CubeCamera Reflections
Description
The CubeCamera object, can be used to create more realistic reflections on volumetric objects such as spheres, cubes and other objects.
The steps to use the THREE.CubeCamera,
- Create a THREE.WebGLCubeRenderTarget
- Create a THREE.CubeCamera
- Create a Material that uses the CubeRenderTargets Texture
- Create a Mesh
- Add the Material to the Mesh
- Add the CubeCamera to the Mesh so that its position always reflects the correct mesh it is projecting from.
- Add the Mesh to the Scene
- In the Render loop, update the CubeCamera. Hide its parent mesh, in case the parent mesh gets picked up in its own render pass.
Code
./src/server/server.ts
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | import express from "express" import path from "path" import http from "http" const port: number = 3000 class App { private server: http.Server private port: number constructor(port: number) { this.port = port const app = express() app.use(express.static(path.join(__dirname, '../client'))) app.use('/build/three.module.js', express.static(path.join(__dirname, '../../node_modules/three/build/three.module.js'))) app.use('/jsm/controls/OrbitControls', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/controls/OrbitControls.js'))) app.use('/jsm/libs/stats.module', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/libs/stats.module.js'))) this.server = new http.Server(app); } public Start() { this.server.listen(this.port, () => { console.log( `Server listening on port ${this.port}.` ) }) } } new App(port).Start() |
./src/client/client.ts
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | import * as THREE from '/build/three.module.js' import { OrbitControls } from '/jsm/controls/OrbitControls' import Stats from '/jsm/libs/stats.module' const scene: THREE.Scene = new THREE.Scene() scene.background = new THREE.Color(0x87ceeb) const ambientLight = new THREE.AmbientLight(0xaaaaaa); scene.add(ambientLight); const light1 = new THREE.PointLight(); light1.position.set(10, 10, 10) light1.castShadow = true light1.shadow.bias = -0.0002 light1.shadow.mapSize.height = 1024 light1.shadow.mapSize.width = 1024 scene.add(light1); const camera: THREE.PerspectiveCamera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.01, 100) camera.position.set(1.75, 1.75, 3.5) const renderer: THREE.WebGLRenderer = new THREE.WebGLRenderer() renderer.setSize(window.innerWidth, window.innerHeight) renderer.shadowMap.enabled = true document.body.appendChild(renderer.domElement) const orbitControls = new OrbitControls(camera, renderer.domElement) orbitControls.dampingFactor = .1 orbitControls.enableDamping = true const planeGeometry: THREE.PlaneGeometry = new THREE.PlaneGeometry(25, 25) const texture = new THREE.TextureLoader().load("img/grid.png") const plane: THREE.Mesh = new THREE.Mesh(planeGeometry, new THREE.MeshPhongMaterial({ map: texture })) plane.rotateX(-Math.PI / 2) plane.receiveShadow = true scene.add(plane) window.addEventListener('resize', onWindowResize, false) function onWindowResize() { camera.aspect = window.innerWidth / window.innerHeight camera.updateProjectionMatrix() renderer.setSize(window.innerWidth, window.innerHeight) render() } const cubeRenderTarget1: THREE.WebGLCubeRenderTarget = new THREE.WebGLCubeRenderTarget(128, { format: THREE.RGBFormat, generateMipmaps: true, minFilter: THREE.LinearMipmapLinearFilter }); const cubeRenderTarget2: THREE.WebGLCubeRenderTarget = new THREE.WebGLCubeRenderTarget(128, { format: THREE.RGBFormat, generateMipmaps: true, minFilter: THREE.LinearMipmapLinearFilter }); const cubeRenderTarget3: THREE.WebGLCubeRenderTarget = new THREE.WebGLCubeRenderTarget(128, { format: THREE.RGBFormat, generateMipmaps: true, minFilter: THREE.LinearMipmapLinearFilter }); const cubeCamera1: THREE.CubeCamera = new THREE.CubeCamera(.1, 1000, cubeRenderTarget1); const cubeCamera2: THREE.CubeCamera = new THREE.CubeCamera(.1, 1000, cubeRenderTarget2); const cubeCamera3: THREE.CubeCamera = new THREE.CubeCamera(.1, 1000, cubeRenderTarget3); const pivot1 = new THREE.Object3D(); scene.add(pivot1); const pivot2 = new THREE.Object3D(); scene.add(pivot2); const pivot3 = new THREE.Object3D(); scene.add(pivot3); const material1 = new THREE.MeshPhongMaterial({ shininess: 100, color: 0xffffff, specular: 0xffaa00, reflectivity: 0.9, envMap: cubeRenderTarget1.texture }); const material2 = new THREE.MeshPhongMaterial({ shininess: 100, color: 0xffffff, reflectivity: 0.9, specular: 0xffaa00, envMap: cubeRenderTarget2.texture }); const material3 = new THREE.MeshPhongMaterial({ shininess: 100, color: 0xffffff, specular: 0xffaa00, reflectivity: 0.9, envMap: cubeRenderTarget3.texture }); const ball1 = new THREE.Mesh(new THREE.SphereGeometry(1, 32, 32), material1); ball1.position.set(1, 1.1, 0); ball1.castShadow = true; ball1.receiveShadow = true; ball1.add(cubeCamera1); pivot1.add(ball1); const ball2 = new THREE.Mesh(new THREE.SphereGeometry(1, 32, 32), material2); ball2.position.set(3.1, 1.1, 0); ball2.castShadow = true; ball2.receiveShadow = true; ball2.add(cubeCamera2); pivot2.add(ball2); const ball3 = new THREE.Mesh(new THREE.SphereGeometry(1, 32, 32), material3); ball3.position.set(5.2, 1.1, 0); ball3.castShadow = true; ball3.receiveShadow = true; ball3.add(cubeCamera3); pivot3.add(ball3); const stats = Stats() document.body.appendChild(stats.dom) const clock: THREE.Clock = new THREE.Clock() var animate = function () { requestAnimationFrame(animate) const delta = clock.getDelta(); ball1.rotateY(-0.2 * delta); pivot1.rotateY(0.2 * delta); ball2.rotateY(-0.3 * delta); pivot2.rotateY(0.3 * delta); ball3.rotateY(-0.4 * delta); pivot3.rotateY(0.4 * delta); orbitControls.update() render() stats.update() }; function render() { ball1.visible = false cubeCamera1.update(renderer, scene); ball1.visible = true ball2.visible = false cubeCamera2.update(renderer, scene); ball2.visible = true ball3.visible = false cubeCamera3.update(renderer, scene); ball3.visible = true renderer.render(scene, camera) } animate(); |