javascript
/
three.js
mirror of https://github.com/tazdij/three.js.git


			
				
					
						
						
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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="http://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>

		<script type="module">
			import {
				FloatType,
				HalfFloatType,
				LinearEncoding,
				LinearToneMapping,
				Mesh,
				MeshBasicMaterial,
				MeshStandardMaterial,
				NearestFilter,
				PerspectiveCamera,
				PlaneBufferGeometry,
				Scene,
				sRGBEncoding,
				TextureLoader,
				TorusKnotBufferGeometry,
				WebGLRenderer
			} from "../build/three.module.js";

			import Stats from './jsm/libs/stats.module.js';

			import { GUI } from './jsm/libs/dat.gui.module.js';
			import { OrbitControls } from './jsm/controls/OrbitControls.js';
			import { EXRLoader } from './jsm/loaders/EXRLoader.js';
			import { EquirectangularToCubeGenerator } from './jsm/loaders/EquirectangularToCubeGenerator.js';
			import { PMREMGenerator } from './jsm/pmrem/PMREMGenerator.js';
			import { PMREMCubeUVPacker } from './jsm/pmrem/PMREMCubeUVPacker.js';

			var params = {
				envMap: 'EXR',
				roughness: 0.0,
				metalness: 0.0,
				exposure: 1.0,
				debug: false,
			};

			var container, stats;
			var camera, scene, renderer, controls;
			var torusMesh, planeMesh;
			var pngCubeRenderTarget, exrCubeRenderTarget;
			var pngBackground, exrBackground;

			init();
			animate();

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.set( 0, 0, 120 );

				scene = new Scene();

				renderer = new WebGLRenderer();
				renderer.toneMapping = LinearToneMapping;

				//

				var geometry = new TorusKnotBufferGeometry( 18, 8, 150, 20 );
				var material = new MeshStandardMaterial( {
					metalness: params.roughness,
					roughness: params.metalness,
					envMapIntensity: 1.0
				} );

				torusMesh = new Mesh( geometry, material );
				scene.add( torusMesh );

				var geometry = new PlaneBufferGeometry( 200, 200 );
				var material = new MeshBasicMaterial();

				planeMesh = new Mesh( geometry, material );
				planeMesh.position.y = - 50;
				planeMesh.rotation.x = - Math.PI * 0.5;
				scene.add( planeMesh );

				new EXRLoader()
					.setType( FloatType )
					.load( 'textures/piz_compressed.exr', function ( texture ) {

						texture.minFilter = NearestFilter;
						// texture.magFilter = NearestFilter;
						texture.encoding = LinearEncoding;

						var cubemapGenerator = new EquirectangularToCubeGenerator( texture, { resolution: 512, type: HalfFloatType } );
						exrBackground = cubemapGenerator.renderTarget;
						var cubeMapTexture = cubemapGenerator.update( renderer );

						var pmremGenerator = new PMREMGenerator( cubeMapTexture );
						pmremGenerator.update( renderer );

						var pmremCubeUVPacker = new PMREMCubeUVPacker( pmremGenerator.cubeLods );
						pmremCubeUVPacker.update( renderer );

						exrCubeRenderTarget = pmremCubeUVPacker.CubeUVRenderTarget;

						texture.dispose();
						pmremGenerator.dispose();
						pmremCubeUVPacker.dispose();

					} );

				new TextureLoader().load( 'textures/equirectangular.png', function ( texture ) {

					texture.encoding = sRGBEncoding;

					var cubemapGenerator = new EquirectangularToCubeGenerator( texture, { resolution: 512 } );
					pngBackground = cubemapGenerator.renderTarget;

					var cubeMapTexture = cubemapGenerator.update( renderer );

					var pmremGenerator = new PMREMGenerator( cubeMapTexture );
					pmremGenerator.update( renderer );

					var pmremCubeUVPacker = new PMREMCubeUVPacker( pmremGenerator.cubeLods );
					pmremCubeUVPacker.update( renderer );

					pngCubeRenderTarget = pmremCubeUVPacker.CubeUVRenderTarget;

					texture.dispose();
					pmremGenerator.dispose();
					pmremCubeUVPacker.dispose();

				} );

				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );

				container.appendChild( renderer.domElement );

				renderer.gammaInput = false;
				renderer.gammaOutput = true;

				stats = new Stats();
				container.appendChild( stats.dom );

				controls = new OrbitControls( camera, renderer.domElement );
				controls.minDistance = 50;
				controls.maxDistance = 300;

				window.addEventListener( 'resize', onWindowResize, false );

				var 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() {

				var width = window.innerWidth;
				var 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;

				var newEnvMap = torusMesh.material.envMap;
				var 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>