vue+cesium 获取鼠标浮动的经纬度

一、需求

是在地图中展示鼠标的经纬度

二、成果展示

三、思路和方法

html

      
经度：{{ mouseMove.lng }}
      
纬度：{{ mouseMove.lat }}
    

属性

data() {
    return {
      mouseMove: {},
    };
  },

css

.mouseMove {
  background: #303336;
  position: absolute;
  bottom: 3px;
  right: 33px;
  padding: 0.429rem;
  z-index: 1;
  color: #fff;
  font-size: 0.6rem;
}

cesium鼠标移动的方法在初始化cesium之后调用这个方法

getMouseMove() {
      let that = this;
      let handler = new Cesium.ScreenSpaceEventHandler(
        that.CesiumViewer.scene.canvas
      );
      handler.setInputAction(function (movement) {
        //具体事件的实现
        var ellipsoid = that.CesiumViewer.scene.globe.ellipsoid;
        //捕获椭球体，将笛卡尔二维平面坐标转为椭球体的笛卡尔三维坐标，返回球体表面的点
        var cartesian = that.CesiumViewer.camera.pickEllipsoid(
          movement.endPosition,
          ellipsoid
        );
        if (cartesian) {
          //将笛卡尔三维坐标转为地图坐标（弧度）
          var cartographic =
            that.CesiumViewer.scene.globe.ellipsoid.cartesianToCartographic(
              cartesian
            );
          //将地图坐标（弧度）转为十进制的度数
          that.mouseMove = {
            lat: Cesium.Math.toDegrees(cartographic.latitude),
            lng: Cesium.Math.toDegrees(cartographic.longitude),
            alt: that.CesiumViewer.camera.positionCartographic.height / 1000,
          };
        }
      }, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
    },