Initially PMA code supported 2 or 3 planes, with hardcoded view types kU, kV, kZ. Drift direction is assumed to be X (which defines the direction of the best resolution). The code should be modified in order to support any set of views (incl. e.g. kX, kY) and any drift direction.
First step in removing hardcoded view types is done: selection of clusters used to grow and vvalidate tracks in PMAlgTracking class.