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<!DOCTYPE html>
<html lang="en">
<head>
<title>threejs webgl - materials - equirectangular exr image based lighting</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">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>
<!-- 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 Stats from 'three/addons/libs/stats.module.js';
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { EXRLoader } from 'three/addons/loaders/EXRLoader.js';
const params = {
envMap: 'EXR',
roughness: 0.0,
metalness: 0.0,
exposure: 1.0,
debug: false,
};
let container, stats;
let camera, scene, renderer, controls;
let torusMesh, planeMesh;
let pngCubeRenderTarget, exrCubeRenderTarget;
let pngBackground, exrBackground;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.set( 0, 0, 120 );
scene = new THREE.Scene();
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
renderer.toneMapping = THREE.ACESFilmicToneMapping;
renderer.outputEncoding = THREE.sRGBEncoding;
//
let geometry = new THREE.TorusKnotGeometry( 18, 8, 150, 20 );
let material = new THREE.MeshStandardMaterial( {
metalness: params.metalness,
roughness: params.roughness,
envMapIntensity: 1.0
} );
torusMesh = new THREE.Mesh( geometry, material );
scene.add( torusMesh );
geometry = new THREE.PlaneGeometry( 200, 200 );
material = new THREE.MeshBasicMaterial();
planeMesh = new THREE.Mesh( geometry, material );
planeMesh.position.y = - 50;
planeMesh.rotation.x = - Math.PI * 0.5;
scene.add( planeMesh );
THREE.DefaultLoadingManager.onLoad = function ( ) {
pmremGenerator.dispose();
};
new EXRLoader().load( 'textures/piz_compressed.exr', function ( texture ) {
texture.mapping = THREE.EquirectangularReflectionMapping;
exrCubeRenderTarget = pmremGenerator.fromEquirectangular( texture );
exrBackground = texture;
} );
new THREE.TextureLoader().load( 'textures/equirectangular.png', function ( texture ) {
texture.mapping = THREE.EquirectangularReflectionMapping;
texture.encoding = THREE.sRGBEncoding;
pngCubeRenderTarget = pmremGenerator.fromEquirectangular( texture );
pngBackground = texture;
} );
const pmremGenerator = new THREE.PMREMGenerator( renderer );
pmremGenerator.compileEquirectangularShader();
stats = new Stats();
container.appendChild( stats.dom );
controls = new OrbitControls( camera, renderer.domElement );
controls.minDistance = 50;
controls.maxDistance = 300;
window.addEventListener( 'resize', onWindowResize );
const gui = new GUI();
gui.add( params, 'envMap', [ 'EXR', 'PNG' ] );
gui.add( params, 'roughness', 0, 1, 0.01 );
gui.add( params, 'metalness', 0, 1, 0.01 );
gui.add( params, 'exposure', 0, 2, 0.01 );
gui.add( params, 'debug', false );
gui.open();
}
function onWindowResize() {
const width = window.innerWidth;
const height = window.innerHeight;
camera.aspect = width / height;
camera.updateProjectionMatrix();
renderer.setSize( width, height );
}
function animate() {
requestAnimationFrame( animate );
stats.begin();
render();
stats.end();
}
function render() {
torusMesh.material.roughness = params.roughness;
torusMesh.material.metalness = params.metalness;
let newEnvMap = torusMesh.material.envMap;
let background = scene.background;
switch ( params.envMap ) {
case 'EXR':
newEnvMap = exrCubeRenderTarget ? exrCubeRenderTarget.texture : null;
background = exrBackground;
break;
case 'PNG':
newEnvMap = pngCubeRenderTarget ? pngCubeRenderTarget.texture : null;
background = pngBackground;
break;
}
if ( newEnvMap !== torusMesh.material.envMap ) {
torusMesh.material.envMap = newEnvMap;
torusMesh.material.needsUpdate = true;
planeMesh.material.map = newEnvMap;
planeMesh.material.needsUpdate = true;
}
torusMesh.rotation.y += 0.005;
planeMesh.visible = params.debug;
scene.background = background;
renderer.toneMappingExposure = params.exposure;
renderer.render( scene, camera );
}
</script>
</body>
</html>