Test TOF to reject pile-up track (Raphaelle)

[u/mrichter/AliRoot.git] / TRD / AliTRDtrackletWord.cxx

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 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
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 * Author: The ALICE Off-line Project.                                    *
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 * provided "as is" without express or implied warranty.                  *
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/* $Id: AliTRDtrackletWord.cxx 28397 2008-09-02 09:33:00Z cblume $ */

////////////////////////////////////////////////////////////////////////////
//                                                                        //
//  A tracklet word as from FEE                                           //
//                                                                        //
//  Author: J. Klein (Jochen.Klein@cern.ch)                               //
//                                                                        //
////////////////////////////////////////////////////////////////////////////

#include "AliTRDtrackletWord.h"
#include "AliTRDgeometry.h"
#include "AliTRDpadPlane.h"
#include "AliLog.h"

ClassImp(AliTRDtrackletWord)

AliTRDgeometry* AliTRDtrackletWord::fgGeo = 0x0;

AliTRDtrackletWord::AliTRDtrackletWord(UInt_t trackletWord) :
  AliTRDtrackletBase(),
  fHCId(-1),
  fTrackletWord(trackletWord)
{
  if (!fgGeo)
    fgGeo = new AliTRDgeometry;
}

AliTRDtrackletWord::AliTRDtrackletWord(UInt_t trackletWord, Int_t hcid) :
  AliTRDtrackletBase(),
  fHCId(hcid),
  fTrackletWord(trackletWord)
{
  if (!fgGeo)
    fgGeo = new AliTRDgeometry;
}

AliTRDtrackletWord::AliTRDtrackletWord(const AliTRDtrackletWord &rhs) :
  AliTRDtrackletBase(rhs),
  fHCId(rhs.fHCId),
  fTrackletWord(rhs.fTrackletWord)
{

  if (!fgGeo)
    fgGeo = new AliTRDgeometry;
}

AliTRDtrackletWord::~AliTRDtrackletWord()
{

}

Int_t AliTRDtrackletWord::GetYbin() const {
  // returns (signed) value of Y
  if (fTrackletWord & 0x1000) {
    return -((~(fTrackletWord-1)) & 0x1fff);
  }
  else {
    return (fTrackletWord & 0x1fff);
  }
}

Int_t AliTRDtrackletWord::GetdY() const
{
  // returns (signed) value of the deflection length
  if (fTrackletWord & (1 << 19)) {
    return -((~((fTrackletWord >> 13) - 1)) & 0x7f);
  }
  else {
    return ((fTrackletWord >> 13) & 0x7f);
  }
}

Int_t AliTRDtrackletWord::GetROB() const
{
  return 2 * (GetZbin() / 4) + (GetY() > 0 ? 1 : 0);
}

Int_t AliTRDtrackletWord::GetMCM() const
{
  AliTRDpadPlane *pp = fgGeo->GetPadPlane(GetDetector());
  return (((Int_t) ((GetY()) / pp->GetWidthIPad()) + 72) / 18) % 4
    + 4 * (GetZbin() % 4);
}