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 - building generator</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 - building generator">
		<meta property="og:type" content="website">
		<meta property="og:url" content="https://threejs.org/examples/webgpu_generator_building.html">
		<meta property="og:image" content="https://threejs.org/examples/screenshots/webgpu_generator_building.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>Building Generator</span>
			</div>

			<small>
				A single procedurally generated Neo-Gothic terracotta skyscraper at sunset.			</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 { uniform } from 'three/tsl';

			import { Inspector } from 'three/addons/inspector/Inspector.js';
			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import { SkyMesh } from 'three/addons/objects/SkyMesh.js';
			import { SkyscraperGenerator, createSkyscraperMaterial, pickBuildingColor } from 'three/addons/generators/city/SkyscraperGenerator.js';

			let camera, scene, renderer, controls, generator, building, material;
			let sky, sunLight, pmremGenerator, envScene;

			// reused by updateSun(): the current sun direction and the key-light
			// colours it blends between as the sun nears the horizon or climbs high
			const sun = new THREE.Vector3();
			const sunHorizonColor = new THREE.Color( 0xffb072 );
			const sunMiddayColor = new THREE.Color( 0xfff4e8 );

			// every building takes one flat masonry colour; a uniform lets the seed
			// repick it without recompiling the shared material
			const baseColor = uniform( new THREE.Color( 0xc6c0b2 ) );

			const parameters = {
				seed: 7,
				height: 100,
				width: 34,
				depth: 28,
				floorHeight: 4,
				bayWidth: 2.6,
				chamfer: 5,
				setback: 1.5,
				timeOfDay: 17 // hours: 6 sunrise, 12 noon, 18 sunset
			};

			init();

			async function init() {

				renderer = new THREE.WebGPURenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				renderer.toneMapping = THREE.ACESFilmicToneMapping;
				renderer.toneMappingExposure = 0.25;
				renderer.shadowMap.enabled = true;
				renderer.shadowMap.type = THREE.PCFSoftShadowMap;
				renderer.inspector = new Inspector();
				document.body.appendChild( renderer.domElement );

				await renderer.init();

				pmremGenerator = new THREE.PMREMGenerator( renderer );

				scene = new THREE.Scene();
				scene.environmentIntensity = 0.25; // sky as a soft fill; the sun is the key

				// a physical sky drives both the backdrop and the image-based lighting;
				// updateSun() positions the sun and bakes it into the IBL environment

				sky = new SkyMesh();
				sky.scale.setScalar( 10000 );
				sky.turbidity.value = 8;
				sky.rayleigh.value = 3;
				sky.mieCoefficient.value = 0.008;
				sky.mieDirectionalG.value = 0.88;

				// the sky is baked into the environment map from this scene, then moved
				// to the main scene as the backdrop ( see updateSun )
				envScene = new THREE.Scene();

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 20000 );
				camera.position.set( 120, 95, 155 );

				controls = new OrbitControls( camera, renderer.domElement );
				controls.enableDamping = true;
				controls.target.set( 0, 58, 0 );
				controls.maxPolarAngle = Math.PI * 0.495;
				controls.minDistance = 30;
				controls.maxDistance = 600;
				controls.autoRotate = true;
				controls.autoRotateSpeed = 0.3;
				controls.update();

				// a single directional key aligned with the sky's sun, for the crisp
				// relief shadows the IBL alone can't give. updateSun() and
				// fitShadowCamera() drive its colour, intensity and shadow frustum

				sunLight = new THREE.DirectionalLight();
				sunLight.castShadow = true;
				sunLight.shadow.mapSize.set( 2048, 2048 );
				sunLight.shadow.bias = - 0.0004;
				scene.add( sunLight );
				scene.add( sunLight.target );

				// place the sun ( sky, IBL, key light and shadow ) for the current time
				updateSun();

				// an invisible ground that only catches the tower's shadow, large
				// enough to hold the long shadow the low sun casts
				const ground = new THREE.Mesh(
					new THREE.PlaneGeometry( 2000, 2000 ).rotateX( - Math.PI / 2 ),
					new THREE.ShadowMaterial( { color: 0x000000, opacity: 0.35 } )
				);
				ground.receiveShadow = true;
				scene.add( ground );

				material = createSkyscraperMaterial( baseColor );
				generate();

				const gui = renderer.inspector.createParameters( 'Building' );
				gui.add( parameters, 'seed', 0, 100, 1 ).onChange( generate );
				gui.add( parameters, 'height', 60, 200, 1 ).onChange( generate );
				gui.add( parameters, 'width', 18, 60, 1 ).onChange( generate );
				gui.add( parameters, 'depth', 16, 50, 1 ).onChange( generate );
				gui.add( parameters, 'floorHeight', 3, 6, 0.1 ).onChange( generate );
				gui.add( parameters, 'bayWidth', 1.8, 4.5, 0.1 ).onChange( generate );
				gui.add( parameters, 'chamfer', 0, 10, 0.5 ).onChange( generate );
				gui.add( parameters, 'setback', 0, 4, 0.1 ).onChange( generate );
				gui.add( parameters, 'timeOfDay', 6, 18, 0.1 ).name( 'time of day' ).onChange( updateSun );

				window.addEventListener( 'resize', onWindowResize );

			}

			function generate() {

				if ( building ) {

					scene.remove( building );
					building.geometry.dispose();

				}

				baseColor.value.setHex( pickBuildingColor( parameters.seed ) );

				generator = new SkyscraperGenerator( {
					seed: parameters.seed,
					totalHeight: parameters.height,
					footprint: { width: parameters.width, depth: parameters.depth },
					floorHeight: parameters.floorHeight,
					bayWidth: parameters.bayWidth,
					chamferWidth: parameters.chamfer,
					setbackDepth: parameters.setback
				}, material );
				building = generator.build();
				building.castShadow = building.receiveShadow = true;
				scene.add( building );

				fitShadowCamera();

			}

			function updateSun() {

				// map the time of day to a sun arc: low and warm at dawn / dusk, high and
				// bright at noon, sweeping east → west across the day

				const t = parameters.timeOfDay;
				const u = ( t - 12 ) / 6; // -1 at sunrise, 0 at noon, +1 at sunset
				const elevation = Math.max( 0, 1 - u * u ) * 72; // degrees above the horizon, peaks at noon
				const azimuth = 90 - u * 55; // the sun swings east → west across the day

				sun.setFromSphericalCoords( 1, THREE.MathUtils.degToRad( 90 - elevation ), THREE.MathUtils.degToRad( azimuth ) );
				sky.sunPosition.value.copy( sun );

				// physically-motivated key light: real sunlight is far brighter than the
				// sky, so the sun stays the dominant source and cast shadows read clearly
				// against the soft sky fill. the longer air path near the horizon dims and
				// warms it ( the fill dims with it, as the environment is re-baked below ).

				const sinElevation = Math.sin( THREE.MathUtils.degToRad( elevation ) );
				const transmittance = Math.sqrt( Math.max( sinElevation, 0 ) ); // 0 at the horizon → 1 at the zenith
				sunLight.color.copy( sunHorizonColor ).lerp( sunMiddayColor, transmittance );
				sunLight.intensity = 6 * transmittance; // illuminance perpendicular to the rays; the renderer applies N·L per surface

				// re-bake the sky ( without the sun disc ) into the environment map for IBL

				sky.showSunDisc.value = false;
				envScene.add( sky );
				const env = pmremGenerator.fromScene( envScene ).texture;
				if ( scene.environment ) scene.environment.dispose();
				scene.environment = env;
				sky.showSunDisc.value = true;
				scene.add( sky );

				fitShadowCamera();

			}

			function fitShadowCamera() {

				// fit the directional light's shadow frustum to the tower and the full
				// ground shadow it casts, so a low sun's long shadow isn't clipped

				const height = parameters.height;
				const tipDistance = height / Math.max( sun.y, 0.05 ); // shadow tip on the ground
				const centerX = - sun.x * tipDistance * 0.5;
				const centerZ = - sun.z * tipDistance * 0.5;

				const radius = Math.hypot( parameters.width, parameters.depth ) * 0.5;
				const half = Math.hypot( centerX, centerZ ) + radius + 20;
				const distance = half + height; // place the light clear of the whole scene

				sunLight.target.position.set( centerX, 0, centerZ );
				sunLight.target.updateMatrixWorld();
				sunLight.position.set( centerX + sun.x * distance, sun.y * distance, centerZ + sun.z * distance );

				const shadowCamera = sunLight.shadow.camera;
				shadowCamera.left = - half;
				shadowCamera.right = half;
				shadowCamera.top = half;
				shadowCamera.bottom = - half;
				shadowCamera.near = 1;
				shadowCamera.far = distance * 2;
				shadowCamera.updateProjectionMatrix();

			}

			function onWindowResize() {

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

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

			}

			function animate() {

				controls.update();

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>