public static void ZoomPerspective(Camera camera_, AbstractCoordinateSystem system_, float v_)
 {
     system_.Z = -v_ * _perspectiveProjectionFactor;
     camera_.transform.position = system_.WorldPosition;
     //TODO UnitPerPixel at a designated plane (z)
 }
 public static void ZoomOrthographic(Camera camera_, AbstractCoordinateSystem _, float v_)
 {
     camera_.orthographicSize = v_;
     UpdateViewHeight(v_);
 }