three.js 画弧线

// 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);

// 创建弧线几何体
const arcGeometry = new THREE.ArcCurve(0, 0, 5, 0, Math.PI * 0.5).getPoints(50);

// 将点转换为 BufferGeometry
const points = new Float32Array(arcGeometry.flatMap(p => [p.x, p.y, p.z]));
const geometry = new THREE.BufferGeometry().setFromPoints(points);

// 创建材质并应用到几何体上
const material = new THREE.LineBasicMaterial({ color: 0xff0000 });
const arcLine = new THREE.Line(geometry, material);

// 将弧线添加到场景中
scene.add(arcLine);

// 设置相机位置
camera.position.z = 10;

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