当前位置：首页 > news >正文

Three.js 优雅永不过时教程

news 2026/7/1 19:06:54

优雅永不过时 ·Elegant Always· ▶ 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
BufferGeometry 自定义顶点/索引数据

效果说明

本案例演示优雅永不过时效果：基于 WebGL 实现「优雅永不过时」可视化效果，附完整可运行源码；核心用到 OrbitControls、BufferGeometry。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
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/addons/controls/OrbitControls.js"; import { OBJLoader } from 'three/examples/jsm/loaders/OBJLoader.js' import { MeshSurfaceSampler } from 'three/examples/jsm/math/MeshSurfaceSampler.js';
const scene = new THREE.Scene(); const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000); camera.position.set(0, 100, 300)
const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true }) renderer.setSize(window.innerWidth, window.innerHeight) document.body.appendChild(renderer.domElement)
const controls = new OrbitControls(camera, renderer.domElement) controls.autoRotate = true
let sampler = null
let path = null
new OBJLoader().load(
FILE_HOST + 'files/model/z2586300277.obj',
(obj) => {
sampler = new MeshSurfaceSampler(obj.children[0]).build();
path = new Path();
scene.add(path.line);
renderer.setAnimationLoop(render);
}
)
const tempPosition = new THREE.Vector3();
class Path { constructor() {
this.vertices = [];
this.geometry = new THREE.BufferGeometry();
this.material = new THREE.LineBasicMaterial({ color: 0xa58fb5, transparent: true, opacity: 0.5 });
this.line = new THREE.Line(this.geometry, this.material);
sampler.sample(tempPosition);
this.previousPoint = tempPosition.clone()
} update() {
let pointFound = false;
while (!pointFound) {
sampler.sample(tempPosition);
if (tempPosition.distanceTo(this.previousPoint) < 20) {
this.vertices.push(tempPosition.x, tempPosition.y, tempPosition.z);
this.previousPoint = tempPosition.clone();
pointFound = true;
}
}
this.geometry.setAttribute("position", new THREE.Float32BufferAttribute(this.vertices, 3));
}
}
function render() {
if (path.vertices.length < 50000) {
Array.from({ length: 10 }).forEach(() => path.update())
}
controls.update();
renderer.render(scene, camera);
}
window.onresize = () => {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);}