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<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://threejs.org" target="_blank">three.js</a> - level-of-details WebGL example
</div> <script src="../build/three.js"></script> <script src="js/controls/FlyControls.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 geometry, objects; var controls, clock = new THREE.Clock(); 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; controls = new THREE.FlyControls( camera );
controls.movementSpeed = 1000;
controls.rollSpeed = Math.PI / 10; scene = new THREE.Scene();
scene.fog = new THREE.Fog( 0x000000, 1, 15000 );
scene.autoUpdate = false; 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 geometry = [ [ new THREE.IcosahedronGeometry( 100, 4 ), 50 ],
[ new THREE.IcosahedronGeometry( 100, 3 ), 300 ],
[ new THREE.IcosahedronGeometry( 100, 2 ), 1000 ],
[ new THREE.IcosahedronGeometry( 100, 1 ), 2000 ],
[ new THREE.IcosahedronGeometry( 100, 0 ), 8000 ] ]; var material = new THREE.MeshLambertMaterial( { color: 0xffffff, wireframe: true } ); 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 ], material );
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();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.sortObjects = false;
container.appendChild( renderer.domElement ); // window.addEventListener( 'resize', onWindowResize, false ); } function onWindowResize() { camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix(); renderer.setSize( window.innerWidth, window.innerHeight ); } function animate() { requestAnimationFrame( animate );
render(); } function render() { controls.update( clock.getDelta() ); scene.updateMatrixWorld();
scene.traverse( function ( object ) { if ( object instanceof THREE.LOD ) { object.update( camera ); } } ); renderer.render( scene, camera ); } </script> </body>
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