You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
179 lines
4.2 KiB
179 lines
4.2 KiB
2 years ago
|
<!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>
|
||
|
|
|
||
|
|
<!-- Import maps polyfill -->
|
||
|
|
<!-- Remove this when import maps will be widely supported -->
|
||
|
|
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
|
||
|
|
|
||
|
|
<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();
|
||
|
|
animate();
|
||
|
|
|
||
|
|
//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.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 );
|
||
|
|
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() {
|
||
|
|
|
||
|
|
requestAnimationFrame( animate );
|
||
|
|
renderer.render( scene, camera );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
</script>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|