three.js 包围盒

效果：

想要显示包围盒的样子；需要借助 Box3Helper 辅助显示；

<template>
  <div>
    <el-container>
      <el-main>
        <div class="box-card-left">
          <div id="threejs"></div>
        </div>
      </el-main>
    </el-container>
  </div>
</template>s
<script>
// 引入轨道控制器扩展库OrbitControls.js
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";
export default {
  data() {
    return {
      scene: null,
      camera: null,
      renderer: null,
      res1: null,
      res2: null,
    };
  },
  created() {},
  mounted() {
    this.name = this.$route.query.name;
    this.init();
  },
  methods: {
    goBack() {
      this.$router.go(-1);
    },
    init() {
      // 创建场景对象
      this.scene = new this.$three.Scene();
      // 创建辅助坐标轴对象
      const axesHelper = new this.$three.AxesHelper(100);
      this.scene.add(axesHelper);
      const geometry = new this.$three.SphereGeometry(15,32,32);
      const material = new this.$three.MeshBasicMaterial({color: 0xffaadd});
      const mesh = new this.$three.Mesh(geometry, material);
      this.scene.add(mesh);

      const box3 = new this.$three.Box3();
      box3.expandByObject(mesh);
      const box3_helper = new this.$three.Box3Helper(box3, 0xfaaaff);
      this.scene.add(box3_helper);

      this.camera = new this.$three.PerspectiveCamera(60,1,0.01,2000);
      this.camera.position.set(50,50,50);
      this.camera.lookAt(0,0,0);
      this.renderer = new this.$three.WebGLRenderer();
      this.renderer.setSize(1000,800);
      this.renderer.render(this.scene, this.camera);
      window.document.getElementById("threejs").appendChild(this.renderer.domElement);
      
      const controls = new OrbitControls(this.camera, this.renderer.domElement)
      controls.addEventListener("change", () => {
        this.renderer.render(this.scene, this.camera);
      })
    },
  },
};
</script>
<style lang="less" scoped>
.box-card-left {
  display: flex;
  align-items: flex-start;
  flex-direction: row;
  width: 100%;
  .box-right {
    img {
      width: 500px;
      user-select: none;
    }
  }
}
</style>