AliEmcalParticle.h

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#ifndef ALIEMCALPARTICLE_H
#define ALIEMCALPARTICLE_H

#include <TLorentzVector.h>
#include <TMath.h>
#include <TObjArray.h>
#include "AliVCluster.h"
#include "AliVParticle.h"
#include "AliVTrack.h"

class AliEmcalParticle: public AliVParticle {
 public:  
  AliEmcalParticle();
  AliEmcalParticle(AliVTrack* track, Int_t id = -1);
  AliEmcalParticle(AliVCluster* cluster, Int_t id = -1, Double_t vx=0, Double_t vy=0, Double_t vz=0, Int_t ude=-1);
  AliEmcalParticle(const AliEmcalParticle &p); 
  AliEmcalParticle &operator=(const AliEmcalParticle &p);
  virtual ~AliEmcalParticle();

  // AliVParticle interface
  Double_t          Px()        const { return fPt*TMath::Cos(fPhi);  }
  Double_t          Py()        const { return fPt*TMath::Sin(fPhi);  };
  Double_t          Pz()        const { return fPt*TMath::SinH(fEta); }
  Double_t          Pt()        const { return fPt ; }
  Double_t          P()         const { return TMath::Sqrt(Px()*Px()+Py()*Py()+Pz()*Pz()); }
  Bool_t            PxPyPz(Double_t p[3]) const { p[0] = Px(); p[1] = Py(); p[2] = Pz(); return 1; }
  Double_t          Xv()        const { return 0; }
  Double_t          Yv()        const { return 0; }
  Double_t          Zv()        const { return 0; }
  Bool_t            XvYvZv(Double_t x[3]) const { x[0] = Xv(); x[1] = Yv(); x[2] = Zv(); return 1; }
  Double_t          OneOverPt() const { return 1./fPt; }
  Double_t          Phi()       const { return fPhi; }
  Double_t          Theta()     const { return 2*TMath::ATan(TMath::Exp(-fEta));  }
  Double_t          E()         const { Double_t p=P(); return TMath::Sqrt(M()*M()+p*p); }
  Double_t          M()         const { return fM; }
  Double_t          Eta()       const { return fEta; }
  Double_t          Y()         const { if (fTrack) return fTrack->Y(); return fEta; }
  Short_t           Charge()    const { if (fTrack) return fTrack->Charge(); else return 0; }
  Int_t             GetLabel()  const { if (fTrack) return fTrack->GetLabel(); return fCluster->GetLabel(); }
  Int_t             PdgCode()   const { return 0; }
  const Double_t   *PID()       const { return 0; }

  void              AddMatchedObj(Int_t id, Double_t d);
  AliVCluster      *GetCluster()           const { return fCluster                                                  ; }
  Int_t             GetMatchedObjId(UShort_t i = 0)         const { return fNMatched > i ? fMatchedIds[i]  : -1     ; }
  Double_t          GetMatchedObjDistance(UShort_t i = 0)   const { return fNMatched > i ? fMatchedDist[i] : -1     ; }
  UShort_t          GetNumberOfMatchedObj()                 const { return fNMatched                                ; }
  AliVCluster      *GetMatchedCluster(UShort_t i = 0)       const { if (fTrack && fMatchedPtr && (fNMatched > i)) 
                                                                      return static_cast<AliVCluster*>(fMatchedPtr->At(fMatchedIds[i]));
                                                                    return 0                                        ; } 
  AliVTrack        *GetMatchedTrack(UShort_t i = 0)         const { if (fCluster && fMatchedPtr && (fNMatched > i)) 
                                                                      return static_cast<AliVTrack*>(fMatchedPtr->At(fMatchedIds[i]));
                                                                    return 0                                        ; } 
  AliVTrack        *GetTrack()             const { return fTrack                                                    ; }
  Double_t          GetTrackPhiOnEMCal()   const { if (fTrack) return fTrack->GetTrackPhiOnEMCal(); else return -999; }
  Double_t          GetTrackEtaOnEMCal()   const { if (fTrack) return fTrack->GetTrackEtaOnEMCal(); else return -999; }
  Double_t          GetTrackPtOnEMCal()    const { if (fTrack) return fTrack->GetTrackPtOnEMCal();  else return -999; }
  Int_t             IdInCollection()       const { return fId                                                       ; }
  Bool_t            IsCluster()            const { return (Bool_t) fCluster != 0                                    ; }
  Bool_t            IsEMCAL()              const { if (fCluster) return fCluster->IsEMCAL(); 
                                                   if (fTrack)   return fTrack->IsEMCAL(); 
                                                   return kFALSE; }
  Bool_t            IsTrack()              const { return (Bool_t) fTrack   != 0                                    ; }
  Bool_t            IsMC(Int_t minLabel=0) const { if (fTrack) return (TMath::Abs(fTrack->GetLabel()) > minLabel); 
                                                   return (fCluster->GetLabel() > minLabel); }
  void              ResetMatchedObjects();
  void              SetIdInCollection(Int_t id)          { fId = id                                                                      ; }
  void              SetMatchedObj(Int_t id, Double_t d)  { ResetMatchedObjects(); fMatchedIds[0] = id; fMatchedDist[0] = d; fNMatched = 1; }
  void              SetMatchedPtr(TObjArray *arr)        { fMatchedPtr = arr; }

  void              SetPtEtaPhiM(Double_t pt, Double_t eta, Double_t phi, Double_t m) {fPt=pt; fEta=eta; fPhi=phi; fM=m;}
  
 protected:
  TLorentzVector   &GetLorentzVector(const Double_t *vertex = 0)  const;

  static const UShort_t fSizeMatched = 99;        

  AliVTrack        *fTrack;                       
  AliVCluster      *fCluster;                     
  UShort_t          fMatchedIds[fSizeMatched];    
  Double_t          fMatchedDist[fSizeMatched];   
  UShort_t          fNMatched;                    
  Int_t             fId;                          
  Double_t          fPhi;                         
  Double_t          fEta;                         
  Double_t          fPt;                          
  Double_t          fM;                           
  TObjArray        *fMatchedPtr;                  

  ClassDef(AliEmcalParticle, 3) // Emcal particle class
};
#endif