cesium左键事件取值

function bindMapClickEvent() {
    if (!handler) {
      handler = new ScreenSpaceEventHandler(viewer.cesium.scene.canvas);
    }
    handler.setInputAction((event) => {
      // console.log('鼠标点击事件', event.position)
      // 获取移动点位置
      const [longitude, latitude]: any = c3toCoordinates(
        c2toC3(event.position, viewer.cesium),
        viewer.cesium
      );
      console.log("Clicked at: " + longitude + ", " + latitude);
      const params = { latLon: { lat: latitude, lon: longitude }};
      PanelRender.show(params);
      emitter.emit('switchElementTimingPoint', params);
    }, ScreenSpaceEventType.LEFT_CLICK);
  }
  function c3toCoordinates(
    c3: Cartesian3,
    viewer: any
  ): [number, number, number] | null {
    if (!defined(c3)) {
      return null;
    }
    const { ellipsoid } = viewer.scene.globe;
    const cartographic = ellipsoid.cartesianToCartographic(c3);
    return [
      cMath.toDegrees(cartographic.longitude),
      cMath.toDegrees(cartographic.latitude),
      cartographic.height,
    ];
  }
  function c2toC3(c2: Cartesian2, viewer: any): Cartesian3 {
    const pickRay = viewer.camera.getPickRay(c2);
    return <Cartesian3>viewer.scene.globe.pick(pickRay, viewer.scene);
  }