ITS/AliITSReconstructor.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   *
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  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 // class for ITS reconstruction                                              //
  21 //                                                                           //
  22 ///////////////////////////////////////////////////////////////////////////////
  23
  24 #include "Riostream.h"
  25 #include "AliITSReconstructor.h"
  26 #include "AliRun.h"
  27 #include "AliRawReader.h"
  28 #include "AliITSDetTypeRec.h"
  29 #include "AliITSgeom.h"
  30 #include "AliITSLoader.h"
  31 #include "AliITStrackerMI.h"
  32 #include "AliITStrackerV2.h"
  33 #include "AliITStrackerSA.h"
  34 #include "AliITSVertexerIons.h"
  35 #include "AliITSVertexerFast.h"
  36 #include "AliITSVertexerFixed.h"
  37 #include "AliITSVertexer3D.h"
  38 #include "AliITSVertexerZ.h"
  39 #include "AliITSVertexerCosmics.h"
  40 #include "AliESDEvent.h"
  41 #include "AliITSpidESD.h"
  42 #include "AliITSpidESD1.h"
  43 #include "AliITSpidESD2.h"
  44 #include "AliITSInitGeometry.h"
  45
  46
  47 ClassImp(AliITSReconstructor)
  48
  49 //___________________________________________________________________________
  50 AliITSReconstructor::AliITSReconstructor() : AliReconstructor(),
  51 fItsPID(0),
  52 fDetTypeRec(0)
  53 {
  54   // Default constructor
  55 }
  56  //___________________________________________________________________________
  57 AliITSReconstructor::~AliITSReconstructor(){
  58 // destructor
  59   delete fItsPID;
  60   if(fDetTypeRec) delete fDetTypeRec;
  61 }
  62 //______________________________________________________________________
  63 AliITSReconstructor::AliITSReconstructor(const AliITSReconstructor &ob) :AliReconstructor(ob),
  64 fItsPID(ob.fItsPID),
  65 fDetTypeRec(ob.fDetTypeRec)
  66
  67 {
  68   // Copy constructor
  69 }
  70
  71 //______________________________________________________________________
  72 AliITSReconstructor& AliITSReconstructor::operator=(const AliITSReconstructor&  ob ){
  73   // Assignment operator
  74   this->~AliITSReconstructor();
  75   new(this) AliITSReconstructor(ob);
  76   return *this;
  77 }
  78
  79 //______________________________________________________________________
  80 void AliITSReconstructor::Init() {
  81     // Initalize this constructor bet getting/creating the objects
  82     // nesseary for a proper ITS reconstruction.
  83     // Inputs:
  84     //   none.
  85     // Output:
  86     //   none.
  87     // Return:
  88     //   none.
  89
  90     AliITSInitGeometry initgeom;
  91     AliITSgeom *geom = initgeom.CreateAliITSgeom();
  92     AliInfo(Form("Geometry name: %s",(initgeom.GetGeometryName()).Data()));
  93
  94     fDetTypeRec = new AliITSDetTypeRec();
  95     fDetTypeRec->SetITSgeom(geom);
  96     fDetTypeRec->SetDefaults();
  97
  98     return;
  99 }
 100
 101 //_____________________________________________________________________________
 102 void AliITSReconstructor::Reconstruct(TTree *digitsTree, TTree *clustersTree) const
 103 {
 104 // reconstruct clusters
 105
 106   Int_t cluFindOpt = GetRecoParam()->GetClusterFinder();
 107   Bool_t useV2=kTRUE;   // Default: V2 cluster finder
 108   if(cluFindOpt==1) useV2=kFALSE;
 109
 110   fDetTypeRec->SetTreeAddressD(digitsTree);
 111   fDetTypeRec->MakeBranch(clustersTree,"R");
 112   fDetTypeRec->SetTreeAddressR(clustersTree);
 113   fDetTypeRec->DigitsToRecPoints(digitsTree,clustersTree,0,"All",useV2);
 114 }
 115
 116 //_________________________________________________________________
 117 void AliITSReconstructor::Reconstruct(AliRawReader* rawReader, TTree *clustersTree) const
 118 {
 119   // reconstruct clusters from raw data
 120
 121   fDetTypeRec->SetDefaultClusterFindersV2(kTRUE);
 122   fDetTypeRec->DigitsToRecPoints(rawReader,clustersTree);
 123 }
 124
 125 //_____________________________________________________________________________
 126 AliTracker* AliITSReconstructor::CreateTracker() const
 127 {
 128 // create a ITS tracker
 129
 130   Int_t trackerOpt = GetRecoParam()->GetTracker();
 131   AliTracker* tracker;
 132   if (trackerOpt==1) {
 133     tracker = new AliITStrackerMI(0);
 134     AliITStrackerMI *mit=(AliITStrackerMI*)tracker;
 135     mit->SetDetTypeRec(fDetTypeRec);
 136   }
 137   else if (trackerOpt==2) {
 138     tracker = new AliITStrackerV2(0);
 139   }
 140   else {
 141     tracker =  new AliITStrackerSA(0);  // inherits from AliITStrackerMI
 142     AliITStrackerSA *sat=(AliITStrackerSA*)tracker;
 143     sat->SetDetTypeRec(fDetTypeRec);
 144     if(GetRecoParam()->GetTrackerSAOnly()) sat->SetSAFlag(kTRUE);
 145     if(sat->GetSAFlag())AliDebug(1,"Tracking Performed in ITS only\n");
 146     sat->SetOuterStartLayer(GetRecoParam()->GetOuterStartLayerSA());
 147   }
 148
 149   Int_t pidOpt = GetRecoParam()->GetPID();
 150
 151   AliITSReconstructor* nc = const_cast<AliITSReconstructor*>(this);
 152   if(pidOpt==1){
 153     Info("FillESD","ITS LandauFitPID option has been selected\n");
 154     nc->fItsPID = new AliITSpidESD2((AliITStrackerMI*)tracker);
 155   }
 156   else{
 157     Info("FillESD","ITS default PID\n");
 158     Double_t parITS[] = {79.,0.13, 5.}; //IB: this is  "pp tuning"
 159     nc->fItsPID = new AliITSpidESD1(parITS);
 160   }
 161
 162   return tracker;
 163
 164 }
 165
 166 //_____________________________________________________________________________
 167 AliVertexer* AliITSReconstructor::CreateVertexer() const
 168 {
 169 // create a ITS vertexer
 170
 171   Int_t vtxOpt = GetRecoParam()->GetVertexer();
 172   if(vtxOpt==3){
 173     Info("CreateVertexer","a AliITSVertexerIons object has been selected\n");
 174     return new AliITSVertexerIons();
 175   }
 176   if(vtxOpt==4){
 177     Double_t smear[3]={0.005,0.005,0.01};
 178     Info("CreateVertexer","a AliITSVertexerFast object has been selected\n");
 179     return new AliITSVertexerFast(smear);
 180   }
 181   if(vtxOpt==1){
 182     Info("CreateVertexer","a AliITSVertexerZ object has been selected\n");
 183     return new AliITSVertexerZ();
 184   }
 185   if(vtxOpt==2){
 186     Info("CreateVertexer","a AliITSVertexerCosmics object has been selected\n");
 187     return new AliITSVertexerCosmics();
 188   }
 189   if(vtxOpt==5){
 190     Info("CreateVertexer","vertex is fixed in the position of the TDI\n");
 191     return new AliITSVertexerFixed("TDI");
 192   }
 193   if(vtxOpt==6){
 194     Info("CreateVertexer","vertex is fixed in the position of the TED\n");
 195     return new AliITSVertexerFixed("TED");
 196   }
 197   // by default an AliITSVertexer3D object is instatiated
 198   Info("CreateVertexer","a AliITSVertexer3D object has been selected\n");
 199   AliITSVertexer3D*  vtxr = new AliITSVertexer3D();
 200   Float_t dzw=GetRecoParam()->GetVertexer3DWideFiducialRegionZ();
 201   Float_t drw=GetRecoParam()->GetVertexer3DWideFiducialRegionR();
 202   vtxr->SetWideFiducialRegion(dzw,drw);
 203   Float_t dzn=GetRecoParam()->GetVertexer3DNarrowFiducialRegionZ();
 204   Float_t drn=GetRecoParam()->GetVertexer3DNarrowFiducialRegionR();
 205   vtxr->SetNarrowFiducialRegion(dzn,drn);
 206   Float_t dphil=GetRecoParam()->GetVertexer3DLooseDeltaPhiCut();
 207   Float_t dphit=GetRecoParam()->GetVertexer3DTightDeltaPhiCut();
 208   vtxr->SetDeltaPhiCuts(dphil,dphit);
 209   Float_t dcacut=GetRecoParam()->GetVertexer3DDCACut();
 210   vtxr->SetDCACut(dcacut);
 211   return vtxr;
 212 }
 213
 214 //_____________________________________________________________________________
 215 void AliITSReconstructor::FillESD(TTree * /*digitsTree*/, TTree *clustersTree,
 216                                   AliESDEvent* esd) const
 217 {
 218 // make PID, find V0s and cascade
 219   if(fItsPID!=0) {
 220     Int_t pidOpt = GetRecoParam()->GetPID();
 221     if(pidOpt==1){
 222       fItsPID->MakePID(clustersTree,esd);
 223     }else{
 224       fItsPID->MakePID(esd);
 225     }
 226   }
 227   else {
 228     Error("FillESD","!! cannot do the PID !!\n");
 229   }
 230 }