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webgl_loader_gltf_variants.html
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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>