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