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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - GLTFloader + variants</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><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=quarry_01" target="_blank" rel="noopener">Quarry</a> from <a href="https://hdrihaven.com/" target="_blank" rel="noopener">HDRI Haven</a>
- </div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
- import { RGBELoader } from 'three/addons/loaders/RGBELoader.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( 2.5, 1.5, 3.0 );
- scene = new THREE.Scene();
- new RGBELoader()
- .setPath( 'textures/equirectangular/' )
- .load( 'quarry_01_1k.hdr', function ( texture ) {
- texture.mapping = THREE.EquirectangularReflectionMapping;
- scene.background = texture;
- scene.environment = texture;
- render();
- // model
- 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 );
- 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
- const parser = gltf.parser;
- const variantsExtension = gltf.userData.gltfExtensions[ 'KHR_materials_variants' ];
- const variants = variantsExtension.variants.map( ( variant ) => variant.name );
- const variantsCtrl = gui.add( state, 'variant', variants ).name( 'Variant' );
- selectVariant( scene, parser, variantsExtension, state.variant );
- variantsCtrl.onChange( ( value ) => selectVariant( scene, parser, variantsExtension, value ) );
- render();
- } );
- } );
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.toneMapping = THREE.ACESFilmicToneMapping;
- renderer.toneMappingExposure = 1;
- container.appendChild( renderer.domElement );
- 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, 0.5, - 0.2 );
- controls.update();
- window.addEventListener( 'resize', onWindowResize );
- }
- function selectVariant( scene, parser, extension, variantName ) {
- const variantIndex = extension.variants.findIndex( ( v ) => v.name.includes( variantName ) );
- scene.traverse( async ( object ) => {
- if ( ! object.isMesh || ! object.userData.gltfExtensions ) return;
- const meshVariantDef = object.userData.gltfExtensions[ 'KHR_materials_variants' ];
- if ( ! meshVariantDef ) return;
- if ( ! object.userData.originalMaterial ) {
- object.userData.originalMaterial = object.material;
- }
- const mapping = meshVariantDef.mappings
- .find( ( mapping ) => mapping.variants.includes( variantIndex ) );
- if ( mapping ) {
- object.material = await parser.getDependency( 'material', mapping.material );
- parser.assignFinalMaterial( object );
- } else {
- object.material = object.userData.originalMaterial;
- }
- 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>
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