加载3dtiles ·Load Tiles· ▶ 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glTF/Draco 模型加载与优化3D Tiles 流式 LOD 场景requestAnimationFrame渲染循环与resize自适应效果说明本案例演示加载3dtiles效果基于 WebGL 实现「加载3dtiles」可视化效果附完整可运行源码核心用到 OrbitControls、glTF/Draco、3D。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Loader异步加载模型glTF 返回gltf.scene加载后注意scale与坐标系。Draco 需配置DRACOLoader。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 OrbitControlsLoader 异步加载模型/纹理资源rAF 循环中 update 并 render代码要点import * as THREE from threeimport { OrbitControls } from three/examples/jsm/controls/OrbitControls.js import { TilesRenderer } from 3d-tiles-rendererconst 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(0, 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)scene.add(new THREE.AxesHelper(1000))// 加载3d tiles const tilesRenderer new TilesRenderer(FILE_HOST 3dtiles/test/tileset.json)tilesRenderer.setCamera(camera)tilesRenderer.setResolutionFromRenderer(camera, renderer)const model new THREE.Group().add(tilesRenderer.group)scene.add(model)const box3 new THREE.Box3()tilesRenderer.addEventListener(load-tile-set, () {if (tilesRenderer.getBoundingBox(box3)) {box3.getCenter(tilesRenderer.group.position)tilesRenderer.group.position.multiplyScalar(-1)}})animate()function animate() {requestAnimationFrame(animate)tilesRenderer.update()renderer.render(scene, camera)}// tilesRenderer.errorTarget 1 // 设置错误阈值默认值为0.5范围0~1值越小越严格// https://blog.csdn.net/m0_73348873/article/details/151783069/* function initTiles() { tilesRenderer new TilesRenderer(3dtiles路径/tileset.json); const gltfLoader new GLTFLoader(); // Draco const dracoLoader new DRACOLoader(); dracoLoader.setDecoderPath(https://unpkg.com/three0.180.0/examples/jsm/libs/draco/); gltfLoader.setDRACOLoader(dracoLoader); // KTX2 const ktx2Loader new KTX2Loader(); ktx2Loader.setTranscoderPath(https://unpkg.com/three0.180.0/examples/jsm/libs/basis/); ktx2Loader.detectSupport(renderer); gltfLoader.setKTX2Loader(ktx2Loader); tilesRenderer.manager.addHandler(/\.(gltf|glb)$/g, gltfLoader); tilesRenderer.setCamera(camera); tilesRenderer.setResolutionFromRenderer(camera, renderer); // 更新矩阵并设置相机位置 let loadedTileSetHandled false; tilesRenderer.addEventListener(load-tile-set, () { if (loadedTileSetHandled) return; loadedTileSetHandled true; const sphere new THREE.Sphere(); tilesRenderer.getBoundingSphere(sphere); const center sphere.center.clone(); // 获取包围球中心 const radius sphere.radius; // 获取包围球半径 controls.target.copy(center); // 把控制器目标设为包围球中心 const offset new THREE.Vector3(radius * 2, radius, 0); // 给相机一个偏移 camera.position.copy(center).add(offset); // 设置相机位置 const m (tilesRenderer as any).root.transform; // 获取原始矩阵 const rotationMat3 new THREE.Matrix3().set(m[0], m[1], m[2], m[4], m[5], m[6], m[8], m[9], m[10]); // 取出旋转部分 rotationMat3.transpose(); // 逆旋转 const rotationMat4 new THREE.Matrix4().setFromMatrix3(rotationMat3); // 转回Matrix4以便应用 const rotX90 new THREE.Matrix4().makeRotationX((90 * Math.PI) / 180); // x轴旋转90度矩阵 rotationMat4.multiply(rotX90); // 合并矩阵由z轴向上坐标系 转为 y轴向上坐标系 const translationMatrix1 new THREE.Matrix4().makeTranslation(center.x, center.y, center.z); // T(center) const translationMatrix2 new THREE.Matrix4().makeTranslation(-center.x, -center.y, -center.z); // T(-center) const finalMatrix new THREE.Matrix4().multiplyMatrices(translationMatrix1, rotationMat4).multiply(translationMatrix2); // 最终矩阵 T(center)R⁻¹T(-center) tilesRenderer.group.matrix.copy(finalMatrix); // 设置矩阵 tilesRenderer.group.matrixAutoUpdate false; // 禁止自动更新矩阵 tilesRenderer.group.updateMatrixWorld(true); // 更新矩阵 }); scene.add(tilesRenderer.group); // 添加到场景 } */完整源码GitHub小结本文提供加载3dtiles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