samien
/
three.js
зеркало из 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 cone with a retroreflective band and a front-facing 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 { GUI } from 'three/addons/libs/lil-gui.module.min.js';
			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import WebGPU from 'three/addons/capabilities/WebGPU.js';

			let camera, scene, renderer;
			let frontLight, bandMaterial;

			const params = {
				retroreflectivity: true,
				retroreflective: 1.0,
				frontLightIntensity: 5.0
			};

			init();

			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( 4, 2.5, 6 );

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0x11151d );
				scene.add( camera );

				scene.add( new THREE.HemisphereLight( 0xffffff, 0x223344, 0.8 ) );

			
				frontLight = new THREE.PointLight( 0xffffff, params.frontLightIntensity, 18, 1.4 );
				camera.add( frontLight );

				createCone();

				const grid = new THREE.GridHelper( 8, 16, 0x344055, 0x202838 );
				scene.add( grid );

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

				const controls = new OrbitControls( camera, renderer.domElement );
				controls.target.set( 0, 1.5, 0 );
				controls.update();

				const gui = new GUI();
				gui.add( params, 'retroreflectivity' ).name( 'retroreflectivity' ).onChange( updateMaterial );
				gui.add( params, 'retroreflective', 0, 1, 0.01 ).name( 'retroreflective' ).onChange( updateMaterial );
				gui.add( params, 'frontLightIntensity', 0, 30, 0.1 ).name( 'front light intensity' ).onChange( updateMaterial );

				window.addEventListener( 'resize', onWindowResize );

				updateMaterial();

			}

			function createCone() {

				const cone = new THREE.Group();
				scene.add( cone );

				const orangeMaterial = new THREE.MeshPhysicalNodeMaterial( {
					color: 0xff6a00,
					roughness: 0.45,
					metalness: 0.0
				} );

				bandMaterial = new THREE.MeshPhysicalNodeMaterial( {
					color: 0xf7f0d6,
					roughness: 0.22,
					metalness: 0.0,
					retroreflective: params.retroreflective
				} );

				const base = new THREE.Mesh(
					new THREE.BoxGeometry( 2.6, 0.24, 2.6 ),
					orangeMaterial
				);
				base.position.y = 0.12;
				cone.add( base );

				const bodyHeight = 3.2;
				const bodyBottom = 0.24;
				const bodyRadiusBottom = 1.0;
				const bodyRadiusTop = 0.18;

				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 bandHeight = 0.48;
				const bandCenter = bodyBottom + bodyHeight * 0.52;
				const bandBottom = bandCenter - bandHeight * 0.5;
				const bandTop = bandCenter + bandHeight * 0.5;
				const bandRadiusBottom = radiusAtHeight( bandBottom, bodyBottom, bodyHeight, bodyRadiusBottom, bodyRadiusTop ) * 1.01;
				const bandRadiusTop = radiusAtHeight( bandTop, bodyBottom, bodyHeight, bodyRadiusBottom, bodyRadiusTop ) * 1.01;

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

			}

			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 updateMaterial() {

				bandMaterial.retroreflective = params.retroreflectivity ? params.retroreflective : 0;
				frontLight.intensity = params.frontLightIntensity;

			}

			function onWindowResize() {

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

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

			}

			function render() {

				renderer.render( scene, camera );

			}

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