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canvas_performance.html
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canvas_performance.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js canvas - performance</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
font-family: Monospace;
background-color: #f0f0f0;
margin: 0px;
overflow: hidden;
}
</style>
</head>
<body>
<script src="../build/three.min.js"></script>
<script src="js/renderers/Projector.js"></script>
<script src="js/renderers/CanvasRenderer.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
var container, stats;
var camera, scene, renderer;
var light;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.set( 0, 1000, 1000 );
camera.lookAt( scene.position );
// Grid
var size = 500, step = 100;
var geometry = new THREE.Geometry();
for ( var i = - size; i <= size; i += step ) {
geometry.vertices.push( new THREE.Vector3( - size, 0, i ) );
geometry.vertices.push( new THREE.Vector3( size, 0, i ) );
geometry.vertices.push( new THREE.Vector3( i, 0, - size ) );
geometry.vertices.push( new THREE.Vector3( i, 0, size ) );
}
var material = new THREE.LineBasicMaterial( { color: 0x000000, opacity: 0.5 } );
var line = new THREE.Line( geometry, material );
line.type = THREE.LinePieces;
scene.add( line );
// Spheres
geometry = new THREE.SphereGeometry( 100, 26, 18 );
material = new THREE.MeshLambertMaterial( { color: 0xffffff, shading: THREE.FlatShading, overdraw: 0.5 } );
for ( var i = 0; i < 20; i ++ ) {
var sphere = new THREE.Mesh( geometry, material );
sphere.position.x = ( i % 5 ) * 200 - 400;
sphere.position.z = Math.floor( i / 5 ) * 200 - 400;
scene.add( sphere );
}
// Lights
var ambientLight = new THREE.AmbientLight( Math.random() * 0x202020 );
scene.add( ambientLight );
var directionalLight = new THREE.DirectionalLight( Math.random() * 0xffffff );
directionalLight.position.set( 0, 1, 0 );
scene.add( directionalLight );
light = new THREE.PointLight( 0xff0000, 1, 500 );
scene.add( light );
renderer = new THREE.CanvasRenderer();
renderer.setClearColor( 0xf0f0f0 );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
container.appendChild(stats.domElement);
//
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
var timer = Date.now() * 0.001;
light.position.x = Math.cos( timer ) * 1000;
light.position.y = 500;
light.position.z = Math.sin( timer ) * 1000;
renderer.render( scene, camera );
}
</script>
</body>
</html>