ITS/AliITSComparisonV2.C

   1 /****************************************************************************
   2  *           Very important, delicate and rather obscure macro.             *
   3  *                                                                          *
   4  *               Creates list of "trackable" tracks,                        *
   5  *             calculates efficiency, resolutions etc.                      *
   6  *  The ESD tracks must be in an appropriate state (kITSin or kITSrefit)    *
   7  *                                                                          *
   8  *           Origin: I.Belikov, CERN, Jouri.Belikov@cern.ch                 *
   9  ****************************************************************************/
  10
  11 #if !defined(__CINT__) || defined(__MAKECINT__)
  12   #include <TMath.h>
  13   #include <TError.h>
  14   #include <Riostream.h>
  15   #include <TH1F.h>
  16   #include <TH2F.h>
  17   #include <TTree.h>
  18   #include <TParticle.h>
  19   #include <TCanvas.h>
  20   #include <TLine.h>
  21   #include <TText.h>
  22   #include <TBenchmark.h>
  23   #include <TStyle.h>
  24   #include <TFile.h>
  25   #include <TROOT.h>
  26
  27   #include "AliStack.h"
  28   #include "AliHeader.h"
  29   #include "AliTrackReference.h"
  30   #include "AliRunLoader.h"
  31   #include "AliRun.h"
  32   #include "AliESDEvent.h"
  33   #include "AliESDtrack.h"
  34
  35   #include "AliITSRecPoint.h"
  36   #include "AliITSLoader.h"
  37 #endif
  38
  39 Int_t GoodTracksITS(const Char_t *dir=".");
  40
  41 extern AliRun *gAlice;
  42 extern TBenchmark *gBenchmark;
  43 extern TROOT *gROOT;
  44
  45 static Int_t allgood=0;
  46 static Int_t allselected=0;
  47 static Int_t allfound=0;
  48
  49 Int_t AliITSComparisonV2
  50 (Float_t ptcutl=0.2, Float_t ptcuth=10., const Char_t *dir=".") {
  51    gBenchmark->Start("AliITSComparisonV2");
  52
  53    ::Info("AliITSComparisonV2.C","Doing comparison...");
  54
  55
  56    TH1F *hp=(TH1F*)gROOT->FindObject("hp");
  57    if (!hp) hp=new TH1F("hp","PHI resolution",50,-20.,20.);
  58    hp->SetFillColor(4);
  59
  60    TH1F *hl=(TH1F*)gROOT->FindObject("hl");
  61    if (!hl) hl=new TH1F("hl","LAMBDA resolution",50,-20,20);
  62    hl->SetFillColor(4);
  63
  64    TH1F *hpt=(TH1F*)gROOT->FindObject("hpt");
  65    if (!hpt) hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
  66    hpt->SetFillColor(2);
  67
  68    TH1F *hmpt=(TH1F*)gROOT->FindObject("hmpt");
  69    if (!hmpt)
  70       hmpt=new TH1F("hmpt","Transverse impact parameter",30,-777,777);
  71    hmpt->SetFillColor(6);
  72
  73    TH1F *hz=(TH1F*)gROOT->FindObject("hz");
  74    if (!hz) hz=new TH1F("hz","Longitudinal impact parameter",30,-777,777);
  75
  76
  77
  78    TH1F *hgood=(TH1F*)gROOT->FindObject("hgood");
  79    if (!hgood) hgood=new TH1F("hgood","Good tracks",30,0.2,6.1);
  80
  81    TH1F *hfound=(TH1F*)gROOT->FindObject("hfound");
  82    if (!hfound) hfound=new TH1F("hfound","Found tracks",30,0.2,6.1);
  83
  84    TH1F *hfake=(TH1F*)gROOT->FindObject("hfake");
  85    if (!hfake) hfake=new TH1F("hfake","Fake tracks",30,0.2,6.1);
  86
  87    TH1F *hg=(TH1F*)gROOT->FindObject("hg");
  88    if (!hg) hg=new TH1F("hg","Efficiency for good tracks",30,0.2,6.1);
  89    hg->SetLineColor(4); hg->SetLineWidth(2);
  90
  91    TH1F *hf=(TH1F*)gROOT->FindObject("hf");
  92    if (!hf) hf=new TH1F("hf","Efficiency for fake tracks",30,0.2,6.1);
  93    hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
  94
  95    TH1F *he=(TH1F*)gROOT->FindObject("he");
  96    if (!he)
  97       he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,200.);
  98
  99    TH2F *hep=(TH2F*)gROOT->FindObject("hep");
 100    if (!hep) hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,400.);
 101    hep->SetMarkerStyle(8);
 102    hep->SetMarkerSize(0.4);
 103
 104
 105    Char_t fname[100];
 106    sprintf(fname,"%s/GoodTracksITS.root",dir);
 107
 108    TFile *refFile=TFile::Open(fname,"old");
 109    if (!refFile || !refFile->IsOpen()) {
 110    ::Info("AliITSComparisonV2.C","Marking good tracks (will take a while)...");
 111      if (GoodTracksITS(dir)) {
 112         ::Error("AliITSComparisonV2.C","Can't generate the reference file !");
 113         return 1;
 114      }
 115    }
 116    refFile=TFile::Open(fname,"old");
 117    if (!refFile || !refFile->IsOpen()) {
 118      ::Error("AliITSComparisonV2.C","Can't open the reference file !");
 119      return 1;
 120    }
 121
 122    TTree *itsTree=(TTree*)refFile->Get("itsTree");
 123    if (!itsTree) {
 124      ::Error("AliITSComparisonV2.C","Can't get the reference tree !");
 125      return 2;
 126    }
 127    TBranch *branch=itsTree->GetBranch("ITS");
 128    if (!branch) {
 129      ::Error("AliITSComparisonV2.C","Can't get the ITS branch !");
 130      return 3;
 131    }
 132    TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
 133    branch->SetAddress(&refs);
 134
 135
 136    sprintf(fname,"%s/AliESDs.root",dir);
 137    TFile *ef=TFile::Open(fname);
 138    if ((!ef)||(!ef->IsOpen())) {
 139       sprintf(fname,"%s/AliESDits.root",dir);
 140       ef=TFile::Open(fname);
 141       if ((!ef)||(!ef->IsOpen())) {
 142          ::Error("AliITSComparisonV2.C","Can't open AliESDits.root !");
 143          return 4;
 144       }
 145    }
 146    AliESDEvent* event = new AliESDEvent();
 147    TTree* esdTree = (TTree*) ef->Get("esdTree");
 148    if (!esdTree) {
 149       ::Error("AliITSComparison.C", "no ESD tree found");
 150       return 6;
 151    }
 152    event->ReadFromTree(esdTree);
 153
 154
 155    //******* Loop over events *********
 156    Int_t e=0;
 157    while (esdTree->GetEvent(e)) {
 158      cout<<endl<<endl<<"********* Processing event number: "<<e<<"*******\n";
 159
 160      Int_t nentr=event->GetNumberOfTracks();
 161      allfound+=nentr;
 162
 163      if (itsTree->GetEvent(e++)==0) {
 164         cerr<<"No reconstructable tracks !\n";
 165         continue;
 166      }
 167
 168      Int_t ngood=refs->GetEntriesFast();
 169      allgood+=ngood;
 170
 171      const Int_t MAX=15000;
 172      Int_t notf[MAX], nnotf=0;
 173      Int_t fake[MAX], nfake=0;
 174      Int_t mult[MAX], numb[MAX], nmult=0;
 175      Int_t k;
 176      for (k=0; k<ngood; k++) {
 177         AliTrackReference *ref=(AliTrackReference*)refs->UncheckedAt(k);
 178         Int_t lab=ref->Label(), tlab=-1;
 179         Float_t ptg=TMath::Sqrt(ref->Px()*ref->Px() + ref->Py()*ref->Py());
 180
 181         if (ptg<ptcutl) continue;
 182         if (ptg>ptcuth) continue;
 183
 184         allselected++;
 185
 186         hgood->Fill(ptg);
 187
 188         AliESDtrack *esd=0;
 189         Int_t cnt=0;
 190         for (Int_t i=0; i<nentr; i++) {
 191            AliESDtrack *t=event->GetTrack(i);
 192            UInt_t status=t->GetStatus();
 193
 194            if ((status&AliESDtrack::kITSrefit)==0) continue;
 195
 196            Int_t lbl=t->GetLabel();
 197            if (lab==TMath::Abs(lbl)) {
 198               if (cnt==0) {esd=t; tlab=lbl;}
 199               cnt++;
 200            }
 201         }
 202         if (cnt==0) {
 203            notf[nnotf++]=lab;
 204            continue;
 205         } else if (cnt>1){
 206            mult[nmult]=lab;
 207            numb[nmult]=cnt; nmult++;
 208         }
 209
 210         if (lab==tlab) hfound->Fill(ptg);
 211         else {
 212           fake[nfake++]=lab;
 213           hfake->Fill(ptg);
 214         }
 215
 216         Double_t alpha=esd->GetAlpha(),xv,par[5];
 217         esd->GetExternalParameters(xv,par);
 218         Float_t phi=TMath::ASin(par[2]) + alpha;
 219         if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
 220         if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
 221         Float_t lam=TMath::ATan(par[3]);
 222         Float_t pt_1=TMath::Abs(par[4]);
 223
 224         Float_t phig=TMath::ATan2(ref->Py(),ref->Px());
 225         hp->Fill((phi - phig)*1000.);
 226
 227         Float_t lamg=TMath::ATan2(ref->Pz(),ptg);
 228         hl->Fill((lam - lamg)*1000.);
 229
 230         Float_t d,z; esd->GetImpactParameters(d,z);
 231         hmpt->Fill(10000*d);
 232         hz->Fill(10000*z);
 233
 234         hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
 235
 236         Float_t mom=1./(pt_1*TMath::Cos(lam));
 237         Float_t dedx=esd->GetITSsignal();
 238         hep->Fill(mom,dedx,1.);
 239
 240         Int_t pdg=(Int_t)ref->GetLength();  //this is particle's PDG !
 241
 242         if (TMath::Abs(pdg)==211) //pions
 243            if (mom>0.4 && mom<0.5) he->Fill(dedx,1.);
 244
 245      }
 246
 247      cout<<"\nList of Not found tracks :\n";
 248      for (k=0; k<nnotf; k++){
 249        cout<<notf[k]<<"\t";
 250        if ((k%9)==8) cout<<"\n";
 251      }
 252      cout<<"\n\nList of fake  tracks :\n";
 253      for (k=0; k<nfake; k++){
 254        cout<<fake[k]<<"\t";
 255        if ((k%9)==8) cout<<"\n";
 256      }
 257      cout<<"\n\nList of multiple found tracks :\n";
 258      for (k=0; k<nmult; k++) {
 259          cout<<"id.   "<<mult[k]
 260              <<"     found - "<<numb[k]<<"times\n";
 261      }
 262      cout<<endl;
 263
 264      cout<<"Number of found tracks : "<<nentr<<endl;
 265      cout<<"Number of \"good\" tracks : "<<ngood<<endl;
 266
 267      refs->Clear();
 268    } //***** End of the loop over events
 269
 270    delete event;
 271    delete esdTree;
 272    ef->Close();
 273
 274    delete itsTree;
 275    refFile->Close();
 276
 277    Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
 278    if (ng!=0) cout<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
 279    cout<<"Total number selected of \"good\" tracks ="<<allselected<<endl<<endl;
 280    cout<<"Total number of found tracks ="<<allfound<<endl;
 281    cout<<"Total number of \"good\" tracks ="<<allgood<<endl;
 282    cout<<endl;
 283
 284    gStyle->SetOptStat(111110);
 285    gStyle->SetOptFit(1);
 286
 287    TCanvas *c1=new TCanvas("c1","",0,0,700,850);
 288
 289    Int_t minc=33;
 290
 291    TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
 292    p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
 293    hp->SetFillColor(4);  hp->SetXTitle("(mrad)");
 294    if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); c1->cd();
 295
 296    TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
 297    p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
 298    hl->SetXTitle("(mrad)");
 299    if (hl->GetEntries()<minc) hl->Draw(); else hl->Fit("gaus"); c1->cd();
 300
 301    TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
 302    p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
 303    hpt->SetXTitle("(%)");
 304    if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); c1->cd();
 305
 306    TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
 307    p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
 308    hmpt->SetXTitle("(micron)");
 309    if (hmpt->GetEntries()<minc) hmpt->Draw(); else hmpt->Fit("gaus");
 310    hz->Draw("same"); c1->cd();
 311
 312
 313    TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
 314    p5->SetFillColor(41); p5->SetFrameFillColor(10);
 315    hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
 316    hg->Divide(hfound,hgood,1,1.,"b");
 317    hf->Divide(hfake,hgood,1,1.,"b");
 318    hg->SetMaximum(1.4);
 319    hg->SetYTitle("Tracking efficiency");
 320    hg->SetXTitle("Pt (GeV/c)");
 321    hg->Draw();
 322
 323    TLine *line1 = new TLine(0.2,1.0,6.1,1.0); line1->SetLineStyle(4);
 324    line1->Draw("same");
 325    TLine *line2 = new TLine(0.2,0.9,6.1,0.9); line2->SetLineStyle(4);
 326    line2->Draw("same");
 327
 328    hf->SetFillColor(1);
 329    hf->SetFillStyle(3013);
 330    hf->SetLineColor(2);
 331    hf->SetLineWidth(2);
 332    hf->Draw("histsame");
 333    TText *text = new TText(0.461176,0.248448,"Fake tracks");
 334    text->SetTextSize(0.05);
 335    text->Draw();
 336    text = new TText(0.453919,1.11408,"Good tracks");
 337    text->SetTextSize(0.05);
 338    text->Draw();
 339
 340    TCanvas *c2=new TCanvas("c2","",320,32,530,590);
 341    TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
 342    p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
 343    he->SetFillColor(2); he->SetFillStyle(3005);
 344    he->SetXTitle("Arbitrary Units");
 345    if (he->GetEntries()<minc) he->Draw(); else he->Fit("gaus"); c2->cd();
 346
 347    TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
 348    p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
 349    hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
 350    hep->Draw(); c1->cd();
 351
 352    TFile fc("AliITSComparisonV2.root","RECREATE");
 353    c1->Write();
 354    c2->Write();
 355    fc.Close();
 356
 357    gBenchmark->Stop("AliITSComparisonV2");
 358    gBenchmark->Show("AliITSComparisonV2");
 359
 360    return 0;
 361 }
 362
 363
 364
 365 Int_t GoodTracksITS(const Char_t *dir) {
 366    if (gAlice) {
 367        delete gAlice->GetRunLoader();
 368        delete gAlice;//if everything was OK here it is already NULL
 369        gAlice = 0x0;
 370    }
 371
 372    Char_t fname[100];
 373    sprintf(fname,"%s/galice.root",dir);
 374
 375    AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON");
 376    if (!rl) {
 377       ::Error("GoodTracksITS","Can't start session !");
 378       return 1;
 379    }
 380
 381    rl->LoadgAlice();
 382    rl->LoadHeader();
 383    rl->LoadKinematics();
 384
 385    AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader");
 386    if (itsl == 0x0) {
 387        ::Error("GoodTracksITS","Can not find the ITSLoader");
 388        delete rl;
 389        return 4;
 390    }
 391    itsl->LoadRecPoints();
 392
 393
 394    Int_t nev=rl->GetNumberOfEvents();
 395    ::Info("GoodTracksITS","Number of events : %d\n",nev);
 396
 397    sprintf(fname,"%s/GoodTracksTPC.root",dir);
 398    TFile *tpcFile=TFile::Open(fname);
 399    if ((!tpcFile)||(!tpcFile->IsOpen())) {
 400        ::Error("GoodTracksITS","Can't open the GoodTracksTPC.root !");
 401        delete rl;
 402        return 5;
 403    }
 404    TClonesArray dum("AliTrackReference",1000), *tpcRefs=&dum;
 405    TTree *tpcTree=(TTree*)tpcFile->Get("tpcTree");
 406    if (!tpcTree) {
 407        ::Error("GoodTracksITS","Can't get the TPC reference tree !");
 408        delete rl;
 409        return 6;
 410    }
 411    TBranch *tpcBranch=tpcTree->GetBranch("TPC");
 412    if (!tpcBranch) {
 413       ::Error("GoodTracksITS","Can't get the TPC reference branch !");
 414       delete rl;
 415       return 7;
 416    }
 417    tpcBranch->SetAddress(&tpcRefs);
 418
 419    sprintf(fname,"%s/GoodTracksITS.root",dir);
 420    TFile *itsFile=TFile::Open(fname,"recreate");
 421    TClonesArray dummy2("AliTrackReference",1000), *itsRefs=&dummy2;
 422    TTree itsTree("itsTree","Tree with info about the reconstructable ITS tracks");
 423    itsTree.Branch("ITS",&itsRefs);
 424
 425    //********  Loop over generated events
 426    for (Int_t e=0; e<nev; e++) {
 427      Int_t k;
 428
 429      rl->GetEvent(e);  itsFile->cd();
 430
 431      Int_t np = rl->GetHeader()->GetNtrack();
 432      cout<<"Event "<<e<<" Number of particles: "<<np<<endl;
 433
 434      //******** Fill the "good" masks
 435      Int_t *good=new Int_t[np]; for (k=0; k<np; k++) good[k]=0;
 436
 437      TTree *cTree=itsl->TreeR();
 438      if (!cTree) {
 439         ::Error("GoodTracksITS","Can't get the cluster tree !");
 440         delete rl;
 441         return 8;
 442      }
 443      TBranch *branch=cTree->GetBranch("ITSRecPoints");
 444      if (!branch) {
 445         ::Error("GoodTracksITS","Can't get the clusters branch !");
 446         delete rl;
 447         return 9;
 448      }
 449      TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
 450      branch->SetAddress(&clusters);
 451
 452      Int_t entr=(Int_t)cTree->GetEntries();
 453      for (k=0; k<entr; k++) {
 454          cTree->GetEvent(k);
 455          Int_t ncl=clusters->GetEntriesFast(); if (ncl==0) continue;
 456          while (ncl--) {
 457             AliITSRecPoint *pnt=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
 458
 459             Int_t lay=pnt->GetLayer();
 460             if (lay<0 || lay>5) {
 461                ::Error("GoodTracksITS","Wrong layer !");
 462                delete rl;
 463                return 10;
 464             }
 465
 466             Int_t l0=pnt->GetLabel(0);
 467                if (l0>=np) {
 468 //               cerr<<"Wrong label: "<<l0<<endl;
 469                  continue;
 470                }
 471             Int_t l1=pnt->GetLabel(1);
 472                if (l1>=np) {
 473 //               cerr<<"Wrong label: "<<l1<<endl;
 474                  continue;
 475                }
 476             Int_t l2=pnt->GetLabel(2);
 477                if (l2>=np) {
 478 //               cerr<<"Wrong label: "<<l2<<endl;
 479                  continue;
 480                }
 481             Int_t mask=1<<lay;
 482             if (l0>=0) good[l0]|=mask;
 483             if (l1>=0) good[l1]|=mask;
 484             if (l2>=0) good[l2]|=mask;
 485          }
 486          clusters->Clear();
 487      }
 488
 489
 490      //****** select tracks which are "good" enough
 491      AliStack* stack = rl->Stack();
 492
 493      tpcTree->GetEvent(e);
 494      Int_t nk=tpcRefs->GetEntriesFast();
 495      Int_t nt=0;
 496      for (k=0; k<nk; k++) {
 497         AliTrackReference *tpcRef=(AliTrackReference *)tpcRefs->UncheckedAt(k);
 498         Int_t lab=tpcRef->Label();
 499         if (good[lab] != 0x3F) continue;
 500         TParticle *p = (TParticle*)stack->Particle(lab);
 501         if (p == 0x0) {
 502            cerr<<"Can not get particle "<<lab<<endl;
 503            continue;
 504         }
 505
 506         AliTrackReference *ref=new((*itsRefs)[nt]) AliTrackReference(*tpcRef);
 507         ref->SetMomentum(p->Px(),p->Py(),p->Pz());
 508         ref->SetPosition(p->Vx(),p->Vy(),p->Vz());
 509         nt++;
 510      }
 511      tpcRefs->Clear();
 512
 513      itsTree.Fill();
 514      itsRefs->Clear();
 515
 516      delete[] good;
 517
 518    } //*** end of the loop over generated events
 519
 520    itsTree.Write();
 521    itsFile->Close();
 522
 523    delete tpcTree;
 524    tpcFile->Close();
 525
 526    delete rl;
 527    return 0;
 528 }
 529
 530