ITS/UPGRADE/macros/QA/AliITSUComparison.C

   1 /****************************************************************************
   2  *          Legacy comparison macro, adapted to the upgraded ITS.           *
   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  * Before running, load the ITSU libraries:                                 *
   9  *  gSystem->Load("libITSUpgradeBase");gSystem->Load("libITSUpgradeRec");   *
  10  *                                                                          *
  11  *           Origin: I.Belikov, IPHC, Iouri.Belikov@iphc.cnrs.fr            *
  12  ****************************************************************************/
  13
  14 #if !defined(__CINT__) || defined(__MAKECINT__)
  15   #include <TMath.h>
  16   #include <TError.h>
  17   #include <Riostream.h>
  18   #include <TH1F.h>
  19   #include <TH2F.h>
  20   #include <TTree.h>
  21   #include <TParticle.h>
  22   #include <TCanvas.h>
  23   #include <TLine.h>
  24   #include <TText.h>
  25   #include <TBenchmark.h>
  26   #include <TStyle.h>
  27   #include <TFile.h>
  28   #include <TROOT.h>
  29
  30   #include "AliStack.h"
  31   #include "AliHeader.h"
  32   #include "AliTrackReference.h"
  33   #include "AliRunLoader.h"
  34   #include "AliRun.h"
  35   #include "AliESDEvent.h"
  36   #include "AliESDtrack.h"
  37
  38   #include "UPGRADE/AliITSUClusterPix.h"
  39   #include "UPGRADE/AliITSULoader.h"
  40 #endif
  41
  42 Int_t GoodTracksITS(const Char_t *dir=".");
  43
  44 extern AliRun *gAlice;
  45 extern TBenchmark *gBenchmark;
  46 extern TROOT *gROOT;
  47
  48 static Int_t allgood=0;
  49 static Int_t allselected=0;
  50 static Int_t allfound=0;
  51
  52 Int_t AliITSUComparison
  53 (Float_t ptcutl=0., Float_t ptcuth=2., const Char_t *dir=".") {
  54    gBenchmark->Start("AliITSUComparison");
  55
  56    ::Info("AliITSUComparison.C","Doing comparison...");
  57
  58
  59    TH1F *hp=(TH1F*)gROOT->FindObject("hp");
  60    if (!hp) hp=new TH1F("hp","PHI resolution",50,-20.,20.);
  61    hp->SetFillColor(4);
  62
  63    TH1F *hl=(TH1F*)gROOT->FindObject("hl");
  64    if (!hl) hl=new TH1F("hl","LAMBDA resolution",50,-20,20);
  65    hl->SetFillColor(4);
  66
  67    TH1F *hpt=(TH1F*)gROOT->FindObject("hpt");
  68    if (!hpt) hpt=new TH1F("hpt","Relative Pt resolution",30,-10.,10.);
  69    hpt->SetFillColor(2);
  70
  71    TH1F *hmpt=(TH1F*)gROOT->FindObject("hmpt");
  72    if (!hmpt)
  73       hmpt=new TH1F("hmpt","Transverse impact parameter",30,-777,777);
  74    hmpt->SetFillColor(6);
  75
  76    TH1F *hz=(TH1F*)gROOT->FindObject("hz");
  77    if (!hz) hz=new TH1F("hz","Longitudinal impact parameter",30,-777,777);
  78
  79
  80    Int_t nb=100;
  81    TH1F *hgood=(TH1F*)gROOT->FindObject("hgood");
  82    if (!hgood) hgood=new TH1F("hgood","Good tracks",nb,ptcutl,ptcuth);
  83
  84    TH1F *hfound=(TH1F*)gROOT->FindObject("hfound");
  85    if (!hfound) hfound=new TH1F("hfound","Found tracks",nb,ptcutl,ptcuth);
  86
  87    TH1F *hfake=(TH1F*)gROOT->FindObject("hfake");
  88    if (!hfake) hfake=new TH1F("hfake","Fake tracks",nb,ptcutl,ptcuth);
  89
  90    TH1F *hg=(TH1F*)gROOT->FindObject("hg");
  91    if (!hg) hg=new TH1F("hg","Efficiency for good tracks",nb,ptcutl,ptcuth);
  92    hg->SetLineColor(4); hg->SetLineWidth(2);
  93
  94    TH1F *hf=(TH1F*)gROOT->FindObject("hf");
  95    if (!hf) hf=new TH1F("hf","Efficiency for fake tracks",nb,ptcutl,ptcuth);
  96    hf->SetFillColor(1); hf->SetFillStyle(3013); hf->SetLineWidth(2);
  97
  98
  99    TH1F *he=(TH1F*)gROOT->FindObject("he");
 100    if (!he)
 101       he =new TH1F("he","dE/dX for pions with 0.4<p<0.5 GeV/c",50,0.,200.);
 102
 103    TH2F *hep=(TH2F*)gROOT->FindObject("hep");
 104    if (!hep) hep=new TH2F("hep","dE/dX vs momentum",50,0.,2.,50,0.,400.);
 105    hep->SetMarkerStyle(8);
 106    hep->SetMarkerSize(0.4);
 107
 108
 109    Char_t fname[100];
 110    sprintf(fname,"%s/GoodTracksITS.root",dir);
 111
 112    TFile *refFile=TFile::Open(fname,"old");
 113    if (!refFile || !refFile->IsOpen()) {
 114    ::Info("AliITSUComparison.C","Marking good tracks (will take a while)...");
 115      if (GoodTracksITS(dir)) {
 116         ::Error("AliITSUComparison.C","Can't generate the reference file !");
 117         return 1;
 118      }
 119    }
 120    refFile=TFile::Open(fname,"old");
 121    if (!refFile || !refFile->IsOpen()) {
 122      ::Error("AliITSUComparison.C","Can't open the reference file !");
 123      return 1;
 124    }
 125
 126    TTree *itsTree=(TTree*)refFile->Get("itsTree");
 127    if (!itsTree) {
 128      ::Error("AliITSUComparison.C","Can't get the reference tree !");
 129      return 2;
 130    }
 131    TBranch *branch=itsTree->GetBranch("ITS");
 132    if (!branch) {
 133      ::Error("AliITSUComparison.C","Can't get the ITS branch !");
 134      return 3;
 135    }
 136    TClonesArray dummy("AliTrackReference",1000), *refs=&dummy;
 137    branch->SetAddress(&refs);
 138
 139
 140    sprintf(fname,"%s/AliESDs.root",dir);
 141    TFile *ef=TFile::Open(fname);
 142    if ((!ef)||(!ef->IsOpen())) {
 143       sprintf(fname,"%s/AliESDits.root",dir);
 144       ef=TFile::Open(fname);
 145       if ((!ef)||(!ef->IsOpen())) {
 146          ::Error("AliITSUComparison.C","Can't open AliESDits.root !");
 147          return 4;
 148       }
 149    }
 150    AliESDEvent* event = new AliESDEvent();
 151    TTree* esdTree = (TTree*) ef->Get("esdTree");
 152    if (!esdTree) {
 153       ::Error("AliITSComparison.C", "no ESD tree found");
 154       return 6;
 155    }
 156    event->ReadFromTree(esdTree);
 157
 158
 159    //******* Loop over events *********
 160    Int_t e=0;
 161    while (esdTree->GetEvent(e)) {
 162      cout<<endl<<endl<<"********* Processing event number: "<<e<<"*******\n";
 163
 164      Int_t nentr=event->GetNumberOfTracks();
 165      allfound+=nentr;
 166
 167      if (itsTree->GetEvent(e++)==0) {
 168         cerr<<"No reconstructable tracks !\n";
 169         continue;
 170      }
 171
 172      Int_t ngood=refs->GetEntriesFast();
 173      allgood+=ngood;
 174
 175      const Int_t MAX=15000;
 176      Int_t notf[MAX], nnotf=0;
 177      Int_t fake[MAX], nfake=0;
 178      Int_t mult[MAX], numb[MAX], nmult=0;
 179      Int_t k;
 180      for (k=0; k<ngood; k++) {
 181         AliTrackReference *ref=(AliTrackReference*)refs->UncheckedAt(k);
 182         Int_t lab=ref->Label(), tlab=-1;
 183         Float_t ptg=TMath::Sqrt(ref->Px()*ref->Px() + ref->Py()*ref->Py());
 184
 185         if (ptg<ptcutl) continue;
 186         if (ptg>ptcuth) continue;
 187
 188         allselected++;
 189
 190         hgood->Fill(ptg);
 191
 192         AliESDtrack *esd=0;
 193         Int_t cnt=0;
 194         for (Int_t i=0; i<nentr; i++) {
 195            AliESDtrack *t=event->GetTrack(i);
 196            UInt_t status=t->GetStatus();
 197
 198            if ((status&AliESDtrack::kITSrefit)==0) continue;
 199
 200            Int_t lbl=t->GetLabel();
 201            if (lab==TMath::Abs(lbl)) {
 202               if (cnt==0) {esd=t; tlab=lbl;}
 203               if (lbl> 0) {esd=t; tlab=lbl;}
 204               cnt++;
 205            }
 206         }
 207         if (cnt==0) {
 208            notf[nnotf++]=lab;
 209            continue;
 210         } else if (cnt>1){
 211            mult[nmult]=lab;
 212            numb[nmult]=cnt; nmult++;
 213         }
 214
 215         if (lab==tlab) hfound->Fill(ptg);
 216         else {
 217           fake[nfake++]=lab;
 218           hfake->Fill(ptg);
 219         }
 220
 221         Double_t alpha=esd->GetAlpha(),xv,par[5];
 222         esd->GetExternalParameters(xv,par);
 223         Float_t phi=TMath::ASin(par[2]) + alpha;
 224         if (phi<-TMath::Pi()) phi+=2*TMath::Pi();
 225         if (phi>=TMath::Pi()) phi-=2*TMath::Pi();
 226         Float_t lam=TMath::ATan(par[3]);
 227         Float_t pt_1=TMath::Abs(par[4]);
 228
 229         Float_t phig=TMath::ATan2(ref->Py(),ref->Px());
 230         hp->Fill((phi - phig)*1000.);
 231
 232         Float_t lamg=TMath::ATan2(ref->Pz(),ptg);
 233         hl->Fill((lam - lamg)*1000.);
 234
 235         Float_t d,z; esd->GetImpactParameters(d,z);
 236         hmpt->Fill(10000*d);
 237         hz->Fill(10000*z);
 238
 239         hpt->Fill((pt_1 - 1/ptg)/(1/ptg)*100.);
 240
 241         Float_t mom=(TMath::Abs(pt_1)>1e-5) ? 1./(pt_1*TMath::Cos(lam)) : 1e+5;
 242         Float_t dedx=esd->GetITSsignal();
 243         hep->Fill(mom,dedx,1.);
 244
 245         Int_t pdg=(Int_t)ref->GetLength();  //this is particle's PDG !
 246
 247         if (TMath::Abs(pdg)==211) //pions
 248            if (mom>0.4 && mom<0.5) he->Fill(dedx,1.);
 249
 250      }
 251
 252      cout<<"\nList of Not found tracks :\n";
 253      for (k=0; k<nnotf; k++){
 254        cout<<notf[k]<<"\t";
 255        if ((k%9)==8) cout<<"\n";
 256      }
 257      cout<<"\n\nList of fake  tracks :\n";
 258      for (k=0; k<nfake; k++){
 259        cout<<fake[k]<<"\t";
 260        if ((k%9)==8) cout<<"\n";
 261      }
 262      cout<<"\n\nList of multiple found tracks :\n";
 263      for (k=0; k<nmult; k++) {
 264          cout<<"id.   "<<mult[k]
 265              <<"     found - "<<numb[k]<<"times\n";
 266      }
 267      cout<<endl;
 268
 269      cout<<"Number of found tracks : "<<nentr<<endl;
 270      cout<<"Number of \"good\" tracks : "<<ngood<<endl;
 271
 272      refs->Clear();
 273    } //***** End of the loop over events
 274
 275    delete event;
 276    delete esdTree;
 277    ef->Close();
 278
 279    delete itsTree;
 280    refFile->Close();
 281
 282    Stat_t ng=hgood->GetEntries(), nf=hfound->GetEntries();
 283    if (ng!=0) cout<<"\n\nIntegral efficiency is about "<<nf/ng*100.<<" %\n";
 284    cout<<"Total number selected of \"good\" tracks ="<<allselected<<endl<<endl;
 285    cout<<"Total number of found tracks ="<<allfound<<endl;
 286    cout<<"Total number of \"good\" tracks ="<<allgood<<endl;
 287    cout<<endl;
 288
 289    gStyle->SetOptStat(111110);
 290    gStyle->SetOptFit(1);
 291
 292    TCanvas *c1=new TCanvas("c1","",0,0,700,850);
 293
 294    Int_t minc=33;
 295
 296    TPad *p1=new TPad("p1","",0,0.3,.5,.6); p1->Draw();
 297    p1->cd(); p1->SetFillColor(42); p1->SetFrameFillColor(10);
 298    hp->SetFillColor(4);  hp->SetXTitle("(mrad)");
 299    if (hp->GetEntries()<minc) hp->Draw(); else hp->Fit("gaus"); c1->cd();
 300
 301    TPad *p2=new TPad("p2","",0.5,.3,1,.6); p2->Draw();
 302    p2->cd(); p2->SetFillColor(42); p2->SetFrameFillColor(10);
 303    hl->SetXTitle("(mrad)");
 304    if (hl->GetEntries()<minc) hl->Draw(); else hl->Fit("gaus"); c1->cd();
 305
 306    TPad *p3=new TPad("p3","",0,0,0.5,0.3); p3->Draw();
 307    p3->cd(); p3->SetFillColor(42); p3->SetFrameFillColor(10);
 308    hpt->SetXTitle("(%)");
 309    if (hpt->GetEntries()<minc) hpt->Draw(); else hpt->Fit("gaus"); c1->cd();
 310
 311    TPad *p4=new TPad("p4","",0.5,0,1,0.3); p4->Draw();
 312    p4->cd(); p4->SetFillColor(42); p4->SetFrameFillColor(10);
 313    hmpt->SetXTitle("(micron)");
 314    if (hmpt->GetEntries()<minc) hmpt->Draw(); else hmpt->Fit("gaus");
 315    hz->Draw("same"); c1->cd();
 316
 317
 318    TPad *p5=new TPad("p5","",0,0.6,1,1); p5->Draw(); p5->cd();
 319    p5->SetFillColor(41); p5->SetFrameFillColor(10);
 320    hfound->Sumw2(); hgood->Sumw2(); hfake->Sumw2();
 321    hg->Divide(hfound,hgood,1,1.,"b");
 322    hf->Divide(hfake,hgood,1,1.,"b");
 323    hg->SetMaximum(1.4);
 324    hg->SetYTitle("Tracking efficiency");
 325    hg->SetXTitle("Pt (GeV/c)");
 326    hg->Draw();
 327
 328    TLine *line1 = new TLine(ptcutl,1.0,ptcuth,1.0); line1->SetLineStyle(4);
 329    line1->Draw("same");
 330    TLine *line2 = new TLine(ptcutl,0.9,ptcuth,0.9); line2->SetLineStyle(4);
 331    line2->Draw("same");
 332
 333    hf->SetFillColor(1);
 334    hf->SetFillStyle(3013);
 335    hf->SetLineColor(2);
 336    hf->SetLineWidth(2);
 337    hf->Draw("histsame");
 338    TText *text = new TText(0.461176,0.248448,"Fake tracks");
 339    text->SetTextSize(0.05);
 340    text->Draw();
 341    text = new TText(0.453919,1.11408,"Good tracks");
 342    text->SetTextSize(0.05);
 343    text->Draw();
 344
 345    TCanvas *c2=new TCanvas("c2","",320,32,530,590);
 346    TPad *p6=new TPad("p6","",0.,0.,1.,.5); p6->Draw();
 347    p6->cd(); p6->SetFillColor(42); p6->SetFrameFillColor(10);
 348    he->SetFillColor(2); he->SetFillStyle(3005);
 349    he->SetXTitle("Arbitrary Units");
 350    if (he->GetEntries()<minc) he->Draw(); else he->Fit("gaus"); c2->cd();
 351
 352    TPad *p7=new TPad("p7","",0.,0.5,1.,1.); p7->Draw();
 353    p7->cd(); p7->SetFillColor(42); p7->SetFrameFillColor(10);
 354    hep->SetXTitle("p (Gev/c)"); hep->SetYTitle("dE/dX (Arb. Units)");
 355    hep->Draw(); c1->cd();
 356
 357    TFile fc("AliITSUComparison.root","RECREATE");
 358    c1->Write();
 359    c2->Write();
 360    fc.Close();
 361
 362    gBenchmark->Stop("AliITSUComparison");
 363    gBenchmark->Show("AliITSUComparison");
 364
 365    return 0;
 366 }
 367
 368
 369
 370 Int_t GoodTracksITS(const Char_t *dir) {
 371    if (gAlice) {
 372        delete AliRunLoader::Instance();
 373        delete gAlice;//if everything was OK here it is already NULL
 374        gAlice = 0x0;
 375    }
 376
 377    Char_t fname[100];
 378    sprintf(fname,"%s/galice.root",dir);
 379
 380    AliRunLoader *rl = AliRunLoader::Open(fname,"COMPARISON");
 381    if (!rl) {
 382       ::Error("GoodTracksITS","Can't start session !");
 383       return 1;
 384    }
 385
 386    rl->LoadgAlice();
 387    rl->LoadHeader();
 388    rl->LoadKinematics();
 389
 390    AliITSULoader* itsl = (AliITSULoader*)rl->GetLoader("ITSLoader");
 391    if (itsl == 0x0) {
 392        ::Error("GoodTracksITS","Can not find the ITSLoader");
 393        delete rl;
 394        return 4;
 395    }
 396    itsl->LoadRecPoints();
 397
 398
 399    Int_t nev=rl->GetNumberOfEvents();
 400    ::Info("GoodTracksITS","Number of events : %d\n",nev);
 401
 402    sprintf(fname,"%s/GoodTracksTPC.root",dir);
 403    TFile *tpcFile=TFile::Open(fname);
 404    if ((!tpcFile)||(!tpcFile->IsOpen())) {
 405        ::Error("GoodTracksITS","Can't open the GoodTracksTPC.root !");
 406        delete rl;
 407        return 5;
 408    }
 409    TClonesArray dum("AliTrackReference",1000), *tpcRefs=&dum;
 410    TTree *tpcTree=(TTree*)tpcFile->Get("tpcTree");
 411    if (!tpcTree) {
 412        ::Error("GoodTracksITS","Can't get the TPC reference tree !");
 413        delete rl;
 414        return 6;
 415    }
 416    TBranch *tpcBranch=tpcTree->GetBranch("TPC");
 417    if (!tpcBranch) {
 418       ::Error("GoodTracksITS","Can't get the TPC reference branch !");
 419       delete rl;
 420       return 7;
 421    }
 422    tpcBranch->SetAddress(&tpcRefs);
 423
 424    sprintf(fname,"%s/GoodTracksITS.root",dir);
 425    TFile *itsFile=TFile::Open(fname,"recreate");
 426    TClonesArray dummy2("AliTrackReference",1000), *itsRefs=&dummy2;
 427    TTree itsTree("itsTree","Tree with info about the reconstructable ITS tracks");
 428    itsTree.Branch("ITS",&itsRefs);
 429
 430    //********  Loop over generated events
 431    for (Int_t e=0; e<nev; e++) {
 432      Int_t k;
 433
 434      rl->GetEvent(e);  itsFile->cd();
 435
 436      Int_t np = rl->GetHeader()->GetNtrack();
 437      cout<<"Event "<<e<<" Number of particles: "<<np<<endl;
 438
 439      //******** Fill the "good" masks
 440      Int_t *good=new Int_t[np]; for (k=0; k<np; k++) good[k]=0;
 441
 442      TTree *cTree=itsl->TreeR();
 443      if (!cTree) {
 444         ::Error("GoodTracksITS","Can't get the cluster tree !");
 445         delete rl;
 446         return 8;
 447      }
 448
 449      const Int_t nLayers=7;
 450      TBranch *branch[nLayers];
 451      TClonesArray clusters[nLayers];
 452      for (Int_t layer=0; layer<nLayers; layer++) {
 453        TClonesArray *ptr =
 454        new(clusters+layer) TClonesArray("AliITSUClusterPix",1000);
 455        Char_t bname[33];
 456        sprintf(bname,"ITSRecPoints%d\0",layer);
 457        branch[layer]=cTree->GetBranch(bname);
 458        if (!branch[layer]) {
 459           ::Error("GoodTracksITS","Can't get the clusters branch !");
 460           delete rl;
 461           return 9;
 462        }
 463        branch[layer]->SetAddress(&ptr);
 464      }
 465
 466      Int_t entr=(Int_t)cTree->GetEntries();
 467      for (k=0; k<entr; k++) {
 468          cTree->GetEvent(k);
 469          for (Int_t lay=0; lay<nLayers; lay++) {
 470              Int_t ncl=clusters[lay].GetEntriesFast(); if (ncl==0) continue;
 471              while (ncl--) {
 472                 AliITSUClusterPix *pnt=
 473                 (AliITSUClusterPix*)clusters[lay].UncheckedAt(ncl);
 474                 Int_t l0=pnt->GetLabel(0);
 475                 if (l0>=np) {
 476 //                 cerr<<"Wrong label: "<<l0<<endl;
 477                    continue;
 478                 }
 479                 Int_t l1=pnt->GetLabel(1);
 480                 if (l1>=np) {
 481 //                 cerr<<"Wrong label: "<<l1<<endl;
 482                    continue;
 483                 }
 484                 Int_t l2=pnt->GetLabel(2);
 485                 if (l2>=np) {
 486 //                 cerr<<"Wrong label: "<<l2<<endl;
 487                    continue;
 488                 }
 489                 Int_t mask=1<<lay;
 490                 if (l0>=0) good[l0]|=mask;
 491                 if (l1>=0) good[l1]|=mask;
 492                 if (l2>=0) good[l2]|=mask;
 493              }
 494              clusters[lay].Clear();
 495          }
 496      }
 497
 498
 499
 500      //****** select tracks which are "good" enough
 501      AliStack* stack = rl->Stack();
 502
 503      tpcTree->GetEvent(e);
 504      Int_t nk=tpcRefs->GetEntriesFast();
 505      Int_t nt=0;
 506      for (k=0; k<nk; k++) {
 507         AliTrackReference *tpcRef=(AliTrackReference *)tpcRefs->UncheckedAt(k);
 508         Int_t lab=tpcRef->Label();
 509         if (good[lab] != 0x7F) continue;
 510         TParticle *p = (TParticle*)stack->Particle(lab);
 511         if (p == 0x0) {
 512            cerr<<"Can not get particle "<<lab<<endl;
 513            continue;
 514         }
 515
 516         AliTrackReference *ref=new((*itsRefs)[nt]) AliTrackReference(*tpcRef);
 517         ref->SetMomentum(p->Px(),p->Py(),p->Pz());
 518         ref->SetPosition(p->Vx(),p->Vy(),p->Vz());
 519         nt++;
 520      }
 521      tpcRefs->Clear();
 522
 523      itsTree.Fill();
 524      itsRefs->Clear();
 525
 526      delete[] good;
 527
 528    } //*** end of the loop over generated events
 529
 530    itsTree.Write();
 531    itsFile->Close();
 532
 533    delete tpcTree;
 534    tpcFile->Close();
 535
 536    delete rl;
 537    return 0;
 538 }
 539
 540