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Three.js 圆锥网格教程

news 2026/7/15 11:26:26

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()}