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webgl_sprites.html
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<!DOCTYPE HTML>
<html lang="en">
<head>
<title>three.js webgl - sprites</title>
<meta charset="utf-8">
<style type="text/css">
body {
background:#fff;
padding:0;
margin:0;
font-weight: bold;
overflow:hidden;
}
</style>
</head>
<body>
<script type="text/javascript" src="../build/Three.js"></script>
<script type="text/javascript" src="js/RequestAnimationFrame.js"></script>
<script type="text/javascript" src="js/Stats.js"></script>
<script type="text/javascript">
var container, stats;
var camera, scene, renderer;
var group;
var time = 0;
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.Camera( 60, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.z = 1500;
scene = new THREE.Scene();
// create sprites
var amount = 200;
var radius = 500;
var mapA = THREE.ImageUtils.loadTexture( "textures/sprite0.png" );
var mapB = THREE.ImageUtils.loadTexture( "textures/sprite1.png" );
group = new THREE.Object3D();
for( var a = 0; a < amount; a++ ) {
var sprite = new THREE.Sprite( { map: mapA, useScreenCoordinates: false } );
sprite.position.set( Math.random() - 0.5,
Math.random() - 0.5,
Math.random() - 0.5 );
if( sprite.position.z < 0 ) {
sprite.map = mapB;
}
sprite.position.normalize();
sprite.position.multiplyScalar( radius );
group.addChild( sprite );
}
scene.addChild( group );
// add 2d-sprites
sprite = new THREE.Sprite( { map: mapA, alignment:THREE.SpriteAlignment.topLeft } );
sprite.position.set( 100, 100, 0 );
sprite.opacity = 0.25;
scene.addChild( sprite );
sprite = new THREE.Sprite( { map: mapA, alignment:THREE.SpriteAlignment.topLeft } );
sprite.position.set( 150, 150, 2 );
sprite.opacity = 0.5;
scene.addChild( sprite );
sprite = new THREE.Sprite( { map: mapA, alignment:THREE.SpriteAlignment.topLeft } );
sprite.position.set( 200, 200, 3 );
sprite.opacity = 1;
scene.addChild( sprite );
// renderer
renderer = new THREE.WebGLRenderer();
renderer.setClearColorHex( 0x000000, 1 );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.sortObjects = true;
container.appendChild( renderer.domElement );
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
stats.domElement.style.zIndex = 100;
container.appendChild( stats.domElement );
}
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
for ( var c = 0; c < group.children.length; c++ ) {
var sprite = group.children[ c ];
var scale = Math.sin( time + sprite.position.x * 0.01 ) * 0.3 + 1.0;
sprite.rotation += 0.1 * ( c / group.children.length );
sprite.scale.set( scale, scale, 1.0 );
sprite.opacity = Math.sin( time + sprite.position.x * 0.01 ) * 0.4 + 0.6;
}
group.rotation.x = time * 0.5;
group.rotation.y = time * 0.75;
group.rotation.z = time * 1.0;
time += 0.02;
renderer.render( scene, camera );
}
function log( text ) {
var e = document.getElementById("log");
e.innerHTML = text + "<br/>" + e.innerHTML;
}
</script>
</body>
</html>