javascript
/
three.js
mirror de https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - lights - physical lights</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			body {
				background-color: #000;
				margin: 0px;
				overflow: hidden;
			}

			#info {
				position: absolute;
				top: 0px; width: 100%;
				color: #ffffff;
				padding: 5px;
				font-family: Monospace;
				font-size: 13px;
				text-align: center;
			}

			a {
				color: #ff0080;
				text-decoration: none;
			}

			a:hover {
				color: #0080ff;
			}
		</style>
	</head>
	<body>

		<div id="container"></div>
		<div id="info">
			<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - Physically accurate lighting example using a incandescent bulb - by <a href="http://clara.io" target="_blank" rel="noopener">Ben Houston</a><br />
			Using real world scale: Brick cube is 1 meter in size.  Light is 2 meters from floor.  Globe is 25 cm in diameter.<br/>
			Using Reinhard inline tonemapping with real-world light falloff (decay = 2).
		</div>

		<script src="../build/three.js"></script>
		<script src="js/libs/stats.min.js"></script>
		<script src="js/libs/dat.gui.min.js"></script>
		<script src="js/controls/OrbitControls.js"></script>
		<script src="js/WebGL.js"></script>

		<script>

			if ( WEBGL.isWebGLAvailable() === false ) {

				document.body.appendChild( WEBGL.getWebGLErrorMessage() );

			}

			var camera, scene, renderer,
			bulbLight, bulbMat, hemiLight,
			object, loader, stats;
			var ballMat, cubeMat, floorMat;


			// ref for lumens: http://www.power-sure.com/lumens.htm
			var bulbLuminousPowers = {
				"110000 lm (1000W)": 110000,
				"3500 lm (300W)": 3500,
				"1700 lm (100W)": 1700,
				"800 lm (60W)": 800,
				"400 lm (40W)": 400,
				"180 lm (25W)": 180,
				"20 lm (4W)": 20,
				"Off": 0
			};

			// ref for solar irradiances: https://en.wikipedia.org/wiki/Lux
			var hemiLuminousIrradiances = {
				"0.0001 lx (Moonless Night)": 0.0001,
				"0.002 lx (Night Airglow)": 0.002,
				"0.5 lx (Full Moon)": 0.5,
				"3.4 lx (City Twilight)": 3.4,
				"50 lx (Living Room)": 50,
				"100 lx (Very Overcast)": 100,
				"350 lx (Office Room)": 350,
				"400 lx (Sunrise/Sunset)": 400,
				"1000 lx (Overcast)": 1000,
				"18000 lx (Daylight)": 18000,
				"50000 lx (Direct Sun)": 50000
			};

			var params = {
				shadows: true,
				exposure: 0.68,
				bulbPower: Object.keys( bulbLuminousPowers )[ 4 ],
				hemiIrradiance: Object.keys( hemiLuminousIrradiances )[0]
			};


			var clock = new THREE.Clock();

			init();
			animate();

			function init() {

				var container = document.getElementById( 'container' );

				stats = new Stats();
				container.appendChild( stats.dom );


				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.1, 100 );
				camera.position.x = -4;
				camera.position.z = 4;
				camera.position.y = 2;

				scene = new THREE.Scene();

				var bulbGeometry = new THREE.SphereBufferGeometry( 0.02, 16, 8 );
				bulbLight = new THREE.PointLight( 0xffee88, 1, 100, 2 );

				bulbMat = new THREE.MeshStandardMaterial( {
					emissive: 0xffffee,
					emissiveIntensity: 1,
					color: 0x000000
				});
				bulbLight.add( new THREE.Mesh( bulbGeometry, bulbMat ) );
				bulbLight.position.set( 0, 2, 0 );
				bulbLight.castShadow = true;
				scene.add( bulbLight );

				hemiLight = new THREE.HemisphereLight( 0xddeeff, 0x0f0e0d, 0.02 );
				scene.add( hemiLight );

				floorMat = new THREE.MeshStandardMaterial( {
					roughness: 0.8,
					color: 0xffffff,
					metalness: 0.2,
					bumpScale: 0.0005
				});
				var textureLoader = new THREE.TextureLoader();
				textureLoader.load( "textures/hardwood2_diffuse.jpg", function( map ) {
					map.wrapS = THREE.RepeatWrapping;
					map.wrapT = THREE.RepeatWrapping;
					map.anisotropy = 4;
					map.repeat.set( 10, 24 );
					floorMat.map = map;
					floorMat.needsUpdate = true;
				} );
				textureLoader.load( "textures/hardwood2_bump.jpg", function( map ) {
					map.wrapS = THREE.RepeatWrapping;
					map.wrapT = THREE.RepeatWrapping;
					map.anisotropy = 4;
					map.repeat.set( 10, 24 );
					floorMat.bumpMap = map;
					floorMat.needsUpdate = true;
				} );
				textureLoader.load( "textures/hardwood2_roughness.jpg", function( map ) {
					map.wrapS = THREE.RepeatWrapping;
					map.wrapT = THREE.RepeatWrapping;
					map.anisotropy = 4;
					map.repeat.set( 10, 24 );
					floorMat.roughnessMap = map;
					floorMat.needsUpdate = true;
				} );

				cubeMat = new THREE.MeshStandardMaterial( {
					roughness: 0.7,
					color: 0xffffff,
					bumpScale: 0.002,
					metalness: 0.2
				});
				textureLoader.load( "textures/brick_diffuse.jpg", function( map ) {
					map.wrapS = THREE.RepeatWrapping;
					map.wrapT = THREE.RepeatWrapping;
					map.anisotropy = 4;
					map.repeat.set( 1, 1 );
					cubeMat.map = map;
					cubeMat.needsUpdate = true;
				} );
				textureLoader.load( "textures/brick_bump.jpg", function( map ) {
					map.wrapS = THREE.RepeatWrapping;
					map.wrapT = THREE.RepeatWrapping;
					map.anisotropy = 4;
					map.repeat.set( 1, 1 );
					cubeMat.bumpMap = map;
					cubeMat.needsUpdate = true;
				} );

				ballMat = new THREE.MeshStandardMaterial( {
					color: 0xffffff,
					roughness: 0.5,
					metalness: 1.0
				});
				textureLoader.load( "textures/planets/earth_atmos_2048.jpg", function( map ) {
					map.anisotropy = 4;
					ballMat.map = map;
					ballMat.needsUpdate = true;
				} );
				textureLoader.load( "textures/planets/earth_specular_2048.jpg", function( map ) {
					map.anisotropy = 4;
					ballMat.metalnessMap = map;
					ballMat.needsUpdate = true;
				} );

				var floorGeometry = new THREE.PlaneBufferGeometry( 20, 20 );
				var floorMesh = new THREE.Mesh( floorGeometry, floorMat );
				floorMesh.receiveShadow = true;
				floorMesh.rotation.x = -Math.PI / 2.0;
				scene.add( floorMesh );

				var ballGeometry = new THREE.SphereBufferGeometry( 0.5, 32, 32 );
				var ballMesh = new THREE.Mesh( ballGeometry, ballMat );
				ballMesh.position.set( 1, 0.5, 1 );
				ballMesh.rotation.y = Math.PI;
				ballMesh.castShadow = true;
				scene.add( ballMesh );

				var boxGeometry = new THREE.BoxBufferGeometry( 0.5, 0.5, 0.5 );
				var boxMesh = new THREE.Mesh( boxGeometry, cubeMat );
				boxMesh.position.set( -0.5, 0.25, -1 );
				boxMesh.castShadow = true;
				scene.add( boxMesh );

				var boxMesh2 = new THREE.Mesh( boxGeometry, cubeMat );
				boxMesh2.position.set( 0, 0.25, -5 );
				boxMesh2.castShadow = true;
				scene.add( boxMesh2 );

				var boxMesh3 = new THREE.Mesh( boxGeometry, cubeMat );
				boxMesh3.position.set( 7, 0.25, 0 );
				boxMesh3.castShadow = true;
				scene.add( boxMesh3 );


				renderer = new THREE.WebGLRenderer();
				renderer.physicallyCorrectLights = true;
				renderer.gammaInput = true;
				renderer.gammaOutput = true;
				renderer.shadowMap.enabled = true;
				renderer.toneMapping = THREE.ReinhardToneMapping;
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );


				var controls = new THREE.OrbitControls( camera, renderer.domElement );

				window.addEventListener( 'resize', onWindowResize, false );


				var gui = new dat.GUI();

				gui.add( params, 'hemiIrradiance', Object.keys( hemiLuminousIrradiances ) );
				gui.add( params, 'bulbPower', Object.keys( bulbLuminousPowers ) );
				gui.add( params, 'exposure', 0, 1 );
				gui.add( params, 'shadows' );
				gui.open();
			}

			function onWindowResize() {

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

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

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();

			}

			var previousShadowMap = false;

			function render() {

				renderer.toneMappingExposure = Math.pow( params.exposure, 5.0 ); // to allow for very bright scenes.
				renderer.shadowMap.enabled = params.shadows;
				bulbLight.castShadow = params.shadows;
				if( params.shadows !== previousShadowMap ) {
					ballMat.needsUpdate = true;
					cubeMat.needsUpdate = true;
					floorMat.needsUpdate = true;
					previousShadowMap = params.shadows;
				}
				bulbLight.power = bulbLuminousPowers[ params.bulbPower ];
				bulbMat.emissiveIntensity = bulbLight.intensity / Math.pow( 0.02, 2.0 ); // convert from intensity to irradiance at bulb surface

				hemiLight.intensity = hemiLuminousIrradiances[ params.hemiIrradiance ];
				var time = Date.now() * 0.0005;

				bulbLight.position.y = Math.cos( time ) * 0.75 + 1.25;

				renderer.render( scene, camera );

				stats.update();

			}

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