+++ /dev/null
-/**************************************************************************
- * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
- * *
- * Author: The ALICE Off-line Project. *
- * Contributors are mentioned in the code where appropriate. *
- * *
- * Permission to use, copy, modify and distribute this software and its *
- * documentation strictly for non-commercial purposes is hereby granted *
- * without fee, provided that the above copyright notice appears in all *
- * copies and that both the copyright notice and this permission notice *
- * appear in the supporting documentation. The authors make no claims *
- * about the suitability of this software for any purpose. It is *
- * provided "as is" without express or implied warranty. *
- **************************************************************************/
-
-/* $Id$ */
-
-//_________________________________________________________________________
-// Implementation version v2 of the PHOS particle identifier
-// Particle identification based on the
-// - RCPV: distance from CPV recpoint to EMCA recpoint.
-// - TOF
-// - PCA: Principal Components Analisis..
-// The identified particle has an identification number corresponding
-// to a 3 bits number:
-// -Bit 0: bit set if RCPV > fCpvEmcDistance
-// -Bit 1: bit set if TOF < fTimeGate
-// -Bit 2: bit set if Principal Components are
-// inside an ellipse defined by fX_center, fY_center, fA, fB, fAngle
-//
-//
-// use case:
-// root [0] AliPHOSPIDv2 * p1 = new AliPHOSPIDv2("galice.root")
-// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
-// root [1] p1->SetIdentificationMethod("disp ellipse")
-// root [2] p1->ExecuteTask()
-// root [3] AliPHOSPIDv2 * p2 = new AliPHOSPIDv2("galice1.root","v2")
-// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
-// // reading headers from file galice1.root and create RecParticles with title v2
- // TrackSegments and RecPoints with title "v2" are used
-// // set file name for the branch RecParticles
-// root [4] p2->ExecuteTask("deb all time")
-// // available options
-// // "deb" - prints # of reconstructed particles
-// // "deb all" - prints # and list of RecParticles
-// // "time" - prints benchmarking results
-//
-// root [5] AliPHOSPIDv2 * p3 = new AliPHOSPIDv2("galice1.root","v2","v0")
-// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
-// // reading headers from file galice1.root and create RecParticles with title v2
- // RecPoints and TrackSegments with title "v0" are used
-// root [6] p3->ExecuteTask()
-//*-- Author: Yves Schutz (SUBATECH) & Gines Martinez (SUBATECH) &
-// Gustavo Conesa April 2002
-
-// --- ROOT system ---
-#include "TROOT.h"
-#include "TTree.h"
-#include "TFile.h"
-#include "TF2.h"
-#include "TFormula.h"
-#include "TCanvas.h"
-#include "TFolder.h"
-#include "TSystem.h"
-#include "TBenchmark.h"
-#include "TEllipse.h"
-#include "TPrincipal.h"
-// --- Standard library ---
-
-#include <iostream.h>
-#include <iomanip.h>
-
-// --- AliRoot header files ---
-
-#include "AliRun.h"
-#include "AliGenerator.h"
-#include "AliPHOS.h"
-#include "AliPHOSPIDv2.h"
-#include "AliPHOSClusterizerv1.h"
-#include "AliPHOSTrackSegment.h"
-#include "AliPHOSTrackSegmentMakerv1.h"
-#include "AliPHOSRecParticle.h"
-#include "AliPHOSGeometry.h"
-#include "AliPHOSGetter.h"
-
-ClassImp( AliPHOSPIDv2)
-
-//____________________________________________________________________________
-AliPHOSPIDv2::AliPHOSPIDv2():AliPHOSPID()
-{
- // default ctor
-
- fHeaderFileName = "" ;
- fTrackSegmentsTitle= "" ;
- fRecPointsTitle = "" ;
- fRecParticlesTitle = "" ;
- fRecParticlesInRun = 0 ;
- fClusterizer = 0 ;
- fTSMaker = 0 ;
- fFrom = "" ;
-
-}
-
-//____________________________________________________________________________
-AliPHOSPIDv2::AliPHOSPIDv2(const char * headerFile,const char * name, const char * from) : AliPHOSPID(headerFile, name)
-{
- //ctor with the indication on where to look for the track segments
-
- fHeaderFileName = GetTitle() ;
- fTrackSegmentsTitle = GetName() ;
- fRecPointsTitle = GetName() ;
- fRecParticlesTitle = GetName() ;
- TString tempo(GetName()) ;
- tempo.Append(":") ;
- tempo.Append(Version()) ;
- SetName(tempo) ;
- fRecParticlesInRun = 0 ;
- if ( from == 0 )
- fFrom = name ;
- else
- fFrom = from ;
- Init() ;
-
-}
-
-//____________________________________________________________________________
-AliPHOSPIDv2::~AliPHOSPIDv2()
-{
- delete [] fX;
- delete [] fP;
-}
-
-
-//____________________________________________________________________________
-Float_t AliPHOSPIDv2::GetDistance(AliPHOSEmcRecPoint * emc,AliPHOSRecPoint * cpv, Option_t * Axis)const
-{
- // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
-
- const AliPHOSGeometry * geom = AliPHOSGetter::GetInstance()->PHOSGeometry() ;
- TVector3 vecEmc ;
- TVector3 vecCpv ;
-
- emc->GetLocalPosition(vecEmc) ;
- cpv->GetLocalPosition(vecCpv) ;
- if(emc->GetPHOSMod() == cpv->GetPHOSMod()){
-
- // Correct to difference in CPV and EMC position due to different distance to center.
- // we assume, that particle moves from center
- Float_t dCPV = geom->GetIPtoOuterCoverDistance();
- Float_t dEMC = geom->GetIPtoCrystalSurface() ;
- dEMC = dEMC / dCPV ;
- vecCpv = dEMC * vecCpv - vecEmc ;
- if (Axis == "X") return vecCpv.X();
- if (Axis == "Y") return vecCpv.Y();
- if (Axis == "Z") return vecCpv.Z();
- if (Axis == "R") return vecCpv.Mag();
- }
-
- return 100000000 ;
-}
-//____________________________________________________________________________
- void AliPHOSPIDv2::SetEllipseParameters(Float_t x, Float_t y,Float_t a, Float_t b,Float_t angle)
-{
- fX_center = x ;
- fY_center = y ;
- fA = a ;
- fB = b ;
- fAngle = angle ;
-}
-
-//____________________________________________________________________________
-Int_t AliPHOSPIDv2::GetPrincipalSign(Double_t* P )const
-{
- //This method gives if the PCA of the particle are inside a defined ellipse
-
- Int_t prinsign;
- Double_t fDx = 0. ;
- Double_t fDelta = 0. ;
- Double_t fY = 0. ;
- Double_t fY_1 = 0. ;
- Double_t fY_2 = 0. ;
- Double_t fPi = TMath::Pi() ;
- Double_t fCos_Theta = TMath::Cos(fPi*fAngle/180.) ;
- Double_t fSin_Theta = TMath::Sin(fPi*fAngle/180.) ;
-
- fDx = P[0] - fX_center ;
- fDelta = 4.*fA*fA*fA*fB* (fA*fA*fCos_Theta*fCos_Theta + fB*fB*fSin_Theta*fSin_Theta - fDx*fDx) ;
- if (fDelta < 0.)
- {prinsign=0;}
-
- else if (fDelta == 0.)
- {
- fY = fCos_Theta*fSin_Theta*(fA*fA - fB*fB)*fDx / (fA*fA*fCos_Theta*fCos_Theta +
- fB*fB*fSin_Theta*fSin_Theta) ;
- fY += fY_center ;
- if(P[1]==fY )
- {prinsign=1;}
- else
- {prinsign=0;}
- }
- else
- {
- fY_1 = (fCos_Theta*fSin_Theta*(fA*fA - fB*fB) *fDx +
- TMath::Sqrt(fDelta)/2.)/(fA*fA*fCos_Theta*fCos_Theta + fB*fB*fSin_Theta*fSin_Theta) ;
- fY_2 = (fCos_Theta*fSin_Theta*(fA*fA - fB*fB) *fDx -
- TMath::Sqrt(fDelta)/2.)/(fA*fA*fCos_Theta*fCos_Theta + fB*fB*fSin_Theta*fSin_Theta) ;
- fY_1 += fY_center ;
- fY_2 += fY_center ;
- if ((P[1]<=fY_1) && (P[1]>=fY_2))
- {prinsign=1;}
- else
- {prinsign=0;}
- }
- return prinsign;
-}
-//____________________________________________________________________________
-void AliPHOSPIDv2::Exec(Option_t * option)
-{
- //Steering method
-
- if( strcmp(GetName(), "")== 0 )
- Init() ;
-
- if(strstr(option,"tim"))
- gBenchmark->Start("PHOSPID");
-
- if(strstr(option,"print")) {
- Print("") ;
- return ;
- }
-
- cout << gDirectory->GetName() << endl ;
-
- gAlice->GetEvent(0) ;
-
- //check, if the branch with name of this" already exits?
- TObjArray * lob = (TObjArray*)gAlice->TreeR()->GetListOfBranches() ;
- TIter next(lob) ;
- TBranch * branch = 0 ;
- Bool_t phospidfound = kFALSE, pidfound = kFALSE ;
-
- TString taskName(GetName()) ;
- taskName.Remove(taskName.Index(Version())-1) ;
-
- while ( (branch = (TBranch*)next()) && (!phospidfound || !pidfound) ) {
- if ( (strcmp(branch->GetName(), "PHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
- phospidfound = kTRUE ;
-
- else if ( (strcmp(branch->GetName(), "AliPHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
- pidfound = kTRUE ;
- }
-
- if ( phospidfound || pidfound ) {
- cerr << "WARNING: AliPHOSPIDv2::Exec -> RecParticles and/or PIDtMaker branch with name "
- << taskName.Data() << " already exits" << endl ;
- return ;
- }
-
- Int_t nevents = (Int_t) gAlice->TreeE()->GetEntries() ;
- Int_t ievent ;
- AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
- for(ievent = 0; ievent < nevents; ievent++){
- gime->Event(ievent,"RA") ;
-
- MakeRecParticles() ;
-
- WriteRecParticles(ievent);
-
- if(strstr(option,"deb"))
- PrintRecParticles(option) ;
-
- //increment the total number of rec particles per run
- fRecParticlesInRun += gime->RecParticles(taskName)->GetEntriesFast() ;
-
- }
-
- if(strstr(option,"tim")){
- gBenchmark->Stop("PHOSPID");
- cout << "AliPHOSPID:" << endl ;
- cout << " took " << gBenchmark->GetCpuTime("PHOSPID") << " seconds for PID "
- << gBenchmark->GetCpuTime("PHOSPID")/nevents << " seconds per event " << endl ;
- cout << endl ;
- }
-
-}
-//____________________________________________________________________________
-void AliPHOSPIDv2::Init()
-{
- // Make all memory allocations that are not possible in default constructor
- // Add the PID task to the list of PHOS tasks
-
- if ( strcmp(GetTitle(), "") == 0 )
- SetTitle("galice.root") ;
-
- TString taskName(GetName()) ;
- taskName.Remove(taskName.Index(Version())-1) ;
-
- fCpvEmcDistance = 4.0 ;
- fTimeGate = 0.162e-7 ;
-
- //PCA
- fX = new double[7]; // Data for the PCA
- fP = new double[7]; // Eigenvalues of the PCA
- fFileName = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root" ;
- TFile f( fFileName.Data(), "read" ) ;
- fPrincipal = dynamic_cast<TPrincipal*> (f.Get("principal")) ;
- f.Close() ;
- // Ellipse parameters
- fX_center = 2.0 ;
- fY_center = -0.35 ;
-
- fA = 1.9 ;
- fB = 1.0 ;
- fAngle = -60. ;
-
- AliPHOSGetter * gime = AliPHOSGetter::GetInstance(GetTitle(), fFrom.Data()) ;
-
- gime->SetRecParticlesTitle(taskName) ;
- if ( gime == 0 ) {
- cerr << "ERROR: AliPHOSPIDv2::Init -> Could not obtain the Getter object !" << endl ;
- return ;
- }
-
- gime->PostPID(this) ;
- // create a folder on the white board //YSAlice/WhiteBoard/RecParticles/PHOS/recparticlesName
- gime->PostRecParticles(taskName.Data() ) ;
-
-}
-
-//____________________________________________________________________________
-void AliPHOSPIDv2::MakeRecParticles(){
-
- // Makes a RecParticle out of a TrackSegment
-
- TString taskName(GetName()) ;
- taskName.Remove(taskName.Index(Version())-1) ;
-
- AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
- TObjArray * emcRecPoints = gime->EmcRecPoints(fFrom) ;
- TObjArray * cpvRecPoints = gime->CpvRecPoints(fFrom) ;
- TClonesArray * trackSegments = gime->TrackSegments(fFrom) ;
- if ( !emcRecPoints || !cpvRecPoints || !trackSegments ) {
- cerr << "ERROR: AliPHOSPIDv2::MakeRecParticles -> RecPoints or TrackSegments with name "
- << fFrom << " not found ! " << endl ;
- abort() ;
- }
- TClonesArray * recParticles = gime->RecParticles(taskName) ;
- recParticles->Clear();
-
-
- TIter next(trackSegments) ;
- AliPHOSTrackSegment * ts ;
- Int_t index = 0 ;
- AliPHOSRecParticle * rp ;
-
- while ( (ts = (AliPHOSTrackSegment *)next()) ) {
-
- new( (*recParticles)[index] ) AliPHOSRecParticle() ;
- rp = (AliPHOSRecParticle *)recParticles->At(index) ;
- rp->SetTraskSegment(index) ;
- rp->SetIndexInList(index) ;
-
- AliPHOSEmcRecPoint * emc = 0 ;
- if(ts->GetEmcIndex()>=0)
- emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(ts->GetEmcIndex()) ;
-
- AliPHOSRecPoint * cpv = 0 ;
- if(ts->GetCpvIndex()>=0)
- cpv = (AliPHOSRecPoint *) cpvRecPoints->At(ts->GetCpvIndex()) ;
-
- //set momentum and energy first
- Float_t e = emc->GetEnergy() ;
- TVector3 dir = GetMomentumDirection(emc,cpv) ;
- dir.SetMag(e) ;
-
- rp->SetMomentum(dir.X(),dir.Y(),dir.Z(),e) ;
- rp->SetCalcMass(0);
-
- //now set type (reconstructed) of the particle
-
- // Looking at the CPV detector. If RCPV grater than fCpvEmcDistance, first bit 1.
- if(cpv)
- if(GetDistance(emc, cpv, "R") > fCpvEmcDistance )
- rp->SetPIDBit(0);
-
- //Looking the TOF. If TOF smaller than gate, second bit 1.
- if(emc->GetTime()< fTimeGate)
- rp->SetPIDBit(1);
-
-
- //Loking PCA. Define and calculate the data (X) introduce in the function
- //X2P that gives the components (P).
- Float_t fSpher = 0. ;
- Float_t fEmaxdtotal = 0. ;
- Float_t lambda[2] ;
-
- emc->GetElipsAxis(lambda) ;
- if((lambda[0]+lambda[1])!=0) fSpher=fabs(lambda[0]-lambda[1])/(lambda[0]+lambda[1]);
-
- fEmaxdtotal=emc->GetMaximalEnergy()/emc->GetEnergy();
-
- fX[0] = lambda[0]; //cout <<" lambda0 "<<fX[0];
- fX[1] = lambda[1]; //cout <<" lambda1 "<<fX[1];
- fX[2] = emc->GetDispersion(); // cout <<" disper "<<fX[2];
- fX[3] = fSpher; // cout <<" spher "<<fX[3];
- fX[4] = emc->GetMultiplicity(); // cout <<" mult "<<fX[4];
- fX[5] = fEmaxdtotal; // cout <<" emax "<<fX[5];
- fX[6] = emc->GetCoreEnergy(); // cout <<" core "<<fX[5]<< endl ;
-
- // cout<<"Principal "<<fPrincipal<<endl;
- fPrincipal->X2P(fX,fP);
-
- //If we are inside the ellipse, third bit 1
- if(GetPrincipalSign(fP)== 1)
- rp->SetPIDBit(2) ;
-
-
- rp->SetProductionVertex(0,0,0,0);
- rp->SetFirstMother(-1);
- rp->SetLastMother(-1);
- rp->SetFirstDaughter(-1);
- rp->SetLastDaughter(-1);
- rp->SetPolarisation(0,0,0);
- index++ ;
- }
-
-}
-
-//____________________________________________________________________________
-void AliPHOSPIDv2:: Print(Option_t * option) const
-{
- // Print the parameters used for the particle type identification
- cout << "=============== AliPHOSPID1 ================" << endl ;
- cout << "Making PID "<< endl ;
- cout << " Headers file: " << fHeaderFileName.Data() << endl ;
- cout << " RecPoints branch title: " << fRecPointsTitle.Data() << endl ;
- cout << " TrackSegments Branch title: " << fTrackSegmentsTitle.Data() << endl ;
- cout << " RecParticles Branch title " << fRecParticlesTitle.Data() << endl;
- cout << "with parameters: " << endl ;
- cout << " Maximal EMC - CPV distance (cm) " << fCpvEmcDistance << endl ;
- cout << " Time Gate used: " << fTimeGate << endl ;
- cout << " Principal Ellipse Parameters " << endl ;
- cout << " Ellipse center (x,y) (" << fX_center<<","<<fY_center<<")"<< endl;
- cout << " Ellipse focus (a,b) (" << fA<<","<<fB<<")"<< endl;
- cout << " Ellipse angle " << fAngle<< endl;
- cout << "============================================" << endl ;
-}
-
-//____________________________________________________________________________
-void AliPHOSPIDv2::WriteRecParticles(Int_t event)
-{
-
- AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
- TString taskName(GetName()) ;
- taskName.Remove(taskName.Index(Version())-1) ;
- TClonesArray * recParticles = gime->RecParticles(taskName) ;
- recParticles->Expand(recParticles->GetEntriesFast() ) ;
-
- //Make branch in TreeR for RecParticles
- char * filename = 0;
- if(gSystem->Getenv("CONFIG_SPLIT_FILE")!=0){ //generating file name
- filename = new char[strlen(gAlice->GetBaseFile())+20] ;
- sprintf(filename,"%s/PHOS.Reco.root",gAlice->GetBaseFile()) ;
- }
-
- TDirectory *cwd = gDirectory;
-
- //First rp
- Int_t bufferSize = 32000 ;
- TBranch * rpBranch = gAlice->TreeR()->Branch("PHOSRP",&recParticles,bufferSize);
- rpBranch->SetTitle(fRecParticlesTitle);
- if (filename) {
- rpBranch->SetFile(filename);
- TIter next( rpBranch->GetListOfBranches());
- TBranch * sb ;
- while ((sb=(TBranch*)next())) {
- sb->SetFile(filename);
- }
- cwd->cd();
- }
-
- //second, pid
- Int_t splitlevel = 0 ;
- AliPHOSPIDv2 * pid = this ;
- TBranch * pidBranch = gAlice->TreeR()->Branch("AliPHOSPID","AliPHOSPIDv2",&pid,bufferSize,splitlevel);
- pidBranch->SetTitle(fRecParticlesTitle.Data());
- if (filename) {
- pidBranch->SetFile(filename);
- TIter next( pidBranch->GetListOfBranches());
- TBranch * sb ;
- while ((sb=(TBranch*)next())) {
- sb->SetFile(filename);
- }
- cwd->cd();
- }
-
- rpBranch->Fill() ;
- pidBranch->Fill() ;
-
- gAlice->TreeR()->Write(0,kOverwrite) ;
- //pidBranch->Write(0,kOverwrite) ;
-
- delete [] filename ;
-}
-
-//____________________________________________________________________________
-TVector3 AliPHOSPIDv2::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSRecPoint * cpv)const
-{
- // Calculates the momentum direction:
- // 1. if only a EMC RecPoint, direction is given by IP and this RecPoint
- // 2. if a EMC RecPoint and CPV RecPoint, direction is given by the line through the 2 recpoints
- // However because of the poor position resolution of PPSD the direction is always taken as if we were
- // in case 1.
-
- TVector3 dir(0,0,0) ;
-
- TVector3 emcglobalpos ;
- TMatrix dummy ;
-
- emc->GetGlobalPosition(emcglobalpos, dummy) ;
-
-
- dir = emcglobalpos ;
- dir.SetZ( -dir.Z() ) ; // why ?
- dir.SetMag(1.) ;
-
- //account correction to the position of IP
- Float_t xo,yo,zo ; //Coordinates of the origin
- gAlice->Generator()->GetOrigin(xo,yo,zo) ;
- TVector3 origin(xo,yo,zo);
- dir = dir - origin ;
-
- return dir ;
-}
-//____________________________________________________________________________
-void AliPHOSPIDv2::PrintRecParticles(Option_t * option)
-{
- // Print table of reconstructed particles
-
- AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
-
- TString taskName(GetName()) ;
- taskName.Remove(taskName.Index(Version())-1) ;
- TClonesArray * recParticles = gime->RecParticles(taskName) ;
-
- cout << "AliPHOSPIDv2: event "<<gAlice->GetEvNumber() << endl ;
- cout << " found " << recParticles->GetEntriesFast() << " RecParticles " << endl ;
-
- if(strstr(option,"all")) { // printing found TS
-
- cout << " PARTICLE "
- << " Index " << endl ;
-
- Int_t index ;
- for (index = 0 ; index < recParticles->GetEntries() ; index++) {
- AliPHOSRecParticle * rp = (AliPHOSRecParticle * ) recParticles->At(index) ;
-
- Text_t particle[11];
- switch(rp->GetType()) {
- case AliPHOSFastRecParticle::kCHARGEDHASLOW:
- strcpy(particle, "CHARGED HA SLOW") ;
- break ;
- case AliPHOSFastRecParticle::kNEUTRALHASLOW:
- strcpy(particle, "NEUTRAL HA SLOW");
- break ;
- case AliPHOSFastRecParticle::kCHARGEDHAFAST:
- strcpy(particle, "CHARGED HA FAST") ;
- break ;
- case AliPHOSFastRecParticle::kNEUTRALHAFAST:
- strcpy(particle, "NEUTRAL HA FAST");
- break;
- case AliPHOSFastRecParticle::kCHARGEDEMSLOW:
- strcpy(particle, "CHARGED EM SLOW") ;
- break ;
- case AliPHOSFastRecParticle::kNEUTRALEMSLOW:
- strcpy(particle, "NEUTRAL EM SLOW");
- break ;
- case AliPHOSFastRecParticle::kCHARGEDEMFAST:
- strcpy(particle, "CHARGED EM FAST") ;
- break ;
- case AliPHOSFastRecParticle::kNEUTRALEMFAST:
- strcpy( particle, "NEUTRAL EM FAST");
- break;
- }
-
- cout << setw(10) << particle << " "
- << setw(5) << rp->GetIndexInList() << " " <<endl;
-
- }
- cout << "-------------------------------------------" << endl ;
- }
-
-}
-
-
-
git://git.uio.no / u / mrichter / AliRoot.git / commitdiff