在three.js中用灯光跟随鼠标位置

// 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);

// 创建平行光
const light = new THREE.DirectionalLight(0xffffff, 1);
scene.add(light);

// 监听鼠标移动事件
document.addEventListener('mousemove', onMouseMove, false);

function onMouseMove(event) {
  // 获取鼠标的位置
  const mouseX = (event.clientX / window.innerWidth) * 2 - 1;
  const mouseY = -(event.clientY / window.innerHeight) * 2 + 1;

  // 更新平行光的位置
  light.position.x = mouseX;
  light.position.y = mouseY;
}

// 渲染循环
function animate() {
  requestAnimationFrame(animate);

  // 更新场景和相机
  renderer.render(scene, camera);
}
animate();