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 "AliESD.h"
  33
  34   #include "AliITS.h"
  35   #include "AliITSgeom.h"
  36   #include "AliITSRecPoint.h"
  37   #include "AliITSLoader.h"
  38 #endif
  39
  40 Int_t GoodTracksITS(const Char_t *dir=".");
  41
  42 extern AliRun *gAlice;
  43 extern TBenchmark *gBenchmark;
  44 extern TROOT *gROOT;
  45
  46 static Int_t allgood=0;
  47 static Int_t allselected=0;
  48 static Int_t allfound=0;
  49
  50 Int_t AliITSComparisonV2
  51 (Float_t ptcutl=0.2, Float_t ptcuth=10., const Char_t *dir=".", Float_t ratio=0.0) {
  52    gBenchmark->Start("AliITSComparisonV2");
  53
  54    ::Info("AliITSComparisonV2.C","Doing comparison...");
  55
  56
  57    TH1F *hp=(TH1F*)gROOT->FindObject("hp");
  58    if (!hp) hp=new TH1F("hp","PHI resolution",50,-20.,20.);
  59    hp->SetFillColor(4);
  60
  61    TH1F *hl=(TH1F*)gROOT->FindObject("hl");
  62    if (!hl) hl=new TH1F("hl","LAMBDA resolution",50,-20,20);
  63    hl->SetFillColor(4);
  64
  65    TH1F *hpt=(TH1F*)gROOT->FindObject("hpt");
  66    if (!hpt) hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
  67    hpt->SetFillColor(2);
  68
  69    TH1F *hmpt=(TH1F*)gROOT->FindObject("hmpt");
  70    if (!hmpt)
  71       hmpt=new TH1F("hmpt","Transverse impact parameter",30,-777,777);
  72    hmpt->SetFillColor(6);
  73
  74    TH1F *hz=(TH1F*)gROOT->FindObject("hz");
  75    if (!hz) hz=new TH1F("hz","Longitudinal impact parameter",30,-777,777);
  76
  77
  78
  79    TH1F *hgood=(TH1F*)gROOT->FindObject("hgood");
  80    if (!hgood) hgood=new TH1F("hgood","Good tracks",30,0.2,6.1);
  81
  82    TH1F *hfound=(TH1F*)gROOT->FindObject("hfound");
  83    if (!hfound) hfound=new TH1F("hfound","Found tracks",30,0.2,6.1);
  84
  85    TH1F *hfake=(TH1F*)gROOT->FindObject("hfake");
  86    if (!hfake) hfake=new TH1F("hfake","Fake tracks",30,0.2,6.1);
  87
  88    TH1F *hg=(TH1F*)gROOT->FindObject("hg");
  89    if (!hg) hg=new TH1F("hg","Efficiency for good tracks",30,0.2,6.1);
  90    hg->SetLineColor(4); hg->SetLineWidth(2);
  91
  92    TH1F *hf=(TH1F*)gROOT->FindObject("hf");
  93    if (!hf) hf=new TH1F("hf","Efficiency for fake tracks",30,0.2,6.1);
  94    hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
  95
  96    TH1F *he=(TH1F*)gROOT->FindObject("he");
  97    if (!he)
  98       he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,100.);
  99
 100    TH2F *hep=(TH2F*)gROOT->FindObject("hep");
 101    if (!hep) hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,400.);
 102    hep->SetMarkerStyle(8);
 103    hep->SetMarkerSize(0.4);
 104
 105
 106    Char_t fname[100];
 107    sprintf(fname,"%s/GoodTracksITS.root",dir);
 108
 109    TFile *refFile=TFile::Open(fname,"old");
 110    if (!refFile || !refFile->IsOpen()) {
 111    ::Info("AliITSComparisonV2.C","Marking good tracks (will take a while)...");
 112      if (GoodTracksITS(dir)) {
 113         ::Error("AliITSComparisonV2.C","Can't generate the reference file !");
 114         return 1;
 115      }
 116    }
 117    refFile=TFile::Open(fname,"old");
 118    if (!refFile || !refFile->IsOpen()) {
 119      ::Error("AliITSComparisonV2.C","Can't open the reference file !");
 120      return 1;
 121    }
 122
 123    TTree *itsTree=(TTree*)refFile->Get("itsTree");
 124    if (!itsTree) {
 125      ::Error("AliITSComparisonV2.C","Can't get the reference tree !");
 126      return 2;
 127    }
 128    TBranch *branch=itsTree->GetBranch("ITS");
 129    if (!branch) {
 130      ::Error("AliITSComparisonV2.C","Can't get the ITS branch !");
 131      return 3;
 132    }
 133    TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
 134    branch->SetAddress(&refs);
 135
 136
 137    sprintf(fname,"%s/AliESDs.root",dir);
 138    TFile *ef=TFile::Open(fname);
 139    if ((!ef)||(!ef->IsOpen())) {
 140       sprintf(fname,"%s/AliESDits.root",dir);
 141       ef=TFile::Open(fname);
 142       if ((!ef)||(!ef->IsOpen())) {
 143          ::Error("AliITSComparisonV2.C","Can't open AliESDits.root !");
 144          return 4;
 145       }
 146    }
 147    AliESD* event = new AliESD;
 148    TTree* esdTree = (TTree*) ef->Get("esdTree");
 149    if (!esdTree) {
 150       ::Error("AliITSComparison.C", "no ESD tree found");
 151       return 6;
 152    }
 153    esdTree->SetBranchAddress("ESD", &event);
 154
 155
 156    //******* Loop over events *********
 157    Int_t e=0;
 158    while (esdTree->GetEvent(e)) {
 159      cout<<endl<<endl<<"********* Processing event number: "<<e<<"*******\n";
 160
 161      Int_t nentr=event->GetNumberOfTracks();
 162      allfound+=nentr;
 163
 164      if (itsTree->GetEvent(e++)==0) {
 165         cerr<<"No reconstructable tracks !\n";
 166         continue;
 167      }
 168
 169      Int_t ngood=refs->GetEntriesFast();
 170      allgood+=ngood;
 171
 172      const Int_t MAX=15000;
 173      Int_t notf[MAX], nnotf=0;
 174      Int_t fake[MAX], nfake=0;
 175      Int_t mult[MAX], numb[MAX], nmult=0;
 176      Int_t k;
 177      for (k=0; k<ngood; k++) {
 178         AliTrackReference *ref=(AliTrackReference*)refs->UncheckedAt(k);
 179         Int_t lab=ref->Label(), tlab=-1;
 180         Float_t ptg=TMath::Sqrt(ref->Px()*ref->Px() + ref->Py()*ref->Py());
 181
 182         if (ptg<ptcutl) continue;
 183         if (ptg>ptcuth) continue;
 184
 185         allselected++;
 186
 187         hgood->Fill(ptg);
 188
 189         AliESDtrack *esd=0;
 190         Int_t cnt=0;
 191         for (Int_t i=0; i<nentr; i++) {
 192            AliESDtrack *t=event->GetTrack(i);
 193            UInt_t status=t->GetStatus();
 194
 195            if ((status&AliESDtrack::kITSrefit)==0) continue;
 196
 197            Int_t lbl=t->GetLabel();
 198            if (lab==TMath::Abs(lbl)) {
 199               if (cnt==0) {esd=t; tlab=lbl;}
 200               cnt++;
 201            }
 202         }
 203         if (cnt==0) {
 204            notf[nnotf++]=lab;
 205            continue;
 206         } else if (cnt>1){
 207            mult[nmult]=lab;
 208            numb[nmult]=cnt; nmult++;
 209         }
 210
 211         if (esd->GetITSFakeRatio()<ratio) tlab = TMath::Abs(tlab);
 212
 213         if (lab==tlab) hfound->Fill(ptg);
 214         else {
 215           fake[nfake++]=lab;
 216           hfake->Fill(ptg);
 217         }
 218
 219         Double_t alpha=esd->GetAlpha(),xv,par[5];
 220         esd->GetExternalParameters(xv,par);
 221         Float_t phi=TMath::ASin(par[2]) + alpha;
 222         if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
 223         if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
 224         Float_t lam=TMath::ATan(par[3]);
 225         Float_t pt_1=TMath::Abs(par[4]);
 226
 227         Float_t phig=TMath::ATan2(ref->Py(),ref->Px());
 228         hp->Fill((phi - phig)*1000.);
 229
 230         Float_t lamg=TMath::ATan2(ref->Pz(),ptg);
 231         hl->Fill((lam - lamg)*1000.);
 232
 233         Float_t d,z; esd->GetImpactParameters(d,z);
 234         hmpt->Fill(10000*d);
 235         hz->Fill(10000*z);
 236
 237         hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
 238
 239         Float_t mom=1./(pt_1*TMath::Cos(lam));
 240         Float_t dedx=esd->GetITSsignal();
 241         hep->Fill(mom,dedx,1.);
 242
 243         Int_t pdg=(Int_t)ref->GetLength();  //this is particle's PDG !
 244
 245         if (TMath::Abs(pdg)==211) //pions
 246            if (mom>0.4 && mom<0.5) he->Fill(dedx,1.);
 247
 248      }
 249
 250      cout<<"\nList of Not found tracks :\n";
 251      for (k=0; k<nnotf; k++){
 252        cout<<notf[k]<<"\t";
 253        if ((k%9)==8) cout<<"\n";
 254      }
 255      cout<<"\n\nList of fake  tracks :\n";
 256      for (k=0; k<nfake; k++){
 257        cout<<fake[k]<<"\t";
 258        if ((k%9)==8) cout<<"\n";
 259      }
 260      cout<<"\n\nList of multiple found tracks :\n";
 261      for (k=0; k<nmult; k++) {
 262          cout<<"id.   "<<mult[k]
 263              <<"     found - "<<numb[k]<<"times\n";
 264      }
 265      cout<<endl;
 266
 267      cout<<"Number of found tracks : "<<nentr<<endl;
 268      cout<<"Number of \"good\" tracks : "<<ngood<<endl;
 269
 270      refs->Clear();
 271    } //***** End of the loop over events
 272
 273    delete event;
 274    ef->Close();
 275
 276    delete itsTree;
 277    refFile->Close();
 278
 279    Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
 280    if (ng!=0) cout<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
 281    cout<<"Total number selected of \"good\" tracks ="<<allselected<<endl<<endl;
 282    cout<<"Total number of found tracks ="<<allfound<<endl;
 283    cout<<"Total number of \"good\" tracks ="<<allgood<<endl;
 284    cout<<endl;
 285
 286    gStyle->SetOptStat(111110);
 287    gStyle->SetOptFit(1);
 288
 289    TCanvas *c1=new TCanvas("c1","",0,0,700,850);
 290
 291    Int_t minc=33;
 292
 293    TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
 294    p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
 295    hp->SetFillColor(4);  hp->SetXTitle("(mrad)");
 296    if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); c1->cd();
 297
 298    TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
 299    p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
 300    hl->SetXTitle("(mrad)");
 301    if (hl->GetEntries()<minc) hl->Draw(); else hl->Fit("gaus"); c1->cd();
 302
 303    TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
 304    p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
 305    hpt->SetXTitle("(%)");
 306    if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); c1->cd();
 307
 308    TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
 309    p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
 310    hmpt->SetXTitle("(micron)");
 311    if (hmpt->GetEntries()<minc) hmpt->Draw(); else hmpt->Fit("gaus");
 312    hz->Draw("same"); c1->cd();
 313
 314
 315    TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
 316    p5->SetFillColor(41); p5->SetFrameFillColor(10);
 317    hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
 318    hg->Divide(hfound,hgood,1,1.,"b");
 319    hf->Divide(hfake,hgood,1,1.,"b");
 320    hg->SetMaximum(1.4);
 321    hg->SetYTitle("Tracking efficiency");
 322    hg->SetXTitle("Pt (GeV/c)");
 323    hg->Draw();
 324
 325    TLine *line1 = new TLine(0.2,1.0,6.1,1.0); line1->SetLineStyle(4);
 326    line1->Draw("same");
 327    TLine *line2 = new TLine(0.2,0.9,6.1,0.9); line2->SetLineStyle(4);
 328    line2->Draw("same");
 329
 330    hf->SetFillColor(1);
 331    hf->SetFillStyle(3013);
 332    hf->SetLineColor(2);
 333    hf->SetLineWidth(2);
 334    hf->Draw("histsame");
 335    TText *text = new TText(0.461176,0.248448,"Fake tracks");
 336    text->SetTextSize(0.05);
 337    text->Draw();
 338    text = new TText(0.453919,1.11408,"Good tracks");
 339    text->SetTextSize(0.05);
 340    text->Draw();
 341
 342    TCanvas *c2=new TCanvas("c2","",320,32,530,590);
 343    TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
 344    p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
 345    he->SetFillColor(2); he->SetFillStyle(3005);
 346    he->SetXTitle("Arbitrary Units");
 347    if (he->GetEntries()<minc) he->Draw(); else he->Fit("gaus"); c2->cd();
 348
 349    TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
 350    p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
 351    hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
 352    hep->Draw(); c1->cd();
 353
 354    TFile fc("AliITSComparisonV2.root","RECREATE");
 355    c1->Write();
 356    c2->Write();
 357    fc.Close();
 358
 359    gBenchmark->Stop("AliITSComparisonV2");
 360    gBenchmark->Show("AliITSComparisonV2");
 361
 362    return 0;
 363 }
 364
 365
 366
 367 Int_t GoodTracksITS(const Char_t *dir) {
 368    if (gAlice) {
 369        delete gAlice->GetRunLoader();
 370        delete gAlice;//if everything was OK here it is already NULL
 371        gAlice = 0x0;
 372    }
 373
 374    Char_t fname[100];
 375    sprintf(fname,"%s/galice.root",dir);
 376
 377    AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON");
 378    if (!rl) {
 379       ::Error("GoodTracksITS","Can't start session !");
 380       return 1;
 381    }
 382
 383    rl->LoadgAlice();
 384    rl->LoadHeader();
 385    rl->LoadKinematics();
 386
 387    AliITS *ITS=(AliITS*)rl->GetAliRun()->GetDetector("ITS");
 388    if (!ITS) {
 389       ::Error("GoodTracksITS","Can't get the ITS !");
 390       delete rl;
 391       return 2;
 392    }
 393    AliITSgeom *geom=ITS->GetITSgeom();
 394    if (!geom) {
 395       ::Error("GoodTracksITS","Can't get the ITS geometry !");
 396       delete rl;
 397       return 3;
 398    }
 399
 400    AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader");
 401    if (itsl == 0x0) {
 402        ::Error("GoodTracksITS","Can not find the ITSLoader");
 403        delete rl;
 404        return 4;
 405    }
 406    itsl->LoadRecPoints();
 407
 408
 409    Int_t nev=rl->GetNumberOfEvents();
 410    ::Info("GoodTracksITS","Number of events : %d\n",nev);
 411
 412    sprintf(fname,"%s/GoodTracksTPC.root",dir);
 413    TFile *tpcFile=TFile::Open(fname);
 414    if ((!tpcFile)||(!tpcFile->IsOpen())) {
 415        ::Error("GoodTracksITS","Can't open the GoodTracksTPC.root !");
 416        delete rl;
 417        return 5;
 418    }
 419    TClonesArray dum("AliTrackReference",1000), *tpcRefs=&dum;
 420    TTree *tpcTree=(TTree*)tpcFile->Get("tpcTree");
 421    if (!tpcTree) {
 422        ::Error("GoodTracksITS","Can't get the TPC reference tree !");
 423        delete rl;
 424        return 6;
 425    }
 426    TBranch *tpcBranch=tpcTree->GetBranch("TPC");
 427    if (!tpcBranch) {
 428       ::Error("GoodTracksITS","Can't get the TPC reference branch !");
 429       delete rl;
 430       return 7;
 431    }
 432    tpcBranch->SetAddress(&tpcRefs);
 433
 434    sprintf(fname,"%s/GoodTracksITS.root",dir);
 435    TFile *itsFile=TFile::Open(fname,"recreate");
 436    TClonesArray dummy2("AliTrackReference",1000), *itsRefs=&dummy2;
 437    TTree itsTree("itsTree","Tree with info about the reconstructable ITS tracks");
 438    itsTree.Branch("ITS",&itsRefs);
 439
 440    //********  Loop over generated events
 441    for (Int_t e=0; e<nev; e++) {
 442      Int_t k;
 443
 444      rl->GetEvent(e);  itsFile->cd();
 445
 446      Int_t np = rl->GetHeader()->GetNtrack();
 447      cout<<"Event "<<e<<" Number of particles: "<<np<<endl;
 448
 449      //******** Fill the "good" masks
 450      Int_t *good=new Int_t[np]; for (k=0; k<np; k++) good[k]=0;
 451
 452      TTree *cTree=itsl->TreeR();
 453      if (!cTree) {
 454         ::Error("GoodTracksITS","Can't get the cluster tree !");
 455         delete rl;
 456         return 8;
 457      }
 458      TBranch *branch=cTree->GetBranch("ITSRecPoints");
 459      if (!branch) {
 460         ::Error("GoodTracksITS","Can't get the clusters branch !");
 461         delete rl;
 462         return 9;
 463      }
 464      TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
 465      branch->SetAddress(&clusters);
 466
 467      Int_t entr=(Int_t)cTree->GetEntries();
 468      for (k=0; k<entr; k++) {
 469          cTree->GetEvent(k);
 470          Int_t ncl=clusters->GetEntriesFast(); if (ncl==0) continue;
 471          Int_t lay,lad,det;  geom->GetModuleId(k,lay,lad,det);
 472          if (lay<1 || lay>6) {
 473             ::Error("GoodTracksITS","Wrong layer !");
 474             delete rl;
 475             return 10;
 476          }
 477          while (ncl--) {
 478             AliITSRecPoint *pnt=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
 479             Int_t l0=pnt->GetLabel(0);
 480                if (l0>=np) {
 481 //               cerr<<"Wrong label: "<<l0<<endl;
 482                  continue;
 483                }
 484             Int_t l1=pnt->GetLabel(1);
 485                if (l1>=np) {
 486 //               cerr<<"Wrong label: "<<l1<<endl;
 487                  continue;
 488                }
 489             Int_t l2=pnt->GetLabel(2);
 490                if (l2>=np) {
 491 //               cerr<<"Wrong label: "<<l2<<endl;
 492                  continue;
 493                }
 494             Int_t mask=1<<(lay-1);
 495             if (l0>=0) good[l0]|=mask;
 496             if (l1>=0) good[l1]|=mask;
 497             if (l2>=0) good[l2]|=mask;
 498          }
 499          clusters->Clear();
 500      }
 501
 502
 503      //****** select tracks which are "good" enough
 504      AliStack* stack = rl->Stack();
 505
 506      tpcTree->GetEvent(e);
 507      Int_t nk=tpcRefs->GetEntriesFast();
 508      Int_t nt=0;
 509      for (k=0; k<nk; k++) {
 510         AliTrackReference *tpcRef=(AliTrackReference *)tpcRefs->UncheckedAt(k);
 511         Int_t lab=tpcRef->Label();
 512         if (good[lab] != 0x3F) continue;
 513         TParticle *p = (TParticle*)stack->Particle(lab);
 514         if (p == 0x0) {
 515            cerr<<"Can not get particle "<<lab<<endl;
 516            continue;
 517         }
 518
 519         AliTrackReference *ref=new((*itsRefs)[nt]) AliTrackReference(*tpcRef);
 520         ref->SetMomentum(p->Px(),p->Py(),p->Pz());
 521         ref->SetPosition(p->Vx(),p->Vy(),p->Vz());
 522         nt++;
 523      }
 524      tpcRefs->Clear();
 525
 526      itsTree.Fill();
 527      itsRefs->Clear();
 528
 529      delete[] good;
 530
 531    } //*** end of the loop over generated events
 532
 533    itsTree.Write();
 534    itsFile->Close();
 535
 536    delete tpcTree;
 537    tpcFile->Close();
 538
 539    delete rl;
 540    return 0;
 541 }
 542
 543