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webgl_performance.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - 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 {
background:#fff;
padding:0;
margin:0;
font-weight: bold;
overflow:hidden;
}
</style>
</head>
<body>
<script src="../build/three.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
var container, stats;
var camera, scene, renderer;
var objects;
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.z = 3200;
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xffffff );
objects = [];
var material = new THREE.MeshNormalMaterial();
var loader = new THREE.BufferGeometryLoader();
loader.load( 'models/json/suzanne_buffergeometry.json', function ( geometry ) {
geometry.computeVertexNormals();
for ( var i = 0; i < 5000; i ++ ) {
var mesh = new THREE.Mesh( geometry, material );
mesh.position.x = Math.random() * 8000 - 4000;
mesh.position.y = Math.random() * 8000 - 4000;
mesh.position.z = Math.random() * 8000 - 4000;
mesh.rotation.x = Math.random() * 2 * Math.PI;
mesh.rotation.y = Math.random() * 2 * Math.PI;
mesh.scale.x = mesh.scale.y = mesh.scale.z = Math.random() * 50 + 100;
objects.push( mesh );
scene.add( mesh );
}
} );
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
stats = new Stats();
container.appendChild( stats.dom );
//
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function onDocumentMouseMove( event ) {
mouseX = ( event.clientX - windowHalfX ) * 10;
mouseY = ( event.clientY - windowHalfY ) * 10;
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
camera.position.x += ( mouseX - camera.position.x ) * .05;
camera.position.y += ( - mouseY - camera.position.y ) * .05;
camera.lookAt( scene.position );
for ( var i = 0, il = objects.length; i < il; i ++ ) {
objects[ i ].rotation.x += 0.01;
objects[ i ].rotation.y += 0.02;
}
renderer.render( scene, camera );
}
</script>
</body>
</html>