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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - lights - spot 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> - SpotLights<br/>
- by <a href="http://master-domain.com" target="_blank" rel="noopener">Master James</a>
- </div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import TWEEN from 'three/addons/libs/tween.module.js';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- const renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- const camera = new THREE.PerspectiveCamera( 35, window.innerWidth / window.innerHeight, 0.1, 100 );
- const controls = new OrbitControls( camera, renderer.domElement );
- const scene = new THREE.Scene();
- const matFloor = new THREE.MeshPhongMaterial( { color: 0x808080 } );
- const matBox = new THREE.MeshPhongMaterial( { color: 0xaaaaaa } );
- const geoFloor = new THREE.PlaneGeometry( 100, 100 );
- const geoBox = new THREE.BoxGeometry( 0.3, 0.1, 0.2 );
- const mshFloor = new THREE.Mesh( geoFloor, matFloor );
- mshFloor.rotation.x = - Math.PI * 0.5;
- const mshBox = new THREE.Mesh( geoBox, matBox );
- const ambient = new THREE.AmbientLight( 0x444444 );
- const spotLight1 = createSpotlight( 0xFF7F00 );
- const spotLight2 = createSpotlight( 0x00FF7F );
- const spotLight3 = createSpotlight( 0x7F00FF );
- let lightHelper1, lightHelper2, lightHelper3;
- function init() {
- renderer.shadowMap.enabled = true;
- renderer.shadowMap.type = THREE.PCFSoftShadowMap;
- camera.position.set( 4.6, 2.2, - 2.1 );
- spotLight1.position.set( 1.5, 4, 4.5 );
- spotLight2.position.set( 0, 4, 3.5 );
- spotLight3.position.set( - 1.5, 4, 4.5 );
- lightHelper1 = new THREE.SpotLightHelper( spotLight1 );
- lightHelper2 = new THREE.SpotLightHelper( spotLight2 );
- lightHelper3 = new THREE.SpotLightHelper( spotLight3 );
- mshFloor.receiveShadow = true;
- mshFloor.position.set( 0, - 0.05, 0 );
- mshBox.castShadow = true;
- mshBox.receiveShadow = true;
- mshBox.position.set( 0, 0.5, 0 );
- scene.add( mshFloor );
- scene.add( mshBox );
- scene.add( ambient );
- scene.add( spotLight1, spotLight2, spotLight3 );
- scene.add( lightHelper1, lightHelper2, lightHelper3 );
- document.body.appendChild( renderer.domElement );
- window.addEventListener( 'resize', onWindowResize );
- controls.target.set( 0, 0.5, 0 );
- controls.maxPolarAngle = Math.PI / 2;
- controls.minDistance = 1;
- controls.maxDistance = 10;
- controls.update();
- }
- function createSpotlight( color ) {
- const newObj = new THREE.SpotLight( color, 10 );
- newObj.castShadow = true;
- newObj.angle = 0.3;
- newObj.penumbra = 0.2;
- newObj.decay = 2;
- newObj.distance = 50;
- return newObj;
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function tween( light ) {
- new TWEEN.Tween( light ).to( {
- angle: ( Math.random() * 0.7 ) + 0.1,
- penumbra: Math.random() + 1
- }, Math.random() * 3000 + 2000 )
- .easing( TWEEN.Easing.Quadratic.Out ).start();
- new TWEEN.Tween( light.position ).to( {
- x: ( Math.random() * 3 ) - 1.5,
- y: ( Math.random() * 1 ) + 1.5,
- z: ( Math.random() * 3 ) - 1.5
- }, Math.random() * 3000 + 2000 )
- .easing( TWEEN.Easing.Quadratic.Out ).start();
- }
- function updateTweens() {
- tween( spotLight1 );
- tween( spotLight2 );
- tween( spotLight3 );
- setTimeout( updateTweens, 5000 );
- }
- function animate() {
- TWEEN.update();
- if ( lightHelper1 ) lightHelper1.update();
- if ( lightHelper2 ) lightHelper2.update();
- if ( lightHelper3 ) lightHelper3.update();
- renderer.render( scene, camera );
- }
- init();
- updateTweens();
- </script>
- </body>
- </html>
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