VUE2+THREE.JS 模型上方显示信息框/标签(CSS3DSprite精灵模型)

在Vue2项目中使用Three.js并在3D模型上方显示信息框，可以使用CSS3DSprite创建一个精灵模型来代表信息框。以下是一个简化的例子：

1. 安装Three.js:

npm install three

2. 在Vue组件中创建Three.js场景，并添加3D模型和CSS3DSprite信息框:

<template>
  <div ref="threeContainer"></div>
</template>
 
<script>
import * as THREE from 'three';
import { CSS3DRenderer, CSS3DSprite } from 'three/examples/jsm/renderers/CSS3DRenderer.js';
 
export default {
  name: 'ThreeModelWithLabel',
  mounted() {
    this.initThree();
    this.add3DModel();
    this.addLabelSprite();
    this.animate();
  },
  methods: {
    initThree() {
      const width = this.$refs.threeContainer.clientWidth;
      const height = this.$refs.threeContainer.clientHeight;
 
      this.scene = new THREE.Scene();
      this.camera = new THREE.PerspectiveCamera(75, width / height, 0.1, 1000);
      this.renderer = new THREE.WebGLRenderer();
      this.renderer.setSize(width, height);
      this.$refs.threeContainer.appendChild(this.renderer.domElement);
 
      this.cssRenderer = new CSS3DRenderer();
      this.cssRenderer.setSize(width, height);
      this.cssRenderer.domElement.style.position = 'absolute';
      this.cssRenderer.domElement.style.top = 0;
      this.$refs.threeContainer.appendChild(this.cssRenderer.domElement);
 
      this.camera.position.z = 5;
    },
    add3DModel() {
      const geometry = new THREE.BoxGeometry();
      const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 });
      this.cube = new THREE.Mesh(geometry, material);
      this.scene.add(this.cube);
    },
    addLabelSprite() {
      const sprite = new CSS3DSprite(document.createElement('div'));
      sprite.scale.set(0.2, 0.2, 0.2);
      sprite.position.set(0, 1, 0); // 在模型上方1单位处创建精灵模型
      sprite.material.transparent = true;
      this.scene.add(sprite);
      this.labelSprite = sprite;
    },
    animate() {
      requestAnimationFrame(this.animate);
      this.renderer.render(this.scene, this.camera);
      this.cssRenderer.render(this.scene, this.camera);
 
      // 示例：旋转模型和标签位置
      this.cube.rotation.x += 0.01;
      this.cube.rotation.y += 0.01;
      this.labelSprite.rotation.x += 0.01;
      this.labelSprite.rotat