如何在three.js中绘制凸透镜的形状

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

// 创建场景
const scene = new THREE.Scene();

// 创建相机
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.z = 5;

// 创建渲染器
const renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

// 创建凸透镜的形状
const shape = new THREE.Shape();
shape.moveTo(0, 0);
shape.quadraticCurveTo(1, 1, 0, 2);
shape.quadraticCurveTo(-1, 1, 0, 0);

// 创建材质
const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 });

// 创建网格对象
const lens = new THREE.Mesh(new THREE.ShapeGeometry(shape), material);

// 将网格对象添加到场景中
scene.add(lens);

// 渲染场景
function animate() {
  requestAnimationFrame(animate);
  lens.rotation.x += 0.01;
  lens.rotation.y += 0.01;
  renderer.render(scene, camera);
}
animate();