var viewer = new Cesium.Viewer('cesiumContainer', {
      animation: false,       //是否显示动画控件
      homeButton: true,       //是否显示home键
      //geocoder:false,         //是否显示地名查找控件        如果设置为true，则无法查询
      baseLayerPicker: false, //是否显示图层选择控件
      timeline: false,        //是否显示时间线控件
      fullscreenButton: true, //是否全屏显示
      scene3DOnly: true,     //如果设置为true，则所有几何图形以3D模式绘制以节约GPU资源
      infoBox: true,         //是否显示点击要素之后显示的信息
      sceneModePicker: false,  //是否显示投影方式控件  三维/二维
      navigationInstructionsInitiallyVisible: false,
      navigationHelpButton: false,     //是否显示帮助信息控件
      selectionIndicator: false,        //是否显示指示器组件
      //  //加载谷歌卫星影像
      //  imageryProvider:new Cesium.ArcGisMapServerImageryProvider({
      //       url: 'https://server.arcgisonline.com/arcgis/rest/services/World_Terrain_Base/MapServer'
      //   }),
      //  terrainProvider : new Cesium.CesiumTerrainProvider({url: 'https://www.supermapol.com/iserver/services/3D-stk_terrain/rest/realspace/datas/info/data/path/'}),

      // imageryProvider: new Cesium.WebMapTileServiceImageryProvider({
      //           url: "http://t0.tianditu.gov.cn/img_w/wmts?tk=7b435c61bff7f77eb49206e10d6397bd",
      //           layer: 'img',
      //           style: 'default',
      //           tileMatrixSetID: 'w',
      //           format: 'tiles',
      //           maximumLevel: 18
      //       }),
      // terrainProvider : Cesium.createWorldTerrain({
      //   requestVertexNormals: true
      // })

    });
    scene = viewer.scene;
    var handler = new Cesium.ScreenSpaceEventHandler(scene.canvas);
    handler.setInputAction(function (evt) {
      var scene = viewer.scene;
      if (scene.mode !== Cesium.SceneMode.MORPHING) {
        var pickedObject = scene.pick(evt.position);
        if (scene.pickPositionSupported && Cesium.defined(pickedObject)) {
          var cartesian = viewer.scene.pickPosition(evt.position);
          if (Cesium.defined(cartesian)) {
            var cartographic = Cesium.Cartographic.fromCartesian(cartesian);
            var lng = Cesium.Math.toDegrees(cartographic.longitude);
            var lat = Cesium.Math.toDegrees(cartographic.latitude);
            var height = cartographic.height;//模型高度
            mapPosition = { x: lng, y: lat, z: height };
            console.log(mapPosition);
          }
        }
      }
    }, Cesium.ScreenSpaceEventType.LEFT_CLICK);