在React中观察Three.Js场景中的属性

import React, { Component } from 'react';
import * as THREE from 'three';

class ThreeScene extends Component {
  constructor(props) {
    super(props);
    this.state = {
      objectCount: 0,
      lightCount: 0,
    };
  }

  componentDidMount() {
    // 创建Three.Js场景
    const scene = new THREE.Scene();

    // 添加物体和光源到场景中
    // ...

    // 更新组件状态
    this.setState({
      objectCount: scene.children.length,
      lightCount: scene.lights.length,
    });
  }

  render() {
    const { objectCount, lightCount } = this.state;

    return (
      <div>
        <p>物体数量：{objectCount}</p>
        <p>光源数量：{lightCount}</p>
      </div>
    );
  }
}

export default ThreeScene;