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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - level of detail</title>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
- <link type="text/css" rel="stylesheet" href="main.css">
- </head>
- <body>
- <div id="info">
- <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - level of detail
- </div>
- <script type="module">
- import * as THREE from '../build/three.module.js';
- import { FlyControls } from './jsm/controls/FlyControls.js';
- var container;
- var camera, scene, renderer;
- 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;
- 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 geometry = [
- [ new THREE.IcosahedronBufferGeometry( 100, 4 ), 50 ],
- [ new THREE.IcosahedronBufferGeometry( 100, 3 ), 300 ],
- [ new THREE.IcosahedronBufferGeometry( 100, 2 ), 1000 ],
- [ new THREE.IcosahedronBufferGeometry( 100, 1 ), 2000 ],
- [ new THREE.IcosahedronBufferGeometry( 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( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- container.appendChild( renderer.domElement );
- //
- controls = new FlyControls( camera, renderer.domElement );
- controls.movementSpeed = 1000;
- controls.rollSpeed = Math.PI / 10;
- //
- 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() );
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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