HMPID/HESDfromKin.C

   1 AliRunLoader *gAL=0;
   2 Int_t gEvt=0; Int_t gMaxEvt=0;
   3 TObjArray *pNmean;
   4 TTree *gEsdTr;
   5 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
   6 void HESDfromKin(const char *name="default")
   7 {//simulate ESD from kinematics
   8
   9   if(gSystem->IsFileInIncludePath("galice.root")){// tries to open session
  10     if(gAlice) delete gAlice;                                               //in case we execute this in aliroot delete default AliRun object
  11     gAL=AliRunLoader::Open();                                                                    //try to open galice.root from current dir
  12     gAL->LoadgAlice();                                                                           //take new AliRun object from galice.root
  13     if(gAL->LoadHeader()) return;
  14     if(gAL->LoadKinematics()) return;
  15
  16     AliLoader *pHL=gAL->GetDetectorLoader("HMPID");
  17     pHL->LoadRecPoints();
  18     AliESDEvent *pEsd = new AliESDEvent();
  19     TFile *pEsdFl=TFile::Open("AliESDs.root","recreate");
  20     gEsdTr=new TTree("esdTree","Sim ESD from kinematics");
  21     pEsd->CreateStdContent();    pEsd->WriteToTree(gEsdTr);  //clm: new ESD write schema: see Task Force meeting 20th June, 2007
  22     gEsdTr->GetUserInfo()->Add(pEsd);                        //clm: TList has to be created for ReadFromTree method -- this was not needed by the old ESD
  23
  24
  25   }  else return;
  26
  27   OpenCalib();
  28
  29   TString ttl=name;
  30   Bool_t htaCheck=ttl.Contains("HTA");
  31   if(!htaCheck) SimEsd(pHL,pEsd); else SimEsdHidden(pHL,pEsd);
  32
  33   pEsdFl->cd();
  34   pEsdFl->Write();pEsdFl->Close();
  35 }
  36 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  37 void SimEsd(AliLoader *pHL,AliESDEvent *pEsd)
  38 {
  39   Printf("-----------------------------------------------");
  40   Printf("| SimESD: Utility to embed ESD from kinematics|");
  41   Printf("-----------------------------------------------");
  42   AliHMPIDTracker::SetFieldMap(gAL->GetAliRun()->Field(),kTRUE);
  43   AliHMPID *pH=(AliHMPID*)gAL->GetAliRun()->GetDetector("HMPID");
  44   Int_t mtid=-1;
  45   Int_t iNevt=gAL->GetNumberOfEvents();
  46   Printf("Number of events to process: %i",iNevt);
  47   for(Int_t iEvt=0;iEvt<iNevt;iEvt++){//events loop
  48     if(!(iEvt%50)) Printf("Events processed %i",iEvt);
  49     gAL->GetEvent(iEvt);
  50     pHL->TreeR()->GetEntry(0);
  51     AliStack *pStack=gAL->Stack();
  52     for(Int_t i=0;i<pStack->GetNtrack();i++){
  53       TParticle *pTrack=pStack->Particle(i);
  54       mtid=pTrack->GetFirstMother();
  55       if(mtid>=0) continue; // only primaries
  56       AliESDtrack trk(pTrack);
  57       pEsd->AddTrack(&trk);
  58       AliHMPIDTracker::Recon(pEsd,pH->CluLst(),pNmean);
  59     }// track loop
  60     pEsd->SetMagneticField(AliHMPIDTracker::GetBz());
  61     gEsdTr->Fill();
  62     pEsd->Reset();
  63   }// event loop
  64   Printf("Events processed %i",iEvt);
  65   gAL->UnloadHeader();  gAL->UnloadKinematics();
  66 }//Esd()
  67 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  68 void SimEsdHidden(AliLoader *pHL,AliESDEvent *pEsd)
  69 {
  70   Double_t rd=TMath::RadToDeg();
  71   Printf("----------------------------------------------");
  72   Printf("| SimHTA:Utility to embed ESD from kinematics|");
  73   Printf("|     with  Hidden Track Algorithm (HTA)     |");
  74   Printf("----------------------------------------------");
  75   AliHMPIDTracker::SetFieldMap(gAL->GetAliRun()->Field(),kTRUE);
  76   AliHMPID *pH=(AliHMPID*)gAL->GetAliRun()->GetDetector("HMPID");
  77   Int_t mtid=-1;
  78   Int_t iNevt=gAL->GetNumberOfEvents();
  79   Printf("Number of events to process: %i",iNevt);
  80   for(Int_t iEvt=0;iEvt<iNevt;iEvt++){//events loop
  81     if(!(iEvt%50)) Printf("Events processed %i",iEvt);
  82     gAL->GetEvent(iEvt);
  83     pHL->TreeR()->GetEntry(0);
  84     AliStack *pStack=gAL->Stack();
  85     for(Int_t i=0;i<pStack->GetNtrack();i++){
  86       TParticle *pTrack=pStack->Particle(i);
  87       mtid=pTrack->GetFirstMother();
  88       if(mtid>=0) continue; // only primaries
  89       //find the chamber that intersects HMPID
  90       AliESDtrack trk(pTrack);
  91       Float_t xPc,yPc;
  92       Int_t iCh=AliHMPIDTracker::IntTrkCha(&trk,xPc,yPc);                           //get chamber intersected by this track
  93       if(iCh<0) continue;                                                           //no intersection at all, go after next track
  94       Float_t radX,radY,thetaTrk,phiTrk;
  95       trk.GetHMPIDtrk(radX,radY,thetaTrk,phiTrk);
  96       Printf("simulated track theta %f phi %f",thetaTrk*rd,phiTrk*rd);
  97       TObjArray *pClus = pH->CluLst();
  98       if(AliHMPIDTracker::ReconHiddenTrk(iCh,&trk,(TClonesArray *)pClus->At(iCh),pNmean)!=0) continue;
  99       trk.GetHMPIDtrk(radX,radY,thetaTrk,phiTrk);
 100       Printf("reconstr. track theta %f phi %f",thetaTrk*rd,phiTrk*rd);
 101       pEsd->AddTrack(&trk);
 102       Double_t thetaCerSim = TMath::ACos(pTrack->Energy()/(1.292*pTrack->P()));
 103       Printf(" theta Cerenkov simulated     %f",thetaCerSim);
 104       Printf(" theta Cerenkov reconstructed %f",trk.GetHMPIDsignal());
 105     }// track loop
 106     pEsd->SetMagneticField(AliHMPIDTracker::GetBz());
 107     gEsdTr->Fill();
 108     pEsd->Reset();
 109   }// event loop
 110   Printf("Events processed %i",iEvt);
 111   gAL->UnloadHeader();  gAL->UnloadKinematics();
 112 }//EsdHidden()
 113 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 114 void OpenCalib()
 115 {
 116   AliCDBManager* pCDB = AliCDBManager::Instance();
 117   pCDB->SetDefaultStorage("local://$HOME");
 118   AliCDBEntry *pQthreEnt=pCDB->Get("HMPID/Calib/Qthre",0);
 119   AliCDBEntry *pNmeanEnt=pCDB->Get("HMPID/Calib/Nmean",0);
 120
 121   if(!pQthreEnt || ! pNmeanEnt) return;
 122
 123   pNmean=(TObjArray*)pNmeanEnt->GetObject();
 124 }
 125 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++