1 void AliBarrelRec_TPCparam(Int_t firstEvent=0,Int_t lastEvent=0) {
3 // Macro to create AliESDs.root using parametrized TPC tracking
4 // and AliITStrackerSA (MI + SA)
9 // - TrackReferences.root
10 // - ITS.RecPoints.root (use AliRecontruction class)
11 // - ITS.Vertex.root (use $ALICE_ROOT/ITS/AliITSVertexerZTest.C)
13 // A. Dainese - INFN Legnaro
16 Int_t collcode = 1; // pp collisions
17 Bool_t useMeanVtx = kFALSE;
21 delete gAlice->GetRunLoader();
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 AliITS *dITS = (AliITS*)gAlice->GetDetector("ITS");
71 cerr<<"Cannot find the ITS detector !"<<endl;
74 AliITSgeom *geom = dITS->GetITSgeom();
76 // Instance of the ITS tracker
77 AliITStrackerSA itsTracker(geom);
78 Int_t ITSclusters[6] = {1,1,1,1,1,1};
79 itsTracker.SetLayersNotToSkip(ITSclusters);
82 // Primary vertex reconstruction in pp
83 AliESDVertex *initVertex = 0;
84 TFile *invtx = new TFile("AliESDVertexMean.root");
85 if(collcode==1 && useMeanVtx) {
86 // open the mean vertex
87 initVertex = (AliESDVertex*)invtx->Get("vtxmean");
89 Double_t pos[3]={0.5,0.5,0.};
90 Double_t err[3]={3.,3.,5.};
91 initVertex = new AliESDVertex(pos,err);
95 AliVertexerTracks *vertexer = new AliVertexerTracks();
96 vertexer->SetVtxStart(initVertex);
97 vertexer->SetDebug(0);
101 /***** The TREE for ESD is born *****/
102 TTree *esdTree=new TTree("esdTree","Tree with ESD objects");
103 AliESD *event=0; AliESD *eventTPCin=0;
104 esdTree->Branch("ESD","AliESD",&event);
106 if(firstEvent>rl->GetNumberOfEvents()) firstEvent=rl->GetNumberOfEvents()-1;
107 if(lastEvent>rl->GetNumberOfEvents()) lastEvent=rl->GetNumberOfEvents()-1;
108 cout<<" Number of events: "<<1+lastEvent-firstEvent<<endl;
110 TFile *ppZ = TFile::Open("ITS.Vertex.root"); // z vertices from SPD
111 AliESDVertex *vertexSPD = new AliESDVertex();
113 Double_t vtx[3]={0,0,0};
114 Double_t sigmavtx[3]={0.07,0.07,0.1};
117 //<---------------------------------- The Loop over events begins
120 for(Int_t i=firstEvent; i<=lastEvent; i++) {
122 cout<<" Processing event number : "<<i<<endl;
123 AliESD *event = new AliESD();
124 event->SetRunNumber(gAlice->GetRunNumber());
125 event->SetEventNumber(i);
126 event->SetMagneticField(gAlice->Field()->SolenoidField());
129 //***** Primary vertex from SPD from file
130 sprintf(zver,"Event%d/Vertex",i);
131 vertexSPD = (AliESDVertex*)ppZ->Get(zver);
133 esdTree->Fill(); delete event;
136 event->SetVertex(vertexSPD);
137 vertexSPD->GetXYZ(vtx);
138 vertexSPD->GetSigmaXYZ(sigmavtx);
141 if ( (trc=tpcTrackerPar.BuildTPCtracks(event)) ) {
142 printf("exiting TPC tracker with code %d in event %d\n",trc,i);
143 esdTree->Fill(); delete event;
147 // make a copy of the ESD at this stage
151 itsTracker.AliTracker::SetVertex(vtx,sigmavtx);
152 TTree *itsTree=itsl->TreeR();
154 cerr<<"Can't get the ITS cluster tree !\n";
155 esdTree->Fill(); delete event;
158 itsTracker.UnloadClusters();
159 itsTracker.LoadClusters(itsTree);
160 if ( (trc=itsTracker.Clusters2Tracks(event)) ) {
161 printf("exiting ITS tracker with code %d in event %d\n",trc,i);
162 esdTree->Fill(); delete event;
166 // Bring kTPCin-tracks back to the TPC inner wall
167 BackToTPCInnerWall(event,eventTPCin);
169 // refit inward in ITS:
170 // - refit without vertex constraint
171 // - propagate through beam pipe to local x = 0
172 itsTracker.RefitInward(event);
175 //***** Vertex from ESD tracks
176 if(collcode==1) { // pp
177 AliESDVertex *vertexTrks =
178 (AliESDVertex*)vertexer->FindPrimaryVertex(event);
179 event->SetPrimaryVertex(vertexTrks);
185 }//<-----------------------------------The Loop over events ends here
186 timer.Stop(); timer.Print();
188 // The AliESDs.root is born
189 TFile *ef = TFile::Open("AliESDs.root","RECREATE");
190 if (!ef || !ef->IsOpen()) {cerr<<"Can't open AliESDs.root !\n"; return;}
192 //Write the tree and close everything
202 //--------------------------------------------------------------------------
203 void BackToTPCInnerWall(AliESD *event,AliESD *eventTPC) {
205 Int_t ntracks = eventTPC->GetNumberOfTracks();
206 AliESDtrack *esdTrackTPC = 0;
208 // create relation between event and eventTPC
209 Int_t labelsTPC[100000000];
210 for(Int_t tr = 0; tr<ntracks; tr++) {
211 esdTrackTPC = (AliESDtrack*)event->GetTrack(tr);
212 labelsTPC[TMath::Abs(esdTrackTPC->GetLabel())] = tr;
215 ntracks = event->GetNumberOfTracks();
216 AliESDtrack *esdTrack = 0;
221 for(tr = 0; tr<ntracks; tr++) {
222 esdTrack = (AliESDtrack*)event->GetTrack(tr);
223 // set to kITSout the tracks that don't have kTPCin
224 // (they've been found by AliITStrackerSA)
225 if(!(esdTrack->GetStatus()&AliESDtrack::kTPCin)) {
226 esdTrack->SetStatus(AliESDtrack::kITSout);
230 // skip tracks that don't have kITSin
231 if(!(esdTrack->GetStatus()&AliESDtrack::kITSin)) continue;
233 indexTPC = labelsTPC[TMath::Abs(esdTrack->GetLabel())];
234 esdTrackTPC = (AliESDtrack*)eventTPC->GetTrack(indexTPC);
236 AliITStrackMI *itsTrack = 0;
238 itsTrack = new AliITStrackMI(*esdTrackTPC);
241 catch (const Char_t *msg) {
242 Warning("ToTPCInnerWall",msg);
245 itsTrack->UpdateESDtrack(AliESDtrack::kITSout);
246 esdTrack = new AliESDtrack(*(itsTrack->GetESDtrack()));
249 } // end loop on tracks
253 //--------------------------------------------------------------------------