1 /// \file AliBarrelRec_TPCparam.C
2 /// \brief Macro to create AliESDs.root using parametrized TPC tracking and AliITStrackerSA (MI + SA)
7 /// - TrackReferences.root
8 /// - ITS.RecPoints.root (use AliRecontruction class)
9 /// - ITS.Vertex.root (use $ALICE_ROOT/ITS/AliITSVertexerZTest.C)
11 /// \author A. Dainese - INFN Legnaro
13 void AliBarrelRec_TPCparam(Int_t firstEvent=0,Int_t lastEvent=0) {
15 Int_t collcode = 1; // pp collisions
16 Bool_t useMeanVtx = kFALSE;
18 AliGeomManager::LoadGeometry("geometry.root");
21 delete AliRunLoader::Instance();
25 AliRunLoader *rl = AliRunLoader::Open("galice.root");
27 cerr<<"Can not open session"<<endl;
30 Int_t retval = rl->LoadgAlice();
32 cerr<<"LoadgAlice returned error"<<endl;
36 retval = rl->LoadHeader();
38 cerr<<"LoadHeader returned error"<<endl;
42 gAlice=rl->GetAliRun();
46 // Get field from galice.root
47 AliMagF *fiel = (AliMagF*)gAlice->Field();
48 Double_t fieval=TMath::Abs((Double_t)fiel->SolenoidField()/10.);
49 // Set the conversion constant between curvature and Pt
50 AliTracker::SetFieldMap(fiel,kTRUE);
52 /**** The TPC corner ********************/
54 AliTPCtrackerParam tpcTrackerPar(collcode,fieval);
57 //**** Switch on the PID class (mandatory!)
60 /**** The ITS corner ********************/
62 AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader");
64 cerr<<"Cannot get the ITS loader"<<endl;
67 itsl->LoadRecPoints("read");
69 AliITSRecoParam * itsRecoParam = AliITSRecoParam::GetLowFluxParam();
70 AliITSReconstructor::SetRecoParam(itsRecoParam);
72 // Instance of the ITS tracker
73 AliITStrackerSA itsTracker(0);
74 Int_t ITSclusters[6] = {1,1,1,1,1,1};
75 itsTracker.SetLayersNotToSkip(ITSclusters);
77 // Primary vertex reconstruction in pp
78 AliESDVertex *initVertex = 0;
79 TFile *invtx = new TFile("AliESDVertexMean.root");
80 if(collcode==1 && useMeanVtx) {
81 // open the mean vertex
82 initVertex = (AliESDVertex*)invtx->Get("vtxmean");
84 Double_t pos[3]={0.5,0.5,0.};
85 Double_t err[3]={3.,3.,5.};
86 initVertex = new AliESDVertex(pos,err);
90 AliVertexerTracks *vertexer = new AliVertexerTracks(AliTracker::GetBz());
91 vertexer->SetVtxStart(initVertex);
92 vertexer->SetDebug(0);
96 /***** The TREE for ESD is born *****/
97 TTree *esdTree=new TTree("esdTree","Tree with ESD objects");
98 AliESDEvent *event=0; AliESDEvent *eventTPCin=0;
99 event = new AliESDEvent();
100 event->CreateStdContent();
101 event->WriteToTree(esdTree);
103 if(firstEvent>rl->GetNumberOfEvents()) firstEvent=rl->GetNumberOfEvents()-1;
104 if(lastEvent>rl->GetNumberOfEvents()) lastEvent=rl->GetNumberOfEvents()-1;
105 cout<<" Number of events: "<<1+lastEvent-firstEvent<<endl;
107 TFile *ppZ = TFile::Open("ITS.Vertex.root"); // z vertices from SPD
108 AliESDVertex *vertexSPD = new AliESDVertex();
110 Double_t vtx[3]={0,0,0};
111 Double_t sigmavtx[3]={0.07,0.07,0.1};
114 //<---------------------------------- The Loop over events begins
117 for(Int_t i=firstEvent; i<=lastEvent; i++) {
119 cout<<" Processing event number : "<<i<<endl;
120 //AliESDEvent *event = new AliESDEvent();
121 event->SetRunNumber(gAlice->GetRunNumber());
122 event->SetEventNumberInFile(i);
123 event->SetMagneticField(gAlice->Field()->SolenoidField());
126 //***** Primary vertex from SPD from file
127 sprintf(zver,"Event%d/Vertex",i);
128 vertexSPD = (AliESDVertex*)ppZ->Get(zver);
130 esdTree->Fill(); event->Reset();
133 event->SetVertex(vertexSPD);
134 vertexSPD->GetXYZ(vtx);
135 vertexSPD->GetSigmaXYZ(sigmavtx);
138 if ( (trc=tpcTrackerPar.BuildTPCtracks(event)) ) {
139 printf("exiting TPC tracker with code %d in event %d\n",trc,i);
140 esdTree->Fill(); event->Reset();
144 // make a copy of the ESD at this stage
148 itsTracker.AliTracker::SetVertex(vtx,sigmavtx);
149 // itsl->LoadRecPoints("read");
150 TTree *itsTree=itsl->TreeR();
152 cerr<<"Can't get the ITS cluster tree !\n";
153 esdTree->Fill(); event->Reset();
156 itsTracker.UnloadClusters();
157 itsTracker.LoadClusters(itsTree);
158 if ( (trc=itsTracker.Clusters2Tracks(event)) ) {
159 printf("exiting ITS tracker with code %d in event %d\n",trc,i);
160 esdTree->Fill(); event->Reset();
164 // Bring kTPCin-tracks back to the TPC inner wall
165 BackToTPCInnerWall(event,eventTPCin);
167 // refit inward in ITS:
168 // - refit without vertex constraint
169 // - propagate through beam pipe to local x = 0
170 itsTracker.RefitInward(event);
173 //***** Vertex from ESD tracks
174 if(collcode==1) { // pp
175 AliESDVertex *vertexTrks =
176 (AliESDVertex*)vertexer->FindPrimaryVertex(event);
177 event->SetPrimaryVertex(vertexTrks);
183 }//<-----------------------------------The Loop over events ends here
184 timer.Stop(); timer.Print();
186 // The AliESDs.root is born
187 TFile *ef = TFile::Open("AliESDs.root","RECREATE");
188 if (!ef || !ef->IsOpen()) {cerr<<"Can't open AliESDs.root !\n"; return;}
190 //Write the tree and close everything
200 //--------------------------------------------------------------------------
201 void BackToTPCInnerWall(AliESDEvent *event,AliESDEvent *eventTPC) {
203 Int_t ntracks = eventTPC->GetNumberOfTracks();
204 AliESDtrack *esdTrackTPC = 0;
206 // create relation between event and eventTPC
207 Int_t labelsTPC[100000000];
208 for(Int_t tr = 0; tr<ntracks; tr++) {
209 esdTrackTPC = (AliESDtrack*)event->GetTrack(tr);
210 labelsTPC[TMath::Abs(esdTrackTPC->GetLabel())] = tr;
213 ntracks = event->GetNumberOfTracks();
214 AliESDtrack *esdTrack = 0;
219 for(tr = 0; tr<ntracks; tr++) {
220 esdTrack = (AliESDtrack*)event->GetTrack(tr);
221 // set to kITSout the tracks that don't have kTPCin
222 // (they've been found by AliITStrackerSA)
223 if(!(esdTrack->GetStatus()&AliESDtrack::kTPCin)) {
224 esdTrack->SetStatus(AliESDtrack::kITSout);
228 // skip tracks that don't have kITSin
229 if(!(esdTrack->GetStatus()&AliESDtrack::kITSin)) continue;
231 indexTPC = labelsTPC[TMath::Abs(esdTrack->GetLabel())];
232 esdTrackTPC = (AliESDtrack*)eventTPC->GetTrack(indexTPC);
234 AliITStrackMI *itsTrack = 0;
236 itsTrack = new AliITStrackMI(*esdTrackTPC);
239 catch (const Char_t *msg) {
240 Warning("ToTPCInnerWall",msg);
243 itsTrack->UpdateESDtrack(AliESDtrack::kITSout);
244 esdTrack = new AliESDtrack(*(itsTrack->GetESDtrack()));
247 } // end loop on tracks
251 //--------------------------------------------------------------------------