TRD/AliTRDtrackingSector.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 /*
  17 $Log$
  18 Revision 1.1.2.2  2000/10/04 16:34:58  cblume
  19 Replace include files by forward declarations
  20
  21 Revision 1.1.2.1  2000/09/22 14:47:52  cblume
  22 Add the tracking code
  23
  24 */
  25
  26 #include <TObject.h>
  27
  28 #include "AliRun.h"
  29
  30 #include "AliTRD.h"
  31 #include "AliTRDconst.h"
  32 #include "AliTRDgeometry.h"
  33 #include "AliTRDcluster.h"
  34 #include "AliTRDtimeBin.h"
  35
  36 #include "AliTRDtrackingSector.h"
  37
  38
  39 ClassImp(AliTRDtrackingSector)
  40
  41 //_______________________________________________________
  42
  43 AliTRDtrackingSector::~AliTRDtrackingSector()
  44 {
  45   //
  46   // Destructor
  47   //
  48
  49   delete[] fTimeBin;
  50
  51 }
  52
  53 //_______________________________________________________
  54 AliTRDtimeBin &AliTRDtrackingSector::operator[](Int_t i)
  55 {
  56   //
  57   // Index operator
  58   //
  59
  60   return *(fTimeBin+i);
  61
  62 }
  63
  64 //_______________________________________________________
  65
  66 void AliTRDtrackingSector::SetUp()
  67 {
  68
  69   AliTRD *TRD = (AliTRD*) gAlice->GetDetector("TRD");
  70   fGeom = TRD->GetGeometry();
  71
  72   fTimeBinSize = fGeom->GetTimeBinSize();
  73
  74   fN = kNplan * (Int_t(kDrThick/fTimeBinSize) + 1);
  75
  76   fTimeBin = new AliTRDtimeBin[fN];
  77
  78 }
  79
  80 //______________________________________________________
  81
  82 Double_t AliTRDtrackingSector::GetX(Int_t l) const
  83 {
  84   if( (l<0) || (l>fN-1)) {
  85     fprintf(stderr,"AliTRDtrackingSector::GetX: TimeBin index is out of range !\n");
  86     return -99999.;
  87   }
  88   else {
  89
  90     Int_t tb_per_plane = fN/kNplan;
  91     Int_t plane = l/tb_per_plane;
  92     Int_t time_slice = l%(Int_t(kDrThick/fTimeBinSize) + 1);
  93
  94     Float_t t0 = fGeom->GetTime0(plane);
  95     Double_t x = t0 + time_slice * fTimeBinSize;
  96
  97     //    cerr<<"plane, tb, x = "<<plane<<","<<time_slice<<","<<x<<endl;
  98
  99     return x;
 100   }
 101 }
 102
 103 //______________________________________________________
 104
 105 Double_t AliTRDtrackingSector::GetMaxY(Int_t l) const
 106 {
 107
 108   if((l<(fN-1)) && (l>-1)) {
 109     Int_t tb_per_plane = fN/kNplan;
 110     Int_t plane = l/tb_per_plane;
 111     return fGeom->GetChamberWidth(plane);
 112   }
 113   else {
 114     fprintf(stderr,
 115     "AliTRDtrackingSector::GetMaxY: TimeBin index is out of range !\n");
 116     if(l<0) return fGeom->GetChamberWidth(0);
 117     else return fGeom->GetChamberWidth(kNplan-1);
 118   }
 119 }
 120
 121 //______________________________________________________
 122
 123 Int_t AliTRDtrackingSector::GetTimeBinNumber(Double_t x) const
 124 {
 125   Float_t r_out = fGeom->GetTime0(kNplan-1) + kDrThick;
 126   Float_t r_in = fGeom->GetTime0(0);
 127   //  cerr<<"GetTimeBinNumber: r_in,r_out = "<<r_in<<","<<r_out<<endl;
 128
 129   if(x >= r_out) return fN-1;
 130   if(x <= r_in) return 0;
 131
 132   Float_t gap = fGeom->GetTime0(1) - fGeom->GetTime0(0);
 133   //  cerr<<"GetTimeBinNumber: gap = "<<gap<<endl;
 134
 135   Int_t plane = Int_t((x - r_in + fTimeBinSize/2)/gap);
 136   //  cerr<<"GetTimeBinNumber: plane="<<plane<<endl;
 137
 138   Int_t local_tb = Int_t((x-fGeom->GetTime0(plane))/fTimeBinSize + 0.5);
 139   //  cerr<<"GetTimeBinNumber: local_tb="<<local_tb<<endl;
 140
 141   Int_t time_bin = plane * (Int_t(kDrThick/fTimeBinSize) + 1) + local_tb;
 142   //  cerr<<"GetTimeBinNumber: time_bin = "<<time_bin<<endl;
 143
 144
 145   return time_bin;
 146 }
 147
 148 //______________________________________________________
 149
 150 Int_t AliTRDtrackingSector::GetTimeBin(Int_t det, Int_t local_tb) const
 151 {
 152   Int_t plane = fGeom->GetPlane(det);
 153
 154   Int_t time_bin = plane * (Int_t(kDrThick/fTimeBinSize) + 1) + local_tb;
 155   return time_bin;
 156 }
 157