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"
41 ClassImp(AliITSUReconstructor)
43 //___________________________________________________________________________
44 AliITSUReconstructor::AliITSUReconstructor()
51 // Default constructor
55 //___________________________________________________________________________
56 AliITSUReconstructor::~AliITSUReconstructor()
60 if (!fGeom) return; // was not initialized
62 // same cluster finders and recpoint arrays might be attached to different layers
63 for (int i=fGeom->GetNLayers();i--;) {
64 TObject* clFinder = fClusterFinders.At(i);
66 while (fClusterFinders.Remove(clFinder)) {}
78 //______________________________________________________________________
79 void AliITSUReconstructor::Init()
81 // Initalize this reconstructor
82 // Note: fITS cannot be initialized here since it requires RecoParams (not available ar
83 // the moment of reconstructors initialization)
85 AliInfo("Initializing");
86 if (fGeom) AliFatal("was already done, something is wrong...");
88 fGeom = new AliITSUGeomTGeo(kTRUE,kTRUE);
89 AliITSUClusterPix::SetGeom(fGeom);
91 AliITSUClusterizer* clusPIX = 0;
92 fClusters = new TClonesArray*[fGeom->GetNLayers()];
94 for (int ilr=fGeom->GetNLayers();ilr--;) {
96 int tpDet = fGeom->GetLayerDetTypeID(ilr)/AliITSUGeomTGeo::kMaxSegmPerDetType;
97 if (tpDet == AliITSUGeomTGeo::kDetTypePix) {
98 if (!clusPIX) clusPIX = new AliITSUClusterizer();
99 fClusterFinders.AddAtAndExpand(clusPIX, ilr);
100 fClusters[ilr] = new TClonesArray(AliITSUClusterPix::Class());
102 // to expand the buffers to max.size
103 clusPIX->SetSegmentation((AliITSUSegmentationPix*)fGeom->GetSegmentation(ilr));
107 AliFatal(Form("ClusterFinder for detector type %d is not defined",tpDet));
114 //_____________________________________________________________________________
115 void AliITSUReconstructor::Reconstruct(TTree *digitsTree, TTree *clustersTree) const
117 // reconstruct clusters. If clustersTree is provided, write the tree
118 if (!digitsTree) return;
119 AliDebug(1,"ITSU Cluster finder (from digits tree) is initiated here \n");
121 // At the moment only pixel digits
122 TClonesArray *digArrPix = 0;
123 digitsTree->SetBranchAddress("ITSDigitsPix",&digArrPix);
125 // a new tree is created for each event: add each layer as separate branch
126 TBranch *lrBranch[fGeom->GetNLayers()];
128 for (int ilr=0;ilr<fGeom->GetNLayers();ilr++) {
130 if (clustersTree) { // do we write clusters tree?
131 int tp = fGeom->GetLayerDetTypeID(ilr)/AliITSUGeomTGeo::kMaxSegmPerDetType;
132 if (tp==AliITSUGeomTGeo::kDetTypePix) {
133 lrBranch[ilr] = clustersTree->Bronch(Form("ITSRecPoints%d",ilr),"TClonesArray",&fClusters[ilr]);
136 AliFatal(Form("Detector type %d is not defined",tp));
141 AliITSUClusterizer* clFinder = 0;
142 AliMagF* field = dynamic_cast<AliMagF*>(TGeoGlobalMagField::Instance()->GetField());
144 if (field == 0) AliError("Cannot get magnetic field from TGeoGlobalMagField");
145 else bz = field->SolenoidField();
146 const AliITSURecoParam* recPar = GetRecoParam();
148 for (int ilr=0;ilr<fGeom->GetNLayers();ilr++) {
150 fClusters[ilr]->Clear();
151 clFinder = (AliITSUClusterizer*)fClusterFinders[ilr];
152 clFinder->SetSegmentation((AliITSUSegmentationPix*)fGeom->GetSegmentation(ilr));
153 clFinder->SetLayerID(ilr);
154 clFinder->SetClusters(fClusters[ilr]);
155 clFinder->SetRecoParam(recPar); // RS: Do we need to set it for every event?
156 clFinder->SetAllowDiagonalClusterization(recPar->GetAllowDiagonalClusterization(ilr));
157 clFinder->PrepareLorentzAngleCorrection(bz);
159 int modF=fGeom->GetFirstModIndex(ilr);
160 int modL=fGeom->GetLastModIndex(ilr)+1;
161 for (int imod=modF;imod<modL;imod++) {
162 digitsTree->GetEntry(imod);
163 int ndig = digArrPix->GetEntries();
165 clFinder->SetVolID(imod);
166 clFinder->SetDigits(digArrPix);
167 clFinder->Clusterize();
170 AliITSUClusterPix::SetSortMode( AliITSUClusterPix::SortModeIdTrkYZ());
171 fClusters[ilr]->Sort();
172 AliDebug(1,Form(" -> Lr%d : %d Cluster",ilr,fClusters[ilr]->GetEntries()));
173 if (clustersTree) lrBranch[ilr]->Fill();
175 if (clustersTree) clustersTree->SetEntries();
179 //_____________________________________________________________________________
180 AliTracker* AliITSUReconstructor::CreateTracker() const
182 // create a ITS tracker
183 AliITSUTrackerGlo* tracker = new AliITSUTrackerGlo((AliITSUReconstructor*)this);
189 //_____________________________________________________________________________
190 AliVertexer* AliITSUReconstructor::CreateVertexer() const
192 // create a ITS vertexer
193 // to be implemented for the upgrade
195 AliDebug(1,"ITSU vertexer should be initiated here\n");
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));