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22-particle-system.html
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<html>
<head>
<title>Particle System</title>
<style>
body {
font-family: Monospace;
background-color: #000000;
margin: 0px;
overflow: hidden;
}
canvas {
width: 100%;
height: 100%;
}
</style>
<script src="lib/three.min.js"></script>
<script src="lib/stats.min.js"></script>
</head>
<body>
<script>
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );
camera.position.z = 300;
var renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setClearColor( 0x000000 );
document.body.appendChild( renderer.domElement );
var clock = new THREE.Clock(true);
var particles = new THREE.Geometry;
var particleSystem;
makeParticles();
function makeParticles()
{
for (var p = 0; p < 20000; p++) {
var particle = new THREE.Vector3(Math.random() * 500 - 250, Math.random() * 500 - 250, Math.random() * 500 - 250);
particles.vertices.push(particle);
}
var particleMaterial = new THREE.PointsMaterial( { color: 0xffffff });
particleSystem = new THREE.Points(particles, particleMaterial);
scene.add(particleSystem);
}
function updateParticles(delta)
{
particleSystem.rotation.y += delta;
}
function render() {
requestAnimationFrame(render);
delta = clock.getDelta();
updateParticles(delta);
renderer.render(scene, camera);
}
render();
</script>
</body>
</html>