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   *
   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 // 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 "AliITSVertexer3D.h"
  37 #include "AliITSVertexerZ.h"
  38 #include "AliITSVertexerCosmics.h"
  39 #include "AliESDEvent.h"
  40 #include "AliITSpidESD.h"
  41 #include "AliITSpidESD1.h"
  42 #include "AliITSpidESD2.h"
  43 #include "AliITSInitGeometry.h"
  44
  45
  46 ClassImp(AliITSReconstructor)
  47
  48 //___________________________________________________________________________
  49 AliITSReconstructor::AliITSReconstructor() : AliReconstructor(),
  50 fItsPID(0),
  51 fDetTypeRec(0)
  52 {
  53   // Default constructor
  54 }
  55  //___________________________________________________________________________
  56 AliITSReconstructor::~AliITSReconstructor(){
  57 // destructor
  58   delete fItsPID;
  59   if(fDetTypeRec) delete fDetTypeRec;
  60 }
  61 //______________________________________________________________________
  62 AliITSReconstructor::AliITSReconstructor(const AliITSReconstructor &ob) :AliReconstructor(ob),
  63 fItsPID(ob.fItsPID),
  64 fDetTypeRec(ob.fDetTypeRec)
  65
  66 {
  67   // Copy constructor
  68 }
  69
  70 //______________________________________________________________________
  71 AliITSReconstructor& AliITSReconstructor::operator=(const AliITSReconstructor&  ob ){
  72   // Assignment operator
  73   this->~AliITSReconstructor();
  74   new(this) AliITSReconstructor(ob);
  75   return *this;
  76 }
  77
  78 //______________________________________________________________________
  79 void AliITSReconstructor::Init() {
  80     // Initalize this constructor bet getting/creating the objects
  81     // nesseary for a proper ITS reconstruction.
  82     // Inputs:
  83     //   none.
  84     // Output:
  85     //   none.
  86     // Return:
  87     //   none.
  88
  89     AliITSInitGeometry initgeom;
  90     AliITSgeom *geom = initgeom.CreateAliITSgeom();
  91     AliInfo(Form("Geometry name: %s",(initgeom.GetGeometryName()).Data()));
  92
  93     fDetTypeRec = new AliITSDetTypeRec();
  94     fDetTypeRec->SetITSgeom(geom);
  95     fDetTypeRec->SetDefaults();
  96
  97     return;
  98 }
  99
 100 //_____________________________________________________________________________
 101 void AliITSReconstructor::Reconstruct(TTree *digitsTree, TTree *clustersTree) const
 102 {
 103 // reconstruct clusters
 104
 105   TString option = GetOption();
 106   Bool_t clusfinder=kTRUE;   // Default: V2 cluster finder
 107   if(option.Contains("OrigCF"))clusfinder=kFALSE;
 108
 109   fDetTypeRec->SetTreeAddressD(digitsTree);
 110   fDetTypeRec->MakeBranch(clustersTree,"R");
 111   fDetTypeRec->SetTreeAddressR(clustersTree);
 112   fDetTypeRec->DigitsToRecPoints(digitsTree,clustersTree,0,"All",clusfinder);
 113 }
 114
 115 //_________________________________________________________________
 116 void AliITSReconstructor::Reconstruct(AliRawReader* rawReader, TTree *clustersTree) const
 117 {
 118   // reconstruct clusters from raw data
 119
 120   fDetTypeRec->SetDefaultClusterFindersV2(kTRUE);
 121   fDetTypeRec->DigitsToRecPoints(rawReader,clustersTree);
 122 }
 123
 124 //_____________________________________________________________________________
 125 AliTracker* AliITSReconstructor::CreateTracker() const
 126 {
 127 // create a ITS tracker
 128
 129
 130   TString selectedTracker = GetOption();
 131   AliTracker* tracker;
 132   if (selectedTracker.Contains("MI")) {
 133     tracker = new AliITStrackerMI(0);
 134     AliITStrackerMI *mit=(AliITStrackerMI*)tracker;
 135     mit->SetDetTypeRec(fDetTypeRec);
 136   }
 137   else if (selectedTracker.Contains("V2")) {
 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(selectedTracker.Contains("onlyITS"))sat->SetSAFlag(kTRUE);
 145     if(sat->GetSAFlag())AliDebug(1,"Tracking Performed in ITS only\n");
 146     if(selectedTracker.Contains("cosmics")||selectedTracker.Contains("COSMICS"))
 147       sat->SetOuterStartLayer(AliITSgeomTGeo::GetNLayers()-2);
 148   }
 149
 150   TString selectedPIDmethod = GetOption();
 151   AliITSReconstructor* nc = const_cast<AliITSReconstructor*>(this);
 152   if(selectedPIDmethod.Contains("LandauFitPID")){
 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   TString selectedVertexer = GetOption();
 172   if(selectedVertexer.Contains("ions") || selectedVertexer.Contains("IONS")){
 173     Info("CreateVertexer","a AliITSVertexerIons object has been selected\n");
 174     return new AliITSVertexerIons();
 175   }
 176   if(selectedVertexer.Contains("smear") || selectedVertexer.Contains("SMEAR")){
 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(selectedVertexer.Contains("vertexerz") || selectedVertexer.Contains("VERTEXERZ")){
 182     Info("CreateVertexer","a AliITSVertexerZ object has been selected\n");
 183     return new AliITSVertexerZ();
 184   }
 185   if(selectedVertexer.Contains("cosmics") || selectedVertexer.Contains("COSMICS")){
 186     Info("CreateVertexer","a AliITSVertexerCosmics object has been selected\n");
 187     return new AliITSVertexerCosmics();
 188   }
 189   // by default an AliITSVertexer3D object is instatiated
 190   Info("CreateVertexer","a AliITSVertexer3D object has been selected\n");
 191   return new AliITSVertexer3D();
 192 }
 193
 194 //_____________________________________________________________________________
 195 void AliITSReconstructor::FillESD(TTree * /*digitsTree*/, TTree *clustersTree,
 196                                   AliESDEvent* esd) const
 197 {
 198 // make PID, find V0s and cascade
 199   if(fItsPID!=0) {
 200     TString selectedPIDmethod = GetOption();
 201     if(selectedPIDmethod.Contains("LandauFitPID")){
 202       fItsPID->MakePID(clustersTree,esd);
 203     }
 204     else{
 205       fItsPID->MakePID(esd);
 206     }
 207   }
 208   else {
 209     Error("FillESD","!! cannot do the PID !!\n");
 210   }
 211 }