vue 使用three.js 实现3D渲染

渲染效果如下：

实现步骤：

1. 引入three.js相关依赖: npm install three
2. 准备模型文件：改项目中使用的模型类型为fbx('需要模型关注“极光游戏工作室”公众号下载)
3. 注意事项：项目中引入模型路径必须使用绝对路径，否则找不到；
4. 将模型文件放入public文件下的model文件下
   5
   实现代码：

<template>
  <div id="model"></div>
</template>
<script>
import * as THREE from "three";
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls";
import { FBXLoader } from "three/examples/jsm/loaders/FBXLoader";
export default {
  data() {
    return {
      camera: null,
      scene: null,
      renderer: null,
      controls: null,
      modelPath: "/model/Reaction.fbx"
    };
  },
  methods: {
    init() {
      let self = this;
      let container = document.getElementById("model");
      let mouse = new THREE.Vector2();
      self.camera = new THREE.PerspectiveCamera(
        45,
        container.clientWidth / container.clientHeight,
        0.01,
        2000
      );
      self.camera.position.set(100, 200, 300);
      self.scene = new THREE.Scene();
      // ground
      var mesh = new THREE.Mesh(
        new THREE.PlaneBufferGeometry(2000, 2000),
        new THREE.MeshPhongMaterial({ color: 0x999999, depthWrite: false })
      );
      mesh.rotation.x = -Math.PI / 2;
      mesh.receiveShadow = true;
      self.scene.add(mesh);

      var grid = new THREE.GridHelper(2000, 20, 0x000000, 0x000000);
      grid.material.opacity = 0.2;
      grid.material.transparent = true;
      self.scene.add(grid);

      self.renderer = new THREE.WebGLRenderer({
        antialias: true,
        alpha: true,
        precision: "highp"
      });
      self.renderer.setSize(container.clientWidth, container.clientHeight);
      container.appendChild(self.renderer.domElement)

      self.controls = new OrbitControls(self.camera, self.renderer.domElement);
      self.controls.target.set(0, 100, 0);
      self.controls.update();
      var light = new THREE.HemisphereLight(0xffffff, 0x444444);
      light.position.set(0, 200, 0);
      self.scene.add(light);

      light = new THREE.DirectionalLight(0xffffff);
      light.position.set(0, 200, 100);
      light.castShadow = true;
      light.shadow.camera.top = 180;
      light.shadow.camera.bottom = -100;
      light.shadow.camera.left = -120;
      light.shadow.camera.right = 120;
      self.scene.add(light);
      let fbxLoader = new FBXLoader();
      fbxLoader.load(self.modelPath, function (object) {
        self.scene.add(object);

      });
    },
    animate() {
      requestAnimationFrame(this.animate);
      this.renderer.clear();
      this.renderer.render(this.scene, this.camera);
      this.renderer.clearDepth();
    }
  },
  mounted() {
    this.init();
    this.animate();
  }
};
</script>
<style  scoped>
#model {
  width: 100vw;
  height: 100vh;
  background-image: radial-gradient(red, yellow, green);
}
</style>