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three.js
-ын хуулбар https://github.com/mrdoob/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgpu - materials - retroreflective</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 - materials - retroreflective">
		<meta property="og:type" content="website">
		<meta property="og:url" content="https://threejs.org/examples/webgpu_materials_retroreflective.html">
		<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>Retroreflective Materials</span>
			</div>

			<small>
				Traffic cones with retroreflective bands and a camera-mounted light demonstrating the <a href="https://jcgt.org/published/0015/01/04/" target="_blank" rel="noopener">Minimal Retroreflective Microfacet Model</a>. By <a href="https://ben3d.ca" target="_blank" rel="noopener">Ben Houston</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 { color, mix, mx_noise_float, pass, positionLocal, positionWorld, materialColor, materialRoughness, reflector, transformNormalToView, vec2, vec3 } from 'three/tsl';
			import { bloom } from 'three/addons/tsl/display/BloomNode.js';
			import { hashBlur } from 'three/addons/tsl/display/hashBlur.js';

			import { Inspector } from 'three/addons/inspector/Inspector.js';
			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import WebGPU from 'three/addons/capabilities/WebGPU.js';

			let camera, scene, renderer, renderPipeline, controls;
			let frontLight, reflectedFlashLight, bandMaterial;

			const params = {
				enabled: true,
				amount: 1.0,
				flashLight: 5.0
			};

			init();

			async function init() {

				if ( WebGPU.isAvailable() === false ) {

					document.body.appendChild( WebGPU.getErrorMessage() );

					throw new Error( 'No WebGPU support' );

				}

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

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 0.1, 100 );
				camera.position.set( 2.3, 1.32, 3.25 );

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0x0f131a );
				scene.fog = new THREE.Fog( 0x0f131a, 4, 18 );
				scene.add( camera );

				// camera-mounted LED flashlight (~6500K = sRGB white)
				frontLight = new THREE.PointLight( 0xffffff, params.flashLight, 12 );
				camera.add( frontLight );

				// the flashlight's mirror image below the ground: it stands in for the
				// puddle-bounced beam, so the retro bands also light up in the reflection
				reflectedFlashLight = new THREE.PointLight( 0xffffff, params.flashLight * 0.35, 12 );
				scene.add( reflectedFlashLight );

				createFloor();
				createCones();

				renderer = new THREE.WebGPURenderer( { antialias: true } );
				renderer.toneMapping = THREE.ACESFilmicToneMapping;
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( render );
				renderer.inspector = new Inspector();
				container.appendChild( renderer.domElement );

				await renderer.init();

				const pmremGenerator = new THREE.PMREMGenerator( renderer );
				scene.environment = pmremGenerator.fromScene( createNightEnvironment(), 0.02 ).texture;

				renderPipeline = new THREE.RenderPipeline( renderer );

				const scenePass = pass( scene, camera );
				const scenePassColor = scenePass.getTextureNode();

				renderPipeline.outputNode = scenePassColor.add( bloom( scenePassColor, 0.15, 0, 0 ) );

				controls = new OrbitControls( camera, renderer.domElement );
				controls.target.set( 0, 0.33, 0 );
				controls.maxPolarAngle = Math.PI / 2 - 0.05; // keep the camera above the ground
				controls.enableDamping = true;
				controls.update();

				const gui = renderer.inspector.createParameters( 'Settings' );
				gui.add( params, 'enabled' ).onChange( updateMaterial );
				gui.add( params, 'amount', 0, 1, 0.01 ).onChange( updateMaterial );
				gui.add( params, 'flashLight', 0, 30, 0.1 ).name( 'flash light' ).onChange( ( value ) => frontLight.intensity = value );

				window.addEventListener( 'resize', onWindowResize );

				updateMaterial();

			}

			function createNightEnvironment() {

				const environment = new THREE.Scene();

				// sky: faint city glow at the horizon fading to a dark zenith
				const skyMaterial = new THREE.MeshBasicNodeMaterial( { side: THREE.BackSide } );
				skyMaterial.colorNode = mix( color( 0x05070c ), color( 0x2a3148 ), positionLocal.normalize().y.abs().oneMinus().pow( 4 ) );
				environment.add( new THREE.Mesh( new THREE.SphereGeometry( 10 ), skyMaterial ) );

				// distant buildings with sparse lit windows
				const buildingMaterial = new THREE.MeshBasicNodeMaterial();

				const cell = vec2( positionWorld.x.add( positionWorld.z.mul( 1.7 ) ).mul( 3 ), positionWorld.y.mul( 2.5 ) );
				const cellUV = cell.fract();
				const window_ = cellUV.x.smoothstep( 0.15, 0.3 ).mul( cellUV.x.smoothstep( 0.7, 0.85 ).oneMinus() ).mul( cellUV.y.smoothstep( 0.2, 0.35 ) ).mul( cellUV.y.smoothstep( 0.65, 0.8 ).oneMinus() );
				const lit = mx_noise_float( cell.floor().mul( 0.731 ).add( 0.37 ) ).smoothstep( 0.0, 0.1 );
				const windowColor = mix( color( 0x88a8ff ), color( 0xffc16b ), mx_noise_float( cell.floor().mul( 0.317 ) ).add( 1 ).mul( 0.5 ) );
				buildingMaterial.colorNode = mix( color( 0x05060a ), windowColor.mul( 12 ), window_.mul( lit ) );

				for ( let i = 0; i < 8; i ++ ) {

					const angle = ( i / 8 ) * Math.PI * 2 + 0.35;
					const height = 2.5 + ( ( i * 2.7 ) % 3.5 );
					const building = new THREE.Mesh( new THREE.BoxGeometry( 2, height, 1 ), buildingMaterial );
					building.position.set( Math.cos( angle ) * 9, height / 2 - 0.5, Math.sin( angle ) * 9 );
					building.lookAt( 0, height / 2 - 0.5, 0 );
					environment.add( building );

				}

				// street lamps: sodium and LED
				const warmLampMaterial = new THREE.MeshBasicMaterial();
				warmLampMaterial.color.setRGB( 18, 11, 4 );

				const coolLampMaterial = new THREE.MeshBasicMaterial();
				coolLampMaterial.color.setRGB( 7, 9, 13 );

				for ( let i = 0; i < 6; i ++ ) {

					const angle = ( i / 6 ) * Math.PI * 2 + 0.7;
					const lamp = new THREE.Mesh( new THREE.SphereGeometry( 0.35 ), i % 3 === 2 ? coolLampMaterial : warmLampMaterial );
					lamp.position.set( Math.cos( angle ) * 8, 2.5 + ( i % 3 ), Math.sin( angle ) * 8 );
					environment.add( lamp );

				}

				// moon
				const moonMaterial = new THREE.MeshBasicMaterial();
				moonMaterial.color.setRGB( 2.5, 3, 4 );
				const moon = new THREE.Mesh( new THREE.SphereGeometry( 0.6 ), moonMaterial );
				moon.position.set( 4, 7, - 5 );
				environment.add( moon );

				return environment;

			}

			function createFloor() {

				const material = new THREE.MeshStandardNodeMaterial( {
					color: 0x1b1e23,
					roughness: 0.6
				} );

				const reflection = reflector( { resolutionScale: 0.5 } );
				reflection.target.rotateX( - Math.PI / 2 );
				scene.add( reflection.target );

				const position = positionWorld.xz;

				// fade procedural detail as its period approaches the pixel footprint,
				// which grows anisotropically at grazing angles and with distance
				const bandlimit = ( p ) => p.fwidth().length().smoothstep( 0.5, 1.5 ).oneMinus();

				// asphalt: tonal grain and broad worn patches
				const grain = mx_noise_float( position.mul( 60 ) ).mul( bandlimit( position.mul( 60 ) ) ).mul( 0.2 );
				const patches = mx_noise_float( position.mul( 1.5 ) ).mul( 0.08 );
				const asphalt = materialColor.mul( grain.add( patches ).add( 1 ) );

				// puddles: flat, dark and mirror-like
				const puddle = mx_noise_float( position.mul( 0.45 ).add( 6.27 ) ).smoothstep( 0.25, 0.45 );

				// bump: heightfield normal from finite differences of a fine noise, flattened in puddles
				const bumpNoise = ( p ) => mx_noise_float( p.mul( 180 ) );
				const e = 0.002;
				const strength = puddle.oneMinus().mul( bandlimit( position.mul( 180 ) ) ).mul( 0.0015 );
				const h = bumpNoise( position );
				const hx = bumpNoise( position.add( vec2( e, 0 ) ) );
				const hz = bumpNoise( position.add( vec2( 0, e ) ) );
				const bump = vec3( h.sub( hx ).mul( strength ), hz.sub( h ).mul( strength ), e ).normalize();

				material.normalNode = transformNormalToView( bump );

				// the surface relief wobbles the reflection; puddles stay calm
				reflection.uvNode = reflection.uvNode.add( bump.xy.mul( 0.03 ) );

				material.colorNode = mix( asphalt, asphalt.mul( 0.3 ), puddle );
				material.roughnessNode = mix( mx_noise_float( position.mul( 50 ) ).mul( bandlimit( position.mul( 50 ) ) ).mul( 0.15 ).add( materialRoughness ), 0.05, puddle );

				// rain-soaked: the whole surface reflects, streaky on wet asphalt and sharpest in the puddles
				const wetness = mix( 0.15, 0.7, puddle );
				const reflectionBlur = mix( 0.08, 0.005, puddle );
				material.emissiveNode = hashBlur( reflection, reflectionBlur, { repeats: 32 } ).rgb.mul( wetness );

				const floor = new THREE.Mesh( new THREE.PlaneGeometry( 40, 40 ), material );
				floor.rotation.x = - Math.PI / 2;
				scene.add( floor );

			}

			function createCones() {

				const orangeMaterial = new THREE.MeshPhysicalNodeMaterial( {
					color: 0xff6a00,
					roughness: 0.45
				} );

				// worn plastic: uncorrelated noise on roughness and tone
				orangeMaterial.roughnessNode = mx_noise_float( positionLocal.mul( 30 ) ).mul( 0.2 ).add( materialRoughness );
				orangeMaterial.colorNode = materialColor.mul( mx_noise_float( positionLocal.add( 7.3 ).mul( 20 ) ).mul( 0.1 ).add( 1 ) );

				bandMaterial = new THREE.MeshPhysicalNodeMaterial( {
					color: 0xf7f0d6,
					roughness: 0.22,
					retroreflective: params.amount
				} );

				const count = 5;
				const radius = 1.1;

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

					const cone = createCone( orangeMaterial, bandMaterial );
					const angle = ( i / count ) * Math.PI * 2;
					cone.position.set( Math.cos( angle ) * radius, 0, Math.sin( angle ) * radius );
					scene.add( cone );

				}

			}

			function createCone( orangeMaterial, bandMaterial ) {

				const cone = new THREE.Group();

				const base = new THREE.Mesh(
					createBaseGeometry( 0.42, 0.04, 0.08 ),
					orangeMaterial
				);
				cone.add( base );

				const bodyHeight = 0.71;
				const bodyBottom = 0.04;
				const bodyRadiusBottom = 0.17;
				const bodyRadiusTop = 0.035;

				const body = new THREE.Mesh(
					new THREE.CylinderGeometry( bodyRadiusTop, bodyRadiusBottom, bodyHeight, 96, 1, false ),
					orangeMaterial
				);
				body.position.y = bodyBottom + bodyHeight * 0.5;
				cone.add( body );

				const bands = [
					{ center: bodyBottom + bodyHeight * 0.6, height: 0.10 },
					{ center: bodyBottom + bodyHeight * 0.4, height: 0.06 }
				];

				for ( const { center, height } of bands ) {

					const bandRadiusBottom = radiusAtHeight( center - height * 0.5, bodyBottom, bodyHeight, bodyRadiusBottom, bodyRadiusTop ) * 1.01;
					const bandRadiusTop = radiusAtHeight( center + height * 0.5, bodyBottom, bodyHeight, bodyRadiusBottom, bodyRadiusTop ) * 1.01;

					const band = new THREE.Mesh(
						new THREE.CylinderGeometry( bandRadiusTop, bandRadiusBottom, height, 96, 1, true ),
						bandMaterial
					);
					band.position.y = center;
					cone.add( band );

				}

				return cone;

			}

			function radiusAtHeight( y, bodyBottom, bodyHeight, radiusBottom, radiusTop ) {

				const t = THREE.MathUtils.clamp( ( y - bodyBottom ) / bodyHeight, 0, 1 );
				return THREE.MathUtils.lerp( radiusBottom, radiusTop, t );

			}

			function createBaseGeometry( size, thickness, radius ) {

				const half = size / 2;

				const shape = new THREE.Shape();
				shape.moveTo( - half + radius, - half );
				shape.lineTo( half - radius, - half );
				shape.absarc( half - radius, - half + radius, radius, - Math.PI / 2, 0 );
				shape.lineTo( half, half - radius );
				shape.absarc( half - radius, half - radius, radius, 0, Math.PI / 2 );
				shape.lineTo( - half + radius, half );
				shape.absarc( - half + radius, half - radius, radius, Math.PI / 2, Math.PI );
				shape.lineTo( - half, - half + radius );
				shape.absarc( - half + radius, - half + radius, radius, Math.PI, Math.PI * 1.5 );

				const geometry = new THREE.ExtrudeGeometry( shape, { depth: thickness, bevelEnabled: false } );
				geometry.rotateX( - Math.PI / 2 );

				return geometry;

			}

			function updateMaterial() {

				bandMaterial.retroreflective = params.enabled ? params.amount : 0;

			}

			function onWindowResize() {

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

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

			}

			function render() {

				controls.update();

				reflectedFlashLight.position.set( camera.position.x, - camera.position.y, camera.position.z );
				reflectedFlashLight.intensity = frontLight.intensity * 0.35;

				renderPipeline.render();

			}

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