public virtual void RcCameraFlyFinished(object sender, _IRenderControlEvents_RcCameraFlyFinishedEvent e)
 {
 }
 // 播放结束
 private void _axRenderControl_RcCameraFlyFinished(object sender, _IRenderControlEvents_RcCameraFlyFinishedEvent e)
 {
     throw new NotImplementedException();
 }