Three.js -创建半个环并为其设置动画

// 引入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);

// 创建半个环的几何体
const geometry = new THREE.RingGeometry(1, 2, 32, 8, 0, Math.PI);
const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 });
const halfRing = new THREE.Mesh(geometry, material);

// 将半个环添加到场景中
scene.add(halfRing);

// 设置动画函数
function animate() {
  requestAnimationFrame(animate);

  // 旋转半个环
  halfRing.rotation.x += 0.01;
  halfRing.rotation.y += 0.01;

  // 渲染场景和相机
  renderer.render(scene, camera);
}

// 调用动画函数
animate();