X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;ds=sidebyside;f=TPC%2FAliBarrelRec_TPCparam.C;h=5bf2da2118594b1a012cc9856c7b2311f6aabddd;hb=66954e3fad591eabce414964d5d9768131a12462;hp=ba7be5316f12403b17ab283ecca8f3d9fc39ac9f;hpb=70521312e371b676a63b76ee7755a1e20e8e23f0;p=u%2Fmrichter%2FAliRoot.git

diff --git a/TPC/AliBarrelRec_TPCparam.C b/TPC/AliBarrelRec_TPCparam.C
index ba7be5316f1..5bf2da21185 100644
--- a/TPC/AliBarrelRec_TPCparam.C
+++ b/TPC/AliBarrelRec_TPCparam.C
@@ -1,455 +1,253 @@
-/****************************************************************************
- * This macro is supposed to do reconstruction in the ITS via Kalman        *
- * tracker V2. The ITStracker is feeded with parametrized TPC tracks        * 
- *                                                                          *
- * It does the following steps:                                             *
- *             1) TPC tracking parameterization                             *
- *             2) ITS cluster finding V2 (via fast points !)                *
- *             3) ITS track finding V2                                      *
- *             4) Create a reference file with simulation info (p,PDG...)   *
- *                                                                          *
- * (Origin: A.Dainese, Padova, andrea.dainese@pd,infn.it                    * 
- *  from AliBarrelReconstruction.C I.Belikov, CERN, Jouri.Belikov@cern.ch)  *
- ****************************************************************************/
-
-#ifndef __CINT__
-#include <iostream.h>
-#include <TFile.h>
-#include <TStopwatch.h>
-#include <TObject.h>
-#include "alles.h"
-#include "AliRun.h"
-#include "AliHeader.h"
-#include "AliGenEventHeader.h"
-#include "AliMagF.h"
-#include "AliModule.h"
-#include "AliArrayI.h"
-#include "AliDigits.h"
-#include "AliITS.h"
-#include "AliTPC.h"
-#include "AliITSgeom.h"
-#include "AliITSRecPoint.h"
-#include "AliITSclusterV2.h"
-#include "AliITSsimulationFastPoints.h"
-#include "AliITStrackerV2.h"
-#include "AliKalmanTrack.h"
-#include "AliTPCtrackerParam.h"
-#endif
-
-typedef struct {
-  Int_t lab;
-  Int_t pdg;
-  Int_t mumlab;
-  Int_t mumpdg;
-  Float_t Vx,Vy,Vz;
-  Float_t Px,Py,Pz;
-} RECTRACK;
-
-
-Int_t TPCParamTracks(const Char_t *galice,const Char_t *outname,const Int_t coll,const Double_t Bfield,Int_t n);
-Int_t ITSFindClusters(const Char_t *inname,const Char_t *outname,Int_t n);
-Int_t ITSFindTracks(const Char_t *galice,const Char_t *inname,const Char_t *inname2,const Char_t *outname,Int_t n);
-Int_t ITSMakeRefFile(const Char_t *galice, const Char_t *inname, const Char_t *outname, Int_t n);
-
-Int_t AliBarrelRec_TPCparam(Int_t n=1) {
-
-  const Char_t *name=" AliBarrelRec_TPCparam";
-  cerr<<'\n'<<name<<"...\n";
-  gBenchmark->Start(name);
-
-
-  const Char_t *TPCtrkNameS="AliTPCtracksParam.root";
-  const Char_t *galiceName="galice.root";
-  const Char_t *ITSclsName="AliITSclustersV2.root";
-  const Char_t *ITStrkName="AliITStracksV2.root";
-  const Char_t *ITSrefName="ITStracksRefFile.root";
-
-  // set here the code for the type of collision (needed for TPC tracking
-  // parameterization). available collisions:
+void AliBarrelRec_TPCparam(Int_t firstEvent=0,Int_t lastEvent=0) {
+  //
+  // Macro to create AliESDs.root using parametrized TPC tracking
+  // and AliITStrackerSA (MI + SA)
+  //
+  // Input files:
+  // - galice.root
+  // - Kinematics.root
+  // - TrackReferences.root
+  // - ITS.RecPoints.root (use AliRecontruction class)
+  // - ITS.Vertex.root (use $ALICE_ROOT/ITS/AliITSVertexerZTest.C)
+  //
+  // A. Dainese - INFN Legnaro
   //
-  // coll = 0 ->   PbPb6000 (HIJING with b<2fm) 
-  const Int_t    collcode = 0;  
-  // set here the value of the magnetic field
-  const Double_t BfieldValue = 0.4;
-
-
-
-  AliKalmanTrack::SetConvConst(100/0.299792458/BfieldValue);
 
 
-  // ********** Build TPC tracks with parameterization *********** //
-  if (TPCParamTracks(galiceName,TPCtrkNameS,collcode,BfieldValue,n)) {
-    cerr<<"Failed to get TPC hits !\n";
-    return 1;
-  }
- 
-  
-  // ********** Find ITS clusters *********** //
-  if (ITSFindClusters(galiceName,ITSclsName,n)) {
-    cerr<<"Failed to get ITS clusters !\n";
-    return 1;
-  }  
+  Int_t  collcode = 1; // pp collisions
+  Bool_t useMeanVtx = kFALSE;
   
+  AliGeomManager::LoadGeometry("geometry.root");
   
-  // ********* Find ITS tracks *********** //
-  if (ITSFindTracks(galiceName,TPCtrkNameS,ITSclsName,ITStrkName,n)) {
-    cerr<<"Failed to get ITS tracks !\n";
-    return 1;
-  } 
+  if (gAlice) {
+    delete gAlice->GetRunLoader();
+    delete gAlice; 
+    gAlice=0;
+  }
+  AliRunLoader *rl = AliRunLoader::Open("galice.root");
+  if (rl == 0x0) {
+    cerr<<"Can not open session"<<endl;
+    return;
+  }
+  Int_t retval = rl->LoadgAlice();
+  if (retval) {
+    cerr<<"LoadgAlice returned error"<<endl;
+    delete rl;
+    return;
+  }
+  retval = rl->LoadHeader();
+  if (retval) {
+    cerr<<"LoadHeader returned error"<<endl;
+    delete rl;
+    return;
+  }
+  gAlice=rl->GetAliRun();
   
   
-  // ********* Make ITS tracks reference file *********** //
-  if (ITSMakeRefFile(galiceName,ITStrkName,ITSrefName,n)) {
-    cerr<<"Failed to get ITS tracks ref file!\n";
-    return 1;
-  } 
   
-  gBenchmark->Stop(name);
-  gBenchmark->Show(name);
-
-  return 0;
-}
-
-
-Int_t TPCParamTracks(const Char_t *galice, const Char_t *outname,
-		     const Int_t coll,const Double_t Bfield,Int_t n) {
-
-  cerr<<"\n*******************************************************************\n";
-  Int_t rc;
-
-  const Char_t *name="TPCParamTracks";
-  cerr<<'\n'<<name<<"...\n";
-  gBenchmark->Start(name);
-
-  TFile *outfile=TFile::Open(outname,"recreate");
-  TFile *infile =TFile::Open(galice);
-
-  AliTPCtrackerParam tracker(coll,Bfield);
-  rc = tracker.BuildTPCtracks(infile,outfile,n);
-
-  delete gAlice; gAlice=0;
-
-  infile->Close();
-  outfile->Close();
-
-  gBenchmark->Stop(name);
-  gBenchmark->Show(name);
-
-  return rc;
-}
-
-Int_t ITSFindClusters(const Char_t *inname, const Char_t *outname, Int_t n) {
-
+  // Get field from galice.root
+  AliMagF *fiel = (AliMagF*)gAlice->Field();
+  Double_t fieval=TMath::Abs((Double_t)fiel->SolenoidField()/10.);
+  // Set the conversion constant between curvature and Pt
+  AliTracker::SetFieldMap(fiel,kTRUE);
   
-  cerr<<"\n*******************************************************************\n";
-
-  Int_t rc=0;
-  const Char_t *name="ITSFindClusters";
-  cerr<<'\n'<<name<<"...\n";
-  gBenchmark->Start(name);
-
- 
-  // delete reconstruction Tree if it's there
-  TFile *f =TFile::Open(inname,"update");
-  f->Delete("TreeR0;*");
-  f->Close();
-
-  TFile *out=TFile::Open(outname,"recreate");
-  TFile *in =TFile::Open(inname,"update");
+  /**** The TPC corner ********************/
   
-  if (!(gAlice=(AliRun*)in->Get("gAlice"))) {
-    cerr<<"Can't get gAlice !\n";
-    return 1;
-  }
+  AliTPCtrackerParam tpcTrackerPar(collcode,fieval);
+  tpcTrackerPar.Init();
   
+  //**** Switch on the PID class (mandatory!)
+  AliPID pid;
   
-  AliITS *ITS  = (AliITS*)gAlice->GetModule("ITS");
-  if (!ITS) { cerr<<"Can't get the ITS !\n"; return 1;}
-  AliITSgeom *geom=ITS->GetITSgeom();
-  out->cd();   
-  geom->Write();
+  /**** The ITS corner ********************/
   
-  Int_t ev=0;
-  for (ev = 0; ev<n; ev++){
-    in->cd();   // !!!! MI directory must point to galice. - othervise problem with Tree -connection
-    gAlice->GetEvent(ev);
-    //gAlice->TreeR()->Reset();   //reset reconstructed tree
+  AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader");
+  if (itsl == 0x0) {
+    cerr<<"Cannot get the ITS loader"<<endl;
+    return;
+  }
+  itsl->LoadRecPoints("read");
+  
+  AliITSRecoParam * itsRecoParam = AliITSRecoParam::GetLowFluxParam();
+  AliITSReconstructor::SetRecoParam(itsRecoParam);
+  
+  // Instance of the ITS tracker
+  AliITStrackerSA itsTracker(0);
+  Int_t ITSclusters[6] = {1,1,1,1,1,1};
+  itsTracker.SetLayersNotToSkip(ITSclusters);  
+  
+  // Primary vertex reconstruction in pp
+  AliESDVertex *initVertex = 0;
+  TFile *invtx = new TFile("AliESDVertexMean.root");
+  if(collcode==1 && useMeanVtx) {
+    // open the mean vertex
+    initVertex = (AliESDVertex*)invtx->Get("vtxmean");
+  } else {
+    Double_t pos[3]={0.5,0.5,0.}; 
+    Double_t err[3]={3.,3.,5.};
+    initVertex = new AliESDVertex(pos,err);
+  }
+  invtx->Close();
+  delete invtx;
+  AliVertexerTracks *vertexer = new AliVertexerTracks(AliTracker::GetBz());
+  vertexer->SetVtxStart(initVertex);
+  vertexer->SetDebug(0);
+  delete initVertex;
+  initVertex=0;
+  
+  /***** The TREE for ESD is born *****/
+  TTree *esdTree=new TTree("esdTree","Tree with ESD objects");
+  AliESDEvent *event=0; AliESDEvent *eventTPCin=0;
+  event = new AliESDEvent();
+  event->CreateStdContent();
+  event->WriteToTree(esdTree);
+  
+  if(firstEvent>rl->GetNumberOfEvents()) firstEvent=rl->GetNumberOfEvents()-1;
+  if(lastEvent>rl->GetNumberOfEvents())  lastEvent=rl->GetNumberOfEvents()-1;
+  cout<<" Number of events: "<<1+lastEvent-firstEvent<<endl;
+  
+  TFile *ppZ = TFile::Open("ITS.Vertex.root"); // z vertices from SPD
+  AliESDVertex *vertexSPD = new AliESDVertex();
+  Char_t zver[100];
+  Double_t vtx[3]={0,0,0};
+  Double_t sigmavtx[3]={0.07,0.07,0.1};
+
+
+  //<---------------------------------- The Loop over events begins
+  TStopwatch timer;
+  Int_t trc;
+  for(Int_t i=firstEvent; i<=lastEvent; i++) { 
     
-     
-    TTree *pTree=gAlice->TreeR();
-    if (!pTree){
-      gAlice->MakeTree("R");
-      pTree = gAlice->TreeR();
+    cout<<" Processing event number : "<<i<<endl;
+    //AliESDEvent *event = new AliESDEvent(); 
+    event->SetRunNumber(gAlice->GetRunNumber());
+    event->SetEventNumberInFile(i);
+    event->SetMagneticField(gAlice->Field()->SolenoidField());
+    rl->GetEvent(i);
+
+    //***** Primary vertex from SPD from file 
+    sprintf(zver,"Event%d/Vertex",i);
+    vertexSPD = (AliESDVertex*)ppZ->Get(zver);
+    if(!vertexSPD) {
+      esdTree->Fill(); event->Reset();
+      continue;
+    }      
+    event->SetVertex(vertexSPD);
+    vertexSPD->GetXYZ(vtx);
+    vertexSPD->GetSigmaXYZ(sigmavtx);
+
+    //***** TPC tracking
+    if ( (trc=tpcTrackerPar.BuildTPCtracks(event)) ) {
+      printf("exiting TPC tracker with code %d in event %d\n",trc,i);
+      esdTree->Fill(); event->Reset();
+      continue;
     }
-    TBranch *branch=pTree->GetBranch("ITSRecPoints");
-    if (!branch) {
-      //if not reconstructed ITS branch do reconstruction 
-      ITS->MakeBranch("R",0);
-      //////////////// Taken from ITSHitsToFastPoints.C ///////////////////////
-      for (Int_t i=0;i<3;i++) { 
-	ITS->SetSimulationModel(i,new AliITSsimulationFastPoints()); 
-      }
-      Int_t nsignal=25;
-      Int_t size=-1;
-      Int_t bgr_ev=Int_t(ev/nsignal);
-      ITS->HitsToFastRecPoints(ev,bgr_ev,size," ","All"," ");
-      ///////////////////////////////////////////////////////////////////////
-      gAlice->GetEvent(ev);   //MI comment  - in HitsToFast... they reset treeR to 0 
-      //they overwrite full reconstructed event ???? ... so lets connect TreeR one more
-      //time
+
+    // make a copy of the ESD at this stage
+    eventTPCin = event;
+
+    //***** ITS tracking
+    itsTracker.AliTracker::SetVertex(vtx,sigmavtx);
+    //    itsl->LoadRecPoints("read");
+    TTree *itsTree=itsl->TreeR();
+    if (!itsTree) {
+      cerr<<"Can't get the ITS cluster tree !\n";
+      esdTree->Fill(); event->Reset();
+      return;
+    }     
+    itsTracker.UnloadClusters();
+    itsTracker.LoadClusters(itsTree);
+    if ( (trc=itsTracker.Clusters2Tracks(event)) ) {
+      printf("exiting ITS tracker with code %d in event %d\n",trc,i);
+      esdTree->Fill(); event->Reset();
+      continue;
     }
 
+    // Bring kTPCin-tracks back to the TPC inner wall
+    BackToTPCInnerWall(event,eventTPCin);
 
-     
-    out->cd();
-    TClonesArray *clusters=new TClonesArray("AliITSclusterV2",10000);
-    char   cname[100];
-    sprintf(cname,"TreeC_ITS_%d",ev);
+    // refit inward in ITS:
+    // - refit without vertex constraint
+    // - propagate through beam pipe to local x = 0
+    itsTracker.RefitInward(event);
     
-    TTree *cTree=new TTree(cname,"ITS clusters");
-    cTree->Branch("Clusters",&clusters);
-     
-    pTree=gAlice->TreeR();
-    if (!pTree) { cerr<<"Can't get TreeR !\n"; return 1; }
-    branch=pTree->GetBranch("ITSRecPoints");
-    if (!branch) { cerr<<"Can't get ITSRecPoints branch !\n"; return 1;}
-    TClonesArray *points=new TClonesArray("AliITSRecPoint",10000);
-    branch->SetAddress(&points);
-     
-    TClonesArray &cl=*clusters;
-    Int_t nclusters=0;
-    Int_t nentr=(Int_t)pTree->GetEntries();
-    AliITSgeom *geom=ITS->GetITSgeom();
 
-    for (Int_t i=0; i<nentr; i++) {
-      if (!pTree->GetEvent(i)) {cTree->Fill(); continue;}
-      Int_t lay,lad,det; geom->GetModuleId(i,lay,lad,det);
-      Float_t x,y,zshift; geom->GetTrans(lay,lad,det,x,y,zshift); 
-      Double_t rot[9];    geom->GetRotMatrix(lay,lad,det,rot);
-      Double_t yshift = x*rot[0] + y*rot[1];
-      Int_t ndet=(lad-1)*geom->GetNdetectors(lay) + (det-1);
-      Int_t ncl=points->GetEntriesFast();
-      nclusters+=ncl;
-      Float_t lp[5];
-      Int_t lab[6]; 
-      for (Int_t j=0; j<ncl; j++) {
-	AliITSRecPoint *p=(AliITSRecPoint*)points->UncheckedAt(j);
-	lp[0]=-p->GetX()-yshift; if (lay==1) lp[0]=-lp[0];
-	lp[1]=p->GetZ()+zshift;
-	lp[2]=p->GetSigmaX2();
-	lp[3]=p->GetSigmaZ2();
-	lp[4]=p->GetQ();
-	lab[0]=p->GetLabel(0);lab[1]=p->GetLabel(1);lab[2]=p->GetLabel(2);
-	lab[3]=ndet;
-	
-	Int_t label=lab[0];
-	TParticle *part=(TParticle*)gAlice->Particle(label);
-	label=-3;
-	while (part->P() < 0.005) {
-	  Int_t m=part->GetFirstMother();
-	  if (m<0) {cerr<<"Primary momentum: "<<part->P()<<endl; break;}
-	  label=m;
-	  part=(TParticle*)gAlice->Particle(label);
-	}
-	if      (lab[1]<0) lab[1]=label;
-	else if (lab[2]<0) lab[2]=label;
-	else cerr<<"No empty labels !\n";
-	
-	new(cl[j]) AliITSclusterV2(lab,lp);
-      }
-      cTree->Fill(); clusters->Delete();
-      points->Delete();
+    //***** Vertex from ESD tracks
+    if(collcode==1) { // pp
+      AliESDVertex *vertexTrks = 
+	(AliESDVertex*)vertexer->FindPrimaryVertex(event);
+      event->SetPrimaryVertex(vertexTrks); 
     }
-    cTree->Write();
-    cerr<<"Number of clusters: "<<nclusters<<endl;
-    delete cTree; delete clusters; delete points;
     
-  }
+    esdTree->Fill();
+    event->Reset();
 
+  }//<-----------------------------------The Loop over events ends here
+  timer.Stop(); timer.Print();
   
-  delete gAlice; gAlice=0;
-  in->Close();
-  out->Close();
-  gBenchmark->Stop(name);
-  gBenchmark->Show(name);
- 
-  return rc;
-}
+  // The AliESDs.root is born
+  TFile *ef = TFile::Open("AliESDs.root","RECREATE"); 
+  if (!ef || !ef->IsOpen()) {cerr<<"Can't open AliESDs.root !\n"; return;}
 
-Int_t ITSFindTracks(const Char_t *galice, const Char_t * inname, 
-                    const Char_t *inname2, const Char_t *outname, 
-                    Int_t n) {
+  //Write the tree and close everything
+  esdTree->Write();
+  delete esdTree;
+  ef->Close();
 
-  
-  cerr<<"\n*******************************************************************\n";
+  delete vertexer;
+  delete rl;
 
-  Int_t rc=0;
-  const Char_t *name="ITSFindTracks";
-  cerr<<'\n'<<name<<"...\n";
-  gBenchmark->Start(name);
- 
-  
-  TFile *out=TFile::Open(outname,"recreate");
-  TFile *in =TFile::Open(inname);
-  TFile *in2 =TFile::Open(inname2);
-  
-  AliITSgeom *geom=(AliITSgeom*)gFile->Get("AliITSgeom");
-  if (!geom) { cerr<<"can't get ITS geometry !\n"; return 1;}
-
-  
-  for (Int_t ev=0; ev<n; ev++){
-    AliITStrackerV2 tracker(geom,ev);
-    
-    TArrayF o;
-    o.Set(3);
-    TFile* vtxFile = new TFile(galice);
-    vtxFile->cd();
-    AliHeader* header = 0;
-    TTree* treeE = (TTree*)gDirectory->Get("TE");
-    treeE->SetBranchAddress("Header",&header);
-    treeE->GetEntry(ev);
-    AliGenEventHeader* genHeader = header->GenEventHeader();
-    if(genHeader) {
-      // get primary vertex position
-      genHeader->PrimaryVertex(o);
-      vtxFile->Close();
-      delete header;
-    // set position of primary vertex
-      Double_t vtx[3];
-      vtx[0]=o[0]; vtx[1]=o[1]; vtx[2]=o[2];
-      cerr<<"+++\n+++ Reading primary vertex position from galice.root\n+++\n+++ Setting primary vertex z = "<<vtx[2]<<" cm for ITS tracking\n+++\n";
-      tracker.SetVertex(vtx);  
-    }else {
-      cerr<<"+++\n+++ Event header not found in galice.root:\n+++ Primary vertex in (0,0,0) [default]\n+++\n";
-    }    
-
-    // setup vertex constraint in the two tracking passes
-    Int_t flags[2];
-    flags[0]=1;
-    tracker.SetupFirstPass(flags);
-    flags[0]=0;
-    tracker.SetupSecondPass(flags);
-    
-    rc=tracker.Clusters2Tracks(in,out);
- 
-  }
-
-  delete gAlice;  gAlice=0;
-  in->Close();
-  in2->Close();
-  out->Close();
- 
-  gBenchmark->Stop(name);
-  gBenchmark->Show(name);
-  
-  return rc;
+  return;
 }
+//--------------------------------------------------------------------------
+void BackToTPCInnerWall(AliESDEvent *event,AliESDEvent *eventTPC) {
 
+  Int_t ntracks = eventTPC->GetNumberOfTracks();
+  AliESDtrack *esdTrackTPC = 0;
 
-Int_t ITSMakeRefFile(const Char_t *galice, const Char_t *inname, 
-		     const Char_t *outname, Int_t n) {
-
- 
-  cerr<<"\n*******************************************************************\n";
-
-  Int_t rc=0;
-  const Char_t *name="ITSMakeRefFile";
-  cerr<<'\n'<<name<<"...\n";
-  gBenchmark->Start(name);
-  
-  
-  TFile *out = TFile::Open(outname,"recreate");
-  TFile *trk = TFile::Open(inname);
-  TFile *kin = TFile::Open(galice);
-
-  
-  // Get gAlice object from file
-  if(!(gAlice=(AliRun*)kin->Get("gAlice"))) {
-    cerr<<"gAlice has not been found on galice.root !\n";
-    return 1;
+  // create relation between event and eventTPC
+  Int_t labelsTPC[100000000];
+  for(Int_t tr = 0; tr<ntracks; tr++) {
+    esdTrackTPC = (AliESDtrack*)event->GetTrack(tr);
+    labelsTPC[TMath::Abs(esdTrackTPC->GetLabel())] = tr;
   }
-  
-
- 
-  Int_t label;
-  TParticle *Part;  
-  TParticle *Mum;
-  static RECTRACK rectrk;
-  
-
-  for(Int_t event=0; event<n; event++){
-
-    AliITStrackV2 *itstrack=0;
-
-    gAlice->GetEvent(event);  
-
-    trk->cd();
 
-    // Tree with ITS tracks
-    char tname[100];
-    sprintf(tname,"TreeT_ITS_%d",event);
-
-    TTree *tracktree=(TTree*)trk->Get(tname);
-    TBranch *tbranch=tracktree->GetBranch("tracks");
-    Int_t nentr=(Int_t)tracktree->GetEntries();
-
-    // Tree for true track parameters
-    char ttname[100];
-    sprintf(ttname,"Tree_Ref_%d",event);
-    TTree *reftree = new TTree(ttname,"Tree with true track params");
-    reftree->Branch("rectracks",&rectrk,"lab/I:pdg:mumlab:mumpdg:Vx/F:Vy:Vz:Px:Py:Pz");
-
-    for (Int_t i=0; i<nentr; i++) {
-      itstrack=new AliITStrackV2;
-      tbranch->SetAddress(&itstrack);
-      tracktree->GetEvent(i);
-      label = TMath::Abs(itstrack->GetLabel());
-
-      Part = (TParticle*)gAlice->Particle(label);
-      rectrk.lab=label;
-      rectrk.pdg=Part->GetPdgCode();
-      rectrk.mumlab = Part->GetFirstMother();
-      if(Part->GetFirstMother()>=0) {
-	Mum = (TParticle*)gAlice->Particle(Part->GetFirstMother());
-	rectrk.mumpdg=Mum->GetPdgCode();
-      } else {
-	rectrk.mumpdg=-1;
-      }
-      rectrk.Vx=Part->Vx();
-      rectrk.Vy=Part->Vy();
-      rectrk.Vz=Part->Vz();
-      rectrk.Px=Part->Px();
-      rectrk.Py=Part->Py();
-      rectrk.Pz=Part->Pz();
-      
-      reftree->Fill();
-    }   
+  ntracks = event->GetNumberOfTracks();
+  AliESDtrack *esdTrack = 0;
+  esdTrackTPC = 0;
+  Int_t indexTPC;
+
+  // loop on tracks
+  for(tr = 0; tr<ntracks; tr++) {
+    esdTrack = (AliESDtrack*)event->GetTrack(tr);
+    // set to kITSout the tracks that don't have kTPCin
+    // (they've been found by AliITStrackerSA)
+    if(!(esdTrack->GetStatus()&AliESDtrack::kTPCin)) {
+      esdTrack->SetStatus(AliESDtrack::kITSout);
+      continue;
+    }
 
-    out->cd();
-    reftree->Write();
+    // skip tracks that don't have kITSin
+    if(!(esdTrack->GetStatus()&AliESDtrack::kITSin)) continue;
 
-  }
+    indexTPC = labelsTPC[TMath::Abs(esdTrack->GetLabel())];
+    esdTrackTPC = (AliESDtrack*)eventTPC->GetTrack(indexTPC);
 
-  trk->Close();
-  kin->Close();
-  out->Close();
-  
-  gBenchmark->Stop(name);
-  gBenchmark->Show(name);
-  
+    AliITStrackMI *itsTrack = 0;
+    try {
+      itsTrack = new AliITStrackMI(*esdTrackTPC);
+      esdTrack = 0;
+    }
+    catch (const Char_t *msg) {
+        Warning("ToTPCInnerWall",msg);
+        continue;
+    }
+    itsTrack->UpdateESDtrack(AliESDtrack::kITSout);
+    esdTrack = new AliESDtrack(*(itsTrack->GetESDtrack()));
 
-  return rc;
+    delete itsTrack;
+  } // end loop on tracks
 
+  return;
 }
-
-
-
-
-
-
-
-
-
-
-
-
+//--------------------------------------------------------------------------