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cat-planet.html
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<!DOCTYPE html>
<html>
<head>
<title>02.02 - Basic textures</title>
<script src="../libs/three.js"></script>
<script src="../libs/OrbitControls.js"></script>
<script src="../libs/dat.gui.min.js"></script>
<script src="../libs/stats.min.js"></script>
<style>
body {
/* set margin to 0 and overflow to hidden, to go fullscreen */
margin: 0;
overflow: hidden;
}
</style>
</head>
<script>
// global variables
var renderer;
var scene;
var camera;
var control;
var stats;
var cameraControl;
/**
* Initializes the scene, camera and objects. Called when the window is
* loaded by using window.onload (see below)
*/
function init() {
// create a scene, that will hold all our elements such as objects, cameras and lights.
scene = new THREE.Scene();
// create a camera, which defines where we're looking at.
camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
// create a render, sets the background color and the size
renderer = new THREE.WebGLRenderer();
renderer.setClearColor(0x000000, 1.0);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.shadowMapEnabled = true;
// create a sphere
var sphereGeometry = new THREE.SphereGeometry(15, 60, 60);
var sphereMaterial = createEarthMaterial();
var earthMesh = new THREE.Mesh(sphereGeometry, sphereMaterial);
earthMesh.name = 'earth';
scene.add(earthMesh);
// create a cloudGeometry, slighly bigger than the original sphere
var cloudGeometry = new THREE.SphereGeometry(15.25, 60, 60);
var cloudMaterial = createCloudMaterial();
var cloudMesh = new THREE.Mesh(cloudGeometry, cloudMaterial);
cloudMesh.name = 'clouds';
scene.add(cloudMesh);
// position and point the camera to the center of the scene
camera.position.x = 25;
camera.position.y = 26;
camera.position.z = 23;
camera.lookAt(scene.position);
// add controls
cameraControl = new THREE.OrbitControls(camera);
// setup the control object for the control gui
control = new function () {
this.rotationSpeed = 0.001;
};
// add extras
addControlGui(control);
addStatsObject();
// add the output of the renderer to the html element
document.body.appendChild(renderer.domElement);
// call the render function, after the first render, interval is determined
// by requestAnimationFrame
render();
}
function createEarthMaterial() {
// 4096 is the maximum width for maps
var earthTexture = THREE.ImageUtils.loadTexture("../assets/textures/planets/1.jpg");
var earthMaterial = new THREE.MeshBasicMaterial();
earthMaterial.map = earthTexture;
return earthMaterial;
}
function createCloudMaterial() {
var cloudTexture = THREE.ImageUtils.loadTexture("../assets/textures/planets/fair_clouds_4k.png");
var cloudMaterial = new THREE.MeshBasicMaterial();
cloudMaterial.map = cloudTexture;
cloudMaterial.transparent = true;
return cloudMaterial;
}
function addControlGui(controlObject) {
var gui = new dat.GUI();
gui.add(controlObject, 'rotationSpeed', -0.01, 0.01);
}
function addStatsObject() {
stats = new Stats();
stats.setMode(0);
stats.domElement.style.position = 'absolute';
stats.domElement.style.left = '0px';
stats.domElement.style.top = '0px';
document.body.appendChild(stats.domElement);
}
/**
* Called when the scene needs to be rendered. Delegates to requestAnimationFrame
* for future renders
*/
function render() {
// update stats
stats.update();
// update the camera
cameraControl.update();
scene.getObjectByName('earth').rotation.y+=control.rotationSpeed;
scene.getObjectByName('clouds').rotation.y+=control.rotationSpeed*1.1;
// and render the scene
renderer.render(scene, camera);
// render using requestAnimationFrame
requestAnimationFrame(render);
}
/**
* Function handles the resize event. This make sure the camera and the renderer
* are updated at the correct moment.
*/
function handleResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
// calls the init function when the window is done loading.
window.onload = init;
// calls the handleResize function when the window is resized
window.addEventListener('resize', handleResize, false);
</script>
<body>
</body>
</html>