如何使用THREE.JS从xyz中的一组点创建自定义形状？

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

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

// 创建几何体
const geometry = new THREE.BufferGeometry();

// 设置几何体的顶点
const vertices = [
  new THREE.Vector3(-1, -1, 0),
  new THREE.Vector3(1, -1, 0),
  new THREE.Vector3(0, 1, 0)
];
geometry.setFromPoints(vertices);

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

// 创建网格
const mesh = new THREE.Mesh(geometry, material);

// 将网格添加到场景中
scene.add(mesh);

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