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


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - glTF loader</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="info">
			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - GLTFLoader + <a href="https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_variants" target="_blank" rel="noopener">KHR_materials_variants</a> extension<br />
			<a href="https://github.com/pushmatrix/glTF-Sample-Models/tree/master/2.0/MaterialsVariantsShoe" target="_blank" rel="noopener">Materials Variants Shoe</a> by
			<a href="https://github.com/Shopify" target="_blank" rel="noopener">Shopify, Inc</a><br />
			<a href="https://hdrihaven.com/hdri/?h=royal_esplanade" target="_blank" rel="noopener">Royal Esplanade</a> by <a href="https://hdrihaven.com/" target="_blank" rel="noopener">HDRI Haven</a>
		</div>

		<script type="module">

			import * as THREE from '../build/three.module.js';

			import { GUI } from './jsm/libs/dat.gui.module.js';
			import { OrbitControls } from './jsm/controls/OrbitControls.js';
			import { GLTFLoader } from './jsm/loaders/GLTFLoader.js';
			import { RGBELoader } from './jsm/loaders/RGBELoader.js';
			import { RoughnessMipmapper } from './jsm/utils/RoughnessMipmapper.js';

			let camera, scene, renderer;
			let gui;
			
			const state = {
				variant: "midnight"
			};

			init();
			render();

			function init() {

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

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 0.25, 20 );
				camera.position.set( 3.0, 3.0, - 3.0);

				scene = new THREE.Scene();

				new RGBELoader()
					.setDataType( THREE.UnsignedByteType )
					.setPath( 'textures/equirectangular/' )
					.load( 'royal_esplanade_1k.hdr', function ( texture ) {

						const envMap = pmremGenerator.fromEquirectangular( texture ).texture;

						scene.background = envMap;
						scene.environment = envMap;

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

						render();

						// model

						// use of RoughnessMipmapper is optional
						const roughnessMipmapper = new RoughnessMipmapper( renderer );

						const loader = new GLTFLoader().setPath( 'models/gltf/MaterialsVariantsShoe/glTF/' );
						loader.load( 'MaterialsVariantsShoe.gltf', function ( gltf ) {

							gltf.scene.scale.set( 10.0, 10.0, 10.0 );

							gltf.scene.traverse( function ( child ) {

								if ( child.isMesh ) {

									// TOFIX RoughnessMipmapper seems to be broken with WebGL 2.0
									// roughnessMipmapper.generateMipmaps( child.material );

								}

							} );

							scene.add( gltf.scene );

							// GUI
							gui = new GUI();

							// Details of the KHR_materials_variants extension used here can be found below
							// https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_variants
							
							if ( gltf.userData.gltfExtensions !== undefined ) {

								let parser = gltf.parser;

								const extension = gltf.userData.gltfExtensions[ 'KHR_materials_variants' ];

								if ( extension !== undefined ) {

									let variants = extension.variants.map( variant => variant.name );
									let guiVariants = gui.add( state, 'variant', variants ).name( 'Variant' );
									
									changeMaterialByVariantName(scene, parser, extension, state.variant);

									guiVariants.onChange( function ( value ) {

										changeMaterialByVariantName(scene, parser, extension, value);

									});

								}

							}

							roughnessMipmapper.dispose();

							render();

						} );

					} );

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.toneMapping = THREE.ACESFilmicToneMapping;
				renderer.toneMappingExposure = 1;
				renderer.outputEncoding = THREE.sRGBEncoding;
				container.appendChild( renderer.domElement );

				const pmremGenerator = new THREE.PMREMGenerator( renderer );
				pmremGenerator.compileEquirectangularShader();

				const controls = new OrbitControls( camera, renderer.domElement );
				controls.addEventListener( 'change', render ); // use if there is no animation loop
				controls.minDistance = 2;
				controls.maxDistance = 10;
				controls.target.set( 0, 0, - 0.2 );
				controls.update();

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

			}

			function changeMaterialByVariantName( scene, parser, extension, variantName ) {

				const variantIndex = extension.variants.findIndex( ( v ) => v.name.includes( variantName ) );

				scene.traverse( async ( object ) => {

					if ( !object.isMesh ) return;

					const meshVariantData = object.userData.gltfExtensions[ 'KHR_materials_variants' ];

					if ( meshVariantData !== undefined ) {

						let materialIndex = - 1;

						for ( let i = 0; i < meshVariantData.mappings.length; i ++ ) {

							const mapping = meshVariantData.mappings[ i ];

							if ( mapping.variants.indexOf( variantIndex ) != - 1 ) {

								materialIndex = mapping.material;

								break;

							}

						}

						if ( materialIndex != - 1 ) {

							object.material = await parser.getDependency( 'material', materialIndex );

							render();

						}

					}

				});

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

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

				render();

			}

			//

			function render() {

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>