曲线动画 ·Curve Animate· ▶ 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-examples400个案例代码:网盘链接你将学到什么OrbitControls 相机轨道交互CatmullRomCurve3 样条曲线路径glTF/Draco 模型加载与优化BufferGeometry 自定义顶点/索引数据requestAnimationFrame渲染循环与resize自适应效果说明本案例演示曲线动画效果基于 WebGL 实现「曲线动画」可视化效果附完整可运行源码核心用到 OrbitControls、CatmullRomCurve3、glTF/Draco。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Scene / Camera / WebGLRenderer构成最小渲染闭环大场景可开logarithmicDepthBuffer缓解 Z-fighting。OrbitControls提供轨道旋转/缩放开启enableDamping后需在 animate 中controls.update()。曲线类getPoints(n)将贝塞尔/样条离散为路径点再写入 BufferGeometry 驱动飞线或路径动画。实现步骤搭建 Scene、PerspectiveCamera、WebGLRenderer挂载 canvas 并处理resize异步加载模型 / 3D Tiles / GeoJSON 等资源并加入 scene 或 entities用曲线离散点构建 BufferGeometry写入自定义 attribute 驱动动画创建 OrbitControls及 Raycaster 等交互控件若源码包含在requestAnimationFrame循环中更新状态并 renderCesium 为viewer.render或自动渲染代码要点import * as THREE from threeimport { OrbitControls } from three/examples/jsm/controls/OrbitControls.js import { GLTFLoader } from three/examples/jsm/loaders/GLTFLoader.js import { DRACOLoader } from three/examples/jsm/loaders/DRACOLoader.jsconst box document.getElementById(box)const scene new THREE.Scene()const camera new THREE.PerspectiveCamera(75, box.clientWidth / box.clientHeight, 0.1, 1000)camera.position.set(30, 30, 30)const renderer new THREE.WebGLRenderer({ antialias: true, alpha: true, logarithmicDepthBuffer: true })renderer.setSize(box.clientWidth, box.clientHeight)box.appendChild(renderer.domElement)new OrbitControls(camera, renderer.domElement)window.onresize () {renderer.setSize(box.clientWidth, box.clientHeight)camera.aspect box.clientWidth / box.clientHeightcamera.updateProjectionMatrix()}scene.add(new THREE.AmbientLight(0xffffff, 4))scene.add(new THREE.AxesHelper(1000))// 创建一个曲线 const curve new THREE.CatmullRomCurve3([new THREE.Vector3(0, 0, 0),new THREE.Vector3(20, 15, 0),new THREE.Vector3(15, 0, 20),new THREE.Vector3(5, 15, -5),new THREE.Vector3(10, 0, -10)])// 创建曲线几何 const geometry new THREE.BufferGeometry().setFromPoints(curve.getPoints(500))// 创建曲线材质 const material new THREE.LineBasicMaterial({ color: 0xffffff })// 创建曲线 const curveMesh new THREE.Line(geometry, material)// 添加曲线到场景 scene.add(curveMesh)let car nullconst loader new GLTFLoader()loader.setDRACOLoader(new DRACOLoader().setDecoderPath(FILE_HOST js/three/draco/))loader.load(HOST /files/model/car.glb,gltf {car gltf.scenescene.add(car) // 定义时间 let t 0car.render () {t 0.0004const point curve.getPointAt(t % 1) // 获取当前点car.position.set(point.x, point.y, point.z) // 设置位置car.lookAt(curve.getPointAt((t 0.01) % 1)) // 朝向下一个点}},(xhr) { },(e) { })animate()function animate() {requestAnimationFrame(animate)car?.render()renderer.render(scene, camera)}完整源码GitHub小结本文提供曲线动画完整 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
Three.js 曲线动画教程
曲线动画 ·Curve Animate· ▶ 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-examples400个案例代码:网盘链接你将学到什么OrbitControls 相机轨道交互CatmullRomCurve3 样条曲线路径glTF/Draco 模型加载与优化BufferGeometry 自定义顶点/索引数据requestAnimationFrame渲染循环与resize自适应效果说明本案例演示曲线动画效果基于 WebGL 实现「曲线动画」可视化效果附完整可运行源码核心用到 OrbitControls、CatmullRomCurve3、glTF/Draco。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Scene / Camera / WebGLRenderer构成最小渲染闭环大场景可开logarithmicDepthBuffer缓解 Z-fighting。OrbitControls提供轨道旋转/缩放开启enableDamping后需在 animate 中controls.update()。曲线类getPoints(n)将贝塞尔/样条离散为路径点再写入 BufferGeometry 驱动飞线或路径动画。实现步骤搭建 Scene、PerspectiveCamera、WebGLRenderer挂载 canvas 并处理resize异步加载模型 / 3D Tiles / GeoJSON 等资源并加入 scene 或 entities用曲线离散点构建 BufferGeometry写入自定义 attribute 驱动动画创建 OrbitControls及 Raycaster 等交互控件若源码包含在requestAnimationFrame循环中更新状态并 renderCesium 为viewer.render或自动渲染代码要点import * as THREE from threeimport { OrbitControls } from three/examples/jsm/controls/OrbitControls.js import { GLTFLoader } from three/examples/jsm/loaders/GLTFLoader.js import { DRACOLoader } from three/examples/jsm/loaders/DRACOLoader.jsconst box document.getElementById(box)const scene new THREE.Scene()const camera new THREE.PerspectiveCamera(75, box.clientWidth / box.clientHeight, 0.1, 1000)camera.position.set(30, 30, 30)const renderer new THREE.WebGLRenderer({ antialias: true, alpha: true, logarithmicDepthBuffer: true })renderer.setSize(box.clientWidth, box.clientHeight)box.appendChild(renderer.domElement)new OrbitControls(camera, renderer.domElement)window.onresize () {renderer.setSize(box.clientWidth, box.clientHeight)camera.aspect box.clientWidth / box.clientHeightcamera.updateProjectionMatrix()}scene.add(new THREE.AmbientLight(0xffffff, 4))scene.add(new THREE.AxesHelper(1000))// 创建一个曲线 const curve new THREE.CatmullRomCurve3([new THREE.Vector3(0, 0, 0),new THREE.Vector3(20, 15, 0),new THREE.Vector3(15, 0, 20),new THREE.Vector3(5, 15, -5),new THREE.Vector3(10, 0, -10)])// 创建曲线几何 const geometry new THREE.BufferGeometry().setFromPoints(curve.getPoints(500))// 创建曲线材质 const material new THREE.LineBasicMaterial({ color: 0xffffff })// 创建曲线 const curveMesh new THREE.Line(geometry, material)// 添加曲线到场景 scene.add(curveMesh)let car nullconst loader new GLTFLoader()loader.setDRACOLoader(new DRACOLoader().setDecoderPath(FILE_HOST js/three/draco/))loader.load(HOST /files/model/car.glb,gltf {car gltf.scenescene.add(car) // 定义时间 let t 0car.render () {t 0.0004const point curve.getPointAt(t % 1) // 获取当前点car.position.set(point.x, point.y, point.z) // 设置位置car.lookAt(curve.getPointAt((t 0.01) % 1)) // 朝向下一个点}},(xhr) { },(e) { })animate()function animate() {requestAnimationFrame(animate)car?.render()renderer.render(scene, camera)}完整源码GitHub小结本文提供曲线动画完整 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
