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

/****************************************************************************
 *           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.         *
 *                                                                          *
 *           Origin: I.Belikov, CERN, Jouri.Belikov@cern.ch                 *
 * with several nice improvements by: 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"
#endif

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

extern AliRun *gAlice;
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) {
   if (gAlice) { 
       delete gAlice->GetRunLoader();
       delete gAlice;//if everything was OK here it is already NULL
       gAlice = 0x0;
   }

   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;
   } 

   rl->CdGAFile();
   AliTPCParamSR *digp=(AliTPCParamSR*)gDirectory->Get("75x40_100x60_150x60");
   if (!digp) { 
     ::Error("AliTPCHits2Digits.C","TPC parameters have not been found !");
     delete rl;
     return 4; 
   }
   TPC->SetParam(digp);

   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();
        if (TMath::Sqrt(vx*vx+vy*vy)>3.5) 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
7f6ddf58	1	/****************************************************************************
	2	* Very important, delicate and rather obscure macro. *
	3	* *
	4	* Creates list of "trackable" tracks, *
7f6ddf58	5	* calculates efficiency, resolutions etc. *
bf018fe4	6	* There is a possibility to run this macro over several events. *
7f6ddf58	7	* *
024a7fe9	8	* Origin: I.Belikov, CERN, Jouri.Belikov@cern.ch *
7f6ddf58	9	* with several nice improvements by: M.Ivanov, GSI, m.ivanov@gsi.de *
	10	****************************************************************************/
	11
c630aafd	12	#if !defined(__CINT__) \|\| defined(__MAKECINT__)
5102bab6	13	#include <TMath.h>
	14	#include <TError.h>
	15	#include <Riostream.h>
	16	#include <TH1F.h>
	17	#include <TH2F.h>
	18	#include <TTree.h>
	19	#include <TParticle.h>
5102bab6	20	#include <TCanvas.h>
	21	#include <TLine.h>
	22	#include <TText.h>
	23	#include <TBenchmark.h>
	24	#include <TStyle.h>
8b462fd8	25	#include <TFile.h>
bf018fe4	26	#include <TROOT.h>
5102bab6	27
	28	#include "AliStack.h"
	29	#include "AliHeader.h"
	30	#include "AliTrackReference.h"
88cb7938	31	#include "AliRunLoader.h"
c630aafd	32	#include "AliRun.h"
4514157e	33	#include "AliESDEvent.h"
fc023202	34	#include "AliESDtrack.h"
5102bab6	35
	36	#include "AliSimDigits.h"
	37	#include "AliTPC.h"
	38	#include "AliTPCParamSR.h"
	39	#include "AliTPCClustersArray.h"
	40	#include "AliTPCClustersRow.h"
bf018fe4	41	#include "AliTPCcluster.h"
5102bab6	42	#include "AliTPCLoader.h"
be9c5115	43	#endif
be9c5115	44
4fa1e629	45	Int_t GoodTracksTPC(const Char_t *dir=".");
88cb7938	46
c630aafd	47	extern AliRun *gAlice;
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
	158
	159	//***** Loop over events *******
	160	Int_t e=0;
8b462fd8	161	while (esdTree->GetEvent(e)) {
4fa1e629	162	cout<<endl<<endl<<"******* Processing event number: "<<e<<"*****\n";
4fa1e629	163
4fa1e629	164	Int_t nentr=event->GetNumberOfTracks();
	165	allfound+=nentr;
	166
	167	if (tpcTree->GetEvent(e++)==0) {
	168	cerr<<"No reconstructable tracks !\n";
	169	continue;
	170	}
	171
	172	Int_t ngood=refs->GetEntriesFast();
	173	allgood+=ngood;
	174
	175	const Int_t MAX=15000;
	176	//MI change
	177	Int_t track_notfound[MAX], itrack_notfound=0;
	178	Int_t track_fake[MAX], itrack_fake=0;
	179	Int_t track_multifound[MAX],track_multifound_n[MAX],itrack_multifound=0;
	180
	181	Int_t i;
	182	for (Int_t k=0; k<ngood; k++) {
	183	AliTrackReference ref=(AliTrackReference)refs->UncheckedAt(k);
	184	Int_t lab=ref->Label(), tlab=-1;
	185	Float_t ptg=TMath::Sqrt(ref->Px()ref->Px() + ref->Py()ref->Py());
	186
	187	if (ptg<1e-33) continue; // for those not crossing 0 pad row
	188
	189	if (ptg<ptcutl) continue;
	190	if (ptg>ptcuth) continue;
	191
	192	allselected++;
	193
	194	hgood->Fill(ptg);
	195
	196	AliESDtrack *track=0;
	197	for (i=0; i<nentr; i++) {
bf018fe4	198	track=event->GetTrack(i);
162085b7	199	tlab=track->GetTPCLabel();
cc80f89e	200	if (lab==TMath::Abs(tlab)) break;
4fa1e629	201	}
	202	if (i==nentr) {
	203	track_notfound[itrack_notfound++]=lab;
	204	continue;
	205	}
	206
	207	//MI change - addition
	208	Int_t micount=0;
	209	Int_t mi;
	210	AliESDtrack * mitrack;
	211	for (mi=0; mi<nentr; mi++) {
	212	mitrack=event->GetTrack(mi);
	213	if (lab==TMath::Abs(mitrack->GetTPCLabel())) micount++;
	214	}
	215	if (micount>1) {
	216	track_multifound[itrack_multifound]=lab;
	217	track_multifound_n[itrack_multifound]=micount;
	218	itrack_multifound++;
	219	}
	220	if ((track->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
	221	if (lab==tlab) hfound->Fill(ptg);
	222	else {
	223	track_fake[itrack_fake++]=lab;
	224	hfake->Fill(ptg);
	225	}
cf98c13f	226
4fa1e629	227	Double_t pxpypz[3]; track->GetInnerPxPyPz(pxpypz);
	228	Float_t phi=TMath::ATan2(pxpypz[1],pxpypz[0]);
	229	if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
	230	if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
	231	Double_t pt=TMath::Sqrt(pxpypz[0]pxpypz[0]+pxpypz[1]pxpypz[1]);
	232	Float_t lam=TMath::ATan2(pxpypz[2],pt);
	233	Float_t pt_1=1/pt;
	234
	235	Int_t pdg=(Int_t)ref->GetLength(); //this is particle's PDG !
	236
	237	if (TMath::Abs(pdg)==11 && ptg>4.) {//high momentum electrons
	238	hmpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
	239	} else {
	240	Float_t phig=TMath::ATan2(ref->Py(),ref->Px());
	241	hp->Fill((phi - phig)*1000.);
	242
	243	Float_t lamg=TMath::ATan2(ref->Pz(),ptg);
	244	hl->Fill((lam - lamg)*1000.);
	245
	246	hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
	247	}
	248
	249	Float_t mom=pt/TMath::Cos(lam);
	250	Float_t dedx=track->GetTPCsignal();
	251	hep->Fill(mom,dedx,1.);
	252	if (TMath::Abs(pdg)==211) //pions
	253	if (mom>0.4 && mom<0.5) {
	254	he->Fill(dedx,1.);
	255	}
cf98c13f	256	}
4fa1e629	257
	258	cout<<"\nList of Not found tracks :\n";
	259	for ( i = 0; i< itrack_notfound; i++){
	260	cout<<track_notfound[i]<<"\t";
	261	if ((i%5)==4) cout<<"\n";
cf98c13f	262	}
4fa1e629	263	cout<<"\nList of fake tracks :\n";
	264	for ( i = 0; i< itrack_fake; i++){
	265	cout<<track_fake[i]<<"\t";
	266	if ((i%5)==4) cout<<"\n";
cf98c13f	267	}
4fa1e629	268	cout<<"\nList of multiple found tracks :\n";
	269	for ( i=0; i<itrack_multifound; i++) {
	270	cout<<"id. "<<track_multifound[i]
	271	<<" found - "<<track_multifound_n[i]<<"times\n";
cc80f89e	272	}
73042f01	273
4fa1e629	274	cout<<"Number of found tracks ="<<nentr<<endl;
4fa1e629	275	cout<<"Number of \"good\" tracks ="<<ngood<<endl;
73042f01	276
4fa1e629	277	refs->Clear();
4fa1e629	278	}// ***** End of the loop over events
cc80f89e	279
8b462fd8	280	delete event;
4514157e	281	delete esdTree;
4fa1e629	282	ef->Close();
8c555625	283
4fa1e629	284	delete tpcTree;
4fa1e629	285	refFile->Close();
7f6ddf58	286
4fa1e629	287	Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
	288	if (ng!=0) cout<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
	289	cout<<"Total number selected of \"good\" tracks ="<<allselected<<endl<<endl;
	290	cout<<"Total number of found tracks ="<<allfound<<endl;
	291	cout<<"Total number of \"good\" tracks ="<<allgood<<endl;
	292	cout<<endl;
7f6ddf58	293
8c555625	294	gStyle->SetOptStat(111110);
	295	gStyle->SetOptFit(1);
	296
	297	TCanvas *c1=new TCanvas("c1","",0,0,700,850);
	298
2d343a94	299	Int_t minc=33;
2d343a94	300
8c555625	301	TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
8c555625	302	p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
2d343a94	303	hp->SetFillColor(4); hp->SetXTitle("(mrad)");
2d343a94	304	if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); c1->cd();
8c555625	305
	306	TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
	307	p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
2d343a94	308	hl->SetXTitle("(mrad)");
2d343a94	309	if (hl->GetEntries()<minc) hl->Draw(); else hl->Fit("gaus"); c1->cd();
8c555625	310
	311	TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
	312	p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
2d343a94	313	hpt->SetXTitle("(%)");
2d343a94	314	if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); c1->cd();
8c555625	315
	316	TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
	317	p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
2d343a94	318	hmpt->SetXTitle("(%)");
2d343a94	319	if (hmpt->GetEntries()<minc) hmpt->Draw(); else hmpt->Fit("gaus"); c1->cd();
8c555625	320
8c555625	321	TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
3c0f9266	322	p5->SetFillColor(41); p5->SetFrameFillColor(10);
8c555625	323	hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
	324	hg->Divide(hfound,hgood,1,1.,"b");
	325	hf->Divide(hfake,hgood,1,1.,"b");
	326	hg->SetMaximum(1.4);
	327	hg->SetYTitle("Tracking efficiency");
	328	hg->SetXTitle("Pt (GeV/c)");
	329	hg->Draw();
	330
7f6ddf58	331	TLine *line1 = new TLine(0.1,1.0,6.1,1.0); line1->SetLineStyle(4);
8c555625	332	line1->Draw("same");
7f6ddf58	333	TLine *line2 = new TLine(0.1,0.9,6.1,0.9); line2->SetLineStyle(4);
8c555625	334	line2->Draw("same");
	335
	336	hf->SetFillColor(1);
	337	hf->SetFillStyle(3013);
	338	hf->SetLineColor(2);
	339	hf->SetLineWidth(2);
	340	hf->Draw("histsame");
	341	TText *text = new TText(0.461176,0.248448,"Fake tracks");
	342	text->SetTextSize(0.05);
	343	text->Draw();
	344	text = new TText(0.453919,1.11408,"Good tracks");
	345	text->SetTextSize(0.05);
	346	text->Draw();
3c0f9266	347
	348
	349
	350	TCanvas *c2=new TCanvas("c2","",320,32,530,590);
	351
	352	TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
	353	p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
	354	he->SetFillColor(2); he->SetFillStyle(3005);
	355	he->SetXTitle("Arbitrary Units");
2d343a94	356	if (he->GetEntries()<minc) he->Draw(); else he->Fit("gaus"); c2->cd();
3c0f9266	357
	358	TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
	359	p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
	360	hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
	361	hep->Draw(); c1->cd();
	362
2d343a94	363	TFile fc("AliTPCComparison.root","RECREATE");
	364	c1->Write();
	365	c2->Write();
	366	fc.Close();
	367
4fa1e629	368	gBenchmark->Stop("AliTPCComparison");
	369	gBenchmark->Show("AliTPCComparison");
	370
73042f01	371	return 0;
cc80f89e	372	}
3c0f9266	373
cc80f89e	374
4fa1e629	375	Int_t GoodTracksTPC(const Char_t *dir) {
	376	if (gAlice) {
	377	delete gAlice->GetRunLoader();
	378	delete gAlice;//if everything was OK here it is already NULL
	379	gAlice = 0x0;
	380	}
	381
	382	Char_t fname[100];
	383	sprintf(fname,"%s/galice.root",dir);
cc80f89e	384
4fa1e629	385	AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON");
	386	if (!rl) {
	387	::Error("GoodTracksTPC","Can't start session !");
	388	return 1;
c630aafd	389	}
4fa1e629	390
	391	rl->LoadgAlice();
	392	rl->LoadHeader();
	393	rl->LoadKinematics();
	394	rl->LoadTrackRefs();
	395
c630aafd	396	AliTPCLoader tpcl = (AliTPCLoader )rl->GetLoader("TPCLoader");
c630aafd	397	if (tpcl == 0x0) {
4fa1e629	398	::Error("GoodTracksTPC","Can not find TPCLoader !");
	399	delete rl;
	400	return 2;
c630aafd	401	}
4fa1e629	402
88cb7938	403	AliTPC TPC=(AliTPC)rl->GetAliRun()->GetDetector("TPC");
73042f01	404	Int_t ver = TPC->IsVersion();
4fa1e629	405	cout<<"TPC version "<<ver<<" has been found !\n";
	406	if (ver==1) tpcl->LoadRecPoints();
	407	else if (ver==2) tpcl->LoadDigits();
	408	else {
	409	::Error("GoodTracksTPC","Wrong TPC version !");
	410	delete rl;
	411	return 3;
	412	}
73042f01	413
88cb7938	414	rl->CdGAFile();
88cb7938	415	AliTPCParamSR digp=(AliTPCParamSR)gDirectory->Get("75x40_100x60_150x60");
5102bab6	416	if (!digp) {
4fa1e629	417	::Error("AliTPCHits2Digits.C","TPC parameters have not been found !");
	418	delete rl;
	419	return 4;
5102bab6	420	}
73042f01	421	TPC->SetParam(digp);
	422
	423	Int_t nrow_up=digp->GetNRowUp();
	424	Int_t nrows=digp->GetNRowLow()+nrow_up;
	425	Int_t zero=digp->GetZeroSup();
7f6ddf58	426	Int_t gap=Int_t(0.125nrows), shift=Int_t(0.5gap);
cc80f89e	427	Int_t good_number=Int_t(0.4*nrows);
cc80f89e	428
4fa1e629	429	Int_t nev=rl->GetNumberOfEvents();
	430	::Info("GoodTracksTPC","Number of events : %d\n",nev);
	431
	432
	433	sprintf(fname,"%s/GoodTracksTPC.root",dir);
	434	TFile *file=TFile::Open(fname,"recreate");
	435
	436	TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
	437	TTree tpcTree("tpcTree","Tree with info about the reconstructable TPC tracks");
	438	tpcTree.Branch("TPC",&refs);
	439
	440	//******** Loop over generated events
	441	for (Int_t e=0; e<nev; e++) {
	442	Int_t nt=0;
	443	refs->Clear();
	444
	445	Int_t i;
	446
	447	rl->GetEvent(e); file->cd();
	448
	449	Int_t np = rl->GetHeader()->GetNtrack();
	450	cout<<"Event "<<e<<" Number of particles: "<<np<<endl;
	451
	452	//******** Fill the "good" masks
	453	Int_t *good=new Int_t[np]; for (i=0; i<np; i++) good[i]=0;
	454	switch (ver) {
	455	case 1:
	456	{
	457	AliTPCClustersArray pca=new AliTPCClustersArray, &ca=pca;
	458	ca.Setup(digp);
	459	ca.SetClusterType("AliTPCcluster");
	460	ca.ConnectTree(tpcl->TreeR());
	461	Int_t nrows=Int_t(ca.GetTree()->GetEntries());
	462	for (Int_t n=0; n<nrows; n++) {
7f6ddf58	463	AliSegmentID *s=ca.LoadEntry(n);
	464	Int_t sec,row;
	465	digp->AdjustSectorRow(s->GetID(),sec,row);
	466	AliTPCClustersRow &clrow = *ca.GetRow(sec,row);
	467	Int_t ncl=clrow.GetArray()->GetEntriesFast();
	468	while (ncl--) {
	469	AliTPCcluster c=(AliTPCcluster)clrow[ncl];
	470	Int_t lab=c->GetLabel(0);
	471	if (lab<0) continue; //noise cluster
	472	lab=TMath::Abs(lab);
	473
	474	if (sec>=digp->GetNInnerSector())
	475	if (row==nrow_up-1) good[lab]\|=0x4000;
	476	if (sec>=digp->GetNInnerSector())
	477	if (row==nrow_up-1-gap) good[lab]\|=0x1000;
	478
	479	if (sec>=digp->GetNInnerSector())
	480	if (row==nrow_up-1-shift) good[lab]\|=0x2000;
	481	if (sec>=digp->GetNInnerSector())
	482	if (row==nrow_up-1-gap-shift) good[lab]\|=0x800;
	483
	484	good[lab]++;
	485	}
	486	ca.ClearRow(sec,row);
4fa1e629	487	}
	488	delete pca;
	489	}
	490	break;
	491	case 2:
	492	{
	493	TTree *TD=tpcl->TreeD();
88cb7938	494
4fa1e629	495	AliSimDigits da, *digits=&da;
4fa1e629	496	TD->GetBranch("Segment")->SetAddress(&digits);
7f6ddf58	497
4fa1e629	498	Int_t *count = new Int_t[np];
	499	Int_t i;
	500	for (i=0; i<np; i++) count[i]=0;
7f6ddf58	501
4fa1e629	502	Int_t sectors_by_rows=(Int_t)TD->GetEntries();
4fa1e629	503	for (i=0; i<sectors_by_rows; i++) {
7f6ddf58	504	if (!TD->GetEvent(i)) continue;
	505	Int_t sec,row;
	506	digp->AdjustSectorRow(digits->GetID(),sec,row);
4fa1e629	507	//cerr<<sec<<' '<<row<<'\r';
7f6ddf58	508	digits->First();
	509	do { //Many thanks to J.Chudoba who noticed this
	510	Int_t it=digits->CurrentRow(), ip=digits->CurrentColumn();
	511	Short_t dig = digits->GetDigit(it,ip);
	512	Int_t idx0=digits->GetTrackID(it,ip,0);
	513	Int_t idx1=digits->GetTrackID(it,ip,1);
	514	Int_t idx2=digits->GetTrackID(it,ip,2);
8ded1b7a	515	if (idx0>=0 && dig>=zero && idx0<np) count[idx0]+=1;
	516	if (idx1>=0 && dig>=zero && idx1<np) count[idx1]+=1;
	517	if (idx2>=0 && dig>=zero && idx2<np) count[idx2]+=1;
afc42102	518	} while (digits->Next());
7f6ddf58	519	for (Int_t j=0; j<np; j++) {
	520	if (count[j]>1) {
	521	if (sec>=digp->GetNInnerSector())
	522	if (row==nrow_up-1 ) good[j]\|=0x4000;
	523	if (sec>=digp->GetNInnerSector())
	524	if (row==nrow_up-1-gap) good[j]\|=0x1000;
	525
	526	if (sec>=digp->GetNInnerSector())
	527	if (row==nrow_up-1-shift) good[j]\|=0x2000;
	528	if (sec>=digp->GetNInnerSector())
	529	if (row==nrow_up-1-gap-shift) good[j]\|=0x800;
	530	good[j]++;
	531	}
	532	count[j]=0;
	533	}
4fa1e629	534	}
	535	delete[] count;
	536	}
	537	break;
afc42102	538	}
7f6ddf58	539
4fa1e629	540
	541	//****** select tracks which are "good" enough
	542	AliStack* stack = rl->Stack();
	543	for (i=0; i<np; i++) {
	544	if ((good[i]&0x5000) != 0x5000)
	545	if ((good[i]&0x2800) != 0x2800) continue;
	546	if ((good[i]&0x7FF ) < good_number) continue;
	547
	548	TParticle p = (TParticle)stack->Particle(i);
	549	if (p == 0x0) {
88cb7938	550	cerr<<"Can not get particle "<<i<<endl;
88cb7938	551	continue;
024a7fe9	552	}
4fa1e629	553	if (p->Pt()<0.100) continue;
4fa1e629	554	if (TMath::Abs(p->Pz()/p->Pt())>0.999) continue;
bf018fe4	555
4fa1e629	556	Double_t vx=p->Vx(),vy=p->Vy();
4fa1e629	557	if (TMath::Sqrt(vxvx+vyvy)>3.5) continue;
7f6ddf58	558
4fa1e629	559	AliTrackReference ref=new((refs)[nt]) AliTrackReference();
	560
	561	ref->SetLabel(i);
	562	Int_t pdg=p->GetPdgCode();
	563	ref->SetLength(pdg); //This will the particle's PDG !
	564	ref->SetMomentum(0.,0.,0.);
	565	ref->SetPosition(0.,0.,0.);
	566
	567	nt++;
	568	}
	569
	570	//**** check if there is also information at the entrance of the TPC
	571	TTree *TR=rl->TreeTR();
fc023202	572	TBranch *branch=TR->GetBranch("TrackReferences");
4fa1e629	573	if (branch==0) {
	574	::Error("GoodTracksTPC","No track references !");
	575	delete rl;
	576	return 5;
	577	}
	578	TClonesArray tpcdummy("AliTrackReference",1000), *tpcRefs=&tpcdummy;
	579	branch->SetAddress(&tpcRefs);
	580	Int_t nr=(Int_t)TR->GetEntries();
	581	for (Int_t r=0; r<nr; r++) {
	582	//cerr<<r<<' '<<nr<<'\r';
	583	TR->GetEvent(r);
fc023202	584
	585	Int_t nref = tpcRefs->GetEntriesFast();
	586	if (!nref) continue;
	587	AliTrackReference *tpcRef= 0x0;
	588	for (Int_t iref=0; iref<nref; ++iref) {
	589	tpcRef = (AliTrackReference*)tpcRefs->UncheckedAt(iref);
	590	if (tpcRef->DetectorId() == AliTrackReference::kTPC) break;
	591	tpcRef = 0x0;
	592	}
	593
	594	if (!tpcRef) continue;
	595
4fa1e629	596	Int_t j;
	597	AliTrackReference *ref=0;
	598	for (j=0; j<nt; j++) {
	599	ref=(AliTrackReference *)refs->UncheckedAt(j);
	600	if (ref->Label()==tpcRef->Label()) break;
	601	ref=0;
	602	}
	603	if (ref==0) continue;
	604
	605	ref->SetMomentum(tpcRef->Px(),tpcRef->Py(),tpcRef->Pz());
	606	ref->SetPosition(tpcRef->LocalX(),tpcRef->LocalY(),tpcRef->Z());
	607
	608	tpcRefs->Clear();
	609	}
	610
	611	tpcTree.Fill();
	612
	613	delete[] good;
	614	} //****** end of the loop over generated events
7f6ddf58	615
88cb7938	616
4fa1e629	617	tpcTree.Write();
4fa1e629	618	file->Close();
7f6ddf58	619
4fa1e629	620	delete rl;
4fa1e629	621	return 0;
8c555625	622	}