<template>  <div class="container" ref="container">
  </div></template>
<script >import * as THREE from "three";import { ref } from "vue";//添加一个轨道控制器import { OrbitControls} from "three/examples/jsm/controls/OrbitControls";//导入动画库import gsap from "gsap";//导入dat.guiimport * as dat from "dat.gui";
export default {  name: 'App',  data() {    return {      renderer: null,      scene: null,      camera: null,      cube: null,      clock: null,      animate1: null,      controls: null,      gui: null    }  },  mounted() {    //1.创建场景
    const scene = new THREE.Scene();
    //2.创建相机(透视相机)    /**     * 构造器     * PerspectiveCamera( fov : Number, aspect : Number, near : Number, far : Number )     * fov — 摄像机视锥体垂直视野角度     * aspect — 摄像机视锥体长宽比     * near — 摄像机视锥体近端面     * far — 摄像机视锥体远端面     */    const camera = new THREE.PerspectiveCamera(    75,    window.innerWidth / window.innerHeight,    0.1,    1000    );    //设置相机位置:x,y,z轴位置    camera.position.set(0,0,10);    //添加相机到场景中    scene.add(camera);    this.scene=scene;this.camera=camera;
    //3.添加物体      //创建几何体     // const cubeGeometry = new THREE.BoxGeometry(1,1,1);     for(let i=0;i<50;i++){       //每一个三角形需要3个顶点，每个顶点需要3个值       const geometry = new THREE.BufferGeometry();       const positionArray =new Float32Array(9);       for(let j=0;j<9;j++){         positionArray[j] = Math.random() * 10-5;       }       //设置顶点       geometry.setAttribute(          'position',new THREE.BufferAttribute(positionArray,3));       let color = new THREE.Color(Math.random(),Math.random(),Math.random());       //创建材质       const Material = new THREE.MeshBasicMaterial({color: color,transparent:true,opacity:0.5});       //根据几何体和材质创建物体       // const cube = new THREE.Mesh(cubeGeometry,cubeMaterial);       const mesh = new THREE.Mesh(geometry,Material);       console.log(mesh);       scene.add(mesh);     }
     //创建6个顶点，3个点构造一个三角形，6个点构成2个三角形，2个三角形就是一个矩形  /*   const vertices =new  Float32Array([       -1.0,-1.0,1.0,       1.0,-1.0,1.0,       1.0,1.0,1.0,
       1.0,1.0,1.0,       -1.0,1.0,1.0,       -1.0,-1.0,1.0
     ]); */



      //将几何体添加到场景中

    //4.初始化渲染器    const renderer = new THREE.WebGLRenderer();      //设置渲染器的尺寸大小      renderer.setSize(window.innerWidth,window.innerHeight);    this.renderer=renderer;      //将webgl渲染的canvas内容添加到div      //document.body.append(renderer.domElement);    this.$refs['container'].appendChild(renderer.domElement);

      //使用渲染器，通过相机将场景渲染进来      renderer.render(scene,camera);
    //5.创建轨道控制器    const  controls = new OrbitControls(camera,renderer.domElement);    //设置控制器阻尼，让控制器更有真实效果，必须在动画循环调用update    controls.enableDamping = true;    this.controls=controls;
    //6.添加坐标轴辅助器      //size -- (可选的) 表示代表轴的线段长度. 默认为 1.    const axesHelper = new THREE.AxesHelper( 5 );    scene.add( axesHelper );
    //双击控制屏幕进入全屏、退出全屏    window.addEventListener("dblclick",()=>{      const fullScreenElement =document.fullscreenElement;
      if(!fullScreenElement){        //让画布对象全屏        this.renderer.domElement.requestFullscreen();      }else{        //退出全屏，使用document对象        document.exitFullscreen();      }
    })
    //监听画面变化，更新渲染画面    window.addEventListener("resize",()=>{      console.log("画面变化了");      //更新摄像头      this.camera.aspect = window.innerWidth /window.innerHeight;      //更新摄像机的投影矩阵      this.camera.updateProjectionMatrix();      //更新渲染器      this.renderer.setSize(window.innerWidth,window.innerHeight);      //设置渲染器的像素比      this.renderer.setPixelRatio(window.devicePixelRatio);
    })
    this.renders();  },  methods: {    renders(){

       this.controls.update();       this.renderer.render(this.scene,this.camera);    //  requestAnimationFrame(this.renders());//此行代码会出现threejs requestAnimationFrame 导致的call stack超出上限的问题       requestAnimationFrame(this.renders.bind(this));
    },
  }}</script>
<style>  *{    margin: 0;    padding: 0;  }.container{  height: 100vh;  width: 100vw;  background-color: #f0f0f0;}</style>