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

/****************************************************************************
 *           Very important, delicate and rather obscure macro.             *
 *                                                                          *
 *               Creates list of "trackable" tracks,                        *
 *             calculates efficiency, resolutions etc.                      *
 *  The ESD tracks must be in an appropriate state (kTPCin or kTPCrefit)    *
 *                                                                          *
 *           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 <TPad.h>
  #include <TCanvas.h>
  #include <TLine.h>
  #include <TText.h>
  #include <TBenchmark.h>
  #include <TStyle.h>
  #include <TKey.h>

  #include "AliStack.h"
  #include "AliHeader.h"
  #include "AliTrackReference.h"
  #include "AliRunLoader.h"
  #include "AliMagF.h"
  #include "AliRun.h"
  #include "AliESD.h"

  #include "AliSimDigits.h"
  #include "AliTPC.h"
  #include "AliTPCParamSR.h"
  #include "AliTPCClustersArray.h"
  #include "AliTPCClustersRow.h"
  #include "AliTPCtracker.h"
  #include "AliTPCLoader.h"
#endif

struct GoodTrackTPC {
  Int_t lab;
  Int_t code;
  Float_t px,py,pz;
  Float_t x,y,z;
};

Int_t good_tracks_tpc(GoodTrackTPC *gt, const Int_t max, 
const char* evfoldname=AliConfig::fgkDefaultEventFolderName);

extern AliRun *gAlice;
extern TBenchmark *gBenchmark;

Int_t AliTPCComparison() {
   gBenchmark->Start("AliTPCComparison");

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

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

   AliRunLoader *rl = AliRunLoader::Open("galice.root","COMPARISON");
   if (!rl) {
       ::Fatal("AliTPCComparison.C","Can't start session !");
   }

   rl->LoadgAlice();
   if (rl->GetAliRun())
   AliKalmanTrack::SetConvConst(
     1000/0.299792458/rl->GetAliRun()->Field()->SolenoidField()
   );
   else {
       ::Fatal("AliTPCComparison.C","Can't get AliRun !");
   }
   //rl->UnloadgAlice();
  

   /* Generate a list of "good" tracks */
   const Int_t MAX=20000;
   GoodTrackTPC gt[MAX];
   Int_t ngood=0;
   ifstream in("good_tracks_tpc");
   if (in) {
      ::Info("AliTPCComparison.C","Reading good tracks...");
      while (in>>gt[ngood].lab>>gt[ngood].code>>
                 gt[ngood].px>>gt[ngood].py>>gt[ngood].pz>>
                 gt[ngood].x >>gt[ngood].y >>gt[ngood].z) {
	  ngood++;
	  if (ngood==MAX) {
	    ::Warning("AliTPCComparison.C","Too many good tracks !");
	    break;
	  }	
      }
      if (!in.eof()) 
        ::Fatal("AliTPCComparison.C","Read error (good_tracks_tpc) !");
   } else {
      ::Info
      ("AliTPCComparison","Marking good tracks (this will take a while)...");
      ngood=good_tracks_tpc(gt,MAX,"COMPARISON");
      ofstream out("good_tracks_tpc");
      if (out) {
         for (Int_t ngd=0; ngd<ngood; ngd++)            
	    out<<gt[ngd].lab<<' '<<gt[ngd].code<<' '<<
                 gt[ngd].px<<' '<<gt[ngd].py<<' '<<gt[ngd].pz<<' '<<
                 gt[ngd].x <<' '<<gt[ngd].y <<' '<<gt[ngd].z <<endl;
      } else 
         ::Fatal("AliTPCComparison.C","Can not open file (good_tracks_tpc) !");
      out.close();
   }

   Int_t i=0; TObjArray tarray(MAX);
   { /*Load tracks*/
   TFile *ef=TFile::Open("AliESDtpc.root");
   if ((!ef)||(!ef->IsOpen())) {
      ::Fatal("AliTPCComparison.C","Can't open AliESDtpc.root !");
   }
   TKey *key=0;
   TIter next(ef->GetListOfKeys());
   if ((key=(TKey*)next())!=0) {
     AliESD *event=(AliESD*)key->ReadObj();
     Int_t ntrk=event->GetNumberOfTracks();
     for (Int_t i=0; i<ntrk; i++) {
        AliESDtrack *t=event->GetTrack(i);
        if ((t->GetStatus()&AliESDtrack::kTPCin)==0) continue;
        AliTPCtrack *iotrack=new AliTPCtrack(*t);
        tarray.AddLast(iotrack);
     }
     delete event;
   }
   ef->Close();
   }
   Int_t nentr=tarray.GetEntriesFast();

   TH1F *hp=new TH1F("hp","PHI resolution",50,-20.,20.); hp->SetFillColor(4);
   TH1F *hl=new TH1F("hl","LAMBDA resolution",50,-20,20);hl->SetFillColor(4);
   TH1F *hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.); 
   hpt->SetFillColor(2); 
   TH1F *hmpt=new TH1F("hmpt","Relative Pt resolution (pt>4GeV/c)",30,-60,60); 
   hmpt->SetFillColor(6);

   TH1F *hgood=new TH1F("hgood","Good tracks",30,0.2,6.1);    
   TH1F *hfound=new TH1F("hfound","Found tracks",30,0.2,6.1);
   TH1F *hfake=new TH1F("hfake","Fake tracks",30,0.2,6.1);
   TH1F *hg=new TH1F("hg","Efficiency for good tracks",30,0.2,6.1);
   hg->SetLineColor(4); hg->SetLineWidth(2);
   TH1F *hf=new TH1F("hf","Efficiency for fake tracks",30,0.2,6.1);
   hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);

   TH1F *he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,100.);
   TH2F *hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,400.);
   hep->SetMarkerStyle(8);
   hep->SetMarkerSize(0.4);

   //MI change
   Int_t mingood=ngood;
   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;

   while (ngood--) {
      Int_t lab=gt[ngood].lab,tlab=-1;
      Float_t ptg=
      TMath::Sqrt(gt[ngood].px*gt[ngood].px + gt[ngood].py*gt[ngood].py);

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

      hgood->Fill(ptg);

      AliTPCtrack *track=0;
      for (i=0; i<nentr; i++) {
          track=(AliTPCtrack*)tarray.UncheckedAt(i);
          tlab=track->GetLabel();
          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;
      AliTPCtrack * mitrack;
      for (mi=0; mi<nentr; mi++) {
	mitrack=(AliTPCtrack*)tarray.UncheckedAt(mi);          
	if (lab==TMath::Abs(mitrack->GetLabel())) micount++;
      }
      if (micount>1) {
	track_multifound[itrack_multifound]=lab;
	track_multifound_n[itrack_multifound]=micount;
	itrack_multifound++;
      }
      
      Double_t xk=gt[ngood].x;
      track->PropagateTo(xk);

      if (lab==tlab) hfound->Fill(ptg);
      else { 
	track_fake[itrack_fake++]=lab;
	hfake->Fill(ptg); 
      }

      Double_t par[5]; track->GetExternalParameters(xk,par);
      Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
      if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
      if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
      Float_t lam=TMath::ATan(par[3]); 
      Float_t pt_1=TMath::Abs(par[4]);

      if (TMath::Abs(gt[ngood].code)==11 && ptg>4.) {
         hmpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
      } else {
         Float_t phig=TMath::ATan2(gt[ngood].py,gt[ngood].px);
         hp->Fill((phi - phig)*1000.);

         Float_t lamg=TMath::ATan2(gt[ngood].pz,ptg);
         hl->Fill((lam - lamg)*1000.);

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

      Float_t mom=1./(pt_1*TMath::Cos(lam));
      Float_t dedx=track->GetdEdx();
      hep->Fill(mom,dedx,1.);
      if (TMath::Abs(gt[ngood].code)==211)
	 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";
   }

   Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
   if (ng!=0) cerr<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
   cout<<"Total number of found tracks ="<<nentr<<endl;
   cout<<"Total number of \"good\" tracks ="
       <<mingood<<"   (selected for comparison: "<<ng<<')'<<endl<<endl;


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

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

   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)"); 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)"); 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("(%)"); 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("(%)"); 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"); 
   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();

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

   delete rl;
   return 0;
}


Int_t 
good_tracks_tpc(GoodTrackTPC *gt, const Int_t max, const char* evfoldname) {
   Int_t nt=0;

   AliRunLoader *rl = AliRunLoader::GetRunLoader(evfoldname);
   if (rl == 0x0) {
      ::Fatal("AliTPCComparison.C::good_tracks_tpc",
              "Can not find Run Loader in Folder Named %s",
              evfoldname);
   }
   AliTPCLoader *tpcl = (AliTPCLoader *)rl->GetLoader("TPCLoader");
   if (tpcl == 0x0) {
       ::Fatal("AliTPCHits2Digits.C","Can not find TPCLoader !");
   }
   
   rl->LoadgAlice();
   
   AliTPC *TPC=(AliTPC*)rl->GetAliRun()->GetDetector("TPC");
   Int_t ver = TPC->IsVersion(); 
   cerr<<"TPC version "<<ver<<" has been found !\n";

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

   rl->LoadHeader();

   Int_t np = rl->GetHeader()->GetNtrack();
      

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


   switch (ver) {
   case 1:
     {
      tpcl->LoadRecPoints();      
      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;
      tpcl->UnloadRecPoints();
     }
     break;
   case 2:
     {
      tpcl->LoadDigits();
      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;
      tpcl->UnloadDigits();
     }
      break;
   default:
      ::Fatal("AliTPCComparison.C","Invalid TPC version !");
   }

   rl->LoadKinematics();
   AliStack* stack = rl->Stack();
   /** select tracks which are "good" enough **/
   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;

      Int_t j=p->GetFirstMother();
      if (j>=0) {
        TParticle *pp = (TParticle*)stack->Particle(j);
        if (pp == 0x0)
         {
           cerr<<"Can not get particle "<<j<<endl;
           continue;
         }
        if (pp->GetFirstMother()>=0) continue;//only one decay is allowed
	/*  for cascade hyperons only
        Int_t jj=pp->GetFirstMother();
        if (jj>=0) {
          TParticle *ppp = (TParticle*)stack->Particle(jj);
          if (ppp->GetFirstMother()>=0) continue;//two decays are allowed
        }
	*/
      }

      gt[nt].lab=i;
      gt[nt].code=p->GetPdgCode();
      gt[nt].px=0.; gt[nt].py=0.; gt[nt].pz=0.;
      gt[nt].x=0.; gt[nt].y=0.; gt[nt].z=0.;
      nt++;
      if (nt==max) {cerr<<"Too many good tracks !\n"; break;}
      cerr<<np-i<<"                \r";
   }
   rl->UnloadKinematics();

   /** check if there is also information at the entrance of the TPC **/
   
   rl->LoadTrackRefs();
   TTree *TR=rl->TreeTR();
   TBranch *branch=TR->GetBranch("TPC");
   if (branch==0) {
      ::Fatal("AliTPCComparison.C::good_tracks_tpc","No track references !");
   }
   TClonesArray *references=new TClonesArray("AliTrackReference",1000);
   branch->SetAddress(&references);
   np=(Int_t)TR->GetEntries();
   for (i=0; i<np; i++) {
      references->Clear();
      TR->GetEvent(i);
      Int_t nref=references->GetEntriesFast();
      if (nref==0) continue;
      AliTrackReference *ref=(AliTrackReference*)references->UncheckedAt(0);

      Int_t j, lab=ref->Label();
      for (j=0; j<nt; j++) {if (gt[j].lab==lab) break;}
      if (j==nt) continue;         

      // (px,py,pz) - in global coordinate system, (x,y,z) - in local !
      gt[j].px=ref->Px(); gt[j].py=ref->Py(); gt[j].pz=ref->Pz();
      gt[j].x = ref->LocalX();
      gt[j].y = ref->LocalY();
      gt[j].z = ref->Z();
   }

   delete references;
   delete[] good;
   
   tpcl->UnloadHits();
   rl->UnloadTrackRefs();
   rl->UnloadgAlice();

   gBenchmark->Stop("AliTPCComparison");
   gBenchmark->Show("AliTPCComparison");   
   return nt;
}
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. *
5102bab6	6	* The ESD tracks must be in an appropriate state (kTPCin or kTPCrefit) *
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>
	20	#include <TPad.h>
	21	#include <TCanvas.h>
	22	#include <TLine.h>
	23	#include <TText.h>
	24	#include <TBenchmark.h>
	25	#include <TStyle.h>
	26	#include <TKey.h>
	27
	28	#include "AliStack.h"
	29	#include "AliHeader.h"
	30	#include "AliTrackReference.h"
88cb7938	31	#include "AliRunLoader.h"
88cb7938	32	#include "AliMagF.h"
c630aafd	33	#include "AliRun.h"
5102bab6	34	#include "AliESD.h"
	35
	36	#include "AliSimDigits.h"
	37	#include "AliTPC.h"
	38	#include "AliTPCParamSR.h"
	39	#include "AliTPCClustersArray.h"
	40	#include "AliTPCClustersRow.h"
	41	#include "AliTPCtracker.h"
	42	#include "AliTPCLoader.h"
be9c5115	43	#endif
be9c5115	44
f38c8ae5	45	struct GoodTrackTPC {
cc80f89e	46	Int_t lab;
	47	Int_t code;
	48	Float_t px,py,pz;
	49	Float_t x,y,z;
	50	};
cc80f89e	51
5102bab6	52	Int_t good_tracks_tpc(GoodTrackTPC *gt, const Int_t max,
5102bab6	53	const char* evfoldname=AliConfig::fgkDefaultEventFolderName);
88cb7938	54
c630aafd	55	extern AliRun *gAlice;
5102bab6	56	extern TBenchmark *gBenchmark;
fbb58996	57
5102bab6	58	Int_t AliTPCComparison() {
	59	gBenchmark->Start("AliTPCComparison");
	60
	61	::Info("AliTPCComparison.C","Doing comparison...");
c630aafd	62
c630aafd	63	if (gAlice) {
88cb7938	64	delete gAlice->GetRunLoader();
	65	delete gAlice;//if everything was OK here it is already NULL
	66	gAlice = 0x0;
	67	}
	68
88cb7938	69	AliRunLoader *rl = AliRunLoader::Open("galice.root","COMPARISON");
c630aafd	70	if (!rl) {
5102bab6	71	::Fatal("AliTPCComparison.C","Can't start session !");
c630aafd	72	}
7f6ddf58	73
88cb7938	74	rl->LoadgAlice();
3cb3ee52	75	if (rl->GetAliRun())
c630aafd	76	AliKalmanTrack::SetConvConst(
	77	1000/0.299792458/rl->GetAliRun()->Field()->SolenoidField()
	78	);
	79	else {
5102bab6	80	::Fatal("AliTPCComparison.C","Can't get AliRun !");
c630aafd	81	}
3cb3ee52	82	//rl->UnloadgAlice();
88cb7938	83
afc42102	84
7f6ddf58	85	/* Generate a list of "good" tracks */
5102bab6	86	const Int_t MAX=20000;
f38c8ae5	87	GoodTrackTPC gt[MAX];
cc80f89e	88	Int_t ngood=0;
be9c5115	89	ifstream in("good_tracks_tpc");
cc80f89e	90	if (in) {
5102bab6	91	::Info("AliTPCComparison.C","Reading good tracks...");
7f6ddf58	92	while (in>>gt[ngood].lab>>gt[ngood].code>>
be9c5115	93	gt[ngood].px>>gt[ngood].py>>gt[ngood].pz>>
be9c5115	94	gt[ngood].x >>gt[ngood].y >>gt[ngood].z) {
7ac477db	95	ngood++;
7ac477db	96	if (ngood==MAX) {
5102bab6	97	::Warning("AliTPCComparison.C","Too many good tracks !");
7ac477db	98	break;
7ac477db	99	}
cc80f89e	100	}
5102bab6	101	if (!in.eof())
5102bab6	102	::Fatal("AliTPCComparison.C","Read error (good_tracks_tpc) !");
cc80f89e	103	} else {
5102bab6	104	::Info
5102bab6	105	("AliTPCComparison","Marking good tracks (this will take a while)...");
88cb7938	106	ngood=good_tracks_tpc(gt,MAX,"COMPARISON");
be9c5115	107	ofstream out("good_tracks_tpc");
cc80f89e	108	if (out) {
cc80f89e	109	for (Int_t ngd=0; ngd<ngood; ngd++)
7f6ddf58	110	out<<gt[ngd].lab<<' '<<gt[ngd].code<<' '<<
be9c5115	111	gt[ngd].px<<' '<<gt[ngd].py<<' '<<gt[ngd].pz<<' '<<
be9c5115	112	gt[ngd].x <<' '<<gt[ngd].y <<' '<<gt[ngd].z <<endl;
5102bab6	113	} else
5102bab6	114	::Fatal("AliTPCComparison.C","Can not open file (good_tracks_tpc) !");
cc80f89e	115	out.close();
cc80f89e	116	}
7f6ddf58	117
5102bab6	118	Int_t i=0; TObjArray tarray(MAX);
3cb3ee52	119	{ /Load tracks/
5102bab6	120	TFile *ef=TFile::Open("AliESDtpc.root");
	121	if ((!ef)\|\|(!ef->IsOpen())) {
	122	::Fatal("AliTPCComparison.C","Can't open AliESDtpc.root !");
	123	}
	124	TKey *key=0;
	125	TIter next(ef->GetListOfKeys());
	126	if ((key=(TKey*)next())!=0) {
	127	AliESD event=(AliESD)key->ReadObj();
	128	Int_t ntrk=event->GetNumberOfTracks();
	129	for (Int_t i=0; i<ntrk; i++) {
	130	AliESDtrack *t=event->GetTrack(i);
	131	if ((t->GetStatus()&AliESDtrack::kTPCin)==0) continue;
	132	AliTPCtrack iotrack=new AliTPCtrack(t);
	133	tarray.AddLast(iotrack);
	134	}
	135	delete event;
	136	}
	137	ef->Close();
3cb3ee52	138	}
5102bab6	139	Int_t nentr=tarray.GetEntriesFast();
7f6ddf58	140
cc80f89e	141	TH1F *hp=new TH1F("hp","PHI resolution",50,-20.,20.); hp->SetFillColor(4);
cc80f89e	142	TH1F *hl=new TH1F("hl","LAMBDA resolution",50,-20,20);hl->SetFillColor(4);
8c555625	143	TH1F *hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
8c555625	144	hpt->SetFillColor(2);
cc80f89e	145	TH1F *hmpt=new TH1F("hmpt","Relative Pt resolution (pt>4GeV/c)",30,-60,60);
cc80f89e	146	hmpt->SetFillColor(6);
8c555625	147
5102bab6	148	TH1F *hgood=new TH1F("hgood","Good tracks",30,0.2,6.1);
	149	TH1F *hfound=new TH1F("hfound","Found tracks",30,0.2,6.1);
	150	TH1F *hfake=new TH1F("hfake","Fake tracks",30,0.2,6.1);
	151	TH1F *hg=new TH1F("hg","Efficiency for good tracks",30,0.2,6.1);
8c555625	152	hg->SetLineColor(4); hg->SetLineWidth(2);
5102bab6	153	TH1F *hf=new TH1F("hf","Efficiency for fake tracks",30,0.2,6.1);
8c555625	154	hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
8c555625	155
cc80f89e	156	TH1F *he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,100.);
7f6ddf58	157	TH2F *hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,400.);
be9c5115	158	hep->SetMarkerStyle(8);
be9c5115	159	hep->SetMarkerSize(0.4);
8c555625	160
7f6ddf58	161	//MI change
	162	Int_t mingood=ngood;
	163	Int_t track_notfound[MAX], itrack_notfound=0;
	164	Int_t track_fake[MAX], itrack_fake=0;
	165	Int_t track_multifound[MAX], track_multifound_n[MAX], itrack_multifound=0;
cf98c13f	166
cc80f89e	167	while (ngood--) {
cf98c13f	168	Int_t lab=gt[ngood].lab,tlab=-1;
cc80f89e	169	Float_t ptg=
cc80f89e	170	TMath::Sqrt(gt[ngood].pxgt[ngood].px + gt[ngood].pygt[ngood].py);
8c555625	171
7f6ddf58	172	if (ptg<1e-33) continue; // for those not crossing 0 pad row
b9de75e1	173
8c555625	174	hgood->Fill(ptg);
cc80f89e	175
cf98c13f	176	AliTPCtrack *track=0;
7f6ddf58	177	for (i=0; i<nentr; i++) {
cf98c13f	178	track=(AliTPCtrack*)tarray.UncheckedAt(i);
73042f01	179	tlab=track->GetLabel();
cc80f89e	180	if (lab==TMath::Abs(tlab)) break;
8c555625	181	}
7f6ddf58	182	if (i==nentr) {
cf98c13f	183	track_notfound[itrack_notfound++]=lab;
cc80f89e	184	continue;
cc80f89e	185	}
cf98c13f	186
	187	//MI change - addition
	188	Int_t micount=0;
	189	Int_t mi;
	190	AliTPCtrack * mitrack;
7f6ddf58	191	for (mi=0; mi<nentr; mi++) {
cf98c13f	192	mitrack=(AliTPCtrack*)tarray.UncheckedAt(mi);
	193	if (lab==TMath::Abs(mitrack->GetLabel())) micount++;
	194	}
	195	if (micount>1) {
cf98c13f	196	track_multifound[itrack_multifound]=lab;
	197	track_multifound_n[itrack_multifound]=micount;
	198	itrack_multifound++;
	199	}
	200
7f6ddf58	201	Double_t xk=gt[ngood].x;
cc80f89e	202	track->PropagateTo(xk);
3c0f9266	203
cc80f89e	204	if (lab==tlab) hfound->Fill(ptg);
cf98c13f	205	else {
	206	track_fake[itrack_fake++]=lab;
	207	hfake->Fill(ptg);
cf98c13f	208	}
cc80f89e	209
be9c5115	210	Double_t par[5]; track->GetExternalParameters(xk,par);
	211	Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
	212	if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
	213	if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
	214	Float_t lam=TMath::ATan(par[3]);
	215	Float_t pt_1=TMath::Abs(par[4]);
cc80f89e	216
cc80f89e	217	if (TMath::Abs(gt[ngood].code)==11 && ptg>4.) {
be9c5115	218	hmpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
cc80f89e	219	} else {
cc80f89e	220	Float_t phig=TMath::ATan2(gt[ngood].py,gt[ngood].px);
cc80f89e	221	hp->Fill((phi - phig)*1000.);
3c0f9266	222
cc80f89e	223	Float_t lamg=TMath::ATan2(gt[ngood].pz,ptg);
cc80f89e	224	hl->Fill((lam - lamg)*1000.);
cc80f89e	225
be9c5115	226	hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
cc80f89e	227	}
73042f01	228
be9c5115	229	Float_t mom=1./(pt_1*TMath::Cos(lam));
73042f01	230	Float_t dedx=track->GetdEdx();
cc80f89e	231	hep->Fill(mom,dedx,1.);
	232	if (TMath::Abs(gt[ngood].code)==211)
	233	if (mom>0.4 && mom<0.5) {
	234	he->Fill(dedx,1.);
	235	}
73042f01	236
cc80f89e	237	}
cc80f89e	238
cf98c13f	239	cout<<"\nList of Not found tracks :\n";
cf98c13f	240	for ( i = 0; i< itrack_notfound; i++){
	241	cout<<track_notfound[i]<<"\t";
	242	if ((i%5)==4) cout<<"\n";
	243	}
	244	cout<<"\nList of fake tracks :\n";
	245	for ( i = 0; i< itrack_fake; i++){
	246	cout<<track_fake[i]<<"\t";
	247	if ((i%5)==4) cout<<"\n";
	248	}
	249	cout<<"\nList of multiple found tracks :\n";
	250	for ( i=0; i<itrack_multifound; i++) {
7f6ddf58	251	cout<<"id. "<<track_multifound[i]
7f6ddf58	252	<<" found - "<<track_multifound_n[i]<<"times\n";
cf98c13f	253	}
8c555625	254
7f6ddf58	255	Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
	256	if (ng!=0) cerr<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
	257	cout<<"Total number of found tracks ="<<nentr<<endl;
	258	cout<<"Total number of \"good\" tracks ="
	259	<<mingood<<" (selected for comparison: "<<ng<<')'<<endl<<endl;
	260
	261
8c555625	262	gStyle->SetOptStat(111110);
	263	gStyle->SetOptFit(1);
	264
	265	TCanvas *c1=new TCanvas("c1","",0,0,700,850);
	266
	267	TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
	268	p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
	269	hp->SetFillColor(4); hp->SetXTitle("(mrad)"); hp->Fit("gaus"); c1->cd();
	270
	271	TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
	272	p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
	273	hl->SetXTitle("(mrad)"); hl->Fit("gaus"); c1->cd();
	274
	275	TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
	276	p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
	277	hpt->SetXTitle("(%)"); hpt->Fit("gaus"); c1->cd();
	278
	279	TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
	280	p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
cc80f89e	281	hmpt->SetXTitle("(%)"); hmpt->Fit("gaus"); c1->cd();
8c555625	282
8c555625	283	TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
3c0f9266	284	p5->SetFillColor(41); p5->SetFrameFillColor(10);
8c555625	285	hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
	286	hg->Divide(hfound,hgood,1,1.,"b");
	287	hf->Divide(hfake,hgood,1,1.,"b");
	288	hg->SetMaximum(1.4);
	289	hg->SetYTitle("Tracking efficiency");
	290	hg->SetXTitle("Pt (GeV/c)");
	291	hg->Draw();
	292
7f6ddf58	293	TLine *line1 = new TLine(0.1,1.0,6.1,1.0); line1->SetLineStyle(4);
8c555625	294	line1->Draw("same");
7f6ddf58	295	TLine *line2 = new TLine(0.1,0.9,6.1,0.9); line2->SetLineStyle(4);
8c555625	296	line2->Draw("same");
	297
	298	hf->SetFillColor(1);
	299	hf->SetFillStyle(3013);
	300	hf->SetLineColor(2);
	301	hf->SetLineWidth(2);
	302	hf->Draw("histsame");
	303	TText *text = new TText(0.461176,0.248448,"Fake tracks");
	304	text->SetTextSize(0.05);
	305	text->Draw();
	306	text = new TText(0.453919,1.11408,"Good tracks");
	307	text->SetTextSize(0.05);
	308	text->Draw();
3c0f9266	309
	310
	311
	312	TCanvas *c2=new TCanvas("c2","",320,32,530,590);
	313
	314	TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
	315	p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
	316	he->SetFillColor(2); he->SetFillStyle(3005);
	317	he->SetXTitle("Arbitrary Units");
	318	he->Fit("gaus"); c2->cd();
	319
	320	TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
	321	p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
	322	hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
	323	hep->Draw(); c1->cd();
	324
cf98c13f	325	gBenchmark->Stop("AliTPCComparison");
	326	gBenchmark->Show("AliTPCComparison");
	327
88cb7938	328	delete rl;
73042f01	329	return 0;
cc80f89e	330	}
3c0f9266	331
cc80f89e	332
c630aafd	333	Int_t
c630aafd	334	good_tracks_tpc(GoodTrackTPC gt, const Int_t max, const char evfoldname) {
7f6ddf58	335	Int_t nt=0;
cc80f89e	336
c630aafd	337	AliRunLoader *rl = AliRunLoader::GetRunLoader(evfoldname);
c630aafd	338	if (rl == 0x0) {
88cb7938	339	::Fatal("AliTPCComparison.C::good_tracks_tpc",
	340	"Can not find Run Loader in Folder Named %s",
	341	evfoldname);
c630aafd	342	}
	343	AliTPCLoader tpcl = (AliTPCLoader )rl->GetLoader("TPCLoader");
	344	if (tpcl == 0x0) {
5102bab6	345	::Fatal("AliTPCHits2Digits.C","Can not find TPCLoader !");
c630aafd	346	}
88cb7938	347
	348	rl->LoadgAlice();
	349
	350	AliTPC TPC=(AliTPC)rl->GetAliRun()->GetDetector("TPC");
73042f01	351	Int_t ver = TPC->IsVersion();
	352	cerr<<"TPC version "<<ver<<" has been found !\n";
	353
88cb7938	354	rl->CdGAFile();
88cb7938	355	AliTPCParamSR digp=(AliTPCParamSR)gDirectory->Get("75x40_100x60_150x60");
5102bab6	356	if (!digp) {
	357	::Fatal("AliTPCHits2Digits.C","TPC parameters have not been found !");
	358	}
73042f01	359	TPC->SetParam(digp);
73042f01	360
88cb7938	361	rl->LoadHeader();
	362
	363	Int_t np = rl->GetHeader()->GetNtrack();
	364
024a7fe9	365
73042f01	366	Int_t nrow_up=digp->GetNRowUp();
	367	Int_t nrows=digp->GetNRowLow()+nrow_up;
	368	Int_t zero=digp->GetZeroSup();
7f6ddf58	369	Int_t gap=Int_t(0.125nrows), shift=Int_t(0.5gap);
cc80f89e	370	Int_t good_number=Int_t(0.4*nrows);
cc80f89e	371
7f6ddf58	372	Int_t *good=new Int_t[np];
	373	Int_t i;
	374	for (i=0; i<np; i++) good[i]=0;
	375
	376
	377	switch (ver) {
	378	case 1:
	379	{
88cb7938	380	tpcl->LoadRecPoints();
7f6ddf58	381	AliTPCClustersArray pca=new AliTPCClustersArray, &ca=pca;
	382	ca.Setup(digp);
	383	ca.SetClusterType("AliTPCcluster");
88cb7938	384	ca.ConnectTree(tpcl->TreeR());
7f6ddf58	385	Int_t nrows=Int_t(ca.GetTree()->GetEntries());
	386	for (Int_t n=0; n<nrows; n++) {
	387	AliSegmentID *s=ca.LoadEntry(n);
	388	Int_t sec,row;
	389	digp->AdjustSectorRow(s->GetID(),sec,row);
	390	AliTPCClustersRow &clrow = *ca.GetRow(sec,row);
	391	Int_t ncl=clrow.GetArray()->GetEntriesFast();
	392	while (ncl--) {
	393	AliTPCcluster c=(AliTPCcluster)clrow[ncl];
	394	Int_t lab=c->GetLabel(0);
	395	if (lab<0) continue; //noise cluster
	396	lab=TMath::Abs(lab);
	397
	398	if (sec>=digp->GetNInnerSector())
	399	if (row==nrow_up-1) good[lab]\|=0x4000;
	400	if (sec>=digp->GetNInnerSector())
	401	if (row==nrow_up-1-gap) good[lab]\|=0x1000;
	402
	403	if (sec>=digp->GetNInnerSector())
	404	if (row==nrow_up-1-shift) good[lab]\|=0x2000;
	405	if (sec>=digp->GetNInnerSector())
	406	if (row==nrow_up-1-gap-shift) good[lab]\|=0x800;
	407
	408	good[lab]++;
	409	}
	410	ca.ClearRow(sec,row);
	411	}
	412	delete pca;
88cb7938	413	tpcl->UnloadRecPoints();
7f6ddf58	414	}
afc42102	415	break;
7f6ddf58	416	case 2:
7f6ddf58	417	{
88cb7938	418	tpcl->LoadDigits();
	419	TTree *TD=tpcl->TreeD();
	420
7f6ddf58	421	AliSimDigits da, *digits=&da;
	422	TD->GetBranch("Segment")->SetAddress(&digits);
	423
	424	Int_t *count = new Int_t[np];
	425	Int_t i;
	426	for (i=0; i<np; i++) count[i]=0;
	427
	428	Int_t sectors_by_rows=(Int_t)TD->GetEntries();
	429	for (i=0; i<sectors_by_rows; i++) {
	430	if (!TD->GetEvent(i)) continue;
	431	Int_t sec,row;
	432	digp->AdjustSectorRow(digits->GetID(),sec,row);
	433	cerr<<sec<<' '<<row<<" \r";
	434	digits->First();
	435	do { //Many thanks to J.Chudoba who noticed this
	436	Int_t it=digits->CurrentRow(), ip=digits->CurrentColumn();
	437	Short_t dig = digits->GetDigit(it,ip);
	438	Int_t idx0=digits->GetTrackID(it,ip,0);
	439	Int_t idx1=digits->GetTrackID(it,ip,1);
	440	Int_t idx2=digits->GetTrackID(it,ip,2);
8ded1b7a	441	if (idx0>=0 && dig>=zero && idx0<np) count[idx0]+=1;
	442	if (idx1>=0 && dig>=zero && idx1<np) count[idx1]+=1;
	443	if (idx2>=0 && dig>=zero && idx2<np) count[idx2]+=1;
afc42102	444	} while (digits->Next());
7f6ddf58	445	for (Int_t j=0; j<np; j++) {
	446	if (count[j]>1) {
	447	if (sec>=digp->GetNInnerSector())
	448	if (row==nrow_up-1 ) good[j]\|=0x4000;
	449	if (sec>=digp->GetNInnerSector())
	450	if (row==nrow_up-1-gap) good[j]\|=0x1000;
	451
	452	if (sec>=digp->GetNInnerSector())
	453	if (row==nrow_up-1-shift) good[j]\|=0x2000;
	454	if (sec>=digp->GetNInnerSector())
	455	if (row==nrow_up-1-gap-shift) good[j]\|=0x800;
	456	good[j]++;
	457	}
	458	count[j]=0;
	459	}
	460	}
	461	delete[] count;
88cb7938	462	tpcl->UnloadDigits();
afc42102	463	}
7f6ddf58	464	break;
7f6ddf58	465	default:
5102bab6	466	::Fatal("AliTPCComparison.C","Invalid TPC version !");
cc80f89e	467	}
7f6ddf58	468
88cb7938	469	rl->LoadKinematics();
88cb7938	470	AliStack* stack = rl->Stack();
7f6ddf58	471	/ select tracks which are "good" enough /
	472	for (i=0; i<np; i++) {
	473	if ((good[i]&0x5000) != 0x5000)
	474	if ((good[i]&0x2800) != 0x2800) continue;
	475	if ((good[i]&0x7FF ) < good_number) continue;
	476
88cb7938	477	TParticle p = (TParticle)stack->Particle(i);
	478	if (p == 0x0)
	479	{
	480	cerr<<"Can not get particle "<<i<<endl;
	481	continue;
	482	}
7f6ddf58	483	if (p->Pt()<0.100) continue;
	484	if (TMath::Abs(p->Pz()/p->Pt())>0.999) continue;
	485
	486	Int_t j=p->GetFirstMother();
	487	if (j>=0) {
88cb7938	488	TParticle pp = (TParticle)stack->Particle(j);
	489	if (pp == 0x0)
	490	{
	491	cerr<<"Can not get particle "<<j<<endl;
	492	continue;
	493	}
024a7fe9	494	if (pp->GetFirstMother()>=0) continue;//only one decay is allowed
	495	/* for cascade hyperons only
	496	Int_t jj=pp->GetFirstMother();
	497	if (jj>=0) {
88cb7938	498	TParticle ppp = (TParticle)stack->Particle(jj);
024a7fe9	499	if (ppp->GetFirstMother()>=0) continue;//two decays are allowed
	500	}
	501	*/
7f6ddf58	502	}
	503
	504	gt[nt].lab=i;
	505	gt[nt].code=p->GetPdgCode();
	506	gt[nt].px=0.; gt[nt].py=0.; gt[nt].pz=0.;
527abbe9	507	gt[nt].x=0.; gt[nt].y=0.; gt[nt].z=0.;
7f6ddf58	508	nt++;
	509	if (nt==max) {cerr<<"Too many good tracks !\n"; break;}
	510	cerr<<np-i<<" \r";
	511	}
88cb7938	512	rl->UnloadKinematics();
7f6ddf58	513
7f6ddf58	514	/ check if there is also information at the entrance of the TPC /
88cb7938	515
5102bab6	516	rl->LoadTrackRefs();
	517	TTree *TR=rl->TreeTR();
	518	TBranch *branch=TR->GetBranch("TPC");
	519	if (branch==0) {
	520	::Fatal("AliTPCComparison.C::good_tracks_tpc","No track references !");
	521	}
	522	TClonesArray *references=new TClonesArray("AliTrackReference",1000);
	523	branch->SetAddress(&references);
	524	np=(Int_t)TR->GetEntries();
7f6ddf58	525	for (i=0; i<np; i++) {
5102bab6	526	references->Clear();
	527	TR->GetEvent(i);
	528	Int_t nref=references->GetEntriesFast();
	529	if (nref==0) continue;
	530	AliTrackReference ref=(AliTrackReference)references->UncheckedAt(0);
	531
	532	Int_t j, lab=ref->Label();
	533	for (j=0; j<nt; j++) {if (gt[j].lab==lab) break;}
	534	if (j==nt) continue;
	535
	536	// (px,py,pz) - in global coordinate system, (x,y,z) - in local !
	537	gt[j].px=ref->Px(); gt[j].py=ref->Py(); gt[j].pz=ref->Pz();
	538	gt[j].x = ref->LocalX();
	539	gt[j].y = ref->LocalY();
	540	gt[j].z = ref->Z();
7f6ddf58	541	}
7f6ddf58	542
5102bab6	543	delete references;
7f6ddf58	544	delete[] good;
88cb7938	545
88cb7938	546	tpcl->UnloadHits();
5102bab6	547	rl->UnloadTrackRefs();
88cb7938	548	rl->UnloadgAlice();
7f6ddf58	549
cf98c13f	550	gBenchmark->Stop("AliTPCComparison");
cf98c13f	551	gBenchmark->Show("AliTPCComparison");
cc80f89e	552	return nt;
8c555625	553	}