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-<!DOCTYPE html>
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-<html lang="en">
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- <head>
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- <title>three.js webgl - buffergeometry - uint</title>
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- <meta charset="utf-8">
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- <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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- <style>
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- body {
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- color: #cccccc;
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- font-family:Monospace;
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- font-size:13px;
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- text-align:center;
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-
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- background-color: #050505;
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- margin: 0px;
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- overflow: hidden;
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- }
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-
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- #info {
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- position: absolute;
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- top: 0px; width: 100%;
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- padding: 5px;
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- }
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-
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- a {
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- color: #0080ff;
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- }
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-
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- </style>
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- </head>
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- <body>
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-
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- <div id="container"></div>
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- <div id="info"><a href="http://threejs.org" target="_blank">three.js</a> webgl - buffergeometry - BufferAttributeTypes</div>
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-
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- <script src="../build/three.min.js"></script>
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-
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- <script src="js/Detector.js"></script>
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- <script src="js/libs/stats.min.js"></script>
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-
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- <script>
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-
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- if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
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-
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- var container, stats;
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-
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- var camera, scene, renderer;
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-
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- var mesh;
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-
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- init();
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- animate();
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-
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- function init() {
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-
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- container = document.getElementById( 'container' );
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-
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- //
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-
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- camera = new THREE.PerspectiveCamera( 27, window.innerWidth / window.innerHeight, 1, 3500 );
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- camera.position.z = 2750;
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-
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- scene = new THREE.Scene();
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- scene.fog = new THREE.Fog( 0x050505, 2000, 3500 );
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-
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- //
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-
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- scene.add( new THREE.AmbientLight( 0x444444 ) );
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-
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- var light1 = new THREE.DirectionalLight( 0xffffff, 0.5 );
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- light1.position.set( 1, 1, 1 );
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- scene.add( light1 );
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-
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- var light2 = new THREE.DirectionalLight( 0xffffff, 1.5 );
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- light2.position.set( 0, -1, 0 );
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- scene.add( light2 );
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-
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- //
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-
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- var triangles = 500000;
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-
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- var geometry = new THREE.BufferGeometry();
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-
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- var indices = new Uint32Array( triangles * 3 );
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-
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- for ( var i = 0; i < indices.length; i ++ ) {
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-
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- indices[ i ] = i;
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-
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- }
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-
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- var positions = new Float32Array( triangles * 3 * 3 );
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- var normals = new Int16Array( triangles * 3 * 3 );
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- var colors = new Uint8Array( triangles * 3 * 3 );
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-
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- var color = new THREE.Color();
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-
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- var n = 800, n2 = n/2; // triangles spread in the cube
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- var d = 12, d2 = d/2; // individual triangle size
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-
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- var pA = new THREE.Vector3();
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- var pB = new THREE.Vector3();
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- var pC = new THREE.Vector3();
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-
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- var cb = new THREE.Vector3();
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- var ab = new THREE.Vector3();
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-
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- for ( var i = 0; i < positions.length; i += 9 ) {
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-
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- // positions
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-
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- var x = Math.random() * n - n2;
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- var y = Math.random() * n - n2;
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- var z = Math.random() * n - n2;
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-
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- var ax = x + Math.random() * d - d2;
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- var ay = y + Math.random() * d - d2;
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- var az = z + Math.random() * d - d2;
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-
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- var bx = x + Math.random() * d - d2;
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- var by = y + Math.random() * d - d2;
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- var bz = z + Math.random() * d - d2;
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-
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- var cx = x + Math.random() * d - d2;
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- var cy = y + Math.random() * d - d2;
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- var cz = z + Math.random() * d - d2;
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-
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- positions[ i ] = ax;
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- positions[ i + 1 ] = ay;
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- positions[ i + 2 ] = az;
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-
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- positions[ i + 3 ] = bx;
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- positions[ i + 4 ] = by;
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- positions[ i + 5 ] = bz;
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-
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- positions[ i + 6 ] = cx;
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- positions[ i + 7 ] = cy;
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- positions[ i + 8 ] = cz;
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-
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- // flat face normals
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-
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- pA.set( ax, ay, az );
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- pB.set( bx, by, bz );
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- pC.set( cx, cy, cz );
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-
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- cb.subVectors( pC, pB );
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- ab.subVectors( pA, pB );
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- cb.cross( ab );
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-
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- cb.normalize();
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-
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- var nx = cb.x;
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- var ny = cb.y;
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- var nz = cb.z;
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-
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- normals[ i ] = nx * 32767;
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- normals[ i + 1 ] = ny * 32767;
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- normals[ i + 2 ] = nz * 32767;
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-
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- normals[ i + 3 ] = nx * 32767;
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- normals[ i + 4 ] = ny * 32767;
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- normals[ i + 5 ] = nz * 32767;
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-
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- normals[ i + 6 ] = nx * 32767;
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- normals[ i + 7 ] = ny * 32767;
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- normals[ i + 8 ] = nz * 32767;
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-
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- // colors
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-
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- var vx = ( x / n ) + 0.5;
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- var vy = ( y / n ) + 0.5;
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- var vz = ( z / n ) + 0.5;
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-
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- color.setRGB( vx, vy, vz );
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-
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- colors[ i ] = color.r * 255;
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- colors[ i + 1 ] = color.g * 255;
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- colors[ i + 2 ] = color.b * 255;
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-
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- colors[ i + 3 ] = color.r * 255;
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- colors[ i + 4 ] = color.g * 255;
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- colors[ i + 5 ] = color.b * 255;
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-
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- colors[ i + 6 ] = color.r * 255;
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- colors[ i + 7 ] = color.g * 255;
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- colors[ i + 8 ] = color.b * 255;
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-
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- }
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-
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- geometry.setIndex( new THREE.BufferAttribute( indices, 1 ) );
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- geometry.addAttribute( 'position', new THREE.BufferAttribute( positions, 3 ) );
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- geometry.addAttribute( 'normal', new THREE.BufferAttribute( normals, 3, true ) );
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- geometry.addAttribute( 'color', new THREE.BufferAttribute( colors, 3, true ) );
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-
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- geometry.computeBoundingSphere();
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-
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- var material = new THREE.MeshPhongMaterial( {
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- color: 0xaaaaaa, specular: 0xffffff, shininess: 250,
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- side: THREE.DoubleSide, vertexColors: THREE.VertexColors
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- } );
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-
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- mesh = new THREE.Mesh( geometry, material );
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- scene.add( mesh );
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-
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- //
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-
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- renderer = new THREE.WebGLRenderer( { antialias: false } );
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- renderer.setClearColor( scene.fog.color );
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- renderer.setPixelRatio( window.devicePixelRatio );
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- renderer.setSize( window.innerWidth, window.innerHeight );
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-
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- renderer.gammaInput = true;
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- renderer.gammaOutput = true;
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-
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- container.appendChild( renderer.domElement );
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-
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- //
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-
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- stats = new Stats();
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- stats.domElement.style.position = 'absolute';
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- stats.domElement.style.top = '0px';
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- container.appendChild( stats.domElement );
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-
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- //
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-
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- window.addEventListener( 'resize', onWindowResize, false );
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-
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- }
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-
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- function onWindowResize() {
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-
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- camera.aspect = window.innerWidth / window.innerHeight;
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- camera.updateProjectionMatrix();
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-
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- renderer.setSize( window.innerWidth, window.innerHeight );
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-
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- }
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-
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- //
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-
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- function animate() {
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-
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- requestAnimationFrame( animate );
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-
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- render();
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- stats.update();
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-
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- }
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-
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- function render() {
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-
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- var time = Date.now() * 0.001;
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-
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- mesh.rotation.x = time * 0.25;
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- mesh.rotation.y = time * 0.5;
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-
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- renderer.render( scene, camera );
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-
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- }
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-
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- </script>
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-
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- </body>
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-</html>
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Mr.doob