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19 /// \file DecodeRecoCocktail.C
20 /// \brief add brief description
22 /// \author A. De Falco, H. Woehri, INFN Cagliari, July 2006
24 /// This macro reads the generation/reconstruction files in the
25 /// input directories (recodir and simdir),
26 /// builds a tree that contains, for each event, an array of muons and dimuons
27 /// (TClonesArrays of AliMUONTrackLight and AliMUONPairLight objects)
28 /// and writes the tree in an output file (outFileName)
29 /// Note that if the path for the output file is not explicitly specified,
30 /// it will be written in the directory containing the generation/reconstruction
31 /// 27-Nov-2006: modified by in order to loop on files
34 /// Updated this macro to work with new version of AliMUONRecoCheck. Also, we are
35 /// now fetching reconstructed track data from ESD and not the track tree, because
36 /// the AliMUONTrack objects for reconstructed tracks are no longer stored on disk.
37 /// - Artur Szostak <artursz@iafrica.com>
39 #if !defined(__CINT__) || defined(__MAKECINT__)
40 #include <Riostream.h>
41 #include <TClonesArray.h>
45 #include <TLorentzVector.h>
46 #include <TParticle.h>
48 #include <TGeoManager.h>
49 #include "AliMUONCDB.h"
50 #include "AliMUONRecoCheck.h"
51 #include "AliMUONTrack.h"
52 #include "AliMUONTrackLight.h"
53 #include "AliMUONPairLight.h"
54 #include "AliMUONVTrackStore.h"
55 #include "AliMUONTrackExtrap.h"
56 #include "AliESDEvent.h"
57 #include "AliESDVertex.h"
58 #include "AliMCEventHandler.h"
59 #include "AliMCEvent.h"
61 #include "AliCDBManager.h"
62 /*TODO: need to update this with changes made to ITS
63 #include "AliITSVertexerPPZ.h"
64 #include "AliITSLoader.h"
69 void DecodeRecoCocktail(
70 char* recodir=".", // The directory containing galice.root for reconstructed data.
71 char* simdir="generated/", // The directory containing galice.root for simulated data.
72 char* outFileName = "MuonLight.root", // The output filename containing AliMUONTrackLight and AliMUONPairLight objects.
73 char* geoFilename = "geometry.root" // The filename containing the geometry.
76 /// \param recodir The directory containing galice.root for reconstructed data.
77 /// \param simdir The directory containing galice.root for simulated data.
78 /// \param outFileName The output filename containing AliMUONTrackLight and AliMUONPairLight objects.
79 /// \param geoFilename The filename containing the geometry.
81 char startingDir[200];
82 sprintf (startingDir,"%s",gSystem->pwd());
85 TClonesArray *muonArray = new TClonesArray("AliMUONTrackLight",10);
86 TClonesArray *dimuonArray = new TClonesArray("AliMUONPairLight",10);
87 TTree *treeOut = new TTree("tree","tree");
89 TFile *fout = new TFile(outFileName,"recreate");
92 treeOut->Branch("muons",&muonArray);
93 treeOut->Branch("dimuons",&dimuonArray);
95 // Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
97 TGeoManager::Import(geoFilename);
99 Error("MUONmass_ESD", "getting geometry from file %s failed", geoFilename);
104 // load necessary data from OCDB
105 AliCDBManager::Instance()->SetDefaultStorage("local://$ALICE_ROOT/OCDB");
106 AliCDBManager::Instance()->SetRun(0);
107 if (!AliMUONCDB::LoadField()) return;
108 // set the magnetic field for track extrapolations
109 AliMUONTrackExtrap::SetField();
111 AliMUONRecoCheck *rc = new AliMUONRecoCheck("AliESDs.root", simdir);
112 Int_t nev = rc->NumberOfEvents();
114 /*TODO: need to update this with changes made to ITS
115 AliITSLoader* ITSloader = (AliITSLoader*) runLoaderSim->GetLoader("ITSLoader");
116 AliITSVertexerPPZ *dovert = 0;
118 dovert = new AliITSVertexerPPZ("default",0,0);
119 // dovert->SetDebug(0);
120 dovert->SetDiffPhiMax(0.05);
121 dovert->SetWindow(3.);
123 AliESDVertex *vert = 0;
128 for(Int_t ievent = 0; ievent < nev; ievent++){ // loop over events
130 /*TODO: need to update this with changes made to ITS
131 runLoaderSim->GetHeader();
133 vert = dovert->FindVertexForCurrentEvent(ievent);
137 //printf ("Event %d of %d\n",ievent,nev);
138 muonArray->Clear(); // clean muon and dimuon arrays
139 dimuonArray->Clear();
141 AliMUONVTrackStore* recoTracks = rc->ReconstructedTracks(ievent, kFALSE); // Use tracks from actual reconstruction.
142 //AliMUONVTrackStore* trackRefs = rc->ReconstructibleTracks(ievent); // Only use reconstructible reference tracks.
143 AliMUONVTrackStore* trackRefs = rc->TrackRefs(ievent);
144 AliStack* pstack = (const_cast<AliMCEventHandler*>(rc->GetMCEventHandler()))->MCEvent()->Stack();
146 TIter next(recoTracks->CreateIterator());
147 AliMUONTrack* trackReco = NULL;
149 Int_t nTrackReco = recoTracks->GetSize();
150 Int_t nTracksESD = rc->GetESDEvent()->GetNumberOfMuonTracks();
151 if (nTrackReco != nTracksESD) printf ("Tracks in recoTracks (%d) and in ESD (%d) do not match!\n", nTrackReco, nTracksESD);
152 Int_t nreftracks = 0;
154 while ( (trackReco = static_cast<AliMUONTrack*>(next())) != NULL )
156 // assign parameters concerning the reconstructed tracks
157 AliMUONTrackLight muLight;
159 muLight.FillFromESD(rc->GetESDEvent()->GetMuonTrack(itrRec));
160 // muLight.FillFromAliMUONTrack(trackReco);
162 // find the reference track and store further information
163 TParticle *part = muLight.FindRefTrack(trackReco, trackRefs, pstack);
165 v.SetPxPyPzE(part->Px(), part->Py(), part->Pz(), part->Energy());
167 muLight.FillMuonHistory(pstack, part);
168 // muLight.PrintInfo("A");
169 //store the referenced track in the muonArray:
170 TClonesArray &muons = *muonArray;
171 new (muons[nreftracks++]) AliMUONTrackLight(muLight);
177 // now loop over muon pairs to build dimuons
178 Int_t nmuons = muonArray->GetEntriesFast();
180 for(Int_t itrRec1 = 0; itrRec1 < nmuons-1; itrRec1++) {
181 AliMUONTrackLight* mu1 = (AliMUONTrackLight*) muonArray->At(itrRec1);
182 for(Int_t itrRec2 = itrRec1+1; itrRec2 < nmuons; itrRec2++){
183 AliMUONTrackLight* mu2 = (AliMUONTrackLight*) muonArray->At(itrRec2);
184 AliMUONPairLight dimuLight;
185 dimuLight.SetMuons(*mu1, *mu2);
186 TClonesArray &dimuons = *dimuonArray;
187 new (dimuons[ndimuons++]) AliMUONPairLight(dimuLight);
196 gSystem->cd(startingDir);