--- /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","ts1")
+// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
+// // reading headers from file galice1.root and TrackSegments
+// // with title "ts1"
+// root [4] p2->SetRecParticlesBranch("rp1")
+// // set file name for the branch RecParticles
+// root [5] p2->ExecuteTask("deb all time")
+// // available options
+// // "deb" - prints # of reconstructed particles
+// // "deb all" - prints # and list of RecParticles
+// // "time" - prints benchmarking results
+//
+//*-- 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 ;
+
+}
+
+//____________________________________________________________________________
+AliPHOSPIDv2::AliPHOSPIDv2(const char * headerFile,const char * name) : 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 ;
+
+ 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 ;
+ }
+
+ 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,"R") ;
+
+ MakeRecParticles() ;
+
+ WriteRecParticles(ievent);
+
+ if(strstr(option,"deb"))
+ PrintRecParticles(option) ;
+
+ //increment the total number of rec particles per run
+ fRecParticlesInRun += gime->RecParticles()->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")) ;
+
+ // Ellipse parameters
+ fX_center = 2.0 ;
+ fY_center = -0.35 ;
+
+ fA = 1.9 ;
+ fB = 1.0 ;
+ fAngle = -60. ;
+
+ AliPHOSGetter * gime = AliPHOSGetter::GetInstance(GetTitle(), taskName.Data()) ;
+ 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(taskName) ;
+ TObjArray * cpvRecPoints = gime->CpvRecPoints(taskName) ;
+ TClonesArray * trackSegments = gime->TrackSegments(taskName) ;
+ 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