圆锥网格 · Cone Mesh · ▶ 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
- EffectComposer 多 Pass 后期处理管线
- UnrealBloomPass 辉光 Bloom 效果
- 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 圆锥网格 效果:原场景渲染后经 EffectComposer 叠加 Bloom/模糊等全屏后期;核心用到 EffectComposer、UnrealBloomPass、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
- Scene / Camera / WebGLRenderer 构成最小渲染闭环;大场景可开
logarithmicDepthBuffer缓解 Z-fighting。 - EffectComposer 以多 Pass 链式渲染:RenderPass → 特效 Pass → 输出屏幕,替代直接
renderer.render。 - OrbitControls 提供轨道旋转/缩放;开启
enableDamping后需在 animate 中controls.update()。
实现步骤
- 搭建 Scene、PerspectiveCamera、WebGLRenderer,挂载 canvas 并处理
resize - 组装 EffectComposer Pass 链,在 animate 中调用
composer.render() - 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 { UnrealBloomPass } from 'three/examples/jsm/postprocessing/UnrealBloomPass.js';
import { EffectComposer } from 'three/examples/jsm/postprocessing/EffectComposer.js';
import { RenderPass } from 'three/examples/jsm/postprocessing/RenderPass.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(0, 0, 20)
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)
const effectComposer = new EffectComposer(renderer);
const renderPass = new RenderPass(scene, camera);
effectComposer.addPass(renderPass);
const bloomPass = new UnrealBloomPass(new THREE.Vector2(box.clientWidth, box.clientHeight), 0.8, 0.4, 0.0);
effectComposer.addPass(bloomPass);
const geometry = new THREE.ConeGeometry(3.5, 5.5, 4);
const textureLoader = new THREE.TextureLoader();
const texture = textureLoader.load("https://g2657.github.io/examples-server/smartCity/demo/image/gradual_change_y_02.png");
const material = new THREE.MeshBasicMaterial({
map: texture
})
const cone = new THREE.Mesh(geometry, material);
cone.rotation.x = -Math.PI;
scene.add(cone);
let d = 0.03
animate()
function animate() {
if (cone.position.y > 3 || cone.position.y < 0) d = -d
cone.position.y += d;
cone.rotation.y += Math.PI / 100;
requestAnimationFrame(animate)
effectComposer.render()
}
window.onresize = () => {
renderer.setSize(box.clientWidth, box.clientHeight)
camera.aspect = box.clientWidth / box.clientHeight
camera.updateProjectionMatrix()
`}
`
完整源码:GitHub
小结
- 本文提供 圆锥网格 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