[u/mrichter/AliRoot.git] / ITS / AliITSComparisonV2.C

#ifndef __CINT__
  #include <iostream.h>
  #include <fstream.h>

  #include "AliRun.h"
  #include "AliITS.h"
  #include "AliITSgeom.h"
  #include "AliITStrackerV2.h"
  #include "AliITStrackV2.h"
  #include "AliITSclusterV2.h"

  #include "TFile.h"
  #include "TTree.h"
  #include "TH1.h"
  #include "TObjArray.h"
  #include "TStyle.h"
  #include "TCanvas.h"
  #include "TLine.h"
  #include "TText.h"
  #include "TParticle.h"
#endif

struct GoodTrack {
  Int_t lab;
  Int_t code;
  Float_t px,py,pz;
  Float_t x,y,z;
};
Int_t good_tracks(GoodTrack *gt, Int_t max);

Int_t AliITSComparisonV2() {
   cerr<<"Doing comparison...\n";

   TFile *cf=TFile::Open("AliITSclustersV2.root");
   if (!cf->IsOpen()) {cerr<<"Can't open AliITSclustersV2.root !\n"; return 1;}
   AliITSgeom *geom=(AliITSgeom*)cf->Get("AliITSgeom");
   if (!geom) { cerr<<"Can't get the ITS geometry !\n"; return 2; }
   AliITStrackerV2 tracker(geom);   

// Load tracks
   TFile *tf=TFile::Open("AliITStracksV2.root");
   if (!tf->IsOpen()) {cerr<<"Can't open AliITStracksV2.root !\n"; return 3;}
   TObjArray tarray(2000);
   TTree *tracktree=(TTree*)tf->Get("ITSf");
   if (!tracktree) {cerr<<"Can't get a tree with ITS tracks !\n"; return 4;}
   TBranch *tbranch=tracktree->GetBranch("tracks");
   Int_t nentr=(Int_t)tracktree->GetEntries(),i;
   for (i=0; i<nentr; i++) {
       AliITStrackV2 *iotrack=new AliITStrackV2;
       tbranch->SetAddress(&iotrack);
       tracktree->GetEvent(i);

       Int_t tpcLabel=iotrack->GetLabel();
       tracker.CookLabel(iotrack,0.);
       Int_t itsLabel=iotrack->GetLabel();
       if (itsLabel != tpcLabel) iotrack->SetLabel(-TMath::Abs(itsLabel));
       if (tpcLabel < 0)         iotrack->SetLabel(-TMath::Abs(itsLabel));
       /*
       if (itsLabel==1234) {
         Int_t nc=iotrack->GetNumberOfClusters();
         for (Int_t k=0; k<nc; k++) {
           Int_t index=iotrack->GetClusterIndex(k);
           AliITSclusterV2 *c=tracker.GetCluster(index);
           cout<<c->GetLabel(0)<<' '<<c->GetLabel(1)<<' '<<c->GetLabel(2)<<endl;
         }
       }
       */
       tarray.AddLast(iotrack);
   }   
   tf->Close();
   cf->Close();

/////////////////////////////////////////////////////////////////////////
   GoodTrack gt[15000];
   Int_t ngood=0;
   ifstream in("good_tracks_its");
   if (in) {
      cerr<<"Reading good tracks...\n";
      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++;
         cerr<<ngood<<'\r';
         if (ngood==15000) {
            cerr<<"Too many good tracks !\n";
            break;
         }
      }
      if (!in.eof()) cerr<<"Read error (good_tracks_its) !\n";
   } else {
      cerr<<"Marking good tracks (this will take a while)...\n";
      ngood=good_tracks(gt,15000);
      ofstream out("good_tracks_its");
      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 cerr<<"Can not open file (good_tracks_its) !\n";
      out.close();
   }
   cerr<<"Number of good tracks : "<<ngood<<endl;

   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","Transverse impact parameter",30,-300,300); 
   hmpt->SetFillColor(6);
   TH1F *hz=new TH1F("hz","Longitudinal impact parameter",30,-300,300); 
   //hmpt->SetFillColor(6);

   AliITStrackV2 *trk=(AliITStrackV2*)tarray.UncheckedAt(0);
   Double_t pmin=0.1*(100/0.299792458/0.2/trk->GetConvConst());
   Double_t pmax=6.0+pmin;

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

   TH1F *hptw=new TH1F("hptw","Weghted pt",30,pmax,pmin);

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

      if (ptg<pmin) continue;

      hgood->Fill(ptg);

      AliITStrackV2 *track=0;
      Int_t j;
      for (j=0; j<nentr; j++) {
          track=(AliITStrackV2*)tarray.UncheckedAt(j);
          tlab=track->GetLabel();
          if (lab==TMath::Abs(tlab)) break;
      }
      if (j==nentr) {
	cerr<<"Track "<<lab<<" was not found !\n";
        continue;
      }
      track->Propagate(track->GetAlpha(),3.,0.1/65.19*1.848,0.1*1.848);
      track->PropagateToVertex();

      if (lab==tlab) hfound->Fill(ptg);
      else { hfake->Fill(ptg); cerr<<lab<<" fake\n";}

      Double_t xv,par[5]; track->GetExternalParameters(xv,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]);

      Double_t phig=TMath::ATan2(pyg,pxg);
      hp->Fill((phi - phig)*1000.);

      Double_t lamg=TMath::ATan2(pzg,ptg);
      hl->Fill((lam - lamg)*1000.);

      Double_t d=10000*track->GetD();
      hmpt->Fill(d);

      hptw->Fill(ptg,TMath::Abs(d));

      Double_t z=10000*track->GetZ();
      hz->Fill(z);

//if (TMath::Abs(gt[ngood].code)==11 && ptg>4.)
      hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);

   }

   Stat_t ng=hgood->GetEntries(); cerr<<"Good tracks "<<ng<<endl;
   Stat_t nf=hfound->GetEntries();
   if (ng!=0) 
      cerr<<"Integral efficiency is about "<<nf/ng*100.<<" %\n";

   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("(micron)"); hmpt->Fit("gaus"); hz->Draw("same"); c1->cd();
   //hfound->Sumw2();
   //hptw->Sumw2(); 
   //hg->SetMaximum(333);
   //hg->SetYTitle("Impact Parameter Resolution (micron)");
   //hg->SetXTitle("Pt (GeV/c)");
   //hg->GetXaxis()->SetRange(0,10);
   //hg->Divide(hptw,hfound,1,1.);
   //hg->DrawCopy(); 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(pmin,1.0,pmax,1.0); line1->SetLineStyle(4);
   line1->Draw("same");
   TLine *line2 = new TLine(pmin,0.9,pmax,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();

   return 0;
}

Int_t good_tracks(GoodTrack *gt, Int_t max) {
   if (gAlice) {delete gAlice; gAlice=0;}

   TFile *file=TFile::Open("galice.root");
   if (!file->IsOpen()) {cerr<<"Can't open galice.root !\n"; exit(4);}
   if (!(gAlice=(AliRun*)file->Get("gAlice"))) {
     cerr<<"gAlice have not been found on galice.root !\n";
     exit(5);
   }

   Int_t np=gAlice->GetEvent(0);

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

   AliITS *ITS=(AliITS*)gAlice->GetDetector("ITS");
   if (!ITS) {
      cerr<<"can't get ITS !\n"; exit(8);
   }
   AliITSgeom *geom=ITS->GetITSgeom();
   if (!geom) {
      cerr<<"cen't get ITS geometry !\n"; exit(9);
   }

   TFile *cf=TFile::Open("AliITSclustersV2.root");
   if (!cf->IsOpen()){
      cerr<<"Can't open AliITSclustersV2.root !\n"; exit(6);
   }
   TTree *cTree=(TTree*)cf->Get("cTree");
   if (!cTree) {
      cerr<<"Can't get cTree !\n"; exit(7);
   }
   TBranch *branch=cTree->GetBranch("Clusters");
   if (!branch) {
      cerr<<"Can't get clusters branch !\n"; exit(8);
   }
   TClonesArray *clusters=new TClonesArray("AliITSclusterV2",10000);
   branch->SetAddress(&clusters);

   Int_t entr=(Int_t)cTree->GetEntries();
   for (k=0; k<entr; k++) {
     if (!cTree->GetEvent(k)) continue;
     Int_t lay,lad,det;  geom->GetModuleId(k,lay,lad,det);
     if (lay<1 || lay>6) {
	cerr<<"wrong layer !\n"; exit(10);
     }
     Int_t ncl=clusters->GetEntriesFast();
     while (ncl--) {
        AliITSclusterV2 *pnt=(AliITSclusterV2*)clusters->UncheckedAt(ncl);
        Int_t l0=pnt->GetLabel(0);
        Int_t l1=pnt->GetLabel(1);
        Int_t l2=pnt->GetLabel(2);
        Int_t mask=1<<(lay-1);
        if (l0>=0) good[l0]|=mask; 
        if (l1>=0) good[l1]|=mask; 
        if (l2>=0) good[l2]|=mask;
     }
   }
   clusters->Delete(); delete clusters;
   cf->Close();

   ifstream in("good_tracks_tpc");
   if (!in) {
     cerr<<"can't get good_tracks_tpc !\n"; exit(11);
   }
   Int_t nt=0;
   Double_t px,py,pz,x,y,z;
   Int_t code,lab;
   while (in>>lab>>code>>px>>py>>pz>>x>>y>>z) {
      if (good[lab] != 0x3F) continue;
      TParticle *p = (TParticle*)gAlice->Particle(lab);
      gt[nt].lab=lab;
      gt[nt].code=p->GetPdgCode();
//**** px py pz - in global coordinate system
      gt[nt].px=p->Px(); gt[nt].py=p->Py(); gt[nt].pz=p->Pz();
      gt[nt].x=gt[nt].y=gt[nt].z=0.;
      nt++;
      if (nt==max) {cerr<<"Too many good tracks !\n"; break;}
   }

   delete[] good;

   delete gAlice; gAlice=0;
   file->Close();

   return nt;
}
Commit	Line	Data
006b5f7f	1	#ifndef __CINT__
	2	#include <iostream.h>
	3	#include <fstream.h>
	4
	5	#include "AliRun.h"
	6	#include "AliITS.h"
	7	#include "AliITSgeom.h"
	8	#include "AliITStrackerV2.h"
	9	#include "AliITStrackV2.h"
	10	#include "AliITSclusterV2.h"
	11
	12	#include "TFile.h"
	13	#include "TTree.h"
	14	#include "TH1.h"
	15	#include "TObjArray.h"
	16	#include "TStyle.h"
	17	#include "TCanvas.h"
	18	#include "TLine.h"
	19	#include "TText.h"
	20	#include "TParticle.h"
	21	#endif
	22
	23	struct GoodTrack {
	24	Int_t lab;
	25	Int_t code;
	26	Float_t px,py,pz;
	27	Float_t x,y,z;
	28	};
	29	Int_t good_tracks(GoodTrack *gt, Int_t max);
	30
	31	Int_t AliITSComparisonV2() {
	32	cerr<<"Doing comparison...\n";
	33
	34	TFile *cf=TFile::Open("AliITSclustersV2.root");
	35	if (!cf->IsOpen()) {cerr<<"Can't open AliITSclustersV2.root !\n"; return 1;}
	36	AliITSgeom geom=(AliITSgeom)cf->Get("AliITSgeom");
	37	if (!geom) { cerr<<"Can't get the ITS geometry !\n"; return 2; }
	38	AliITStrackerV2 tracker(geom);
	39
	40	// Load tracks
	41	TFile *tf=TFile::Open("AliITStracksV2.root");
	42	if (!tf->IsOpen()) {cerr<<"Can't open AliITStracksV2.root !\n"; return 3;}
	43	TObjArray tarray(2000);
14825d5a	44	TTree tracktree=(TTree)tf->Get("ITSf");
14825d5a	45	if (!tracktree) {cerr<<"Can't get a tree with ITS tracks !\n"; return 4;}
006b5f7f	46	TBranch *tbranch=tracktree->GetBranch("tracks");
	47	Int_t nentr=(Int_t)tracktree->GetEntries(),i;
	48	for (i=0; i<nentr; i++) {
	49	AliITStrackV2 *iotrack=new AliITStrackV2;
	50	tbranch->SetAddress(&iotrack);
	51	tracktree->GetEvent(i);
	52
	53	Int_t tpcLabel=iotrack->GetLabel();
	54	tracker.CookLabel(iotrack,0.);
	55	Int_t itsLabel=iotrack->GetLabel();
	56	if (itsLabel != tpcLabel) iotrack->SetLabel(-TMath::Abs(itsLabel));
	57	if (tpcLabel < 0) iotrack->SetLabel(-TMath::Abs(itsLabel));
	58	/*
	59	if (itsLabel==1234) {
	60	Int_t nc=iotrack->GetNumberOfClusters();
	61	for (Int_t k=0; k<nc; k++) {
	62	Int_t index=iotrack->GetClusterIndex(k);
	63	AliITSclusterV2 *c=tracker.GetCluster(index);
	64	cout<<c->GetLabel(0)<<' '<<c->GetLabel(1)<<' '<<c->GetLabel(2)<<endl;
	65	}
	66	}
	67	*/
	68	tarray.AddLast(iotrack);
	69	}
	70	tf->Close();
	71	cf->Close();
	72
	73	/////////////////////////////////////////////////////////////////////////
	74	GoodTrack gt[15000];
	75	Int_t ngood=0;
	76	ifstream in("good_tracks_its");
	77	if (in) {
	78	cerr<<"Reading good tracks...\n";
	79	while (in>>gt[ngood].lab>>gt[ngood].code>>
	80	gt[ngood].px>>gt[ngood].py>>gt[ngood].pz>>
	81	gt[ngood].x >>gt[ngood].y >>gt[ngood].z) {
	82	ngood++;
	83	cerr<<ngood<<'\r';
	84	if (ngood==15000) {
	85	cerr<<"Too many good tracks !\n";
	86	break;
	87	}
	88	}
	89	if (!in.eof()) cerr<<"Read error (good_tracks_its) !\n";
	90	} else {
	91	cerr<<"Marking good tracks (this will take a while)...\n";
	92	ngood=good_tracks(gt,15000);
	93	ofstream out("good_tracks_its");
	94	if (out) {
	95	for (Int_t ngd=0; ngd<ngood; ngd++)
	96	out<<gt[ngd].lab<<' '<<gt[ngd].code<<' '<<
	97	gt[ngd].px<<' '<<gt[ngd].py<<' '<<gt[ngd].pz<<' '<<
	98	gt[ngd].x <<' '<<gt[ngd].y <<' '<<gt[ngd].z <<endl;
	99	} else cerr<<"Can not open file (good_tracks_its) !\n";
	100	out.close();
	101	}
	102	cerr<<"Number of good tracks : "<<ngood<<endl;
	103
	104	TH1F *hp=new TH1F("hp","PHI resolution",50,-20.,20.); hp->SetFillColor(4);
	105	TH1F *hl=new TH1F("hl","LAMBDA resolution",50,-20,20);hl->SetFillColor(4);
	106	TH1F *hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
	107	hpt->SetFillColor(2);
	108	TH1F *hmpt=new TH1F("hmpt","Transverse impact parameter",30,-300,300);
	109	hmpt->SetFillColor(6);
110	TH1F *hz=new TH1F("hz","Longitudinal impact parameter",30,-300,300);
111	//hmpt->SetFillColor(6);
112
14825d5a	113	AliITStrackV2 trk=(AliITStrackV2)tarray.UncheckedAt(0);
	114	Double_t pmin=0.1*(100/0.299792458/0.2/trk->GetConvConst());
	115	Double_t pmax=6.0+pmin;
	116
	117	TH1F *hgood=new TH1F("hgood","Good tracks",30,pmin,pmax);
	118	TH1F *hfound=new TH1F("hfound","Found tracks",30,pmin,pmax);
	119	TH1F *hfake=new TH1F("hfake","Fake tracks",30,pmin,pmax);
	120	TH1F *hg=new TH1F("hg","",30,pmin,pmax); //efficiency for good tracks
006b5f7f	121	hg->SetLineColor(4); hg->SetLineWidth(2);
14825d5a	122	TH1F *hf=new TH1F("hf","Efficiency for fake tracks",30,pmin,pmax);
006b5f7f	123	hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
006b5f7f	124
14825d5a	125	TH1F *hptw=new TH1F("hptw","Weghted pt",30,pmax,pmin);
006b5f7f	126
	127	while (ngood--) {
	128	Int_t lab=gt[ngood].lab, tlab=-1;
	129	Double_t pxg=gt[ngood].px, pyg=gt[ngood].py, pzg=gt[ngood].pz;
	130	Double_t ptg=TMath::Sqrt(pxgpxg+pygpyg);
	131
14825d5a	132	if (ptg<pmin) continue;
14825d5a	133
006b5f7f	134	hgood->Fill(ptg);
	135
	136	AliITStrackV2 *track=0;
	137	Int_t j;
	138	for (j=0; j<nentr; j++) {
	139	track=(AliITStrackV2*)tarray.UncheckedAt(j);
	140	tlab=track->GetLabel();
	141	if (lab==TMath::Abs(tlab)) break;
	142	}
	143	if (j==nentr) {
	144	cerr<<"Track "<<lab<<" was not found !\n";
	145	continue;
	146	}
	147	track->Propagate(track->GetAlpha(),3.,0.1/65.191.848,0.11.848);
	148	track->PropagateToVertex();
	149
	150	if (lab==tlab) hfound->Fill(ptg);
	151	else { hfake->Fill(ptg); cerr<<lab<<" fake\n";}
	152
	153	Double_t xv,par[5]; track->GetExternalParameters(xv,par);
	154	Float_t phi=TMath::ASin(par[2]) + track->GetAlpha();
	155	if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
	156	if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
	157	Float_t lam=TMath::ATan(par[3]);
	158	Float_t pt_1=TMath::Abs(par[4]);
	159
	160	Double_t phig=TMath::ATan2(pyg,pxg);
	161	hp->Fill((phi - phig)*1000.);
	162
	163	Double_t lamg=TMath::ATan2(pzg,ptg);
	164	hl->Fill((lam - lamg)*1000.);
	165
	166	Double_t d=10000*track->GetD();
	167	hmpt->Fill(d);
	168
	169	hptw->Fill(ptg,TMath::Abs(d));
	170
	171	Double_t z=10000*track->GetZ();
	172	hz->Fill(z);
	173
	174	//if (TMath::Abs(gt[ngood].code)==11 && ptg>4.)
	175	hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
	176
	177	}
	178
	179	Stat_t ng=hgood->GetEntries(); cerr<<"Good tracks "<<ng<<endl;
	180	Stat_t nf=hfound->GetEntries();
	181	if (ng!=0)
	182	cerr<<"Integral efficiency is about "<<nf/ng*100.<<" %\n";
	183
	184	gStyle->SetOptStat(111110);
	185	gStyle->SetOptFit(1);
	186
	187	TCanvas *c1=new TCanvas("c1","",0,0,700,850);
	188
	189	TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
	190	p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
	191	hp->SetFillColor(4); hp->SetXTitle("(mrad)"); hp->Fit("gaus"); c1->cd();
	192
	193	TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
	194	p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
	195	hl->SetXTitle("(mrad)"); hl->Fit("gaus"); c1->cd();
	196
	197	TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
198	p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
199	hpt->SetXTitle("(%)"); hpt->Fit("gaus"); c1->cd();
200
201	TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
202	p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
203	hmpt->SetXTitle("(micron)"); hmpt->Fit("gaus"); hz->Draw("same"); c1->cd();
204	//hfound->Sumw2();
205	//hptw->Sumw2();
206	//hg->SetMaximum(333);
207	//hg->SetYTitle("Impact Parameter Resolution (micron)");
208	//hg->SetXTitle("Pt (GeV/c)");
209	//hg->GetXaxis()->SetRange(0,10);
210	//hg->Divide(hptw,hfound,1,1.);
211	//hg->DrawCopy(); c1->cd();
212
213
214	TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
215	p5->SetFillColor(41); p5->SetFrameFillColor(10);
216	hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
217	hg->Divide(hfound,hgood,1,1.,"b");
218	hf->Divide(hfake,hgood,1,1.,"b");
219	hg->SetMaximum(1.4);
220	hg->SetYTitle("Tracking efficiency");
221	hg->SetXTitle("Pt (GeV/c)");
222	hg->Draw();
223
14825d5a	224	TLine *line1 = new TLine(pmin,1.0,pmax,1.0); line1->SetLineStyle(4);
006b5f7f	225	line1->Draw("same");
14825d5a	226	TLine *line2 = new TLine(pmin,0.9,pmax,0.9); line2->SetLineStyle(4);
006b5f7f	227	line2->Draw("same");
	228
	229	hf->SetFillColor(1);
	230	hf->SetFillStyle(3013);
	231	hf->SetLineColor(2);
	232	hf->SetLineWidth(2);
	233	hf->Draw("histsame");
	234	TText *text = new TText(0.461176,0.248448,"Fake tracks");
	235	text->SetTextSize(0.05);
	236	text->Draw();
	237	text = new TText(0.453919,1.11408,"Good tracks");
	238	text->SetTextSize(0.05);
	239	text->Draw();
	240
	241	return 0;
	242	}
	243
	244	Int_t good_tracks(GoodTrack *gt, Int_t max) {
	245	if (gAlice) {delete gAlice; gAlice=0;}
	246
	247	TFile *file=TFile::Open("galice.root");
	248	if (!file->IsOpen()) {cerr<<"Can't open galice.root !\n"; exit(4);}
	249	if (!(gAlice=(AliRun*)file->Get("gAlice"))) {
	250	cerr<<"gAlice have not been found on galice.root !\n";
	251	exit(5);
	252	}
	253
	254	Int_t np=gAlice->GetEvent(0);
	255
	256	Int_t *good=new Int_t[np];
	257	Int_t k;
	258	for (k=0; k<np; k++) good[k]=0;
	259
	260	AliITS ITS=(AliITS)gAlice->GetDetector("ITS");
	261	if (!ITS) {
	262	cerr<<"can't get ITS !\n"; exit(8);
	263	}
	264	AliITSgeom *geom=ITS->GetITSgeom();
	265	if (!geom) {
	266	cerr<<"cen't get ITS geometry !\n"; exit(9);
	267	}
	268
	269	TFile *cf=TFile::Open("AliITSclustersV2.root");
	270	if (!cf->IsOpen()){
	271	cerr<<"Can't open AliITSclustersV2.root !\n"; exit(6);
	272	}
	273	TTree cTree=(TTree)cf->Get("cTree");
	274	if (!cTree) {
	275	cerr<<"Can't get cTree !\n"; exit(7);
	276	}
	277	TBranch *branch=cTree->GetBranch("Clusters");
	278	if (!branch) {
	279	cerr<<"Can't get clusters branch !\n"; exit(8);
	280	}
	281	TClonesArray *clusters=new TClonesArray("AliITSclusterV2",10000);
	282	branch->SetAddress(&clusters);
	283
	284	Int_t entr=(Int_t)cTree->GetEntries();
	285	for (k=0; k<entr; k++) {
	286	if (!cTree->GetEvent(k)) continue;
14825d5a	287	Int_t lay,lad,det; geom->GetModuleId(k,lay,lad,det);
006b5f7f	288	if (lay<1 \|\| lay>6) {
	289	cerr<<"wrong layer !\n"; exit(10);
	290	}
	291	Int_t ncl=clusters->GetEntriesFast();
	292	while (ncl--) {
	293	AliITSclusterV2 pnt=(AliITSclusterV2)clusters->UncheckedAt(ncl);
	294	Int_t l0=pnt->GetLabel(0);
	295	Int_t l1=pnt->GetLabel(1);
	296	Int_t l2=pnt->GetLabel(2);
	297	Int_t mask=1<<(lay-1);
	298	if (l0>=0) good[l0]\|=mask;
	299	if (l1>=0) good[l1]\|=mask;
	300	if (l2>=0) good[l2]\|=mask;
	301	}
	302	}
	303	clusters->Delete(); delete clusters;
	304	cf->Close();
	305
	306	ifstream in("good_tracks_tpc");
	307	if (!in) {
	308	cerr<<"can't get good_tracks_tpc !\n"; exit(11);
	309	}
	310	Int_t nt=0;
	311	Double_t px,py,pz,x,y,z;
	312	Int_t code,lab;
	313	while (in>>lab>>code>>px>>py>>pz>>x>>y>>z) {
	314	if (good[lab] != 0x3F) continue;
	315	TParticle p = (TParticle)gAlice->Particle(lab);
	316	gt[nt].lab=lab;
	317	gt[nt].code=p->GetPdgCode();
	318	//**** px py pz - in global coordinate system
	319	gt[nt].px=p->Px(); gt[nt].py=p->Py(); gt[nt].pz=p->Pz();
	320	gt[nt].x=gt[nt].y=gt[nt].z=0.;
	321	nt++;
	322	if (nt==max) {cerr<<"Too many good tracks !\n"; break;}
	323	}
	324
	325	delete[] good;
	326
	327	delete gAlice; gAlice=0;
	328	file->Close();
	329
	330	return nt;
	331	}
	332
	333