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296 lines
7.6 KiB
296 lines
7.6 KiB
2 years ago
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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 - compression</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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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - BufferGeometry Compression<br />
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Octahedron and Quantization encoding methods from Tarek Sherif
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</div>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import Stats from 'three/addons/libs/stats.module.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import * as GeometryCompressionUtils from 'three/addons/utils/GeometryCompressionUtils.js';
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import * as BufferGeometryUtils from 'three/addons/utils/BufferGeometryUtils.js';
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import { TeapotGeometry } from 'three/addons/geometries/TeapotGeometry.js';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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const statsEnabled = true;
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let container, stats, gui;
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let camera, scene, renderer, controls;
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const lights = [];
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// options
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const data = {
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'model': 'Icosahedron',
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'wireframe': false,
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'texture': false,
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'detail': 4,
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'rotationSpeed': 0.1,
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'QuantizePosEncoding': false,
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'NormEncodingMethods': 'None', // for normal encodings
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'DefaultUVEncoding': false,
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'totalGPUMemory': '0 bytes'
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};
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let memoryDisplay;
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// geometry params
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const radius = 100;
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// materials
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const lineMaterial = new THREE.LineBasicMaterial( { color: 0xaaaaaa, transparent: true, opacity: 0.8 } );
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const meshMaterial = new THREE.MeshPhongMaterial( { color: 0xffffff, emissive: 0x111111 } );
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// texture
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const texture = new THREE.TextureLoader().load( 'textures/uv_grid_opengl.jpg' );
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texture.wrapS = THREE.RepeatWrapping;
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texture.wrapT = THREE.RepeatWrapping;
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//
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init();
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animate();
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function init() {
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//
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container = document.createElement( 'div' );
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document.body.appendChild( container );
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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container.appendChild( renderer.domElement );
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//
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scene = new THREE.Scene();
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camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.01, 10000000 );
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camera.position.x = 2 * radius;
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camera.position.y = 2 * radius;
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camera.position.z = 2 * radius;
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controls = new OrbitControls( camera, renderer.domElement );
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//
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lights[ 0 ] = new THREE.PointLight( 0xffffff, 1, 0 );
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lights[ 1 ] = new THREE.PointLight( 0xffffff, 1, 0 );
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lights[ 2 ] = new THREE.PointLight( 0xffffff, 1, 0 );
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lights[ 0 ].position.set( 0, 2 * radius, 0 );
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lights[ 1 ].position.set( 2 * radius, - 2 * radius, 2 * radius );
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lights[ 2 ].position.set( - 2 * radius, - 2 * radius, - 2 * radius );
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scene.add( lights[ 0 ] );
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scene.add( lights[ 1 ] );
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scene.add( lights[ 2 ] );
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//
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scene.add( new THREE.AxesHelper( radius * 5 ) );
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//
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let geom = newGeometry( data );
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const mesh = new THREE.Mesh( geom, meshMaterial );
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const lineSegments = new THREE.LineSegments( new THREE.WireframeGeometry( geom ), lineMaterial );
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lineSegments.visible = data.wireframe;
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scene.add( mesh );
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scene.add( lineSegments );
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//
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gui = new GUI();
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gui.width = 350;
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function newGeometry( data ) {
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switch ( data.model ) {
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case 'Icosahedron':
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return new THREE.IcosahedronGeometry( radius, data.detail );
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case 'Cylinder':
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return new THREE.CylinderGeometry( radius, radius, radius * 2, data.detail * 6 );
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case 'Teapot':
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return new TeapotGeometry( radius, data.detail * 3, true, true, true, true, true );
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case 'TorusKnot':
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return new THREE.TorusKnotGeometry( radius, 10, data.detail * 20, data.detail * 6, 3, 4 );
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}
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}
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function generateGeometry() {
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geom = newGeometry( data );
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updateGroupGeometry(
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mesh,
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lineSegments,
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geom,
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data );
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}
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// updateLineSegments
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function updateLineSegments() {
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lineSegments.visible = data.wireframe;
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}
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let folder = gui.addFolder( 'Scene' );
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folder.add( data, 'model', [ 'Icosahedron', 'Cylinder', 'TorusKnot', 'Teapot' ] ).onChange( generateGeometry );
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folder.add( data, 'wireframe', false ).onChange( updateLineSegments );
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folder.add( data, 'texture', false ).onChange( generateGeometry );
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folder.add( data, 'detail', 1, 8, 1 ).onChange( generateGeometry );
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folder.add( data, 'rotationSpeed', 0, 0.5, 0.1 );
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folder.open();
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folder = gui.addFolder( 'Position Compression' );
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folder.add( data, 'QuantizePosEncoding', false ).onChange( generateGeometry );
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folder.open();
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folder = gui.addFolder( 'Normal Compression' );
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folder.add( data, 'NormEncodingMethods', [ 'None', 'DEFAULT', 'OCT1Byte', 'OCT2Byte', 'ANGLES' ] ).onChange( generateGeometry );
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folder.open();
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folder = gui.addFolder( 'UV Compression' );
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folder.add( data, 'DefaultUVEncoding', false ).onChange( generateGeometry );
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folder.open();
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folder = gui.addFolder( 'Memory Info' );
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folder.open();
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memoryDisplay = folder.add( data, 'totalGPUMemory', '0 bytes' );
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computeGPUMemory( mesh );
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//
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if ( statsEnabled ) {
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stats = new Stats();
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container.appendChild( stats.dom );
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}
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window.addEventListener( 'resize', onWindowResize );
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}
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//
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function onWindowResize() {
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renderer.setSize( window.innerWidth, window.innerHeight );
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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}
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//
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function updateLightsPossition() {
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lights.forEach( light => {
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const direction = light.position.clone();
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direction.applyAxisAngle( new THREE.Vector3( 1, 1, 0 ), data.rotationSpeed / 180 * Math.PI );
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light.position.add( direction.sub( light.position ) );
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} );
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}
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//
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function animate() {
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requestAnimationFrame( animate );
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controls.update();
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updateLightsPossition();
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renderer.render( scene, camera );
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if ( statsEnabled ) stats.update();
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}
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//
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function updateGroupGeometry( mesh, lineSegments, geometry, data ) {
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// dispose first
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lineSegments.geometry.dispose();
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mesh.geometry.dispose();
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lineSegments.geometry = new THREE.WireframeGeometry( geometry );
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mesh.geometry = geometry;
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mesh.material = new THREE.MeshPhongMaterial( { color: 0xffffff, emissive: 0x111111 } );
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mesh.material.map = data.texture ? texture : null;
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if ( data[ 'QuantizePosEncoding' ] ) {
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GeometryCompressionUtils.compressPositions( mesh );
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}
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if ( data[ 'NormEncodingMethods' ] !== 'None' ) {
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GeometryCompressionUtils.compressNormals( mesh, data[ 'NormEncodingMethods' ] );
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}
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if ( data[ 'DefaultUVEncoding' ] ) {
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GeometryCompressionUtils.compressUvs( mesh );
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}
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computeGPUMemory( mesh );
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}
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function computeGPUMemory( mesh ) {
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// Use BufferGeometryUtils to do memory calculation
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memoryDisplay.setValue( BufferGeometryUtils.estimateBytesUsed( mesh.geometry ) + ' bytes' );
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}
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</script>
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</body>
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</html>
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