samien
/
three.js
mirror of https://github.com/mrdoob/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - loaders - EXR with HTJ2K compression</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> -
			EXR loader with HTJ2K compression support
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';
			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import { EXRLoader } from 'three/addons/loaders/EXRLoader.js';
			import { RoomEnvironment } from 'three/addons/environments/RoomEnvironment.js';

			let camera, scene, renderer;

			init();

			async 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( - 1.8, 0.6, 2.7 );

				scene = new THREE.Scene();

				// Add loading information
				const loadingDiv = document.createElement( 'div' );
				loadingDiv.style.position = 'absolute';
				loadingDiv.style.top = '50%';
				loadingDiv.style.left = '50%';
				loadingDiv.style.transform = 'translate(-50%, -50%)';
				loadingDiv.style.color = 'white';
				loadingDiv.style.fontSize = '20px';
				loadingDiv.innerHTML = 'Loading...';
				document.body.appendChild( loadingDiv );

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

				const pmremGenerator = new THREE.PMREMGenerator( renderer );
				scene.environment = pmremGenerator.fromScene( new RoomEnvironment( renderer ), 0.04 ).texture;

				const controls = new OrbitControls( camera, renderer.domElement );
				controls.addEventListener( 'change', render );
				controls.minDistance = 2;
				controls.maxDistance = 10;
				controls.target.set( 0, 0, - 0.2 );
				controls.update();

				try {

					// Load HTJ2K-compressed EXR file
					// HTJ2K support is automatically initialized when needed
					loadingDiv.innerHTML = 'Loading HTJ2K-compressed EXR...';
					const loader = new EXRLoader();

					loader.load( 'textures/memorial_htj2k.exr', function ( texture ) {

						loadingDiv.remove();

						texture.mapping = THREE.EquirectangularReflectionMapping;

						const geometry = new THREE.SphereGeometry( 0.8, 64, 32 );

						const material = new THREE.MeshStandardMaterial( {
							metalness: 0,
							roughness: 0,
							envMap: texture,
							envMapIntensity: 1
						} );

						const mesh = new THREE.Mesh( geometry, material );
						scene.add( mesh );

						render();

					}, undefined, function ( error ) {

						loadingDiv.innerHTML = 'Error loading EXR: ' + error.message;
						console.error( error );

					} );

				} catch ( error ) {

					loadingDiv.innerHTML = 'Error: ' + error.message;
					console.error( error );

					// Fall back to loading a regular EXR without HTJ2K
					loadingDiv.innerHTML += '<br>Loading standard EXR instead...';

					const loader = new EXRLoader();
					loader.load( 'textures/memorial.exr', function ( texture ) {

						const infoDiv = document.createElement( 'div' );
						infoDiv.style.position = 'absolute';
						infoDiv.style.bottom = '20px';
						infoDiv.style.left = '20px';
						infoDiv.style.color = 'yellow';
						infoDiv.innerHTML = 'Using fallback: Standard PIZ-compressed EXR';
						document.body.appendChild( infoDiv );

						loadingDiv.remove();

						texture.mapping = THREE.EquirectangularReflectionMapping;

						const geometry = new THREE.SphereGeometry( 0.8, 64, 32 );

						const material = new THREE.MeshStandardMaterial( {
							metalness: 0,
							roughness: 0,
							envMap: texture,
							envMapIntensity: 1
						} );

						const mesh = new THREE.Mesh( geometry, material );
						scene.add( mesh );

						render();

					} );

				}

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

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

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

				render();

			}

			function render() {

				renderer.render( scene, camera );

			}

			function animate() {

				render();

			}

		</script>

	</body>
</html>