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179 lines
4.2 KiB
179 lines
4.2 KiB
3 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 - materials - cubemap mipmaps</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="container"></div>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - cubemap customized mipmaps demo.<br/>
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Left: webgl generated mipmaps<br/>
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Right: manual mipmaps<br/>
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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 { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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let container;
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let camera, scene, renderer;
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init();
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animate();
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//load customized cube texture
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async function loadCubeTextureWithMipmaps() {
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const path = 'textures/cube/angus/';
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const format = '.jpg';
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const mipmaps = [];
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const maxLevel = 8;
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async function loadCubeTexture( urls ) {
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return new Promise( function ( resolve ) {
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new THREE.CubeTextureLoader().load( urls, function ( cubeTexture ) {
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resolve( cubeTexture );
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} );
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} );
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}
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// load mipmaps
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const pendings = [];
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for ( let level = 0; level <= maxLevel; ++ level ) {
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const urls = [];
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for ( let face = 0; face < 6; ++ face ) {
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urls.push( path + 'cube_m0' + level + '_c0' + face + format );
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}
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const mipmapLevel = level;
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pendings.push( loadCubeTexture( urls ).then( function ( cubeTexture ) {
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mipmaps[ mipmapLevel ] = cubeTexture;
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} ) );
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}
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await Promise.all( pendings );
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const customizedCubeTexture = mipmaps.shift();
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customizedCubeTexture.mipmaps = mipmaps;
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customizedCubeTexture.minFilter = THREE.LinearMipMapLinearFilter;
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customizedCubeTexture.magFilter = THREE.LinearFilter;
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customizedCubeTexture.generateMipmaps = false;
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customizedCubeTexture.needsUpdate = true;
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return customizedCubeTexture;
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}
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function init() {
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container = document.createElement( 'div' );
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document.body.appendChild( container );
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camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 10000 );
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camera.position.z = 500;
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scene = new THREE.Scene();
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loadCubeTextureWithMipmaps().then( function ( cubeTexture ) {
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//model
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const sphere = new THREE.SphereGeometry( 100, 128, 128 );
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//manual mipmaps
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let material = new THREE.MeshBasicMaterial( { color: 0xffffff, envMap: cubeTexture } );
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material.name = 'manual mipmaps';
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let mesh = new THREE.Mesh( sphere, material );
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mesh.position.set( 100, 0, 0 );
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scene.add( mesh );
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//webgl mipmaps
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material = material.clone();
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material.name = 'auto mipmaps';
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const autoCubeTexture = cubeTexture.clone();
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autoCubeTexture.mipmaps = [];
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autoCubeTexture.generateMipmaps = true;
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autoCubeTexture.needsUpdate = true;
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material.envMap = autoCubeTexture;
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mesh = new THREE.Mesh( sphere, material );
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mesh.position.set( - 100, 0, 0 );
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scene.add( mesh );
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} );
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//renderer
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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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//controls
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const controls = new OrbitControls( camera, renderer.domElement );
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controls.minPolarAngle = Math.PI / 4;
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controls.maxPolarAngle = Math.PI / 1.5;
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window.addEventListener( 'resize', onWindowResize );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function animate() {
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requestAnimationFrame( animate );
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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