Line data    Source code

       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          48 : ClassImp(AliTRDtrackletWord)
      32             : 
      33             : AliTRDgeometry* AliTRDtrackletWord::fgGeo = 0x0;
      34             : 
      35             : AliTRDtrackletWord::AliTRDtrackletWord(UInt_t trackletWord) :
      36           2 :   AliTRDtrackletBase(),
      37           2 :   fHCId(-1),
      38           2 :   fTrackletWord(trackletWord)
      39          10 : {
      40           2 :   if (!fgGeo)
      41           6 :     fgGeo = new AliTRDgeometry;
      42           4 : }
      43             : 
      44             : AliTRDtrackletWord::AliTRDtrackletWord(UInt_t trackletWord, Int_t hcid) :
      45         359 :   AliTRDtrackletBase(),
      46         359 :   fHCId(hcid),
      47         359 :   fTrackletWord(trackletWord)
      48        1795 : {
      49         359 :   if (!fgGeo)
      50           3 :     fgGeo = new AliTRDgeometry;
      51         718 : }
      52             : 
      53             : AliTRDtrackletWord::AliTRDtrackletWord(const AliTRDtrackletWord &rhs) :
      54           0 :   AliTRDtrackletBase(rhs),
      55           0 :   fHCId(rhs.fHCId),
      56           0 :   fTrackletWord(rhs.fTrackletWord)
      57           0 : {
      58             : 
      59           0 :   if (!fgGeo)
      60           0 :     fgGeo = new AliTRDgeometry;
      61           0 : }
      62             : 
      63             : AliTRDtrackletWord::~AliTRDtrackletWord()
      64         576 : {
      65             : 
      66         576 : }
      67             : 
      68             : Int_t AliTRDtrackletWord::GetYbin() const {
      69             :   // returns (signed) value of Y
      70           0 :   if (fTrackletWord & 0x1000) {
      71           0 :     return -((~(fTrackletWord-1)) & 0x1fff);
      72             :   }
      73             :   else {
      74           0 :     return (fTrackletWord & 0x1fff);
      75             :   }
      76           0 : }
      77             : 
      78             : Int_t AliTRDtrackletWord::GetdY() const
      79             : {
      80             :   // returns (signed) value of the deflection length
      81           0 :   if (fTrackletWord & (1 << 19)) {
      82           0 :     return -((~((fTrackletWord >> 13) - 1)) & 0x7f);
      83             :   }
      84             :   else {
      85           0 :     return ((fTrackletWord >> 13) & 0x7f);
      86             :   }
      87           0 : }
      88             : 
      89             : Int_t AliTRDtrackletWord::GetROB() const
      90             : {
      91           0 :   return 2 * (GetZbin() / 4) + (GetY() > 0 ? 1 : 0);
      92             : }
      93             : 
      94             : Int_t AliTRDtrackletWord::GetMCM() const
      95             : {
      96           0 :   AliTRDpadPlane *pp = fgGeo->GetPadPlane(GetDetector());
      97           0 :   return (((Int_t) ((GetY()) / pp->GetWidthIPad()) + 72) / 18) % 4
      98           0 :     + 4 * (GetZbin() % 4);
      99             : }
     100             :