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 "AliITStrackV2.h"
  37   #include "AliITSclusterV2.h"
  38   #include "AliITSLoader.h"
  39 #endif
  40
  41 Int_t GoodTracksITS(const Char_t *dir=".");
  42
  43 extern AliRun *gAlice;
  44 extern TBenchmark *gBenchmark;
  45 extern TROOT *gROOT;
  46
  47 static Int_t allgood=0;
  48 static Int_t allselected=0;
  49 static Int_t allfound=0;
  50
  51 Int_t AliITSComparisonV2
  52 (Float_t ptcutl=0.2, Float_t ptcuth=10., const Char_t *dir=".", Float_t ratio=0.0) {
  53    gBenchmark->Start("AliITSComparisonV2");
  54
  55    ::Info("AliITSComparisonV2.C","Doing comparison...");
  56
  57
  58    TH1F *hp=(TH1F*)gROOT->FindObject("hp");
  59    if (!hp) hp=new TH1F("hp","PHI resolution",50,-20.,20.);
  60    hp->SetFillColor(4);
  61
  62    TH1F *hl=(TH1F*)gROOT->FindObject("hl");
  63    if (!hl) hl=new TH1F("hl","LAMBDA resolution",50,-20,20);
  64    hl->SetFillColor(4);
  65
  66    TH1F *hpt=(TH1F*)gROOT->FindObject("hpt");
  67    if (!hpt) hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
  68    hpt->SetFillColor(2);
  69
  70    TH1F *hmpt=(TH1F*)gROOT->FindObject("hmpt");
  71    if (!hmpt)
  72       hmpt=new TH1F("hmpt","Transverse impact parameter",30,-300,300);
  73    hmpt->SetFillColor(6);
  74
  75    TH1F *hz=(TH1F*)gROOT->FindObject("hz");
  76    if (!hz) hz=new TH1F("hz","Longitudinal impact parameter",30,-300,300);
  77
  78
  79
  80    TH1F *hgood=(TH1F*)gROOT->FindObject("hgood");
  81    if (!hgood) hgood=new TH1F("hgood","Good tracks",30,0.2,6.1);
  82
  83    TH1F *hfound=(TH1F*)gROOT->FindObject("hfound");
  84    if (!hfound) hfound=new TH1F("hfound","Found tracks",30,0.2,6.1);
  85
  86    TH1F *hfake=(TH1F*)gROOT->FindObject("hfake");
  87    if (!hfake) hfake=new TH1F("hfake","Fake tracks",30,0.2,6.1);
  88
  89    TH1F *hg=(TH1F*)gROOT->FindObject("hg");
  90    if (!hg) hg=new TH1F("hg","Efficiency for good tracks",30,0.2,6.1);
  91    hg->SetLineColor(4); hg->SetLineWidth(2);
  92
  93    TH1F *hf=(TH1F*)gROOT->FindObject("hf");
  94    if (!hf) hf=new TH1F("hf","Efficiency for fake tracks",30,0.2,6.1);
  95    hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
  96
  97    TH1F *he=(TH1F*)gROOT->FindObject("he");
  98    if (!he)
  99       he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,100.);
 100
 101    TH2F *hep=(TH2F*)gROOT->FindObject("hep");
 102    if (!hep) hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,400.);
 103    hep->SetMarkerStyle(8);
 104    hep->SetMarkerSize(0.4);
 105
 106
 107    Char_t fname[100];
 108    sprintf(fname,"%s/GoodTracksITS.root",dir);
 109
 110    TFile *refFile=TFile::Open(fname,"old");
 111    if (!refFile || !refFile->IsOpen()) {
 112    ::Info("AliITSComparisonV2.C","Marking good tracks (will take a while)...");
 113      if (GoodTracksITS(dir)) {
 114         ::Error("AliITSComparisonV2.C","Can't generate the reference file !");
 115         return 1;
 116      }
 117    }
 118    refFile=TFile::Open(fname,"old");
 119    if (!refFile || !refFile->IsOpen()) {
 120      ::Error("AliITSComparisonV2.C","Can't open the reference file !");
 121      return 1;
 122    }
 123
 124    TTree *itsTree=(TTree*)refFile->Get("itsTree");
 125    if (!itsTree) {
 126      ::Error("AliITSComparisonV2.C","Can't get the reference tree !");
 127      return 2;
 128    }
 129    TBranch *branch=itsTree->GetBranch("ITS");
 130    if (!branch) {
 131      ::Error("AliITSComparisonV2.C","Can't get the ITS branch !");
 132      return 3;
 133    }
 134    TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
 135    branch->SetAddress(&refs);
 136
 137
 138    sprintf(fname,"%s/AliESDs.root",dir);
 139    TFile *ef=TFile::Open(fname);
 140    if ((!ef)||(!ef->IsOpen())) {
 141       sprintf(fname,"%s/AliESDits.root",dir);
 142       ef=TFile::Open(fname);
 143       if ((!ef)||(!ef->IsOpen())) {
 144          ::Error("AliITSComparisonV2.C","Can't open AliESDits.root !");
 145          return 4;
 146       }
 147    }
 148    AliESD* event = new AliESD;
 149    TTree* esdTree = (TTree*) ef->Get("esdTree");
 150    if (!esdTree) {
 151       ::Error("AliITSComparison.C", "no ESD tree found");
 152       return 6;
 153    }
 154    esdTree->SetBranchAddress("ESD", &event);
 155
 156
 157    //******* Loop over events *********
 158    Int_t e=0;
 159    while (esdTree->GetEvent(e)) {
 160      cout<<endl<<endl<<"********* Processing event number: "<<e<<"*******\n";
 161
 162      Float_t field=event->GetMagneticField();
 163      AliKalmanTrack::SetConvConst(1000/0.299792458/field);
 164
 165      Int_t nentr=event->GetNumberOfTracks();
 166      allfound+=nentr;
 167
 168      if (itsTree->GetEvent(e++)==0) {
 169         cerr<<"No reconstructable tracks !\n";
 170         continue;
 171      }
 172
 173      Int_t ngood=refs->GetEntriesFast();
 174      allgood+=ngood;
 175
 176      const Int_t MAX=15000;
 177      Int_t notf[MAX], nnotf=0;
 178      Int_t fake[MAX], nfake=0;
 179      Int_t mult[MAX], numb[MAX], nmult=0;
 180      Int_t k;
 181      for (k=0; k<ngood; k++) {
 182         AliTrackReference *ref=(AliTrackReference*)refs->UncheckedAt(k);
 183         Int_t lab=ref->Label(), tlab=-1;
 184         Float_t ptg=TMath::Sqrt(ref->Px()*ref->Px() + ref->Py()*ref->Py());
 185
 186         if (ptg<ptcutl) continue;
 187         if (ptg>ptcuth) continue;
 188
 189         allselected++;
 190
 191         hgood->Fill(ptg);
 192
 193         AliESDtrack *esd=0;
 194         Int_t cnt=0;
 195         Int_t pipe=0;
 196         for (Int_t i=0; i<nentr; i++) {
 197            AliESDtrack *t=event->GetTrack(i);
 198            UInt_t status=t->GetStatus();
 199            UInt_t flags=AliESDtrack::kTPCin|AliESDtrack::kITSin;
 200
 201            if ((status&AliESDtrack::kITSrefit)==0) continue;
 202
 203            if ((status&flags)==status) pipe=1;
 204
 205            Int_t lbl=t->GetLabel();
 206            if (lab==TMath::Abs(lbl)) {
 207               if (cnt==0) {esd=t; tlab=lbl;}
 208               cnt++;
 209            }
 210         }
 211         if (cnt==0) {
 212            notf[nnotf++]=lab;
 213            continue;
 214         } else if (cnt>1){
 215            mult[nmult]=lab;
 216            numb[nmult]=cnt; nmult++;
 217         }
 218
 219         if (esd->GetITSFakeRatio()<ratio) tlab = TMath::Abs(tlab);
 220
 221         if (lab==tlab) hfound->Fill(ptg);
 222         else {
 223           fake[nfake++]=lab;
 224           hfake->Fill(ptg);
 225         }
 226
 227         AliITStrackV2 track(*esd);
 228         if (pipe!=0) {
 229            track.PropagateTo(3.,0.0028,65.19);
 230            track.PropagateToVertex();  // This is not "exactly" the vertex
 231         }
 232
 233         Double_t xv,par[5]; track.GetExternalParameters(xv,par);
 234         Float_t phi=TMath::ASin(par[2]) + track.GetAlpha();
 235         if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
 236         if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
 237         Float_t lam=TMath::ATan(par[3]);
 238         Float_t pt_1=TMath::Abs(par[4]);
 239
 240         Float_t phig=TMath::ATan2(ref->Py(),ref->Px());
 241         hp->Fill((phi - phig)*1000.);
 242
 243         Float_t lamg=TMath::ATan2(ref->Pz(),ptg);
 244         hl->Fill((lam - lamg)*1000.);
 245
 246         Double_t d=10000*track.GetD(ref->X(),ref->Y());
 247         hmpt->Fill(d);
 248
 249         Double_t z=10000*(track.GetZ()-ref->Z());
 250         hz->Fill(z);
 251
 252         hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
 253
 254         Float_t mom=1./(pt_1*TMath::Cos(lam));
 255         Float_t dedx=track.GetdEdx();
 256         hep->Fill(mom,dedx,1.);
 257
 258         Int_t pdg=(Int_t)ref->GetLength();  //this is particle's PDG !
 259
 260         if (TMath::Abs(pdg)==211) //pions
 261            if (mom>0.4 && mom<0.5) he->Fill(dedx,1.);
 262
 263      }
 264
 265      cout<<"\nList of Not found tracks :\n";
 266      for (k=0; k<nnotf; k++){
 267        cout<<notf[k]<<"\t";
 268        if ((k%9)==8) cout<<"\n";
 269      }
 270      cout<<"\n\nList of fake  tracks :\n";
 271      for (k=0; k<nfake; k++){
 272        cout<<fake[k]<<"\t";
 273        if ((k%9)==8) cout<<"\n";
 274      }
 275      cout<<"\n\nList of multiple found tracks :\n";
 276      for (k=0; k<nmult; k++) {
 277          cout<<"id.   "<<mult[k]
 278              <<"     found - "<<numb[k]<<"times\n";
 279      }
 280      cout<<endl;
 281
 282      cout<<"Number of found tracks : "<<nentr<<endl;
 283      cout<<"Number of \"good\" tracks : "<<ngood<<endl;
 284
 285      refs->Clear();
 286    } //***** End of the loop over events
 287
 288    delete event;
 289    ef->Close();
 290
 291    delete itsTree;
 292    refFile->Close();
 293
 294    Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
 295    if (ng!=0) cout<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
 296    cout<<"Total number selected of \"good\" tracks ="<<allselected<<endl<<endl;
 297    cout<<"Total number of found tracks ="<<allfound<<endl;
 298    cout<<"Total number of \"good\" tracks ="<<allgood<<endl;
 299    cout<<endl;
 300
 301    gStyle->SetOptStat(111110);
 302    gStyle->SetOptFit(1);
 303
 304    TCanvas *c1=new TCanvas("c1","",0,0,700,850);
 305
 306    Int_t minc=33;
 307
 308    TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
 309    p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
 310    hp->SetFillColor(4);  hp->SetXTitle("(mrad)");
 311    if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); c1->cd();
 312
 313    TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
 314    p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
 315    hl->SetXTitle("(mrad)");
 316    if (hl->GetEntries()<minc) hl->Draw(); else hl->Fit("gaus"); c1->cd();
 317
 318    TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
 319    p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
 320    hpt->SetXTitle("(%)");
 321    if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); c1->cd();
 322
 323    TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
 324    p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
 325    hmpt->SetXTitle("(micron)");
 326    if (hmpt->GetEntries()<minc) hmpt->Draw(); else hmpt->Fit("gaus");
 327    hz->Draw("same"); c1->cd();
 328
 329
 330    TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
 331    p5->SetFillColor(41); p5->SetFrameFillColor(10);
 332    hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
 333    hg->Divide(hfound,hgood,1,1.,"b");
 334    hf->Divide(hfake,hgood,1,1.,"b");
 335    hg->SetMaximum(1.4);
 336    hg->SetYTitle("Tracking efficiency");
 337    hg->SetXTitle("Pt (GeV/c)");
 338    hg->Draw();
 339
 340    TLine *line1 = new TLine(0.2,1.0,6.1,1.0); line1->SetLineStyle(4);
 341    line1->Draw("same");
 342    TLine *line2 = new TLine(0.2,0.9,6.1,0.9); line2->SetLineStyle(4);
 343    line2->Draw("same");
 344
 345    hf->SetFillColor(1);
 346    hf->SetFillStyle(3013);
 347    hf->SetLineColor(2);
 348    hf->SetLineWidth(2);
 349    hf->Draw("histsame");
 350    TText *text = new TText(0.461176,0.248448,"Fake tracks");
 351    text->SetTextSize(0.05);
 352    text->Draw();
 353    text = new TText(0.453919,1.11408,"Good tracks");
 354    text->SetTextSize(0.05);
 355    text->Draw();
 356
 357    TCanvas *c2=new TCanvas("c2","",320,32,530,590);
 358    TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
 359    p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
 360    he->SetFillColor(2); he->SetFillStyle(3005);
 361    he->SetXTitle("Arbitrary Units");
 362    if (he->GetEntries()<minc) he->Draw(); else he->Fit("gaus"); c2->cd();
 363
 364    TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
 365    p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
 366    hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
 367    hep->Draw(); c1->cd();
 368
 369    TFile fc("AliITSComparisonV2.root","RECREATE");
 370    c1->Write();
 371    c2->Write();
 372    fc.Close();
 373
 374    gBenchmark->Stop("AliITSComparisonV2");
 375    gBenchmark->Show("AliITSComparisonV2");
 376
 377    return 0;
 378 }
 379
 380
 381
 382 Int_t GoodTracksITS(const Char_t *dir) {
 383    if (gAlice) {
 384        delete gAlice->GetRunLoader();
 385        delete gAlice;//if everything was OK here it is already NULL
 386        gAlice = 0x0;
 387    }
 388
 389    Char_t fname[100];
 390    sprintf(fname,"%s/galice.root",dir);
 391
 392    AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON");
 393    if (!rl) {
 394       ::Error("GoodTracksITS","Can't start session !");
 395       return 1;
 396    }
 397
 398    rl->LoadgAlice();
 399    rl->LoadHeader();
 400    rl->LoadKinematics();
 401
 402    AliITS *ITS=(AliITS*)rl->GetAliRun()->GetDetector("ITS");
 403    if (!ITS) {
 404       ::Error("GoodTracksITS","Can't get the ITS !");
 405       delete rl;
 406       return 2;
 407    }
 408    AliITSgeom *geom=ITS->GetITSgeom();
 409    if (!geom) {
 410       ::Error("GoodTracksITS","Can't get the ITS geometry !");
 411       delete rl;
 412       return 3;
 413    }
 414
 415    AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader");
 416    if (itsl == 0x0) {
 417        ::Error("GoodTracksITS","Can not find the ITSLoader");
 418        delete rl;
 419        return 4;
 420    }
 421    itsl->LoadRecPoints();
 422
 423
 424    Int_t nev=rl->GetNumberOfEvents();
 425    ::Info("GoodTracksITS","Number of events : %d\n",nev);
 426
 427    sprintf(fname,"%s/GoodTracksTPC.root",dir);
 428    TFile *tpcFile=TFile::Open(fname);
 429    if ((!tpcFile)||(!tpcFile->IsOpen())) {
 430        ::Error("GoodTracksITS","Can't open the GoodTracksTPC.root !");
 431        delete rl;
 432        return 5;
 433    }
 434    TClonesArray dum("AliTrackReference",1000), *tpcRefs=&dum;
 435    TTree *tpcTree=(TTree*)tpcFile->Get("tpcTree");
 436    if (!tpcTree) {
 437        ::Error("GoodTracksITS","Can't get the TPC reference tree !");
 438        delete rl;
 439        return 6;
 440    }
 441    TBranch *tpcBranch=tpcTree->GetBranch("TPC");
 442    if (!tpcBranch) {
 443       ::Error("GoodTracksITS","Can't get the TPC reference branch !");
 444       delete rl;
 445       return 7;
 446    }
 447    tpcBranch->SetAddress(&tpcRefs);
 448
 449    sprintf(fname,"%s/GoodTracksITS.root",dir);
 450    TFile *itsFile=TFile::Open(fname,"recreate");
 451    TClonesArray dummy2("AliTrackReference",1000), *itsRefs=&dummy2;
 452    TTree itsTree("itsTree","Tree with info about the reconstructable ITS tracks");
 453    itsTree.Branch("ITS",&itsRefs);
 454
 455    //********  Loop over generated events
 456    for (Int_t e=0; e<nev; e++) {
 457      Int_t k;
 458
 459      rl->GetEvent(e);  itsFile->cd();
 460
 461      Int_t np = rl->GetHeader()->GetNtrack();
 462      cout<<"Event "<<e<<" Number of particles: "<<np<<endl;
 463
 464      //******** Fill the "good" masks
 465      Int_t *good=new Int_t[np]; for (k=0; k<np; k++) good[k]=0;
 466
 467      TTree *cTree=itsl->TreeR();
 468      if (!cTree) {
 469         ::Error("GoodTracksITS","Can't get the cluster tree !");
 470         delete rl;
 471         return 8;
 472      }
 473      TBranch *branch=cTree->GetBranch("Clusters");
 474      if (!branch) {
 475         ::Error("GoodTracksITS","Can't get the clusters branch !");
 476         delete rl;
 477         return 9;
 478      }
 479      TClonesArray dummy("AliITSclusterV2",10000), *clusters=&dummy;
 480      branch->SetAddress(&clusters);
 481
 482      Int_t entr=(Int_t)cTree->GetEntries();
 483      for (k=0; k<entr; k++) {
 484          cTree->GetEvent(k);
 485          Int_t ncl=clusters->GetEntriesFast(); if (ncl==0) continue;
 486          Int_t lay,lad,det;  geom->GetModuleId(k,lay,lad,det);
 487          if (lay<1 || lay>6) {
 488             ::Error("GoodTracksITS","Wrong layer !");
 489             delete rl;
 490             return 10;
 491          }
 492          while (ncl--) {
 493             AliITSclusterV2 *pnt=(AliITSclusterV2*)clusters->UncheckedAt(ncl);
 494             Int_t l0=pnt->GetLabel(0);
 495                if (l0>=np) {
 496 //               cerr<<"Wrong label: "<<l0<<endl;
 497                  continue;
 498                }
 499             Int_t l1=pnt->GetLabel(1);
 500                if (l1>=np) {
 501 //               cerr<<"Wrong label: "<<l1<<endl;
 502                  continue;
 503                }
 504             Int_t l2=pnt->GetLabel(2);
 505                if (l2>=np) {
 506 //               cerr<<"Wrong label: "<<l2<<endl;
 507                  continue;
 508                }
 509             Int_t mask=1<<(lay-1);
 510             if (l0>=0) good[l0]|=mask;
 511             if (l1>=0) good[l1]|=mask;
 512             if (l2>=0) good[l2]|=mask;
 513          }
 514          clusters->Clear();
 515      }
 516
 517
 518      //****** select tracks which are "good" enough
 519      AliStack* stack = rl->Stack();
 520
 521      tpcTree->GetEvent(e);
 522      Int_t nk=tpcRefs->GetEntriesFast();
 523      Int_t nt=0;
 524      for (k=0; k<nk; k++) {
 525         AliTrackReference *tpcRef=(AliTrackReference *)tpcRefs->UncheckedAt(k);
 526         Int_t lab=tpcRef->Label();
 527         if (good[lab] != 0x3F) continue;
 528         TParticle *p = (TParticle*)stack->Particle(lab);
 529         if (p == 0x0) {
 530            cerr<<"Can not get particle "<<lab<<endl;
 531            continue;
 532         }
 533
 534         AliTrackReference *ref=new((*itsRefs)[nt]) AliTrackReference(*tpcRef);
 535         ref->SetMomentum(p->Px(),p->Py(),p->Pz());
 536         ref->SetPosition(p->Vx(),p->Vy(),p->Vz());
 537         nt++;
 538      }
 539      tpcRefs->Clear();
 540
 541      itsTree.Fill();
 542      itsRefs->Clear();
 543
 544      delete[] good;
 545
 546    } //*** end of the loop over generated events
 547
 548    itsTree.Write();
 549    itsFile->Close();
 550
 551    delete tpcTree;
 552    tpcFile->Close();
 553
 554    delete rl;
 555    return 0;
 556 }
 557
 558