Cesium鼠标获取地形和模型上的点(包含高程值)

?这个是根据鼠标点击的是地形还是模型，动态识别获取对应目标上的经纬度和高程数据，window.mapViewer则是创建的Cesium地图对象；

 getPoint() {
      let _this = this;
      this.handler = new Cesium.ScreenSpaceEventHandler(
        window.mapViewer.scene.canvas
      );
      this.handler.setInputAction(function (clickEvent) {
        let mapPosition = {};
        let position;
        if (clickEvent.position) {
          position = clickEvent.position;
        } else {
          position = clickEvent.endPosition;
        }
        let pick = window.mapViewer.scene.pickPosition(position);
        // 获取模型对象
        let pickModel = window.mapViewer.scene.pick(position);
        // 如果点击的是模型
        if (pickModel && pick) {
          // 笛卡尔坐标系转为经纬度（弧度）坐标
          let cartographic = Cesium.Cartographic.fromCartesian(pick);
          // 再将经纬度（弧度）坐标转化为经纬度角度坐标
          let lat = Cesium.Math.toDegrees(cartographic.latitude);
          let lng = Cesium.Math.toDegrees(cartographic.longitude);
          mapPosition = {
            x: lng,
            y: lat,
            z: cartographic.height + 3,
            description: "模型坐标",
          };
        } else {
          let ray = window.mapViewer.camera.getPickRay(position);
          let cartesian = window.mapViewer.scene.globe.pick(
            ray,
            window.mapViewer.scene
          );
          // 笛卡尔坐标系转为经纬度（弧度）坐标
          let cartographic = Cesium.Cartographic.fromCartesian(cartesian);
          // 再将经纬度（弧度）坐标转化为经纬度角度坐标
          let lng = Cesium.Math.toDegrees(cartographic.longitude);
          let lat = Cesium.Math.toDegrees(cartographic.latitude);
          mapPosition = {
            x: lng,
            y: lat,
            z: cartographic.height + 3,
            description: "地形坐标",
          };
        }
        _this.points.push(mapPosition);
        console.log("鼠标绘制的点", _this.points);
      }, Cesium.ScreenSpaceEventType.LEFT_CLICK);
    },