Add glTF compression example

coffeemat.glb is exported from the source Sketchfab scene using gltfpack with geometry compression via EXT_meshopt_compression and texture compression via KHR_texture_basisu (using ETC1S/BasisLZ). The source scene has 12 MB of geometry and 22 MB of texture data. The compressed scene has 2 MB of geometry and 2.6 MB of texture data.

Add glTF compression example
coffeemat.glb is exported from the source Sketchfab scene using gltfpack with geometry compression via EXT_meshopt_compression and texture compression via KHR_texture_basisu (using ETC1S/BasisLZ). The source scene has 12 MB of geometry and 22 MB of texture data. The compressed scene has 2 MB of geometry and 2.6 MB of texture data.
b9715ce0 · Arseny Kapoulkine · 31425813 · b9715ce0 · b9715ce0 · b9715ce0
4 changed file
--- a/examples/files.json
+++ b/examples/files.json
@@ -91,6 +91,7 @@
 		"webgl_loader_fbx_nurbs",
 		"webgl_loader_gcode",
 		"webgl_loader_gltf",
+		"webgl_loader_gltf_compressed",
 		"webgl_loader_gltf_extensions",
 		"webgl_loader_gltf_variants",
 		"webgl_loader_imagebitmap",

--- a/examples/models/gltf/coffeemat.glb
+++ b/examples/models/gltf/coffeemat.glb
--- a/examples/screenshots/webgl_loader_gltf_compressed.jpg
+++ b/examples/screenshots/webgl_loader_gltf_compressed.jpg
--- a/examples/webgl_loader_gltf_compressed.html
+++ b/examples/webgl_loader_gltf_compressed.html
+<!DOCTYPE html>
+<html lang="en">
+	<head>
+		<title>three.js webgl - glTF 2.0 - compressed</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 + compression extensions<br />
+			<a href="https://sketchfab.com/3d-models/coffeemat-7fb196a40a6e4697aad9ca2f75c8b33d" target="_blank" rel="noopener">Coffeemat</a> by
+			<a href="https://sketchfab.com/OFFcours1" target="_blank" rel="noopener">Roman Red</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 src="./js/libs/basis/msc_basis_transcoder.js"></script>
+
+		<script type="module">
+
+			import * as THREE from '../build/three.module.js';
+
+			import { OrbitControls } from './jsm/controls/OrbitControls.js';
+			import { GLTFLoader } from './jsm/loaders/GLTFLoader.js';
+			import { RGBELoader } from './jsm/loaders/RGBELoader.js';
+
+			import { KTX2Loader } from './jsm/loaders/KTX2Loader.js';
+			import { MeshoptDecoder } from './jsm/libs/meshopt_decoder.module.js';
+
+			let camera, scene, renderer;
+
+			init();
+			render();
+
+			function init() {
+
+				const container = document.createElement( 'div' );
+				document.body.appendChild( container );
+
+				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 );
+
+				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
+				camera.position.set( 0, 90, 0 );
+
+				scene = new THREE.Scene();
+
+				const ktx2Loader = new KTX2Loader().detectSupport( renderer );
+
+				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
+
+						const loader = new GLTFLoader().setPath( 'models/gltf/' );
+						loader.setKTX2Loader( ktx2Loader );
+						loader.setMeshoptDecoder( MeshoptDecoder );
+
+						// coffeemat.glb was produced from the source scene using gltfpack:
+						// gltfpack -i coffeemat/scene.gltf -o coffeemat.glb -cc -tc
+						// The resulting model uses EXT_meshopt_compression (for geometry) and KHR_texture_basisu (for texture compression using ETC1S/BasisLZ)
+
+						loader.load( 'coffeemat.glb', function ( gltf ) {
+
+							scene.add( gltf.scene );
+
+							render();
+
+						} );
+
+					} );
+
+				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 = 500;
+				controls.maxDistance = 1000;
+				controls.target.set( 10, 76, -16 );
+				controls.update();
+
+				window.addEventListener( 'resize', onWindowResize, false );
+
+			}
+
+			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>