[u/mrichter/AliRoot.git] / TPC / AliTPCComparison.C

/// \file AliTPCComparison.C
/// \brief Very important, delicate and rather obscure macro
///
/// Creates list of "trackable" tracks, calculates efficiency, resolutions etc.
///
/// There is a possibility to run this macro over several events.
///
/// \author I.Belikov, CERN, Jouri.Belikov@cern.ch, M.Ivanov, GSI, m.ivanov@gsi.de

#if !defined(__CINT__) || defined(__MAKECINT__)
  #include <TMath.h>
  #include <TError.h>
  #include <Riostream.h>
  #include <TH1F.h>
  #include <TH2F.h>
  #include <TTree.h>
  #include <TParticle.h>
  #include <TCanvas.h>
  #include <TLine.h>
  #include <TText.h>
  #include <TBenchmark.h>
  #include <TStyle.h>
  #include <TFile.h>
  #include <TROOT.h>

  #include "AliStack.h"
  #include "AliHeader.h"
  #include "AliTrackReference.h"
  #include "AliRunLoader.h"
  #include "AliRun.h"
  #include "AliESDEvent.h"
  #include "AliESDtrack.h"

  #include "AliSimDigits.h"
  #include "AliTPC.h"
  #include "AliTPCParamSR.h"
  #include "AliTPCClustersArray.h"
  #include "AliTPCClustersRow.h"
  #include "AliTPCcluster.h"
  #include "AliTPCLoader.h"

  #include "AliCDBManager.h"
  #include "AliTPCcalibDB.h"
#endif

Int_t GoodTracksTPC(const Char_t *dir=".");

extern TBenchmark *gBenchmark;
extern TROOT *gROOT;

static Int_t allgood=0;
static Int_t allselected=0;
static Int_t allfound=0;

Int_t AliTPCComparison
(Float_t ptcutl=0.2, Float_t ptcuth=10., const Char_t *dir=".") {
   gBenchmark->Start("AliTPCComparison");

   ::Info("AliTPCComparison.C","Doing comparison...");


   TH1F *hp=(TH1F*)gROOT->FindObject("hp");
   if (!hp) hp=new TH1F("hp","PHI resolution",50,-20.,20.); 
   hp->SetFillColor(4);

   TH1F *hl=(TH1F*)gROOT->FindObject("hl");
   if (!hl) hl=new TH1F("hl","LAMBDA resolution",50,-20,20);
   hl->SetFillColor(4);

   TH1F *hpt=(TH1F*)gROOT->FindObject("hpt");
   if (!hpt) hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.); 
   hpt->SetFillColor(2);
 
   TH1F *hmpt=(TH1F*)gROOT->FindObject("hmpt");
   if (!hmpt) 
      hmpt=new TH1F("hmpt","Relative Pt resolution (pt>4GeV/c)",30,-60,60); 
   hmpt->SetFillColor(6);


   TH1F *hgood=(TH1F*)gROOT->FindObject("hgood");
   if (!hgood) hgood=new TH1F("hgood","Good tracks",30,0.2,6.1);
    
   TH1F *hfound=(TH1F*)gROOT->FindObject("hfound");
   if (!hfound) hfound=new TH1F("hfound","Found tracks",30,0.2,6.1);

   TH1F *hfake=(TH1F*)gROOT->FindObject("hfake");
   if (!hfake) hfake=new TH1F("hfake","Fake tracks",30,0.2,6.1);

   TH1F *hg=(TH1F*)gROOT->FindObject("hg");
   if (!hg) hg=new TH1F("hg","Efficiency for good tracks",30,0.2,6.1);
   hg->SetLineColor(4); hg->SetLineWidth(2);

   TH1F *hf=(TH1F*)gROOT->FindObject("hf");
   if (!hf) hf=new TH1F("hf","Efficiency for fake tracks",30,0.2,6.1);
   hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);

   TH1F *he=(TH1F*)gROOT->FindObject("he");
   if (!he) 
      he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,100.);

   TH2F *hep=(TH2F*)gROOT->FindObject("hep");
   if (!hep) hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,400.);
   hep->SetMarkerStyle(8);
   hep->SetMarkerSize(0.4);


   Char_t fname[100];
   sprintf(fname,"%s/GoodTracksTPC.root",dir);

   TFile *refFile=TFile::Open(fname,"old");
   if (!refFile || !refFile->IsOpen()) {
     ::Info("AliTPCComparison.C","Marking good tracks (will take a while)...");
     if (GoodTracksTPC(dir)) {
        ::Error("AliTPCComparison.C","Can't generate the reference file !");
        return 1;
     }
   }
   refFile=TFile::Open(fname,"old");
   if (!refFile || !refFile->IsOpen()) {
     ::Error("AliTPCComparison.C","Can't open the reference file !");
     return 2;
   }   
  
   TTree *tpcTree=(TTree*)refFile->Get("tpcTree");
   if (!tpcTree) {
     ::Error("AliTPCComparison.C","Can't get the reference tree !");
     return 3;
   }
   TBranch *branch=tpcTree->GetBranch("TPC");
   if (!branch) {
     ::Error("AliTPCComparison.C","Can't get the TPC branch !");
     return 4;
   }
   TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
   branch->SetAddress(&refs);


   sprintf(fname,"%s/AliESDs.root",dir);
   TFile *ef=TFile::Open(fname);
   if ((!ef)||(!ef->IsOpen())) {
      sprintf(fname,"%s/AliESDtpc.root",dir);
      ef=TFile::Open(fname);
      if ((!ef)||(!ef->IsOpen())) {
         ::Error("AliTPCComparison.C","Can't open AliESDtpc.root !");
         return 5;
      }
   }
   AliESDEvent* event = new AliESDEvent();
   TTree* esdTree = (TTree*) ef->Get("esdTree");
   if (!esdTree) {
      ::Error("AliTPCComparison.C", "no ESD tree found");
      return 6;
   }
   event->ReadFromTree(esdTree);


  // ******* Loop over events *********

   Int_t e=0;
   while (esdTree->GetEvent(e)) {
      cout<<endl<<endl<<"********* Processing event number: "<<e<<"*******\n";

      Int_t nentr=event->GetNumberOfTracks();
      allfound+=nentr;

      if (tpcTree->GetEvent(e++)==0) {
	 cerr<<"No reconstructable tracks !\n";
         continue;
      }

      Int_t ngood=refs->GetEntriesFast(); 
      allgood+=ngood;

      const Int_t MAX=15000;
    //MI change
      Int_t track_notfound[MAX], itrack_notfound=0;
      Int_t track_fake[MAX], itrack_fake=0;
      Int_t track_multifound[MAX],track_multifound_n[MAX],itrack_multifound=0;

      Int_t i;
      for (Int_t k=0; k<ngood; k++) {
	AliTrackReference *ref=(AliTrackReference*)refs->UncheckedAt(k); 
        Int_t lab=ref->Label(), tlab=-1;
        Float_t ptg=TMath::Sqrt(ref->Px()*ref->Px() + ref->Py()*ref->Py());

        if (ptg<1e-33) continue; // for those not crossing 0 pad row
  
        if (ptg<ptcutl) continue;
        if (ptg>ptcuth) continue;

        allselected++;

        hgood->Fill(ptg);

        AliESDtrack *track=0;
        for (i=0; i<nentr; i++) {
          track=event->GetTrack(i);
          tlab=track->GetTPCLabel();
          if (lab==TMath::Abs(tlab)) break;
        }
        if (i==nentr) {
	   track_notfound[itrack_notfound++]=lab;
           continue;
        }
      
        //MI change  - addition
        Int_t micount=0;
        Int_t mi;
        AliESDtrack * mitrack;
        for (mi=0; mi<nentr; mi++) {
	  mitrack=event->GetTrack(mi);          
	  if (lab==TMath::Abs(mitrack->GetTPCLabel())) micount++;
        }
        if (micount>1) {
	  track_multifound[itrack_multifound]=lab;
	  track_multifound_n[itrack_multifound]=micount;
	  itrack_multifound++;
        }
        if ((track->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
        if (lab==tlab) hfound->Fill(ptg);
        else { 
	  track_fake[itrack_fake++]=lab;
	  hfake->Fill(ptg); 
        }
      
        Double_t pxpypz[3]; track->GetInnerPxPyPz(pxpypz);
        Float_t phi=TMath::ATan2(pxpypz[1],pxpypz[0]);
        if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
        if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
        Double_t pt=TMath::Sqrt(pxpypz[0]*pxpypz[0]+pxpypz[1]*pxpypz[1]);
        Float_t lam=TMath::ATan2(pxpypz[2],pt); 
        Float_t pt_1=1/pt;

        Int_t pdg=(Int_t)ref->GetLength();  //this is particle's PDG !

        if (TMath::Abs(pdg)==11 && ptg>4.) {//high momentum electrons
           hmpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
        } else {
           Float_t phig=TMath::ATan2(ref->Py(),ref->Px());
           hp->Fill((phi - phig)*1000.);

           Float_t lamg=TMath::ATan2(ref->Pz(),ptg);
           hl->Fill((lam - lamg)*1000.);

           hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
        }

        Float_t mom=pt/TMath::Cos(lam);
        Float_t dedx=track->GetTPCsignal();
        hep->Fill(mom,dedx,1.);
        if (TMath::Abs(pdg)==211) //pions
	   if (mom>0.4 && mom<0.5) {
              he->Fill(dedx,1.);
           }
      }

      cout<<"\nList of Not found tracks :\n";
      for ( i = 0; i< itrack_notfound; i++){
        cout<<track_notfound[i]<<"\t";
        if ((i%5)==4) cout<<"\n";
      }
      cout<<"\nList of fake  tracks :\n";
      for ( i = 0; i< itrack_fake; i++){
        cout<<track_fake[i]<<"\t";
        if ((i%5)==4) cout<<"\n";
      }
      cout<<"\nList of multiple found tracks :\n";
      for ( i=0; i<itrack_multifound; i++) {
          cout<<"id.   "<<track_multifound[i]
              <<"     found - "<<track_multifound_n[i]<<"times\n";
      }

      cout<<"Number of found tracks ="<<nentr<<endl;
      cout<<"Number of \"good\" tracks ="<<ngood<<endl;

      refs->Clear();
  }// ***** End of the loop over events

   delete event;
   delete esdTree;
   ef->Close();

   delete tpcTree;
   refFile->Close();

   Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
   if (ng!=0) cout<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
   cout<<"Total number selected of \"good\" tracks ="<<allselected<<endl<<endl;
   cout<<"Total number of found tracks ="<<allfound<<endl;
   cout<<"Total number of \"good\" tracks ="<<allgood<<endl;
   cout<<endl;

   gStyle->SetOptStat(111110);
   gStyle->SetOptFit(1);

   TCanvas *c1=new TCanvas("c1","",0,0,700,850);

   Int_t minc=33; 

   TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
   p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10); 
   hp->SetFillColor(4);  hp->SetXTitle("(mrad)"); 
   if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); c1->cd();

   TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw(); 
   p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
   hl->SetXTitle("(mrad)");
   if (hl->GetEntries()<minc) hl->Draw(); else hl->Fit("gaus"); c1->cd();

   TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
   p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10); 
   hpt->SetXTitle("(%)");
   if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); c1->cd();

   TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
   p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
   hmpt->SetXTitle("(%)");
   if (hmpt->GetEntries()<minc) hmpt->Draw(); else hmpt->Fit("gaus"); c1->cd();

   TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd(); 
   p5->SetFillColor(41); p5->SetFrameFillColor(10);
   hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
   hg->Divide(hfound,hgood,1,1.,"b");
   hf->Divide(hfake,hgood,1,1.,"b");
   hg->SetMaximum(1.4);
   hg->SetYTitle("Tracking efficiency");
   hg->SetXTitle("Pt (GeV/c)");
   hg->Draw();

   TLine *line1 = new TLine(0.1,1.0,6.1,1.0); line1->SetLineStyle(4);
   line1->Draw("same");
   TLine *line2 = new TLine(0.1,0.9,6.1,0.9); line2->SetLineStyle(4);
   line2->Draw("same");

   hf->SetFillColor(1);
   hf->SetFillStyle(3013);
   hf->SetLineColor(2);
   hf->SetLineWidth(2);
   hf->Draw("histsame");
   TText *text = new TText(0.461176,0.248448,"Fake tracks");
   text->SetTextSize(0.05);
   text->Draw();
   text = new TText(0.453919,1.11408,"Good tracks");
   text->SetTextSize(0.05);
   text->Draw();


   TCanvas *c2=new TCanvas("c2","",320,32,530,590);

   TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
   p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10); 
   he->SetFillColor(2); he->SetFillStyle(3005);  
   he->SetXTitle("Arbitrary Units"); 
   if (he->GetEntries()<minc) he->Draw(); else he->Fit("gaus"); c2->cd();

   TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw(); 
   p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
   hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)"); 
   hep->Draw(); c1->cd();

   TFile fc("AliTPCComparison.root","RECREATE");
   c1->Write();
   c2->Write();
   fc.Close();

   gBenchmark->Stop("AliTPCComparison");
   gBenchmark->Show("AliTPCComparison");

   return 0;
}


Int_t GoodTracksTPC(const Char_t *dir) {
   Char_t fname[100];
   sprintf(fname,"%s/galice.root",dir);

   AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON");
   if (!rl) {
      ::Error("GoodTracksTPC","Can't start session !");
      return 1;
   }

   rl->LoadgAlice();
   rl->LoadHeader();
   rl->LoadKinematics();
   rl->LoadTrackRefs();

   AliTPCLoader *tpcl = (AliTPCLoader *)rl->GetLoader("TPCLoader");
   if (tpcl == 0x0) {
      ::Error("GoodTracksTPC","Can not find TPCLoader !");
      delete rl;
      return 2;
   }
      
   AliTPC *TPC=(AliTPC*)rl->GetAliRun()->GetDetector("TPC");
   Int_t ver = TPC->IsVersion(); 
   cout<<"TPC version "<<ver<<" has been found !\n";
   if (ver==1) tpcl->LoadRecPoints();
   else if (ver==2) tpcl->LoadDigits();
   else {
      ::Error("GoodTracksTPC","Wrong TPC version !");
      delete rl;
      return 3;
   } 


   AliCDBManager *man=AliCDBManager::Instance();
   man->SetDefaultStorage("local://$ALICE_ROOT/OCDB");
   man->SetRun(0);
   AliTPCParamSR *digp=
   (AliTPCParamSR*)(AliTPCcalibDB::Instance()->GetParameters());
   if (!digp) { 
     ::Error("AliTPCComparison.C","TPC parameters have not been found !");
     delete rl;
     return 4; 
   }

   Int_t nrow_up=digp->GetNRowUp();
   Int_t nrows=digp->GetNRowLow()+nrow_up;
   Int_t zero=digp->GetZeroSup();
   Int_t gap=Int_t(0.125*nrows), shift=Int_t(0.5*gap);
   Int_t good_number=Int_t(0.4*nrows);

   Int_t nev=rl->GetNumberOfEvents();
   ::Info("GoodTracksTPC","Number of events : %d\n",nev);  


   sprintf(fname,"%s/GoodTracksTPC.root",dir);
   TFile *file=TFile::Open(fname,"recreate");

   TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
   TTree tpcTree("tpcTree","Tree with info about the reconstructable TPC tracks");
   tpcTree.Branch("TPC",&refs);

   //********  Loop over generated events 
   for (Int_t e=0; e<nev; e++) {
     Int_t nt=0;
     refs->Clear();

     Int_t i;

     rl->GetEvent(e);  file->cd();

     Int_t np = rl->GetHeader()->GetNtrack();
     cout<<"Event "<<e<<" Number of particles: "<<np<<endl;

     //******** Fill the "good" masks
     Int_t *good=new Int_t[np]; for (i=0; i<np; i++) good[i]=0;
     switch (ver) {
     case 1:
        {
        AliTPCClustersArray *pca=new AliTPCClustersArray, &ca=*pca;
        ca.Setup(digp);
        ca.SetClusterType("AliTPCcluster");
        ca.ConnectTree(tpcl->TreeR());
        Int_t nrows=Int_t(ca.GetTree()->GetEntries());
        for (Int_t n=0; n<nrows; n++) {
          AliSegmentID *s=ca.LoadEntry(n);
          Int_t sec,row;
          digp->AdjustSectorRow(s->GetID(),sec,row);
          AliTPCClustersRow &clrow = *ca.GetRow(sec,row);
          Int_t ncl=clrow.GetArray()->GetEntriesFast();
          while (ncl--) {
              AliTPCcluster *c=(AliTPCcluster*)clrow[ncl];
              Int_t lab=c->GetLabel(0);
              if (lab<0) continue; //noise cluster
              lab=TMath::Abs(lab);

              if (sec>=digp->GetNInnerSector())
                 if (row==nrow_up-1) good[lab]|=0x4000;
              if (sec>=digp->GetNInnerSector())
                 if (row==nrow_up-1-gap) good[lab]|=0x1000;

              if (sec>=digp->GetNInnerSector())
                 if (row==nrow_up-1-shift) good[lab]|=0x2000;
              if (sec>=digp->GetNInnerSector())
                 if (row==nrow_up-1-gap-shift) good[lab]|=0x800;

              good[lab]++;
          }
          ca.ClearRow(sec,row);
        }
        delete pca;
        }
        break;
     case 2:
        {
        TTree *TD=tpcl->TreeD();
      
        AliSimDigits da, *digits=&da;
        TD->GetBranch("Segment")->SetAddress(&digits);

        Int_t *count = new Int_t[np];
        Int_t i;
        for (i=0; i<np; i++) count[i]=0;

        Int_t sectors_by_rows=(Int_t)TD->GetEntries();
        for (i=0; i<sectors_by_rows; i++) {
          if (!TD->GetEvent(i)) continue;
          Int_t sec,row;
          digp->AdjustSectorRow(digits->GetID(),sec,row);
	  //cerr<<sec<<' '<<row<<'\r';
          digits->First();
          do { //Many thanks to J.Chudoba who noticed this
              Int_t it=digits->CurrentRow(), ip=digits->CurrentColumn();
              Short_t dig = digits->GetDigit(it,ip);
              Int_t idx0=digits->GetTrackID(it,ip,0); 
              Int_t idx1=digits->GetTrackID(it,ip,1);
              Int_t idx2=digits->GetTrackID(it,ip,2);
              if (idx0>=0 && dig>=zero && idx0<np) count[idx0]+=1;
              if (idx1>=0 && dig>=zero && idx1<np) count[idx1]+=1;
              if (idx2>=0 && dig>=zero && idx2<np) count[idx2]+=1;
          } while (digits->Next());
          for (Int_t j=0; j<np; j++) {
              if (count[j]>1) {
                 if (sec>=digp->GetNInnerSector())
		   if (row==nrow_up-1    ) good[j]|=0x4000;
                 if (sec>=digp->GetNInnerSector())
		   if (row==nrow_up-1-gap) good[j]|=0x1000;

                 if (sec>=digp->GetNInnerSector())
		   if (row==nrow_up-1-shift) good[j]|=0x2000;
                 if (sec>=digp->GetNInnerSector())
		   if (row==nrow_up-1-gap-shift) good[j]|=0x800;
                 good[j]++;
              }
              count[j]=0;
          }
        }
        delete[] count;
        }
        break;
     }


     //****** select tracks which are "good" enough
     AliStack* stack = rl->Stack();
     for (i=0; i<np; i++) {
        if ((good[i]&0x5000) != 0x5000)
        if ((good[i]&0x2800) != 0x2800) continue;
        if ((good[i]&0x7FF ) < good_number) continue;

        TParticle *p = (TParticle*)stack->Particle(i);
        if (p == 0x0) {
         cerr<<"Can not get particle "<<i<<endl;
         continue;
        }
        if (p->Pt()<0.100) continue;
        if (TMath::Abs(p->Pz()/p->Pt())>0.999) continue;

        Double_t vx=p->Vx(),vy=p->Vy(),vz=p->Vz();
        if (TMath::Sqrt(vx*vx+vy*vy)>3.5) continue;
        if (TMath::Abs(vz) > 50.) continue;

        AliTrackReference *ref=new((*refs)[nt]) AliTrackReference();

        ref->SetLabel(i);
        Int_t pdg=p->GetPdgCode();
        ref->SetLength(pdg);  //This will the particle's PDG !
        ref->SetMomentum(0.,0.,0.);  
        ref->SetPosition(0.,0.,0.);

        nt++;
     }

     //**** check if there is also information at the entrance of the TPC
     TTree *TR=rl->TreeTR();
     TBranch *branch=TR->GetBranch("TrackReferences");
     if (branch==0) {
        ::Error("GoodTracksTPC","No track references !");
        delete rl;
        return 5;
     }
     TClonesArray tpcdummy("AliTrackReference",1000), *tpcRefs=&tpcdummy;
     branch->SetAddress(&tpcRefs);
     Int_t nr=(Int_t)TR->GetEntries();
     for (Int_t r=0; r<nr; r++) {
         //cerr<<r<<' '<<nr<<'\r';
         TR->GetEvent(r);

	 Int_t nref = tpcRefs->GetEntriesFast();
         if (!nref) continue;
         AliTrackReference *tpcRef= 0x0;	 
	 for (Int_t iref=0; iref<nref; ++iref) {
	   tpcRef = (AliTrackReference*)tpcRefs->UncheckedAt(iref);
	   if (tpcRef->DetectorId() == AliTrackReference::kTPC) break;
	   tpcRef = 0x0;
	 }

	 if (!tpcRef) continue;

         Int_t j;
	 AliTrackReference *ref=0;
         for (j=0; j<nt; j++) {
	   ref=(AliTrackReference *)refs->UncheckedAt(j);
           if (ref->Label()==tpcRef->Label()) break;
           ref=0;
	 }  
         if (ref==0) continue;

         ref->SetMomentum(tpcRef->Px(),tpcRef->Py(),tpcRef->Pz());
         ref->SetPosition(tpcRef->LocalX(),tpcRef->LocalY(),tpcRef->Z());

	 tpcRefs->Clear();
     }

     tpcTree.Fill();

     delete[] good;
   } //****** end of the loop over generated events

   
   tpcTree.Write();
   file->Close();

   delete rl;
   return 0;
}
Commit	Line	Data
a7a1dd76	1	/// \file AliTPCComparison.C
	2	/// \brief Very important, delicate and rather obscure macro
	3	///
	4	/// Creates list of "trackable" tracks, calculates efficiency, resolutions etc.
	5	///
	6	/// There is a possibility to run this macro over several events.
	7	///
	8	/// \author I.Belikov, CERN, Jouri.Belikov@cern.ch, M.Ivanov, GSI, m.ivanov@gsi.de
7f6ddf58	9
c630aafd	10	#if !defined(__CINT__) \|\| defined(__MAKECINT__)
5102bab6	11	#include <TMath.h>
	12	#include <TError.h>
	13	#include <Riostream.h>
	14	#include <TH1F.h>
	15	#include <TH2F.h>
	16	#include <TTree.h>
	17	#include <TParticle.h>
5102bab6	18	#include <TCanvas.h>
	19	#include <TLine.h>
	20	#include <TText.h>
	21	#include <TBenchmark.h>
	22	#include <TStyle.h>
8b462fd8	23	#include <TFile.h>
bf018fe4	24	#include <TROOT.h>
5102bab6	25
	26	#include "AliStack.h"
	27	#include "AliHeader.h"
	28	#include "AliTrackReference.h"
88cb7938	29	#include "AliRunLoader.h"
c630aafd	30	#include "AliRun.h"
4514157e	31	#include "AliESDEvent.h"
fc023202	32	#include "AliESDtrack.h"
5102bab6	33
	34	#include "AliSimDigits.h"
	35	#include "AliTPC.h"
	36	#include "AliTPCParamSR.h"
	37	#include "AliTPCClustersArray.h"
	38	#include "AliTPCClustersRow.h"
bf018fe4	39	#include "AliTPCcluster.h"
5102bab6	40	#include "AliTPCLoader.h"
36bd09c9	41
	42	#include "AliCDBManager.h"
	43	#include "AliTPCcalibDB.h"
be9c5115	44	#endif
be9c5115	45
4fa1e629	46	Int_t GoodTracksTPC(const Char_t *dir=".");
88cb7938	47
5102bab6	48	extern TBenchmark *gBenchmark;
bf018fe4	49	extern TROOT *gROOT;
fbb58996	50
4fa1e629	51	static Int_t allgood=0;
	52	static Int_t allselected=0;
	53	static Int_t allfound=0;
	54
	55	Int_t AliTPCComparison
	56	(Float_t ptcutl=0.2, Float_t ptcuth=10., const Char_t *dir=".") {
5102bab6	57	gBenchmark->Start("AliTPCComparison");
	58
	59	::Info("AliTPCComparison.C","Doing comparison...");
c630aafd	60
88cb7938	61
bf018fe4	62
	63	TH1F hp=(TH1F)gROOT->FindObject("hp");
	64	if (!hp) hp=new TH1F("hp","PHI resolution",50,-20.,20.);
	65	hp->SetFillColor(4);
	66
	67	TH1F hl=(TH1F)gROOT->FindObject("hl");
	68	if (!hl) hl=new TH1F("hl","LAMBDA resolution",50,-20,20);
	69	hl->SetFillColor(4);
	70
	71	TH1F hpt=(TH1F)gROOT->FindObject("hpt");
	72	if (!hpt) hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
	73	hpt->SetFillColor(2);
	74
	75	TH1F hmpt=(TH1F)gROOT->FindObject("hmpt");
	76	if (!hmpt)
	77	hmpt=new TH1F("hmpt","Relative Pt resolution (pt>4GeV/c)",30,-60,60);
cc80f89e	78	hmpt->SetFillColor(6);
8c555625	79
bf018fe4	80
	81
	82	TH1F hgood=(TH1F)gROOT->FindObject("hgood");
	83	if (!hgood) hgood=new TH1F("hgood","Good tracks",30,0.2,6.1);
	84
	85	TH1F hfound=(TH1F)gROOT->FindObject("hfound");
	86	if (!hfound) hfound=new TH1F("hfound","Found tracks",30,0.2,6.1);
	87
	88	TH1F hfake=(TH1F)gROOT->FindObject("hfake");
	89	if (!hfake) hfake=new TH1F("hfake","Fake tracks",30,0.2,6.1);
	90
	91	TH1F hg=(TH1F)gROOT->FindObject("hg");
	92	if (!hg) hg=new TH1F("hg","Efficiency for good tracks",30,0.2,6.1);
8c555625	93	hg->SetLineColor(4); hg->SetLineWidth(2);
bf018fe4	94
	95	TH1F hf=(TH1F)gROOT->FindObject("hf");
	96	if (!hf) hf=new TH1F("hf","Efficiency for fake tracks",30,0.2,6.1);
8c555625	97	hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
8c555625	98
bf018fe4	99	TH1F he=(TH1F)gROOT->FindObject("he");
	100	if (!he)
	101	he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,100.);
	102
	103	TH2F hep=(TH2F)gROOT->FindObject("hep");
	104	if (!hep) hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,400.);
be9c5115	105	hep->SetMarkerStyle(8);
be9c5115	106	hep->SetMarkerSize(0.4);
8c555625	107
4fa1e629	108
	109	Char_t fname[100];
	110	sprintf(fname,"%s/GoodTracksTPC.root",dir);
	111
	112	TFile *refFile=TFile::Open(fname,"old");
	113	if (!refFile \|\| !refFile->IsOpen()) {
	114	::Info("AliTPCComparison.C","Marking good tracks (will take a while)...");
	115	if (GoodTracksTPC(dir)) {
	116	::Error("AliTPCComparison.C","Can't generate the reference file !");
	117	return 1;
	118	}
	119	}
	120	refFile=TFile::Open(fname,"old");
	121	if (!refFile \|\| !refFile->IsOpen()) {
	122	::Error("AliTPCComparison.C","Can't open the reference file !");
	123	return 2;
	124	}
	125
	126	TTree tpcTree=(TTree)refFile->Get("tpcTree");
	127	if (!tpcTree) {
	128	::Error("AliTPCComparison.C","Can't get the reference tree !");
	129	return 3;
	130	}
	131	TBranch *branch=tpcTree->GetBranch("TPC");
	132	if (!branch) {
	133	::Error("AliTPCComparison.C","Can't get the TPC branch !");
	134	return 4;
	135	}
	136	TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
	137	branch->SetAddress(&refs);
	138
	139
	140	sprintf(fname,"%s/AliESDs.root",dir);
	141	TFile *ef=TFile::Open(fname);
	142	if ((!ef)\|\|(!ef->IsOpen())) {
	143	sprintf(fname,"%s/AliESDtpc.root",dir);
	144	ef=TFile::Open(fname);
	145	if ((!ef)\|\|(!ef->IsOpen())) {
	146	::Error("AliTPCComparison.C","Can't open AliESDtpc.root !");
	147	return 5;
	148	}
	149	}
4514157e	150	AliESDEvent* event = new AliESDEvent();
8b462fd8	151	TTree* esdTree = (TTree*) ef->Get("esdTree");
	152	if (!esdTree) {
	153	::Error("AliTPCComparison.C", "no ESD tree found");
	154	return 6;
	155	}
4514157e	156	event->ReadFromTree(esdTree);
4fa1e629	157
4fa1e629	158
a7a1dd76	159	// ***** Loop over events *******
a7a1dd76	160
4fa1e629	161	Int_t e=0;
8b462fd8	162	while (esdTree->GetEvent(e)) {
4fa1e629	163	cout<<endl<<endl<<"******* Processing event number: "<<e<<"*****\n";
4fa1e629	164
4fa1e629	165	Int_t nentr=event->GetNumberOfTracks();
	166	allfound+=nentr;
	167
	168	if (tpcTree->GetEvent(e++)==0) {
	169	cerr<<"No reconstructable tracks !\n";
	170	continue;
	171	}
	172
	173	Int_t ngood=refs->GetEntriesFast();
	174	allgood+=ngood;
	175
	176	const Int_t MAX=15000;
	177	//MI change
	178	Int_t track_notfound[MAX], itrack_notfound=0;
	179	Int_t track_fake[MAX], itrack_fake=0;
	180	Int_t track_multifound[MAX],track_multifound_n[MAX],itrack_multifound=0;
	181
	182	Int_t i;
	183	for (Int_t k=0; k<ngood; k++) {
	184	AliTrackReference ref=(AliTrackReference)refs->UncheckedAt(k);
	185	Int_t lab=ref->Label(), tlab=-1;
	186	Float_t ptg=TMath::Sqrt(ref->Px()ref->Px() + ref->Py()ref->Py());
	187
	188	if (ptg<1e-33) continue; // for those not crossing 0 pad row
	189
	190	if (ptg<ptcutl) continue;
	191	if (ptg>ptcuth) continue;
	192
	193	allselected++;
	194
	195	hgood->Fill(ptg);
	196
	197	AliESDtrack *track=0;
	198	for (i=0; i<nentr; i++) {
bf018fe4	199	track=event->GetTrack(i);
162085b7	200	tlab=track->GetTPCLabel();
cc80f89e	201	if (lab==TMath::Abs(tlab)) break;
4fa1e629	202	}
	203	if (i==nentr) {
	204	track_notfound[itrack_notfound++]=lab;
	205	continue;
	206	}
	207
	208	//MI change - addition
	209	Int_t micount=0;
	210	Int_t mi;
	211	AliESDtrack * mitrack;
	212	for (mi=0; mi<nentr; mi++) {
	213	mitrack=event->GetTrack(mi);
	214	if (lab==TMath::Abs(mitrack->GetTPCLabel())) micount++;
	215	}
	216	if (micount>1) {
	217	track_multifound[itrack_multifound]=lab;
	218	track_multifound_n[itrack_multifound]=micount;
	219	itrack_multifound++;
	220	}
	221	if ((track->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
	222	if (lab==tlab) hfound->Fill(ptg);
	223	else {
	224	track_fake[itrack_fake++]=lab;
	225	hfake->Fill(ptg);
	226	}
cf98c13f	227
4fa1e629	228	Double_t pxpypz[3]; track->GetInnerPxPyPz(pxpypz);
	229	Float_t phi=TMath::ATan2(pxpypz[1],pxpypz[0]);
	230	if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
	231	if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
	232	Double_t pt=TMath::Sqrt(pxpypz[0]pxpypz[0]+pxpypz[1]pxpypz[1]);
	233	Float_t lam=TMath::ATan2(pxpypz[2],pt);
	234	Float_t pt_1=1/pt;
	235
	236	Int_t pdg=(Int_t)ref->GetLength(); //this is particle's PDG !
	237
	238	if (TMath::Abs(pdg)==11 && ptg>4.) {//high momentum electrons
	239	hmpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
	240	} else {
	241	Float_t phig=TMath::ATan2(ref->Py(),ref->Px());
	242	hp->Fill((phi - phig)*1000.);
	243
	244	Float_t lamg=TMath::ATan2(ref->Pz(),ptg);
	245	hl->Fill((lam - lamg)*1000.);
	246
	247	hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
	248	}
	249
	250	Float_t mom=pt/TMath::Cos(lam);
	251	Float_t dedx=track->GetTPCsignal();
	252	hep->Fill(mom,dedx,1.);
	253	if (TMath::Abs(pdg)==211) //pions
	254	if (mom>0.4 && mom<0.5) {
	255	he->Fill(dedx,1.);
	256	}
cf98c13f	257	}
4fa1e629	258
	259	cout<<"\nList of Not found tracks :\n";
	260	for ( i = 0; i< itrack_notfound; i++){
	261	cout<<track_notfound[i]<<"\t";
	262	if ((i%5)==4) cout<<"\n";
cf98c13f	263	}
4fa1e629	264	cout<<"\nList of fake tracks :\n";
	265	for ( i = 0; i< itrack_fake; i++){
	266	cout<<track_fake[i]<<"\t";
	267	if ((i%5)==4) cout<<"\n";
cf98c13f	268	}
4fa1e629	269	cout<<"\nList of multiple found tracks :\n";
	270	for ( i=0; i<itrack_multifound; i++) {
	271	cout<<"id. "<<track_multifound[i]
	272	<<" found - "<<track_multifound_n[i]<<"times\n";
cc80f89e	273	}
73042f01	274
4fa1e629	275	cout<<"Number of found tracks ="<<nentr<<endl;
4fa1e629	276	cout<<"Number of \"good\" tracks ="<<ngood<<endl;
73042f01	277
4fa1e629	278	refs->Clear();
4fa1e629	279	}// ***** End of the loop over events
cc80f89e	280
8b462fd8	281	delete event;
4514157e	282	delete esdTree;
4fa1e629	283	ef->Close();
8c555625	284
4fa1e629	285	delete tpcTree;
4fa1e629	286	refFile->Close();
7f6ddf58	287
4fa1e629	288	Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
	289	if (ng!=0) cout<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
	290	cout<<"Total number selected of \"good\" tracks ="<<allselected<<endl<<endl;
	291	cout<<"Total number of found tracks ="<<allfound<<endl;
	292	cout<<"Total number of \"good\" tracks ="<<allgood<<endl;
	293	cout<<endl;
7f6ddf58	294
8c555625	295	gStyle->SetOptStat(111110);
	296	gStyle->SetOptFit(1);
	297
	298	TCanvas *c1=new TCanvas("c1","",0,0,700,850);
	299
2d343a94	300	Int_t minc=33;
2d343a94	301
8c555625	302	TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
8c555625	303	p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
2d343a94	304	hp->SetFillColor(4); hp->SetXTitle("(mrad)");
2d343a94	305	if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); c1->cd();
8c555625	306
	307	TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
	308	p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
2d343a94	309	hl->SetXTitle("(mrad)");
2d343a94	310	if (hl->GetEntries()<minc) hl->Draw(); else hl->Fit("gaus"); c1->cd();
8c555625	311
	312	TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
	313	p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
2d343a94	314	hpt->SetXTitle("(%)");
2d343a94	315	if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); c1->cd();
8c555625	316
	317	TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
	318	p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
2d343a94	319	hmpt->SetXTitle("(%)");
2d343a94	320	if (hmpt->GetEntries()<minc) hmpt->Draw(); else hmpt->Fit("gaus"); c1->cd();
8c555625	321
8c555625	322	TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
3c0f9266	323	p5->SetFillColor(41); p5->SetFrameFillColor(10);
8c555625	324	hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
	325	hg->Divide(hfound,hgood,1,1.,"b");
	326	hf->Divide(hfake,hgood,1,1.,"b");
	327	hg->SetMaximum(1.4);
	328	hg->SetYTitle("Tracking efficiency");
	329	hg->SetXTitle("Pt (GeV/c)");
	330	hg->Draw();
	331
7f6ddf58	332	TLine *line1 = new TLine(0.1,1.0,6.1,1.0); line1->SetLineStyle(4);
8c555625	333	line1->Draw("same");
7f6ddf58	334	TLine *line2 = new TLine(0.1,0.9,6.1,0.9); line2->SetLineStyle(4);
8c555625	335	line2->Draw("same");
	336
	337	hf->SetFillColor(1);
	338	hf->SetFillStyle(3013);
	339	hf->SetLineColor(2);
	340	hf->SetLineWidth(2);
	341	hf->Draw("histsame");
	342	TText *text = new TText(0.461176,0.248448,"Fake tracks");
	343	text->SetTextSize(0.05);
	344	text->Draw();
	345	text = new TText(0.453919,1.11408,"Good tracks");
	346	text->SetTextSize(0.05);
	347	text->Draw();
3c0f9266	348
	349
	350
	351	TCanvas *c2=new TCanvas("c2","",320,32,530,590);
	352
	353	TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
	354	p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
	355	he->SetFillColor(2); he->SetFillStyle(3005);
	356	he->SetXTitle("Arbitrary Units");
2d343a94	357	if (he->GetEntries()<minc) he->Draw(); else he->Fit("gaus"); c2->cd();
3c0f9266	358
	359	TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
	360	p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
	361	hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
	362	hep->Draw(); c1->cd();
	363
2d343a94	364	TFile fc("AliTPCComparison.root","RECREATE");
	365	c1->Write();
	366	c2->Write();
	367	fc.Close();
	368
4fa1e629	369	gBenchmark->Stop("AliTPCComparison");
	370	gBenchmark->Show("AliTPCComparison");
	371
73042f01	372	return 0;
cc80f89e	373	}
3c0f9266	374
cc80f89e	375
4fa1e629	376	Int_t GoodTracksTPC(const Char_t *dir) {
4fa1e629	377	Char_t fname[100];
4fa1e629	378	sprintf(fname,"%s/galice.root",dir);
cc80f89e	379
4fa1e629	380	AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON");
	381	if (!rl) {
	382	::Error("GoodTracksTPC","Can't start session !");
	383	return 1;
c630aafd	384	}
4fa1e629	385
	386	rl->LoadgAlice();
	387	rl->LoadHeader();
	388	rl->LoadKinematics();
	389	rl->LoadTrackRefs();
	390
c630aafd	391	AliTPCLoader tpcl = (AliTPCLoader )rl->GetLoader("TPCLoader");
c630aafd	392	if (tpcl == 0x0) {
4fa1e629	393	::Error("GoodTracksTPC","Can not find TPCLoader !");
	394	delete rl;
	395	return 2;
c630aafd	396	}
4fa1e629	397
88cb7938	398	AliTPC TPC=(AliTPC)rl->GetAliRun()->GetDetector("TPC");
73042f01	399	Int_t ver = TPC->IsVersion();
4fa1e629	400	cout<<"TPC version "<<ver<<" has been found !\n";
	401	if (ver==1) tpcl->LoadRecPoints();
	402	else if (ver==2) tpcl->LoadDigits();
	403	else {
	404	::Error("GoodTracksTPC","Wrong TPC version !");
	405	delete rl;
	406	return 3;
	407	}
73042f01	408
36bd09c9	409
36bd09c9	410	AliCDBManager *man=AliCDBManager::Instance();
162637e4	411	man->SetDefaultStorage("local://$ALICE_ROOT/OCDB");
36bd09c9	412	man->SetRun(0);
	413	AliTPCParamSR *digp=
	414	(AliTPCParamSR*)(AliTPCcalibDB::Instance()->GetParameters());
5102bab6	415	if (!digp) {
36bd09c9	416	::Error("AliTPCComparison.C","TPC parameters have not been found !");
4fa1e629	417	delete rl;
4fa1e629	418	return 4;
5102bab6	419	}
73042f01	420
	421	Int_t nrow_up=digp->GetNRowUp();
	422	Int_t nrows=digp->GetNRowLow()+nrow_up;
	423	Int_t zero=digp->GetZeroSup();
7f6ddf58	424	Int_t gap=Int_t(0.125nrows), shift=Int_t(0.5gap);
cc80f89e	425	Int_t good_number=Int_t(0.4*nrows);
cc80f89e	426
4fa1e629	427	Int_t nev=rl->GetNumberOfEvents();
	428	::Info("GoodTracksTPC","Number of events : %d\n",nev);
	429
	430
	431	sprintf(fname,"%s/GoodTracksTPC.root",dir);
	432	TFile *file=TFile::Open(fname,"recreate");
	433
	434	TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
	435	TTree tpcTree("tpcTree","Tree with info about the reconstructable TPC tracks");
	436	tpcTree.Branch("TPC",&refs);
	437
	438	//******** Loop over generated events
	439	for (Int_t e=0; e<nev; e++) {
	440	Int_t nt=0;
	441	refs->Clear();
	442
	443	Int_t i;
	444
	445	rl->GetEvent(e); file->cd();
	446
	447	Int_t np = rl->GetHeader()->GetNtrack();
	448	cout<<"Event "<<e<<" Number of particles: "<<np<<endl;
	449
	450	//******** Fill the "good" masks
	451	Int_t *good=new Int_t[np]; for (i=0; i<np; i++) good[i]=0;
	452	switch (ver) {
	453	case 1:
	454	{
	455	AliTPCClustersArray pca=new AliTPCClustersArray, &ca=pca;
	456	ca.Setup(digp);
	457	ca.SetClusterType("AliTPCcluster");
	458	ca.ConnectTree(tpcl->TreeR());
	459	Int_t nrows=Int_t(ca.GetTree()->GetEntries());
	460	for (Int_t n=0; n<nrows; n++) {
7f6ddf58	461	AliSegmentID *s=ca.LoadEntry(n);
	462	Int_t sec,row;
	463	digp->AdjustSectorRow(s->GetID(),sec,row);
	464	AliTPCClustersRow &clrow = *ca.GetRow(sec,row);
	465	Int_t ncl=clrow.GetArray()->GetEntriesFast();
	466	while (ncl--) {
	467	AliTPCcluster c=(AliTPCcluster)clrow[ncl];
	468	Int_t lab=c->GetLabel(0);
	469	if (lab<0) continue; //noise cluster
	470	lab=TMath::Abs(lab);
	471
	472	if (sec>=digp->GetNInnerSector())
	473	if (row==nrow_up-1) good[lab]\|=0x4000;
	474	if (sec>=digp->GetNInnerSector())
	475	if (row==nrow_up-1-gap) good[lab]\|=0x1000;
	476
	477	if (sec>=digp->GetNInnerSector())
	478	if (row==nrow_up-1-shift) good[lab]\|=0x2000;
	479	if (sec>=digp->GetNInnerSector())
	480	if (row==nrow_up-1-gap-shift) good[lab]\|=0x800;
	481
	482	good[lab]++;
	483	}
	484	ca.ClearRow(sec,row);
4fa1e629	485	}
	486	delete pca;
	487	}
	488	break;
	489	case 2:
	490	{
	491	TTree *TD=tpcl->TreeD();
88cb7938	492
4fa1e629	493	AliSimDigits da, *digits=&da;
4fa1e629	494	TD->GetBranch("Segment")->SetAddress(&digits);
7f6ddf58	495
4fa1e629	496	Int_t *count = new Int_t[np];
	497	Int_t i;
	498	for (i=0; i<np; i++) count[i]=0;
7f6ddf58	499
4fa1e629	500	Int_t sectors_by_rows=(Int_t)TD->GetEntries();
4fa1e629	501	for (i=0; i<sectors_by_rows; i++) {
7f6ddf58	502	if (!TD->GetEvent(i)) continue;
	503	Int_t sec,row;
	504	digp->AdjustSectorRow(digits->GetID(),sec,row);
4fa1e629	505	//cerr<<sec<<' '<<row<<'\r';
7f6ddf58	506	digits->First();
	507	do { //Many thanks to J.Chudoba who noticed this
	508	Int_t it=digits->CurrentRow(), ip=digits->CurrentColumn();
	509	Short_t dig = digits->GetDigit(it,ip);
	510	Int_t idx0=digits->GetTrackID(it,ip,0);
	511	Int_t idx1=digits->GetTrackID(it,ip,1);
	512	Int_t idx2=digits->GetTrackID(it,ip,2);
8ded1b7a	513	if (idx0>=0 && dig>=zero && idx0<np) count[idx0]+=1;
	514	if (idx1>=0 && dig>=zero && idx1<np) count[idx1]+=1;
	515	if (idx2>=0 && dig>=zero && idx2<np) count[idx2]+=1;
afc42102	516	} while (digits->Next());
7f6ddf58	517	for (Int_t j=0; j<np; j++) {
	518	if (count[j]>1) {
	519	if (sec>=digp->GetNInnerSector())
	520	if (row==nrow_up-1 ) good[j]\|=0x4000;
	521	if (sec>=digp->GetNInnerSector())
	522	if (row==nrow_up-1-gap) good[j]\|=0x1000;
	523
	524	if (sec>=digp->GetNInnerSector())
	525	if (row==nrow_up-1-shift) good[j]\|=0x2000;
	526	if (sec>=digp->GetNInnerSector())
	527	if (row==nrow_up-1-gap-shift) good[j]\|=0x800;
	528	good[j]++;
	529	}
	530	count[j]=0;
	531	}
4fa1e629	532	}
	533	delete[] count;
	534	}
	535	break;
afc42102	536	}
7f6ddf58	537
4fa1e629	538
	539	//****** select tracks which are "good" enough
	540	AliStack* stack = rl->Stack();
	541	for (i=0; i<np; i++) {
	542	if ((good[i]&0x5000) != 0x5000)
	543	if ((good[i]&0x2800) != 0x2800) continue;
	544	if ((good[i]&0x7FF ) < good_number) continue;
	545
	546	TParticle p = (TParticle)stack->Particle(i);
	547	if (p == 0x0) {
88cb7938	548	cerr<<"Can not get particle "<<i<<endl;
88cb7938	549	continue;
024a7fe9	550	}
4fa1e629	551	if (p->Pt()<0.100) continue;
4fa1e629	552	if (TMath::Abs(p->Pz()/p->Pt())>0.999) continue;
bf018fe4	553
404e569d	554	Double_t vx=p->Vx(),vy=p->Vy(),vz=p->Vz();
4fa1e629	555	if (TMath::Sqrt(vxvx+vyvy)>3.5) continue;
404e569d	556	if (TMath::Abs(vz) > 50.) continue;
7f6ddf58	557
4fa1e629	558	AliTrackReference ref=new((refs)[nt]) AliTrackReference();
	559
	560	ref->SetLabel(i);
	561	Int_t pdg=p->GetPdgCode();
	562	ref->SetLength(pdg); //This will the particle's PDG !
	563	ref->SetMomentum(0.,0.,0.);
	564	ref->SetPosition(0.,0.,0.);
	565
	566	nt++;
	567	}
	568
	569	//**** check if there is also information at the entrance of the TPC
	570	TTree *TR=rl->TreeTR();
fc023202	571	TBranch *branch=TR->GetBranch("TrackReferences");
4fa1e629	572	if (branch==0) {
	573	::Error("GoodTracksTPC","No track references !");
	574	delete rl;
	575	return 5;
	576	}
	577	TClonesArray tpcdummy("AliTrackReference",1000), *tpcRefs=&tpcdummy;
	578	branch->SetAddress(&tpcRefs);
	579	Int_t nr=(Int_t)TR->GetEntries();
	580	for (Int_t r=0; r<nr; r++) {
	581	//cerr<<r<<' '<<nr<<'\r';
	582	TR->GetEvent(r);
fc023202	583
	584	Int_t nref = tpcRefs->GetEntriesFast();
	585	if (!nref) continue;
	586	AliTrackReference *tpcRef= 0x0;
	587	for (Int_t iref=0; iref<nref; ++iref) {
	588	tpcRef = (AliTrackReference*)tpcRefs->UncheckedAt(iref);
	589	if (tpcRef->DetectorId() == AliTrackReference::kTPC) break;
	590	tpcRef = 0x0;
	591	}
	592
	593	if (!tpcRef) continue;
	594
4fa1e629	595	Int_t j;
	596	AliTrackReference *ref=0;
	597	for (j=0; j<nt; j++) {
	598	ref=(AliTrackReference *)refs->UncheckedAt(j);
	599	if (ref->Label()==tpcRef->Label()) break;
	600	ref=0;
	601	}
	602	if (ref==0) continue;
	603
	604	ref->SetMomentum(tpcRef->Px(),tpcRef->Py(),tpcRef->Pz());
	605	ref->SetPosition(tpcRef->LocalX(),tpcRef->LocalY(),tpcRef->Z());
	606
	607	tpcRefs->Clear();
	608	}
	609
	610	tpcTree.Fill();
	611
	612	delete[] good;
	613	} //****** end of the loop over generated events
7f6ddf58	614
88cb7938	615
4fa1e629	616	tpcTree.Write();
4fa1e629	617	file->Close();
7f6ddf58	618
4fa1e629	619	delete rl;
4fa1e629	620	return 0;
8c555625	621	}