建筑线条 · Building Line · ▶ 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
- glTF/Draco 模型加载与优化
- EdgesGeometry 模型边线提取
requestAnimationFrame渲染循环与resize自适应
效果说明
本案例演示 建筑线条 效果:基于 WebGL 实现「建筑线条」可视化效果,附完整可运行源码;核心用到 OrbitControls、glTF/Draco、EdgesGeometry。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()。 - 阅读下方完整源码时,建议从
init/load/animate三条主线入手,再深入 shader 与工具函数。
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
- 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 render(Cesium 为viewer.render或自动渲染)
代码要点
import * as THREE from 'three'
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js'
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js'
import { LineSegments2 } from 'three/examples/jsm/lines/LineSegments2.js';
import { LineMaterial } from 'three/examples/jsm/lines/LineMaterial.js';
import { LineSegmentsGeometry } from 'three/examples/jsm/lines/LineSegmentsGeometry.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(1, 1, 1)
const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true })
renderer.setPixelRatio(window.devicePixelRatio * 1.3)
renderer.setSize(box.clientWidth, box.clientHeight)
box.appendChild(renderer.domElement)
new OrbitControls(camera, renderer.domElement)
scene.add(new THREE.AxesHelper(100))
animate()
function animate() {
requestAnimationFrame(animate)
renderer.render(scene, camera)
}
window.onresize = () => {
renderer.setSize(box.clientWidth, box.clientHeight)
camera.aspect = box.clientWidth / box.clientHeight
camera.updateProjectionMatrix()
}
const urls = [0, 1, 2, 3, 4, 5].map(k => (FILE_HOST + 'files/sky/skyBox0/' + (k + 1) + '.png'));
const textureCube = new THREE.CubeTextureLoader().load(urls);
new GLTFLoader().load(FILE_HOST + 'models/whitebuild.glb', (gltf) => {
const model = gltf.scene
model.traverse((child) => {
if (child.isMesh) {
child.material.envMap = textureCube
const { geometry } = child
const edges = new THREE.EdgesGeometry(geometry)
let lineGeometry = new LineSegmentsGeometry().fromEdgesGeometry(edges)
const material = new LineMaterial({
color: 0xfcde8c,
linewidth: 2.5,
envMap: textureCube,
resolution: new THREE.Vector2(box.clientWidth, box.clientHeight)
})
const lines = new LineSegments2(lineGeometry, material)
lines.computeLineDistances()
lines.applyMatrix4(child.matrixWorld)
scene.add(lines)
}
})
`scene.add(model)
})
`
完整源码:GitHub
小结
- 本文提供 建筑线条 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