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196 lines
5.0 KiB
196 lines
5.0 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - THREE.PointLight ShadowMap</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - THREE.PointLight ShadowMap by <a href="https://github.com/mkkellogg">mkkellogg</a>
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</div>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import Stats from 'three/addons/libs/stats.module.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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let camera, scene, renderer, stats;
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let pointLight, pointLight2;
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init();
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animate();
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function init() {
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camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 1000 );
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camera.position.set( 0, 10, 40 );
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scene = new THREE.Scene();
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scene.add( new THREE.AmbientLight( 0x111122 ) );
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// lights
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function createLight( color ) {
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const intensity = 2;
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const light = new THREE.PointLight( color, intensity, 20 );
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light.castShadow = true;
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light.shadow.bias = - 0.005; // reduces self-shadowing on double-sided objects
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let geometry = new THREE.SphereGeometry( 0.3, 12, 6 );
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let material = new THREE.MeshBasicMaterial( { color: color } );
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material.color.multiplyScalar( intensity );
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let sphere = new THREE.Mesh( geometry, material );
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light.add( sphere );
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const texture = new THREE.CanvasTexture( generateTexture() );
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texture.magFilter = THREE.NearestFilter;
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texture.wrapT = THREE.RepeatWrapping;
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texture.wrapS = THREE.RepeatWrapping;
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texture.repeat.set( 1, 4.5 );
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geometry = new THREE.SphereGeometry( 2, 32, 8 );
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material = new THREE.MeshPhongMaterial( {
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side: THREE.DoubleSide,
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alphaMap: texture,
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alphaTest: 0.5
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} );
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sphere = new THREE.Mesh( geometry, material );
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sphere.castShadow = true;
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sphere.receiveShadow = true;
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light.add( sphere );
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// custom distance material
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const distanceMaterial = new THREE.MeshDistanceMaterial( {
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alphaMap: material.alphaMap,
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alphaTest: material.alphaTest
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} );
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sphere.customDistanceMaterial = distanceMaterial;
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return light;
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}
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pointLight = createLight( 0x0088ff );
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scene.add( pointLight );
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pointLight2 = createLight( 0xff8888 );
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scene.add( pointLight2 );
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//
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const geometry = new THREE.BoxGeometry( 30, 30, 30 );
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const material = new THREE.MeshPhongMaterial( {
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color: 0xa0adaf,
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shininess: 10,
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specular: 0x111111,
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side: THREE.BackSide
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} );
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const mesh = new THREE.Mesh( geometry, material );
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mesh.position.y = 10;
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mesh.receiveShadow = true;
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scene.add( mesh );
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//
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.shadowMap.enabled = true;
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renderer.shadowMap.type = THREE.BasicShadowMap;
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document.body.appendChild( renderer.domElement );
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const controls = new OrbitControls( camera, renderer.domElement );
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controls.target.set( 0, 10, 0 );
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controls.update();
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stats = new Stats();
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document.body.appendChild( stats.dom );
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//
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window.addEventListener( 'resize', onWindowResize );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function generateTexture() {
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const canvas = document.createElement( 'canvas' );
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canvas.width = 2;
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canvas.height = 2;
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const context = canvas.getContext( '2d' );
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context.fillStyle = 'white';
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context.fillRect( 0, 1, 2, 1 );
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return canvas;
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}
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function animate() {
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requestAnimationFrame( animate );
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render();
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}
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function render() {
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let time = performance.now() * 0.001;
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pointLight.position.x = Math.sin( time * 0.6 ) * 9;
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pointLight.position.y = Math.sin( time * 0.7 ) * 9 + 6;
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pointLight.position.z = Math.sin( time * 0.8 ) * 9;
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pointLight.rotation.x = time;
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pointLight.rotation.z = time;
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time += 10000;
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pointLight2.position.x = Math.sin( time * 0.6 ) * 9;
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pointLight2.position.y = Math.sin( time * 0.7 ) * 9 + 6;
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pointLight2.position.z = Math.sin( time * 0.8 ) * 9;
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pointLight2.rotation.x = time;
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pointLight2.rotation.z = time;
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renderer.render( scene, camera );
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stats.update();
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}
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</script>
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</body>
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</html>
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