samien
/
three.js
oglindă de https://github.com/mrdoob/three.js.git


			
				
					
						
						
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							<!DOCTYPE HTML>
<html lang="en">
	<head>
		<title>three.js - particles - billboards - webgl</title>
		<meta charset="utf-8">
		<style type="text/css">
			body {
				background-color: #000000;
				margin: 0px;
				overflow: hidden;
                font-family:Monospace;
                font-size:13px;
                text-align:center;
                font-weight: bold;
				text-align:center;
			}

			a {
				color:#0078ff;
			}
			
            #info {
				color:#fff;
                position: absolute;
                top: 0px; width: 100%;
                padding: 5px;
				z-index:100;
				
            }
			
			#oldie {
				font-family:monospace;
				font-size:13px;

				text-align:center;
				background:#eee;
				color:#000;
				padding:1em;

				width:475px;
				margin:5em auto 0;

				display:none;
			}
			
		</style>
	</head>
	<body>
	
        <div id="info">
			<a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - webgl particle billboards example
		</div>

		<center>
		<div id="oldie">
			Sorry, your browser doesn't support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation">WebGL</a>
			and <a href="http://www.whatwg.org/specs/web-workers/current-work/">Web Workers</a>.<br/>
			<br/>
			Please try in
			<a href="http://www.chromium.org/getting-involved/dev-channel">Chrome 9+</a> /
			<a href="http://www.mozilla.com/en-US/firefox/all-beta.html">Firefox 4+</a> /
			<a href="http://nightly.webkit.org/">Safari OSX 10.6+</a>
		</div>
		</center>

		<script type="text/javascript" src="../build/ThreeExtras.js"></script>
		<script type="text/javascript" src="js/Stats.js"></script>

		<script type="text/javascript">
		
			if ( !is_browser_compatible() ) {

				document.getElementById( "oldie" ).style.display = "block";

			}

			var container, stats;
			var camera, scene, renderer, particles, geometry, material, i, h, color, sprite, size, x, y, z;
			var mouseX = 0, mouseY = 0;

			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;

			init();
			setInterval( loop, 1000 / 60 );
			//loop();

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new THREE.Camera( 55, window.innerWidth / window.innerHeight, 1, 3000 );
				camera.position.z = 1000;

				scene = new THREE.Scene();
				scene.fog = new THREE.FogExp2( 0x000000, 0.001 );
				
				geometry = new THREE.Geometry();
				
				sprite = ImageUtils.loadTexture( "textures/sprites/circle.png" );
				
				for ( i = 0; i < 5000; i++ ) {

					x = 2000 * Math.random() - 1000;
					y = 2000 * Math.random() - 1000;
					z = 2000 * Math.random() - 1000;
					vector = new THREE.Vector3( x, y, z );
					geometry.vertices.push( new THREE.Vertex( vector ) );					
					
				}

				material = new THREE.ParticleBasicMaterial( { size: 35, map: sprite, blending: THREE.BillboardBlending } );
				material.color.setHSV( 1.0, 0.2, 0.8 );

				particles = new THREE.ParticleSystem( geometry, material );
				particles.sortParticles = true;
				particles.updateMatrix();
				scene.addObject( particles );
				
				var light = new THREE.DirectionalLight( 0xffffff );
				light.position.x = 0;
				light.position.y = 0;
				light.position.z = 1;
				scene.addLight( light );

				renderer = new THREE.WebGLRenderer( { clearAlpha: 1 });
				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 );

				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'touchstart', onDocumentTouchStart, false );
				document.addEventListener( 'touchmove', onDocumentTouchMove, false );
				
			}

			function onDocumentMouseMove( event ) {

				mouseX = event.clientX - windowHalfX;
				mouseY = event.clientY - windowHalfY;
				
			}

			function onDocumentTouchStart( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;
					
				}
			}

			function onDocumentTouchMove( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;
					
				}
				
			}

			function loop() {

				var time = new Date().getTime() * 0.00005;
				
				camera.position.x += ( mouseX - camera.position.x ) * 0.05;
				camera.position.y += ( - mouseY - camera.position.y ) * 0.05;

				/*
				for( i = 0; i < scene.objects.length; i++ ) {
				
					scene.objects[i].rotation.y = 5*time * ( i < 4 ? i+1 : - (i+1) );
					
				}
				*/

				h = ( 360 * ( 1.0 + time ) % 360 ) / 360;
				material.color.setHSV( h, 0.75, 0.8 );
					
				
				renderer.render( scene, camera );

				stats.update();
			}

			function is_browser_compatible() {

				// WebGL support

				try { var test = new Float32Array(1); } catch(e) { return false; }

				// Web workers

				return !!window.Worker;

			}

		</script>
	</body>
</html>