three.js画曲线

// 引入 Three.js 库
import * as THREE from 'three';

// 创建场景、相机和渲染器
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
const renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

// 定义贝塞尔曲线的控制点
const points = [
    new THREE.Vector3(-10, 0, 0),
    new THREE.Vector3(-5, 5, 0),
    new THREE.Vector3(5, -5, 0),
    new THREE.Vector3(10, 0, 0)
];

// 创建曲线对象
const curve = new THREE.CubicBezierCurve3(points[0], points[1], points[2], points[3]);

// 根据曲线生成几何体
const geometry = new THREE.BufferGeometry().setFromPoints(curve.getPoints(50));
const material = new THREE.LineBasicMaterial({ color: 0x00ff00 });
const curveObject = new THREE.Line(geometry, material);

// 将曲线添加到场景中
scene.add(curveObject);

camera.position.z = 20;

// 渲染循环
function animate() {
    requestAnimationFrame(animate);
    renderer.render(scene, camera);
}
animate();