private void OgreControl_MouseMove(object sender, MouseEventArgs e)
 {
     if (DraggingCamera)
     {
         Point mouselookdelta = new Point(e.Location.X - OldMouseLocation.X, e.Location.Y - OldMouseLocation.Y);
         yaw   += mouselookdelta.X * 0.01f;
         pitch += mouselookdelta.Y * 0.01f;
         //distance += e.Delta;
         VP.SetCameraYawPitchDistance(yaw, pitch, distance);
     }
     OldMouseLocation = e.Location;
 }