cesium獲取鼠標的實時經(jīng)緯度和高度信息。

      var cesiumViewer = this.viewer;
      var canvas = cesiumViewer.scene.canvas;
      var ellipsoid = cesiumViewer.scene.globe.ellipsoid;
      var handler = new Cesium.ScreenSpaceEventHandler(canvas);
      handler.setInputAction(function(movement){
          //捕獲橢球體，將笛卡爾二維平面坐標轉(zhuǎn)為橢球體的笛卡爾三維坐標，返回球體表面的點
          var cartesian = cesiumViewer.camera.pickEllipsoid(movement.endPosition, ellipsoid);
          if(cartesian){
              //將笛卡爾三維坐標轉(zhuǎn)為地圖坐標（弧度）
              var cartographic = cesiumViewer.scene.globe.ellipsoid.cartesianToCartographic(cartesian);
              //將地圖坐標（弧度）轉(zhuǎn)為十進制的度數(shù)
              var lat = Cesium.Math.toDegrees(cartographic.latitude).toFixed(4);
              var lng = Cesium.Math.toDegrees(cartographic.longitude).toFixed(4);
              var height = (cesiumViewer.camera.positionCartographic.height/1000).toFixed(2);

              // console.log(lng+','+lat+","+height);
            _this.mousePosition = lng+", "+lat+", "+height;
          }
      },Cesium.ScreenSpaceEventType.MOUSE_MOVE)