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237 lines
6.8 KiB
237 lines
6.8 KiB
3 years ago
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<!-- Licensed under a BSD license. See license.html for license -->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<title>Three.js - Shadows - Spot Light w/CameraHelper</title>
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<style>
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html, body {
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margin: 0;
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height: 100%;
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}
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#c {
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width: 100%;
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height: 100%;
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display: block;
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}
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</style>
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</head>
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<body>
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<canvas id="c"></canvas>
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</body>
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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/": "../../examples/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 {OrbitControls} from 'three/addons/controls/OrbitControls.js';
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import {GUI} from 'three/addons/libs/lil-gui.module.min.js';
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function main() {
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const canvas = document.querySelector('#c');
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const renderer = new THREE.WebGLRenderer({canvas});
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renderer.shadowMap.enabled = true;
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const fov = 45;
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const aspect = 2; // the canvas default
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const near = 0.1;
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const far = 100;
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const camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
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camera.position.set(0, 10, 20);
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const controls = new OrbitControls(camera, canvas);
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controls.target.set(0, 5, 0);
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controls.update();
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const scene = new THREE.Scene();
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scene.background = new THREE.Color('black');
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{
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const planeSize = 40;
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const loader = new THREE.TextureLoader();
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const texture = loader.load('resources/images/checker.png');
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texture.wrapS = THREE.RepeatWrapping;
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texture.wrapT = THREE.RepeatWrapping;
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texture.magFilter = THREE.NearestFilter;
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const repeats = planeSize / 2;
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texture.repeat.set(repeats, repeats);
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const planeGeo = new THREE.PlaneGeometry(planeSize, planeSize);
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const planeMat = new THREE.MeshPhongMaterial({
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map: texture,
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side: THREE.DoubleSide,
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});
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const mesh = new THREE.Mesh(planeGeo, planeMat);
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mesh.receiveShadow = true;
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mesh.rotation.x = Math.PI * -.5;
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scene.add(mesh);
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}
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{
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const cubeSize = 4;
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const cubeGeo = new THREE.BoxGeometry(cubeSize, cubeSize, cubeSize);
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const cubeMat = new THREE.MeshPhongMaterial({color: '#8AC'});
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const mesh = new THREE.Mesh(cubeGeo, cubeMat);
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mesh.castShadow = true;
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mesh.receiveShadow = true;
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mesh.position.set(cubeSize + 1, cubeSize / 2, 0);
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scene.add(mesh);
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}
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{
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const sphereRadius = 3;
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const sphereWidthDivisions = 32;
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const sphereHeightDivisions = 16;
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const sphereGeo = new THREE.SphereGeometry(sphereRadius, sphereWidthDivisions, sphereHeightDivisions);
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const sphereMat = new THREE.MeshPhongMaterial({color: '#CA8'});
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const mesh = new THREE.Mesh(sphereGeo, sphereMat);
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mesh.castShadow = true;
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mesh.receiveShadow = true;
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mesh.position.set(-sphereRadius - 1, sphereRadius + 2, 0);
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scene.add(mesh);
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}
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class ColorGUIHelper {
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constructor(object, prop) {
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this.object = object;
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this.prop = prop;
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}
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get value() {
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return `#${this.object[this.prop].getHexString()}`;
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}
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set value(hexString) {
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this.object[this.prop].set(hexString);
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}
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}
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function makeXYZGUI(gui, vector3, name, onChangeFn) {
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const folder = gui.addFolder(name);
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folder.add(vector3, 'x', -10, 10).onChange(onChangeFn);
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folder.add(vector3, 'y', 0, 10).onChange(onChangeFn);
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folder.add(vector3, 'z', -10, 10).onChange(onChangeFn);
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// folder.open();
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}
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{
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const color = 0xFFFFFF;
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const intensity = 1;
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const light = new THREE.SpotLight(color, intensity);
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light.castShadow = true;
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light.position.set(0, 10, 0);
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light.target.position.set(-4, 0, -4);
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scene.add(light);
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scene.add(light.target);
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const cameraHelper = new THREE.CameraHelper(light.shadow.camera);
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scene.add(cameraHelper);
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function updateCamera() {
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// update the light target's matrixWorld because it's needed by the helper
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light.target.updateMatrixWorld();
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// update the light's shadow camera's projection matrix
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light.shadow.camera.updateProjectionMatrix();
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// and now update the camera helper we're using to show the light's shadow camera
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cameraHelper.update();
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}
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updateCamera();
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setTimeout(updateCamera);
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class MinMaxGUIHelper {
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constructor(obj, minProp, maxProp, minDif) {
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this.obj = obj;
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this.minProp = minProp;
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this.maxProp = maxProp;
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this.minDif = minDif;
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}
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get min() {
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return this.obj[this.minProp];
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}
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set min(v) {
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this.obj[this.minProp] = v;
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this.obj[this.maxProp] = Math.max(this.obj[this.maxProp], v + this.minDif);
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}
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get max() {
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return this.obj[this.maxProp];
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}
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set max(v) {
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this.obj[this.maxProp] = v;
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this.min = this.min; // this will call the min setter
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}
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}
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class DegRadHelper {
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constructor(obj, prop) {
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this.obj = obj;
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this.prop = prop;
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}
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get value() {
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return THREE.MathUtils.radToDeg(this.obj[this.prop]);
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}
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set value(v) {
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this.obj[this.prop] = THREE.MathUtils.degToRad(v);
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}
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}
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const gui = new GUI();
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gui.addColor(new ColorGUIHelper(light, 'color'), 'value').name('color');
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gui.add(light, 'intensity', 0, 2, 0.01);
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gui.add(light, 'distance', 0, 40).onChange(updateCamera);
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gui.add(new DegRadHelper(light, 'angle'), 'value', 0, 90).name('angle').onChange(updateCamera);
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gui.add(light, 'penumbra', 0, 1, 0.01);
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{
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const folder = gui.addFolder('Shadow Camera');
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folder.open();
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const minMaxGUIHelper = new MinMaxGUIHelper(light.shadow.camera, 'near', 'far', 0.1);
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folder.add(minMaxGUIHelper, 'min', 0.1, 50, 0.1).name('near').onChange(updateCamera);
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folder.add(minMaxGUIHelper, 'max', 0.1, 50, 0.1).name('far').onChange(updateCamera);
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}
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makeXYZGUI(gui, light.position, 'position', updateCamera);
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makeXYZGUI(gui, light.target.position, 'target', updateCamera);
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}
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function resizeRendererToDisplaySize(renderer) {
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const canvas = renderer.domElement;
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const width = canvas.clientWidth;
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const height = canvas.clientHeight;
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const needResize = canvas.width !== width || canvas.height !== height;
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if (needResize) {
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renderer.setSize(width, height, false);
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}
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return needResize;
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}
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function render() {
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resizeRendererToDisplaySize(renderer);
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{
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const canvas = renderer.domElement;
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camera.aspect = canvas.clientWidth / canvas.clientHeight;
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camera.updateProjectionMatrix();
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}
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renderer.render(scene, camera);
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requestAnimationFrame(render);
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}
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requestAnimationFrame(render);
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}
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main();
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</script>
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</html>
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