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- <!-- Licensed under a BSD license. See license.html for license -->
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
- <title>Three.js - Lights - Spot w/Helper</title>
- <style>
- html, body {
- margin: 0;
- height: 100%;
- }
- #c {
- width: 100%;
- height: 100%;
- display: block;
- }
- </style>
- </head>
- <body>
- <canvas id="c"></canvas>
- </body>
- <script type="importmap">
- {
- "imports": {
- "three": "../../build/three.module.js",
- "three/addons/": "../../examples/jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- function main() {
- const canvas = document.querySelector( '#c' );
- const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
- const fov = 45;
- const aspect = 2; // the canvas default
- const near = 0.1;
- const far = 100;
- const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
- camera.position.set( 0, 10, 20 );
- const controls = new OrbitControls( camera, canvas );
- controls.target.set( 0, 5, 0 );
- controls.update();
- const scene = new THREE.Scene();
- scene.background = new THREE.Color( 'black' );
- {
- const planeSize = 40;
- const loader = new THREE.TextureLoader();
- const texture = loader.load( 'resources/images/checker.png' );
- texture.wrapS = THREE.RepeatWrapping;
- texture.wrapT = THREE.RepeatWrapping;
- texture.magFilter = THREE.NearestFilter;
- texture.colorSpace = THREE.SRGBColorSpace;
- const repeats = planeSize / 2;
- texture.repeat.set( repeats, repeats );
- const planeGeo = new THREE.PlaneGeometry( planeSize, planeSize );
- const planeMat = new THREE.MeshPhongMaterial( {
- map: texture,
- side: THREE.DoubleSide,
- } );
- const mesh = new THREE.Mesh( planeGeo, planeMat );
- mesh.rotation.x = Math.PI * - .5;
- scene.add( mesh );
- }
- {
- const cubeSize = 4;
- const cubeGeo = new THREE.BoxGeometry( cubeSize, cubeSize, cubeSize );
- const cubeMat = new THREE.MeshPhongMaterial( { color: '#8AC' } );
- const mesh = new THREE.Mesh( cubeGeo, cubeMat );
- mesh.position.set( cubeSize + 1, cubeSize / 2, 0 );
- scene.add( mesh );
- }
- {
- const sphereRadius = 3;
- const sphereWidthDivisions = 32;
- const sphereHeightDivisions = 16;
- const sphereGeo = new THREE.SphereGeometry( sphereRadius, sphereWidthDivisions, sphereHeightDivisions );
- const sphereMat = new THREE.MeshPhongMaterial( { color: '#CA8' } );
- const mesh = new THREE.Mesh( sphereGeo, sphereMat );
- mesh.position.set( - sphereRadius - 1, sphereRadius + 2, 0 );
- scene.add( mesh );
- }
- class ColorGUIHelper {
- constructor( object, prop ) {
- this.object = object;
- this.prop = prop;
- }
- get value() {
- return `#${this.object[ this.prop ].getHexString()}`;
- }
- set value( hexString ) {
- this.object[ this.prop ].set( hexString );
- }
- }
- class DegRadHelper {
- constructor( obj, prop ) {
- this.obj = obj;
- this.prop = prop;
- }
- get value() {
- return THREE.MathUtils.radToDeg( this.obj[ this.prop ] );
- }
- set value( v ) {
- this.obj[ this.prop ] = THREE.MathUtils.degToRad( v );
- }
- }
- function makeXYZGUI( gui, vector3, name, onChangeFn ) {
- const folder = gui.addFolder( name );
- folder.add( vector3, 'x', - 10, 10 ).onChange( onChangeFn );
- folder.add( vector3, 'y', 0, 10 ).onChange( onChangeFn );
- folder.add( vector3, 'z', - 10, 10 ).onChange( onChangeFn );
- folder.open();
- }
- {
- const color = 0xFFFFFF;
- const intensity = 150;
- const light = new THREE.SpotLight( color, intensity );
- light.position.set( 0, 10, 0 );
- light.target.position.set( - 5, 0, 0 );
- scene.add( light );
- scene.add( light.target );
- const helper = new THREE.SpotLightHelper( light );
- scene.add( helper );
- function updateLight() {
- light.target.updateMatrixWorld();
- helper.update();
- }
- updateLight();
- const gui = new GUI();
- gui.addColor( new ColorGUIHelper( light, 'color' ), 'value' ).name( 'color' );
- gui.add( light, 'intensity', 0, 250, 1 );
- gui.add( light, 'distance', 0, 40 ).onChange( updateLight );
- gui.add( new DegRadHelper( light, 'angle' ), 'value', 0, 90 ).name( 'angle' ).onChange( updateLight );
- gui.add( light, 'penumbra', 0, 1, 0.01 );
- makeXYZGUI( gui, light.position, 'position', updateLight );
- makeXYZGUI( gui, light.target.position, 'target', updateLight );
- }
- function resizeRendererToDisplaySize( renderer ) {
- const canvas = renderer.domElement;
- const width = canvas.clientWidth;
- const height = canvas.clientHeight;
- const needResize = canvas.width !== width || canvas.height !== height;
- if ( needResize ) {
- renderer.setSize( width, height, false );
- }
- return needResize;
- }
- function render() {
- if ( resizeRendererToDisplaySize( renderer ) ) {
- const canvas = renderer.domElement;
- camera.aspect = canvas.clientWidth / canvas.clientHeight;
- camera.updateProjectionMatrix();
- }
- renderer.render( scene, camera );
- requestAnimationFrame( render );
- }
- requestAnimationFrame( render );
- }
- main();
- </script>
- </html>
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