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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - ShadowMapViewer example </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> - ShadowMapViewer example by <a href="https://github.com/arya-s">arya-s</a>
</div>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"three": "../build/three.module.js",
"three/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as THREE from 'three';
import Stats from 'three/addons/libs/stats.module.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { ShadowMapViewer } from 'three/addons/utils/ShadowMapViewer.js';
let camera, scene, renderer, clock, stats;
let dirLight, spotLight;
let torusKnot, cube;
let dirLightShadowMapViewer, spotLightShadowMapViewer;
init();
animate();
function init() {
initScene();
initShadowMapViewers();
initMisc();
document.body.appendChild( renderer.domElement );
window.addEventListener( 'resize', onWindowResize );
}
function initScene() {
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.set( 0, 15, 35 );
scene = new THREE.Scene();
// Lights
scene.add( new THREE.AmbientLight( 0x404040 ) );
spotLight = new THREE.SpotLight( 0xffffff );
spotLight.name = 'Spot Light';
spotLight.angle = Math.PI / 5;
spotLight.penumbra = 0.3;
spotLight.position.set( 10, 10, 5 );
spotLight.castShadow = true;
spotLight.shadow.camera.near = 8;
spotLight.shadow.camera.far = 30;
spotLight.shadow.mapSize.width = 1024;
spotLight.shadow.mapSize.height = 1024;
scene.add( spotLight );
scene.add( new THREE.CameraHelper( spotLight.shadow.camera ) );
dirLight = new THREE.DirectionalLight( 0xffffff, 1 );
dirLight.name = 'Dir. Light';
dirLight.position.set( 0, 10, 0 );
dirLight.castShadow = true;
dirLight.shadow.camera.near = 1;
dirLight.shadow.camera.far = 10;
dirLight.shadow.camera.right = 15;
dirLight.shadow.camera.left = - 15;
dirLight.shadow.camera.top = 15;
dirLight.shadow.camera.bottom = - 15;
dirLight.shadow.mapSize.width = 1024;
dirLight.shadow.mapSize.height = 1024;
scene.add( dirLight );
scene.add( new THREE.CameraHelper( dirLight.shadow.camera ) );
// Geometry
let geometry = new THREE.TorusKnotGeometry( 25, 8, 75, 20 );
let material = new THREE.MeshPhongMaterial( {
color: 0xff0000,
shininess: 150,
specular: 0x222222
} );
torusKnot = new THREE.Mesh( geometry, material );
torusKnot.scale.multiplyScalar( 1 / 18 );
torusKnot.position.y = 3;
torusKnot.castShadow = true;
torusKnot.receiveShadow = true;
scene.add( torusKnot );
geometry = new THREE.BoxGeometry( 3, 3, 3 );
cube = new THREE.Mesh( geometry, material );
cube.position.set( 8, 3, 8 );
cube.castShadow = true;
cube.receiveShadow = true;
scene.add( cube );
geometry = new THREE.BoxGeometry( 10, 0.15, 10 );
material = new THREE.MeshPhongMaterial( {
color: 0xa0adaf,
shininess: 150,
specular: 0x111111
} );
const ground = new THREE.Mesh( geometry, material );
ground.scale.multiplyScalar( 3 );
ground.castShadow = false;
ground.receiveShadow = true;
scene.add( ground );
}
function initShadowMapViewers() {
dirLightShadowMapViewer = new ShadowMapViewer( dirLight );
spotLightShadowMapViewer = new ShadowMapViewer( spotLight );
resizeShadowMapViewers();
}
function initMisc() {
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.BasicShadowMap;
// Mouse control
const controls = new OrbitControls( camera, renderer.domElement );
controls.target.set( 0, 2, 0 );
controls.update();
clock = new THREE.Clock();
stats = new Stats();
document.body.appendChild( stats.dom );
}
function resizeShadowMapViewers() {
const size = window.innerWidth * 0.15;
dirLightShadowMapViewer.position.x = 10;
dirLightShadowMapViewer.position.y = 10;
dirLightShadowMapViewer.size.width = size;
dirLightShadowMapViewer.size.height = size;
dirLightShadowMapViewer.update(); //Required when setting position or size directly
spotLightShadowMapViewer.size.set( size, size );
spotLightShadowMapViewer.position.set( size + 20, 10 );
// spotLightShadowMapViewer.update(); //NOT required because .set updates automatically
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
resizeShadowMapViewers();
dirLightShadowMapViewer.updateForWindowResize();
spotLightShadowMapViewer.updateForWindowResize();
}
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function renderScene() {
renderer.render( scene, camera );
}
function renderShadowMapViewers() {
dirLightShadowMapViewer.render( renderer );
spotLightShadowMapViewer.render( renderer );
}
function render() {
const delta = clock.getDelta();
renderScene();
renderShadowMapViewers();
torusKnot.rotation.x += 0.25 * delta;
torusKnot.rotation.y += 2 * delta;
torusKnot.rotation.z += 1 * delta;
cube.rotation.x += 0.25 * delta;
cube.rotation.y += 2 * delta;
cube.rotation.z += 1 * delta;
}
</script>
</body>
</html>