javascript
/
three.js
mirror of https://github.com/tazdij/three.js.git


			
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							<!doctype html>
<html lang="en">
	<head>
		<title>three.js webgl - level-of-details</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:#000;
				color:#fff;
				padding:0;
				margin:0;
				font-weight: bold;
				overflow:hidden;
			}

			#info {
				position: absolute;
				top: 0px; width: 100%;
				color: #ffffff;
				padding: 5px;
				font-family: Monospace;
				font-size: 13px;
				text-align: center;
				z-index:100;
			}

			a { color:red }

		</style>
	</head>

	<body>
		<div id="info">
			<a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - level-of-details WebGL example
		</div>


		<script src="../build/Three.js"></script>

		<script src="js/Detector.js"></script>
		<script src="js/RequestAnimationFrame.js"></script>
		<script src="js/Stats.js"></script>

		<!-- load the font file from canvas-text -->

		<script src="fonts/helvetiker_regular.typeface.js"></script>

		<script>

			if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

			var container, stats;

			var camera, scene, renderer;

			var geometry, 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( 45, window.innerWidth / window.innerHeight, 1, 15000 );
				camera.position.z = 1000;

				scene = new THREE.Scene();
				scene.fog = new THREE.Fog( 0x000000, 1, 15000 );

				var light = new THREE.PointLight( 0xff2200 );
				light.position.set( 0, 0, 0 );
				scene.add( light );

				var light = new THREE.DirectionalLight( 0xffffff );
				light.position.set( 0, 0, 1 ).normalize();
				scene.add( light );

				var wireMaterial = new THREE.MeshLambertMaterial( { color: 0xffffff, opacity: 0.5, wireframe: true } );

				function getOptionsWithSegments( x, b, bevel ) {

					return {

						size: 80,
						height: 20,
						curveSegments: x,
						font: "helvetiker",
						bevelSegments: b,
						bevelEnabled: bevel,
						bevelThickness:8,
						bevelSize: 3,
						steps: 1,
						amount: 20,

					};

				};

				var theText = "&"; // Try $ :)

				// we could use TextPath and ExtrudeGeometry if we wish to optimize stuff futher
				var geometry = [

					[ new THREE.TextGeometry( theText, getOptionsWithSegments(8, 6, true)),
						300, [ new THREE.MeshPhongMaterial( { color: 0xffee00 } ), wireMaterial ] ],
					[ new THREE.TextGeometry( theText, getOptionsWithSegments(5,2, true)),
						800, [ new THREE.MeshLambertMaterial( { color: 0xffaa00 } ), wireMaterial ]],
					[ new THREE.TextGeometry( theText, getOptionsWithSegments(2,1, true)),
						1000, [ new THREE.MeshLambertMaterial( { color: 0x005500 } ), wireMaterial ] ],
					[ new THREE.TextGeometry( theText, getOptionsWithSegments(2,1,false)),
						2000, [ new THREE.MeshLambertMaterial( { color: 0x0055ff } ), wireMaterial ]],
					[ new THREE.TextGeometry( theText, getOptionsWithSegments(1,1, false)),
						10000, [ new THREE.MeshLambertMaterial( { color: 0xff1100 } ), wireMaterial ]]

				];

				var i, j, mesh, lod;

				for ( j = 0; j < 1000; j ++ ) {

					lod = new THREE.LOD();

					for ( i = 0; i < geometry.length; i++ ) {

						mesh = new THREE.Mesh( geometry[ i ][ 0 ], geometry[ i ][ 2 ] );
						mesh.scale.set( 1.5, 1.5, 1.5 );
						mesh.updateMatrix();
						mesh.matrixAutoUpdate = false;
						lod.addLevel( mesh, geometry[ i ][ 1 ] );

					}

					lod.position.x = 10000 * ( 0.5 - Math.random() );
					lod.position.y =  7500 * ( 0.5 - Math.random() );
					lod.position.z = 10000 * ( 0.5 - Math.random() );
					lod.updateMatrix();
					lod.matrixAutoUpdate = false;

					scene.add( lod );

				}


				renderer = new THREE.WebGLRenderer( { clearColor: 0x000000, clearAlpha: 1 } );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.sortObjects = false;

				container.appendChild( renderer.domElement );

			}

			function onDocumentMouseMove(event) {

				mouseX = ( event.clientX - windowHalfX ) * 10;
				mouseY = ( event.clientY - windowHalfY ) * 10;

			}

			function animate() {

				requestAnimationFrame( animate );
				render();

			}

			function render() {

				camera.position.x += ( mouseX - camera.position.x ) * .005;
				camera.position.y += ( - mouseY - camera.position.y ) * .01;

				camera.lookAt( scene.position );

				renderer.render( scene, camera );

			}

			function log( text ) {

				var e = document.getElementById("log");
				e.innerHTML = text + "<br/>" + e.innerHTML;

			}

		</script>

	</body>
</html>