Three.js 视频地板教程

视频地板 ·Video Floor· ▶ 在线运行案例

• 案例合集：三维可视化功能案例（threehub.cn）
• 开源仓库github地址：https://github.com/z2586300277/three-cesium-examples
• 400个案例代码:网盘链接

你将学到什么

• OrbitControls 相机轨道交互
• requestAnimationFrame渲染循环与resize自适应

效果说明

本案例演示视频地板效果：基于 WebGL 实现「视频地板」可视化效果，附完整可运行源码；核心用到 OrbitControls。建议先打开文首在线案例查看动态画面，再对照下方源码逐步理解。

核心概念

• OrbitControls轨道旋转缩放；开enableDamping时每帧需controls.update()。

实现步骤

• 搭建 Scene / Camera / Renderer 与 OrbitControls
• rAF 循环中 update 并 render

• 代码要点

  import * as THREE from 'three'
  import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js'
  const box = document.getElementById('box')
  const scene = new THREE.Scene()
  const camera = new THREE.PerspectiveCamera(75, box.clientWidth / box.clientHeight, 0.1, 100000)
  camera.position.set(2, 2, 2)
  const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true, logarithmicDepthBuffer: true })
  renderer.setPixelRatio(window.devicePixelRatio * 1.5)
  renderer.setSize(box.clientWidth, box.clientHeight)
  box.appendChild(renderer.domElement)
  const controls = new OrbitControls(camera, renderer.domElement) controls.enableDamping = true
  scene.add(new THREE.AxesHelper(100), new THREE.GridHelper(100, 10))
  const directionalLight = new THREE.DirectionalLight(0xffffff, 3) directionalLight.position.set(5, 5, 5) scene.add(directionalLight)
  const ambientLight = new THREE.AmbientLight(0xffffff, 2) scene.add(ambientLight)
  animate()
  function animate() {
  controls.update()
  requestAnimationFrame(animate)
  renderer.render(scene, camera)
  }
  window.onresize = () => {
  renderer.setSize(box.clientWidth, box.clientHeight)
  camera.aspect = box.clientWidth / box.clientHeight
  camera.updateProjectionMatrix()
  }
  async function createVideoPlane(url, width, height, positionY) {
  const video = document.createElement('video') video.crossOrigin = 'anonymous' video.src = url video.loop = true video.muted = true video.play() const texture = new THREE.VideoTexture(video) const geometry = new THREE.PlaneGeometry(width, height)
  const material = new THREE.MeshStandardMaterial({ color: 0xffffff * Math.random(), // 随机颜色 alphaMap: texture, opecity: 0.5, // 透明度，可调整 transparent: true, side: THREE.DoubleSide, })
  const mesh = new THREE.Mesh(geometry, material) mesh.rotation.x = -Math.PI / 2 mesh.position.set(0, positionY, 0) // 设置位置 scene.add(mesh) }
  createVideoPlane(FILE_HOST + 'files/video/c1.mp4', 3, 3 , 0.01) createVideoPlane(FILE_HOST + 'files/video/c2.mp4', 4, 4, 0) createVideoPlane(FILE_HOST + 'files/video/c3.mp4', 5, 5, -0.01)

  完整源码：GitHub

  小结

  • 本文提供视频地板完整 Three.js 源码与在线 Demo，建议先运行案例再改 uniform/参数做二次实验
  • 更多 Three.js 实战案例见 three-cesium-examples 合集 与 GitHub 开源仓库