New vertexer class for setting the interaction vertex in TED or TDI positions, to...
[u/mrichter/AliRoot.git] / ITS / AliITSReconstructor.cxx
1 /**************************************************************************
2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3  *                                                                        *
4  * Author: The ALICE Off-line Project.                                    *
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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 }