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 webgpu - ambient occlusion</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="example.css">
	</head>
	<body>

		<div id="info">
			<a href="https://threejs.org/" target="_blank" rel="noopener" class="logo-link"></a>

			<div class="title-wrapper">
				<a href="https://threejs.org/" target="_blank" rel="noopener">three.js</a><span>AO</span>
			</div>

			<small>
				Ambient Occlusion based on GTAO.<br />
				<a href="https://skfb.ly/oCnNx" target="_blank" rel="noopener">Minimalistic Modern Bedroom</a> by 
				<a href="https://sketchfab.com/dylanheyes" target="_blank" rel="noopener">dylanheyes</a> is licensed under <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank" rel="noopener">Creative Commons Attribution</a>.	
			</small>
		</div>

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

		<script type="module">

			import * as THREE from 'three/webgpu';
			import { pass, mrt, output, normalView, velocity, vec3, vec4 } from 'three/tsl';
			import { ao } from 'three/addons/tsl/display/GTAONode.js';
			import { traa } from 'three/addons/tsl/display/TRAANode.js';

			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import { DRACOLoader } from 'three/addons/loaders/DRACOLoader.js';
			import { RoomEnvironment } from 'three/addons/environments/RoomEnvironment.js';
			import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';

			import { Inspector } from 'three/addons/inspector/Inspector.js';

			let camera, scene, renderer, postProcessing, controls;

			let aoPass, traaPass, blendPassAO, scenePassColor;

			const params = {
				samples: 16,
				distanceExponent: 1,
				distanceFallOff: 1,
				radius: 0.25,
				scale: 1,
				thickness: 1,
				aoOnly: false
			};

			init();

			async function init() {

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 0.1, 50 );
				camera.position.set( 1, 1.3, 5 );

				scene = new THREE.Scene();

				renderer = new THREE.WebGPURenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				renderer.inspector = new Inspector();
				document.body.appendChild( renderer.domElement );

				await renderer.init();

				const environment = new RoomEnvironment();
				const pmremGenerator = new THREE.PMREMGenerator( renderer );

				scene.background = new THREE.Color( 0x666666 );
				scene.environment = pmremGenerator.fromScene( environment ).texture;
				environment.dispose();
				pmremGenerator.dispose();

				//

				controls = new OrbitControls( camera, renderer.domElement );
				controls.target.set( 0, 0.5, - 1 );
				controls.update();
				controls.enablePan = false;
				controls.enableDamping = true;
				controls.minDistance = 2;
				controls.maxDistance = 8;

				//

				postProcessing = new THREE.PostProcessing( renderer );

				const scenePass = pass( scene, camera );
				scenePass.setMRT( mrt( {
					output: output,
					normal: normalView,
					velocity: velocity
				} ) );

				scenePassColor = scenePass.getTextureNode( 'output' ).toInspector( 'Color' );
				const scenePassDepth = scenePass.getTextureNode( 'depth' ).toInspector( 'Depth', () => {

					return scenePass.getLinearDepthNode();

				} );
				const scenePassNormal = scenePass.getTextureNode( 'normal' ).toInspector( 'Normal' );
				const scenePassVelocity = scenePass.getTextureNode( 'velocity' ).toInspector( 'Velocity' );

				// ao

				aoPass = ao( scenePassDepth, scenePassNormal, camera ).toInspector( 'AO' );
				aoPass.resolutionScale = 0.5; // running AO in half resolution is often sufficient
				aoPass.useTemporalFiltering = true;
				blendPassAO = vec4( scenePassColor.rgb.mul( aoPass.r ), scenePassColor.a ); // the AO is stored only in the red channel

				// traa

				traaPass = traa( blendPassAO, scenePassDepth, scenePassVelocity, camera );
				postProcessing.outputNode = traaPass;

				//

				const dracoLoader = new DRACOLoader();
				dracoLoader.setDecoderPath( 'jsm/libs/draco/' );
				dracoLoader.setDecoderConfig( { type: 'js' } );
				const loader = new GLTFLoader();
				loader.setDRACOLoader( dracoLoader );
				loader.setPath( 'models/gltf/' );

				const gltf = await loader.loadAsync( 'minimalistic_modern_bedroom.glb' );

				const model = gltf.scene;
				model.position.set( 0, 1, 0 );
				scene.add( model );

				model.traverse( ( o ) => {

					// Transparent objects (e.g. loaded via GLTFLoader) might have "depthWrite" set to "false".
					// This is wanted when rendering the beauty pass however it produces wrong results when computing
					// AO since depth and normal data are out of sync. Computing normals from depth by not using MRT
					// can mitigate the issue although the depth information (and thus the normals) are not correct in
					// first place. Besides, normal estimation is computationally more expensive than just sampling a
					// normal texture. So depending on your scene, consider to enable "depthWrite" for all transparent objects.

					if ( o.material ) o.material.depthWrite = true;

				} );

				window.addEventListener( 'resize', onWindowResize );

				//

				const gui = renderer.inspector.createParameters( 'Settings' );
				gui.add( params, 'samples', 4, 32, 1 ).onChange( updateParameters );
				gui.add( params, 'distanceExponent', 1, 2 ).onChange( updateParameters );
				gui.add( params, 'distanceFallOff', 0.01, 1 ).onChange( updateParameters );
				gui.add( params, 'radius', 0.1, 1 ).onChange( updateParameters );
				gui.add( params, 'scale', 0.01, 2 ).onChange( updateParameters );
				gui.add( params, 'thickness', 0.01, 2 ).onChange( updateParameters );
				gui.add( aoPass, 'useTemporalFiltering' ).name( 'temporal filtering' );
				gui.add( params, 'aoOnly' ).onChange( ( value ) => {

					if ( value === true ) {

						postProcessing.outputNode = vec4( vec3( aoPass.r ), 1 );

					} else {


						postProcessing.outputNode = traaPass;

					}

					postProcessing.needsUpdate = true;

				} );

			}

			function updateParameters() {

				aoPass.samples.value = params.samples;
				aoPass.distanceExponent.value = params.distanceExponent;
				aoPass.distanceFallOff.value = params.distanceFallOff;
				aoPass.radius.value = params.radius;
				aoPass.scale.value = params.scale;
				aoPass.thickness.value = params.thickness;

			}

			function onWindowResize() {

				const width = window.innerWidth;
				const height = window.innerHeight;

				camera.aspect = width / height;
				camera.updateProjectionMatrix();

				renderer.setSize( width, height );

			}

			function animate() {

				controls.update();

				postProcessing.render();

			}

		</script>
	</body>
</html>