TRD/AliTRDtrackletWord.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id: AliTRDtrackletWord.cxx 28397 2008-09-02 09:33:00Z cblume $ */
  17
  18 ////////////////////////////////////////////////////////////////////////////
  19 //                                                                        //
  20 //  A tracklet word as from FEE                                           //
  21 //                                                                        //
  22 //  Author: J. Klein (Jochen.Klein@cern.ch)                               //
  23 //                                                                        //
  24 ////////////////////////////////////////////////////////////////////////////
  25
  26 #include "AliTRDtrackletWord.h"
  27 #include "AliTRDgeometry.h"
  28 #include "AliTRDpadPlane.h"
  29 #include "AliLog.h"
  30
  31 ClassImp(AliTRDtrackletWord)
  32
  33 AliTRDgeometry* AliTRDtrackletWord::fgGeo = 0x0;
  34
  35 AliTRDtrackletWord::AliTRDtrackletWord(UInt_t trackletWord) :
  36   AliTRDtrackletBase(),
  37   fHCId(-1),
  38   fTrackletWord(trackletWord)
  39 {
  40   if (!fgGeo)
  41     fgGeo = new AliTRDgeometry;
  42 }
  43
  44 AliTRDtrackletWord::AliTRDtrackletWord(UInt_t trackletWord, Int_t hcid) :
  45   AliTRDtrackletBase(),
  46   fHCId(hcid),
  47   fTrackletWord(trackletWord)
  48 {
  49   if (!fgGeo)
  50     fgGeo = new AliTRDgeometry;
  51 }
  52
  53 AliTRDtrackletWord::AliTRDtrackletWord(const AliTRDtrackletWord &rhs) :
  54   AliTRDtrackletBase(rhs),
  55   fHCId(rhs.fHCId),
  56   fTrackletWord(rhs.fTrackletWord)
  57 {
  58
  59   if (!fgGeo)
  60     fgGeo = new AliTRDgeometry;
  61 }
  62
  63 AliTRDtrackletWord::~AliTRDtrackletWord()
  64 {
  65
  66 }
  67
  68 Int_t AliTRDtrackletWord::GetYbin() const {
  69   // returns (signed) value of Y
  70   if (fTrackletWord & 0x1000) {
  71     return -((~(fTrackletWord-1)) & 0x1fff);
  72   }
  73   else {
  74     return (fTrackletWord & 0x1fff);
  75   }
  76 }
  77
  78 Int_t AliTRDtrackletWord::GetdY() const
  79 {
  80   // returns (signed) value of the deflection length
  81   if (fTrackletWord & (1 << 19)) {
  82     return -((~((fTrackletWord >> 13) - 1)) & 0x7f);
  83   }
  84   else {
  85     return ((fTrackletWord >> 13) & 0x7f);
  86   }
  87 }
  88
  89 Int_t AliTRDtrackletWord::GetROB() const
  90 {
  91   return 2 * (GetZbin() / 4) + (GetY() > 0 ? 1 : 0);
  92 }
  93
  94 Int_t AliTRDtrackletWord::GetMCM() const
  95 {
  96   AliTRDpadPlane *pp = fgGeo->GetPadPlane(GetDetector());
  97   return (((Int_t) ((GetY()) / pp->GetWidthIPad()) + 72) / 18) % 4
  98     + 4 * (GetZbin() % 4);
  99 }
 100