samien
/
three.js
Mirror von https://github.com/mrdoob/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgpu - postprocessing anamorphic</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<meta property="og:title" content="three.js webgpu - postprocessing anamorphic">
		<meta property="og:type" content="website">
		<meta property="og:url" content="https://threejs.org/examples/webgpu_postprocessing_anamorphic.html">
		<meta property="og:image" content="https://threejs.org/examples/screenshots/webgpu_postprocessing_anamorphic.jpg">
		<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>Anamorphic Lensflares</span>
			</div>

			<small>
				Anamorphic bloom filter using custom high pass filter.
			</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, screenUV, uniform, uv, vec2, vec3, color, Fn, vec4, Loop, float, mix, luminance, smoothstep, rtt, time, viewportSize, instanceIndex, positionLocal } from 'three/tsl';
			import { bloom } from 'three/addons/tsl/display/BloomNode.js';

			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';

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

			let camera, scene, renderer, instancedMesh, controls;
			let renderPipeline;
			
			const _dummy = new THREE.Object3D();

			init();

			async function init() {

				const container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 0.25, 250 );
				camera.position.set( 0, 0, 20 );

				scene = new THREE.Scene();
				scene.backgroundNode = Fn( () => {

					const dist = screenUV.distance( 0.5 ).mul( 2.0 );
					return mix( color( 0x111111 ), color( 0x000000 ), dist );

				} )();

				const timeScale = uniform( 0.5 );

				const material = new THREE.MeshBasicNodeMaterial( {
					color: 0xffffff,
					// Animate the spheres up and down continuously using TSL and their instanceIndex as a phase offset
					positionNode: positionLocal.add( vec3( 0, time.add( float( instanceIndex ).mul( 0.5 ) ).mul( timeScale ).sin().mul( 5.0 ), 0 ) )
				} );

				const maxCount = 200;

				instancedMesh = new THREE.InstancedMesh( new THREE.SphereGeometry( 0.1, 32, 32 ), material, maxCount );

				const _color = new THREE.Color();

				for ( let i = 0; i < maxCount; i ++ ) {

					_dummy.position.x = ( Math.random() - 0.5 ) * 20;
					_dummy.position.y = ( Math.random() - 0.5 ) * 20;
					_dummy.position.z = ( Math.random() - 0.5 ) * 20;
					_dummy.updateMatrix();
					instancedMesh.setMatrixAt( i, _dummy.matrix );

					_color.setHex( Math.random() * 0xffffff );
					instancedMesh.setColorAt( i, _color );

				}

				scene.add( instancedMesh );

				renderer = new THREE.WebGPURenderer( { antialias: true } );

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

				renderer.toneMapping = THREE.NeutralToneMapping;
				renderer.toneMappingExposure = 1;
				renderer.inspector = new Inspector();
				renderer.setAnimationLoop( render );
				container.appendChild( renderer.domElement );

				controls = new OrbitControls( camera, renderer.domElement );
				controls.minDistance = 2;
				controls.maxDistance = 25;

				// post-processing

				const scenePass = pass( scene, camera );

				const intensity = uniform( 5.0 );
				const tintColor = uniform( new THREE.Color( 0x7a8aff ) );
				const threshold = uniform( 0.3 );
				const radius = uniform( 0.0 );
				const samples = uniform( 80 );

				const bloomPass = bloom( scenePass.getTextureNode().toInspector( 'Color' ), intensity, radius, threshold );
				bloomPass.setResolutionScale( 0.25 );

				// Custom high pass for anamorphic bloom
				bloomPass.highPassFn = Fn( ( { input, threshold, smoothWidth } ) => {

					// Extract bright areas to a texture (computed once, sampled many times)
					const v = luminance( input.rgb );
					const alpha = smoothstep( threshold, threshold.add( smoothWidth ), v );
					const brightPass = rtt( mix( vec4( 0 ), input, alpha ), null, null, {
						wrapS: THREE.MirroredRepeatWrapping,
						wrapT: THREE.MirroredRepeatWrapping
					} );

					// Horizontal blur
					const total = vec4( 0 );
					const halfSamples = samples.div( 2 );

					const invSize = vec2( 1.0 ).div( viewportSize );

					Loop( { start: halfSamples.negate(), end: halfSamples }, ( { i } ) => {

						let softness = float( i ).abs().div( halfSamples ).oneMinus();
						softness = softness.pow( 2.0 );

						const shiftedUV = vec2( uv().x.add( invSize.x.mul( i ).mul( 4.0 ) ), uv().y );
						total.addAssign( brightPass.sample( shiftedUV ).mul( softness ) );

					} );

					return total.div( samples.div( 3.0 ) );

				} );

				const anamorphicPass = bloomPass.mul( tintColor ).toInspector( 'Anamorphic' );

				renderPipeline = new THREE.RenderPipeline( renderer );
				renderPipeline.outputNode = scenePass.add( anamorphicPass );

				// gui

				const gui = renderer.inspector.createParameters( 'Settings' );
				gui.add( intensity, 'value', 0, 10 ).name( 'intensity' );
				gui.add( threshold, 'value', 0, .9 ).name( 'threshold' );
				gui.add( samples, 'value', 2, 128, 1 ).name( 'samples' );
				gui.addColor( tintColor, 'value' ).name( 'tint color' );
				gui.add( radius, 'value', 0, 1, 0.01 ).name( 'bloom radius' );
				gui.add( timeScale, 'value', 0, 1 ).name( 'time scale' );

				//

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

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

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

			}

			//

			function render() {

				controls.update();

				renderPipeline.render();

			}

		</script>

	</body>
</html>