ? (clamp = !!_, scale) : clamp;\n  };\n\n  scale.interpolator = function(_) {\n    return arguments.length ? (interpolator = _, scale) : interpolator;\n  };\n\n  scale.copy = function() {\n    return sequential(interpolator).domain([x0, x1]).clamp(clamp);\n  };\n\n  return linearish(scale);\n}\n\nvar xhtml = \"http://www.w3.org/1999/xhtml\";\n\nvar namespaces = {\n  svg: \"http://www.w3.org/2000/svg\",\n  xhtml: xhtml,\n  xlink: \"http://www.w3.org/1999/xlink\",\n  xml: \"http://www.w3.org/XML/1998/namespace\",\n  xmlns: \"http://www.w3.org/2000/xmlns/\"\n};\n\nvar namespace = function(name) {\n  var prefix = name += \"\", i = prefix.indexOf(\":\");\n  if (i >= 0 && (prefix = name.slice(0, i)) !== \"xmlns\") name = name.slice(i + 1);\n  return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;\n};\n\nfunction creatorInherit(name) {\n  return function() {\n    var document = this.ownerDocument,\n        uri = this.namespaceURI;\n    return uri === xhtml && document.documentElement.namespaceURI === xhtml\n        ? document.createElement(name)\n        : document.createElementNS(uri, name);\n  };\n}\n\nfunction creatorFixed(fullname) {\n  return function() {\n    return this.ownerDocument.createElementNS(fullname.space, fullname.local);\n  };\n}\n\nvar creator = function(name) {\n  var fullname = namespace(name);\n  return (fullname.local\n      ? creatorFixed\n      : creatorInherit)(fullname);\n};\n\nvar nextId = 0;\n\nfunction local() {\n  return new Local;\n}\n\nfunction Local() {\n  this._ = \"@\" + (++nextId).toString(36);\n}\n\nLocal.prototype = local.prototype = {\n  constructor: Local,\n  get: function(node) {\n    var id = this._;\n    while (!(id in node)) if (!(node = node.parentNode)) return;\n    return node[id];\n  },\n  set: function(node, value) {\n    return node[this._] = value;\n  },\n  remove: function(node) {\n    return this._ in node && delete node[this._];\n  },\n  toString: function() {\n    return this._;\n  }\n};\n\nvar matcher = function(selector) {\n  return function() {\n    return this.matches(selector);\n  };\n};\n\nif (typeof document !== \"undefined\") {\n  var element = document.documentElement;\n  if (!element.matches) {\n    var vendorMatches = element.webkitMatchesSelector\n        || element.msMatchesSelector\n        || element.mozMatchesSelector\n        || element.oMatchesSelector;\n    matcher = function(selector) {\n      return function() {\n        return vendorMatches.call(this, selector);\n      };\n    };\n  }\n}\n\nvar matcher$1 = matcher;\n\nvar filterEvents = {};\n\nexports.event = null;\n\nif (typeof document !== \"undefined\") {\n  var element$1 = document.documentElement;\n  if (!(\"onmouseenter\" in element$1)) {\n    filterEvents = {mouseenter: \"mouseover\", mouseleave: \"mouseout\"};\n  }\n}\n\nfunction filterContextListener(listener, index, group) {\n  listener = contextListener(listener, index, group);\n  return function(event) {\n    var related = event.relatedTarget;\n    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {\n      listener.call(this, event);\n    }\n  };\n}\n\nfunction contextListener(listener, index, group) {\n  return function(event1) {\n    var event0 = exports.event; // Events can be reentrant (e.g., focus).\n    exports.event = event1;\n    try {\n      listener.call(this, this.__data__, index, group);\n    } finally {\n      exports.event = event0;\n    }\n  };\n}\n\nfunction parseTypenames$1(typenames) {\n  return typenames.trim().split(/^|\\s+/).map(function(t) {\n    var name = \"\", i = t.indexOf(\".\");\n    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);\n    return {type: t, name: name};\n  });\n}\n\nfunction onRemove(typename) {\n  return function() {\n    var on = this.__on;\n    if (!on) return;\n    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {\n      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {\n        this.removeEventListener(o.type, o.listener, o.capture);\n      } else {\n        on[++i] = o;\n      }\n    }\n    if (++i) on.length = i;\n    else delete this.__on;\n  };\n}\n\nfunction onAdd(typename, value, capture) {\n  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;\n  return function(d, i, group) {\n    var on = this.__on, o, listener = wrap(value, i, group);\n    if (on) for (var j = 0, m = on.length; j < m; ++j) {\n      if ((o = on[j]).type === typename.type && o.name === typename.name) {\n        this.removeEventListener(o.type, o.listener, o.capture);\n        this.addEventListener(o.type, o.listener = listener, o.capture = capture);\n        o.value = value;\n        return;\n      }\n    }\n    this.addEventListener(typename.type, listener, capture);\n    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};\n    if (!on) this.__on = [o];\n    else on.push(o);\n  };\n}\n\nvar selection_on = function(typename, value, capture) {\n  var typenames = parseTypenames$1(typename + \"\"), i, n = typenames.length, t;\n\n  if (arguments.length < 2) {\n    var on = this.node().__on;\n    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {\n      for (i = 0, o = on[j]; i < n; ++i) {\n        if ((t = typenames[i]).type === o.type && t.name === o.name) {\n          return o.value;\n        }\n      }\n    }\n    return;\n  }\n\n  on = value ? onAdd : onRemove;\n  if (capture == null) capture = false;\n  for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));\n  return this;\n};\n\nfunction customEvent(event1, listener, that, args) {\n  var event0 = exports.event;\n  event1.sourceEvent = exports.event;\n  exports.event = event1;\n  try {\n    return listener.apply(that, args);\n  } finally {\n    exports.event = event0;\n  }\n}\n\nvar sourceEvent = function() {\n  var current = exports.event, source;\n  while (source = current.sourceEvent) current = source;\n  return current;\n};\n\nvar point$5 = function(node, event) {\n  var svg = node.ownerSVGElement || node;\n\n  if (svg.createSVGPoint) {\n    var point = svg.createSVGPoint();\n    point.x = event.clientX, point.y = event.clientY;\n    point = point.matrixTransform(node.getScreenCTM().inverse());\n    return [point.x, point.y];\n  }\n\n  var rect = node.getBoundingClientRect();\n  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];\n};\n\nvar mouse = function(node) {\n  var event = sourceEvent();\n  if (event.changedTouches) event = event.changedTouches[0];\n  return point$5(node, event);\n};\n\nfunction none$2() {}\n\nvar selector = function(selector) {\n  return selector == null ? none$2 : function() {\n    return this.querySelector(selector);\n  };\n};\n\nvar selection_select = function(select) {\n  if (typeof select !== \"function\") select = selector(select);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {\n      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {\n        if (\"__data__\" in node) subnode.__data__ = node.__data__;\n        subgroup[i] = subnode;\n      }\n    }\n  }\n\n  return new Selection(subgroups, this._parents);\n};\n\nfunction empty() {\n  return [];\n}\n\nvar selectorAll = function(selector) {\n  return selector == null ? empty : function() {\n    return this.querySelectorAll(selector);\n  };\n};\n\nvar selection_selectAll = function(select) {\n  if (typeof select !== \"function\") select = selectorAll(select);\n\n  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        subgroups.push(select.call(node, node.__data__, i, group));\n        parents.push(node);\n      }\n    }\n  }\n\n  return new Selection(subgroups, parents);\n};\n\nvar selection_filter = function(match) {\n  if (typeof match !== \"function\") match = matcher$1(match);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {\n      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {\n        subgroup.push(node);\n      }\n    }\n  }\n\n  return new Selection(subgroups, this._parents);\n};\n\nvar sparse = function(update) {\n  return new Array(update.length);\n};\n\nvar selection_enter = function() {\n  return new Selection(this._enter || this._groups.map(sparse), this._parents);\n};\n\nfunction EnterNode(parent, datum) {\n  this.ownerDocument = parent.ownerDocument;\n  this.namespaceURI = parent.namespaceURI;\n  this._next = null;\n  this._parent = parent;\n  this.__data__ = datum;\n}\n\nEnterNode.prototype = {\n  constructor: EnterNode,\n  appendChild: function(child) { return this._parent.insertBefore(child, this._next); },\n  insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },\n  querySelector: function(selector) { return this._parent.querySelector(selector); },\n  querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }\n};\n\nvar constant$5 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar keyPrefix = \"$\"; // Protect against keys like “__proto__”.\n\nfunction bindIndex(parent, group, enter, update, exit, data) {\n  var i = 0,\n      node,\n      groupLength = group.length,\n      dataLength = data.length;\n\n  // Put any non-null nodes that fit into update.\n  // Put any null nodes into enter.\n  // Put any remaining data into enter.\n  for (; i < dataLength; ++i) {\n    if (node = group[i]) {\n      node.__data__ = data[i];\n      update[i] = node;\n    } else {\n      enter[i] = new EnterNode(parent, data[i]);\n    }\n  }\n\n  // Put any non-null nodes that don’t fit into exit.\n  for (; i < groupLength; ++i) {\n    if (node = group[i]) {\n      exit[i] = node;\n    }\n  }\n}\n\nfunction bindKey(parent, group, enter, update, exit, data, key) {\n  var i,\n      node,\n      nodeByKeyValue = {},\n      groupLength = group.length,\n      dataLength = data.length,\n      keyValues = new Array(groupLength),\n      keyValue;\n\n  // Compute the key for each node.\n  // If multiple nodes have the same key, the duplicates are added to exit.\n  for (i = 0; i < groupLength; ++i) {\n    if (node = group[i]) {\n      keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);\n      if (keyValue in nodeByKeyValue) {\n        exit[i] = node;\n      } else {\n        nodeByKeyValue[keyValue] = node;\n      }\n    }\n  }\n\n  // Compute the key for each datum.\n  // If there a node associated with this key, join and add it to update.\n  // If there is not (or the key is a duplicate), add it to enter.\n  for (i = 0; i < dataLength; ++i) {\n    keyValue = keyPrefix + key.call(parent, data[i], i, data);\n    if (node = nodeByKeyValue[keyValue]) {\n      update[i] = node;\n      node.__data__ = data[i];\n      nodeByKeyValue[keyValue] = null;\n    } else {\n      enter[i] = new EnterNode(parent, data[i]);\n    }\n  }\n\n  // Add any remaining nodes that were not bound to data to exit.\n  for (i = 0; i < groupLength; ++i) {\n    if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {\n      exit[i] = node;\n    }\n  }\n}\n\nvar selection_data = function(value, key) {\n  if (!value) {\n    data = new Array(this.size()), j = -1;\n    this.each(function(d) { data[++j] = d; });\n    return data;\n  }\n\n  var bind = key ? bindKey : bindIndex,\n      parents = this._parents,\n      groups = this._groups;\n\n  if (typeof value !== \"function\") value = constant$5(value);\n\n  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {\n    var parent = parents[j],\n        group = groups[j],\n        groupLength = group.length,\n        data = value.call(parent, parent && parent.__data__, j, parents),\n        dataLength = data.length,\n        enterGroup = enter[j] = new Array(dataLength),\n        updateGroup = update[j] = new Array(dataLength),\n        exitGroup = exit[j] = new Array(groupLength);\n\n    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);\n\n    // Now connect the enter nodes to their following update node, such that\n    // appendChild can insert the materialized enter node before this node,\n    // rather than at the end of the parent node.\n    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {\n      if (previous = enterGroup[i0]) {\n        if (i0 >= i1) i1 = i0 + 1;\n        while (!(next = updateGroup[i1]) && ++i1 < dataLength);\n        previous._next = next || null;\n      }\n    }\n  }\n\n  update = new Selection(update, parents);\n  update._enter = enter;\n  update._exit = exit;\n  return update;\n};\n\nvar selection_exit = function() {\n  return new Selection(this._exit || this._groups.map(sparse), this._parents);\n};\n\nvar selection_merge = function(selection) {\n\n  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {\n    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {\n      if (node = group0[i] || group1[i]) {\n        merge[i] = node;\n      }\n    }\n  }\n\n  for (; j < m0; ++j) {\n    merges[j] = groups0[j];\n  }\n\n  return new Selection(merges, this._parents);\n};\n\nvar selection_order = function() {\n\n  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {\n    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {\n      if (node = group[i]) {\n        if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);\n        next = node;\n      }\n    }\n  }\n\n  return this;\n};\n\nvar selection_sort = function(compare) {\n  if (!compare) compare = ascending$2;\n\n  function compareNode(a, b) {\n    return a && b ? compare(a.__data__, b.__data__) : !a - !b;\n  }\n\n  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        sortgroup[i] = node;\n      }\n    }\n    sortgroup.sort(compareNode);\n  }\n\n  return new Selection(sortgroups, this._parents).order();\n};\n\nfunction ascending$2(a, b) {\n  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;\n}\n\nvar selection_call = function() {\n  var callback = arguments[0];\n  arguments[0] = this;\n  callback.apply(null, arguments);\n  return this;\n};\n\nvar selection_nodes = function() {\n  var nodes = new Array(this.size()), i = -1;\n  this.each(function() { nodes[++i] = this; });\n  return nodes;\n};\n\nvar selection_node = function() {\n\n  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {\n    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {\n      var node = group[i];\n      if (node) return node;\n    }\n  }\n\n  return null;\n};\n\nvar selection_size = function() {\n  var size = 0;\n  this.each(function() { ++size; });\n  return size;\n};\n\nvar selection_empty = function() {\n  return !this.node();\n};\n\nvar selection_each = function(callback) {\n\n  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {\n    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {\n      if (node = group[i]) callback.call(node, node.__data__, i, group);\n    }\n  }\n\n  return this;\n};\n\nfunction attrRemove(name) {\n  return function() {\n    this.removeAttribute(name);\n  };\n}\n\nfunction attrRemoveNS(fullname) {\n  return function() {\n    this.removeAttributeNS(fullname.space, fullname.local);\n  };\n}\n\nfunction attrConstant(name, value) {\n  return function() {\n    this.setAttribute(name, value);\n  };\n}\n\nfunction attrConstantNS(fullname, value) {\n  return function() {\n    this.setAttributeNS(fullname.space, fullname.local, value);\n  };\n}\n\nfunction attrFunction(name, value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) this.removeAttribute(name);\n    else this.setAttribute(name, v);\n  };\n}\n\nfunction attrFunctionNS(fullname, value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) this.removeAttributeNS(fullname.space, fullname.local);\n    else this.setAttributeNS(fullname.space, fullname.local, v);\n  };\n}\n\nvar selection_attr = function(name, value) {\n  var fullname = namespace(name);\n\n  if (arguments.length < 2) {\n    var node = this.node();\n    return fullname.local\n        ? node.getAttributeNS(fullname.space, fullname.local)\n        : node.getAttribute(fullname);\n  }\n\n  return this.each((value == null\n      ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === \"function\"\n      ? (fullname.local ? attrFunctionNS : attrFunction)\n      : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));\n};\n\nvar window = function(node) {\n  return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node\n      || (node.document && node) // node is a Window\n      || node.defaultView; // node is a Document\n};\n\nfunction styleRemove(name) {\n  return function() {\n    this.style.removeProperty(name);\n  };\n}\n\nfunction styleConstant(name, value, priority) {\n  return function() {\n    this.style.setProperty(name, value, priority);\n  };\n}\n\nfunction styleFunction(name, value, priority) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) this.style.removeProperty(name);\n    else this.style.setProperty(name, v, priority);\n  };\n}\n\nvar selection_style = function(name, value, priority) {\n  var node;\n  return arguments.length > 1\n      ? this.each((value == null\n            ? styleRemove : typeof value === \"function\"\n            ? styleFunction\n            : styleConstant)(name, value, priority == null ? \"\" : priority))\n      : window(node = this.node())\n          .getComputedStyle(node, null)\n          .getPropertyValue(name);\n};\n\nfunction propertyRemove(name) {\n  return function() {\n    delete this[name];\n  };\n}\n\nfunction propertyConstant(name, value) {\n  return function() {\n    this[name] = value;\n  };\n}\n\nfunction propertyFunction(name, value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) delete this[name];\n    else this[name] = v;\n  };\n}\n\nvar selection_property = function(name, value) {\n  return arguments.length > 1\n      ? this.each((value == null\n          ? propertyRemove : typeof value === \"function\"\n          ? propertyFunction\n          : propertyConstant)(name, value))\n      : this.node()[name];\n};\n\nfunction classArray(string) {\n  return string.trim().split(/^|\\s+/);\n}\n\nfunction classList(node) {\n  return node.classList || new ClassList(node);\n}\n\nfunction ClassList(node) {\n  this._node = node;\n  this._names = classArray(node.getAttribute(\"class\") || \"\");\n}\n\nClassList.prototype = {\n  add: function(name) {\n    var i = this._names.indexOf(name);\n    if (i < 0) {\n      this._names.push(name);\n      this._node.setAttribute(\"class\", this._names.join(\" \"));\n    }\n  },\n  remove: function(name) {\n    var i = this._names.indexOf(name);\n    if (i >= 0) {\n      this._names.splice(i, 1);\n      this._node.setAttribute(\"class\", this._names.join(\" \"));\n    }\n  },\n  contains: function(name) {\n    return this._names.indexOf(name) >= 0;\n  }\n};\n\nfunction classedAdd(node, names) {\n  var list = classList(node), i = -1, n = names.length;\n  while (++i < n) list.add(names[i]);\n}\n\nfunction classedRemove(node, names) {\n  var list = classList(node), i = -1, n = names.length;\n  while (++i < n) list.remove(names[i]);\n}\n\nfunction classedTrue(names) {\n  return function() {\n    classedAdd(this, names);\n  };\n}\n\nfunction classedFalse(names) {\n  return function() {\n    classedRemove(this, names);\n  };\n}\n\nfunction classedFunction(names, value) {\n  return function() {\n    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);\n  };\n}\n\nvar selection_classed = function(name, value) {\n  var names = classArray(name + \"\");\n\n  if (arguments.length < 2) {\n    var list = classList(this.node()), i = -1, n = names.length;\n    while (++i < n) if (!list.contains(names[i])) return false;\n    return true;\n  }\n\n  return this.each((typeof value === \"function\"\n      ? classedFunction : value\n      ? classedTrue\n      : classedFalse)(names, value));\n};\n\nfunction textRemove() {\n  this.textContent = \"\";\n}\n\nfunction textConstant(value) {\n  return function() {\n    this.textContent = value;\n  };\n}\n\nfunction textFunction(value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    this.textContent = v == null ? \"\" : v;\n  };\n}\n\nvar selection_text = function(value) {\n  return arguments.length\n      ? this.each(value == null\n          ? textRemove : (typeof value === \"function\"\n          ? textFunction\n          : textConstant)(value))\n      : this.node().textContent;\n};\n\nfunction htmlRemove() {\n  this.innerHTML = \"\";\n}\n\nfunction htmlConstant(value) {\n  return function() {\n    this.innerHTML = value;\n  };\n}\n\nfunction htmlFunction(value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    this.innerHTML = v == null ? \"\" : v;\n  };\n}\n\nvar selection_html = function(value) {\n  return arguments.length\n      ? this.each(value == null\n          ? htmlRemove : (typeof value === \"function\"\n          ? htmlFunction\n          : htmlConstant)(value))\n      : this.node().innerHTML;\n};\n\nfunction raise$1() {\n  if (this.nextSibling) this.parentNode.appendChild(this);\n}\n\nvar selection_raise = function() {\n  return this.each(raise$1);\n};\n\nfunction lower() {\n  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);\n}\n\nvar selection_lower = function() {\n  return this.each(lower);\n};\n\nvar selection_append = function(name) {\n  var create = typeof name === \"function\" ? name : creator(name);\n  return this.select(function() {\n    return this.appendChild(create.apply(this, arguments));\n  });\n};\n\nfunction constantNull() {\n  return null;\n}\n\nvar selection_insert = function(name, before) {\n  var create = typeof name === \"function\" ? name : creator(name),\n      select = before == null ? constantNull : typeof before === \"function\" ? before : selector(before);\n  return this.select(function() {\n    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);\n  });\n};\n\nfunction remove() {\n  var parent = this.parentNode;\n  if (parent) parent.removeChild(this);\n}\n\nvar selection_remove = function() {\n  return this.each(remove);\n};\n\nvar selection_datum = function(value) {\n  return arguments.length\n      ? this.property(\"__data__\", value)\n      : this.node().__data__;\n};\n\nfunction dispatchEvent(node, type, params) {\n  var window$$1 = window(node),\n      event = window$$1.CustomEvent;\n\n  if (event) {\n    event = new event(type, params);\n  } else {\n    event = window$$1.document.createEvent(\"Event\");\n    if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;\n    else event.initEvent(type, false, false);\n  }\n\n  node.dispatchEvent(event);\n}\n\nfunction dispatchConstant(type, params) {\n  return function() {\n    return dispatchEvent(this, type, params);\n  };\n}\n\nfunction dispatchFunction(type, params) {\n  return function() {\n    return dispatchEvent(this, type, params.apply(this, arguments));\n  };\n}\n\nvar selection_dispatch = function(type, params) {\n  return this.each((typeof params === \"function\"\n      ? dispatchFunction\n      : dispatchConstant)(type, params));\n};\n\nvar root = [null];\n\nfunction Selection(groups, parents) {\n  this._groups = groups;\n  this._parents = parents;\n}\n\nfunction selection() {\n  return new Selection([[document.documentElement]], root);\n}\n\nSelection.prototype = selection.prototype = {\n  constructor: Selection,\n  select: selection_select,\n  selectAll: selection_selectAll,\n  filter: selection_filter,\n  data: selection_data,\n  enter: selection_enter,\n  exit: selection_exit,\n  merge: selection_merge,\n  order: selection_order,\n  sort: selection_sort,\n  call: selection_call,\n  nodes: selection_nodes,\n  node: selection_node,\n  size: selection_size,\n  empty: selection_empty,\n  each: selection_each,\n  attr: selection_attr,\n  style: selection_style,\n  property: selection_property,\n  classed: selection_classed,\n  text: selection_text,\n  html: selection_html,\n  raise: selection_raise,\n  lower: selection_lower,\n  append: selection_append,\n  insert: selection_insert,\n  remove: selection_remove,\n  datum: selection_datum,\n  on: selection_on,\n  dispatch: selection_dispatch\n};\n\nvar select = function(selector) {\n  return typeof selector === \"string\"\n      ? new Selection([[document.querySelector(selector)]], [document.documentElement])\n      : new Selection([[selector]], root);\n};\n\nvar selectAll = function(selector) {\n  return typeof selector === \"string\"\n      ? new Selection([document.querySelectorAll(selector)], [document.documentElement])\n      : new Selection([selector == null ? [] : selector], root);\n};\n\nvar touch = function(node, touches, identifier) {\n  if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;\n\n  for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {\n    if ((touch = touches[i]).identifier === identifier) {\n      return point$5(node, touch);\n    }\n  }\n\n  return null;\n};\n\nvar touches = function(node, touches) {\n  if (touches == null) touches = sourceEvent().touches;\n\n  for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {\n    points[i] = point$5(node, touches[i]);\n  }\n\n  return points;\n};\n\nvar emptyOn = dispatch(\"start\", \"end\", \"interrupt\");\nvar emptyTween = [];\n\nvar CREATED = 0;\nvar SCHEDULED = 1;\nvar STARTING = 2;\nvar STARTED = 3;\nvar RUNNING = 4;\nvar ENDING = 5;\nvar ENDED = 6;\n\nvar schedule = function(node, name, id, index, group, timing) {\n  var schedules = node.__transition;\n  if (!schedules) node.__transition = {};\n  else if (id in schedules) return;\n  create(node, id, {\n    name: name,\n    index: index, // For context during callback.\n    group: group, // For context during callback.\n    on: emptyOn,\n    tween: emptyTween,\n    time: timing.time,\n    delay: timing.delay,\n    duration: timing.duration,\n    ease: timing.ease,\n    timer: null,\n    state: CREATED\n  });\n};\n\nfunction init(node, id) {\n  var schedule = node.__transition;\n  if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error(\"too late\");\n  return schedule;\n}\n\nfunction set$3(node, id) {\n  var schedule = node.__transition;\n  if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error(\"too late\");\n  return schedule;\n}\n\nfunction get$1(node, id) {\n  var schedule = node.__transition;\n  if (!schedule || !(schedule = schedule[id])) throw new Error(\"too late\");\n  return schedule;\n}\n\nfunction create(node, id, self) {\n  var schedules = node.__transition,\n      tween;\n\n  // Initialize the self timer when the transition is created.\n  // Note the actual delay is not known until the first callback!\n  schedules[id] = self;\n  self.timer = timer(schedule, 0, self.time);\n\n  function schedule(elapsed) {\n    self.state = SCHEDULED;\n    self.timer.restart(start, self.delay, self.time);\n\n    // If the elapsed delay is less than our first sleep, start immediately.\n    if (self.delay <= elapsed) start(elapsed - self.delay);\n  }\n\n  function start(elapsed) {\n    var i, j, n, o;\n\n    // If the state is not SCHEDULED, then we previously errored on start.\n    if (self.state !== SCHEDULED) return stop();\n\n    for (i in schedules) {\n      o = schedules[i];\n      if (o.name !== self.name) continue;\n\n      // While this element already has a starting transition during this frame,\n      // defer starting an interrupting transition until that transition has a\n      // chance to tick (and possibly end); see d3/d3-transition#54!\n      if (o.state === STARTED) return timeout$1(start);\n\n      // Interrupt the active transition, if any.\n      // Dispatch the interrupt event.\n      if (o.state === RUNNING) {\n        o.state = ENDED;\n        o.timer.stop();\n        o.on.call(\"interrupt\", node, node.__data__, o.index, o.group);\n        delete schedules[i];\n      }\n\n      // Cancel any pre-empted transitions. No interrupt event is dispatched\n      // because the cancelled transitions never started. Note that this also\n      // removes this transition from the pending list!\n      else if (+i < id) {\n        o.state = ENDED;\n        o.timer.stop();\n        delete schedules[i];\n      }\n    }\n\n    // Defer the first tick to end of the current frame; see d3/d3#1576.\n    // Note the transition may be canceled after start and before the first tick!\n    // Note this must be scheduled before the start event; see d3/d3-transition#16!\n    // Assuming this is successful, subsequent callbacks go straight to tick.\n    timeout$1(function() {\n      if (self.state === STARTED) {\n        self.state = RUNNING;\n        self.timer.restart(tick, self.delay, self.time);\n        tick(elapsed);\n      }\n    });\n\n    // Dispatch the start event.\n    // Note this must be done before the tween are initialized.\n    self.state = STARTING;\n    self.on.call(\"start\", node, node.__data__, self.index, self.group);\n    if (self.state !== STARTING) return; // interrupted\n    self.state = STARTED;\n\n    // Initialize the tween, deleting null tween.\n    tween = new Array(n = self.tween.length);\n    for (i = 0, j = -1; i < n; ++i) {\n      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {\n        tween[++j] = o;\n      }\n    }\n    tween.length = j + 1;\n  }\n\n  function tick(elapsed) {\n    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),\n        i = -1,\n        n = tween.length;\n\n    while (++i < n) {\n      tween[i].call(null, t);\n    }\n\n    // Dispatch the end event.\n    if (self.state === ENDING) {\n      self.on.call(\"end\", node, node.__data__, self.index, self.group);\n      stop();\n    }\n  }\n\n  function stop() {\n    self.state = ENDED;\n    self.timer.stop();\n    delete schedules[id];\n    for (var i in schedules) return; // eslint-disable-line no-unused-vars\n    delete node.__transition;\n  }\n}\n\nvar interrupt = function(node, name) {\n  var schedules = node.__transition,\n      schedule,\n      active,\n      empty = true,\n      i;\n\n  if (!schedules) return;\n\n  name = name == null ? null : name + \"\";\n\n  for (i in schedules) {\n    if ((schedule = schedules[i]).name !== name) { empty = false; continue; }\n    active = schedule.state > STARTING && schedule.state < ENDING;\n    schedule.state = ENDED;\n    schedule.timer.stop();\n    if (active) schedule.on.call(\"interrupt\", node, node.__data__, schedule.index, schedule.group);\n    delete schedules[i];\n  }\n\n  if (empty) delete node.__transition;\n};\n\nvar selection_interrupt = function(name) {\n  return this.each(function() {\n    interrupt(this, name);\n  });\n};\n\nfunction tweenRemove(id, name) {\n  var tween0, tween1;\n  return function() {\n    var schedule = set$3(this, id),\n        tween = schedule.tween;\n\n    // If this node shared tween with the previous node,\n    // just assign the updated shared tween and we’re done!\n    // Otherwise, copy-on-write.\n    if (tween !== tween0) {\n      tween1 = tween0 = tween;\n      for (var i = 0, n = tween1.length; i < n; ++i) {\n        if (tween1[i].name === name) {\n          tween1 = tween1.slice();\n          tween1.splice(i, 1);\n          break;\n        }\n      }\n    }\n\n    schedule.tween = tween1;\n  };\n}\n\nfunction tweenFunction(id, name, value) {\n  var tween0, tween1;\n  if (typeof value !== \"function\") throw new Error;\n  return function() {\n    var schedule = set$3(this, id),\n        tween = schedule.tween;\n\n    // If this node shared tween with the previous node,\n    // just assign the updated shared tween and we’re done!\n    // Otherwise, copy-on-write.\n    if (tween !== tween0) {\n      tween1 = (tween0 = tween).slice();\n      for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {\n        if (tween1[i].name === name) {\n          tween1[i] = t;\n          break;\n        }\n      }\n      if (i === n) tween1.push(t);\n    }\n\n    schedule.tween = tween1;\n  };\n}\n\nvar transition_tween = function(name, value) {\n  var id = this._id;\n\n  name += \"\";\n\n  if (arguments.length < 2) {\n    var tween = get$1(this.node(), id).tween;\n    for (var i = 0, n = tween.length, t; i < n; ++i) {\n      if ((t = tween[i]).name === name) {\n        return t.value;\n      }\n    }\n    return null;\n  }\n\n  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));\n};\n\nfunction tweenValue(transition, name, value) {\n  var id = transition._id;\n\n  transition.each(function() {\n    var schedule = set$3(this, id);\n    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);\n  });\n\n  return function(node) {\n    return get$1(node, id).value[name];\n  };\n}\n\nvar interpolate$1 = function(a, b) {\n  var c;\n  return (typeof b === \"number\" ? interpolateNumber\n      : b instanceof color ? interpolateRgb\n      : (c = color(b)) ? (b = c, interpolateRgb)\n      : interpolateString)(a, b);\n};\n\nfunction attrRemove$1(name) {\n  return function() {\n    this.removeAttribute(name);\n  };\n}\n\nfunction attrRemoveNS$1(fullname) {\n  return function() {\n    this.removeAttributeNS(fullname.space, fullname.local);\n  };\n}\n\nfunction attrConstant$1(name, interpolate$$1, value1) {\n  var value00,\n      interpolate0;\n  return function() {\n    var value0 = this.getAttribute(name);\n    return value0 === value1 ? null\n        : value0 === value00 ? interpolate0\n        : interpolate0 = interpolate$$1(value00 = value0, value1);\n  };\n}\n\nfunction attrConstantNS$1(fullname, interpolate$$1, value1) {\n  var value00,\n      interpolate0;\n  return function() {\n    var value0 = this.getAttributeNS(fullname.space, fullname.local);\n    return value0 === value1 ? null\n        : value0 === value00 ? interpolate0\n        : interpolate0 = interpolate$$1(value00 = value0, value1);\n  };\n}\n\nfunction attrFunction$1(name, interpolate$$1, value) {\n  var value00,\n      value10,\n      interpolate0;\n  return function() {\n    var value0, value1 = value(this);\n    if (value1 == null) return void this.removeAttribute(name);\n    value0 = this.getAttribute(name);\n    return value0 === value1 ? null\n        : value0 === value00 && value1 === value10 ? interpolate0\n        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);\n  };\n}\n\nfunction attrFunctionNS$1(fullname, interpolate$$1, value) {\n  var value00,\n      value10,\n      interpolate0;\n  return function() {\n    var value0, value1 = value(this);\n    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);\n    value0 = this.getAttributeNS(fullname.space, fullname.local);\n    return value0 === value1 ? null\n        : value0 === value00 && value1 === value10 ? interpolate0\n        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);\n  };\n}\n\nvar transition_attr = function(name, value) {\n  var fullname = namespace(name), i = fullname === \"transform\" ? interpolateTransformSvg : interpolate$1;\n  return this.attrTween(name, typeof value === \"function\"\n      ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, \"attr.\" + name, value))\n      : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)\n      : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value));\n};\n\nfunction attrTweenNS(fullname, value) {\n  function tween() {\n    var node = this, i = value.apply(node, arguments);\n    return i && function(t) {\n      node.setAttributeNS(fullname.space, fullname.local, i(t));\n    };\n  }\n  tween._value = value;\n  return tween;\n}\n\nfunction attrTween(name, value) {\n  function tween() {\n    var node = this, i = value.apply(node, arguments);\n    return i && function(t) {\n      node.setAttribute(name, i(t));\n    };\n  }\n  tween._value = value;\n  return tween;\n}\n\nvar transition_attrTween = function(name, value) {\n  var key = \"attr.\" + name;\n  if (arguments.length < 2) return (key = this.tween(key)) && key._value;\n  if (value == null) return this.tween(key, null);\n  if (typeof value !== \"function\") throw new Error;\n  var fullname = namespace(name);\n  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));\n};\n\nfunction delayFunction(id, value) {\n  return function() {\n    init(this, id).delay = +value.apply(this, arguments);\n  };\n}\n\nfunction delayConstant(id, value) {\n  return value = +value, function() {\n    init(this, id).delay = value;\n  };\n}\n\nvar transition_delay = function(value) {\n  var id = this._id;\n\n  return arguments.length\n      ? this.each((typeof value === \"function\"\n          ? delayFunction\n          : delayConstant)(id, value))\n      : get$1(this.node(), id).delay;\n};\n\nfunction durationFunction(id, value) {\n  return function() {\n    set$3(this, id).duration = +value.apply(this, arguments);\n  };\n}\n\nfunction durationConstant(id, value) {\n  return value = +value, function() {\n    set$3(this, id).duration = value;\n  };\n}\n\nvar transition_duration = function(value) {\n  var id = this._id;\n\n  return arguments.length\n      ? this.each((typeof value === \"function\"\n          ? durationFunction\n          : durationConstant)(id, value))\n      : get$1(this.node(), id).duration;\n};\n\nfunction easeConstant(id, value) {\n  if (typeof value !== \"function\") throw new Error;\n  return function() {\n    set$3(this, id).ease = value;\n  };\n}\n\nvar transition_ease = function(value) {\n  var id = this._id;\n\n  return arguments.length\n      ? this.each(easeConstant(id, value))\n      : get$1(this.node(), id).ease;\n};\n\nvar transition_filter = function(match) {\n  if (typeof match !== \"function\") match = matcher$1(match);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {\n      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {\n        subgroup.push(node);\n      }\n    }\n  }\n\n  return new Transition(subgroups, this._parents, this._name, this._id);\n};\n\nvar transition_merge = function(transition) {\n  if (transition._id !== this._id) throw new Error;\n\n  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {\n    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {\n      if (node = group0[i] || group1[i]) {\n        merge[i] = node;\n      }\n    }\n  }\n\n  for (; j < m0; ++j) {\n    merges[j] = groups0[j];\n  }\n\n  return new Transition(merges, this._parents, this._name, this._id);\n};\n\nfunction start$1(name) {\n  return (name + \"\").trim().split(/^|\\s+/).every(function(t) {\n    var i = t.indexOf(\".\");\n    if (i >= 0) t = t.slice(0, i);\n    return !t || t === \"start\";\n  });\n}\n\nfunction onFunction(id, name, listener) {\n  var on0, on1, sit = start$1(name) ? init : set$3;\n  return function() {\n    var schedule = sit(this, id),\n        on = schedule.on;\n\n    // If this node shared a dispatch with the previous node,\n    // just assign the updated shared dispatch and we’re done!\n    // Otherwise, copy-on-write.\n    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);\n\n    schedule.on = on1;\n  };\n}\n\nvar transition_on = function(name, listener) {\n  var id = this._id;\n\n  return arguments.length < 2\n      ? get$1(this.node(), id).on.on(name)\n      : this.each(onFunction(id, name, listener));\n};\n\nfunction removeFunction(id) {\n  return function() {\n    var parent = this.parentNode;\n    for (var i in this.__transition) if (+i !== id) return;\n    if (parent) parent.removeChild(this);\n  };\n}\n\nvar transition_remove = function() {\n  return this.on(\"end.remove\", removeFunction(this._id));\n};\n\nvar transition_select = function(select$$1) {\n  var name = this._name,\n      id = this._id;\n\n  if (typeof select$$1 !== \"function\") select$$1 = selector(select$$1);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {\n      if ((node = group[i]) && (subnode = select$$1.call(node, node.__data__, i, group))) {\n        if (\"__data__\" in node) subnode.__data__ = node.__data__;\n        subgroup[i] = subnode;\n        schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));\n      }\n    }\n  }\n\n  return new Transition(subgroups, this._parents, name, id);\n};\n\nvar transition_selectAll = function(select$$1) {\n  var name = this._name,\n      id = this._id;\n\n  if (typeof select$$1 !== \"function\") select$$1 = selectorAll(select$$1);\n\n  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        for (var children = select$$1.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {\n          if (child = children[k]) {\n            schedule(child, name, id, k, children, inherit);\n          }\n        }\n        subgroups.push(children);\n        parents.push(node);\n      }\n    }\n  }\n\n  return new Transition(subgroups, parents, name, id);\n};\n\nvar Selection$1 = selection.prototype.constructor;\n\nvar transition_selection = function() {\n  return new Selection$1(this._groups, this._parents);\n};\n\nfunction styleRemove$1(name, interpolate$$1) {\n  var value00,\n      value10,\n      interpolate0;\n  return function() {\n    var style = window(this).getComputedStyle(this, null),\n        value0 = style.getPropertyValue(name),\n        value1 = (this.style.removeProperty(name), style.getPropertyValue(name));\n    return value0 === value1 ? null\n        : value0 === value00 && value1 === value10 ? interpolate0\n        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);\n  };\n}\n\nfunction styleRemoveEnd(name) {\n  return function() {\n    this.style.removeProperty(name);\n  };\n}\n\nfunction styleConstant$1(name, interpolate$$1, value1) {\n  var value00,\n      interpolate0;\n  return function() {\n    var value0 = window(this).getComputedStyle(this, null).getPropertyValue(name);\n    return value0 === value1 ? null\n        : value0 === value00 ? interpolate0\n        : interpolate0 = interpolate$$1(value00 = value0, value1);\n  };\n}\n\nfunction styleFunction$1(name, interpolate$$1, value) {\n  var value00,\n      value10,\n      interpolate0;\n  return function() {\n    var style = window(this).getComputedStyle(this, null),\n        value0 = style.getPropertyValue(name),\n        value1 = value(this);\n    if (value1 == null) value1 = (this.style.removeProperty(name), style.getPropertyValue(name));\n    return value0 === value1 ? null\n        : value0 === value00 && value1 === value10 ? interpolate0\n        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);\n  };\n}\n\nvar transition_style = function(name, value, priority) {\n  var i = (name += \"\") === \"transform\" ? interpolateTransformCss : interpolate$1;\n  return value == null ? this\n          .styleTween(name, styleRemove$1(name, i))\n          .on(\"end.style.\" + name, styleRemoveEnd(name))\n      : this.styleTween(name, typeof value === \"function\"\n          ? styleFunction$1(name, i, tweenValue(this, \"style.\" + name, value))\n          : styleConstant$1(name, i, value), priority);\n};\n\nfunction styleTween(name, value, priority) {\n  function tween() {\n    var node = this, i = value.apply(node, arguments);\n    return i && function(t) {\n      node.style.setProperty(name, i(t), priority);\n    };\n  }\n  tween._value = value;\n  return tween;\n}\n\nvar transition_styleTween = function(name, value, priority) {\n  var key = \"style.\" + (name += \"\");\n  if (arguments.length < 2) return (key = this.tween(key)) && key._value;\n  if (value == null) return this.tween(key, null);\n  if (typeof value !== \"function\") throw new Error;\n  return this.tween(key, styleTween(name, value, priority == null ? \"\" : priority));\n};\n\nfunction textConstant$1(value) {\n  return function() {\n    this.textContent = value;\n  };\n}\n\nfunction textFunction$1(value) {\n  return function() {\n    var value1 = value(this);\n    this.textContent = value1 == null ? \"\" : value1;\n  };\n}\n\nvar transition_text = function(value) {\n  return this.tween(\"text\", typeof value === \"function\"\n      ? textFunction$1(tweenValue(this, \"text\", value))\n      : textConstant$1(value == null ? \"\" : value + \"\"));\n};\n\nvar transition_transition = function() {\n  var name = this._name,\n      id0 = this._id,\n      id1 = newId();\n\n  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        var inherit = get$1(node, id0);\n        schedule(node, name, id1, i, group, {\n          time: inherit.time + inherit.delay + inherit.duration,\n          delay: 0,\n          duration: inherit.duration,\n          ease: inherit.ease\n        });\n      }\n    }\n  }\n\n  return new Transition(groups, this._parents, name, id1);\n};\n\nvar id = 0;\n\nfunction Transition(groups, parents, name, id) {\n  this._groups = groups;\n  this._parents = parents;\n  this._name = name;\n  this._id = id;\n}\n\nfunction transition(name) {\n  return selection().transition(name);\n}\n\nfunction newId() {\n  return ++id;\n}\n\nvar selection_prototype = selection.prototype;\n\nTransition.prototype = transition.prototype = {\n  constructor: Transition,\n  select: transition_select,\n  selectAll: transition_selectAll,\n  filter: transition_filter,\n  merge: transition_merge,\n  selection: transition_selection,\n  transition: transition_transition,\n  call: selection_prototype.call,\n  nodes: selection_prototype.nodes,\n  node: selection_prototype.node,\n  size: selection_prototype.size,\n  empty: selection_prototype.empty,\n  each: selection_prototype.each,\n  on: transition_on,\n  attr: transition_attr,\n  attrTween: transition_attrTween,\n  style: transition_style,\n  styleTween: transition_styleTween,\n  text: transition_text,\n  remove: transition_remove,\n  tween: transition_tween,\n  delay: transition_delay,\n  duration: transition_duration,\n  ease: transition_ease\n};\n\nvar defaultTiming = {\n  time: null, // Set on use.\n  delay: 0,\n  duration: 250,\n  ease: cubicInOut\n};\n\nfunction inherit(node, id) {\n  var timing;\n  while (!(timing = node.__transition) || !(timing = timing[id])) {\n    if (!(node = node.parentNode)) {\n      return defaultTiming.time = now(), defaultTiming;\n    }\n  }\n  return timing;\n}\n\nvar selection_transition = function(name) {\n  var id,\n      timing;\n\n  if (name instanceof Transition) {\n    id = name._id, name = name._name;\n  } else {\n    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + \"\";\n  }\n\n  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        schedule(node, name, id, i, group, timing || inherit(node, id));\n      }\n    }\n  }\n\n  return new Transition(groups, this._parents, name, id);\n};\n\nselection.prototype.interrupt = selection_interrupt;\nselection.prototype.transition = selection_transition;\n\nvar root$1 = [null];\n\nvar active = function(node, name) {\n  var schedules = node.__transition,\n      schedule,\n      i;\n\n  if (schedules) {\n    name = name == null ? null : name + \"\";\n    for (i in schedules) {\n      if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {\n        return new Transition([[node]], root$1, name, +i);\n      }\n    }\n  }\n\n  return null;\n};\n\nvar slice$4 = Array.prototype.slice;\n\nvar identity$5 = function(x) {\n  return x;\n};\n\nvar top = 1;\nvar right = 2;\nvar bottom = 3;\nvar left = 4;\nvar epsilon$2 = 1e-6;\n\nfunction translateX(scale0, scale1, d) {\n  var x = scale0(d);\n  return \"translate(\" + (isFinite(x) ? x : scale1(d)) + \",0)\";\n}\n\nfunction translateY(scale0, scale1, d) {\n  var y = scale0(d);\n  return \"translate(0,\" + (isFinite(y) ? y : scale1(d)) + \")\";\n}\n\nfunction center(scale) {\n  var offset = scale.bandwidth() / 2;\n  if (scale.round()) offset = Math.round(offset);\n  return function(d) {\n    return scale(d) + offset;\n  };\n}\n\nfunction entering() {\n  return !this.__axis;\n}\n\nfunction axis(orient, scale) {\n  var tickArguments = [],\n      tickValues = null,\n      tickFormat = null,\n      tickSizeInner = 6,\n      tickSizeOuter = 6,\n      tickPadding = 3;\n\n  function axis(context) {\n    var values = tickValues == null ? (scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain()) : tickValues,\n        format = tickFormat == null ? (scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity$5) : tickFormat,\n        spacing = Math.max(tickSizeInner, 0) + tickPadding,\n        transform = orient === top || orient === bottom ? translateX : translateY,\n        range = scale.range(),\n        range0 = range[0] + 0.5,\n        range1 = range[range.length - 1] + 0.5,\n        position = (scale.bandwidth ? center : identity$5)(scale.copy()),\n        selection = context.selection ? context.selection() : context,\n        path = selection.selectAll(\".domain\").data([null]),\n        tick = selection.selectAll(\".tick\").data(values, scale).order(),\n        tickExit = tick.exit(),\n        tickEnter = tick.enter().append(\"g\").attr(\"class\", \"tick\"),\n        line = tick.select(\"line\"),\n        text = tick.select(\"text\"),\n        k = orient === top || orient === left ? -1 : 1,\n        x, y = orient === left || orient === right ? (x = \"x\", \"y\") : (x = \"y\", \"x\");\n\n    path = path.merge(path.enter().insert(\"path\", \".tick\")\n        .attr(\"class\", \"domain\")\n        .attr(\"stroke\", \"#000\"));\n\n    tick = tick.merge(tickEnter);\n\n    line = line.merge(tickEnter.append(\"line\")\n        .attr(\"stroke\", \"#000\")\n        .attr(x + \"2\", k * tickSizeInner)\n        .attr(y + \"1\", 0.5)\n        .attr(y + \"2\", 0.5));\n\n    text = text.merge(tickEnter.append(\"text\")\n        .attr(\"fill\", \"#000\")\n        .attr(x, k * spacing)\n        .attr(y, 0.5)\n        .attr(\"dy\", orient === top ? \"0em\" : orient === bottom ? \"0.71em\" : \"0.32em\"));\n\n    if (context !== selection) {\n      path = path.transition(context);\n      tick = tick.transition(context);\n      line = line.transition(context);\n      text = text.transition(context);\n\n      tickExit = tickExit.transition(context)\n          .attr(\"opacity\", epsilon$2)\n          .attr(\"transform\", function(d) { return transform(position, this.parentNode.__axis || position, d); });\n\n      tickEnter\n          .attr(\"opacity\", epsilon$2)\n          .attr(\"transform\", function(d) { return transform(this.parentNode.__axis || position, position, d); });\n    }\n\n    tickExit.remove();\n\n    path\n        .attr(\"d\", orient === left || orient == right\n            ? \"M\" + k * tickSizeOuter + \",\" + range0 + \"H0.5V\" + range1 + \"H\" + k * tickSizeOuter\n            : \"M\" + range0 + \",\" + k * tickSizeOuter + \"V0.5H\" + range1 + \"V\" + k * tickSizeOuter);\n\n    tick\n        .attr(\"opacity\", 1)\n        .attr(\"transform\", function(d) { return transform(position, position, d); });\n\n    line\n        .attr(x + \"2\", k * tickSizeInner);\n\n    text\n        .attr(x, k * spacing)\n        .text(format);\n\n    selection.filter(entering)\n        .attr(\"fill\", \"none\")\n        .attr(\"font-size\", 10)\n        .attr(\"font-family\", \"sans-serif\")\n        .attr(\"text-anchor\", orient === right ? \"start\" : orient === left ? \"end\" : \"middle\");\n\n    selection\n        .each(function() { this.__axis = position; });\n  }\n\n  axis.scale = function(_) {\n    return arguments.length ? (scale = _, axis) : scale;\n  };\n\n  axis.ticks = function() {\n    return tickArguments = slice$4.call(arguments), axis;\n  };\n\n  axis.tickArguments = function(_) {\n    return arguments.length ? (tickArguments = _ == null ? [] : slice$4.call(_), axis) : tickArguments.slice();\n  };\n\n  axis.tickValues = function(_) {\n    return arguments.length ? (tickValues = _ == null ? null : slice$4.call(_), axis) : tickValues && tickValues.slice();\n  };\n\n  axis.tickFormat = function(_) {\n    return arguments.length ? (tickFormat = _, axis) : tickFormat;\n  };\n\n  axis.tickSize = function(_) {\n    return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner;\n  };\n\n  axis.tickSizeInner = function(_) {\n    return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner;\n  };\n\n  axis.tickSizeOuter = function(_) {\n    return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter;\n  };\n\n  axis.tickPadding = function(_) {\n    return arguments.length ? (tickPadding = +_, axis) : tickPadding;\n  };\n\n  return axis;\n}\n\nfunction axisTop(scale) {\n  return axis(top, scale);\n}\n\nfunction axisRight(scale) {\n  return axis(right, scale);\n}\n\nfunction axisBottom(scale) {\n  return axis(bottom, scale);\n}\n\nfunction axisLeft(scale) {\n  return axis(left, scale);\n}\n\nfunction defaultSeparation(a, b) {\n  return a.parent === b.parent ? 1 : 2;\n}\n\nfunction meanX(children) {\n  return children.reduce(meanXReduce, 0) / children.length;\n}\n\nfunction meanXReduce(x, c) {\n  return x + c.x;\n}\n\nfunction maxY(children) {\n  return 1 + children.reduce(maxYReduce, 0);\n}\n\nfunction maxYReduce(y, c) {\n  return Math.max(y, c.y);\n}\n\nfunction leafLeft(node) {\n  var children;\n  while (children = node.children) node = children[0];\n  return node;\n}\n\nfunction leafRight(node) {\n  var children;\n  while (children = node.children) node = children[children.length - 1];\n  return node;\n}\n\nvar cluster = function() {\n  var separation = defaultSeparation,\n      dx = 1,\n      dy = 1,\n      nodeSize = false;\n\n  function cluster(root) {\n    var previousNode,\n        x = 0;\n\n    // First walk, computing the initial x & y values.\n    root.eachAfter(function(node) {\n      var children = node.children;\n      if (children) {\n        node.x = meanX(children);\n        node.y = maxY(children);\n      } else {\n        node.x = previousNode ? x += separation(node, previousNode) : 0;\n        node.y = 0;\n        previousNode = node;\n      }\n    });\n\n    var left = leafLeft(root),\n        right = leafRight(root),\n        x0 = left.x - separation(left, right) / 2,\n        x1 = right.x + separation(right, left) / 2;\n\n    // Second walk, normalizing x & y to the desired size.\n    return root.eachAfter(nodeSize ? function(node) {\n      node.x = (node.x - root.x) * dx;\n      node.y = (root.y - node.y) * dy;\n    } : function(node) {\n      node.x = (node.x - x0) / (x1 - x0) * dx;\n      node.y = (1 - (root.y ? node.y / root.y : 1)) * dy;\n    });\n  }\n\n  cluster.separation = function(x) {\n    return arguments.length ? (separation = x, cluster) : separation;\n  };\n\n  cluster.size = function(x) {\n    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? null : [dx, dy]);\n  };\n\n  cluster.nodeSize = function(x) {\n    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? [dx, dy] : null);\n  };\n\n  return cluster;\n};\n\nvar node_each = function(callback) {\n  var node = this, current, next = [node], children, i, n;\n  do {\n    current = next.reverse(), next = [];\n    while (node = current.pop()) {\n      callback(node), children = node.children;\n      if (children) for (i = 0, n = children.length; i < n; ++i) {\n        next.push(children[i]);\n      }\n    }\n  } while (next.length);\n  return this;\n};\n\nvar node_eachBefore = function(callback) {\n  var node = this, nodes = [node], children, i;\n  while (node = nodes.pop()) {\n    callback(node), children = node.children;\n    if (children) for (i = children.length - 1; i >= 0; --i) {\n      nodes.push(children[i]);\n    }\n  }\n  return this;\n};\n\nvar node_eachAfter = function(callback) {\n  var node = this, nodes = [node], next = [], children, i, n;\n  while (node = nodes.pop()) {\n    next.push(node), children = node.children;\n    if (children) for (i = 0, n = children.length; i < n; ++i) {\n      nodes.push(children[i]);\n    }\n  }\n  while (node = next.pop()) {\n    callback(node);\n  }\n  return this;\n};\n\nvar node_sum = function(value) {\n  return this.eachAfter(function(node) {\n    var sum = +value(node.data) || 0,\n        children = node.children,\n        i = children && children.length;\n    while (--i >= 0) sum += children[i].value;\n    node.value = sum;\n  });\n};\n\nvar node_sort = function(compare) {\n  return this.eachBefore(function(node) {\n    if (node.children) {\n      node.children.sort(compare);\n    }\n  });\n};\n\nvar node_path = function(end) {\n  var start = this,\n      ancestor = leastCommonAncestor(start, end),\n      nodes = [start];\n  while (start !== ancestor) {\n    start = start.parent;\n    nodes.push(start);\n  }\n  var k = nodes.length;\n  while (end !== ancestor) {\n    nodes.splice(k, 0, end);\n    end = end.parent;\n  }\n  return nodes;\n};\n\nfunction leastCommonAncestor(a, b) {\n  if (a === b) return a;\n  var aNodes = a.ancestors(),\n      bNodes = b.ancestors(),\n      c = null;\n  a = aNodes.pop();\n  b = bNodes.pop();\n  while (a === b) {\n    c = a;\n    a = aNodes.pop();\n    b = bNodes.pop();\n  }\n  return c;\n}\n\nvar node_ancestors = function() {\n  var node = this, nodes = [node];\n  while (node = node.parent) {\n    nodes.push(node);\n  }\n  return nodes;\n};\n\nvar node_descendants = function() {\n  var nodes = [];\n  this.each(function(node) {\n    nodes.push(node);\n  });\n  return nodes;\n};\n\nvar node_leaves = function() {\n  var leaves = [];\n  this.eachBefore(function(node) {\n    if (!node.children) {\n      leaves.push(node);\n    }\n  });\n  return leaves;\n};\n\nvar node_links = function() {\n  var root = this, links = [];\n  root.each(function(node) {\n    if (node !== root) { // Don’t include the root’s parent, if any.\n      links.push({source: node.parent, target: node});\n    }\n  });\n  return links;\n};\n\nfunction hierarchy(data, children) {\n  var root = new Node(data),\n      valued = +data.value && (root.value = data.value),\n      node,\n      nodes = [root],\n      child,\n      childs,\n      i,\n      n;\n\n  if (children == null) children = defaultChildren;\n\n  while (node = nodes.pop()) {\n    if (valued) node.value = +node.data.value;\n    if ((childs = children(node.data)) && (n = childs.length)) {\n      node.children = new Array(n);\n      for (i = n - 1; i >= 0; --i) {\n        nodes.push(child = node.children[i] = new Node(childs[i]));\n        child.parent = node;\n        child.depth = node.depth + 1;\n      }\n    }\n  }\n\n  return root.eachBefore(computeHeight);\n}\n\nfunction node_copy() {\n  return hierarchy(this).eachBefore(copyData);\n}\n\nfunction defaultChildren(d) {\n  return d.children;\n}\n\nfunction copyData(node) {\n  node.data = node.data.data;\n}\n\nfunction computeHeight(node) {\n  var height = 0;\n  do node.height = height;\n  while ((node = node.parent) && (node.height < ++height));\n}\n\nfunction Node(data) {\n  this.data = data;\n  this.depth =\n  this.height = 0;\n  this.parent = null;\n}\n\nNode.prototype = hierarchy.prototype = {\n  constructor: Node,\n  each: node_each,\n  eachAfter: node_eachAfter,\n  eachBefore: node_eachBefore,\n  sum: node_sum,\n  sort: node_sort,\n  path: node_path,\n  ancestors: node_ancestors,\n  descendants: node_descendants,\n  leaves: node_leaves,\n  links: node_links,\n  copy: node_copy\n};\n\nfunction Node$2(value) {\n  this._ = value;\n  this.next = null;\n}\n\nvar shuffle$1 = function(array) {\n  var i,\n      n = (array = array.slice()).length,\n      head = null,\n      node = head;\n\n  while (n) {\n    var next = new Node$2(array[n - 1]);\n    if (node) node = node.next = next;\n    else node = head = next;\n    array[i] = array[--n];\n  }\n\n  return {\n    head: head,\n    tail: node\n  };\n};\n\nvar enclose = function(circles) {\n  return encloseN(shuffle$1(circles), []);\n};\n\nfunction encloses(a, b) {\n  var dx = b.x - a.x,\n      dy = b.y - a.y,\n      dr = a.r - b.r;\n  return dr * dr + 1e-6 > dx * dx + dy * dy;\n}\n\n// Returns the smallest circle that contains circles L and intersects circles B.\nfunction encloseN(L, B) {\n  var circle,\n      l0 = null,\n      l1 = L.head,\n      l2,\n      p1;\n\n  switch (B.length) {\n    case 1: circle = enclose1(B[0]); break;\n    case 2: circle = enclose2(B[0], B[1]); break;\n    case 3: circle = enclose3(B[0], B[1], B[2]); break;\n  }\n\n  while (l1) {\n    p1 = l1._, l2 = l1.next;\n    if (!circle || !encloses(circle, p1)) {\n\n      // Temporarily truncate L before l1.\n      if (l0) L.tail = l0, l0.next = null;\n      else L.head = L.tail = null;\n\n      B.push(p1);\n      circle = encloseN(L, B); // Note: reorders L!\n      B.pop();\n\n      // Move l1 to the front of L and reconnect the truncated list L.\n      if (L.head) l1.next = L.head, L.head = l1;\n      else l1.next = null, L.head = L.tail = l1;\n      l0 = L.tail, l0.next = l2;\n\n    } else {\n      l0 = l1;\n    }\n    l1 = l2;\n  }\n\n  L.tail = l0;\n  return circle;\n}\n\nfunction enclose1(a) {\n  return {\n    x: a.x,\n    y: a.y,\n    r: a.r\n  };\n}\n\nfunction enclose2(a, b) {\n  var x1 = a.x, y1 = a.y, r1 = a.r,\n      x2 = b.x, y2 = b.y, r2 = b.r,\n      x21 = x2 - x1, y21 = y2 - y1, r21 = r2 - r1,\n      l = Math.sqrt(x21 * x21 + y21 * y21);\n  return {\n    x: (x1 + x2 + x21 / l * r21) / 2,\n    y: (y1 + y2 + y21 / l * r21) / 2,\n    r: (l + r1 + r2) / 2\n  };\n}\n\nfunction enclose3(a, b, c) {\n  var x1 = a.x, y1 = a.y, r1 = a.r,\n      x2 = b.x, y2 = b.y, r2 = b.r,\n      x3 = c.x, y3 = c.y, r3 = c.r,\n      a2 = 2 * (x1 - x2),\n      b2 = 2 * (y1 - y2),\n      c2 = 2 * (r2 - r1),\n      d2 = x1 * x1 + y1 * y1 - r1 * r1 - x2 * x2 - y2 * y2 + r2 * r2,\n      a3 = 2 * (x1 - x3),\n      b3 = 2 * (y1 - y3),\n      c3 = 2 * (r3 - r1),\n      d3 = x1 * x1 + y1 * y1 - r1 * r1 - x3 * x3 - y3 * y3 + r3 * r3,\n      ab = a3 * b2 - a2 * b3,\n      xa = (b2 * d3 - b3 * d2) / ab - x1,\n      xb = (b3 * c2 - b2 * c3) / ab,\n      ya = (a3 * d2 - a2 * d3) / ab - y1,\n      yb = (a2 * c3 - a3 * c2) / ab,\n      A = xb * xb + yb * yb - 1,\n      B = 2 * (xa * xb + ya * yb + r1),\n      C = xa * xa + ya * ya - r1 * r1,\n      r = (-B - Math.sqrt(B * B - 4 * A * C)) / (2 * A);\n  return {\n    x: xa + xb * r + x1,\n    y: ya + yb * r + y1,\n    r: r\n  };\n}\n\nfunction place(a, b, c) {\n  var ax = a.x,\n      ay = a.y,\n      da = b.r + c.r,\n      db = a.r + c.r,\n      dx = b.x - ax,\n      dy = b.y - ay,\n      dc = dx * dx + dy * dy;\n  if (dc) {\n    var x = 0.5 + ((db *= db) - (da *= da)) / (2 * dc),\n        y = Math.sqrt(Math.max(0, 2 * da * (db + dc) - (db -= dc) * db - da * da)) / (2 * dc);\n    c.x = ax + x * dx + y * dy;\n    c.y = ay + x * dy - y * dx;\n  } else {\n    c.x = ax + db;\n    c.y = ay;\n  }\n}\n\nfunction intersects(a, b) {\n  var dx = b.x - a.x,\n      dy = b.y - a.y,\n      dr = a.r + b.r;\n  return dr * dr > dx * dx + dy * dy;\n}\n\nfunction distance2(circle, x, y) {\n  var dx = circle.x - x,\n      dy = circle.y - y;\n  return dx * dx + dy * dy;\n}\n\nfunction Node$1(circle) {\n  this._ = circle;\n  this.next = null;\n  this.previous = null;\n}\n\nfunction packEnclose(circles) {\n  if (!(n = circles.length)) return 0;\n\n  var a, b, c, n;\n\n  // Place the first circle.\n  a = circles[0], a.x = 0, a.y = 0;\n  if (!(n > 1)) return a.r;\n\n  // Place the second circle.\n  b = circles[1], a.x = -b.r, b.x = a.r, b.y = 0;\n  if (!(n > 2)) return a.r + b.r;\n\n  // Place the third circle.\n  place(b, a, c = circles[2]);\n\n  // Initialize the weighted centroid.\n  var aa = a.r * a.r,\n      ba = b.r * b.r,\n      ca = c.r * c.r,\n      oa = aa + ba + ca,\n      ox = aa * a.x + ba * b.x + ca * c.x,\n      oy = aa * a.y + ba * b.y + ca * c.y,\n      cx, cy, i, j, k, sj, sk;\n\n  // Initialize the front-chain using the first three circles a, b and c.\n  a = new Node$1(a), b = new Node$1(b), c = new Node$1(c);\n  a.next = c.previous = b;\n  b.next = a.previous = c;\n  c.next = b.previous = a;\n\n  // Attempt to place each remaining circle…\n  pack: for (i = 3; i < n; ++i) {\n    place(a._, b._, c = circles[i]), c = new Node$1(c);\n\n    // If there are only three elements in the front-chain…\n    if ((k = a.previous) === (j = b.next)) {\n      // If the new circle intersects the third circle,\n      // rotate the front chain to try the next position.\n      if (intersects(j._, c._)) {\n        a = b, b = j, --i;\n        continue pack;\n      }\n    }\n\n    // Find the closest intersecting circle on the front-chain, if any.\n    else {\n      sj = j._.r, sk = k._.r;\n      do {\n        if (sj <= sk) {\n          if (intersects(j._, c._)) {\n            b = j, a.next = b, b.previous = a, --i;\n            continue pack;\n          }\n          j = j.next, sj += j._.r;\n        } else {\n          if (intersects(k._, c._)) {\n            a = k, a.next = b, b.previous = a, --i;\n            continue pack;\n          }\n          k = k.previous, sk += k._.r;\n        }\n      } while (j !== k.next);\n    }\n\n    // Success! Insert the new circle c between a and b.\n    c.previous = a, c.next = b, a.next = b.previous = b = c;\n\n    // Update the weighted centroid.\n    oa += ca = c._.r * c._.r;\n    ox += ca * c._.x;\n    oy += ca * c._.y;\n\n    // Compute the new closest circle a to centroid.\n    aa = distance2(a._, cx = ox / oa, cy = oy / oa);\n    while ((c = c.next) !== b) {\n      if ((ca = distance2(c._, cx, cy)) < aa) {\n        a = c, aa = ca;\n      }\n    }\n    b = a.next;\n  }\n\n  // Compute the enclosing circle of the front chain.\n  a = [b._], c = b; while ((c = c.next) !== b) a.push(c._); c = enclose(a);\n\n  // Translate the circles to put the enclosing circle around the origin.\n  for (i = 0; i < n; ++i) a = circles[i], a.x -= c.x, a.y -= c.y;\n\n  return c.r;\n}\n\nvar siblings = function(circles) {\n  packEnclose(circles);\n  return circles;\n};\n\nfunction optional(f) {\n  return f == null ? null : required(f);\n}\n\nfunction required(f) {\n  if (typeof f !== \"function\") throw new Error;\n  return f;\n}\n\nfunction constantZero() {\n  return 0;\n}\n\nvar constant$6 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nfunction defaultRadius(d) {\n  return Math.sqrt(d.value);\n}\n\nvar index = function() {\n  var radius = null,\n      dx = 1,\n      dy = 1,\n      padding = constantZero;\n\n  function pack(root) {\n    root.x = dx / 2, root.y = dy / 2;\n    if (radius) {\n      root.eachBefore(radiusLeaf(radius))\n          .eachAfter(packChildren(padding, 0.5))\n          .eachBefore(translateChild(1));\n    } else {\n      root.eachBefore(radiusLeaf(defaultRadius))\n          .eachAfter(packChildren(constantZero, 1))\n          .eachAfter(packChildren(padding, root.r / Math.min(dx, dy)))\n          .eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r)));\n    }\n    return root;\n  }\n\n  pack.radius = function(x) {\n    return arguments.length ? (radius = optional(x), pack) : radius;\n  };\n\n  pack.size = function(x) {\n    return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];\n  };\n\n  pack.padding = function(x) {\n    return arguments.length ? (padding = typeof x === \"function\" ? x : constant$6(+x), pack) : padding;\n  };\n\n  return pack;\n};\n\nfunction radiusLeaf(radius) {\n  return function(node) {\n    if (!node.children) {\n      node.r = Math.max(0, +radius(node) || 0);\n    }\n  };\n}\n\nfunction packChildren(padding, k) {\n  return function(node) {\n    if (children = node.children) {\n      var children,\n          i,\n          n = children.length,\n          r = padding(node) * k || 0,\n          e;\n\n      if (r) for (i = 0; i < n; ++i) children[i].r += r;\n      e = packEnclose(children);\n      if (r) for (i = 0; i < n; ++i) children[i].r -= r;\n      node.r = e + r;\n    }\n  };\n}\n\nfunction translateChild(k) {\n  return function(node) {\n    var parent = node.parent;\n    node.r *= k;\n    if (parent) {\n      node.x = parent.x + k * node.x;\n      node.y = parent.y + k * node.y;\n    }\n  };\n}\n\nvar roundNode = function(node) {\n  node.x0 = Math.round(node.x0);\n  node.y0 = Math.round(node.y0);\n  node.x1 = Math.round(node.x1);\n  node.y1 = Math.round(node.y1);\n};\n\nvar treemapDice = function(parent, x0, y0, x1, y1) {\n  var nodes = parent.children,\n      node,\n      i = -1,\n      n = nodes.length,\n      k = parent.value && (x1 - x0) / parent.value;\n\n  while (++i < n) {\n    node = nodes[i], node.y0 = y0, node.y1 = y1;\n    node.x0 = x0, node.x1 = x0 += node.value * k;\n  }\n};\n\nvar partition = function() {\n  var dx = 1,\n      dy = 1,\n      padding = 0,\n      round = false;\n\n  function partition(root) {\n    var n = root.height + 1;\n    root.x0 =\n    root.y0 = padding;\n    root.x1 = dx;\n    root.y1 = dy / n;\n    root.eachBefore(positionNode(dy, n));\n    if (round) root.eachBefore(roundNode);\n    return root;\n  }\n\n  function positionNode(dy, n) {\n    return function(node) {\n      if (node.children) {\n        treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);\n      }\n      var x0 = node.x0,\n          y0 = node.y0,\n          x1 = node.x1 - padding,\n          y1 = node.y1 - padding;\n      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;\n      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;\n      node.x0 = x0;\n      node.y0 = y0;\n      node.x1 = x1;\n      node.y1 = y1;\n    };\n  }\n\n  partition.round = function(x) {\n    return arguments.length ? (round = !!x, partition) : round;\n  };\n\n  partition.size = function(x) {\n    return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];\n  };\n\n  partition.padding = function(x) {\n    return arguments.length ? (padding = +x, partition) : padding;\n  };\n\n  return partition;\n};\n\nvar keyPrefix$1 = \"$\";\nvar preroot = {depth: -1};\nvar ambiguous = {};\n\nfunction defaultId(d) {\n  return d.id;\n}\n\nfunction defaultParentId(d) {\n  return d.parentId;\n}\n\nvar stratify = function() {\n  var id = defaultId,\n      parentId = defaultParentId;\n\n  function stratify(data) {\n    var d,\n        i,\n        n = data.length,\n        root,\n        parent,\n        node,\n        nodes = new Array(n),\n        nodeId,\n        nodeKey,\n        nodeByKey = {};\n\n    for (i = 0; i < n; ++i) {\n      d = data[i], node = nodes[i] = new Node(d);\n      if ((nodeId = id(d, i, data)) != null && (nodeId += \"\")) {\n        nodeKey = keyPrefix$1 + (node.id = nodeId);\n        nodeByKey[nodeKey] = nodeKey in nodeByKey ? ambiguous : node;\n      }\n    }\n\n    for (i = 0; i < n; ++i) {\n      node = nodes[i], nodeId = parentId(data[i], i, data);\n      if (nodeId == null || !(nodeId += \"\")) {\n        if (root) throw new Error(\"multiple roots\");\n        root = node;\n      } else {\n        parent = nodeByKey[keyPrefix$1 + nodeId];\n        if (!parent) throw new Error(\"missing: \" + nodeId);\n        if (parent === ambiguous) throw new Error(\"ambiguous: \" + nodeId);\n        if (parent.children) parent.children.push(node);\n        else parent.children = [node];\n        node.parent = parent;\n      }\n    }\n\n    if (!root) throw new Error(\"no root\");\n    root.parent = preroot;\n    root.eachBefore(function(node) { node.depth = node.parent.depth + 1; --n; }).eachBefore(computeHeight);\n    root.parent = null;\n    if (n > 0) throw new Error(\"cycle\");\n\n    return root;\n  }\n\n  stratify.id = function(x) {\n    return arguments.length ? (id = required(x), stratify) : id;\n  };\n\n  stratify.parentId = function(x) {\n    return arguments.length ? (parentId = required(x), stratify) : parentId;\n  };\n\n  return stratify;\n};\n\nfunction defaultSeparation$1(a, b) {\n  return a.parent === b.parent ? 1 : 2;\n}\n\n// function radialSeparation(a, b) {\n//   return (a.parent === b.parent ? 1 : 2) / a.depth;\n// }\n\n// This function is used to traverse the left contour of a subtree (or\n// subforest). It returns the successor of v on this contour. This successor is\n// either given by the leftmost child of v or by the thread of v. The function\n// returns null if and only if v is on the highest level of its subtree.\nfunction nextLeft(v) {\n  var children = v.children;\n  return children ? children[0] : v.t;\n}\n\n// This function works analogously to nextLeft.\nfunction nextRight(v) {\n  var children = v.children;\n  return children ? children[children.length - 1] : v.t;\n}\n\n// Shifts the current subtree rooted at w+. This is done by increasing\n// prelim(w+) and mod(w+) by shift.\nfunction moveSubtree(wm, wp, shift) {\n  var change = shift / (wp.i - wm.i);\n  wp.c -= change;\n  wp.s += shift;\n  wm.c += change;\n  wp.z += shift;\n  wp.m += shift;\n}\n\n// All other shifts, applied to the smaller subtrees between w- and w+, are\n// performed by this function. To prepare the shifts, we have to adjust\n// change(w+), shift(w+), and change(w-).\nfunction executeShifts(v) {\n  var shift = 0,\n      change = 0,\n      children = v.children,\n      i = children.length,\n      w;\n  while (--i >= 0) {\n    w = children[i];\n    w.z += shift;\n    w.m += shift;\n    shift += w.s + (change += w.c);\n  }\n}\n\n// If vi-’s ancestor is a sibling of v, returns vi-’s ancestor. Otherwise,\n// returns the specified (default) ancestor.\nfunction nextAncestor(vim, v, ancestor) {\n  return vim.a.parent === v.parent ? vim.a : ancestor;\n}\n\nfunction TreeNode(node, i) {\n  this._ = node;\n  this.parent = null;\n  this.children = null;\n  this.A = null; // default ancestor\n  this.a = this; // ancestor\n  this.z = 0; // prelim\n  this.m = 0; // mod\n  this.c = 0; // change\n  this.s = 0; // shift\n  this.t = null; // thread\n  this.i = i; // number\n}\n\nTreeNode.prototype = Object.create(Node.prototype);\n\nfunction treeRoot(root) {\n  var tree = new TreeNode(root, 0),\n      node,\n      nodes = [tree],\n      child,\n      children,\n      i,\n      n;\n\n  while (node = nodes.pop()) {\n    if (children = node._.children) {\n      node.children = new Array(n = children.length);\n      for (i = n - 1; i >= 0; --i) {\n        nodes.push(child = node.children[i] = new TreeNode(children[i], i));\n        child.parent = node;\n      }\n    }\n  }\n\n  (tree.parent = new TreeNode(null, 0)).children = [tree];\n  return tree;\n}\n\n// Node-link tree diagram using the Reingold-Tilford \"tidy\" algorithm\nvar tree = function() {\n  var separation = defaultSeparation$1,\n      dx = 1,\n      dy = 1,\n      nodeSize = null;\n\n  function tree(root) {\n    var t = treeRoot(root);\n\n    // Compute the layout using Buchheim et al.’s algorithm.\n    t.eachAfter(firstWalk), t.parent.m = -t.z;\n    t.eachBefore(secondWalk);\n\n    // If a fixed node size is specified, scale x and y.\n    if (nodeSize) root.eachBefore(sizeNode);\n\n    // If a fixed tree size is specified, scale x and y based on the extent.\n    // Compute the left-most, right-most, and depth-most nodes for extents.\n    else {\n      var left = root,\n          right = root,\n          bottom = root;\n      root.eachBefore(function(node) {\n        if (node.x < left.x) left = node;\n        if (node.x > right.x) right = node;\n        if (node.depth > bottom.depth) bottom = node;\n      });\n      var s = left === right ? 1 : separation(left, right) / 2,\n          tx = s - left.x,\n          kx = dx / (right.x + s + tx),\n          ky = dy / (bottom.depth || 1);\n      root.eachBefore(function(node) {\n        node.x = (node.x + tx) * kx;\n        node.y = node.depth * ky;\n      });\n    }\n\n    return root;\n  }\n\n  // Computes a preliminary x-coordinate for v. Before that, FIRST WALK is\n  // applied recursively to the children of v, as well as the function\n  // APPORTION. After spacing out the children by calling EXECUTE SHIFTS, the\n  // node v is placed to the midpoint of its outermost children.\n  function firstWalk(v) {\n    var children = v.children,\n        siblings = v.parent.children,\n        w = v.i ? siblings[v.i - 1] : null;\n    if (children) {\n      executeShifts(v);\n      var midpoint = (children[0].z + children[children.length - 1].z) / 2;\n      if (w) {\n        v.z = w.z + separation(v._, w._);\n        v.m = v.z - midpoint;\n      } else {\n        v.z = midpoint;\n      }\n    } else if (w) {\n      v.z = w.z + separation(v._, w._);\n    }\n    v.parent.A = apportion(v, w, v.parent.A || siblings[0]);\n  }\n\n  // Computes all real x-coordinates by summing up the modifiers recursively.\n  function secondWalk(v) {\n    v._.x = v.z + v.parent.m;\n    v.m += v.parent.m;\n  }\n\n  // The core of the algorithm. Here, a new subtree is combined with the\n  // previous subtrees. Threads are used to traverse the inside and outside\n  // contours of the left and right subtree up to the highest common level. The\n  // vertices used for the traversals are vi+, vi-, vo-, and vo+, where the\n  // superscript o means outside and i means inside, the subscript - means left\n  // subtree and + means right subtree. For summing up the modifiers along the\n  // contour, we use respective variables si+, si-, so-, and so+. Whenever two\n  // nodes of the inside contours conflict, we compute the left one of the\n  // greatest uncommon ancestors using the function ANCESTOR and call MOVE\n  // SUBTREE to shift the subtree and prepare the shifts of smaller subtrees.\n  // Finally, we add a new thread (if necessary).\n  function apportion(v, w, ancestor) {\n    if (w) {\n      var vip = v,\n          vop = v,\n          vim = w,\n          vom = vip.parent.children[0],\n          sip = vip.m,\n          sop = vop.m,\n          sim = vim.m,\n          som = vom.m,\n          shift;\n      while (vim = nextRight(vim), vip = nextLeft(vip), vim && vip) {\n        vom = nextLeft(vom);\n        vop = nextRight(vop);\n        vop.a = v;\n        shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);\n        if (shift > 0) {\n          moveSubtree(nextAncestor(vim, v, ancestor), v, shift);\n          sip += shift;\n          sop += shift;\n        }\n        sim += vim.m;\n        sip += vip.m;\n        som += vom.m;\n        sop += vop.m;\n      }\n      if (vim && !nextRight(vop)) {\n        vop.t = vim;\n        vop.m += sim - sop;\n      }\n      if (vip && !nextLeft(vom)) {\n        vom.t = vip;\n        vom.m += sip - som;\n        ancestor = v;\n      }\n    }\n    return ancestor;\n  }\n\n  function sizeNode(node) {\n    node.x *= dx;\n    node.y = node.depth * dy;\n  }\n\n  tree.separation = function(x) {\n    return arguments.length ? (separation = x, tree) : separation;\n  };\n\n  tree.size = function(x) {\n    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], tree) : (nodeSize ? null : [dx, dy]);\n  };\n\n  tree.nodeSize = function(x) {\n    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], tree) : (nodeSize ? [dx, dy] : null);\n  };\n\n  return tree;\n};\n\nvar treemapSlice = function(parent, x0, y0, x1, y1) {\n  var nodes = parent.children,\n      node,\n      i = -1,\n      n = nodes.length,\n      k = parent.value && (y1 - y0) / parent.value;\n\n  while (++i < n) {\n    node = nodes[i], node.x0 = x0, node.x1 = x1;\n    node.y0 = y0, node.y1 = y0 += node.value * k;\n  }\n};\n\nvar phi = (1 + Math.sqrt(5)) / 2;\n\nfunction squarifyRatio(ratio, parent, x0, y0, x1, y1) {\n  var rows = [],\n      nodes = parent.children,\n      row,\n      nodeValue,\n      i0 = 0,\n      i1 = 0,\n      n = nodes.length,\n      dx, dy,\n      value = parent.value,\n      sumValue,\n      minValue,\n      maxValue,\n      newRatio,\n      minRatio,\n      alpha,\n      beta;\n\n  while (i0 < n) {\n    dx = x1 - x0, dy = y1 - y0;\n\n    // Find the next non-empty node.\n    do sumValue = nodes[i1++].value; while (!sumValue && i1 < n);\n    minValue = maxValue = sumValue;\n    alpha = Math.max(dy / dx, dx / dy) / (value * ratio);\n    beta = sumValue * sumValue * alpha;\n    minRatio = Math.max(maxValue / beta, beta / minValue);\n\n    // Keep adding nodes while the aspect ratio maintains or improves.\n    for (; i1 < n; ++i1) {\n      sumValue += nodeValue = nodes[i1].value;\n      if (nodeValue < minValue) minValue = nodeValue;\n      if (nodeValue > maxValue) maxValue = nodeValue;\n      beta = sumValue * sumValue * alpha;\n      newRatio = Math.max(maxValue / beta, beta / minValue);\n      if (newRatio > minRatio) { sumValue -= nodeValue; break; }\n      minRatio = newRatio;\n    }\n\n    // Position and record the row orientation.\n    rows.push(row = {value: sumValue, dice: dx < dy, children: nodes.slice(i0, i1)});\n    if (row.dice) treemapDice(row, x0, y0, x1, value ? y0 += dy * sumValue / value : y1);\n    else treemapSlice(row, x0, y0, value ? x0 += dx * sumValue / value : x1, y1);\n    value -= sumValue, i0 = i1;\n  }\n\n  return rows;\n}\n\nvar squarify = (function custom(ratio) {\n\n  function squarify(parent, x0, y0, x1, y1) {\n    squarifyRatio(ratio, parent, x0, y0, x1, y1);\n  }\n\n  squarify.ratio = function(x) {\n    return custom((x = +x) > 1 ? x : 1);\n  };\n\n  return squarify;\n})(phi);\n\nvar index$1 = function() {\n  var tile = squarify,\n      round = false,\n      dx = 1,\n      dy = 1,\n      paddingStack = [0],\n      paddingInner = constantZero,\n      paddingTop = constantZero,\n      paddingRight = constantZero,\n      paddingBottom = constantZero,\n      paddingLeft = constantZero;\n\n  function treemap(root) {\n    root.x0 =\n    root.y0 = 0;\n    root.x1 = dx;\n    root.y1 = dy;\n    root.eachBefore(positionNode);\n    paddingStack = [0];\n    if (round) root.eachBefore(roundNode);\n    return root;\n  }\n\n  function positionNode(node) {\n    var p = paddingStack[node.depth],\n        x0 = node.x0 + p,\n        y0 = node.y0 + p,\n        x1 = node.x1 - p,\n        y1 = node.y1 - p;\n    if (x1 < x0) x0 = x1 = (x0 + x1) / 2;\n    if (y1 < y0) y0 = y1 = (y0 + y1) / 2;\n    node.x0 = x0;\n    node.y0 = y0;\n    node.x1 = x1;\n    node.y1 = y1;\n    if (node.children) {\n      p = paddingStack[node.depth + 1] = paddingInner(node) / 2;\n      x0 += paddingLeft(node) - p;\n      y0 += paddingTop(node) - p;\n      x1 -= paddingRight(node) - p;\n      y1 -= paddingBottom(node) - p;\n      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;\n      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;\n      tile(node, x0, y0, x1, y1);\n    }\n  }\n\n  treemap.round = function(x) {\n    return arguments.length ? (round = !!x, treemap) : round;\n  };\n\n  treemap.size = function(x) {\n    return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy];\n  };\n\n  treemap.tile = function(x) {\n    return arguments.length ? (tile = required(x), treemap) : tile;\n  };\n\n  treemap.padding = function(x) {\n    return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner();\n  };\n\n  treemap.paddingInner = function(x) {\n    return arguments.length ? (paddingInner = typeof x === \"function\" ? x : constant$6(+x), treemap) : paddingInner;\n  };\n\n  treemap.paddingOuter = function(x) {\n    return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop();\n  };\n\n  treemap.paddingTop = function(x) {\n    return arguments.length ? (paddingTop = typeof x === \"function\" ? x : constant$6(+x), treemap) : paddingTop;\n  };\n\n  treemap.paddingRight = function(x) {\n    return arguments.length ? (paddingRight = typeof x === \"function\" ? x : constant$6(+x), treemap) : paddingRight;\n  };\n\n  treemap.paddingBottom = function(x) {\n    return arguments.length ? (paddingBottom = typeof x === \"function\" ? x : constant$6(+x), treemap) : paddingBottom;\n  };\n\n  treemap.paddingLeft = function(x) {\n    return arguments.length ? (paddingLeft = typeof x === \"function\" ? x : constant$6(+x), treemap) : paddingLeft;\n  };\n\n  return treemap;\n};\n\nvar binary = function(parent, x0, y0, x1, y1) {\n  var nodes = parent.children,\n      i, n = nodes.length,\n      sum, sums = new Array(n + 1);\n\n  for (sums[0] = sum = i = 0; i < n; ++i) {\n    sums[i + 1] = sum += nodes[i].value;\n  }\n\n  partition(0, n, parent.value, x0, y0, x1, y1);\n\n  function partition(i, j, value, x0, y0, x1, y1) {\n    if (i >= j - 1) {\n      var node = nodes[i];\n      node.x0 = x0, node.y0 = y0;\n      node.x1 = x1, node.y1 = y1;\n      return;\n    }\n\n    var valueOffset = sums[i],\n        valueTarget = (value / 2) + valueOffset,\n        k = i + 1,\n        hi = j - 1;\n\n    while (k < hi) {\n      var mid = k + hi >>> 1;\n      if (sums[mid] < valueTarget) k = mid + 1;\n      else hi = mid;\n    }\n\n    var valueLeft = sums[k] - valueOffset,\n        valueRight = value - valueLeft;\n\n    if ((y1 - y0) > (x1 - x0)) {\n      var yk = (y0 * valueRight + y1 * valueLeft) / value;\n      partition(i, k, valueLeft, x0, y0, x1, yk);\n      partition(k, j, valueRight, x0, yk, x1, y1);\n    } else {\n      var xk = (x0 * valueRight + x1 * valueLeft) / value;\n      partition(i, k, valueLeft, x0, y0, xk, y1);\n      partition(k, j, valueRight, xk, y0, x1, y1);\n    }\n  }\n};\n\nvar sliceDice = function(parent, x0, y0, x1, y1) {\n  (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1);\n};\n\nvar resquarify = (function custom(ratio) {\n\n  function resquarify(parent, x0, y0, x1, y1) {\n    if ((rows = parent._squarify) && (rows.ratio === ratio)) {\n      var rows,\n          row,\n          nodes,\n          i,\n          j = -1,\n          n,\n          m = rows.length,\n          value = parent.value;\n\n      while (++j < m) {\n        row = rows[j], nodes = row.children;\n        for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value;\n        if (row.dice) treemapDice(row, x0, y0, x1, y0 += (y1 - y0) * row.value / value);\n        else treemapSlice(row, x0, y0, x0 += (x1 - x0) * row.value / value, y1);\n        value -= row.value;\n      }\n    } else {\n      parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1);\n      rows.ratio = ratio;\n    }\n  }\n\n  resquarify.ratio = function(x) {\n    return custom((x = +x) > 1 ? x : 1);\n  };\n\n  return resquarify;\n})(phi);\n\nvar center$1 = function(x, y) {\n  var nodes;\n\n  if (x == null) x = 0;\n  if (y == null) y = 0;\n\n  function force() {\n    var i,\n        n = nodes.length,\n        node,\n        sx = 0,\n        sy = 0;\n\n    for (i = 0; i < n; ++i) {\n      node = nodes[i], sx += node.x, sy += node.y;\n    }\n\n    for (sx = sx / n - x, sy = sy / n - y, i = 0; i < n; ++i) {\n      node = nodes[i], node.x -= sx, node.y -= sy;\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n  };\n\n  force.x = function(_) {\n    return arguments.length ? (x = +_, force) : x;\n  };\n\n  force.y = function(_) {\n    return arguments.length ? (y = +_, force) : y;\n  };\n\n  return force;\n};\n\nvar constant$7 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar jiggle = function() {\n  return (Math.random() - 0.5) * 1e-6;\n};\n\nfunction x$1(d) {\n  return d.x + d.vx;\n}\n\nfunction y$1(d) {\n  return d.y + d.vy;\n}\n\nvar collide = function(radius) {\n  var nodes,\n      radii,\n      strength = 1,\n      iterations = 1;\n\n  if (typeof radius !== \"function\") radius = constant$7(radius == null ? 1 : +radius);\n\n  function force() {\n    var i, n = nodes.length,\n        tree,\n        node,\n        xi,\n        yi,\n        ri,\n        ri2;\n\n    for (var k = 0; k < iterations; ++k) {\n      tree = quadtree(nodes, x$1, y$1).visitAfter(prepare);\n      for (i = 0; i < n; ++i) {\n        node = nodes[i];\n        ri = radii[node.index], ri2 = ri * ri;\n        xi = node.x + node.vx;\n        yi = node.y + node.vy;\n        tree.visit(apply);\n      }\n    }\n\n    function apply(quad, x0, y0, x1, y1) {\n      var data = quad.data, rj = quad.r, r = ri + rj;\n      if (data) {\n        if (data.index > node.index) {\n          var x = xi - data.x - data.vx,\n              y = yi - data.y - data.vy,\n              l = x * x + y * y;\n          if (l < r * r) {\n            if (x === 0) x = jiggle(), l += x * x;\n            if (y === 0) y = jiggle(), l += y * y;\n            l = (r - (l = Math.sqrt(l))) / l * strength;\n            node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj));\n            node.vy += (y *= l) * r;\n            data.vx -= x * (r = 1 - r);\n            data.vy -= y * r;\n          }\n        }\n        return;\n      }\n      return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r;\n    }\n  }\n\n  function prepare(quad) {\n    if (quad.data) return quad.r = radii[quad.data.index];\n    for (var i = quad.r = 0; i < 4; ++i) {\n      if (quad[i] && quad[i].r > quad.r) {\n        quad.r = quad[i].r;\n      }\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length, node;\n    radii = new Array(n);\n    for (i = 0; i < n; ++i) node = nodes[i], radii[node.index] = +radius(node, i, nodes);\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.iterations = function(_) {\n    return arguments.length ? (iterations = +_, force) : iterations;\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = +_, force) : strength;\n  };\n\n  force.radius = function(_) {\n    return arguments.length ? (radius = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : radius;\n  };\n\n  return force;\n};\n\nfunction index$2(d) {\n  return d.index;\n}\n\nfunction find(nodeById, nodeId) {\n  var node = nodeById.get(nodeId);\n  if (!node) throw new Error(\"missing: \" + nodeId);\n  return node;\n}\n\nvar link = function(links) {\n  var id = index$2,\n      strength = defaultStrength,\n      strengths,\n      distance = constant$7(30),\n      distances,\n      nodes,\n      count,\n      bias,\n      iterations = 1;\n\n  if (links == null) links = [];\n\n  function defaultStrength(link) {\n    return 1 / Math.min(count[link.source.index], count[link.target.index]);\n  }\n\n  function force(alpha) {\n    for (var k = 0, n = links.length; k < iterations; ++k) {\n      for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {\n        link = links[i], source = link.source, target = link.target;\n        x = target.x + target.vx - source.x - source.vx || jiggle();\n        y = target.y + target.vy - source.y - source.vy || jiggle();\n        l = Math.sqrt(x * x + y * y);\n        l = (l - distances[i]) / l * alpha * strengths[i];\n        x *= l, y *= l;\n        target.vx -= x * (b = bias[i]);\n        target.vy -= y * b;\n        source.vx += x * (b = 1 - b);\n        source.vy += y * b;\n      }\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n\n    var i,\n        n = nodes.length,\n        m = links.length,\n        nodeById = map$1(nodes, id),\n        link;\n\n    for (i = 0, count = new Array(n); i < m; ++i) {\n      link = links[i], link.index = i;\n      if (typeof link.source !== \"object\") link.source = find(nodeById, link.source);\n      if (typeof link.target !== \"object\") link.target = find(nodeById, link.target);\n      count[link.source.index] = (count[link.source.index] || 0) + 1;\n      count[link.target.index] = (count[link.target.index] || 0) + 1;\n    }\n\n    for (i = 0, bias = new Array(m); i < m; ++i) {\n      link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);\n    }\n\n    strengths = new Array(m), initializeStrength();\n    distances = new Array(m), initializeDistance();\n  }\n\n  function initializeStrength() {\n    if (!nodes) return;\n\n    for (var i = 0, n = links.length; i < n; ++i) {\n      strengths[i] = +strength(links[i], i, links);\n    }\n  }\n\n  function initializeDistance() {\n    if (!nodes) return;\n\n    for (var i = 0, n = links.length; i < n; ++i) {\n      distances[i] = +distance(links[i], i, links);\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.links = function(_) {\n    return arguments.length ? (links = _, initialize(), force) : links;\n  };\n\n  force.id = function(_) {\n    return arguments.length ? (id = _, force) : id;\n  };\n\n  force.iterations = function(_) {\n    return arguments.length ? (iterations = +_, force) : iterations;\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$7(+_), initializeStrength(), force) : strength;\n  };\n\n  force.distance = function(_) {\n    return arguments.length ? (distance = typeof _ === \"function\" ? _ : constant$7(+_), initializeDistance(), force) : distance;\n  };\n\n  return force;\n};\n\nfunction x$2(d) {\n  return d.x;\n}\n\nfunction y$2(d) {\n  return d.y;\n}\n\nvar initialRadius = 10;\nvar initialAngle = Math.PI * (3 - Math.sqrt(5));\n\nvar simulation = function(nodes) {\n  var simulation,\n      alpha = 1,\n      alphaMin = 0.001,\n      alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),\n      alphaTarget = 0,\n      velocityDecay = 0.6,\n      forces = map$1(),\n      stepper = timer(step),\n      event = dispatch(\"tick\", \"end\");\n\n  if (nodes == null) nodes = [];\n\n  function step() {\n    tick();\n    event.call(\"tick\", simulation);\n    if (alpha < alphaMin) {\n      stepper.stop();\n      event.call(\"end\", simulation);\n    }\n  }\n\n  function tick() {\n    var i, n = nodes.length, node;\n\n    alpha += (alphaTarget - alpha) * alphaDecay;\n\n    forces.each(function(force) {\n      force(alpha);\n    });\n\n    for (i = 0; i < n; ++i) {\n      node = nodes[i];\n      if (node.fx == null) node.x += node.vx *= velocityDecay;\n      else node.x = node.fx, node.vx = 0;\n      if (node.fy == null) node.y += node.vy *= velocityDecay;\n      else node.y = node.fy, node.vy = 0;\n    }\n  }\n\n  function initializeNodes() {\n    for (var i = 0, n = nodes.length, node; i < n; ++i) {\n      node = nodes[i], node.index = i;\n      if (isNaN(node.x) || isNaN(node.y)) {\n        var radius = initialRadius * Math.sqrt(i), angle = i * initialAngle;\n        node.x = radius * Math.cos(angle);\n        node.y = radius * Math.sin(angle);\n      }\n      if (isNaN(node.vx) || isNaN(node.vy)) {\n        node.vx = node.vy = 0;\n      }\n    }\n  }\n\n  function initializeForce(force) {\n    if (force.initialize) force.initialize(nodes);\n    return force;\n  }\n\n  initializeNodes();\n\n  return simulation = {\n    tick: tick,\n\n    restart: function() {\n      return stepper.restart(step), simulation;\n    },\n\n    stop: function() {\n      return stepper.stop(), simulation;\n    },\n\n    nodes: function(_) {\n      return arguments.length ? (nodes = _, initializeNodes(), forces.each(initializeForce), simulation) : nodes;\n    },\n\n    alpha: function(_) {\n      return arguments.length ? (alpha = +_, simulation) : alpha;\n    },\n\n    alphaMin: function(_) {\n      return arguments.length ? (alphaMin = +_, simulation) : alphaMin;\n    },\n\n    alphaDecay: function(_) {\n      return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;\n    },\n\n    alphaTarget: function(_) {\n      return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;\n    },\n\n    velocityDecay: function(_) {\n      return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;\n    },\n\n    force: function(name, _) {\n      return arguments.length > 1 ? ((_ == null ? forces.remove(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);\n    },\n\n    find: function(x, y, radius) {\n      var i = 0,\n          n = nodes.length,\n          dx,\n          dy,\n          d2,\n          node,\n          closest;\n\n      if (radius == null) radius = Infinity;\n      else radius *= radius;\n\n      for (i = 0; i < n; ++i) {\n        node = nodes[i];\n        dx = x - node.x;\n        dy = y - node.y;\n        d2 = dx * dx + dy * dy;\n        if (d2 < radius) closest = node, radius = d2;\n      }\n\n      return closest;\n    },\n\n    on: function(name, _) {\n      return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);\n    }\n  };\n};\n\nvar manyBody = function() {\n  var nodes,\n      node,\n      alpha,\n      strength = constant$7(-30),\n      strengths,\n      distanceMin2 = 1,\n      distanceMax2 = Infinity,\n      theta2 = 0.81;\n\n  function force(_) {\n    var i, n = nodes.length, tree = quadtree(nodes, x$2, y$2).visitAfter(accumulate);\n    for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length, node;\n    strengths = new Array(n);\n    for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes);\n  }\n\n  function accumulate(quad) {\n    var strength = 0, q, c, x$$1, y$$1, i;\n\n    // For internal nodes, accumulate forces from child quadrants.\n    if (quad.length) {\n      for (x$$1 = y$$1 = i = 0; i < 4; ++i) {\n        if ((q = quad[i]) && (c = q.value)) {\n          strength += c, x$$1 += c * q.x, y$$1 += c * q.y;\n        }\n      }\n      quad.x = x$$1 / strength;\n      quad.y = y$$1 / strength;\n    }\n\n    // For leaf nodes, accumulate forces from coincident quadrants.\n    else {\n      q = quad;\n      q.x = q.data.x;\n      q.y = q.data.y;\n      do strength += strengths[q.data.index];\n      while (q = q.next);\n    }\n\n    quad.value = strength;\n  }\n\n  function apply(quad, x1, _, x2) {\n    if (!quad.value) return true;\n\n    var x$$1 = quad.x - node.x,\n        y$$1 = quad.y - node.y,\n        w = x2 - x1,\n        l = x$$1 * x$$1 + y$$1 * y$$1;\n\n    // Apply the Barnes-Hut approximation if possible.\n    // Limit forces for very close nodes; randomize direction if coincident.\n    if (w * w / theta2 < l) {\n      if (l < distanceMax2) {\n        if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1;\n        if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1;\n        if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);\n        node.vx += x$$1 * quad.value * alpha / l;\n        node.vy += y$$1 * quad.value * alpha / l;\n      }\n      return true;\n    }\n\n    // Otherwise, process points directly.\n    else if (quad.length || l >= distanceMax2) return;\n\n    // Limit forces for very close nodes; randomize direction if coincident.\n    if (quad.data !== node || quad.next) {\n      if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1;\n      if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1;\n      if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);\n    }\n\n    do if (quad.data !== node) {\n      w = strengths[quad.data.index] * alpha / l;\n      node.vx += x$$1 * w;\n      node.vy += y$$1 * w;\n    } while (quad = quad.next);\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : strength;\n  };\n\n  force.distanceMin = function(_) {\n    return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);\n  };\n\n  force.distanceMax = function(_) {\n    return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);\n  };\n\n  force.theta = function(_) {\n    return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);\n  };\n\n  return force;\n};\n\nvar x$3 = function(x) {\n  var strength = constant$7(0.1),\n      nodes,\n      strengths,\n      xz;\n\n  if (typeof x !== \"function\") x = constant$7(x == null ? 0 : +x);\n\n  function force(alpha) {\n    for (var i = 0, n = nodes.length, node; i < n; ++i) {\n      node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha;\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length;\n    strengths = new Array(n);\n    xz = new Array(n);\n    for (i = 0; i < n; ++i) {\n      strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : strength;\n  };\n\n  force.x = function(_) {\n    return arguments.length ? (x = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : x;\n  };\n\n  return force;\n};\n\nvar y$3 = function(y) {\n  var strength = constant$7(0.1),\n      nodes,\n      strengths,\n      yz;\n\n  if (typeof y !== \"function\") y = constant$7(y == null ? 0 : +y);\n\n  function force(alpha) {\n    for (var i = 0, n = nodes.length, node; i < n; ++i) {\n      node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha;\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length;\n    strengths = new Array(n);\n    yz = new Array(n);\n    for (i = 0; i < n; ++i) {\n      strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : strength;\n  };\n\n  force.y = function(_) {\n    return arguments.length ? (y = typeof _ === \"function\" ? _ : constant$7(+_), initialize(), force) : y;\n  };\n\n  return force;\n};\n\nfunction nopropagation() {\n  exports.event.stopImmediatePropagation();\n}\n\nvar noevent = function() {\n  exports.event.preventDefault();\n  exports.event.stopImmediatePropagation();\n};\n\nvar dragDisable = function(view) {\n  var root = view.document.documentElement,\n      selection$$1 = select(view).on(\"dragstart.drag\", noevent, true);\n  if (\"onselectstart\" in root) {\n    selection$$1.on(\"selectstart.drag\", noevent, true);\n  } else {\n    root.__noselect = root.style.MozUserSelect;\n    root.style.MozUserSelect = \"none\";\n  }\n};\n\nfunction yesdrag(view, noclick) {\n  var root = view.document.documentElement,\n      selection$$1 = select(view).on(\"dragstart.drag\", null);\n  if (noclick) {\n    selection$$1.on(\"click.drag\", noevent, true);\n    setTimeout(function() { selection$$1.on(\"click.drag\", null); }, 0);\n  }\n  if (\"onselectstart\" in root) {\n    selection$$1.on(\"selectstart.drag\", null);\n  } else {\n    root.style.MozUserSelect = root.__noselect;\n    delete root.__noselect;\n  }\n}\n\nvar constant$8 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nfunction DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {\n  this.target = target;\n  this.type = type;\n  this.subject = subject;\n  this.identifier = id;\n  this.active = active;\n  this.x = x;\n  this.y = y;\n  this.dx = dx;\n  this.dy = dy;\n  this._ = dispatch;\n}\n\nDragEvent.prototype.on = function() {\n  var value = this._.on.apply(this._, arguments);\n  return value === this._ ? this : value;\n};\n\n// Ignore right-click, since that should open the context menu.\nfunction defaultFilter() {\n  return !exports.event.button;\n}\n\nfunction defaultContainer() {\n  return this.parentNode;\n}\n\nfunction defaultSubject(d) {\n  return d == null ? {x: exports.event.x, y: exports.event.y} : d;\n}\n\nvar drag = function() {\n  var filter = defaultFilter,\n      container = defaultContainer,\n      subject = defaultSubject,\n      gestures = {},\n      listeners = dispatch(\"start\", \"drag\", \"end\"),\n      active = 0,\n      mousemoving,\n      touchending;\n\n  function drag(selection$$1) {\n    selection$$1\n        .on(\"mousedown.drag\", mousedowned)\n        .on(\"touchstart.drag\", touchstarted)\n        .on(\"touchmove.drag\", touchmoved)\n        .on(\"touchend.drag touchcancel.drag\", touchended)\n        .style(\"-webkit-tap-highlight-color\", \"rgba(0,0,0,0)\");\n  }\n\n  function mousedowned() {\n    if (touchending || !filter.apply(this, arguments)) return;\n    var gesture = beforestart(\"mouse\", container.apply(this, arguments), mouse, this, arguments);\n    if (!gesture) return;\n    select(exports.event.view).on(\"mousemove.drag\", mousemoved, true).on(\"mouseup.drag\", mouseupped, true);\n    dragDisable(exports.event.view);\n    nopropagation();\n    mousemoving = false;\n    gesture(\"start\");\n  }\n\n  function mousemoved() {\n    noevent();\n    mousemoving = true;\n    gestures.mouse(\"drag\");\n  }\n\n  function mouseupped() {\n    select(exports.event.view).on(\"mousemove.drag mouseup.drag\", null);\n    yesdrag(exports.event.view, mousemoving);\n    noevent();\n    gestures.mouse(\"end\");\n  }\n\n  function touchstarted() {\n    if (!filter.apply(this, arguments)) return;\n    var touches$$1 = exports.event.changedTouches,\n        c = container.apply(this, arguments),\n        n = touches$$1.length, i, gesture;\n\n    for (i = 0; i < n; ++i) {\n      if (gesture = beforestart(touches$$1[i].identifier, c, touch, this, arguments)) {\n        nopropagation();\n        gesture(\"start\");\n      }\n    }\n  }\n\n  function touchmoved() {\n    var touches$$1 = exports.event.changedTouches,\n        n = touches$$1.length, i, gesture;\n\n    for (i = 0; i < n; ++i) {\n      if (gesture = gestures[touches$$1[i].identifier]) {\n        noevent();\n        gesture(\"drag\");\n      }\n    }\n  }\n\n  function touchended() {\n    var touches$$1 = exports.event.changedTouches,\n        n = touches$$1.length, i, gesture;\n\n    if (touchending) clearTimeout(touchending);\n    touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!\n    for (i = 0; i < n; ++i) {\n      if (gesture = gestures[touches$$1[i].identifier]) {\n        nopropagation();\n        gesture(\"end\");\n      }\n    }\n  }\n\n  function beforestart(id, container, point, that, args) {\n    var p = point(container, id), s, dx, dy,\n        sublisteners = listeners.copy();\n\n    if (!customEvent(new DragEvent(drag, \"beforestart\", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {\n      if ((exports.event.subject = s = subject.apply(that, args)) == null) return false;\n      dx = s.x - p[0] || 0;\n      dy = s.y - p[1] || 0;\n      return true;\n    })) return;\n\n    return function gesture(type) {\n      var p0 = p, n;\n      switch (type) {\n        case \"start\": gestures[id] = gesture, n = active++; break;\n        case \"end\": delete gestures[id], --active; // nobreak\n        case \"drag\": p = point(container, id), n = active; break;\n      }\n      customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);\n    };\n  }\n\n  drag.filter = function(_) {\n    return arguments.length ? (filter = typeof _ === \"function\" ? _ : constant$8(!!_), drag) : filter;\n  };\n\n  drag.container = function(_) {\n    return arguments.length ? (container = typeof _ === \"function\" ? _ : constant$8(_), drag) : container;\n  };\n\n  drag.subject = function(_) {\n    return arguments.length ? (subject = typeof _ === \"function\" ? _ : constant$8(_), drag) : subject;\n  };\n\n  drag.on = function() {\n    var value = listeners.on.apply(listeners, arguments);\n    return value === listeners ? drag : value;\n  };\n\n  return drag;\n};\n\nvar constant$9 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nfunction x$4(d) {\n  return d[0];\n}\n\nfunction y$4(d) {\n  return d[1];\n}\n\nfunction RedBlackTree() {\n  this._ = null; // root node\n}\n\nfunction RedBlackNode(node) {\n  node.U = // parent node\n  node.C = // color - true for red, false for black\n  node.L = // left node\n  node.R = // right node\n  node.P = // previous node\n  node.N = null; // next node\n}\n\nRedBlackTree.prototype = {\n  constructor: RedBlackTree,\n\n  insert: function(after, node) {\n    var parent, grandpa, uncle;\n\n    if (after) {\n      node.P = after;\n      node.N = after.N;\n      if (after.N) after.N.P = node;\n      after.N = node;\n      if (after.R) {\n        after = after.R;\n        while (after.L) after = after.L;\n        after.L = node;\n      } else {\n        after.R = node;\n      }\n      parent = after;\n    } else if (this._) {\n      after = RedBlackFirst(this._);\n      node.P = null;\n      node.N = after;\n      after.P = after.L = node;\n      parent = after;\n    } else {\n      node.P = node.N = null;\n      this._ = node;\n      parent = null;\n    }\n    node.L = node.R = null;\n    node.U = parent;\n    node.C = true;\n\n    after = node;\n    while (parent && parent.C) {\n      grandpa = parent.U;\n      if (parent === grandpa.L) {\n        uncle = grandpa.R;\n        if (uncle && uncle.C) {\n          parent.C = uncle.C = false;\n          grandpa.C = true;\n          after = grandpa;\n        } else {\n          if (after === parent.R) {\n            RedBlackRotateLeft(this, parent);\n            after = parent;\n            parent = after.U;\n          }\n          parent.C = false;\n          grandpa.C = true;\n          RedBlackRotateRight(this, grandpa);\n        }\n      } else {\n        uncle = grandpa.L;\n        if (uncle && uncle.C) {\n          parent.C = uncle.C = false;\n          grandpa.C = true;\n          after = grandpa;\n        } else {\n          if (after === parent.L) {\n            RedBlackRotateRight(this, parent);\n            after = parent;\n            parent = after.U;\n          }\n          parent.C = false;\n          grandpa.C = true;\n          RedBlackRotateLeft(this, grandpa);\n        }\n      }\n      parent = after.U;\n    }\n    this._.C = false;\n  },\n\n  remove: function(node) {\n    if (node.N) node.N.P = node.P;\n    if (node.P) node.P.N = node.N;\n    node.N = node.P = null;\n\n    var parent = node.U,\n        sibling,\n        left = node.L,\n        right = node.R,\n        next,\n        red;\n\n    if (!left) next = right;\n    else if (!right) next = left;\n    else next = RedBlackFirst(right);\n\n    if (parent) {\n      if (parent.L === node) parent.L = next;\n      else parent.R = next;\n    } else {\n      this._ = next;\n    }\n\n    if (left && right) {\n      red = next.C;\n      next.C = node.C;\n      next.L = left;\n      left.U = next;\n      if (next !== right) {\n        parent = next.U;\n        next.U = node.U;\n        node = next.R;\n        parent.L = node;\n        next.R = right;\n        right.U = next;\n      } else {\n        next.U = parent;\n        parent = next;\n        node = next.R;\n      }\n    } else {\n      red = node.C;\n      node = next;\n    }\n\n    if (node) node.U = parent;\n    if (red) return;\n    if (node && node.C) { node.C = false; return; }\n\n    do {\n      if (node === this._) break;\n      if (node === parent.L) {\n        sibling = parent.R;\n        if (sibling.C) {\n          sibling.C = false;\n          parent.C = true;\n          RedBlackRotateLeft(this, parent);\n          sibling = parent.R;\n        }\n        if ((sibling.L && sibling.L.C)\n            || (sibling.R && sibling.R.C)) {\n          if (!sibling.R || !sibling.R.C) {\n            sibling.L.C = false;\n            sibling.C = true;\n            RedBlackRotateRight(this, sibling);\n            sibling = parent.R;\n          }\n          sibling.C = parent.C;\n          parent.C = sibling.R.C = false;\n          RedBlackRotateLeft(this, parent);\n          node = this._;\n          break;\n        }\n      } else {\n        sibling = parent.L;\n        if (sibling.C) {\n          sibling.C = false;\n          parent.C = true;\n          RedBlackRotateRight(this, parent);\n          sibling = parent.L;\n        }\n        if ((sibling.L && sibling.L.C)\n          || (sibling.R && sibling.R.C)) {\n          if (!sibling.L || !sibling.L.C) {\n            sibling.R.C = false;\n            sibling.C = true;\n            RedBlackRotateLeft(this, sibling);\n            sibling = parent.L;\n          }\n          sibling.C = parent.C;\n          parent.C = sibling.L.C = false;\n          RedBlackRotateRight(this, parent);\n          node = this._;\n          break;\n        }\n      }\n      sibling.C = true;\n      node = parent;\n      parent = parent.U;\n    } while (!node.C);\n\n    if (node) node.C = false;\n  }\n};\n\nfunction RedBlackRotateLeft(tree, node) {\n  var p = node,\n      q = node.R,\n      parent = p.U;\n\n  if (parent) {\n    if (parent.L === p) parent.L = q;\n    else parent.R = q;\n  } else {\n    tree._ = q;\n  }\n\n  q.U = parent;\n  p.U = q;\n  p.R = q.L;\n  if (p.R) p.R.U = p;\n  q.L = p;\n}\n\nfunction RedBlackRotateRight(tree, node) {\n  var p = node,\n      q = node.L,\n      parent = p.U;\n\n  if (parent) {\n    if (parent.L === p) parent.L = q;\n    else parent.R = q;\n  } else {\n    tree._ = q;\n  }\n\n  q.U = parent;\n  p.U = q;\n  p.L = q.R;\n  if (p.L) p.L.U = p;\n  q.R = p;\n}\n\nfunction RedBlackFirst(node) {\n  while (node.L) node = node.L;\n  return node;\n}\n\nfunction createEdge(left, right, v0, v1) {\n  var edge = [null, null],\n      index = edges.push(edge) - 1;\n  edge.left = left;\n  edge.right = right;\n  if (v0) setEdgeEnd(edge, left, right, v0);\n  if (v1) setEdgeEnd(edge, right, left, v1);\n  cells[left.index].halfedges.push(index);\n  cells[right.index].halfedges.push(index);\n  return edge;\n}\n\nfunction createBorderEdge(left, v0, v1) {\n  var edge = [v0, v1];\n  edge.left = left;\n  return edge;\n}\n\nfunction setEdgeEnd(edge, left, right, vertex) {\n  if (!edge[0] && !edge[1]) {\n    edge[0] = vertex;\n    edge.left = left;\n    edge.right = right;\n  } else if (edge.left === right) {\n    edge[1] = vertex;\n  } else {\n    edge[0] = vertex;\n  }\n}\n\n// Liang–Barsky line clipping.\nfunction clipEdge(edge, x0, y0, x1, y1) {\n  var a = edge[0],\n      b = edge[1],\n      ax = a[0],\n      ay = a[1],\n      bx = b[0],\n      by = b[1],\n      t0 = 0,\n      t1 = 1,\n      dx = bx - ax,\n      dy = by - ay,\n      r;\n\n  r = x0 - ax;\n  if (!dx && r > 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dx > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = x1 - ax;\n  if (!dx && r < 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dx > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  r = y0 - ay;\n  if (!dy && r > 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dy > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = y1 - ay;\n  if (!dy && r < 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dy > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  if (!(t0 > 0) && !(t1 < 1)) return true; // TODO Better check?\n\n  if (t0 > 0) edge[0] = [ax + t0 * dx, ay + t0 * dy];\n  if (t1 < 1) edge[1] = [ax + t1 * dx, ay + t1 * dy];\n  return true;\n}\n\nfunction connectEdge(edge, x0, y0, x1, y1) {\n  var v1 = edge[1];\n  if (v1) return true;\n\n  var v0 = edge[0],\n      left = edge.left,\n      right = edge.right,\n      lx = left[0],\n      ly = left[1],\n      rx = right[0],\n      ry = right[1],\n      fx = (lx + rx) / 2,\n      fy = (ly + ry) / 2,\n      fm,\n      fb;\n\n  if (ry === ly) {\n    if (fx < x0 || fx >= x1) return;\n    if (lx > rx) {\n      if (!v0) v0 = [fx, y0];\n      else if (v0[1] >= y1) return;\n      v1 = [fx, y1];\n    } else {\n      if (!v0) v0 = [fx, y1];\n      else if (v0[1] < y0) return;\n      v1 = [fx, y0];\n    }\n  } else {\n    fm = (lx - rx) / (ry - ly);\n    fb = fy - fm * fx;\n    if (fm < -1 || fm > 1) {\n      if (lx > rx) {\n        if (!v0) v0 = [(y0 - fb) / fm, y0];\n        else if (v0[1] >= y1) return;\n        v1 = [(y1 - fb) / fm, y1];\n      } else {\n        if (!v0) v0 = [(y1 - fb) / fm, y1];\n        else if (v0[1] < y0) return;\n        v1 = [(y0 - fb) / fm, y0];\n      }\n    } else {\n      if (ly < ry) {\n        if (!v0) v0 = [x0, fm * x0 + fb];\n        else if (v0[0] >= x1) return;\n        v1 = [x1, fm * x1 + fb];\n      } else {\n        if (!v0) v0 = [x1, fm * x1 + fb];\n        else if (v0[0] < x0) return;\n        v1 = [x0, fm * x0 + fb];\n      }\n    }\n  }\n\n  edge[0] = v0;\n  edge[1] = v1;\n  return true;\n}\n\nfunction clipEdges(x0, y0, x1, y1) {\n  var i = edges.length,\n      edge;\n\n  while (i--) {\n    if (!connectEdge(edge = edges[i], x0, y0, x1, y1)\n        || !clipEdge(edge, x0, y0, x1, y1)\n        || !(Math.abs(edge[0][0] - edge[1][0]) > epsilon$3\n            || Math.abs(edge[0][1] - edge[1][1]) > epsilon$3)) {\n      delete edges[i];\n    }\n  }\n}\n\nfunction createCell(site) {\n  return cells[site.index] = {\n    site: site,\n    halfedges: []\n  };\n}\n\nfunction cellHalfedgeAngle(cell, edge) {\n  var site = cell.site,\n      va = edge.left,\n      vb = edge.right;\n  if (site === vb) vb = va, va = site;\n  if (vb) return Math.atan2(vb[1] - va[1], vb[0] - va[0]);\n  if (site === va) va = edge[1], vb = edge[0];\n  else va = edge[0], vb = edge[1];\n  return Math.atan2(va[0] - vb[0], vb[1] - va[1]);\n}\n\nfunction cellHalfedgeStart(cell, edge) {\n  return edge[+(edge.left !== cell.site)];\n}\n\nfunction cellHalfedgeEnd(cell, edge) {\n  return edge[+(edge.left === cell.site)];\n}\n\nfunction sortCellHalfedges() {\n  for (var i = 0, n = cells.length, cell, halfedges, j, m; i < n; ++i) {\n    if ((cell = cells[i]) && (m = (halfedges = cell.halfedges).length)) {\n      var index = new Array(m),\n          array = new Array(m);\n      for (j = 0; j < m; ++j) index[j] = j, array[j] = cellHalfedgeAngle(cell, edges[halfedges[j]]);\n      index.sort(function(i, j) { return array[j] - array[i]; });\n      for (j = 0; j < m; ++j) array[j] = halfedges[index[j]];\n      for (j = 0; j < m; ++j) halfedges[j] = array[j];\n    }\n  }\n}\n\nfunction clipCells(x0, y0, x1, y1) {\n  var nCells = cells.length,\n      iCell,\n      cell,\n      site,\n      iHalfedge,\n      halfedges,\n      nHalfedges,\n      start,\n      startX,\n      startY,\n      end,\n      endX,\n      endY,\n      cover = true;\n\n  for (iCell = 0; iCell < nCells; ++iCell) {\n    if (cell = cells[iCell]) {\n      site = cell.site;\n      halfedges = cell.halfedges;\n      iHalfedge = halfedges.length;\n\n      // Remove any dangling clipped edges.\n      while (iHalfedge--) {\n        if (!edges[halfedges[iHalfedge]]) {\n          halfedges.splice(iHalfedge, 1);\n        }\n      }\n\n      // Insert any border edges as necessary.\n      iHalfedge = 0, nHalfedges = halfedges.length;\n      while (iHalfedge < nHalfedges) {\n        end = cellHalfedgeEnd(cell, edges[halfedges[iHalfedge]]), endX = end[0], endY = end[1];\n        start = cellHalfedgeStart(cell, edges[halfedges[++iHalfedge % nHalfedges]]), startX = start[0], startY = start[1];\n        if (Math.abs(endX - startX) > epsilon$3 || Math.abs(endY - startY) > epsilon$3) {\n          halfedges.splice(iHalfedge, 0, edges.push(createBorderEdge(site, end,\n              Math.abs(endX - x0) < epsilon$3 && y1 - endY > epsilon$3 ? [x0, Math.abs(startX - x0) < epsilon$3 ? startY : y1]\n              : Math.abs(endY - y1) < epsilon$3 && x1 - endX > epsilon$3 ? [Math.abs(startY - y1) < epsilon$3 ? startX : x1, y1]\n              : Math.abs(endX - x1) < epsilon$3 && endY - y0 > epsilon$3 ? [x1, Math.abs(startX - x1) < epsilon$3 ? startY : y0]\n              : Math.abs(endY - y0) < epsilon$3 && endX - x0 > epsilon$3 ? [Math.abs(startY - y0) < epsilon$3 ? startX : x0, y0]\n              : null)) - 1);\n          ++nHalfedges;\n        }\n      }\n\n      if (nHalfedges) cover = false;\n    }\n  }\n\n  // If there weren’t any edges, have the closest site cover the extent.\n  // It doesn’t matter which corner of the extent we measure!\n  if (cover) {\n    var dx, dy, d2, dc = Infinity;\n\n    for (iCell = 0, cover = null; iCell < nCells; ++iCell) {\n      if (cell = cells[iCell]) {\n        site = cell.site;\n        dx = site[0] - x0;\n        dy = site[1] - y0;\n        d2 = dx * dx + dy * dy;\n        if (d2 < dc) dc = d2, cover = cell;\n      }\n    }\n\n    if (cover) {\n      var v00 = [x0, y0], v01 = [x0, y1], v11 = [x1, y1], v10 = [x1, y0];\n      cover.halfedges.push(\n        edges.push(createBorderEdge(site = cover.site, v00, v01)) - 1,\n        edges.push(createBorderEdge(site, v01, v11)) - 1,\n        edges.push(createBorderEdge(site, v11, v10)) - 1,\n        edges.push(createBorderEdge(site, v10, v00)) - 1\n      );\n    }\n  }\n\n  // Lastly delete any cells with no edges; these were entirely clipped.\n  for (iCell = 0; iCell < nCells; ++iCell) {\n    if (cell = cells[iCell]) {\n      if (!cell.halfedges.length) {\n        delete cells[iCell];\n      }\n    }\n  }\n}\n\nvar circlePool = [];\n\nvar firstCircle;\n\nfunction Circle() {\n  RedBlackNode(this);\n  this.x =\n  this.y =\n  this.arc =\n  this.site =\n  this.cy = null;\n}\n\nfunction attachCircle(arc) {\n  var lArc = arc.P,\n      rArc = arc.N;\n\n  if (!lArc || !rArc) return;\n\n  var lSite = lArc.site,\n      cSite = arc.site,\n      rSite = rArc.site;\n\n  if (lSite === rSite) return;\n\n  var bx = cSite[0],\n      by = cSite[1],\n      ax = lSite[0] - bx,\n      ay = lSite[1] - by,\n      cx = rSite[0] - bx,\n      cy = rSite[1] - by;\n\n  var d = 2 * (ax * cy - ay * cx);\n  if (d >= -epsilon2$1) return;\n\n  var ha = ax * ax + ay * ay,\n      hc = cx * cx + cy * cy,\n      x = (cy * ha - ay * hc) / d,\n      y = (ax * hc - cx * ha) / d;\n\n  var circle = circlePool.pop() || new Circle;\n  circle.arc = arc;\n  circle.site = cSite;\n  circle.x = x + bx;\n  circle.y = (circle.cy = y + by) + Math.sqrt(x * x + y * y); // y bottom\n\n  arc.circle = circle;\n\n  var before = null,\n      node = circles._;\n\n  while (node) {\n    if (circle.y < node.y || (circle.y === node.y && circle.x <= node.x)) {\n      if (node.L) node = node.L;\n      else { before = node.P; break; }\n    } else {\n      if (node.R) node = node.R;\n      else { before = node; break; }\n    }\n  }\n\n  circles.insert(before, circle);\n  if (!before) firstCircle = circle;\n}\n\nfunction detachCircle(arc) {\n  var circle = arc.circle;\n  if (circle) {\n    if (!circle.P) firstCircle = circle.N;\n    circles.remove(circle);\n    circlePool.push(circle);\n    RedBlackNode(circle);\n    arc.circle = null;\n  }\n}\n\nvar beachPool = [];\n\nfunction Beach() {\n  RedBlackNode(this);\n  this.edge =\n  this.site =\n  this.circle = null;\n}\n\nfunction createBeach(site) {\n  var beach = beachPool.pop() || new Beach;\n  beach.site = site;\n  return beach;\n}\n\nfunction detachBeach(beach) {\n  detachCircle(beach);\n  beaches.remove(beach);\n  beachPool.push(beach);\n  RedBlackNode(beach);\n}\n\nfunction removeBeach(beach) {\n  var circle = beach.circle,\n      x = circle.x,\n      y = circle.cy,\n      vertex = [x, y],\n      previous = beach.P,\n      next = beach.N,\n      disappearing = [beach];\n\n  detachBeach(beach);\n\n  var lArc = previous;\n  while (lArc.circle\n      && Math.abs(x - lArc.circle.x) < epsilon$3\n      && Math.abs(y - lArc.circle.cy) < epsilon$3) {\n    previous = lArc.P;\n    disappearing.unshift(lArc);\n    detachBeach(lArc);\n    lArc = previous;\n  }\n\n  disappearing.unshift(lArc);\n  detachCircle(lArc);\n\n  var rArc = next;\n  while (rArc.circle\n      && Math.abs(x - rArc.circle.x) < epsilon$3\n      && Math.abs(y - rArc.circle.cy) < epsilon$3) {\n    next = rArc.N;\n    disappearing.push(rArc);\n    detachBeach(rArc);\n    rArc = next;\n  }\n\n  disappearing.push(rArc);\n  detachCircle(rArc);\n\n  var nArcs = disappearing.length,\n      iArc;\n  for (iArc = 1; iArc < nArcs; ++iArc) {\n    rArc = disappearing[iArc];\n    lArc = disappearing[iArc - 1];\n    setEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex);\n  }\n\n  lArc = disappearing[0];\n  rArc = disappearing[nArcs - 1];\n  rArc.edge = createEdge(lArc.site, rArc.site, null, vertex);\n\n  attachCircle(lArc);\n  attachCircle(rArc);\n}\n\nfunction addBeach(site) {\n  var x = site[0],\n      directrix = site[1],\n      lArc,\n      rArc,\n      dxl,\n      dxr,\n      node = beaches._;\n\n  while (node) {\n    dxl = leftBreakPoint(node, directrix) - x;\n    if (dxl > epsilon$3) node = node.L; else {\n      dxr = x - rightBreakPoint(node, directrix);\n      if (dxr > epsilon$3) {\n        if (!node.R) {\n          lArc = node;\n          break;\n        }\n        node = node.R;\n      } else {\n        if (dxl > -epsilon$3) {\n          lArc = node.P;\n          rArc = node;\n        } else if (dxr > -epsilon$3) {\n          lArc = node;\n          rArc = node.N;\n        } else {\n          lArc = rArc = node;\n        }\n        break;\n      }\n    }\n  }\n\n  createCell(site);\n  var newArc = createBeach(site);\n  beaches.insert(lArc, newArc);\n\n  if (!lArc && !rArc) return;\n\n  if (lArc === rArc) {\n    detachCircle(lArc);\n    rArc = createBeach(lArc.site);\n    beaches.insert(newArc, rArc);\n    newArc.edge = rArc.edge = createEdge(lArc.site, newArc.site);\n    attachCircle(lArc);\n    attachCircle(rArc);\n    return;\n  }\n\n  if (!rArc) { // && lArc\n    newArc.edge = createEdge(lArc.site, newArc.site);\n    return;\n  }\n\n  // else lArc !== rArc\n  detachCircle(lArc);\n  detachCircle(rArc);\n\n  var lSite = lArc.site,\n      ax = lSite[0],\n      ay = lSite[1],\n      bx = site[0] - ax,\n      by = site[1] - ay,\n      rSite = rArc.site,\n      cx = rSite[0] - ax,\n      cy = rSite[1] - ay,\n      d = 2 * (bx * cy - by * cx),\n      hb = bx * bx + by * by,\n      hc = cx * cx + cy * cy,\n      vertex = [(cy * hb - by * hc) / d + ax, (bx * hc - cx * hb) / d + ay];\n\n  setEdgeEnd(rArc.edge, lSite, rSite, vertex);\n  newArc.edge = createEdge(lSite, site, null, vertex);\n  rArc.edge = createEdge(site, rSite, null, vertex);\n  attachCircle(lArc);\n  attachCircle(rArc);\n}\n\nfunction leftBreakPoint(arc, directrix) {\n  var site = arc.site,\n      rfocx = site[0],\n      rfocy = site[1],\n      pby2 = rfocy - directrix;\n\n  if (!pby2) return rfocx;\n\n  var lArc = arc.P;\n  if (!lArc) return -Infinity;\n\n  site = lArc.site;\n  var lfocx = site[0],\n      lfocy = site[1],\n      plby2 = lfocy - directrix;\n\n  if (!plby2) return lfocx;\n\n  var hl = lfocx - rfocx,\n      aby2 = 1 / pby2 - 1 / plby2,\n      b = hl / plby2;\n\n  if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx;\n\n  return (rfocx + lfocx) / 2;\n}\n\nfunction rightBreakPoint(arc, directrix) {\n  var rArc = arc.N;\n  if (rArc) return leftBreakPoint(rArc, directrix);\n  var site = arc.site;\n  return site[1] === directrix ? site[0] : Infinity;\n}\n\nvar epsilon$3 = 1e-6;\nvar epsilon2$1 = 1e-12;\nvar beaches;\nvar cells;\nvar circles;\nvar edges;\n\nfunction triangleArea(a, b, c) {\n  return (a[0] - c[0]) * (b[1] - a[1]) - (a[0] - b[0]) * (c[1] - a[1]);\n}\n\nfunction lexicographic(a, b) {\n  return b[1] - a[1]\n      || b[0] - a[0];\n}\n\nfunction Diagram(sites, extent) {\n  var site = sites.sort(lexicographic).pop(),\n      x,\n      y,\n      circle;\n\n  edges = [];\n  cells = new Array(sites.length);\n  beaches = new RedBlackTree;\n  circles = new RedBlackTree;\n\n  while (true) {\n    circle = firstCircle;\n    if (site && (!circle || site[1] < circle.y || (site[1] === circle.y && site[0] < circle.x))) {\n      if (site[0] !== x || site[1] !== y) {\n        addBeach(site);\n        x = site[0], y = site[1];\n      }\n      site = sites.pop();\n    } else if (circle) {\n      removeBeach(circle.arc);\n    } else {\n      break;\n    }\n  }\n\n  sortCellHalfedges();\n\n  if (extent) {\n    var x0 = +extent[0][0],\n        y0 = +extent[0][1],\n        x1 = +extent[1][0],\n        y1 = +extent[1][1];\n    clipEdges(x0, y0, x1, y1);\n    clipCells(x0, y0, x1, y1);\n  }\n\n  this.edges = edges;\n  this.cells = cells;\n\n  beaches =\n  circles =\n  edges =\n  cells = null;\n}\n\nDiagram.prototype = {\n  constructor: Diagram,\n\n  polygons: function() {\n    var edges = this.edges;\n\n    return this.cells.map(function(cell) {\n      var polygon = cell.halfedges.map(function(i) { return cellHalfedgeStart(cell, edges[i]); });\n      polygon.data = cell.site.data;\n      return polygon;\n    });\n  },\n\n  triangles: function() {\n    var triangles = [],\n        edges = this.edges;\n\n    this.cells.forEach(function(cell, i) {\n      var site = cell.site,\n          halfedges = cell.halfedges,\n          j = -1,\n          m = halfedges.length,\n          s0,\n          e1 = edges[halfedges[m - 1]],\n          s1 = e1.left === site ? e1.right : e1.left;\n\n      while (++j < m) {\n        s0 = s1;\n        e1 = edges[halfedges[j]];\n        s1 = e1.left === site ? e1.right : e1.left;\n        if (s0 && s1 && i < s0.index && i < s1.index && triangleArea(site, s0, s1) < 0) {\n          triangles.push([site.data, s0.data, s1.data]);\n        }\n      }\n    });\n\n    return triangles;\n  },\n\n  links: function() {\n    return this.edges.filter(function(edge) {\n      return edge.right;\n    }).map(function(edge) {\n      return {\n        source: edge.left.data,\n        target: edge.right.data\n      };\n    });\n  },\n\n  find: function(x, y, radius) {\n    var that = this,\n        i0, i1 = that._found || 0,\n        cell = that.cells[i1] || that.cells[i1 = 0],\n        dx = x - cell.site[0],\n        dy = y - cell.site[1],\n        d2 = dx * dx + dy * dy;\n\n    do {\n      cell = that.cells[i0 = i1], i1 = null;\n      cell.halfedges.forEach(function(e) {\n        var edge = that.edges[e], v = edge.left;\n        if ((v === cell.site || !v) && !(v = edge.right)) return;\n        var vx = x - v[0],\n            vy = y - v[1],\n            v2 = vx * vx + vy * vy;\n        if (v2 < d2) d2 = v2, i1 = v.index;\n      });\n    } while (i1 !== null);\n\n    that._found = i0;\n\n    return radius == null || d2 <= radius * radius ? cell.site : null;\n  }\n};\n\nvar voronoi = function() {\n  var x$$1 = x$4,\n      y$$1 = y$4,\n      extent = null;\n\n  function voronoi(data) {\n    return new Diagram(data.map(function(d, i) {\n      var s = [Math.round(x$$1(d, i, data) / epsilon$3) * epsilon$3, Math.round(y$$1(d, i, data) / epsilon$3) * epsilon$3];\n      s.index = i;\n      s.data = d;\n      return s;\n    }), extent);\n  }\n\n  voronoi.polygons = function(data) {\n    return voronoi(data).polygons();\n  };\n\n  voronoi.links = function(data) {\n    return voronoi(data).links();\n  };\n\n  voronoi.triangles = function(data) {\n    return voronoi(data).triangles();\n  };\n\n  voronoi.x = function(_) {\n    return arguments.length ? (x$$1 = typeof _ === \"function\" ? _ : constant$9(+_), voronoi) : x$$1;\n  };\n\n  voronoi.y = function(_) {\n    return arguments.length ? (y$$1 = typeof _ === \"function\" ? _ : constant$9(+_), voronoi) : y$$1;\n  };\n\n  voronoi.extent = function(_) {\n    return arguments.length ? (extent = _ == null ? null : [[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]], voronoi) : extent && [[extent[0][0], extent[0][1]], [extent[1][0], extent[1][1]]];\n  };\n\n  voronoi.size = function(_) {\n    return arguments.length ? (extent = _ == null ? null : [[0, 0], [+_[0], +_[1]]], voronoi) : extent && [extent[1][0] - extent[0][0], extent[1][1] - extent[0][1]];\n  };\n\n  return voronoi;\n};\n\nvar constant$10 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nfunction ZoomEvent(target, type, transform) {\n  this.target = target;\n  this.type = type;\n  this.transform = transform;\n}\n\nfunction Transform(k, x, y) {\n  this.k = k;\n  this.x = x;\n  this.y = y;\n}\n\nTransform.prototype = {\n  constructor: Transform,\n  scale: function(k) {\n    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);\n  },\n  translate: function(x, y) {\n    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);\n  },\n  apply: function(point) {\n    return [point[0] * this.k + this.x, point[1] * this.k + this.y];\n  },\n  applyX: function(x) {\n    return x * this.k + this.x;\n  },\n  applyY: function(y) {\n    return y * this.k + this.y;\n  },\n  invert: function(location) {\n    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];\n  },\n  invertX: function(x) {\n    return (x - this.x) / this.k;\n  },\n  invertY: function(y) {\n    return (y - this.y) / this.k;\n  },\n  rescaleX: function(x) {\n    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));\n  },\n  rescaleY: function(y) {\n    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));\n  },\n  toString: function() {\n    return \"translate(\" + this.x + \",\" + this.y + \") scale(\" + this.k + \")\";\n  }\n};\n\nvar identity$6 = new Transform(1, 0, 0);\n\ntransform.prototype = Transform.prototype;\n\nfunction transform(node) {\n  return node.__zoom || identity$6;\n}\n\nfunction nopropagation$1() {\n  exports.event.stopImmediatePropagation();\n}\n\nvar noevent$1 = function() {\n  exports.event.preventDefault();\n  exports.event.stopImmediatePropagation();\n};\n\n// Ignore right-click, since that should open the context menu.\nfunction defaultFilter$1() {\n  return !exports.event.button;\n}\n\nfunction defaultExtent() {\n  var e = this, w, h;\n  if (e instanceof SVGElement) {\n    e = e.ownerSVGElement || e;\n    w = e.width.baseVal.value;\n    h = e.height.baseVal.value;\n  } else {\n    w = e.clientWidth;\n    h = e.clientHeight;\n  }\n  return [[0, 0], [w, h]];\n}\n\nfunction defaultTransform() {\n  return this.__zoom || identity$6;\n}\n\nvar zoom = function() {\n  var filter = defaultFilter$1,\n      extent = defaultExtent,\n      k0 = 0,\n      k1 = Infinity,\n      x0 = -k1,\n      x1 = k1,\n      y0 = x0,\n      y1 = x1,\n      duration = 250,\n      interpolate$$1 = interpolateZoom,\n      gestures = [],\n      listeners = dispatch(\"start\", \"zoom\", \"end\"),\n      touchstarting,\n      touchending,\n      touchDelay = 500,\n      wheelDelay = 150;\n\n  function zoom(selection$$1) {\n    selection$$1\n        .on(\"wheel.zoom\", wheeled)\n        .on(\"mousedown.zoom\", mousedowned)\n        .on(\"dblclick.zoom\", dblclicked)\n        .on(\"touchstart.zoom\", touchstarted)\n        .on(\"touchmove.zoom\", touchmoved)\n        .on(\"touchend.zoom touchcancel.zoom\", touchended)\n        .style(\"-webkit-tap-highlight-color\", \"rgba(0,0,0,0)\")\n        .property(\"__zoom\", defaultTransform);\n  }\n\n  zoom.transform = function(collection, transform) {\n    var selection$$1 = collection.selection ? collection.selection() : collection;\n    selection$$1.property(\"__zoom\", defaultTransform);\n    if (collection !== selection$$1) {\n      schedule(collection, transform);\n    } else {\n      selection$$1.interrupt().each(function() {\n        gesture(this, arguments)\n            .start()\n            .zoom(null, typeof transform === \"function\" ? transform.apply(this, arguments) : transform)\n            .end();\n      });\n    }\n  };\n\n  zoom.scaleBy = function(selection$$1, k) {\n    zoom.scaleTo(selection$$1, function() {\n      var k0 = this.__zoom.k,\n          k1 = typeof k === \"function\" ? k.apply(this, arguments) : k;\n      return k0 * k1;\n    });\n  };\n\n  zoom.scaleTo = function(selection$$1, k) {\n    zoom.transform(selection$$1, function() {\n      var e = extent.apply(this, arguments),\n          t0 = this.__zoom,\n          p0 = centroid(e),\n          p1 = t0.invert(p0),\n          k1 = typeof k === \"function\" ? k.apply(this, arguments) : k;\n      return constrain(translate(scale(t0, k1), p0, p1), e);\n    });\n  };\n\n  zoom.translateBy = function(selection$$1, x, y) {\n    zoom.transform(selection$$1, function() {\n      return constrain(this.__zoom.translate(\n        typeof x === \"function\" ? x.apply(this, arguments) : x,\n        typeof y === \"function\" ? y.apply(this, arguments) : y\n      ), extent.apply(this, arguments));\n    });\n  };\n\n  function scale(transform, k) {\n    k = Math.max(k0, Math.min(k1, k));\n    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);\n  }\n\n  function translate(transform, p0, p1) {\n    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;\n    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);\n  }\n\n  function constrain(transform, extent) {\n    var dx0 = transform.invertX(extent[0][0]) - x0,\n        dx1 = transform.invertX(extent[1][0]) - x1,\n        dy0 = transform.invertY(extent[0][1]) - y0,\n        dy1 = transform.invertY(extent[1][1]) - y1;\n    return transform.translate(\n      dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),\n      dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)\n    );\n  }\n\n  function centroid(extent) {\n    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];\n  }\n\n  function schedule(transition$$1, transform, center) {\n    transition$$1\n        .on(\"start.zoom\", function() { gesture(this, arguments).start(); })\n        .on(\"interrupt.zoom end.zoom\", function() { gesture(this, arguments).end(); })\n        .tween(\"zoom\", function() {\n          var that = this,\n              args = arguments,\n              g = gesture(that, args),\n              e = extent.apply(that, args),\n              p = center || centroid(e),\n              w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),\n              a = that.__zoom,\n              b = typeof transform === \"function\" ? transform.apply(that, args) : transform,\n              i = interpolate$$1(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));\n          return function(t) {\n            if (t === 1) t = b; // Avoid rounding error on end.\n            else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }\n            g.zoom(null, t);\n          };\n        });\n  }\n\n  function gesture(that, args) {\n    for (var i = 0, n = gestures.length, g; i < n; ++i) {\n      if ((g = gestures[i]).that === that) {\n        return g;\n      }\n    }\n    return new Gesture(that, args);\n  }\n\n  function Gesture(that, args) {\n    this.that = that;\n    this.args = args;\n    this.index = -1;\n    this.active = 0;\n    this.extent = extent.apply(that, args);\n  }\n\n  Gesture.prototype = {\n    start: function() {\n      if (++this.active === 1) {\n        this.index = gestures.push(this) - 1;\n        this.emit(\"start\");\n      }\n      return this;\n    },\n    zoom: function(key, transform) {\n      if (this.mouse && key !== \"mouse\") this.mouse[1] = transform.invert(this.mouse[0]);\n      if (this.touch0 && key !== \"touch\") this.touch0[1] = transform.invert(this.touch0[0]);\n      if (this.touch1 && key !== \"touch\") this.touch1[1] = transform.invert(this.touch1[0]);\n      this.that.__zoom = transform;\n      this.emit(\"zoom\");\n      return this;\n    },\n    end: function() {\n      if (--this.active === 0) {\n        gestures.splice(this.index, 1);\n        this.index = -1;\n        this.emit(\"end\");\n      }\n      return this;\n    },\n    emit: function(type) {\n      customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);\n    }\n  };\n\n  function wheeled() {\n    if (!filter.apply(this, arguments)) return;\n    var g = gesture(this, arguments),\n        t = this.__zoom,\n        k = Math.max(k0, Math.min(k1, t.k * Math.pow(2, -exports.event.deltaY * (exports.event.deltaMode ? 120 : 1) / 500))),\n        p = mouse(this);\n\n    // If the mouse is in the same location as before, reuse it.\n    // If there were recent wheel events, reset the wheel idle timeout.\n    if (g.wheel) {\n      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {\n        g.mouse[1] = t.invert(g.mouse[0] = p);\n      }\n      clearTimeout(g.wheel);\n    }\n\n    // If this wheel event won’t trigger a transform change, ignore it.\n    else if (t.k === k) return;\n\n    // Otherwise, capture the mouse point and location at the start.\n    else {\n      g.mouse = [p, t.invert(p)];\n      interrupt(this);\n      g.start();\n    }\n\n    noevent$1();\n    g.wheel = setTimeout(wheelidled, wheelDelay);\n    g.zoom(\"mouse\", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent));\n\n    function wheelidled() {\n      g.wheel = null;\n      g.end();\n    }\n  }\n\n  function mousedowned() {\n    if (touchending || !filter.apply(this, arguments)) return;\n    var g = gesture(this, arguments),\n        v = select(exports.event.view).on(\"mousemove.zoom\", mousemoved, true).on(\"mouseup.zoom\", mouseupped, true),\n        p = mouse(this);\n\n    dragDisable(exports.event.view);\n    nopropagation$1();\n    g.mouse = [p, this.__zoom.invert(p)];\n    interrupt(this);\n    g.start();\n\n    function mousemoved() {\n      noevent$1();\n      g.moved = true;\n      g.zoom(\"mouse\", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent));\n    }\n\n    function mouseupped() {\n      v.on(\"mousemove.zoom mouseup.zoom\", null);\n      yesdrag(exports.event.view, g.moved);\n      noevent$1();\n      g.end();\n    }\n  }\n\n  function dblclicked() {\n    if (!filter.apply(this, arguments)) return;\n    var t0 = this.__zoom,\n        p0 = mouse(this),\n        p1 = t0.invert(p0),\n        k1 = t0.k * (exports.event.shiftKey ? 0.5 : 2),\n        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments));\n\n    noevent$1();\n    if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0);\n    else select(this).call(zoom.transform, t1);\n  }\n\n  function touchstarted() {\n    if (!filter.apply(this, arguments)) return;\n    var g = gesture(this, arguments),\n        touches$$1 = exports.event.changedTouches,\n        n = touches$$1.length, i, t, p;\n\n    nopropagation$1();\n    for (i = 0; i < n; ++i) {\n      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);\n      p = [p, this.__zoom.invert(p), t.identifier];\n      if (!g.touch0) g.touch0 = p;\n      else if (!g.touch1) g.touch1 = p;\n    }\n\n    // If this is a dbltap, reroute to the (optional) dblclick.zoom handler.\n    if (touchstarting) {\n      touchstarting = clearTimeout(touchstarting);\n      if (!g.touch1) {\n        g.end();\n        p = select(this).on(\"dblclick.zoom\");\n        if (p) p.apply(this, arguments);\n        return;\n      }\n    }\n\n    if (exports.event.touches.length === n) {\n      touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);\n      interrupt(this);\n      g.start();\n    }\n  }\n\n  function touchmoved() {\n    var g = gesture(this, arguments),\n        touches$$1 = exports.event.changedTouches,\n        n = touches$$1.length, i, t, p, l;\n\n    noevent$1();\n    if (touchstarting) touchstarting = clearTimeout(touchstarting);\n    for (i = 0; i < n; ++i) {\n      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);\n      if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;\n      else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;\n    }\n    t = g.that.__zoom;\n    if (g.touch1) {\n      var p0 = g.touch0[0], l0 = g.touch0[1],\n          p1 = g.touch1[0], l1 = g.touch1[1],\n          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,\n          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;\n      t = scale(t, Math.sqrt(dp / dl));\n      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];\n      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];\n    }\n    else if (g.touch0) p = g.touch0[0], l = g.touch0[1];\n    else return;\n    g.zoom(\"touch\", constrain(translate(t, p, l), g.extent));\n  }\n\n  function touchended() {\n    var g = gesture(this, arguments),\n        touches$$1 = exports.event.changedTouches,\n        n = touches$$1.length, i, t;\n\n    nopropagation$1();\n    if (touchending) clearTimeout(touchending);\n    touchending = setTimeout(function() { touchending = null; }, touchDelay);\n    for (i = 0; i < n; ++i) {\n      t = touches$$1[i];\n      if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;\n      else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;\n    }\n    if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;\n    if (!g.touch0) g.end();\n  }\n\n  zoom.filter = function(_) {\n    return arguments.length ? (filter = typeof _ === \"function\" ? _ : constant$10(!!_), zoom) : filter;\n  };\n\n  zoom.extent = function(_) {\n    return arguments.length ? (extent = typeof _ === \"function\" ? _ : constant$10([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;\n  };\n\n  zoom.scaleExtent = function(_) {\n    return arguments.length ? (k0 = +_[0], k1 = +_[1], zoom) : [k0, k1];\n  };\n\n  zoom.translateExtent = function(_) {\n    return arguments.length ? (x0 = +_[0][0], x1 = +_[1][0], y0 = +_[0][1], y1 = +_[1][1], zoom) : [[x0, y0], [x1, y1]];\n  };\n\n  zoom.duration = function(_) {\n    return arguments.length ? (duration = +_, zoom) : duration;\n  };\n\n  zoom.interpolate = function(_) {\n    return arguments.length ? (interpolate$$1 = _, zoom) : interpolate$$1;\n  };\n\n  zoom.on = function() {\n    var value = listeners.on.apply(listeners, arguments);\n    return value === listeners ? zoom : value;\n  };\n\n  return zoom;\n};\n\nvar constant$11 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar BrushEvent = function(target, type, selection) {\n  this.target = target;\n  this.type = type;\n  this.selection = selection;\n};\n\nfunction nopropagation$2() {\n  exports.event.stopImmediatePropagation();\n}\n\nvar noevent$2 = function() {\n  exports.event.preventDefault();\n  exports.event.stopImmediatePropagation();\n};\n\nvar MODE_DRAG = {name: \"drag\"};\nvar MODE_SPACE = {name: \"space\"};\nvar MODE_HANDLE = {name: \"handle\"};\nvar MODE_CENTER = {name: \"center\"};\n\nvar X = {\n  name: \"x\",\n  handles: [\"e\", \"w\"].map(type$1),\n  input: function(x, e) { return x && [[x[0], e[0][1]], [x[1], e[1][1]]]; },\n  output: function(xy) { return xy && [xy[0][0], xy[1][0]]; }\n};\n\nvar Y = {\n  name: \"y\",\n  handles: [\"n\", \"s\"].map(type$1),\n  input: function(y, e) { return y && [[e[0][0], y[0]], [e[1][0], y[1]]]; },\n  output: function(xy) { return xy && [xy[0][1], xy[1][1]]; }\n};\n\nvar XY = {\n  name: \"xy\",\n  handles: [\"n\", \"e\", \"s\", \"w\", \"nw\", \"ne\", \"se\", \"sw\"].map(type$1),\n  input: function(xy) { return xy; },\n  output: function(xy) { return xy; }\n};\n\nvar cursors = {\n  overlay: \"crosshair\",\n  selection: \"move\",\n  n: \"ns-resize\",\n  e: \"ew-resize\",\n  s: \"ns-resize\",\n  w: \"ew-resize\",\n  nw: \"nwse-resize\",\n  ne: \"nesw-resize\",\n  se: \"nwse-resize\",\n  sw: \"nesw-resize\"\n};\n\nvar flipX = {\n  e: \"w\",\n  w: \"e\",\n  nw: \"ne\",\n  ne: \"nw\",\n  se: \"sw\",\n  sw: \"se\"\n};\n\nvar flipY = {\n  n: \"s\",\n  s: \"n\",\n  nw: \"sw\",\n  ne: \"se\",\n  se: \"ne\",\n  sw: \"nw\"\n};\n\nvar signsX = {\n  overlay: +1,\n  selection: +1,\n  n: null,\n  e: +1,\n  s: null,\n  w: -1,\n  nw: -1,\n  ne: +1,\n  se: +1,\n  sw: -1\n};\n\nvar signsY = {\n  overlay: +1,\n  selection: +1,\n  n: -1,\n  e: null,\n  s: +1,\n  w: null,\n  nw: -1,\n  ne: -1,\n  se: +1,\n  sw: +1\n};\n\nfunction type$1(t) {\n  return {type: t};\n}\n\n// Ignore right-click, since that should open the context menu.\nfunction defaultFilter$2() {\n  return !exports.event.button;\n}\n\nfunction defaultExtent$1() {\n  var svg = this.ownerSVGElement || this;\n  return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]];\n}\n\n// Like d3.local, but with the name “__brush” rather than auto-generated.\nfunction local$1(node) {\n  while (!node.__brush) if (!(node = node.parentNode)) return;\n  return node.__brush;\n}\n\nfunction empty$1(extent) {\n  return extent[0][0] === extent[1][0]\n      || extent[0][1] === extent[1][1];\n}\n\nfunction brushSelection(node) {\n  var state = node.__brush;\n  return state ? state.dim.output(state.selection) : null;\n}\n\nfunction brushX() {\n  return brush$1(X);\n}\n\nfunction brushY() {\n  return brush$1(Y);\n}\n\nvar brush = function() {\n  return brush$1(XY);\n};\n\nfunction brush$1(dim) {\n  var extent = defaultExtent$1,\n      filter = defaultFilter$2,\n      listeners = dispatch(brush, \"start\", \"brush\", \"end\"),\n      handleSize = 6,\n      touchending;\n\n  function brush(group) {\n    var overlay = group\n        .property(\"__brush\", initialize)\n      .selectAll(\".overlay\")\n      .data([type$1(\"overlay\")]);\n\n    overlay.enter().append(\"rect\")\n        .attr(\"class\", \"overlay\")\n        .attr(\"pointer-events\", \"all\")\n        .attr(\"cursor\", cursors.overlay)\n      .merge(overlay)\n        .each(function() {\n          var extent = local$1(this).extent;\n          select(this)\n              .attr(\"x\", extent[0][0])\n              .attr(\"y\", extent[0][1])\n              .attr(\"width\", extent[1][0] - extent[0][0])\n              .attr(\"height\", extent[1][1] - extent[0][1]);\n        });\n\n    group.selectAll(\".selection\")\n      .data([type$1(\"selection\")])\n      .enter().append(\"rect\")\n        .attr(\"class\", \"selection\")\n        .attr(\"cursor\", cursors.selection)\n        .attr(\"fill\", \"#777\")\n        .attr(\"fill-opacity\", 0.3)\n        .attr(\"stroke\", \"#fff\")\n        .attr(\"shape-rendering\", \"crispEdges\");\n\n    var handle = group.selectAll(\".handle\")\n      .data(dim.handles, function(d) { return d.type; });\n\n    handle.exit().remove();\n\n    handle.enter().append(\"rect\")\n        .attr(\"class\", function(d) { return \"handle handle--\" + d.type; })\n        .attr(\"cursor\", function(d) { return cursors[d.type]; });\n\n    group\n        .each(redraw)\n        .attr(\"fill\", \"none\")\n        .attr(\"pointer-events\", \"all\")\n        .style(\"-webkit-tap-highlight-color\", \"rgba(0,0,0,0)\")\n        .on(\"mousedown.brush touchstart.brush\", started);\n  }\n\n  brush.move = function(group, selection$$1) {\n    if (group.selection) {\n      group\n          .on(\"start.brush\", function() { emitter(this, arguments).beforestart().start(); })\n          .on(\"interrupt.brush end.brush\", function() { emitter(this, arguments).end(); })\n          .tween(\"brush\", function() {\n            var that = this,\n                state = that.__brush,\n                emit = emitter(that, arguments),\n                selection0 = state.selection,\n                selection1 = dim.input(typeof selection$$1 === \"function\" ? selection$$1.apply(this, arguments) : selection$$1, state.extent),\n                i = interpolate(selection0, selection1);\n\n            function tween(t) {\n              state.selection = t === 1 && empty$1(selection1) ? null : i(t);\n              redraw.call(that);\n              emit.brush();\n            }\n\n            return selection0 && selection1 ? tween : tween(1);\n          });\n    } else {\n      group\n          .each(function() {\n            var that = this,\n                args = arguments,\n                state = that.__brush,\n                selection1 = dim.input(typeof selection$$1 === \"function\" ? selection$$1.apply(that, args) : selection$$1, state.extent),\n                emit = emitter(that, args).beforestart();\n\n            interrupt(that);\n            state.selection = selection1 == null || empty$1(selection1) ? null : selection1;\n            redraw.call(that);\n            emit.start().brush().end();\n          });\n    }\n  };\n\n  function redraw() {\n    var group = select(this),\n        selection$$1 = local$1(this).selection;\n\n    if (selection$$1) {\n      group.selectAll(\".selection\")\n          .style(\"display\", null)\n          .attr(\"x\", selection$$1[0][0])\n          .attr(\"y\", selection$$1[0][1])\n          .attr(\"width\", selection$$1[1][0] - selection$$1[0][0])\n          .attr(\"height\", selection$$1[1][1] - selection$$1[0][1]);\n\n      group.selectAll(\".handle\")\n          .style(\"display\", null)\n          .attr(\"x\", function(d) { return d.type[d.type.length - 1] === \"e\" ? selection$$1[1][0] - handleSize / 2 : selection$$1[0][0] - handleSize / 2; })\n          .attr(\"y\", function(d) { return d.type[0] === \"s\" ? selection$$1[1][1] - handleSize / 2 : selection$$1[0][1] - handleSize / 2; })\n          .attr(\"width\", function(d) { return d.type === \"n\" || d.type === \"s\" ? selection$$1[1][0] - selection$$1[0][0] + handleSize : handleSize; })\n          .attr(\"height\", function(d) { return d.type === \"e\" || d.type === \"w\" ? selection$$1[1][1] - selection$$1[0][1] + handleSize : handleSize; });\n    }\n\n    else {\n      group.selectAll(\".selection,.handle\")\n          .style(\"display\", \"none\")\n          .attr(\"x\", null)\n          .attr(\"y\", null)\n          .attr(\"width\", null)\n          .attr(\"height\", null);\n    }\n  }\n\n  function emitter(that, args) {\n    return that.__brush.emitter || new Emitter(that, args);\n  }\n\n  function Emitter(that, args) {\n    this.that = that;\n    this.args = args;\n    this.state = that.__brush;\n    this.active = 0;\n  }\n\n  Emitter.prototype = {\n    beforestart: function() {\n      if (++this.active === 1) this.state.emitter = this, this.starting = true;\n      return this;\n    },\n    start: function() {\n      if (this.starting) this.starting = false, this.emit(\"start\");\n      return this;\n    },\n    brush: function() {\n      this.emit(\"brush\");\n      return this;\n    },\n    end: function() {\n      if (--this.active === 0) delete this.state.emitter, this.emit(\"end\");\n      return this;\n    },\n    emit: function(type) {\n      customEvent(new BrushEvent(brush, type, dim.output(this.state.selection)), listeners.apply, listeners, [type, this.that, this.args]);\n    }\n  };\n\n  function started() {\n    if (exports.event.touches) { if (exports.event.changedTouches.length < exports.event.touches.length) return noevent$2(); }\n    else if (touchending) return;\n    if (!filter.apply(this, arguments)) return;\n\n    var that = this,\n        type = exports.event.target.__data__.type,\n        mode = (exports.event.metaKey ? type = \"overlay\" : type) === \"selection\" ? MODE_DRAG : (exports.event.altKey ? MODE_CENTER : MODE_HANDLE),\n        signX = dim === Y ? null : signsX[type],\n        signY = dim === X ? null : signsY[type],\n        state = local$1(that),\n        extent = state.extent,\n        selection$$1 = state.selection,\n        W = extent[0][0], w0, w1,\n        N = extent[0][1], n0, n1,\n        E = extent[1][0], e0, e1,\n        S = extent[1][1], s0, s1,\n        dx,\n        dy,\n        moving,\n        shifting = signX && signY && exports.event.shiftKey,\n        lockX,\n        lockY,\n        point0 = mouse(that),\n        point = point0,\n        emit = emitter(that, arguments).beforestart();\n\n    if (type === \"overlay\") {\n      state.selection = selection$$1 = [\n        [w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]],\n        [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0]\n      ];\n    } else {\n      w0 = selection$$1[0][0];\n      n0 = selection$$1[0][1];\n      e0 = selection$$1[1][0];\n      s0 = selection$$1[1][1];\n    }\n\n    w1 = w0;\n    n1 = n0;\n    e1 = e0;\n    s1 = s0;\n\n    var group = select(that)\n        .attr(\"pointer-events\", \"none\");\n\n    var overlay = group.selectAll(\".overlay\")\n        .attr(\"cursor\", cursors[type]);\n\n    if (exports.event.touches) {\n      group\n          .on(\"touchmove.brush\", moved, true)\n          .on(\"touchend.brush touchcancel.brush\", ended, true);\n    } else {\n      var view = select(exports.event.view)\n          .on(\"keydown.brush\", keydowned, true)\n          .on(\"keyup.brush\", keyupped, true)\n          .on(\"mousemove.brush\", moved, true)\n          .on(\"mouseup.brush\", ended, true);\n\n      dragDisable(exports.event.view);\n    }\n\n    nopropagation$2();\n    interrupt(that);\n    redraw.call(that);\n    emit.start();\n\n    function moved() {\n      var point1 = mouse(that);\n      if (shifting && !lockX && !lockY) {\n        if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true;\n        else lockX = true;\n      }\n      point = point1;\n      moving = true;\n      noevent$2();\n      move();\n    }\n\n    function move() {\n      var t;\n\n      dx = point[0] - point0[0];\n      dy = point[1] - point0[1];\n\n      switch (mode) {\n        case MODE_SPACE:\n        case MODE_DRAG: {\n          if (signX) dx = Math.max(W - w0, Math.min(E - e0, dx)), w1 = w0 + dx, e1 = e0 + dx;\n          if (signY) dy = Math.max(N - n0, Math.min(S - s0, dy)), n1 = n0 + dy, s1 = s0 + dy;\n          break;\n        }\n        case MODE_HANDLE: {\n          if (signX < 0) dx = Math.max(W - w0, Math.min(E - w0, dx)), w1 = w0 + dx, e1 = e0;\n          else if (signX > 0) dx = Math.max(W - e0, Math.min(E - e0, dx)), w1 = w0, e1 = e0 + dx;\n          if (signY < 0) dy = Math.max(N - n0, Math.min(S - n0, dy)), n1 = n0 + dy, s1 = s0;\n          else if (signY > 0) dy = Math.max(N - s0, Math.min(S - s0, dy)), n1 = n0, s1 = s0 + dy;\n          break;\n        }\n        case MODE_CENTER: {\n          if (signX) w1 = Math.max(W, Math.min(E, w0 - dx * signX)), e1 = Math.max(W, Math.min(E, e0 + dx * signX));\n          if (signY) n1 = Math.max(N, Math.min(S, n0 - dy * signY)), s1 = Math.max(N, Math.min(S, s0 + dy * signY));\n          break;\n        }\n      }\n\n      if (e1 < w1) {\n        signX *= -1;\n        t = w0, w0 = e0, e0 = t;\n        t = w1, w1 = e1, e1 = t;\n        if (type in flipX) overlay.attr(\"cursor\", cursors[type = flipX[type]]);\n      }\n\n      if (s1 < n1) {\n        signY *= -1;\n        t = n0, n0 = s0, s0 = t;\n        t = n1, n1 = s1, s1 = t;\n        if (type in flipY) overlay.attr(\"cursor\", cursors[type = flipY[type]]);\n      }\n\n      if (state.selection) selection$$1 = state.selection; // May be set by brush.move!\n      if (lockX) w1 = selection$$1[0][0], e1 = selection$$1[1][0];\n      if (lockY) n1 = selection$$1[0][1], s1 = selection$$1[1][1];\n\n      if (selection$$1[0][0] !== w1\n          || selection$$1[0][1] !== n1\n          || selection$$1[1][0] !== e1\n          || selection$$1[1][1] !== s1) {\n        state.selection = [[w1, n1], [e1, s1]];\n        redraw.call(that);\n        emit.brush();\n      }\n    }\n\n    function ended() {\n      nopropagation$2();\n      if (exports.event.touches) {\n        if (exports.event.touches.length) return;\n        if (touchending) clearTimeout(touchending);\n        touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!\n        group.on(\"touchmove.brush touchend.brush touchcancel.brush\", null);\n      } else {\n        yesdrag(exports.event.view, moving);\n        view.on(\"keydown.brush keyup.brush mousemove.brush mouseup.brush\", null);\n      }\n      group.attr(\"pointer-events\", \"all\");\n      overlay.attr(\"cursor\", cursors.overlay);\n      if (state.selection) selection$$1 = state.selection; // May be set by brush.move (on start)!\n      if (empty$1(selection$$1)) state.selection = null, redraw.call(that);\n      emit.end();\n    }\n\n    function keydowned() {\n      switch (exports.event.keyCode) {\n        case 16: { // SHIFT\n          shifting = signX && signY;\n          break;\n        }\n        case 18: { // ALT\n          if (mode === MODE_HANDLE) {\n            if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;\n            if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;\n            mode = MODE_CENTER;\n            move();\n          }\n          break;\n        }\n        case 32: { // SPACE; takes priority over ALT\n          if (mode === MODE_HANDLE || mode === MODE_CENTER) {\n            if (signX < 0) e0 = e1 - dx; else if (signX > 0) w0 = w1 - dx;\n            if (signY < 0) s0 = s1 - dy; else if (signY > 0) n0 = n1 - dy;\n            mode = MODE_SPACE;\n            overlay.attr(\"cursor\", cursors.selection);\n            move();\n          }\n          break;\n        }\n        default: return;\n      }\n      noevent$2();\n    }\n\n    function keyupped() {\n      switch (exports.event.keyCode) {\n        case 16: { // SHIFT\n          if (shifting) {\n            lockX = lockY = shifting = false;\n            move();\n          }\n          break;\n        }\n        case 18: { // ALT\n          if (mode === MODE_CENTER) {\n            if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;\n            if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;\n            mode = MODE_HANDLE;\n            move();\n          }\n          break;\n        }\n        case 32: { // SPACE\n          if (mode === MODE_SPACE) {\n            if (exports.event.altKey) {\n              if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;\n              if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;\n              mode = MODE_CENTER;\n            } else {\n              if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;\n              if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;\n              mode = MODE_HANDLE;\n            }\n            overlay.attr(\"cursor\", cursors[type]);\n            move();\n          }\n          break;\n        }\n        default: return;\n      }\n      noevent$2();\n    }\n  }\n\n  function initialize() {\n    var state = this.__brush || {selection: null};\n    state.extent = extent.apply(this, arguments);\n    state.dim = dim;\n    return state;\n  }\n\n  brush.extent = function(_) {\n    return arguments.length ? (extent = typeof _ === \"function\" ? _ : constant$11([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), brush) : extent;\n  };\n\n  brush.filter = function(_) {\n    return arguments.length ? (filter = typeof _ === \"function\" ? _ : constant$11(!!_), brush) : filter;\n  };\n\n  brush.handleSize = function(_) {\n    return arguments.length ? (handleSize = +_, brush) : handleSize;\n  };\n\n  brush.on = function() {\n    var value = listeners.on.apply(listeners, arguments);\n    return value === listeners ? brush : value;\n  };\n\n  return brush;\n}\n\nvar cos = Math.cos;\nvar sin = Math.sin;\nvar pi$3 = Math.PI;\nvar halfPi$2 = pi$3 / 2;\nvar tau$3 = pi$3 * 2;\nvar max$1 = Math.max;\n\nfunction compareValue(compare) {\n  return function(a, b) {\n    return compare(\n      a.source.value + a.target.value,\n      b.source.value + b.target.value\n    );\n  };\n}\n\nvar chord = function() {\n  var padAngle = 0,\n      sortGroups = null,\n      sortSubgroups = null,\n      sortChords = null;\n\n  function chord(matrix) {\n    var n = matrix.length,\n        groupSums = [],\n        groupIndex = range(n),\n        subgroupIndex = [],\n        chords = [],\n        groups = chords.groups = new Array(n),\n        subgroups = new Array(n * n),\n        k,\n        x,\n        x0,\n        dx,\n        i,\n        j;\n\n    // Compute the sum.\n    k = 0, i = -1; while (++i < n) {\n      x = 0, j = -1; while (++j < n) {\n        x += matrix[i][j];\n      }\n      groupSums.push(x);\n      subgroupIndex.push(range(n));\n      k += x;\n    }\n\n    // Sort groups…\n    if (sortGroups) groupIndex.sort(function(a, b) {\n      return sortGroups(groupSums[a], groupSums[b]);\n    });\n\n    // Sort subgroups…\n    if (sortSubgroups) subgroupIndex.forEach(function(d, i) {\n      d.sort(function(a, b) {\n        return sortSubgroups(matrix[i][a], matrix[i][b]);\n      });\n    });\n\n    // Convert the sum to scaling factor for [0, 2pi].\n    // TODO Allow start and end angle to be specified?\n    // TODO Allow padding to be specified as percentage?\n    k = max$1(0, tau$3 - padAngle * n) / k;\n    dx = k ? padAngle : tau$3 / n;\n\n    // Compute the start and end angle for each group and subgroup.\n    // Note: Opera has a bug reordering object literal properties!\n    x = 0, i = -1; while (++i < n) {\n      x0 = x, j = -1; while (++j < n) {\n        var di = groupIndex[i],\n            dj = subgroupIndex[di][j],\n            v = matrix[di][dj],\n            a0 = x,\n            a1 = x += v * k;\n        subgroups[dj * n + di] = {\n          index: di,\n          subindex: dj,\n          startAngle: a0,\n          endAngle: a1,\n          value: v\n        };\n      }\n      groups[di] = {\n        index: di,\n        startAngle: x0,\n        endAngle: x,\n        value: groupSums[di]\n      };\n      x += dx;\n    }\n\n    // Generate chords for each (non-empty) subgroup-subgroup link.\n    i = -1; while (++i < n) {\n      j = i - 1; while (++j < n) {\n        var source = subgroups[j * n + i],\n            target = subgroups[i * n + j];\n        if (source.value || target.value) {\n          chords.push(source.value < target.value\n              ? {source: target, target: source}\n              : {source: source, target: target});\n        }\n      }\n    }\n\n    return sortChords ? chords.sort(sortChords) : chords;\n  }\n\n  chord.padAngle = function(_) {\n    return arguments.length ? (padAngle = max$1(0, _), chord) : padAngle;\n  };\n\n  chord.sortGroups = function(_) {\n    return arguments.length ? (sortGroups = _, chord) : sortGroups;\n  };\n\n  chord.sortSubgroups = function(_) {\n    return arguments.length ? (sortSubgroups = _, chord) : sortSubgroups;\n  };\n\n  chord.sortChords = function(_) {\n    return arguments.length ? (_ == null ? sortChords = null : (sortChords = compareValue(_))._ = _, chord) : sortChords && sortChords._;\n  };\n\n  return chord;\n};\n\nvar slice$5 = Array.prototype.slice;\n\nvar constant$12 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nfunction defaultSource(d) {\n  return d.source;\n}\n\nfunction defaultTarget(d) {\n  return d.target;\n}\n\nfunction defaultRadius$1(d) {\n  return d.radius;\n}\n\nfunction defaultStartAngle(d) {\n  return d.startAngle;\n}\n\nfunction defaultEndAngle(d) {\n  return d.endAngle;\n}\n\nvar ribbon = function() {\n  var source = defaultSource,\n      target = defaultTarget,\n      radius = defaultRadius$1,\n      startAngle = defaultStartAngle,\n      endAngle = defaultEndAngle,\n      context = null;\n\n  function ribbon() {\n    var buffer,\n        argv = slice$5.call(arguments),\n        s = source.apply(this, argv),\n        t = target.apply(this, argv),\n        sr = +radius.apply(this, (argv[0] = s, argv)),\n        sa0 = startAngle.apply(this, argv) - halfPi$2,\n        sa1 = endAngle.apply(this, argv) - halfPi$2,\n        sx0 = sr * cos(sa0),\n        sy0 = sr * sin(sa0),\n        tr = +radius.apply(this, (argv[0] = t, argv)),\n        ta0 = startAngle.apply(this, argv) - halfPi$2,\n        ta1 = endAngle.apply(this, argv) - halfPi$2;\n\n    if (!context) context = buffer = path();\n\n    context.moveTo(sx0, sy0);\n    context.arc(0, 0, sr, sa0, sa1);\n    if (sa0 !== ta0 || sa1 !== ta1) { // TODO sr !== tr?\n      context.quadraticCurveTo(0, 0, tr * cos(ta0), tr * sin(ta0));\n      context.arc(0, 0, tr, ta0, ta1);\n    }\n    context.quadraticCurveTo(0, 0, sx0, sy0);\n    context.closePath();\n\n    if (buffer) return context = null, buffer + \"\" || null;\n  }\n\n  ribbon.radius = function(_) {\n    return arguments.length ? (radius = typeof _ === \"function\" ? _ : constant$12(+_), ribbon) : radius;\n  };\n\n  ribbon.startAngle = function(_) {\n    return arguments.length ? (startAngle = typeof _ === \"function\" ? _ : constant$12(+_), ribbon) : startAngle;\n  };\n\n  ribbon.endAngle = function(_) {\n    return arguments.length ? (endAngle = typeof _ === \"function\" ? _ : constant$12(+_), ribbon) : endAngle;\n  };\n\n  ribbon.source = function(_) {\n    return arguments.length ? (source = _, ribbon) : source;\n  };\n\n  ribbon.target = function(_) {\n    return arguments.length ? (target = _, ribbon) : target;\n  };\n\n  ribbon.context = function(_) {\n    return arguments.length ? ((context = _ == null ? null : _), ribbon) : context;\n  };\n\n  return ribbon;\n};\n\n// Adds floating point numbers with twice the normal precision.\n// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and\n// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)\n// 305–363 (1997).\n// Code adapted from GeographicLib by Charles F. F. Karney,\n// http://geographiclib.sourceforge.net/\n\nvar adder = function() {\n  return new Adder;\n};\n\nfunction Adder() {\n  this.reset();\n}\n\nAdder.prototype = {\n  constructor: Adder,\n  reset: function() {\n    this.s = // rounded value\n    this.t = 0; // exact error\n  },\n  add: function(y) {\n    add$1(temp, y, this.t);\n    add$1(this, temp.s, this.s);\n    if (this.s) this.t += temp.t;\n    else this.s = temp.t;\n  },\n  valueOf: function() {\n    return this.s;\n  }\n};\n\nvar temp = new Adder;\n\nfunction add$1(adder, a, b) {\n  var x = adder.s = a + b,\n      bv = x - a,\n      av = x - bv;\n  adder.t = (a - av) + (b - bv);\n}\n\nvar epsilon$4 = 1e-6;\nvar epsilon2$2 = 1e-12;\nvar pi$4 = Math.PI;\nvar halfPi$3 = pi$4 / 2;\nvar quarterPi = pi$4 / 4;\nvar tau$4 = pi$4 * 2;\n\nvar degrees$1 = 180 / pi$4;\nvar radians = pi$4 / 180;\n\nvar abs = Math.abs;\nvar atan = Math.atan;\nvar atan2 = Math.atan2;\nvar cos$1 = Math.cos;\nvar ceil = Math.ceil;\nvar exp = Math.exp;\n\nvar log$1 = Math.log;\nvar pow$1 = Math.pow;\nvar sin$1 = Math.sin;\nvar sign$1 = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };\nvar sqrt$1 = Math.sqrt;\nvar tan = Math.tan;\n\nfunction acos(x) {\n  return x > 1 ? 0 : x < -1 ? pi$4 : Math.acos(x);\n}\n\nfunction asin$1(x) {\n  return x > 1 ? halfPi$3 : x < -1 ? -halfPi$3 : Math.asin(x);\n}\n\nfunction haversin(x) {\n  return (x = sin$1(x / 2)) * x;\n}\n\nfunction noop$2() {}\n\nfunction streamGeometry(geometry, stream) {\n  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {\n    streamGeometryType[geometry.type](geometry, stream);\n  }\n}\n\nvar streamObjectType = {\n  Feature: function(feature, stream) {\n    streamGeometry(feature.geometry, stream);\n  },\n  FeatureCollection: function(object, stream) {\n    var features = object.features, i = -1, n = features.length;\n    while (++i < n) streamGeometry(features[i].geometry, stream);\n  }\n};\n\nvar streamGeometryType = {\n  Sphere: function(object, stream) {\n    stream.sphere();\n  },\n  Point: function(object, stream) {\n    object = object.coordinates;\n    stream.point(object[0], object[1], object[2]);\n  },\n  MultiPoint: function(object, stream) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);\n  },\n  LineString: function(object, stream) {\n    streamLine(object.coordinates, stream, 0);\n  },\n  MultiLineString: function(object, stream) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) streamLine(coordinates[i], stream, 0);\n  },\n  Polygon: function(object, stream) {\n    streamPolygon(object.coordinates, stream);\n  },\n  MultiPolygon: function(object, stream) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) streamPolygon(coordinates[i], stream);\n  },\n  GeometryCollection: function(object, stream) {\n    var geometries = object.geometries, i = -1, n = geometries.length;\n    while (++i < n) streamGeometry(geometries[i], stream);\n  }\n};\n\nfunction streamLine(coordinates, stream, closed) {\n  var i = -1, n = coordinates.length - closed, coordinate;\n  stream.lineStart();\n  while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);\n  stream.lineEnd();\n}\n\nfunction streamPolygon(coordinates, stream) {\n  var i = -1, n = coordinates.length;\n  stream.polygonStart();\n  while (++i < n) streamLine(coordinates[i], stream, 1);\n  stream.polygonEnd();\n}\n\nvar geoStream = function(object, stream) {\n  if (object && streamObjectType.hasOwnProperty(object.type)) {\n    streamObjectType[object.type](object, stream);\n  } else {\n    streamGeometry(object, stream);\n  }\n};\n\nvar areaRingSum = adder();\n\nvar areaSum = adder();\nvar lambda00;\nvar phi00;\nvar lambda0;\nvar cosPhi0;\nvar sinPhi0;\n\nvar areaStream = {\n  point: noop$2,\n  lineStart: noop$2,\n  lineEnd: noop$2,\n  polygonStart: function() {\n    areaRingSum.reset();\n    areaStream.lineStart = areaRingStart;\n    areaStream.lineEnd = areaRingEnd;\n  },\n  polygonEnd: function() {\n    var areaRing = +areaRingSum;\n    areaSum.add(areaRing < 0 ? tau$4 + areaRing : areaRing);\n    this.lineStart = this.lineEnd = this.point = noop$2;\n  },\n  sphere: function() {\n    areaSum.add(tau$4);\n  }\n};\n\nfunction areaRingStart() {\n  areaStream.point = areaPointFirst;\n}\n\nfunction areaRingEnd() {\n  areaPoint(lambda00, phi00);\n}\n\nfunction areaPointFirst(lambda, phi) {\n  areaStream.point = areaPoint;\n  lambda00 = lambda, phi00 = phi;\n  lambda *= radians, phi *= radians;\n  lambda0 = lambda, cosPhi0 = cos$1(phi = phi / 2 + quarterPi), sinPhi0 = sin$1(phi);\n}\n\nfunction areaPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  phi = phi / 2 + quarterPi; // half the angular distance from south pole\n\n  // Spherical excess E for a spherical triangle with vertices: south pole,\n  // previous point, current point.  Uses a formula derived from Cagnoli’s\n  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).\n  var dLambda = lambda - lambda0,\n      sdLambda = dLambda >= 0 ? 1 : -1,\n      adLambda = sdLambda * dLambda,\n      cosPhi = cos$1(phi),\n      sinPhi = sin$1(phi),\n      k = sinPhi0 * sinPhi,\n      u = cosPhi0 * cosPhi + k * cos$1(adLambda),\n      v = k * sdLambda * sin$1(adLambda);\n  areaRingSum.add(atan2(v, u));\n\n  // Advance the previous points.\n  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;\n}\n\nvar area$2 = function(object) {\n  areaSum.reset();\n  geoStream(object, areaStream);\n  return areaSum * 2;\n};\n\nfunction spherical(cartesian) {\n  return [atan2(cartesian[1], cartesian[0]), asin$1(cartesian[2])];\n}\n\nfunction cartesian(spherical) {\n  var lambda = spherical[0], phi = spherical[1], cosPhi = cos$1(phi);\n  return [cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)];\n}\n\nfunction cartesianDot(a, b) {\n  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];\n}\n\nfunction cartesianCross(a, b) {\n  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];\n}\n\n// TODO return a\nfunction cartesianAddInPlace(a, b) {\n  a[0] += b[0], a[1] += b[1], a[2] += b[2];\n}\n\nfunction cartesianScale(vector, k) {\n  return [vector[0] * k, vector[1] * k, vector[2] * k];\n}\n\n// TODO return d\nfunction cartesianNormalizeInPlace(d) {\n  var l = sqrt$1(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);\n  d[0] /= l, d[1] /= l, d[2] /= l;\n}\n\nvar lambda0$1;\nvar phi0;\nvar lambda1;\nvar phi1;\nvar lambda2;\nvar lambda00$1;\nvar phi00$1;\nvar p0;\nvar deltaSum = adder();\nvar ranges;\nvar range$1;\n\nvar boundsStream = {\n  point: boundsPoint,\n  lineStart: boundsLineStart,\n  lineEnd: boundsLineEnd,\n  polygonStart: function() {\n    boundsStream.point = boundsRingPoint;\n    boundsStream.lineStart = boundsRingStart;\n    boundsStream.lineEnd = boundsRingEnd;\n    deltaSum.reset();\n    areaStream.polygonStart();\n  },\n  polygonEnd: function() {\n    areaStream.polygonEnd();\n    boundsStream.point = boundsPoint;\n    boundsStream.lineStart = boundsLineStart;\n    boundsStream.lineEnd = boundsLineEnd;\n    if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);\n    else if (deltaSum > epsilon$4) phi1 = 90;\n    else if (deltaSum < -epsilon$4) phi0 = -90;\n    range$1[0] = lambda0$1, range$1[1] = lambda1;\n  }\n};\n\nfunction boundsPoint(lambda, phi) {\n  ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);\n  if (phi < phi0) phi0 = phi;\n  if (phi > phi1) phi1 = phi;\n}\n\nfunction linePoint(lambda, phi) {\n  var p = cartesian([lambda * radians, phi * radians]);\n  if (p0) {\n    var normal = cartesianCross(p0, p),\n        equatorial = [normal[1], -normal[0], 0],\n        inflection = cartesianCross(equatorial, normal);\n    cartesianNormalizeInPlace(inflection);\n    inflection = spherical(inflection);\n    var delta = lambda - lambda2,\n        sign$$1 = delta > 0 ? 1 : -1,\n        lambdai = inflection[0] * degrees$1 * sign$$1,\n        phii,\n        antimeridian = abs(delta) > 180;\n    if (antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {\n      phii = inflection[1] * degrees$1;\n      if (phii > phi1) phi1 = phii;\n    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {\n      phii = -inflection[1] * degrees$1;\n      if (phii < phi0) phi0 = phii;\n    } else {\n      if (phi < phi0) phi0 = phi;\n      if (phi > phi1) phi1 = phi;\n    }\n    if (antimeridian) {\n      if (lambda < lambda2) {\n        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;\n      } else {\n        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;\n      }\n    } else {\n      if (lambda1 >= lambda0$1) {\n        if (lambda < lambda0$1) lambda0$1 = lambda;\n        if (lambda > lambda1) lambda1 = lambda;\n      } else {\n        if (lambda > lambda2) {\n          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;\n        } else {\n          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;\n        }\n      }\n    }\n  } else {\n    boundsPoint(lambda, phi);\n  }\n  p0 = p, lambda2 = lambda;\n}\n\nfunction boundsLineStart() {\n  boundsStream.point = linePoint;\n}\n\nfunction boundsLineEnd() {\n  range$1[0] = lambda0$1, range$1[1] = lambda1;\n  boundsStream.point = boundsPoint;\n  p0 = null;\n}\n\nfunction boundsRingPoint(lambda, phi) {\n  if (p0) {\n    var delta = lambda - lambda2;\n    deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);\n  } else {\n    lambda00$1 = lambda, phi00$1 = phi;\n  }\n  areaStream.point(lambda, phi);\n  linePoint(lambda, phi);\n}\n\nfunction boundsRingStart() {\n  areaStream.lineStart();\n}\n\nfunction boundsRingEnd() {\n  boundsRingPoint(lambda00$1, phi00$1);\n  areaStream.lineEnd();\n  if (abs(deltaSum) > epsilon$4) lambda0$1 = -(lambda1 = 180);\n  range$1[0] = lambda0$1, range$1[1] = lambda1;\n  p0 = null;\n}\n\n// Finds the left-right distance between two longitudes.\n// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want\n// the distance between ±180° to be 360°.\nfunction angle(lambda0, lambda1) {\n  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;\n}\n\nfunction rangeCompare(a, b) {\n  return a[0] - b[0];\n}\n\nfunction rangeContains(range, x) {\n  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;\n}\n\nvar bounds = function(feature) {\n  var i, n, a, b, merged, deltaMax, delta;\n\n  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);\n  ranges = [];\n  geoStream(feature, boundsStream);\n\n  // First, sort ranges by their minimum longitudes.\n  if (n = ranges.length) {\n    ranges.sort(rangeCompare);\n\n    // Then, merge any ranges that overlap.\n    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {\n      b = ranges[i];\n      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {\n        if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];\n        if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];\n      } else {\n        merged.push(a = b);\n      }\n    }\n\n    // Finally, find the largest gap between the merged ranges.\n    // The final bounding box will be the inverse of this gap.\n    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {\n      b = merged[i];\n      if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];\n    }\n  }\n\n  ranges = range$1 = null;\n\n  return lambda0$1 === Infinity || phi0 === Infinity\n      ? [[NaN, NaN], [NaN, NaN]]\n      : [[lambda0$1, phi0], [lambda1, phi1]];\n};\n\nvar W0;\nvar W1;\nvar X0;\nvar Y0;\nvar Z0;\nvar X1;\nvar Y1;\nvar Z1;\nvar X2;\nvar Y2;\nvar Z2;\nvar lambda00$2;\nvar phi00$2;\nvar x0;\nvar y0;\nvar z0; // previous point\n\nvar centroidStream = {\n  sphere: noop$2,\n  point: centroidPoint,\n  lineStart: centroidLineStart,\n  lineEnd: centroidLineEnd,\n  polygonStart: function() {\n    centroidStream.lineStart = centroidRingStart;\n    centroidStream.lineEnd = centroidRingEnd;\n  },\n  polygonEnd: function() {\n    centroidStream.lineStart = centroidLineStart;\n    centroidStream.lineEnd = centroidLineEnd;\n  }\n};\n\n// Arithmetic mean of Cartesian vectors.\nfunction centroidPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi);\n  centroidPointCartesian(cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi));\n}\n\nfunction centroidPointCartesian(x, y, z) {\n  ++W0;\n  X0 += (x - X0) / W0;\n  Y0 += (y - Y0) / W0;\n  Z0 += (z - Z0) / W0;\n}\n\nfunction centroidLineStart() {\n  centroidStream.point = centroidLinePointFirst;\n}\n\nfunction centroidLinePointFirst(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi);\n  x0 = cosPhi * cos$1(lambda);\n  y0 = cosPhi * sin$1(lambda);\n  z0 = sin$1(phi);\n  centroidStream.point = centroidLinePoint;\n  centroidPointCartesian(x0, y0, z0);\n}\n\nfunction centroidLinePoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi),\n      x = cosPhi * cos$1(lambda),\n      y = cosPhi * sin$1(lambda),\n      z = sin$1(phi),\n      w = atan2(sqrt$1((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);\n  W1 += w;\n  X1 += w * (x0 + (x0 = x));\n  Y1 += w * (y0 + (y0 = y));\n  Z1 += w * (z0 + (z0 = z));\n  centroidPointCartesian(x0, y0, z0);\n}\n\nfunction centroidLineEnd() {\n  centroidStream.point = centroidPoint;\n}\n\n// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,\n// J. Applied Mechanics 42, 239 (1975).\nfunction centroidRingStart() {\n  centroidStream.point = centroidRingPointFirst;\n}\n\nfunction centroidRingEnd() {\n  centroidRingPoint(lambda00$2, phi00$2);\n  centroidStream.point = centroidPoint;\n}\n\nfunction centroidRingPointFirst(lambda, phi) {\n  lambda00$2 = lambda, phi00$2 = phi;\n  lambda *= radians, phi *= radians;\n  centroidStream.point = centroidRingPoint;\n  var cosPhi = cos$1(phi);\n  x0 = cosPhi * cos$1(lambda);\n  y0 = cosPhi * sin$1(lambda);\n  z0 = sin$1(phi);\n  centroidPointCartesian(x0, y0, z0);\n}\n\nfunction centroidRingPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi),\n      x = cosPhi * cos$1(lambda),\n      y = cosPhi * sin$1(lambda),\n      z = sin$1(phi),\n      cx = y0 * z - z0 * y,\n      cy = z0 * x - x0 * z,\n      cz = x0 * y - y0 * x,\n      m = sqrt$1(cx * cx + cy * cy + cz * cz),\n      u = x0 * x + y0 * y + z0 * z,\n      v = m && -acos(u) / m, // area weight\n      w = atan2(m, u); // line weight\n  X2 += v * cx;\n  Y2 += v * cy;\n  Z2 += v * cz;\n  W1 += w;\n  X1 += w * (x0 + (x0 = x));\n  Y1 += w * (y0 + (y0 = y));\n  Z1 += w * (z0 + (z0 = z));\n  centroidPointCartesian(x0, y0, z0);\n}\n\nvar centroid$1 = function(object) {\n  W0 = W1 =\n  X0 = Y0 = Z0 =\n  X1 = Y1 = Z1 =\n  X2 = Y2 = Z2 = 0;\n  geoStream(object, centroidStream);\n\n  var x = X2,\n      y = Y2,\n      z = Z2,\n      m = x * x + y * y + z * z;\n\n  // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.\n  if (m < epsilon2$2) {\n    x = X1, y = Y1, z = Z1;\n    // If the feature has zero length, fall back to arithmetic mean of point vectors.\n    if (W1 < epsilon$4) x = X0, y = Y0, z = Z0;\n    m = x * x + y * y + z * z;\n    // If the feature still has an undefined ccentroid, then return.\n    if (m < epsilon2$2) return [NaN, NaN];\n  }\n\n  return [atan2(y, x) * degrees$1, asin$1(z / sqrt$1(m)) * degrees$1];\n};\n\nvar constant$13 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar compose = function(a, b) {\n\n  function compose(x, y) {\n    return x = a(x, y), b(x[0], x[1]);\n  }\n\n  if (a.invert && b.invert) compose.invert = function(x, y) {\n    return x = b.invert(x, y), x && a.invert(x[0], x[1]);\n  };\n\n  return compose;\n};\n\nfunction rotationIdentity(lambda, phi) {\n  return [lambda > pi$4 ? lambda - tau$4 : lambda < -pi$4 ? lambda + tau$4 : lambda, phi];\n}\n\nrotationIdentity.invert = rotationIdentity;\n\nfunction rotateRadians(deltaLambda, deltaPhi, deltaGamma) {\n  return (deltaLambda %= tau$4) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))\n    : rotationLambda(deltaLambda))\n    : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)\n    : rotationIdentity);\n}\n\nfunction forwardRotationLambda(deltaLambda) {\n  return function(lambda, phi) {\n    return lambda += deltaLambda, [lambda > pi$4 ? lambda - tau$4 : lambda < -pi$4 ? lambda + tau$4 : lambda, phi];\n  };\n}\n\nfunction rotationLambda(deltaLambda) {\n  var rotation = forwardRotationLambda(deltaLambda);\n  rotation.invert = forwardRotationLambda(-deltaLambda);\n  return rotation;\n}\n\nfunction rotationPhiGamma(deltaPhi, deltaGamma) {\n  var cosDeltaPhi = cos$1(deltaPhi),\n      sinDeltaPhi = sin$1(deltaPhi),\n      cosDeltaGamma = cos$1(deltaGamma),\n      sinDeltaGamma = sin$1(deltaGamma);\n\n  function rotation(lambda, phi) {\n    var cosPhi = cos$1(phi),\n        x = cos$1(lambda) * cosPhi,\n        y = sin$1(lambda) * cosPhi,\n        z = sin$1(phi),\n        k = z * cosDeltaPhi + x * sinDeltaPhi;\n    return [\n      atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),\n      asin$1(k * cosDeltaGamma + y * sinDeltaGamma)\n    ];\n  }\n\n  rotation.invert = function(lambda, phi) {\n    var cosPhi = cos$1(phi),\n        x = cos$1(lambda) * cosPhi,\n        y = sin$1(lambda) * cosPhi,\n        z = sin$1(phi),\n        k = z * cosDeltaGamma - y * sinDeltaGamma;\n    return [\n      atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),\n      asin$1(k * cosDeltaPhi - x * sinDeltaPhi)\n    ];\n  };\n\n  return rotation;\n}\n\nvar rotation = function(rotate) {\n  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);\n\n  function forward(coordinates) {\n    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);\n    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;\n  }\n\n  forward.invert = function(coordinates) {\n    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);\n    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;\n  };\n\n  return forward;\n};\n\n// Generates a circle centered at [0°, 0°], with a given radius and precision.\nfunction circleStream(stream, radius, delta, direction, t0, t1) {\n  if (!delta) return;\n  var cosRadius = cos$1(radius),\n      sinRadius = sin$1(radius),\n      step = direction * delta;\n  if (t0 == null) {\n    t0 = radius + direction * tau$4;\n    t1 = radius - step / 2;\n  } else {\n    t0 = circleRadius(cosRadius, t0);\n    t1 = circleRadius(cosRadius, t1);\n    if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau$4;\n  }\n  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {\n    point = spherical([cosRadius, -sinRadius * cos$1(t), -sinRadius * sin$1(t)]);\n    stream.point(point[0], point[1]);\n  }\n}\n\n// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].\nfunction circleRadius(cosRadius, point) {\n  point = cartesian(point), point[0] -= cosRadius;\n  cartesianNormalizeInPlace(point);\n  var radius = acos(-point[1]);\n  return ((-point[2] < 0 ? -radius : radius) + tau$4 - epsilon$4) % tau$4;\n}\n\nvar circle$1 = function() {\n  var center = constant$13([0, 0]),\n      radius = constant$13(90),\n      precision = constant$13(6),\n      ring,\n      rotate,\n      stream = {point: point};\n\n  function point(x, y) {\n    ring.push(x = rotate(x, y));\n    x[0] *= degrees$1, x[1] *= degrees$1;\n  }\n\n  function circle() {\n    var c = center.apply(this, arguments),\n        r = radius.apply(this, arguments) * radians,\n        p = precision.apply(this, arguments) * radians;\n    ring = [];\n    rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;\n    circleStream(stream, r, p, 1);\n    c = {type: \"Polygon\", coordinates: [ring]};\n    ring = rotate = null;\n    return c;\n  }\n\n  circle.center = function(_) {\n    return arguments.length ? (center = typeof _ === \"function\" ? _ : constant$13([+_[0], +_[1]]), circle) : center;\n  };\n\n  circle.radius = function(_) {\n    return arguments.length ? (radius = typeof _ === \"function\" ? _ : constant$13(+_), circle) : radius;\n  };\n\n  circle.precision = function(_) {\n    return arguments.length ? (precision = typeof _ === \"function\" ? _ : constant$13(+_), circle) : precision;\n  };\n\n  return circle;\n};\n\nvar clipBuffer = function() {\n  var lines = [],\n      line;\n  return {\n    point: function(x, y) {\n      line.push([x, y]);\n    },\n    lineStart: function() {\n      lines.push(line = []);\n    },\n    lineEnd: noop$2,\n    rejoin: function() {\n      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));\n    },\n    result: function() {\n      var result = lines;\n      lines = [];\n      line = null;\n      return result;\n    }\n  };\n};\n\nvar clipLine = function(a, b, x0, y0, x1, y1) {\n  var ax = a[0],\n      ay = a[1],\n      bx = b[0],\n      by = b[1],\n      t0 = 0,\n      t1 = 1,\n      dx = bx - ax,\n      dy = by - ay,\n      r;\n\n  r = x0 - ax;\n  if (!dx && r > 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dx > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = x1 - ax;\n  if (!dx && r < 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dx > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  r = y0 - ay;\n  if (!dy && r > 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dy > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = y1 - ay;\n  if (!dy && r < 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dy > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;\n  if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;\n  return true;\n};\n\nvar pointEqual = function(a, b) {\n  return abs(a[0] - b[0]) < epsilon$4 && abs(a[1] - b[1]) < epsilon$4;\n};\n\nfunction Intersection(point, points, other, entry) {\n  this.x = point;\n  this.z = points;\n  this.o = other; // another intersection\n  this.e = entry; // is an entry?\n  this.v = false; // visited\n  this.n = this.p = null; // next & previous\n}\n\n// A generalized polygon clipping algorithm: given a polygon that has been cut\n// into its visible line segments, and rejoins the segments by interpolating\n// along the clip edge.\nvar clipPolygon = function(segments, compareIntersection, startInside, interpolate, stream) {\n  var subject = [],\n      clip = [],\n      i,\n      n;\n\n  segments.forEach(function(segment) {\n    if ((n = segment.length - 1) <= 0) return;\n    var n, p0 = segment[0], p1 = segment[n], x;\n\n    // If the first and last points of a segment are coincident, then treat as a\n    // closed ring. TODO if all rings are closed, then the winding order of the\n    // exterior ring should be checked.\n    if (pointEqual(p0, p1)) {\n      stream.lineStart();\n      for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);\n      stream.lineEnd();\n      return;\n    }\n\n    subject.push(x = new Intersection(p0, segment, null, true));\n    clip.push(x.o = new Intersection(p0, null, x, false));\n    subject.push(x = new Intersection(p1, segment, null, false));\n    clip.push(x.o = new Intersection(p1, null, x, true));\n  });\n\n  if (!subject.length) return;\n\n  clip.sort(compareIntersection);\n  link$1(subject);\n  link$1(clip);\n\n  for (i = 0, n = clip.length; i < n; ++i) {\n    clip[i].e = startInside = !startInside;\n  }\n\n  var start = subject[0],\n      points,\n      point;\n\n  while (1) {\n    // Find first unvisited intersection.\n    var current = start,\n        isSubject = true;\n    while (current.v) if ((current = current.n) === start) return;\n    points = current.z;\n    stream.lineStart();\n    do {\n      current.v = current.o.v = true;\n      if (current.e) {\n        if (isSubject) {\n          for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);\n        } else {\n          interpolate(current.x, current.n.x, 1, stream);\n        }\n        current = current.n;\n      } else {\n        if (isSubject) {\n          points = current.p.z;\n          for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);\n        } else {\n          interpolate(current.x, current.p.x, -1, stream);\n        }\n        current = current.p;\n      }\n      current = current.o;\n      points = current.z;\n      isSubject = !isSubject;\n    } while (!current.v);\n    stream.lineEnd();\n  }\n};\n\nfunction link$1(array) {\n  if (!(n = array.length)) return;\n  var n,\n      i = 0,\n      a = array[0],\n      b;\n  while (++i < n) {\n    a.n = b = array[i];\n    b.p = a;\n    a = b;\n  }\n  a.n = b = array[0];\n  b.p = a;\n}\n\nvar clipMax = 1e9;\nvar clipMin = -clipMax;\n\n// TODO Use d3-polygon’s polygonContains here for the ring check?\n// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?\n\nfunction clipExtent(x0, y0, x1, y1) {\n\n  function visible(x, y) {\n    return x0 <= x && x <= x1 && y0 <= y && y <= y1;\n  }\n\n  function interpolate(from, to, direction, stream) {\n    var a = 0, a1 = 0;\n    if (from == null\n        || (a = corner(from, direction)) !== (a1 = corner(to, direction))\n        || comparePoint(from, to) < 0 ^ direction > 0) {\n      do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);\n      while ((a = (a + direction + 4) % 4) !== a1);\n    } else {\n      stream.point(to[0], to[1]);\n    }\n  }\n\n  function corner(p, direction) {\n    return abs(p[0] - x0) < epsilon$4 ? direction > 0 ? 0 : 3\n        : abs(p[0] - x1) < epsilon$4 ? direction > 0 ? 2 : 1\n        : abs(p[1] - y0) < epsilon$4 ? direction > 0 ? 1 : 0\n        : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon\n  }\n\n  function compareIntersection(a, b) {\n    return comparePoint(a.x, b.x);\n  }\n\n  function comparePoint(a, b) {\n    var ca = corner(a, 1),\n        cb = corner(b, 1);\n    return ca !== cb ? ca - cb\n        : ca === 0 ? b[1] - a[1]\n        : ca === 1 ? a[0] - b[0]\n        : ca === 2 ? a[1] - b[1]\n        : b[0] - a[0];\n  }\n\n  return function(stream) {\n    var activeStream = stream,\n        bufferStream = clipBuffer(),\n        segments,\n        polygon,\n        ring,\n        x__, y__, v__, // first point\n        x_, y_, v_, // previous point\n        first,\n        clean;\n\n    var clipStream = {\n      point: point,\n      lineStart: lineStart,\n      lineEnd: lineEnd,\n      polygonStart: polygonStart,\n      polygonEnd: polygonEnd\n    };\n\n    function point(x, y) {\n      if (visible(x, y)) activeStream.point(x, y);\n    }\n\n    function polygonInside() {\n      var winding = 0;\n\n      for (var i = 0, n = polygon.length; i < n; ++i) {\n        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {\n          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];\n          if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; }\n          else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; }\n        }\n      }\n\n      return winding;\n    }\n\n    // Buffer geometry within a polygon and then clip it en masse.\n    function polygonStart() {\n      activeStream = bufferStream, segments = [], polygon = [], clean = true;\n    }\n\n    function polygonEnd() {\n      var startInside = polygonInside(),\n          cleanInside = clean && startInside,\n          visible = (segments = merge(segments)).length;\n      if (cleanInside || visible) {\n        stream.polygonStart();\n        if (cleanInside) {\n          stream.lineStart();\n          interpolate(null, null, 1, stream);\n          stream.lineEnd();\n        }\n        if (visible) {\n          clipPolygon(segments, compareIntersection, startInside, interpolate, stream);\n        }\n        stream.polygonEnd();\n      }\n      activeStream = stream, segments = polygon = ring = null;\n    }\n\n    function lineStart() {\n      clipStream.point = linePoint;\n      if (polygon) polygon.push(ring = []);\n      first = true;\n      v_ = false;\n      x_ = y_ = NaN;\n    }\n\n    // TODO rather than special-case polygons, simply handle them separately.\n    // Ideally, coincident intersection points should be jittered to avoid\n    // clipping issues.\n    function lineEnd() {\n      if (segments) {\n        linePoint(x__, y__);\n        if (v__ && v_) bufferStream.rejoin();\n        segments.push(bufferStream.result());\n      }\n      clipStream.point = point;\n      if (v_) activeStream.lineEnd();\n    }\n\n    function linePoint(x, y) {\n      var v = visible(x, y);\n      if (polygon) ring.push([x, y]);\n      if (first) {\n        x__ = x, y__ = y, v__ = v;\n        first = false;\n        if (v) {\n          activeStream.lineStart();\n          activeStream.point(x, y);\n        }\n      } else {\n        if (v && v_) activeStream.point(x, y);\n        else {\n          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],\n              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];\n          if (clipLine(a, b, x0, y0, x1, y1)) {\n            if (!v_) {\n              activeStream.lineStart();\n              activeStream.point(a[0], a[1]);\n            }\n            activeStream.point(b[0], b[1]);\n            if (!v) activeStream.lineEnd();\n            clean = false;\n          } else if (v) {\n            activeStream.lineStart();\n            activeStream.point(x, y);\n            clean = false;\n          }\n        }\n      }\n      x_ = x, y_ = y, v_ = v;\n    }\n\n    return clipStream;\n  };\n}\n\nvar extent$1 = function() {\n  var x0 = 0,\n      y0 = 0,\n      x1 = 960,\n      y1 = 500,\n      cache,\n      cacheStream,\n      clip;\n\n  return clip = {\n    stream: function(stream) {\n      return cache && cacheStream === stream ? cache : cache = clipExtent(x0, y0, x1, y1)(cacheStream = stream);\n    },\n    extent: function(_) {\n      return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]];\n    }\n  };\n};\n\nvar lengthSum = adder();\nvar lambda0$2;\nvar sinPhi0$1;\nvar cosPhi0$1;\n\nvar lengthStream = {\n  sphere: noop$2,\n  point: noop$2,\n  lineStart: lengthLineStart,\n  lineEnd: noop$2,\n  polygonStart: noop$2,\n  polygonEnd: noop$2\n};\n\nfunction lengthLineStart() {\n  lengthStream.point = lengthPointFirst;\n  lengthStream.lineEnd = lengthLineEnd;\n}\n\nfunction lengthLineEnd() {\n  lengthStream.point = lengthStream.lineEnd = noop$2;\n}\n\nfunction lengthPointFirst(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  lambda0$2 = lambda, sinPhi0$1 = sin$1(phi), cosPhi0$1 = cos$1(phi);\n  lengthStream.point = lengthPoint;\n}\n\nfunction lengthPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var sinPhi = sin$1(phi),\n      cosPhi = cos$1(phi),\n      delta = abs(lambda - lambda0$2),\n      cosDelta = cos$1(delta),\n      sinDelta = sin$1(delta),\n      x = cosPhi * sinDelta,\n      y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,\n      z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;\n  lengthSum.add(atan2(sqrt$1(x * x + y * y), z));\n  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;\n}\n\nvar length$2 = function(object) {\n  lengthSum.reset();\n  geoStream(object, lengthStream);\n  return +lengthSum;\n};\n\nvar coordinates = [null, null];\nvar object$1 = {type: \"LineString\", coordinates: coordinates};\n\nvar distance = function(a, b) {\n  coordinates[0] = a;\n  coordinates[1] = b;\n  return length$2(object$1);\n};\n\nfunction graticuleX(y0, y1, dy) {\n  var y = range(y0, y1 - epsilon$4, dy).concat(y1);\n  return function(x) { return y.map(function(y) { return [x, y]; }); };\n}\n\nfunction graticuleY(x0, x1, dx) {\n  var x = range(x0, x1 - epsilon$4, dx).concat(x1);\n  return function(y) { return x.map(function(x) { return [x, y]; }); };\n}\n\nfunction graticule() {\n  var x1, x0, X1, X0,\n      y1, y0, Y1, Y0,\n      dx = 10, dy = dx, DX = 90, DY = 360,\n      x, y, X, Y,\n      precision = 2.5;\n\n  function graticule() {\n    return {type: \"MultiLineString\", coordinates: lines()};\n  }\n\n  function lines() {\n    return range(ceil(X0 / DX) * DX, X1, DX).map(X)\n        .concat(range(ceil(Y0 / DY) * DY, Y1, DY).map(Y))\n        .concat(range(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs(x % DX) > epsilon$4; }).map(x))\n        .concat(range(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs(y % DY) > epsilon$4; }).map(y));\n  }\n\n  graticule.lines = function() {\n    return lines().map(function(coordinates) { return {type: \"LineString\", coordinates: coordinates}; });\n  };\n\n  graticule.outline = function() {\n    return {\n      type: \"Polygon\",\n      coordinates: [\n        X(X0).concat(\n        Y(Y1).slice(1),\n        X(X1).reverse().slice(1),\n        Y(Y0).reverse().slice(1))\n      ]\n    };\n  };\n\n  graticule.extent = function(_) {\n    if (!arguments.length) return graticule.extentMinor();\n    return graticule.extentMajor(_).extentMinor(_);\n  };\n\n  graticule.extentMajor = function(_) {\n    if (!arguments.length) return [[X0, Y0], [X1, Y1]];\n    X0 = +_[0][0], X1 = +_[1][0];\n    Y0 = +_[0][1], Y1 = +_[1][1];\n    if (X0 > X1) _ = X0, X0 = X1, X1 = _;\n    if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;\n    return graticule.precision(precision);\n  };\n\n  graticule.extentMinor = function(_) {\n    if (!arguments.length) return [[x0, y0], [x1, y1]];\n    x0 = +_[0][0], x1 = +_[1][0];\n    y0 = +_[0][1], y1 = +_[1][1];\n    if (x0 > x1) _ = x0, x0 = x1, x1 = _;\n    if (y0 > y1) _ = y0, y0 = y1, y1 = _;\n    return graticule.precision(precision);\n  };\n\n  graticule.step = function(_) {\n    if (!arguments.length) return graticule.stepMinor();\n    return graticule.stepMajor(_).stepMinor(_);\n  };\n\n  graticule.stepMajor = function(_) {\n    if (!arguments.length) return [DX, DY];\n    DX = +_[0], DY = +_[1];\n    return graticule;\n  };\n\n  graticule.stepMinor = function(_) {\n    if (!arguments.length) return [dx, dy];\n    dx = +_[0], dy = +_[1];\n    return graticule;\n  };\n\n  graticule.precision = function(_) {\n    if (!arguments.length) return precision;\n    precision = +_;\n    x = graticuleX(y0, y1, 90);\n    y = graticuleY(x0, x1, precision);\n    X = graticuleX(Y0, Y1, 90);\n    Y = graticuleY(X0, X1, precision);\n    return graticule;\n  };\n\n  return graticule\n      .extentMajor([[-180, -90 + epsilon$4], [180, 90 - epsilon$4]])\n      .extentMinor([[-180, -80 - epsilon$4], [180, 80 + epsilon$4]]);\n}\n\nfunction graticule10() {\n  return graticule()();\n}\n\nvar interpolate$2 = function(a, b) {\n  var x0 = a[0] * radians,\n      y0 = a[1] * radians,\n      x1 = b[0] * radians,\n      y1 = b[1] * radians,\n      cy0 = cos$1(y0),\n      sy0 = sin$1(y0),\n      cy1 = cos$1(y1),\n      sy1 = sin$1(y1),\n      kx0 = cy0 * cos$1(x0),\n      ky0 = cy0 * sin$1(x0),\n      kx1 = cy1 * cos$1(x1),\n      ky1 = cy1 * sin$1(x1),\n      d = 2 * asin$1(sqrt$1(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))),\n      k = sin$1(d);\n\n  var interpolate = d ? function(t) {\n    var B = sin$1(t *= d) / k,\n        A = sin$1(d - t) / k,\n        x = A * kx0 + B * kx1,\n        y = A * ky0 + B * ky1,\n        z = A * sy0 + B * sy1;\n    return [\n      atan2(y, x) * degrees$1,\n      atan2(z, sqrt$1(x * x + y * y)) * degrees$1\n    ];\n  } : function() {\n    return [x0 * degrees$1, y0 * degrees$1];\n  };\n\n  interpolate.distance = d;\n\n  return interpolate;\n};\n\nvar identity$7 = function(x) {\n  return x;\n};\n\nvar areaSum$1 = adder();\nvar areaRingSum$1 = adder();\nvar x00;\nvar y00;\nvar x0$1;\nvar y0$1;\n\nvar areaStream$1 = {\n  point: noop$2,\n  lineStart: noop$2,\n  lineEnd: noop$2,\n  polygonStart: function() {\n    areaStream$1.lineStart = areaRingStart$1;\n    areaStream$1.lineEnd = areaRingEnd$1;\n  },\n  polygonEnd: function() {\n    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$2;\n    areaSum$1.add(abs(areaRingSum$1));\n    areaRingSum$1.reset();\n  },\n  result: function() {\n    var area = areaSum$1 / 2;\n    areaSum$1.reset();\n    return area;\n  }\n};\n\nfunction areaRingStart$1() {\n  areaStream$1.point = areaPointFirst$1;\n}\n\nfunction areaPointFirst$1(x, y) {\n  areaStream$1.point = areaPoint$1;\n  x00 = x0$1 = x, y00 = y0$1 = y;\n}\n\nfunction areaPoint$1(x, y) {\n  areaRingSum$1.add(y0$1 * x - x0$1 * y);\n  x0$1 = x, y0$1 = y;\n}\n\nfunction areaRingEnd$1() {\n  areaPoint$1(x00, y00);\n}\n\nvar x0$2 = Infinity;\nvar y0$2 = x0$2;\nvar x1 = -x0$2;\nvar y1 = x1;\n\nvar boundsStream$1 = {\n  point: boundsPoint$1,\n  lineStart: noop$2,\n  lineEnd: noop$2,\n  polygonStart: noop$2,\n  polygonEnd: noop$2,\n  result: function() {\n    var bounds = [[x0$2, y0$2], [x1, y1]];\n    x1 = y1 = -(y0$2 = x0$2 = Infinity);\n    return bounds;\n  }\n};\n\nfunction boundsPoint$1(x, y) {\n  if (x < x0$2) x0$2 = x;\n  if (x > x1) x1 = x;\n  if (y < y0$2) y0$2 = y;\n  if (y > y1) y1 = y;\n}\n\n// TODO Enforce positive area for exterior, negative area for interior?\n\nvar X0$1 = 0;\nvar Y0$1 = 0;\nvar Z0$1 = 0;\nvar X1$1 = 0;\nvar Y1$1 = 0;\nvar Z1$1 = 0;\nvar X2$1 = 0;\nvar Y2$1 = 0;\nvar Z2$1 = 0;\nvar x00$1;\nvar y00$1;\nvar x0$3;\nvar y0$3;\n\nvar centroidStream$1 = {\n  point: centroidPoint$1,\n  lineStart: centroidLineStart$1,\n  lineEnd: centroidLineEnd$1,\n  polygonStart: function() {\n    centroidStream$1.lineStart = centroidRingStart$1;\n    centroidStream$1.lineEnd = centroidRingEnd$1;\n  },\n  polygonEnd: function() {\n    centroidStream$1.point = centroidPoint$1;\n    centroidStream$1.lineStart = centroidLineStart$1;\n    centroidStream$1.lineEnd = centroidLineEnd$1;\n  },\n  result: function() {\n    var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]\n        : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]\n        : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]\n        : [NaN, NaN];\n    X0$1 = Y0$1 = Z0$1 =\n    X1$1 = Y1$1 = Z1$1 =\n    X2$1 = Y2$1 = Z2$1 = 0;\n    return centroid;\n  }\n};\n\nfunction centroidPoint$1(x, y) {\n  X0$1 += x;\n  Y0$1 += y;\n  ++Z0$1;\n}\n\nfunction centroidLineStart$1() {\n  centroidStream$1.point = centroidPointFirstLine;\n}\n\nfunction centroidPointFirstLine(x, y) {\n  centroidStream$1.point = centroidPointLine;\n  centroidPoint$1(x0$3 = x, y0$3 = y);\n}\n\nfunction centroidPointLine(x, y) {\n  var dx = x - x0$3, dy = y - y0$3, z = sqrt$1(dx * dx + dy * dy);\n  X1$1 += z * (x0$3 + x) / 2;\n  Y1$1 += z * (y0$3 + y) / 2;\n  Z1$1 += z;\n  centroidPoint$1(x0$3 = x, y0$3 = y);\n}\n\nfunction centroidLineEnd$1() {\n  centroidStream$1.point = centroidPoint$1;\n}\n\nfunction centroidRingStart$1() {\n  centroidStream$1.point = centroidPointFirstRing;\n}\n\nfunction centroidRingEnd$1() {\n  centroidPointRing(x00$1, y00$1);\n}\n\nfunction centroidPointFirstRing(x, y) {\n  centroidStream$1.point = centroidPointRing;\n  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);\n}\n\nfunction centroidPointRing(x, y) {\n  var dx = x - x0$3,\n      dy = y - y0$3,\n      z = sqrt$1(dx * dx + dy * dy);\n\n  X1$1 += z * (x0$3 + x) / 2;\n  Y1$1 += z * (y0$3 + y) / 2;\n  Z1$1 += z;\n\n  z = y0$3 * x - x0$3 * y;\n  X2$1 += z * (x0$3 + x);\n  Y2$1 += z * (y0$3 + y);\n  Z2$1 += z * 3;\n  centroidPoint$1(x0$3 = x, y0$3 = y);\n}\n\nfunction PathContext(context) {\n  this._context = context;\n}\n\nPathContext.prototype = {\n  _radius: 4.5,\n  pointRadius: function(_) {\n    return this._radius = _, this;\n  },\n  polygonStart: function() {\n    this._line = 0;\n  },\n  polygonEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line === 0) this._context.closePath();\n    this._point = NaN;\n  },\n  point: function(x, y) {\n    switch (this._point) {\n      case 0: {\n        this._context.moveTo(x, y);\n        this._point = 1;\n        break;\n      }\n      case 1: {\n        this._context.lineTo(x, y);\n        break;\n      }\n      default: {\n        this._context.moveTo(x + this._radius, y);\n        this._context.arc(x, y, this._radius, 0, tau$4);\n        break;\n      }\n    }\n  },\n  result: noop$2\n};\n\nfunction PathString() {\n  this._string = [];\n}\n\nPathString.prototype = {\n  _circle: circle$2(4.5),\n  pointRadius: function(_) {\n    return this._circle = circle$2(_), this;\n  },\n  polygonStart: function() {\n    this._line = 0;\n  },\n  polygonEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line === 0) this._string.push(\"Z\");\n    this._point = NaN;\n  },\n  point: function(x, y) {\n    switch (this._point) {\n      case 0: {\n        this._string.push(\"M\", x, \",\", y);\n        this._point = 1;\n        break;\n      }\n      case 1: {\n        this._string.push(\"L\", x, \",\", y);\n        break;\n      }\n      default: {\n        this._string.push(\"M\", x, \",\", y, this._circle);\n        break;\n      }\n    }\n  },\n  result: function() {\n    if (this._string.length) {\n      var result = this._string.join(\"\");\n      this._string = [];\n      return result;\n    }\n  }\n};\n\nfunction circle$2(radius) {\n  return \"m0,\" + radius\n      + \"a\" + radius + \",\" + radius + \" 0 1,1 0,\" + -2 * radius\n      + \"a\" + radius + \",\" + radius + \" 0 1,1 0,\" + 2 * radius\n      + \"z\";\n}\n\nvar index$3 = function(projection, context) {\n  var pointRadius = 4.5,\n      projectionStream,\n      contextStream;\n\n  function path(object) {\n    if (object) {\n      if (typeof pointRadius === \"function\") contextStream.pointRadius(+pointRadius.apply(this, arguments));\n      geoStream(object, projectionStream(contextStream));\n    }\n    return contextStream.result();\n  }\n\n  path.area = function(object) {\n    geoStream(object, projectionStream(areaStream$1));\n    return areaStream$1.result();\n  };\n\n  path.bounds = function(object) {\n    geoStream(object, projectionStream(boundsStream$1));\n    return boundsStream$1.result();\n  };\n\n  path.centroid = function(object) {\n    geoStream(object, projectionStream(centroidStream$1));\n    return centroidStream$1.result();\n  };\n\n  path.projection = function(_) {\n    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$7) : (projection = _).stream, path) : projection;\n  };\n\n  path.context = function(_) {\n    if (!arguments.length) return context;\n    contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _);\n    if (typeof pointRadius !== \"function\") contextStream.pointRadius(pointRadius);\n    return path;\n  };\n\n  path.pointRadius = function(_) {\n    if (!arguments.length) return pointRadius;\n    pointRadius = typeof _ === \"function\" ? _ : (contextStream.pointRadius(+_), +_);\n    return path;\n  };\n\n  return path.projection(projection).context(context);\n};\n\nvar sum$2 = adder();\n\nvar polygonContains = function(polygon, point) {\n  var lambda = point[0],\n      phi = point[1],\n      normal = [sin$1(lambda), -cos$1(lambda), 0],\n      angle = 0,\n      winding = 0;\n\n  sum$2.reset();\n\n  for (var i = 0, n = polygon.length; i < n; ++i) {\n    if (!(m = (ring = polygon[i]).length)) continue;\n    var ring,\n        m,\n        point0 = ring[m - 1],\n        lambda0 = point0[0],\n        phi0 = point0[1] / 2 + quarterPi,\n        sinPhi0 = sin$1(phi0),\n        cosPhi0 = cos$1(phi0);\n\n    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {\n      var point1 = ring[j],\n          lambda1 = point1[0],\n          phi1 = point1[1] / 2 + quarterPi,\n          sinPhi1 = sin$1(phi1),\n          cosPhi1 = cos$1(phi1),\n          delta = lambda1 - lambda0,\n          sign$$1 = delta >= 0 ? 1 : -1,\n          absDelta = sign$$1 * delta,\n          antimeridian = absDelta > pi$4,\n          k = sinPhi0 * sinPhi1;\n\n      sum$2.add(atan2(k * sign$$1 * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));\n      angle += antimeridian ? delta + sign$$1 * tau$4 : delta;\n\n      // Are the longitudes either side of the point’s meridian (lambda),\n      // and are the latitudes smaller than the parallel (phi)?\n      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {\n        var arc = cartesianCross(cartesian(point0), cartesian(point1));\n        cartesianNormalizeInPlace(arc);\n        var intersection = cartesianCross(normal, arc);\n        cartesianNormalizeInPlace(intersection);\n        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin$1(intersection[2]);\n        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {\n          winding += antimeridian ^ delta >= 0 ? 1 : -1;\n        }\n      }\n    }\n  }\n\n  // First, determine whether the South pole is inside or outside:\n  //\n  // It is inside if:\n  // * the polygon winds around it in a clockwise direction.\n  // * the polygon does not (cumulatively) wind around it, but has a negative\n  //   (counter-clockwise) area.\n  //\n  // Second, count the (signed) number of times a segment crosses a lambda\n  // from the point to the South pole.  If it is zero, then the point is the\n  // same side as the South pole.\n\n  return (angle < -epsilon$4 || angle < epsilon$4 && sum$2 < -epsilon$4) ^ (winding & 1);\n};\n\nvar clip = function(pointVisible, clipLine, interpolate, start) {\n  return function(rotate, sink) {\n    var line = clipLine(sink),\n        rotatedStart = rotate.invert(start[0], start[1]),\n        ringBuffer = clipBuffer(),\n        ringSink = clipLine(ringBuffer),\n        polygonStarted = false,\n        polygon,\n        segments,\n        ring;\n\n    var clip = {\n      point: point,\n      lineStart: lineStart,\n      lineEnd: lineEnd,\n      polygonStart: function() {\n        clip.point = pointRing;\n        clip.lineStart = ringStart;\n        clip.lineEnd = ringEnd;\n        segments = [];\n        polygon = [];\n      },\n      polygonEnd: function() {\n        clip.point = point;\n        clip.lineStart = lineStart;\n        clip.lineEnd = lineEnd;\n        segments = merge(segments);\n        var startInside = polygonContains(polygon, rotatedStart);\n        if (segments.length) {\n          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;\n          clipPolygon(segments, compareIntersection, startInside, interpolate, sink);\n        } else if (startInside) {\n          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;\n          sink.lineStart();\n          interpolate(null, null, 1, sink);\n          sink.lineEnd();\n        }\n        if (polygonStarted) sink.polygonEnd(), polygonStarted = false;\n        segments = polygon = null;\n      },\n      sphere: function() {\n        sink.polygonStart();\n        sink.lineStart();\n        interpolate(null, null, 1, sink);\n        sink.lineEnd();\n        sink.polygonEnd();\n      }\n    };\n\n    function point(lambda, phi) {\n      var point = rotate(lambda, phi);\n      if (pointVisible(lambda = point[0], phi = point[1])) sink.point(lambda, phi);\n    }\n\n    function pointLine(lambda, phi) {\n      var point = rotate(lambda, phi);\n      line.point(point[0], point[1]);\n    }\n\n    function lineStart() {\n      clip.point = pointLine;\n      line.lineStart();\n    }\n\n    function lineEnd() {\n      clip.point = point;\n      line.lineEnd();\n    }\n\n    function pointRing(lambda, phi) {\n      ring.push([lambda, phi]);\n      var point = rotate(lambda, phi);\n      ringSink.point(point[0], point[1]);\n    }\n\n    function ringStart() {\n      ringSink.lineStart();\n      ring = [];\n    }\n\n    function ringEnd() {\n      pointRing(ring[0][0], ring[0][1]);\n      ringSink.lineEnd();\n\n      var clean = ringSink.clean(),\n          ringSegments = ringBuffer.result(),\n          i, n = ringSegments.length, m,\n          segment,\n          point;\n\n      ring.pop();\n      polygon.push(ring);\n      ring = null;\n\n      if (!n) return;\n\n      // No intersections.\n      if (clean & 1) {\n        segment = ringSegments[0];\n        if ((m = segment.length - 1) > 0) {\n          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;\n          sink.lineStart();\n          for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);\n          sink.lineEnd();\n        }\n        return;\n      }\n\n      // Rejoin connected segments.\n      // TODO reuse ringBuffer.rejoin()?\n      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));\n\n      segments.push(ringSegments.filter(validSegment));\n    }\n\n    return clip;\n  };\n};\n\nfunction validSegment(segment) {\n  return segment.length > 1;\n}\n\n// Intersections are sorted along the clip edge. For both antimeridian cutting\n// and circle clipping, the same comparison is used.\nfunction compareIntersection(a, b) {\n  return ((a = a.x)[0] < 0 ? a[1] - halfPi$3 - epsilon$4 : halfPi$3 - a[1])\n       - ((b = b.x)[0] < 0 ? b[1] - halfPi$3 - epsilon$4 : halfPi$3 - b[1]);\n}\n\nvar clipAntimeridian = clip(\n  function() { return true; },\n  clipAntimeridianLine,\n  clipAntimeridianInterpolate,\n  [-pi$4, -halfPi$3]\n);\n\n// Takes a line and cuts into visible segments. Return values: 0 - there were\n// intersections or the line was empty; 1 - no intersections; 2 - there were\n// intersections, and the first and last segments should be rejoined.\nfunction clipAntimeridianLine(stream) {\n  var lambda0 = NaN,\n      phi0 = NaN,\n      sign0 = NaN,\n      clean; // no intersections\n\n  return {\n    lineStart: function() {\n      stream.lineStart();\n      clean = 1;\n    },\n    point: function(lambda1, phi1) {\n      var sign1 = lambda1 > 0 ? pi$4 : -pi$4,\n          delta = abs(lambda1 - lambda0);\n      if (abs(delta - pi$4) < epsilon$4) { // line crosses a pole\n        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi$3 : -halfPi$3);\n        stream.point(sign0, phi0);\n        stream.lineEnd();\n        stream.lineStart();\n        stream.point(sign1, phi0);\n        stream.point(lambda1, phi0);\n        clean = 0;\n      } else if (sign0 !== sign1 && delta >= pi$4) { // line crosses antimeridian\n        if (abs(lambda0 - sign0) < epsilon$4) lambda0 -= sign0 * epsilon$4; // handle degeneracies\n        if (abs(lambda1 - sign1) < epsilon$4) lambda1 -= sign1 * epsilon$4;\n        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);\n        stream.point(sign0, phi0);\n        stream.lineEnd();\n        stream.lineStart();\n        stream.point(sign1, phi0);\n        clean = 0;\n      }\n      stream.point(lambda0 = lambda1, phi0 = phi1);\n      sign0 = sign1;\n    },\n    lineEnd: function() {\n      stream.lineEnd();\n      lambda0 = phi0 = NaN;\n    },\n    clean: function() {\n      return 2 - clean; // if intersections, rejoin first and last segments\n    }\n  };\n}\n\nfunction clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {\n  var cosPhi0,\n      cosPhi1,\n      sinLambda0Lambda1 = sin$1(lambda0 - lambda1);\n  return abs(sinLambda0Lambda1) > epsilon$4\n      ? atan((sin$1(phi0) * (cosPhi1 = cos$1(phi1)) * sin$1(lambda1)\n          - sin$1(phi1) * (cosPhi0 = cos$1(phi0)) * sin$1(lambda0))\n          / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))\n      : (phi0 + phi1) / 2;\n}\n\nfunction clipAntimeridianInterpolate(from, to, direction, stream) {\n  var phi;\n  if (from == null) {\n    phi = direction * halfPi$3;\n    stream.point(-pi$4, phi);\n    stream.point(0, phi);\n    stream.point(pi$4, phi);\n    stream.point(pi$4, 0);\n    stream.point(pi$4, -phi);\n    stream.point(0, -phi);\n    stream.point(-pi$4, -phi);\n    stream.point(-pi$4, 0);\n    stream.point(-pi$4, phi);\n  } else if (abs(from[0] - to[0]) > epsilon$4) {\n    var lambda = from[0] < to[0] ? pi$4 : -pi$4;\n    phi = direction * lambda / 2;\n    stream.point(-lambda, phi);\n    stream.point(0, phi);\n    stream.point(lambda, phi);\n  } else {\n    stream.point(to[0], to[1]);\n  }\n}\n\nvar clipCircle = function(radius, delta) {\n  var cr = cos$1(radius),\n      smallRadius = cr > 0,\n      notHemisphere = abs(cr) > epsilon$4; // TODO optimise for this common case\n\n  function interpolate(from, to, direction, stream) {\n    circleStream(stream, radius, delta, direction, from, to);\n  }\n\n  function visible(lambda, phi) {\n    return cos$1(lambda) * cos$1(phi) > cr;\n  }\n\n  // Takes a line and cuts into visible segments. Return values used for polygon\n  // clipping: 0 - there were intersections or the line was empty; 1 - no\n  // intersections 2 - there were intersections, and the first and last segments\n  // should be rejoined.\n  function clipLine(stream) {\n    var point0, // previous point\n        c0, // code for previous point\n        v0, // visibility of previous point\n        v00, // visibility of first point\n        clean; // no intersections\n    return {\n      lineStart: function() {\n        v00 = v0 = false;\n        clean = 1;\n      },\n      point: function(lambda, phi) {\n        var point1 = [lambda, phi],\n            point2,\n            v = visible(lambda, phi),\n            c = smallRadius\n              ? v ? 0 : code(lambda, phi)\n              : v ? code(lambda + (lambda < 0 ? pi$4 : -pi$4), phi) : 0;\n        if (!point0 && (v00 = v0 = v)) stream.lineStart();\n        // Handle degeneracies.\n        // TODO ignore if not clipping polygons.\n        if (v !== v0) {\n          point2 = intersect(point0, point1);\n          if (pointEqual(point0, point2) || pointEqual(point1, point2)) {\n            point1[0] += epsilon$4;\n            point1[1] += epsilon$4;\n            v = visible(point1[0], point1[1]);\n          }\n        }\n        if (v !== v0) {\n          clean = 0;\n          if (v) {\n            // outside going in\n            stream.lineStart();\n            point2 = intersect(point1, point0);\n            stream.point(point2[0], point2[1]);\n          } else {\n            // inside going out\n            point2 = intersect(point0, point1);\n            stream.point(point2[0], point2[1]);\n            stream.lineEnd();\n          }\n          point0 = point2;\n        } else if (notHemisphere && point0 && smallRadius ^ v) {\n          var t;\n          // If the codes for two points are different, or are both zero,\n          // and there this segment intersects with the small circle.\n          if (!(c & c0) && (t = intersect(point1, point0, true))) {\n            clean = 0;\n            if (smallRadius) {\n              stream.lineStart();\n              stream.point(t[0][0], t[0][1]);\n              stream.point(t[1][0], t[1][1]);\n              stream.lineEnd();\n            } else {\n              stream.point(t[1][0], t[1][1]);\n              stream.lineEnd();\n              stream.lineStart();\n              stream.point(t[0][0], t[0][1]);\n            }\n          }\n        }\n        if (v && (!point0 || !pointEqual(point0, point1))) {\n          stream.point(point1[0], point1[1]);\n        }\n        point0 = point1, v0 = v, c0 = c;\n      },\n      lineEnd: function() {\n        if (v0) stream.lineEnd();\n        point0 = null;\n      },\n      // Rejoin first and last segments if there were intersections and the first\n      // and last points were visible.\n      clean: function() {\n        return clean | ((v00 && v0) << 1);\n      }\n    };\n  }\n\n  // Intersects the great circle between a and b with the clip circle.\n  function intersect(a, b, two) {\n    var pa = cartesian(a),\n        pb = cartesian(b);\n\n    // We have two planes, n1.p = d1 and n2.p = d2.\n    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).\n    var n1 = [1, 0, 0], // normal\n        n2 = cartesianCross(pa, pb),\n        n2n2 = cartesianDot(n2, n2),\n        n1n2 = n2[0], // cartesianDot(n1, n2),\n        determinant = n2n2 - n1n2 * n1n2;\n\n    // Two polar points.\n    if (!determinant) return !two && a;\n\n    var c1 =  cr * n2n2 / determinant,\n        c2 = -cr * n1n2 / determinant,\n        n1xn2 = cartesianCross(n1, n2),\n        A = cartesianScale(n1, c1),\n        B = cartesianScale(n2, c2);\n    cartesianAddInPlace(A, B);\n\n    // Solve |p(t)|^2 = 1.\n    var u = n1xn2,\n        w = cartesianDot(A, u),\n        uu = cartesianDot(u, u),\n        t2 = w * w - uu * (cartesianDot(A, A) - 1);\n\n    if (t2 < 0) return;\n\n    var t = sqrt$1(t2),\n        q = cartesianScale(u, (-w - t) / uu);\n    cartesianAddInPlace(q, A);\n    q = spherical(q);\n\n    if (!two) return q;\n\n    // Two intersection points.\n    var lambda0 = a[0],\n        lambda1 = b[0],\n        phi0 = a[1],\n        phi1 = b[1],\n        z;\n\n    if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;\n\n    var delta = lambda1 - lambda0,\n        polar = abs(delta - pi$4) < epsilon$4,\n        meridian = polar || delta < epsilon$4;\n\n    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;\n\n    // Check that the first point is between a and b.\n    if (meridian\n        ? polar\n          ? phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon$4 ? phi0 : phi1)\n          : phi0 <= q[1] && q[1] <= phi1\n        : delta > pi$4 ^ (lambda0 <= q[0] && q[0] <= lambda1)) {\n      var q1 = cartesianScale(u, (-w + t) / uu);\n      cartesianAddInPlace(q1, A);\n      return [q, spherical(q1)];\n    }\n  }\n\n  // Generates a 4-bit vector representing the location of a point relative to\n  // the small circle's bounding box.\n  function code(lambda, phi) {\n    var r = smallRadius ? radius : pi$4 - radius,\n        code = 0;\n    if (lambda < -r) code |= 1; // left\n    else if (lambda > r) code |= 2; // right\n    if (phi < -r) code |= 4; // below\n    else if (phi > r) code |= 8; // above\n    return code;\n  }\n\n  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$4, radius - pi$4]);\n};\n\nvar transform$1 = function(methods) {\n  return {\n    stream: transformer(methods)\n  };\n};\n\nfunction transformer(methods) {\n  return function(stream) {\n    var s = new TransformStream;\n    for (var key in methods) s[key] = methods[key];\n    s.stream = stream;\n    return s;\n  };\n}\n\nfunction TransformStream() {}\n\nTransformStream.prototype = {\n  constructor: TransformStream,\n  point: function(x, y) { this.stream.point(x, y); },\n  sphere: function() { this.stream.sphere(); },\n  lineStart: function() { this.stream.lineStart(); },\n  lineEnd: function() { this.stream.lineEnd(); },\n  polygonStart: function() { this.stream.polygonStart(); },\n  polygonEnd: function() { this.stream.polygonEnd(); }\n};\n\nfunction fitExtent(projection, extent, object) {\n  var w = extent[1][0] - extent[0][0],\n      h = extent[1][1] - extent[0][1],\n      clip = projection.clipExtent && projection.clipExtent();\n\n  projection\n      .scale(150)\n      .translate([0, 0]);\n\n  if (clip != null) projection.clipExtent(null);\n\n  geoStream(object, projection.stream(boundsStream$1));\n\n  var b = boundsStream$1.result(),\n      k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),\n      x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,\n      y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;\n\n  if (clip != null) projection.clipExtent(clip);\n\n  return projection\n      .scale(k * 150)\n      .translate([x, y]);\n}\n\nfunction fitSize(projection, size, object) {\n  return fitExtent(projection, [[0, 0], size], object);\n}\n\nvar maxDepth = 16;\nvar cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance)\n\nvar resample = function(project, delta2) {\n  return +delta2 ? resample$1(project, delta2) : resampleNone(project);\n};\n\nfunction resampleNone(project) {\n  return transformer({\n    point: function(x, y) {\n      x = project(x, y);\n      this.stream.point(x[0], x[1]);\n    }\n  });\n}\n\nfunction resample$1(project, delta2) {\n\n  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {\n    var dx = x1 - x0,\n        dy = y1 - y0,\n        d2 = dx * dx + dy * dy;\n    if (d2 > 4 * delta2 && depth--) {\n      var a = a0 + a1,\n          b = b0 + b1,\n          c = c0 + c1,\n          m = sqrt$1(a * a + b * b + c * c),\n          phi2 = asin$1(c /= m),\n          lambda2 = abs(abs(c) - 1) < epsilon$4 || abs(lambda0 - lambda1) < epsilon$4 ? (lambda0 + lambda1) / 2 : atan2(b, a),\n          p = project(lambda2, phi2),\n          x2 = p[0],\n          y2 = p[1],\n          dx2 = x2 - x0,\n          dy2 = y2 - y0,\n          dz = dy * dx2 - dx * dy2;\n      if (dz * dz / d2 > delta2 // perpendicular projected distance\n          || abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end\n          || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance\n        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);\n        stream.point(x2, y2);\n        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);\n      }\n    }\n  }\n  return function(stream) {\n    var lambda00, x00, y00, a00, b00, c00, // first point\n        lambda0, x0, y0, a0, b0, c0; // previous point\n\n    var resampleStream = {\n      point: point,\n      lineStart: lineStart,\n      lineEnd: lineEnd,\n      polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },\n      polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }\n    };\n\n    function point(x, y) {\n      x = project(x, y);\n      stream.point(x[0], x[1]);\n    }\n\n    function lineStart() {\n      x0 = NaN;\n      resampleStream.point = linePoint;\n      stream.lineStart();\n    }\n\n    function linePoint(lambda, phi) {\n      var c = cartesian([lambda, phi]), p = project(lambda, phi);\n      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);\n      stream.point(x0, y0);\n    }\n\n    function lineEnd() {\n      resampleStream.point = point;\n      stream.lineEnd();\n    }\n\n    function ringStart() {\n      lineStart();\n      resampleStream.point = ringPoint;\n      resampleStream.lineEnd = ringEnd;\n    }\n\n    function ringPoint(lambda, phi) {\n      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;\n      resampleStream.point = linePoint;\n    }\n\n    function ringEnd() {\n      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);\n      resampleStream.lineEnd = lineEnd;\n      lineEnd();\n    }\n\n    return resampleStream;\n  };\n}\n\nvar transformRadians = transformer({\n  point: function(x, y) {\n    this.stream.point(x * radians, y * radians);\n  }\n});\n\nfunction projection(project) {\n  return projectionMutator(function() { return project; })();\n}\n\nfunction projectionMutator(projectAt) {\n  var project,\n      k = 150, // scale\n      x = 480, y = 250, // translate\n      dx, dy, lambda = 0, phi = 0, // center\n      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, projectRotate, // rotate\n      theta = null, preclip = clipAntimeridian, // clip angle\n      x0 = null, y0, x1, y1, postclip = identity$7, // clip extent\n      delta2 = 0.5, projectResample = resample(projectTransform, delta2), // precision\n      cache,\n      cacheStream;\n\n  function projection(point) {\n    point = projectRotate(point[0] * radians, point[1] * radians);\n    return [point[0] * k + dx, dy - point[1] * k];\n  }\n\n  function invert(point) {\n    point = projectRotate.invert((point[0] - dx) / k, (dy - point[1]) / k);\n    return point && [point[0] * degrees$1, point[1] * degrees$1];\n  }\n\n  function projectTransform(x, y) {\n    return x = project(x, y), [x[0] * k + dx, dy - x[1] * k];\n  }\n\n  projection.stream = function(stream) {\n    return cache && cacheStream === stream ? cache : cache = transformRadians(preclip(rotate, projectResample(postclip(cacheStream = stream))));\n  };\n\n  projection.clipAngle = function(_) {\n    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians, 6 * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;\n  };\n\n  projection.clipExtent = function(_) {\n    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$7) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];\n  };\n\n  projection.scale = function(_) {\n    return arguments.length ? (k = +_, recenter()) : k;\n  };\n\n  projection.translate = function(_) {\n    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];\n  };\n\n  projection.center = function(_) {\n    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];\n  };\n\n  projection.rotate = function(_) {\n    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];\n  };\n\n  projection.precision = function(_) {\n    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt$1(delta2);\n  };\n\n  projection.fitExtent = function(extent, object) {\n    return fitExtent(projection, extent, object);\n  };\n\n  projection.fitSize = function(size, object) {\n    return fitSize(projection, size, object);\n  };\n\n  function recenter() {\n    projectRotate = compose(rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma), project);\n    var center = project(lambda, phi);\n    dx = x - center[0] * k;\n    dy = y + center[1] * k;\n    return reset();\n  }\n\n  function reset() {\n    cache = cacheStream = null;\n    return projection;\n  }\n\n  return function() {\n    project = projectAt.apply(this, arguments);\n    projection.invert = project.invert && invert;\n    return recenter();\n  };\n}\n\nfunction conicProjection(projectAt) {\n  var phi0 = 0,\n      phi1 = pi$4 / 3,\n      m = projectionMutator(projectAt),\n      p = m(phi0, phi1);\n\n  p.parallels = function(_) {\n    return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees$1, phi1 * degrees$1];\n  };\n\n  return p;\n}\n\nfunction cylindricalEqualAreaRaw(phi0) {\n  var cosPhi0 = cos$1(phi0);\n\n  function forward(lambda, phi) {\n    return [lambda * cosPhi0, sin$1(phi) / cosPhi0];\n  }\n\n  forward.invert = function(x, y) {\n    return [x / cosPhi0, asin$1(y * cosPhi0)];\n  };\n\n  return forward;\n}\n\nfunction conicEqualAreaRaw(y0, y1) {\n  var sy0 = sin$1(y0), n = (sy0 + sin$1(y1)) / 2;\n\n  // Are the parallels symmetrical around the Equator?\n  if (abs(n) < epsilon$4) return cylindricalEqualAreaRaw(y0);\n\n  var c = 1 + sy0 * (2 * n - sy0), r0 = sqrt$1(c) / n;\n\n  function project(x, y) {\n    var r = sqrt$1(c - 2 * n * sin$1(y)) / n;\n    return [r * sin$1(x *= n), r0 - r * cos$1(x)];\n  }\n\n  project.invert = function(x, y) {\n    var r0y = r0 - y;\n    return [atan2(x, abs(r0y)) / n * sign$1(r0y), asin$1((c - (x * x + r0y * r0y) * n * n) / (2 * n))];\n  };\n\n  return project;\n}\n\nvar conicEqualArea = function() {\n  return conicProjection(conicEqualAreaRaw)\n      .scale(155.424)\n      .center([0, 33.6442]);\n};\n\nvar albers = function() {\n  return conicEqualArea()\n      .parallels([29.5, 45.5])\n      .scale(1070)\n      .translate([480, 250])\n      .rotate([96, 0])\n      .center([-0.6, 38.7]);\n};\n\n// The projections must have mutually exclusive clip regions on the sphere,\n// as this will avoid emitting interleaving lines and polygons.\nfunction multiplex(streams) {\n  var n = streams.length;\n  return {\n    point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },\n    sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },\n    lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },\n    lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },\n    polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },\n    polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }\n  };\n}\n\n// A composite projection for the United States, configured by default for\n// 960×500. The projection also works quite well at 960×600 if you change the\n// scale to 1285 and adjust the translate accordingly. The set of standard\n// parallels for each region comes from USGS, which is published here:\n// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers\nvar albersUsa = function() {\n  var cache,\n      cacheStream,\n      lower48 = albers(), lower48Point,\n      alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338\n      hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007\n      point, pointStream = {point: function(x, y) { point = [x, y]; }};\n\n  function albersUsa(coordinates) {\n    var x = coordinates[0], y = coordinates[1];\n    return point = null,\n        (lower48Point.point(x, y), point)\n        || (alaskaPoint.point(x, y), point)\n        || (hawaiiPoint.point(x, y), point);\n  }\n\n  albersUsa.invert = function(coordinates) {\n    var k = lower48.scale(),\n        t = lower48.translate(),\n        x = (coordinates[0] - t[0]) / k,\n        y = (coordinates[1] - t[1]) / k;\n    return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska\n        : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii\n        : lower48).invert(coordinates);\n  };\n\n  albersUsa.stream = function(stream) {\n    return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);\n  };\n\n  albersUsa.precision = function(_) {\n    if (!arguments.length) return lower48.precision();\n    lower48.precision(_), alaska.precision(_), hawaii.precision(_);\n    return reset();\n  };\n\n  albersUsa.scale = function(_) {\n    if (!arguments.length) return lower48.scale();\n    lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);\n    return albersUsa.translate(lower48.translate());\n  };\n\n  albersUsa.translate = function(_) {\n    if (!arguments.length) return lower48.translate();\n    var k = lower48.scale(), x = +_[0], y = +_[1];\n\n    lower48Point = lower48\n        .translate(_)\n        .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])\n        .stream(pointStream);\n\n    alaskaPoint = alaska\n        .translate([x - 0.307 * k, y + 0.201 * k])\n        .clipExtent([[x - 0.425 * k + epsilon$4, y + 0.120 * k + epsilon$4], [x - 0.214 * k - epsilon$4, y + 0.234 * k - epsilon$4]])\n        .stream(pointStream);\n\n    hawaiiPoint = hawaii\n        .translate([x - 0.205 * k, y + 0.212 * k])\n        .clipExtent([[x - 0.214 * k + epsilon$4, y + 0.166 * k + epsilon$4], [x - 0.115 * k - epsilon$4, y + 0.234 * k - epsilon$4]])\n        .stream(pointStream);\n\n    return reset();\n  };\n\n  albersUsa.fitExtent = function(extent, object) {\n    return fitExtent(albersUsa, extent, object);\n  };\n\n  albersUsa.fitSize = function(size, object) {\n    return fitSize(albersUsa, size, object);\n  };\n\n  function reset() {\n    cache = cacheStream = null;\n    return albersUsa;\n  }\n\n  return albersUsa.scale(1070);\n};\n\nfunction azimuthalRaw(scale) {\n  return function(x, y) {\n    var cx = cos$1(x),\n        cy = cos$1(y),\n        k = scale(cx * cy);\n    return [\n      k * cy * sin$1(x),\n      k * sin$1(y)\n    ];\n  }\n}\n\nfunction azimuthalInvert(angle) {\n  return function(x, y) {\n    var z = sqrt$1(x * x + y * y),\n        c = angle(z),\n        sc = sin$1(c),\n        cc = cos$1(c);\n    return [\n      atan2(x * sc, z * cc),\n      asin$1(z && y * sc / z)\n    ];\n  }\n}\n\nvar azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) {\n  return sqrt$1(2 / (1 + cxcy));\n});\n\nazimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) {\n  return 2 * asin$1(z / 2);\n});\n\nvar azimuthalEqualArea = function() {\n  return projection(azimuthalEqualAreaRaw)\n      .scale(124.75)\n      .clipAngle(180 - 1e-3);\n};\n\nvar azimuthalEquidistantRaw = azimuthalRaw(function(c) {\n  return (c = acos(c)) && c / sin$1(c);\n});\n\nazimuthalEquidistantRaw.invert = azimuthalInvert(function(z) {\n  return z;\n});\n\nvar azimuthalEquidistant = function() {\n  return projection(azimuthalEquidistantRaw)\n      .scale(79.4188)\n      .clipAngle(180 - 1e-3);\n};\n\nfunction mercatorRaw(lambda, phi) {\n  return [lambda, log$1(tan((halfPi$3 + phi) / 2))];\n}\n\nmercatorRaw.invert = function(x, y) {\n  return [x, 2 * atan(exp(y)) - halfPi$3];\n};\n\nvar mercator = function() {\n  return mercatorProjection(mercatorRaw)\n      .scale(961 / tau$4);\n};\n\nfunction mercatorProjection(project) {\n  var m = projection(project),\n      scale = m.scale,\n      translate = m.translate,\n      clipExtent = m.clipExtent,\n      clipAuto;\n\n  m.scale = function(_) {\n    return arguments.length ? (scale(_), clipAuto && m.clipExtent(null), m) : scale();\n  };\n\n  m.translate = function(_) {\n    return arguments.length ? (translate(_), clipAuto && m.clipExtent(null), m) : translate();\n  };\n\n  m.clipExtent = function(_) {\n    if (!arguments.length) return clipAuto ? null : clipExtent();\n    if (clipAuto = _ == null) {\n      var k = pi$4 * scale(),\n          t = translate();\n      _ = [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]];\n    }\n    clipExtent(_);\n    return m;\n  };\n\n  return m.clipExtent(null);\n}\n\nfunction tany(y) {\n  return tan((halfPi$3 + y) / 2);\n}\n\nfunction conicConformalRaw(y0, y1) {\n  var cy0 = cos$1(y0),\n      n = y0 === y1 ? sin$1(y0) : log$1(cy0 / cos$1(y1)) / log$1(tany(y1) / tany(y0)),\n      f = cy0 * pow$1(tany(y0), n) / n;\n\n  if (!n) return mercatorRaw;\n\n  function project(x, y) {\n    if (f > 0) { if (y < -halfPi$3 + epsilon$4) y = -halfPi$3 + epsilon$4; }\n    else { if (y > halfPi$3 - epsilon$4) y = halfPi$3 - epsilon$4; }\n    var r = f / pow$1(tany(y), n);\n    return [r * sin$1(n * x), f - r * cos$1(n * x)];\n  }\n\n  project.invert = function(x, y) {\n    var fy = f - y, r = sign$1(n) * sqrt$1(x * x + fy * fy);\n    return [atan2(x, abs(fy)) / n * sign$1(fy), 2 * atan(pow$1(f / r, 1 / n)) - halfPi$3];\n  };\n\n  return project;\n}\n\nvar conicConformal = function() {\n  return conicProjection(conicConformalRaw)\n      .scale(109.5)\n      .parallels([30, 30]);\n};\n\nfunction equirectangularRaw(lambda, phi) {\n  return [lambda, phi];\n}\n\nequirectangularRaw.invert = equirectangularRaw;\n\nvar equirectangular = function() {\n  return projection(equirectangularRaw)\n      .scale(152.63);\n};\n\nfunction conicEquidistantRaw(y0, y1) {\n  var cy0 = cos$1(y0),\n      n = y0 === y1 ? sin$1(y0) : (cy0 - cos$1(y1)) / (y1 - y0),\n      g = cy0 / n + y0;\n\n  if (abs(n) < epsilon$4) return equirectangularRaw;\n\n  function project(x, y) {\n    var gy = g - y, nx = n * x;\n    return [gy * sin$1(nx), g - gy * cos$1(nx)];\n  }\n\n  project.invert = function(x, y) {\n    var gy = g - y;\n    return [atan2(x, abs(gy)) / n * sign$1(gy), g - sign$1(n) * sqrt$1(x * x + gy * gy)];\n  };\n\n  return project;\n}\n\nvar conicEquidistant = function() {\n  return conicProjection(conicEquidistantRaw)\n      .scale(131.154)\n      .center([0, 13.9389]);\n};\n\nfunction gnomonicRaw(x, y) {\n  var cy = cos$1(y), k = cos$1(x) * cy;\n  return [cy * sin$1(x) / k, sin$1(y) / k];\n}\n\ngnomonicRaw.invert = azimuthalInvert(atan);\n\nvar gnomonic = function() {\n  return projection(gnomonicRaw)\n      .scale(144.049)\n      .clipAngle(60);\n};\n\nfunction scaleTranslate(kx, ky, tx, ty) {\n  return kx === 1 && ky === 1 && tx === 0 && ty === 0 ? identity$7 : transformer({\n    point: function(x, y) {\n      this.stream.point(x * kx + tx, y * ky + ty);\n    }\n  });\n}\n\nvar identity$8 = function() {\n  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, transform = identity$7, // scale, translate and reflect\n      x0 = null, y0, x1, y1, clip = identity$7, // clip extent\n      cache,\n      cacheStream,\n      projection;\n\n  function reset() {\n    cache = cacheStream = null;\n    return projection;\n  }\n\n  return projection = {\n    stream: function(stream) {\n      return cache && cacheStream === stream ? cache : cache = transform(clip(cacheStream = stream));\n    },\n    clipExtent: function(_) {\n      return arguments.length ? (clip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$7) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];\n    },\n    scale: function(_) {\n      return arguments.length ? (transform = scaleTranslate((k = +_) * sx, k * sy, tx, ty), reset()) : k;\n    },\n    translate: function(_) {\n      return arguments.length ? (transform = scaleTranslate(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty];\n    },\n    reflectX: function(_) {\n      return arguments.length ? (transform = scaleTranslate(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0;\n    },\n    reflectY: function(_) {\n      return arguments.length ? (transform = scaleTranslate(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0;\n    },\n    fitExtent: function(extent, object) {\n      return fitExtent(projection, extent, object);\n    },\n    fitSize: function(size, object) {\n      return fitSize(projection, size, object);\n    }\n  };\n};\n\nfunction orthographicRaw(x, y) {\n  return [cos$1(y) * sin$1(x), sin$1(y)];\n}\n\northographicRaw.invert = azimuthalInvert(asin$1);\n\nvar orthographic = function() {\n  return projection(orthographicRaw)\n      .scale(249.5)\n      .clipAngle(90 + epsilon$4);\n};\n\nfunction stereographicRaw(x, y) {\n  var cy = cos$1(y), k = 1 + cos$1(x) * cy;\n  return [cy * sin$1(x) / k, sin$1(y) / k];\n}\n\nstereographicRaw.invert = azimuthalInvert(function(z) {\n  return 2 * atan(z);\n});\n\nvar stereographic = function() {\n  return projection(stereographicRaw)\n      .scale(250)\n      .clipAngle(142);\n};\n\nfunction transverseMercatorRaw(lambda, phi) {\n  return [log$1(tan((halfPi$3 + phi) / 2)), -lambda];\n}\n\ntransverseMercatorRaw.invert = function(x, y) {\n  return [-y, 2 * atan(exp(x)) - halfPi$3];\n};\n\nvar transverseMercator = function() {\n  var m = mercatorProjection(transverseMercatorRaw),\n      center = m.center,\n      rotate = m.rotate;\n\n  m.center = function(_) {\n    return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);\n  };\n\n  m.rotate = function(_) {\n    return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);\n  };\n\n  return rotate([0, 0, 90])\n      .scale(159.155);\n};\n\nexports.version = version;\nexports.bisect = bisectRight;\nexports.bisectRight = bisectRight;\nexports.bisectLeft = bisectLeft;\nexports.ascending = ascending;\nexports.bisector = bisector;\nexports.descending = descending;\nexports.deviation = deviation;\nexports.extent = extent;\nexports.histogram = histogram;\nexports.thresholdFreedmanDiaconis = freedmanDiaconis;\nexports.thresholdScott = scott;\nexports.thresholdSturges = sturges;\nexports.max = max;\nexports.mean = mean;\nexports.median = median;\nexports.merge = merge;\nexports.min = min;\nexports.pairs = pairs;\nexports.permute = permute;\nexports.quantile = threshold;\nexports.range = range;\nexports.scan = scan;\nexports.shuffle = shuffle;\nexports.sum = sum;\nexports.ticks = ticks;\nexports.tickStep = tickStep;\nexports.transpose = transpose;\nexports.variance = variance;\nexports.zip = zip;\nexports.entries = entries;\nexports.keys = keys;\nexports.values = values;\nexports.map = map$1;\nexports.set = set;\nexports.nest = nest;\nexports.randomUniform = uniform;\nexports.randomNormal = normal;\nexports.randomLogNormal = logNormal;\nexports.randomBates = bates;\nexports.randomIrwinHall = irwinHall;\nexports.randomExponential = exponential;\nexports.easeLinear = linear;\nexports.easeQuad = quadInOut;\nexports.easeQuadIn = quadIn;\nexports.easeQuadOut = quadOut;\nexports.easeQuadInOut = quadInOut;\nexports.easeCubic = cubicInOut;\nexports.easeCubicIn = cubicIn;\nexports.easeCubicOut = cubicOut;\nexports.easeCubicInOut = cubicInOut;\nexports.easePoly = polyInOut;\nexports.easePolyIn = polyIn;\nexports.easePolyOut = polyOut;\nexports.easePolyInOut = polyInOut;\nexports.easeSin = sinInOut;\nexports.easeSinIn = sinIn;\nexports.easeSinOut = sinOut;\nexports.easeSinInOut = sinInOut;\nexports.easeExp = expInOut;\nexports.easeExpIn = expIn;\nexports.easeExpOut = expOut;\nexports.easeExpInOut = expInOut;\nexports.easeCircle = circleInOut;\nexports.easeCircleIn = circleIn;\nexports.easeCircleOut = circleOut;\nexports.easeCircleInOut = circleInOut;\nexports.easeBounce = bounceOut;\nexports.easeBounceIn = bounceIn;\nexports.easeBounceOut = bounceOut;\nexports.easeBounceInOut = bounceInOut;\nexports.easeBack = backInOut;\nexports.easeBackIn = backIn;\nexports.easeBackOut = backOut;\nexports.easeBackInOut = backInOut;\nexports.easeElastic = elasticOut;\nexports.easeElasticIn = elasticIn;\nexports.easeElasticOut = elasticOut;\nexports.easeElasticInOut = elasticInOut;\nexports.polygonArea = area;\nexports.polygonCentroid = centroid;\nexports.polygonHull = hull;\nexports.polygonContains = contains;\nexports.polygonLength = length$1;\nexports.path = path;\nexports.quadtree = quadtree;\nexports.queue = queue;\nexports.arc = arc;\nexports.area = area$1;\nexports.line = line;\nexports.pie = pie;\nexports.radialArea = radialArea;\nexports.radialLine = radialLine$1;\nexports.symbol = symbol;\nexports.symbols = symbols;\nexports.symbolCircle = circle;\nexports.symbolCross = cross$1;\nexports.symbolDiamond = diamond;\nexports.symbolSquare = square;\nexports.symbolStar = star;\nexports.symbolTriangle = triangle;\nexports.symbolWye = wye;\nexports.curveBasisClosed = basisClosed;\nexports.curveBasisOpen = basisOpen;\nexports.curveBasis = basis;\nexports.curveBundle = bundle;\nexports.curveCardinalClosed = cardinalClosed;\nexports.curveCardinalOpen = cardinalOpen;\nexports.curveCardinal = cardinal;\nexports.curveCatmullRomClosed = catmullRomClosed;\nexports.curveCatmullRomOpen = catmullRomOpen;\nexports.curveCatmullRom = catmullRom;\nexports.curveLinearClosed = linearClosed;\nexports.curveLinear = curveLinear;\nexports.curveMonotoneX = monotoneX;\nexports.curveMonotoneY = monotoneY;\nexports.curveNatural = natural;\nexports.curveStep = step;\nexports.curveStepAfter = stepAfter;\nexports.curveStepBefore = stepBefore;\nexports.stack = stack;\nexports.stackOffsetExpand = expand;\nexports.stackOffsetNone = none;\nexports.stackOffsetSilhouette = silhouette;\nexports.stackOffsetWiggle = wiggle;\nexports.stackOrderAscending = ascending$1;\nexports.stackOrderDescending = descending$2;\nexports.stackOrderInsideOut = insideOut;\nexports.stackOrderNone = none$1;\nexports.stackOrderReverse = reverse;\nexports.color = color;\nexports.rgb = rgb;\nexports.hsl = hsl;\nexports.lab = lab;\nexports.hcl = hcl;\nexports.cubehelix = cubehelix;\nexports.interpolate = interpolate;\nexports.interpolateArray = array$1;\nexports.interpolateDate = date;\nexports.interpolateNumber = interpolateNumber;\nexports.interpolateObject = object;\nexports.interpolateRound = interpolateRound;\nexports.interpolateString = interpolateString;\nexports.interpolateTransformCss = interpolateTransformCss;\nexports.interpolateTransformSvg = interpolateTransformSvg;\nexports.interpolateZoom = interpolateZoom;\nexports.interpolateRgb = interpolateRgb;\nexports.interpolateRgbBasis = rgbBasis;\nexports.interpolateRgbBasisClosed = rgbBasisClosed;\nexports.interpolateHsl = hsl$2;\nexports.interpolateHslLong = hslLong;\nexports.interpolateLab = lab$1;\nexports.interpolateHcl = hcl$2;\nexports.interpolateHclLong = hclLong;\nexports.interpolateCubehelix = cubehelix$2;\nexports.interpolateCubehelixLong = cubehelixLong;\nexports.interpolateBasis = basis$2;\nexports.interpolateBasisClosed = basisClosed$1;\nexports.quantize = quantize;\nexports.dispatch = dispatch;\nexports.dsvFormat = dsv;\nexports.csvParse = csvParse;\nexports.csvParseRows = csvParseRows;\nexports.csvFormat = csvFormat;\nexports.csvFormatRows = csvFormatRows;\nexports.tsvParse = tsvParse;\nexports.tsvParseRows = tsvParseRows;\nexports.tsvFormat = tsvFormat;\nexports.tsvFormatRows = tsvFormatRows;\nexports.request = request;\nexports.html = html;\nexports.json = json;\nexports.text = text;\nexports.xml = xml;\nexports.csv = csv$1;\nexports.tsv = tsv$1;\nexports.now = now;\nexports.timer = timer;\nexports.timerFlush = timerFlush;\nexports.timeout = timeout$1;\nexports.interval = interval$1;\nexports.timeInterval = newInterval;\nexports.timeMillisecond = millisecond;\nexports.timeMilliseconds = milliseconds;\nexports.timeSecond = second;\nexports.timeSeconds = seconds;\nexports.timeMinute = minute;\nexports.timeMinutes = minutes;\nexports.timeHour = hour;\nexports.timeHours = hours;\nexports.timeDay = day;\nexports.timeDays = days;\nexports.timeWeek = sunday;\nexports.timeWeeks = sundays;\nexports.timeSunday = sunday;\nexports.timeSundays = sundays;\nexports.timeMonday = monday;\nexports.timeMondays = mondays;\nexports.timeTuesday = tuesday;\nexports.timeTuesdays = tuesdays;\nexports.timeWednesday = wednesday;\nexports.timeWednesdays = wednesdays;\nexports.timeThursday = thursday;\nexports.timeThursdays = thursdays;\nexports.timeFriday = friday;\nexports.timeFridays = fridays;\nexports.timeSaturday = saturday;\nexports.timeSaturdays = saturdays;\nexports.timeMonth = month;\nexports.timeMonths = months;\nexports.timeYear = year;\nexports.timeYears = years;\nexports.utcMillisecond = millisecond;\nexports.utcMilliseconds = milliseconds;\nexports.utcSecond = second;\nexports.utcSeconds = seconds;\nexports.utcMinute = utcMinute;\nexports.utcMinutes = utcMinutes;\nexports.utcHour = utcHour;\nexports.utcHours = utcHours;\nexports.utcDay = utcDay;\nexports.utcDays = utcDays;\nexports.utcWeek = utcSunday;\nexports.utcWeeks = utcSundays;\nexports.utcSunday = utcSunday;\nexports.utcSundays = utcSundays;\nexports.utcMonday = utcMonday;\nexports.utcMondays = utcMondays;\nexports.utcTuesday = utcTuesday;\nexports.utcTuesdays = utcTuesdays;\nexports.utcWednesday = utcWednesday;\nexports.utcWednesdays = utcWednesdays;\nexports.utcThursday = utcThursday;\nexports.utcThursdays = utcThursdays;\nexports.utcFriday = utcFriday;\nexports.utcFridays = utcFridays;\nexports.utcSaturday = utcSaturday;\nexports.utcSaturdays = utcSaturdays;\nexports.utcMonth = utcMonth;\nexports.utcMonths = utcMonths;\nexports.utcYear = utcYear;\nexports.utcYears = utcYears;\nexports.formatLocale = formatLocale;\nexports.formatDefaultLocale = defaultLocale;\nexports.formatSpecifier = formatSpecifier;\nexports.precisionFixed = precisionFixed;\nexports.precisionPrefix = precisionPrefix;\nexports.precisionRound = precisionRound;\nexports.isoFormat = formatIso;\nexports.isoParse = parseIso;\nexports.timeFormatLocale = formatLocale$1;\nexports.timeFormatDefaultLocale = defaultLocale$1;\nexports.scaleBand = band;\nexports.scalePoint = point$4;\nexports.scaleIdentity = identity$4;\nexports.scaleLinear = linear$2;\nexports.scaleLog = log;\nexports.scaleOrdinal = ordinal;\nexports.scaleImplicit = implicit;\nexports.scalePow = pow;\nexports.scaleSqrt = sqrt;\nexports.scaleQuantile = quantile$$1;\nexports.scaleQuantize = quantize$1;\nexports.scaleThreshold = threshold$1;\nexports.scaleTime = time;\nexports.scaleUtc = utcTime;\nexports.schemeCategory10 = category10;\nexports.schemeCategory20b = category20b;\nexports.schemeCategory20c = category20c;\nexports.schemeCategory20 = category20;\nexports.scaleSequential = sequential;\nexports.interpolateCubehelixDefault = cubehelix$3;\nexports.interpolateRainbow = rainbow$1;\nexports.interpolateWarm = warm;\nexports.interpolateCool = cool;\nexports.interpolateViridis = viridis;\nexports.interpolateMagma = magma;\nexports.interpolateInferno = inferno;\nexports.interpolatePlasma = plasma;\nexports.creator = creator;\nexports.customEvent = customEvent;\nexports.local = local;\nexports.matcher = matcher$1;\nexports.mouse = mouse;\nexports.namespace = namespace;\nexports.namespaces = namespaces;\nexports.select = select;\nexports.selectAll = selectAll;\nexports.selection = selection;\nexports.selector = selector;\nexports.selectorAll = selectorAll;\nexports.touch = touch;\nexports.touches = touches;\nexports.window = window;\nexports.active = active;\nexports.interrupt = interrupt;\nexports.transition = transition;\nexports.axisTop = axisTop;\nexports.axisRight = axisRight;\nexports.axisBottom = axisBottom;\nexports.axisLeft = axisLeft;\nexports.cluster = cluster;\nexports.hierarchy = hierarchy;\nexports.pack = index;\nexports.packSiblings = siblings;\nexports.packEnclose = enclose;\nexports.partition = partition;\nexports.stratify = stratify;\nexports.tree = tree;\nexports.treemap = index$1;\nexports.treemapBinary = binary;\nexports.treemapDice = treemapDice;\nexports.treemapSlice = treemapSlice;\nexports.treemapSliceDice = sliceDice;\nexports.treemapSquarify = squarify;\nexports.treemapResquarify = resquarify;\nexports.forceCenter = center$1;\nexports.forceCollide = collide;\nexports.forceLink = link;\nexports.forceManyBody = manyBody;\nexports.forceSimulation = simulation;\nexports.forceX = x$3;\nexports.forceY = y$3;\nexports.drag = drag;\nexports.dragDisable = dragDisable;\nexports.dragEnable = yesdrag;\nexports.voronoi = voronoi;\nexports.zoom = zoom;\nexports.zoomIdentity = identity$6;\nexports.zoomTransform = transform;\nexports.brush = brush;\nexports.brushX = brushX;\nexports.brushY = brushY;\nexports.brushSelection = brushSelection;\nexports.chord = chord;\nexports.ribbon = ribbon;\nexports.geoAlbers = albers;\nexports.geoAlbersUsa = albersUsa;\nexports.geoArea = area$2;\nexports.geoAzimuthalEqualArea = azimuthalEqualArea;\nexports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;\nexports.geoAzimuthalEquidistant = azimuthalEquidistant;\nexports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;\nexports.geoBounds = bounds;\nexports.geoCentroid = centroid$1;\nexports.geoCircle = circle$1;\nexports.geoClipExtent = extent$1;\nexports.geoConicConformal = conicConformal;\nexports.geoConicConformalRaw = conicConformalRaw;\nexports.geoConicEqualArea = conicEqualArea;\nexports.geoConicEqualAreaRaw = conicEqualAreaRaw;\nexports.geoConicEquidistant = conicEquidistant;\nexports.geoConicEquidistantRaw = conicEquidistantRaw;\nexports.geoDistance = distance;\nexports.geoEquirectangular = equirectangular;\nexports.geoEquirectangularRaw = equirectangularRaw;\nexports.geoGnomonic = gnomonic;\nexports.geoGnomonicRaw = gnomonicRaw;\nexports.geoGraticule = graticule;\nexports.geoGraticule10 = graticule10;\nexports.geoIdentity = identity$8;\nexports.geoInterpolate = interpolate$2;\nexports.geoLength = length$2;\nexports.geoMercator = mercator;\nexports.geoMercatorRaw = mercatorRaw;\nexports.geoOrthographic = orthographic;\nexports.geoOrthographicRaw = orthographicRaw;\nexports.geoPath = index$3;\nexports.geoProjection = projection;\nexports.geoProjectionMutator = projectionMutator;\nexports.geoRotation = rotation;\nexports.geoStereographic = stereographic;\nexports.geoStereographicRaw = stereographicRaw;\nexports.geoStream = geoStream;\nexports.geoTransform = transform$1;\nexports.geoTransverseMercator = transverseMercator;\nexports.geoTransverseMercatorRaw = transverseMercatorRaw;\n\nObject.defineProperty(exports, '__esModule', { value: true });\n\n})));\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  var d3 = require(\"d3\");\r\n  var Chart = require(\"./chart.js\");\r\n\r\n  module.exports = Barchart;\r\n\r\n  // Barchart inherits from Chart\r\n  Barchart.prototype = Object.create(Chart.prototype);\r\n  Barchart.prototype.constructor = Barchart;\r\n\r\n  /**\r\n    * @class Barchart\r\n    * @summary Represent data with a barchart\r\n    * @desc Barcharts are polyvalent charts that should be used most of the time.\r\n    * In a barchart individual value are visually easy to compare because the\r\n    * human eye is good at comparing lengths. Moreover barcharts can represent\r\n    * negative values while polar charts can only represent positive values; \r\n    * @param {string} el CSS selector representing the element that will hold the chart.\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {BarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @typedef {object} BarchartOptions\r\n    * @memberOf Barchart\r\n    * @prop {number|\"auto\"} [minValue=\"auto\"] Minimum value data could take. It\r\n    * is important to set this option explicitely if one wants to compare\r\n    * charts and use the same scale on each one. By default `minValue` equals to 0\r\n    * if all data values are positive or the minimum value if some values are\r\n    * negative.\r\n    * @prop {number|\"auto\"} [maxValue=\"auto\"] Maximum value data could take.It\r\n    * is important to set this option explicitely if one wants to compare\r\n    * charts and use the same scale on each one. By default it equals to 0 if all\r\n    * values are negative or to maximmum value if some value is positive.\r\n    * @prop {number} [width=60] Width of the chart.\r\n    * @prop {number} [height=60] Height of the chart.\r\n    * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds.\r\n    * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of\r\n    * colors or a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value.If it is an array with length less than the length\r\n    * of data, then the colors are recycled.\r\n    * @prop {string[]|\"none\"|\"auto\"|function}[labels=\"none\"] Labels to display in bars.\r\n    * It can be an array with same length as the data. It can also be a function\r\n    * `(d, i) -> labelText` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"none\" to hide labels\r\n    * or \"auto\" to display in a compact way values.\r\n    * @prop {string|string[]|\"auto\"|function}[labelColors=\"auto\"] Color of the labels.\r\n    * It can be a single value or an array with same length as the data. It can\r\n    * also be a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"auto\". In this case,\r\n    * the most readable color is choosen depding on the color of the bar.\r\n    * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is\r\n    * not enough space for a given label, then it is hidden.\r\n    * @prop {number}[labelMaxSize=24] Label maximum size in pixels.\r\n    * @prop {number}[labelPadding=2] Padding to apply to apply to labels.\r\n    * @prop {string}[labelClass=\"\"] Labels CSS class.\r\n    * @prop {string}[shapeClass=\"\"] bars CSS class.\r\n    * @prop {string}[zeroLineStyle=\"stroke:#333;stroke-width:1;\"] CSS style of the\r\n    * line representing the zero value.\r\n    */\r\n\r\n  /** @method setData\r\n    * @desc Update the data represented by the chart\r\n    * @instance\r\n    * @memberOf Barchart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    */\r\n\r\n  /** @method setOptions\r\n    * @desc Update the graphical options of a chart\r\n    * @instance\r\n    * @memberOf Barchart\r\n    * @param {BarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @method update\r\n    * @desc Update simulatenously data and options of a barchart.\r\n    * @instance\r\n    * @memberOf Barchart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {BarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n  function Barchart(el, data, options) {\r\n    // Default options\r\n    var defaults = {\r\n      minValue: \"auto\",\r\n      maxValue: \"auto\",\r\n      zeroLineStyle: \"stroke:#333;stroke-width:1;\"\r\n    };\r\n\r\n    // Call super constructor\r\n    Chart.call(this, el, data, options, defaults);\r\n\r\n    // Initialize the zero line\r\n    var scaleFun = d3.scaleLinear()\r\n      .domain([this._options.minValue, this._options.maxValue])\r\n      .range([this._options.height, 0]);\r\n\r\n    this._zeroLine = this._container.append(\"line\")\r\n      .attr(\"x1\", 0)\r\n      .attr(\"y1\", scaleFun(0))\r\n      .attr(\"x2\", this._options.width)\r\n      .attr(\"y2\", scaleFun(0))\r\n      .attr(\"style\", this._options.zeroLineStyle);\r\n\r\n    this._draw();\r\n  }\r\n\r\n  // See comments in chart.js\r\n  Barchart.prototype._processOptions = function(options) {\r\n    options = Chart.prototype._processOptions.call(this, options, this._options);\r\n\r\n    // Set min value and max value if necessary.\r\n    if (options.minValue === \"auto\") {\r\n      var min = d3.min(this._data);\r\n      var max = options.maxValue === \"auto\"? d3.max(this._data): options.maxValue;\r\n\r\n      if (max > 0 && min > 0) options.minValue = 0;\r\n      else options.minValue = min;\r\n    }\r\n\r\n    if (options.maxValue === \"auto\") {\r\n      var max = options.minValue === \"auto\"? d3.min(this._data): options.minValue;\r\n      var max = d3.max(this._data);\r\n\r\n      if (max < 0 && min < 0) options.maxValue = 0;\r\n      else options.maxValue = max;\r\n    }\r\n\r\n    return options;\r\n  };\r\n\r\n  // See comments in chart.js\r\n  Barchart.prototype._draw = function() {\r\n    var self = this;\r\n    Chart.prototype._draw.call(this);\r\n\r\n    var barWidth = (self._options.width - 6) / self._data.length;\r\n    var scaleFun = d3.scaleLinear()\r\n      .domain([self._options.minValue, self._options.maxValue])\r\n      .range([self._options.height, 0]);\r\n\r\n    // Update the zero line\r\n    self._zeroLine\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attr(\"x1\", 0)\r\n      .attr(\"y1\", scaleFun(0))\r\n      .attr(\"x2\", self._options.width)\r\n      .attr(\"y2\", scaleFun(0))\r\n      .attr(\"style\", self._options.zeroLineStyle);\r\n\r\n    // Update bars\r\n    var bar = self._chart.selectAll(\"path\").data(self._data);\r\n    // Add new bars\r\n    function rectPath(x, y, w, h) {\r\n      return (\"M\" + x + \" \" + y + \"l\" + w + \" 0l0 \" + h + \"l\" + (-w) + \" 0Z\")\r\n    }\r\n\r\n    bar.enter()\r\n      .append(\"path\")\r\n      .attr(\"d\", function(d, i) {return rectPath((i + 1) * barWidth + 3, scaleFun(0), 0, 0)})\r\n    // Update bars\r\n      .merge(bar)\r\n      .attr(\"class\", self._options.shapeClass)\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attr(\"d\", function(d, i) {return rectPath(i * barWidth + 3, scaleFun(0), barWidth, scaleFun(d) - scaleFun(0))})\r\n      .attr(\"fill\", self._options.colorFun);\r\n    // Remove bars\r\n    bar.exit()\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attr(\"x\", function(d, i) {return i * barWidth + 3;})\r\n      .attr(\"y\", 0)\r\n      .attr(\"width\", 0)\r\n      .attr(\"height\", 0)\r\n      .remove();\r\n\r\n    // Add/ update labels\r\n    function initLabel(label, d, i) {\r\n      label.fillRect(\r\n        i * barWidth + 3, scaleFun(0),\r\n        barWidth, 0,\r\n        self._options.labelPadding,\r\n        \"center\", d >= 0? \"top\": \"bottom\",\r\n        0\r\n      );\r\n    }\r\n\r\n    function updateLabel(label, d, i) {\r\n      label.fillRect(\r\n        i * barWidth + 3, d >= 0? scaleFun(d) : scaleFun(0),\r\n        barWidth, Math.abs(scaleFun(d) - scaleFun(0)),\r\n        self._options.labelPadding,\r\n        \"center\", d >= 0? \"top\": \"bottom\",\r\n        self._options.transitionTime);\r\n    }\r\n\r\n    this._drawLabels(initLabel, updateLabel);\r\n  }\r\n\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  var d3 = require(\"d3\");\r\n  var tinycolor = require(\"tinycolor2\");\r\n  var utils = require(\"./utils.js\");\r\n  var Label = require(\"./label.js\")\r\n\r\n  module.exports = Chart;\r\n\r\n  /*  @class Chart\r\n    * Abstract class inherited by other classes\r\n    * @param{string} el\r\n    * @param{number[]} data\r\n    * @param {object} options\r\n    * @param {object} defaults\r\n    *\r\n    */\r\n  function Chart(el, data, options, defaults) {\r\n    this._data = data;\r\n\r\n    // Merge options with default options of this class and of the child class\r\n    /**\r\n    * @prop {number} [height=60] width\r\n    * @prop {number} [width=60] height\r\n    * @prop {number} [transitionTime=750] transitionTime\r\n    * @prop {string[]|function} [colors=d3.schemeCategory10] colors\r\n    * @prop {string[]|\"none\"|\"auto\"|function} [labels=\"none\"] labels\r\n    * @prop {string[]|\"auto\"|function} [labelColors=\"auto\"] labelColors\r\n    * @prop {number} [labelMinSize=8] labelMinSize\r\n    * @prop {number} [labelMaxSize=24] labelMaxSize\r\n    * @prop {number} [labelPadding=2] labelPadding\r\n    * @prop {labelClass} [labelClass=\"\"]labelClass\r\n    * @prop {shapeClass} [shapeClass=\"\"] shapeClass\r\n    */\r\n    this._options = {\r\n      width:60,\r\n      height: 60,\r\n      transitionTime: 750,\r\n      colors: d3.schemeCategory10,\r\n      labels: \"none\",\r\n      labelColors: \"auto\",\r\n      labelMinSize: 8,\r\n      labelMaxSize: 24,\r\n      labelPadding: 2,\r\n      labelClass: \"\",\r\n      shapeClass: \"\"\r\n    };\r\n    this._options = utils.mergeOptions(this._options, defaults || {});\r\n    this._options = this._processOptions(options);\r\n\r\n    // Remove everything in the container and create required elements\r\n    d3.select(el).select(\"*\").remove();\r\n    this._container = d3.select(el).append(\"svg\")\r\n      .attr(\"width\", this._options.width)\r\n      .attr(\"height\", this._options.height);\r\n    this._chart = this._container.append(\"g\");\r\n  }\r\n\r\n  /*  Update data and options of a chart\r\n    *\r\n    */\r\n  Chart.prototype.update = function(data, options) {\r\n    this._data = data;\r\n    this._options = this._processOptions(options);\r\n    this._draw();\r\n  };\r\n\r\n  Chart.prototype.setOptions = function(options) {\r\n    this._options = this._processOptions(options);\r\n    this._draw();\r\n  };\r\n\r\n  Chart.prototype.setData = function(data) {\r\n    this._data = data;\r\n    this._draw();\r\n  };\r\n\r\n  Chart.prototype._draw = function() {\r\n    var self = this;\r\n    // Update container size\r\n    self._container\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attr(\"width\", self._options.width)\r\n      .attr(\"height\", self._options.height);\r\n  };\r\n\r\n  Chart.prototype._processOptions = function(options) {\r\n    options = utils.mergeOptions(options, this._options);\r\n\r\n    // Convert parameters colors, labels and labelColors to functions\r\n    options.colorFun = utils.toFunction(options.colors);\r\n    options.labelClass = utils.toFunction(options.labelClass);\r\n    options.shapeClass = utils.toFunction(options.shapeClass);\r\n\r\n    if (options.labels === \"none\") {\r\n      options.labelText = null;\r\n    } else if (options.labels === \"auto\") {\r\n      options.labelText = utils.prettyNumber;\r\n    }  else {\r\n      options.labelText = utils.toFunction(options.labels);\r\n    }\r\n\r\n    if (options.labelColors === \"auto\") {\r\n      options.labelColorFun = function(d, i) {\r\n        return tinycolor.mostReadable(options.colorFun(d, i), [\"white\", \"black\"])._originalInput\r\n      };\r\n    } else {\r\n      options.labelColorFun = utils.toFunction(options.labelColorFun);\r\n    }\r\n\r\n    return options;\r\n  }\r\n\r\n  Chart.prototype._drawLabels = function(initFun, updateFun) {\r\n    var self = this;\r\n\r\n    if (self._options.labels === \"none\") {\r\n      self._chart.selectAll(\".labels-container\").remove();\r\n      return;\r\n    }\r\n\r\n\r\n    self._labels = self._chart.selectAll(\".labels-container\").data(self._data);\r\n    self._labels.enter()\r\n      .append(\"g\")\r\n      .attr(\"class\", \"labels-container\")\r\n      .each(function(d, i) {\r\n        this._label = new Label(this, self._options.labelStyle, self._options.labelColorFun(d, i),\r\n                                self._options.labelMinSize, self._options.labelMaxSize);\r\n        this._label.updateText(self._options.labelText(d, i))\r\n        initFun(this._label, d, i);\r\n      })\r\n\r\n      .merge(self._labels)\r\n      .each(function(d, i) {\r\n        this._label.updateText(self._options.labelText(d, i));\r\n        this._label._text\r\n          .attr(\"fill\", self._options.labelColorFun(d, i))\r\n          .attr(\"class\", self._options.labelClass(d, i));\r\n        updateFun(this._label, d, i);\r\n      });\r\n\r\n    self._labels.exit().remove();\r\n  }\r\n\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  module.exports.Point = Point;\r\n  module.exports.Line = Line;\r\n  module.exports.intersectionOfTwoLines = intersectionOfTwoLines;\r\n  module.exports.intersectionLineAndCircle = intersectionLineAndCircle;\r\n  module.exports.pointInSegment = pointInSegment;\r\n  module.exports.intersectionLineRadius  = intersectionLineRadius ;\r\n  module.exports.distance = distance;\r\n\r\n  function Point(x, y) {\r\n    this.x = x;\r\n    this.y = y;\r\n  }\r\n\r\n  function Line(a, b) {\r\n    this.a = a;\r\n    this.b = b\r\n  }\r\n  Line.prototype.getY = function(x) {\r\n    return this.a + this.b * x;\r\n  }\r\n\r\n  function intersectionOfTwoLines(l1, l2) {\r\n    if (l1.b == l2.b) return []\r\n    return [new Point(\r\n      (l2.a - l1.a) / (l1.b - l2.b),\r\n      (l1.b * l2.a - l1.a * l2.b) / (l1.b - l2.b)\r\n    )]\r\n  }\r\n\r\n  function intersectionLineRadius(l, angle, radius) {\r\n    var l2 = new Line(0, Math.tan(angle));\r\n    var intersect = intersectionOfTwoLines(l, l2);\r\n    var s1 = new Point(0, 0);\r\n    var s2 = new Point(radius * Math.cos(angle), radius * Math.sin(angle));\r\n\r\n    if (intersect.length == 0 || !pointInSegment(intersect[0], s1, s2)) {\r\n      return [];\r\n    } else {\r\n      return intersect;\r\n    }\r\n  }\r\n\r\n  function intersectionLineAndCircle(l, r) {\r\n    var x = solveEqSecondDegree(l.b * l.b + 1, 2 * l.a * l.b, l.a * l.a - r * r);\r\n    return x.map(function(x) {return new Point(x, l.getY(x))});\r\n  }\r\n\r\n  // Is point p inside the segment defined by s1 and s2. It is assumed that the\r\n  // three points are aligned.\r\n  function pointInSegment(p, s1, s2) {\r\n    var kp = dotProd(pointDiff(s2, s1), pointDiff(p, s1));\r\n    var ks = dotProd(pointDiff(s2, s1), pointDiff(s2, s1));\r\n    return kp >= 0 && kp <= ks;\r\n  }\r\n\r\n  function pointDiff(p1, p2) {\r\n    return new Point(p1.x - p2.x, p1.y - p2.y);\r\n  }\r\n\r\n  function dotProd(p1, p2) {\r\n    return p1.x * p2.x + p1.y * p2.y;\r\n  }\r\n\r\n  function solveEqSecondDegree(a, b, c) {\r\n    var det = b * b - 4 * a * c\r\n    if (det < 0) return [];\r\n    if (det == 0) return [(- b) / (2 * a)];\r\n    else return [\r\n      (-b - Math.sqrt(det)) / (2 * a),\r\n      (-b + Math.sqrt(det)) / (2 * a)\r\n    ]\r\n  }\r\n\r\n  function distance(p1, p2) {\r\n    return Math.sqrt( Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2))\r\n  }\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  var d3 = require(\"d3\");\r\n  var g = require(\"./geometry.js\")\r\n\r\n  module.exports = Label;\r\n\r\n  function Label(el, style, color, minSize, maxSize) {\r\n    this._el = el;\r\n    this._minSize = minSize;\r\n    this._maxSize = maxSize;\r\n    this._container = d3.select(el);\r\n    this._label = this._container.append(\"g\")\r\n      .attr(\"class\", \"label\");\r\n\r\n    this._text = this._label.append(\"text\")\r\n      .attr(\"dy\", \"0.35em\")\r\n      .attr(\"text-anchor\", \"middle\")\r\n      .attr(\"style\", style || \"\")\r\n      .attr(\"fill\", color || \"black\");\r\n  }\r\n\r\n  // Size of the label before scaling\r\n  Label.prototype.innerSize = function() {\r\n    return this._text.node().getBBox();\r\n  }\r\n\r\n  Label.prototype.size = function() {\r\n    var bbox = this.innerSize();\r\n    return {\r\n      width: bbox.width * this._scale,\r\n      height: bbox.height * this._scale\r\n    }\r\n  }\r\n\r\n  Label.prototype.updateText = function(newText) {\r\n    // New label should fit in the old bounding bbox\r\n    var oldSize = this.size();\r\n    this._text.text(newText);\r\n    var newSize = this.size();\r\n\r\n    var scale = Math.min(\r\n      oldSize.width / newSize.width,\r\n      oldSize.height / newSize.height\r\n    );\r\n    this.updateScale(this._scale * scale, 0);\r\n    return this;\r\n  }\r\n\r\n  Label.prototype.updatePosition = function(x, y, transitionTime) {\r\n    this._container\r\n      .transition()\r\n      .duration(transitionTime || 0)\r\n      .attr(\"transform\", \"translate(\" + x + \",\" + y + \")\");\r\n      return this;\r\n  }\r\n\r\n  Label.prototype.updateScale = function(newScale, transitionTime) {\r\n    if (!newScale || isNaN(newScale) || !isFinite(newScale)) {\r\n      newScale = 0;\r\n    }\r\n    var newHeight = this.innerSize().height * newScale;\r\n    if (this._minSize && newHeight < this._minSize) {\r\n      newScale = 0;\r\n    }\r\n    if (this._maxSize && newHeight > this._maxSize) {\r\n      newScale = this._maxSize / this.innerSize().height;\r\n    }\r\n    this._label\r\n      .transition()\r\n      .duration(transitionTime || 0)\r\n      .attr(\"transform\", \"scale(\" + newScale + \")\");\r\n    this._scale = newScale;\r\n\r\n    return this;\r\n  }\r\n\r\n  Label.prototype.fillRect = function(x, y, width, height, padding,\r\n                                      hAlign, vAlign,\r\n                                      transitionTime) {\r\n      var bbox = this.innerSize();\r\n      this.updateScale(Math.min(\r\n        (width - 2 * padding) / bbox.width,\r\n        (Math.abs(height)) / bbox.height\r\n      ), transitionTime);\r\n\r\n      var lsize = this.size();\r\n      var lx, ly;\r\n      switch(vAlign) {\r\n        case \"top\":\r\n          ly = y + lsize.height / 2;\r\n          break;\r\n        case \"center\":\r\n          ly = y + (height) / 2;\r\n          break;\r\n        case \"bottom\":\r\n          ly = y + height - lsize.height / 2;\r\n      }\r\n\r\n      switch(hAlign) {\r\n        case \"left\":\r\n          lx = x + padding + lsize.width / 2;\r\n          break;\r\n        case \"center\":\r\n          lx = x + width / 2;\r\n          break;\r\n        case \"right\":\r\n          lx = x + width - padding - lsize.width / 2;\r\n      }\r\n\r\n      this.updatePosition(lx, ly, transitionTime);\r\n\r\n    return this;\r\n  }\r\n\r\n  Label.prototype.fillCircle = function(radius, transitionTime) {\r\n    this.updatePosition(0, 0, transitionTime);\r\n\r\n    var bbox = this.innerSize();\r\n    var ratio = bbox.height / bbox.width;\r\n\r\n    var maxHeight = radius * 2 * Math.cos(Math.PI/2 - Math.atan(ratio))\r\n    this.updateScale(maxHeight / bbox.height, transitionTime);\r\n  }\r\n\r\n  Label.prototype.fillSlice = function(arc, radius, d, transitionTime) {\r\n    var c = arc.centroid(d);\r\n    this.updatePosition(c[0], c[1], transitionTime);\r\n\r\n    var bbox = this.innerSize();\r\n    var ratio = bbox.height / bbox.width;\r\n\r\n    // Get maximal scale so that label fits in the slice.\r\n    var diag1 = new g.Line(c[1] - ratio * c[0], ratio);\r\n    var diag2 = new g.Line(c[1] + ratio * c[0], -ratio);\r\n    var limit1 = new g.Line(0, Math.tan(d.startAngle + Math.PI/2));\r\n    var limit2 = new g.Line(0, Math.tan(d.endAngle + Math.PI/2));\r\n\r\n    // Get all intersection points\r\n    var intersects = [];\r\n    intersects = intersects.concat(g.intersectionLineRadius(diag1, d.startAngle - Math.PI/2, radius));\r\n    intersects = intersects.concat(g.intersectionLineRadius(diag1, d.endAngle - Math.PI/2, radius));\r\n    intersects = intersects.concat(g.intersectionLineAndCircle(diag1, radius));\r\n    intersects = intersects.concat(g.intersectionLineRadius(diag2, d.startAngle - Math.PI/2, radius));\r\n    intersects = intersects.concat(g.intersectionLineRadius(diag2, d.endAngle - Math.PI/2, radius));\r\n    intersects = intersects.concat(g.intersectionLineAndCircle(diag2, radius));\r\n\r\n    // Compute distance between all these points and take the minimum\r\n    var center = new g.Point(c[0], c[1]);\r\n    var distances = intersects.map(function(x) {return g.distance(center, x)});\r\n    var minDist = d3.min(distances);\r\n    var actualDist = Math.sqrt( Math.pow(bbox.height / 2, 2) + Math.pow(bbox.width / 2, 2));\r\n\r\n    this.updateScale(minDist / actualDist, transitionTime);\r\n  }\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  module.exports.Barchart = require(\"./barchart.js\");\r\n  module.exports.Polarchart = require(\"./polarchart.js\");\r\n  module.exports.Piechart = require(\"./piechart.js\");\r\n\r\n  if (window) window.minicharts = module.exports;\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n  var Polarchart = require(\"./polarchart.js\");\r\n  module.exports = Piechart;\r\n\r\n  Piechart.prototype = Object.create(Polarchart.prototype);\r\n  Piechart.prototype.constructor = Piechart;\r\n\r\n  /**\r\n    * @class Piechart\r\n    * @summary Represent data with a pie chart\r\n    * @desc A pie chart is a special case of polar chart where the data values\r\n    * are represented by the angle of the slices. They should only be used to\r\n    * compare qualitatively proportions and compositions. Indeed, human eye is\r\n    * not good at comparing angles so only large differences are visible.\r\n    * @param {string} el CSS selector representing the element that will hold the chart.\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {PiechartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @typedef {object} PiechartOptions\r\n    * @memberOf Piechart\r\n    * @prop {number} [width=60] Width of the chart.\r\n    * @prop {number} [height=60] Height of the chart.\r\n    * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds.\r\n    * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of\r\n    * colors or a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value.If it is an array with length less than the length\r\n    * of data, then the colors are recycled.\r\n    * @prop {string[]|\"none\"|\"auto\"|function}[labels=\"none\"] Labels to display in slices.\r\n    * It can be an array with same length as the data. It can also be a function\r\n    * `(d, i) -> labelText` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"none\" to hide labels\r\n    * or \"auto\" to display in a compact way values.\r\n    * @prop {string|string[]|\"auto\"|function}[labelColors=\"auto\"] Color of the labels.\r\n    * It can be a single value or an array with same length as the data. It can\r\n    * also be a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"auto\". In this case,\r\n    * the most readable color is choosen depding on the color of the slice.\r\n    * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is\r\n    * not enough space for a given label, then it is hidden.\r\n    * @prop {number}[labelMaxSize=24] Label maximum size in pixels.\r\n    * @prop {string}[labelClass=\"\"] Labels CSS class.\r\n    * @prop {string}[shapeClass=\"\"] slices CSS class.\r\n    */\r\n\r\n  /** @method setData\r\n    * @desc Update the data represented by the chart\r\n    * @instance\r\n    * @memberOf Piechart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    */\r\n\r\n  /** @method setOptions\r\n    * @desc Update the graphical options of a chart\r\n    * @instance\r\n    * @memberOf Piechart\r\n    * @param {PiechartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @method update\r\n    * @desc Update simulatenously data and options of a pie chart.\r\n    * @instance\r\n    * @memberOf Piechart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {PiechartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n  function Piechart(el, data, options) {\r\n    Polarchart.call(this, el, data, options);\r\n  }\r\n\r\n  Piechart.prototype._processOptions = function(options) {\r\n    options = options || {};\r\n    options.type = \"angle\";\r\n    return Polarchart.prototype._processOptions.call(this, options);\r\n  }\r\n\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  var d3 = require(\"d3\");\r\n  var Chart = require(\"./chart.js\");\r\n\r\n  module.exports = Polarchart;\r\n\r\n  Polarchart.prototype = Object.create(Chart.prototype);\r\n  Polarchart.prototype.constructor = Polarchart;\r\n\r\n  /**\r\n    * @class Polarchart\r\n    * @summary Represent data with a polar chart\r\n    * @desc Polar charts are nice looking charts especially on a map,\r\n    * but individual values are hard to compare\r\n    * on these charts: the human eye is good to compare lengths, but not\r\n    * to compare agnles, radius or areas. Polar charts should only be used when\r\n    * one wants to point out qualitative results and does not need a precise\r\n    * representation of data. Another limitation compared to barcharts is that\r\n    * polar charts cannot represent negative values.\r\n    * @param {string} el CSS selector representing the element that will hold the chart.\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {PolarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @typedef {object} PolarchartOptions\r\n    * @memberOf Polarchart\r\n    * @prop {number|\"auto\"} [maxValue=\"auto\"] Maximum value data could take.It\r\n    * is important to set this option explicitely if one wants to compare\r\n    * charts and use the same scale on each one. By default it equals to the\r\n    * maximum value of the data.\r\n    * @prop {\"area\"|\"radius\"|\"angle\"} [type=\"area\"] What kind of scale to use to\r\n    * represent the data? `angle` produces a pie chart and should be used only to visualize\r\n    * proportions. In other cases, `area` (the default) should generally be\r\n    * prefered. `radius` should only be used when one wants to magnify differences.\r\n    * @prop {number} [width=60] Width of the chart.\r\n    * @prop {number} [height=60] Height of the chart.\r\n    * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds.\r\n    * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of\r\n    * colors or a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value.If it is an array with length less than the length\r\n    * of data, then the colors are recycled.\r\n    * @prop {string[]|\"none\"|\"auto\"|function}[labels=\"none\"] Labels to display in slices.\r\n    * It can be an array with same length as the data. It can also be a function\r\n    * `(d, i) -> labelText` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"none\" to hide labels\r\n    * or \"auto\" to display in a compact way values.\r\n    * @prop {string|string[]|\"auto\"|function}[labelColors=\"auto\"] Color of the labels.\r\n    * It can be a single value or an array with same length as the data. It can\r\n    * also be a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"auto\". In this case,\r\n    * the most readable color is choosen depding on the color of the slice.\r\n    * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is\r\n    * not enough space for a given label, then it is hidden.\r\n    * @prop {number}[labelMaxSize=24] Label maximum size in pixels.\r\n    * @prop {string}[labelClass=\"\"] Labels CSS class.\r\n    * @prop {string}[shapeClass=\"\"] slices CSS class.\r\n    */\r\n\r\n  /** @method setData\r\n    * @desc Update the data represented by the chart\r\n    * @instance\r\n    * @memberOf Polarchart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    */\r\n\r\n  /** @method setOptions\r\n    * @desc Update the graphical options of a chart\r\n    * @instance\r\n    * @memberOf Polarchart\r\n    * @param {PolarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @method update\r\n    * @desc Update simulatenously data and options of a polar chart.\r\n    * @instance\r\n    * @memberOf Polarchart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {PolarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  function Polarchart(el, data, options) {\r\n    var defaults = {\r\n      type: \"area\",\r\n      maxValue: \"auto\",\r\n    }\r\n\r\n    Chart.call(this, el, data, options, defaults);\r\n\r\n    // Center the chart group inside the container\r\n    this._chart\r\n      .attr(\"transform\", \"translate(\" + this._options.width/2 + \",\" + this._options.width/2 + \")\");\r\n\r\n    this._draw();\r\n  }\r\n\r\n  Polarchart.prototype._processOptions = function(options) {\r\n    options = Chart.prototype._processOptions.call(this, options, this._options);\r\n\r\n    options.height = options.width;\r\n\r\n    if (options.maxValue === \"auto\") {\r\n      options.maxValue = d3.max(this._data);\r\n    }\r\n    //debugger;\r\n    var radius = options.width / 2;\r\n    var pie = d3.pie().sort(null);\r\n    var arc = d3.arc().innerRadius(0);\r\n    var radiusFun;\r\n\r\n    if (options.type === \"angle\") {\r\n      radiusFun = function(d) {return radius}\r\n      pie.value(function(d) {return d});\r\n    } else {\r\n      radiusFun = options.type == \"radius\" ? d3.scaleLinear() : d3.scalePow().exponent(0.5);\r\n      radiusFun.range([0, radius])\r\n        .domain([0, options.maxValue]);\r\n      pie.value(function(d) {return 1});\r\n    }\r\n\r\n    arc.outerRadius(function(d, i) {return radiusFun(d.data)});\r\n\r\n    options.radius = radiusFun;\r\n    options.pie = pie;\r\n    options. arc = arc;\r\n    return options;\r\n  }\r\n\r\n  Polarchart.prototype._draw = function() {\r\n    var self = this;\r\n    Chart.prototype._draw.call(this);\r\n\r\n    // Move center of the chart\r\n    this._chart\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attr(\"transform\", \"translate(\" + self._options.width/2 + \",\" + self._options.width/2 + \")\");\r\n\r\n    var slices = this._chart.selectAll(\"path\").data(this._options.pie(this._data));\r\n\r\n    // Initialize new slices\r\n    slices.enter()\r\n      .append(\"path\")\r\n      .attr(\"class\", \"leaflet-clickable\")\r\n      .attr(\"d\", this._options.arc)\r\n      .attr(\"fill\", function(d, i) {return self._options.colorFun(d, i)})\r\n      .each(function(d, i) {\r\n        if (self._data.length == 1) this._current = {startAngle:d.startAngle, endAngle:d.endAngle, data:0}\r\n        else this._current = {startAngle:d.endAngle, endAngle:d.endAngle}\r\n      })\r\n    // Update slices\r\n      .merge(slices)\r\n      .attr(\"class\", function(d, i) {return self._options.shapeClass(d.data, i)})\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attrTween(\"d\", arcTween)\r\n      .attr(\"fill\", function(d, i) {return self._options.colorFun(d, i)});\r\n    // Remove slices\r\n    slices.exit().remove();\r\n\r\n    function arcTween(a) {\r\n      var i = d3.interpolate(this._current, a);\r\n      this._current = i(0);\r\n      return function(t) {\r\n        return self._options.arc(i(t));\r\n      };\r\n    }\r\n\r\n    // Add/update labels\r\n    // function(arc, radiusFun, d, transitionTime)\r\n    var initLabel, updateLabel;\r\n    if (this._data.length > 1) {\r\n      var data = this._options.pie(this._data);\r\n      initLabel = function(label, d, i) {\r\n        label.fillSlice(self._options.arc, self._options.radius(d), data[i], 0);\r\n      }\r\n\r\n      updateLabel = function(label, d, i) {\r\n        label.fillSlice(self._options.arc, self._options.radius(d), data[i],\r\n                        self._options.transitionTime);\r\n      }\r\n    } else {\r\n      initLabel = function(label, d, i) {\r\n        label.fillCircle(self._options.radius(d), 0);\r\n      }\r\n\r\n      updateLabel = function(label, d, i) {\r\n        label.fillCircle(self._options.radius(d), self._options.transitionTime);\r\n      }\r\n    }\r\n\r\n    this._drawLabels(initLabel, updateLabel);\r\n  }\r\n\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  module.exports.mergeOptions = mergeOptions;\r\n  module.exports.toArray = toArray;\r\n  module.exports.toFunction = toFunction;\r\n  module.exports.prettyNumber = prettyNumber;\r\n\r\n  /** Merge the properties of two objects. More precisely, if a property is\r\n    * present in \"defaults\" but not in \"options\" it is copied in options. this\r\n    * function is used to specified default options for a function.\r\n    *\r\n    * @param {object} options Option object\r\n    * @param {object} defaults Object containing default values of options\r\n    *\r\n    * @return {object} Merged object.\r\n    */\r\n  function mergeOptions(options, defaults) {\r\n    if (options) options = JSON.parse(JSON.stringify(options));\r\n    else options = {};\r\n    defaults = defaults || {};\r\n    for (var opt in defaults) {\r\n      if (defaults.hasOwnProperty(opt) && !options.hasOwnProperty(opt)) {\r\n        options[opt] = defaults[opt];\r\n      }\r\n    }\r\n    return options;\r\n  }\r\n\r\n  /** Converts parameter to Array. Used when user wants to pass a single value,\r\n    * but a function expects an array.\r\n    * @param {any} x An array or a scalar value\r\n    * @return {any[]}\r\n    * 'x' if it is an array, else an array with 'x' as its unique\r\n    * element.\r\n    */\r\n  function toArray(x) {\r\n    if (x.constructor !== Array) x = [x];\r\n    return x;\r\n  }\r\n\r\n  /** Converts its argument in a function.\r\n    * @param {any} x A function, an array, or a scalar.\r\n    * @return {function}\r\n    * - 'x' if it is a function.\r\n    * - If 'x' is a scalar, it returns a function that always returns 'x'\r\n    * - If 'x' is an array it returns the function (d, i) -> x[i]\r\n    */\r\n  function toFunction(x) {\r\n    if (typeof x === \"function\") return (x);\r\n    x = toArray(x);\r\n    return function(d, i) {return x[i % x.length]};\r\n  }\r\n\r\n  /** Transforms a number in a pretty and small string\r\n    * @param {number} number\r\n    * @return {string}\r\n    * A string representing the number. It only keeps at most 2 decimal\r\n    * digits and it adds suffixes \"K\", \"M\", \"B\", \"T\" for large values.\r\n    */\r\n  function prettyNumber(number) {\r\n    if (isNaN(number) || !isFinite(number)) return \"\";\r\n\r\n    var absVal = Math.abs(number);\r\n    var sign= number < 0? \"-\": \"\";\r\n    var scale;\r\n\r\n    if( absVal < 1000 ) {\r\n        scale = '';\r\n    } else if( absVal < 1000000 ) {\r\n        scale = 'K';\r\n        absVal = absVal/1000;\r\n\r\n    } else if( absVal < 1000000000 ) {\r\n        scale = 'M';\r\n        absVal = absVal/1000000;\r\n\r\n    } else if( absVal < 1000000000000 ) {\r\n        scale = 'B';\r\n        absVal = absVal/1000000000;\r\n\r\n    } else if( absVal < 1000000000000000 ) {\r\n        scale = 'T';\r\n        absVal = absVal/1000000000000;\r\n    }\r\n\r\n    if (absVal > 10) absVal = roundTo(absVal);\r\n    else if (absVal > 1) absVal = roundTo(absVal, 10, true);\r\n    else absVal = roundTo(absVal, 100, true);\r\n\r\n    return sign + absVal + scale;\r\n  }\r\n\r\n  /** Round a number\r\n    * @param {number} number\r\n    * @param {number} to: desired precision\r\n    * @param {boolean} inverse If true, number is rounded at the 1 / 'to'\r\n    */\r\n  function roundTo(number, to, inverse) {\r\n    to = to || 1;\r\n    if (inverse) return Math.round(number * to) / to;\r\n    else return Math.round(number / to) * to;\r\n  }\r\n}());\r\n","// TinyColor v1.4.1\n// https://github.com/bgrins/TinyColor\n// Brian Grinstead, MIT License\n\n(function(Math) {\n\nvar trimLeft = /^\\s+/,\n    trimRight = /\\s+$/,\n    tinyCounter = 0,\n    mathRound = Math.round,\n    mathMin = Math.min,\n    mathMax = Math.max,\n    mathRandom = Math.random;\n\nfunction tinycolor (color, opts) {\n\n    color = (color) ? color : '';\n    opts = opts || { };\n\n    // If input is already a tinycolor, return itself\n    if (color instanceof tinycolor) {\n       return color;\n    }\n    // If we are called as a function, call using new instead\n    if (!(this instanceof tinycolor)) {\n        return new tinycolor(color, opts);\n    }\n\n    var rgb = inputToRGB(color);\n    this._originalInput = color,\n    this._r = rgb.r,\n    this._g = rgb.g,\n    this._b = rgb.b,\n    this._a = rgb.a,\n    this._roundA = mathRound(100*this._a) / 100,\n    this._format = opts.format || rgb.format;\n    this._gradientType = opts.gradientType;\n\n    // Don't let the range of [0,255] come back in [0,1].\n    // Potentially lose a little bit of precision here, but will fix issues where\n    // .5 gets interpreted as half of the total, instead of half of 1\n    // If it was supposed to be 128, this was already taken care of by `inputToRgb`\n    if (this._r < 1) { this._r = mathRound(this._r); }\n    if (this._g < 1) { this._g = mathRound(this._g); }\n    if (this._b < 1) { this._b = mathRound(this._b); }\n\n    this._ok = rgb.ok;\n    this._tc_id = tinyCounter++;\n}\n\ntinycolor.prototype = {\n    isDark: function() {\n        return this.getBrightness() < 128;\n    },\n    isLight: function() {\n        return !this.isDark();\n    },\n    isValid: function() {\n        return this._ok;\n    },\n    getOriginalInput: function() {\n      return this._originalInput;\n    },\n    getFormat: function() {\n        return this._format;\n    },\n    getAlpha: function() {\n        return this._a;\n    },\n    getBrightness: function() {\n        //http://www.w3.org/TR/AERT#color-contrast\n        var rgb = this.toRgb();\n        return (rgb.r * 299 + rgb.g * 587 + rgb.b * 114) / 1000;\n    },\n    getLuminance: function() {\n        //http://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef\n        var rgb = this.toRgb();\n        var RsRGB, GsRGB, BsRGB, R, G, B;\n        RsRGB = rgb.r/255;\n        GsRGB = rgb.g/255;\n        BsRGB = rgb.b/255;\n\n        if (RsRGB <= 0.03928) {R = RsRGB / 12.92;} else {R = Math.pow(((RsRGB + 0.055) / 1.055), 2.4);}\n        if (GsRGB <= 0.03928) {G = GsRGB / 12.92;} else {G = Math.pow(((GsRGB + 0.055) / 1.055), 2.4);}\n        if (BsRGB <= 0.03928) {B = BsRGB / 12.92;} else {B = Math.pow(((BsRGB + 0.055) / 1.055), 2.4);}\n        return (0.2126 * R) + (0.7152 * G) + (0.0722 * B);\n    },\n    setAlpha: function(value) {\n        this._a = boundAlpha(value);\n        this._roundA = mathRound(100*this._a) / 100;\n        return this;\n    },\n    toHsv: function() {\n        var hsv = rgbToHsv(this._r, this._g, this._b);\n        return { h: hsv.h * 360, s: hsv.s, v: hsv.v, a: this._a };\n    },\n    toHsvString: function() {\n        var hsv = rgbToHsv(this._r, this._g, this._b);\n        var h = mathRound(hsv.h * 360), s = mathRound(hsv.s * 100), v = mathRound(hsv.v * 100);\n        return (this._a == 1) ?\n          \"hsv(\"  + h + \", \" + s + \"%, \" + v + \"%)\" :\n          \"hsva(\" + h + \", \" + s + \"%, \" + v + \"%, \"+ this._roundA + \")\";\n    },\n    toHsl: function() {\n        var hsl = rgbToHsl(this._r, this._g, this._b);\n        return { h: hsl.h * 360, s: hsl.s, l: hsl.l, a: this._a };\n    },\n    toHslString: function() {\n        var hsl = rgbToHsl(this._r, this._g, this._b);\n        var h = mathRound(hsl.h * 360), s = mathRound(hsl.s * 100), l = mathRound(hsl.l * 100);\n        return (this._a == 1) ?\n          \"hsl(\"  + h + \", \" + s + \"%, \" + l + \"%)\" :\n          \"hsla(\" + h + \", \" + s + \"%, \" + l + \"%, \"+ this._roundA + \")\";\n    },\n    toHex: function(allow3Char) {\n        return rgbToHex(this._r, this._g, this._b, allow3Char);\n    },\n    toHexString: function(allow3Char) {\n        return '#' + this.toHex(allow3Char);\n    },\n    toHex8: function(allow4Char) {\n        return rgbaToHex(this._r, this._g, this._b, this._a, allow4Char);\n    },\n    toHex8String: function(allow4Char) {\n        return '#' + this.toHex8(allow4Char);\n    },\n    toRgb: function() {\n        return { r: mathRound(this._r), g: mathRound(this._g), b: mathRound(this._b), a: this._a };\n    },\n    toRgbString: function() {\n        return (this._a == 1) ?\n          \"rgb(\"  + mathRound(this._r) + \", \" + mathRound(this._g) + \", \" + mathRound(this._b) + \")\" :\n          \"rgba(\" + mathRound(this._r) + \", \" + mathRound(this._g) + \", \" + mathRound(this._b) + \", \" + this._roundA + \")\";\n    },\n    toPercentageRgb: function() {\n        return { r: mathRound(bound01(this._r, 255) * 100) + \"%\", g: mathRound(bound01(this._g, 255) * 100) + \"%\", b: mathRound(bound01(this._b, 255) * 100) + \"%\", a: this._a };\n    },\n    toPercentageRgbString: function() {\n        return (this._a == 1) ?\n          \"rgb(\"  + mathRound(bound01(this._r, 255) * 100) + \"%, \" + mathRound(bound01(this._g, 255) * 100) + \"%, \" + mathRound(bound01(this._b, 255) * 100) + \"%)\" :\n          \"rgba(\" + mathRound(bound01(this._r, 255) * 100) + \"%, \" + mathRound(bound01(this._g, 255) * 100) + \"%, \" + mathRound(bound01(this._b, 255) * 100) + \"%, \" + this._roundA + \")\";\n    },\n    toName: function() {\n        if (this._a === 0) {\n            return \"transparent\";\n        }\n\n        if (this._a < 1) {\n            return false;\n        }\n\n        return hexNames[rgbToHex(this._r, this._g, this._b, true)] || false;\n    },\n    toFilter: function(secondColor) {\n        var hex8String = '#' + rgbaToArgbHex(this._r, this._g, this._b, this._a);\n        var secondHex8String = hex8String;\n        var gradientType = this._gradientType ? \"GradientType = 1, \" : \"\";\n\n        if (secondColor) {\n            var s = tinycolor(secondColor);\n            secondHex8String = '#' + rgbaToArgbHex(s._r, s._g, s._b, s._a);\n        }\n\n        return \"progid:DXImageTransform.Microsoft.gradient(\"+gradientType+\"startColorstr=\"+hex8String+\",endColorstr=\"+secondHex8String+\")\";\n    },\n    toString: function(format) {\n        var formatSet = !!format;\n        format = format || this._format;\n\n        var formattedString = false;\n        var hasAlpha = this._a < 1 && this._a >= 0;\n        var needsAlphaFormat = !formatSet && hasAlpha && (format === \"hex\" || format === \"hex6\" || format === \"hex3\" || format === \"hex4\" || format === \"hex8\" || format === \"name\");\n\n        if (needsAlphaFormat) {\n            // Special case for \"transparent\", all other non-alpha formats\n            // will return rgba when there is transparency.\n            if (format === \"name\" && this._a === 0) {\n                return this.toName();\n            }\n            return this.toRgbString();\n        }\n        if (format === \"rgb\") {\n            formattedString = this.toRgbString();\n        }\n        if (format === \"prgb\") {\n            formattedString = this.toPercentageRgbString();\n        }\n        if (format === \"hex\" || format === \"hex6\") {\n            formattedString = this.toHexString();\n        }\n        if (format === \"hex3\") {\n            formattedString = this.toHexString(true);\n        }\n        if (format === \"hex4\") {\n            formattedString = this.toHex8String(true);\n        }\n        if (format === \"hex8\") {\n            formattedString = this.toHex8String();\n        }\n        if (format === \"name\") {\n            formattedString = this.toName();\n        }\n        if (format === \"hsl\") {\n            formattedString = this.toHslString();\n        }\n        if (format === \"hsv\") {\n            formattedString = this.toHsvString();\n        }\n\n        return formattedString || this.toHexString();\n    },\n    clone: function() {\n        return tinycolor(this.toString());\n    },\n\n    _applyModification: function(fn, args) {\n        var color = fn.apply(null, [this].concat([].slice.call(args)));\n        this._r = color._r;\n        this._g = color._g;\n        this._b = color._b;\n        this.setAlpha(color._a);\n        return this;\n    },\n    lighten: function() {\n        return this._applyModification(lighten, arguments);\n    },\n    brighten: function() {\n        return this._applyModification(brighten, arguments);\n    },\n    darken: function() {\n        return this._applyModification(darken, arguments);\n    },\n    desaturate: function() {\n        return this._applyModification(desaturate, arguments);\n    },\n    saturate: function() {\n        return this._applyModification(saturate, arguments);\n    },\n    greyscale: function() {\n        return this._applyModification(greyscale, arguments);\n    },\n    spin: function() {\n        return this._applyModification(spin, arguments);\n    },\n\n    _applyCombination: function(fn, args) {\n        return fn.apply(null, [this].concat([].slice.call(args)));\n    },\n    analogous: function() {\n        return this._applyCombination(analogous, arguments);\n    },\n    complement: function() {\n        return this._applyCombination(complement, arguments);\n    },\n    monochromatic: function() {\n        return this._applyCombination(monochromatic, arguments);\n    },\n    splitcomplement: function() {\n        return this._applyCombination(splitcomplement, arguments);\n    },\n    triad: function() {\n        return this._applyCombination(triad, arguments);\n    },\n    tetrad: function() {\n        return this._applyCombination(tetrad, arguments);\n    }\n};\n\n// If input is an object, force 1 into \"1.0\" to handle ratios properly\n// String input requires \"1.0\" as input, so 1 will be treated as 1\ntinycolor.fromRatio = function(color, opts) {\n    if (typeof color == \"object\") {\n        var newColor = {};\n        for (var i in color) {\n            if (color.hasOwnProperty(i)) {\n                if (i === \"a\") {\n                    newColor[i] = color[i];\n                }\n                else {\n                    newColor[i] = convertToPercentage(color[i]);\n                }\n            }\n        }\n        color = newColor;\n    }\n\n    return tinycolor(color, opts);\n};\n\n// Given a string or object, convert that input to RGB\n// Possible string inputs:\n//\n//     \"red\"\n//     \"#f00\" or \"f00\"\n//     \"#ff0000\" or \"ff0000\"\n//     \"#ff000000\" or \"ff000000\"\n//     \"rgb 255 0 0\" or \"rgb (255, 0, 0)\"\n//     \"rgb 1.0 0 0\" or \"rgb (1, 0, 0)\"\n//     \"rgba (255, 0, 0, 1)\" or \"rgba 255, 0, 0, 1\"\n//     \"rgba (1.0, 0, 0, 1)\" or \"rgba 1.0, 0, 0, 1\"\n//     \"hsl(0, 100%, 50%)\" or \"hsl 0 100% 50%\"\n//     \"hsla(0, 100%, 50%, 1)\" or \"hsla 0 100% 50%, 1\"\n//     \"hsv(0, 100%, 100%)\" or \"hsv 0 100% 100%\"\n//\nfunction inputToRGB(color) {\n\n    var rgb = { r: 0, g: 0, b: 0 };\n    var a = 1;\n    var s = null;\n    var v = null;\n    var l = null;\n    var ok = false;\n    var format = false;\n\n    if (typeof color == \"string\") {\n        color = stringInputToObject(color);\n    }\n\n    if (typeof color == \"object\") {\n        if (isValidCSSUnit(color.r) && isValidCSSUnit(color.g) && isValidCSSUnit(color.b)) {\n            rgb = rgbToRgb(color.r, color.g, color.b);\n            ok = true;\n            format = String(color.r).substr(-1) === \"%\" ? \"prgb\" : \"rgb\";\n        }\n        else if (isValidCSSUnit(color.h) && isValidCSSUnit(color.s) && isValidCSSUnit(color.v)) {\n            s = convertToPercentage(color.s);\n            v = convertToPercentage(color.v);\n            rgb = hsvToRgb(color.h, s, v);\n            ok = true;\n            format = \"hsv\";\n        }\n        else if (isValidCSSUnit(color.h) && isValidCSSUnit(color.s) && isValidCSSUnit(color.l)) {\n            s = convertToPercentage(color.s);\n            l = convertToPercentage(color.l);\n            rgb = hslToRgb(color.h, s, l);\n            ok = true;\n            format = \"hsl\";\n        }\n\n        if (color.hasOwnProperty(\"a\")) {\n            a = color.a;\n        }\n    }\n\n    a = boundAlpha(a);\n\n    return {\n        ok: ok,\n        format: color.format || format,\n        r: mathMin(255, mathMax(rgb.r, 0)),\n        g: mathMin(255, mathMax(rgb.g, 0)),\n        b: mathMin(255, mathMax(rgb.b, 0)),\n        a: a\n    };\n}\n\n\n// Conversion Functions\n// --------------------\n\n// `rgbToHsl`, `rgbToHsv`, `hslToRgb`, `hsvToRgb` modified from:\n// <http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript>\n\n// `rgbToRgb`\n// Handle bounds / percentage checking to conform to CSS color spec\n// <http://www.w3.org/TR/css3-color/>\n// *Assumes:* r, g, b in [0, 255] or [0, 1]\n// *Returns:* { r, g, b } in [0, 255]\nfunction rgbToRgb(r, g, b){\n    return {\n        r: bound01(r, 255) * 255,\n        g: bound01(g, 255) * 255,\n        b: bound01(b, 255) * 255\n    };\n}\n\n// `rgbToHsl`\n// Converts an RGB color value to HSL.\n// *Assumes:* r, g, and b are contained in [0, 255] or [0, 1]\n// *Returns:* { h, s, l } in [0,1]\nfunction rgbToHsl(r, g, b) {\n\n    r = bound01(r, 255);\n    g = bound01(g, 255);\n    b = bound01(b, 255);\n\n    var max = mathMax(r, g, b), min = mathMin(r, g, b);\n    var h, s, l = (max + min) / 2;\n\n    if(max == min) {\n        h = s = 0; // achromatic\n    }\n    else {\n        var d = max - min;\n        s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n        switch(max) {\n            case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n            case g: h = (b - r) / d + 2; break;\n            case b: h = (r - g) / d + 4; break;\n        }\n\n        h /= 6;\n    }\n\n    return { h: h, s: s, l: l };\n}\n\n// `hslToRgb`\n// Converts an HSL color value to RGB.\n// *Assumes:* h is contained in [0, 1] or [0, 360] and s and l are contained [0, 1] or [0, 100]\n// *Returns:* { r, g, b } in the set [0, 255]\nfunction hslToRgb(h, s, l) {\n    var r, g, b;\n\n    h = bound01(h, 360);\n    s = bound01(s, 100);\n    l = bound01(l, 100);\n\n    function hue2rgb(p, q, t) {\n        if(t < 0) t += 1;\n        if(t > 1) t -= 1;\n        if(t < 1/6) return p + (q - p) * 6 * t;\n        if(t < 1/2) return q;\n        if(t < 2/3) return p + (q - p) * (2/3 - t) * 6;\n        return p;\n    }\n\n    if(s === 0) {\n        r = g = b = l; // achromatic\n    }\n    else {\n        var q = l < 0.5 ? l * (1 + s) : l + s - l * s;\n        var p = 2 * l - q;\n        r = hue2rgb(p, q, h + 1/3);\n        g = hue2rgb(p, q, h);\n        b = hue2rgb(p, q, h - 1/3);\n    }\n\n    return { r: r * 255, g: g * 255, b: b * 255 };\n}\n\n// `rgbToHsv`\n// Converts an RGB color value to HSV\n// *Assumes:* r, g, and b are contained in the set [0, 255] or [0, 1]\n// *Returns:* { h, s, v } in [0,1]\nfunction rgbToHsv(r, g, b) {\n\n    r = bound01(r, 255);\n    g = bound01(g, 255);\n    b = bound01(b, 255);\n\n    var max = mathMax(r, g, b), min = mathMin(r, g, b);\n    var h, s, v = max;\n\n    var d = max - min;\n    s = max === 0 ? 0 : d / max;\n\n    if(max == min) {\n        h = 0; // achromatic\n    }\n    else {\n        switch(max) {\n            case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n            case g: h = (b - r) / d + 2; break;\n            case b: h = (r - g) / d + 4; break;\n        }\n        h /= 6;\n    }\n    return { h: h, s: s, v: v };\n}\n\n// `hsvToRgb`\n// Converts an HSV color value to RGB.\n// *Assumes:* h is contained in [0, 1] or [0, 360] and s and v are contained in [0, 1] or [0, 100]\n// *Returns:* { r, g, b } in the set [0, 255]\n function hsvToRgb(h, s, v) {\n\n    h = bound01(h, 360) * 6;\n    s = bound01(s, 100);\n    v = bound01(v, 100);\n\n    var i = Math.floor(h),\n        f = h - i,\n        p = v * (1 - s),\n        q = v * (1 - f * s),\n        t = v * (1 - (1 - f) * s),\n        mod = i % 6,\n        r = [v, q, p, p, t, v][mod],\n        g = [t, v, v, q, p, p][mod],\n        b = [p, p, t, v, v, q][mod];\n\n    return { r: r * 255, g: g * 255, b: b * 255 };\n}\n\n// `rgbToHex`\n// Converts an RGB color to hex\n// Assumes r, g, and b are contained in the set [0, 255]\n// Returns a 3 or 6 character hex\nfunction rgbToHex(r, g, b, allow3Char) {\n\n    var hex = [\n        pad2(mathRound(r).toString(16)),\n        pad2(mathRound(g).toString(16)),\n        pad2(mathRound(b).toString(16))\n    ];\n\n    // Return a 3 character hex if possible\n    if (allow3Char && hex[0].charAt(0) == hex[0].charAt(1) && hex[1].charAt(0) == hex[1].charAt(1) && hex[2].charAt(0) == hex[2].charAt(1)) {\n        return hex[0].charAt(0) + hex[1].charAt(0) + hex[2].charAt(0);\n    }\n\n    return hex.join(\"\");\n}\n\n// `rgbaToHex`\n// Converts an RGBA color plus alpha transparency to hex\n// Assumes r, g, b are contained in the set [0, 255] and\n// a in [0, 1]. Returns a 4 or 8 character rgba hex\nfunction rgbaToHex(r, g, b, a, allow4Char) {\n\n    var hex = [\n        pad2(mathRound(r).toString(16)),\n        pad2(mathRound(g).toString(16)),\n        pad2(mathRound(b).toString(16)),\n        pad2(convertDecimalToHex(a))\n    ];\n\n    // Return a 4 character hex if possible\n    if (allow4Char && hex[0].charAt(0) == hex[0].charAt(1) && hex[1].charAt(0) == hex[1].charAt(1) && hex[2].charAt(0) == hex[2].charAt(1) && hex[3].charAt(0) == hex[3].charAt(1)) {\n        return hex[0].charAt(0) + hex[1].charAt(0) + hex[2].charAt(0) + hex[3].charAt(0);\n    }\n\n    return hex.join(\"\");\n}\n\n// `rgbaToArgbHex`\n// Converts an RGBA color to an ARGB Hex8 string\n// Rarely used, but required for \"toFilter()\"\nfunction rgbaToArgbHex(r, g, b, a) {\n\n    var hex = [\n        pad2(convertDecimalToHex(a)),\n        pad2(mathRound(r).toString(16)),\n        pad2(mathRound(g).toString(16)),\n        pad2(mathRound(b).toString(16))\n    ];\n\n    return hex.join(\"\");\n}\n\n// `equals`\n// Can be called with any tinycolor input\ntinycolor.equals = function (color1, color2) {\n    if (!color1 || !color2) { return false; }\n    return tinycolor(color1).toRgbString() == tinycolor(color2).toRgbString();\n};\n\ntinycolor.random = function() {\n    return tinycolor.fromRatio({\n        r: mathRandom(),\n        g: mathRandom(),\n        b: mathRandom()\n    });\n};\n\n\n// Modification Functions\n// ----------------------\n// Thanks to less.js for some of the basics here\n// <https://github.com/cloudhead/less.js/blob/master/lib/less/functions.js>\n\nfunction desaturate(color, amount) {\n    amount = (amount === 0) ? 0 : (amount || 10);\n    var hsl = tinycolor(color).toHsl();\n    hsl.s -= amount / 100;\n    hsl.s = clamp01(hsl.s);\n    return tinycolor(hsl);\n}\n\nfunction saturate(color, amount) {\n    amount = (amount === 0) ? 0 : (amount || 10);\n    var hsl = tinycolor(color).toHsl();\n    hsl.s += amount / 100;\n    hsl.s = clamp01(hsl.s);\n    return tinycolor(hsl);\n}\n\nfunction greyscale(color) {\n    return tinycolor(color).desaturate(100);\n}\n\nfunction lighten (color, amount) {\n    amount = (amount === 0) ? 0 : (amount || 10);\n    var hsl = tinycolor(color).toHsl();\n    hsl.l += amount / 100;\n    hsl.l = clamp01(hsl.l);\n    return tinycolor(hsl);\n}\n\nfunction brighten(color, amount) {\n    amount = (amount === 0) ? 0 : (amount || 10);\n    var rgb = tinycolor(color).toRgb();\n    rgb.r = mathMax(0, mathMin(255, rgb.r - mathRound(255 * - (amount / 100))));\n    rgb.g = mathMax(0, mathMin(255, rgb.g - mathRound(255 * - (amount / 100))));\n    rgb.b = mathMax(0, mathMin(255, rgb.b - mathRound(255 * - (amount / 100))));\n    return tinycolor(rgb);\n}\n\nfunction darken (color, amount) {\n    amount = (amount === 0) ? 0 : (amount || 10);\n    var hsl = tinycolor(color).toHsl();\n    hsl.l -= amount / 100;\n    hsl.l = clamp01(hsl.l);\n    return tinycolor(hsl);\n}\n\n// Spin takes a positive or negative amount within [-360, 360] indicating the change of hue.\n// Values outside of this range will be wrapped into this range.\nfunction spin(color, amount) {\n    var hsl = tinycolor(color).toHsl();\n    var hue = (hsl.h + amount) % 360;\n    hsl.h = hue < 0 ? 360 + hue : hue;\n    return tinycolor(hsl);\n}\n\n// Combination Functions\n// ---------------------\n// Thanks to jQuery xColor for some of the ideas behind these\n// <https://github.com/infusion/jQuery-xcolor/blob/master/jquery.xcolor.js>\n\nfunction complement(color) {\n    var hsl = tinycolor(color).toHsl();\n    hsl.h = (hsl.h + 180) % 360;\n    return tinycolor(hsl);\n}\n\nfunction triad(color) {\n    var hsl = tinycolor(color).toHsl();\n    var h = hsl.h;\n    return [\n        tinycolor(color),\n        tinycolor({ h: (h + 120) % 360, s: hsl.s, l: hsl.l }),\n        tinycolor({ h: (h + 240) % 360, s: hsl.s, l: hsl.l })\n    ];\n}\n\nfunction tetrad(color) {\n    var hsl = tinycolor(color).toHsl();\n    var h = hsl.h;\n    return [\n        tinycolor(color),\n        tinycolor({ h: (h + 90) % 360, s: hsl.s, l: hsl.l }),\n        tinycolor({ h: (h + 180) % 360, s: hsl.s, l: hsl.l }),\n        tinycolor({ h: (h + 270) % 360, s: hsl.s, l: hsl.l })\n    ];\n}\n\nfunction splitcomplement(color) {\n    var hsl = tinycolor(color).toHsl();\n    var h = hsl.h;\n    return [\n        tinycolor(color),\n        tinycolor({ h: (h + 72) % 360, s: hsl.s, l: hsl.l}),\n        tinycolor({ h: (h + 216) % 360, s: hsl.s, l: hsl.l})\n    ];\n}\n\nfunction analogous(color, results, slices) {\n    results = results || 6;\n    slices = slices || 30;\n\n    var hsl = tinycolor(color).toHsl();\n    var part = 360 / slices;\n    var ret = [tinycolor(color)];\n\n    for (hsl.h = ((hsl.h - (part * results >> 1)) + 720) % 360; --results; ) {\n        hsl.h = (hsl.h + part) % 360;\n        ret.push(tinycolor(hsl));\n    }\n    return ret;\n}\n\nfunction monochromatic(color, results) {\n    results = results || 6;\n    var hsv = tinycolor(color).toHsv();\n    var h = hsv.h, s = hsv.s, v = hsv.v;\n    var ret = [];\n    var modification = 1 / results;\n\n    while (results--) {\n        ret.push(tinycolor({ h: h, s: s, v: v}));\n        v = (v + modification) % 1;\n    }\n\n    return ret;\n}\n\n// Utility Functions\n// ---------------------\n\ntinycolor.mix = function(color1, color2, amount) {\n    amount = (amount === 0) ? 0 : (amount || 50);\n\n    var rgb1 = tinycolor(color1).toRgb();\n    var rgb2 = tinycolor(color2).toRgb();\n\n    var p = amount / 100;\n\n    var rgba = {\n        r: ((rgb2.r - rgb1.r) * p) + rgb1.r,\n        g: ((rgb2.g - rgb1.g) * p) + rgb1.g,\n        b: ((rgb2.b - rgb1.b) * p) + rgb1.b,\n        a: ((rgb2.a - rgb1.a) * p) + rgb1.a\n    };\n\n    return tinycolor(rgba);\n};\n\n\n// Readability Functions\n// ---------------------\n// <http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef (WCAG Version 2)\n\n// `contrast`\n// Analyze the 2 colors and returns the color contrast defined by (WCAG Version 2)\ntinycolor.readability = function(color1, color2) {\n    var c1 = tinycolor(color1);\n    var c2 = tinycolor(color2);\n    return (Math.max(c1.getLuminance(),c2.getLuminance())+0.05) / (Math.min(c1.getLuminance(),c2.getLuminance())+0.05);\n};\n\n// `isReadable`\n// Ensure that foreground and background color combinations meet WCAG2 guidelines.\n// The third argument is an optional Object.\n//      the 'level' property states 'AA' or 'AAA' - if missing or invalid, it defaults to 'AA';\n//      the 'size' property states 'large' or 'small' - if missing or invalid, it defaults to 'small'.\n// If the entire object is absent, isReadable defaults to {level:\"AA\",size:\"small\"}.\n\n// *Example*\n//    tinycolor.isReadable(\"#000\", \"#111\") => false\n//    tinycolor.isReadable(\"#000\", \"#111\",{level:\"AA\",size:\"large\"}) => false\ntinycolor.isReadable = function(color1, color2, wcag2) {\n    var readability = tinycolor.readability(color1, color2);\n    var wcag2Parms, out;\n\n    out = false;\n\n    wcag2Parms = validateWCAG2Parms(wcag2);\n    switch (wcag2Parms.level + wcag2Parms.size) {\n        case \"AAsmall\":\n        case \"AAAlarge\":\n            out = readability >= 4.5;\n            break;\n        case \"AAlarge\":\n            out = readability >= 3;\n            break;\n        case \"AAAsmall\":\n            out = readability >= 7;\n            break;\n    }\n    return out;\n\n};\n\n// `mostReadable`\n// Given a base color and a list of possible foreground or background\n// colors for that base, returns the most readable color.\n// Optionally returns Black or White if the most readable color is unreadable.\n// *Example*\n//    tinycolor.mostReadable(tinycolor.mostReadable(\"#123\", [\"#124\", \"#125\"],{includeFallbackColors:false}).toHexString(); // \"#112255\"\n//    tinycolor.mostReadable(tinycolor.mostReadable(\"#123\", [\"#124\", \"#125\"],{includeFallbackColors:true}).toHexString();  // \"#ffffff\"\n//    tinycolor.mostReadable(\"#a8015a\", [\"#faf3f3\"],{includeFallbackColors:true,level:\"AAA\",size:\"large\"}).toHexString(); // \"#faf3f3\"\n//    tinycolor.mostReadable(\"#a8015a\", [\"#faf3f3\"],{includeFallbackColors:true,level:\"AAA\",size:\"small\"}).toHexString(); // \"#ffffff\"\ntinycolor.mostReadable = function(baseColor, colorList, args) {\n    var bestColor = null;\n    var bestScore = 0;\n    var readability;\n    var includeFallbackColors, level, size ;\n    args = args || {};\n    includeFallbackColors = args.includeFallbackColors ;\n    level = args.level;\n    size = args.size;\n\n    for (var i= 0; i < colorList.length ; i++) {\n        readability = tinycolor.readability(baseColor, colorList[i]);\n        if (readability > bestScore) {\n            bestScore = readability;\n            bestColor = tinycolor(colorList[i]);\n        }\n    }\n\n    if (tinycolor.isReadable(baseColor, bestColor, {\"level\":level,\"size\":size}) || !includeFallbackColors) {\n        return bestColor;\n    }\n    else {\n        args.includeFallbackColors=false;\n        return tinycolor.mostReadable(baseColor,[\"#fff\", \"#000\"],args);\n    }\n};\n\n\n// Big List of Colors\n// ------------------\n// <http://www.w3.org/TR/css3-color/#svg-color>\nvar names = tinycolor.names = {\n    aliceblue: \"f0f8ff\",\n    antiquewhite: \"faebd7\",\n    aqua: \"0ff\",\n    aquamarine: \"7fffd4\",\n    azure: \"f0ffff\",\n    beige: \"f5f5dc\",\n    bisque: \"ffe4c4\",\n    black: \"000\",\n    blanchedalmond: \"ffebcd\",\n    blue: \"00f\",\n    blueviolet: \"8a2be2\",\n    brown: \"a52a2a\",\n    burlywood: \"deb887\",\n    burntsienna: \"ea7e5d\",\n    cadetblue: \"5f9ea0\",\n    chartreuse: \"7fff00\",\n    chocolate: \"d2691e\",\n    coral: \"ff7f50\",\n    cornflowerblue: \"6495ed\",\n    cornsilk: \"fff8dc\",\n    crimson: \"dc143c\",\n    cyan: \"0ff\",\n    darkblue: \"00008b\",\n    darkcyan: \"008b8b\",\n    darkgoldenrod: \"b8860b\",\n    darkgray: \"a9a9a9\",\n    darkgreen: \"006400\",\n    darkgrey: \"a9a9a9\",\n    darkkhaki: \"bdb76b\",\n    darkmagenta: \"8b008b\",\n    darkolivegreen: \"556b2f\",\n    darkorange: \"ff8c00\",\n    darkorchid: \"9932cc\",\n    darkred: \"8b0000\",\n    darksalmon: \"e9967a\",\n    darkseagreen: \"8fbc8f\",\n    darkslateblue: \"483d8b\",\n    darkslategray: \"2f4f4f\",\n    darkslategrey: \"2f4f4f\",\n    darkturquoise: \"00ced1\",\n    darkviolet: \"9400d3\",\n    deeppink: \"ff1493\",\n    deepskyblue: \"00bfff\",\n    dimgray: \"696969\",\n    dimgrey: \"696969\",\n    dodgerblue: \"1e90ff\",\n    firebrick: \"b22222\",\n    floralwhite: \"fffaf0\",\n    forestgreen: \"228b22\",\n    fuchsia: \"f0f\",\n    gainsboro: \"dcdcdc\",\n    ghostwhite: \"f8f8ff\",\n    gold: \"ffd700\",\n    goldenrod: \"daa520\",\n    gray: \"808080\",\n    green: \"008000\",\n    greenyellow: \"adff2f\",\n    grey: \"808080\",\n    honeydew: \"f0fff0\",\n    hotpink: \"ff69b4\",\n    indianred: \"cd5c5c\",\n    indigo: \"4b0082\",\n    ivory: \"fffff0\",\n    khaki: \"f0e68c\",\n    lavender: \"e6e6fa\",\n    lavenderblush: \"fff0f5\",\n    lawngreen: \"7cfc00\",\n    lemonchiffon: \"fffacd\",\n    lightblue: \"add8e6\",\n    lightcoral: \"f08080\",\n    lightcyan: \"e0ffff\",\n    lightgoldenrodyellow: \"fafad2\",\n    lightgray: \"d3d3d3\",\n    lightgreen: \"90ee90\",\n    lightgrey: \"d3d3d3\",\n    lightpink: \"ffb6c1\",\n    lightsalmon: \"ffa07a\",\n    lightseagreen: \"20b2aa\",\n    lightskyblue: \"87cefa\",\n    lightslategray: \"789\",\n    lightslategrey: \"789\",\n    lightsteelblue: \"b0c4de\",\n    lightyellow: \"ffffe0\",\n    lime: \"0f0\",\n    limegreen: \"32cd32\",\n    linen: \"faf0e6\",\n    magenta: \"f0f\",\n    maroon: \"800000\",\n    mediumaquamarine: \"66cdaa\",\n    mediumblue: \"0000cd\",\n    mediumorchid: \"ba55d3\",\n    mediumpurple: \"9370db\",\n    mediumseagreen: \"3cb371\",\n    mediumslateblue: \"7b68ee\",\n    mediumspringgreen: \"00fa9a\",\n    mediumturquoise: \"48d1cc\",\n    mediumvioletred: \"c71585\",\n    midnightblue: \"191970\",\n    mintcream: \"f5fffa\",\n    mistyrose: \"ffe4e1\",\n    moccasin: \"ffe4b5\",\n    navajowhite: \"ffdead\",\n    navy: \"000080\",\n    oldlace: \"fdf5e6\",\n    olive: \"808000\",\n    olivedrab: \"6b8e23\",\n    orange: \"ffa500\",\n    orangered: \"ff4500\",\n    orchid: \"da70d6\",\n    palegoldenrod: \"eee8aa\",\n    palegreen: \"98fb98\",\n    paleturquoise: \"afeeee\",\n    palevioletred: \"db7093\",\n    papayawhip: \"ffefd5\",\n    peachpuff: \"ffdab9\",\n    peru: \"cd853f\",\n    pink: \"ffc0cb\",\n    plum: \"dda0dd\",\n    powderblue: \"b0e0e6\",\n    purple: \"800080\",\n    rebeccapurple: \"663399\",\n    red: \"f00\",\n    rosybrown: \"bc8f8f\",\n    royalblue: \"4169e1\",\n    saddlebrown: \"8b4513\",\n    salmon: \"fa8072\",\n    sandybrown: \"f4a460\",\n    seagreen: \"2e8b57\",\n    seashell: \"fff5ee\",\n    sienna: \"a0522d\",\n    silver: \"c0c0c0\",\n    skyblue: \"87ceeb\",\n    slateblue: \"6a5acd\",\n    slategray: \"708090\",\n    slategrey: \"708090\",\n    snow: \"fffafa\",\n    springgreen: \"00ff7f\",\n    steelblue: \"4682b4\",\n    tan: \"d2b48c\",\n    teal: \"008080\",\n    thistle: \"d8bfd8\",\n    tomato: \"ff6347\",\n    turquoise: \"40e0d0\",\n    violet: \"ee82ee\",\n    wheat: \"f5deb3\",\n    white: \"fff\",\n    whitesmoke: \"f5f5f5\",\n    yellow: \"ff0\",\n    yellowgreen: \"9acd32\"\n};\n\n// Make it easy to access colors via `hexNames[hex]`\nvar hexNames = tinycolor.hexNames = flip(names);\n\n\n// Utilities\n// ---------\n\n// `{ 'name1': 'val1' }` becomes `{ 'val1': 'name1' }`\nfunction flip(o) {\n    var flipped = { };\n    for (var i in o) {\n        if (o.hasOwnProperty(i)) {\n            flipped[o[i]] = i;\n        }\n    }\n    return flipped;\n}\n\n// Return a valid alpha value [0,1] with all invalid values being set to 1\nfunction boundAlpha(a) {\n    a = parseFloat(a);\n\n    if (isNaN(a) || a < 0 || a > 1) {\n        a = 1;\n    }\n\n    return a;\n}\n\n// Take input from [0, n] and return it as [0, 1]\nfunction bound01(n, max) {\n    if (isOnePointZero(n)) { n = \"100%\"; }\n\n    var processPercent = isPercentage(n);\n    n = mathMin(max, mathMax(0, parseFloat(n)));\n\n    // Automatically convert percentage into number\n    if (processPercent) {\n        n = parseInt(n * max, 10) / 100;\n    }\n\n    // Handle floating point rounding errors\n    if ((Math.abs(n - max) < 0.000001)) {\n        return 1;\n    }\n\n    // Convert into [0, 1] range if it isn't already\n    return (n % max) / parseFloat(max);\n}\n\n// Force a number between 0 and 1\nfunction clamp01(val) {\n    return mathMin(1, mathMax(0, val));\n}\n\n// Parse a base-16 hex value into a base-10 integer\nfunction parseIntFromHex(val) {\n    return parseInt(val, 16);\n}\n\n// Need to handle 1.0 as 100%, since once it is a number, there is no difference between it and 1\n// <http://stackoverflow.com/questions/7422072/javascript-how-to-detect-number-as-a-decimal-including-1-0>\nfunction isOnePointZero(n) {\n    return typeof n == \"string\" && n.indexOf('.') != -1 && parseFloat(n) === 1;\n}\n\n// Check to see if string passed in is a percentage\nfunction isPercentage(n) {\n    return typeof n === \"string\" && n.indexOf('%') != -1;\n}\n\n// Force a hex value to have 2 characters\nfunction pad2(c) {\n    return c.length == 1 ? '0' + c : '' + c;\n}\n\n// Replace a decimal with it's percentage value\nfunction convertToPercentage(n) {\n    if (n <= 1) {\n        n = (n * 100) + \"%\";\n    }\n\n    return n;\n}\n\n// Converts a decimal to a hex value\nfunction convertDecimalToHex(d) {\n    return Math.round(parseFloat(d) * 255).toString(16);\n}\n// Converts a hex value to a decimal\nfunction convertHexToDecimal(h) {\n    return (parseIntFromHex(h) / 255);\n}\n\nvar matchers = (function() {\n\n    // <http://www.w3.org/TR/css3-values/#integers>\n    var CSS_INTEGER = \"[-\\\\+]?\\\\d+%?\";\n\n    // <http://www.w3.org/TR/css3-values/#number-value>\n    var CSS_NUMBER = \"[-\\\\+]?\\\\d*\\\\.\\\\d+%?\";\n\n    // Allow positive/negative integer/number.  Don't capture the either/or, just the entire outcome.\n    var CSS_UNIT = \"(?:\" + CSS_NUMBER + \")|(?:\" + CSS_INTEGER + \")\";\n\n    // Actual matching.\n    // Parentheses and commas are optional, but not required.\n    // Whitespace can take the place of commas or opening paren\n    var PERMISSIVE_MATCH3 = \"[\\\\s|\\\\(]+(\" + CSS_UNIT + \")[,|\\\\s]+(\" + CSS_UNIT + \")[,|\\\\s]+(\" + CSS_UNIT + \")\\\\s*\\\\)?\";\n    var PERMISSIVE_MATCH4 = \"[\\\\s|\\\\(]+(\" + CSS_UNIT + \")[,|\\\\s]+(\" + CSS_UNIT + \")[,|\\\\s]+(\" + CSS_UNIT + \")[,|\\\\s]+(\" + CSS_UNIT + \")\\\\s*\\\\)?\";\n\n    return {\n        CSS_UNIT: new RegExp(CSS_UNIT),\n        rgb: new RegExp(\"rgb\" + PERMISSIVE_MATCH3),\n        rgba: new RegExp(\"rgba\" + PERMISSIVE_MATCH4),\n        hsl: new RegExp(\"hsl\" + PERMISSIVE_MATCH3),\n        hsla: new RegExp(\"hsla\" + PERMISSIVE_MATCH4),\n        hsv: new RegExp(\"hsv\" + PERMISSIVE_MATCH3),\n        hsva: new RegExp(\"hsva\" + PERMISSIVE_MATCH4),\n        hex3: /^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/,\n        hex6: /^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/,\n        hex4: /^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/,\n        hex8: /^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/\n    };\n})();\n\n// `isValidCSSUnit`\n// Take in a single string / number and check to see if it looks like a CSS unit\n// (see `matchers` above for definition).\nfunction isValidCSSUnit(color) {\n    return !!matchers.CSS_UNIT.exec(color);\n}\n\n// `stringInputToObject`\n// Permissive string parsing.  Take in a number of formats, and output an object\n// based on detected format.  Returns `{ r, g, b }` or `{ h, s, l }` or `{ h, s, v}`\nfunction stringInputToObject(color) {\n\n    color = color.replace(trimLeft,'').replace(trimRight, '').toLowerCase();\n    var named = false;\n    if (names[color]) {\n        color = names[color];\n        named = true;\n    }\n    else if (color == 'transparent') {\n        return { r: 0, g: 0, b: 0, a: 0, format: \"name\" };\n    }\n\n    // Try to match string input using regular expressions.\n    // Keep most of the number bounding out of this function - don't worry about [0,1] or [0,100] or [0,360]\n    // Just return an object and let the conversion functions handle that.\n    // This way the result will be the same whether the tinycolor is initialized with string or object.\n    var match;\n    if ((match = matchers.rgb.exec(color))) {\n        return { r: match[1], g: match[2], b: match[3] };\n    }\n    if ((match = matchers.rgba.exec(color))) {\n        return { r: match[1], g: match[2], b: match[3], a: match[4] };\n    }\n    if ((match = matchers.hsl.exec(color))) {\n        return { h: match[1], s: match[2], l: match[3] };\n    }\n    if ((match = matchers.hsla.exec(color))) {\n        return { h: match[1], s: match[2], l: match[3], a: match[4] };\n    }\n    if ((match = matchers.hsv.exec(color))) {\n        return { h: match[1], s: match[2], v: match[3] };\n    }\n    if ((match = matchers.hsva.exec(color))) {\n        return { h: match[1], s: match[2], v: match[3], a: match[4] };\n    }\n    if ((match = matchers.hex8.exec(color))) {\n        return {\n            r: parseIntFromHex(match[1]),\n            g: parseIntFromHex(match[2]),\n            b: parseIntFromHex(match[3]),\n            a: convertHexToDecimal(match[4]),\n            format: named ? \"name\" : \"hex8\"\n        };\n    }\n    if ((match = matchers.hex6.exec(color))) {\n        return {\n            r: parseIntFromHex(match[1]),\n            g: parseIntFromHex(match[2]),\n            b: parseIntFromHex(match[3]),\n            format: named ? \"name\" : \"hex\"\n        };\n    }\n    if ((match = matchers.hex4.exec(color))) {\n        return {\n            r: parseIntFromHex(match[1] + '' + match[1]),\n            g: parseIntFromHex(match[2] + '' + match[2]),\n            b: parseIntFromHex(match[3] + '' + match[3]),\n            a: convertHexToDecimal(match[4] + '' + match[4]),\n            format: named ? \"name\" : \"hex8\"\n        };\n    }\n    if ((match = matchers.hex3.exec(color))) {\n        return {\n            r: parseIntFromHex(match[1] + '' + match[1]),\n            g: parseIntFromHex(match[2] + '' + match[2]),\n            b: parseIntFromHex(match[3] + '' + match[3]),\n            format: named ? \"name\" : \"hex\"\n        };\n    }\n\n    return false;\n}\n\nfunction validateWCAG2Parms(parms) {\n    // return valid WCAG2 parms for isReadable.\n    // If input parms are invalid, return {\"level\":\"AA\", \"size\":\"small\"}\n    var level, size;\n    parms = parms || {\"level\":\"AA\", \"size\":\"small\"};\n    level = (parms.level || \"AA\").toUpperCase();\n    size = (parms.size || \"small\").toLowerCase();\n    if (level !== \"AA\" && level !== \"AAA\") {\n        level = \"AA\";\n    }\n    if (size !== \"small\" && size !== \"large\") {\n        size = \"small\";\n    }\n    return {\"level\":level, \"size\":size};\n}\n\n// Node: Export function\nif (typeof module !== \"undefined\" && module.exports) {\n    module.exports = tinycolor;\n}\n// AMD/requirejs: Define the module\nelse if (typeof define === 'function' && define.amd) {\n    define(function () {return tinycolor;});\n}\n// Browser: Expose to window\nelse {\n    window.tinycolor = tinycolor;\n}\n\n})(Math);\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  var d3 = require(\"d3\");\r\n  var minicharts = require(\"minicharts\");\r\n  var utils = require(\"./utils.js\");\r\n\r\n  L.Minichart = L.CircleMarker.extend({\r\n    /** Options used to initialize/update a Minichart object.\r\n      * @typedef {object} MinichartOptions\r\n      * @memberOf 'L.Minichart'\r\n      * @prop {string} [type = \"bar\"]\r\n      * Type of chart to create. Possible values are \"bar\" for barcharts, \"pie\"\r\n      * for pie charts, \"polar-radius\" and \"polar-area\" for polar area charts\r\n      * where values are represented either by the radius or the area of the\r\n      * slices.\r\n      * @prop {number[]} [data = [1]]\r\n      * Data values the chart has to represent.\r\n      * @prop {number[]|\"auto\"} [maxValues = \"auto\"]\r\n      * maximal absolute value the data could take. It can be a single numeric\r\n      * value or an array of values with same length as data. In the first case,\r\n      * all values will be represented with the same scale while in the second\r\n      * case, each value will have its own scale. This is useful when one wants\r\n      * to represent multiple variables that are not comparable. If it equals to\r\n      * \"auto\" (the default) then the maximum absolute value in data is used.\r\n      * @prop {string[]} [colors=d3.schemeCategory10] Array of colors. If its\r\n      * length is less than the length of data, colors are recycled.\r\n      * @prop {number} [width=60]\r\n      * Width of the chart when `type` equals 'bar' or maximal diameter of the\r\n      * chart for all other types.\r\n      * @prop {number} [height=60]\r\n      * Maximal height of barcharts.\r\n      * @prop {string[]|\"none\"|\"auto\"}[labels=\"none\"]\r\n      * Labels to display on the chart. If it equals to \"auto\" then data values\r\n      * are displayed in a compact way.\r\n      * @prop {number} [labelMinSize=8]\r\n      * Labels are automatically hidden if the label height is less than this number.\r\n      * @prop {number} [labelMaxSize=24]\r\n      * Maximal height of labels in pixels.\r\n      * @prop {number} [labelPadding=2]\r\n      * Padding to apply to labels.\r\n      * @prop {string} [labelStyle=\"font-family:sans-serif\"]\r\n      * CSS style to apply to labels\r\n      * @prop {string} [labelColor=\"auto\"]\r\n      * Color to apply to labels. If \"auto\", text will be black or white\r\n      * depending on the background color.\r\n      * @prop {number} [transitionTime=750]\r\n      * Duration in millisecondq of transitions.\r\n      *\r\n      */\r\n    options: {\r\n      type: \"bar\",\r\n      data: [1],\r\n      maxValues: \"auto\",\r\n      colors: d3.schemeCategory10,\r\n      width: 60,\r\n      height: 60,\r\n      opacity: 1,\r\n      labels:\"none\",\r\n      labelMinSize: 8,\r\n      labelMaxSize: 24,\r\n      labelPadding: 2,\r\n      labelColor: \"auto\",\r\n      labelStyle: \"font-family:sans-serif\",\r\n      transitionTime: 750\r\n    },\r\n\r\n    /**\r\n      * @class 'L.Minichart'\r\n      * @summary add add bar, pie and polar charts to a leaflet map\r\n      * @desc L.Minichart is used to add dynamic charts on a leaflet map. It is specially\r\n      * useful to represent multiple data values associated to some geographical\r\n      * coordinates.\r\n      *\r\n      * @example\r\n      *\r\n      * L.minichart([0, 0], {data: [1, 2, 3], maxValues: 3})\r\n      *\r\n      * @param {L.Point} center\r\n      * @param {MinichartOptions} options - Object containing\r\n      * options to construct a chart.\r\n      */\r\n    initialize: function(center, options) {\r\n      this._center = center;\r\n      this._zoom = 0;\r\n      this.options = utils.mergeOptions(options, this.options);\r\n      L.CircleMarker.prototype.initialize.call(\r\n        this,\r\n        center,\r\n        {radius: this.options.width/2, stroke: false, fill: false}\r\n      );\r\n    },\r\n\r\n    onAdd: function(map) {\r\n      L.CircleMarker.prototype.onAdd.call(this, map);\r\n      // Change class of container so that the element hides when zooming\r\n      var container = this._container || this._renderer._container;\r\n      container.setAttribute(\"class\", \"leaflet-zoom-hide\");\r\n\r\n      // create the svg element that holds the chart\r\n      this._chart = d3.select(container).append(\"g\");\r\n\r\n      map.on('moveend', this._onMoveend, this);\r\n      this._redraw(true);\r\n    },\r\n\r\n    onRemove: function(map) {\r\n      // remove layer's DOM elements and listeners\r\n      L.CircleMarker.prototype.onRemove.call(this, map);\r\n      map.off('moveend', this._onMoveend, this);\r\n    },\r\n\r\n    _onMoveend: function() {\r\n      // Redraw chart only if zoom has changed\r\n      var oldZoom = this._zoom;\r\n      this._zoom = this._map.getZoom();\r\n      if (oldZoom != this._zoom) this._redraw() ;\r\n    },\r\n\r\n    /** Update the options of a minichart object.\r\n      * @method setOptions\r\n      * @instance\r\n      * @memberOf 'L.Minichart'\r\n      *\r\n      * @param {MinichartOptions} options - Object containing options to update the chart.\r\n      */\r\n    setOptions: function(options) {\r\n      var newChart = options.type && options.type != this.options.type;\r\n      this.options = utils.mergeOptions(options, this.options);\r\n      this._redraw(newChart);\r\n    },\r\n\r\n    _redraw: function(newChart) {\r\n      // Move container on the map\r\n      var c = this._map.latLngToLayerPoint(this._center);\r\n      var h;\r\n      if (this.options.type == \"bar\") {\r\n        h = this.options.height * 2;\r\n      } else {\r\n        h = this.options.width;\r\n      }\r\n      this._chart\r\n        .attr(\"transform\", \"translate(\" + (c.x - this.options.width / 2) + \",\" + (c.y - h / 2) + \")\")\r\n        .transition()\r\n        .duration(this.options.transitionTime)\r\n        .attr(\"opacity\", this.options.opacity);\r\n\r\n      // prepare data\r\n      var data = this.options.data;\r\n      data = utils.toArray(data);\r\n      for (var i = 0; i < data.length; i++) {\r\n        if (isNaN(data[i]) || !isFinite(data[i])) data[i] = 0;\r\n      }\r\n\r\n      // Max absolute value for each variable\r\n      var max = this.options.maxValues;\r\n      if (max === \"auto\") {\r\n        max = Math.max(\r\n          d3.max(data),\r\n          Math.abs(d3.min(data))\r\n        )\r\n      }\r\n      max = utils.toArray(max);\r\n\r\n      if(max.length !== 1 && max.length != data.length) {\r\n        throw new Error(\"'maxValues' should be a single number or have same length as 'data'\");\r\n      }\r\n\r\n      // Scale data. This step is essential to have different scales for each\r\n      // variable. Only relevant if chart is not a pie/\r\n      var dataScaled = [];\r\n\r\n      if (this.options.type == \"pie\") {\r\n        dataScaled = data;\r\n      } else {\r\n        for (var i = 0; i < data.length; i++) {\r\n          dataScaled.push(data[i] / max[i % max.length]);\r\n        }\r\n      }\r\n\r\n      // Prepare labels\r\n      var labels = this.options.labels;\r\n      if (labels === \"auto\") {\r\n        labels = utils.prettyNumbers(data);\r\n      }\r\n\r\n      // Generator function\r\n      var generator, type;\r\n      switch(this.options.type) {\r\n        case \"bar\":\r\n          generator = minicharts.Barchart;\r\n          break;\r\n        case \"pie\":\r\n          generator = minicharts.Piechart;\r\n          break;\r\n        case \"polar-radius\":\r\n          generator = minicharts.Polarchart;\r\n          type = \"radius\";\r\n          break;\r\n        case \"polar-area\":\r\n          generator = minicharts.Polarchart;\r\n          type = \"area\";\r\n          break;\r\n      }\r\n\r\n      // Graphical options for the generator function\r\n      var chartOpts = {\r\n        width: this.options.width,\r\n        height: this.options.height * 2, // Used only if type = \"bar\"\r\n        colors: this.options.colors,\r\n        type: type,\r\n        transitionTime: this.options.transitionTime,\r\n        minValue: -1,\r\n        maxValue:1,\r\n        labels: labels,\r\n        labelColors: this.options.labelColor,\r\n        labelMinSize: this.options.labelMinSize,\r\n        labelMaxSize: this.options.labelMaxSize,\r\n        labelPadding: this.options.labelPadding,\r\n        labelClass: \"leaflet-clickable\",\r\n        shapeClass: \"leaflet-clickable\"\r\n      };\r\n\r\n      // Create of update chart\r\n      if (newChart === true) {\r\n        this._chart.selectAll(\"*\").remove();\r\n        this._chartObject = new generator(this._chart.node(), dataScaled, chartOpts);\r\n      } else {\r\n        this._chartObject.update(dataScaled, chartOpts);\r\n      }\r\n    }\r\n  });\r\n\r\n  L.minichart = function(center, options) {\r\n  return new L.Minichart(center, options);\r\n};\r\n})();\r\n","(function() {\r\n  'use strict';\r\n\r\n  module.exports.mergeOptions = mergeOptions;\r\n  module.exports.toArray = toArray;\r\n  module.exports.toFunction = toFunction;\r\n  module.exports.prettyNumbers = function(numbers) {\r\n    return numbers.map(prettyNumber);\r\n  }\r\n\r\n  function mergeOptions(options, defaults) {\r\n    if (options) options = JSON.parse(JSON.stringify(options));\r\n    else options = {};\r\n    defaults = defaults || {};\r\n    for (var opt in defaults) {\r\n      if (defaults.hasOwnProperty(opt) && !options.hasOwnProperty(opt)) {\r\n        options[opt] = defaults[opt];\r\n      }\r\n    }\r\n    return options;\r\n  }\r\n\r\n  function toArray(x) {\r\n    if (x.constructor !== Array) x = [x];\r\n    return x;\r\n  }\r\n\r\n  function toFunction(x) {\r\n    if (typeof x === \"function\") return (x);\r\n    x = toArray(x);\r\n    return function(d, i) {return x[i % x.length]};\r\n  }\r\n\r\n  function prettyNumber(number) {\r\n    if (isNaN(number) || !isFinite(number)) return \"\";\r\n\r\n    var absVal = Math.abs(number);\r\n    var sign= number < 0? \"-\": \"\";\r\n    var scale;\r\n\r\n    if( absVal < 1000 ) {\r\n        scale = '';\r\n    } else if( absVal < 1000000 ) {\r\n        scale = 'K';\r\n        absVal = absVal/1000;\r\n\r\n    } else if( absVal < 1000000000 ) {\r\n        scale = 'M';\r\n        absVal = absVal/1000000;\r\n\r\n    } else if( absVal < 1000000000000 ) {\r\n        scale = 'B';\r\n        absVal = absVal/1000000000;\r\n\r\n    } else if( absVal < 1000000000000000 ) {\r\n        scale = 'T';\r\n        absVal = absVal/1000000000000;\r\n    }\r\n\r\n    if (absVal > 10) absVal = roundTo(absVal);\r\n    else if (absVal > 1) absVal = roundTo(absVal, 10, true);\r\n    else absVal = roundTo(absVal, 100, true);\r\n\r\n    return sign + absVal + scale;\r\n  }\r\n\r\n  function roundTo(number, to, inverse) {\r\n    to = to || 1;\r\n    if (inverse) return Math.round(number * to) / to;\r\n    else return Math.round(number / to) * to;\r\n  }\r\n}());\r\n"]} +//# 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e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})","// https://d3js.org Version 4.7.4. Copyright 2017 Mike Bostock.\n(function (global, factory) {\n\ttypeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n\ttypeof define === 'function' && define.amd ? define(['exports'], factory) :\n\t(factory((global.d3 = global.d3 || {})));\n}(this, (function (exports) { 'use strict';\n\nvar version = \"4.7.4\";\n\nvar ascending = function(a, b) {\n  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;\n};\n\nvar bisector = function(compare) {\n  if (compare.length === 1) compare = ascendingComparator(compare);\n  return {\n    left: function(a, x, lo, hi) {\n      if (lo == null) lo = 0;\n      if (hi == null) hi = a.length;\n      while (lo < hi) {\n        var mid = lo + hi >>> 1;\n        if (compare(a[mid], x) < 0) lo = mid + 1;\n        else hi = mid;\n      }\n      return lo;\n    },\n    right: function(a, x, lo, hi) {\n      if (lo == null) lo = 0;\n      if (hi == null) hi = a.length;\n      while (lo < hi) {\n        var mid = lo + hi >>> 1;\n        if (compare(a[mid], x) > 0) hi = mid;\n        else lo = mid + 1;\n      }\n      return lo;\n    }\n  };\n};\n\nfunction ascendingComparator(f) {\n  return function(d, x) {\n    return ascending(f(d), x);\n  };\n}\n\nvar ascendingBisect = bisector(ascending);\nvar bisectRight = ascendingBisect.right;\nvar bisectLeft = ascendingBisect.left;\n\nvar pairs = function(array, f) {\n  if (f == null) f = pair;\n  var i = 0, n = array.length - 1, p = array[0], pairs = new Array(n < 0 ? 0 : n);\n  while (i < n) pairs[i] = f(p, p = array[++i]);\n  return pairs;\n};\n\nfunction pair(a, b) {\n  return [a, b];\n}\n\nvar cross = function(a, b, f) {\n  var na = a.length, nb = b.length, c = new Array(na * nb), ia, ib, ic, va;\n  if (f == null) f = pair;\n  for (ia = ic = 0; ia < na; ++ia) for (va = a[ia], ib = 0; ib < nb; ++ib, ++ic) c[ic] = f(va, b[ib]);\n  return c;\n};\n\nvar descending = function(a, b) {\n  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;\n};\n\nvar number = function(x) {\n  return x === null ? NaN : +x;\n};\n\nvar variance = function(array, f) {\n  var n = array.length,\n      m = 0,\n      a,\n      d,\n      s = 0,\n      i = -1,\n      j = 0;\n\n  if (f == null) {\n    while (++i < n) {\n      if (!isNaN(a = number(array[i]))) {\n        d = a - m;\n        m += d / ++j;\n        s += d * (a - m);\n      }\n    }\n  }\n\n  else {\n    while (++i < n) {\n      if (!isNaN(a = number(f(array[i], i, array)))) {\n        d = a - m;\n        m += d / ++j;\n        s += d * (a - m);\n      }\n    }\n  }\n\n  if (j > 1) return s / (j - 1);\n};\n\nvar deviation = function(array, f) {\n  var v = variance(array, f);\n  return v ? Math.sqrt(v) : v;\n};\n\nvar extent = function(array, f) {\n  var i = -1,\n      n = array.length,\n      a,\n      b,\n      c;\n\n  if (f == null) {\n    while (++i < n) if ((b = array[i]) != null && b >= b) { a = c = b; break; }\n    while (++i < n) if ((b = array[i]) != null) {\n      if (a > b) a = b;\n      if (c < b) c = b;\n    }\n  }\n\n  else {\n    while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) { a = c = b; break; }\n    while (++i < n) if ((b = f(array[i], i, array)) != null) {\n      if (a > b) a = b;\n      if (c < b) c = b;\n    }\n  }\n\n  return [a, c];\n};\n\nvar array = Array.prototype;\n\nvar slice = array.slice;\nvar map = array.map;\n\nvar constant = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar identity = function(x) {\n  return x;\n};\n\nvar sequence = function(start, stop, step) {\n  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;\n\n  var i = -1,\n      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,\n      range = new Array(n);\n\n  while (++i < n) {\n    range[i] = start + i * step;\n  }\n\n  return range;\n};\n\nvar e10 = Math.sqrt(50);\nvar e5 = Math.sqrt(10);\nvar e2 = Math.sqrt(2);\n\nvar ticks = function(start, stop, count) {\n  var step = tickStep(start, stop, count);\n  return sequence(\n    Math.ceil(start / step) * step,\n    Math.floor(stop / step) * step + step / 2, // inclusive\n    step\n  );\n};\n\nfunction tickStep(start, stop, count) {\n  var step0 = Math.abs(stop - start) / Math.max(0, count),\n      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),\n      error = step0 / step1;\n  if (error >= e10) step1 *= 10;\n  else if (error >= e5) step1 *= 5;\n  else if (error >= e2) step1 *= 2;\n  return stop < start ? -step1 : step1;\n}\n\nvar sturges = function(values) {\n  return Math.ceil(Math.log(values.length) / Math.LN2) + 1;\n};\n\nvar histogram = function() {\n  var value = identity,\n      domain = extent,\n      threshold = sturges;\n\n  function histogram(data) {\n    var i,\n        n = data.length,\n        x,\n        values = new Array(n);\n\n    for (i = 0; i < n; ++i) {\n      values[i] = value(data[i], i, data);\n    }\n\n    var xz = domain(values),\n        x0 = xz[0],\n        x1 = xz[1],\n        tz = threshold(values, x0, x1);\n\n    // Convert number of thresholds into uniform thresholds.\n    if (!Array.isArray(tz)) tz = ticks(x0, x1, tz);\n\n    // Remove any thresholds outside the domain.\n    var m = tz.length;\n    while (tz[0] <= x0) tz.shift(), --m;\n    while (tz[m - 1] >= x1) tz.pop(), --m;\n\n    var bins = new Array(m + 1),\n        bin;\n\n    // Initialize bins.\n    for (i = 0; i <= m; ++i) {\n      bin = bins[i] = [];\n      bin.x0 = i > 0 ? tz[i - 1] : x0;\n      bin.x1 = i < m ? tz[i] : x1;\n    }\n\n    // Assign data to bins by value, ignoring any outside the domain.\n    for (i = 0; i < n; ++i) {\n      x = values[i];\n      if (x0 <= x && x <= x1) {\n        bins[bisectRight(tz, x, 0, m)].push(data[i]);\n      }\n    }\n\n    return bins;\n  }\n\n  histogram.value = function(_) {\n    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant(_), histogram) : value;\n  };\n\n  histogram.domain = function(_) {\n    return arguments.length ? (domain = typeof _ === \"function\" ? _ : constant([_[0], _[1]]), histogram) : domain;\n  };\n\n  histogram.thresholds = function(_) {\n    return arguments.length ? (threshold = typeof _ === \"function\" ? _ : Array.isArray(_) ? constant(slice.call(_)) : constant(_), histogram) : threshold;\n  };\n\n  return histogram;\n};\n\nvar threshold = function(array, p, f) {\n  if (f == null) f = number;\n  if (!(n = array.length)) return;\n  if ((p = +p) <= 0 || n < 2) return +f(array[0], 0, array);\n  if (p >= 1) return +f(array[n - 1], n - 1, array);\n  var n,\n      h = (n - 1) * p,\n      i = Math.floor(h),\n      a = +f(array[i], i, array),\n      b = +f(array[i + 1], i + 1, array);\n  return a + (b - a) * (h - i);\n};\n\nvar freedmanDiaconis = function(values, min, max) {\n  values = map.call(values, number).sort(ascending);\n  return Math.ceil((max - min) / (2 * (threshold(values, 0.75) - threshold(values, 0.25)) * Math.pow(values.length, -1 / 3)));\n};\n\nvar scott = function(values, min, max) {\n  return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(values.length, -1 / 3)));\n};\n\nvar max = function(array, f) {\n  var i = -1,\n      n = array.length,\n      a,\n      b;\n\n  if (f == null) {\n    while (++i < n) if ((b = array[i]) != null && b >= b) { a = b; break; }\n    while (++i < n) if ((b = array[i]) != null && b > a) a = b;\n  }\n\n  else {\n    while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) { a = b; break; }\n    while (++i < n) if ((b = f(array[i], i, array)) != null && b > a) a = b;\n  }\n\n  return a;\n};\n\nvar mean = function(array, f) {\n  var s = 0,\n      n = array.length,\n      a,\n      i = -1,\n      j = n;\n\n  if (f == null) {\n    while (++i < n) if (!isNaN(a = number(array[i]))) s += a; else --j;\n  }\n\n  else {\n    while (++i < n) if (!isNaN(a = number(f(array[i], i, array)))) s += a; else --j;\n  }\n\n  if (j) return s / j;\n};\n\nvar median = function(array, f) {\n  var numbers = [],\n      n = array.length,\n      a,\n      i = -1;\n\n  if (f == null) {\n    while (++i < n) if (!isNaN(a = number(array[i]))) numbers.push(a);\n  }\n\n  else {\n    while (++i < n) if (!isNaN(a = number(f(array[i], i, array)))) numbers.push(a);\n  }\n\n  return threshold(numbers.sort(ascending), 0.5);\n};\n\nvar merge = function(arrays) {\n  var n = arrays.length,\n      m,\n      i = -1,\n      j = 0,\n      merged,\n      array;\n\n  while (++i < n) j += arrays[i].length;\n  merged = new Array(j);\n\n  while (--n >= 0) {\n    array = arrays[n];\n    m = array.length;\n    while (--m >= 0) {\n      merged[--j] = array[m];\n    }\n  }\n\n  return merged;\n};\n\nvar min = function(array, f) {\n  var i = -1,\n      n = array.length,\n      a,\n      b;\n\n  if (f == null) {\n    while (++i < n) if ((b = array[i]) != null && b >= b) { a = b; break; }\n    while (++i < n) if ((b = array[i]) != null && a > b) a = b;\n  }\n\n  else {\n    while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) { a = b; break; }\n    while (++i < n) if ((b = f(array[i], i, array)) != null && a > b) a = b;\n  }\n\n  return a;\n};\n\nvar permute = function(array, indexes) {\n  var i = indexes.length, permutes = new Array(i);\n  while (i--) permutes[i] = array[indexes[i]];\n  return permutes;\n};\n\nvar scan = function(array, compare) {\n  if (!(n = array.length)) return;\n  var i = 0,\n      n,\n      j = 0,\n      xi,\n      xj = array[j];\n\n  if (!compare) compare = ascending;\n\n  while (++i < n) if (compare(xi = array[i], xj) < 0 || compare(xj, xj) !== 0) xj = xi, j = i;\n\n  if (compare(xj, xj) === 0) return j;\n};\n\nvar shuffle = function(array, i0, i1) {\n  var m = (i1 == null ? array.length : i1) - (i0 = i0 == null ? 0 : +i0),\n      t,\n      i;\n\n  while (m) {\n    i = Math.random() * m-- | 0;\n    t = array[m + i0];\n    array[m + i0] = array[i + i0];\n    array[i + i0] = t;\n  }\n\n  return array;\n};\n\nvar sum = function(array, f) {\n  var s = 0,\n      n = array.length,\n      a,\n      i = -1;\n\n  if (f == null) {\n    while (++i < n) if (a = +array[i]) s += a; // Note: zero and null are equivalent.\n  }\n\n  else {\n    while (++i < n) if (a = +f(array[i], i, array)) s += a;\n  }\n\n  return s;\n};\n\nvar transpose = function(matrix) {\n  if (!(n = matrix.length)) return [];\n  for (var i = -1, m = min(matrix, length), transpose = new Array(m); ++i < m;) {\n    for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {\n      row[j] = matrix[j][i];\n    }\n  }\n  return transpose;\n};\n\nfunction length(d) {\n  return d.length;\n}\n\nvar zip = function() {\n  return transpose(arguments);\n};\n\nvar slice$1 = Array.prototype.slice;\n\nvar identity$1 = function(x) {\n  return x;\n};\n\nvar top = 1;\nvar right = 2;\nvar bottom = 3;\nvar left = 4;\nvar epsilon = 1e-6;\n\nfunction translateX(x) {\n  return \"translate(\" + x + \",0)\";\n}\n\nfunction translateY(y) {\n  return \"translate(0,\" + y + \")\";\n}\n\nfunction center(scale) {\n  var offset = scale.bandwidth() / 2;\n  if (scale.round()) offset = Math.round(offset);\n  return function(d) {\n    return scale(d) + offset;\n  };\n}\n\nfunction entering() {\n  return !this.__axis;\n}\n\nfunction axis(orient, scale) {\n  var tickArguments = [],\n      tickValues = null,\n      tickFormat = null,\n      tickSizeInner = 6,\n      tickSizeOuter = 6,\n      tickPadding = 3,\n      k = orient === top || orient === left ? -1 : 1,\n      x, y = orient === left || orient === right ? (x = \"x\", \"y\") : (x = \"y\", \"x\"),\n      transform = orient === top || orient === bottom ? translateX : translateY;\n\n  function axis(context) {\n    var values = tickValues == null ? (scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain()) : tickValues,\n        format = tickFormat == null ? (scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity$1) : tickFormat,\n        spacing = Math.max(tickSizeInner, 0) + tickPadding,\n        range = scale.range(),\n        range0 = range[0] + 0.5,\n        range1 = range[range.length - 1] + 0.5,\n        position = (scale.bandwidth ? center : identity$1)(scale.copy()),\n        selection = context.selection ? context.selection() : context,\n        path = selection.selectAll(\".domain\").data([null]),\n        tick = selection.selectAll(\".tick\").data(values, scale).order(),\n        tickExit = tick.exit(),\n        tickEnter = tick.enter().append(\"g\").attr(\"class\", \"tick\"),\n        line = tick.select(\"line\"),\n        text = tick.select(\"text\");\n\n    path = path.merge(path.enter().insert(\"path\", \".tick\")\n        .attr(\"class\", \"domain\")\n        .attr(\"stroke\", \"#000\"));\n\n    tick = tick.merge(tickEnter);\n\n    line = line.merge(tickEnter.append(\"line\")\n        .attr(\"stroke\", \"#000\")\n        .attr(x + \"2\", k * tickSizeInner)\n        .attr(y + \"1\", 0.5)\n        .attr(y + \"2\", 0.5));\n\n    text = text.merge(tickEnter.append(\"text\")\n        .attr(\"fill\", \"#000\")\n        .attr(x, k * spacing)\n        .attr(y, 0.5)\n        .attr(\"dy\", orient === top ? \"0em\" : orient === bottom ? \"0.71em\" : \"0.32em\"));\n\n    if (context !== selection) {\n      path = path.transition(context);\n      tick = tick.transition(context);\n      line = line.transition(context);\n      text = text.transition(context);\n\n      tickExit = tickExit.transition(context)\n          .attr(\"opacity\", epsilon)\n          .attr(\"transform\", function(d) { return isFinite(d = position(d)) ? transform(d) : this.getAttribute(\"transform\"); });\n\n      tickEnter\n          .attr(\"opacity\", epsilon)\n          .attr(\"transform\", function(d) { var p = this.parentNode.__axis; return transform(p && isFinite(p = p(d)) ? p : position(d)); });\n    }\n\n    tickExit.remove();\n\n    path\n        .attr(\"d\", orient === left || orient == right\n            ? \"M\" + k * tickSizeOuter + \",\" + range0 + \"H0.5V\" + range1 + \"H\" + k * tickSizeOuter\n            : \"M\" + range0 + \",\" + k * tickSizeOuter + \"V0.5H\" + range1 + \"V\" + k * tickSizeOuter);\n\n    tick\n        .attr(\"opacity\", 1)\n        .attr(\"transform\", function(d) { return transform(position(d)); });\n\n    line\n        .attr(x + \"2\", k * tickSizeInner);\n\n    text\n        .attr(x, k * spacing)\n        .text(format);\n\n    selection.filter(entering)\n        .attr(\"fill\", \"none\")\n        .attr(\"font-size\", 10)\n        .attr(\"font-family\", \"sans-serif\")\n        .attr(\"text-anchor\", orient === right ? \"start\" : orient === left ? \"end\" : \"middle\");\n\n    selection\n        .each(function() { this.__axis = position; });\n  }\n\n  axis.scale = function(_) {\n    return arguments.length ? (scale = _, axis) : scale;\n  };\n\n  axis.ticks = function() {\n    return tickArguments = slice$1.call(arguments), axis;\n  };\n\n  axis.tickArguments = function(_) {\n    return arguments.length ? (tickArguments = _ == null ? [] : slice$1.call(_), axis) : tickArguments.slice();\n  };\n\n  axis.tickValues = function(_) {\n    return arguments.length ? (tickValues = _ == null ? null : slice$1.call(_), axis) : tickValues && tickValues.slice();\n  };\n\n  axis.tickFormat = function(_) {\n    return arguments.length ? (tickFormat = _, axis) : tickFormat;\n  };\n\n  axis.tickSize = function(_) {\n    return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner;\n  };\n\n  axis.tickSizeInner = function(_) {\n    return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner;\n  };\n\n  axis.tickSizeOuter = function(_) {\n    return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter;\n  };\n\n  axis.tickPadding = function(_) {\n    return arguments.length ? (tickPadding = +_, axis) : tickPadding;\n  };\n\n  return axis;\n}\n\nfunction axisTop(scale) {\n  return axis(top, scale);\n}\n\nfunction axisRight(scale) {\n  return axis(right, scale);\n}\n\nfunction axisBottom(scale) {\n  return axis(bottom, scale);\n}\n\nfunction axisLeft(scale) {\n  return axis(left, scale);\n}\n\nvar noop = {value: function() {}};\n\nfunction dispatch() {\n  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {\n    if (!(t = arguments[i] + \"\") || (t in _)) throw new Error(\"illegal type: \" + t);\n    _[t] = [];\n  }\n  return new Dispatch(_);\n}\n\nfunction Dispatch(_) {\n  this._ = _;\n}\n\nfunction parseTypenames(typenames, types) {\n  return typenames.trim().split(/^|\\s+/).map(function(t) {\n    var name = \"\", i = t.indexOf(\".\");\n    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);\n    if (t && !types.hasOwnProperty(t)) throw new Error(\"unknown type: \" + t);\n    return {type: t, name: name};\n  });\n}\n\nDispatch.prototype = dispatch.prototype = {\n  constructor: Dispatch,\n  on: function(typename, callback) {\n    var _ = this._,\n        T = parseTypenames(typename + \"\", _),\n        t,\n        i = -1,\n        n = T.length;\n\n    // If no callback was specified, return the callback of the given type and name.\n    if (arguments.length < 2) {\n      while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;\n      return;\n    }\n\n    // If a type was specified, set the callback for the given type and name.\n    // Otherwise, if a null callback was specified, remove callbacks of the given name.\n    if (callback != null && typeof callback !== \"function\") throw new Error(\"invalid callback: \" + callback);\n    while (++i < n) {\n      if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);\n      else if (callback == null) for (t in _) _[t] = set(_[t], typename.name, null);\n    }\n\n    return this;\n  },\n  copy: function() {\n    var copy = {}, _ = this._;\n    for (var t in _) copy[t] = _[t].slice();\n    return new Dispatch(copy);\n  },\n  call: function(type, that) {\n    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];\n    if (!this._.hasOwnProperty(type)) throw new Error(\"unknown type: \" + type);\n    for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);\n  },\n  apply: function(type, that, args) {\n    if (!this._.hasOwnProperty(type)) throw new Error(\"unknown type: \" + type);\n    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);\n  }\n};\n\nfunction get(type, name) {\n  for (var i = 0, n = type.length, c; i < n; ++i) {\n    if ((c = type[i]).name === name) {\n      return c.value;\n    }\n  }\n}\n\nfunction set(type, name, callback) {\n  for (var i = 0, n = type.length; i < n; ++i) {\n    if (type[i].name === name) {\n      type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));\n      break;\n    }\n  }\n  if (callback != null) type.push({name: name, value: callback});\n  return type;\n}\n\nvar xhtml = \"http://www.w3.org/1999/xhtml\";\n\nvar namespaces = {\n  svg: \"http://www.w3.org/2000/svg\",\n  xhtml: xhtml,\n  xlink: \"http://www.w3.org/1999/xlink\",\n  xml: \"http://www.w3.org/XML/1998/namespace\",\n  xmlns: \"http://www.w3.org/2000/xmlns/\"\n};\n\nvar namespace = function(name) {\n  var prefix = name += \"\", i = prefix.indexOf(\":\");\n  if (i >= 0 && (prefix = name.slice(0, i)) !== \"xmlns\") name = name.slice(i + 1);\n  return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;\n};\n\nfunction creatorInherit(name) {\n  return function() {\n    var document = this.ownerDocument,\n        uri = this.namespaceURI;\n    return uri === xhtml && document.documentElement.namespaceURI === xhtml\n        ? document.createElement(name)\n        : document.createElementNS(uri, name);\n  };\n}\n\nfunction creatorFixed(fullname) {\n  return function() {\n    return this.ownerDocument.createElementNS(fullname.space, fullname.local);\n  };\n}\n\nvar creator = function(name) {\n  var fullname = namespace(name);\n  return (fullname.local\n      ? creatorFixed\n      : creatorInherit)(fullname);\n};\n\nvar nextId = 0;\n\nfunction local$1() {\n  return new Local;\n}\n\nfunction Local() {\n  this._ = \"@\" + (++nextId).toString(36);\n}\n\nLocal.prototype = local$1.prototype = {\n  constructor: Local,\n  get: function(node) {\n    var id = this._;\n    while (!(id in node)) if (!(node = node.parentNode)) return;\n    return node[id];\n  },\n  set: function(node, value) {\n    return node[this._] = value;\n  },\n  remove: function(node) {\n    return this._ in node && delete node[this._];\n  },\n  toString: function() {\n    return this._;\n  }\n};\n\nvar matcher = function(selector) {\n  return function() {\n    return this.matches(selector);\n  };\n};\n\nif (typeof document !== \"undefined\") {\n  var element = document.documentElement;\n  if (!element.matches) {\n    var vendorMatches = element.webkitMatchesSelector\n        || element.msMatchesSelector\n        || element.mozMatchesSelector\n        || element.oMatchesSelector;\n    matcher = function(selector) {\n      return function() {\n        return vendorMatches.call(this, selector);\n      };\n    };\n  }\n}\n\nvar matcher$1 = matcher;\n\nvar filterEvents = {};\n\nexports.event = null;\n\nif (typeof document !== \"undefined\") {\n  var element$1 = document.documentElement;\n  if (!(\"onmouseenter\" in element$1)) {\n    filterEvents = {mouseenter: \"mouseover\", mouseleave: \"mouseout\"};\n  }\n}\n\nfunction filterContextListener(listener, index, group) {\n  listener = contextListener(listener, index, group);\n  return function(event) {\n    var related = event.relatedTarget;\n    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {\n      listener.call(this, event);\n    }\n  };\n}\n\nfunction contextListener(listener, index, group) {\n  return function(event1) {\n    var event0 = exports.event; // Events can be reentrant (e.g., focus).\n    exports.event = event1;\n    try {\n      listener.call(this, this.__data__, index, group);\n    } finally {\n      exports.event = event0;\n    }\n  };\n}\n\nfunction parseTypenames$1(typenames) {\n  return typenames.trim().split(/^|\\s+/).map(function(t) {\n    var name = \"\", i = t.indexOf(\".\");\n    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);\n    return {type: t, name: name};\n  });\n}\n\nfunction onRemove(typename) {\n  return function() {\n    var on = this.__on;\n    if (!on) return;\n    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {\n      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {\n        this.removeEventListener(o.type, o.listener, o.capture);\n      } else {\n        on[++i] = o;\n      }\n    }\n    if (++i) on.length = i;\n    else delete this.__on;\n  };\n}\n\nfunction onAdd(typename, value, capture) {\n  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;\n  return function(d, i, group) {\n    var on = this.__on, o, listener = wrap(value, i, group);\n    if (on) for (var j = 0, m = on.length; j < m; ++j) {\n      if ((o = on[j]).type === typename.type && o.name === typename.name) {\n        this.removeEventListener(o.type, o.listener, o.capture);\n        this.addEventListener(o.type, o.listener = listener, o.capture = capture);\n        o.value = value;\n        return;\n      }\n    }\n    this.addEventListener(typename.type, listener, capture);\n    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};\n    if (!on) this.__on = [o];\n    else on.push(o);\n  };\n}\n\nvar selection_on = function(typename, value, capture) {\n  var typenames = parseTypenames$1(typename + \"\"), i, n = typenames.length, t;\n\n  if (arguments.length < 2) {\n    var on = this.node().__on;\n    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {\n      for (i = 0, o = on[j]; i < n; ++i) {\n        if ((t = typenames[i]).type === o.type && t.name === o.name) {\n          return o.value;\n        }\n      }\n    }\n    return;\n  }\n\n  on = value ? onAdd : onRemove;\n  if (capture == null) capture = false;\n  for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));\n  return this;\n};\n\nfunction customEvent(event1, listener, that, args) {\n  var event0 = exports.event;\n  event1.sourceEvent = exports.event;\n  exports.event = event1;\n  try {\n    return listener.apply(that, args);\n  } finally {\n    exports.event = event0;\n  }\n}\n\nvar sourceEvent = function() {\n  var current = exports.event, source;\n  while (source = current.sourceEvent) current = source;\n  return current;\n};\n\nvar point = function(node, event) {\n  var svg = node.ownerSVGElement || node;\n\n  if (svg.createSVGPoint) {\n    var point = svg.createSVGPoint();\n    point.x = event.clientX, point.y = event.clientY;\n    point = point.matrixTransform(node.getScreenCTM().inverse());\n    return [point.x, point.y];\n  }\n\n  var rect = node.getBoundingClientRect();\n  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];\n};\n\nvar mouse = function(node) {\n  var event = sourceEvent();\n  if (event.changedTouches) event = event.changedTouches[0];\n  return point(node, event);\n};\n\nfunction none() {}\n\nvar selector = function(selector) {\n  return selector == null ? none : function() {\n    return this.querySelector(selector);\n  };\n};\n\nvar selection_select = function(select) {\n  if (typeof select !== \"function\") select = selector(select);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {\n      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {\n        if (\"__data__\" in node) subnode.__data__ = node.__data__;\n        subgroup[i] = subnode;\n      }\n    }\n  }\n\n  return new Selection(subgroups, this._parents);\n};\n\nfunction empty$1() {\n  return [];\n}\n\nvar selectorAll = function(selector) {\n  return selector == null ? empty$1 : function() {\n    return this.querySelectorAll(selector);\n  };\n};\n\nvar selection_selectAll = function(select) {\n  if (typeof select !== \"function\") select = selectorAll(select);\n\n  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        subgroups.push(select.call(node, node.__data__, i, group));\n        parents.push(node);\n      }\n    }\n  }\n\n  return new Selection(subgroups, parents);\n};\n\nvar selection_filter = function(match) {\n  if (typeof match !== \"function\") match = matcher$1(match);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {\n      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {\n        subgroup.push(node);\n      }\n    }\n  }\n\n  return new Selection(subgroups, this._parents);\n};\n\nvar sparse = function(update) {\n  return new Array(update.length);\n};\n\nvar selection_enter = function() {\n  return new Selection(this._enter || this._groups.map(sparse), this._parents);\n};\n\nfunction EnterNode(parent, datum) {\n  this.ownerDocument = parent.ownerDocument;\n  this.namespaceURI = parent.namespaceURI;\n  this._next = null;\n  this._parent = parent;\n  this.__data__ = datum;\n}\n\nEnterNode.prototype = {\n  constructor: EnterNode,\n  appendChild: function(child) { return this._parent.insertBefore(child, this._next); },\n  insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },\n  querySelector: function(selector) { return this._parent.querySelector(selector); },\n  querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }\n};\n\nvar constant$1 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar keyPrefix = \"$\"; // Protect against keys like “__proto__”.\n\nfunction bindIndex(parent, group, enter, update, exit, data) {\n  var i = 0,\n      node,\n      groupLength = group.length,\n      dataLength = data.length;\n\n  // Put any non-null nodes that fit into update.\n  // Put any null nodes into enter.\n  // Put any remaining data into enter.\n  for (; i < dataLength; ++i) {\n    if (node = group[i]) {\n      node.__data__ = data[i];\n      update[i] = node;\n    } else {\n      enter[i] = new EnterNode(parent, data[i]);\n    }\n  }\n\n  // Put any non-null nodes that don’t fit into exit.\n  for (; i < groupLength; ++i) {\n    if (node = group[i]) {\n      exit[i] = node;\n    }\n  }\n}\n\nfunction bindKey(parent, group, enter, update, exit, data, key) {\n  var i,\n      node,\n      nodeByKeyValue = {},\n      groupLength = group.length,\n      dataLength = data.length,\n      keyValues = new Array(groupLength),\n      keyValue;\n\n  // Compute the key for each node.\n  // If multiple nodes have the same key, the duplicates are added to exit.\n  for (i = 0; i < groupLength; ++i) {\n    if (node = group[i]) {\n      keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);\n      if (keyValue in nodeByKeyValue) {\n        exit[i] = node;\n      } else {\n        nodeByKeyValue[keyValue] = node;\n      }\n    }\n  }\n\n  // Compute the key for each datum.\n  // If there a node associated with this key, join and add it to update.\n  // If there is not (or the key is a duplicate), add it to enter.\n  for (i = 0; i < dataLength; ++i) {\n    keyValue = keyPrefix + key.call(parent, data[i], i, data);\n    if (node = nodeByKeyValue[keyValue]) {\n      update[i] = node;\n      node.__data__ = data[i];\n      nodeByKeyValue[keyValue] = null;\n    } else {\n      enter[i] = new EnterNode(parent, data[i]);\n    }\n  }\n\n  // Add any remaining nodes that were not bound to data to exit.\n  for (i = 0; i < groupLength; ++i) {\n    if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {\n      exit[i] = node;\n    }\n  }\n}\n\nvar selection_data = function(value, key) {\n  if (!value) {\n    data = new Array(this.size()), j = -1;\n    this.each(function(d) { data[++j] = d; });\n    return data;\n  }\n\n  var bind = key ? bindKey : bindIndex,\n      parents = this._parents,\n      groups = this._groups;\n\n  if (typeof value !== \"function\") value = constant$1(value);\n\n  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {\n    var parent = parents[j],\n        group = groups[j],\n        groupLength = group.length,\n        data = value.call(parent, parent && parent.__data__, j, parents),\n        dataLength = data.length,\n        enterGroup = enter[j] = new Array(dataLength),\n        updateGroup = update[j] = new Array(dataLength),\n        exitGroup = exit[j] = new Array(groupLength);\n\n    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);\n\n    // Now connect the enter nodes to their following update node, such that\n    // appendChild can insert the materialized enter node before this node,\n    // rather than at the end of the parent node.\n    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {\n      if (previous = enterGroup[i0]) {\n        if (i0 >= i1) i1 = i0 + 1;\n        while (!(next = updateGroup[i1]) && ++i1 < dataLength);\n        previous._next = next || null;\n      }\n    }\n  }\n\n  update = new Selection(update, parents);\n  update._enter = enter;\n  update._exit = exit;\n  return update;\n};\n\nvar selection_exit = function() {\n  return new Selection(this._exit || this._groups.map(sparse), this._parents);\n};\n\nvar selection_merge = function(selection) {\n\n  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {\n    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {\n      if (node = group0[i] || group1[i]) {\n        merge[i] = node;\n      }\n    }\n  }\n\n  for (; j < m0; ++j) {\n    merges[j] = groups0[j];\n  }\n\n  return new Selection(merges, this._parents);\n};\n\nvar selection_order = function() {\n\n  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {\n    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {\n      if (node = group[i]) {\n        if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);\n        next = node;\n      }\n    }\n  }\n\n  return this;\n};\n\nvar selection_sort = function(compare) {\n  if (!compare) compare = ascending$1;\n\n  function compareNode(a, b) {\n    return a && b ? compare(a.__data__, b.__data__) : !a - !b;\n  }\n\n  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        sortgroup[i] = node;\n      }\n    }\n    sortgroup.sort(compareNode);\n  }\n\n  return new Selection(sortgroups, this._parents).order();\n};\n\nfunction ascending$1(a, b) {\n  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;\n}\n\nvar selection_call = function() {\n  var callback = arguments[0];\n  arguments[0] = this;\n  callback.apply(null, arguments);\n  return this;\n};\n\nvar selection_nodes = function() {\n  var nodes = new Array(this.size()), i = -1;\n  this.each(function() { nodes[++i] = this; });\n  return nodes;\n};\n\nvar selection_node = function() {\n\n  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {\n    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {\n      var node = group[i];\n      if (node) return node;\n    }\n  }\n\n  return null;\n};\n\nvar selection_size = function() {\n  var size = 0;\n  this.each(function() { ++size; });\n  return size;\n};\n\nvar selection_empty = function() {\n  return !this.node();\n};\n\nvar selection_each = function(callback) {\n\n  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {\n    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {\n      if (node = group[i]) callback.call(node, node.__data__, i, group);\n    }\n  }\n\n  return this;\n};\n\nfunction attrRemove(name) {\n  return function() {\n    this.removeAttribute(name);\n  };\n}\n\nfunction attrRemoveNS(fullname) {\n  return function() {\n    this.removeAttributeNS(fullname.space, fullname.local);\n  };\n}\n\nfunction attrConstant(name, value) {\n  return function() {\n    this.setAttribute(name, value);\n  };\n}\n\nfunction attrConstantNS(fullname, value) {\n  return function() {\n    this.setAttributeNS(fullname.space, fullname.local, value);\n  };\n}\n\nfunction attrFunction(name, value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) this.removeAttribute(name);\n    else this.setAttribute(name, v);\n  };\n}\n\nfunction attrFunctionNS(fullname, value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) this.removeAttributeNS(fullname.space, fullname.local);\n    else this.setAttributeNS(fullname.space, fullname.local, v);\n  };\n}\n\nvar selection_attr = function(name, value) {\n  var fullname = namespace(name);\n\n  if (arguments.length < 2) {\n    var node = this.node();\n    return fullname.local\n        ? node.getAttributeNS(fullname.space, fullname.local)\n        : node.getAttribute(fullname);\n  }\n\n  return this.each((value == null\n      ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === \"function\"\n      ? (fullname.local ? attrFunctionNS : attrFunction)\n      : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));\n};\n\nvar window = function(node) {\n  return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node\n      || (node.document && node) // node is a Window\n      || node.defaultView; // node is a Document\n};\n\nfunction styleRemove(name) {\n  return function() {\n    this.style.removeProperty(name);\n  };\n}\n\nfunction styleConstant(name, value, priority) {\n  return function() {\n    this.style.setProperty(name, value, priority);\n  };\n}\n\nfunction styleFunction(name, value, priority) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) this.style.removeProperty(name);\n    else this.style.setProperty(name, v, priority);\n  };\n}\n\nvar selection_style = function(name, value, priority) {\n  var node;\n  return arguments.length > 1\n      ? this.each((value == null\n            ? styleRemove : typeof value === \"function\"\n            ? styleFunction\n            : styleConstant)(name, value, priority == null ? \"\" : priority))\n      : window(node = this.node())\n          .getComputedStyle(node, null)\n          .getPropertyValue(name);\n};\n\nfunction propertyRemove(name) {\n  return function() {\n    delete this[name];\n  };\n}\n\nfunction propertyConstant(name, value) {\n  return function() {\n    this[name] = value;\n  };\n}\n\nfunction propertyFunction(name, value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    if (v == null) delete this[name];\n    else this[name] = v;\n  };\n}\n\nvar selection_property = function(name, value) {\n  return arguments.length > 1\n      ? this.each((value == null\n          ? propertyRemove : typeof value === \"function\"\n          ? propertyFunction\n          : propertyConstant)(name, value))\n      : this.node()[name];\n};\n\nfunction classArray(string) {\n  return string.trim().split(/^|\\s+/);\n}\n\nfunction classList(node) {\n  return node.classList || new ClassList(node);\n}\n\nfunction ClassList(node) {\n  this._node = node;\n  this._names = classArray(node.getAttribute(\"class\") || \"\");\n}\n\nClassList.prototype = {\n  add: function(name) {\n    var i = this._names.indexOf(name);\n    if (i < 0) {\n      this._names.push(name);\n      this._node.setAttribute(\"class\", this._names.join(\" \"));\n    }\n  },\n  remove: function(name) {\n    var i = this._names.indexOf(name);\n    if (i >= 0) {\n      this._names.splice(i, 1);\n      this._node.setAttribute(\"class\", this._names.join(\" \"));\n    }\n  },\n  contains: function(name) {\n    return this._names.indexOf(name) >= 0;\n  }\n};\n\nfunction classedAdd(node, names) {\n  var list = classList(node), i = -1, n = names.length;\n  while (++i < n) list.add(names[i]);\n}\n\nfunction classedRemove(node, names) {\n  var list = classList(node), i = -1, n = names.length;\n  while (++i < n) list.remove(names[i]);\n}\n\nfunction classedTrue(names) {\n  return function() {\n    classedAdd(this, names);\n  };\n}\n\nfunction classedFalse(names) {\n  return function() {\n    classedRemove(this, names);\n  };\n}\n\nfunction classedFunction(names, value) {\n  return function() {\n    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);\n  };\n}\n\nvar selection_classed = function(name, value) {\n  var names = classArray(name + \"\");\n\n  if (arguments.length < 2) {\n    var list = classList(this.node()), i = -1, n = names.length;\n    while (++i < n) if (!list.contains(names[i])) return false;\n    return true;\n  }\n\n  return this.each((typeof value === \"function\"\n      ? classedFunction : value\n      ? classedTrue\n      : classedFalse)(names, value));\n};\n\nfunction textRemove() {\n  this.textContent = \"\";\n}\n\nfunction textConstant(value) {\n  return function() {\n    this.textContent = value;\n  };\n}\n\nfunction textFunction(value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    this.textContent = v == null ? \"\" : v;\n  };\n}\n\nvar selection_text = function(value) {\n  return arguments.length\n      ? this.each(value == null\n          ? textRemove : (typeof value === \"function\"\n          ? textFunction\n          : textConstant)(value))\n      : this.node().textContent;\n};\n\nfunction htmlRemove() {\n  this.innerHTML = \"\";\n}\n\nfunction htmlConstant(value) {\n  return function() {\n    this.innerHTML = value;\n  };\n}\n\nfunction htmlFunction(value) {\n  return function() {\n    var v = value.apply(this, arguments);\n    this.innerHTML = v == null ? \"\" : v;\n  };\n}\n\nvar selection_html = function(value) {\n  return arguments.length\n      ? this.each(value == null\n          ? htmlRemove : (typeof value === \"function\"\n          ? htmlFunction\n          : htmlConstant)(value))\n      : this.node().innerHTML;\n};\n\nfunction raise() {\n  if (this.nextSibling) this.parentNode.appendChild(this);\n}\n\nvar selection_raise = function() {\n  return this.each(raise);\n};\n\nfunction lower() {\n  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);\n}\n\nvar selection_lower = function() {\n  return this.each(lower);\n};\n\nvar selection_append = function(name) {\n  var create = typeof name === \"function\" ? name : creator(name);\n  return this.select(function() {\n    return this.appendChild(create.apply(this, arguments));\n  });\n};\n\nfunction constantNull() {\n  return null;\n}\n\nvar selection_insert = function(name, before) {\n  var create = typeof name === \"function\" ? name : creator(name),\n      select = before == null ? constantNull : typeof before === \"function\" ? before : selector(before);\n  return this.select(function() {\n    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);\n  });\n};\n\nfunction remove() {\n  var parent = this.parentNode;\n  if (parent) parent.removeChild(this);\n}\n\nvar selection_remove = function() {\n  return this.each(remove);\n};\n\nvar selection_datum = function(value) {\n  return arguments.length\n      ? this.property(\"__data__\", value)\n      : this.node().__data__;\n};\n\nfunction dispatchEvent(node, type, params) {\n  var window$$1 = window(node),\n      event = window$$1.CustomEvent;\n\n  if (event) {\n    event = new event(type, params);\n  } else {\n    event = window$$1.document.createEvent(\"Event\");\n    if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;\n    else event.initEvent(type, false, false);\n  }\n\n  node.dispatchEvent(event);\n}\n\nfunction dispatchConstant(type, params) {\n  return function() {\n    return dispatchEvent(this, type, params);\n  };\n}\n\nfunction dispatchFunction(type, params) {\n  return function() {\n    return dispatchEvent(this, type, params.apply(this, arguments));\n  };\n}\n\nvar selection_dispatch = function(type, params) {\n  return this.each((typeof params === \"function\"\n      ? dispatchFunction\n      : dispatchConstant)(type, params));\n};\n\nvar root = [null];\n\nfunction Selection(groups, parents) {\n  this._groups = groups;\n  this._parents = parents;\n}\n\nfunction selection() {\n  return new Selection([[document.documentElement]], root);\n}\n\nSelection.prototype = selection.prototype = {\n  constructor: Selection,\n  select: selection_select,\n  selectAll: selection_selectAll,\n  filter: selection_filter,\n  data: selection_data,\n  enter: selection_enter,\n  exit: selection_exit,\n  merge: selection_merge,\n  order: selection_order,\n  sort: selection_sort,\n  call: selection_call,\n  nodes: selection_nodes,\n  node: selection_node,\n  size: selection_size,\n  empty: selection_empty,\n  each: selection_each,\n  attr: selection_attr,\n  style: selection_style,\n  property: selection_property,\n  classed: selection_classed,\n  text: selection_text,\n  html: selection_html,\n  raise: selection_raise,\n  lower: selection_lower,\n  append: selection_append,\n  insert: selection_insert,\n  remove: selection_remove,\n  datum: selection_datum,\n  on: selection_on,\n  dispatch: selection_dispatch\n};\n\nvar select = function(selector) {\n  return typeof selector === \"string\"\n      ? new Selection([[document.querySelector(selector)]], [document.documentElement])\n      : new Selection([[selector]], root);\n};\n\nvar selectAll = function(selector) {\n  return typeof selector === \"string\"\n      ? new Selection([document.querySelectorAll(selector)], [document.documentElement])\n      : new Selection([selector == null ? [] : selector], root);\n};\n\nvar touch = function(node, touches, identifier) {\n  if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;\n\n  for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {\n    if ((touch = touches[i]).identifier === identifier) {\n      return point(node, touch);\n    }\n  }\n\n  return null;\n};\n\nvar touches = function(node, touches) {\n  if (touches == null) touches = sourceEvent().touches;\n\n  for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {\n    points[i] = point(node, touches[i]);\n  }\n\n  return points;\n};\n\nfunction nopropagation() {\n  exports.event.stopImmediatePropagation();\n}\n\nvar noevent = function() {\n  exports.event.preventDefault();\n  exports.event.stopImmediatePropagation();\n};\n\nvar dragDisable = function(view) {\n  var root = view.document.documentElement,\n      selection$$1 = select(view).on(\"dragstart.drag\", noevent, true);\n  if (\"onselectstart\" in root) {\n    selection$$1.on(\"selectstart.drag\", noevent, true);\n  } else {\n    root.__noselect = root.style.MozUserSelect;\n    root.style.MozUserSelect = \"none\";\n  }\n};\n\nfunction yesdrag(view, noclick) {\n  var root = view.document.documentElement,\n      selection$$1 = select(view).on(\"dragstart.drag\", null);\n  if (noclick) {\n    selection$$1.on(\"click.drag\", noevent, true);\n    setTimeout(function() { selection$$1.on(\"click.drag\", null); }, 0);\n  }\n  if (\"onselectstart\" in root) {\n    selection$$1.on(\"selectstart.drag\", null);\n  } else {\n    root.style.MozUserSelect = root.__noselect;\n    delete root.__noselect;\n  }\n}\n\nvar constant$2 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nfunction DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {\n  this.target = target;\n  this.type = type;\n  this.subject = subject;\n  this.identifier = id;\n  this.active = active;\n  this.x = x;\n  this.y = y;\n  this.dx = dx;\n  this.dy = dy;\n  this._ = dispatch;\n}\n\nDragEvent.prototype.on = function() {\n  var value = this._.on.apply(this._, arguments);\n  return value === this._ ? this : value;\n};\n\n// Ignore right-click, since that should open the context menu.\nfunction defaultFilter$1() {\n  return !exports.event.button;\n}\n\nfunction defaultContainer() {\n  return this.parentNode;\n}\n\nfunction defaultSubject(d) {\n  return d == null ? {x: exports.event.x, y: exports.event.y} : d;\n}\n\nvar drag = function() {\n  var filter = defaultFilter$1,\n      container = defaultContainer,\n      subject = defaultSubject,\n      gestures = {},\n      listeners = dispatch(\"start\", \"drag\", \"end\"),\n      active = 0,\n      mousemoving,\n      touchending;\n\n  function drag(selection$$1) {\n    selection$$1\n        .on(\"mousedown.drag\", mousedowned)\n        .on(\"touchstart.drag\", touchstarted)\n        .on(\"touchmove.drag\", touchmoved)\n        .on(\"touchend.drag touchcancel.drag\", touchended)\n        .style(\"-webkit-tap-highlight-color\", \"rgba(0,0,0,0)\");\n  }\n\n  function mousedowned() {\n    if (touchending || !filter.apply(this, arguments)) return;\n    var gesture = beforestart(\"mouse\", container.apply(this, arguments), mouse, this, arguments);\n    if (!gesture) return;\n    select(exports.event.view).on(\"mousemove.drag\", mousemoved, true).on(\"mouseup.drag\", mouseupped, true);\n    dragDisable(exports.event.view);\n    nopropagation();\n    mousemoving = false;\n    gesture(\"start\");\n  }\n\n  function mousemoved() {\n    noevent();\n    mousemoving = true;\n    gestures.mouse(\"drag\");\n  }\n\n  function mouseupped() {\n    select(exports.event.view).on(\"mousemove.drag mouseup.drag\", null);\n    yesdrag(exports.event.view, mousemoving);\n    noevent();\n    gestures.mouse(\"end\");\n  }\n\n  function touchstarted() {\n    if (!filter.apply(this, arguments)) return;\n    var touches$$1 = exports.event.changedTouches,\n        c = container.apply(this, arguments),\n        n = touches$$1.length, i, gesture;\n\n    for (i = 0; i < n; ++i) {\n      if (gesture = beforestart(touches$$1[i].identifier, c, touch, this, arguments)) {\n        nopropagation();\n        gesture(\"start\");\n      }\n    }\n  }\n\n  function touchmoved() {\n    var touches$$1 = exports.event.changedTouches,\n        n = touches$$1.length, i, gesture;\n\n    for (i = 0; i < n; ++i) {\n      if (gesture = gestures[touches$$1[i].identifier]) {\n        noevent();\n        gesture(\"drag\");\n      }\n    }\n  }\n\n  function touchended() {\n    var touches$$1 = exports.event.changedTouches,\n        n = touches$$1.length, i, gesture;\n\n    if (touchending) clearTimeout(touchending);\n    touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!\n    for (i = 0; i < n; ++i) {\n      if (gesture = gestures[touches$$1[i].identifier]) {\n        nopropagation();\n        gesture(\"end\");\n      }\n    }\n  }\n\n  function beforestart(id, container, point, that, args) {\n    var p = point(container, id), s, dx, dy,\n        sublisteners = listeners.copy();\n\n    if (!customEvent(new DragEvent(drag, \"beforestart\", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {\n      if ((exports.event.subject = s = subject.apply(that, args)) == null) return false;\n      dx = s.x - p[0] || 0;\n      dy = s.y - p[1] || 0;\n      return true;\n    })) return;\n\n    return function gesture(type) {\n      var p0 = p, n;\n      switch (type) {\n        case \"start\": gestures[id] = gesture, n = active++; break;\n        case \"end\": delete gestures[id], --active; // nobreak\n        case \"drag\": p = point(container, id), n = active; break;\n      }\n      customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);\n    };\n  }\n\n  drag.filter = function(_) {\n    return arguments.length ? (filter = typeof _ === \"function\" ? _ : constant$2(!!_), drag) : filter;\n  };\n\n  drag.container = function(_) {\n    return arguments.length ? (container = typeof _ === \"function\" ? _ : constant$2(_), drag) : container;\n  };\n\n  drag.subject = function(_) {\n    return arguments.length ? (subject = typeof _ === \"function\" ? _ : constant$2(_), drag) : subject;\n  };\n\n  drag.on = function() {\n    var value = listeners.on.apply(listeners, arguments);\n    return value === listeners ? drag : value;\n  };\n\n  return drag;\n};\n\nvar define = function(constructor, factory, prototype) {\n  constructor.prototype = factory.prototype = prototype;\n  prototype.constructor = constructor;\n};\n\nfunction extend(parent, definition) {\n  var prototype = Object.create(parent.prototype);\n  for (var key in definition) prototype[key] = definition[key];\n  return prototype;\n}\n\nfunction Color() {}\n\nvar darker = 0.7;\nvar brighter = 1 / darker;\n\nvar reI = \"\\\\s*([+-]?\\\\d+)\\\\s*\";\nvar reN = \"\\\\s*([+-]?\\\\d*\\\\.?\\\\d+(?:[eE][+-]?\\\\d+)?)\\\\s*\";\nvar reP = \"\\\\s*([+-]?\\\\d*\\\\.?\\\\d+(?:[eE][+-]?\\\\d+)?)%\\\\s*\";\nvar reHex3 = /^#([0-9a-f]{3})$/;\nvar reHex6 = /^#([0-9a-f]{6})$/;\nvar reRgbInteger = new RegExp(\"^rgb\\\\(\" + [reI, reI, reI] + \"\\\\)$\");\nvar reRgbPercent = new RegExp(\"^rgb\\\\(\" + [reP, reP, reP] + \"\\\\)$\");\nvar reRgbaInteger = new RegExp(\"^rgba\\\\(\" + [reI, reI, reI, reN] + \"\\\\)$\");\nvar reRgbaPercent = new RegExp(\"^rgba\\\\(\" + [reP, reP, reP, reN] + \"\\\\)$\");\nvar reHslPercent = new RegExp(\"^hsl\\\\(\" + [reN, reP, reP] + \"\\\\)$\");\nvar reHslaPercent = new RegExp(\"^hsla\\\\(\" + [reN, reP, reP, reN] + \"\\\\)$\");\n\nvar named = {\n  aliceblue: 0xf0f8ff,\n  antiquewhite: 0xfaebd7,\n  aqua: 0x00ffff,\n  aquamarine: 0x7fffd4,\n  azure: 0xf0ffff,\n  beige: 0xf5f5dc,\n  bisque: 0xffe4c4,\n  black: 0x000000,\n  blanchedalmond: 0xffebcd,\n  blue: 0x0000ff,\n  blueviolet: 0x8a2be2,\n  brown: 0xa52a2a,\n  burlywood: 0xdeb887,\n  cadetblue: 0x5f9ea0,\n  chartreuse: 0x7fff00,\n  chocolate: 0xd2691e,\n  coral: 0xff7f50,\n  cornflowerblue: 0x6495ed,\n  cornsilk: 0xfff8dc,\n  crimson: 0xdc143c,\n  cyan: 0x00ffff,\n  darkblue: 0x00008b,\n  darkcyan: 0x008b8b,\n  darkgoldenrod: 0xb8860b,\n  darkgray: 0xa9a9a9,\n  darkgreen: 0x006400,\n  darkgrey: 0xa9a9a9,\n  darkkhaki: 0xbdb76b,\n  darkmagenta: 0x8b008b,\n  darkolivegreen: 0x556b2f,\n  darkorange: 0xff8c00,\n  darkorchid: 0x9932cc,\n  darkred: 0x8b0000,\n  darksalmon: 0xe9967a,\n  darkseagreen: 0x8fbc8f,\n  darkslateblue: 0x483d8b,\n  darkslategray: 0x2f4f4f,\n  darkslategrey: 0x2f4f4f,\n  darkturquoise: 0x00ced1,\n  darkviolet: 0x9400d3,\n  deeppink: 0xff1493,\n  deepskyblue: 0x00bfff,\n  dimgray: 0x696969,\n  dimgrey: 0x696969,\n  dodgerblue: 0x1e90ff,\n  firebrick: 0xb22222,\n  floralwhite: 0xfffaf0,\n  forestgreen: 0x228b22,\n  fuchsia: 0xff00ff,\n  gainsboro: 0xdcdcdc,\n  ghostwhite: 0xf8f8ff,\n  gold: 0xffd700,\n  goldenrod: 0xdaa520,\n  gray: 0x808080,\n  green: 0x008000,\n  greenyellow: 0xadff2f,\n  grey: 0x808080,\n  honeydew: 0xf0fff0,\n  hotpink: 0xff69b4,\n  indianred: 0xcd5c5c,\n  indigo: 0x4b0082,\n  ivory: 0xfffff0,\n  khaki: 0xf0e68c,\n  lavender: 0xe6e6fa,\n  lavenderblush: 0xfff0f5,\n  lawngreen: 0x7cfc00,\n  lemonchiffon: 0xfffacd,\n  lightblue: 0xadd8e6,\n  lightcoral: 0xf08080,\n  lightcyan: 0xe0ffff,\n  lightgoldenrodyellow: 0xfafad2,\n  lightgray: 0xd3d3d3,\n  lightgreen: 0x90ee90,\n  lightgrey: 0xd3d3d3,\n  lightpink: 0xffb6c1,\n  lightsalmon: 0xffa07a,\n  lightseagreen: 0x20b2aa,\n  lightskyblue: 0x87cefa,\n  lightslategray: 0x778899,\n  lightslategrey: 0x778899,\n  lightsteelblue: 0xb0c4de,\n  lightyellow: 0xffffe0,\n  lime: 0x00ff00,\n  limegreen: 0x32cd32,\n  linen: 0xfaf0e6,\n  magenta: 0xff00ff,\n  maroon: 0x800000,\n  mediumaquamarine: 0x66cdaa,\n  mediumblue: 0x0000cd,\n  mediumorchid: 0xba55d3,\n  mediumpurple: 0x9370db,\n  mediumseagreen: 0x3cb371,\n  mediumslateblue: 0x7b68ee,\n  mediumspringgreen: 0x00fa9a,\n  mediumturquoise: 0x48d1cc,\n  mediumvioletred: 0xc71585,\n  midnightblue: 0x191970,\n  mintcream: 0xf5fffa,\n  mistyrose: 0xffe4e1,\n  moccasin: 0xffe4b5,\n  navajowhite: 0xffdead,\n  navy: 0x000080,\n  oldlace: 0xfdf5e6,\n  olive: 0x808000,\n  olivedrab: 0x6b8e23,\n  orange: 0xffa500,\n  orangered: 0xff4500,\n  orchid: 0xda70d6,\n  palegoldenrod: 0xeee8aa,\n  palegreen: 0x98fb98,\n  paleturquoise: 0xafeeee,\n  palevioletred: 0xdb7093,\n  papayawhip: 0xffefd5,\n  peachpuff: 0xffdab9,\n  peru: 0xcd853f,\n  pink: 0xffc0cb,\n  plum: 0xdda0dd,\n  powderblue: 0xb0e0e6,\n  purple: 0x800080,\n  rebeccapurple: 0x663399,\n  red: 0xff0000,\n  rosybrown: 0xbc8f8f,\n  royalblue: 0x4169e1,\n  saddlebrown: 0x8b4513,\n  salmon: 0xfa8072,\n  sandybrown: 0xf4a460,\n  seagreen: 0x2e8b57,\n  seashell: 0xfff5ee,\n  sienna: 0xa0522d,\n  silver: 0xc0c0c0,\n  skyblue: 0x87ceeb,\n  slateblue: 0x6a5acd,\n  slategray: 0x708090,\n  slategrey: 0x708090,\n  snow: 0xfffafa,\n  springgreen: 0x00ff7f,\n  steelblue: 0x4682b4,\n  tan: 0xd2b48c,\n  teal: 0x008080,\n  thistle: 0xd8bfd8,\n  tomato: 0xff6347,\n  turquoise: 0x40e0d0,\n  violet: 0xee82ee,\n  wheat: 0xf5deb3,\n  white: 0xffffff,\n  whitesmoke: 0xf5f5f5,\n  yellow: 0xffff00,\n  yellowgreen: 0x9acd32\n};\n\ndefine(Color, color, {\n  displayable: function() {\n    return this.rgb().displayable();\n  },\n  toString: function() {\n    return this.rgb() + \"\";\n  }\n});\n\nfunction color(format) {\n  var m;\n  format = (format + \"\").trim().toLowerCase();\n  return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00\n      : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000\n      : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)\n      : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)\n      : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)\n      : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)\n      : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)\n      : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)\n      : named.hasOwnProperty(format) ? rgbn(named[format])\n      : format === \"transparent\" ? new Rgb(NaN, NaN, NaN, 0)\n      : null;\n}\n\nfunction rgbn(n) {\n  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);\n}\n\nfunction rgba(r, g, b, a) {\n  if (a <= 0) r = g = b = NaN;\n  return new Rgb(r, g, b, a);\n}\n\nfunction rgbConvert(o) {\n  if (!(o instanceof Color)) o = color(o);\n  if (!o) return new Rgb;\n  o = o.rgb();\n  return new Rgb(o.r, o.g, o.b, o.opacity);\n}\n\nfunction rgb(r, g, b, opacity) {\n  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);\n}\n\nfunction Rgb(r, g, b, opacity) {\n  this.r = +r;\n  this.g = +g;\n  this.b = +b;\n  this.opacity = +opacity;\n}\n\ndefine(Rgb, rgb, extend(Color, {\n  brighter: function(k) {\n    k = k == null ? brighter : Math.pow(brighter, k);\n    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);\n  },\n  darker: function(k) {\n    k = k == null ? darker : Math.pow(darker, k);\n    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);\n  },\n  rgb: function() {\n    return this;\n  },\n  displayable: function() {\n    return (0 <= this.r && this.r <= 255)\n        && (0 <= this.g && this.g <= 255)\n        && (0 <= this.b && this.b <= 255)\n        && (0 <= this.opacity && this.opacity <= 1);\n  },\n  toString: function() {\n    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));\n    return (a === 1 ? \"rgb(\" : \"rgba(\")\n        + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + \", \"\n        + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + \", \"\n        + Math.max(0, Math.min(255, Math.round(this.b) || 0))\n        + (a === 1 ? \")\" : \", \" + a + \")\");\n  }\n}));\n\nfunction hsla(h, s, l, a) {\n  if (a <= 0) h = s = l = NaN;\n  else if (l <= 0 || l >= 1) h = s = NaN;\n  else if (s <= 0) h = NaN;\n  return new Hsl(h, s, l, a);\n}\n\nfunction hslConvert(o) {\n  if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);\n  if (!(o instanceof Color)) o = color(o);\n  if (!o) return new Hsl;\n  if (o instanceof Hsl) return o;\n  o = o.rgb();\n  var r = o.r / 255,\n      g = o.g / 255,\n      b = o.b / 255,\n      min = Math.min(r, g, b),\n      max = Math.max(r, g, b),\n      h = NaN,\n      s = max - min,\n      l = (max + min) / 2;\n  if (s) {\n    if (r === max) h = (g - b) / s + (g < b) * 6;\n    else if (g === max) h = (b - r) / s + 2;\n    else h = (r - g) / s + 4;\n    s /= l < 0.5 ? max + min : 2 - max - min;\n    h *= 60;\n  } else {\n    s = l > 0 && l < 1 ? 0 : h;\n  }\n  return new Hsl(h, s, l, o.opacity);\n}\n\nfunction hsl(h, s, l, opacity) {\n  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);\n}\n\nfunction Hsl(h, s, l, opacity) {\n  this.h = +h;\n  this.s = +s;\n  this.l = +l;\n  this.opacity = +opacity;\n}\n\ndefine(Hsl, hsl, extend(Color, {\n  brighter: function(k) {\n    k = k == null ? brighter : Math.pow(brighter, k);\n    return new Hsl(this.h, this.s, this.l * k, this.opacity);\n  },\n  darker: function(k) {\n    k = k == null ? darker : Math.pow(darker, k);\n    return new Hsl(this.h, this.s, this.l * k, this.opacity);\n  },\n  rgb: function() {\n    var h = this.h % 360 + (this.h < 0) * 360,\n        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,\n        l = this.l,\n        m2 = l + (l < 0.5 ? l : 1 - l) * s,\n        m1 = 2 * l - m2;\n    return new Rgb(\n      hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),\n      hsl2rgb(h, m1, m2),\n      hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),\n      this.opacity\n    );\n  },\n  displayable: function() {\n    return (0 <= this.s && this.s <= 1 || isNaN(this.s))\n        && (0 <= this.l && this.l <= 1)\n        && (0 <= this.opacity && this.opacity <= 1);\n  }\n}));\n\n/* From FvD 13.37, CSS Color Module Level 3 */\nfunction hsl2rgb(h, m1, m2) {\n  return (h < 60 ? m1 + (m2 - m1) * h / 60\n      : h < 180 ? m2\n      : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60\n      : m1) * 255;\n}\n\nvar deg2rad = Math.PI / 180;\nvar rad2deg = 180 / Math.PI;\n\nvar Kn = 18;\nvar Xn = 0.950470;\nvar Yn = 1;\nvar Zn = 1.088830;\nvar t0 = 4 / 29;\nvar t1 = 6 / 29;\nvar t2 = 3 * t1 * t1;\nvar t3 = t1 * t1 * t1;\n\nfunction labConvert(o) {\n  if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);\n  if (o instanceof Hcl) {\n    var h = o.h * deg2rad;\n    return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);\n  }\n  if (!(o instanceof Rgb)) o = rgbConvert(o);\n  var b = rgb2xyz(o.r),\n      a = rgb2xyz(o.g),\n      l = rgb2xyz(o.b),\n      x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn),\n      y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn),\n      z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn);\n  return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);\n}\n\nfunction lab(l, a, b, opacity) {\n  return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);\n}\n\nfunction Lab(l, a, b, opacity) {\n  this.l = +l;\n  this.a = +a;\n  this.b = +b;\n  this.opacity = +opacity;\n}\n\ndefine(Lab, lab, extend(Color, {\n  brighter: function(k) {\n    return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);\n  },\n  darker: function(k) {\n    return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);\n  },\n  rgb: function() {\n    var y = (this.l + 16) / 116,\n        x = isNaN(this.a) ? y : y + this.a / 500,\n        z = isNaN(this.b) ? y : y - this.b / 200;\n    y = Yn * lab2xyz(y);\n    x = Xn * lab2xyz(x);\n    z = Zn * lab2xyz(z);\n    return new Rgb(\n      xyz2rgb( 3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB\n      xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z),\n      xyz2rgb( 0.0556434 * x - 0.2040259 * y + 1.0572252 * z),\n      this.opacity\n    );\n  }\n}));\n\nfunction xyz2lab(t) {\n  return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;\n}\n\nfunction lab2xyz(t) {\n  return t > t1 ? t * t * t : t2 * (t - t0);\n}\n\nfunction xyz2rgb(x) {\n  return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);\n}\n\nfunction rgb2xyz(x) {\n  return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);\n}\n\nfunction hclConvert(o) {\n  if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);\n  if (!(o instanceof Lab)) o = labConvert(o);\n  var h = Math.atan2(o.b, o.a) * rad2deg;\n  return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);\n}\n\nfunction hcl(h, c, l, opacity) {\n  return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);\n}\n\nfunction Hcl(h, c, l, opacity) {\n  this.h = +h;\n  this.c = +c;\n  this.l = +l;\n  this.opacity = +opacity;\n}\n\ndefine(Hcl, hcl, extend(Color, {\n  brighter: function(k) {\n    return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity);\n  },\n  darker: function(k) {\n    return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity);\n  },\n  rgb: function() {\n    return labConvert(this).rgb();\n  }\n}));\n\nvar A = -0.14861;\nvar B = +1.78277;\nvar C = -0.29227;\nvar D = -0.90649;\nvar E = +1.97294;\nvar ED = E * D;\nvar EB = E * B;\nvar BC_DA = B * C - D * A;\n\nfunction cubehelixConvert(o) {\n  if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);\n  if (!(o instanceof Rgb)) o = rgbConvert(o);\n  var r = o.r / 255,\n      g = o.g / 255,\n      b = o.b / 255,\n      l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),\n      bl = b - l,\n      k = (E * (g - l) - C * bl) / D,\n      s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1\n      h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;\n  return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);\n}\n\nfunction cubehelix(h, s, l, opacity) {\n  return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);\n}\n\nfunction Cubehelix(h, s, l, opacity) {\n  this.h = +h;\n  this.s = +s;\n  this.l = +l;\n  this.opacity = +opacity;\n}\n\ndefine(Cubehelix, cubehelix, extend(Color, {\n  brighter: function(k) {\n    k = k == null ? brighter : Math.pow(brighter, k);\n    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);\n  },\n  darker: function(k) {\n    k = k == null ? darker : Math.pow(darker, k);\n    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);\n  },\n  rgb: function() {\n    var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,\n        l = +this.l,\n        a = isNaN(this.s) ? 0 : this.s * l * (1 - l),\n        cosh = Math.cos(h),\n        sinh = Math.sin(h);\n    return new Rgb(\n      255 * (l + a * (A * cosh + B * sinh)),\n      255 * (l + a * (C * cosh + D * sinh)),\n      255 * (l + a * (E * cosh)),\n      this.opacity\n    );\n  }\n}));\n\nfunction basis(t1, v0, v1, v2, v3) {\n  var t2 = t1 * t1, t3 = t2 * t1;\n  return ((1 - 3 * t1 + 3 * t2 - t3) * v0\n      + (4 - 6 * t2 + 3 * t3) * v1\n      + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2\n      + t3 * v3) / 6;\n}\n\nvar basis$1 = function(values) {\n  var n = values.length - 1;\n  return function(t) {\n    var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),\n        v1 = values[i],\n        v2 = values[i + 1],\n        v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,\n        v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;\n    return basis((t - i / n) * n, v0, v1, v2, v3);\n  };\n};\n\nvar basisClosed = function(values) {\n  var n = values.length;\n  return function(t) {\n    var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),\n        v0 = values[(i + n - 1) % n],\n        v1 = values[i % n],\n        v2 = values[(i + 1) % n],\n        v3 = values[(i + 2) % n];\n    return basis((t - i / n) * n, v0, v1, v2, v3);\n  };\n};\n\nvar constant$3 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nfunction linear(a, d) {\n  return function(t) {\n    return a + t * d;\n  };\n}\n\nfunction exponential(a, b, y) {\n  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {\n    return Math.pow(a + t * b, y);\n  };\n}\n\nfunction hue(a, b) {\n  var d = b - a;\n  return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$3(isNaN(a) ? b : a);\n}\n\nfunction gamma(y) {\n  return (y = +y) === 1 ? nogamma : function(a, b) {\n    return b - a ? exponential(a, b, y) : constant$3(isNaN(a) ? b : a);\n  };\n}\n\nfunction nogamma(a, b) {\n  var d = b - a;\n  return d ? linear(a, d) : constant$3(isNaN(a) ? b : a);\n}\n\nvar interpolateRgb = ((function rgbGamma(y) {\n  var color$$1 = gamma(y);\n\n  function rgb$$1(start, end) {\n    var r = color$$1((start = rgb(start)).r, (end = rgb(end)).r),\n        g = color$$1(start.g, end.g),\n        b = color$$1(start.b, end.b),\n        opacity = nogamma(start.opacity, end.opacity);\n    return function(t) {\n      start.r = r(t);\n      start.g = g(t);\n      start.b = b(t);\n      start.opacity = opacity(t);\n      return start + \"\";\n    };\n  }\n\n  rgb$$1.gamma = rgbGamma;\n\n  return rgb$$1;\n}))(1);\n\nfunction rgbSpline(spline) {\n  return function(colors) {\n    var n = colors.length,\n        r = new Array(n),\n        g = new Array(n),\n        b = new Array(n),\n        i, color$$1;\n    for (i = 0; i < n; ++i) {\n      color$$1 = rgb(colors[i]);\n      r[i] = color$$1.r || 0;\n      g[i] = color$$1.g || 0;\n      b[i] = color$$1.b || 0;\n    }\n    r = spline(r);\n    g = spline(g);\n    b = spline(b);\n    color$$1.opacity = 1;\n    return function(t) {\n      color$$1.r = r(t);\n      color$$1.g = g(t);\n      color$$1.b = b(t);\n      return color$$1 + \"\";\n    };\n  };\n}\n\nvar rgbBasis = rgbSpline(basis$1);\nvar rgbBasisClosed = rgbSpline(basisClosed);\n\nvar array$1 = function(a, b) {\n  var nb = b ? b.length : 0,\n      na = a ? Math.min(nb, a.length) : 0,\n      x = new Array(nb),\n      c = new Array(nb),\n      i;\n\n  for (i = 0; i < na; ++i) x[i] = interpolateValue(a[i], b[i]);\n  for (; i < nb; ++i) c[i] = b[i];\n\n  return function(t) {\n    for (i = 0; i < na; ++i) c[i] = x[i](t);\n    return c;\n  };\n};\n\nvar date = function(a, b) {\n  var d = new Date;\n  return a = +a, b -= a, function(t) {\n    return d.setTime(a + b * t), d;\n  };\n};\n\nvar reinterpolate = function(a, b) {\n  return a = +a, b -= a, function(t) {\n    return a + b * t;\n  };\n};\n\nvar object = function(a, b) {\n  var i = {},\n      c = {},\n      k;\n\n  if (a === null || typeof a !== \"object\") a = {};\n  if (b === null || typeof b !== \"object\") b = {};\n\n  for (k in b) {\n    if (k in a) {\n      i[k] = interpolateValue(a[k], b[k]);\n    } else {\n      c[k] = b[k];\n    }\n  }\n\n  return function(t) {\n    for (k in i) c[k] = i[k](t);\n    return c;\n  };\n};\n\nvar reA = /[-+]?(?:\\d+\\.?\\d*|\\.?\\d+)(?:[eE][-+]?\\d+)?/g;\nvar reB = new RegExp(reA.source, \"g\");\n\nfunction zero(b) {\n  return function() {\n    return b;\n  };\n}\n\nfunction one(b) {\n  return function(t) {\n    return b(t) + \"\";\n  };\n}\n\nvar interpolateString = function(a, b) {\n  var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b\n      am, // current match in a\n      bm, // current match in b\n      bs, // string preceding current number in b, if any\n      i = -1, // index in s\n      s = [], // string constants and placeholders\n      q = []; // number interpolators\n\n  // Coerce inputs to strings.\n  a = a + \"\", b = b + \"\";\n\n  // Interpolate pairs of numbers in a & b.\n  while ((am = reA.exec(a))\n      && (bm = reB.exec(b))) {\n    if ((bs = bm.index) > bi) { // a string precedes the next number in b\n      bs = b.slice(bi, bs);\n      if (s[i]) s[i] += bs; // coalesce with previous string\n      else s[++i] = bs;\n    }\n    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match\n      if (s[i]) s[i] += bm; // coalesce with previous string\n      else s[++i] = bm;\n    } else { // interpolate non-matching numbers\n      s[++i] = null;\n      q.push({i: i, x: reinterpolate(am, bm)});\n    }\n    bi = reB.lastIndex;\n  }\n\n  // Add remains of b.\n  if (bi < b.length) {\n    bs = b.slice(bi);\n    if (s[i]) s[i] += bs; // coalesce with previous string\n    else s[++i] = bs;\n  }\n\n  // Special optimization for only a single match.\n  // Otherwise, interpolate each of the numbers and rejoin the string.\n  return s.length < 2 ? (q[0]\n      ? one(q[0].x)\n      : zero(b))\n      : (b = q.length, function(t) {\n          for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);\n          return s.join(\"\");\n        });\n};\n\nvar interpolateValue = function(a, b) {\n  var t = typeof b, c;\n  return b == null || t === \"boolean\" ? constant$3(b)\n      : (t === \"number\" ? reinterpolate\n      : t === \"string\" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString)\n      : b instanceof color ? interpolateRgb\n      : b instanceof Date ? date\n      : Array.isArray(b) ? array$1\n      : isNaN(b) ? object\n      : reinterpolate)(a, b);\n};\n\nvar interpolateRound = function(a, b) {\n  return a = +a, b -= a, function(t) {\n    return Math.round(a + b * t);\n  };\n};\n\nvar degrees = 180 / Math.PI;\n\nvar identity$2 = {\n  translateX: 0,\n  translateY: 0,\n  rotate: 0,\n  skewX: 0,\n  scaleX: 1,\n  scaleY: 1\n};\n\nvar decompose = function(a, b, c, d, e, f) {\n  var scaleX, scaleY, skewX;\n  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;\n  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;\n  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;\n  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;\n  return {\n    translateX: e,\n    translateY: f,\n    rotate: Math.atan2(b, a) * degrees,\n    skewX: Math.atan(skewX) * degrees,\n    scaleX: scaleX,\n    scaleY: scaleY\n  };\n};\n\nvar cssNode;\nvar cssRoot;\nvar cssView;\nvar svgNode;\n\nfunction parseCss(value) {\n  if (value === \"none\") return identity$2;\n  if (!cssNode) cssNode = document.createElement(\"DIV\"), cssRoot = document.documentElement, cssView = document.defaultView;\n  cssNode.style.transform = value;\n  value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue(\"transform\");\n  cssRoot.removeChild(cssNode);\n  value = value.slice(7, -1).split(\",\");\n  return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);\n}\n\nfunction parseSvg(value) {\n  if (value == null) return identity$2;\n  if (!svgNode) svgNode = document.createElementNS(\"http://www.w3.org/2000/svg\", \"g\");\n  svgNode.setAttribute(\"transform\", value);\n  if (!(value = svgNode.transform.baseVal.consolidate())) return identity$2;\n  value = value.matrix;\n  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);\n}\n\nfunction interpolateTransform(parse, pxComma, pxParen, degParen) {\n\n  function pop(s) {\n    return s.length ? s.pop() + \" \" : \"\";\n  }\n\n  function translate(xa, ya, xb, yb, s, q) {\n    if (xa !== xb || ya !== yb) {\n      var i = s.push(\"translate(\", null, pxComma, null, pxParen);\n      q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)});\n    } else if (xb || yb) {\n      s.push(\"translate(\" + xb + pxComma + yb + pxParen);\n    }\n  }\n\n  function rotate(a, b, s, q) {\n    if (a !== b) {\n      if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path\n      q.push({i: s.push(pop(s) + \"rotate(\", null, degParen) - 2, x: reinterpolate(a, b)});\n    } else if (b) {\n      s.push(pop(s) + \"rotate(\" + b + degParen);\n    }\n  }\n\n  function skewX(a, b, s, q) {\n    if (a !== b) {\n      q.push({i: s.push(pop(s) + \"skewX(\", null, degParen) - 2, x: reinterpolate(a, b)});\n    } else if (b) {\n      s.push(pop(s) + \"skewX(\" + b + degParen);\n    }\n  }\n\n  function scale(xa, ya, xb, yb, s, q) {\n    if (xa !== xb || ya !== yb) {\n      var i = s.push(pop(s) + \"scale(\", null, \",\", null, \")\");\n      q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)});\n    } else if (xb !== 1 || yb !== 1) {\n      s.push(pop(s) + \"scale(\" + xb + \",\" + yb + \")\");\n    }\n  }\n\n  return function(a, b) {\n    var s = [], // string constants and placeholders\n        q = []; // number interpolators\n    a = parse(a), b = parse(b);\n    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);\n    rotate(a.rotate, b.rotate, s, q);\n    skewX(a.skewX, b.skewX, s, q);\n    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);\n    a = b = null; // gc\n    return function(t) {\n      var i = -1, n = q.length, o;\n      while (++i < n) s[(o = q[i]).i] = o.x(t);\n      return s.join(\"\");\n    };\n  };\n}\n\nvar interpolateTransformCss = interpolateTransform(parseCss, \"px, \", \"px)\", \"deg)\");\nvar interpolateTransformSvg = interpolateTransform(parseSvg, \", \", \")\", \")\");\n\nvar rho = Math.SQRT2;\nvar rho2 = 2;\nvar rho4 = 4;\nvar epsilon2 = 1e-12;\n\nfunction cosh(x) {\n  return ((x = Math.exp(x)) + 1 / x) / 2;\n}\n\nfunction sinh(x) {\n  return ((x = Math.exp(x)) - 1 / x) / 2;\n}\n\nfunction tanh(x) {\n  return ((x = Math.exp(2 * x)) - 1) / (x + 1);\n}\n\n// p0 = [ux0, uy0, w0]\n// p1 = [ux1, uy1, w1]\nvar interpolateZoom = function(p0, p1) {\n  var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],\n      ux1 = p1[0], uy1 = p1[1], w1 = p1[2],\n      dx = ux1 - ux0,\n      dy = uy1 - uy0,\n      d2 = dx * dx + dy * dy,\n      i,\n      S;\n\n  // Special case for u0 ≅ u1.\n  if (d2 < epsilon2) {\n    S = Math.log(w1 / w0) / rho;\n    i = function(t) {\n      return [\n        ux0 + t * dx,\n        uy0 + t * dy,\n        w0 * Math.exp(rho * t * S)\n      ];\n    };\n  }\n\n  // General case.\n  else {\n    var d1 = Math.sqrt(d2),\n        b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),\n        b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),\n        r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),\n        r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);\n    S = (r1 - r0) / rho;\n    i = function(t) {\n      var s = t * S,\n          coshr0 = cosh(r0),\n          u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));\n      return [\n        ux0 + u * dx,\n        uy0 + u * dy,\n        w0 * coshr0 / cosh(rho * s + r0)\n      ];\n    };\n  }\n\n  i.duration = S * 1000;\n\n  return i;\n};\n\nfunction hsl$1(hue$$1) {\n  return function(start, end) {\n    var h = hue$$1((start = hsl(start)).h, (end = hsl(end)).h),\n        s = nogamma(start.s, end.s),\n        l = nogamma(start.l, end.l),\n        opacity = nogamma(start.opacity, end.opacity);\n    return function(t) {\n      start.h = h(t);\n      start.s = s(t);\n      start.l = l(t);\n      start.opacity = opacity(t);\n      return start + \"\";\n    };\n  }\n}\n\nvar hsl$2 = hsl$1(hue);\nvar hslLong = hsl$1(nogamma);\n\nfunction lab$1(start, end) {\n  var l = nogamma((start = lab(start)).l, (end = lab(end)).l),\n      a = nogamma(start.a, end.a),\n      b = nogamma(start.b, end.b),\n      opacity = nogamma(start.opacity, end.opacity);\n  return function(t) {\n    start.l = l(t);\n    start.a = a(t);\n    start.b = b(t);\n    start.opacity = opacity(t);\n    return start + \"\";\n  };\n}\n\nfunction hcl$1(hue$$1) {\n  return function(start, end) {\n    var h = hue$$1((start = hcl(start)).h, (end = hcl(end)).h),\n        c = nogamma(start.c, end.c),\n        l = nogamma(start.l, end.l),\n        opacity = nogamma(start.opacity, end.opacity);\n    return function(t) {\n      start.h = h(t);\n      start.c = c(t);\n      start.l = l(t);\n      start.opacity = opacity(t);\n      return start + \"\";\n    };\n  }\n}\n\nvar hcl$2 = hcl$1(hue);\nvar hclLong = hcl$1(nogamma);\n\nfunction cubehelix$1(hue$$1) {\n  return (function cubehelixGamma(y) {\n    y = +y;\n\n    function cubehelix$$1(start, end) {\n      var h = hue$$1((start = cubehelix(start)).h, (end = cubehelix(end)).h),\n          s = nogamma(start.s, end.s),\n          l = nogamma(start.l, end.l),\n          opacity = nogamma(start.opacity, end.opacity);\n      return function(t) {\n        start.h = h(t);\n        start.s = s(t);\n        start.l = l(Math.pow(t, y));\n        start.opacity = opacity(t);\n        return start + \"\";\n      };\n    }\n\n    cubehelix$$1.gamma = cubehelixGamma;\n\n    return cubehelix$$1;\n  })(1);\n}\n\nvar cubehelix$2 = cubehelix$1(hue);\nvar cubehelixLong = cubehelix$1(nogamma);\n\nvar quantize = function(interpolator, n) {\n  var samples = new Array(n);\n  for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));\n  return samples;\n};\n\nvar frame = 0;\nvar timeout = 0;\nvar interval = 0;\nvar pokeDelay = 1000;\nvar taskHead;\nvar taskTail;\nvar clockLast = 0;\nvar clockNow = 0;\nvar clockSkew = 0;\nvar clock = typeof performance === \"object\" && performance.now ? performance : Date;\nvar setFrame = typeof requestAnimationFrame === \"function\" ? requestAnimationFrame : function(f) { setTimeout(f, 17); };\n\nfunction now() {\n  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);\n}\n\nfunction clearNow() {\n  clockNow = 0;\n}\n\nfunction Timer() {\n  this._call =\n  this._time =\n  this._next = null;\n}\n\nTimer.prototype = timer.prototype = {\n  constructor: Timer,\n  restart: function(callback, delay, time) {\n    if (typeof callback !== \"function\") throw new TypeError(\"callback is not a function\");\n    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);\n    if (!this._next && taskTail !== this) {\n      if (taskTail) taskTail._next = this;\n      else taskHead = this;\n      taskTail = this;\n    }\n    this._call = callback;\n    this._time = time;\n    sleep();\n  },\n  stop: function() {\n    if (this._call) {\n      this._call = null;\n      this._time = Infinity;\n      sleep();\n    }\n  }\n};\n\nfunction timer(callback, delay, time) {\n  var t = new Timer;\n  t.restart(callback, delay, time);\n  return t;\n}\n\nfunction timerFlush() {\n  now(); // Get the current time, if not already set.\n  ++frame; // Pretend we’ve set an alarm, if we haven’t already.\n  var t = taskHead, e;\n  while (t) {\n    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);\n    t = t._next;\n  }\n  --frame;\n}\n\nfunction wake() {\n  clockNow = (clockLast = clock.now()) + clockSkew;\n  frame = timeout = 0;\n  try {\n    timerFlush();\n  } finally {\n    frame = 0;\n    nap();\n    clockNow = 0;\n  }\n}\n\nfunction poke() {\n  var now = clock.now(), delay = now - clockLast;\n  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;\n}\n\nfunction nap() {\n  var t0, t1 = taskHead, t2, time = Infinity;\n  while (t1) {\n    if (t1._call) {\n      if (time > t1._time) time = t1._time;\n      t0 = t1, t1 = t1._next;\n    } else {\n      t2 = t1._next, t1._next = null;\n      t1 = t0 ? t0._next = t2 : taskHead = t2;\n    }\n  }\n  taskTail = t0;\n  sleep(time);\n}\n\nfunction sleep(time) {\n  if (frame) return; // Soonest alarm already set, or will be.\n  if (timeout) timeout = clearTimeout(timeout);\n  var delay = time - clockNow;\n  if (delay > 24) {\n    if (time < Infinity) timeout = setTimeout(wake, delay);\n    if (interval) interval = clearInterval(interval);\n  } else {\n    if (!interval) clockLast = clockNow, interval = setInterval(poke, pokeDelay);\n    frame = 1, setFrame(wake);\n  }\n}\n\nvar timeout$1 = function(callback, delay, time) {\n  var t = new Timer;\n  delay = delay == null ? 0 : +delay;\n  t.restart(function(elapsed) {\n    t.stop();\n    callback(elapsed + delay);\n  }, delay, time);\n  return t;\n};\n\nvar interval$1 = function(callback, delay, time) {\n  var t = new Timer, total = delay;\n  if (delay == null) return t.restart(callback, delay, time), t;\n  delay = +delay, time = time == null ? now() : +time;\n  t.restart(function tick(elapsed) {\n    elapsed += total;\n    t.restart(tick, total += delay, time);\n    callback(elapsed);\n  }, delay, time);\n  return t;\n};\n\nvar emptyOn = dispatch(\"start\", \"end\", \"interrupt\");\nvar emptyTween = [];\n\nvar CREATED = 0;\nvar SCHEDULED = 1;\nvar STARTING = 2;\nvar STARTED = 3;\nvar RUNNING = 4;\nvar ENDING = 5;\nvar ENDED = 6;\n\nvar schedule = function(node, name, id, index, group, timing) {\n  var schedules = node.__transition;\n  if (!schedules) node.__transition = {};\n  else if (id in schedules) return;\n  create(node, id, {\n    name: name,\n    index: index, // For context during callback.\n    group: group, // For context during callback.\n    on: emptyOn,\n    tween: emptyTween,\n    time: timing.time,\n    delay: timing.delay,\n    duration: timing.duration,\n    ease: timing.ease,\n    timer: null,\n    state: CREATED\n  });\n};\n\nfunction init(node, id) {\n  var schedule = node.__transition;\n  if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error(\"too late\");\n  return schedule;\n}\n\nfunction set$1(node, id) {\n  var schedule = node.__transition;\n  if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error(\"too late\");\n  return schedule;\n}\n\nfunction get$1(node, id) {\n  var schedule = node.__transition;\n  if (!schedule || !(schedule = schedule[id])) throw new Error(\"too late\");\n  return schedule;\n}\n\nfunction create(node, id, self) {\n  var schedules = node.__transition,\n      tween;\n\n  // Initialize the self timer when the transition is created.\n  // Note the actual delay is not known until the first callback!\n  schedules[id] = self;\n  self.timer = timer(schedule, 0, self.time);\n\n  function schedule(elapsed) {\n    self.state = SCHEDULED;\n    self.timer.restart(start, self.delay, self.time);\n\n    // If the elapsed delay is less than our first sleep, start immediately.\n    if (self.delay <= elapsed) start(elapsed - self.delay);\n  }\n\n  function start(elapsed) {\n    var i, j, n, o;\n\n    // If the state is not SCHEDULED, then we previously errored on start.\n    if (self.state !== SCHEDULED) return stop();\n\n    for (i in schedules) {\n      o = schedules[i];\n      if (o.name !== self.name) continue;\n\n      // While this element already has a starting transition during this frame,\n      // defer starting an interrupting transition until that transition has a\n      // chance to tick (and possibly end); see d3/d3-transition#54!\n      if (o.state === STARTED) return timeout$1(start);\n\n      // Interrupt the active transition, if any.\n      // Dispatch the interrupt event.\n      if (o.state === RUNNING) {\n        o.state = ENDED;\n        o.timer.stop();\n        o.on.call(\"interrupt\", node, node.__data__, o.index, o.group);\n        delete schedules[i];\n      }\n\n      // Cancel any pre-empted transitions. No interrupt event is dispatched\n      // because the cancelled transitions never started. Note that this also\n      // removes this transition from the pending list!\n      else if (+i < id) {\n        o.state = ENDED;\n        o.timer.stop();\n        delete schedules[i];\n      }\n    }\n\n    // Defer the first tick to end of the current frame; see d3/d3#1576.\n    // Note the transition may be canceled after start and before the first tick!\n    // Note this must be scheduled before the start event; see d3/d3-transition#16!\n    // Assuming this is successful, subsequent callbacks go straight to tick.\n    timeout$1(function() {\n      if (self.state === STARTED) {\n        self.state = RUNNING;\n        self.timer.restart(tick, self.delay, self.time);\n        tick(elapsed);\n      }\n    });\n\n    // Dispatch the start event.\n    // Note this must be done before the tween are initialized.\n    self.state = STARTING;\n    self.on.call(\"start\", node, node.__data__, self.index, self.group);\n    if (self.state !== STARTING) return; // interrupted\n    self.state = STARTED;\n\n    // Initialize the tween, deleting null tween.\n    tween = new Array(n = self.tween.length);\n    for (i = 0, j = -1; i < n; ++i) {\n      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {\n        tween[++j] = o;\n      }\n    }\n    tween.length = j + 1;\n  }\n\n  function tick(elapsed) {\n    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),\n        i = -1,\n        n = tween.length;\n\n    while (++i < n) {\n      tween[i].call(null, t);\n    }\n\n    // Dispatch the end event.\n    if (self.state === ENDING) {\n      self.on.call(\"end\", node, node.__data__, self.index, self.group);\n      stop();\n    }\n  }\n\n  function stop() {\n    self.state = ENDED;\n    self.timer.stop();\n    delete schedules[id];\n    for (var i in schedules) return; // eslint-disable-line no-unused-vars\n    delete node.__transition;\n  }\n}\n\nvar interrupt = function(node, name) {\n  var schedules = node.__transition,\n      schedule,\n      active,\n      empty = true,\n      i;\n\n  if (!schedules) return;\n\n  name = name == null ? null : name + \"\";\n\n  for (i in schedules) {\n    if ((schedule = schedules[i]).name !== name) { empty = false; continue; }\n    active = schedule.state > STARTING && schedule.state < ENDING;\n    schedule.state = ENDED;\n    schedule.timer.stop();\n    if (active) schedule.on.call(\"interrupt\", node, node.__data__, schedule.index, schedule.group);\n    delete schedules[i];\n  }\n\n  if (empty) delete node.__transition;\n};\n\nvar selection_interrupt = function(name) {\n  return this.each(function() {\n    interrupt(this, name);\n  });\n};\n\nfunction tweenRemove(id, name) {\n  var tween0, tween1;\n  return function() {\n    var schedule = set$1(this, id),\n        tween = schedule.tween;\n\n    // If this node shared tween with the previous node,\n    // just assign the updated shared tween and we’re done!\n    // Otherwise, copy-on-write.\n    if (tween !== tween0) {\n      tween1 = tween0 = tween;\n      for (var i = 0, n = tween1.length; i < n; ++i) {\n        if (tween1[i].name === name) {\n          tween1 = tween1.slice();\n          tween1.splice(i, 1);\n          break;\n        }\n      }\n    }\n\n    schedule.tween = tween1;\n  };\n}\n\nfunction tweenFunction(id, name, value) {\n  var tween0, tween1;\n  if (typeof value !== \"function\") throw new Error;\n  return function() {\n    var schedule = set$1(this, id),\n        tween = schedule.tween;\n\n    // If this node shared tween with the previous node,\n    // just assign the updated shared tween and we’re done!\n    // Otherwise, copy-on-write.\n    if (tween !== tween0) {\n      tween1 = (tween0 = tween).slice();\n      for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {\n        if (tween1[i].name === name) {\n          tween1[i] = t;\n          break;\n        }\n      }\n      if (i === n) tween1.push(t);\n    }\n\n    schedule.tween = tween1;\n  };\n}\n\nvar transition_tween = function(name, value) {\n  var id = this._id;\n\n  name += \"\";\n\n  if (arguments.length < 2) {\n    var tween = get$1(this.node(), id).tween;\n    for (var i = 0, n = tween.length, t; i < n; ++i) {\n      if ((t = tween[i]).name === name) {\n        return t.value;\n      }\n    }\n    return null;\n  }\n\n  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));\n};\n\nfunction tweenValue(transition, name, value) {\n  var id = transition._id;\n\n  transition.each(function() {\n    var schedule = set$1(this, id);\n    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);\n  });\n\n  return function(node) {\n    return get$1(node, id).value[name];\n  };\n}\n\nvar interpolate$$1 = function(a, b) {\n  var c;\n  return (typeof b === \"number\" ? reinterpolate\n      : b instanceof color ? interpolateRgb\n      : (c = color(b)) ? (b = c, interpolateRgb)\n      : interpolateString)(a, b);\n};\n\nfunction attrRemove$1(name) {\n  return function() {\n    this.removeAttribute(name);\n  };\n}\n\nfunction attrRemoveNS$1(fullname) {\n  return function() {\n    this.removeAttributeNS(fullname.space, fullname.local);\n  };\n}\n\nfunction attrConstant$1(name, interpolate$$1, value1) {\n  var value00,\n      interpolate0;\n  return function() {\n    var value0 = this.getAttribute(name);\n    return value0 === value1 ? null\n        : value0 === value00 ? interpolate0\n        : interpolate0 = interpolate$$1(value00 = value0, value1);\n  };\n}\n\nfunction attrConstantNS$1(fullname, interpolate$$1, value1) {\n  var value00,\n      interpolate0;\n  return function() {\n    var value0 = this.getAttributeNS(fullname.space, fullname.local);\n    return value0 === value1 ? null\n        : value0 === value00 ? interpolate0\n        : interpolate0 = interpolate$$1(value00 = value0, value1);\n  };\n}\n\nfunction attrFunction$1(name, interpolate$$1, value) {\n  var value00,\n      value10,\n      interpolate0;\n  return function() {\n    var value0, value1 = value(this);\n    if (value1 == null) return void this.removeAttribute(name);\n    value0 = this.getAttribute(name);\n    return value0 === value1 ? null\n        : value0 === value00 && value1 === value10 ? interpolate0\n        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);\n  };\n}\n\nfunction attrFunctionNS$1(fullname, interpolate$$1, value) {\n  var value00,\n      value10,\n      interpolate0;\n  return function() {\n    var value0, value1 = value(this);\n    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);\n    value0 = this.getAttributeNS(fullname.space, fullname.local);\n    return value0 === value1 ? null\n        : value0 === value00 && value1 === value10 ? interpolate0\n        : interpolate0 = interpolate$$1(value00 = value0, value10 = value1);\n  };\n}\n\nvar transition_attr = function(name, value) {\n  var fullname = namespace(name), i = fullname === \"transform\" ? interpolateTransformSvg : interpolate$$1;\n  return this.attrTween(name, typeof value === \"function\"\n      ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, \"attr.\" + name, value))\n      : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)\n      : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value + \"\"));\n};\n\nfunction attrTweenNS(fullname, value) {\n  function tween() {\n    var node = this, i = value.apply(node, arguments);\n    return i && function(t) {\n      node.setAttributeNS(fullname.space, fullname.local, i(t));\n    };\n  }\n  tween._value = value;\n  return tween;\n}\n\nfunction attrTween(name, value) {\n  function tween() {\n    var node = this, i = value.apply(node, arguments);\n    return i && function(t) {\n      node.setAttribute(name, i(t));\n    };\n  }\n  tween._value = value;\n  return tween;\n}\n\nvar transition_attrTween = function(name, value) {\n  var key = \"attr.\" + name;\n  if (arguments.length < 2) return (key = this.tween(key)) && key._value;\n  if (value == null) return this.tween(key, null);\n  if (typeof value !== \"function\") throw new Error;\n  var fullname = namespace(name);\n  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));\n};\n\nfunction delayFunction(id, value) {\n  return function() {\n    init(this, id).delay = +value.apply(this, arguments);\n  };\n}\n\nfunction delayConstant(id, value) {\n  return value = +value, function() {\n    init(this, id).delay = value;\n  };\n}\n\nvar transition_delay = function(value) {\n  var id = this._id;\n\n  return arguments.length\n      ? this.each((typeof value === \"function\"\n          ? delayFunction\n          : delayConstant)(id, value))\n      : get$1(this.node(), id).delay;\n};\n\nfunction durationFunction(id, value) {\n  return function() {\n    set$1(this, id).duration = +value.apply(this, arguments);\n  };\n}\n\nfunction durationConstant(id, value) {\n  return value = +value, function() {\n    set$1(this, id).duration = value;\n  };\n}\n\nvar transition_duration = function(value) {\n  var id = this._id;\n\n  return arguments.length\n      ? this.each((typeof value === \"function\"\n          ? durationFunction\n          : durationConstant)(id, value))\n      : get$1(this.node(), id).duration;\n};\n\nfunction easeConstant(id, value) {\n  if (typeof value !== \"function\") throw new Error;\n  return function() {\n    set$1(this, id).ease = value;\n  };\n}\n\nvar transition_ease = function(value) {\n  var id = this._id;\n\n  return arguments.length\n      ? this.each(easeConstant(id, value))\n      : get$1(this.node(), id).ease;\n};\n\nvar transition_filter = function(match) {\n  if (typeof match !== \"function\") match = matcher$1(match);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {\n      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {\n        subgroup.push(node);\n      }\n    }\n  }\n\n  return new Transition(subgroups, this._parents, this._name, this._id);\n};\n\nvar transition_merge = function(transition) {\n  if (transition._id !== this._id) throw new Error;\n\n  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {\n    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {\n      if (node = group0[i] || group1[i]) {\n        merge[i] = node;\n      }\n    }\n  }\n\n  for (; j < m0; ++j) {\n    merges[j] = groups0[j];\n  }\n\n  return new Transition(merges, this._parents, this._name, this._id);\n};\n\nfunction start(name) {\n  return (name + \"\").trim().split(/^|\\s+/).every(function(t) {\n    var i = t.indexOf(\".\");\n    if (i >= 0) t = t.slice(0, i);\n    return !t || t === \"start\";\n  });\n}\n\nfunction onFunction(id, name, listener) {\n  var on0, on1, sit = start(name) ? init : set$1;\n  return function() {\n    var schedule = sit(this, id),\n        on = schedule.on;\n\n    // If this node shared a dispatch with the previous node,\n    // just assign the updated shared dispatch and we’re done!\n    // Otherwise, copy-on-write.\n    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);\n\n    schedule.on = on1;\n  };\n}\n\nvar transition_on = function(name, listener) {\n  var id = this._id;\n\n  return arguments.length < 2\n      ? get$1(this.node(), id).on.on(name)\n      : this.each(onFunction(id, name, listener));\n};\n\nfunction removeFunction(id) {\n  return function() {\n    var parent = this.parentNode;\n    for (var i in this.__transition) if (+i !== id) return;\n    if (parent) parent.removeChild(this);\n  };\n}\n\nvar transition_remove = function() {\n  return this.on(\"end.remove\", removeFunction(this._id));\n};\n\nvar transition_select = function(select$$1) {\n  var name = this._name,\n      id = this._id;\n\n  if (typeof select$$1 !== \"function\") select$$1 = selector(select$$1);\n\n  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {\n      if ((node = group[i]) && (subnode = select$$1.call(node, node.__data__, i, group))) {\n        if (\"__data__\" in node) subnode.__data__ = node.__data__;\n        subgroup[i] = subnode;\n        schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));\n      }\n    }\n  }\n\n  return new Transition(subgroups, this._parents, name, id);\n};\n\nvar transition_selectAll = function(select$$1) {\n  var name = this._name,\n      id = this._id;\n\n  if (typeof select$$1 !== \"function\") select$$1 = selectorAll(select$$1);\n\n  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        for (var children = select$$1.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {\n          if (child = children[k]) {\n            schedule(child, name, id, k, children, inherit);\n          }\n        }\n        subgroups.push(children);\n        parents.push(node);\n      }\n    }\n  }\n\n  return new Transition(subgroups, parents, name, id);\n};\n\nvar Selection$1 = selection.prototype.constructor;\n\nvar transition_selection = function() {\n  return new Selection$1(this._groups, this._parents);\n};\n\nfunction styleRemove$1(name, interpolate$$2) {\n  var value00,\n      value10,\n      interpolate0;\n  return function() {\n    var style = window(this).getComputedStyle(this, null),\n        value0 = style.getPropertyValue(name),\n        value1 = (this.style.removeProperty(name), style.getPropertyValue(name));\n    return value0 === value1 ? null\n        : value0 === value00 && value1 === value10 ? interpolate0\n        : interpolate0 = interpolate$$2(value00 = value0, value10 = value1);\n  };\n}\n\nfunction styleRemoveEnd(name) {\n  return function() {\n    this.style.removeProperty(name);\n  };\n}\n\nfunction styleConstant$1(name, interpolate$$2, value1) {\n  var value00,\n      interpolate0;\n  return function() {\n    var value0 = window(this).getComputedStyle(this, null).getPropertyValue(name);\n    return value0 === value1 ? null\n        : value0 === value00 ? interpolate0\n        : interpolate0 = interpolate$$2(value00 = value0, value1);\n  };\n}\n\nfunction styleFunction$1(name, interpolate$$2, value) {\n  var value00,\n      value10,\n      interpolate0;\n  return function() {\n    var style = window(this).getComputedStyle(this, null),\n        value0 = style.getPropertyValue(name),\n        value1 = value(this);\n    if (value1 == null) value1 = (this.style.removeProperty(name), style.getPropertyValue(name));\n    return value0 === value1 ? null\n        : value0 === value00 && value1 === value10 ? interpolate0\n        : interpolate0 = interpolate$$2(value00 = value0, value10 = value1);\n  };\n}\n\nvar transition_style = function(name, value, priority) {\n  var i = (name += \"\") === \"transform\" ? interpolateTransformCss : interpolate$$1;\n  return value == null ? this\n          .styleTween(name, styleRemove$1(name, i))\n          .on(\"end.style.\" + name, styleRemoveEnd(name))\n      : this.styleTween(name, typeof value === \"function\"\n          ? styleFunction$1(name, i, tweenValue(this, \"style.\" + name, value))\n          : styleConstant$1(name, i, value + \"\"), priority);\n};\n\nfunction styleTween(name, value, priority) {\n  function tween() {\n    var node = this, i = value.apply(node, arguments);\n    return i && function(t) {\n      node.style.setProperty(name, i(t), priority);\n    };\n  }\n  tween._value = value;\n  return tween;\n}\n\nvar transition_styleTween = function(name, value, priority) {\n  var key = \"style.\" + (name += \"\");\n  if (arguments.length < 2) return (key = this.tween(key)) && key._value;\n  if (value == null) return this.tween(key, null);\n  if (typeof value !== \"function\") throw new Error;\n  return this.tween(key, styleTween(name, value, priority == null ? \"\" : priority));\n};\n\nfunction textConstant$1(value) {\n  return function() {\n    this.textContent = value;\n  };\n}\n\nfunction textFunction$1(value) {\n  return function() {\n    var value1 = value(this);\n    this.textContent = value1 == null ? \"\" : value1;\n  };\n}\n\nvar transition_text = function(value) {\n  return this.tween(\"text\", typeof value === \"function\"\n      ? textFunction$1(tweenValue(this, \"text\", value))\n      : textConstant$1(value == null ? \"\" : value + \"\"));\n};\n\nvar transition_transition = function() {\n  var name = this._name,\n      id0 = this._id,\n      id1 = newId();\n\n  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        var inherit = get$1(node, id0);\n        schedule(node, name, id1, i, group, {\n          time: inherit.time + inherit.delay + inherit.duration,\n          delay: 0,\n          duration: inherit.duration,\n          ease: inherit.ease\n        });\n      }\n    }\n  }\n\n  return new Transition(groups, this._parents, name, id1);\n};\n\nvar id = 0;\n\nfunction Transition(groups, parents, name, id) {\n  this._groups = groups;\n  this._parents = parents;\n  this._name = name;\n  this._id = id;\n}\n\nfunction transition(name) {\n  return selection().transition(name);\n}\n\nfunction newId() {\n  return ++id;\n}\n\nvar selection_prototype = selection.prototype;\n\nTransition.prototype = transition.prototype = {\n  constructor: Transition,\n  select: transition_select,\n  selectAll: transition_selectAll,\n  filter: transition_filter,\n  merge: transition_merge,\n  selection: transition_selection,\n  transition: transition_transition,\n  call: selection_prototype.call,\n  nodes: selection_prototype.nodes,\n  node: selection_prototype.node,\n  size: selection_prototype.size,\n  empty: selection_prototype.empty,\n  each: selection_prototype.each,\n  on: transition_on,\n  attr: transition_attr,\n  attrTween: transition_attrTween,\n  style: transition_style,\n  styleTween: transition_styleTween,\n  text: transition_text,\n  remove: transition_remove,\n  tween: transition_tween,\n  delay: transition_delay,\n  duration: transition_duration,\n  ease: transition_ease\n};\n\nfunction linear$1(t) {\n  return +t;\n}\n\nfunction quadIn(t) {\n  return t * t;\n}\n\nfunction quadOut(t) {\n  return t * (2 - t);\n}\n\nfunction quadInOut(t) {\n  return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;\n}\n\nfunction cubicIn(t) {\n  return t * t * t;\n}\n\nfunction cubicOut(t) {\n  return --t * t * t + 1;\n}\n\nfunction cubicInOut(t) {\n  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;\n}\n\nvar exponent = 3;\n\nvar polyIn = (function custom(e) {\n  e = +e;\n\n  function polyIn(t) {\n    return Math.pow(t, e);\n  }\n\n  polyIn.exponent = custom;\n\n  return polyIn;\n})(exponent);\n\nvar polyOut = (function custom(e) {\n  e = +e;\n\n  function polyOut(t) {\n    return 1 - Math.pow(1 - t, e);\n  }\n\n  polyOut.exponent = custom;\n\n  return polyOut;\n})(exponent);\n\nvar polyInOut = (function custom(e) {\n  e = +e;\n\n  function polyInOut(t) {\n    return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;\n  }\n\n  polyInOut.exponent = custom;\n\n  return polyInOut;\n})(exponent);\n\nvar pi = Math.PI;\nvar halfPi = pi / 2;\n\nfunction sinIn(t) {\n  return 1 - Math.cos(t * halfPi);\n}\n\nfunction sinOut(t) {\n  return Math.sin(t * halfPi);\n}\n\nfunction sinInOut(t) {\n  return (1 - Math.cos(pi * t)) / 2;\n}\n\nfunction expIn(t) {\n  return Math.pow(2, 10 * t - 10);\n}\n\nfunction expOut(t) {\n  return 1 - Math.pow(2, -10 * t);\n}\n\nfunction expInOut(t) {\n  return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;\n}\n\nfunction circleIn(t) {\n  return 1 - Math.sqrt(1 - t * t);\n}\n\nfunction circleOut(t) {\n  return Math.sqrt(1 - --t * t);\n}\n\nfunction circleInOut(t) {\n  return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;\n}\n\nvar b1 = 4 / 11;\nvar b2 = 6 / 11;\nvar b3 = 8 / 11;\nvar b4 = 3 / 4;\nvar b5 = 9 / 11;\nvar b6 = 10 / 11;\nvar b7 = 15 / 16;\nvar b8 = 21 / 22;\nvar b9 = 63 / 64;\nvar b0 = 1 / b1 / b1;\n\nfunction bounceIn(t) {\n  return 1 - bounceOut(1 - t);\n}\n\nfunction bounceOut(t) {\n  return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;\n}\n\nfunction bounceInOut(t) {\n  return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;\n}\n\nvar overshoot = 1.70158;\n\nvar backIn = (function custom(s) {\n  s = +s;\n\n  function backIn(t) {\n    return t * t * ((s + 1) * t - s);\n  }\n\n  backIn.overshoot = custom;\n\n  return backIn;\n})(overshoot);\n\nvar backOut = (function custom(s) {\n  s = +s;\n\n  function backOut(t) {\n    return --t * t * ((s + 1) * t + s) + 1;\n  }\n\n  backOut.overshoot = custom;\n\n  return backOut;\n})(overshoot);\n\nvar backInOut = (function custom(s) {\n  s = +s;\n\n  function backInOut(t) {\n    return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;\n  }\n\n  backInOut.overshoot = custom;\n\n  return backInOut;\n})(overshoot);\n\nvar tau = 2 * Math.PI;\nvar amplitude = 1;\nvar period = 0.3;\n\nvar elasticIn = (function custom(a, p) {\n  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n\n  function elasticIn(t) {\n    return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);\n  }\n\n  elasticIn.amplitude = function(a) { return custom(a, p * tau); };\n  elasticIn.period = function(p) { return custom(a, p); };\n\n  return elasticIn;\n})(amplitude, period);\n\nvar elasticOut = (function custom(a, p) {\n  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n\n  function elasticOut(t) {\n    return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);\n  }\n\n  elasticOut.amplitude = function(a) { return custom(a, p * tau); };\n  elasticOut.period = function(p) { return custom(a, p); };\n\n  return elasticOut;\n})(amplitude, period);\n\nvar elasticInOut = (function custom(a, p) {\n  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n\n  function elasticInOut(t) {\n    return ((t = t * 2 - 1) < 0\n        ? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p)\n        : 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;\n  }\n\n  elasticInOut.amplitude = function(a) { return custom(a, p * tau); };\n  elasticInOut.period = function(p) { return custom(a, p); };\n\n  return elasticInOut;\n})(amplitude, period);\n\nvar defaultTiming = {\n  time: null, // Set on use.\n  delay: 0,\n  duration: 250,\n  ease: cubicInOut\n};\n\nfunction inherit(node, id) {\n  var timing;\n  while (!(timing = node.__transition) || !(timing = timing[id])) {\n    if (!(node = node.parentNode)) {\n      return defaultTiming.time = now(), defaultTiming;\n    }\n  }\n  return timing;\n}\n\nvar selection_transition = function(name) {\n  var id,\n      timing;\n\n  if (name instanceof Transition) {\n    id = name._id, name = name._name;\n  } else {\n    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + \"\";\n  }\n\n  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {\n    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n      if (node = group[i]) {\n        schedule(node, name, id, i, group, timing || inherit(node, id));\n      }\n    }\n  }\n\n  return new Transition(groups, this._parents, name, id);\n};\n\nselection.prototype.interrupt = selection_interrupt;\nselection.prototype.transition = selection_transition;\n\nvar root$1 = [null];\n\nvar active = function(node, name) {\n  var schedules = node.__transition,\n      schedule,\n      i;\n\n  if (schedules) {\n    name = name == null ? null : name + \"\";\n    for (i in schedules) {\n      if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {\n        return new Transition([[node]], root$1, name, +i);\n      }\n    }\n  }\n\n  return null;\n};\n\nvar constant$4 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar BrushEvent = function(target, type, selection) {\n  this.target = target;\n  this.type = type;\n  this.selection = selection;\n};\n\nfunction nopropagation$1() {\n  exports.event.stopImmediatePropagation();\n}\n\nvar noevent$1 = function() {\n  exports.event.preventDefault();\n  exports.event.stopImmediatePropagation();\n};\n\nvar MODE_DRAG = {name: \"drag\"};\nvar MODE_SPACE = {name: \"space\"};\nvar MODE_HANDLE = {name: \"handle\"};\nvar MODE_CENTER = {name: \"center\"};\n\nvar X = {\n  name: \"x\",\n  handles: [\"e\", \"w\"].map(type),\n  input: function(x, e) { return x && [[x[0], e[0][1]], [x[1], e[1][1]]]; },\n  output: function(xy) { return xy && [xy[0][0], xy[1][0]]; }\n};\n\nvar Y = {\n  name: \"y\",\n  handles: [\"n\", \"s\"].map(type),\n  input: function(y, e) { return y && [[e[0][0], y[0]], [e[1][0], y[1]]]; },\n  output: function(xy) { return xy && [xy[0][1], xy[1][1]]; }\n};\n\nvar XY = {\n  name: \"xy\",\n  handles: [\"n\", \"e\", \"s\", \"w\", \"nw\", \"ne\", \"se\", \"sw\"].map(type),\n  input: function(xy) { return xy; },\n  output: function(xy) { return xy; }\n};\n\nvar cursors = {\n  overlay: \"crosshair\",\n  selection: \"move\",\n  n: \"ns-resize\",\n  e: \"ew-resize\",\n  s: \"ns-resize\",\n  w: \"ew-resize\",\n  nw: \"nwse-resize\",\n  ne: \"nesw-resize\",\n  se: \"nwse-resize\",\n  sw: \"nesw-resize\"\n};\n\nvar flipX = {\n  e: \"w\",\n  w: \"e\",\n  nw: \"ne\",\n  ne: \"nw\",\n  se: \"sw\",\n  sw: \"se\"\n};\n\nvar flipY = {\n  n: \"s\",\n  s: \"n\",\n  nw: \"sw\",\n  ne: \"se\",\n  se: \"ne\",\n  sw: \"nw\"\n};\n\nvar signsX = {\n  overlay: +1,\n  selection: +1,\n  n: null,\n  e: +1,\n  s: null,\n  w: -1,\n  nw: -1,\n  ne: +1,\n  se: +1,\n  sw: -1\n};\n\nvar signsY = {\n  overlay: +1,\n  selection: +1,\n  n: -1,\n  e: null,\n  s: +1,\n  w: null,\n  nw: -1,\n  ne: -1,\n  se: +1,\n  sw: +1\n};\n\nfunction type(t) {\n  return {type: t};\n}\n\n// Ignore right-click, since that should open the context menu.\nfunction defaultFilter() {\n  return !exports.event.button;\n}\n\nfunction defaultExtent() {\n  var svg = this.ownerSVGElement || this;\n  return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]];\n}\n\n// Like d3.local, but with the name “__brush” rather than auto-generated.\nfunction local$$1(node) {\n  while (!node.__brush) if (!(node = node.parentNode)) return;\n  return node.__brush;\n}\n\nfunction empty(extent) {\n  return extent[0][0] === extent[1][0]\n      || extent[0][1] === extent[1][1];\n}\n\nfunction brushSelection(node) {\n  var state = node.__brush;\n  return state ? state.dim.output(state.selection) : null;\n}\n\nfunction brushX() {\n  return brush$1(X);\n}\n\nfunction brushY() {\n  return brush$1(Y);\n}\n\nvar brush = function() {\n  return brush$1(XY);\n};\n\nfunction brush$1(dim) {\n  var extent = defaultExtent,\n      filter = defaultFilter,\n      listeners = dispatch(brush, \"start\", \"brush\", \"end\"),\n      handleSize = 6,\n      touchending;\n\n  function brush(group) {\n    var overlay = group\n        .property(\"__brush\", initialize)\n      .selectAll(\".overlay\")\n      .data([type(\"overlay\")]);\n\n    overlay.enter().append(\"rect\")\n        .attr(\"class\", \"overlay\")\n        .attr(\"pointer-events\", \"all\")\n        .attr(\"cursor\", cursors.overlay)\n      .merge(overlay)\n        .each(function() {\n          var extent = local$$1(this).extent;\n          select(this)\n              .attr(\"x\", extent[0][0])\n              .attr(\"y\", extent[0][1])\n              .attr(\"width\", extent[1][0] - extent[0][0])\n              .attr(\"height\", extent[1][1] - extent[0][1]);\n        });\n\n    group.selectAll(\".selection\")\n      .data([type(\"selection\")])\n      .enter().append(\"rect\")\n        .attr(\"class\", \"selection\")\n        .attr(\"cursor\", cursors.selection)\n        .attr(\"fill\", \"#777\")\n        .attr(\"fill-opacity\", 0.3)\n        .attr(\"stroke\", \"#fff\")\n        .attr(\"shape-rendering\", \"crispEdges\");\n\n    var handle = group.selectAll(\".handle\")\n      .data(dim.handles, function(d) { return d.type; });\n\n    handle.exit().remove();\n\n    handle.enter().append(\"rect\")\n        .attr(\"class\", function(d) { return \"handle handle--\" + d.type; })\n        .attr(\"cursor\", function(d) { return cursors[d.type]; });\n\n    group\n        .each(redraw)\n        .attr(\"fill\", \"none\")\n        .attr(\"pointer-events\", \"all\")\n        .style(\"-webkit-tap-highlight-color\", \"rgba(0,0,0,0)\")\n        .on(\"mousedown.brush touchstart.brush\", started);\n  }\n\n  brush.move = function(group, selection$$1) {\n    if (group.selection) {\n      group\n          .on(\"start.brush\", function() { emitter(this, arguments).beforestart().start(); })\n          .on(\"interrupt.brush end.brush\", function() { emitter(this, arguments).end(); })\n          .tween(\"brush\", function() {\n            var that = this,\n                state = that.__brush,\n                emit = emitter(that, arguments),\n                selection0 = state.selection,\n                selection1 = dim.input(typeof selection$$1 === \"function\" ? selection$$1.apply(this, arguments) : selection$$1, state.extent),\n                i = interpolateValue(selection0, selection1);\n\n            function tween(t) {\n              state.selection = t === 1 && empty(selection1) ? null : i(t);\n              redraw.call(that);\n              emit.brush();\n            }\n\n            return selection0 && selection1 ? tween : tween(1);\n          });\n    } else {\n      group\n          .each(function() {\n            var that = this,\n                args = arguments,\n                state = that.__brush,\n                selection1 = dim.input(typeof selection$$1 === \"function\" ? selection$$1.apply(that, args) : selection$$1, state.extent),\n                emit = emitter(that, args).beforestart();\n\n            interrupt(that);\n            state.selection = selection1 == null || empty(selection1) ? null : selection1;\n            redraw.call(that);\n            emit.start().brush().end();\n          });\n    }\n  };\n\n  function redraw() {\n    var group = select(this),\n        selection$$1 = local$$1(this).selection;\n\n    if (selection$$1) {\n      group.selectAll(\".selection\")\n          .style(\"display\", null)\n          .attr(\"x\", selection$$1[0][0])\n          .attr(\"y\", selection$$1[0][1])\n          .attr(\"width\", selection$$1[1][0] - selection$$1[0][0])\n          .attr(\"height\", selection$$1[1][1] - selection$$1[0][1]);\n\n      group.selectAll(\".handle\")\n          .style(\"display\", null)\n          .attr(\"x\", function(d) { return d.type[d.type.length - 1] === \"e\" ? selection$$1[1][0] - handleSize / 2 : selection$$1[0][0] - handleSize / 2; })\n          .attr(\"y\", function(d) { return d.type[0] === \"s\" ? selection$$1[1][1] - handleSize / 2 : selection$$1[0][1] - handleSize / 2; })\n          .attr(\"width\", function(d) { return d.type === \"n\" || d.type === \"s\" ? selection$$1[1][0] - selection$$1[0][0] + handleSize : handleSize; })\n          .attr(\"height\", function(d) { return d.type === \"e\" || d.type === \"w\" ? selection$$1[1][1] - selection$$1[0][1] + handleSize : handleSize; });\n    }\n\n    else {\n      group.selectAll(\".selection,.handle\")\n          .style(\"display\", \"none\")\n          .attr(\"x\", null)\n          .attr(\"y\", null)\n          .attr(\"width\", null)\n          .attr(\"height\", null);\n    }\n  }\n\n  function emitter(that, args) {\n    return that.__brush.emitter || new Emitter(that, args);\n  }\n\n  function Emitter(that, args) {\n    this.that = that;\n    this.args = args;\n    this.state = that.__brush;\n    this.active = 0;\n  }\n\n  Emitter.prototype = {\n    beforestart: function() {\n      if (++this.active === 1) this.state.emitter = this, this.starting = true;\n      return this;\n    },\n    start: function() {\n      if (this.starting) this.starting = false, this.emit(\"start\");\n      return this;\n    },\n    brush: function() {\n      this.emit(\"brush\");\n      return this;\n    },\n    end: function() {\n      if (--this.active === 0) delete this.state.emitter, this.emit(\"end\");\n      return this;\n    },\n    emit: function(type) {\n      customEvent(new BrushEvent(brush, type, dim.output(this.state.selection)), listeners.apply, listeners, [type, this.that, this.args]);\n    }\n  };\n\n  function started() {\n    if (exports.event.touches) { if (exports.event.changedTouches.length < exports.event.touches.length) return noevent$1(); }\n    else if (touchending) return;\n    if (!filter.apply(this, arguments)) return;\n\n    var that = this,\n        type = exports.event.target.__data__.type,\n        mode = (exports.event.metaKey ? type = \"overlay\" : type) === \"selection\" ? MODE_DRAG : (exports.event.altKey ? MODE_CENTER : MODE_HANDLE),\n        signX = dim === Y ? null : signsX[type],\n        signY = dim === X ? null : signsY[type],\n        state = local$$1(that),\n        extent = state.extent,\n        selection$$1 = state.selection,\n        W = extent[0][0], w0, w1,\n        N = extent[0][1], n0, n1,\n        E = extent[1][0], e0, e1,\n        S = extent[1][1], s0, s1,\n        dx,\n        dy,\n        moving,\n        shifting = signX && signY && exports.event.shiftKey,\n        lockX,\n        lockY,\n        point0 = mouse(that),\n        point = point0,\n        emit = emitter(that, arguments).beforestart();\n\n    if (type === \"overlay\") {\n      state.selection = selection$$1 = [\n        [w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]],\n        [e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0]\n      ];\n    } else {\n      w0 = selection$$1[0][0];\n      n0 = selection$$1[0][1];\n      e0 = selection$$1[1][0];\n      s0 = selection$$1[1][1];\n    }\n\n    w1 = w0;\n    n1 = n0;\n    e1 = e0;\n    s1 = s0;\n\n    var group = select(that)\n        .attr(\"pointer-events\", \"none\");\n\n    var overlay = group.selectAll(\".overlay\")\n        .attr(\"cursor\", cursors[type]);\n\n    if (exports.event.touches) {\n      group\n          .on(\"touchmove.brush\", moved, true)\n          .on(\"touchend.brush touchcancel.brush\", ended, true);\n    } else {\n      var view = select(exports.event.view)\n          .on(\"keydown.brush\", keydowned, true)\n          .on(\"keyup.brush\", keyupped, true)\n          .on(\"mousemove.brush\", moved, true)\n          .on(\"mouseup.brush\", ended, true);\n\n      dragDisable(exports.event.view);\n    }\n\n    nopropagation$1();\n    interrupt(that);\n    redraw.call(that);\n    emit.start();\n\n    function moved() {\n      var point1 = mouse(that);\n      if (shifting && !lockX && !lockY) {\n        if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true;\n        else lockX = true;\n      }\n      point = point1;\n      moving = true;\n      noevent$1();\n      move();\n    }\n\n    function move() {\n      var t;\n\n      dx = point[0] - point0[0];\n      dy = point[1] - point0[1];\n\n      switch (mode) {\n        case MODE_SPACE:\n        case MODE_DRAG: {\n          if (signX) dx = Math.max(W - w0, Math.min(E - e0, dx)), w1 = w0 + dx, e1 = e0 + dx;\n          if (signY) dy = Math.max(N - n0, Math.min(S - s0, dy)), n1 = n0 + dy, s1 = s0 + dy;\n          break;\n        }\n        case MODE_HANDLE: {\n          if (signX < 0) dx = Math.max(W - w0, Math.min(E - w0, dx)), w1 = w0 + dx, e1 = e0;\n          else if (signX > 0) dx = Math.max(W - e0, Math.min(E - e0, dx)), w1 = w0, e1 = e0 + dx;\n          if (signY < 0) dy = Math.max(N - n0, Math.min(S - n0, dy)), n1 = n0 + dy, s1 = s0;\n          else if (signY > 0) dy = Math.max(N - s0, Math.min(S - s0, dy)), n1 = n0, s1 = s0 + dy;\n          break;\n        }\n        case MODE_CENTER: {\n          if (signX) w1 = Math.max(W, Math.min(E, w0 - dx * signX)), e1 = Math.max(W, Math.min(E, e0 + dx * signX));\n          if (signY) n1 = Math.max(N, Math.min(S, n0 - dy * signY)), s1 = Math.max(N, Math.min(S, s0 + dy * signY));\n          break;\n        }\n      }\n\n      if (e1 < w1) {\n        signX *= -1;\n        t = w0, w0 = e0, e0 = t;\n        t = w1, w1 = e1, e1 = t;\n        if (type in flipX) overlay.attr(\"cursor\", cursors[type = flipX[type]]);\n      }\n\n      if (s1 < n1) {\n        signY *= -1;\n        t = n0, n0 = s0, s0 = t;\n        t = n1, n1 = s1, s1 = t;\n        if (type in flipY) overlay.attr(\"cursor\", cursors[type = flipY[type]]);\n      }\n\n      if (state.selection) selection$$1 = state.selection; // May be set by brush.move!\n      if (lockX) w1 = selection$$1[0][0], e1 = selection$$1[1][0];\n      if (lockY) n1 = selection$$1[0][1], s1 = selection$$1[1][1];\n\n      if (selection$$1[0][0] !== w1\n          || selection$$1[0][1] !== n1\n          || selection$$1[1][0] !== e1\n          || selection$$1[1][1] !== s1) {\n        state.selection = [[w1, n1], [e1, s1]];\n        redraw.call(that);\n        emit.brush();\n      }\n    }\n\n    function ended() {\n      nopropagation$1();\n      if (exports.event.touches) {\n        if (exports.event.touches.length) return;\n        if (touchending) clearTimeout(touchending);\n        touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!\n        group.on(\"touchmove.brush touchend.brush touchcancel.brush\", null);\n      } else {\n        yesdrag(exports.event.view, moving);\n        view.on(\"keydown.brush keyup.brush mousemove.brush mouseup.brush\", null);\n      }\n      group.attr(\"pointer-events\", \"all\");\n      overlay.attr(\"cursor\", cursors.overlay);\n      if (state.selection) selection$$1 = state.selection; // May be set by brush.move (on start)!\n      if (empty(selection$$1)) state.selection = null, redraw.call(that);\n      emit.end();\n    }\n\n    function keydowned() {\n      switch (exports.event.keyCode) {\n        case 16: { // SHIFT\n          shifting = signX && signY;\n          break;\n        }\n        case 18: { // ALT\n          if (mode === MODE_HANDLE) {\n            if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;\n            if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;\n            mode = MODE_CENTER;\n            move();\n          }\n          break;\n        }\n        case 32: { // SPACE; takes priority over ALT\n          if (mode === MODE_HANDLE || mode === MODE_CENTER) {\n            if (signX < 0) e0 = e1 - dx; else if (signX > 0) w0 = w1 - dx;\n            if (signY < 0) s0 = s1 - dy; else if (signY > 0) n0 = n1 - dy;\n            mode = MODE_SPACE;\n            overlay.attr(\"cursor\", cursors.selection);\n            move();\n          }\n          break;\n        }\n        default: return;\n      }\n      noevent$1();\n    }\n\n    function keyupped() {\n      switch (exports.event.keyCode) {\n        case 16: { // SHIFT\n          if (shifting) {\n            lockX = lockY = shifting = false;\n            move();\n          }\n          break;\n        }\n        case 18: { // ALT\n          if (mode === MODE_CENTER) {\n            if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;\n            if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;\n            mode = MODE_HANDLE;\n            move();\n          }\n          break;\n        }\n        case 32: { // SPACE\n          if (mode === MODE_SPACE) {\n            if (exports.event.altKey) {\n              if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;\n              if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;\n              mode = MODE_CENTER;\n            } else {\n              if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;\n              if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;\n              mode = MODE_HANDLE;\n            }\n            overlay.attr(\"cursor\", cursors[type]);\n            move();\n          }\n          break;\n        }\n        default: return;\n      }\n      noevent$1();\n    }\n  }\n\n  function initialize() {\n    var state = this.__brush || {selection: null};\n    state.extent = extent.apply(this, arguments);\n    state.dim = dim;\n    return state;\n  }\n\n  brush.extent = function(_) {\n    return arguments.length ? (extent = typeof _ === \"function\" ? _ : constant$4([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), brush) : extent;\n  };\n\n  brush.filter = function(_) {\n    return arguments.length ? (filter = typeof _ === \"function\" ? _ : constant$4(!!_), brush) : filter;\n  };\n\n  brush.handleSize = function(_) {\n    return arguments.length ? (handleSize = +_, brush) : handleSize;\n  };\n\n  brush.on = function() {\n    var value = listeners.on.apply(listeners, arguments);\n    return value === listeners ? brush : value;\n  };\n\n  return brush;\n}\n\nvar cos = Math.cos;\nvar sin = Math.sin;\nvar pi$1 = Math.PI;\nvar halfPi$1 = pi$1 / 2;\nvar tau$1 = pi$1 * 2;\nvar max$1 = Math.max;\n\nfunction compareValue(compare) {\n  return function(a, b) {\n    return compare(\n      a.source.value + a.target.value,\n      b.source.value + b.target.value\n    );\n  };\n}\n\nvar chord = function() {\n  var padAngle = 0,\n      sortGroups = null,\n      sortSubgroups = null,\n      sortChords = null;\n\n  function chord(matrix) {\n    var n = matrix.length,\n        groupSums = [],\n        groupIndex = sequence(n),\n        subgroupIndex = [],\n        chords = [],\n        groups = chords.groups = new Array(n),\n        subgroups = new Array(n * n),\n        k,\n        x,\n        x0,\n        dx,\n        i,\n        j;\n\n    // Compute the sum.\n    k = 0, i = -1; while (++i < n) {\n      x = 0, j = -1; while (++j < n) {\n        x += matrix[i][j];\n      }\n      groupSums.push(x);\n      subgroupIndex.push(sequence(n));\n      k += x;\n    }\n\n    // Sort groups…\n    if (sortGroups) groupIndex.sort(function(a, b) {\n      return sortGroups(groupSums[a], groupSums[b]);\n    });\n\n    // Sort subgroups…\n    if (sortSubgroups) subgroupIndex.forEach(function(d, i) {\n      d.sort(function(a, b) {\n        return sortSubgroups(matrix[i][a], matrix[i][b]);\n      });\n    });\n\n    // Convert the sum to scaling factor for [0, 2pi].\n    // TODO Allow start and end angle to be specified?\n    // TODO Allow padding to be specified as percentage?\n    k = max$1(0, tau$1 - padAngle * n) / k;\n    dx = k ? padAngle : tau$1 / n;\n\n    // Compute the start and end angle for each group and subgroup.\n    // Note: Opera has a bug reordering object literal properties!\n    x = 0, i = -1; while (++i < n) {\n      x0 = x, j = -1; while (++j < n) {\n        var di = groupIndex[i],\n            dj = subgroupIndex[di][j],\n            v = matrix[di][dj],\n            a0 = x,\n            a1 = x += v * k;\n        subgroups[dj * n + di] = {\n          index: di,\n          subindex: dj,\n          startAngle: a0,\n          endAngle: a1,\n          value: v\n        };\n      }\n      groups[di] = {\n        index: di,\n        startAngle: x0,\n        endAngle: x,\n        value: groupSums[di]\n      };\n      x += dx;\n    }\n\n    // Generate chords for each (non-empty) subgroup-subgroup link.\n    i = -1; while (++i < n) {\n      j = i - 1; while (++j < n) {\n        var source = subgroups[j * n + i],\n            target = subgroups[i * n + j];\n        if (source.value || target.value) {\n          chords.push(source.value < target.value\n              ? {source: target, target: source}\n              : {source: source, target: target});\n        }\n      }\n    }\n\n    return sortChords ? chords.sort(sortChords) : chords;\n  }\n\n  chord.padAngle = function(_) {\n    return arguments.length ? (padAngle = max$1(0, _), chord) : padAngle;\n  };\n\n  chord.sortGroups = function(_) {\n    return arguments.length ? (sortGroups = _, chord) : sortGroups;\n  };\n\n  chord.sortSubgroups = function(_) {\n    return arguments.length ? (sortSubgroups = _, chord) : sortSubgroups;\n  };\n\n  chord.sortChords = function(_) {\n    return arguments.length ? (_ == null ? sortChords = null : (sortChords = compareValue(_))._ = _, chord) : sortChords && sortChords._;\n  };\n\n  return chord;\n};\n\nvar slice$2 = Array.prototype.slice;\n\nvar constant$5 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar pi$2 = Math.PI;\nvar tau$2 = 2 * pi$2;\nvar epsilon$1 = 1e-6;\nvar tauEpsilon = tau$2 - epsilon$1;\n\nfunction Path() {\n  this._x0 = this._y0 = // start of current subpath\n  this._x1 = this._y1 = null; // end of current subpath\n  this._ = \"\";\n}\n\nfunction path() {\n  return new Path;\n}\n\nPath.prototype = path.prototype = {\n  constructor: Path,\n  moveTo: function(x, y) {\n    this._ += \"M\" + (this._x0 = this._x1 = +x) + \",\" + (this._y0 = this._y1 = +y);\n  },\n  closePath: function() {\n    if (this._x1 !== null) {\n      this._x1 = this._x0, this._y1 = this._y0;\n      this._ += \"Z\";\n    }\n  },\n  lineTo: function(x, y) {\n    this._ += \"L\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n  },\n  quadraticCurveTo: function(x1, y1, x, y) {\n    this._ += \"Q\" + (+x1) + \",\" + (+y1) + \",\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n  },\n  bezierCurveTo: function(x1, y1, x2, y2, x, y) {\n    this._ += \"C\" + (+x1) + \",\" + (+y1) + \",\" + (+x2) + \",\" + (+y2) + \",\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n  },\n  arcTo: function(x1, y1, x2, y2, r) {\n    x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;\n    var x0 = this._x1,\n        y0 = this._y1,\n        x21 = x2 - x1,\n        y21 = y2 - y1,\n        x01 = x0 - x1,\n        y01 = y0 - y1,\n        l01_2 = x01 * x01 + y01 * y01;\n\n    // Is the radius negative? Error.\n    if (r < 0) throw new Error(\"negative radius: \" + r);\n\n    // Is this path empty? Move to (x1,y1).\n    if (this._x1 === null) {\n      this._ += \"M\" + (this._x1 = x1) + \",\" + (this._y1 = y1);\n    }\n\n    // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.\n    else if (!(l01_2 > epsilon$1)) {}\n\n    // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?\n    // Equivalently, is (x1,y1) coincident with (x2,y2)?\n    // Or, is the radius zero? Line to (x1,y1).\n    else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon$1) || !r) {\n      this._ += \"L\" + (this._x1 = x1) + \",\" + (this._y1 = y1);\n    }\n\n    // Otherwise, draw an arc!\n    else {\n      var x20 = x2 - x0,\n          y20 = y2 - y0,\n          l21_2 = x21 * x21 + y21 * y21,\n          l20_2 = x20 * x20 + y20 * y20,\n          l21 = Math.sqrt(l21_2),\n          l01 = Math.sqrt(l01_2),\n          l = r * Math.tan((pi$2 - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),\n          t01 = l / l01,\n          t21 = l / l21;\n\n      // If the start tangent is not coincident with (x0,y0), line to.\n      if (Math.abs(t01 - 1) > epsilon$1) {\n        this._ += \"L\" + (x1 + t01 * x01) + \",\" + (y1 + t01 * y01);\n      }\n\n      this._ += \"A\" + r + \",\" + r + \",0,0,\" + (+(y01 * x20 > x01 * y20)) + \",\" + (this._x1 = x1 + t21 * x21) + \",\" + (this._y1 = y1 + t21 * y21);\n    }\n  },\n  arc: function(x, y, r, a0, a1, ccw) {\n    x = +x, y = +y, r = +r;\n    var dx = r * Math.cos(a0),\n        dy = r * Math.sin(a0),\n        x0 = x + dx,\n        y0 = y + dy,\n        cw = 1 ^ ccw,\n        da = ccw ? a0 - a1 : a1 - a0;\n\n    // Is the radius negative? Error.\n    if (r < 0) throw new Error(\"negative radius: \" + r);\n\n    // Is this path empty? Move to (x0,y0).\n    if (this._x1 === null) {\n      this._ += \"M\" + x0 + \",\" + y0;\n    }\n\n    // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).\n    else if (Math.abs(this._x1 - x0) > epsilon$1 || Math.abs(this._y1 - y0) > epsilon$1) {\n      this._ += \"L\" + x0 + \",\" + y0;\n    }\n\n    // Is this arc empty? We’re done.\n    if (!r) return;\n\n    // Does the angle go the wrong way? Flip the direction.\n    if (da < 0) da = da % tau$2 + tau$2;\n\n    // Is this a complete circle? Draw two arcs to complete the circle.\n    if (da > tauEpsilon) {\n      this._ += \"A\" + r + \",\" + r + \",0,1,\" + cw + \",\" + (x - dx) + \",\" + (y - dy) + \"A\" + r + \",\" + r + \",0,1,\" + cw + \",\" + (this._x1 = x0) + \",\" + (this._y1 = y0);\n    }\n\n    // Is this arc non-empty? Draw an arc!\n    else if (da > epsilon$1) {\n      this._ += \"A\" + r + \",\" + r + \",0,\" + (+(da >= pi$2)) + \",\" + cw + \",\" + (this._x1 = x + r * Math.cos(a1)) + \",\" + (this._y1 = y + r * Math.sin(a1));\n    }\n  },\n  rect: function(x, y, w, h) {\n    this._ += \"M\" + (this._x0 = this._x1 = +x) + \",\" + (this._y0 = this._y1 = +y) + \"h\" + (+w) + \"v\" + (+h) + \"h\" + (-w) + \"Z\";\n  },\n  toString: function() {\n    return this._;\n  }\n};\n\nfunction defaultSource(d) {\n  return d.source;\n}\n\nfunction defaultTarget(d) {\n  return d.target;\n}\n\nfunction defaultRadius(d) {\n  return d.radius;\n}\n\nfunction defaultStartAngle(d) {\n  return d.startAngle;\n}\n\nfunction defaultEndAngle(d) {\n  return d.endAngle;\n}\n\nvar ribbon = function() {\n  var source = defaultSource,\n      target = defaultTarget,\n      radius = defaultRadius,\n      startAngle = defaultStartAngle,\n      endAngle = defaultEndAngle,\n      context = null;\n\n  function ribbon() {\n    var buffer,\n        argv = slice$2.call(arguments),\n        s = source.apply(this, argv),\n        t = target.apply(this, argv),\n        sr = +radius.apply(this, (argv[0] = s, argv)),\n        sa0 = startAngle.apply(this, argv) - halfPi$1,\n        sa1 = endAngle.apply(this, argv) - halfPi$1,\n        sx0 = sr * cos(sa0),\n        sy0 = sr * sin(sa0),\n        tr = +radius.apply(this, (argv[0] = t, argv)),\n        ta0 = startAngle.apply(this, argv) - halfPi$1,\n        ta1 = endAngle.apply(this, argv) - halfPi$1;\n\n    if (!context) context = buffer = path();\n\n    context.moveTo(sx0, sy0);\n    context.arc(0, 0, sr, sa0, sa1);\n    if (sa0 !== ta0 || sa1 !== ta1) { // TODO sr !== tr?\n      context.quadraticCurveTo(0, 0, tr * cos(ta0), tr * sin(ta0));\n      context.arc(0, 0, tr, ta0, ta1);\n    }\n    context.quadraticCurveTo(0, 0, sx0, sy0);\n    context.closePath();\n\n    if (buffer) return context = null, buffer + \"\" || null;\n  }\n\n  ribbon.radius = function(_) {\n    return arguments.length ? (radius = typeof _ === \"function\" ? _ : constant$5(+_), ribbon) : radius;\n  };\n\n  ribbon.startAngle = function(_) {\n    return arguments.length ? (startAngle = typeof _ === \"function\" ? _ : constant$5(+_), ribbon) : startAngle;\n  };\n\n  ribbon.endAngle = function(_) {\n    return arguments.length ? (endAngle = typeof _ === \"function\" ? _ : constant$5(+_), ribbon) : endAngle;\n  };\n\n  ribbon.source = function(_) {\n    return arguments.length ? (source = _, ribbon) : source;\n  };\n\n  ribbon.target = function(_) {\n    return arguments.length ? (target = _, ribbon) : target;\n  };\n\n  ribbon.context = function(_) {\n    return arguments.length ? ((context = _ == null ? null : _), ribbon) : context;\n  };\n\n  return ribbon;\n};\n\nvar prefix = \"$\";\n\nfunction Map() {}\n\nMap.prototype = map$1.prototype = {\n  constructor: Map,\n  has: function(key) {\n    return (prefix + key) in this;\n  },\n  get: function(key) {\n    return this[prefix + key];\n  },\n  set: function(key, value) {\n    this[prefix + key] = value;\n    return this;\n  },\n  remove: function(key) {\n    var property = prefix + key;\n    return property in this && delete this[property];\n  },\n  clear: function() {\n    for (var property in this) if (property[0] === prefix) delete this[property];\n  },\n  keys: function() {\n    var keys = [];\n    for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));\n    return keys;\n  },\n  values: function() {\n    var values = [];\n    for (var property in this) if (property[0] === prefix) values.push(this[property]);\n    return values;\n  },\n  entries: function() {\n    var entries = [];\n    for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]});\n    return entries;\n  },\n  size: function() {\n    var size = 0;\n    for (var property in this) if (property[0] === prefix) ++size;\n    return size;\n  },\n  empty: function() {\n    for (var property in this) if (property[0] === prefix) return false;\n    return true;\n  },\n  each: function(f) {\n    for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);\n  }\n};\n\nfunction map$1(object, f) {\n  var map = new Map;\n\n  // Copy constructor.\n  if (object instanceof Map) object.each(function(value, key) { map.set(key, value); });\n\n  // Index array by numeric index or specified key function.\n  else if (Array.isArray(object)) {\n    var i = -1,\n        n = object.length,\n        o;\n\n    if (f == null) while (++i < n) map.set(i, object[i]);\n    else while (++i < n) map.set(f(o = object[i], i, object), o);\n  }\n\n  // Convert object to map.\n  else if (object) for (var key in object) map.set(key, object[key]);\n\n  return map;\n}\n\nvar nest = function() {\n  var keys = [],\n      sortKeys = [],\n      sortValues,\n      rollup,\n      nest;\n\n  function apply(array, depth, createResult, setResult) {\n    if (depth >= keys.length) return rollup != null\n        ? rollup(array) : (sortValues != null\n        ? array.sort(sortValues)\n        : array);\n\n    var i = -1,\n        n = array.length,\n        key = keys[depth++],\n        keyValue,\n        value,\n        valuesByKey = map$1(),\n        values,\n        result = createResult();\n\n    while (++i < n) {\n      if (values = valuesByKey.get(keyValue = key(value = array[i]) + \"\")) {\n        values.push(value);\n      } else {\n        valuesByKey.set(keyValue, [value]);\n      }\n    }\n\n    valuesByKey.each(function(values, key) {\n      setResult(result, key, apply(values, depth, createResult, setResult));\n    });\n\n    return result;\n  }\n\n  function entries(map, depth) {\n    if (++depth > keys.length) return map;\n    var array, sortKey = sortKeys[depth - 1];\n    if (rollup != null && depth >= keys.length) array = map.entries();\n    else array = [], map.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); });\n    return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array;\n  }\n\n  return nest = {\n    object: function(array) { return apply(array, 0, createObject, setObject); },\n    map: function(array) { return apply(array, 0, createMap, setMap); },\n    entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); },\n    key: function(d) { keys.push(d); return nest; },\n    sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; },\n    sortValues: function(order) { sortValues = order; return nest; },\n    rollup: function(f) { rollup = f; return nest; }\n  };\n};\n\nfunction createObject() {\n  return {};\n}\n\nfunction setObject(object, key, value) {\n  object[key] = value;\n}\n\nfunction createMap() {\n  return map$1();\n}\n\nfunction setMap(map, key, value) {\n  map.set(key, value);\n}\n\nfunction Set() {}\n\nvar proto = map$1.prototype;\n\nSet.prototype = set$2.prototype = {\n  constructor: Set,\n  has: proto.has,\n  add: function(value) {\n    value += \"\";\n    this[prefix + value] = value;\n    return this;\n  },\n  remove: proto.remove,\n  clear: proto.clear,\n  values: proto.keys,\n  size: proto.size,\n  empty: proto.empty,\n  each: proto.each\n};\n\nfunction set$2(object, f) {\n  var set = new Set;\n\n  // Copy constructor.\n  if (object instanceof Set) object.each(function(value) { set.add(value); });\n\n  // Otherwise, assume it’s an array.\n  else if (object) {\n    var i = -1, n = object.length;\n    if (f == null) while (++i < n) set.add(object[i]);\n    else while (++i < n) set.add(f(object[i], i, object));\n  }\n\n  return set;\n}\n\nvar keys = function(map) {\n  var keys = [];\n  for (var key in map) keys.push(key);\n  return keys;\n};\n\nvar values = function(map) {\n  var values = [];\n  for (var key in map) values.push(map[key]);\n  return values;\n};\n\nvar entries = function(map) {\n  var entries = [];\n  for (var key in map) entries.push({key: key, value: map[key]});\n  return entries;\n};\n\nfunction objectConverter(columns) {\n  return new Function(\"d\", \"return {\" + columns.map(function(name, i) {\n    return JSON.stringify(name) + \": d[\" + i + \"]\";\n  }).join(\",\") + \"}\");\n}\n\nfunction customConverter(columns, f) {\n  var object = objectConverter(columns);\n  return function(row, i) {\n    return f(object(row), i, columns);\n  };\n}\n\n// Compute unique columns in order of discovery.\nfunction inferColumns(rows) {\n  var columnSet = Object.create(null),\n      columns = [];\n\n  rows.forEach(function(row) {\n    for (var column in row) {\n      if (!(column in columnSet)) {\n        columns.push(columnSet[column] = column);\n      }\n    }\n  });\n\n  return columns;\n}\n\nvar dsv = function(delimiter) {\n  var reFormat = new RegExp(\"[\\\"\" + delimiter + \"\\n\\r]\"),\n      delimiterCode = delimiter.charCodeAt(0);\n\n  function parse(text, f) {\n    var convert, columns, rows = parseRows(text, function(row, i) {\n      if (convert) return convert(row, i - 1);\n      columns = row, convert = f ? customConverter(row, f) : objectConverter(row);\n    });\n    rows.columns = columns;\n    return rows;\n  }\n\n  function parseRows(text, f) {\n    var EOL = {}, // sentinel value for end-of-line\n        EOF = {}, // sentinel value for end-of-file\n        rows = [], // output rows\n        N = text.length,\n        I = 0, // current character index\n        n = 0, // the current line number\n        t, // the current token\n        eol; // is the current token followed by EOL?\n\n    function token() {\n      if (I >= N) return EOF; // special case: end of file\n      if (eol) return eol = false, EOL; // special case: end of line\n\n      // special case: quotes\n      var j = I, c;\n      if (text.charCodeAt(j) === 34) {\n        var i = j;\n        while (i++ < N) {\n          if (text.charCodeAt(i) === 34) {\n            if (text.charCodeAt(i + 1) !== 34) break;\n            ++i;\n          }\n        }\n        I = i + 2;\n        c = text.charCodeAt(i + 1);\n        if (c === 13) {\n          eol = true;\n          if (text.charCodeAt(i + 2) === 10) ++I;\n        } else if (c === 10) {\n          eol = true;\n        }\n        return text.slice(j + 1, i).replace(/\"\"/g, \"\\\"\");\n      }\n\n      // common case: find next delimiter or newline\n      while (I < N) {\n        var k = 1;\n        c = text.charCodeAt(I++);\n        if (c === 10) eol = true; // \\n\n        else if (c === 13) { eol = true; if (text.charCodeAt(I) === 10) ++I, ++k; } // \\r|\\r\\n\n        else if (c !== delimiterCode) continue;\n        return text.slice(j, I - k);\n      }\n\n      // special case: last token before EOF\n      return text.slice(j);\n    }\n\n    while ((t = token()) !== EOF) {\n      var a = [];\n      while (t !== EOL && t !== EOF) {\n        a.push(t);\n        t = token();\n      }\n      if (f && (a = f(a, n++)) == null) continue;\n      rows.push(a);\n    }\n\n    return rows;\n  }\n\n  function format(rows, columns) {\n    if (columns == null) columns = inferColumns(rows);\n    return [columns.map(formatValue).join(delimiter)].concat(rows.map(function(row) {\n      return columns.map(function(column) {\n        return formatValue(row[column]);\n      }).join(delimiter);\n    })).join(\"\\n\");\n  }\n\n  function formatRows(rows) {\n    return rows.map(formatRow).join(\"\\n\");\n  }\n\n  function formatRow(row) {\n    return row.map(formatValue).join(delimiter);\n  }\n\n  function formatValue(text) {\n    return text == null ? \"\"\n        : reFormat.test(text += \"\") ? \"\\\"\" + text.replace(/\\\"/g, \"\\\"\\\"\") + \"\\\"\"\n        : text;\n  }\n\n  return {\n    parse: parse,\n    parseRows: parseRows,\n    format: format,\n    formatRows: formatRows\n  };\n};\n\nvar csv = dsv(\",\");\n\nvar csvParse = csv.parse;\nvar csvParseRows = csv.parseRows;\nvar csvFormat = csv.format;\nvar csvFormatRows = csv.formatRows;\n\nvar tsv = dsv(\"\\t\");\n\nvar tsvParse = tsv.parse;\nvar tsvParseRows = tsv.parseRows;\nvar tsvFormat = tsv.format;\nvar tsvFormatRows = tsv.formatRows;\n\nvar center$1 = function(x, y) {\n  var nodes;\n\n  if (x == null) x = 0;\n  if (y == null) y = 0;\n\n  function force() {\n    var i,\n        n = nodes.length,\n        node,\n        sx = 0,\n        sy = 0;\n\n    for (i = 0; i < n; ++i) {\n      node = nodes[i], sx += node.x, sy += node.y;\n    }\n\n    for (sx = sx / n - x, sy = sy / n - y, i = 0; i < n; ++i) {\n      node = nodes[i], node.x -= sx, node.y -= sy;\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n  };\n\n  force.x = function(_) {\n    return arguments.length ? (x = +_, force) : x;\n  };\n\n  force.y = function(_) {\n    return arguments.length ? (y = +_, force) : y;\n  };\n\n  return force;\n};\n\nvar constant$6 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar jiggle = function() {\n  return (Math.random() - 0.5) * 1e-6;\n};\n\nvar tree_add = function(d) {\n  var x = +this._x.call(null, d),\n      y = +this._y.call(null, d);\n  return add(this.cover(x, y), x, y, d);\n};\n\nfunction add(tree, x, y, d) {\n  if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points\n\n  var parent,\n      node = tree._root,\n      leaf = {data: d},\n      x0 = tree._x0,\n      y0 = tree._y0,\n      x1 = tree._x1,\n      y1 = tree._y1,\n      xm,\n      ym,\n      xp,\n      yp,\n      right,\n      bottom,\n      i,\n      j;\n\n  // If the tree is empty, initialize the root as a leaf.\n  if (!node) return tree._root = leaf, tree;\n\n  // Find the existing leaf for the new point, or add it.\n  while (node.length) {\n    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;\n    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;\n    if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;\n  }\n\n  // Is the new point is exactly coincident with the existing point?\n  xp = +tree._x.call(null, node.data);\n  yp = +tree._y.call(null, node.data);\n  if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;\n\n  // Otherwise, split the leaf node until the old and new point are separated.\n  do {\n    parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);\n    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;\n    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;\n  } while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));\n  return parent[j] = node, parent[i] = leaf, tree;\n}\n\nfunction addAll(data) {\n  var d, i, n = data.length,\n      x,\n      y,\n      xz = new Array(n),\n      yz = new Array(n),\n      x0 = Infinity,\n      y0 = Infinity,\n      x1 = -Infinity,\n      y1 = -Infinity;\n\n  // Compute the points and their extent.\n  for (i = 0; i < n; ++i) {\n    if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;\n    xz[i] = x;\n    yz[i] = y;\n    if (x < x0) x0 = x;\n    if (x > x1) x1 = x;\n    if (y < y0) y0 = y;\n    if (y > y1) y1 = y;\n  }\n\n  // If there were no (valid) points, inherit the existing extent.\n  if (x1 < x0) x0 = this._x0, x1 = this._x1;\n  if (y1 < y0) y0 = this._y0, y1 = this._y1;\n\n  // Expand the tree to cover the new points.\n  this.cover(x0, y0).cover(x1, y1);\n\n  // Add the new points.\n  for (i = 0; i < n; ++i) {\n    add(this, xz[i], yz[i], data[i]);\n  }\n\n  return this;\n}\n\nvar tree_cover = function(x, y) {\n  if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points\n\n  var x0 = this._x0,\n      y0 = this._y0,\n      x1 = this._x1,\n      y1 = this._y1;\n\n  // If the quadtree has no extent, initialize them.\n  // Integer extent are necessary so that if we later double the extent,\n  // the existing quadrant boundaries don’t change due to floating point error!\n  if (isNaN(x0)) {\n    x1 = (x0 = Math.floor(x)) + 1;\n    y1 = (y0 = Math.floor(y)) + 1;\n  }\n\n  // Otherwise, double repeatedly to cover.\n  else if (x0 > x || x > x1 || y0 > y || y > y1) {\n    var z = x1 - x0,\n        node = this._root,\n        parent,\n        i;\n\n    switch (i = (y < (y0 + y1) / 2) << 1 | (x < (x0 + x1) / 2)) {\n      case 0: {\n        do parent = new Array(4), parent[i] = node, node = parent;\n        while (z *= 2, x1 = x0 + z, y1 = y0 + z, x > x1 || y > y1);\n        break;\n      }\n      case 1: {\n        do parent = new Array(4), parent[i] = node, node = parent;\n        while (z *= 2, x0 = x1 - z, y1 = y0 + z, x0 > x || y > y1);\n        break;\n      }\n      case 2: {\n        do parent = new Array(4), parent[i] = node, node = parent;\n        while (z *= 2, x1 = x0 + z, y0 = y1 - z, x > x1 || y0 > y);\n        break;\n      }\n      case 3: {\n        do parent = new Array(4), parent[i] = node, node = parent;\n        while (z *= 2, x0 = x1 - z, y0 = y1 - z, x0 > x || y0 > y);\n        break;\n      }\n    }\n\n    if (this._root && this._root.length) this._root = node;\n  }\n\n  // If the quadtree covers the point already, just return.\n  else return this;\n\n  this._x0 = x0;\n  this._y0 = y0;\n  this._x1 = x1;\n  this._y1 = y1;\n  return this;\n};\n\nvar tree_data = function() {\n  var data = [];\n  this.visit(function(node) {\n    if (!node.length) do data.push(node.data); while (node = node.next)\n  });\n  return data;\n};\n\nvar tree_extent = function(_) {\n  return arguments.length\n      ? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])\n      : isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];\n};\n\nvar Quad = function(node, x0, y0, x1, y1) {\n  this.node = node;\n  this.x0 = x0;\n  this.y0 = y0;\n  this.x1 = x1;\n  this.y1 = y1;\n};\n\nvar tree_find = function(x, y, radius) {\n  var data,\n      x0 = this._x0,\n      y0 = this._y0,\n      x1,\n      y1,\n      x2,\n      y2,\n      x3 = this._x1,\n      y3 = this._y1,\n      quads = [],\n      node = this._root,\n      q,\n      i;\n\n  if (node) quads.push(new Quad(node, x0, y0, x3, y3));\n  if (radius == null) radius = Infinity;\n  else {\n    x0 = x - radius, y0 = y - radius;\n    x3 = x + radius, y3 = y + radius;\n    radius *= radius;\n  }\n\n  while (q = quads.pop()) {\n\n    // Stop searching if this quadrant can’t contain a closer node.\n    if (!(node = q.node)\n        || (x1 = q.x0) > x3\n        || (y1 = q.y0) > y3\n        || (x2 = q.x1) < x0\n        || (y2 = q.y1) < y0) continue;\n\n    // Bisect the current quadrant.\n    if (node.length) {\n      var xm = (x1 + x2) / 2,\n          ym = (y1 + y2) / 2;\n\n      quads.push(\n        new Quad(node[3], xm, ym, x2, y2),\n        new Quad(node[2], x1, ym, xm, y2),\n        new Quad(node[1], xm, y1, x2, ym),\n        new Quad(node[0], x1, y1, xm, ym)\n      );\n\n      // Visit the closest quadrant first.\n      if (i = (y >= ym) << 1 | (x >= xm)) {\n        q = quads[quads.length - 1];\n        quads[quads.length - 1] = quads[quads.length - 1 - i];\n        quads[quads.length - 1 - i] = q;\n      }\n    }\n\n    // Visit this point. (Visiting coincident points isn’t necessary!)\n    else {\n      var dx = x - +this._x.call(null, node.data),\n          dy = y - +this._y.call(null, node.data),\n          d2 = dx * dx + dy * dy;\n      if (d2 < radius) {\n        var d = Math.sqrt(radius = d2);\n        x0 = x - d, y0 = y - d;\n        x3 = x + d, y3 = y + d;\n        data = node.data;\n      }\n    }\n  }\n\n  return data;\n};\n\nvar tree_remove = function(d) {\n  if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points\n\n  var parent,\n      node = this._root,\n      retainer,\n      previous,\n      next,\n      x0 = this._x0,\n      y0 = this._y0,\n      x1 = this._x1,\n      y1 = this._y1,\n      x,\n      y,\n      xm,\n      ym,\n      right,\n      bottom,\n      i,\n      j;\n\n  // If the tree is empty, initialize the root as a leaf.\n  if (!node) return this;\n\n  // Find the leaf node for the point.\n  // While descending, also retain the deepest parent with a non-removed sibling.\n  if (node.length) while (true) {\n    if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;\n    if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;\n    if (!(parent = node, node = node[i = bottom << 1 | right])) return this;\n    if (!node.length) break;\n    if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;\n  }\n\n  // Find the point to remove.\n  while (node.data !== d) if (!(previous = node, node = node.next)) return this;\n  if (next = node.next) delete node.next;\n\n  // If there are multiple coincident points, remove just the point.\n  if (previous) return (next ? previous.next = next : delete previous.next), this;\n\n  // If this is the root point, remove it.\n  if (!parent) return this._root = next, this;\n\n  // Remove this leaf.\n  next ? parent[i] = next : delete parent[i];\n\n  // If the parent now contains exactly one leaf, collapse superfluous parents.\n  if ((node = parent[0] || parent[1] || parent[2] || parent[3])\n      && node === (parent[3] || parent[2] || parent[1] || parent[0])\n      && !node.length) {\n    if (retainer) retainer[j] = node;\n    else this._root = node;\n  }\n\n  return this;\n};\n\nfunction removeAll(data) {\n  for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);\n  return this;\n}\n\nvar tree_root = function() {\n  return this._root;\n};\n\nvar tree_size = function() {\n  var size = 0;\n  this.visit(function(node) {\n    if (!node.length) do ++size; while (node = node.next)\n  });\n  return size;\n};\n\nvar tree_visit = function(callback) {\n  var quads = [], q, node = this._root, child, x0, y0, x1, y1;\n  if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));\n  while (q = quads.pop()) {\n    if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {\n      var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;\n      if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));\n      if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));\n      if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));\n      if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));\n    }\n  }\n  return this;\n};\n\nvar tree_visitAfter = function(callback) {\n  var quads = [], next = [], q;\n  if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));\n  while (q = quads.pop()) {\n    var node = q.node;\n    if (node.length) {\n      var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;\n      if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));\n      if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));\n      if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));\n      if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));\n    }\n    next.push(q);\n  }\n  while (q = next.pop()) {\n    callback(q.node, q.x0, q.y0, q.x1, q.y1);\n  }\n  return this;\n};\n\nfunction defaultX(d) {\n  return d[0];\n}\n\nvar tree_x = function(_) {\n  return arguments.length ? (this._x = _, this) : this._x;\n};\n\nfunction defaultY(d) {\n  return d[1];\n}\n\nvar tree_y = function(_) {\n  return arguments.length ? (this._y = _, this) : this._y;\n};\n\nfunction quadtree(nodes, x, y) {\n  var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN);\n  return nodes == null ? tree : tree.addAll(nodes);\n}\n\nfunction Quadtree(x, y, x0, y0, x1, y1) {\n  this._x = x;\n  this._y = y;\n  this._x0 = x0;\n  this._y0 = y0;\n  this._x1 = x1;\n  this._y1 = y1;\n  this._root = undefined;\n}\n\nfunction leaf_copy(leaf) {\n  var copy = {data: leaf.data}, next = copy;\n  while (leaf = leaf.next) next = next.next = {data: leaf.data};\n  return copy;\n}\n\nvar treeProto = quadtree.prototype = Quadtree.prototype;\n\ntreeProto.copy = function() {\n  var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),\n      node = this._root,\n      nodes,\n      child;\n\n  if (!node) return copy;\n\n  if (!node.length) return copy._root = leaf_copy(node), copy;\n\n  nodes = [{source: node, target: copy._root = new Array(4)}];\n  while (node = nodes.pop()) {\n    for (var i = 0; i < 4; ++i) {\n      if (child = node.source[i]) {\n        if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)});\n        else node.target[i] = leaf_copy(child);\n      }\n    }\n  }\n\n  return copy;\n};\n\ntreeProto.add = tree_add;\ntreeProto.addAll = addAll;\ntreeProto.cover = tree_cover;\ntreeProto.data = tree_data;\ntreeProto.extent = tree_extent;\ntreeProto.find = tree_find;\ntreeProto.remove = tree_remove;\ntreeProto.removeAll = removeAll;\ntreeProto.root = tree_root;\ntreeProto.size = tree_size;\ntreeProto.visit = tree_visit;\ntreeProto.visitAfter = tree_visitAfter;\ntreeProto.x = tree_x;\ntreeProto.y = tree_y;\n\nfunction x(d) {\n  return d.x + d.vx;\n}\n\nfunction y(d) {\n  return d.y + d.vy;\n}\n\nvar collide = function(radius) {\n  var nodes,\n      radii,\n      strength = 1,\n      iterations = 1;\n\n  if (typeof radius !== \"function\") radius = constant$6(radius == null ? 1 : +radius);\n\n  function force() {\n    var i, n = nodes.length,\n        tree,\n        node,\n        xi,\n        yi,\n        ri,\n        ri2;\n\n    for (var k = 0; k < iterations; ++k) {\n      tree = quadtree(nodes, x, y).visitAfter(prepare);\n      for (i = 0; i < n; ++i) {\n        node = nodes[i];\n        ri = radii[node.index], ri2 = ri * ri;\n        xi = node.x + node.vx;\n        yi = node.y + node.vy;\n        tree.visit(apply);\n      }\n    }\n\n    function apply(quad, x0, y0, x1, y1) {\n      var data = quad.data, rj = quad.r, r = ri + rj;\n      if (data) {\n        if (data.index > node.index) {\n          var x = xi - data.x - data.vx,\n              y = yi - data.y - data.vy,\n              l = x * x + y * y;\n          if (l < r * r) {\n            if (x === 0) x = jiggle(), l += x * x;\n            if (y === 0) y = jiggle(), l += y * y;\n            l = (r - (l = Math.sqrt(l))) / l * strength;\n            node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj));\n            node.vy += (y *= l) * r;\n            data.vx -= x * (r = 1 - r);\n            data.vy -= y * r;\n          }\n        }\n        return;\n      }\n      return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r;\n    }\n  }\n\n  function prepare(quad) {\n    if (quad.data) return quad.r = radii[quad.data.index];\n    for (var i = quad.r = 0; i < 4; ++i) {\n      if (quad[i] && quad[i].r > quad.r) {\n        quad.r = quad[i].r;\n      }\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length, node;\n    radii = new Array(n);\n    for (i = 0; i < n; ++i) node = nodes[i], radii[node.index] = +radius(node, i, nodes);\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.iterations = function(_) {\n    return arguments.length ? (iterations = +_, force) : iterations;\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = +_, force) : strength;\n  };\n\n  force.radius = function(_) {\n    return arguments.length ? (radius = typeof _ === \"function\" ? _ : constant$6(+_), initialize(), force) : radius;\n  };\n\n  return force;\n};\n\nfunction index(d) {\n  return d.index;\n}\n\nfunction find(nodeById, nodeId) {\n  var node = nodeById.get(nodeId);\n  if (!node) throw new Error(\"missing: \" + nodeId);\n  return node;\n}\n\nvar link = function(links) {\n  var id = index,\n      strength = defaultStrength,\n      strengths,\n      distance = constant$6(30),\n      distances,\n      nodes,\n      count,\n      bias,\n      iterations = 1;\n\n  if (links == null) links = [];\n\n  function defaultStrength(link) {\n    return 1 / Math.min(count[link.source.index], count[link.target.index]);\n  }\n\n  function force(alpha) {\n    for (var k = 0, n = links.length; k < iterations; ++k) {\n      for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {\n        link = links[i], source = link.source, target = link.target;\n        x = target.x + target.vx - source.x - source.vx || jiggle();\n        y = target.y + target.vy - source.y - source.vy || jiggle();\n        l = Math.sqrt(x * x + y * y);\n        l = (l - distances[i]) / l * alpha * strengths[i];\n        x *= l, y *= l;\n        target.vx -= x * (b = bias[i]);\n        target.vy -= y * b;\n        source.vx += x * (b = 1 - b);\n        source.vy += y * b;\n      }\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n\n    var i,\n        n = nodes.length,\n        m = links.length,\n        nodeById = map$1(nodes, id),\n        link;\n\n    for (i = 0, count = new Array(n); i < m; ++i) {\n      link = links[i], link.index = i;\n      if (typeof link.source !== \"object\") link.source = find(nodeById, link.source);\n      if (typeof link.target !== \"object\") link.target = find(nodeById, link.target);\n      count[link.source.index] = (count[link.source.index] || 0) + 1;\n      count[link.target.index] = (count[link.target.index] || 0) + 1;\n    }\n\n    for (i = 0, bias = new Array(m); i < m; ++i) {\n      link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);\n    }\n\n    strengths = new Array(m), initializeStrength();\n    distances = new Array(m), initializeDistance();\n  }\n\n  function initializeStrength() {\n    if (!nodes) return;\n\n    for (var i = 0, n = links.length; i < n; ++i) {\n      strengths[i] = +strength(links[i], i, links);\n    }\n  }\n\n  function initializeDistance() {\n    if (!nodes) return;\n\n    for (var i = 0, n = links.length; i < n; ++i) {\n      distances[i] = +distance(links[i], i, links);\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.links = function(_) {\n    return arguments.length ? (links = _, initialize(), force) : links;\n  };\n\n  force.id = function(_) {\n    return arguments.length ? (id = _, force) : id;\n  };\n\n  force.iterations = function(_) {\n    return arguments.length ? (iterations = +_, force) : iterations;\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$6(+_), initializeStrength(), force) : strength;\n  };\n\n  force.distance = function(_) {\n    return arguments.length ? (distance = typeof _ === \"function\" ? _ : constant$6(+_), initializeDistance(), force) : distance;\n  };\n\n  return force;\n};\n\nfunction x$1(d) {\n  return d.x;\n}\n\nfunction y$1(d) {\n  return d.y;\n}\n\nvar initialRadius = 10;\nvar initialAngle = Math.PI * (3 - Math.sqrt(5));\n\nvar simulation = function(nodes) {\n  var simulation,\n      alpha = 1,\n      alphaMin = 0.001,\n      alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),\n      alphaTarget = 0,\n      velocityDecay = 0.6,\n      forces = map$1(),\n      stepper = timer(step),\n      event = dispatch(\"tick\", \"end\");\n\n  if (nodes == null) nodes = [];\n\n  function step() {\n    tick();\n    event.call(\"tick\", simulation);\n    if (alpha < alphaMin) {\n      stepper.stop();\n      event.call(\"end\", simulation);\n    }\n  }\n\n  function tick() {\n    var i, n = nodes.length, node;\n\n    alpha += (alphaTarget - alpha) * alphaDecay;\n\n    forces.each(function(force) {\n      force(alpha);\n    });\n\n    for (i = 0; i < n; ++i) {\n      node = nodes[i];\n      if (node.fx == null) node.x += node.vx *= velocityDecay;\n      else node.x = node.fx, node.vx = 0;\n      if (node.fy == null) node.y += node.vy *= velocityDecay;\n      else node.y = node.fy, node.vy = 0;\n    }\n  }\n\n  function initializeNodes() {\n    for (var i = 0, n = nodes.length, node; i < n; ++i) {\n      node = nodes[i], node.index = i;\n      if (isNaN(node.x) || isNaN(node.y)) {\n        var radius = initialRadius * Math.sqrt(i), angle = i * initialAngle;\n        node.x = radius * Math.cos(angle);\n        node.y = radius * Math.sin(angle);\n      }\n      if (isNaN(node.vx) || isNaN(node.vy)) {\n        node.vx = node.vy = 0;\n      }\n    }\n  }\n\n  function initializeForce(force) {\n    if (force.initialize) force.initialize(nodes);\n    return force;\n  }\n\n  initializeNodes();\n\n  return simulation = {\n    tick: tick,\n\n    restart: function() {\n      return stepper.restart(step), simulation;\n    },\n\n    stop: function() {\n      return stepper.stop(), simulation;\n    },\n\n    nodes: function(_) {\n      return arguments.length ? (nodes = _, initializeNodes(), forces.each(initializeForce), simulation) : nodes;\n    },\n\n    alpha: function(_) {\n      return arguments.length ? (alpha = +_, simulation) : alpha;\n    },\n\n    alphaMin: function(_) {\n      return arguments.length ? (alphaMin = +_, simulation) : alphaMin;\n    },\n\n    alphaDecay: function(_) {\n      return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;\n    },\n\n    alphaTarget: function(_) {\n      return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;\n    },\n\n    velocityDecay: function(_) {\n      return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;\n    },\n\n    force: function(name, _) {\n      return arguments.length > 1 ? ((_ == null ? forces.remove(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);\n    },\n\n    find: function(x, y, radius) {\n      var i = 0,\n          n = nodes.length,\n          dx,\n          dy,\n          d2,\n          node,\n          closest;\n\n      if (radius == null) radius = Infinity;\n      else radius *= radius;\n\n      for (i = 0; i < n; ++i) {\n        node = nodes[i];\n        dx = x - node.x;\n        dy = y - node.y;\n        d2 = dx * dx + dy * dy;\n        if (d2 < radius) closest = node, radius = d2;\n      }\n\n      return closest;\n    },\n\n    on: function(name, _) {\n      return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);\n    }\n  };\n};\n\nvar manyBody = function() {\n  var nodes,\n      node,\n      alpha,\n      strength = constant$6(-30),\n      strengths,\n      distanceMin2 = 1,\n      distanceMax2 = Infinity,\n      theta2 = 0.81;\n\n  function force(_) {\n    var i, n = nodes.length, tree = quadtree(nodes, x$1, y$1).visitAfter(accumulate);\n    for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length, node;\n    strengths = new Array(n);\n    for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes);\n  }\n\n  function accumulate(quad) {\n    var strength = 0, q, c, x$$1, y$$1, i;\n\n    // For internal nodes, accumulate forces from child quadrants.\n    if (quad.length) {\n      for (x$$1 = y$$1 = i = 0; i < 4; ++i) {\n        if ((q = quad[i]) && (c = q.value)) {\n          strength += c, x$$1 += c * q.x, y$$1 += c * q.y;\n        }\n      }\n      quad.x = x$$1 / strength;\n      quad.y = y$$1 / strength;\n    }\n\n    // For leaf nodes, accumulate forces from coincident quadrants.\n    else {\n      q = quad;\n      q.x = q.data.x;\n      q.y = q.data.y;\n      do strength += strengths[q.data.index];\n      while (q = q.next);\n    }\n\n    quad.value = strength;\n  }\n\n  function apply(quad, x1, _, x2) {\n    if (!quad.value) return true;\n\n    var x$$1 = quad.x - node.x,\n        y$$1 = quad.y - node.y,\n        w = x2 - x1,\n        l = x$$1 * x$$1 + y$$1 * y$$1;\n\n    // Apply the Barnes-Hut approximation if possible.\n    // Limit forces for very close nodes; randomize direction if coincident.\n    if (w * w / theta2 < l) {\n      if (l < distanceMax2) {\n        if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1;\n        if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1;\n        if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);\n        node.vx += x$$1 * quad.value * alpha / l;\n        node.vy += y$$1 * quad.value * alpha / l;\n      }\n      return true;\n    }\n\n    // Otherwise, process points directly.\n    else if (quad.length || l >= distanceMax2) return;\n\n    // Limit forces for very close nodes; randomize direction if coincident.\n    if (quad.data !== node || quad.next) {\n      if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1;\n      if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1;\n      if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);\n    }\n\n    do if (quad.data !== node) {\n      w = strengths[quad.data.index] * alpha / l;\n      node.vx += x$$1 * w;\n      node.vy += y$$1 * w;\n    } while (quad = quad.next);\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$6(+_), initialize(), force) : strength;\n  };\n\n  force.distanceMin = function(_) {\n    return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);\n  };\n\n  force.distanceMax = function(_) {\n    return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);\n  };\n\n  force.theta = function(_) {\n    return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);\n  };\n\n  return force;\n};\n\nvar x$2 = function(x) {\n  var strength = constant$6(0.1),\n      nodes,\n      strengths,\n      xz;\n\n  if (typeof x !== \"function\") x = constant$6(x == null ? 0 : +x);\n\n  function force(alpha) {\n    for (var i = 0, n = nodes.length, node; i < n; ++i) {\n      node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha;\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length;\n    strengths = new Array(n);\n    xz = new Array(n);\n    for (i = 0; i < n; ++i) {\n      strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$6(+_), initialize(), force) : strength;\n  };\n\n  force.x = function(_) {\n    return arguments.length ? (x = typeof _ === \"function\" ? _ : constant$6(+_), initialize(), force) : x;\n  };\n\n  return force;\n};\n\nvar y$2 = function(y) {\n  var strength = constant$6(0.1),\n      nodes,\n      strengths,\n      yz;\n\n  if (typeof y !== \"function\") y = constant$6(y == null ? 0 : +y);\n\n  function force(alpha) {\n    for (var i = 0, n = nodes.length, node; i < n; ++i) {\n      node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha;\n    }\n  }\n\n  function initialize() {\n    if (!nodes) return;\n    var i, n = nodes.length;\n    strengths = new Array(n);\n    yz = new Array(n);\n    for (i = 0; i < n; ++i) {\n      strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);\n    }\n  }\n\n  force.initialize = function(_) {\n    nodes = _;\n    initialize();\n  };\n\n  force.strength = function(_) {\n    return arguments.length ? (strength = typeof _ === \"function\" ? _ : constant$6(+_), initialize(), force) : strength;\n  };\n\n  force.y = function(_) {\n    return arguments.length ? (y = typeof _ === \"function\" ? _ : constant$6(+_), initialize(), force) : y;\n  };\n\n  return force;\n};\n\n// Computes the decimal coefficient and exponent of the specified number x with\n// significant digits p, where x is positive and p is in [1, 21] or undefined.\n// For example, formatDecimal(1.23) returns [\"123\", 0].\nvar formatDecimal = function(x, p) {\n  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf(\"e\")) < 0) return null; // NaN, ±Infinity\n  var i, coefficient = x.slice(0, i);\n\n  // The string returned by toExponential either has the form \\d\\.\\d+e[-+]\\d+\n  // (e.g., 1.2e+3) or the form \\de[-+]\\d+ (e.g., 1e+3).\n  return [\n    coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,\n    +x.slice(i + 1)\n  ];\n};\n\nvar exponent$1 = function(x) {\n  return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;\n};\n\nvar formatGroup = function(grouping, thousands) {\n  return function(value, width) {\n    var i = value.length,\n        t = [],\n        j = 0,\n        g = grouping[0],\n        length = 0;\n\n    while (i > 0 && g > 0) {\n      if (length + g + 1 > width) g = Math.max(1, width - length);\n      t.push(value.substring(i -= g, i + g));\n      if ((length += g + 1) > width) break;\n      g = grouping[j = (j + 1) % grouping.length];\n    }\n\n    return t.reverse().join(thousands);\n  };\n};\n\nvar formatNumerals = function(numerals) {\n  return function(value) {\n    return value.replace(/[0-9]/g, function(i) {\n      return numerals[+i];\n    });\n  };\n};\n\nvar formatDefault = function(x, p) {\n  x = x.toPrecision(p);\n\n  out: for (var n = x.length, i = 1, i0 = -1, i1; i < n; ++i) {\n    switch (x[i]) {\n      case \".\": i0 = i1 = i; break;\n      case \"0\": if (i0 === 0) i0 = i; i1 = i; break;\n      case \"e\": break out;\n      default: if (i0 > 0) i0 = 0; break;\n    }\n  }\n\n  return i0 > 0 ? x.slice(0, i0) + x.slice(i1 + 1) : x;\n};\n\nvar prefixExponent;\n\nvar formatPrefixAuto = function(x, p) {\n  var d = formatDecimal(x, p);\n  if (!d) return x + \"\";\n  var coefficient = d[0],\n      exponent = d[1],\n      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,\n      n = coefficient.length;\n  return i === n ? coefficient\n      : i > n ? coefficient + new Array(i - n + 1).join(\"0\")\n      : i > 0 ? coefficient.slice(0, i) + \".\" + coefficient.slice(i)\n      : \"0.\" + new Array(1 - i).join(\"0\") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!\n};\n\nvar formatRounded = function(x, p) {\n  var d = formatDecimal(x, p);\n  if (!d) return x + \"\";\n  var coefficient = d[0],\n      exponent = d[1];\n  return exponent < 0 ? \"0.\" + new Array(-exponent).join(\"0\") + coefficient\n      : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + \".\" + coefficient.slice(exponent + 1)\n      : coefficient + new Array(exponent - coefficient.length + 2).join(\"0\");\n};\n\nvar formatTypes = {\n  \"\": formatDefault,\n  \"%\": function(x, p) { return (x * 100).toFixed(p); },\n  \"b\": function(x) { return Math.round(x).toString(2); },\n  \"c\": function(x) { return x + \"\"; },\n  \"d\": function(x) { return Math.round(x).toString(10); },\n  \"e\": function(x, p) { return x.toExponential(p); },\n  \"f\": function(x, p) { return x.toFixed(p); },\n  \"g\": function(x, p) { return x.toPrecision(p); },\n  \"o\": function(x) { return Math.round(x).toString(8); },\n  \"p\": function(x, p) { return formatRounded(x * 100, p); },\n  \"r\": formatRounded,\n  \"s\": formatPrefixAuto,\n  \"X\": function(x) { return Math.round(x).toString(16).toUpperCase(); },\n  \"x\": function(x) { return Math.round(x).toString(16); }\n};\n\n// [[fill]align][sign][symbol][0][width][,][.precision][type]\nvar re = /^(?:(.)?([<>=^]))?([+\\-\\( ])?([$#])?(0)?(\\d+)?(,)?(\\.\\d+)?([a-z%])?$/i;\n\nfunction formatSpecifier(specifier) {\n  return new FormatSpecifier(specifier);\n}\n\nformatSpecifier.prototype = FormatSpecifier.prototype; // instanceof\n\nfunction FormatSpecifier(specifier) {\n  if (!(match = re.exec(specifier))) throw new Error(\"invalid format: \" + specifier);\n\n  var match,\n      fill = match[1] || \" \",\n      align = match[2] || \">\",\n      sign = match[3] || \"-\",\n      symbol = match[4] || \"\",\n      zero = !!match[5],\n      width = match[6] && +match[6],\n      comma = !!match[7],\n      precision = match[8] && +match[8].slice(1),\n      type = match[9] || \"\";\n\n  // The \"n\" type is an alias for \",g\".\n  if (type === \"n\") comma = true, type = \"g\";\n\n  // Map invalid types to the default format.\n  else if (!formatTypes[type]) type = \"\";\n\n  // If zero fill is specified, padding goes after sign and before digits.\n  if (zero || (fill === \"0\" && align === \"=\")) zero = true, fill = \"0\", align = \"=\";\n\n  this.fill = fill;\n  this.align = align;\n  this.sign = sign;\n  this.symbol = symbol;\n  this.zero = zero;\n  this.width = width;\n  this.comma = comma;\n  this.precision = precision;\n  this.type = type;\n}\n\nFormatSpecifier.prototype.toString = function() {\n  return this.fill\n      + this.align\n      + this.sign\n      + this.symbol\n      + (this.zero ? \"0\" : \"\")\n      + (this.width == null ? \"\" : Math.max(1, this.width | 0))\n      + (this.comma ? \",\" : \"\")\n      + (this.precision == null ? \"\" : \".\" + Math.max(0, this.precision | 0))\n      + this.type;\n};\n\nvar identity$3 = function(x) {\n  return x;\n};\n\nvar prefixes = [\"y\",\"z\",\"a\",\"f\",\"p\",\"n\",\"\\xB5\",\"m\",\"\",\"k\",\"M\",\"G\",\"T\",\"P\",\"E\",\"Z\",\"Y\"];\n\nvar formatLocale = function(locale) {\n  var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3,\n      currency = locale.currency,\n      decimal = locale.decimal,\n      numerals = locale.numerals ? formatNumerals(locale.numerals) : identity$3;\n\n  function newFormat(specifier) {\n    specifier = formatSpecifier(specifier);\n\n    var fill = specifier.fill,\n        align = specifier.align,\n        sign = specifier.sign,\n        symbol = specifier.symbol,\n        zero = specifier.zero,\n        width = specifier.width,\n        comma = specifier.comma,\n        precision = specifier.precision,\n        type = specifier.type;\n\n    // Compute the prefix and suffix.\n    // For SI-prefix, the suffix is lazily computed.\n    var prefix = symbol === \"$\" ? currency[0] : symbol === \"#\" && /[boxX]/.test(type) ? \"0\" + type.toLowerCase() : \"\",\n        suffix = symbol === \"$\" ? currency[1] : /[%p]/.test(type) ? \"%\" : \"\";\n\n    // What format function should we use?\n    // Is this an integer type?\n    // Can this type generate exponential notation?\n    var formatType = formatTypes[type],\n        maybeSuffix = !type || /[defgprs%]/.test(type);\n\n    // Set the default precision if not specified,\n    // or clamp the specified precision to the supported range.\n    // For significant precision, it must be in [1, 21].\n    // For fixed precision, it must be in [0, 20].\n    precision = precision == null ? (type ? 6 : 12)\n        : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))\n        : Math.max(0, Math.min(20, precision));\n\n    function format(value) {\n      var valuePrefix = prefix,\n          valueSuffix = suffix,\n          i, n, c;\n\n      if (type === \"c\") {\n        valueSuffix = formatType(value) + valueSuffix;\n        value = \"\";\n      } else {\n        value = +value;\n\n        // Perform the initial formatting.\n        var valueNegative = value < 0;\n        value = formatType(Math.abs(value), precision);\n\n        // If a negative value rounds to zero during formatting, treat as positive.\n        if (valueNegative && +value === 0) valueNegative = false;\n\n        // Compute the prefix and suffix.\n        valuePrefix = (valueNegative ? (sign === \"(\" ? sign : \"-\") : sign === \"-\" || sign === \"(\" ? \"\" : sign) + valuePrefix;\n        valueSuffix = valueSuffix + (type === \"s\" ? prefixes[8 + prefixExponent / 3] : \"\") + (valueNegative && sign === \"(\" ? \")\" : \"\");\n\n        // Break the formatted value into the integer “value” part that can be\n        // grouped, and fractional or exponential “suffix” part that is not.\n        if (maybeSuffix) {\n          i = -1, n = value.length;\n          while (++i < n) {\n            if (c = value.charCodeAt(i), 48 > c || c > 57) {\n              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;\n              value = value.slice(0, i);\n              break;\n            }\n          }\n        }\n      }\n\n      // If the fill character is not \"0\", grouping is applied before padding.\n      if (comma && !zero) value = group(value, Infinity);\n\n      // Compute the padding.\n      var length = valuePrefix.length + value.length + valueSuffix.length,\n          padding = length < width ? new Array(width - length + 1).join(fill) : \"\";\n\n      // If the fill character is \"0\", grouping is applied after padding.\n      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = \"\";\n\n      // Reconstruct the final output based on the desired alignment.\n      switch (align) {\n        case \"<\": value = valuePrefix + value + valueSuffix + padding; break;\n        case \"=\": value = valuePrefix + padding + value + valueSuffix; break;\n        case \"^\": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;\n        default: value = padding + valuePrefix + value + valueSuffix; break;\n      }\n\n      return numerals(value);\n    }\n\n    format.toString = function() {\n      return specifier + \"\";\n    };\n\n    return format;\n  }\n\n  function formatPrefix(specifier, value) {\n    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = \"f\", specifier)),\n        e = Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3,\n        k = Math.pow(10, -e),\n        prefix = prefixes[8 + e / 3];\n    return function(value) {\n      return f(k * value) + prefix;\n    };\n  }\n\n  return {\n    format: newFormat,\n    formatPrefix: formatPrefix\n  };\n};\n\nvar locale$1;\n\n\n\ndefaultLocale({\n  decimal: \".\",\n  thousands: \",\",\n  grouping: [3],\n  currency: [\"$\", \"\"]\n});\n\nfunction defaultLocale(definition) {\n  locale$1 = formatLocale(definition);\n  exports.format = locale$1.format;\n  exports.formatPrefix = locale$1.formatPrefix;\n  return locale$1;\n}\n\nvar precisionFixed = function(step) {\n  return Math.max(0, -exponent$1(Math.abs(step)));\n};\n\nvar precisionPrefix = function(step, value) {\n  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3 - exponent$1(Math.abs(step)));\n};\n\nvar precisionRound = function(step, max) {\n  step = Math.abs(step), max = Math.abs(max) - step;\n  return Math.max(0, exponent$1(max) - exponent$1(step)) + 1;\n};\n\n// Adds floating point numbers with twice the normal precision.\n// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and\n// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)\n// 305–363 (1997).\n// Code adapted from GeographicLib by Charles F. F. Karney,\n// http://geographiclib.sourceforge.net/\n\nvar adder = function() {\n  return new Adder;\n};\n\nfunction Adder() {\n  this.reset();\n}\n\nAdder.prototype = {\n  constructor: Adder,\n  reset: function() {\n    this.s = // rounded value\n    this.t = 0; // exact error\n  },\n  add: function(y) {\n    add$1(temp, y, this.t);\n    add$1(this, temp.s, this.s);\n    if (this.s) this.t += temp.t;\n    else this.s = temp.t;\n  },\n  valueOf: function() {\n    return this.s;\n  }\n};\n\nvar temp = new Adder;\n\nfunction add$1(adder, a, b) {\n  var x = adder.s = a + b,\n      bv = x - a,\n      av = x - bv;\n  adder.t = (a - av) + (b - bv);\n}\n\nvar epsilon$2 = 1e-6;\nvar epsilon2$1 = 1e-12;\nvar pi$3 = Math.PI;\nvar halfPi$2 = pi$3 / 2;\nvar quarterPi = pi$3 / 4;\nvar tau$3 = pi$3 * 2;\n\nvar degrees$1 = 180 / pi$3;\nvar radians = pi$3 / 180;\n\nvar abs = Math.abs;\nvar atan = Math.atan;\nvar atan2 = Math.atan2;\nvar cos$1 = Math.cos;\nvar ceil = Math.ceil;\nvar exp = Math.exp;\n\nvar log = Math.log;\nvar pow = Math.pow;\nvar sin$1 = Math.sin;\nvar sign = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };\nvar sqrt = Math.sqrt;\nvar tan = Math.tan;\n\nfunction acos(x) {\n  return x > 1 ? 0 : x < -1 ? pi$3 : Math.acos(x);\n}\n\nfunction asin(x) {\n  return x > 1 ? halfPi$2 : x < -1 ? -halfPi$2 : Math.asin(x);\n}\n\nfunction haversin(x) {\n  return (x = sin$1(x / 2)) * x;\n}\n\nfunction noop$1() {}\n\nfunction streamGeometry(geometry, stream) {\n  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {\n    streamGeometryType[geometry.type](geometry, stream);\n  }\n}\n\nvar streamObjectType = {\n  Feature: function(object, stream) {\n    streamGeometry(object.geometry, stream);\n  },\n  FeatureCollection: function(object, stream) {\n    var features = object.features, i = -1, n = features.length;\n    while (++i < n) streamGeometry(features[i].geometry, stream);\n  }\n};\n\nvar streamGeometryType = {\n  Sphere: function(object, stream) {\n    stream.sphere();\n  },\n  Point: function(object, stream) {\n    object = object.coordinates;\n    stream.point(object[0], object[1], object[2]);\n  },\n  MultiPoint: function(object, stream) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);\n  },\n  LineString: function(object, stream) {\n    streamLine(object.coordinates, stream, 0);\n  },\n  MultiLineString: function(object, stream) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) streamLine(coordinates[i], stream, 0);\n  },\n  Polygon: function(object, stream) {\n    streamPolygon(object.coordinates, stream);\n  },\n  MultiPolygon: function(object, stream) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) streamPolygon(coordinates[i], stream);\n  },\n  GeometryCollection: function(object, stream) {\n    var geometries = object.geometries, i = -1, n = geometries.length;\n    while (++i < n) streamGeometry(geometries[i], stream);\n  }\n};\n\nfunction streamLine(coordinates, stream, closed) {\n  var i = -1, n = coordinates.length - closed, coordinate;\n  stream.lineStart();\n  while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);\n  stream.lineEnd();\n}\n\nfunction streamPolygon(coordinates, stream) {\n  var i = -1, n = coordinates.length;\n  stream.polygonStart();\n  while (++i < n) streamLine(coordinates[i], stream, 1);\n  stream.polygonEnd();\n}\n\nvar geoStream = function(object, stream) {\n  if (object && streamObjectType.hasOwnProperty(object.type)) {\n    streamObjectType[object.type](object, stream);\n  } else {\n    streamGeometry(object, stream);\n  }\n};\n\nvar areaRingSum = adder();\n\nvar areaSum = adder();\nvar lambda00;\nvar phi00;\nvar lambda0;\nvar cosPhi0;\nvar sinPhi0;\n\nvar areaStream = {\n  point: noop$1,\n  lineStart: noop$1,\n  lineEnd: noop$1,\n  polygonStart: function() {\n    areaRingSum.reset();\n    areaStream.lineStart = areaRingStart;\n    areaStream.lineEnd = areaRingEnd;\n  },\n  polygonEnd: function() {\n    var areaRing = +areaRingSum;\n    areaSum.add(areaRing < 0 ? tau$3 + areaRing : areaRing);\n    this.lineStart = this.lineEnd = this.point = noop$1;\n  },\n  sphere: function() {\n    areaSum.add(tau$3);\n  }\n};\n\nfunction areaRingStart() {\n  areaStream.point = areaPointFirst;\n}\n\nfunction areaRingEnd() {\n  areaPoint(lambda00, phi00);\n}\n\nfunction areaPointFirst(lambda, phi) {\n  areaStream.point = areaPoint;\n  lambda00 = lambda, phi00 = phi;\n  lambda *= radians, phi *= radians;\n  lambda0 = lambda, cosPhi0 = cos$1(phi = phi / 2 + quarterPi), sinPhi0 = sin$1(phi);\n}\n\nfunction areaPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  phi = phi / 2 + quarterPi; // half the angular distance from south pole\n\n  // Spherical excess E for a spherical triangle with vertices: south pole,\n  // previous point, current point.  Uses a formula derived from Cagnoli’s\n  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).\n  var dLambda = lambda - lambda0,\n      sdLambda = dLambda >= 0 ? 1 : -1,\n      adLambda = sdLambda * dLambda,\n      cosPhi = cos$1(phi),\n      sinPhi = sin$1(phi),\n      k = sinPhi0 * sinPhi,\n      u = cosPhi0 * cosPhi + k * cos$1(adLambda),\n      v = k * sdLambda * sin$1(adLambda);\n  areaRingSum.add(atan2(v, u));\n\n  // Advance the previous points.\n  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;\n}\n\nvar area = function(object) {\n  areaSum.reset();\n  geoStream(object, areaStream);\n  return areaSum * 2;\n};\n\nfunction spherical(cartesian) {\n  return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];\n}\n\nfunction cartesian(spherical) {\n  var lambda = spherical[0], phi = spherical[1], cosPhi = cos$1(phi);\n  return [cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)];\n}\n\nfunction cartesianDot(a, b) {\n  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];\n}\n\nfunction cartesianCross(a, b) {\n  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];\n}\n\n// TODO return a\nfunction cartesianAddInPlace(a, b) {\n  a[0] += b[0], a[1] += b[1], a[2] += b[2];\n}\n\nfunction cartesianScale(vector, k) {\n  return [vector[0] * k, vector[1] * k, vector[2] * k];\n}\n\n// TODO return d\nfunction cartesianNormalizeInPlace(d) {\n  var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);\n  d[0] /= l, d[1] /= l, d[2] /= l;\n}\n\nvar lambda0$1;\nvar phi0;\nvar lambda1;\nvar phi1;\nvar lambda2;\nvar lambda00$1;\nvar phi00$1;\nvar p0;\nvar deltaSum = adder();\nvar ranges;\nvar range;\n\nvar boundsStream = {\n  point: boundsPoint,\n  lineStart: boundsLineStart,\n  lineEnd: boundsLineEnd,\n  polygonStart: function() {\n    boundsStream.point = boundsRingPoint;\n    boundsStream.lineStart = boundsRingStart;\n    boundsStream.lineEnd = boundsRingEnd;\n    deltaSum.reset();\n    areaStream.polygonStart();\n  },\n  polygonEnd: function() {\n    areaStream.polygonEnd();\n    boundsStream.point = boundsPoint;\n    boundsStream.lineStart = boundsLineStart;\n    boundsStream.lineEnd = boundsLineEnd;\n    if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);\n    else if (deltaSum > epsilon$2) phi1 = 90;\n    else if (deltaSum < -epsilon$2) phi0 = -90;\n    range[0] = lambda0$1, range[1] = lambda1;\n  }\n};\n\nfunction boundsPoint(lambda, phi) {\n  ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);\n  if (phi < phi0) phi0 = phi;\n  if (phi > phi1) phi1 = phi;\n}\n\nfunction linePoint(lambda, phi) {\n  var p = cartesian([lambda * radians, phi * radians]);\n  if (p0) {\n    var normal = cartesianCross(p0, p),\n        equatorial = [normal[1], -normal[0], 0],\n        inflection = cartesianCross(equatorial, normal);\n    cartesianNormalizeInPlace(inflection);\n    inflection = spherical(inflection);\n    var delta = lambda - lambda2,\n        sign$$1 = delta > 0 ? 1 : -1,\n        lambdai = inflection[0] * degrees$1 * sign$$1,\n        phii,\n        antimeridian = abs(delta) > 180;\n    if (antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {\n      phii = inflection[1] * degrees$1;\n      if (phii > phi1) phi1 = phii;\n    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {\n      phii = -inflection[1] * degrees$1;\n      if (phii < phi0) phi0 = phii;\n    } else {\n      if (phi < phi0) phi0 = phi;\n      if (phi > phi1) phi1 = phi;\n    }\n    if (antimeridian) {\n      if (lambda < lambda2) {\n        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;\n      } else {\n        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;\n      }\n    } else {\n      if (lambda1 >= lambda0$1) {\n        if (lambda < lambda0$1) lambda0$1 = lambda;\n        if (lambda > lambda1) lambda1 = lambda;\n      } else {\n        if (lambda > lambda2) {\n          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;\n        } else {\n          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;\n        }\n      }\n    }\n  } else {\n    ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);\n  }\n  if (phi < phi0) phi0 = phi;\n  if (phi > phi1) phi1 = phi;\n  p0 = p, lambda2 = lambda;\n}\n\nfunction boundsLineStart() {\n  boundsStream.point = linePoint;\n}\n\nfunction boundsLineEnd() {\n  range[0] = lambda0$1, range[1] = lambda1;\n  boundsStream.point = boundsPoint;\n  p0 = null;\n}\n\nfunction boundsRingPoint(lambda, phi) {\n  if (p0) {\n    var delta = lambda - lambda2;\n    deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);\n  } else {\n    lambda00$1 = lambda, phi00$1 = phi;\n  }\n  areaStream.point(lambda, phi);\n  linePoint(lambda, phi);\n}\n\nfunction boundsRingStart() {\n  areaStream.lineStart();\n}\n\nfunction boundsRingEnd() {\n  boundsRingPoint(lambda00$1, phi00$1);\n  areaStream.lineEnd();\n  if (abs(deltaSum) > epsilon$2) lambda0$1 = -(lambda1 = 180);\n  range[0] = lambda0$1, range[1] = lambda1;\n  p0 = null;\n}\n\n// Finds the left-right distance between two longitudes.\n// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want\n// the distance between ±180° to be 360°.\nfunction angle(lambda0, lambda1) {\n  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;\n}\n\nfunction rangeCompare(a, b) {\n  return a[0] - b[0];\n}\n\nfunction rangeContains(range, x) {\n  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;\n}\n\nvar bounds = function(feature) {\n  var i, n, a, b, merged, deltaMax, delta;\n\n  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);\n  ranges = [];\n  geoStream(feature, boundsStream);\n\n  // First, sort ranges by their minimum longitudes.\n  if (n = ranges.length) {\n    ranges.sort(rangeCompare);\n\n    // Then, merge any ranges that overlap.\n    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {\n      b = ranges[i];\n      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {\n        if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];\n        if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];\n      } else {\n        merged.push(a = b);\n      }\n    }\n\n    // Finally, find the largest gap between the merged ranges.\n    // The final bounding box will be the inverse of this gap.\n    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {\n      b = merged[i];\n      if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];\n    }\n  }\n\n  ranges = range = null;\n\n  return lambda0$1 === Infinity || phi0 === Infinity\n      ? [[NaN, NaN], [NaN, NaN]]\n      : [[lambda0$1, phi0], [lambda1, phi1]];\n};\n\nvar W0;\nvar W1;\nvar X0;\nvar Y0;\nvar Z0;\nvar X1;\nvar Y1;\nvar Z1;\nvar X2;\nvar Y2;\nvar Z2;\nvar lambda00$2;\nvar phi00$2;\nvar x0;\nvar y0;\nvar z0; // previous point\n\nvar centroidStream = {\n  sphere: noop$1,\n  point: centroidPoint,\n  lineStart: centroidLineStart,\n  lineEnd: centroidLineEnd,\n  polygonStart: function() {\n    centroidStream.lineStart = centroidRingStart;\n    centroidStream.lineEnd = centroidRingEnd;\n  },\n  polygonEnd: function() {\n    centroidStream.lineStart = centroidLineStart;\n    centroidStream.lineEnd = centroidLineEnd;\n  }\n};\n\n// Arithmetic mean of Cartesian vectors.\nfunction centroidPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi);\n  centroidPointCartesian(cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi));\n}\n\nfunction centroidPointCartesian(x, y, z) {\n  ++W0;\n  X0 += (x - X0) / W0;\n  Y0 += (y - Y0) / W0;\n  Z0 += (z - Z0) / W0;\n}\n\nfunction centroidLineStart() {\n  centroidStream.point = centroidLinePointFirst;\n}\n\nfunction centroidLinePointFirst(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi);\n  x0 = cosPhi * cos$1(lambda);\n  y0 = cosPhi * sin$1(lambda);\n  z0 = sin$1(phi);\n  centroidStream.point = centroidLinePoint;\n  centroidPointCartesian(x0, y0, z0);\n}\n\nfunction centroidLinePoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi),\n      x = cosPhi * cos$1(lambda),\n      y = cosPhi * sin$1(lambda),\n      z = sin$1(phi),\n      w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);\n  W1 += w;\n  X1 += w * (x0 + (x0 = x));\n  Y1 += w * (y0 + (y0 = y));\n  Z1 += w * (z0 + (z0 = z));\n  centroidPointCartesian(x0, y0, z0);\n}\n\nfunction centroidLineEnd() {\n  centroidStream.point = centroidPoint;\n}\n\n// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,\n// J. Applied Mechanics 42, 239 (1975).\nfunction centroidRingStart() {\n  centroidStream.point = centroidRingPointFirst;\n}\n\nfunction centroidRingEnd() {\n  centroidRingPoint(lambda00$2, phi00$2);\n  centroidStream.point = centroidPoint;\n}\n\nfunction centroidRingPointFirst(lambda, phi) {\n  lambda00$2 = lambda, phi00$2 = phi;\n  lambda *= radians, phi *= radians;\n  centroidStream.point = centroidRingPoint;\n  var cosPhi = cos$1(phi);\n  x0 = cosPhi * cos$1(lambda);\n  y0 = cosPhi * sin$1(lambda);\n  z0 = sin$1(phi);\n  centroidPointCartesian(x0, y0, z0);\n}\n\nfunction centroidRingPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var cosPhi = cos$1(phi),\n      x = cosPhi * cos$1(lambda),\n      y = cosPhi * sin$1(lambda),\n      z = sin$1(phi),\n      cx = y0 * z - z0 * y,\n      cy = z0 * x - x0 * z,\n      cz = x0 * y - y0 * x,\n      m = sqrt(cx * cx + cy * cy + cz * cz),\n      w = asin(m), // line weight = angle\n      v = m && -w / m; // area weight multiplier\n  X2 += v * cx;\n  Y2 += v * cy;\n  Z2 += v * cz;\n  W1 += w;\n  X1 += w * (x0 + (x0 = x));\n  Y1 += w * (y0 + (y0 = y));\n  Z1 += w * (z0 + (z0 = z));\n  centroidPointCartesian(x0, y0, z0);\n}\n\nvar centroid = function(object) {\n  W0 = W1 =\n  X0 = Y0 = Z0 =\n  X1 = Y1 = Z1 =\n  X2 = Y2 = Z2 = 0;\n  geoStream(object, centroidStream);\n\n  var x = X2,\n      y = Y2,\n      z = Z2,\n      m = x * x + y * y + z * z;\n\n  // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.\n  if (m < epsilon2$1) {\n    x = X1, y = Y1, z = Z1;\n    // If the feature has zero length, fall back to arithmetic mean of point vectors.\n    if (W1 < epsilon$2) x = X0, y = Y0, z = Z0;\n    m = x * x + y * y + z * z;\n    // If the feature still has an undefined ccentroid, then return.\n    if (m < epsilon2$1) return [NaN, NaN];\n  }\n\n  return [atan2(y, x) * degrees$1, asin(z / sqrt(m)) * degrees$1];\n};\n\nvar constant$7 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar compose = function(a, b) {\n\n  function compose(x, y) {\n    return x = a(x, y), b(x[0], x[1]);\n  }\n\n  if (a.invert && b.invert) compose.invert = function(x, y) {\n    return x = b.invert(x, y), x && a.invert(x[0], x[1]);\n  };\n\n  return compose;\n};\n\nfunction rotationIdentity(lambda, phi) {\n  return [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];\n}\n\nrotationIdentity.invert = rotationIdentity;\n\nfunction rotateRadians(deltaLambda, deltaPhi, deltaGamma) {\n  return (deltaLambda %= tau$3) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))\n    : rotationLambda(deltaLambda))\n    : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)\n    : rotationIdentity);\n}\n\nfunction forwardRotationLambda(deltaLambda) {\n  return function(lambda, phi) {\n    return lambda += deltaLambda, [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];\n  };\n}\n\nfunction rotationLambda(deltaLambda) {\n  var rotation = forwardRotationLambda(deltaLambda);\n  rotation.invert = forwardRotationLambda(-deltaLambda);\n  return rotation;\n}\n\nfunction rotationPhiGamma(deltaPhi, deltaGamma) {\n  var cosDeltaPhi = cos$1(deltaPhi),\n      sinDeltaPhi = sin$1(deltaPhi),\n      cosDeltaGamma = cos$1(deltaGamma),\n      sinDeltaGamma = sin$1(deltaGamma);\n\n  function rotation(lambda, phi) {\n    var cosPhi = cos$1(phi),\n        x = cos$1(lambda) * cosPhi,\n        y = sin$1(lambda) * cosPhi,\n        z = sin$1(phi),\n        k = z * cosDeltaPhi + x * sinDeltaPhi;\n    return [\n      atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),\n      asin(k * cosDeltaGamma + y * sinDeltaGamma)\n    ];\n  }\n\n  rotation.invert = function(lambda, phi) {\n    var cosPhi = cos$1(phi),\n        x = cos$1(lambda) * cosPhi,\n        y = sin$1(lambda) * cosPhi,\n        z = sin$1(phi),\n        k = z * cosDeltaGamma - y * sinDeltaGamma;\n    return [\n      atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),\n      asin(k * cosDeltaPhi - x * sinDeltaPhi)\n    ];\n  };\n\n  return rotation;\n}\n\nvar rotation = function(rotate) {\n  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);\n\n  function forward(coordinates) {\n    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);\n    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;\n  }\n\n  forward.invert = function(coordinates) {\n    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);\n    return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;\n  };\n\n  return forward;\n};\n\n// Generates a circle centered at [0°, 0°], with a given radius and precision.\nfunction circleStream(stream, radius, delta, direction, t0, t1) {\n  if (!delta) return;\n  var cosRadius = cos$1(radius),\n      sinRadius = sin$1(radius),\n      step = direction * delta;\n  if (t0 == null) {\n    t0 = radius + direction * tau$3;\n    t1 = radius - step / 2;\n  } else {\n    t0 = circleRadius(cosRadius, t0);\n    t1 = circleRadius(cosRadius, t1);\n    if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau$3;\n  }\n  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {\n    point = spherical([cosRadius, -sinRadius * cos$1(t), -sinRadius * sin$1(t)]);\n    stream.point(point[0], point[1]);\n  }\n}\n\n// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].\nfunction circleRadius(cosRadius, point) {\n  point = cartesian(point), point[0] -= cosRadius;\n  cartesianNormalizeInPlace(point);\n  var radius = acos(-point[1]);\n  return ((-point[2] < 0 ? -radius : radius) + tau$3 - epsilon$2) % tau$3;\n}\n\nvar circle = function() {\n  var center = constant$7([0, 0]),\n      radius = constant$7(90),\n      precision = constant$7(6),\n      ring,\n      rotate,\n      stream = {point: point};\n\n  function point(x, y) {\n    ring.push(x = rotate(x, y));\n    x[0] *= degrees$1, x[1] *= degrees$1;\n  }\n\n  function circle() {\n    var c = center.apply(this, arguments),\n        r = radius.apply(this, arguments) * radians,\n        p = precision.apply(this, arguments) * radians;\n    ring = [];\n    rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;\n    circleStream(stream, r, p, 1);\n    c = {type: \"Polygon\", coordinates: [ring]};\n    ring = rotate = null;\n    return c;\n  }\n\n  circle.center = function(_) {\n    return arguments.length ? (center = typeof _ === \"function\" ? _ : constant$7([+_[0], +_[1]]), circle) : center;\n  };\n\n  circle.radius = function(_) {\n    return arguments.length ? (radius = typeof _ === \"function\" ? _ : constant$7(+_), circle) : radius;\n  };\n\n  circle.precision = function(_) {\n    return arguments.length ? (precision = typeof _ === \"function\" ? _ : constant$7(+_), circle) : precision;\n  };\n\n  return circle;\n};\n\nvar clipBuffer = function() {\n  var lines = [],\n      line;\n  return {\n    point: function(x, y) {\n      line.push([x, y]);\n    },\n    lineStart: function() {\n      lines.push(line = []);\n    },\n    lineEnd: noop$1,\n    rejoin: function() {\n      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));\n    },\n    result: function() {\n      var result = lines;\n      lines = [];\n      line = null;\n      return result;\n    }\n  };\n};\n\nvar clipLine = function(a, b, x0, y0, x1, y1) {\n  var ax = a[0],\n      ay = a[1],\n      bx = b[0],\n      by = b[1],\n      t0 = 0,\n      t1 = 1,\n      dx = bx - ax,\n      dy = by - ay,\n      r;\n\n  r = x0 - ax;\n  if (!dx && r > 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dx > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = x1 - ax;\n  if (!dx && r < 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dx > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  r = y0 - ay;\n  if (!dy && r > 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dy > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = y1 - ay;\n  if (!dy && r < 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dy > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;\n  if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;\n  return true;\n};\n\nvar pointEqual = function(a, b) {\n  return abs(a[0] - b[0]) < epsilon$2 && abs(a[1] - b[1]) < epsilon$2;\n};\n\nfunction Intersection(point, points, other, entry) {\n  this.x = point;\n  this.z = points;\n  this.o = other; // another intersection\n  this.e = entry; // is an entry?\n  this.v = false; // visited\n  this.n = this.p = null; // next & previous\n}\n\n// A generalized polygon clipping algorithm: given a polygon that has been cut\n// into its visible line segments, and rejoins the segments by interpolating\n// along the clip edge.\nvar clipPolygon = function(segments, compareIntersection, startInside, interpolate, stream) {\n  var subject = [],\n      clip = [],\n      i,\n      n;\n\n  segments.forEach(function(segment) {\n    if ((n = segment.length - 1) <= 0) return;\n    var n, p0 = segment[0], p1 = segment[n], x;\n\n    // If the first and last points of a segment are coincident, then treat as a\n    // closed ring. TODO if all rings are closed, then the winding order of the\n    // exterior ring should be checked.\n    if (pointEqual(p0, p1)) {\n      stream.lineStart();\n      for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);\n      stream.lineEnd();\n      return;\n    }\n\n    subject.push(x = new Intersection(p0, segment, null, true));\n    clip.push(x.o = new Intersection(p0, null, x, false));\n    subject.push(x = new Intersection(p1, segment, null, false));\n    clip.push(x.o = new Intersection(p1, null, x, true));\n  });\n\n  if (!subject.length) return;\n\n  clip.sort(compareIntersection);\n  link$1(subject);\n  link$1(clip);\n\n  for (i = 0, n = clip.length; i < n; ++i) {\n    clip[i].e = startInside = !startInside;\n  }\n\n  var start = subject[0],\n      points,\n      point;\n\n  while (1) {\n    // Find first unvisited intersection.\n    var current = start,\n        isSubject = true;\n    while (current.v) if ((current = current.n) === start) return;\n    points = current.z;\n    stream.lineStart();\n    do {\n      current.v = current.o.v = true;\n      if (current.e) {\n        if (isSubject) {\n          for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);\n        } else {\n          interpolate(current.x, current.n.x, 1, stream);\n        }\n        current = current.n;\n      } else {\n        if (isSubject) {\n          points = current.p.z;\n          for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);\n        } else {\n          interpolate(current.x, current.p.x, -1, stream);\n        }\n        current = current.p;\n      }\n      current = current.o;\n      points = current.z;\n      isSubject = !isSubject;\n    } while (!current.v);\n    stream.lineEnd();\n  }\n};\n\nfunction link$1(array) {\n  if (!(n = array.length)) return;\n  var n,\n      i = 0,\n      a = array[0],\n      b;\n  while (++i < n) {\n    a.n = b = array[i];\n    b.p = a;\n    a = b;\n  }\n  a.n = b = array[0];\n  b.p = a;\n}\n\nvar clipMax = 1e9;\nvar clipMin = -clipMax;\n\n// TODO Use d3-polygon’s polygonContains here for the ring check?\n// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?\n\nfunction clipExtent(x0, y0, x1, y1) {\n\n  function visible(x, y) {\n    return x0 <= x && x <= x1 && y0 <= y && y <= y1;\n  }\n\n  function interpolate(from, to, direction, stream) {\n    var a = 0, a1 = 0;\n    if (from == null\n        || (a = corner(from, direction)) !== (a1 = corner(to, direction))\n        || comparePoint(from, to) < 0 ^ direction > 0) {\n      do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);\n      while ((a = (a + direction + 4) % 4) !== a1);\n    } else {\n      stream.point(to[0], to[1]);\n    }\n  }\n\n  function corner(p, direction) {\n    return abs(p[0] - x0) < epsilon$2 ? direction > 0 ? 0 : 3\n        : abs(p[0] - x1) < epsilon$2 ? direction > 0 ? 2 : 1\n        : abs(p[1] - y0) < epsilon$2 ? direction > 0 ? 1 : 0\n        : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon\n  }\n\n  function compareIntersection(a, b) {\n    return comparePoint(a.x, b.x);\n  }\n\n  function comparePoint(a, b) {\n    var ca = corner(a, 1),\n        cb = corner(b, 1);\n    return ca !== cb ? ca - cb\n        : ca === 0 ? b[1] - a[1]\n        : ca === 1 ? a[0] - b[0]\n        : ca === 2 ? a[1] - b[1]\n        : b[0] - a[0];\n  }\n\n  return function(stream) {\n    var activeStream = stream,\n        bufferStream = clipBuffer(),\n        segments,\n        polygon,\n        ring,\n        x__, y__, v__, // first point\n        x_, y_, v_, // previous point\n        first,\n        clean;\n\n    var clipStream = {\n      point: point,\n      lineStart: lineStart,\n      lineEnd: lineEnd,\n      polygonStart: polygonStart,\n      polygonEnd: polygonEnd\n    };\n\n    function point(x, y) {\n      if (visible(x, y)) activeStream.point(x, y);\n    }\n\n    function polygonInside() {\n      var winding = 0;\n\n      for (var i = 0, n = polygon.length; i < n; ++i) {\n        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {\n          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];\n          if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; }\n          else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; }\n        }\n      }\n\n      return winding;\n    }\n\n    // Buffer geometry within a polygon and then clip it en masse.\n    function polygonStart() {\n      activeStream = bufferStream, segments = [], polygon = [], clean = true;\n    }\n\n    function polygonEnd() {\n      var startInside = polygonInside(),\n          cleanInside = clean && startInside,\n          visible = (segments = merge(segments)).length;\n      if (cleanInside || visible) {\n        stream.polygonStart();\n        if (cleanInside) {\n          stream.lineStart();\n          interpolate(null, null, 1, stream);\n          stream.lineEnd();\n        }\n        if (visible) {\n          clipPolygon(segments, compareIntersection, startInside, interpolate, stream);\n        }\n        stream.polygonEnd();\n      }\n      activeStream = stream, segments = polygon = ring = null;\n    }\n\n    function lineStart() {\n      clipStream.point = linePoint;\n      if (polygon) polygon.push(ring = []);\n      first = true;\n      v_ = false;\n      x_ = y_ = NaN;\n    }\n\n    // TODO rather than special-case polygons, simply handle them separately.\n    // Ideally, coincident intersection points should be jittered to avoid\n    // clipping issues.\n    function lineEnd() {\n      if (segments) {\n        linePoint(x__, y__);\n        if (v__ && v_) bufferStream.rejoin();\n        segments.push(bufferStream.result());\n      }\n      clipStream.point = point;\n      if (v_) activeStream.lineEnd();\n    }\n\n    function linePoint(x, y) {\n      var v = visible(x, y);\n      if (polygon) ring.push([x, y]);\n      if (first) {\n        x__ = x, y__ = y, v__ = v;\n        first = false;\n        if (v) {\n          activeStream.lineStart();\n          activeStream.point(x, y);\n        }\n      } else {\n        if (v && v_) activeStream.point(x, y);\n        else {\n          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],\n              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];\n          if (clipLine(a, b, x0, y0, x1, y1)) {\n            if (!v_) {\n              activeStream.lineStart();\n              activeStream.point(a[0], a[1]);\n            }\n            activeStream.point(b[0], b[1]);\n            if (!v) activeStream.lineEnd();\n            clean = false;\n          } else if (v) {\n            activeStream.lineStart();\n            activeStream.point(x, y);\n            clean = false;\n          }\n        }\n      }\n      x_ = x, y_ = y, v_ = v;\n    }\n\n    return clipStream;\n  };\n}\n\nvar extent$1 = function() {\n  var x0 = 0,\n      y0 = 0,\n      x1 = 960,\n      y1 = 500,\n      cache,\n      cacheStream,\n      clip;\n\n  return clip = {\n    stream: function(stream) {\n      return cache && cacheStream === stream ? cache : cache = clipExtent(x0, y0, x1, y1)(cacheStream = stream);\n    },\n    extent: function(_) {\n      return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]];\n    }\n  };\n};\n\nvar sum$1 = adder();\n\nvar polygonContains = function(polygon, point) {\n  var lambda = point[0],\n      phi = point[1],\n      normal = [sin$1(lambda), -cos$1(lambda), 0],\n      angle = 0,\n      winding = 0;\n\n  sum$1.reset();\n\n  for (var i = 0, n = polygon.length; i < n; ++i) {\n    if (!(m = (ring = polygon[i]).length)) continue;\n    var ring,\n        m,\n        point0 = ring[m - 1],\n        lambda0 = point0[0],\n        phi0 = point0[1] / 2 + quarterPi,\n        sinPhi0 = sin$1(phi0),\n        cosPhi0 = cos$1(phi0);\n\n    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {\n      var point1 = ring[j],\n          lambda1 = point1[0],\n          phi1 = point1[1] / 2 + quarterPi,\n          sinPhi1 = sin$1(phi1),\n          cosPhi1 = cos$1(phi1),\n          delta = lambda1 - lambda0,\n          sign$$1 = delta >= 0 ? 1 : -1,\n          absDelta = sign$$1 * delta,\n          antimeridian = absDelta > pi$3,\n          k = sinPhi0 * sinPhi1;\n\n      sum$1.add(atan2(k * sign$$1 * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));\n      angle += antimeridian ? delta + sign$$1 * tau$3 : delta;\n\n      // Are the longitudes either side of the point’s meridian (lambda),\n      // and are the latitudes smaller than the parallel (phi)?\n      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {\n        var arc = cartesianCross(cartesian(point0), cartesian(point1));\n        cartesianNormalizeInPlace(arc);\n        var intersection = cartesianCross(normal, arc);\n        cartesianNormalizeInPlace(intersection);\n        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);\n        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {\n          winding += antimeridian ^ delta >= 0 ? 1 : -1;\n        }\n      }\n    }\n  }\n\n  // First, determine whether the South pole is inside or outside:\n  //\n  // It is inside if:\n  // * the polygon winds around it in a clockwise direction.\n  // * the polygon does not (cumulatively) wind around it, but has a negative\n  //   (counter-clockwise) area.\n  //\n  // Second, count the (signed) number of times a segment crosses a lambda\n  // from the point to the South pole.  If it is zero, then the point is the\n  // same side as the South pole.\n\n  return (angle < -epsilon$2 || angle < epsilon$2 && sum$1 < -epsilon$2) ^ (winding & 1);\n};\n\nvar lengthSum = adder();\nvar lambda0$2;\nvar sinPhi0$1;\nvar cosPhi0$1;\n\nvar lengthStream = {\n  sphere: noop$1,\n  point: noop$1,\n  lineStart: lengthLineStart,\n  lineEnd: noop$1,\n  polygonStart: noop$1,\n  polygonEnd: noop$1\n};\n\nfunction lengthLineStart() {\n  lengthStream.point = lengthPointFirst;\n  lengthStream.lineEnd = lengthLineEnd;\n}\n\nfunction lengthLineEnd() {\n  lengthStream.point = lengthStream.lineEnd = noop$1;\n}\n\nfunction lengthPointFirst(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  lambda0$2 = lambda, sinPhi0$1 = sin$1(phi), cosPhi0$1 = cos$1(phi);\n  lengthStream.point = lengthPoint;\n}\n\nfunction lengthPoint(lambda, phi) {\n  lambda *= radians, phi *= radians;\n  var sinPhi = sin$1(phi),\n      cosPhi = cos$1(phi),\n      delta = abs(lambda - lambda0$2),\n      cosDelta = cos$1(delta),\n      sinDelta = sin$1(delta),\n      x = cosPhi * sinDelta,\n      y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,\n      z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;\n  lengthSum.add(atan2(sqrt(x * x + y * y), z));\n  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;\n}\n\nvar length$1 = function(object) {\n  lengthSum.reset();\n  geoStream(object, lengthStream);\n  return +lengthSum;\n};\n\nvar coordinates = [null, null];\nvar object$1 = {type: \"LineString\", coordinates: coordinates};\n\nvar distance = function(a, b) {\n  coordinates[0] = a;\n  coordinates[1] = b;\n  return length$1(object$1);\n};\n\nvar containsObjectType = {\n  Feature: function(object, point) {\n    return containsGeometry(object.geometry, point);\n  },\n  FeatureCollection: function(object, point) {\n    var features = object.features, i = -1, n = features.length;\n    while (++i < n) if (containsGeometry(features[i].geometry, point)) return true;\n    return false;\n  }\n};\n\nvar containsGeometryType = {\n  Sphere: function() {\n    return true;\n  },\n  Point: function(object, point) {\n    return containsPoint(object.coordinates, point);\n  },\n  MultiPoint: function(object, point) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) if (containsPoint(coordinates[i], point)) return true;\n    return false;\n  },\n  LineString: function(object, point) {\n    return containsLine(object.coordinates, point);\n  },\n  MultiLineString: function(object, point) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) if (containsLine(coordinates[i], point)) return true;\n    return false;\n  },\n  Polygon: function(object, point) {\n    return containsPolygon(object.coordinates, point);\n  },\n  MultiPolygon: function(object, point) {\n    var coordinates = object.coordinates, i = -1, n = coordinates.length;\n    while (++i < n) if (containsPolygon(coordinates[i], point)) return true;\n    return false;\n  },\n  GeometryCollection: function(object, point) {\n    var geometries = object.geometries, i = -1, n = geometries.length;\n    while (++i < n) if (containsGeometry(geometries[i], point)) return true;\n    return false;\n  }\n};\n\nfunction containsGeometry(geometry, point) {\n  return geometry && containsGeometryType.hasOwnProperty(geometry.type)\n      ? containsGeometryType[geometry.type](geometry, point)\n      : false;\n}\n\nfunction containsPoint(coordinates, point) {\n  return distance(coordinates, point) === 0;\n}\n\nfunction containsLine(coordinates, point) {\n  var ab = distance(coordinates[0], coordinates[1]),\n      ao = distance(coordinates[0], point),\n      ob = distance(point, coordinates[1]);\n  return ao + ob <= ab + epsilon$2;\n}\n\nfunction containsPolygon(coordinates, point) {\n  return !!polygonContains(coordinates.map(ringRadians), pointRadians(point));\n}\n\nfunction ringRadians(ring) {\n  return ring = ring.map(pointRadians), ring.pop(), ring;\n}\n\nfunction pointRadians(point) {\n  return [point[0] * radians, point[1] * radians];\n}\n\nvar contains = function(object, point) {\n  return (object && containsObjectType.hasOwnProperty(object.type)\n      ? containsObjectType[object.type]\n      : containsGeometry)(object, point);\n};\n\nfunction graticuleX(y0, y1, dy) {\n  var y = sequence(y0, y1 - epsilon$2, dy).concat(y1);\n  return function(x) { return y.map(function(y) { return [x, y]; }); };\n}\n\nfunction graticuleY(x0, x1, dx) {\n  var x = sequence(x0, x1 - epsilon$2, dx).concat(x1);\n  return function(y) { return x.map(function(x) { return [x, y]; }); };\n}\n\nfunction graticule() {\n  var x1, x0, X1, X0,\n      y1, y0, Y1, Y0,\n      dx = 10, dy = dx, DX = 90, DY = 360,\n      x, y, X, Y,\n      precision = 2.5;\n\n  function graticule() {\n    return {type: \"MultiLineString\", coordinates: lines()};\n  }\n\n  function lines() {\n    return sequence(ceil(X0 / DX) * DX, X1, DX).map(X)\n        .concat(sequence(ceil(Y0 / DY) * DY, Y1, DY).map(Y))\n        .concat(sequence(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs(x % DX) > epsilon$2; }).map(x))\n        .concat(sequence(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs(y % DY) > epsilon$2; }).map(y));\n  }\n\n  graticule.lines = function() {\n    return lines().map(function(coordinates) { return {type: \"LineString\", coordinates: coordinates}; });\n  };\n\n  graticule.outline = function() {\n    return {\n      type: \"Polygon\",\n      coordinates: [\n        X(X0).concat(\n        Y(Y1).slice(1),\n        X(X1).reverse().slice(1),\n        Y(Y0).reverse().slice(1))\n      ]\n    };\n  };\n\n  graticule.extent = function(_) {\n    if (!arguments.length) return graticule.extentMinor();\n    return graticule.extentMajor(_).extentMinor(_);\n  };\n\n  graticule.extentMajor = function(_) {\n    if (!arguments.length) return [[X0, Y0], [X1, Y1]];\n    X0 = +_[0][0], X1 = +_[1][0];\n    Y0 = +_[0][1], Y1 = +_[1][1];\n    if (X0 > X1) _ = X0, X0 = X1, X1 = _;\n    if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;\n    return graticule.precision(precision);\n  };\n\n  graticule.extentMinor = function(_) {\n    if (!arguments.length) return [[x0, y0], [x1, y1]];\n    x0 = +_[0][0], x1 = +_[1][0];\n    y0 = +_[0][1], y1 = +_[1][1];\n    if (x0 > x1) _ = x0, x0 = x1, x1 = _;\n    if (y0 > y1) _ = y0, y0 = y1, y1 = _;\n    return graticule.precision(precision);\n  };\n\n  graticule.step = function(_) {\n    if (!arguments.length) return graticule.stepMinor();\n    return graticule.stepMajor(_).stepMinor(_);\n  };\n\n  graticule.stepMajor = function(_) {\n    if (!arguments.length) return [DX, DY];\n    DX = +_[0], DY = +_[1];\n    return graticule;\n  };\n\n  graticule.stepMinor = function(_) {\n    if (!arguments.length) return [dx, dy];\n    dx = +_[0], dy = +_[1];\n    return graticule;\n  };\n\n  graticule.precision = function(_) {\n    if (!arguments.length) return precision;\n    precision = +_;\n    x = graticuleX(y0, y1, 90);\n    y = graticuleY(x0, x1, precision);\n    X = graticuleX(Y0, Y1, 90);\n    Y = graticuleY(X0, X1, precision);\n    return graticule;\n  };\n\n  return graticule\n      .extentMajor([[-180, -90 + epsilon$2], [180, 90 - epsilon$2]])\n      .extentMinor([[-180, -80 - epsilon$2], [180, 80 + epsilon$2]]);\n}\n\nfunction graticule10() {\n  return graticule()();\n}\n\nvar interpolate$1 = function(a, b) {\n  var x0 = a[0] * radians,\n      y0 = a[1] * radians,\n      x1 = b[0] * radians,\n      y1 = b[1] * radians,\n      cy0 = cos$1(y0),\n      sy0 = sin$1(y0),\n      cy1 = cos$1(y1),\n      sy1 = sin$1(y1),\n      kx0 = cy0 * cos$1(x0),\n      ky0 = cy0 * sin$1(x0),\n      kx1 = cy1 * cos$1(x1),\n      ky1 = cy1 * sin$1(x1),\n      d = 2 * asin(sqrt(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))),\n      k = sin$1(d);\n\n  var interpolate = d ? function(t) {\n    var B = sin$1(t *= d) / k,\n        A = sin$1(d - t) / k,\n        x = A * kx0 + B * kx1,\n        y = A * ky0 + B * ky1,\n        z = A * sy0 + B * sy1;\n    return [\n      atan2(y, x) * degrees$1,\n      atan2(z, sqrt(x * x + y * y)) * degrees$1\n    ];\n  } : function() {\n    return [x0 * degrees$1, y0 * degrees$1];\n  };\n\n  interpolate.distance = d;\n\n  return interpolate;\n};\n\nvar identity$4 = function(x) {\n  return x;\n};\n\nvar areaSum$1 = adder();\nvar areaRingSum$1 = adder();\nvar x00;\nvar y00;\nvar x0$1;\nvar y0$1;\n\nvar areaStream$1 = {\n  point: noop$1,\n  lineStart: noop$1,\n  lineEnd: noop$1,\n  polygonStart: function() {\n    areaStream$1.lineStart = areaRingStart$1;\n    areaStream$1.lineEnd = areaRingEnd$1;\n  },\n  polygonEnd: function() {\n    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$1;\n    areaSum$1.add(abs(areaRingSum$1));\n    areaRingSum$1.reset();\n  },\n  result: function() {\n    var area = areaSum$1 / 2;\n    areaSum$1.reset();\n    return area;\n  }\n};\n\nfunction areaRingStart$1() {\n  areaStream$1.point = areaPointFirst$1;\n}\n\nfunction areaPointFirst$1(x, y) {\n  areaStream$1.point = areaPoint$1;\n  x00 = x0$1 = x, y00 = y0$1 = y;\n}\n\nfunction areaPoint$1(x, y) {\n  areaRingSum$1.add(y0$1 * x - x0$1 * y);\n  x0$1 = x, y0$1 = y;\n}\n\nfunction areaRingEnd$1() {\n  areaPoint$1(x00, y00);\n}\n\nvar x0$2 = Infinity;\nvar y0$2 = x0$2;\nvar x1 = -x0$2;\nvar y1 = x1;\n\nvar boundsStream$1 = {\n  point: boundsPoint$1,\n  lineStart: noop$1,\n  lineEnd: noop$1,\n  polygonStart: noop$1,\n  polygonEnd: noop$1,\n  result: function() {\n    var bounds = [[x0$2, y0$2], [x1, y1]];\n    x1 = y1 = -(y0$2 = x0$2 = Infinity);\n    return bounds;\n  }\n};\n\nfunction boundsPoint$1(x, y) {\n  if (x < x0$2) x0$2 = x;\n  if (x > x1) x1 = x;\n  if (y < y0$2) y0$2 = y;\n  if (y > y1) y1 = y;\n}\n\n// TODO Enforce positive area for exterior, negative area for interior?\n\nvar X0$1 = 0;\nvar Y0$1 = 0;\nvar Z0$1 = 0;\nvar X1$1 = 0;\nvar Y1$1 = 0;\nvar Z1$1 = 0;\nvar X2$1 = 0;\nvar Y2$1 = 0;\nvar Z2$1 = 0;\nvar x00$1;\nvar y00$1;\nvar x0$3;\nvar y0$3;\n\nvar centroidStream$1 = {\n  point: centroidPoint$1,\n  lineStart: centroidLineStart$1,\n  lineEnd: centroidLineEnd$1,\n  polygonStart: function() {\n    centroidStream$1.lineStart = centroidRingStart$1;\n    centroidStream$1.lineEnd = centroidRingEnd$1;\n  },\n  polygonEnd: function() {\n    centroidStream$1.point = centroidPoint$1;\n    centroidStream$1.lineStart = centroidLineStart$1;\n    centroidStream$1.lineEnd = centroidLineEnd$1;\n  },\n  result: function() {\n    var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]\n        : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]\n        : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]\n        : [NaN, NaN];\n    X0$1 = Y0$1 = Z0$1 =\n    X1$1 = Y1$1 = Z1$1 =\n    X2$1 = Y2$1 = Z2$1 = 0;\n    return centroid;\n  }\n};\n\nfunction centroidPoint$1(x, y) {\n  X0$1 += x;\n  Y0$1 += y;\n  ++Z0$1;\n}\n\nfunction centroidLineStart$1() {\n  centroidStream$1.point = centroidPointFirstLine;\n}\n\nfunction centroidPointFirstLine(x, y) {\n  centroidStream$1.point = centroidPointLine;\n  centroidPoint$1(x0$3 = x, y0$3 = y);\n}\n\nfunction centroidPointLine(x, y) {\n  var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy);\n  X1$1 += z * (x0$3 + x) / 2;\n  Y1$1 += z * (y0$3 + y) / 2;\n  Z1$1 += z;\n  centroidPoint$1(x0$3 = x, y0$3 = y);\n}\n\nfunction centroidLineEnd$1() {\n  centroidStream$1.point = centroidPoint$1;\n}\n\nfunction centroidRingStart$1() {\n  centroidStream$1.point = centroidPointFirstRing;\n}\n\nfunction centroidRingEnd$1() {\n  centroidPointRing(x00$1, y00$1);\n}\n\nfunction centroidPointFirstRing(x, y) {\n  centroidStream$1.point = centroidPointRing;\n  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);\n}\n\nfunction centroidPointRing(x, y) {\n  var dx = x - x0$3,\n      dy = y - y0$3,\n      z = sqrt(dx * dx + dy * dy);\n\n  X1$1 += z * (x0$3 + x) / 2;\n  Y1$1 += z * (y0$3 + y) / 2;\n  Z1$1 += z;\n\n  z = y0$3 * x - x0$3 * y;\n  X2$1 += z * (x0$3 + x);\n  Y2$1 += z * (y0$3 + y);\n  Z2$1 += z * 3;\n  centroidPoint$1(x0$3 = x, y0$3 = y);\n}\n\nfunction PathContext(context) {\n  this._context = context;\n}\n\nPathContext.prototype = {\n  _radius: 4.5,\n  pointRadius: function(_) {\n    return this._radius = _, this;\n  },\n  polygonStart: function() {\n    this._line = 0;\n  },\n  polygonEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line === 0) this._context.closePath();\n    this._point = NaN;\n  },\n  point: function(x, y) {\n    switch (this._point) {\n      case 0: {\n        this._context.moveTo(x, y);\n        this._point = 1;\n        break;\n      }\n      case 1: {\n        this._context.lineTo(x, y);\n        break;\n      }\n      default: {\n        this._context.moveTo(x + this._radius, y);\n        this._context.arc(x, y, this._radius, 0, tau$3);\n        break;\n      }\n    }\n  },\n  result: noop$1\n};\n\nvar lengthSum$1 = adder();\nvar lengthRing;\nvar x00$2;\nvar y00$2;\nvar x0$4;\nvar y0$4;\n\nvar lengthStream$1 = {\n  point: noop$1,\n  lineStart: function() {\n    lengthStream$1.point = lengthPointFirst$1;\n  },\n  lineEnd: function() {\n    if (lengthRing) lengthPoint$1(x00$2, y00$2);\n    lengthStream$1.point = noop$1;\n  },\n  polygonStart: function() {\n    lengthRing = true;\n  },\n  polygonEnd: function() {\n    lengthRing = null;\n  },\n  result: function() {\n    var length = +lengthSum$1;\n    lengthSum$1.reset();\n    return length;\n  }\n};\n\nfunction lengthPointFirst$1(x, y) {\n  lengthStream$1.point = lengthPoint$1;\n  x00$2 = x0$4 = x, y00$2 = y0$4 = y;\n}\n\nfunction lengthPoint$1(x, y) {\n  x0$4 -= x, y0$4 -= y;\n  lengthSum$1.add(sqrt(x0$4 * x0$4 + y0$4 * y0$4));\n  x0$4 = x, y0$4 = y;\n}\n\nfunction PathString() {\n  this._string = [];\n}\n\nPathString.prototype = {\n  _circle: circle$1(4.5),\n  pointRadius: function(_) {\n    return this._circle = circle$1(_), this;\n  },\n  polygonStart: function() {\n    this._line = 0;\n  },\n  polygonEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line === 0) this._string.push(\"Z\");\n    this._point = NaN;\n  },\n  point: function(x, y) {\n    switch (this._point) {\n      case 0: {\n        this._string.push(\"M\", x, \",\", y);\n        this._point = 1;\n        break;\n      }\n      case 1: {\n        this._string.push(\"L\", x, \",\", y);\n        break;\n      }\n      default: {\n        this._string.push(\"M\", x, \",\", y, this._circle);\n        break;\n      }\n    }\n  },\n  result: function() {\n    if (this._string.length) {\n      var result = this._string.join(\"\");\n      this._string = [];\n      return result;\n    }\n  }\n};\n\nfunction circle$1(radius) {\n  return \"m0,\" + radius\n      + \"a\" + radius + \",\" + radius + \" 0 1,1 0,\" + -2 * radius\n      + \"a\" + radius + \",\" + radius + \" 0 1,1 0,\" + 2 * radius\n      + \"z\";\n}\n\nvar index$1 = function(projection, context) {\n  var pointRadius = 4.5,\n      projectionStream,\n      contextStream;\n\n  function path(object) {\n    if (object) {\n      if (typeof pointRadius === \"function\") contextStream.pointRadius(+pointRadius.apply(this, arguments));\n      geoStream(object, projectionStream(contextStream));\n    }\n    return contextStream.result();\n  }\n\n  path.area = function(object) {\n    geoStream(object, projectionStream(areaStream$1));\n    return areaStream$1.result();\n  };\n\n  path.measure = function(object) {\n    geoStream(object, projectionStream(lengthStream$1));\n    return lengthStream$1.result();\n  };\n\n  path.bounds = function(object) {\n    geoStream(object, projectionStream(boundsStream$1));\n    return boundsStream$1.result();\n  };\n\n  path.centroid = function(object) {\n    geoStream(object, projectionStream(centroidStream$1));\n    return centroidStream$1.result();\n  };\n\n  path.projection = function(_) {\n    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;\n  };\n\n  path.context = function(_) {\n    if (!arguments.length) return context;\n    contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _);\n    if (typeof pointRadius !== \"function\") contextStream.pointRadius(pointRadius);\n    return path;\n  };\n\n  path.pointRadius = function(_) {\n    if (!arguments.length) return pointRadius;\n    pointRadius = typeof _ === \"function\" ? _ : (contextStream.pointRadius(+_), +_);\n    return path;\n  };\n\n  return path.projection(projection).context(context);\n};\n\nvar clip = function(pointVisible, clipLine, interpolate, start) {\n  return function(rotate, sink) {\n    var line = clipLine(sink),\n        rotatedStart = rotate.invert(start[0], start[1]),\n        ringBuffer = clipBuffer(),\n        ringSink = clipLine(ringBuffer),\n        polygonStarted = false,\n        polygon,\n        segments,\n        ring;\n\n    var clip = {\n      point: point,\n      lineStart: lineStart,\n      lineEnd: lineEnd,\n      polygonStart: function() {\n        clip.point = pointRing;\n        clip.lineStart = ringStart;\n        clip.lineEnd = ringEnd;\n        segments = [];\n        polygon = [];\n      },\n      polygonEnd: function() {\n        clip.point = point;\n        clip.lineStart = lineStart;\n        clip.lineEnd = lineEnd;\n        segments = merge(segments);\n        var startInside = polygonContains(polygon, rotatedStart);\n        if (segments.length) {\n          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;\n          clipPolygon(segments, compareIntersection, startInside, interpolate, sink);\n        } else if (startInside) {\n          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;\n          sink.lineStart();\n          interpolate(null, null, 1, sink);\n          sink.lineEnd();\n        }\n        if (polygonStarted) sink.polygonEnd(), polygonStarted = false;\n        segments = polygon = null;\n      },\n      sphere: function() {\n        sink.polygonStart();\n        sink.lineStart();\n        interpolate(null, null, 1, sink);\n        sink.lineEnd();\n        sink.polygonEnd();\n      }\n    };\n\n    function point(lambda, phi) {\n      var point = rotate(lambda, phi);\n      if (pointVisible(lambda = point[0], phi = point[1])) sink.point(lambda, phi);\n    }\n\n    function pointLine(lambda, phi) {\n      var point = rotate(lambda, phi);\n      line.point(point[0], point[1]);\n    }\n\n    function lineStart() {\n      clip.point = pointLine;\n      line.lineStart();\n    }\n\n    function lineEnd() {\n      clip.point = point;\n      line.lineEnd();\n    }\n\n    function pointRing(lambda, phi) {\n      ring.push([lambda, phi]);\n      var point = rotate(lambda, phi);\n      ringSink.point(point[0], point[1]);\n    }\n\n    function ringStart() {\n      ringSink.lineStart();\n      ring = [];\n    }\n\n    function ringEnd() {\n      pointRing(ring[0][0], ring[0][1]);\n      ringSink.lineEnd();\n\n      var clean = ringSink.clean(),\n          ringSegments = ringBuffer.result(),\n          i, n = ringSegments.length, m,\n          segment,\n          point;\n\n      ring.pop();\n      polygon.push(ring);\n      ring = null;\n\n      if (!n) return;\n\n      // No intersections.\n      if (clean & 1) {\n        segment = ringSegments[0];\n        if ((m = segment.length - 1) > 0) {\n          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;\n          sink.lineStart();\n          for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);\n          sink.lineEnd();\n        }\n        return;\n      }\n\n      // Rejoin connected segments.\n      // TODO reuse ringBuffer.rejoin()?\n      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));\n\n      segments.push(ringSegments.filter(validSegment));\n    }\n\n    return clip;\n  };\n};\n\nfunction validSegment(segment) {\n  return segment.length > 1;\n}\n\n// Intersections are sorted along the clip edge. For both antimeridian cutting\n// and circle clipping, the same comparison is used.\nfunction compareIntersection(a, b) {\n  return ((a = a.x)[0] < 0 ? a[1] - halfPi$2 - epsilon$2 : halfPi$2 - a[1])\n       - ((b = b.x)[0] < 0 ? b[1] - halfPi$2 - epsilon$2 : halfPi$2 - b[1]);\n}\n\nvar clipAntimeridian = clip(\n  function() { return true; },\n  clipAntimeridianLine,\n  clipAntimeridianInterpolate,\n  [-pi$3, -halfPi$2]\n);\n\n// Takes a line and cuts into visible segments. Return values: 0 - there were\n// intersections or the line was empty; 1 - no intersections; 2 - there were\n// intersections, and the first and last segments should be rejoined.\nfunction clipAntimeridianLine(stream) {\n  var lambda0 = NaN,\n      phi0 = NaN,\n      sign0 = NaN,\n      clean; // no intersections\n\n  return {\n    lineStart: function() {\n      stream.lineStart();\n      clean = 1;\n    },\n    point: function(lambda1, phi1) {\n      var sign1 = lambda1 > 0 ? pi$3 : -pi$3,\n          delta = abs(lambda1 - lambda0);\n      if (abs(delta - pi$3) < epsilon$2) { // line crosses a pole\n        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi$2 : -halfPi$2);\n        stream.point(sign0, phi0);\n        stream.lineEnd();\n        stream.lineStart();\n        stream.point(sign1, phi0);\n        stream.point(lambda1, phi0);\n        clean = 0;\n      } else if (sign0 !== sign1 && delta >= pi$3) { // line crosses antimeridian\n        if (abs(lambda0 - sign0) < epsilon$2) lambda0 -= sign0 * epsilon$2; // handle degeneracies\n        if (abs(lambda1 - sign1) < epsilon$2) lambda1 -= sign1 * epsilon$2;\n        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);\n        stream.point(sign0, phi0);\n        stream.lineEnd();\n        stream.lineStart();\n        stream.point(sign1, phi0);\n        clean = 0;\n      }\n      stream.point(lambda0 = lambda1, phi0 = phi1);\n      sign0 = sign1;\n    },\n    lineEnd: function() {\n      stream.lineEnd();\n      lambda0 = phi0 = NaN;\n    },\n    clean: function() {\n      return 2 - clean; // if intersections, rejoin first and last segments\n    }\n  };\n}\n\nfunction clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {\n  var cosPhi0,\n      cosPhi1,\n      sinLambda0Lambda1 = sin$1(lambda0 - lambda1);\n  return abs(sinLambda0Lambda1) > epsilon$2\n      ? atan((sin$1(phi0) * (cosPhi1 = cos$1(phi1)) * sin$1(lambda1)\n          - sin$1(phi1) * (cosPhi0 = cos$1(phi0)) * sin$1(lambda0))\n          / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))\n      : (phi0 + phi1) / 2;\n}\n\nfunction clipAntimeridianInterpolate(from, to, direction, stream) {\n  var phi;\n  if (from == null) {\n    phi = direction * halfPi$2;\n    stream.point(-pi$3, phi);\n    stream.point(0, phi);\n    stream.point(pi$3, phi);\n    stream.point(pi$3, 0);\n    stream.point(pi$3, -phi);\n    stream.point(0, -phi);\n    stream.point(-pi$3, -phi);\n    stream.point(-pi$3, 0);\n    stream.point(-pi$3, phi);\n  } else if (abs(from[0] - to[0]) > epsilon$2) {\n    var lambda = from[0] < to[0] ? pi$3 : -pi$3;\n    phi = direction * lambda / 2;\n    stream.point(-lambda, phi);\n    stream.point(0, phi);\n    stream.point(lambda, phi);\n  } else {\n    stream.point(to[0], to[1]);\n  }\n}\n\nvar clipCircle = function(radius, delta) {\n  var cr = cos$1(radius),\n      smallRadius = cr > 0,\n      notHemisphere = abs(cr) > epsilon$2; // TODO optimise for this common case\n\n  function interpolate(from, to, direction, stream) {\n    circleStream(stream, radius, delta, direction, from, to);\n  }\n\n  function visible(lambda, phi) {\n    return cos$1(lambda) * cos$1(phi) > cr;\n  }\n\n  // Takes a line and cuts into visible segments. Return values used for polygon\n  // clipping: 0 - there were intersections or the line was empty; 1 - no\n  // intersections 2 - there were intersections, and the first and last segments\n  // should be rejoined.\n  function clipLine(stream) {\n    var point0, // previous point\n        c0, // code for previous point\n        v0, // visibility of previous point\n        v00, // visibility of first point\n        clean; // no intersections\n    return {\n      lineStart: function() {\n        v00 = v0 = false;\n        clean = 1;\n      },\n      point: function(lambda, phi) {\n        var point1 = [lambda, phi],\n            point2,\n            v = visible(lambda, phi),\n            c = smallRadius\n              ? v ? 0 : code(lambda, phi)\n              : v ? code(lambda + (lambda < 0 ? pi$3 : -pi$3), phi) : 0;\n        if (!point0 && (v00 = v0 = v)) stream.lineStart();\n        // Handle degeneracies.\n        // TODO ignore if not clipping polygons.\n        if (v !== v0) {\n          point2 = intersect(point0, point1);\n          if (pointEqual(point0, point2) || pointEqual(point1, point2)) {\n            point1[0] += epsilon$2;\n            point1[1] += epsilon$2;\n            v = visible(point1[0], point1[1]);\n          }\n        }\n        if (v !== v0) {\n          clean = 0;\n          if (v) {\n            // outside going in\n            stream.lineStart();\n            point2 = intersect(point1, point0);\n            stream.point(point2[0], point2[1]);\n          } else {\n            // inside going out\n            point2 = intersect(point0, point1);\n            stream.point(point2[0], point2[1]);\n            stream.lineEnd();\n          }\n          point0 = point2;\n        } else if (notHemisphere && point0 && smallRadius ^ v) {\n          var t;\n          // If the codes for two points are different, or are both zero,\n          // and there this segment intersects with the small circle.\n          if (!(c & c0) && (t = intersect(point1, point0, true))) {\n            clean = 0;\n            if (smallRadius) {\n              stream.lineStart();\n              stream.point(t[0][0], t[0][1]);\n              stream.point(t[1][0], t[1][1]);\n              stream.lineEnd();\n            } else {\n              stream.point(t[1][0], t[1][1]);\n              stream.lineEnd();\n              stream.lineStart();\n              stream.point(t[0][0], t[0][1]);\n            }\n          }\n        }\n        if (v && (!point0 || !pointEqual(point0, point1))) {\n          stream.point(point1[0], point1[1]);\n        }\n        point0 = point1, v0 = v, c0 = c;\n      },\n      lineEnd: function() {\n        if (v0) stream.lineEnd();\n        point0 = null;\n      },\n      // Rejoin first and last segments if there were intersections and the first\n      // and last points were visible.\n      clean: function() {\n        return clean | ((v00 && v0) << 1);\n      }\n    };\n  }\n\n  // Intersects the great circle between a and b with the clip circle.\n  function intersect(a, b, two) {\n    var pa = cartesian(a),\n        pb = cartesian(b);\n\n    // We have two planes, n1.p = d1 and n2.p = d2.\n    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).\n    var n1 = [1, 0, 0], // normal\n        n2 = cartesianCross(pa, pb),\n        n2n2 = cartesianDot(n2, n2),\n        n1n2 = n2[0], // cartesianDot(n1, n2),\n        determinant = n2n2 - n1n2 * n1n2;\n\n    // Two polar points.\n    if (!determinant) return !two && a;\n\n    var c1 =  cr * n2n2 / determinant,\n        c2 = -cr * n1n2 / determinant,\n        n1xn2 = cartesianCross(n1, n2),\n        A = cartesianScale(n1, c1),\n        B = cartesianScale(n2, c2);\n    cartesianAddInPlace(A, B);\n\n    // Solve |p(t)|^2 = 1.\n    var u = n1xn2,\n        w = cartesianDot(A, u),\n        uu = cartesianDot(u, u),\n        t2 = w * w - uu * (cartesianDot(A, A) - 1);\n\n    if (t2 < 0) return;\n\n    var t = sqrt(t2),\n        q = cartesianScale(u, (-w - t) / uu);\n    cartesianAddInPlace(q, A);\n    q = spherical(q);\n\n    if (!two) return q;\n\n    // Two intersection points.\n    var lambda0 = a[0],\n        lambda1 = b[0],\n        phi0 = a[1],\n        phi1 = b[1],\n        z;\n\n    if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;\n\n    var delta = lambda1 - lambda0,\n        polar = abs(delta - pi$3) < epsilon$2,\n        meridian = polar || delta < epsilon$2;\n\n    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;\n\n    // Check that the first point is between a and b.\n    if (meridian\n        ? polar\n          ? phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon$2 ? phi0 : phi1)\n          : phi0 <= q[1] && q[1] <= phi1\n        : delta > pi$3 ^ (lambda0 <= q[0] && q[0] <= lambda1)) {\n      var q1 = cartesianScale(u, (-w + t) / uu);\n      cartesianAddInPlace(q1, A);\n      return [q, spherical(q1)];\n    }\n  }\n\n  // Generates a 4-bit vector representing the location of a point relative to\n  // the small circle's bounding box.\n  function code(lambda, phi) {\n    var r = smallRadius ? radius : pi$3 - radius,\n        code = 0;\n    if (lambda < -r) code |= 1; // left\n    else if (lambda > r) code |= 2; // right\n    if (phi < -r) code |= 4; // below\n    else if (phi > r) code |= 8; // above\n    return code;\n  }\n\n  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$3, radius - pi$3]);\n};\n\nvar transform = function(methods) {\n  return {\n    stream: transformer(methods)\n  };\n};\n\nfunction transformer(methods) {\n  return function(stream) {\n    var s = new TransformStream;\n    for (var key in methods) s[key] = methods[key];\n    s.stream = stream;\n    return s;\n  };\n}\n\nfunction TransformStream() {}\n\nTransformStream.prototype = {\n  constructor: TransformStream,\n  point: function(x, y) { this.stream.point(x, y); },\n  sphere: function() { this.stream.sphere(); },\n  lineStart: function() { this.stream.lineStart(); },\n  lineEnd: function() { this.stream.lineEnd(); },\n  polygonStart: function() { this.stream.polygonStart(); },\n  polygonEnd: function() { this.stream.polygonEnd(); }\n};\n\nfunction fitExtent(projection, extent, object) {\n  var w = extent[1][0] - extent[0][0],\n      h = extent[1][1] - extent[0][1],\n      clip = projection.clipExtent && projection.clipExtent();\n\n  projection\n      .scale(150)\n      .translate([0, 0]);\n\n  if (clip != null) projection.clipExtent(null);\n\n  geoStream(object, projection.stream(boundsStream$1));\n\n  var b = boundsStream$1.result(),\n      k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),\n      x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,\n      y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;\n\n  if (clip != null) projection.clipExtent(clip);\n\n  return projection\n      .scale(k * 150)\n      .translate([x, y]);\n}\n\nfunction fitSize(projection, size, object) {\n  return fitExtent(projection, [[0, 0], size], object);\n}\n\nvar maxDepth = 16;\nvar cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance)\n\nvar resample = function(project, delta2) {\n  return +delta2 ? resample$1(project, delta2) : resampleNone(project);\n};\n\nfunction resampleNone(project) {\n  return transformer({\n    point: function(x, y) {\n      x = project(x, y);\n      this.stream.point(x[0], x[1]);\n    }\n  });\n}\n\nfunction resample$1(project, delta2) {\n\n  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {\n    var dx = x1 - x0,\n        dy = y1 - y0,\n        d2 = dx * dx + dy * dy;\n    if (d2 > 4 * delta2 && depth--) {\n      var a = a0 + a1,\n          b = b0 + b1,\n          c = c0 + c1,\n          m = sqrt(a * a + b * b + c * c),\n          phi2 = asin(c /= m),\n          lambda2 = abs(abs(c) - 1) < epsilon$2 || abs(lambda0 - lambda1) < epsilon$2 ? (lambda0 + lambda1) / 2 : atan2(b, a),\n          p = project(lambda2, phi2),\n          x2 = p[0],\n          y2 = p[1],\n          dx2 = x2 - x0,\n          dy2 = y2 - y0,\n          dz = dy * dx2 - dx * dy2;\n      if (dz * dz / d2 > delta2 // perpendicular projected distance\n          || abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end\n          || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance\n        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);\n        stream.point(x2, y2);\n        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);\n      }\n    }\n  }\n  return function(stream) {\n    var lambda00, x00, y00, a00, b00, c00, // first point\n        lambda0, x0, y0, a0, b0, c0; // previous point\n\n    var resampleStream = {\n      point: point,\n      lineStart: lineStart,\n      lineEnd: lineEnd,\n      polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },\n      polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }\n    };\n\n    function point(x, y) {\n      x = project(x, y);\n      stream.point(x[0], x[1]);\n    }\n\n    function lineStart() {\n      x0 = NaN;\n      resampleStream.point = linePoint;\n      stream.lineStart();\n    }\n\n    function linePoint(lambda, phi) {\n      var c = cartesian([lambda, phi]), p = project(lambda, phi);\n      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);\n      stream.point(x0, y0);\n    }\n\n    function lineEnd() {\n      resampleStream.point = point;\n      stream.lineEnd();\n    }\n\n    function ringStart() {\n      lineStart();\n      resampleStream.point = ringPoint;\n      resampleStream.lineEnd = ringEnd;\n    }\n\n    function ringPoint(lambda, phi) {\n      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;\n      resampleStream.point = linePoint;\n    }\n\n    function ringEnd() {\n      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);\n      resampleStream.lineEnd = lineEnd;\n      lineEnd();\n    }\n\n    return resampleStream;\n  };\n}\n\nvar transformRadians = transformer({\n  point: function(x, y) {\n    this.stream.point(x * radians, y * radians);\n  }\n});\n\nfunction projection(project) {\n  return projectionMutator(function() { return project; })();\n}\n\nfunction projectionMutator(projectAt) {\n  var project,\n      k = 150, // scale\n      x = 480, y = 250, // translate\n      dx, dy, lambda = 0, phi = 0, // center\n      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, projectRotate, // rotate\n      theta = null, preclip = clipAntimeridian, // clip angle\n      x0 = null, y0, x1, y1, postclip = identity$4, // clip extent\n      delta2 = 0.5, projectResample = resample(projectTransform, delta2), // precision\n      cache,\n      cacheStream;\n\n  function projection(point) {\n    point = projectRotate(point[0] * radians, point[1] * radians);\n    return [point[0] * k + dx, dy - point[1] * k];\n  }\n\n  function invert(point) {\n    point = projectRotate.invert((point[0] - dx) / k, (dy - point[1]) / k);\n    return point && [point[0] * degrees$1, point[1] * degrees$1];\n  }\n\n  function projectTransform(x, y) {\n    return x = project(x, y), [x[0] * k + dx, dy - x[1] * k];\n  }\n\n  projection.stream = function(stream) {\n    return cache && cacheStream === stream ? cache : cache = transformRadians(preclip(rotate, projectResample(postclip(cacheStream = stream))));\n  };\n\n  projection.clipAngle = function(_) {\n    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians, 6 * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;\n  };\n\n  projection.clipExtent = function(_) {\n    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];\n  };\n\n  projection.scale = function(_) {\n    return arguments.length ? (k = +_, recenter()) : k;\n  };\n\n  projection.translate = function(_) {\n    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];\n  };\n\n  projection.center = function(_) {\n    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];\n  };\n\n  projection.rotate = function(_) {\n    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];\n  };\n\n  projection.precision = function(_) {\n    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);\n  };\n\n  projection.fitExtent = function(extent, object) {\n    return fitExtent(projection, extent, object);\n  };\n\n  projection.fitSize = function(size, object) {\n    return fitSize(projection, size, object);\n  };\n\n  function recenter() {\n    projectRotate = compose(rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma), project);\n    var center = project(lambda, phi);\n    dx = x - center[0] * k;\n    dy = y + center[1] * k;\n    return reset();\n  }\n\n  function reset() {\n    cache = cacheStream = null;\n    return projection;\n  }\n\n  return function() {\n    project = projectAt.apply(this, arguments);\n    projection.invert = project.invert && invert;\n    return recenter();\n  };\n}\n\nfunction conicProjection(projectAt) {\n  var phi0 = 0,\n      phi1 = pi$3 / 3,\n      m = projectionMutator(projectAt),\n      p = m(phi0, phi1);\n\n  p.parallels = function(_) {\n    return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees$1, phi1 * degrees$1];\n  };\n\n  return p;\n}\n\nfunction cylindricalEqualAreaRaw(phi0) {\n  var cosPhi0 = cos$1(phi0);\n\n  function forward(lambda, phi) {\n    return [lambda * cosPhi0, sin$1(phi) / cosPhi0];\n  }\n\n  forward.invert = function(x, y) {\n    return [x / cosPhi0, asin(y * cosPhi0)];\n  };\n\n  return forward;\n}\n\nfunction conicEqualAreaRaw(y0, y1) {\n  var sy0 = sin$1(y0), n = (sy0 + sin$1(y1)) / 2;\n\n  // Are the parallels symmetrical around the Equator?\n  if (abs(n) < epsilon$2) return cylindricalEqualAreaRaw(y0);\n\n  var c = 1 + sy0 * (2 * n - sy0), r0 = sqrt(c) / n;\n\n  function project(x, y) {\n    var r = sqrt(c - 2 * n * sin$1(y)) / n;\n    return [r * sin$1(x *= n), r0 - r * cos$1(x)];\n  }\n\n  project.invert = function(x, y) {\n    var r0y = r0 - y;\n    return [atan2(x, abs(r0y)) / n * sign(r0y), asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];\n  };\n\n  return project;\n}\n\nvar conicEqualArea = function() {\n  return conicProjection(conicEqualAreaRaw)\n      .scale(155.424)\n      .center([0, 33.6442]);\n};\n\nvar albers = function() {\n  return conicEqualArea()\n      .parallels([29.5, 45.5])\n      .scale(1070)\n      .translate([480, 250])\n      .rotate([96, 0])\n      .center([-0.6, 38.7]);\n};\n\n// The projections must have mutually exclusive clip regions on the sphere,\n// as this will avoid emitting interleaving lines and polygons.\nfunction multiplex(streams) {\n  var n = streams.length;\n  return {\n    point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },\n    sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },\n    lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },\n    lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },\n    polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },\n    polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }\n  };\n}\n\n// A composite projection for the United States, configured by default for\n// 960×500. The projection also works quite well at 960×600 if you change the\n// scale to 1285 and adjust the translate accordingly. The set of standard\n// parallels for each region comes from USGS, which is published here:\n// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers\nvar albersUsa = function() {\n  var cache,\n      cacheStream,\n      lower48 = albers(), lower48Point,\n      alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338\n      hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007\n      point, pointStream = {point: function(x, y) { point = [x, y]; }};\n\n  function albersUsa(coordinates) {\n    var x = coordinates[0], y = coordinates[1];\n    return point = null,\n        (lower48Point.point(x, y), point)\n        || (alaskaPoint.point(x, y), point)\n        || (hawaiiPoint.point(x, y), point);\n  }\n\n  albersUsa.invert = function(coordinates) {\n    var k = lower48.scale(),\n        t = lower48.translate(),\n        x = (coordinates[0] - t[0]) / k,\n        y = (coordinates[1] - t[1]) / k;\n    return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska\n        : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii\n        : lower48).invert(coordinates);\n  };\n\n  albersUsa.stream = function(stream) {\n    return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);\n  };\n\n  albersUsa.precision = function(_) {\n    if (!arguments.length) return lower48.precision();\n    lower48.precision(_), alaska.precision(_), hawaii.precision(_);\n    return reset();\n  };\n\n  albersUsa.scale = function(_) {\n    if (!arguments.length) return lower48.scale();\n    lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);\n    return albersUsa.translate(lower48.translate());\n  };\n\n  albersUsa.translate = function(_) {\n    if (!arguments.length) return lower48.translate();\n    var k = lower48.scale(), x = +_[0], y = +_[1];\n\n    lower48Point = lower48\n        .translate(_)\n        .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])\n        .stream(pointStream);\n\n    alaskaPoint = alaska\n        .translate([x - 0.307 * k, y + 0.201 * k])\n        .clipExtent([[x - 0.425 * k + epsilon$2, y + 0.120 * k + epsilon$2], [x - 0.214 * k - epsilon$2, y + 0.234 * k - epsilon$2]])\n        .stream(pointStream);\n\n    hawaiiPoint = hawaii\n        .translate([x - 0.205 * k, y + 0.212 * k])\n        .clipExtent([[x - 0.214 * k + epsilon$2, y + 0.166 * k + epsilon$2], [x - 0.115 * k - epsilon$2, y + 0.234 * k - epsilon$2]])\n        .stream(pointStream);\n\n    return reset();\n  };\n\n  albersUsa.fitExtent = function(extent, object) {\n    return fitExtent(albersUsa, extent, object);\n  };\n\n  albersUsa.fitSize = function(size, object) {\n    return fitSize(albersUsa, size, object);\n  };\n\n  function reset() {\n    cache = cacheStream = null;\n    return albersUsa;\n  }\n\n  return albersUsa.scale(1070);\n};\n\nfunction azimuthalRaw(scale) {\n  return function(x, y) {\n    var cx = cos$1(x),\n        cy = cos$1(y),\n        k = scale(cx * cy);\n    return [\n      k * cy * sin$1(x),\n      k * sin$1(y)\n    ];\n  }\n}\n\nfunction azimuthalInvert(angle) {\n  return function(x, y) {\n    var z = sqrt(x * x + y * y),\n        c = angle(z),\n        sc = sin$1(c),\n        cc = cos$1(c);\n    return [\n      atan2(x * sc, z * cc),\n      asin(z && y * sc / z)\n    ];\n  }\n}\n\nvar azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) {\n  return sqrt(2 / (1 + cxcy));\n});\n\nazimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) {\n  return 2 * asin(z / 2);\n});\n\nvar azimuthalEqualArea = function() {\n  return projection(azimuthalEqualAreaRaw)\n      .scale(124.75)\n      .clipAngle(180 - 1e-3);\n};\n\nvar azimuthalEquidistantRaw = azimuthalRaw(function(c) {\n  return (c = acos(c)) && c / sin$1(c);\n});\n\nazimuthalEquidistantRaw.invert = azimuthalInvert(function(z) {\n  return z;\n});\n\nvar azimuthalEquidistant = function() {\n  return projection(azimuthalEquidistantRaw)\n      .scale(79.4188)\n      .clipAngle(180 - 1e-3);\n};\n\nfunction mercatorRaw(lambda, phi) {\n  return [lambda, log(tan((halfPi$2 + phi) / 2))];\n}\n\nmercatorRaw.invert = function(x, y) {\n  return [x, 2 * atan(exp(y)) - halfPi$2];\n};\n\nvar mercator = function() {\n  return mercatorProjection(mercatorRaw)\n      .scale(961 / tau$3);\n};\n\nfunction mercatorProjection(project) {\n  var m = projection(project),\n      center = m.center,\n      scale = m.scale,\n      translate = m.translate,\n      clipExtent = m.clipExtent,\n      x0 = null, y0, x1, y1; // clip extent\n\n  m.scale = function(_) {\n    return arguments.length ? (scale(_), reclip()) : scale();\n  };\n\n  m.translate = function(_) {\n    return arguments.length ? (translate(_), reclip()) : translate();\n  };\n\n  m.center = function(_) {\n    return arguments.length ? (center(_), reclip()) : center();\n  };\n\n  m.clipExtent = function(_) {\n    return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];\n  };\n\n  function reclip() {\n    var k = pi$3 * scale(),\n        t = m(rotation(m.rotate()).invert([0, 0]));\n    return clipExtent(x0 == null\n        ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw\n        ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]]\n        : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);\n  }\n\n  return reclip();\n}\n\nfunction tany(y) {\n  return tan((halfPi$2 + y) / 2);\n}\n\nfunction conicConformalRaw(y0, y1) {\n  var cy0 = cos$1(y0),\n      n = y0 === y1 ? sin$1(y0) : log(cy0 / cos$1(y1)) / log(tany(y1) / tany(y0)),\n      f = cy0 * pow(tany(y0), n) / n;\n\n  if (!n) return mercatorRaw;\n\n  function project(x, y) {\n    if (f > 0) { if (y < -halfPi$2 + epsilon$2) y = -halfPi$2 + epsilon$2; }\n    else { if (y > halfPi$2 - epsilon$2) y = halfPi$2 - epsilon$2; }\n    var r = f / pow(tany(y), n);\n    return [r * sin$1(n * x), f - r * cos$1(n * x)];\n  }\n\n  project.invert = function(x, y) {\n    var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy);\n    return [atan2(x, abs(fy)) / n * sign(fy), 2 * atan(pow(f / r, 1 / n)) - halfPi$2];\n  };\n\n  return project;\n}\n\nvar conicConformal = function() {\n  return conicProjection(conicConformalRaw)\n      .scale(109.5)\n      .parallels([30, 30]);\n};\n\nfunction equirectangularRaw(lambda, phi) {\n  return [lambda, phi];\n}\n\nequirectangularRaw.invert = equirectangularRaw;\n\nvar equirectangular = function() {\n  return projection(equirectangularRaw)\n      .scale(152.63);\n};\n\nfunction conicEquidistantRaw(y0, y1) {\n  var cy0 = cos$1(y0),\n      n = y0 === y1 ? sin$1(y0) : (cy0 - cos$1(y1)) / (y1 - y0),\n      g = cy0 / n + y0;\n\n  if (abs(n) < epsilon$2) return equirectangularRaw;\n\n  function project(x, y) {\n    var gy = g - y, nx = n * x;\n    return [gy * sin$1(nx), g - gy * cos$1(nx)];\n  }\n\n  project.invert = function(x, y) {\n    var gy = g - y;\n    return [atan2(x, abs(gy)) / n * sign(gy), g - sign(n) * sqrt(x * x + gy * gy)];\n  };\n\n  return project;\n}\n\nvar conicEquidistant = function() {\n  return conicProjection(conicEquidistantRaw)\n      .scale(131.154)\n      .center([0, 13.9389]);\n};\n\nfunction gnomonicRaw(x, y) {\n  var cy = cos$1(y), k = cos$1(x) * cy;\n  return [cy * sin$1(x) / k, sin$1(y) / k];\n}\n\ngnomonicRaw.invert = azimuthalInvert(atan);\n\nvar gnomonic = function() {\n  return projection(gnomonicRaw)\n      .scale(144.049)\n      .clipAngle(60);\n};\n\nfunction scaleTranslate(kx, ky, tx, ty) {\n  return kx === 1 && ky === 1 && tx === 0 && ty === 0 ? identity$4 : transformer({\n    point: function(x, y) {\n      this.stream.point(x * kx + tx, y * ky + ty);\n    }\n  });\n}\n\nvar identity$5 = function() {\n  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, transform = identity$4, // scale, translate and reflect\n      x0 = null, y0, x1, y1, clip = identity$4, // clip extent\n      cache,\n      cacheStream,\n      projection;\n\n  function reset() {\n    cache = cacheStream = null;\n    return projection;\n  }\n\n  return projection = {\n    stream: function(stream) {\n      return cache && cacheStream === stream ? cache : cache = transform(clip(cacheStream = stream));\n    },\n    clipExtent: function(_) {\n      return arguments.length ? (clip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];\n    },\n    scale: function(_) {\n      return arguments.length ? (transform = scaleTranslate((k = +_) * sx, k * sy, tx, ty), reset()) : k;\n    },\n    translate: function(_) {\n      return arguments.length ? (transform = scaleTranslate(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty];\n    },\n    reflectX: function(_) {\n      return arguments.length ? (transform = scaleTranslate(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0;\n    },\n    reflectY: function(_) {\n      return arguments.length ? (transform = scaleTranslate(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0;\n    },\n    fitExtent: function(extent, object) {\n      return fitExtent(projection, extent, object);\n    },\n    fitSize: function(size, object) {\n      return fitSize(projection, size, object);\n    }\n  };\n};\n\nfunction orthographicRaw(x, y) {\n  return [cos$1(y) * sin$1(x), sin$1(y)];\n}\n\northographicRaw.invert = azimuthalInvert(asin);\n\nvar orthographic = function() {\n  return projection(orthographicRaw)\n      .scale(249.5)\n      .clipAngle(90 + epsilon$2);\n};\n\nfunction stereographicRaw(x, y) {\n  var cy = cos$1(y), k = 1 + cos$1(x) * cy;\n  return [cy * sin$1(x) / k, sin$1(y) / k];\n}\n\nstereographicRaw.invert = azimuthalInvert(function(z) {\n  return 2 * atan(z);\n});\n\nvar stereographic = function() {\n  return projection(stereographicRaw)\n      .scale(250)\n      .clipAngle(142);\n};\n\nfunction transverseMercatorRaw(lambda, phi) {\n  return [log(tan((halfPi$2 + phi) / 2)), -lambda];\n}\n\ntransverseMercatorRaw.invert = function(x, y) {\n  return [-y, 2 * atan(exp(x)) - halfPi$2];\n};\n\nvar transverseMercator = function() {\n  var m = mercatorProjection(transverseMercatorRaw),\n      center = m.center,\n      rotate = m.rotate;\n\n  m.center = function(_) {\n    return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);\n  };\n\n  m.rotate = function(_) {\n    return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);\n  };\n\n  return rotate([0, 0, 90])\n      .scale(159.155);\n};\n\nfunction defaultSeparation(a, b) {\n  return a.parent === b.parent ? 1 : 2;\n}\n\nfunction meanX(children) {\n  return children.reduce(meanXReduce, 0) / children.length;\n}\n\nfunction meanXReduce(x, c) {\n  return x + c.x;\n}\n\nfunction maxY(children) {\n  return 1 + children.reduce(maxYReduce, 0);\n}\n\nfunction maxYReduce(y, c) {\n  return Math.max(y, c.y);\n}\n\nfunction leafLeft(node) {\n  var children;\n  while (children = node.children) node = children[0];\n  return node;\n}\n\nfunction leafRight(node) {\n  var children;\n  while (children = node.children) node = children[children.length - 1];\n  return node;\n}\n\nvar cluster = function() {\n  var separation = defaultSeparation,\n      dx = 1,\n      dy = 1,\n      nodeSize = false;\n\n  function cluster(root) {\n    var previousNode,\n        x = 0;\n\n    // First walk, computing the initial x & y values.\n    root.eachAfter(function(node) {\n      var children = node.children;\n      if (children) {\n        node.x = meanX(children);\n        node.y = maxY(children);\n      } else {\n        node.x = previousNode ? x += separation(node, previousNode) : 0;\n        node.y = 0;\n        previousNode = node;\n      }\n    });\n\n    var left = leafLeft(root),\n        right = leafRight(root),\n        x0 = left.x - separation(left, right) / 2,\n        x1 = right.x + separation(right, left) / 2;\n\n    // Second walk, normalizing x & y to the desired size.\n    return root.eachAfter(nodeSize ? function(node) {\n      node.x = (node.x - root.x) * dx;\n      node.y = (root.y - node.y) * dy;\n    } : function(node) {\n      node.x = (node.x - x0) / (x1 - x0) * dx;\n      node.y = (1 - (root.y ? node.y / root.y : 1)) * dy;\n    });\n  }\n\n  cluster.separation = function(x) {\n    return arguments.length ? (separation = x, cluster) : separation;\n  };\n\n  cluster.size = function(x) {\n    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? null : [dx, dy]);\n  };\n\n  cluster.nodeSize = function(x) {\n    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? [dx, dy] : null);\n  };\n\n  return cluster;\n};\n\nfunction count(node) {\n  var sum = 0,\n      children = node.children,\n      i = children && children.length;\n  if (!i) sum = 1;\n  else while (--i >= 0) sum += children[i].value;\n  node.value = sum;\n}\n\nvar node_count = function() {\n  return this.eachAfter(count);\n};\n\nvar node_each = function(callback) {\n  var node = this, current, next = [node], children, i, n;\n  do {\n    current = next.reverse(), next = [];\n    while (node = current.pop()) {\n      callback(node), children = node.children;\n      if (children) for (i = 0, n = children.length; i < n; ++i) {\n        next.push(children[i]);\n      }\n    }\n  } while (next.length);\n  return this;\n};\n\nvar node_eachBefore = function(callback) {\n  var node = this, nodes = [node], children, i;\n  while (node = nodes.pop()) {\n    callback(node), children = node.children;\n    if (children) for (i = children.length - 1; i >= 0; --i) {\n      nodes.push(children[i]);\n    }\n  }\n  return this;\n};\n\nvar node_eachAfter = function(callback) {\n  var node = this, nodes = [node], next = [], children, i, n;\n  while (node = nodes.pop()) {\n    next.push(node), children = node.children;\n    if (children) for (i = 0, n = children.length; i < n; ++i) {\n      nodes.push(children[i]);\n    }\n  }\n  while (node = next.pop()) {\n    callback(node);\n  }\n  return this;\n};\n\nvar node_sum = function(value) {\n  return this.eachAfter(function(node) {\n    var sum = +value(node.data) || 0,\n        children = node.children,\n        i = children && children.length;\n    while (--i >= 0) sum += children[i].value;\n    node.value = sum;\n  });\n};\n\nvar node_sort = function(compare) {\n  return this.eachBefore(function(node) {\n    if (node.children) {\n      node.children.sort(compare);\n    }\n  });\n};\n\nvar node_path = function(end) {\n  var start = this,\n      ancestor = leastCommonAncestor(start, end),\n      nodes = [start];\n  while (start !== ancestor) {\n    start = start.parent;\n    nodes.push(start);\n  }\n  var k = nodes.length;\n  while (end !== ancestor) {\n    nodes.splice(k, 0, end);\n    end = end.parent;\n  }\n  return nodes;\n};\n\nfunction leastCommonAncestor(a, b) {\n  if (a === b) return a;\n  var aNodes = a.ancestors(),\n      bNodes = b.ancestors(),\n      c = null;\n  a = aNodes.pop();\n  b = bNodes.pop();\n  while (a === b) {\n    c = a;\n    a = aNodes.pop();\n    b = bNodes.pop();\n  }\n  return c;\n}\n\nvar node_ancestors = function() {\n  var node = this, nodes = [node];\n  while (node = node.parent) {\n    nodes.push(node);\n  }\n  return nodes;\n};\n\nvar node_descendants = function() {\n  var nodes = [];\n  this.each(function(node) {\n    nodes.push(node);\n  });\n  return nodes;\n};\n\nvar node_leaves = function() {\n  var leaves = [];\n  this.eachBefore(function(node) {\n    if (!node.children) {\n      leaves.push(node);\n    }\n  });\n  return leaves;\n};\n\nvar node_links = function() {\n  var root = this, links = [];\n  root.each(function(node) {\n    if (node !== root) { // Don’t include the root’s parent, if any.\n      links.push({source: node.parent, target: node});\n    }\n  });\n  return links;\n};\n\nfunction hierarchy(data, children) {\n  var root = new Node(data),\n      valued = +data.value && (root.value = data.value),\n      node,\n      nodes = [root],\n      child,\n      childs,\n      i,\n      n;\n\n  if (children == null) children = defaultChildren;\n\n  while (node = nodes.pop()) {\n    if (valued) node.value = +node.data.value;\n    if ((childs = children(node.data)) && (n = childs.length)) {\n      node.children = new Array(n);\n      for (i = n - 1; i >= 0; --i) {\n        nodes.push(child = node.children[i] = new Node(childs[i]));\n        child.parent = node;\n        child.depth = node.depth + 1;\n      }\n    }\n  }\n\n  return root.eachBefore(computeHeight);\n}\n\nfunction node_copy() {\n  return hierarchy(this).eachBefore(copyData);\n}\n\nfunction defaultChildren(d) {\n  return d.children;\n}\n\nfunction copyData(node) {\n  node.data = node.data.data;\n}\n\nfunction computeHeight(node) {\n  var height = 0;\n  do node.height = height;\n  while ((node = node.parent) && (node.height < ++height));\n}\n\nfunction Node(data) {\n  this.data = data;\n  this.depth =\n  this.height = 0;\n  this.parent = null;\n}\n\nNode.prototype = hierarchy.prototype = {\n  constructor: Node,\n  count: node_count,\n  each: node_each,\n  eachAfter: node_eachAfter,\n  eachBefore: node_eachBefore,\n  sum: node_sum,\n  sort: node_sort,\n  path: node_path,\n  ancestors: node_ancestors,\n  descendants: node_descendants,\n  leaves: node_leaves,\n  links: node_links,\n  copy: node_copy\n};\n\nfunction Node$2(value) {\n  this._ = value;\n  this.next = null;\n}\n\nvar shuffle$1 = function(array) {\n  var i,\n      n = (array = array.slice()).length,\n      head = null,\n      node = head;\n\n  while (n) {\n    var next = new Node$2(array[n - 1]);\n    if (node) node = node.next = next;\n    else node = head = next;\n    array[i] = array[--n];\n  }\n\n  return {\n    head: head,\n    tail: node\n  };\n};\n\nvar enclose = function(circles) {\n  return encloseN(shuffle$1(circles), []);\n};\n\nfunction encloses(a, b) {\n  var dx = b.x - a.x,\n      dy = b.y - a.y,\n      dr = a.r - b.r;\n  return dr * dr + 1e-6 > dx * dx + dy * dy;\n}\n\n// Returns the smallest circle that contains circles L and intersects circles B.\nfunction encloseN(L, B) {\n  var circle,\n      l0 = null,\n      l1 = L.head,\n      l2,\n      p1;\n\n  switch (B.length) {\n    case 1: circle = enclose1(B[0]); break;\n    case 2: circle = enclose2(B[0], B[1]); break;\n    case 3: circle = enclose3(B[0], B[1], B[2]); break;\n  }\n\n  while (l1) {\n    p1 = l1._, l2 = l1.next;\n    if (!circle || !encloses(circle, p1)) {\n\n      // Temporarily truncate L before l1.\n      if (l0) L.tail = l0, l0.next = null;\n      else L.head = L.tail = null;\n\n      B.push(p1);\n      circle = encloseN(L, B); // Note: reorders L!\n      B.pop();\n\n      // Move l1 to the front of L and reconnect the truncated list L.\n      if (L.head) l1.next = L.head, L.head = l1;\n      else l1.next = null, L.head = L.tail = l1;\n      l0 = L.tail, l0.next = l2;\n\n    } else {\n      l0 = l1;\n    }\n    l1 = l2;\n  }\n\n  L.tail = l0;\n  return circle;\n}\n\nfunction enclose1(a) {\n  return {\n    x: a.x,\n    y: a.y,\n    r: a.r\n  };\n}\n\nfunction enclose2(a, b) {\n  var x1 = a.x, y1 = a.y, r1 = a.r,\n      x2 = b.x, y2 = b.y, r2 = b.r,\n      x21 = x2 - x1, y21 = y2 - y1, r21 = r2 - r1,\n      l = Math.sqrt(x21 * x21 + y21 * y21);\n  return {\n    x: (x1 + x2 + x21 / l * r21) / 2,\n    y: (y1 + y2 + y21 / l * r21) / 2,\n    r: (l + r1 + r2) / 2\n  };\n}\n\nfunction enclose3(a, b, c) {\n  var x1 = a.x, y1 = a.y, r1 = a.r,\n      x2 = b.x, y2 = b.y, r2 = b.r,\n      x3 = c.x, y3 = c.y, r3 = c.r,\n      a2 = 2 * (x1 - x2),\n      b2 = 2 * (y1 - y2),\n      c2 = 2 * (r2 - r1),\n      d2 = x1 * x1 + y1 * y1 - r1 * r1 - x2 * x2 - y2 * y2 + r2 * r2,\n      a3 = 2 * (x1 - x3),\n      b3 = 2 * (y1 - y3),\n      c3 = 2 * (r3 - r1),\n      d3 = x1 * x1 + y1 * y1 - r1 * r1 - x3 * x3 - y3 * y3 + r3 * r3,\n      ab = a3 * b2 - a2 * b3,\n      xa = (b2 * d3 - b3 * d2) / ab - x1,\n      xb = (b3 * c2 - b2 * c3) / ab,\n      ya = (a3 * d2 - a2 * d3) / ab - y1,\n      yb = (a2 * c3 - a3 * c2) / ab,\n      A = xb * xb + yb * yb - 1,\n      B = 2 * (xa * xb + ya * yb + r1),\n      C = xa * xa + ya * ya - r1 * r1,\n      r = (-B - Math.sqrt(B * B - 4 * A * C)) / (2 * A);\n  return {\n    x: xa + xb * r + x1,\n    y: ya + yb * r + y1,\n    r: r\n  };\n}\n\nfunction place(a, b, c) {\n  var ax = a.x,\n      ay = a.y,\n      da = b.r + c.r,\n      db = a.r + c.r,\n      dx = b.x - ax,\n      dy = b.y - ay,\n      dc = dx * dx + dy * dy;\n  if (dc) {\n    var x = 0.5 + ((db *= db) - (da *= da)) / (2 * dc),\n        y = Math.sqrt(Math.max(0, 2 * da * (db + dc) - (db -= dc) * db - da * da)) / (2 * dc);\n    c.x = ax + x * dx + y * dy;\n    c.y = ay + x * dy - y * dx;\n  } else {\n    c.x = ax + db;\n    c.y = ay;\n  }\n}\n\nfunction intersects(a, b) {\n  var dx = b.x - a.x,\n      dy = b.y - a.y,\n      dr = a.r + b.r;\n  return dr * dr - 1e-6 > dx * dx + dy * dy;\n}\n\nfunction distance2(node, x, y) {\n  var a = node._,\n      b = node.next._,\n      ab = a.r + b.r,\n      dx = (a.x * b.r + b.x * a.r) / ab - x,\n      dy = (a.y * b.r + b.y * a.r) / ab - y;\n  return dx * dx + dy * dy;\n}\n\nfunction Node$1(circle) {\n  this._ = circle;\n  this.next = null;\n  this.previous = null;\n}\n\nfunction packEnclose(circles) {\n  if (!(n = circles.length)) return 0;\n\n  var a, b, c, n;\n\n  // Place the first circle.\n  a = circles[0], a.x = 0, a.y = 0;\n  if (!(n > 1)) return a.r;\n\n  // Place the second circle.\n  b = circles[1], a.x = -b.r, b.x = a.r, b.y = 0;\n  if (!(n > 2)) return a.r + b.r;\n\n  // Place the third circle.\n  place(b, a, c = circles[2]);\n\n  // Initialize the weighted centroid.\n  var aa = a.r * a.r,\n      ba = b.r * b.r,\n      ca = c.r * c.r,\n      oa = aa + ba + ca,\n      ox = aa * a.x + ba * b.x + ca * c.x,\n      oy = aa * a.y + ba * b.y + ca * c.y,\n      cx, cy, i, j, k, sj, sk;\n\n  // Initialize the front-chain using the first three circles a, b and c.\n  a = new Node$1(a), b = new Node$1(b), c = new Node$1(c);\n  a.next = c.previous = b;\n  b.next = a.previous = c;\n  c.next = b.previous = a;\n\n  // Attempt to place each remaining circle…\n  pack: for (i = 3; i < n; ++i) {\n    place(a._, b._, c = circles[i]), c = new Node$1(c);\n\n    // Find the closest intersecting circle on the front-chain, if any.\n    // “Closeness” is determined by linear distance along the front-chain.\n    // “Ahead” or “behind” is likewise determined by linear distance.\n    j = b.next, k = a.previous, sj = b._.r, sk = a._.r;\n    do {\n      if (sj <= sk) {\n        if (intersects(j._, c._)) {\n          b = j, a.next = b, b.previous = a, --i;\n          continue pack;\n        }\n        sj += j._.r, j = j.next;\n      } else {\n        if (intersects(k._, c._)) {\n          a = k, a.next = b, b.previous = a, --i;\n          continue pack;\n        }\n        sk += k._.r, k = k.previous;\n      }\n    } while (j !== k.next);\n\n    // Success! Insert the new circle c between a and b.\n    c.previous = a, c.next = b, a.next = b.previous = b = c;\n\n    // Update the weighted centroid.\n    oa += ca = c._.r * c._.r;\n    ox += ca * c._.x;\n    oy += ca * c._.y;\n\n    // Compute the new closest circle pair to the centroid.\n    aa = distance2(a, cx = ox / oa, cy = oy / oa);\n    while ((c = c.next) !== b) {\n      if ((ca = distance2(c, cx, cy)) < aa) {\n        a = c, aa = ca;\n      }\n    }\n    b = a.next;\n  }\n\n  // Compute the enclosing circle of the front chain.\n  a = [b._], c = b; while ((c = c.next) !== b) a.push(c._); c = enclose(a);\n\n  // Translate the circles to put the enclosing circle around the origin.\n  for (i = 0; i < n; ++i) a = circles[i], a.x -= c.x, a.y -= c.y;\n\n  return c.r;\n}\n\nvar siblings = function(circles) {\n  packEnclose(circles);\n  return circles;\n};\n\nfunction optional(f) {\n  return f == null ? null : required(f);\n}\n\nfunction required(f) {\n  if (typeof f !== \"function\") throw new Error;\n  return f;\n}\n\nfunction constantZero() {\n  return 0;\n}\n\nvar constant$8 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nfunction defaultRadius$1(d) {\n  return Math.sqrt(d.value);\n}\n\nvar index$2 = function() {\n  var radius = null,\n      dx = 1,\n      dy = 1,\n      padding = constantZero;\n\n  function pack(root) {\n    root.x = dx / 2, root.y = dy / 2;\n    if (radius) {\n      root.eachBefore(radiusLeaf(radius))\n          .eachAfter(packChildren(padding, 0.5))\n          .eachBefore(translateChild(1));\n    } else {\n      root.eachBefore(radiusLeaf(defaultRadius$1))\n          .eachAfter(packChildren(constantZero, 1))\n          .eachAfter(packChildren(padding, root.r / Math.min(dx, dy)))\n          .eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r)));\n    }\n    return root;\n  }\n\n  pack.radius = function(x) {\n    return arguments.length ? (radius = optional(x), pack) : radius;\n  };\n\n  pack.size = function(x) {\n    return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];\n  };\n\n  pack.padding = function(x) {\n    return arguments.length ? (padding = typeof x === \"function\" ? x : constant$8(+x), pack) : padding;\n  };\n\n  return pack;\n};\n\nfunction radiusLeaf(radius) {\n  return function(node) {\n    if (!node.children) {\n      node.r = Math.max(0, +radius(node) || 0);\n    }\n  };\n}\n\nfunction packChildren(padding, k) {\n  return function(node) {\n    if (children = node.children) {\n      var children,\n          i,\n          n = children.length,\n          r = padding(node) * k || 0,\n          e;\n\n      if (r) for (i = 0; i < n; ++i) children[i].r += r;\n      e = packEnclose(children);\n      if (r) for (i = 0; i < n; ++i) children[i].r -= r;\n      node.r = e + r;\n    }\n  };\n}\n\nfunction translateChild(k) {\n  return function(node) {\n    var parent = node.parent;\n    node.r *= k;\n    if (parent) {\n      node.x = parent.x + k * node.x;\n      node.y = parent.y + k * node.y;\n    }\n  };\n}\n\nvar roundNode = function(node) {\n  node.x0 = Math.round(node.x0);\n  node.y0 = Math.round(node.y0);\n  node.x1 = Math.round(node.x1);\n  node.y1 = Math.round(node.y1);\n};\n\nvar treemapDice = function(parent, x0, y0, x1, y1) {\n  var nodes = parent.children,\n      node,\n      i = -1,\n      n = nodes.length,\n      k = parent.value && (x1 - x0) / parent.value;\n\n  while (++i < n) {\n    node = nodes[i], node.y0 = y0, node.y1 = y1;\n    node.x0 = x0, node.x1 = x0 += node.value * k;\n  }\n};\n\nvar partition = function() {\n  var dx = 1,\n      dy = 1,\n      padding = 0,\n      round = false;\n\n  function partition(root) {\n    var n = root.height + 1;\n    root.x0 =\n    root.y0 = padding;\n    root.x1 = dx;\n    root.y1 = dy / n;\n    root.eachBefore(positionNode(dy, n));\n    if (round) root.eachBefore(roundNode);\n    return root;\n  }\n\n  function positionNode(dy, n) {\n    return function(node) {\n      if (node.children) {\n        treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);\n      }\n      var x0 = node.x0,\n          y0 = node.y0,\n          x1 = node.x1 - padding,\n          y1 = node.y1 - padding;\n      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;\n      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;\n      node.x0 = x0;\n      node.y0 = y0;\n      node.x1 = x1;\n      node.y1 = y1;\n    };\n  }\n\n  partition.round = function(x) {\n    return arguments.length ? (round = !!x, partition) : round;\n  };\n\n  partition.size = function(x) {\n    return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];\n  };\n\n  partition.padding = function(x) {\n    return arguments.length ? (padding = +x, partition) : padding;\n  };\n\n  return partition;\n};\n\nvar keyPrefix$1 = \"$\";\nvar preroot = {depth: -1};\nvar ambiguous = {};\n\nfunction defaultId(d) {\n  return d.id;\n}\n\nfunction defaultParentId(d) {\n  return d.parentId;\n}\n\nvar stratify = function() {\n  var id = defaultId,\n      parentId = defaultParentId;\n\n  function stratify(data) {\n    var d,\n        i,\n        n = data.length,\n        root,\n        parent,\n        node,\n        nodes = new Array(n),\n        nodeId,\n        nodeKey,\n        nodeByKey = {};\n\n    for (i = 0; i < n; ++i) {\n      d = data[i], node = nodes[i] = new Node(d);\n      if ((nodeId = id(d, i, data)) != null && (nodeId += \"\")) {\n        nodeKey = keyPrefix$1 + (node.id = nodeId);\n        nodeByKey[nodeKey] = nodeKey in nodeByKey ? ambiguous : node;\n      }\n    }\n\n    for (i = 0; i < n; ++i) {\n      node = nodes[i], nodeId = parentId(data[i], i, data);\n      if (nodeId == null || !(nodeId += \"\")) {\n        if (root) throw new Error(\"multiple roots\");\n        root = node;\n      } else {\n        parent = nodeByKey[keyPrefix$1 + nodeId];\n        if (!parent) throw new Error(\"missing: \" + nodeId);\n        if (parent === ambiguous) throw new Error(\"ambiguous: \" + nodeId);\n        if (parent.children) parent.children.push(node);\n        else parent.children = [node];\n        node.parent = parent;\n      }\n    }\n\n    if (!root) throw new Error(\"no root\");\n    root.parent = preroot;\n    root.eachBefore(function(node) { node.depth = node.parent.depth + 1; --n; }).eachBefore(computeHeight);\n    root.parent = null;\n    if (n > 0) throw new Error(\"cycle\");\n\n    return root;\n  }\n\n  stratify.id = function(x) {\n    return arguments.length ? (id = required(x), stratify) : id;\n  };\n\n  stratify.parentId = function(x) {\n    return arguments.length ? (parentId = required(x), stratify) : parentId;\n  };\n\n  return stratify;\n};\n\nfunction defaultSeparation$1(a, b) {\n  return a.parent === b.parent ? 1 : 2;\n}\n\n// function radialSeparation(a, b) {\n//   return (a.parent === b.parent ? 1 : 2) / a.depth;\n// }\n\n// This function is used to traverse the left contour of a subtree (or\n// subforest). It returns the successor of v on this contour. This successor is\n// either given by the leftmost child of v or by the thread of v. The function\n// returns null if and only if v is on the highest level of its subtree.\nfunction nextLeft(v) {\n  var children = v.children;\n  return children ? children[0] : v.t;\n}\n\n// This function works analogously to nextLeft.\nfunction nextRight(v) {\n  var children = v.children;\n  return children ? children[children.length - 1] : v.t;\n}\n\n// Shifts the current subtree rooted at w+. This is done by increasing\n// prelim(w+) and mod(w+) by shift.\nfunction moveSubtree(wm, wp, shift) {\n  var change = shift / (wp.i - wm.i);\n  wp.c -= change;\n  wp.s += shift;\n  wm.c += change;\n  wp.z += shift;\n  wp.m += shift;\n}\n\n// All other shifts, applied to the smaller subtrees between w- and w+, are\n// performed by this function. To prepare the shifts, we have to adjust\n// change(w+), shift(w+), and change(w-).\nfunction executeShifts(v) {\n  var shift = 0,\n      change = 0,\n      children = v.children,\n      i = children.length,\n      w;\n  while (--i >= 0) {\n    w = children[i];\n    w.z += shift;\n    w.m += shift;\n    shift += w.s + (change += w.c);\n  }\n}\n\n// If vi-’s ancestor is a sibling of v, returns vi-’s ancestor. Otherwise,\n// returns the specified (default) ancestor.\nfunction nextAncestor(vim, v, ancestor) {\n  return vim.a.parent === v.parent ? vim.a : ancestor;\n}\n\nfunction TreeNode(node, i) {\n  this._ = node;\n  this.parent = null;\n  this.children = null;\n  this.A = null; // default ancestor\n  this.a = this; // ancestor\n  this.z = 0; // prelim\n  this.m = 0; // mod\n  this.c = 0; // change\n  this.s = 0; // shift\n  this.t = null; // thread\n  this.i = i; // number\n}\n\nTreeNode.prototype = Object.create(Node.prototype);\n\nfunction treeRoot(root) {\n  var tree = new TreeNode(root, 0),\n      node,\n      nodes = [tree],\n      child,\n      children,\n      i,\n      n;\n\n  while (node = nodes.pop()) {\n    if (children = node._.children) {\n      node.children = new Array(n = children.length);\n      for (i = n - 1; i >= 0; --i) {\n        nodes.push(child = node.children[i] = new TreeNode(children[i], i));\n        child.parent = node;\n      }\n    }\n  }\n\n  (tree.parent = new TreeNode(null, 0)).children = [tree];\n  return tree;\n}\n\n// Node-link tree diagram using the Reingold-Tilford \"tidy\" algorithm\nvar tree = function() {\n  var separation = defaultSeparation$1,\n      dx = 1,\n      dy = 1,\n      nodeSize = null;\n\n  function tree(root) {\n    var t = treeRoot(root);\n\n    // Compute the layout using Buchheim et al.’s algorithm.\n    t.eachAfter(firstWalk), t.parent.m = -t.z;\n    t.eachBefore(secondWalk);\n\n    // If a fixed node size is specified, scale x and y.\n    if (nodeSize) root.eachBefore(sizeNode);\n\n    // If a fixed tree size is specified, scale x and y based on the extent.\n    // Compute the left-most, right-most, and depth-most nodes for extents.\n    else {\n      var left = root,\n          right = root,\n          bottom = root;\n      root.eachBefore(function(node) {\n        if (node.x < left.x) left = node;\n        if (node.x > right.x) right = node;\n        if (node.depth > bottom.depth) bottom = node;\n      });\n      var s = left === right ? 1 : separation(left, right) / 2,\n          tx = s - left.x,\n          kx = dx / (right.x + s + tx),\n          ky = dy / (bottom.depth || 1);\n      root.eachBefore(function(node) {\n        node.x = (node.x + tx) * kx;\n        node.y = node.depth * ky;\n      });\n    }\n\n    return root;\n  }\n\n  // Computes a preliminary x-coordinate for v. Before that, FIRST WALK is\n  // applied recursively to the children of v, as well as the function\n  // APPORTION. After spacing out the children by calling EXECUTE SHIFTS, the\n  // node v is placed to the midpoint of its outermost children.\n  function firstWalk(v) {\n    var children = v.children,\n        siblings = v.parent.children,\n        w = v.i ? siblings[v.i - 1] : null;\n    if (children) {\n      executeShifts(v);\n      var midpoint = (children[0].z + children[children.length - 1].z) / 2;\n      if (w) {\n        v.z = w.z + separation(v._, w._);\n        v.m = v.z - midpoint;\n      } else {\n        v.z = midpoint;\n      }\n    } else if (w) {\n      v.z = w.z + separation(v._, w._);\n    }\n    v.parent.A = apportion(v, w, v.parent.A || siblings[0]);\n  }\n\n  // Computes all real x-coordinates by summing up the modifiers recursively.\n  function secondWalk(v) {\n    v._.x = v.z + v.parent.m;\n    v.m += v.parent.m;\n  }\n\n  // The core of the algorithm. Here, a new subtree is combined with the\n  // previous subtrees. Threads are used to traverse the inside and outside\n  // contours of the left and right subtree up to the highest common level. The\n  // vertices used for the traversals are vi+, vi-, vo-, and vo+, where the\n  // superscript o means outside and i means inside, the subscript - means left\n  // subtree and + means right subtree. For summing up the modifiers along the\n  // contour, we use respective variables si+, si-, so-, and so+. Whenever two\n  // nodes of the inside contours conflict, we compute the left one of the\n  // greatest uncommon ancestors using the function ANCESTOR and call MOVE\n  // SUBTREE to shift the subtree and prepare the shifts of smaller subtrees.\n  // Finally, we add a new thread (if necessary).\n  function apportion(v, w, ancestor) {\n    if (w) {\n      var vip = v,\n          vop = v,\n          vim = w,\n          vom = vip.parent.children[0],\n          sip = vip.m,\n          sop = vop.m,\n          sim = vim.m,\n          som = vom.m,\n          shift;\n      while (vim = nextRight(vim), vip = nextLeft(vip), vim && vip) {\n        vom = nextLeft(vom);\n        vop = nextRight(vop);\n        vop.a = v;\n        shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);\n        if (shift > 0) {\n          moveSubtree(nextAncestor(vim, v, ancestor), v, shift);\n          sip += shift;\n          sop += shift;\n        }\n        sim += vim.m;\n        sip += vip.m;\n        som += vom.m;\n        sop += vop.m;\n      }\n      if (vim && !nextRight(vop)) {\n        vop.t = vim;\n        vop.m += sim - sop;\n      }\n      if (vip && !nextLeft(vom)) {\n        vom.t = vip;\n        vom.m += sip - som;\n        ancestor = v;\n      }\n    }\n    return ancestor;\n  }\n\n  function sizeNode(node) {\n    node.x *= dx;\n    node.y = node.depth * dy;\n  }\n\n  tree.separation = function(x) {\n    return arguments.length ? (separation = x, tree) : separation;\n  };\n\n  tree.size = function(x) {\n    return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], tree) : (nodeSize ? null : [dx, dy]);\n  };\n\n  tree.nodeSize = function(x) {\n    return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], tree) : (nodeSize ? [dx, dy] : null);\n  };\n\n  return tree;\n};\n\nvar treemapSlice = function(parent, x0, y0, x1, y1) {\n  var nodes = parent.children,\n      node,\n      i = -1,\n      n = nodes.length,\n      k = parent.value && (y1 - y0) / parent.value;\n\n  while (++i < n) {\n    node = nodes[i], node.x0 = x0, node.x1 = x1;\n    node.y0 = y0, node.y1 = y0 += node.value * k;\n  }\n};\n\nvar phi = (1 + Math.sqrt(5)) / 2;\n\nfunction squarifyRatio(ratio, parent, x0, y0, x1, y1) {\n  var rows = [],\n      nodes = parent.children,\n      row,\n      nodeValue,\n      i0 = 0,\n      i1 = 0,\n      n = nodes.length,\n      dx, dy,\n      value = parent.value,\n      sumValue,\n      minValue,\n      maxValue,\n      newRatio,\n      minRatio,\n      alpha,\n      beta;\n\n  while (i0 < n) {\n    dx = x1 - x0, dy = y1 - y0;\n\n    // Find the next non-empty node.\n    do sumValue = nodes[i1++].value; while (!sumValue && i1 < n);\n    minValue = maxValue = sumValue;\n    alpha = Math.max(dy / dx, dx / dy) / (value * ratio);\n    beta = sumValue * sumValue * alpha;\n    minRatio = Math.max(maxValue / beta, beta / minValue);\n\n    // Keep adding nodes while the aspect ratio maintains or improves.\n    for (; i1 < n; ++i1) {\n      sumValue += nodeValue = nodes[i1].value;\n      if (nodeValue < minValue) minValue = nodeValue;\n      if (nodeValue > maxValue) maxValue = nodeValue;\n      beta = sumValue * sumValue * alpha;\n      newRatio = Math.max(maxValue / beta, beta / minValue);\n      if (newRatio > minRatio) { sumValue -= nodeValue; break; }\n      minRatio = newRatio;\n    }\n\n    // Position and record the row orientation.\n    rows.push(row = {value: sumValue, dice: dx < dy, children: nodes.slice(i0, i1)});\n    if (row.dice) treemapDice(row, x0, y0, x1, value ? y0 += dy * sumValue / value : y1);\n    else treemapSlice(row, x0, y0, value ? x0 += dx * sumValue / value : x1, y1);\n    value -= sumValue, i0 = i1;\n  }\n\n  return rows;\n}\n\nvar squarify = ((function custom(ratio) {\n\n  function squarify(parent, x0, y0, x1, y1) {\n    squarifyRatio(ratio, parent, x0, y0, x1, y1);\n  }\n\n  squarify.ratio = function(x) {\n    return custom((x = +x) > 1 ? x : 1);\n  };\n\n  return squarify;\n}))(phi);\n\nvar index$3 = function() {\n  var tile = squarify,\n      round = false,\n      dx = 1,\n      dy = 1,\n      paddingStack = [0],\n      paddingInner = constantZero,\n      paddingTop = constantZero,\n      paddingRight = constantZero,\n      paddingBottom = constantZero,\n      paddingLeft = constantZero;\n\n  function treemap(root) {\n    root.x0 =\n    root.y0 = 0;\n    root.x1 = dx;\n    root.y1 = dy;\n    root.eachBefore(positionNode);\n    paddingStack = [0];\n    if (round) root.eachBefore(roundNode);\n    return root;\n  }\n\n  function positionNode(node) {\n    var p = paddingStack[node.depth],\n        x0 = node.x0 + p,\n        y0 = node.y0 + p,\n        x1 = node.x1 - p,\n        y1 = node.y1 - p;\n    if (x1 < x0) x0 = x1 = (x0 + x1) / 2;\n    if (y1 < y0) y0 = y1 = (y0 + y1) / 2;\n    node.x0 = x0;\n    node.y0 = y0;\n    node.x1 = x1;\n    node.y1 = y1;\n    if (node.children) {\n      p = paddingStack[node.depth + 1] = paddingInner(node) / 2;\n      x0 += paddingLeft(node) - p;\n      y0 += paddingTop(node) - p;\n      x1 -= paddingRight(node) - p;\n      y1 -= paddingBottom(node) - p;\n      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;\n      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;\n      tile(node, x0, y0, x1, y1);\n    }\n  }\n\n  treemap.round = function(x) {\n    return arguments.length ? (round = !!x, treemap) : round;\n  };\n\n  treemap.size = function(x) {\n    return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy];\n  };\n\n  treemap.tile = function(x) {\n    return arguments.length ? (tile = required(x), treemap) : tile;\n  };\n\n  treemap.padding = function(x) {\n    return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner();\n  };\n\n  treemap.paddingInner = function(x) {\n    return arguments.length ? (paddingInner = typeof x === \"function\" ? x : constant$8(+x), treemap) : paddingInner;\n  };\n\n  treemap.paddingOuter = function(x) {\n    return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop();\n  };\n\n  treemap.paddingTop = function(x) {\n    return arguments.length ? (paddingTop = typeof x === \"function\" ? x : constant$8(+x), treemap) : paddingTop;\n  };\n\n  treemap.paddingRight = function(x) {\n    return arguments.length ? (paddingRight = typeof x === \"function\" ? x : constant$8(+x), treemap) : paddingRight;\n  };\n\n  treemap.paddingBottom = function(x) {\n    return arguments.length ? (paddingBottom = typeof x === \"function\" ? x : constant$8(+x), treemap) : paddingBottom;\n  };\n\n  treemap.paddingLeft = function(x) {\n    return arguments.length ? (paddingLeft = typeof x === \"function\" ? x : constant$8(+x), treemap) : paddingLeft;\n  };\n\n  return treemap;\n};\n\nvar binary = function(parent, x0, y0, x1, y1) {\n  var nodes = parent.children,\n      i, n = nodes.length,\n      sum, sums = new Array(n + 1);\n\n  for (sums[0] = sum = i = 0; i < n; ++i) {\n    sums[i + 1] = sum += nodes[i].value;\n  }\n\n  partition(0, n, parent.value, x0, y0, x1, y1);\n\n  function partition(i, j, value, x0, y0, x1, y1) {\n    if (i >= j - 1) {\n      var node = nodes[i];\n      node.x0 = x0, node.y0 = y0;\n      node.x1 = x1, node.y1 = y1;\n      return;\n    }\n\n    var valueOffset = sums[i],\n        valueTarget = (value / 2) + valueOffset,\n        k = i + 1,\n        hi = j - 1;\n\n    while (k < hi) {\n      var mid = k + hi >>> 1;\n      if (sums[mid] < valueTarget) k = mid + 1;\n      else hi = mid;\n    }\n\n    if ((valueTarget - sums[k - 1]) < (sums[k] - valueTarget) && i + 1 < k) --k;\n\n    var valueLeft = sums[k] - valueOffset,\n        valueRight = value - valueLeft;\n\n    if ((x1 - x0) > (y1 - y0)) {\n      var xk = (x0 * valueRight + x1 * valueLeft) / value;\n      partition(i, k, valueLeft, x0, y0, xk, y1);\n      partition(k, j, valueRight, xk, y0, x1, y1);\n    } else {\n      var yk = (y0 * valueRight + y1 * valueLeft) / value;\n      partition(i, k, valueLeft, x0, y0, x1, yk);\n      partition(k, j, valueRight, x0, yk, x1, y1);\n    }\n  }\n};\n\nvar sliceDice = function(parent, x0, y0, x1, y1) {\n  (parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1);\n};\n\nvar resquarify = ((function custom(ratio) {\n\n  function resquarify(parent, x0, y0, x1, y1) {\n    if ((rows = parent._squarify) && (rows.ratio === ratio)) {\n      var rows,\n          row,\n          nodes,\n          i,\n          j = -1,\n          n,\n          m = rows.length,\n          value = parent.value;\n\n      while (++j < m) {\n        row = rows[j], nodes = row.children;\n        for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value;\n        if (row.dice) treemapDice(row, x0, y0, x1, y0 += (y1 - y0) * row.value / value);\n        else treemapSlice(row, x0, y0, x0 += (x1 - x0) * row.value / value, y1);\n        value -= row.value;\n      }\n    } else {\n      parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1);\n      rows.ratio = ratio;\n    }\n  }\n\n  resquarify.ratio = function(x) {\n    return custom((x = +x) > 1 ? x : 1);\n  };\n\n  return resquarify;\n}))(phi);\n\nvar area$1 = function(polygon) {\n  var i = -1,\n      n = polygon.length,\n      a,\n      b = polygon[n - 1],\n      area = 0;\n\n  while (++i < n) {\n    a = b;\n    b = polygon[i];\n    area += a[1] * b[0] - a[0] * b[1];\n  }\n\n  return area / 2;\n};\n\nvar centroid$1 = function(polygon) {\n  var i = -1,\n      n = polygon.length,\n      x = 0,\n      y = 0,\n      a,\n      b = polygon[n - 1],\n      c,\n      k = 0;\n\n  while (++i < n) {\n    a = b;\n    b = polygon[i];\n    k += c = a[0] * b[1] - b[0] * a[1];\n    x += (a[0] + b[0]) * c;\n    y += (a[1] + b[1]) * c;\n  }\n\n  return k *= 3, [x / k, y / k];\n};\n\n// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of\n// the 3D cross product in a quadrant I Cartesian coordinate system (+x is\n// right, +y is up). Returns a positive value if ABC is counter-clockwise,\n// negative if clockwise, and zero if the points are collinear.\nvar cross$1 = function(a, b, c) {\n  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);\n};\n\nfunction lexicographicOrder(a, b) {\n  return a[0] - b[0] || a[1] - b[1];\n}\n\n// Computes the upper convex hull per the monotone chain algorithm.\n// Assumes points.length >= 3, is sorted by x, unique in y.\n// Returns an array of indices into points in left-to-right order.\nfunction computeUpperHullIndexes(points) {\n  var n = points.length,\n      indexes = [0, 1],\n      size = 2;\n\n  for (var i = 2; i < n; ++i) {\n    while (size > 1 && cross$1(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size;\n    indexes[size++] = i;\n  }\n\n  return indexes.slice(0, size); // remove popped points\n}\n\nvar hull = function(points) {\n  if ((n = points.length) < 3) return null;\n\n  var i,\n      n,\n      sortedPoints = new Array(n),\n      flippedPoints = new Array(n);\n\n  for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i];\n  sortedPoints.sort(lexicographicOrder);\n  for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];\n\n  var upperIndexes = computeUpperHullIndexes(sortedPoints),\n      lowerIndexes = computeUpperHullIndexes(flippedPoints);\n\n  // Construct the hull polygon, removing possible duplicate endpoints.\n  var skipLeft = lowerIndexes[0] === upperIndexes[0],\n      skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],\n      hull = [];\n\n  // Add upper hull in right-to-l order.\n  // Then add lower hull in left-to-right order.\n  for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]);\n  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]);\n\n  return hull;\n};\n\nvar contains$1 = function(polygon, point) {\n  var n = polygon.length,\n      p = polygon[n - 1],\n      x = point[0], y = point[1],\n      x0 = p[0], y0 = p[1],\n      x1, y1,\n      inside = false;\n\n  for (var i = 0; i < n; ++i) {\n    p = polygon[i], x1 = p[0], y1 = p[1];\n    if (((y1 > y) !== (y0 > y)) && (x < (x0 - x1) * (y - y1) / (y0 - y1) + x1)) inside = !inside;\n    x0 = x1, y0 = y1;\n  }\n\n  return inside;\n};\n\nvar length$2 = function(polygon) {\n  var i = -1,\n      n = polygon.length,\n      b = polygon[n - 1],\n      xa,\n      ya,\n      xb = b[0],\n      yb = b[1],\n      perimeter = 0;\n\n  while (++i < n) {\n    xa = xb;\n    ya = yb;\n    b = polygon[i];\n    xb = b[0];\n    yb = b[1];\n    xa -= xb;\n    ya -= yb;\n    perimeter += Math.sqrt(xa * xa + ya * ya);\n  }\n\n  return perimeter;\n};\n\nvar slice$3 = [].slice;\n\nvar noabort = {};\n\nfunction Queue(size) {\n  if (!(size >= 1)) throw new Error;\n  this._size = size;\n  this._call =\n  this._error = null;\n  this._tasks = [];\n  this._data = [];\n  this._waiting =\n  this._active =\n  this._ended =\n  this._start = 0; // inside a synchronous task callback?\n}\n\nQueue.prototype = queue.prototype = {\n  constructor: Queue,\n  defer: function(callback) {\n    if (typeof callback !== \"function\" || this._call) throw new Error;\n    if (this._error != null) return this;\n    var t = slice$3.call(arguments, 1);\n    t.push(callback);\n    ++this._waiting, this._tasks.push(t);\n    poke$1(this);\n    return this;\n  },\n  abort: function() {\n    if (this._error == null) abort(this, new Error(\"abort\"));\n    return this;\n  },\n  await: function(callback) {\n    if (typeof callback !== \"function\" || this._call) throw new Error;\n    this._call = function(error, results) { callback.apply(null, [error].concat(results)); };\n    maybeNotify(this);\n    return this;\n  },\n  awaitAll: function(callback) {\n    if (typeof callback !== \"function\" || this._call) throw new Error;\n    this._call = callback;\n    maybeNotify(this);\n    return this;\n  }\n};\n\nfunction poke$1(q) {\n  if (!q._start) {\n    try { start$1(q); } // let the current task complete\n    catch (e) {\n      if (q._tasks[q._ended + q._active - 1]) abort(q, e); // task errored synchronously\n      else if (!q._data) throw e; // await callback errored synchronously\n    }\n  }\n}\n\nfunction start$1(q) {\n  while (q._start = q._waiting && q._active < q._size) {\n    var i = q._ended + q._active,\n        t = q._tasks[i],\n        j = t.length - 1,\n        c = t[j];\n    t[j] = end(q, i);\n    --q._waiting, ++q._active;\n    t = c.apply(null, t);\n    if (!q._tasks[i]) continue; // task finished synchronously\n    q._tasks[i] = t || noabort;\n  }\n}\n\nfunction end(q, i) {\n  return function(e, r) {\n    if (!q._tasks[i]) return; // ignore multiple callbacks\n    --q._active, ++q._ended;\n    q._tasks[i] = null;\n    if (q._error != null) return; // ignore secondary errors\n    if (e != null) {\n      abort(q, e);\n    } else {\n      q._data[i] = r;\n      if (q._waiting) poke$1(q);\n      else maybeNotify(q);\n    }\n  };\n}\n\nfunction abort(q, e) {\n  var i = q._tasks.length, t;\n  q._error = e; // ignore active callbacks\n  q._data = undefined; // allow gc\n  q._waiting = NaN; // prevent starting\n\n  while (--i >= 0) {\n    if (t = q._tasks[i]) {\n      q._tasks[i] = null;\n      if (t.abort) {\n        try { t.abort(); }\n        catch (e) { /* ignore */ }\n      }\n    }\n  }\n\n  q._active = NaN; // allow notification\n  maybeNotify(q);\n}\n\nfunction maybeNotify(q) {\n  if (!q._active && q._call) {\n    var d = q._data;\n    q._data = undefined; // allow gc\n    q._call(q._error, d);\n  }\n}\n\nfunction queue(concurrency) {\n  return new Queue(arguments.length ? +concurrency : Infinity);\n}\n\nvar uniform = function(min, max) {\n  min = min == null ? 0 : +min;\n  max = max == null ? 1 : +max;\n  if (arguments.length === 1) max = min, min = 0;\n  else max -= min;\n  return function() {\n    return Math.random() * max + min;\n  };\n};\n\nvar normal = function(mu, sigma) {\n  var x, r;\n  mu = mu == null ? 0 : +mu;\n  sigma = sigma == null ? 1 : +sigma;\n  return function() {\n    var y;\n\n    // If available, use the second previously-generated uniform random.\n    if (x != null) y = x, x = null;\n\n    // Otherwise, generate a new x and y.\n    else do {\n      x = Math.random() * 2 - 1;\n      y = Math.random() * 2 - 1;\n      r = x * x + y * y;\n    } while (!r || r > 1);\n\n    return mu + sigma * y * Math.sqrt(-2 * Math.log(r) / r);\n  };\n};\n\nvar logNormal = function() {\n  var randomNormal = normal.apply(this, arguments);\n  return function() {\n    return Math.exp(randomNormal());\n  };\n};\n\nvar irwinHall = function(n) {\n  return function() {\n    for (var sum = 0, i = 0; i < n; ++i) sum += Math.random();\n    return sum;\n  };\n};\n\nvar bates = function(n) {\n  var randomIrwinHall = irwinHall(n);\n  return function() {\n    return randomIrwinHall() / n;\n  };\n};\n\nvar exponential$1 = function(lambda) {\n  return function() {\n    return -Math.log(1 - Math.random()) / lambda;\n  };\n};\n\nvar request = function(url, callback) {\n  var request,\n      event = dispatch(\"beforesend\", \"progress\", \"load\", \"error\"),\n      mimeType,\n      headers = map$1(),\n      xhr = new XMLHttpRequest,\n      user = null,\n      password = null,\n      response,\n      responseType,\n      timeout = 0;\n\n  // If IE does not support CORS, use XDomainRequest.\n  if (typeof XDomainRequest !== \"undefined\"\n      && !(\"withCredentials\" in xhr)\n      && /^(http(s)?:)?\\/\\//.test(url)) xhr = new XDomainRequest;\n\n  \"onload\" in xhr\n      ? xhr.onload = xhr.onerror = xhr.ontimeout = respond\n      : xhr.onreadystatechange = function(o) { xhr.readyState > 3 && respond(o); };\n\n  function respond(o) {\n    var status = xhr.status, result;\n    if (!status && hasResponse(xhr)\n        || status >= 200 && status < 300\n        || status === 304) {\n      if (response) {\n        try {\n          result = response.call(request, xhr);\n        } catch (e) {\n          event.call(\"error\", request, e);\n          return;\n        }\n      } else {\n        result = xhr;\n      }\n      event.call(\"load\", request, result);\n    } else {\n      event.call(\"error\", request, o);\n    }\n  }\n\n  xhr.onprogress = function(e) {\n    event.call(\"progress\", request, e);\n  };\n\n  request = {\n    header: function(name, value) {\n      name = (name + \"\").toLowerCase();\n      if (arguments.length < 2) return headers.get(name);\n      if (value == null) headers.remove(name);\n      else headers.set(name, value + \"\");\n      return request;\n    },\n\n    // If mimeType is non-null and no Accept header is set, a default is used.\n    mimeType: function(value) {\n      if (!arguments.length) return mimeType;\n      mimeType = value == null ? null : value + \"\";\n      return request;\n    },\n\n    // Specifies what type the response value should take;\n    // for instance, arraybuffer, blob, document, or text.\n    responseType: function(value) {\n      if (!arguments.length) return responseType;\n      responseType = value;\n      return request;\n    },\n\n    timeout: function(value) {\n      if (!arguments.length) return timeout;\n      timeout = +value;\n      return request;\n    },\n\n    user: function(value) {\n      return arguments.length < 1 ? user : (user = value == null ? null : value + \"\", request);\n    },\n\n    password: function(value) {\n      return arguments.length < 1 ? password : (password = value == null ? null : value + \"\", request);\n    },\n\n    // Specify how to convert the response content to a specific type;\n    // changes the callback value on \"load\" events.\n    response: function(value) {\n      response = value;\n      return request;\n    },\n\n    // Alias for send(\"GET\", …).\n    get: function(data, callback) {\n      return request.send(\"GET\", data, callback);\n    },\n\n    // Alias for send(\"POST\", …).\n    post: function(data, callback) {\n      return request.send(\"POST\", data, callback);\n    },\n\n    // If callback is non-null, it will be used for error and load events.\n    send: function(method, data, callback) {\n      xhr.open(method, url, true, user, password);\n      if (mimeType != null && !headers.has(\"accept\")) headers.set(\"accept\", mimeType + \",*/*\");\n      if (xhr.setRequestHeader) headers.each(function(value, name) { xhr.setRequestHeader(name, value); });\n      if (mimeType != null && xhr.overrideMimeType) xhr.overrideMimeType(mimeType);\n      if (responseType != null) xhr.responseType = responseType;\n      if (timeout > 0) xhr.timeout = timeout;\n      if (callback == null && typeof data === \"function\") callback = data, data = null;\n      if (callback != null && callback.length === 1) callback = fixCallback(callback);\n      if (callback != null) request.on(\"error\", callback).on(\"load\", function(xhr) { callback(null, xhr); });\n      event.call(\"beforesend\", request, xhr);\n      xhr.send(data == null ? null : data);\n      return request;\n    },\n\n    abort: function() {\n      xhr.abort();\n      return request;\n    },\n\n    on: function() {\n      var value = event.on.apply(event, arguments);\n      return value === event ? request : value;\n    }\n  };\n\n  if (callback != null) {\n    if (typeof callback !== \"function\") throw new Error(\"invalid callback: \" + callback);\n    return request.get(callback);\n  }\n\n  return request;\n};\n\nfunction fixCallback(callback) {\n  return function(error, xhr) {\n    callback(error == null ? xhr : null);\n  };\n}\n\nfunction hasResponse(xhr) {\n  var type = xhr.responseType;\n  return type && type !== \"text\"\n      ? xhr.response // null on error\n      : xhr.responseText; // \"\" on error\n}\n\nvar type$1 = function(defaultMimeType, response) {\n  return function(url, callback) {\n    var r = request(url).mimeType(defaultMimeType).response(response);\n    if (callback != null) {\n      if (typeof callback !== \"function\") throw new Error(\"invalid callback: \" + callback);\n      return r.get(callback);\n    }\n    return r;\n  };\n};\n\nvar html = type$1(\"text/html\", function(xhr) {\n  return document.createRange().createContextualFragment(xhr.responseText);\n});\n\nvar json = type$1(\"application/json\", function(xhr) {\n  return JSON.parse(xhr.responseText);\n});\n\nvar text = type$1(\"text/plain\", function(xhr) {\n  return xhr.responseText;\n});\n\nvar xml = type$1(\"application/xml\", function(xhr) {\n  var xml = xhr.responseXML;\n  if (!xml) throw new Error(\"parse error\");\n  return xml;\n});\n\nvar dsv$1 = function(defaultMimeType, parse) {\n  return function(url, row, callback) {\n    if (arguments.length < 3) callback = row, row = null;\n    var r = request(url).mimeType(defaultMimeType);\n    r.row = function(_) { return arguments.length ? r.response(responseOf(parse, row = _)) : row; };\n    r.row(row);\n    return callback ? r.get(callback) : r;\n  };\n};\n\nfunction responseOf(parse, row) {\n  return function(request$$1) {\n    return parse(request$$1.responseText, row);\n  };\n}\n\nvar csv$1 = dsv$1(\"text/csv\", csvParse);\n\nvar tsv$1 = dsv$1(\"text/tab-separated-values\", tsvParse);\n\nvar array$2 = Array.prototype;\n\nvar map$3 = array$2.map;\nvar slice$4 = array$2.slice;\n\nvar implicit = {name: \"implicit\"};\n\nfunction ordinal(range) {\n  var index = map$1(),\n      domain = [],\n      unknown = implicit;\n\n  range = range == null ? [] : slice$4.call(range);\n\n  function scale(d) {\n    var key = d + \"\", i = index.get(key);\n    if (!i) {\n      if (unknown !== implicit) return unknown;\n      index.set(key, i = domain.push(d));\n    }\n    return range[(i - 1) % range.length];\n  }\n\n  scale.domain = function(_) {\n    if (!arguments.length) return domain.slice();\n    domain = [], index = map$1();\n    var i = -1, n = _.length, d, key;\n    while (++i < n) if (!index.has(key = (d = _[i]) + \"\")) index.set(key, domain.push(d));\n    return scale;\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range = slice$4.call(_), scale) : range.slice();\n  };\n\n  scale.unknown = function(_) {\n    return arguments.length ? (unknown = _, scale) : unknown;\n  };\n\n  scale.copy = function() {\n    return ordinal()\n        .domain(domain)\n        .range(range)\n        .unknown(unknown);\n  };\n\n  return scale;\n}\n\nfunction band() {\n  var scale = ordinal().unknown(undefined),\n      domain = scale.domain,\n      ordinalRange = scale.range,\n      range$$1 = [0, 1],\n      step,\n      bandwidth,\n      round = false,\n      paddingInner = 0,\n      paddingOuter = 0,\n      align = 0.5;\n\n  delete scale.unknown;\n\n  function rescale() {\n    var n = domain().length,\n        reverse = range$$1[1] < range$$1[0],\n        start = range$$1[reverse - 0],\n        stop = range$$1[1 - reverse];\n    step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);\n    if (round) step = Math.floor(step);\n    start += (stop - start - step * (n - paddingInner)) * align;\n    bandwidth = step * (1 - paddingInner);\n    if (round) start = Math.round(start), bandwidth = Math.round(bandwidth);\n    var values = sequence(n).map(function(i) { return start + step * i; });\n    return ordinalRange(reverse ? values.reverse() : values);\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain(_), rescale()) : domain();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range$$1 = [+_[0], +_[1]], rescale()) : range$$1.slice();\n  };\n\n  scale.rangeRound = function(_) {\n    return range$$1 = [+_[0], +_[1]], round = true, rescale();\n  };\n\n  scale.bandwidth = function() {\n    return bandwidth;\n  };\n\n  scale.step = function() {\n    return step;\n  };\n\n  scale.round = function(_) {\n    return arguments.length ? (round = !!_, rescale()) : round;\n  };\n\n  scale.padding = function(_) {\n    return arguments.length ? (paddingInner = paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;\n  };\n\n  scale.paddingInner = function(_) {\n    return arguments.length ? (paddingInner = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;\n  };\n\n  scale.paddingOuter = function(_) {\n    return arguments.length ? (paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingOuter;\n  };\n\n  scale.align = function(_) {\n    return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align;\n  };\n\n  scale.copy = function() {\n    return band()\n        .domain(domain())\n        .range(range$$1)\n        .round(round)\n        .paddingInner(paddingInner)\n        .paddingOuter(paddingOuter)\n        .align(align);\n  };\n\n  return rescale();\n}\n\nfunction pointish(scale) {\n  var copy = scale.copy;\n\n  scale.padding = scale.paddingOuter;\n  delete scale.paddingInner;\n  delete scale.paddingOuter;\n\n  scale.copy = function() {\n    return pointish(copy());\n  };\n\n  return scale;\n}\n\nfunction point$1() {\n  return pointish(band().paddingInner(1));\n}\n\nvar constant$9 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nvar number$1 = function(x) {\n  return +x;\n};\n\nvar unit = [0, 1];\n\nfunction deinterpolateLinear(a, b) {\n  return (b -= (a = +a))\n      ? function(x) { return (x - a) / b; }\n      : constant$9(b);\n}\n\nfunction deinterpolateClamp(deinterpolate) {\n  return function(a, b) {\n    var d = deinterpolate(a = +a, b = +b);\n    return function(x) { return x <= a ? 0 : x >= b ? 1 : d(x); };\n  };\n}\n\nfunction reinterpolateClamp(reinterpolate) {\n  return function(a, b) {\n    var r = reinterpolate(a = +a, b = +b);\n    return function(t) { return t <= 0 ? a : t >= 1 ? b : r(t); };\n  };\n}\n\nfunction bimap(domain, range$$1, deinterpolate, reinterpolate) {\n  var d0 = domain[0], d1 = domain[1], r0 = range$$1[0], r1 = range$$1[1];\n  if (d1 < d0) d0 = deinterpolate(d1, d0), r0 = reinterpolate(r1, r0);\n  else d0 = deinterpolate(d0, d1), r0 = reinterpolate(r0, r1);\n  return function(x) { return r0(d0(x)); };\n}\n\nfunction polymap(domain, range$$1, deinterpolate, reinterpolate) {\n  var j = Math.min(domain.length, range$$1.length) - 1,\n      d = new Array(j),\n      r = new Array(j),\n      i = -1;\n\n  // Reverse descending domains.\n  if (domain[j] < domain[0]) {\n    domain = domain.slice().reverse();\n    range$$1 = range$$1.slice().reverse();\n  }\n\n  while (++i < j) {\n    d[i] = deinterpolate(domain[i], domain[i + 1]);\n    r[i] = reinterpolate(range$$1[i], range$$1[i + 1]);\n  }\n\n  return function(x) {\n    var i = bisectRight(domain, x, 1, j) - 1;\n    return r[i](d[i](x));\n  };\n}\n\nfunction copy(source, target) {\n  return target\n      .domain(source.domain())\n      .range(source.range())\n      .interpolate(source.interpolate())\n      .clamp(source.clamp());\n}\n\n// deinterpolate(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].\n// reinterpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding domain value x in [a,b].\nfunction continuous(deinterpolate, reinterpolate) {\n  var domain = unit,\n      range$$1 = unit,\n      interpolate$$1 = interpolateValue,\n      clamp = false,\n      piecewise,\n      output,\n      input;\n\n  function rescale() {\n    piecewise = Math.min(domain.length, range$$1.length) > 2 ? polymap : bimap;\n    output = input = null;\n    return scale;\n  }\n\n  function scale(x) {\n    return (output || (output = piecewise(domain, range$$1, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x);\n  }\n\n  scale.invert = function(y) {\n    return (input || (input = piecewise(range$$1, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y);\n  };\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain = map$3.call(_, number$1), rescale()) : domain.slice();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range$$1 = slice$4.call(_), rescale()) : range$$1.slice();\n  };\n\n  scale.rangeRound = function(_) {\n    return range$$1 = slice$4.call(_), interpolate$$1 = interpolateRound, rescale();\n  };\n\n  scale.clamp = function(_) {\n    return arguments.length ? (clamp = !!_, rescale()) : clamp;\n  };\n\n  scale.interpolate = function(_) {\n    return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1;\n  };\n\n  return rescale();\n}\n\nvar tickFormat = function(domain, count, specifier) {\n  var start = domain[0],\n      stop = domain[domain.length - 1],\n      step = tickStep(start, stop, count == null ? 10 : count),\n      precision;\n  specifier = formatSpecifier(specifier == null ? \",f\" : specifier);\n  switch (specifier.type) {\n    case \"s\": {\n      var value = Math.max(Math.abs(start), Math.abs(stop));\n      if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;\n      return exports.formatPrefix(specifier, value);\n    }\n    case \"\":\n    case \"e\":\n    case \"g\":\n    case \"p\":\n    case \"r\": {\n      if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === \"e\");\n      break;\n    }\n    case \"f\":\n    case \"%\": {\n      if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === \"%\") * 2;\n      break;\n    }\n  }\n  return exports.format(specifier);\n};\n\nfunction linearish(scale) {\n  var domain = scale.domain;\n\n  scale.ticks = function(count) {\n    var d = domain();\n    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);\n  };\n\n  scale.tickFormat = function(count, specifier) {\n    return tickFormat(domain(), count, specifier);\n  };\n\n  scale.nice = function(count) {\n    var d = domain(),\n        i = d.length - 1,\n        n = count == null ? 10 : count,\n        start = d[0],\n        stop = d[i],\n        step = tickStep(start, stop, n);\n\n    if (step) {\n      step = tickStep(Math.floor(start / step) * step, Math.ceil(stop / step) * step, n);\n      d[0] = Math.floor(start / step) * step;\n      d[i] = Math.ceil(stop / step) * step;\n      domain(d);\n    }\n\n    return scale;\n  };\n\n  return scale;\n}\n\nfunction linear$2() {\n  var scale = continuous(deinterpolateLinear, reinterpolate);\n\n  scale.copy = function() {\n    return copy(scale, linear$2());\n  };\n\n  return linearish(scale);\n}\n\nfunction identity$6() {\n  var domain = [0, 1];\n\n  function scale(x) {\n    return +x;\n  }\n\n  scale.invert = scale;\n\n  scale.domain = scale.range = function(_) {\n    return arguments.length ? (domain = map$3.call(_, number$1), scale) : domain.slice();\n  };\n\n  scale.copy = function() {\n    return identity$6().domain(domain);\n  };\n\n  return linearish(scale);\n}\n\nvar nice = function(domain, interval) {\n  domain = domain.slice();\n\n  var i0 = 0,\n      i1 = domain.length - 1,\n      x0 = domain[i0],\n      x1 = domain[i1],\n      t;\n\n  if (x1 < x0) {\n    t = i0, i0 = i1, i1 = t;\n    t = x0, x0 = x1, x1 = t;\n  }\n\n  domain[i0] = interval.floor(x0);\n  domain[i1] = interval.ceil(x1);\n  return domain;\n};\n\nfunction deinterpolate(a, b) {\n  return (b = Math.log(b / a))\n      ? function(x) { return Math.log(x / a) / b; }\n      : constant$9(b);\n}\n\nfunction reinterpolate$1(a, b) {\n  return a < 0\n      ? function(t) { return -Math.pow(-b, t) * Math.pow(-a, 1 - t); }\n      : function(t) { return Math.pow(b, t) * Math.pow(a, 1 - t); };\n}\n\nfunction pow10(x) {\n  return isFinite(x) ? +(\"1e\" + x) : x < 0 ? 0 : x;\n}\n\nfunction powp(base) {\n  return base === 10 ? pow10\n      : base === Math.E ? Math.exp\n      : function(x) { return Math.pow(base, x); };\n}\n\nfunction logp(base) {\n  return base === Math.E ? Math.log\n      : base === 10 && Math.log10\n      || base === 2 && Math.log2\n      || (base = Math.log(base), function(x) { return Math.log(x) / base; });\n}\n\nfunction reflect(f) {\n  return function(x) {\n    return -f(-x);\n  };\n}\n\nfunction log$1() {\n  var scale = continuous(deinterpolate, reinterpolate$1).domain([1, 10]),\n      domain = scale.domain,\n      base = 10,\n      logs = logp(10),\n      pows = powp(10);\n\n  function rescale() {\n    logs = logp(base), pows = powp(base);\n    if (domain()[0] < 0) logs = reflect(logs), pows = reflect(pows);\n    return scale;\n  }\n\n  scale.base = function(_) {\n    return arguments.length ? (base = +_, rescale()) : base;\n  };\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain(_), rescale()) : domain();\n  };\n\n  scale.ticks = function(count) {\n    var d = domain(),\n        u = d[0],\n        v = d[d.length - 1],\n        r;\n\n    if (r = v < u) i = u, u = v, v = i;\n\n    var i = logs(u),\n        j = logs(v),\n        p,\n        k,\n        t,\n        n = count == null ? 10 : +count,\n        z = [];\n\n    if (!(base % 1) && j - i < n) {\n      i = Math.round(i) - 1, j = Math.round(j) + 1;\n      if (u > 0) for (; i < j; ++i) {\n        for (k = 1, p = pows(i); k < base; ++k) {\n          t = p * k;\n          if (t < u) continue;\n          if (t > v) break;\n          z.push(t);\n        }\n      } else for (; i < j; ++i) {\n        for (k = base - 1, p = pows(i); k >= 1; --k) {\n          t = p * k;\n          if (t < u) continue;\n          if (t > v) break;\n          z.push(t);\n        }\n      }\n    } else {\n      z = ticks(i, j, Math.min(j - i, n)).map(pows);\n    }\n\n    return r ? z.reverse() : z;\n  };\n\n  scale.tickFormat = function(count, specifier) {\n    if (specifier == null) specifier = base === 10 ? \".0e\" : \",\";\n    if (typeof specifier !== \"function\") specifier = exports.format(specifier);\n    if (count === Infinity) return specifier;\n    if (count == null) count = 10;\n    var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?\n    return function(d) {\n      var i = d / pows(Math.round(logs(d)));\n      if (i * base < base - 0.5) i *= base;\n      return i <= k ? specifier(d) : \"\";\n    };\n  };\n\n  scale.nice = function() {\n    return domain(nice(domain(), {\n      floor: function(x) { return pows(Math.floor(logs(x))); },\n      ceil: function(x) { return pows(Math.ceil(logs(x))); }\n    }));\n  };\n\n  scale.copy = function() {\n    return copy(scale, log$1().base(base));\n  };\n\n  return scale;\n}\n\nfunction raise$1(x, exponent) {\n  return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);\n}\n\nfunction pow$1() {\n  var exponent = 1,\n      scale = continuous(deinterpolate, reinterpolate),\n      domain = scale.domain;\n\n  function deinterpolate(a, b) {\n    return (b = raise$1(b, exponent) - (a = raise$1(a, exponent)))\n        ? function(x) { return (raise$1(x, exponent) - a) / b; }\n        : constant$9(b);\n  }\n\n  function reinterpolate(a, b) {\n    b = raise$1(b, exponent) - (a = raise$1(a, exponent));\n    return function(t) { return raise$1(a + b * t, 1 / exponent); };\n  }\n\n  scale.exponent = function(_) {\n    return arguments.length ? (exponent = +_, domain(domain())) : exponent;\n  };\n\n  scale.copy = function() {\n    return copy(scale, pow$1().exponent(exponent));\n  };\n\n  return linearish(scale);\n}\n\nfunction sqrt$1() {\n  return pow$1().exponent(0.5);\n}\n\nfunction quantile$$1() {\n  var domain = [],\n      range$$1 = [],\n      thresholds = [];\n\n  function rescale() {\n    var i = 0, n = Math.max(1, range$$1.length);\n    thresholds = new Array(n - 1);\n    while (++i < n) thresholds[i - 1] = threshold(domain, i / n);\n    return scale;\n  }\n\n  function scale(x) {\n    if (!isNaN(x = +x)) return range$$1[bisectRight(thresholds, x)];\n  }\n\n  scale.invertExtent = function(y) {\n    var i = range$$1.indexOf(y);\n    return i < 0 ? [NaN, NaN] : [\n      i > 0 ? thresholds[i - 1] : domain[0],\n      i < thresholds.length ? thresholds[i] : domain[domain.length - 1]\n    ];\n  };\n\n  scale.domain = function(_) {\n    if (!arguments.length) return domain.slice();\n    domain = [];\n    for (var i = 0, n = _.length, d; i < n; ++i) if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d);\n    domain.sort(ascending);\n    return rescale();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range$$1 = slice$4.call(_), rescale()) : range$$1.slice();\n  };\n\n  scale.quantiles = function() {\n    return thresholds.slice();\n  };\n\n  scale.copy = function() {\n    return quantile$$1()\n        .domain(domain)\n        .range(range$$1);\n  };\n\n  return scale;\n}\n\nfunction quantize$1() {\n  var x0 = 0,\n      x1 = 1,\n      n = 1,\n      domain = [0.5],\n      range$$1 = [0, 1];\n\n  function scale(x) {\n    if (x <= x) return range$$1[bisectRight(domain, x, 0, n)];\n  }\n\n  function rescale() {\n    var i = -1;\n    domain = new Array(n);\n    while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);\n    return scale;\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (n = (range$$1 = slice$4.call(_)).length - 1, rescale()) : range$$1.slice();\n  };\n\n  scale.invertExtent = function(y) {\n    var i = range$$1.indexOf(y);\n    return i < 0 ? [NaN, NaN]\n        : i < 1 ? [x0, domain[0]]\n        : i >= n ? [domain[n - 1], x1]\n        : [domain[i - 1], domain[i]];\n  };\n\n  scale.copy = function() {\n    return quantize$1()\n        .domain([x0, x1])\n        .range(range$$1);\n  };\n\n  return linearish(scale);\n}\n\nfunction threshold$1() {\n  var domain = [0.5],\n      range$$1 = [0, 1],\n      n = 1;\n\n  function scale(x) {\n    if (x <= x) return range$$1[bisectRight(domain, x, 0, n)];\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (domain = slice$4.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : domain.slice();\n  };\n\n  scale.range = function(_) {\n    return arguments.length ? (range$$1 = slice$4.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : range$$1.slice();\n  };\n\n  scale.invertExtent = function(y) {\n    var i = range$$1.indexOf(y);\n    return [domain[i - 1], domain[i]];\n  };\n\n  scale.copy = function() {\n    return threshold$1()\n        .domain(domain)\n        .range(range$$1);\n  };\n\n  return scale;\n}\n\nvar t0$1 = new Date;\nvar t1$1 = new Date;\n\nfunction newInterval(floori, offseti, count, field) {\n\n  function interval(date) {\n    return floori(date = new Date(+date)), date;\n  }\n\n  interval.floor = interval;\n\n  interval.ceil = function(date) {\n    return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;\n  };\n\n  interval.round = function(date) {\n    var d0 = interval(date),\n        d1 = interval.ceil(date);\n    return date - d0 < d1 - date ? d0 : d1;\n  };\n\n  interval.offset = function(date, step) {\n    return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;\n  };\n\n  interval.range = function(start, stop, step) {\n    var range = [];\n    start = interval.ceil(start);\n    step = step == null ? 1 : Math.floor(step);\n    if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date\n    do range.push(new Date(+start)); while (offseti(start, step), floori(start), start < stop)\n    return range;\n  };\n\n  interval.filter = function(test) {\n    return newInterval(function(date) {\n      if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);\n    }, function(date, step) {\n      if (date >= date) while (--step >= 0) while (offseti(date, 1), !test(date)) {} // eslint-disable-line no-empty\n    });\n  };\n\n  if (count) {\n    interval.count = function(start, end) {\n      t0$1.setTime(+start), t1$1.setTime(+end);\n      floori(t0$1), floori(t1$1);\n      return Math.floor(count(t0$1, t1$1));\n    };\n\n    interval.every = function(step) {\n      step = Math.floor(step);\n      return !isFinite(step) || !(step > 0) ? null\n          : !(step > 1) ? interval\n          : interval.filter(field\n              ? function(d) { return field(d) % step === 0; }\n              : function(d) { return interval.count(0, d) % step === 0; });\n    };\n  }\n\n  return interval;\n}\n\nvar millisecond = newInterval(function() {\n  // noop\n}, function(date, step) {\n  date.setTime(+date + step);\n}, function(start, end) {\n  return end - start;\n});\n\n// An optimized implementation for this simple case.\nmillisecond.every = function(k) {\n  k = Math.floor(k);\n  if (!isFinite(k) || !(k > 0)) return null;\n  if (!(k > 1)) return millisecond;\n  return newInterval(function(date) {\n    date.setTime(Math.floor(date / k) * k);\n  }, function(date, step) {\n    date.setTime(+date + step * k);\n  }, function(start, end) {\n    return (end - start) / k;\n  });\n};\n\nvar milliseconds = millisecond.range;\n\nvar durationSecond$1 = 1e3;\nvar durationMinute$1 = 6e4;\nvar durationHour$1 = 36e5;\nvar durationDay$1 = 864e5;\nvar durationWeek$1 = 6048e5;\n\nvar second = newInterval(function(date) {\n  date.setTime(Math.floor(date / durationSecond$1) * durationSecond$1);\n}, function(date, step) {\n  date.setTime(+date + step * durationSecond$1);\n}, function(start, end) {\n  return (end - start) / durationSecond$1;\n}, function(date) {\n  return date.getUTCSeconds();\n});\n\nvar seconds = second.range;\n\nvar minute = newInterval(function(date) {\n  date.setTime(Math.floor(date / durationMinute$1) * durationMinute$1);\n}, function(date, step) {\n  date.setTime(+date + step * durationMinute$1);\n}, function(start, end) {\n  return (end - start) / durationMinute$1;\n}, function(date) {\n  return date.getMinutes();\n});\n\nvar minutes = minute.range;\n\nvar hour = newInterval(function(date) {\n  var offset = date.getTimezoneOffset() * durationMinute$1 % durationHour$1;\n  if (offset < 0) offset += durationHour$1;\n  date.setTime(Math.floor((+date - offset) / durationHour$1) * durationHour$1 + offset);\n}, function(date, step) {\n  date.setTime(+date + step * durationHour$1);\n}, function(start, end) {\n  return (end - start) / durationHour$1;\n}, function(date) {\n  return date.getHours();\n});\n\nvar hours = hour.range;\n\nvar day = newInterval(function(date) {\n  date.setHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setDate(date.getDate() + step);\n}, function(start, end) {\n  return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationDay$1;\n}, function(date) {\n  return date.getDate() - 1;\n});\n\nvar days = day.range;\n\nfunction weekday(i) {\n  return newInterval(function(date) {\n    date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);\n    date.setHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setDate(date.getDate() + step * 7);\n  }, function(start, end) {\n    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationWeek$1;\n  });\n}\n\nvar sunday = weekday(0);\nvar monday = weekday(1);\nvar tuesday = weekday(2);\nvar wednesday = weekday(3);\nvar thursday = weekday(4);\nvar friday = weekday(5);\nvar saturday = weekday(6);\n\nvar sundays = sunday.range;\nvar mondays = monday.range;\nvar tuesdays = tuesday.range;\nvar wednesdays = wednesday.range;\nvar thursdays = thursday.range;\nvar fridays = friday.range;\nvar saturdays = saturday.range;\n\nvar month = newInterval(function(date) {\n  date.setDate(1);\n  date.setHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setMonth(date.getMonth() + step);\n}, function(start, end) {\n  return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;\n}, function(date) {\n  return date.getMonth();\n});\n\nvar months = month.range;\n\nvar year = newInterval(function(date) {\n  date.setMonth(0, 1);\n  date.setHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setFullYear(date.getFullYear() + step);\n}, function(start, end) {\n  return end.getFullYear() - start.getFullYear();\n}, function(date) {\n  return date.getFullYear();\n});\n\n// An optimized implementation for this simple case.\nyear.every = function(k) {\n  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {\n    date.setFullYear(Math.floor(date.getFullYear() / k) * k);\n    date.setMonth(0, 1);\n    date.setHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setFullYear(date.getFullYear() + step * k);\n  });\n};\n\nvar years = year.range;\n\nvar utcMinute = newInterval(function(date) {\n  date.setUTCSeconds(0, 0);\n}, function(date, step) {\n  date.setTime(+date + step * durationMinute$1);\n}, function(start, end) {\n  return (end - start) / durationMinute$1;\n}, function(date) {\n  return date.getUTCMinutes();\n});\n\nvar utcMinutes = utcMinute.range;\n\nvar utcHour = newInterval(function(date) {\n  date.setUTCMinutes(0, 0, 0);\n}, function(date, step) {\n  date.setTime(+date + step * durationHour$1);\n}, function(start, end) {\n  return (end - start) / durationHour$1;\n}, function(date) {\n  return date.getUTCHours();\n});\n\nvar utcHours = utcHour.range;\n\nvar utcDay = newInterval(function(date) {\n  date.setUTCHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setUTCDate(date.getUTCDate() + step);\n}, function(start, end) {\n  return (end - start) / durationDay$1;\n}, function(date) {\n  return date.getUTCDate() - 1;\n});\n\nvar utcDays = utcDay.range;\n\nfunction utcWeekday(i) {\n  return newInterval(function(date) {\n    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);\n    date.setUTCHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setUTCDate(date.getUTCDate() + step * 7);\n  }, function(start, end) {\n    return (end - start) / durationWeek$1;\n  });\n}\n\nvar utcSunday = utcWeekday(0);\nvar utcMonday = utcWeekday(1);\nvar utcTuesday = utcWeekday(2);\nvar utcWednesday = utcWeekday(3);\nvar utcThursday = utcWeekday(4);\nvar utcFriday = utcWeekday(5);\nvar utcSaturday = utcWeekday(6);\n\nvar utcSundays = utcSunday.range;\nvar utcMondays = utcMonday.range;\nvar utcTuesdays = utcTuesday.range;\nvar utcWednesdays = utcWednesday.range;\nvar utcThursdays = utcThursday.range;\nvar utcFridays = utcFriday.range;\nvar utcSaturdays = utcSaturday.range;\n\nvar utcMonth = newInterval(function(date) {\n  date.setUTCDate(1);\n  date.setUTCHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setUTCMonth(date.getUTCMonth() + step);\n}, function(start, end) {\n  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;\n}, function(date) {\n  return date.getUTCMonth();\n});\n\nvar utcMonths = utcMonth.range;\n\nvar utcYear = newInterval(function(date) {\n  date.setUTCMonth(0, 1);\n  date.setUTCHours(0, 0, 0, 0);\n}, function(date, step) {\n  date.setUTCFullYear(date.getUTCFullYear() + step);\n}, function(start, end) {\n  return end.getUTCFullYear() - start.getUTCFullYear();\n}, function(date) {\n  return date.getUTCFullYear();\n});\n\n// An optimized implementation for this simple case.\nutcYear.every = function(k) {\n  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {\n    date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);\n    date.setUTCMonth(0, 1);\n    date.setUTCHours(0, 0, 0, 0);\n  }, function(date, step) {\n    date.setUTCFullYear(date.getUTCFullYear() + step * k);\n  });\n};\n\nvar utcYears = utcYear.range;\n\nfunction localDate(d) {\n  if (0 <= d.y && d.y < 100) {\n    var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);\n    date.setFullYear(d.y);\n    return date;\n  }\n  return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);\n}\n\nfunction utcDate(d) {\n  if (0 <= d.y && d.y < 100) {\n    var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));\n    date.setUTCFullYear(d.y);\n    return date;\n  }\n  return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));\n}\n\nfunction newYear(y) {\n  return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0};\n}\n\nfunction formatLocale$1(locale) {\n  var locale_dateTime = locale.dateTime,\n      locale_date = locale.date,\n      locale_time = locale.time,\n      locale_periods = locale.periods,\n      locale_weekdays = locale.days,\n      locale_shortWeekdays = locale.shortDays,\n      locale_months = locale.months,\n      locale_shortMonths = locale.shortMonths;\n\n  var periodRe = formatRe(locale_periods),\n      periodLookup = formatLookup(locale_periods),\n      weekdayRe = formatRe(locale_weekdays),\n      weekdayLookup = formatLookup(locale_weekdays),\n      shortWeekdayRe = formatRe(locale_shortWeekdays),\n      shortWeekdayLookup = formatLookup(locale_shortWeekdays),\n      monthRe = formatRe(locale_months),\n      monthLookup = formatLookup(locale_months),\n      shortMonthRe = formatRe(locale_shortMonths),\n      shortMonthLookup = formatLookup(locale_shortMonths);\n\n  var formats = {\n    \"a\": formatShortWeekday,\n    \"A\": formatWeekday,\n    \"b\": formatShortMonth,\n    \"B\": formatMonth,\n    \"c\": null,\n    \"d\": formatDayOfMonth,\n    \"e\": formatDayOfMonth,\n    \"H\": formatHour24,\n    \"I\": formatHour12,\n    \"j\": formatDayOfYear,\n    \"L\": formatMilliseconds,\n    \"m\": formatMonthNumber,\n    \"M\": formatMinutes,\n    \"p\": formatPeriod,\n    \"S\": formatSeconds,\n    \"U\": formatWeekNumberSunday,\n    \"w\": formatWeekdayNumber,\n    \"W\": formatWeekNumberMonday,\n    \"x\": null,\n    \"X\": null,\n    \"y\": formatYear,\n    \"Y\": formatFullYear,\n    \"Z\": formatZone,\n    \"%\": formatLiteralPercent\n  };\n\n  var utcFormats = {\n    \"a\": formatUTCShortWeekday,\n    \"A\": formatUTCWeekday,\n    \"b\": formatUTCShortMonth,\n    \"B\": formatUTCMonth,\n    \"c\": null,\n    \"d\": formatUTCDayOfMonth,\n    \"e\": formatUTCDayOfMonth,\n    \"H\": formatUTCHour24,\n    \"I\": formatUTCHour12,\n    \"j\": formatUTCDayOfYear,\n    \"L\": formatUTCMilliseconds,\n    \"m\": formatUTCMonthNumber,\n    \"M\": formatUTCMinutes,\n    \"p\": formatUTCPeriod,\n    \"S\": formatUTCSeconds,\n    \"U\": formatUTCWeekNumberSunday,\n    \"w\": formatUTCWeekdayNumber,\n    \"W\": formatUTCWeekNumberMonday,\n    \"x\": null,\n    \"X\": null,\n    \"y\": formatUTCYear,\n    \"Y\": formatUTCFullYear,\n    \"Z\": formatUTCZone,\n    \"%\": formatLiteralPercent\n  };\n\n  var parses = {\n    \"a\": parseShortWeekday,\n    \"A\": parseWeekday,\n    \"b\": parseShortMonth,\n    \"B\": parseMonth,\n    \"c\": parseLocaleDateTime,\n    \"d\": parseDayOfMonth,\n    \"e\": parseDayOfMonth,\n    \"H\": parseHour24,\n    \"I\": parseHour24,\n    \"j\": parseDayOfYear,\n    \"L\": parseMilliseconds,\n    \"m\": parseMonthNumber,\n    \"M\": parseMinutes,\n    \"p\": parsePeriod,\n    \"S\": parseSeconds,\n    \"U\": parseWeekNumberSunday,\n    \"w\": parseWeekdayNumber,\n    \"W\": parseWeekNumberMonday,\n    \"x\": parseLocaleDate,\n    \"X\": parseLocaleTime,\n    \"y\": parseYear,\n    \"Y\": parseFullYear,\n    \"Z\": parseZone,\n    \"%\": parseLiteralPercent\n  };\n\n  // These recursive directive definitions must be deferred.\n  formats.x = newFormat(locale_date, formats);\n  formats.X = newFormat(locale_time, formats);\n  formats.c = newFormat(locale_dateTime, formats);\n  utcFormats.x = newFormat(locale_date, utcFormats);\n  utcFormats.X = newFormat(locale_time, utcFormats);\n  utcFormats.c = newFormat(locale_dateTime, utcFormats);\n\n  function newFormat(specifier, formats) {\n    return function(date) {\n      var string = [],\n          i = -1,\n          j = 0,\n          n = specifier.length,\n          c,\n          pad,\n          format;\n\n      if (!(date instanceof Date)) date = new Date(+date);\n\n      while (++i < n) {\n        if (specifier.charCodeAt(i) === 37) {\n          string.push(specifier.slice(j, i));\n          if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);\n          else pad = c === \"e\" ? \" \" : \"0\";\n          if (format = formats[c]) c = format(date, pad);\n          string.push(c);\n          j = i + 1;\n        }\n      }\n\n      string.push(specifier.slice(j, i));\n      return string.join(\"\");\n    };\n  }\n\n  function newParse(specifier, newDate) {\n    return function(string) {\n      var d = newYear(1900),\n          i = parseSpecifier(d, specifier, string += \"\", 0);\n      if (i != string.length) return null;\n\n      // The am-pm flag is 0 for AM, and 1 for PM.\n      if (\"p\" in d) d.H = d.H % 12 + d.p * 12;\n\n      // Convert day-of-week and week-of-year to day-of-year.\n      if (\"W\" in d || \"U\" in d) {\n        if (!(\"w\" in d)) d.w = \"W\" in d ? 1 : 0;\n        var day$$1 = \"Z\" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();\n        d.m = 0;\n        d.d = \"W\" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7;\n      }\n\n      // If a time zone is specified, all fields are interpreted as UTC and then\n      // offset according to the specified time zone.\n      if (\"Z\" in d) {\n        d.H += d.Z / 100 | 0;\n        d.M += d.Z % 100;\n        return utcDate(d);\n      }\n\n      // Otherwise, all fields are in local time.\n      return newDate(d);\n    };\n  }\n\n  function parseSpecifier(d, specifier, string, j) {\n    var i = 0,\n        n = specifier.length,\n        m = string.length,\n        c,\n        parse;\n\n    while (i < n) {\n      if (j >= m) return -1;\n      c = specifier.charCodeAt(i++);\n      if (c === 37) {\n        c = specifier.charAt(i++);\n        parse = parses[c in pads ? specifier.charAt(i++) : c];\n        if (!parse || ((j = parse(d, string, j)) < 0)) return -1;\n      } else if (c != string.charCodeAt(j++)) {\n        return -1;\n      }\n    }\n\n    return j;\n  }\n\n  function parsePeriod(d, string, i) {\n    var n = periodRe.exec(string.slice(i));\n    return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseShortWeekday(d, string, i) {\n    var n = shortWeekdayRe.exec(string.slice(i));\n    return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseWeekday(d, string, i) {\n    var n = weekdayRe.exec(string.slice(i));\n    return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseShortMonth(d, string, i) {\n    var n = shortMonthRe.exec(string.slice(i));\n    return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseMonth(d, string, i) {\n    var n = monthRe.exec(string.slice(i));\n    return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n  }\n\n  function parseLocaleDateTime(d, string, i) {\n    return parseSpecifier(d, locale_dateTime, string, i);\n  }\n\n  function parseLocaleDate(d, string, i) {\n    return parseSpecifier(d, locale_date, string, i);\n  }\n\n  function parseLocaleTime(d, string, i) {\n    return parseSpecifier(d, locale_time, string, i);\n  }\n\n  function formatShortWeekday(d) {\n    return locale_shortWeekdays[d.getDay()];\n  }\n\n  function formatWeekday(d) {\n    return locale_weekdays[d.getDay()];\n  }\n\n  function formatShortMonth(d) {\n    return locale_shortMonths[d.getMonth()];\n  }\n\n  function formatMonth(d) {\n    return locale_months[d.getMonth()];\n  }\n\n  function formatPeriod(d) {\n    return locale_periods[+(d.getHours() >= 12)];\n  }\n\n  function formatUTCShortWeekday(d) {\n    return locale_shortWeekdays[d.getUTCDay()];\n  }\n\n  function formatUTCWeekday(d) {\n    return locale_weekdays[d.getUTCDay()];\n  }\n\n  function formatUTCShortMonth(d) {\n    return locale_shortMonths[d.getUTCMonth()];\n  }\n\n  function formatUTCMonth(d) {\n    return locale_months[d.getUTCMonth()];\n  }\n\n  function formatUTCPeriod(d) {\n    return locale_periods[+(d.getUTCHours() >= 12)];\n  }\n\n  return {\n    format: function(specifier) {\n      var f = newFormat(specifier += \"\", formats);\n      f.toString = function() { return specifier; };\n      return f;\n    },\n    parse: function(specifier) {\n      var p = newParse(specifier += \"\", localDate);\n      p.toString = function() { return specifier; };\n      return p;\n    },\n    utcFormat: function(specifier) {\n      var f = newFormat(specifier += \"\", utcFormats);\n      f.toString = function() { return specifier; };\n      return f;\n    },\n    utcParse: function(specifier) {\n      var p = newParse(specifier, utcDate);\n      p.toString = function() { return specifier; };\n      return p;\n    }\n  };\n}\n\nvar pads = {\"-\": \"\", \"_\": \" \", \"0\": \"0\"};\nvar numberRe = /^\\s*\\d+/;\nvar percentRe = /^%/;\nvar requoteRe = /[\\\\\\^\\$\\*\\+\\?\\|\\[\\]\\(\\)\\.\\{\\}]/g;\n\nfunction pad(value, fill, width) {\n  var sign = value < 0 ? \"-\" : \"\",\n      string = (sign ? -value : value) + \"\",\n      length = string.length;\n  return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);\n}\n\nfunction requote(s) {\n  return s.replace(requoteRe, \"\\\\$&\");\n}\n\nfunction formatRe(names) {\n  return new RegExp(\"^(?:\" + names.map(requote).join(\"|\") + \")\", \"i\");\n}\n\nfunction formatLookup(names) {\n  var map = {}, i = -1, n = names.length;\n  while (++i < n) map[names[i].toLowerCase()] = i;\n  return map;\n}\n\nfunction parseWeekdayNumber(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 1));\n  return n ? (d.w = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseWeekNumberSunday(d, string, i) {\n  var n = numberRe.exec(string.slice(i));\n  return n ? (d.U = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseWeekNumberMonday(d, string, i) {\n  var n = numberRe.exec(string.slice(i));\n  return n ? (d.W = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseFullYear(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 4));\n  return n ? (d.y = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseYear(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;\n}\n\nfunction parseZone(d, string, i) {\n  var n = /^(Z)|([+-]\\d\\d)(?:\\:?(\\d\\d))?/.exec(string.slice(i, i + 6));\n  return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || \"00\")), i + n[0].length) : -1;\n}\n\nfunction parseMonthNumber(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.m = n[0] - 1, i + n[0].length) : -1;\n}\n\nfunction parseDayOfMonth(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.d = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseDayOfYear(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 3));\n  return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseHour24(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.H = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseMinutes(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.M = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseSeconds(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 2));\n  return n ? (d.S = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseMilliseconds(d, string, i) {\n  var n = numberRe.exec(string.slice(i, i + 3));\n  return n ? (d.L = +n[0], i + n[0].length) : -1;\n}\n\nfunction parseLiteralPercent(d, string, i) {\n  var n = percentRe.exec(string.slice(i, i + 1));\n  return n ? i + n[0].length : -1;\n}\n\nfunction formatDayOfMonth(d, p) {\n  return pad(d.getDate(), p, 2);\n}\n\nfunction formatHour24(d, p) {\n  return pad(d.getHours(), p, 2);\n}\n\nfunction formatHour12(d, p) {\n  return pad(d.getHours() % 12 || 12, p, 2);\n}\n\nfunction formatDayOfYear(d, p) {\n  return pad(1 + day.count(year(d), d), p, 3);\n}\n\nfunction formatMilliseconds(d, p) {\n  return pad(d.getMilliseconds(), p, 3);\n}\n\nfunction formatMonthNumber(d, p) {\n  return pad(d.getMonth() + 1, p, 2);\n}\n\nfunction formatMinutes(d, p) {\n  return pad(d.getMinutes(), p, 2);\n}\n\nfunction formatSeconds(d, p) {\n  return pad(d.getSeconds(), p, 2);\n}\n\nfunction formatWeekNumberSunday(d, p) {\n  return pad(sunday.count(year(d), d), p, 2);\n}\n\nfunction formatWeekdayNumber(d) {\n  return d.getDay();\n}\n\nfunction formatWeekNumberMonday(d, p) {\n  return pad(monday.count(year(d), d), p, 2);\n}\n\nfunction formatYear(d, p) {\n  return pad(d.getFullYear() % 100, p, 2);\n}\n\nfunction formatFullYear(d, p) {\n  return pad(d.getFullYear() % 10000, p, 4);\n}\n\nfunction formatZone(d) {\n  var z = d.getTimezoneOffset();\n  return (z > 0 ? \"-\" : (z *= -1, \"+\"))\n      + pad(z / 60 | 0, \"0\", 2)\n      + pad(z % 60, \"0\", 2);\n}\n\nfunction formatUTCDayOfMonth(d, p) {\n  return pad(d.getUTCDate(), p, 2);\n}\n\nfunction formatUTCHour24(d, p) {\n  return pad(d.getUTCHours(), p, 2);\n}\n\nfunction formatUTCHour12(d, p) {\n  return pad(d.getUTCHours() % 12 || 12, p, 2);\n}\n\nfunction formatUTCDayOfYear(d, p) {\n  return pad(1 + utcDay.count(utcYear(d), d), p, 3);\n}\n\nfunction formatUTCMilliseconds(d, p) {\n  return pad(d.getUTCMilliseconds(), p, 3);\n}\n\nfunction formatUTCMonthNumber(d, p) {\n  return pad(d.getUTCMonth() + 1, p, 2);\n}\n\nfunction formatUTCMinutes(d, p) {\n  return pad(d.getUTCMinutes(), p, 2);\n}\n\nfunction formatUTCSeconds(d, p) {\n  return pad(d.getUTCSeconds(), p, 2);\n}\n\nfunction formatUTCWeekNumberSunday(d, p) {\n  return pad(utcSunday.count(utcYear(d), d), p, 2);\n}\n\nfunction formatUTCWeekdayNumber(d) {\n  return d.getUTCDay();\n}\n\nfunction formatUTCWeekNumberMonday(d, p) {\n  return pad(utcMonday.count(utcYear(d), d), p, 2);\n}\n\nfunction formatUTCYear(d, p) {\n  return pad(d.getUTCFullYear() % 100, p, 2);\n}\n\nfunction formatUTCFullYear(d, p) {\n  return pad(d.getUTCFullYear() % 10000, p, 4);\n}\n\nfunction formatUTCZone() {\n  return \"+0000\";\n}\n\nfunction formatLiteralPercent() {\n  return \"%\";\n}\n\nvar locale$2;\n\n\n\n\n\ndefaultLocale$1({\n  dateTime: \"%x, %X\",\n  date: \"%-m/%-d/%Y\",\n  time: \"%-I:%M:%S %p\",\n  periods: [\"AM\", \"PM\"],\n  days: [\"Sunday\", \"Monday\", \"Tuesday\", \"Wednesday\", \"Thursday\", \"Friday\", \"Saturday\"],\n  shortDays: [\"Sun\", \"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\"],\n  months: [\"January\", \"February\", \"March\", \"April\", \"May\", \"June\", \"July\", \"August\", \"September\", \"October\", \"November\", \"December\"],\n  shortMonths: [\"Jan\", \"Feb\", \"Mar\", \"Apr\", \"May\", \"Jun\", \"Jul\", \"Aug\", \"Sep\", \"Oct\", \"Nov\", \"Dec\"]\n});\n\nfunction defaultLocale$1(definition) {\n  locale$2 = formatLocale$1(definition);\n  exports.timeFormat = locale$2.format;\n  exports.timeParse = locale$2.parse;\n  exports.utcFormat = locale$2.utcFormat;\n  exports.utcParse = locale$2.utcParse;\n  return locale$2;\n}\n\nvar isoSpecifier = \"%Y-%m-%dT%H:%M:%S.%LZ\";\n\nfunction formatIsoNative(date) {\n  return date.toISOString();\n}\n\nvar formatIso = Date.prototype.toISOString\n    ? formatIsoNative\n    : exports.utcFormat(isoSpecifier);\n\nfunction parseIsoNative(string) {\n  var date = new Date(string);\n  return isNaN(date) ? null : date;\n}\n\nvar parseIso = +new Date(\"2000-01-01T00:00:00.000Z\")\n    ? parseIsoNative\n    : exports.utcParse(isoSpecifier);\n\nvar durationSecond = 1000;\nvar durationMinute = durationSecond * 60;\nvar durationHour = durationMinute * 60;\nvar durationDay = durationHour * 24;\nvar durationWeek = durationDay * 7;\nvar durationMonth = durationDay * 30;\nvar durationYear = durationDay * 365;\n\nfunction date$1(t) {\n  return new Date(t);\n}\n\nfunction number$2(t) {\n  return t instanceof Date ? +t : +new Date(+t);\n}\n\nfunction calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format) {\n  var scale = continuous(deinterpolateLinear, reinterpolate),\n      invert = scale.invert,\n      domain = scale.domain;\n\n  var formatMillisecond = format(\".%L\"),\n      formatSecond = format(\":%S\"),\n      formatMinute = format(\"%I:%M\"),\n      formatHour = format(\"%I %p\"),\n      formatDay = format(\"%a %d\"),\n      formatWeek = format(\"%b %d\"),\n      formatMonth = format(\"%B\"),\n      formatYear = format(\"%Y\");\n\n  var tickIntervals = [\n    [second$$1,  1,      durationSecond],\n    [second$$1,  5,  5 * durationSecond],\n    [second$$1, 15, 15 * durationSecond],\n    [second$$1, 30, 30 * durationSecond],\n    [minute$$1,  1,      durationMinute],\n    [minute$$1,  5,  5 * durationMinute],\n    [minute$$1, 15, 15 * durationMinute],\n    [minute$$1, 30, 30 * durationMinute],\n    [  hour$$1,  1,      durationHour  ],\n    [  hour$$1,  3,  3 * durationHour  ],\n    [  hour$$1,  6,  6 * durationHour  ],\n    [  hour$$1, 12, 12 * durationHour  ],\n    [   day$$1,  1,      durationDay   ],\n    [   day$$1,  2,  2 * durationDay   ],\n    [  week,  1,      durationWeek  ],\n    [ month$$1,  1,      durationMonth ],\n    [ month$$1,  3,  3 * durationMonth ],\n    [  year$$1,  1,      durationYear  ]\n  ];\n\n  function tickFormat(date) {\n    return (second$$1(date) < date ? formatMillisecond\n        : minute$$1(date) < date ? formatSecond\n        : hour$$1(date) < date ? formatMinute\n        : day$$1(date) < date ? formatHour\n        : month$$1(date) < date ? (week(date) < date ? formatDay : formatWeek)\n        : year$$1(date) < date ? formatMonth\n        : formatYear)(date);\n  }\n\n  function tickInterval(interval, start, stop, step) {\n    if (interval == null) interval = 10;\n\n    // If a desired tick count is specified, pick a reasonable tick interval\n    // based on the extent of the domain and a rough estimate of tick size.\n    // Otherwise, assume interval is already a time interval and use it.\n    if (typeof interval === \"number\") {\n      var target = Math.abs(stop - start) / interval,\n          i = bisector(function(i) { return i[2]; }).right(tickIntervals, target);\n      if (i === tickIntervals.length) {\n        step = tickStep(start / durationYear, stop / durationYear, interval);\n        interval = year$$1;\n      } else if (i) {\n        i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];\n        step = i[1];\n        interval = i[0];\n      } else {\n        step = tickStep(start, stop, interval);\n        interval = millisecond$$1;\n      }\n    }\n\n    return step == null ? interval : interval.every(step);\n  }\n\n  scale.invert = function(y) {\n    return new Date(invert(y));\n  };\n\n  scale.domain = function(_) {\n    return arguments.length ? domain(map$3.call(_, number$2)) : domain().map(date$1);\n  };\n\n  scale.ticks = function(interval, step) {\n    var d = domain(),\n        t0 = d[0],\n        t1 = d[d.length - 1],\n        r = t1 < t0,\n        t;\n    if (r) t = t0, t0 = t1, t1 = t;\n    t = tickInterval(interval, t0, t1, step);\n    t = t ? t.range(t0, t1 + 1) : []; // inclusive stop\n    return r ? t.reverse() : t;\n  };\n\n  scale.tickFormat = function(count, specifier) {\n    return specifier == null ? tickFormat : format(specifier);\n  };\n\n  scale.nice = function(interval, step) {\n    var d = domain();\n    return (interval = tickInterval(interval, d[0], d[d.length - 1], step))\n        ? domain(nice(d, interval))\n        : scale;\n  };\n\n  scale.copy = function() {\n    return copy(scale, calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format));\n  };\n\n  return scale;\n}\n\nvar time = function() {\n  return calendar(year, month, sunday, day, hour, minute, second, millisecond, exports.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]);\n};\n\nvar utcTime = function() {\n  return calendar(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute, second, millisecond, exports.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]);\n};\n\nvar colors = function(s) {\n  return s.match(/.{6}/g).map(function(x) {\n    return \"#\" + x;\n  });\n};\n\nvar category10 = colors(\"1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf\");\n\nvar category20b = colors(\"393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6\");\n\nvar category20c = colors(\"3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9\");\n\nvar category20 = colors(\"1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5\");\n\nvar cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));\n\nvar warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));\n\nvar cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8));\n\nvar rainbow = cubehelix();\n\nvar rainbow$1 = function(t) {\n  if (t < 0 || t > 1) t -= Math.floor(t);\n  var ts = Math.abs(t - 0.5);\n  rainbow.h = 360 * t - 100;\n  rainbow.s = 1.5 - 1.5 * ts;\n  rainbow.l = 0.8 - 0.9 * ts;\n  return rainbow + \"\";\n};\n\nfunction ramp(range) {\n  var n = range.length;\n  return function(t) {\n    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];\n  };\n}\n\nvar viridis = ramp(colors(\"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\"));\n\nvar magma = ramp(colors(\"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\"));\n\nvar inferno = ramp(colors(\"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\"));\n\nvar plasma = ramp(colors(\"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\"));\n\nfunction sequential(interpolator) {\n  var x0 = 0,\n      x1 = 1,\n      clamp = false;\n\n  function scale(x) {\n    var t = (x - x0) / (x1 - x0);\n    return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);\n  }\n\n  scale.domain = function(_) {\n    return arguments.length ? (x0 = +_[0], x1 = +_[1], scale) : [x0, x1];\n  };\n\n  scale.clamp = function(_) {\n    return arguments.length ? (clamp = !!_, scale) : clamp;\n  };\n\n  scale.interpolator = function(_) {\n    return arguments.length ? (interpolator = _, scale) : interpolator;\n  };\n\n  scale.copy = function() {\n    return sequential(interpolator).domain([x0, x1]).clamp(clamp);\n  };\n\n  return linearish(scale);\n}\n\nvar constant$10 = function(x) {\n  return function constant() {\n    return x;\n  };\n};\n\nvar abs$1 = Math.abs;\nvar atan2$1 = Math.atan2;\nvar cos$2 = Math.cos;\nvar max$2 = Math.max;\nvar min$1 = Math.min;\nvar sin$2 = Math.sin;\nvar sqrt$2 = Math.sqrt;\n\nvar epsilon$3 = 1e-12;\nvar pi$4 = Math.PI;\nvar halfPi$3 = pi$4 / 2;\nvar tau$4 = 2 * pi$4;\n\nfunction acos$1(x) {\n  return x > 1 ? 0 : x < -1 ? pi$4 : Math.acos(x);\n}\n\nfunction asin$1(x) {\n  return x >= 1 ? halfPi$3 : x <= -1 ? -halfPi$3 : Math.asin(x);\n}\n\nfunction arcInnerRadius(d) {\n  return d.innerRadius;\n}\n\nfunction arcOuterRadius(d) {\n  return d.outerRadius;\n}\n\nfunction arcStartAngle(d) {\n  return d.startAngle;\n}\n\nfunction arcEndAngle(d) {\n  return d.endAngle;\n}\n\nfunction arcPadAngle(d) {\n  return d && d.padAngle; // Note: optional!\n}\n\nfunction intersect(x0, y0, x1, y1, x2, y2, x3, y3) {\n  var x10 = x1 - x0, y10 = y1 - y0,\n      x32 = x3 - x2, y32 = y3 - y2,\n      t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10);\n  return [x0 + t * x10, y0 + t * y10];\n}\n\n// Compute perpendicular offset line of length rc.\n// http://mathworld.wolfram.com/Circle-LineIntersection.html\nfunction cornerTangents(x0, y0, x1, y1, r1, rc, cw) {\n  var x01 = x0 - x1,\n      y01 = y0 - y1,\n      lo = (cw ? rc : -rc) / sqrt$2(x01 * x01 + y01 * y01),\n      ox = lo * y01,\n      oy = -lo * x01,\n      x11 = x0 + ox,\n      y11 = y0 + oy,\n      x10 = x1 + ox,\n      y10 = y1 + oy,\n      x00 = (x11 + x10) / 2,\n      y00 = (y11 + y10) / 2,\n      dx = x10 - x11,\n      dy = y10 - y11,\n      d2 = dx * dx + dy * dy,\n      r = r1 - rc,\n      D = x11 * y10 - x10 * y11,\n      d = (dy < 0 ? -1 : 1) * sqrt$2(max$2(0, r * r * d2 - D * D)),\n      cx0 = (D * dy - dx * d) / d2,\n      cy0 = (-D * dx - dy * d) / d2,\n      cx1 = (D * dy + dx * d) / d2,\n      cy1 = (-D * dx + dy * d) / d2,\n      dx0 = cx0 - x00,\n      dy0 = cy0 - y00,\n      dx1 = cx1 - x00,\n      dy1 = cy1 - y00;\n\n  // Pick the closer of the two intersection points.\n  // TODO Is there a faster way to determine which intersection to use?\n  if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;\n\n  return {\n    cx: cx0,\n    cy: cy0,\n    x01: -ox,\n    y01: -oy,\n    x11: cx0 * (r1 / r - 1),\n    y11: cy0 * (r1 / r - 1)\n  };\n}\n\nvar arc = function() {\n  var innerRadius = arcInnerRadius,\n      outerRadius = arcOuterRadius,\n      cornerRadius = constant$10(0),\n      padRadius = null,\n      startAngle = arcStartAngle,\n      endAngle = arcEndAngle,\n      padAngle = arcPadAngle,\n      context = null;\n\n  function arc() {\n    var buffer,\n        r,\n        r0 = +innerRadius.apply(this, arguments),\n        r1 = +outerRadius.apply(this, arguments),\n        a0 = startAngle.apply(this, arguments) - halfPi$3,\n        a1 = endAngle.apply(this, arguments) - halfPi$3,\n        da = abs$1(a1 - a0),\n        cw = a1 > a0;\n\n    if (!context) context = buffer = path();\n\n    // Ensure that the outer radius is always larger than the inner radius.\n    if (r1 < r0) r = r1, r1 = r0, r0 = r;\n\n    // Is it a point?\n    if (!(r1 > epsilon$3)) context.moveTo(0, 0);\n\n    // Or is it a circle or annulus?\n    else if (da > tau$4 - epsilon$3) {\n      context.moveTo(r1 * cos$2(a0), r1 * sin$2(a0));\n      context.arc(0, 0, r1, a0, a1, !cw);\n      if (r0 > epsilon$3) {\n        context.moveTo(r0 * cos$2(a1), r0 * sin$2(a1));\n        context.arc(0, 0, r0, a1, a0, cw);\n      }\n    }\n\n    // Or is it a circular or annular sector?\n    else {\n      var a01 = a0,\n          a11 = a1,\n          a00 = a0,\n          a10 = a1,\n          da0 = da,\n          da1 = da,\n          ap = padAngle.apply(this, arguments) / 2,\n          rp = (ap > epsilon$3) && (padRadius ? +padRadius.apply(this, arguments) : sqrt$2(r0 * r0 + r1 * r1)),\n          rc = min$1(abs$1(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),\n          rc0 = rc,\n          rc1 = rc,\n          t0,\n          t1;\n\n      // Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.\n      if (rp > epsilon$3) {\n        var p0 = asin$1(rp / r0 * sin$2(ap)),\n            p1 = asin$1(rp / r1 * sin$2(ap));\n        if ((da0 -= p0 * 2) > epsilon$3) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;\n        else da0 = 0, a00 = a10 = (a0 + a1) / 2;\n        if ((da1 -= p1 * 2) > epsilon$3) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;\n        else da1 = 0, a01 = a11 = (a0 + a1) / 2;\n      }\n\n      var x01 = r1 * cos$2(a01),\n          y01 = r1 * sin$2(a01),\n          x10 = r0 * cos$2(a10),\n          y10 = r0 * sin$2(a10);\n\n      // Apply rounded corners?\n      if (rc > epsilon$3) {\n        var x11 = r1 * cos$2(a11),\n            y11 = r1 * sin$2(a11),\n            x00 = r0 * cos$2(a00),\n            y00 = r0 * sin$2(a00);\n\n        // Restrict the corner radius according to the sector angle.\n        if (da < pi$4) {\n          var oc = da0 > epsilon$3 ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10],\n              ax = x01 - oc[0],\n              ay = y01 - oc[1],\n              bx = x11 - oc[0],\n              by = y11 - oc[1],\n              kc = 1 / sin$2(acos$1((ax * bx + ay * by) / (sqrt$2(ax * ax + ay * ay) * sqrt$2(bx * bx + by * by))) / 2),\n              lc = sqrt$2(oc[0] * oc[0] + oc[1] * oc[1]);\n          rc0 = min$1(rc, (r0 - lc) / (kc - 1));\n          rc1 = min$1(rc, (r1 - lc) / (kc + 1));\n        }\n      }\n\n      // Is the sector collapsed to a line?\n      if (!(da1 > epsilon$3)) context.moveTo(x01, y01);\n\n      // Does the sector’s outer ring have rounded corners?\n      else if (rc1 > epsilon$3) {\n        t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);\n        t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);\n\n        context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);\n\n        // Have the corners merged?\n        if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw);\n\n        // Otherwise, draw the two corners and the ring.\n        else {\n          context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw);\n          context.arc(0, 0, r1, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), !cw);\n          context.arc(t1.cx, t1.cy, rc1, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw);\n        }\n      }\n\n      // Or is the outer ring just a circular arc?\n      else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);\n\n      // Is there no inner ring, and it’s a circular sector?\n      // Or perhaps it’s an annular sector collapsed due to padding?\n      if (!(r0 > epsilon$3) || !(da0 > epsilon$3)) context.lineTo(x10, y10);\n\n      // Does the sector’s inner ring (or point) have rounded corners?\n      else if (rc0 > epsilon$3) {\n        t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);\n        t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);\n\n        context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);\n\n        // Have the corners merged?\n        if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw);\n\n        // Otherwise, draw the two corners and the ring.\n        else {\n          context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw);\n          context.arc(0, 0, r0, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), cw);\n          context.arc(t1.cx, t1.cy, rc0, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw);\n        }\n      }\n\n      // Or is the inner ring just a circular arc?\n      else context.arc(0, 0, r0, a10, a00, cw);\n    }\n\n    context.closePath();\n\n    if (buffer) return context = null, buffer + \"\" || null;\n  }\n\n  arc.centroid = function() {\n    var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,\n        a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi$4 / 2;\n    return [cos$2(a) * r, sin$2(a) * r];\n  };\n\n  arc.innerRadius = function(_) {\n    return arguments.length ? (innerRadius = typeof _ === \"function\" ? _ : constant$10(+_), arc) : innerRadius;\n  };\n\n  arc.outerRadius = function(_) {\n    return arguments.length ? (outerRadius = typeof _ === \"function\" ? _ : constant$10(+_), arc) : outerRadius;\n  };\n\n  arc.cornerRadius = function(_) {\n    return arguments.length ? (cornerRadius = typeof _ === \"function\" ? _ : constant$10(+_), arc) : cornerRadius;\n  };\n\n  arc.padRadius = function(_) {\n    return arguments.length ? (padRadius = _ == null ? null : typeof _ === \"function\" ? _ : constant$10(+_), arc) : padRadius;\n  };\n\n  arc.startAngle = function(_) {\n    return arguments.length ? (startAngle = typeof _ === \"function\" ? _ : constant$10(+_), arc) : startAngle;\n  };\n\n  arc.endAngle = function(_) {\n    return arguments.length ? (endAngle = typeof _ === \"function\" ? _ : constant$10(+_), arc) : endAngle;\n  };\n\n  arc.padAngle = function(_) {\n    return arguments.length ? (padAngle = typeof _ === \"function\" ? _ : constant$10(+_), arc) : padAngle;\n  };\n\n  arc.context = function(_) {\n    return arguments.length ? ((context = _ == null ? null : _), arc) : context;\n  };\n\n  return arc;\n};\n\nfunction Linear(context) {\n  this._context = context;\n}\n\nLinear.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; // proceed\n      default: this._context.lineTo(x, y); break;\n    }\n  }\n};\n\nvar curveLinear = function(context) {\n  return new Linear(context);\n};\n\nfunction x$3(p) {\n  return p[0];\n}\n\nfunction y$3(p) {\n  return p[1];\n}\n\nvar line = function() {\n  var x$$1 = x$3,\n      y$$1 = y$3,\n      defined = constant$10(true),\n      context = null,\n      curve = curveLinear,\n      output = null;\n\n  function line(data) {\n    var i,\n        n = data.length,\n        d,\n        defined0 = false,\n        buffer;\n\n    if (context == null) output = curve(buffer = path());\n\n    for (i = 0; i <= n; ++i) {\n      if (!(i < n && defined(d = data[i], i, data)) === defined0) {\n        if (defined0 = !defined0) output.lineStart();\n        else output.lineEnd();\n      }\n      if (defined0) output.point(+x$$1(d, i, data), +y$$1(d, i, data));\n    }\n\n    if (buffer) return output = null, buffer + \"\" || null;\n  }\n\n  line.x = function(_) {\n    return arguments.length ? (x$$1 = typeof _ === \"function\" ? _ : constant$10(+_), line) : x$$1;\n  };\n\n  line.y = function(_) {\n    return arguments.length ? (y$$1 = typeof _ === \"function\" ? _ : constant$10(+_), line) : y$$1;\n  };\n\n  line.defined = function(_) {\n    return arguments.length ? (defined = typeof _ === \"function\" ? _ : constant$10(!!_), line) : defined;\n  };\n\n  line.curve = function(_) {\n    return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;\n  };\n\n  line.context = function(_) {\n    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;\n  };\n\n  return line;\n};\n\nvar area$2 = function() {\n  var x0 = x$3,\n      x1 = null,\n      y0 = constant$10(0),\n      y1 = y$3,\n      defined = constant$10(true),\n      context = null,\n      curve = curveLinear,\n      output = null;\n\n  function area(data) {\n    var i,\n        j,\n        k,\n        n = data.length,\n        d,\n        defined0 = false,\n        buffer,\n        x0z = new Array(n),\n        y0z = new Array(n);\n\n    if (context == null) output = curve(buffer = path());\n\n    for (i = 0; i <= n; ++i) {\n      if (!(i < n && defined(d = data[i], i, data)) === defined0) {\n        if (defined0 = !defined0) {\n          j = i;\n          output.areaStart();\n          output.lineStart();\n        } else {\n          output.lineEnd();\n          output.lineStart();\n          for (k = i - 1; k >= j; --k) {\n            output.point(x0z[k], y0z[k]);\n          }\n          output.lineEnd();\n          output.areaEnd();\n        }\n      }\n      if (defined0) {\n        x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);\n        output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);\n      }\n    }\n\n    if (buffer) return output = null, buffer + \"\" || null;\n  }\n\n  function arealine() {\n    return line().defined(defined).curve(curve).context(context);\n  }\n\n  area.x = function(_) {\n    return arguments.length ? (x0 = typeof _ === \"function\" ? _ : constant$10(+_), x1 = null, area) : x0;\n  };\n\n  area.x0 = function(_) {\n    return arguments.length ? (x0 = typeof _ === \"function\" ? _ : constant$10(+_), area) : x0;\n  };\n\n  area.x1 = function(_) {\n    return arguments.length ? (x1 = _ == null ? null : typeof _ === \"function\" ? _ : constant$10(+_), area) : x1;\n  };\n\n  area.y = function(_) {\n    return arguments.length ? (y0 = typeof _ === \"function\" ? _ : constant$10(+_), y1 = null, area) : y0;\n  };\n\n  area.y0 = function(_) {\n    return arguments.length ? (y0 = typeof _ === \"function\" ? _ : constant$10(+_), area) : y0;\n  };\n\n  area.y1 = function(_) {\n    return arguments.length ? (y1 = _ == null ? null : typeof _ === \"function\" ? _ : constant$10(+_), area) : y1;\n  };\n\n  area.lineX0 =\n  area.lineY0 = function() {\n    return arealine().x(x0).y(y0);\n  };\n\n  area.lineY1 = function() {\n    return arealine().x(x0).y(y1);\n  };\n\n  area.lineX1 = function() {\n    return arealine().x(x1).y(y0);\n  };\n\n  area.defined = function(_) {\n    return arguments.length ? (defined = typeof _ === \"function\" ? _ : constant$10(!!_), area) : defined;\n  };\n\n  area.curve = function(_) {\n    return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;\n  };\n\n  area.context = function(_) {\n    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;\n  };\n\n  return area;\n};\n\nvar descending$1 = function(a, b) {\n  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;\n};\n\nvar identity$7 = function(d) {\n  return d;\n};\n\nvar pie = function() {\n  var value = identity$7,\n      sortValues = descending$1,\n      sort = null,\n      startAngle = constant$10(0),\n      endAngle = constant$10(tau$4),\n      padAngle = constant$10(0);\n\n  function pie(data) {\n    var i,\n        n = data.length,\n        j,\n        k,\n        sum = 0,\n        index = new Array(n),\n        arcs = new Array(n),\n        a0 = +startAngle.apply(this, arguments),\n        da = Math.min(tau$4, Math.max(-tau$4, endAngle.apply(this, arguments) - a0)),\n        a1,\n        p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),\n        pa = p * (da < 0 ? -1 : 1),\n        v;\n\n    for (i = 0; i < n; ++i) {\n      if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {\n        sum += v;\n      }\n    }\n\n    // Optionally sort the arcs by previously-computed values or by data.\n    if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });\n    else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });\n\n    // Compute the arcs! They are stored in the original data's order.\n    for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {\n      j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {\n        data: data[j],\n        index: i,\n        value: v,\n        startAngle: a0,\n        endAngle: a1,\n        padAngle: p\n      };\n    }\n\n    return arcs;\n  }\n\n  pie.value = function(_) {\n    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant$10(+_), pie) : value;\n  };\n\n  pie.sortValues = function(_) {\n    return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;\n  };\n\n  pie.sort = function(_) {\n    return arguments.length ? (sort = _, sortValues = null, pie) : sort;\n  };\n\n  pie.startAngle = function(_) {\n    return arguments.length ? (startAngle = typeof _ === \"function\" ? _ : constant$10(+_), pie) : startAngle;\n  };\n\n  pie.endAngle = function(_) {\n    return arguments.length ? (endAngle = typeof _ === \"function\" ? _ : constant$10(+_), pie) : endAngle;\n  };\n\n  pie.padAngle = function(_) {\n    return arguments.length ? (padAngle = typeof _ === \"function\" ? _ : constant$10(+_), pie) : padAngle;\n  };\n\n  return pie;\n};\n\nvar curveRadialLinear = curveRadial(curveLinear);\n\nfunction Radial(curve) {\n  this._curve = curve;\n}\n\nRadial.prototype = {\n  areaStart: function() {\n    this._curve.areaStart();\n  },\n  areaEnd: function() {\n    this._curve.areaEnd();\n  },\n  lineStart: function() {\n    this._curve.lineStart();\n  },\n  lineEnd: function() {\n    this._curve.lineEnd();\n  },\n  point: function(a, r) {\n    this._curve.point(r * Math.sin(a), r * -Math.cos(a));\n  }\n};\n\nfunction curveRadial(curve) {\n\n  function radial(context) {\n    return new Radial(curve(context));\n  }\n\n  radial._curve = curve;\n\n  return radial;\n}\n\nfunction radialLine(l) {\n  var c = l.curve;\n\n  l.angle = l.x, delete l.x;\n  l.radius = l.y, delete l.y;\n\n  l.curve = function(_) {\n    return arguments.length ? c(curveRadial(_)) : c()._curve;\n  };\n\n  return l;\n}\n\nvar radialLine$1 = function() {\n  return radialLine(line().curve(curveRadialLinear));\n};\n\nvar radialArea = function() {\n  var a = area$2().curve(curveRadialLinear),\n      c = a.curve,\n      x0 = a.lineX0,\n      x1 = a.lineX1,\n      y0 = a.lineY0,\n      y1 = a.lineY1;\n\n  a.angle = a.x, delete a.x;\n  a.startAngle = a.x0, delete a.x0;\n  a.endAngle = a.x1, delete a.x1;\n  a.radius = a.y, delete a.y;\n  a.innerRadius = a.y0, delete a.y0;\n  a.outerRadius = a.y1, delete a.y1;\n  a.lineStartAngle = function() { return radialLine(x0()); }, delete a.lineX0;\n  a.lineEndAngle = function() { return radialLine(x1()); }, delete a.lineX1;\n  a.lineInnerRadius = function() { return radialLine(y0()); }, delete a.lineY0;\n  a.lineOuterRadius = function() { return radialLine(y1()); }, delete a.lineY1;\n\n  a.curve = function(_) {\n    return arguments.length ? c(curveRadial(_)) : c()._curve;\n  };\n\n  return a;\n};\n\nvar circle$2 = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size / pi$4);\n    context.moveTo(r, 0);\n    context.arc(0, 0, r, 0, tau$4);\n  }\n};\n\nvar cross$2 = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size / 5) / 2;\n    context.moveTo(-3 * r, -r);\n    context.lineTo(-r, -r);\n    context.lineTo(-r, -3 * r);\n    context.lineTo(r, -3 * r);\n    context.lineTo(r, -r);\n    context.lineTo(3 * r, -r);\n    context.lineTo(3 * r, r);\n    context.lineTo(r, r);\n    context.lineTo(r, 3 * r);\n    context.lineTo(-r, 3 * r);\n    context.lineTo(-r, r);\n    context.lineTo(-3 * r, r);\n    context.closePath();\n  }\n};\n\nvar tan30 = Math.sqrt(1 / 3);\nvar tan30_2 = tan30 * 2;\n\nvar diamond = {\n  draw: function(context, size) {\n    var y = Math.sqrt(size / tan30_2),\n        x = y * tan30;\n    context.moveTo(0, -y);\n    context.lineTo(x, 0);\n    context.lineTo(0, y);\n    context.lineTo(-x, 0);\n    context.closePath();\n  }\n};\n\nvar ka = 0.89081309152928522810;\nvar kr = Math.sin(pi$4 / 10) / Math.sin(7 * pi$4 / 10);\nvar kx = Math.sin(tau$4 / 10) * kr;\nvar ky = -Math.cos(tau$4 / 10) * kr;\n\nvar star = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size * ka),\n        x = kx * r,\n        y = ky * r;\n    context.moveTo(0, -r);\n    context.lineTo(x, y);\n    for (var i = 1; i < 5; ++i) {\n      var a = tau$4 * i / 5,\n          c = Math.cos(a),\n          s = Math.sin(a);\n      context.lineTo(s * r, -c * r);\n      context.lineTo(c * x - s * y, s * x + c * y);\n    }\n    context.closePath();\n  }\n};\n\nvar square = {\n  draw: function(context, size) {\n    var w = Math.sqrt(size),\n        x = -w / 2;\n    context.rect(x, x, w, w);\n  }\n};\n\nvar sqrt3 = Math.sqrt(3);\n\nvar triangle = {\n  draw: function(context, size) {\n    var y = -Math.sqrt(size / (sqrt3 * 3));\n    context.moveTo(0, y * 2);\n    context.lineTo(-sqrt3 * y, -y);\n    context.lineTo(sqrt3 * y, -y);\n    context.closePath();\n  }\n};\n\nvar c = -0.5;\nvar s = Math.sqrt(3) / 2;\nvar k = 1 / Math.sqrt(12);\nvar a = (k / 2 + 1) * 3;\n\nvar wye = {\n  draw: function(context, size) {\n    var r = Math.sqrt(size / a),\n        x0 = r / 2,\n        y0 = r * k,\n        x1 = x0,\n        y1 = r * k + r,\n        x2 = -x1,\n        y2 = y1;\n    context.moveTo(x0, y0);\n    context.lineTo(x1, y1);\n    context.lineTo(x2, y2);\n    context.lineTo(c * x0 - s * y0, s * x0 + c * y0);\n    context.lineTo(c * x1 - s * y1, s * x1 + c * y1);\n    context.lineTo(c * x2 - s * y2, s * x2 + c * y2);\n    context.lineTo(c * x0 + s * y0, c * y0 - s * x0);\n    context.lineTo(c * x1 + s * y1, c * y1 - s * x1);\n    context.lineTo(c * x2 + s * y2, c * y2 - s * x2);\n    context.closePath();\n  }\n};\n\nvar symbols = [\n  circle$2,\n  cross$2,\n  diamond,\n  square,\n  star,\n  triangle,\n  wye\n];\n\nvar symbol = function() {\n  var type = constant$10(circle$2),\n      size = constant$10(64),\n      context = null;\n\n  function symbol() {\n    var buffer;\n    if (!context) context = buffer = path();\n    type.apply(this, arguments).draw(context, +size.apply(this, arguments));\n    if (buffer) return context = null, buffer + \"\" || null;\n  }\n\n  symbol.type = function(_) {\n    return arguments.length ? (type = typeof _ === \"function\" ? _ : constant$10(_), symbol) : type;\n  };\n\n  symbol.size = function(_) {\n    return arguments.length ? (size = typeof _ === \"function\" ? _ : constant$10(+_), symbol) : size;\n  };\n\n  symbol.context = function(_) {\n    return arguments.length ? (context = _ == null ? null : _, symbol) : context;\n  };\n\n  return symbol;\n};\n\nvar noop$2 = function() {};\n\nfunction point$2(that, x, y) {\n  that._context.bezierCurveTo(\n    (2 * that._x0 + that._x1) / 3,\n    (2 * that._y0 + that._y1) / 3,\n    (that._x0 + 2 * that._x1) / 3,\n    (that._y0 + 2 * that._y1) / 3,\n    (that._x0 + 4 * that._x1 + x) / 6,\n    (that._y0 + 4 * that._y1 + y) / 6\n  );\n}\n\nfunction Basis(context) {\n  this._context = context;\n}\n\nBasis.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 =\n    this._y0 = this._y1 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 3: point$2(this, this._x1, this._y1); // proceed\n      case 2: this._context.lineTo(this._x1, this._y1); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed\n      default: point$2(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n  }\n};\n\nvar basis$2 = function(context) {\n  return new Basis(context);\n};\n\nfunction BasisClosed(context) {\n  this._context = context;\n}\n\nBasisClosed.prototype = {\n  areaStart: noop$2,\n  areaEnd: noop$2,\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =\n    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 1: {\n        this._context.moveTo(this._x2, this._y2);\n        this._context.closePath();\n        break;\n      }\n      case 2: {\n        this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);\n        this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);\n        this._context.closePath();\n        break;\n      }\n      case 3: {\n        this.point(this._x2, this._y2);\n        this.point(this._x3, this._y3);\n        this.point(this._x4, this._y4);\n        break;\n      }\n    }\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._x2 = x, this._y2 = y; break;\n      case 1: this._point = 2; this._x3 = x, this._y3 = y; break;\n      case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;\n      default: point$2(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n  }\n};\n\nvar basisClosed$1 = function(context) {\n  return new BasisClosed(context);\n};\n\nfunction BasisOpen(context) {\n  this._context = context;\n}\n\nBasisOpen.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 =\n    this._y0 = this._y1 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;\n      case 3: this._point = 4; // proceed\n      default: point$2(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n  }\n};\n\nvar basisOpen = function(context) {\n  return new BasisOpen(context);\n};\n\nfunction Bundle(context, beta) {\n  this._basis = new Basis(context);\n  this._beta = beta;\n}\n\nBundle.prototype = {\n  lineStart: function() {\n    this._x = [];\n    this._y = [];\n    this._basis.lineStart();\n  },\n  lineEnd: function() {\n    var x = this._x,\n        y = this._y,\n        j = x.length - 1;\n\n    if (j > 0) {\n      var x0 = x[0],\n          y0 = y[0],\n          dx = x[j] - x0,\n          dy = y[j] - y0,\n          i = -1,\n          t;\n\n      while (++i <= j) {\n        t = i / j;\n        this._basis.point(\n          this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),\n          this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)\n        );\n      }\n    }\n\n    this._x = this._y = null;\n    this._basis.lineEnd();\n  },\n  point: function(x, y) {\n    this._x.push(+x);\n    this._y.push(+y);\n  }\n};\n\nvar bundle = ((function custom(beta) {\n\n  function bundle(context) {\n    return beta === 1 ? new Basis(context) : new Bundle(context, beta);\n  }\n\n  bundle.beta = function(beta) {\n    return custom(+beta);\n  };\n\n  return bundle;\n}))(0.85);\n\nfunction point$3(that, x, y) {\n  that._context.bezierCurveTo(\n    that._x1 + that._k * (that._x2 - that._x0),\n    that._y1 + that._k * (that._y2 - that._y0),\n    that._x2 + that._k * (that._x1 - x),\n    that._y2 + that._k * (that._y1 - y),\n    that._x2,\n    that._y2\n  );\n}\n\nfunction Cardinal(context, tension) {\n  this._context = context;\n  this._k = (1 - tension) / 6;\n}\n\nCardinal.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 2: this._context.lineTo(this._x2, this._y2); break;\n      case 3: point$3(this, this._x1, this._y1); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; this._x1 = x, this._y1 = y; break;\n      case 2: this._point = 3; // proceed\n      default: point$3(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar cardinal = ((function custom(tension) {\n\n  function cardinal(context) {\n    return new Cardinal(context, tension);\n  }\n\n  cardinal.tension = function(tension) {\n    return custom(+tension);\n  };\n\n  return cardinal;\n}))(0);\n\nfunction CardinalClosed(context, tension) {\n  this._context = context;\n  this._k = (1 - tension) / 6;\n}\n\nCardinalClosed.prototype = {\n  areaStart: noop$2,\n  areaEnd: noop$2,\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =\n    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 1: {\n        this._context.moveTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 2: {\n        this._context.lineTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 3: {\n        this.point(this._x3, this._y3);\n        this.point(this._x4, this._y4);\n        this.point(this._x5, this._y5);\n        break;\n      }\n    }\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;\n      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;\n      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;\n      default: point$3(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar cardinalClosed = ((function custom(tension) {\n\n  function cardinal(context) {\n    return new CardinalClosed(context, tension);\n  }\n\n  cardinal.tension = function(tension) {\n    return custom(+tension);\n  };\n\n  return cardinal;\n}))(0);\n\nfunction CardinalOpen(context, tension) {\n  this._context = context;\n  this._k = (1 - tension) / 6;\n}\n\nCardinalOpen.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;\n      case 3: this._point = 4; // proceed\n      default: point$3(this, x, y); break;\n    }\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar cardinalOpen = ((function custom(tension) {\n\n  function cardinal(context) {\n    return new CardinalOpen(context, tension);\n  }\n\n  cardinal.tension = function(tension) {\n    return custom(+tension);\n  };\n\n  return cardinal;\n}))(0);\n\nfunction point$4(that, x, y) {\n  var x1 = that._x1,\n      y1 = that._y1,\n      x2 = that._x2,\n      y2 = that._y2;\n\n  if (that._l01_a > epsilon$3) {\n    var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,\n        n = 3 * that._l01_a * (that._l01_a + that._l12_a);\n    x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;\n    y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;\n  }\n\n  if (that._l23_a > epsilon$3) {\n    var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,\n        m = 3 * that._l23_a * (that._l23_a + that._l12_a);\n    x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;\n    y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;\n  }\n\n  that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);\n}\n\nfunction CatmullRom(context, alpha) {\n  this._context = context;\n  this._alpha = alpha;\n}\n\nCatmullRom.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._l01_a = this._l12_a = this._l23_a =\n    this._l01_2a = this._l12_2a = this._l23_2a =\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 2: this._context.lineTo(this._x2, this._y2); break;\n      case 3: this.point(this._x2, this._y2); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n\n    if (this._point) {\n      var x23 = this._x2 - x,\n          y23 = this._y2 - y;\n      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n    }\n\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; // proceed\n      default: point$4(this, x, y); break;\n    }\n\n    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar catmullRom = ((function custom(alpha) {\n\n  function catmullRom(context) {\n    return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);\n  }\n\n  catmullRom.alpha = function(alpha) {\n    return custom(+alpha);\n  };\n\n  return catmullRom;\n}))(0.5);\n\nfunction CatmullRomClosed(context, alpha) {\n  this._context = context;\n  this._alpha = alpha;\n}\n\nCatmullRomClosed.prototype = {\n  areaStart: noop$2,\n  areaEnd: noop$2,\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =\n    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;\n    this._l01_a = this._l12_a = this._l23_a =\n    this._l01_2a = this._l12_2a = this._l23_2a =\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 1: {\n        this._context.moveTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 2: {\n        this._context.lineTo(this._x3, this._y3);\n        this._context.closePath();\n        break;\n      }\n      case 3: {\n        this.point(this._x3, this._y3);\n        this.point(this._x4, this._y4);\n        this.point(this._x5, this._y5);\n        break;\n      }\n    }\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n\n    if (this._point) {\n      var x23 = this._x2 - x,\n          y23 = this._y2 - y;\n      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n    }\n\n    switch (this._point) {\n      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;\n      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;\n      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;\n      default: point$4(this, x, y); break;\n    }\n\n    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar catmullRomClosed = ((function custom(alpha) {\n\n  function catmullRom(context) {\n    return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);\n  }\n\n  catmullRom.alpha = function(alpha) {\n    return custom(+alpha);\n  };\n\n  return catmullRom;\n}))(0.5);\n\nfunction CatmullRomOpen(context, alpha) {\n  this._context = context;\n  this._alpha = alpha;\n}\n\nCatmullRomOpen.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 = this._x2 =\n    this._y0 = this._y1 = this._y2 = NaN;\n    this._l01_a = this._l12_a = this._l23_a =\n    this._l01_2a = this._l12_2a = this._l23_2a =\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n\n    if (this._point) {\n      var x23 = this._x2 - x,\n          y23 = this._y2 - y;\n      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n    }\n\n    switch (this._point) {\n      case 0: this._point = 1; break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;\n      case 3: this._point = 4; // proceed\n      default: point$4(this, x, y); break;\n    }\n\n    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n  }\n};\n\nvar catmullRomOpen = ((function custom(alpha) {\n\n  function catmullRom(context) {\n    return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);\n  }\n\n  catmullRom.alpha = function(alpha) {\n    return custom(+alpha);\n  };\n\n  return catmullRom;\n}))(0.5);\n\nfunction LinearClosed(context) {\n  this._context = context;\n}\n\nLinearClosed.prototype = {\n  areaStart: noop$2,\n  areaEnd: noop$2,\n  lineStart: function() {\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (this._point) this._context.closePath();\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    if (this._point) this._context.lineTo(x, y);\n    else this._point = 1, this._context.moveTo(x, y);\n  }\n};\n\nvar linearClosed = function(context) {\n  return new LinearClosed(context);\n};\n\nfunction sign$1(x) {\n  return x < 0 ? -1 : 1;\n}\n\n// Calculate the slopes of the tangents (Hermite-type interpolation) based on\n// the following paper: Steffen, M. 1990. A Simple Method for Monotonic\n// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.\n// NOV(II), P. 443, 1990.\nfunction slope3(that, x2, y2) {\n  var h0 = that._x1 - that._x0,\n      h1 = x2 - that._x1,\n      s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),\n      s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),\n      p = (s0 * h1 + s1 * h0) / (h0 + h1);\n  return (sign$1(s0) + sign$1(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;\n}\n\n// Calculate a one-sided slope.\nfunction slope2(that, t) {\n  var h = that._x1 - that._x0;\n  return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;\n}\n\n// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations\n// \"you can express cubic Hermite interpolation in terms of cubic Bézier curves\n// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1\".\nfunction point$5(that, t0, t1) {\n  var x0 = that._x0,\n      y0 = that._y0,\n      x1 = that._x1,\n      y1 = that._y1,\n      dx = (x1 - x0) / 3;\n  that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);\n}\n\nfunction MonotoneX(context) {\n  this._context = context;\n}\n\nMonotoneX.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x0 = this._x1 =\n    this._y0 = this._y1 =\n    this._t0 = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    switch (this._point) {\n      case 2: this._context.lineTo(this._x1, this._y1); break;\n      case 3: point$5(this, this._t0, slope2(this, this._t0)); break;\n    }\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    var t1 = NaN;\n\n    x = +x, y = +y;\n    if (x === this._x1 && y === this._y1) return; // Ignore coincident points.\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; break;\n      case 2: this._point = 3; point$5(this, slope2(this, t1 = slope3(this, x, y)), t1); break;\n      default: point$5(this, this._t0, t1 = slope3(this, x, y)); break;\n    }\n\n    this._x0 = this._x1, this._x1 = x;\n    this._y0 = this._y1, this._y1 = y;\n    this._t0 = t1;\n  }\n};\n\nfunction MonotoneY(context) {\n  this._context = new ReflectContext(context);\n}\n\n(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {\n  MonotoneX.prototype.point.call(this, y, x);\n};\n\nfunction ReflectContext(context) {\n  this._context = context;\n}\n\nReflectContext.prototype = {\n  moveTo: function(x, y) { this._context.moveTo(y, x); },\n  closePath: function() { this._context.closePath(); },\n  lineTo: function(x, y) { this._context.lineTo(y, x); },\n  bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }\n};\n\nfunction monotoneX(context) {\n  return new MonotoneX(context);\n}\n\nfunction monotoneY(context) {\n  return new MonotoneY(context);\n}\n\nfunction Natural(context) {\n  this._context = context;\n}\n\nNatural.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x = [];\n    this._y = [];\n  },\n  lineEnd: function() {\n    var x = this._x,\n        y = this._y,\n        n = x.length;\n\n    if (n) {\n      this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);\n      if (n === 2) {\n        this._context.lineTo(x[1], y[1]);\n      } else {\n        var px = controlPoints(x),\n            py = controlPoints(y);\n        for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {\n          this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);\n        }\n      }\n    }\n\n    if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();\n    this._line = 1 - this._line;\n    this._x = this._y = null;\n  },\n  point: function(x, y) {\n    this._x.push(+x);\n    this._y.push(+y);\n  }\n};\n\n// See https://www.particleincell.com/2012/bezier-splines/ for derivation.\nfunction controlPoints(x) {\n  var i,\n      n = x.length - 1,\n      m,\n      a = new Array(n),\n      b = new Array(n),\n      r = new Array(n);\n  a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];\n  for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];\n  a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];\n  for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];\n  a[n - 1] = r[n - 1] / b[n - 1];\n  for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];\n  b[n - 1] = (x[n] + a[n - 1]) / 2;\n  for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];\n  return [a, b];\n}\n\nvar natural = function(context) {\n  return new Natural(context);\n};\n\nfunction Step(context, t) {\n  this._context = context;\n  this._t = t;\n}\n\nStep.prototype = {\n  areaStart: function() {\n    this._line = 0;\n  },\n  areaEnd: function() {\n    this._line = NaN;\n  },\n  lineStart: function() {\n    this._x = this._y = NaN;\n    this._point = 0;\n  },\n  lineEnd: function() {\n    if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);\n    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n    if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;\n  },\n  point: function(x, y) {\n    x = +x, y = +y;\n    switch (this._point) {\n      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n      case 1: this._point = 2; // proceed\n      default: {\n        if (this._t <= 0) {\n          this._context.lineTo(this._x, y);\n          this._context.lineTo(x, y);\n        } else {\n          var x1 = this._x * (1 - this._t) + x * this._t;\n          this._context.lineTo(x1, this._y);\n          this._context.lineTo(x1, y);\n        }\n        break;\n      }\n    }\n    this._x = x, this._y = y;\n  }\n};\n\nvar step = function(context) {\n  return new Step(context, 0.5);\n};\n\nfunction stepBefore(context) {\n  return new Step(context, 0);\n}\n\nfunction stepAfter(context) {\n  return new Step(context, 1);\n}\n\nvar slice$5 = Array.prototype.slice;\n\nvar none$1 = function(series, order) {\n  if (!((n = series.length) > 1)) return;\n  for (var i = 1, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {\n    s0 = s1, s1 = series[order[i]];\n    for (var j = 0; j < m; ++j) {\n      s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];\n    }\n  }\n};\n\nvar none$2 = function(series) {\n  var n = series.length, o = new Array(n);\n  while (--n >= 0) o[n] = n;\n  return o;\n};\n\nfunction stackValue(d, key) {\n  return d[key];\n}\n\nvar stack = function() {\n  var keys = constant$10([]),\n      order = none$2,\n      offset = none$1,\n      value = stackValue;\n\n  function stack(data) {\n    var kz = keys.apply(this, arguments),\n        i,\n        m = data.length,\n        n = kz.length,\n        sz = new Array(n),\n        oz;\n\n    for (i = 0; i < n; ++i) {\n      for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {\n        si[j] = sij = [0, +value(data[j], ki, j, data)];\n        sij.data = data[j];\n      }\n      si.key = ki;\n    }\n\n    for (i = 0, oz = order(sz); i < n; ++i) {\n      sz[oz[i]].index = i;\n    }\n\n    offset(sz, oz);\n    return sz;\n  }\n\n  stack.keys = function(_) {\n    return arguments.length ? (keys = typeof _ === \"function\" ? _ : constant$10(slice$5.call(_)), stack) : keys;\n  };\n\n  stack.value = function(_) {\n    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant$10(+_), stack) : value;\n  };\n\n  stack.order = function(_) {\n    return arguments.length ? (order = _ == null ? none$2 : typeof _ === \"function\" ? _ : constant$10(slice$5.call(_)), stack) : order;\n  };\n\n  stack.offset = function(_) {\n    return arguments.length ? (offset = _ == null ? none$1 : _, stack) : offset;\n  };\n\n  return stack;\n};\n\nvar expand = function(series, order) {\n  if (!((n = series.length) > 0)) return;\n  for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {\n    for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;\n    if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;\n  }\n  none$1(series, order);\n};\n\nvar silhouette = function(series, order) {\n  if (!((n = series.length) > 0)) return;\n  for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {\n    for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;\n    s0[j][1] += s0[j][0] = -y / 2;\n  }\n  none$1(series, order);\n};\n\nvar wiggle = function(series, order) {\n  if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;\n  for (var y = 0, j = 1, s0, m, n; j < m; ++j) {\n    for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {\n      var si = series[order[i]],\n          sij0 = si[j][1] || 0,\n          sij1 = si[j - 1][1] || 0,\n          s3 = (sij0 - sij1) / 2;\n      for (var k = 0; k < i; ++k) {\n        var sk = series[order[k]],\n            skj0 = sk[j][1] || 0,\n            skj1 = sk[j - 1][1] || 0;\n        s3 += skj0 - skj1;\n      }\n      s1 += sij0, s2 += s3 * sij0;\n    }\n    s0[j - 1][1] += s0[j - 1][0] = y;\n    if (s1) y -= s2 / s1;\n  }\n  s0[j - 1][1] += s0[j - 1][0] = y;\n  none$1(series, order);\n};\n\nvar ascending$2 = function(series) {\n  var sums = series.map(sum$2);\n  return none$2(series).sort(function(a, b) { return sums[a] - sums[b]; });\n};\n\nfunction sum$2(series) {\n  var s = 0, i = -1, n = series.length, v;\n  while (++i < n) if (v = +series[i][1]) s += v;\n  return s;\n}\n\nvar descending$2 = function(series) {\n  return ascending$2(series).reverse();\n};\n\nvar insideOut = function(series) {\n  var n = series.length,\n      i,\n      j,\n      sums = series.map(sum$2),\n      order = none$2(series).sort(function(a, b) { return sums[b] - sums[a]; }),\n      top = 0,\n      bottom = 0,\n      tops = [],\n      bottoms = [];\n\n  for (i = 0; i < n; ++i) {\n    j = order[i];\n    if (top < bottom) {\n      top += sums[j];\n      tops.push(j);\n    } else {\n      bottom += sums[j];\n      bottoms.push(j);\n    }\n  }\n\n  return bottoms.reverse().concat(tops);\n};\n\nvar reverse = function(series) {\n  return none$2(series).reverse();\n};\n\nvar constant$11 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nfunction x$4(d) {\n  return d[0];\n}\n\nfunction y$4(d) {\n  return d[1];\n}\n\nfunction RedBlackTree() {\n  this._ = null; // root node\n}\n\nfunction RedBlackNode(node) {\n  node.U = // parent node\n  node.C = // color - true for red, false for black\n  node.L = // left node\n  node.R = // right node\n  node.P = // previous node\n  node.N = null; // next node\n}\n\nRedBlackTree.prototype = {\n  constructor: RedBlackTree,\n\n  insert: function(after, node) {\n    var parent, grandpa, uncle;\n\n    if (after) {\n      node.P = after;\n      node.N = after.N;\n      if (after.N) after.N.P = node;\n      after.N = node;\n      if (after.R) {\n        after = after.R;\n        while (after.L) after = after.L;\n        after.L = node;\n      } else {\n        after.R = node;\n      }\n      parent = after;\n    } else if (this._) {\n      after = RedBlackFirst(this._);\n      node.P = null;\n      node.N = after;\n      after.P = after.L = node;\n      parent = after;\n    } else {\n      node.P = node.N = null;\n      this._ = node;\n      parent = null;\n    }\n    node.L = node.R = null;\n    node.U = parent;\n    node.C = true;\n\n    after = node;\n    while (parent && parent.C) {\n      grandpa = parent.U;\n      if (parent === grandpa.L) {\n        uncle = grandpa.R;\n        if (uncle && uncle.C) {\n          parent.C = uncle.C = false;\n          grandpa.C = true;\n          after = grandpa;\n        } else {\n          if (after === parent.R) {\n            RedBlackRotateLeft(this, parent);\n            after = parent;\n            parent = after.U;\n          }\n          parent.C = false;\n          grandpa.C = true;\n          RedBlackRotateRight(this, grandpa);\n        }\n      } else {\n        uncle = grandpa.L;\n        if (uncle && uncle.C) {\n          parent.C = uncle.C = false;\n          grandpa.C = true;\n          after = grandpa;\n        } else {\n          if (after === parent.L) {\n            RedBlackRotateRight(this, parent);\n            after = parent;\n            parent = after.U;\n          }\n          parent.C = false;\n          grandpa.C = true;\n          RedBlackRotateLeft(this, grandpa);\n        }\n      }\n      parent = after.U;\n    }\n    this._.C = false;\n  },\n\n  remove: function(node) {\n    if (node.N) node.N.P = node.P;\n    if (node.P) node.P.N = node.N;\n    node.N = node.P = null;\n\n    var parent = node.U,\n        sibling,\n        left = node.L,\n        right = node.R,\n        next,\n        red;\n\n    if (!left) next = right;\n    else if (!right) next = left;\n    else next = RedBlackFirst(right);\n\n    if (parent) {\n      if (parent.L === node) parent.L = next;\n      else parent.R = next;\n    } else {\n      this._ = next;\n    }\n\n    if (left && right) {\n      red = next.C;\n      next.C = node.C;\n      next.L = left;\n      left.U = next;\n      if (next !== right) {\n        parent = next.U;\n        next.U = node.U;\n        node = next.R;\n        parent.L = node;\n        next.R = right;\n        right.U = next;\n      } else {\n        next.U = parent;\n        parent = next;\n        node = next.R;\n      }\n    } else {\n      red = node.C;\n      node = next;\n    }\n\n    if (node) node.U = parent;\n    if (red) return;\n    if (node && node.C) { node.C = false; return; }\n\n    do {\n      if (node === this._) break;\n      if (node === parent.L) {\n        sibling = parent.R;\n        if (sibling.C) {\n          sibling.C = false;\n          parent.C = true;\n          RedBlackRotateLeft(this, parent);\n          sibling = parent.R;\n        }\n        if ((sibling.L && sibling.L.C)\n            || (sibling.R && sibling.R.C)) {\n          if (!sibling.R || !sibling.R.C) {\n            sibling.L.C = false;\n            sibling.C = true;\n            RedBlackRotateRight(this, sibling);\n            sibling = parent.R;\n          }\n          sibling.C = parent.C;\n          parent.C = sibling.R.C = false;\n          RedBlackRotateLeft(this, parent);\n          node = this._;\n          break;\n        }\n      } else {\n        sibling = parent.L;\n        if (sibling.C) {\n          sibling.C = false;\n          parent.C = true;\n          RedBlackRotateRight(this, parent);\n          sibling = parent.L;\n        }\n        if ((sibling.L && sibling.L.C)\n          || (sibling.R && sibling.R.C)) {\n          if (!sibling.L || !sibling.L.C) {\n            sibling.R.C = false;\n            sibling.C = true;\n            RedBlackRotateLeft(this, sibling);\n            sibling = parent.L;\n          }\n          sibling.C = parent.C;\n          parent.C = sibling.L.C = false;\n          RedBlackRotateRight(this, parent);\n          node = this._;\n          break;\n        }\n      }\n      sibling.C = true;\n      node = parent;\n      parent = parent.U;\n    } while (!node.C);\n\n    if (node) node.C = false;\n  }\n};\n\nfunction RedBlackRotateLeft(tree, node) {\n  var p = node,\n      q = node.R,\n      parent = p.U;\n\n  if (parent) {\n    if (parent.L === p) parent.L = q;\n    else parent.R = q;\n  } else {\n    tree._ = q;\n  }\n\n  q.U = parent;\n  p.U = q;\n  p.R = q.L;\n  if (p.R) p.R.U = p;\n  q.L = p;\n}\n\nfunction RedBlackRotateRight(tree, node) {\n  var p = node,\n      q = node.L,\n      parent = p.U;\n\n  if (parent) {\n    if (parent.L === p) parent.L = q;\n    else parent.R = q;\n  } else {\n    tree._ = q;\n  }\n\n  q.U = parent;\n  p.U = q;\n  p.L = q.R;\n  if (p.L) p.L.U = p;\n  q.R = p;\n}\n\nfunction RedBlackFirst(node) {\n  while (node.L) node = node.L;\n  return node;\n}\n\nfunction createEdge(left, right, v0, v1) {\n  var edge = [null, null],\n      index = edges.push(edge) - 1;\n  edge.left = left;\n  edge.right = right;\n  if (v0) setEdgeEnd(edge, left, right, v0);\n  if (v1) setEdgeEnd(edge, right, left, v1);\n  cells[left.index].halfedges.push(index);\n  cells[right.index].halfedges.push(index);\n  return edge;\n}\n\nfunction createBorderEdge(left, v0, v1) {\n  var edge = [v0, v1];\n  edge.left = left;\n  return edge;\n}\n\nfunction setEdgeEnd(edge, left, right, vertex) {\n  if (!edge[0] && !edge[1]) {\n    edge[0] = vertex;\n    edge.left = left;\n    edge.right = right;\n  } else if (edge.left === right) {\n    edge[1] = vertex;\n  } else {\n    edge[0] = vertex;\n  }\n}\n\n// Liang–Barsky line clipping.\nfunction clipEdge(edge, x0, y0, x1, y1) {\n  var a = edge[0],\n      b = edge[1],\n      ax = a[0],\n      ay = a[1],\n      bx = b[0],\n      by = b[1],\n      t0 = 0,\n      t1 = 1,\n      dx = bx - ax,\n      dy = by - ay,\n      r;\n\n  r = x0 - ax;\n  if (!dx && r > 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dx > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = x1 - ax;\n  if (!dx && r < 0) return;\n  r /= dx;\n  if (dx < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dx > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  r = y0 - ay;\n  if (!dy && r > 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  } else if (dy > 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  }\n\n  r = y1 - ay;\n  if (!dy && r < 0) return;\n  r /= dy;\n  if (dy < 0) {\n    if (r > t1) return;\n    if (r > t0) t0 = r;\n  } else if (dy > 0) {\n    if (r < t0) return;\n    if (r < t1) t1 = r;\n  }\n\n  if (!(t0 > 0) && !(t1 < 1)) return true; // TODO Better check?\n\n  if (t0 > 0) edge[0] = [ax + t0 * dx, ay + t0 * dy];\n  if (t1 < 1) edge[1] = [ax + t1 * dx, ay + t1 * dy];\n  return true;\n}\n\nfunction connectEdge(edge, x0, y0, x1, y1) {\n  var v1 = edge[1];\n  if (v1) return true;\n\n  var v0 = edge[0],\n      left = edge.left,\n      right = edge.right,\n      lx = left[0],\n      ly = left[1],\n      rx = right[0],\n      ry = right[1],\n      fx = (lx + rx) / 2,\n      fy = (ly + ry) / 2,\n      fm,\n      fb;\n\n  if (ry === ly) {\n    if (fx < x0 || fx >= x1) return;\n    if (lx > rx) {\n      if (!v0) v0 = [fx, y0];\n      else if (v0[1] >= y1) return;\n      v1 = [fx, y1];\n    } else {\n      if (!v0) v0 = [fx, y1];\n      else if (v0[1] < y0) return;\n      v1 = [fx, y0];\n    }\n  } else {\n    fm = (lx - rx) / (ry - ly);\n    fb = fy - fm * fx;\n    if (fm < -1 || fm > 1) {\n      if (lx > rx) {\n        if (!v0) v0 = [(y0 - fb) / fm, y0];\n        else if (v0[1] >= y1) return;\n        v1 = [(y1 - fb) / fm, y1];\n      } else {\n        if (!v0) v0 = [(y1 - fb) / fm, y1];\n        else if (v0[1] < y0) return;\n        v1 = [(y0 - fb) / fm, y0];\n      }\n    } else {\n      if (ly < ry) {\n        if (!v0) v0 = [x0, fm * x0 + fb];\n        else if (v0[0] >= x1) return;\n        v1 = [x1, fm * x1 + fb];\n      } else {\n        if (!v0) v0 = [x1, fm * x1 + fb];\n        else if (v0[0] < x0) return;\n        v1 = [x0, fm * x0 + fb];\n      }\n    }\n  }\n\n  edge[0] = v0;\n  edge[1] = v1;\n  return true;\n}\n\nfunction clipEdges(x0, y0, x1, y1) {\n  var i = edges.length,\n      edge;\n\n  while (i--) {\n    if (!connectEdge(edge = edges[i], x0, y0, x1, y1)\n        || !clipEdge(edge, x0, y0, x1, y1)\n        || !(Math.abs(edge[0][0] - edge[1][0]) > epsilon$4\n            || Math.abs(edge[0][1] - edge[1][1]) > epsilon$4)) {\n      delete edges[i];\n    }\n  }\n}\n\nfunction createCell(site) {\n  return cells[site.index] = {\n    site: site,\n    halfedges: []\n  };\n}\n\nfunction cellHalfedgeAngle(cell, edge) {\n  var site = cell.site,\n      va = edge.left,\n      vb = edge.right;\n  if (site === vb) vb = va, va = site;\n  if (vb) return Math.atan2(vb[1] - va[1], vb[0] - va[0]);\n  if (site === va) va = edge[1], vb = edge[0];\n  else va = edge[0], vb = edge[1];\n  return Math.atan2(va[0] - vb[0], vb[1] - va[1]);\n}\n\nfunction cellHalfedgeStart(cell, edge) {\n  return edge[+(edge.left !== cell.site)];\n}\n\nfunction cellHalfedgeEnd(cell, edge) {\n  return edge[+(edge.left === cell.site)];\n}\n\nfunction sortCellHalfedges() {\n  for (var i = 0, n = cells.length, cell, halfedges, j, m; i < n; ++i) {\n    if ((cell = cells[i]) && (m = (halfedges = cell.halfedges).length)) {\n      var index = new Array(m),\n          array = new Array(m);\n      for (j = 0; j < m; ++j) index[j] = j, array[j] = cellHalfedgeAngle(cell, edges[halfedges[j]]);\n      index.sort(function(i, j) { return array[j] - array[i]; });\n      for (j = 0; j < m; ++j) array[j] = halfedges[index[j]];\n      for (j = 0; j < m; ++j) halfedges[j] = array[j];\n    }\n  }\n}\n\nfunction clipCells(x0, y0, x1, y1) {\n  var nCells = cells.length,\n      iCell,\n      cell,\n      site,\n      iHalfedge,\n      halfedges,\n      nHalfedges,\n      start,\n      startX,\n      startY,\n      end,\n      endX,\n      endY,\n      cover = true;\n\n  for (iCell = 0; iCell < nCells; ++iCell) {\n    if (cell = cells[iCell]) {\n      site = cell.site;\n      halfedges = cell.halfedges;\n      iHalfedge = halfedges.length;\n\n      // Remove any dangling clipped edges.\n      while (iHalfedge--) {\n        if (!edges[halfedges[iHalfedge]]) {\n          halfedges.splice(iHalfedge, 1);\n        }\n      }\n\n      // Insert any border edges as necessary.\n      iHalfedge = 0, nHalfedges = halfedges.length;\n      while (iHalfedge < nHalfedges) {\n        end = cellHalfedgeEnd(cell, edges[halfedges[iHalfedge]]), endX = end[0], endY = end[1];\n        start = cellHalfedgeStart(cell, edges[halfedges[++iHalfedge % nHalfedges]]), startX = start[0], startY = start[1];\n        if (Math.abs(endX - startX) > epsilon$4 || Math.abs(endY - startY) > epsilon$4) {\n          halfedges.splice(iHalfedge, 0, edges.push(createBorderEdge(site, end,\n              Math.abs(endX - x0) < epsilon$4 && y1 - endY > epsilon$4 ? [x0, Math.abs(startX - x0) < epsilon$4 ? startY : y1]\n              : Math.abs(endY - y1) < epsilon$4 && x1 - endX > epsilon$4 ? [Math.abs(startY - y1) < epsilon$4 ? startX : x1, y1]\n              : Math.abs(endX - x1) < epsilon$4 && endY - y0 > epsilon$4 ? [x1, Math.abs(startX - x1) < epsilon$4 ? startY : y0]\n              : Math.abs(endY - y0) < epsilon$4 && endX - x0 > epsilon$4 ? [Math.abs(startY - y0) < epsilon$4 ? startX : x0, y0]\n              : null)) - 1);\n          ++nHalfedges;\n        }\n      }\n\n      if (nHalfedges) cover = false;\n    }\n  }\n\n  // If there weren’t any edges, have the closest site cover the extent.\n  // It doesn’t matter which corner of the extent we measure!\n  if (cover) {\n    var dx, dy, d2, dc = Infinity;\n\n    for (iCell = 0, cover = null; iCell < nCells; ++iCell) {\n      if (cell = cells[iCell]) {\n        site = cell.site;\n        dx = site[0] - x0;\n        dy = site[1] - y0;\n        d2 = dx * dx + dy * dy;\n        if (d2 < dc) dc = d2, cover = cell;\n      }\n    }\n\n    if (cover) {\n      var v00 = [x0, y0], v01 = [x0, y1], v11 = [x1, y1], v10 = [x1, y0];\n      cover.halfedges.push(\n        edges.push(createBorderEdge(site = cover.site, v00, v01)) - 1,\n        edges.push(createBorderEdge(site, v01, v11)) - 1,\n        edges.push(createBorderEdge(site, v11, v10)) - 1,\n        edges.push(createBorderEdge(site, v10, v00)) - 1\n      );\n    }\n  }\n\n  // Lastly delete any cells with no edges; these were entirely clipped.\n  for (iCell = 0; iCell < nCells; ++iCell) {\n    if (cell = cells[iCell]) {\n      if (!cell.halfedges.length) {\n        delete cells[iCell];\n      }\n    }\n  }\n}\n\nvar circlePool = [];\n\nvar firstCircle;\n\nfunction Circle() {\n  RedBlackNode(this);\n  this.x =\n  this.y =\n  this.arc =\n  this.site =\n  this.cy = null;\n}\n\nfunction attachCircle(arc) {\n  var lArc = arc.P,\n      rArc = arc.N;\n\n  if (!lArc || !rArc) return;\n\n  var lSite = lArc.site,\n      cSite = arc.site,\n      rSite = rArc.site;\n\n  if (lSite === rSite) return;\n\n  var bx = cSite[0],\n      by = cSite[1],\n      ax = lSite[0] - bx,\n      ay = lSite[1] - by,\n      cx = rSite[0] - bx,\n      cy = rSite[1] - by;\n\n  var d = 2 * (ax * cy - ay * cx);\n  if (d >= -epsilon2$2) return;\n\n  var ha = ax * ax + ay * ay,\n      hc = cx * cx + cy * cy,\n      x = (cy * ha - ay * hc) / d,\n      y = (ax * hc - cx * ha) / d;\n\n  var circle = circlePool.pop() || new Circle;\n  circle.arc = arc;\n  circle.site = cSite;\n  circle.x = x + bx;\n  circle.y = (circle.cy = y + by) + Math.sqrt(x * x + y * y); // y bottom\n\n  arc.circle = circle;\n\n  var before = null,\n      node = circles._;\n\n  while (node) {\n    if (circle.y < node.y || (circle.y === node.y && circle.x <= node.x)) {\n      if (node.L) node = node.L;\n      else { before = node.P; break; }\n    } else {\n      if (node.R) node = node.R;\n      else { before = node; break; }\n    }\n  }\n\n  circles.insert(before, circle);\n  if (!before) firstCircle = circle;\n}\n\nfunction detachCircle(arc) {\n  var circle = arc.circle;\n  if (circle) {\n    if (!circle.P) firstCircle = circle.N;\n    circles.remove(circle);\n    circlePool.push(circle);\n    RedBlackNode(circle);\n    arc.circle = null;\n  }\n}\n\nvar beachPool = [];\n\nfunction Beach() {\n  RedBlackNode(this);\n  this.edge =\n  this.site =\n  this.circle = null;\n}\n\nfunction createBeach(site) {\n  var beach = beachPool.pop() || new Beach;\n  beach.site = site;\n  return beach;\n}\n\nfunction detachBeach(beach) {\n  detachCircle(beach);\n  beaches.remove(beach);\n  beachPool.push(beach);\n  RedBlackNode(beach);\n}\n\nfunction removeBeach(beach) {\n  var circle = beach.circle,\n      x = circle.x,\n      y = circle.cy,\n      vertex = [x, y],\n      previous = beach.P,\n      next = beach.N,\n      disappearing = [beach];\n\n  detachBeach(beach);\n\n  var lArc = previous;\n  while (lArc.circle\n      && Math.abs(x - lArc.circle.x) < epsilon$4\n      && Math.abs(y - lArc.circle.cy) < epsilon$4) {\n    previous = lArc.P;\n    disappearing.unshift(lArc);\n    detachBeach(lArc);\n    lArc = previous;\n  }\n\n  disappearing.unshift(lArc);\n  detachCircle(lArc);\n\n  var rArc = next;\n  while (rArc.circle\n      && Math.abs(x - rArc.circle.x) < epsilon$4\n      && Math.abs(y - rArc.circle.cy) < epsilon$4) {\n    next = rArc.N;\n    disappearing.push(rArc);\n    detachBeach(rArc);\n    rArc = next;\n  }\n\n  disappearing.push(rArc);\n  detachCircle(rArc);\n\n  var nArcs = disappearing.length,\n      iArc;\n  for (iArc = 1; iArc < nArcs; ++iArc) {\n    rArc = disappearing[iArc];\n    lArc = disappearing[iArc - 1];\n    setEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex);\n  }\n\n  lArc = disappearing[0];\n  rArc = disappearing[nArcs - 1];\n  rArc.edge = createEdge(lArc.site, rArc.site, null, vertex);\n\n  attachCircle(lArc);\n  attachCircle(rArc);\n}\n\nfunction addBeach(site) {\n  var x = site[0],\n      directrix = site[1],\n      lArc,\n      rArc,\n      dxl,\n      dxr,\n      node = beaches._;\n\n  while (node) {\n    dxl = leftBreakPoint(node, directrix) - x;\n    if (dxl > epsilon$4) node = node.L; else {\n      dxr = x - rightBreakPoint(node, directrix);\n      if (dxr > epsilon$4) {\n        if (!node.R) {\n          lArc = node;\n          break;\n        }\n        node = node.R;\n      } else {\n        if (dxl > -epsilon$4) {\n          lArc = node.P;\n          rArc = node;\n        } else if (dxr > -epsilon$4) {\n          lArc = node;\n          rArc = node.N;\n        } else {\n          lArc = rArc = node;\n        }\n        break;\n      }\n    }\n  }\n\n  createCell(site);\n  var newArc = createBeach(site);\n  beaches.insert(lArc, newArc);\n\n  if (!lArc && !rArc) return;\n\n  if (lArc === rArc) {\n    detachCircle(lArc);\n    rArc = createBeach(lArc.site);\n    beaches.insert(newArc, rArc);\n    newArc.edge = rArc.edge = createEdge(lArc.site, newArc.site);\n    attachCircle(lArc);\n    attachCircle(rArc);\n    return;\n  }\n\n  if (!rArc) { // && lArc\n    newArc.edge = createEdge(lArc.site, newArc.site);\n    return;\n  }\n\n  // else lArc !== rArc\n  detachCircle(lArc);\n  detachCircle(rArc);\n\n  var lSite = lArc.site,\n      ax = lSite[0],\n      ay = lSite[1],\n      bx = site[0] - ax,\n      by = site[1] - ay,\n      rSite = rArc.site,\n      cx = rSite[0] - ax,\n      cy = rSite[1] - ay,\n      d = 2 * (bx * cy - by * cx),\n      hb = bx * bx + by * by,\n      hc = cx * cx + cy * cy,\n      vertex = [(cy * hb - by * hc) / d + ax, (bx * hc - cx * hb) / d + ay];\n\n  setEdgeEnd(rArc.edge, lSite, rSite, vertex);\n  newArc.edge = createEdge(lSite, site, null, vertex);\n  rArc.edge = createEdge(site, rSite, null, vertex);\n  attachCircle(lArc);\n  attachCircle(rArc);\n}\n\nfunction leftBreakPoint(arc, directrix) {\n  var site = arc.site,\n      rfocx = site[0],\n      rfocy = site[1],\n      pby2 = rfocy - directrix;\n\n  if (!pby2) return rfocx;\n\n  var lArc = arc.P;\n  if (!lArc) return -Infinity;\n\n  site = lArc.site;\n  var lfocx = site[0],\n      lfocy = site[1],\n      plby2 = lfocy - directrix;\n\n  if (!plby2) return lfocx;\n\n  var hl = lfocx - rfocx,\n      aby2 = 1 / pby2 - 1 / plby2,\n      b = hl / plby2;\n\n  if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx;\n\n  return (rfocx + lfocx) / 2;\n}\n\nfunction rightBreakPoint(arc, directrix) {\n  var rArc = arc.N;\n  if (rArc) return leftBreakPoint(rArc, directrix);\n  var site = arc.site;\n  return site[1] === directrix ? site[0] : Infinity;\n}\n\nvar epsilon$4 = 1e-6;\nvar epsilon2$2 = 1e-12;\nvar beaches;\nvar cells;\nvar circles;\nvar edges;\n\nfunction triangleArea(a, b, c) {\n  return (a[0] - c[0]) * (b[1] - a[1]) - (a[0] - b[0]) * (c[1] - a[1]);\n}\n\nfunction lexicographic(a, b) {\n  return b[1] - a[1]\n      || b[0] - a[0];\n}\n\nfunction Diagram(sites, extent) {\n  var site = sites.sort(lexicographic).pop(),\n      x,\n      y,\n      circle;\n\n  edges = [];\n  cells = new Array(sites.length);\n  beaches = new RedBlackTree;\n  circles = new RedBlackTree;\n\n  while (true) {\n    circle = firstCircle;\n    if (site && (!circle || site[1] < circle.y || (site[1] === circle.y && site[0] < circle.x))) {\n      if (site[0] !== x || site[1] !== y) {\n        addBeach(site);\n        x = site[0], y = site[1];\n      }\n      site = sites.pop();\n    } else if (circle) {\n      removeBeach(circle.arc);\n    } else {\n      break;\n    }\n  }\n\n  sortCellHalfedges();\n\n  if (extent) {\n    var x0 = +extent[0][0],\n        y0 = +extent[0][1],\n        x1 = +extent[1][0],\n        y1 = +extent[1][1];\n    clipEdges(x0, y0, x1, y1);\n    clipCells(x0, y0, x1, y1);\n  }\n\n  this.edges = edges;\n  this.cells = cells;\n\n  beaches =\n  circles =\n  edges =\n  cells = null;\n}\n\nDiagram.prototype = {\n  constructor: Diagram,\n\n  polygons: function() {\n    var edges = this.edges;\n\n    return this.cells.map(function(cell) {\n      var polygon = cell.halfedges.map(function(i) { return cellHalfedgeStart(cell, edges[i]); });\n      polygon.data = cell.site.data;\n      return polygon;\n    });\n  },\n\n  triangles: function() {\n    var triangles = [],\n        edges = this.edges;\n\n    this.cells.forEach(function(cell, i) {\n      if (!(m = (halfedges = cell.halfedges).length)) return;\n      var site = cell.site,\n          halfedges,\n          j = -1,\n          m,\n          s0,\n          e1 = edges[halfedges[m - 1]],\n          s1 = e1.left === site ? e1.right : e1.left;\n\n      while (++j < m) {\n        s0 = s1;\n        e1 = edges[halfedges[j]];\n        s1 = e1.left === site ? e1.right : e1.left;\n        if (s0 && s1 && i < s0.index && i < s1.index && triangleArea(site, s0, s1) < 0) {\n          triangles.push([site.data, s0.data, s1.data]);\n        }\n      }\n    });\n\n    return triangles;\n  },\n\n  links: function() {\n    return this.edges.filter(function(edge) {\n      return edge.right;\n    }).map(function(edge) {\n      return {\n        source: edge.left.data,\n        target: edge.right.data\n      };\n    });\n  },\n\n  find: function(x, y, radius) {\n    var that = this, i0, i1 = that._found || 0, n = that.cells.length, cell;\n\n    // Use the previously-found cell, or start with an arbitrary one.\n    while (!(cell = that.cells[i1])) if (++i1 >= n) return null;\n    var dx = x - cell.site[0], dy = y - cell.site[1], d2 = dx * dx + dy * dy;\n\n    // Traverse the half-edges to find a closer cell, if any.\n    do {\n      cell = that.cells[i0 = i1], i1 = null;\n      cell.halfedges.forEach(function(e) {\n        var edge = that.edges[e], v = edge.left;\n        if ((v === cell.site || !v) && !(v = edge.right)) return;\n        var vx = x - v[0], vy = y - v[1], v2 = vx * vx + vy * vy;\n        if (v2 < d2) d2 = v2, i1 = v.index;\n      });\n    } while (i1 !== null);\n\n    that._found = i0;\n\n    return radius == null || d2 <= radius * radius ? cell.site : null;\n  }\n};\n\nvar voronoi = function() {\n  var x$$1 = x$4,\n      y$$1 = y$4,\n      extent = null;\n\n  function voronoi(data) {\n    return new Diagram(data.map(function(d, i) {\n      var s = [Math.round(x$$1(d, i, data) / epsilon$4) * epsilon$4, Math.round(y$$1(d, i, data) / epsilon$4) * epsilon$4];\n      s.index = i;\n      s.data = d;\n      return s;\n    }), extent);\n  }\n\n  voronoi.polygons = function(data) {\n    return voronoi(data).polygons();\n  };\n\n  voronoi.links = function(data) {\n    return voronoi(data).links();\n  };\n\n  voronoi.triangles = function(data) {\n    return voronoi(data).triangles();\n  };\n\n  voronoi.x = function(_) {\n    return arguments.length ? (x$$1 = typeof _ === \"function\" ? _ : constant$11(+_), voronoi) : x$$1;\n  };\n\n  voronoi.y = function(_) {\n    return arguments.length ? (y$$1 = typeof _ === \"function\" ? _ : constant$11(+_), voronoi) : y$$1;\n  };\n\n  voronoi.extent = function(_) {\n    return arguments.length ? (extent = _ == null ? null : [[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]], voronoi) : extent && [[extent[0][0], extent[0][1]], [extent[1][0], extent[1][1]]];\n  };\n\n  voronoi.size = function(_) {\n    return arguments.length ? (extent = _ == null ? null : [[0, 0], [+_[0], +_[1]]], voronoi) : extent && [extent[1][0] - extent[0][0], extent[1][1] - extent[0][1]];\n  };\n\n  return voronoi;\n};\n\nvar constant$12 = function(x) {\n  return function() {\n    return x;\n  };\n};\n\nfunction ZoomEvent(target, type, transform) {\n  this.target = target;\n  this.type = type;\n  this.transform = transform;\n}\n\nfunction Transform(k, x, y) {\n  this.k = k;\n  this.x = x;\n  this.y = y;\n}\n\nTransform.prototype = {\n  constructor: Transform,\n  scale: function(k) {\n    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);\n  },\n  translate: function(x, y) {\n    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);\n  },\n  apply: function(point) {\n    return [point[0] * this.k + this.x, point[1] * this.k + this.y];\n  },\n  applyX: function(x) {\n    return x * this.k + this.x;\n  },\n  applyY: function(y) {\n    return y * this.k + this.y;\n  },\n  invert: function(location) {\n    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];\n  },\n  invertX: function(x) {\n    return (x - this.x) / this.k;\n  },\n  invertY: function(y) {\n    return (y - this.y) / this.k;\n  },\n  rescaleX: function(x) {\n    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));\n  },\n  rescaleY: function(y) {\n    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));\n  },\n  toString: function() {\n    return \"translate(\" + this.x + \",\" + this.y + \") scale(\" + this.k + \")\";\n  }\n};\n\nvar identity$8 = new Transform(1, 0, 0);\n\ntransform$1.prototype = Transform.prototype;\n\nfunction transform$1(node) {\n  return node.__zoom || identity$8;\n}\n\nfunction nopropagation$2() {\n  exports.event.stopImmediatePropagation();\n}\n\nvar noevent$2 = function() {\n  exports.event.preventDefault();\n  exports.event.stopImmediatePropagation();\n};\n\n// Ignore right-click, since that should open the context menu.\nfunction defaultFilter$2() {\n  return !exports.event.button;\n}\n\nfunction defaultExtent$1() {\n  var e = this, w, h;\n  if (e instanceof SVGElement) {\n    e = e.ownerSVGElement || e;\n    w = e.width.baseVal.value;\n    h = e.height.baseVal.value;\n  } else {\n    w = e.clientWidth;\n    h = e.clientHeight;\n  }\n  return [[0, 0], [w, h]];\n}\n\nfunction defaultTransform() {\n  return this.__zoom || identity$8;\n}\n\nvar zoom = function() {\n  var filter = defaultFilter$2,\n      extent = defaultExtent$1,\n      k0 = 0,\n      k1 = Infinity,\n      x0 = -k1,\n      x1 = k1,\n      y0 = x0,\n      y1 = x1,\n      duration = 250,\n      interpolate$$1 = interpolateZoom,\n      gestures = [],\n      listeners = dispatch(\"start\", \"zoom\", \"end\"),\n      touchstarting,\n      touchending,\n      touchDelay = 500,\n      wheelDelay = 150;\n\n  function zoom(selection$$1) {\n    selection$$1\n        .on(\"wheel.zoom\", wheeled)\n        .on(\"mousedown.zoom\", mousedowned)\n        .on(\"dblclick.zoom\", dblclicked)\n        .on(\"touchstart.zoom\", touchstarted)\n        .on(\"touchmove.zoom\", touchmoved)\n        .on(\"touchend.zoom touchcancel.zoom\", touchended)\n        .style(\"-webkit-tap-highlight-color\", \"rgba(0,0,0,0)\")\n        .property(\"__zoom\", defaultTransform);\n  }\n\n  zoom.transform = function(collection, transform) {\n    var selection$$1 = collection.selection ? collection.selection() : collection;\n    selection$$1.property(\"__zoom\", defaultTransform);\n    if (collection !== selection$$1) {\n      schedule(collection, transform);\n    } else {\n      selection$$1.interrupt().each(function() {\n        gesture(this, arguments)\n            .start()\n            .zoom(null, typeof transform === \"function\" ? transform.apply(this, arguments) : transform)\n            .end();\n      });\n    }\n  };\n\n  zoom.scaleBy = function(selection$$1, k) {\n    zoom.scaleTo(selection$$1, function() {\n      var k0 = this.__zoom.k,\n          k1 = typeof k === \"function\" ? k.apply(this, arguments) : k;\n      return k0 * k1;\n    });\n  };\n\n  zoom.scaleTo = function(selection$$1, k) {\n    zoom.transform(selection$$1, function() {\n      var e = extent.apply(this, arguments),\n          t0 = this.__zoom,\n          p0 = centroid(e),\n          p1 = t0.invert(p0),\n          k1 = typeof k === \"function\" ? k.apply(this, arguments) : k;\n      return constrain(translate(scale(t0, k1), p0, p1), e);\n    });\n  };\n\n  zoom.translateBy = function(selection$$1, x, y) {\n    zoom.transform(selection$$1, function() {\n      return constrain(this.__zoom.translate(\n        typeof x === \"function\" ? x.apply(this, arguments) : x,\n        typeof y === \"function\" ? y.apply(this, arguments) : y\n      ), extent.apply(this, arguments));\n    });\n  };\n\n  function scale(transform, k) {\n    k = Math.max(k0, Math.min(k1, k));\n    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);\n  }\n\n  function translate(transform, p0, p1) {\n    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;\n    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);\n  }\n\n  function constrain(transform, extent) {\n    var dx0 = transform.invertX(extent[0][0]) - x0,\n        dx1 = transform.invertX(extent[1][0]) - x1,\n        dy0 = transform.invertY(extent[0][1]) - y0,\n        dy1 = transform.invertY(extent[1][1]) - y1;\n    return transform.translate(\n      dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),\n      dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)\n    );\n  }\n\n  function centroid(extent) {\n    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];\n  }\n\n  function schedule(transition$$1, transform, center) {\n    transition$$1\n        .on(\"start.zoom\", function() { gesture(this, arguments).start(); })\n        .on(\"interrupt.zoom end.zoom\", function() { gesture(this, arguments).end(); })\n        .tween(\"zoom\", function() {\n          var that = this,\n              args = arguments,\n              g = gesture(that, args),\n              e = extent.apply(that, args),\n              p = center || centroid(e),\n              w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),\n              a = that.__zoom,\n              b = typeof transform === \"function\" ? transform.apply(that, args) : transform,\n              i = interpolate$$1(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));\n          return function(t) {\n            if (t === 1) t = b; // Avoid rounding error on end.\n            else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }\n            g.zoom(null, t);\n          };\n        });\n  }\n\n  function gesture(that, args) {\n    for (var i = 0, n = gestures.length, g; i < n; ++i) {\n      if ((g = gestures[i]).that === that) {\n        return g;\n      }\n    }\n    return new Gesture(that, args);\n  }\n\n  function Gesture(that, args) {\n    this.that = that;\n    this.args = args;\n    this.index = -1;\n    this.active = 0;\n    this.extent = extent.apply(that, args);\n  }\n\n  Gesture.prototype = {\n    start: function() {\n      if (++this.active === 1) {\n        this.index = gestures.push(this) - 1;\n        this.emit(\"start\");\n      }\n      return this;\n    },\n    zoom: function(key, transform) {\n      if (this.mouse && key !== \"mouse\") this.mouse[1] = transform.invert(this.mouse[0]);\n      if (this.touch0 && key !== \"touch\") this.touch0[1] = transform.invert(this.touch0[0]);\n      if (this.touch1 && key !== \"touch\") this.touch1[1] = transform.invert(this.touch1[0]);\n      this.that.__zoom = transform;\n      this.emit(\"zoom\");\n      return this;\n    },\n    end: function() {\n      if (--this.active === 0) {\n        gestures.splice(this.index, 1);\n        this.index = -1;\n        this.emit(\"end\");\n      }\n      return this;\n    },\n    emit: function(type) {\n      customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);\n    }\n  };\n\n  function wheeled() {\n    if (!filter.apply(this, arguments)) return;\n    var g = gesture(this, arguments),\n        t = this.__zoom,\n        k = Math.max(k0, Math.min(k1, t.k * Math.pow(2, -exports.event.deltaY * (exports.event.deltaMode ? 120 : 1) / 500))),\n        p = mouse(this);\n\n    // If the mouse is in the same location as before, reuse it.\n    // If there were recent wheel events, reset the wheel idle timeout.\n    if (g.wheel) {\n      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {\n        g.mouse[1] = t.invert(g.mouse[0] = p);\n      }\n      clearTimeout(g.wheel);\n    }\n\n    // If this wheel event won’t trigger a transform change, ignore it.\n    else if (t.k === k) return;\n\n    // Otherwise, capture the mouse point and location at the start.\n    else {\n      g.mouse = [p, t.invert(p)];\n      interrupt(this);\n      g.start();\n    }\n\n    noevent$2();\n    g.wheel = setTimeout(wheelidled, wheelDelay);\n    g.zoom(\"mouse\", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent));\n\n    function wheelidled() {\n      g.wheel = null;\n      g.end();\n    }\n  }\n\n  function mousedowned() {\n    if (touchending || !filter.apply(this, arguments)) return;\n    var g = gesture(this, arguments),\n        v = select(exports.event.view).on(\"mousemove.zoom\", mousemoved, true).on(\"mouseup.zoom\", mouseupped, true),\n        p = mouse(this);\n\n    dragDisable(exports.event.view);\n    nopropagation$2();\n    g.mouse = [p, this.__zoom.invert(p)];\n    interrupt(this);\n    g.start();\n\n    function mousemoved() {\n      noevent$2();\n      g.moved = true;\n      g.zoom(\"mouse\", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent));\n    }\n\n    function mouseupped() {\n      v.on(\"mousemove.zoom mouseup.zoom\", null);\n      yesdrag(exports.event.view, g.moved);\n      noevent$2();\n      g.end();\n    }\n  }\n\n  function dblclicked() {\n    if (!filter.apply(this, arguments)) return;\n    var t0 = this.__zoom,\n        p0 = mouse(this),\n        p1 = t0.invert(p0),\n        k1 = t0.k * (exports.event.shiftKey ? 0.5 : 2),\n        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments));\n\n    noevent$2();\n    if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0);\n    else select(this).call(zoom.transform, t1);\n  }\n\n  function touchstarted() {\n    if (!filter.apply(this, arguments)) return;\n    var g = gesture(this, arguments),\n        touches$$1 = exports.event.changedTouches,\n        started,\n        n = touches$$1.length, i, t, p;\n\n    nopropagation$2();\n    for (i = 0; i < n; ++i) {\n      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);\n      p = [p, this.__zoom.invert(p), t.identifier];\n      if (!g.touch0) g.touch0 = p, started = true;\n      else if (!g.touch1) g.touch1 = p;\n    }\n\n    // If this is a dbltap, reroute to the (optional) dblclick.zoom handler.\n    if (touchstarting) {\n      touchstarting = clearTimeout(touchstarting);\n      if (!g.touch1) {\n        g.end();\n        p = select(this).on(\"dblclick.zoom\");\n        if (p) p.apply(this, arguments);\n        return;\n      }\n    }\n\n    if (started) {\n      touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay);\n      interrupt(this);\n      g.start();\n    }\n  }\n\n  function touchmoved() {\n    var g = gesture(this, arguments),\n        touches$$1 = exports.event.changedTouches,\n        n = touches$$1.length, i, t, p, l;\n\n    noevent$2();\n    if (touchstarting) touchstarting = clearTimeout(touchstarting);\n    for (i = 0; i < n; ++i) {\n      t = touches$$1[i], p = touch(this, touches$$1, t.identifier);\n      if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;\n      else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;\n    }\n    t = g.that.__zoom;\n    if (g.touch1) {\n      var p0 = g.touch0[0], l0 = g.touch0[1],\n          p1 = g.touch1[0], l1 = g.touch1[1],\n          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,\n          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;\n      t = scale(t, Math.sqrt(dp / dl));\n      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];\n      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];\n    }\n    else if (g.touch0) p = g.touch0[0], l = g.touch0[1];\n    else return;\n    g.zoom(\"touch\", constrain(translate(t, p, l), g.extent));\n  }\n\n  function touchended() {\n    var g = gesture(this, arguments),\n        touches$$1 = exports.event.changedTouches,\n        n = touches$$1.length, i, t;\n\n    nopropagation$2();\n    if (touchending) clearTimeout(touchending);\n    touchending = setTimeout(function() { touchending = null; }, touchDelay);\n    for (i = 0; i < n; ++i) {\n      t = touches$$1[i];\n      if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;\n      else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;\n    }\n    if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;\n    if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);\n    else g.end();\n  }\n\n  zoom.filter = function(_) {\n    return arguments.length ? (filter = typeof _ === \"function\" ? _ : constant$12(!!_), zoom) : filter;\n  };\n\n  zoom.extent = function(_) {\n    return arguments.length ? (extent = typeof _ === \"function\" ? _ : constant$12([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;\n  };\n\n  zoom.scaleExtent = function(_) {\n    return arguments.length ? (k0 = +_[0], k1 = +_[1], zoom) : [k0, k1];\n  };\n\n  zoom.translateExtent = function(_) {\n    return arguments.length ? (x0 = +_[0][0], x1 = +_[1][0], y0 = +_[0][1], y1 = +_[1][1], zoom) : [[x0, y0], [x1, y1]];\n  };\n\n  zoom.duration = function(_) {\n    return arguments.length ? (duration = +_, zoom) : duration;\n  };\n\n  zoom.interpolate = function(_) {\n    return arguments.length ? (interpolate$$1 = _, zoom) : interpolate$$1;\n  };\n\n  zoom.on = function() {\n    var value = listeners.on.apply(listeners, arguments);\n    return value === listeners ? zoom : value;\n  };\n\n  return zoom;\n};\n\nexports.version = version;\nexports.bisect = bisectRight;\nexports.bisectRight = bisectRight;\nexports.bisectLeft = bisectLeft;\nexports.ascending = ascending;\nexports.bisector = bisector;\nexports.cross = cross;\nexports.descending = descending;\nexports.deviation = deviation;\nexports.extent = extent;\nexports.histogram = histogram;\nexports.thresholdFreedmanDiaconis = freedmanDiaconis;\nexports.thresholdScott = scott;\nexports.thresholdSturges = sturges;\nexports.max = max;\nexports.mean = mean;\nexports.median = median;\nexports.merge = merge;\nexports.min = min;\nexports.pairs = pairs;\nexports.permute = permute;\nexports.quantile = threshold;\nexports.range = sequence;\nexports.scan = scan;\nexports.shuffle = shuffle;\nexports.sum = sum;\nexports.ticks = ticks;\nexports.tickStep = tickStep;\nexports.transpose = transpose;\nexports.variance = variance;\nexports.zip = zip;\nexports.axisTop = axisTop;\nexports.axisRight = axisRight;\nexports.axisBottom = axisBottom;\nexports.axisLeft = axisLeft;\nexports.brush = brush;\nexports.brushX = brushX;\nexports.brushY = brushY;\nexports.brushSelection = brushSelection;\nexports.chord = chord;\nexports.ribbon = ribbon;\nexports.nest = nest;\nexports.set = set$2;\nexports.map = map$1;\nexports.keys = keys;\nexports.values = values;\nexports.entries = entries;\nexports.color = color;\nexports.rgb = rgb;\nexports.hsl = hsl;\nexports.lab = lab;\nexports.hcl = hcl;\nexports.cubehelix = cubehelix;\nexports.dispatch = dispatch;\nexports.drag = drag;\nexports.dragDisable = dragDisable;\nexports.dragEnable = yesdrag;\nexports.dsvFormat = dsv;\nexports.csvParse = csvParse;\nexports.csvParseRows = csvParseRows;\nexports.csvFormat = csvFormat;\nexports.csvFormatRows = csvFormatRows;\nexports.tsvParse = tsvParse;\nexports.tsvParseRows = tsvParseRows;\nexports.tsvFormat = tsvFormat;\nexports.tsvFormatRows = tsvFormatRows;\nexports.easeLinear = linear$1;\nexports.easeQuad = quadInOut;\nexports.easeQuadIn = quadIn;\nexports.easeQuadOut = quadOut;\nexports.easeQuadInOut = quadInOut;\nexports.easeCubic = cubicInOut;\nexports.easeCubicIn = cubicIn;\nexports.easeCubicOut = cubicOut;\nexports.easeCubicInOut = cubicInOut;\nexports.easePoly = polyInOut;\nexports.easePolyIn = polyIn;\nexports.easePolyOut = polyOut;\nexports.easePolyInOut = polyInOut;\nexports.easeSin = sinInOut;\nexports.easeSinIn = sinIn;\nexports.easeSinOut = sinOut;\nexports.easeSinInOut = sinInOut;\nexports.easeExp = expInOut;\nexports.easeExpIn = expIn;\nexports.easeExpOut = expOut;\nexports.easeExpInOut = expInOut;\nexports.easeCircle = circleInOut;\nexports.easeCircleIn = circleIn;\nexports.easeCircleOut = circleOut;\nexports.easeCircleInOut = circleInOut;\nexports.easeBounce = bounceOut;\nexports.easeBounceIn = bounceIn;\nexports.easeBounceOut = bounceOut;\nexports.easeBounceInOut = bounceInOut;\nexports.easeBack = backInOut;\nexports.easeBackIn = backIn;\nexports.easeBackOut = backOut;\nexports.easeBackInOut = backInOut;\nexports.easeElastic = elasticOut;\nexports.easeElasticIn = elasticIn;\nexports.easeElasticOut = elasticOut;\nexports.easeElasticInOut = elasticInOut;\nexports.forceCenter = center$1;\nexports.forceCollide = collide;\nexports.forceLink = link;\nexports.forceManyBody = manyBody;\nexports.forceSimulation = simulation;\nexports.forceX = x$2;\nexports.forceY = y$2;\nexports.formatDefaultLocale = defaultLocale;\nexports.formatLocale = formatLocale;\nexports.formatSpecifier = formatSpecifier;\nexports.precisionFixed = precisionFixed;\nexports.precisionPrefix = precisionPrefix;\nexports.precisionRound = precisionRound;\nexports.geoArea = area;\nexports.geoBounds = bounds;\nexports.geoCentroid = centroid;\nexports.geoCircle = circle;\nexports.geoClipExtent = extent$1;\nexports.geoContains = contains;\nexports.geoDistance = distance;\nexports.geoGraticule = graticule;\nexports.geoGraticule10 = graticule10;\nexports.geoInterpolate = interpolate$1;\nexports.geoLength = length$1;\nexports.geoPath = index$1;\nexports.geoAlbers = albers;\nexports.geoAlbersUsa = albersUsa;\nexports.geoAzimuthalEqualArea = azimuthalEqualArea;\nexports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;\nexports.geoAzimuthalEquidistant = azimuthalEquidistant;\nexports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;\nexports.geoConicConformal = conicConformal;\nexports.geoConicConformalRaw = conicConformalRaw;\nexports.geoConicEqualArea = conicEqualArea;\nexports.geoConicEqualAreaRaw = conicEqualAreaRaw;\nexports.geoConicEquidistant = conicEquidistant;\nexports.geoConicEquidistantRaw = conicEquidistantRaw;\nexports.geoEquirectangular = equirectangular;\nexports.geoEquirectangularRaw = equirectangularRaw;\nexports.geoGnomonic = gnomonic;\nexports.geoGnomonicRaw = gnomonicRaw;\nexports.geoIdentity = identity$5;\nexports.geoProjection = projection;\nexports.geoProjectionMutator = projectionMutator;\nexports.geoMercator = mercator;\nexports.geoMercatorRaw = mercatorRaw;\nexports.geoOrthographic = orthographic;\nexports.geoOrthographicRaw = orthographicRaw;\nexports.geoStereographic = stereographic;\nexports.geoStereographicRaw = stereographicRaw;\nexports.geoTransverseMercator = transverseMercator;\nexports.geoTransverseMercatorRaw = transverseMercatorRaw;\nexports.geoRotation = rotation;\nexports.geoStream = geoStream;\nexports.geoTransform = transform;\nexports.cluster = cluster;\nexports.hierarchy = hierarchy;\nexports.pack = index$2;\nexports.packSiblings = siblings;\nexports.packEnclose = enclose;\nexports.partition = partition;\nexports.stratify = stratify;\nexports.tree = tree;\nexports.treemap = index$3;\nexports.treemapBinary = binary;\nexports.treemapDice = treemapDice;\nexports.treemapSlice = treemapSlice;\nexports.treemapSliceDice = sliceDice;\nexports.treemapSquarify = squarify;\nexports.treemapResquarify = resquarify;\nexports.interpolate = interpolateValue;\nexports.interpolateArray = array$1;\nexports.interpolateBasis = basis$1;\nexports.interpolateBasisClosed = basisClosed;\nexports.interpolateDate = date;\nexports.interpolateNumber = reinterpolate;\nexports.interpolateObject = object;\nexports.interpolateRound = interpolateRound;\nexports.interpolateString = interpolateString;\nexports.interpolateTransformCss = interpolateTransformCss;\nexports.interpolateTransformSvg = interpolateTransformSvg;\nexports.interpolateZoom = interpolateZoom;\nexports.interpolateRgb = interpolateRgb;\nexports.interpolateRgbBasis = rgbBasis;\nexports.interpolateRgbBasisClosed = rgbBasisClosed;\nexports.interpolateHsl = hsl$2;\nexports.interpolateHslLong = hslLong;\nexports.interpolateLab = lab$1;\nexports.interpolateHcl = hcl$2;\nexports.interpolateHclLong = hclLong;\nexports.interpolateCubehelix = cubehelix$2;\nexports.interpolateCubehelixLong = cubehelixLong;\nexports.quantize = quantize;\nexports.path = path;\nexports.polygonArea = area$1;\nexports.polygonCentroid = centroid$1;\nexports.polygonHull = hull;\nexports.polygonContains = contains$1;\nexports.polygonLength = length$2;\nexports.quadtree = quadtree;\nexports.queue = queue;\nexports.randomUniform = uniform;\nexports.randomNormal = normal;\nexports.randomLogNormal = logNormal;\nexports.randomBates = bates;\nexports.randomIrwinHall = irwinHall;\nexports.randomExponential = exponential$1;\nexports.request = request;\nexports.html = html;\nexports.json = json;\nexports.text = text;\nexports.xml = xml;\nexports.csv = csv$1;\nexports.tsv = tsv$1;\nexports.scaleBand = band;\nexports.scalePoint = point$1;\nexports.scaleIdentity = identity$6;\nexports.scaleLinear = linear$2;\nexports.scaleLog = log$1;\nexports.scaleOrdinal = ordinal;\nexports.scaleImplicit = implicit;\nexports.scalePow = pow$1;\nexports.scaleSqrt = sqrt$1;\nexports.scaleQuantile = quantile$$1;\nexports.scaleQuantize = quantize$1;\nexports.scaleThreshold = threshold$1;\nexports.scaleTime = time;\nexports.scaleUtc = utcTime;\nexports.schemeCategory10 = category10;\nexports.schemeCategory20b = category20b;\nexports.schemeCategory20c = category20c;\nexports.schemeCategory20 = category20;\nexports.interpolateCubehelixDefault = cubehelix$3;\nexports.interpolateRainbow = rainbow$1;\nexports.interpolateWarm = warm;\nexports.interpolateCool = cool;\nexports.interpolateViridis = viridis;\nexports.interpolateMagma = magma;\nexports.interpolateInferno = inferno;\nexports.interpolatePlasma = plasma;\nexports.scaleSequential = sequential;\nexports.creator = creator;\nexports.local = local$1;\nexports.matcher = matcher$1;\nexports.mouse = mouse;\nexports.namespace = namespace;\nexports.namespaces = namespaces;\nexports.select = select;\nexports.selectAll = selectAll;\nexports.selection = selection;\nexports.selector = selector;\nexports.selectorAll = selectorAll;\nexports.touch = touch;\nexports.touches = touches;\nexports.window = window;\nexports.customEvent = customEvent;\nexports.arc = arc;\nexports.area = area$2;\nexports.line = line;\nexports.pie = pie;\nexports.radialArea = radialArea;\nexports.radialLine = radialLine$1;\nexports.symbol = symbol;\nexports.symbols = symbols;\nexports.symbolCircle = circle$2;\nexports.symbolCross = cross$2;\nexports.symbolDiamond = diamond;\nexports.symbolSquare = square;\nexports.symbolStar = star;\nexports.symbolTriangle = triangle;\nexports.symbolWye = wye;\nexports.curveBasisClosed = basisClosed$1;\nexports.curveBasisOpen = basisOpen;\nexports.curveBasis = basis$2;\nexports.curveBundle = bundle;\nexports.curveCardinalClosed = cardinalClosed;\nexports.curveCardinalOpen = cardinalOpen;\nexports.curveCardinal = cardinal;\nexports.curveCatmullRomClosed = catmullRomClosed;\nexports.curveCatmullRomOpen = catmullRomOpen;\nexports.curveCatmullRom = catmullRom;\nexports.curveLinearClosed = linearClosed;\nexports.curveLinear = curveLinear;\nexports.curveMonotoneX = monotoneX;\nexports.curveMonotoneY = monotoneY;\nexports.curveNatural = natural;\nexports.curveStep = step;\nexports.curveStepAfter = stepAfter;\nexports.curveStepBefore = stepBefore;\nexports.stack = stack;\nexports.stackOffsetExpand = expand;\nexports.stackOffsetNone = none$1;\nexports.stackOffsetSilhouette = silhouette;\nexports.stackOffsetWiggle = wiggle;\nexports.stackOrderAscending = ascending$2;\nexports.stackOrderDescending = descending$2;\nexports.stackOrderInsideOut = insideOut;\nexports.stackOrderNone = none$2;\nexports.stackOrderReverse = reverse;\nexports.timeInterval = newInterval;\nexports.timeMillisecond = millisecond;\nexports.timeMilliseconds = milliseconds;\nexports.utcMillisecond = millisecond;\nexports.utcMilliseconds = milliseconds;\nexports.timeSecond = second;\nexports.timeSeconds = seconds;\nexports.utcSecond = second;\nexports.utcSeconds = seconds;\nexports.timeMinute = minute;\nexports.timeMinutes = minutes;\nexports.timeHour = hour;\nexports.timeHours = hours;\nexports.timeDay = day;\nexports.timeDays = days;\nexports.timeWeek = sunday;\nexports.timeWeeks = sundays;\nexports.timeSunday = sunday;\nexports.timeSundays = sundays;\nexports.timeMonday = monday;\nexports.timeMondays = mondays;\nexports.timeTuesday = tuesday;\nexports.timeTuesdays = tuesdays;\nexports.timeWednesday = wednesday;\nexports.timeWednesdays = wednesdays;\nexports.timeThursday = thursday;\nexports.timeThursdays = thursdays;\nexports.timeFriday = friday;\nexports.timeFridays = fridays;\nexports.timeSaturday = saturday;\nexports.timeSaturdays = saturdays;\nexports.timeMonth = month;\nexports.timeMonths = months;\nexports.timeYear = year;\nexports.timeYears = years;\nexports.utcMinute = utcMinute;\nexports.utcMinutes = utcMinutes;\nexports.utcHour = utcHour;\nexports.utcHours = utcHours;\nexports.utcDay = utcDay;\nexports.utcDays = utcDays;\nexports.utcWeek = utcSunday;\nexports.utcWeeks = utcSundays;\nexports.utcSunday = utcSunday;\nexports.utcSundays = utcSundays;\nexports.utcMonday = utcMonday;\nexports.utcMondays = utcMondays;\nexports.utcTuesday = utcTuesday;\nexports.utcTuesdays = utcTuesdays;\nexports.utcWednesday = utcWednesday;\nexports.utcWednesdays = utcWednesdays;\nexports.utcThursday = utcThursday;\nexports.utcThursdays = utcThursdays;\nexports.utcFriday = utcFriday;\nexports.utcFridays = utcFridays;\nexports.utcSaturday = utcSaturday;\nexports.utcSaturdays = utcSaturdays;\nexports.utcMonth = utcMonth;\nexports.utcMonths = utcMonths;\nexports.utcYear = utcYear;\nexports.utcYears = utcYears;\nexports.timeFormatDefaultLocale = defaultLocale$1;\nexports.timeFormatLocale = formatLocale$1;\nexports.isoFormat = formatIso;\nexports.isoParse = parseIso;\nexports.now = now;\nexports.timer = timer;\nexports.timerFlush = timerFlush;\nexports.timeout = timeout$1;\nexports.interval = interval$1;\nexports.transition = transition;\nexports.active = active;\nexports.interrupt = interrupt;\nexports.voronoi = voronoi;\nexports.zoom = zoom;\nexports.zoomTransform = transform$1;\nexports.zoomIdentity = identity$8;\n\nObject.defineProperty(exports, '__esModule', { value: true });\n\n})));\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  var d3 = require(\"d3\");\r\n  var Chart = require(\"./chart.js\");\r\n\r\n  module.exports = Barchart;\r\n\r\n  // Barchart inherits from Chart\r\n  Barchart.prototype = Object.create(Chart.prototype);\r\n  Barchart.prototype.constructor = Barchart;\r\n\r\n  /**\r\n    * @class Barchart\r\n    * @summary Represent data with a barchart\r\n    * @desc Barcharts are polyvalent charts that should be used most of the time.\r\n    * In a barchart individual value are visually easy to compare because the\r\n    * human eye is good at comparing lengths. Moreover barcharts can represent\r\n    * negative values while polar charts can only represent positive values; \r\n    * @param {string} el CSS selector representing the element that will hold the chart.\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {BarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @typedef {object} BarchartOptions\r\n    * @memberOf Barchart\r\n    * @prop {number|\"auto\"} [minValue=\"auto\"] Minimum value data could take. It\r\n    * is important to set this option explicitely if one wants to compare\r\n    * charts and use the same scale on each one. By default `minValue` equals to 0\r\n    * if all data values are positive or the minimum value if some values are\r\n    * negative.\r\n    * @prop {number|\"auto\"} [maxValue=\"auto\"] Maximum value data could take.It\r\n    * is important to set this option explicitely if one wants to compare\r\n    * charts and use the same scale on each one. By default it equals to 0 if all\r\n    * values are negative or to maximmum value if some value is positive.\r\n    * @prop {number} [width=60] Width of the chart.\r\n    * @prop {number} [height=60] Height of the chart.\r\n    * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds.\r\n    * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of\r\n    * colors or a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value.If it is an array with length less than the length\r\n    * of data, then the colors are recycled.\r\n    * @prop {string[]|\"none\"|\"auto\"|function}[labels=\"none\"] Labels to display in bars.\r\n    * It can be an array with same length as the data. It can also be a function\r\n    * `(d, i) -> labelText` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"none\" to hide labels\r\n    * or \"auto\" to display in a compact way values.\r\n    * @prop {string|string[]|\"auto\"|function}[labelColors=\"auto\"] Color of the labels.\r\n    * It can be a single value or an array with same length as the data. It can\r\n    * also be a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"auto\". In this case,\r\n    * the most readable color is choosen depding on the color of the bar.\r\n    * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is\r\n    * not enough space for a given label, then it is hidden.\r\n    * @prop {number}[labelMaxSize=24] Label maximum size in pixels.\r\n    * @prop {number}[labelPadding=2] Padding to apply to apply to labels.\r\n    * @prop {string}[labelClass=\"\"] Labels CSS class.\r\n    * @prop {string}[shapeClass=\"\"] bars CSS class.\r\n    * @prop {string}[zeroLineStyle=\"stroke:#333;stroke-width:1;\"] CSS style of the\r\n    * line representing the zero value.\r\n    */\r\n\r\n  /** @method setData\r\n    * @desc Update the data represented by the chart\r\n    * @instance\r\n    * @memberOf Barchart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    */\r\n\r\n  /** @method setOptions\r\n    * @desc Update the graphical options of a chart\r\n    * @instance\r\n    * @memberOf Barchart\r\n    * @param {BarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @method update\r\n    * @desc Update simulatenously data and options of a barchart.\r\n    * @instance\r\n    * @memberOf Barchart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {BarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n  function Barchart(el, data, options) {\r\n    // Default options\r\n    var defaults = {\r\n      minValue: \"auto\",\r\n      maxValue: \"auto\",\r\n      zeroLineStyle: \"stroke:#333;stroke-width:1;\"\r\n    };\r\n\r\n    // Call super constructor\r\n    Chart.call(this, el, data, options, defaults);\r\n\r\n    // Initialize the zero line\r\n    var scaleFun = d3.scaleLinear()\r\n      .domain([this._options.minValue, this._options.maxValue])\r\n      .range([this._options.height, 0]);\r\n\r\n    this._zeroLine = this._container.append(\"line\")\r\n      .attr(\"x1\", 0)\r\n      .attr(\"y1\", scaleFun(0))\r\n      .attr(\"x2\", this._options.width)\r\n      .attr(\"y2\", scaleFun(0))\r\n      .attr(\"style\", this._options.zeroLineStyle);\r\n\r\n    this._draw();\r\n  }\r\n\r\n  // See comments in chart.js\r\n  Barchart.prototype._processOptions = function(options) {\r\n    options = Chart.prototype._processOptions.call(this, options, this._options);\r\n\r\n    // Set min value and max value if necessary.\r\n    if (options.minValue === \"auto\") {\r\n      var min = d3.min(this._data);\r\n      var max = options.maxValue === \"auto\"? d3.max(this._data): options.maxValue;\r\n\r\n      if (max > 0 && min > 0) options.minValue = 0;\r\n      else options.minValue = min;\r\n    }\r\n\r\n    if (options.maxValue === \"auto\") {\r\n      var max = options.minValue === \"auto\"? d3.min(this._data): options.minValue;\r\n      var max = d3.max(this._data);\r\n\r\n      if (max < 0 && min < 0) options.maxValue = 0;\r\n      else options.maxValue = max;\r\n    }\r\n\r\n    return options;\r\n  };\r\n\r\n  // See comments in chart.js\r\n  Barchart.prototype._draw = function() {\r\n    var self = this;\r\n    Chart.prototype._draw.call(this);\r\n\r\n    var barWidth = (self._options.width - 6) / self._data.length;\r\n    var scaleFun = d3.scaleLinear()\r\n      .domain([self._options.minValue, self._options.maxValue])\r\n      .range([self._options.height, 0]);\r\n\r\n    // Update the zero line\r\n    self._zeroLine\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attr(\"x1\", 0)\r\n      .attr(\"y1\", scaleFun(0))\r\n      .attr(\"x2\", self._options.width)\r\n      .attr(\"y2\", scaleFun(0))\r\n      .attr(\"style\", self._options.zeroLineStyle);\r\n\r\n    // Update bars\r\n    var bar = self._chart.selectAll(\"path\").data(self._data);\r\n    // Add new bars\r\n    function rectPath(x, y, w, h) {\r\n      return (\"M\" + x + \" \" + y + \"l\" + w + \" 0l0 \" + h + \"l\" + (-w) + \" 0Z\")\r\n    }\r\n\r\n    bar.enter()\r\n      .append(\"path\")\r\n      .attr(\"d\", function(d, i) {return rectPath((i + 1) * barWidth + 3, scaleFun(0), 0, 0)})\r\n    // Update bars\r\n      .merge(bar)\r\n      .attr(\"class\", self._options.shapeClass)\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attr(\"d\", function(d, i) {return rectPath(i * barWidth + 3, scaleFun(0), barWidth, scaleFun(d) - scaleFun(0))})\r\n      .attr(\"fill\", self._options.colorFun);\r\n    // Remove bars\r\n    bar.exit()\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attr(\"x\", function(d, i) {return i * barWidth + 3;})\r\n      .attr(\"y\", 0)\r\n      .attr(\"width\", 0)\r\n      .attr(\"height\", 0)\r\n      .remove();\r\n\r\n    // Add/ update labels\r\n    function initLabel(label, d, i) {\r\n      label.fillRect(\r\n        i * barWidth + 3, scaleFun(0),\r\n        barWidth, 0,\r\n        self._options.labelPadding,\r\n        \"center\", d >= 0? \"top\": \"bottom\",\r\n        0\r\n      );\r\n    }\r\n\r\n    function updateLabel(label, d, i) {\r\n      label.fillRect(\r\n        i * barWidth + 3, d >= 0? scaleFun(d) : scaleFun(0),\r\n        barWidth, Math.abs(scaleFun(d) - scaleFun(0)),\r\n        self._options.labelPadding,\r\n        \"center\", d >= 0? \"top\": \"bottom\",\r\n        self._options.transitionTime);\r\n    }\r\n\r\n    this._drawLabels(initLabel, updateLabel);\r\n  }\r\n\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  var d3 = require(\"d3\");\r\n  var tinycolor = require(\"tinycolor2\");\r\n  var utils = require(\"./utils.js\");\r\n  var Label = require(\"./label.js\")\r\n\r\n  module.exports = Chart;\r\n\r\n  /*  @class Chart\r\n    * Abstract class inherited by other classes\r\n    * @param{string} el\r\n    * @param{number[]} data\r\n    * @param {object} options\r\n    * @param {object} defaults\r\n    *\r\n    */\r\n  function Chart(el, data, options, defaults) {\r\n    this._data = data;\r\n\r\n    // Merge options with default options of this class and of the child class\r\n    /**\r\n    * @prop {number} [height=60] width\r\n    * @prop {number} [width=60] height\r\n    * @prop {number} [transitionTime=750] transitionTime\r\n    * @prop {string[]|function} [colors=d3.schemeCategory10] colors\r\n    * @prop {string[]|\"none\"|\"auto\"|function} [labels=\"none\"] labels\r\n    * @prop {string[]|\"auto\"|function} [labelColors=\"auto\"] labelColors\r\n    * @prop {number} [labelMinSize=8] labelMinSize\r\n    * @prop {number} [labelMaxSize=24] labelMaxSize\r\n    * @prop {number} [labelPadding=2] labelPadding\r\n    * @prop {labelClass} [labelClass=\"\"]labelClass\r\n    * @prop {shapeClass} [shapeClass=\"\"] shapeClass\r\n    */\r\n    this._options = {\r\n      width:60,\r\n      height: 60,\r\n      transitionTime: 750,\r\n      colors: d3.schemeCategory10,\r\n      labels: \"none\",\r\n      labelColors: \"auto\",\r\n      labelMinSize: 8,\r\n      labelMaxSize: 24,\r\n      labelPadding: 2,\r\n      labelClass: \"\",\r\n      shapeClass: \"\"\r\n    };\r\n    this._options = utils.mergeOptions(this._options, defaults || {});\r\n    this._options = this._processOptions(options);\r\n\r\n    // Remove everything in the container and create required elements\r\n    d3.select(el).select(\"*\").remove();\r\n    this._container = d3.select(el).append(\"svg\")\r\n      .attr(\"width\", this._options.width)\r\n      .attr(\"height\", this._options.height);\r\n    this._chart = this._container.append(\"g\");\r\n  }\r\n\r\n  /*  Update data and options of a chart\r\n    *\r\n    */\r\n  Chart.prototype.update = function(data, options) {\r\n    this._data = data;\r\n    this._options = this._processOptions(options);\r\n    this._draw();\r\n  };\r\n\r\n  Chart.prototype.setOptions = function(options) {\r\n    this._options = this._processOptions(options);\r\n    this._draw();\r\n  };\r\n\r\n  Chart.prototype.setData = function(data) {\r\n    this._data = data;\r\n    this._draw();\r\n  };\r\n\r\n  Chart.prototype._draw = function() {\r\n    var self = this;\r\n    // Update container size\r\n    self._container\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attr(\"width\", self._options.width)\r\n      .attr(\"height\", self._options.height);\r\n  };\r\n\r\n  Chart.prototype._processOptions = function(options) {\r\n    options = utils.mergeOptions(options, this._options);\r\n\r\n    // Convert parameters colors, labels and labelColors to functions\r\n    options.colorFun = utils.toFunction(options.colors);\r\n    options.labelClass = utils.toFunction(options.labelClass);\r\n    options.shapeClass = utils.toFunction(options.shapeClass);\r\n\r\n    if (options.labels === \"none\") {\r\n      options.labelText = null;\r\n    } else if (options.labels === \"auto\") {\r\n      options.labelText = utils.prettyNumber;\r\n    }  else {\r\n      options.labelText = utils.toFunction(options.labels);\r\n    }\r\n\r\n    if (options.labelColors === \"auto\") {\r\n      options.labelColorFun = function(d, i) {\r\n        return tinycolor.mostReadable(options.colorFun(d, i), [\"white\", \"black\"])._originalInput\r\n      };\r\n    } else {\r\n      options.labelColorFun = utils.toFunction(options.labelColorFun);\r\n    }\r\n\r\n    return options;\r\n  }\r\n\r\n  Chart.prototype._drawLabels = function(initFun, updateFun) {\r\n    var self = this;\r\n\r\n    if (self._options.labels === \"none\") {\r\n      self._chart.selectAll(\".labels-container\").remove();\r\n      return;\r\n    }\r\n\r\n\r\n    self._labels = self._chart.selectAll(\".labels-container\").data(self._data);\r\n    self._labels.enter()\r\n      .append(\"g\")\r\n      .attr(\"class\", \"labels-container\")\r\n      .each(function(d, i) {\r\n        this._label = new Label(this, self._options.labelStyle, self._options.labelColorFun(d, i),\r\n                                self._options.labelMinSize, self._options.labelMaxSize);\r\n        this._label.updateText(self._options.labelText(d, i))\r\n        initFun(this._label, d, i);\r\n      })\r\n\r\n      .merge(self._labels)\r\n      .each(function(d, i) {\r\n        this._label.updateText(self._options.labelText(d, i));\r\n        this._label._text\r\n          .attr(\"fill\", self._options.labelColorFun(d, i))\r\n          .attr(\"class\", self._options.labelClass(d, i));\r\n        updateFun(this._label, d, i);\r\n      });\r\n\r\n    self._labels.exit().remove();\r\n  }\r\n\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  module.exports.Point = Point;\r\n  module.exports.Line = Line;\r\n  module.exports.intersectionOfTwoLines = intersectionOfTwoLines;\r\n  module.exports.intersectionLineAndCircle = intersectionLineAndCircle;\r\n  module.exports.pointInSegment = pointInSegment;\r\n  module.exports.intersectionLineRadius  = intersectionLineRadius ;\r\n  module.exports.distance = distance;\r\n\r\n  function Point(x, y) {\r\n    this.x = x;\r\n    this.y = y;\r\n  }\r\n\r\n  function Line(a, b) {\r\n    this.a = a;\r\n    this.b = b\r\n  }\r\n  Line.prototype.getY = function(x) {\r\n    return this.a + this.b * x;\r\n  }\r\n\r\n  function intersectionOfTwoLines(l1, l2) {\r\n    if (l1.b == l2.b) return []\r\n    return [new Point(\r\n      (l2.a - l1.a) / (l1.b - l2.b),\r\n      (l1.b * l2.a - l1.a * l2.b) / (l1.b - l2.b)\r\n    )]\r\n  }\r\n\r\n  function intersectionLineRadius(l, angle, radius) {\r\n    var l2 = new Line(0, Math.tan(angle));\r\n    var intersect = intersectionOfTwoLines(l, l2);\r\n    var s1 = new Point(0, 0);\r\n    var s2 = new Point(radius * Math.cos(angle), radius * Math.sin(angle));\r\n\r\n    if (intersect.length == 0 || !pointInSegment(intersect[0], s1, s2)) {\r\n      return [];\r\n    } else {\r\n      return intersect;\r\n    }\r\n  }\r\n\r\n  function intersectionLineAndCircle(l, r) {\r\n    var x = solveEqSecondDegree(l.b * l.b + 1, 2 * l.a * l.b, l.a * l.a - r * r);\r\n    return x.map(function(x) {return new Point(x, l.getY(x))});\r\n  }\r\n\r\n  // Is point p inside the segment defined by s1 and s2. It is assumed that the\r\n  // three points are aligned.\r\n  function pointInSegment(p, s1, s2) {\r\n    var kp = dotProd(pointDiff(s2, s1), pointDiff(p, s1));\r\n    var ks = dotProd(pointDiff(s2, s1), pointDiff(s2, s1));\r\n    return kp >= 0 && kp <= ks;\r\n  }\r\n\r\n  function pointDiff(p1, p2) {\r\n    return new Point(p1.x - p2.x, p1.y - p2.y);\r\n  }\r\n\r\n  function dotProd(p1, p2) {\r\n    return p1.x * p2.x + p1.y * p2.y;\r\n  }\r\n\r\n  function solveEqSecondDegree(a, b, c) {\r\n    var det = b * b - 4 * a * c\r\n    if (det < 0) return [];\r\n    if (det == 0) return [(- b) / (2 * a)];\r\n    else return [\r\n      (-b - Math.sqrt(det)) / (2 * a),\r\n      (-b + Math.sqrt(det)) / (2 * a)\r\n    ]\r\n  }\r\n\r\n  function distance(p1, p2) {\r\n    return Math.sqrt( Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2))\r\n  }\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  var d3 = require(\"d3\");\r\n  var g = require(\"./geometry.js\")\r\n\r\n  module.exports = Label;\r\n\r\n  function Label(el, style, color, minSize, maxSize) {\r\n    this._el = el;\r\n    this._minSize = minSize;\r\n    this._maxSize = maxSize;\r\n    this._container = d3.select(el);\r\n    this._label = this._container.append(\"g\")\r\n      .attr(\"class\", \"label\");\r\n\r\n    this._text = this._label.append(\"text\")\r\n      .attr(\"dy\", \"0.35em\")\r\n      .attr(\"text-anchor\", \"middle\")\r\n      .attr(\"style\", style || \"\")\r\n      .attr(\"fill\", color || \"black\");\r\n  }\r\n\r\n  // Size of the label before scaling\r\n  Label.prototype.innerSize = function() {\r\n    return this._text.node().getBBox();\r\n  }\r\n\r\n  Label.prototype.size = function() {\r\n    var bbox = this.innerSize();\r\n    return {\r\n      width: bbox.width * this._scale,\r\n      height: bbox.height * this._scale\r\n    }\r\n  }\r\n\r\n  Label.prototype.updateText = function(newText) {\r\n    // New label should fit in the old bounding bbox\r\n    var oldSize = this.size();\r\n    this._text.text(newText);\r\n    var newSize = this.size();\r\n\r\n    var scale = Math.min(\r\n      oldSize.width / newSize.width,\r\n      oldSize.height / newSize.height\r\n    );\r\n    this.updateScale(this._scale * scale, 0);\r\n    return this;\r\n  }\r\n\r\n  Label.prototype.updatePosition = function(x, y, transitionTime) {\r\n    this._container\r\n      .transition()\r\n      .duration(transitionTime || 0)\r\n      .attr(\"transform\", \"translate(\" + x + \",\" + y + \")\");\r\n      return this;\r\n  }\r\n\r\n  Label.prototype.updateScale = function(newScale, transitionTime) {\r\n    if (!newScale || isNaN(newScale) || !isFinite(newScale)) {\r\n      newScale = 0;\r\n    }\r\n    var newHeight = this.innerSize().height * newScale;\r\n    if (this._minSize && newHeight < this._minSize) {\r\n      newScale = 0;\r\n    }\r\n    if (this._maxSize && newHeight > this._maxSize) {\r\n      newScale = this._maxSize / this.innerSize().height;\r\n    }\r\n    this._label\r\n      .transition()\r\n      .duration(transitionTime || 0)\r\n      .attr(\"transform\", \"scale(\" + newScale + \")\");\r\n    this._scale = newScale;\r\n\r\n    return this;\r\n  }\r\n\r\n  Label.prototype.fillRect = function(x, y, width, height, padding,\r\n                                      hAlign, vAlign,\r\n                                      transitionTime) {\r\n      var bbox = this.innerSize();\r\n      this.updateScale(Math.min(\r\n        (width - 2 * padding) / bbox.width,\r\n        (Math.abs(height)) / bbox.height\r\n      ), transitionTime);\r\n\r\n      var lsize = this.size();\r\n      var lx, ly;\r\n      switch(vAlign) {\r\n        case \"top\":\r\n          ly = y + lsize.height / 2;\r\n          break;\r\n        case \"center\":\r\n          ly = y + (height) / 2;\r\n          break;\r\n        case \"bottom\":\r\n          ly = y + height - lsize.height / 2;\r\n      }\r\n\r\n      switch(hAlign) {\r\n        case \"left\":\r\n          lx = x + padding + lsize.width / 2;\r\n          break;\r\n        case \"center\":\r\n          lx = x + width / 2;\r\n          break;\r\n        case \"right\":\r\n          lx = x + width - padding - lsize.width / 2;\r\n      }\r\n\r\n      this.updatePosition(lx, ly, transitionTime);\r\n\r\n    return this;\r\n  }\r\n\r\n  Label.prototype.fillCircle = function(radius, transitionTime) {\r\n    this.updatePosition(0, 0, transitionTime);\r\n\r\n    var bbox = this.innerSize();\r\n    var ratio = bbox.height / bbox.width;\r\n\r\n    var maxHeight = radius * 2 * Math.cos(Math.PI/2 - Math.atan(ratio))\r\n    this.updateScale(maxHeight / bbox.height, transitionTime);\r\n  }\r\n\r\n  Label.prototype.fillSlice = function(arc, radius, d, transitionTime) {\r\n    var c = arc.centroid(d);\r\n    this.updatePosition(c[0], c[1], transitionTime);\r\n\r\n    var bbox = this.innerSize();\r\n    var ratio = bbox.height / bbox.width;\r\n\r\n    // Get maximal scale so that label fits in the slice.\r\n    var diag1 = new g.Line(c[1] - ratio * c[0], ratio);\r\n    var diag2 = new g.Line(c[1] + ratio * c[0], -ratio);\r\n    var limit1 = new g.Line(0, Math.tan(d.startAngle + Math.PI/2));\r\n    var limit2 = new g.Line(0, Math.tan(d.endAngle + Math.PI/2));\r\n\r\n    // Get all intersection points\r\n    var intersects = [];\r\n    intersects = intersects.concat(g.intersectionLineRadius(diag1, d.startAngle - Math.PI/2, radius));\r\n    intersects = intersects.concat(g.intersectionLineRadius(diag1, d.endAngle - Math.PI/2, radius));\r\n    intersects = intersects.concat(g.intersectionLineAndCircle(diag1, radius));\r\n    intersects = intersects.concat(g.intersectionLineRadius(diag2, d.startAngle - Math.PI/2, radius));\r\n    intersects = intersects.concat(g.intersectionLineRadius(diag2, d.endAngle - Math.PI/2, radius));\r\n    intersects = intersects.concat(g.intersectionLineAndCircle(diag2, radius));\r\n\r\n    // Compute distance between all these points and take the minimum\r\n    var center = new g.Point(c[0], c[1]);\r\n    var distances = intersects.map(function(x) {return g.distance(center, x)});\r\n    var minDist = d3.min(distances);\r\n    var actualDist = Math.sqrt( Math.pow(bbox.height / 2, 2) + Math.pow(bbox.width / 2, 2));\r\n\r\n    this.updateScale(minDist / actualDist, transitionTime);\r\n  }\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  module.exports.Barchart = require(\"./barchart.js\");\r\n  module.exports.Polarchart = require(\"./polarchart.js\");\r\n  module.exports.Piechart = require(\"./piechart.js\");\r\n\r\n  if (window) window.minicharts = module.exports;\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n  var Polarchart = require(\"./polarchart.js\");\r\n  module.exports = Piechart;\r\n\r\n  Piechart.prototype = Object.create(Polarchart.prototype);\r\n  Piechart.prototype.constructor = Piechart;\r\n\r\n  /**\r\n    * @class Piechart\r\n    * @summary Represent data with a pie chart\r\n    * @desc A pie chart is a special case of polar chart where the data values\r\n    * are represented by the angle of the slices. They should only be used to\r\n    * compare qualitatively proportions and compositions. Indeed, human eye is\r\n    * not good at comparing angles so only large differences are visible.\r\n    * @param {string} el CSS selector representing the element that will hold the chart.\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {PiechartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @typedef {object} PiechartOptions\r\n    * @memberOf Piechart\r\n    * @prop {number} [width=60] Width of the chart.\r\n    * @prop {number} [height=60] Height of the chart.\r\n    * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds.\r\n    * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of\r\n    * colors or a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value.If it is an array with length less than the length\r\n    * of data, then the colors are recycled.\r\n    * @prop {string[]|\"none\"|\"auto\"|function}[labels=\"none\"] Labels to display in slices.\r\n    * It can be an array with same length as the data. It can also be a function\r\n    * `(d, i) -> labelText` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"none\" to hide labels\r\n    * or \"auto\" to display in a compact way values.\r\n    * @prop {string|string[]|\"auto\"|function}[labelColors=\"auto\"] Color of the labels.\r\n    * It can be a single value or an array with same length as the data. It can\r\n    * also be a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"auto\". In this case,\r\n    * the most readable color is choosen depding on the color of the slice.\r\n    * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is\r\n    * not enough space for a given label, then it is hidden.\r\n    * @prop {number}[labelMaxSize=24] Label maximum size in pixels.\r\n    * @prop {string}[labelClass=\"\"] Labels CSS class.\r\n    * @prop {string}[shapeClass=\"\"] slices CSS class.\r\n    */\r\n\r\n  /** @method setData\r\n    * @desc Update the data represented by the chart\r\n    * @instance\r\n    * @memberOf Piechart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    */\r\n\r\n  /** @method setOptions\r\n    * @desc Update the graphical options of a chart\r\n    * @instance\r\n    * @memberOf Piechart\r\n    * @param {PiechartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @method update\r\n    * @desc Update simulatenously data and options of a pie chart.\r\n    * @instance\r\n    * @memberOf Piechart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {PiechartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n  function Piechart(el, data, options) {\r\n    Polarchart.call(this, el, data, options);\r\n  }\r\n\r\n  Piechart.prototype._processOptions = function(options) {\r\n    options = options || {};\r\n    options.type = \"angle\";\r\n    return Polarchart.prototype._processOptions.call(this, options);\r\n  }\r\n\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  var d3 = require(\"d3\");\r\n  var Chart = require(\"./chart.js\");\r\n\r\n  module.exports = Polarchart;\r\n\r\n  Polarchart.prototype = Object.create(Chart.prototype);\r\n  Polarchart.prototype.constructor = Polarchart;\r\n\r\n  /**\r\n    * @class Polarchart\r\n    * @summary Represent data with a polar chart\r\n    * @desc Polar charts are nice looking charts especially on a map,\r\n    * but individual values are hard to compare\r\n    * on these charts: the human eye is good to compare lengths, but not\r\n    * to compare agnles, radius or areas. Polar charts should only be used when\r\n    * one wants to point out qualitative results and does not need a precise\r\n    * representation of data. Another limitation compared to barcharts is that\r\n    * polar charts cannot represent negative values.\r\n    * @param {string} el CSS selector representing the element that will hold the chart.\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {PolarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @typedef {object} PolarchartOptions\r\n    * @memberOf Polarchart\r\n    * @prop {number|\"auto\"} [maxValue=\"auto\"] Maximum value data could take.It\r\n    * is important to set this option explicitely if one wants to compare\r\n    * charts and use the same scale on each one. By default it equals to the\r\n    * maximum value of the data.\r\n    * @prop {\"area\"|\"radius\"|\"angle\"} [type=\"area\"] What kind of scale to use to\r\n    * represent the data? `angle` produces a pie chart and should be used only to visualize\r\n    * proportions. In other cases, `area` (the default) should generally be\r\n    * prefered. `radius` should only be used when one wants to magnify differences.\r\n    * @prop {number} [width=60] Width of the chart.\r\n    * @prop {number} [height=60] Height of the chart.\r\n    * @prop {number} [transitionTime=750] Duration of the transitions, in milliseconds.\r\n    * @prop {string[]|function}[colors=d3.schemeCategory10] Either an array of\r\n    * colors or a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value.If it is an array with length less than the length\r\n    * of data, then the colors are recycled.\r\n    * @prop {string[]|\"none\"|\"auto\"|function}[labels=\"none\"] Labels to display in slices.\r\n    * It can be an array with same length as the data. It can also be a function\r\n    * `(d, i) -> labelText` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"none\" to hide labels\r\n    * or \"auto\" to display in a compact way values.\r\n    * @prop {string|string[]|\"auto\"|function}[labelColors=\"auto\"] Color of the labels.\r\n    * It can be a single value or an array with same length as the data. It can\r\n    * also be a function `(d, i) -> color` where `d` is a data value and `i`\r\n    * is the index of the value. Finally it can be equal to \"auto\". In this case,\r\n    * the most readable color is choosen depding on the color of the slice.\r\n    * @prop {number}[labelMinSize=8] Label minimum size in pixels. If there is\r\n    * not enough space for a given label, then it is hidden.\r\n    * @prop {number}[labelMaxSize=24] Label maximum size in pixels.\r\n    * @prop {string}[labelClass=\"\"] Labels CSS class.\r\n    * @prop {string}[shapeClass=\"\"] slices CSS class.\r\n    */\r\n\r\n  /** @method setData\r\n    * @desc Update the data represented by the chart\r\n    * @instance\r\n    * @memberOf Polarchart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    */\r\n\r\n  /** @method setOptions\r\n    * @desc Update the graphical options of a chart\r\n    * @instance\r\n    * @memberOf Polarchart\r\n    * @param {PolarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  /** @method update\r\n    * @desc Update simulatenously data and options of a polar chart.\r\n    * @instance\r\n    * @memberOf Polarchart\r\n    * @param {number[]} data Data the chart has to represent.\r\n    * @param {PolarchartOptions} options Options controling graphical aspects of the chart.\r\n    */\r\n\r\n  function Polarchart(el, data, options) {\r\n    var defaults = {\r\n      type: \"area\",\r\n      maxValue: \"auto\",\r\n    }\r\n\r\n    Chart.call(this, el, data, options, defaults);\r\n\r\n    // Center the chart group inside the container\r\n    this._chart\r\n      .attr(\"transform\", \"translate(\" + this._options.width/2 + \",\" + this._options.width/2 + \")\");\r\n\r\n    this._draw();\r\n  }\r\n\r\n  Polarchart.prototype._processOptions = function(options) {\r\n    options = Chart.prototype._processOptions.call(this, options, this._options);\r\n\r\n    options.height = options.width;\r\n\r\n    if (options.maxValue === \"auto\") {\r\n      options.maxValue = d3.max(this._data);\r\n    }\r\n    //debugger;\r\n    var radius = options.width / 2;\r\n    var pie = d3.pie().sort(null);\r\n    var arc = d3.arc().innerRadius(0);\r\n    var radiusFun;\r\n\r\n    if (options.type === \"angle\") {\r\n      radiusFun = function(d) {return radius}\r\n      pie.value(function(d) {return d});\r\n    } else {\r\n      radiusFun = options.type == \"radius\" ? d3.scaleLinear() : d3.scalePow().exponent(0.5);\r\n      radiusFun.range([0, radius])\r\n        .domain([0, options.maxValue]);\r\n      pie.value(function(d) {return 1});\r\n    }\r\n\r\n    arc.outerRadius(function(d, i) {return radiusFun(d.data)});\r\n\r\n    options.radius = radiusFun;\r\n    options.pie = pie;\r\n    options. arc = arc;\r\n    return options;\r\n  }\r\n\r\n  Polarchart.prototype._draw = function() {\r\n    var self = this;\r\n    Chart.prototype._draw.call(this);\r\n\r\n    // Move center of the chart\r\n    this._chart\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attr(\"transform\", \"translate(\" + self._options.width/2 + \",\" + self._options.width/2 + \")\");\r\n\r\n    var slices = this._chart.selectAll(\"path\").data(this._options.pie(this._data));\r\n\r\n    // Initialize new slices\r\n    slices.enter()\r\n      .append(\"path\")\r\n      .attr(\"class\", \"leaflet-clickable\")\r\n      .attr(\"d\", this._options.arc)\r\n      .attr(\"fill\", function(d, i) {return self._options.colorFun(d, i)})\r\n      .each(function(d, i) {\r\n        if (self._data.length == 1) this._current = {startAngle:d.startAngle, endAngle:d.endAngle, data:0}\r\n        else this._current = {startAngle:d.endAngle, endAngle:d.endAngle}\r\n      })\r\n    // Update slices\r\n      .merge(slices)\r\n      .attr(\"class\", function(d, i) {return self._options.shapeClass(d.data, i)})\r\n      .transition()\r\n      .duration(self._options.transitionTime)\r\n      .attrTween(\"d\", arcTween)\r\n      .attr(\"fill\", function(d, i) {return self._options.colorFun(d, i)});\r\n    // Remove slices\r\n    slices.exit().remove();\r\n\r\n    function arcTween(a) {\r\n      var i = d3.interpolate(this._current, a);\r\n      this._current = i(0);\r\n      return function(t) {\r\n        return self._options.arc(i(t));\r\n      };\r\n    }\r\n\r\n    // Add/update labels\r\n    // function(arc, radiusFun, d, transitionTime)\r\n    var initLabel, updateLabel;\r\n    if (this._data.length > 1) {\r\n      var data = this._options.pie(this._data);\r\n      initLabel = function(label, d, i) {\r\n        label.fillSlice(self._options.arc, self._options.radius(d), data[i], 0);\r\n      }\r\n\r\n      updateLabel = function(label, d, i) {\r\n        label.fillSlice(self._options.arc, self._options.radius(d), data[i],\r\n                        self._options.transitionTime);\r\n      }\r\n    } else {\r\n      initLabel = function(label, d, i) {\r\n        label.fillCircle(self._options.radius(d), 0);\r\n      }\r\n\r\n      updateLabel = function(label, d, i) {\r\n        label.fillCircle(self._options.radius(d), self._options.transitionTime);\r\n      }\r\n    }\r\n\r\n    this._drawLabels(initLabel, updateLabel);\r\n  }\r\n\r\n}());\r\n","// Copyright © 2016 RTE Réseau de transport d’électricité\r\n(function() {\r\n  'use strict';\r\n\r\n  module.exports.mergeOptions = mergeOptions;\r\n  module.exports.toArray = toArray;\r\n  module.exports.toFunction = toFunction;\r\n  module.exports.prettyNumber = prettyNumber;\r\n\r\n  /** Merge the properties of two objects. More precisely, if a property is\r\n    * present in \"defaults\" but not in \"options\" it is copied in options. this\r\n    * function is used to specified default options for a function.\r\n    *\r\n    * @param {object} options Option object\r\n    * @param {object} defaults Object containing default values of options\r\n    *\r\n    * @return {object} Merged object.\r\n    */\r\n  function mergeOptions(options, defaults) {\r\n    if (options) options = JSON.parse(JSON.stringify(options));\r\n    else options = {};\r\n    defaults = defaults || {};\r\n    for (var opt in defaults) {\r\n      if (defaults.hasOwnProperty(opt) && !options.hasOwnProperty(opt)) {\r\n        options[opt] = defaults[opt];\r\n      }\r\n    }\r\n    return options;\r\n  }\r\n\r\n  /** Converts parameter to Array. Used when user wants to pass a single value,\r\n    * but a function expects an array.\r\n    * @param {any} x An array or a scalar value\r\n    * @return {any[]}\r\n    * 'x' if it is an array, else an array with 'x' as its unique\r\n    * element.\r\n    */\r\n  function toArray(x) {\r\n    if (x.constructor !== Array) x = [x];\r\n    return x;\r\n  }\r\n\r\n  /** Converts its argument in a function.\r\n    * @param {any} x A function, an array, or a scalar.\r\n    * @return {function}\r\n    * - 'x' if it is a function.\r\n    * - If 'x' is a scalar, it returns a function that always returns 'x'\r\n    * - If 'x' is an array it returns the function (d, i) -> x[i]\r\n    */\r\n  function toFunction(x) {\r\n    if (typeof x === \"function\") return (x);\r\n    x = toArray(x);\r\n    return function(d, i) {return x[i % x.length]};\r\n  }\r\n\r\n  /** Transforms a number in a pretty and small string\r\n    * @param {number} number\r\n    * @return {string}\r\n    * A string representing the number. It only keeps at most 2 decimal\r\n    * digits and it adds suffixes \"K\", \"M\", \"B\", \"T\" for large values.\r\n    */\r\n  function prettyNumber(number) {\r\n    if (isNaN(number) || !isFinite(number)) return \"\";\r\n\r\n    var absVal = Math.abs(number);\r\n    var sign= number < 0? \"-\": \"\";\r\n    var scale;\r\n\r\n    if( absVal < 1000 ) {\r\n        scale = '';\r\n    } else if( absVal < 1000000 ) {\r\n        scale = 'K';\r\n        absVal = absVal/1000;\r\n\r\n    } else if( absVal < 1000000000 ) {\r\n        scale = 'M';\r\n        absVal = absVal/1000000;\r\n\r\n    } else if( absVal < 1000000000000 ) {\r\n        scale = 'B';\r\n        absVal = absVal/1000000000;\r\n\r\n    } else if( absVal < 1000000000000000 ) {\r\n        scale = 'T';\r\n        absVal = absVal/1000000000000;\r\n    }\r\n\r\n    if (absVal > 10) absVal = roundTo(absVal);\r\n    else if (absVal > 1) absVal = roundTo(absVal, 10, true);\r\n    else absVal = roundTo(absVal, 100, true);\r\n\r\n    return sign + absVal + scale;\r\n  }\r\n\r\n  /** Round a number\r\n    * @param {number} number\r\n    * @param {number} to: desired precision\r\n    * @param {boolean} inverse If true, number is rounded at the 1 / 'to'\r\n    */\r\n  function roundTo(number, to, inverse) {\r\n    to = to || 1;\r\n    if (inverse) return Math.round(number * to) / to;\r\n    else return Math.round(number / to) * to;\r\n  }\r\n}());\r\n","// TinyColor v1.4.1\n// https://github.com/bgrins/TinyColor\n// Brian Grinstead, MIT License\n\n(function(Math) {\n\nvar trimLeft = /^\\s+/,\n    trimRight = /\\s+$/,\n    tinyCounter = 0,\n    mathRound = Math.round,\n    mathMin = Math.min,\n    mathMax = Math.max,\n    mathRandom = Math.random;\n\nfunction tinycolor (color, opts) {\n\n    color = (color) ? color : '';\n    opts = opts || { };\n\n    // If input is already a tinycolor, return itself\n    if (color instanceof tinycolor) {\n       return color;\n    }\n    // If we are called as a function, call using new instead\n    if (!(this instanceof tinycolor)) {\n        return new tinycolor(color, opts);\n    }\n\n    var rgb = inputToRGB(color);\n    this._originalInput = color,\n    this._r = rgb.r,\n    this._g = rgb.g,\n    this._b = rgb.b,\n    this._a = rgb.a,\n    this._roundA = mathRound(100*this._a) / 100,\n    this._format = opts.format || rgb.format;\n    this._gradientType = opts.gradientType;\n\n    // Don't let the range of [0,255] come back in [0,1].\n    // Potentially lose a little bit of precision here, but will fix issues where\n    // .5 gets interpreted as half of the total, instead of half of 1\n    // If it was supposed to be 128, this was already taken care of by `inputToRgb`\n    if (this._r < 1) { this._r = mathRound(this._r); }\n    if (this._g < 1) { this._g = mathRound(this._g); }\n    if (this._b < 1) { this._b = mathRound(this._b); }\n\n    this._ok = rgb.ok;\n    this._tc_id = tinyCounter++;\n}\n\ntinycolor.prototype = {\n    isDark: function() {\n        return this.getBrightness() < 128;\n    },\n    isLight: function() {\n        return !this.isDark();\n    },\n    isValid: function() {\n        return this._ok;\n    },\n    getOriginalInput: function() {\n      return this._originalInput;\n    },\n    getFormat: function() {\n        return this._format;\n    },\n    getAlpha: function() {\n        return this._a;\n    },\n    getBrightness: function() {\n        //http://www.w3.org/TR/AERT#color-contrast\n        var rgb = this.toRgb();\n        return (rgb.r * 299 + rgb.g * 587 + rgb.b * 114) / 1000;\n    },\n    getLuminance: function() {\n        //http://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef\n        var rgb = this.toRgb();\n        var RsRGB, GsRGB, BsRGB, R, G, B;\n        RsRGB = rgb.r/255;\n        GsRGB = rgb.g/255;\n        BsRGB = rgb.b/255;\n\n        if (RsRGB <= 0.03928) {R = RsRGB / 12.92;} else {R = Math.pow(((RsRGB + 0.055) / 1.055), 2.4);}\n        if (GsRGB <= 0.03928) {G = GsRGB / 12.92;} else {G = Math.pow(((GsRGB + 0.055) / 1.055), 2.4);}\n        if (BsRGB <= 0.03928) {B = BsRGB / 12.92;} else {B = Math.pow(((BsRGB + 0.055) / 1.055), 2.4);}\n        return (0.2126 * R) + (0.7152 * G) + (0.0722 * B);\n    },\n    setAlpha: function(value) {\n        this._a = boundAlpha(value);\n        this._roundA = mathRound(100*this._a) / 100;\n        return this;\n    },\n    toHsv: function() {\n        var hsv = rgbToHsv(this._r, this._g, this._b);\n        return { h: hsv.h * 360, s: hsv.s, v: hsv.v, a: this._a };\n    },\n    toHsvString: function() {\n        var hsv = rgbToHsv(this._r, this._g, this._b);\n        var h = mathRound(hsv.h * 360), s = mathRound(hsv.s * 100), v = mathRound(hsv.v * 100);\n        return (this._a == 1) ?\n          \"hsv(\"  + h + \", \" + s + \"%, \" + v + \"%)\" :\n          \"hsva(\" + h + \", \" + s + \"%, \" + v + \"%, \"+ this._roundA + \")\";\n    },\n    toHsl: function() {\n        var hsl = rgbToHsl(this._r, this._g, this._b);\n        return { h: hsl.h * 360, s: hsl.s, l: hsl.l, a: this._a };\n    },\n    toHslString: function() {\n        var hsl = rgbToHsl(this._r, this._g, this._b);\n        var h = mathRound(hsl.h * 360), s = mathRound(hsl.s * 100), l = mathRound(hsl.l * 100);\n        return (this._a == 1) ?\n          \"hsl(\"  + h + \", \" + s + \"%, \" + l + \"%)\" :\n          \"hsla(\" + h + \", \" + s + \"%, \" + l + \"%, \"+ this._roundA + \")\";\n    },\n    toHex: function(allow3Char) {\n        return rgbToHex(this._r, this._g, this._b, allow3Char);\n    },\n    toHexString: function(allow3Char) {\n        return '#' + this.toHex(allow3Char);\n    },\n    toHex8: function(allow4Char) {\n        return rgbaToHex(this._r, this._g, this._b, this._a, allow4Char);\n    },\n    toHex8String: function(allow4Char) {\n        return '#' + this.toHex8(allow4Char);\n    },\n    toRgb: function() {\n        return { r: mathRound(this._r), g: mathRound(this._g), b: mathRound(this._b), a: this._a };\n    },\n    toRgbString: function() {\n        return (this._a == 1) ?\n          \"rgb(\"  + mathRound(this._r) + \", \" + mathRound(this._g) + \", \" + mathRound(this._b) + \")\" :\n          \"rgba(\" + mathRound(this._r) + \", \" + mathRound(this._g) + \", \" + mathRound(this._b) + \", \" + this._roundA + \")\";\n    },\n    toPercentageRgb: function() {\n        return { r: mathRound(bound01(this._r, 255) * 100) + \"%\", g: mathRound(bound01(this._g, 255) * 100) + \"%\", b: mathRound(bound01(this._b, 255) * 100) + \"%\", a: this._a };\n    },\n    toPercentageRgbString: function() {\n        return (this._a == 1) ?\n          \"rgb(\"  + mathRound(bound01(this._r, 255) * 100) + \"%, \" + mathRound(bound01(this._g, 255) * 100) + \"%, \" + mathRound(bound01(this._b, 255) * 100) + \"%)\" :\n          \"rgba(\" + mathRound(bound01(this._r, 255) * 100) + \"%, \" + mathRound(bound01(this._g, 255) * 100) + \"%, \" + mathRound(bound01(this._b, 255) * 100) + \"%, \" + this._roundA + \")\";\n    },\n    toName: function() {\n        if (this._a === 0) {\n            return \"transparent\";\n        }\n\n        if (this._a < 1) {\n            return false;\n        }\n\n        return hexNames[rgbToHex(this._r, this._g, this._b, true)] || false;\n    },\n    toFilter: function(secondColor) {\n        var hex8String = '#' + rgbaToArgbHex(this._r, this._g, this._b, this._a);\n        var secondHex8String = hex8String;\n        var gradientType = this._gradientType ? \"GradientType = 1, \" : \"\";\n\n        if (secondColor) {\n            var s = tinycolor(secondColor);\n            secondHex8String = '#' + rgbaToArgbHex(s._r, s._g, s._b, s._a);\n        }\n\n        return \"progid:DXImageTransform.Microsoft.gradient(\"+gradientType+\"startColorstr=\"+hex8String+\",endColorstr=\"+secondHex8String+\")\";\n    },\n    toString: function(format) {\n        var formatSet = !!format;\n        format = format || this._format;\n\n        var formattedString = false;\n        var hasAlpha = this._a < 1 && this._a >= 0;\n        var needsAlphaFormat = !formatSet && hasAlpha && (format === \"hex\" || format === \"hex6\" || format === \"hex3\" || format === \"hex4\" || format === \"hex8\" || format === \"name\");\n\n        if (needsAlphaFormat) {\n            // Special case for \"transparent\", all other non-alpha formats\n            // will return rgba when there is transparency.\n            if (format === \"name\" && this._a === 0) {\n                return this.toName();\n            }\n            return this.toRgbString();\n        }\n        if (format === \"rgb\") {\n            formattedString = this.toRgbString();\n        }\n        if (format === \"prgb\") {\n            formattedString = this.toPercentageRgbString();\n        }\n        if (format === \"hex\" || format === \"hex6\") {\n            formattedString = this.toHexString();\n        }\n        if (format === \"hex3\") {\n            formattedString = this.toHexString(true);\n        }\n        if (format === \"hex4\") {\n            formattedString = this.toHex8String(true);\n        }\n        if (format === \"hex8\") {\n            formattedString = this.toHex8String();\n        }\n        if (format === \"name\") {\n            formattedString = this.toName();\n        }\n        if (format === \"hsl\") {\n            formattedString = this.toHslString();\n        }\n        if (format === \"hsv\") {\n            formattedString = this.toHsvString();\n        }\n\n        return formattedString || this.toHexString();\n    },\n    clone: function() {\n        return tinycolor(this.toString());\n    },\n\n    _applyModification: function(fn, args) {\n        var color = fn.apply(null, [this].concat([].slice.call(args)));\n        this._r = color._r;\n        this._g = color._g;\n        this._b = color._b;\n        this.setAlpha(color._a);\n        return this;\n    },\n    lighten: function() {\n        return this._applyModification(lighten, arguments);\n    },\n    brighten: function() {\n        return this._applyModification(brighten, arguments);\n    },\n    darken: function() {\n        return this._applyModification(darken, arguments);\n    },\n    desaturate: function() {\n        return this._applyModification(desaturate, arguments);\n    },\n    saturate: function() {\n        return this._applyModification(saturate, arguments);\n    },\n    greyscale: function() {\n        return this._applyModification(greyscale, arguments);\n    },\n    spin: function() {\n        return this._applyModification(spin, arguments);\n    },\n\n    _applyCombination: function(fn, args) {\n        return fn.apply(null, [this].concat([].slice.call(args)));\n    },\n    analogous: function() {\n        return this._applyCombination(analogous, arguments);\n    },\n    complement: function() {\n        return this._applyCombination(complement, arguments);\n    },\n    monochromatic: function() {\n        return this._applyCombination(monochromatic, arguments);\n    },\n    splitcomplement: function() {\n        return this._applyCombination(splitcomplement, arguments);\n    },\n    triad: function() {\n        return this._applyCombination(triad, arguments);\n    },\n    tetrad: function() {\n        return this._applyCombination(tetrad, arguments);\n    }\n};\n\n// If input is an object, force 1 into \"1.0\" to handle ratios properly\n// String input requires \"1.0\" as input, so 1 will be treated as 1\ntinycolor.fromRatio = function(color, opts) {\n    if (typeof color == \"object\") {\n        var newColor = {};\n        for (var i in color) {\n            if (color.hasOwnProperty(i)) {\n                if (i === \"a\") {\n                    newColor[i] = color[i];\n                }\n                else {\n                    newColor[i] = convertToPercentage(color[i]);\n                }\n            }\n        }\n        color = newColor;\n    }\n\n    return tinycolor(color, opts);\n};\n\n// Given a string or object, convert that input to RGB\n// Possible string inputs:\n//\n//     \"red\"\n//     \"#f00\" or \"f00\"\n//     \"#ff0000\" or \"ff0000\"\n//     \"#ff000000\" or \"ff000000\"\n//     \"rgb 255 0 0\" or \"rgb (255, 0, 0)\"\n//     \"rgb 1.0 0 0\" or \"rgb (1, 0, 0)\"\n//     \"rgba (255, 0, 0, 1)\" or \"rgba 255, 0, 0, 1\"\n//     \"rgba (1.0, 0, 0, 1)\" or \"rgba 1.0, 0, 0, 1\"\n//     \"hsl(0, 100%, 50%)\" or \"hsl 0 100% 50%\"\n//     \"hsla(0, 100%, 50%, 1)\" or \"hsla 0 100% 50%, 1\"\n//     \"hsv(0, 100%, 100%)\" or \"hsv 0 100% 100%\"\n//\nfunction inputToRGB(color) {\n\n    var rgb = { r: 0, g: 0, b: 0 };\n    var a = 1;\n    var s = null;\n    var v = null;\n    var l = null;\n    var ok = false;\n    var format = false;\n\n    if (typeof color == \"string\") {\n        color = stringInputToObject(color);\n    }\n\n    if (typeof color == \"object\") {\n        if (isValidCSSUnit(color.r) && isValidCSSUnit(color.g) && isValidCSSUnit(color.b)) {\n            rgb = rgbToRgb(color.r, color.g, color.b);\n            ok = true;\n            format = String(color.r).substr(-1) === \"%\" ? \"prgb\" : \"rgb\";\n        }\n        else if (isValidCSSUnit(color.h) && isValidCSSUnit(color.s) && isValidCSSUnit(color.v)) {\n            s = convertToPercentage(color.s);\n            v = convertToPercentage(color.v);\n            rgb = hsvToRgb(color.h, s, v);\n            ok = true;\n            format = \"hsv\";\n        }\n        else if (isValidCSSUnit(color.h) && isValidCSSUnit(color.s) && isValidCSSUnit(color.l)) {\n            s = convertToPercentage(color.s);\n            l = convertToPercentage(color.l);\n            rgb = hslToRgb(color.h, s, l);\n            ok = true;\n            format = \"hsl\";\n        }\n\n        if (color.hasOwnProperty(\"a\")) {\n            a = color.a;\n        }\n    }\n\n    a = boundAlpha(a);\n\n    return {\n        ok: ok,\n        format: color.format || format,\n        r: mathMin(255, mathMax(rgb.r, 0)),\n        g: mathMin(255, mathMax(rgb.g, 0)),\n        b: mathMin(255, mathMax(rgb.b, 0)),\n        a: a\n    };\n}\n\n\n// Conversion Functions\n// --------------------\n\n// `rgbToHsl`, `rgbToHsv`, `hslToRgb`, `hsvToRgb` modified from:\n// <http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript>\n\n// `rgbToRgb`\n// Handle bounds / percentage checking to conform to CSS color spec\n// <http://www.w3.org/TR/css3-color/>\n// *Assumes:* r, g, b in [0, 255] or [0, 1]\n// *Returns:* { r, g, b } in [0, 255]\nfunction rgbToRgb(r, g, b){\n    return {\n        r: bound01(r, 255) * 255,\n        g: bound01(g, 255) * 255,\n        b: bound01(b, 255) * 255\n    };\n}\n\n// `rgbToHsl`\n// Converts an RGB color value to HSL.\n// *Assumes:* r, g, and b are contained in [0, 255] or [0, 1]\n// *Returns:* { h, s, l } in [0,1]\nfunction rgbToHsl(r, g, b) {\n\n    r = bound01(r, 255);\n    g = bound01(g, 255);\n    b = bound01(b, 255);\n\n    var max = mathMax(r, g, b), min = mathMin(r, g, b);\n    var h, s, l = (max + min) / 2;\n\n    if(max == min) {\n        h = s = 0; // achromatic\n    }\n    else {\n        var d = max - min;\n        s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n        switch(max) {\n            case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n            case g: h = (b - r) / d + 2; break;\n            case b: h = (r - g) / d + 4; break;\n        }\n\n        h /= 6;\n    }\n\n    return { h: h, s: s, l: l };\n}\n\n// `hslToRgb`\n// Converts an HSL color value to RGB.\n// *Assumes:* h is contained in [0, 1] or [0, 360] and s and l are contained [0, 1] or [0, 100]\n// *Returns:* { r, g, b } in the set [0, 255]\nfunction hslToRgb(h, s, l) {\n    var r, g, b;\n\n    h = bound01(h, 360);\n    s = bound01(s, 100);\n    l = bound01(l, 100);\n\n    function hue2rgb(p, q, t) {\n        if(t < 0) t += 1;\n        if(t > 1) t -= 1;\n        if(t < 1/6) return p + (q - p) * 6 * t;\n        if(t < 1/2) return q;\n        if(t < 2/3) return p + (q - p) * (2/3 - t) * 6;\n        return p;\n    }\n\n    if(s === 0) {\n        r = g = b = l; // achromatic\n    }\n    else {\n        var q = l < 0.5 ? l * (1 + s) : l + s - l * s;\n        var p = 2 * l - q;\n        r = hue2rgb(p, q, h + 1/3);\n        g = hue2rgb(p, q, h);\n        b = hue2rgb(p, q, h - 1/3);\n    }\n\n    return { r: r * 255, g: g * 255, b: b * 255 };\n}\n\n// `rgbToHsv`\n// Converts an RGB color value to HSV\n// *Assumes:* r, g, and b are contained in the set [0, 255] or [0, 1]\n// *Returns:* { h, s, v } in [0,1]\nfunction rgbToHsv(r, g, b) {\n\n    r = bound01(r, 255);\n    g = bound01(g, 255);\n    b = bound01(b, 255);\n\n    var max = mathMax(r, g, b), min = mathMin(r, g, b);\n    var h, s, v = max;\n\n    var d = max - min;\n    s = max === 0 ? 0 : d / max;\n\n    if(max == min) {\n        h = 0; // achromatic\n    }\n    else {\n        switch(max) {\n            case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n            case g: h = (b - r) / d + 2; break;\n            case b: h = (r - g) / d + 4; break;\n        }\n        h /= 6;\n    }\n    return { h: h, s: s, v: v };\n}\n\n// `hsvToRgb`\n// Converts an HSV color value to RGB.\n// *Assumes:* h is contained in [0, 1] or [0, 360] and s and v are contained in [0, 1] or [0, 100]\n// *Returns:* { r, g, b } in the set [0, 255]\n function hsvToRgb(h, s, v) {\n\n    h = bound01(h, 360) * 6;\n    s = bound01(s, 100);\n    v = bound01(v, 100);\n\n    var i = Math.floor(h),\n        f = h - i,\n        p = v * (1 - s),\n        q = v * (1 - f * s),\n        t = v * (1 - (1 - f) * s),\n        mod = i % 6,\n        r = [v, q, p, p, t, v][mod],\n        g = [t, v, v, q, p, p][mod],\n        b = [p, p, t, v, v, q][mod];\n\n    return { r: r * 255, g: g * 255, b: b * 255 };\n}\n\n// `rgbToHex`\n// Converts an RGB color to hex\n// Assumes r, g, and b are contained in the set [0, 255]\n// Returns a 3 or 6 character hex\nfunction rgbToHex(r, g, b, allow3Char) {\n\n    var hex = [\n        pad2(mathRound(r).toString(16)),\n        pad2(mathRound(g).toString(16)),\n        pad2(mathRound(b).toString(16))\n    ];\n\n    // Return a 3 character hex if possible\n    if (allow3Char && hex[0].charAt(0) == hex[0].charAt(1) && hex[1].charAt(0) == hex[1].charAt(1) && hex[2].charAt(0) == hex[2].charAt(1)) {\n        return hex[0].charAt(0) + hex[1].charAt(0) + hex[2].charAt(0);\n    }\n\n    return hex.join(\"\");\n}\n\n// `rgbaToHex`\n// Converts an RGBA color plus alpha transparency to hex\n// Assumes r, g, b are contained in the set [0, 255] and\n// a in [0, 1]. Returns a 4 or 8 character rgba hex\nfunction rgbaToHex(r, g, b, a, allow4Char) {\n\n    var hex = [\n        pad2(mathRound(r).toString(16)),\n        pad2(mathRound(g).toString(16)),\n        pad2(mathRound(b).toString(16)),\n        pad2(convertDecimalToHex(a))\n    ];\n\n    // Return a 4 character hex if possible\n    if (allow4Char && hex[0].charAt(0) == hex[0].charAt(1) && hex[1].charAt(0) == hex[1].charAt(1) && hex[2].charAt(0) == hex[2].charAt(1) && hex[3].charAt(0) == hex[3].charAt(1)) {\n        return hex[0].charAt(0) + hex[1].charAt(0) + hex[2].charAt(0) + hex[3].charAt(0);\n    }\n\n    return hex.join(\"\");\n}\n\n// `rgbaToArgbHex`\n// Converts an RGBA color to an ARGB Hex8 string\n// Rarely used, but required for \"toFilter()\"\nfunction rgbaToArgbHex(r, g, b, a) {\n\n    var hex = [\n        pad2(convertDecimalToHex(a)),\n        pad2(mathRound(r).toString(16)),\n        pad2(mathRound(g).toString(16)),\n        pad2(mathRound(b).toString(16))\n    ];\n\n    return hex.join(\"\");\n}\n\n// `equals`\n// Can be called with any tinycolor input\ntinycolor.equals = function (color1, color2) {\n    if (!color1 || !color2) { return false; }\n    return tinycolor(color1).toRgbString() == tinycolor(color2).toRgbString();\n};\n\ntinycolor.random = function() {\n    return tinycolor.fromRatio({\n        r: mathRandom(),\n        g: mathRandom(),\n        b: mathRandom()\n    });\n};\n\n\n// Modification Functions\n// ----------------------\n// Thanks to less.js for some of the basics here\n// <https://github.com/cloudhead/less.js/blob/master/lib/less/functions.js>\n\nfunction desaturate(color, amount) {\n    amount = (amount === 0) ? 0 : (amount || 10);\n    var hsl = tinycolor(color).toHsl();\n    hsl.s -= amount / 100;\n    hsl.s = clamp01(hsl.s);\n    return tinycolor(hsl);\n}\n\nfunction saturate(color, amount) {\n    amount = (amount === 0) ? 0 : (amount || 10);\n    var hsl = tinycolor(color).toHsl();\n    hsl.s += amount / 100;\n    hsl.s = clamp01(hsl.s);\n    return tinycolor(hsl);\n}\n\nfunction greyscale(color) {\n    return tinycolor(color).desaturate(100);\n}\n\nfunction lighten (color, amount) {\n    amount = (amount === 0) ? 0 : (amount || 10);\n    var hsl = tinycolor(color).toHsl();\n    hsl.l += amount / 100;\n    hsl.l = clamp01(hsl.l);\n    return tinycolor(hsl);\n}\n\nfunction brighten(color, amount) {\n    amount = (amount === 0) ? 0 : (amount || 10);\n    var rgb = tinycolor(color).toRgb();\n    rgb.r = mathMax(0, mathMin(255, rgb.r - mathRound(255 * - (amount / 100))));\n    rgb.g = mathMax(0, mathMin(255, rgb.g - mathRound(255 * - (amount / 100))));\n    rgb.b = mathMax(0, mathMin(255, rgb.b - mathRound(255 * - (amount / 100))));\n    return tinycolor(rgb);\n}\n\nfunction darken (color, amount) {\n    amount = (amount === 0) ? 0 : (amount || 10);\n    var hsl = tinycolor(color).toHsl();\n    hsl.l -= amount / 100;\n    hsl.l = clamp01(hsl.l);\n    return tinycolor(hsl);\n}\n\n// Spin takes a positive or negative amount within [-360, 360] indicating the change of hue.\n// Values outside of this range will be wrapped into this range.\nfunction spin(color, amount) {\n    var hsl = tinycolor(color).toHsl();\n    var hue = (hsl.h + amount) % 360;\n    hsl.h = hue < 0 ? 360 + hue : hue;\n    return tinycolor(hsl);\n}\n\n// Combination Functions\n// ---------------------\n// Thanks to jQuery xColor for some of the ideas behind these\n// <https://github.com/infusion/jQuery-xcolor/blob/master/jquery.xcolor.js>\n\nfunction complement(color) {\n    var hsl = tinycolor(color).toHsl();\n    hsl.h = (hsl.h + 180) % 360;\n    return tinycolor(hsl);\n}\n\nfunction triad(color) {\n    var hsl = tinycolor(color).toHsl();\n    var h = hsl.h;\n    return [\n        tinycolor(color),\n        tinycolor({ h: (h + 120) % 360, s: hsl.s, l: hsl.l }),\n        tinycolor({ h: (h + 240) % 360, s: hsl.s, l: hsl.l })\n    ];\n}\n\nfunction tetrad(color) {\n    var hsl = tinycolor(color).toHsl();\n    var h = hsl.h;\n    return [\n        tinycolor(color),\n        tinycolor({ h: (h + 90) % 360, s: hsl.s, l: hsl.l }),\n        tinycolor({ h: (h + 180) % 360, s: hsl.s, l: hsl.l }),\n        tinycolor({ h: (h + 270) % 360, s: hsl.s, l: hsl.l })\n    ];\n}\n\nfunction splitcomplement(color) {\n    var hsl = tinycolor(color).toHsl();\n    var h = hsl.h;\n    return [\n        tinycolor(color),\n        tinycolor({ h: (h + 72) % 360, s: hsl.s, l: hsl.l}),\n        tinycolor({ h: (h + 216) % 360, s: hsl.s, l: hsl.l})\n    ];\n}\n\nfunction analogous(color, results, slices) {\n    results = results || 6;\n    slices = slices || 30;\n\n    var hsl = tinycolor(color).toHsl();\n    var part = 360 / slices;\n    var ret = [tinycolor(color)];\n\n    for (hsl.h = ((hsl.h - (part * results >> 1)) + 720) % 360; --results; ) {\n        hsl.h = (hsl.h + part) % 360;\n        ret.push(tinycolor(hsl));\n    }\n    return ret;\n}\n\nfunction monochromatic(color, results) {\n    results = results || 6;\n    var hsv = tinycolor(color).toHsv();\n    var h = hsv.h, s = hsv.s, v = hsv.v;\n    var ret = [];\n    var modification = 1 / results;\n\n    while (results--) {\n        ret.push(tinycolor({ h: h, s: s, v: v}));\n        v = (v + modification) % 1;\n    }\n\n    return ret;\n}\n\n// Utility Functions\n// ---------------------\n\ntinycolor.mix = function(color1, color2, amount) {\n    amount = (amount === 0) ? 0 : (amount || 50);\n\n    var rgb1 = tinycolor(color1).toRgb();\n    var rgb2 = tinycolor(color2).toRgb();\n\n    var p = amount / 100;\n\n    var rgba = {\n        r: ((rgb2.r - rgb1.r) * p) + rgb1.r,\n        g: ((rgb2.g - rgb1.g) * p) + rgb1.g,\n        b: ((rgb2.b - rgb1.b) * p) + rgb1.b,\n        a: ((rgb2.a - rgb1.a) * p) + rgb1.a\n    };\n\n    return tinycolor(rgba);\n};\n\n\n// Readability Functions\n// ---------------------\n// <http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef (WCAG Version 2)\n\n// `contrast`\n// Analyze the 2 colors and returns the color contrast defined by (WCAG Version 2)\ntinycolor.readability = function(color1, color2) {\n    var c1 = tinycolor(color1);\n    var c2 = tinycolor(color2);\n    return (Math.max(c1.getLuminance(),c2.getLuminance())+0.05) / (Math.min(c1.getLuminance(),c2.getLuminance())+0.05);\n};\n\n// `isReadable`\n// Ensure that foreground and background color combinations meet WCAG2 guidelines.\n// The third argument is an optional Object.\n//      the 'level' property states 'AA' or 'AAA' - if missing or invalid, it defaults to 'AA';\n//      the 'size' property states 'large' or 'small' - if missing or invalid, it defaults to 'small'.\n// If the entire object is absent, isReadable defaults to {level:\"AA\",size:\"small\"}.\n\n// *Example*\n//    tinycolor.isReadable(\"#000\", \"#111\") => false\n//    tinycolor.isReadable(\"#000\", \"#111\",{level:\"AA\",size:\"large\"}) => false\ntinycolor.isReadable = function(color1, color2, wcag2) {\n    var readability = tinycolor.readability(color1, color2);\n    var wcag2Parms, out;\n\n    out = false;\n\n    wcag2Parms = validateWCAG2Parms(wcag2);\n    switch (wcag2Parms.level + wcag2Parms.size) {\n        case \"AAsmall\":\n        case \"AAAlarge\":\n            out = readability >= 4.5;\n            break;\n        case \"AAlarge\":\n            out = readability >= 3;\n            break;\n        case \"AAAsmall\":\n            out = readability >= 7;\n            break;\n    }\n    return out;\n\n};\n\n// `mostReadable`\n// Given a base color and a list of possible foreground or background\n// colors for that base, returns the most readable color.\n// Optionally returns Black or White if the most readable color is unreadable.\n// *Example*\n//    tinycolor.mostReadable(tinycolor.mostReadable(\"#123\", [\"#124\", \"#125\"],{includeFallbackColors:false}).toHexString(); // \"#112255\"\n//    tinycolor.mostReadable(tinycolor.mostReadable(\"#123\", [\"#124\", \"#125\"],{includeFallbackColors:true}).toHexString();  // \"#ffffff\"\n//    tinycolor.mostReadable(\"#a8015a\", [\"#faf3f3\"],{includeFallbackColors:true,level:\"AAA\",size:\"large\"}).toHexString(); // \"#faf3f3\"\n//    tinycolor.mostReadable(\"#a8015a\", [\"#faf3f3\"],{includeFallbackColors:true,level:\"AAA\",size:\"small\"}).toHexString(); // \"#ffffff\"\ntinycolor.mostReadable = function(baseColor, colorList, args) {\n    var bestColor = null;\n    var bestScore = 0;\n    var readability;\n    var includeFallbackColors, level, size ;\n    args = args || {};\n    includeFallbackColors = args.includeFallbackColors ;\n    level = args.level;\n    size = args.size;\n\n    for (var i= 0; i < colorList.length ; i++) {\n        readability = tinycolor.readability(baseColor, colorList[i]);\n        if (readability > bestScore) {\n            bestScore = readability;\n            bestColor = tinycolor(colorList[i]);\n        }\n    }\n\n    if (tinycolor.isReadable(baseColor, bestColor, {\"level\":level,\"size\":size}) || !includeFallbackColors) {\n        return bestColor;\n    }\n    else {\n        args.includeFallbackColors=false;\n        return tinycolor.mostReadable(baseColor,[\"#fff\", \"#000\"],args);\n    }\n};\n\n\n// Big List of Colors\n// ------------------\n// <http://www.w3.org/TR/css3-color/#svg-color>\nvar names = tinycolor.names = {\n    aliceblue: \"f0f8ff\",\n    antiquewhite: \"faebd7\",\n    aqua: \"0ff\",\n    aquamarine: \"7fffd4\",\n    azure: \"f0ffff\",\n    beige: \"f5f5dc\",\n    bisque: \"ffe4c4\",\n    black: \"000\",\n    blanchedalmond: \"ffebcd\",\n    blue: \"00f\",\n    blueviolet: \"8a2be2\",\n    brown: \"a52a2a\",\n    burlywood: \"deb887\",\n    burntsienna: \"ea7e5d\",\n    cadetblue: \"5f9ea0\",\n    chartreuse: \"7fff00\",\n    chocolate: \"d2691e\",\n    coral: \"ff7f50\",\n    cornflowerblue: \"6495ed\",\n    cornsilk: \"fff8dc\",\n    crimson: \"dc143c\",\n    cyan: \"0ff\",\n    darkblue: \"00008b\",\n    darkcyan: \"008b8b\",\n    darkgoldenrod: \"b8860b\",\n    darkgray: \"a9a9a9\",\n    darkgreen: \"006400\",\n    darkgrey: \"a9a9a9\",\n    darkkhaki: \"bdb76b\",\n    darkmagenta: \"8b008b\",\n    darkolivegreen: \"556b2f\",\n    darkorange: \"ff8c00\",\n    darkorchid: \"9932cc\",\n    darkred: \"8b0000\",\n    darksalmon: \"e9967a\",\n    darkseagreen: \"8fbc8f\",\n    darkslateblue: \"483d8b\",\n    darkslategray: \"2f4f4f\",\n    darkslategrey: \"2f4f4f\",\n    darkturquoise: \"00ced1\",\n    darkviolet: \"9400d3\",\n    deeppink: \"ff1493\",\n    deepskyblue: \"00bfff\",\n    dimgray: \"696969\",\n    dimgrey: \"696969\",\n    dodgerblue: \"1e90ff\",\n    firebrick: \"b22222\",\n    floralwhite: \"fffaf0\",\n    forestgreen: \"228b22\",\n    fuchsia: \"f0f\",\n    gainsboro: \"dcdcdc\",\n    ghostwhite: \"f8f8ff\",\n    gold: \"ffd700\",\n    goldenrod: \"daa520\",\n    gray: \"808080\",\n    green: \"008000\",\n    greenyellow: \"adff2f\",\n    grey: \"808080\",\n    honeydew: \"f0fff0\",\n    hotpink: \"ff69b4\",\n    indianred: \"cd5c5c\",\n    indigo: \"4b0082\",\n    ivory: \"fffff0\",\n    khaki: \"f0e68c\",\n    lavender: \"e6e6fa\",\n    lavenderblush: \"fff0f5\",\n    lawngreen: \"7cfc00\",\n    lemonchiffon: \"fffacd\",\n    lightblue: \"add8e6\",\n    lightcoral: \"f08080\",\n    lightcyan: \"e0ffff\",\n    lightgoldenrodyellow: \"fafad2\",\n    lightgray: \"d3d3d3\",\n    lightgreen: \"90ee90\",\n    lightgrey: \"d3d3d3\",\n    lightpink: \"ffb6c1\",\n    lightsalmon: \"ffa07a\",\n    lightseagreen: \"20b2aa\",\n    lightskyblue: \"87cefa\",\n    lightslategray: \"789\",\n    lightslategrey: \"789\",\n    lightsteelblue: \"b0c4de\",\n    lightyellow: \"ffffe0\",\n    lime: \"0f0\",\n    limegreen: \"32cd32\",\n    linen: \"faf0e6\",\n    magenta: \"f0f\",\n    maroon: \"800000\",\n    mediumaquamarine: \"66cdaa\",\n    mediumblue: \"0000cd\",\n    mediumorchid: \"ba55d3\",\n    mediumpurple: \"9370db\",\n    mediumseagreen: \"3cb371\",\n    mediumslateblue: \"7b68ee\",\n    mediumspringgreen: \"00fa9a\",\n    mediumturquoise: \"48d1cc\",\n    mediumvioletred: \"c71585\",\n    midnightblue: \"191970\",\n    mintcream: \"f5fffa\",\n    mistyrose: \"ffe4e1\",\n    moccasin: \"ffe4b5\",\n    navajowhite: \"ffdead\",\n    navy: \"000080\",\n    oldlace: \"fdf5e6\",\n    olive: \"808000\",\n    olivedrab: \"6b8e23\",\n    orange: \"ffa500\",\n    orangered: \"ff4500\",\n    orchid: \"da70d6\",\n    palegoldenrod: \"eee8aa\",\n    palegreen: \"98fb98\",\n    paleturquoise: \"afeeee\",\n    palevioletred: \"db7093\",\n    papayawhip: \"ffefd5\",\n    peachpuff: \"ffdab9\",\n    peru: \"cd853f\",\n    pink: \"ffc0cb\",\n    plum: \"dda0dd\",\n    powderblue: \"b0e0e6\",\n    purple: \"800080\",\n    rebeccapurple: \"663399\",\n    red: \"f00\",\n    rosybrown: \"bc8f8f\",\n    royalblue: \"4169e1\",\n    saddlebrown: \"8b4513\",\n    salmon: \"fa8072\",\n    sandybrown: \"f4a460\",\n    seagreen: \"2e8b57\",\n    seashell: \"fff5ee\",\n    sienna: \"a0522d\",\n    silver: \"c0c0c0\",\n    skyblue: \"87ceeb\",\n    slateblue: \"6a5acd\",\n    slategray: \"708090\",\n    slategrey: \"708090\",\n    snow: \"fffafa\",\n    springgreen: \"00ff7f\",\n    steelblue: \"4682b4\",\n    tan: \"d2b48c\",\n    teal: \"008080\",\n    thistle: \"d8bfd8\",\n    tomato: \"ff6347\",\n    turquoise: \"40e0d0\",\n    violet: \"ee82ee\",\n    wheat: \"f5deb3\",\n    white: \"fff\",\n    whitesmoke: \"f5f5f5\",\n    yellow: \"ff0\",\n    yellowgreen: \"9acd32\"\n};\n\n// Make it easy to access colors via `hexNames[hex]`\nvar hexNames = tinycolor.hexNames = flip(names);\n\n\n// Utilities\n// ---------\n\n// `{ 'name1': 'val1' }` becomes `{ 'val1': 'name1' }`\nfunction flip(o) {\n    var flipped = { };\n    for (var i in o) {\n        if (o.hasOwnProperty(i)) {\n            flipped[o[i]] = i;\n        }\n    }\n    return flipped;\n}\n\n// Return a valid alpha value [0,1] with all invalid values being set to 1\nfunction boundAlpha(a) {\n    a = parseFloat(a);\n\n    if (isNaN(a) || a < 0 || a > 1) {\n        a = 1;\n    }\n\n    return a;\n}\n\n// Take input from [0, n] and return it as [0, 1]\nfunction bound01(n, max) {\n    if (isOnePointZero(n)) { n = \"100%\"; }\n\n    var processPercent = isPercentage(n);\n    n = mathMin(max, mathMax(0, parseFloat(n)));\n\n    // Automatically convert percentage into number\n    if (processPercent) {\n        n = parseInt(n * max, 10) / 100;\n    }\n\n    // Handle floating point rounding errors\n    if ((Math.abs(n - max) < 0.000001)) {\n        return 1;\n    }\n\n    // Convert into [0, 1] range if it isn't already\n    return (n % max) / parseFloat(max);\n}\n\n// Force a number between 0 and 1\nfunction clamp01(val) {\n    return mathMin(1, mathMax(0, val));\n}\n\n// Parse a base-16 hex value into a base-10 integer\nfunction parseIntFromHex(val) {\n    return parseInt(val, 16);\n}\n\n// Need to handle 1.0 as 100%, since once it is a number, there is no difference between it and 1\n// <http://stackoverflow.com/questions/7422072/javascript-how-to-detect-number-as-a-decimal-including-1-0>\nfunction isOnePointZero(n) {\n    return typeof n == \"string\" && n.indexOf('.') != -1 && parseFloat(n) === 1;\n}\n\n// Check to see if string passed in is a percentage\nfunction isPercentage(n) {\n    return typeof n === \"string\" && n.indexOf('%') != -1;\n}\n\n// Force a hex value to have 2 characters\nfunction pad2(c) {\n    return c.length == 1 ? '0' + c : '' + c;\n}\n\n// Replace a decimal with it's percentage value\nfunction convertToPercentage(n) {\n    if (n <= 1) {\n        n = (n * 100) + \"%\";\n    }\n\n    return n;\n}\n\n// Converts a decimal to a hex value\nfunction convertDecimalToHex(d) {\n    return Math.round(parseFloat(d) * 255).toString(16);\n}\n// Converts a hex value to a decimal\nfunction convertHexToDecimal(h) {\n    return (parseIntFromHex(h) / 255);\n}\n\nvar matchers = (function() {\n\n    // <http://www.w3.org/TR/css3-values/#integers>\n    var CSS_INTEGER = \"[-\\\\+]?\\\\d+%?\";\n\n    // <http://www.w3.org/TR/css3-values/#number-value>\n    var CSS_NUMBER = \"[-\\\\+]?\\\\d*\\\\.\\\\d+%?\";\n\n    // Allow positive/negative integer/number.  Don't capture the either/or, just the entire outcome.\n    var CSS_UNIT = \"(?:\" + CSS_NUMBER + \")|(?:\" + CSS_INTEGER + \")\";\n\n    // Actual matching.\n    // Parentheses and commas are optional, but not required.\n    // Whitespace can take the place of commas or opening paren\n    var PERMISSIVE_MATCH3 = \"[\\\\s|\\\\(]+(\" + CSS_UNIT + \")[,|\\\\s]+(\" + CSS_UNIT + \")[,|\\\\s]+(\" + CSS_UNIT + \")\\\\s*\\\\)?\";\n    var PERMISSIVE_MATCH4 = \"[\\\\s|\\\\(]+(\" + CSS_UNIT + \")[,|\\\\s]+(\" + CSS_UNIT + \")[,|\\\\s]+(\" + CSS_UNIT + \")[,|\\\\s]+(\" + CSS_UNIT + \")\\\\s*\\\\)?\";\n\n    return {\n        CSS_UNIT: new RegExp(CSS_UNIT),\n        rgb: new RegExp(\"rgb\" + PERMISSIVE_MATCH3),\n        rgba: new RegExp(\"rgba\" + PERMISSIVE_MATCH4),\n        hsl: new RegExp(\"hsl\" + PERMISSIVE_MATCH3),\n        hsla: new RegExp(\"hsla\" + PERMISSIVE_MATCH4),\n        hsv: new RegExp(\"hsv\" + PERMISSIVE_MATCH3),\n        hsva: new RegExp(\"hsva\" + PERMISSIVE_MATCH4),\n        hex3: /^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/,\n        hex6: /^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/,\n        hex4: /^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/,\n        hex8: /^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/\n    };\n})();\n\n// `isValidCSSUnit`\n// Take in a single string / number and check to see if it looks like a CSS unit\n// (see `matchers` above for definition).\nfunction isValidCSSUnit(color) {\n    return !!matchers.CSS_UNIT.exec(color);\n}\n\n// `stringInputToObject`\n// Permissive string parsing.  Take in a number of formats, and output an object\n// based on detected format.  Returns `{ r, g, b }` or `{ h, s, l }` or `{ h, s, v}`\nfunction stringInputToObject(color) {\n\n    color = color.replace(trimLeft,'').replace(trimRight, '').toLowerCase();\n    var named = false;\n    if (names[color]) {\n        color = names[color];\n        named = true;\n    }\n    else if (color == 'transparent') {\n        return { r: 0, g: 0, b: 0, a: 0, format: \"name\" };\n    }\n\n    // Try to match string input using regular expressions.\n    // Keep most of the number bounding out of this function - don't worry about [0,1] or [0,100] or [0,360]\n    // Just return an object and let the conversion functions handle that.\n    // This way the result will be the same whether the tinycolor is initialized with string or object.\n    var match;\n    if ((match = matchers.rgb.exec(color))) {\n        return { r: match[1], g: match[2], b: match[3] };\n    }\n    if ((match = matchers.rgba.exec(color))) {\n        return { r: match[1], g: match[2], b: match[3], a: match[4] };\n    }\n    if ((match = matchers.hsl.exec(color))) {\n        return { h: match[1], s: match[2], l: match[3] };\n    }\n    if ((match = matchers.hsla.exec(color))) {\n        return { h: match[1], s: match[2], l: match[3], a: match[4] };\n    }\n    if ((match = matchers.hsv.exec(color))) {\n        return { h: match[1], s: match[2], v: match[3] };\n    }\n    if ((match = matchers.hsva.exec(color))) {\n        return { h: match[1], s: match[2], v: match[3], a: match[4] };\n    }\n    if ((match = matchers.hex8.exec(color))) {\n        return {\n            r: parseIntFromHex(match[1]),\n            g: parseIntFromHex(match[2]),\n            b: parseIntFromHex(match[3]),\n            a: convertHexToDecimal(match[4]),\n            format: named ? \"name\" : \"hex8\"\n        };\n    }\n    if ((match = matchers.hex6.exec(color))) {\n        return {\n            r: parseIntFromHex(match[1]),\n            g: parseIntFromHex(match[2]),\n            b: parseIntFromHex(match[3]),\n            format: named ? \"name\" : \"hex\"\n        };\n    }\n    if ((match = matchers.hex4.exec(color))) {\n        return {\n            r: parseIntFromHex(match[1] + '' + match[1]),\n            g: parseIntFromHex(match[2] + '' + match[2]),\n            b: parseIntFromHex(match[3] + '' + match[3]),\n            a: convertHexToDecimal(match[4] + '' + match[4]),\n            format: named ? \"name\" : \"hex8\"\n        };\n    }\n    if ((match = matchers.hex3.exec(color))) {\n        return {\n            r: parseIntFromHex(match[1] + '' + match[1]),\n            g: parseIntFromHex(match[2] + '' + match[2]),\n            b: parseIntFromHex(match[3] + '' + match[3]),\n            format: named ? \"name\" : \"hex\"\n        };\n    }\n\n    return false;\n}\n\nfunction validateWCAG2Parms(parms) {\n    // return valid WCAG2 parms for isReadable.\n    // If input parms are invalid, return {\"level\":\"AA\", \"size\":\"small\"}\n    var level, size;\n    parms = parms || {\"level\":\"AA\", \"size\":\"small\"};\n    level = (parms.level || \"AA\").toUpperCase();\n    size = (parms.size || \"small\").toLowerCase();\n    if (level !== \"AA\" && level !== \"AAA\") {\n        level = \"AA\";\n    }\n    if (size !== \"small\" && size !== \"large\") {\n        size = \"small\";\n    }\n    return {\"level\":level, \"size\":size};\n}\n\n// Node: Export function\nif (typeof module !== \"undefined\" && module.exports) {\n    module.exports = tinycolor;\n}\n// AMD/requirejs: Define the module\nelse if (typeof define === 'function' && define.amd) {\n    define(function () {return tinycolor;});\n}\n// Browser: Expose to window\nelse {\n    window.tinycolor = tinycolor;\n}\n\n})(Math);\n","// Copyright © 2016 RTE Réseau de transport d’électricité\n(function() {\n  var d3 = require(\"d3\");\n  var minicharts = require(\"minicharts\");\n  var utils = require(\"./utils.js\");\n\n  L.Minichart = L.CircleMarker.extend({\n    /** Options used to initialize/update a Minichart object.\n      * @typedef {object} MinichartOptions\n      * @memberOf 'L.Minichart'\n      * @prop {string} [type = \"bar\"]\n      * Type of chart to create. Possible values are \"bar\" for barcharts, \"pie\"\n      * for pie charts, \"polar-radius\" and \"polar-area\" for polar area charts\n      * where values are represented either by the radius or the area of the\n      * slices.\n      * @prop {number[]} [data = [1]]\n      * Data values the chart has to represent.\n      * @prop {number[]|\"auto\"} [maxValues = \"auto\"]\n      * maximal absolute value the data could take. It can be a single numeric\n      * value or an array of values with same length as data. In the first case,\n      * all values will be represented with the same scale while in the second\n      * case, each value will have its own scale. This is useful when one wants\n      * to represent multiple variables that are not comparable. If it equals to\n      * \"auto\" (the default) then the maximum absolute value in data is used.\n      * @prop {string[]} [colors=d3.schemeCategory10] Array of colors. If its\n      * length is less than the length of data, colors are recycled.\n      * @prop {number} [width=60]\n      * Width of the chart when `type` equals 'bar' or maximal diameter of the\n      * chart for all other types.\n      * @prop {number} [height=60]\n      * Maximal height of barcharts.\n      * @prop {string[]|\"none\"|\"auto\"}[labels=\"none\"]\n      * Labels to display on the chart. If it equals to \"auto\" then data values\n      * are displayed in a compact way.\n      * @prop {number} [labelMinSize=8]\n      * Labels are automatically hidden if the label height is less than this number.\n      * @prop {number} [labelMaxSize=24]\n      * Maximal height of labels in pixels.\n      * @prop {number} [labelPadding=2]\n      * Padding to apply to labels.\n      * @prop {string} [labelStyle=\"font-family:sans-serif\"]\n      * CSS style to apply to labels\n      * @prop {string} [labelColor=\"auto\"]\n      * Color to apply to labels. If \"auto\", text will be black or white\n      * depending on the background color.\n      * @prop {number} [transitionTime=750]\n      * Duration in millisecondq of transitions.\n      *\n      */\n    options: {\n      type: \"bar\",\n      data: [1],\n      maxValues: \"auto\",\n      colors: d3.schemeCategory10,\n      width: 60,\n      height: 60,\n      opacity: 1,\n      labels:\"none\",\n      labelMinSize: 8,\n      labelMaxSize: 24,\n      labelPadding: 2,\n      labelColor: \"auto\",\n      labelStyle: \"font-family:sans-serif\",\n      transitionTime: 750\n    },\n\n    /**\n      * @class 'L.Minichart'\n      * @summary add add bar, pie and polar charts to a leaflet map\n      * @desc L.Minichart is used to add dynamic charts on a leaflet map. It is specially\n      * useful to represent multiple data values associated to some geographical\n      * coordinates.\n      *\n      * @example\n      *\n      * L.minichart([0, 0], {data: [1, 2, 3], maxValues: 3})\n      *\n      * @param {L.Point} center\n      * @param {MinichartOptions} options - Object containing\n      * options to construct a chart.\n      */\n    initialize: function(center, options) {\n      this._center = center;\n      this._zoom = 0;\n      this.options = utils.mergeOptions(options, this.options);\n      L.CircleMarker.prototype.initialize.call(\n        this,\n        center,\n        {radius: this.options.width/2, stroke: false, fill: false}\n      );\n    },\n\n    onAdd: function(map) {\n      L.CircleMarker.prototype.onAdd.call(this, map);\n      // Change class of container so that the element hides when zooming\n      var container = this._container || this._renderer._rootGroup;\n      container.setAttribute(\"class\", \"leaflet-zoom-hide\");\n\n      // create the svg element that holds the chart\n      this._chart = d3.select(container).append(\"g\");\n\n      if (L.version >= \"1.0\") this.addInteractiveTarget(this._chart.node());\n\n      map.on('moveend', this._onMoveend, this);\n\n      this._redraw(true);\n    },\n\n    onRemove: function(map) {\n      // remove layer's DOM elements and listeners\n      L.CircleMarker.prototype.onRemove.call(this, map);\n      map.off('moveend', this._onMoveend, this);\n    },\n\n    _onMoveend: function() {\n      // Redraw chart only if zoom has changed\n      var oldZoom = this._zoom;\n      this._zoom = this._map.getZoom();\n      if (oldZoom != this._zoom) this._redraw() ;\n    },\n\n    /** Update the options of a minichart object.\n      * @method setOptions\n      * @instance\n      * @memberOf 'L.Minichart'\n      *\n      * @param {MinichartOptions} options - Object containing options to update the chart.\n      */\n    setOptions: function(options) {\n      var newChart = options.type && options.type != this.options.type;\n      this.options = utils.mergeOptions(options, this.options);\n      this._redraw(newChart);\n    },\n\n    _redraw: function(newChart) {\n      // Move container on the map\n      var c = this._map.latLngToLayerPoint(this._center);\n      var h;\n      if (this.options.type == \"bar\") {\n        h = this.options.height * 2;\n      } else {\n        h = this.options.width;\n      }\n      this._chart\n        .attr(\"transform\", \"translate(\" + (c.x - this.options.width / 2) + \",\" + (c.y - h / 2) + \")\")\n        .transition()\n        .duration(this.options.transitionTime)\n        .attr(\"opacity\", this.options.opacity);\n\n      // prepare data\n      var data = this.options.data;\n      data = utils.toArray(data);\n      for (var i = 0; i < data.length; i++) {\n        if (isNaN(data[i]) || !isFinite(data[i])) data[i] = 0;\n      }\n\n      // Max absolute value for each variable\n      var max = this.options.maxValues;\n      if (max === \"auto\") {\n        max = Math.max(\n          d3.max(data),\n          Math.abs(d3.min(data))\n        )\n      }\n      max = utils.toArray(max);\n\n      if(max.length !== 1 && max.length != data.length) {\n        throw new Error(\"'maxValues' should be a single number or have same length as 'data'\");\n      }\n\n      // Scale data. This step is essential to have different scales for each\n      // variable. Only relevant if chart is not a pie/\n      var dataScaled = [];\n\n      if (this.options.type == \"pie\") {\n        dataScaled = data;\n      } else {\n        for (var i = 0; i < data.length; i++) {\n          dataScaled.push(data[i] / max[i % max.length]);\n        }\n      }\n\n      // Prepare labels\n      var labels = this.options.labels;\n      if (labels === \"auto\") {\n        labels = utils.prettyNumbers(data);\n      }\n\n      // Generator function\n      var generator, type;\n      switch(this.options.type) {\n        case \"bar\":\n          generator = minicharts.Barchart;\n          break;\n        case \"pie\":\n          generator = minicharts.Piechart;\n          break;\n        case \"polar-radius\":\n          generator = minicharts.Polarchart;\n          type = \"radius\";\n          break;\n        case \"polar-area\":\n          generator = minicharts.Polarchart;\n          type = \"area\";\n          break;\n      }\n\n      // Graphical options for the generator function\n      var chartOpts = {\n        width: this.options.width,\n        height: this.options.height * 2, // Used only if type = \"bar\"\n        colors: this.options.colors,\n        type: type,\n        transitionTime: this.options.transitionTime,\n        minValue: -1,\n        maxValue:1,\n        labels: labels,\n        labelColors: this.options.labelColor,\n        labelMinSize: this.options.labelMinSize,\n        labelMaxSize: this.options.labelMaxSize,\n        labelPadding: this.options.labelPadding,\n        labelClass: \"leaflet-clickable leaflet-interactive\",\n        shapeClass: \"leaflet-clickable leaflet-interactive\"\n      };\n\n      // Create of update chart\n      if (newChart === true) {\n        this._chart.selectAll(\"*\").remove();\n        this._chartObject = new generator(this._chart.node(), dataScaled, chartOpts);\n      } else {\n        this._chartObject.update(dataScaled, chartOpts);\n      }\n    }\n  });\n\n  L.minichart = function(center, options) {\n  return new L.Minichart(center, options);\n};\n})();\n","(function() {\n  'use strict';\n\n  module.exports.mergeOptions = mergeOptions;\n  module.exports.toArray = toArray;\n  module.exports.toFunction = toFunction;\n  module.exports.prettyNumbers = function(numbers) {\n    return numbers.map(prettyNumber);\n  }\n\n  function mergeOptions(options, defaults) {\n    if (options) options = JSON.parse(JSON.stringify(options));\n    else options = {};\n    defaults = defaults || {};\n    for (var opt in defaults) {\n      if (defaults.hasOwnProperty(opt) && !options.hasOwnProperty(opt)) {\n        options[opt] = defaults[opt];\n      }\n    }\n    return options;\n  }\n\n  function toArray(x) {\n    if (x.constructor !== Array) x = [x];\n    return x;\n  }\n\n  function toFunction(x) {\n    if (typeof x === \"function\") return (x);\n    x = toArray(x);\n    return function(d, i) {return x[i % x.length]};\n  }\n\n  function prettyNumber(number) {\n    if (isNaN(number) || !isFinite(number)) return \"\";\n\n    var absVal = Math.abs(number);\n    var sign= number < 0? \"-\": \"\";\n    var scale;\n\n    if( absVal < 1000 ) {\n        scale = '';\n    } else if( absVal < 1000000 ) {\n        scale = 'K';\n        absVal = absVal/1000;\n\n    } else if( absVal < 1000000000 ) {\n        scale = 'M';\n        absVal = absVal/1000000;\n\n    } else if( absVal < 1000000000000 ) {\n        scale = 'B';\n        absVal = absVal/1000000000;\n\n    } else if( absVal < 1000000000000000 ) {\n        scale = 'T';\n        absVal = absVal/1000000000000;\n    }\n\n    if (absVal > 10) absVal = roundTo(absVal);\n    else if (absVal > 1) absVal = roundTo(absVal, 10, true);\n    else absVal = roundTo(absVal, 100, true);\n\n    return sign + absVal + scale;\n  }\n\n  function roundTo(number, to, inverse) {\n    to = to || 1;\n    if (inverse) return Math.round(number * to) / to;\n    else return Math.round(number / to) * to;\n  }\n}());\n"]} diff --git 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d=a("d3"),e=a("tinycolor2"),f=a("./utils.js"),g=a("./label.js");b.exports=c,c.prototype.update=function(a,b){this._data=a,this._options=this._processOptions(b),this._draw()},c.prototype.setOptions=function(a){this._options=this._processOptions(a),this._draw()},c.prototype.setData=function(a){this._data=a,this._draw()},c.prototype._draw=function(){var a=this;a._container.transition().duration(a._options.transitionTime).attr("width",a._options.width).attr("height",a._options.height)},c.prototype._processOptions=function(a){return a=f.mergeOptions(a,this._options),a.colorFun=f.toFunction(a.colors),a.labelClass=f.toFunction(a.labelClass),a.shapeClass=f.toFunction(a.shapeClass),"none"===a.labels?a.labelText=null:"auto"===a.labels?a.labelText=f.prettyNumber:a.labelText=f.toFunction(a.labels),"auto"===a.labelColors?a.labelColorFun=function(b,c){return 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c=this.innerSize().height*a;return this._minSize&&cthis._maxSize&&(a=this._maxSize/this.innerSize().height),this._label.transition().duration(b||0).attr("transform","scale("+a+")"),this._scale=a,this},c.prototype.fillRect=function(a,b,c,d,e,f,g,h){var i=this.innerSize();this.updateScale(Math.min((c-2*e)/i.width,Math.abs(d)/i.height),h);var j,k,l=this.size();switch(g){case"top":k=b+l.height/2;break;case"center":k=b+d/2;break;case"bottom":k=b+d-l.height/2}switch(f){case"left":j=a+e+l.width/2;break;case"center":j=a+c/2;break;case"right":j=a+c-e-l.width/2}return this.updatePosition(j,k,h),this},c.prototype.fillCircle=function(a,b){this.updatePosition(0,0,b);var c=this.innerSize(),d=c.height/c.width,e=2*a*Math.cos(Math.PI/2-Math.atan(d));this.updateScale(e/c.height,b)},c.prototype.fillSlice=function(a,b,c,f){var g=a.centroid(c);this.updatePosition(g[0],g[1],f);var h=this.innerSize(),i=h.height/h.width,j=new e.Line(g[1]-i*g[0],i),k=new e.Line(g[1]+i*g[0],-i),l=(new 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a=this._zoom;this._zoom=this._map.getZoom(),a!=this._zoom&&this._redraw()},setOptions:function(a){var b=a.type&&a.type!=this.options.type;this.options=d.mergeOptions(a,this.options),this._redraw(b)},_redraw:function(a){var e,f=this._map.latLngToLayerPoint(this._center);e="bar"==this.options.type?2*this.options.height:this.options.width,this._chart.attr("transform","translate("+(f.x-this.options.width/2)+","+(f.y-e/2)+")").transition().duration(this.options.transitionTime).attr("opacity",this.options.opacity);var g=this.options.data;g=d.toArray(g);for(var h=0;h10?f(c):c>1?f(c,10,!0):f(c,100,!0),d+c+b}function f(a,b,c){return b=b||1,c?Math.round(a*b)/b:Math.round(a/b)*b}b.exports.mergeOptions=a,b.exports.toArray=c,b.exports.toFunction=d,b.exports.prettyNumbers=function(a){return a.map(e)}}()},{}]},{},[11]); \ No newline at end of file diff --git a/src/minichart.js b/src/minichart.js index 7c4952c..4e4af7e 100644 --- a/src/minichart.js +++ b/src/minichart.js @@ -93,13 +93,16 @@ onAdd: function(map) { L.CircleMarker.prototype.onAdd.call(this, map); // Change class of container so that the element hides when zooming - var container = this._container || this._renderer._container; + var container = this._container || this._renderer._rootGroup; container.setAttribute("class", "leaflet-zoom-hide"); // create the svg element that holds the chart this._chart = d3.select(container).append("g"); + if (L.version >= "1.0") this.addInteractiveTarget(this._chart.node()); + map.on('moveend', this._onMoveend, this); + this._redraw(true); }, @@ -216,8 +219,8 @@ labelMinSize: this.options.labelMinSize, labelMaxSize: this.options.labelMaxSize, labelPadding: this.options.labelPadding, - labelClass: "leaflet-clickable", - shapeClass: "leaflet-clickable" + labelClass: "leaflet-clickable leaflet-interactive", + shapeClass: "leaflet-clickable leaflet-interactive" }; // Create of update chart