Merge pull request #21016 from mrdoob/rectarealight

Simplified and improved RectAreaLight example

Author: mrdoob

examples/jsm/helpers/RectAreaLightHelper.js

@@ -40,14 +40,12 @@ function RectAreaLightHelper( light, color ) {
 
 	this.add( new Mesh( geometry2, new MeshBasicMaterial( { side: BackSide, fog: false } ) ) );
 
-	this.update();
-
 }
 
 RectAreaLightHelper.prototype = Object.create( Line.prototype );
 RectAreaLightHelper.prototype.constructor = RectAreaLightHelper;
 
-RectAreaLightHelper.prototype.update = function () {
+RectAreaLightHelper.prototype.updateMatrixWorld = function () {
 
 	this.scale.set( 0.5 * this.light.width, 0.5 * this.light.height, 1 );
 
@@ -69,6 +67,9 @@ RectAreaLightHelper.prototype.update = function () {
 
 	}
 
+	this.matrixWorld.copy( this.light.matrixWorld ).scale( this.scale );
+	this.children[ 0 ].matrixWorld.copy( this.matrixWorld );
+
 };
 
 RectAreaLightHelper.prototype.dispose = function () {

examples/screenshots/webgl_lights_rectarealight.jpg

@@ -18,172 +18,64 @@
 			import * as THREE from '../build/three.module.js';
 
 			import Stats from './jsm/libs/stats.module.js';
-			import { GUI } from './jsm/libs/dat.gui.module.js';
 
 			import { OrbitControls } from './jsm/controls/OrbitControls.js';
 			import { RectAreaLightHelper } from './jsm/helpers/RectAreaLightHelper.js';
 			import { RectAreaLightUniformsLib } from './jsm/lights/RectAreaLightUniformsLib.js';
 
 			let renderer, scene, camera;
-
-			const origin = new THREE.Vector3();
-
-			let rectLight, rectLightHelper;
-
-			let param = {};
 			let stats;
 
 			init();
-			animate();
 
 			function init() {
 
 				renderer = new THREE.WebGLRenderer( { antialias: true } );
 				renderer.setPixelRatio( window.devicePixelRatio );
 				renderer.setSize( window.innerWidth, window.innerHeight );
-				renderer.shadowMap.enabled = true;
-				renderer.shadowMap.type = THREE.PCFSoftShadowMap;
+				renderer.setAnimationLoop( animation );
 				renderer.outputEncoding = THREE.sRGBEncoding;
 				document.body.appendChild( renderer.domElement );
 
 				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 1000 );
-				camera.position.set( 0, 20, 35 );
+				camera.position.set( 0, 5, - 15 );
 
 				scene = new THREE.Scene();
 
-				const ambient = new THREE.AmbientLight( 0xffffff, 0.1 );
-				scene.add( ambient );
-
 				RectAreaLightUniformsLib.init();
 
-				rectLight = new THREE.RectAreaLight( 0xffffff, 1, 10, 10 );
-				rectLight.position.set( 5, 5, 0 );
-				scene.add( rectLight );
+				const rectLight1 = new THREE.RectAreaLight( 0xff0000, 5, 4, 10 );
+				rectLight1.position.set( - 5, 5, 5 );
+				scene.add( rectLight1 );
 
-				rectLightHelper = new RectAreaLightHelper( rectLight );
-				rectLight.add( rectLightHelper );
+				const rectLight2 = new THREE.RectAreaLight( 0x00ff00, 5, 4, 10 );
+				rectLight2.position.set( 0, 5, 5 );
+				scene.add( rectLight2 );
+
+				const rectLight3 = new THREE.RectAreaLight( 0x0000ff, 5, 4, 10 );
+				rectLight3.position.set( 5, 5, 5 );
+				scene.add( rectLight3 );
+
+				scene.add( new RectAreaLightHelper( rectLight1 ) );
+				scene.add( new RectAreaLightHelper( rectLight2 ) );
+				scene.add( new RectAreaLightHelper( rectLight3 ) );
 
 				const geoFloor = new THREE.BoxBufferGeometry( 2000, 0.1, 2000 );
-				const matStdFloor = new THREE.MeshStandardMaterial( { color: 0x808080, roughness: 0, metalness: 0 } );
+				const matStdFloor = new THREE.MeshStandardMaterial( { color: 0x808080, roughness: 0.1, metalness: 0 } );
 				const mshStdFloor = new THREE.Mesh( geoFloor, matStdFloor );
 				scene.add( mshStdFloor );
 
-				const matStdObjects = new THREE.MeshStandardMaterial( { color: 0xA00000, roughness: 0, metalness: 0 } );
-
-				const geoBox = new THREE.BoxBufferGeometry( Math.PI, Math.sqrt( 2 ), Math.E );
-				const mshStdBox = new THREE.Mesh( geoBox, matStdObjects );
-				mshStdBox.position.set( 0, 5, 0 );
-				mshStdBox.rotation.set( 0, Math.PI / 2.0, 0 );
-				mshStdBox.castShadow = true;
-				mshStdBox.receiveShadow = true;
-				scene.add( mshStdBox );
-
-				const geoSphere = new THREE.SphereBufferGeometry( 1.5, 32, 32 );
-				const mshStdSphere = new THREE.Mesh( geoSphere, matStdObjects );
-				mshStdSphere.position.set( - 5, 5, 0 );
-				mshStdSphere.castShadow = true;
-				mshStdSphere.receiveShadow = true;
-				scene.add( mshStdSphere );
-
-				const geoKnot = new THREE.TorusKnotBufferGeometry( 1.5, 0.5, 100, 16 );
-				const mshStdKnot = new THREE.Mesh( geoKnot, matStdObjects );
-				mshStdKnot.position.set( 5, 5, 0 );
-				mshStdKnot.castShadow = true;
-				mshStdKnot.receiveShadow = true;
-				scene.add( mshStdKnot );
+				const geoKnot = new THREE.TorusKnotBufferGeometry( 1.5, 0.5, 200, 16 );
+				const matKnot = new THREE.MeshStandardMaterial( { color: 0xffffff, roughness: 0, metalness: 0 } );
+				const meshKnot = new THREE.Mesh( geoKnot, matKnot );
+				meshKnot.name = 'meshKnot';
+				meshKnot.position.set( 0, 5, 0 );
+				scene.add( meshKnot );
 
 				const controls = new OrbitControls( camera, renderer.domElement );
-				controls.target.copy( mshStdBox.position );
+				controls.target.copy( meshKnot.position );
 				controls.update();
 
-				// GUI
-
-				const gui = new GUI( { width: 300 } );
-				gui.open();
-
-				param = {
-					motion: true,
-					width: rectLight.width,
-					height: rectLight.height,
-					color: rectLight.color.getHex(),
-					intensity: rectLight.intensity,
-					'ambient': ambient.intensity,
-					'floor color': matStdFloor.color.getHex(),
-					'object color': matStdObjects.color.getHex(),
-					'roughness': matStdFloor.roughness,
-					'metalness': matStdFloor.metalness
-				};
-
-				gui.add( param, 'motion' );
-
-				const lightFolder = gui.addFolder( 'Light' );
-
-				lightFolder.add( param, 'width', 1, 20 ).step( 0.1 ).onChange( function ( val ) {
-
-					rectLight.width = val;
-
-				} );
-
-				lightFolder.add( param, 'height', 1, 20 ).step( 0.1 ).onChange( function ( val ) {
-
-					rectLight.height = val;
-
-				} );
-
-				lightFolder.addColor( param, 'color' ).onChange( function ( val ) {
-
-					rectLight.color.setHex( val );
-
-				} );
-
-				lightFolder.add( param, 'intensity', 0.0, 4.0 ).step( 0.01 ).onChange( function ( val ) {
-
-					rectLight.intensity = val;
-
-				} );
-
-				lightFolder.add( param, 'ambient', 0.0, 0.2 ).step( 0.01 ).onChange( function ( val ) {
-
-					ambient.intensity = val;
-
-				} );
-
-				lightFolder.open();
-
-				const standardFolder = gui.addFolder( 'Standard Material' );
-
-				standardFolder.addColor( param, 'floor color' ).onChange( function ( val ) {
-
-					matStdFloor.color.setHex( val );
-
-				} );
-
-				standardFolder.addColor( param, 'object color' ).onChange( function ( val ) {
-
-					matStdObjects.color.setHex( val );
-
-				} );
-
-				standardFolder.add( param, 'roughness', 0.0, 1.0 ).step( 0.01 ).onChange( function ( val ) {
-
-					matStdObjects.roughness = val;
-					matStdFloor.roughness = val;
-
-				} );
-
-				// TODO (abelnation): use env map to reflect metal property
-				standardFolder.add( param, 'metalness', 0.0, 1.0 ).step( 0.01 ).onChange( function ( val ) {
-
-					matStdObjects.metalness = val;
-					matStdFloor.metalness = val;
-
-				} );
-
-				standardFolder.open();
-
-				// TODO: rect area light distance
-				// TODO: rect area light decay
-
 				//
 
 				window.addEventListener( 'resize', onResize, false );
@@ -201,30 +93,10 @@
 
 			}
 
-			function animate() {
-
-				requestAnimationFrame( animate );
-
-				if ( param.motion ) {
-
-					const t = ( Date.now() / 2000 );
-
-					// move light in circle around center
-					// change light height with sine curve
-
-					const r = 15.0;
-
-					const lx = r * Math.cos( t );
-					const lz = r * Math.sin( t );
-
-					const ly = 5.0 + 5.0 * Math.sin( t / 3.0 );
-
-					rectLight.position.set( lx, ly, lz );
-					rectLight.lookAt( origin );
-
-				}
+			function animation( time ) {
 
-				rectLightHelper.update();
+				const mesh = scene.getObjectByName( 'meshKnot' );
+				mesh.rotation.y = time / 1000;
 
 				renderer.render( scene, camera );