vue实现全景图

使用Three.js实现全景图

在Vue项目中集成Three.js可以高效实现全景图展示。需要安装Three.js依赖：

npm install three

创建全景图组件：

<template>
  <div ref="container" class="panorama-container"></div>
</template>

<script>
import * as THREE from 'three';

export default {
  mounted() {
    this.initScene();
    this.loadPanorama();
    window.addEventListener('resize', this.onWindowResize);
  },
  methods: {
    initScene() {
      this.scene = new THREE.Scene();
      this.camera = new THREE.PerspectiveCamera(75, window.innerWidth/window.innerHeight, 0.1, 1000);
      this.renderer = new THREE.WebGLRenderer();
      this.renderer.setSize(window.innerWidth, window.innerHeight);
      this.$refs.container.appendChild(this.renderer.domElement);
    },
    loadPanorama() {
      const textureLoader = new THREE.TextureLoader();
      textureLoader.load('panorama.jpg', texture => {
        const geometry = new THREE.SphereGeometry(500, 60, 40);
        geometry.scale(-1, 1, 1);
        const material = new THREE.MeshBasicMaterial({ map: texture });
        const sphere = new THREE.Mesh(geometry, material);
        this.scene.add(sphere);
        this.animate();
      });
    },
    animate() {
      requestAnimationFrame(this.animate);
      this.renderer.render(this.scene, this.camera);
    },
    onWindowResize() {
      this.camera.aspect = window.innerWidth / window.innerHeight;
      this.camera.updateProjectionMatrix();
      this.renderer.setSize(window.innerWidth, window.innerHeight);
    }
  },
  beforeDestroy() {
    window.removeEventListener('resize', this.onWindowResize);
  }
}
</script>

<style>
.panorama-container {
  width: 100%;
  height: 100vh;
}
</style>

使用Photo Sphere Viewer库

Photo Sphere Viewer是专门用于全景图展示的库，使用更简单：

安装依赖：

npm install photo-sphere-viewer

组件实现：

<template>
  <div ref="viewer" class="panorama-viewer"></div>
</template>

<script>
import { Viewer } from 'photo-sphere-viewer';
import 'photo-sphere-viewer/dist/photo-sphere-viewer.css';

export default {
  props: {
    src: {
      type: String,
      required: true
    }
  },
  mounted() {
    this.viewer = new Viewer({
      container: this.$refs.viewer,
      panorama: this.src,
      size: {
        width: '100%',
        height: '100vh'
      }
    });
  },
  beforeDestroy() {
    if (this.viewer) {
      this.viewer.destroy();
    }
  }
}
</script>

移动端适配方案

针对移动设备需要添加陀螺仪控制：

import DeviceOrientationControls from 'three-device-orientation';

// 在initScene方法中添加
this.controls = new DeviceOrientationControls(this.camera);
this.controls.connect();

// 在animate方法中更新
this.controls.update();

性能优化技巧

使用低分辨率预览图快速加载：

textureLoader.load('panorama-lowres.jpg', lowResTexture => {
  const material = new THREE.MeshBasicMaterial({ map: lowResTexture });

  // 加载高清图后替换
  textureLoader.load('panorama-hires.jpg', hiResTexture => {
    material.map = hiResTexture;
    material.needsUpdate = true;
  });
});

添加加载进度指示器：

const manager = new THREE.LoadingManager();
manager.onProgress = (url, loaded, total) => {
  console.log(`加载进度: ${loaded}/${total}`);
};

const textureLoader = new THREE.TextureLoader(manager);

热点标记实现

在全景图中添加交互热点：

const hotspotGeometry = new THREE.SphereGeometry(1, 16, 16);
const hotspotMaterial = new THREE.MeshBasicMaterial({ color: 0xff0000 });
const hotspot = new THREE.Mesh(hotspotGeometry, hotspotMaterial);
hotspot.position.set(0, 0, -10);
this.scene.add(hotspot);

// 添加射线检测
this.raycaster = new THREE.Raycaster();
this.mouse = new THREE.Vector2();

window.addEventListener('click', event => {
  this.mouse.x = (event.clientX / window.innerWidth) * 2 - 1;
  this.mouse.y = -(event.clientY / window.innerHeight) * 2 + 1;

  this.raycaster.setFromCamera(this.mouse, this.camera);
  const intersects = this.raycaster.intersectObjects([hotspot]);

  if (intersects.length > 0) {
    console.log('热点被点击');
  }
});