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webgl_performance_doublesided.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.min.js"></script>
<script src="js/Detector.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var container, stats;
var camera, scene, renderer;
var mesh, geometry;
var mouseX = 0, mouseY = 0;
var SCREEN_WIDTH = window.innerWidth,
SCREEN_HEIGHT = window.innerHeight;
var windowHalfX = SCREEN_WIDTH / 2;
var windowHalfY = SCREEN_HEIGHT / 2;
var FANCY = true;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 50, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 20000 );
camera.position.z = 3200;
scene = new THREE.Scene();
var light = new THREE.PointLight( 0x0011ff, 1, 5500 );
light.position.set( 4000, 0, 0 );
scene.add( light );
var light = new THREE.PointLight( 0xff1100, 1, 5500 );
light.position.set( -4000, 0, 0 );
scene.add( light );
if ( FANCY ) {
var light = new THREE.PointLight( 0xffaa00, 2, 3000 );
light.position.set( 0, 0, 0 );
scene.add( light );
var path = "textures/cube/SwedishRoyalCastle/";
var format = '.jpg';
var urls = [
path + 'px' + format, path + 'nx' + format,
path + 'py' + format, path + 'ny' + format,
path + 'pz' + format, path + 'nz' + format
];
var reflectionCube = THREE.ImageUtils.loadTextureCube( urls );
reflectionCube.format = THREE.RGBFormat;
var material = new THREE.MeshPhongMaterial( { specular: 0xffffff, shininess: 100, envMap: reflectionCube, combine: THREE.MixOperation, reflectivity: 0.1, perPixel: true, side: THREE.DoubleSide } );
material.wrapAround = true;
material.wrapRGB.set( 0.5, 0.5, 0.5 );
} else {
var material = new THREE.MeshPhongMaterial( { specular: 0xffffff, shading: THREE.SmoothShading, perPixel: true, doubleSided: true } );
}
var geometry = new THREE.SphereGeometry( 1, 32, 16, 0, Math.PI );
for ( var i = 0; i < 5000; i ++ ) {
var mesh = new THREE.Mesh( geometry, material );
mesh.position.x = Math.random() * 10000 - 5000;
mesh.position.y = Math.random() * 10000 - 5000;
mesh.position.z = Math.random() * 10000 - 5000;
mesh.rotation.x = Math.random() * 360 * ( Math.PI / 180 );
mesh.rotation.y = Math.random() * 360 * ( Math.PI / 180 );
mesh.scale.x = mesh.scale.y = mesh.scale.z = Math.random() * 50 + 100;
mesh.matrixAutoUpdate = false;
mesh.updateMatrix();
scene.add( mesh );
}
renderer = new THREE.WebGLRenderer( { clearColor: 0x050505, clearAlpha: 1, antialias: FANCY } );
renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );
renderer.gammaInput = true;
renderer.gammaOutput = true;
renderer.physicallyBasedShading = FANCY;
container.appendChild( renderer.domElement );
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
stats.domElement.style.zIndex = 100;
stats.domElement.children[ 0 ].children[ 0 ].style.color = "#eee";
stats.domElement.children[ 0 ].style.background = "transparent";
stats.domElement.children[ 0 ].children[ 1 ].style.display = "none";
container.appendChild( stats.domElement );
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
window.addEventListener( 'resize', onWindowResize, false );
}
//
function onWindowResize( event ) {
SCREEN_WIDTH = window.innerWidth;
SCREEN_HEIGHT = window.innerHeight;
renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );
camera.aspect = SCREEN_WIDTH / SCREEN_HEIGHT;
camera.updateProjectionMatrix();
windowHalfX = SCREEN_WIDTH / 2;
windowHalfY = SCREEN_HEIGHT / 2;
}
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 );
renderer.render( scene, camera );
}
</script>
</body>
</html>