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 /* $Id$ */
  17
  18 /////////////////////////////////////////////////////////////////////////
  19 //                                                                     //
  20 //  Tracking sector                                                    //
  21 //                                                                     //
  22 /////////////////////////////////////////////////////////////////////////
  23
  24 #include <TObject.h>
  25
  26 #include "AliRun.h"
  27
  28 #include "AliTRD.h"
  29 #include "AliTRDgeometry.h"
  30 #include "AliTRDcluster.h"
  31 #include "AliTRDtimeBin.h"
  32 #include "AliTRDtrackingSector.h"
  33 #include "AliTRDparameter.h"
  34
  35 ClassImp(AliTRDtrackingSector)
  36
  37 //_______________________________________________________
  38 AliTRDtrackingSector::~AliTRDtrackingSector()
  39 {
  40   //
  41   // Destructor
  42   //
  43
  44   delete fTimeBin;
  45
  46 }
  47
  48 //_______________________________________________________
  49 AliTRDtimeBin &AliTRDtrackingSector::operator[](Int_t i)
  50 {
  51   //
  52   // Index operator
  53   //
  54
  55   return *(fTimeBin+i);
  56
  57 }
  58
  59 //_______________________________________________________
  60 void AliTRDtrackingSector::SetUp()
  61 {
  62   //
  63   // Initialization
  64   //
  65
  66   AliTRD *trd = (AliTRD*) gAlice->GetDetector("TRD");
  67   fGeom = trd->GetGeometry();
  68
  69   fTimeBinSize = fGeom->GetTimeBinSize();
  70
  71   fN = AliTRDgeometry::Nplan() * (Int_t(AliTRDgeometry::DrThick()
  72                                        /fTimeBinSize) + 1);
  73
  74   fTimeBin = new AliTRDtimeBin[fN];
  75
  76   if (!fPar) {
  77     fPar = new AliTRDparameter("TRDparameter","Standard TRD parameter");
  78   }
  79
  80   fTimeBinSize = fPar->GetTimeBinSize();
  81
  82 }
  83
  84 //______________________________________________________
  85 Double_t AliTRDtrackingSector::GetX(Int_t tb) const
  86 {
  87   //
  88   // Get global x coordinate
  89   //
  90
  91   if( (tb<0) || (tb>fN-1)) {
  92     fprintf(stderr,"AliTRDtrackingSector::GetX: TimeBin index is out of range !\n");
  93     return -99999.;
  94   }
  95   else {
  96
  97     Int_t tbPerPlane = fN/AliTRDgeometry::Nplan();
  98     Int_t localTb = tbPerPlane - tb%tbPerPlane - 1;
  99
 100     Int_t plane = tb/tbPerPlane;
 101     Float_t t0 = fPar->GetTime0(plane);
 102     Double_t x = t0 - (localTb + 0.5) * fTimeBinSize;
 103
 104     return x;
 105
 106   }
 107
 108 }
 109
 110 //______________________________________________________
 111 Int_t AliTRDtrackingSector::GetTimeBinNumber(Double_t x) const
 112 {
 113   //
 114   // Returns the time bin number
 115   //
 116
 117   Float_t rOut = fPar->GetTime0(AliTRDgeometry::Nplan()-1);
 118   Float_t rIn  = fPar->GetTime0(0) - AliTRDgeometry::DrThick();
 119
 120
 121   if(x >= rOut) return fN-1;
 122   if(x <= rIn)  return 0;
 123
 124   Int_t plane;
 125   for (plane = AliTRDgeometry::Nplan()-1; plane >= 0; plane--) {
 126     if(x > (fPar->GetTime0(plane) - AliTRDgeometry::DrThick())) break;
 127   }
 128
 129   Int_t tbPerPlane = fN/AliTRDgeometry::Nplan();
 130   Int_t localTb = Int_t((fPar->GetTime0(plane)-x)/fTimeBinSize);
 131
 132   if((localTb < 0) || (localTb >= tbPerPlane)) {
 133     printf("AliTRDtrackingSector::GetTimeBinNumber: \n");
 134     printf("local time bin %d is out of bounds [0..%d]: x = %f \n",
 135            localTb,tbPerPlane-1,x);
 136     return -1;
 137   }
 138
 139   Int_t timeBin = (plane + 1) * tbPerPlane - 1 - localTb;
 140
 141   return timeBin;
 142 }
 143
 144 //______________________________________________________
 145 Int_t AliTRDtrackingSector::GetTimeBin(Int_t det, Int_t localTb) const
 146 {
 147   //
 148   // Time bin
 149   //
 150
 151   Int_t plane = fGeom->GetPlane(det);
 152
 153   Int_t tbPerPlane = fN/AliTRDgeometry::Nplan();
 154
 155   Int_t timeBin = (plane + 1) * tbPerPlane - 1 - localTb;
 156
 157   return timeBin;
 158
 159 }
 160
 161
 162 //______________________________________________________
 163
 164 Bool_t AliTRDtrackingSector::TECframe(Int_t tb, Double_t y, Double_t z) const
 165 {
 166   //
 167   // Returns <true> if point defined by <x(tb),y,z> is within
 168   // the TEC G10 frame, otherwise returns <false>
 169   //
 170
 171   if((tb > (fN-1)) || (tb < 0)) return kFALSE;
 172
 173   Int_t tbPerPlane = fN/AliTRDgeometry::Nplan();
 174   Int_t plane = tb/tbPerPlane;
 175
 176   Double_t x = GetX(tb);
 177   y = TMath::Abs(y);
 178
 179   if((y > fGeom->GetChamberWidth(plane)/2.) &&
 180      (y < x*TMath::Tan(0.5*AliTRDgeometry::GetAlpha()))) return kTRUE;
 181
 182   Double_t zmin, zmax;
 183   Float_t  fRowPadSize, fRow0;
 184   Int_t    nPadRows;
 185
 186   for(Int_t iCha = 1; iCha < AliTRDgeometry::Ncham(); iCha++) {
 187
 188     fRow0 = fPar->GetRow0(plane,iCha-1,0);
 189     fRowPadSize = fPar->GetRowPadSize(plane,iCha-1,0);
 190     nPadRows = fPar->GetRowMax(plane,iCha-1,0);
 191     zmin = fRow0 - fRowPadSize/2 + fRowPadSize * nPadRows;
 192
 193     fRow0 = fPar->GetRow0(plane,iCha,0);
 194     fRowPadSize = fPar->GetRowPadSize(plane,iCha,0);
 195     zmax = fRow0 - fRowPadSize/2;
 196
 197     if((z > zmin) && (z < zmax)) return kTRUE;
 198   }
 199
 200   return kFALSE;
 201
 202 }