/**************************************************************************
 * This file is property of and copyright by the ALICE HLT Project        *
 * All rights reserved.                                                   *
 *                                                                        *
 * Primary Authors:                                                       *
 *     Copyright 2009       Matthias Kretz <kretz@kde.org>                *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

#ifndef ALIHLTTPCCAPARAMETERS_H
#define ALIHLTTPCCAPARAMETERS_H

namespace AliHLTTPCCAParameters
{                                       /// Global parameters
  enum {
    MaxNStations = 10, // number of stations

    MinimumHitsForRecoTrack = 3
  };

    // Transform CALocal coordinates in global x y z coordinates and back
    // CALocal coor are: X0 is normal to the station module, X2 is paralel to magnetic field. X0 X1 X2 are right handed coordinates
  void CALocalToGlobal( float x0, float x1, float x2, float angle, float& x, float& y, float &z );
  void GlobalToCALocal( float x, float y, float z, float angle, float& x0, float& x1, float& x2 );
  
} // namespace AliHLTTPCCAParameters
//namespace Parameters{  using namespace AliHLTTPCCAParameters; }

namespace AliHLTTPCCAPParameters{ /// parameters for global Performance
  /** 
   *   MC track is reconstructable if:
   *   - it have at least MinimumHitsForMCTrack hits
   *   - momentum of it is not lower than AliHLTTPCCAParameters::ExtraThreshold
   */

  enum{
    
      /**
       * The minimum number of hits for a MCtrack to be reconstructable
       */
    MinimumHitsForMCTrack = 4,
    
      /**
       * The minimum number of hits for a MCtrack to be reconstructable
       */
    MinimumMCPointsForMCTrack = 4,

      /**
       * MCTrack is reconstructed if correspondent recoTrack has NHits >= MinimumHitsForRecoTrack
       */
    MinimumHitsForRecoTrack = AliHLTTPCCAParameters::MinimumHitsForRecoTrack
  }; // enum
  
    /**
     *  if p < ExtraThreshold => track is not reconstructable
     */
  static const float ExtraThreshold = 0.1;
    
    /**
     *  if p < RefThreshold => track is not reference track
     */
  static const float RefThreshold = 1.;

  
    /**
     *  max percent of one MCTrack MCPoints in current track should be more than this value, then thrack is not ghost.
     */
  static const float MinTrackPurity = .7;
} //  namespace AliHLTTPCCAPParameters
namespace PParameters{  using namespace AliHLTTPCCAPParameters; }

#endif // ALIHLTTPCCAPARAMETERS_H