code

在这里插入代码片
import { ref, onMounted } from "vue"

import * as THREE from "three";
import Earth from "./textures/Earth.png"
import EarthSpec from "./textures/EarthSpec.png"
import EarthNormal from "./textures/EarthNormal.png"
import {
  OrbitControls
} from 'three/examples/jsm/controls/OrbitControls.js'
export const useHandler = () => {

  let mapCon: any = ref(null);
  let scene: any;

  let camera: any;
  let renderer: any;
  let earth: any;
  let step = 0;
  const init = () => {
    scene = new THREE.Scene();
    scene.background = new THREE.Color(0x515870);
    camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);//新建摄像机
    renderer = new THREE.WebGLRenderer();//新建渲染器
    renderer.setSize(window.innerWidth, window.innerHeight);//设置窗口大小

    mapCon.value.appendChild(renderer.domElement);

    renderer.setClearColor(0x000000, 1.0);//设置背景颜色
    renderer.shadowMapEnabled = true;
    // renderer = webGLRenderer;
    camera.position.x = 30;//设置摄像机的x坐标
    camera.position.y = 0;//设置摄像机的y坐标
    camera.position.z = 30;//设置摄像机的z坐标
    camera.lookAt(new THREE.Vector3(0, 0, 0));//设置摄像机焦点

    let ambientLight = new THREE.AmbientLight(0xffffff);//新建环境光
    scene.add(ambientLight);//将环境光添加到场景中
    let light = new THREE.SpotLight();//新建聚光灯
    light.position.set(0, 0, 30);//设置光源位置
    light.intensity = 0.8;//设置光照强度
    scene.add(light);//将聚光灯添加到场景中
    createEarth();
    render();
    addControls();

  }
  const createEarth = () => {//创建地球模型的方法
    let loader = new THREE.TextureLoader();
    // let texture = loader.load('/images/floor.jpg');
    let Sphere = new THREE.SphereGeometry(10, 40, 40);//新建球体的几何对象
    let planetTexture = loader.load(Earth);//读取地球的纹理贴图
    let specularTexture = loader.load(EarthSpec);//读取高光贴图
    let normalTexture = loader.load(EarthNormal);//读取法线贴图
    let planetMaterial = new THREE.MeshPhongMaterial();//新建phong材质
    planetMaterial.specularMap = specularTexture;//设置高光贴图
    planetMaterial.specular = new THREE.Color(0xffffff);//设置高光部分的颜色
    planetMaterial.shininess = 40;//高光部分的亮度及范围
    planetMaterial.normalMap = normalTexture;//设置法线贴图
    planetMaterial.map = planetTexture;//设置纹理贴图
    let sphere = new THREE.Mesh(Sphere, planetMaterial);//新建网格对象
    scene.add(sphere);//将网格对象添加到场景中
    earth = sphere;
  }
  const render = () => {
    // earth.rotation.y = step += 0.01;
    requestAnimationFrame(render);//请求绘制下一帧
    renderer.render(scene, camera);//进行绘制

  }
  //添加鼠标控制
  const addControls = () => {

    let controls = new OrbitControls(camera, renderer.domElement);//添加鼠标旋转放大的控制
    // controls.addEventListener('change', renderScene:ant); //添加监听
    // controls.minDistance = 30;//设置拉伸的最小距离
    controls.maxDistance = 1000;//设置拉伸的最大距离
    controls.enablePan = true;//是否可以平移
    controls.enableZoom = true;//设置缩放比例
    controls.maxPolarAngle = Math.PI * 4 / 9;//控制角度
   

    controls.update();
  }
  onMounted(() => {
    init();
  })

  return {
    mapCon
  }
}

效果

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