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208 lines
5.4 KiB
208 lines
5.4 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>threejs webgl - materials - equirectangular exr image based lighting</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"><a href="https://threejs.org" target="_blank" rel="noopener">threejs</a> - Example of an IBL (Image based lighting) pipeline based around<br> equirectangular EXR lightprobe data. Created by <a href="https://github.com/richardmonette" target="_blank" rel="noopener">Richard Monette</a></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 { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { EXRLoader } from 'three/addons/loaders/EXRLoader.js';
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const params = {
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envMap: 'EXR',
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roughness: 0.0,
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metalness: 0.0,
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exposure: 1.0,
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debug: false,
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};
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let container, stats;
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let camera, scene, renderer, controls;
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let torusMesh, planeMesh;
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let pngCubeRenderTarget, exrCubeRenderTarget;
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let pngBackground, exrBackground;
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init();
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animate();
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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( 40, window.innerWidth / window.innerHeight, 1, 1000 );
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camera.position.set( 0, 0, 120 );
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scene = new THREE.Scene();
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renderer = new THREE.WebGLRenderer();
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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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renderer.toneMapping = THREE.ACESFilmicToneMapping;
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renderer.outputEncoding = THREE.sRGBEncoding;
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//
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let geometry = new THREE.TorusKnotGeometry( 18, 8, 150, 20 );
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let material = new THREE.MeshStandardMaterial( {
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metalness: params.metalness,
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roughness: params.roughness,
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envMapIntensity: 1.0
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} );
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torusMesh = new THREE.Mesh( geometry, material );
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scene.add( torusMesh );
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geometry = new THREE.PlaneGeometry( 200, 200 );
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material = new THREE.MeshBasicMaterial();
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planeMesh = new THREE.Mesh( geometry, material );
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planeMesh.position.y = - 50;
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planeMesh.rotation.x = - Math.PI * 0.5;
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scene.add( planeMesh );
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THREE.DefaultLoadingManager.onLoad = function ( ) {
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pmremGenerator.dispose();
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};
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new EXRLoader().load( 'textures/piz_compressed.exr', function ( texture ) {
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texture.mapping = THREE.EquirectangularReflectionMapping;
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exrCubeRenderTarget = pmremGenerator.fromEquirectangular( texture );
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exrBackground = texture;
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} );
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new THREE.TextureLoader().load( 'textures/equirectangular.png', function ( texture ) {
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texture.mapping = THREE.EquirectangularReflectionMapping;
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texture.encoding = THREE.sRGBEncoding;
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pngCubeRenderTarget = pmremGenerator.fromEquirectangular( texture );
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pngBackground = texture;
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} );
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const pmremGenerator = new THREE.PMREMGenerator( renderer );
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pmremGenerator.compileEquirectangularShader();
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stats = new Stats();
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container.appendChild( stats.dom );
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controls = new OrbitControls( camera, renderer.domElement );
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controls.minDistance = 50;
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controls.maxDistance = 300;
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window.addEventListener( 'resize', onWindowResize );
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const gui = new GUI();
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gui.add( params, 'envMap', [ 'EXR', 'PNG' ] );
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gui.add( params, 'roughness', 0, 1, 0.01 );
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gui.add( params, 'metalness', 0, 1, 0.01 );
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gui.add( params, 'exposure', 0, 2, 0.01 );
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gui.add( params, 'debug', false );
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gui.open();
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}
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function onWindowResize() {
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const width = window.innerWidth;
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const height = window.innerHeight;
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camera.aspect = width / height;
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camera.updateProjectionMatrix();
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renderer.setSize( width, height );
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}
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function animate() {
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requestAnimationFrame( animate );
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stats.begin();
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render();
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stats.end();
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}
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function render() {
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torusMesh.material.roughness = params.roughness;
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torusMesh.material.metalness = params.metalness;
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let newEnvMap = torusMesh.material.envMap;
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let background = scene.background;
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switch ( params.envMap ) {
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case 'EXR':
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newEnvMap = exrCubeRenderTarget ? exrCubeRenderTarget.texture : null;
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background = exrBackground;
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break;
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case 'PNG':
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newEnvMap = pngCubeRenderTarget ? pngCubeRenderTarget.texture : null;
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background = pngBackground;
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break;
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}
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if ( newEnvMap !== torusMesh.material.envMap ) {
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torusMesh.material.envMap = newEnvMap;
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torusMesh.material.needsUpdate = true;
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planeMesh.material.map = newEnvMap;
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planeMesh.material.needsUpdate = true;
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}
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torusMesh.rotation.y += 0.005;
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planeMesh.visible = params.debug;
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scene.background = background;
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renderer.toneMappingExposure = params.exposure;
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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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