text: // import * as mars3d from "mars3d"
  
  var map // mars3d.Map三维地图对象
  
  // 需要覆盖config.json中地图属性参数（当前示例框架中自动处理合并）
  var mapOptions = {
    scene: {
      center: { lat: 17.372658, lng: 109.327197, alt: 3459173, heading: 12, pitch: -69 },
      fxaa: true
    },
    terrain: false,
    basemaps: [
      {
        name: "蓝色底图",
        icon: "//data.mars3d.cn/file/img/world/blue.jpg",
        type: "image",
        url: "//data.mars3d.cn/file/img/world/blue.jpg",
        show: true
      }
    ],
    layers: []
  }
  
  /**
   * 初始化地图业务，生命周期钩子函数（必须）
   * 框架在地图初始化完成后自动调用该函数
   * @param {mars3d.Map} mapInstance 地图对象
   * @returns {void} 无
   */
  function onMounted(mapInstance) {
    map = mapInstance // 记录map
  
    // 一线以上城市地理位置
    const arrStart = [
      { name: "北京", position: [116.395645038, 39.9299857781] },
      { name: "上海", position: [121.487899486, 31.24916171] },
      { name: "广州", position: [113.307649675, 23.1200491021] },
      { name: "深圳", position: [114.025973657, 22.5460535462] },
      { name: "成都", position: [104.067923463, 30.6799428454] },
      { name: "杭州", position: [120.219375416, 30.2592444615] },
      { name: "重庆", position: [106.530635013, 29.5446061089] },
      { name: "苏州", position: [113.64964385, 34.7566100641] },
      { name: "武汉", position: [114.316200103, 30.5810841269] },
      { name: "南京", position: [118.778074408, 32.0572355018] },
      { name: "天津", position: [117.210813092, 39.1439299033] },
      { name: "郑州", position: [113.64964385, 34.7566100641] },
      { name: "长沙", position: [112.979352788, 28.2134782309] },
      { name: "东莞", position: [113.763433991, 23.0430238154] },
      { name: "佛山", position: [113.134025635, 23.0350948405] },
      { name: "宁波", position: [121.579005973, 29.8852589659] },
      { name: "青岛", position: [120.384428184, 36.1052149013] },
      { name: "沈阳", position: [123.432790922, 41.8086447835] },
      { name: "深圳", position: [114.025973657, 22.5460535462] },
      { name: "乌鲁木齐", position: [87.613307, 43.824787] }
    ]
  
    //  连接点地理位置
    const arrEnd = [
      { name: "西安", position: [108.953098279, 34.2777998978] },
      { name: "南京", position: [118.778074408, 32.0572355018] },
      { name: "武汉", position: [114.316200103, 30.5810841269] }
    ]
  
    // 创建矢量数据
    const graphicLayer = new mars3d.layer.GraphicLayer()
    map.addLayer(graphicLayer)
  
    for (let i = 0; i < arrStart.length; i++) {
      const item = arrStart[i]
      const position = item.position
  
      // 城市名字
      const graphic = new mars3d.graphic.DivGraphic({
        position: position,
        style: {
          html: `<div class ="textName">${item.name}</div>`,
          horizontalOrigin: Cesium.HorizontalOrigin.CENTER,
          verticalOrigin: Cesium.VerticalOrigin.CENTER
        }
      })
      graphicLayer.addGraphic(graphic)
    }
  
    for (let i = 0; i < arrEnd.length; i++) {
      const item = arrEnd[i]
      const endPoint = item.position
  
      // 城市名字
      const graphic = new mars3d.graphic.DivGraphic({
        position: endPoint,
        style: {
          html: `<div class ="textName">${item.name}</div>`,
          horizontalOrigin: Cesium.HorizontalOrigin.CENTER,
          verticalOrigin: Cesium.VerticalOrigin.CENTER
        }
      })
      graphicLayer.addGraphic(graphic)
  
      for (let j = 0; j < arrStart.length; j++) {
        const item = arrStart[j]
        const startPoint = item.position
  
        // 连线
        const line = new mars3d.graphic.PolylinePrimitive({
          positions: [startPoint, endPoint],
          style: {
            width: 2,
            material: mars3d.MaterialUtil.createMaterial(mars3d.MaterialType.LineFlow, {
              color: "#3af2f3",
              image: "img/textures/line-pulse.png",
              speed: 1
            })
          }
        })
        graphicLayer.addGraphic(line)
      }
    }
  }
  
  /**
   * 释放当前地图业务的生命周期函数
   * @returns {void} 无
   */
  function onUnmounted() {
    map = null
  }
  