samien
/
three.js
oglindă de https://github.com/mrdoob/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - lights - circle area light</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="main.css">
	</head>
	<body>

		<div id="info">
			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - THREE.CircleAreaLight with Shadows<br/>
			CircleAreaLight approximates circular light sources using LTC and PCSS
		</div>

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

		<script type="module">

			import * as THREE from 'three';

			import Stats from 'three/addons/libs/stats.module.js';
			import { GUI } from 'three/addons/libs/lil-gui.module.min.js';

			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import { CircleAreaLightHelper } from 'three/addons/helpers/CircleAreaLightHelper.js';
			import { RectAreaLightUniformsLib } from 'three/addons/lights/RectAreaLightUniformsLib.js';

			let renderer, scene, camera;
			let stats, meshKnot, meshFloor;
			let circleLight1, circleLight2, circleLight3;
			let animateLights = true;

			init();

			function init() {

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animation );
				renderer.shadowMap.enabled = true;
				renderer.shadowMap.type = THREE.PCFSoftShadowMap;
				document.body.appendChild( renderer.domElement );

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.set( 0, 5, - 15 );

				scene = new THREE.Scene();

				// CircleAreaLight uses the same LTC textures as RectAreaLight
				RectAreaLightUniformsLib.init();

				circleLight1 = new THREE.CircleAreaLight( 0xff0000, 5, 4 );
				circleLight1.position.set( - 5, 5, 5 );
				circleLight1.lookAt( 0, 0, 0 );
				circleLight1.castShadow = true;
				circleLight1.shadow.mapSize.width = 2048;
				circleLight1.shadow.mapSize.height = 2048;
				circleLight1.shadow.bias = - 0.001;
				scene.add( circleLight1 );

				circleLight2 = new THREE.CircleAreaLight( 0x00ff00, 5, 4 );
				circleLight2.position.set( 0, 5, 5 );
				circleLight2.lookAt( 0, 0, 0 );
				circleLight2.castShadow = true;
				circleLight2.shadow.mapSize.width = 2048;
				circleLight2.shadow.mapSize.height = 2048;
				circleLight2.shadow.bias = - 0.001;
				scene.add( circleLight2 );

				circleLight3 = new THREE.CircleAreaLight( 0x0000ff, 5, 4 );
				circleLight3.position.set( 5, 5, 5 );
				circleLight3.lookAt( 0, 0, 0 );
				circleLight3.castShadow = true;
				circleLight3.shadow.mapSize.width = 2048;
				circleLight3.shadow.mapSize.height = 2048;
				circleLight3.shadow.bias = - 0.001;
				scene.add( circleLight3 );

				scene.add( new CircleAreaLightHelper( circleLight1 ) );
				scene.add( new CircleAreaLightHelper( circleLight2 ) );
				scene.add( new CircleAreaLightHelper( circleLight3 ) );

				const geoFloor = new THREE.BoxGeometry( 2000, 0.1, 2000 );
				const matStdFloor = new THREE.MeshStandardMaterial( { color: 0xbcbcbc, roughness: 0.1, metalness: 0 } );
				meshFloor = new THREE.Mesh( geoFloor, matStdFloor );
				meshFloor.receiveShadow = true;
				scene.add( meshFloor );

				const geoKnot = new THREE.TorusKnotGeometry( 1.5, 0.5, 200, 16 );
				const matKnot = new THREE.MeshStandardMaterial( { color: 0xffffff, roughness: 0, metalness: 0 } );
				meshKnot = new THREE.Mesh( geoKnot, matKnot );
				meshKnot.position.set( 0, 5, 0 );
				meshKnot.castShadow = true;
				meshKnot.receiveShadow = true;
				scene.add( meshKnot );

				const controls = new OrbitControls( camera, renderer.domElement );
				controls.target.copy( meshKnot.position );
				controls.update();

				//

				window.addEventListener( 'resize', onWindowResize );

				stats = new Stats();
				document.body.appendChild( stats.dom );

				// GUI
				const gui = new GUI();

				const params = {
					animateLights: animateLights
				};

				gui.add( params, 'animateLights' ).name( 'Animate Lights' ).onChange( ( value ) => {

					animateLights = value;

				} );

				const knotFolder = gui.addFolder( 'Torus Knot Material' );
				knotFolder.add( meshKnot.material, 'roughness', 0, 1, 0.01 ).name( 'Roughness' );
				knotFolder.add( meshKnot.material, 'metalness', 0, 1, 0.01 ).name( 'Metalness' );
				knotFolder.open();

				const floorFolder = gui.addFolder( 'Floor Material' );
				floorFolder.add( meshFloor.material, 'roughness', 0, 1, 0.01 ).name( 'Roughness' );
				floorFolder.add( meshFloor.material, 'metalness', 0, 1, 0.01 ).name( 'Metalness' );
				floorFolder.open();

			}

			function onWindowResize() {

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

			}

			function animation( time ) {

				meshKnot.rotation.y = time / 1000;

				if ( animateLights ) {

					// Animate the lights in a circular pattern
					const t = time / 1000;
					const radius = 6;
					const height = 5;

					// Light 1 - Red
					circleLight1.position.x = Math.cos( t ) * radius;
					circleLight1.position.z = Math.sin( t ) * radius;
					circleLight1.position.y = height + Math.sin( t * 2 ) * 2;
					circleLight1.radius = 3 + Math.sin( t * 1.5 ) * 1.5;
					circleLight1.lookAt( 0, 0, 0 );

					// Light 2 - Green (120 degrees offset)
					circleLight2.position.x = Math.cos( t + Math.PI * 2 / 3 ) * radius;
					circleLight2.position.z = Math.sin( t + Math.PI * 2 / 3 ) * radius;
					circleLight2.position.y = height + Math.sin( ( t + Math.PI * 2 / 3 ) * 2 ) * 2;
					circleLight2.radius = 3 + Math.sin( ( t + Math.PI * 2 / 3 ) * 1.5 ) * 1.5;
					circleLight2.lookAt( 0, 0, 0 );

					// Light 3 - Blue (240 degrees offset)
					circleLight3.position.x = Math.cos( t + Math.PI * 4 / 3 ) * radius;
					circleLight3.position.z = Math.sin( t + Math.PI * 4 / 3 ) * radius;
					circleLight3.position.y = height + Math.sin( ( t + Math.PI * 4 / 3 ) * 2 ) * 2;
					circleLight3.radius = 3 + Math.sin( ( t + Math.PI * 4 / 3 ) * 1.5 ) * 1.5;
					circleLight3.lookAt( 0, 0, 0 );

				}

				renderer.render( scene, camera );

				stats.update();

			}

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