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drawNgon.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Space</title>
<style>
*{
padding:0px;
margin:0px;
}
</style>
<script type="text/javascript" src="Point.js"></script>
<script type="text/javascript" src="Poly.js"></script>
<script type="text/javascript" src="Polygon.js"></script>
<script type="text/javascript" src="HalfEdge.js"></script>
<script type="text/javascript" src="Triangulation.js"></script>
<script type="text/javascript" src="TreeNode.js"></script>
<script type="text/javascript" src="Tree.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery-contextmenu/2.5.0/jquery.contextMenu.min.js"></script>
<script type="text/javascript" src="main.js"></script>
<script type="text/javascript">
function onLoad(){
const canv = document.getElementById("canvas");
//canv.onclick = mouseClick;
canv.onmousemove = mouseMove;
canv.addEventListener('mousedown', mouseDown);
canv.addEventListener('mouseup', mouseUp);
window.c = canv.getContext('2d');
window.w = canv.width = window.innerWidth;
window.h = canv.height = window.innerHeight;
c.fillStyle = "#ffffff";
c.fillRect (0, 0, w, h);
}
</script>
</head>
<body onload="onLoad()">
<canvas id="canvas" resize hidpi="off" style="background:white"></canvas>
<div style="position:fixed; top:5px; left:5px; background-color:#ffffff; background-color:rgba(0,0,0,0.33); color:#ffffff; z-index:2; padding:6px; border-radius:6px;">
<div>
x: <span id="xDisplay"></span>
<br/>
y: <span id="yDisplay"></span>
<br/>
dragPoint: <span id="dragDisplay"></span>
</div>
<!--<div>
<button>triangulate</button>
</div>-->
</div>
<div style="position:fixed; background-color:#ffffff; background-color:rgba(0,0,0,0.66); color:#ffffff; z-index:2; padding:6px; border-radius:6px; text-align:center; visibility:hidden;" id="mouseHoverDisplay">
</div>
</body>
</html>