1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
16 /* $Id: AliITSUReconstructor.cxx 58442 2012-09-04 17:17:06Z masera $ */
18 ///////////////////////////////////////////////////////////////////////////////
20 // class for ITS reconstruction //
22 ///////////////////////////////////////////////////////////////////////////////
24 #include "Riostream.h"
25 #include "AliITSUReconstructor.h"
26 #include "AliITSURecoDet.h"
28 #include "AliRawReader.h"
29 #include "AliESDEvent.h"
31 #include "AliTracker.h"
32 #include "AliITSUTrackerGlo.h"
34 #include "AliITSUGeomTGeo.h"
35 #include "AliITSUSegmentationPix.h"
36 #include "AliITSUDigitPix.h"
37 #include "AliITSUClusterizer.h"
38 #include "AliITSUClusterPix.h"
39 #include "AliITSUVertexer.h"
42 ClassImp(AliITSUReconstructor)
44 //___________________________________________________________________________
45 AliITSUReconstructor::AliITSUReconstructor()
52 // Default constructor
56 //___________________________________________________________________________
57 AliITSUReconstructor::~AliITSUReconstructor()
61 if (!fGeom) return; // was not initialized
63 // same cluster finders and recpoint arrays might be attached to different layers
64 for (int i=fGeom->GetNLayers();i--;) {
65 TObject* clFinder = fClusterFinders.At(i);
67 while (fClusterFinders.Remove(clFinder)) {}
79 //______________________________________________________________________
80 void AliITSUReconstructor::Init()
82 // Initalize this reconstructor
83 // Note: fITS cannot be initialized here since it requires RecoParams (not available ar
84 // the moment of reconstructors initialization)
86 AliInfo("Initializing");
87 if (fGeom) AliFatal("was already done, something is wrong...");
89 fGeom = new AliITSUGeomTGeo(kTRUE,kTRUE);
90 AliITSUClusterPix::SetGeom(fGeom);
92 AliITSUClusterizer* clusPIX = 0;
93 fClusters = new TClonesArray*[fGeom->GetNLayers()];
95 for (int ilr=fGeom->GetNLayers();ilr--;) {
97 int tpDet = fGeom->GetLayerChipTypeID(ilr)/AliITSUGeomTGeo::kMaxSegmPerChipType;
98 if (tpDet == AliITSUGeomTGeo::kChipTypePix) {
99 if (!clusPIX) clusPIX = new AliITSUClusterizer();
100 fClusterFinders.AddAtAndExpand(clusPIX, ilr);
101 fClusters[ilr] = new TClonesArray(AliITSUClusterPix::Class());
103 // to expand the buffers to max.size
104 clusPIX->SetSegmentation((AliITSUSegmentationPix*)fGeom->GetSegmentation(ilr));
108 AliFatal(Form("ClusterFinder for detector type %d is not defined",tpDet));
115 //_____________________________________________________________________________
116 void AliITSUReconstructor::Reconstruct(TTree *digitsTree, TTree *clustersTree) const
118 // reconstruct clusters. If clustersTree is provided, write the tree
119 if (!digitsTree) return;
120 AliDebug(1,"ITSU Cluster finder (from digits tree) is initiated here \n");
122 // At the moment only pixel digits
123 TClonesArray *digArrPix = 0;
124 digitsTree->SetBranchAddress("ITSDigitsPix",&digArrPix);
126 // a new tree is created for each event: add each layer as separate branch
127 TBranch *lrBranch[fGeom->GetNLayers()];
129 for (int ilr=0;ilr<fGeom->GetNLayers();ilr++) {
131 if (clustersTree) { // do we write clusters tree?
132 int tp = fGeom->GetLayerChipTypeID(ilr)/AliITSUGeomTGeo::kMaxSegmPerChipType;
133 if (tp==AliITSUGeomTGeo::kChipTypePix) {
134 lrBranch[ilr] = clustersTree->Bronch(Form("ITSRecPoints%d",ilr),"TClonesArray",&fClusters[ilr]);
137 AliFatal(Form("Detector type %d is not defined",tp));
142 AliITSUClusterizer* clFinder = 0;
143 AliMagF* field = dynamic_cast<AliMagF*>(TGeoGlobalMagField::Instance()->GetField());
145 if (field == 0) AliError("Cannot get magnetic field from TGeoGlobalMagField");
146 else bz = field->SolenoidField();
147 const AliITSURecoParam* recPar = GetRecoParam();
149 for (int ilr=0;ilr<fGeom->GetNLayers();ilr++) {
151 fClusters[ilr]->Clear();
152 clFinder = (AliITSUClusterizer*)fClusterFinders[ilr];
153 clFinder->SetSegmentation((AliITSUSegmentationPix*)fGeom->GetSegmentation(ilr));
154 clFinder->SetLayerID(ilr);
155 clFinder->SetClusters(fClusters[ilr]);
156 clFinder->SetRecoParam(recPar); // RS: Do we need to set it for every event?
157 clFinder->SetAllowDiagonalClusterization(recPar->GetAllowDiagonalClusterization(ilr));
158 clFinder->PrepareLorentzAngleCorrection(bz);
160 int modF=fGeom->GetFirstChipIndex(ilr);
161 int modL=fGeom->GetLastChipIndex(ilr)+1;
162 for (int imod=modF;imod<modL;imod++) {
163 digitsTree->GetEntry(imod);
164 int ndig = digArrPix->GetEntries();
166 clFinder->SetVolID(imod);
167 clFinder->SetDigits(digArrPix);
168 clFinder->Clusterize();
171 AliITSUClusterPix::SetSortMode( AliITSUClusterPix::SortModeIdTrkYZ());
172 fClusters[ilr]->Sort();
173 AliDebug(1,Form(" -> Lr%d : %d Cluster",ilr,fClusters[ilr]->GetEntries()));
174 if (clustersTree) lrBranch[ilr]->Fill();
176 if (clustersTree) clustersTree->SetEntries();
180 //_____________________________________________________________________________
181 AliTracker* AliITSUReconstructor::CreateTracker() const
183 // create a ITS tracker
184 AliITSUTrackerGlo* tracker = new AliITSUTrackerGlo((AliITSUReconstructor*)this);
190 //_____________________________________________________________________________
191 AliVertexer* AliITSUReconstructor::CreateVertexer() const
193 // create a ITS vertexer
194 // to be implemented for the upgrade
195 AliInfo("Creating dummy vertexer");
196 // AliDebug(1,"ITSU vertexer should be initiated here\n");
197 return new AliITSUVertexer();
200 //_____________________________________________________________________________
201 AliTrackleter* AliITSUReconstructor::CreateMultFinder() const
203 // create the SPD trackeleter for mult. reconstruction
204 // to be implemented for the upgrade
206 AliDebug(1,"ITSU MultFinder should be initiated here\n");
211 //_____________________________________________________________________________
212 AliTracker* AliITSUReconstructor::CreateTrackleter() const
214 // create the SPD trackeleter (for SPD PlaneEfficiency evaluation)
215 // to be implemented for the upgrade
217 AliDebug(1,"ITSU Trackleter should be initiated here\n");
223 //_____________________________________________________________________________
224 Int_t AliITSUReconstructor::LoadClusters(TTree* treeRP)
226 // read clusters from the tree, if it is provided
227 for (int ilr=fGeom->GetNLayers();ilr--;) {
228 if (!fClusters[ilr]) AliFatal(Form("Clusters array for layer %d is not defined",ilr));
229 TBranch* br = treeRP->GetBranch(Form("ITSRecPoints%d",ilr));
230 if (!br) AliFatal(Form("Provided cluster tree does not contain branch for layer %d",ilr));
231 br->SetAddress(&fClusters[ilr]);
233 treeRP->GetEntry(0); // we are still in 1 ev/tree mode...
239 //_____________________________________________________________________________
240 AliITSURecoDet* AliITSUReconstructor::GetITSInterface()
242 // Create reco oriented interface to geometry
243 if (fITS) return fITS;
245 fITS = new AliITSURecoDet(fGeom,"ITSURecoInterface");
246 int nLr = fITS->GetNLayersActive();
247 for (int ilr=nLr;ilr--;) fITS->GetLayerActive(ilr)->SetClusters(GetClusters(ilr));