1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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8 * documentation strictly for non-commercial purposes is hereby granted *
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11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 // Realisation of AliGenReader to be used with AliGenExtFile
19 // It reads Hijing events from a ntuple like event structure.
20 // The event format is defined in Init()
21 // NextEvent() is used to loop over events and NextParticle() to loop over particles.
22 // Author: andreas.morsch@cern.ch
25 #include <TParticle.h>
26 #include <TDatabasePDG.h>
29 #include "AliGenReaderEcalHijing.h"
31 ClassImp(AliGenReaderEcalHijing)
33 AliGenReaderEcalHijing::AliGenReaderEcalHijing():
41 // Default constructor
44 AliGenReaderEcalHijing::AliGenReaderEcalHijing(const AliGenReaderEcalHijing &reader):
57 void AliGenReaderEcalHijing::Init()
60 // reset the existing file environment and open a new root file if
61 // the pointer to the Fluka tree is null
65 pFile = new TFile(fFileName);
67 printf("\n I have opened %s file \n", fFileName);
69 // get the tree address in the Fluka boundary source file
70 fTreeNtuple = (TTree*)gDirectory->Get("h2");
71 TTree *h2=fTreeNtuple;
73 //Set branch addresses
74 h2->SetBranchAddress("njatt", &fNjatt);
75 h2->SetBranchAddress("nahij", &fNahij);
76 h2->SetBranchAddress("nphij", &fNphij);
77 h2->SetBranchAddress("khij", fKhij) ;
78 h2->SetBranchAddress("pxhij", fPxhij);
79 h2->SetBranchAddress("pyhij", fPyhij);
80 h2->SetBranchAddress("pzhij", fPzhij);
81 h2->SetBranchAddress("ehij", fEhij) ;
84 Int_t AliGenReaderEcalHijing::NextEvent()
86 // Read the next event
87 Int_t nTracks=0, nread=0;
89 TFile* pFile = fTreeNtuple->GetCurrentFile();
92 Int_t nentries = (Int_t) fTreeNtuple->GetEntries();
93 if (fNcurrent < nentries) {
94 Int_t nb = (Int_t)fTreeNtuple->GetEvent(fNcurrent);
97 printf("\n Next event contains %d tracks! \n", fNphij);
105 TParticle* AliGenReaderEcalHijing::NextParticle()
107 // Read the next particle
110 Int_t ipart = fKhij[fNparticle];
111 p[0] = fPxhij[fNparticle];
112 p[1] = fPyhij[fNparticle];
113 p[2] = fPzhij[fNparticle];
114 p[3] = fEhij[fNparticle];
116 Double_t amass = TDatabasePDG::Instance()->GetParticle(ipart)->Mass();
119 Warning("Generate","Particle %d E = %f mass = %f \n",
122 TParticle* particle =
123 new TParticle(ipart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3],
131 AliGenReaderEcalHijing& AliGenReaderEcalHijing::operator=(const AliGenReaderEcalHijing& rhs)
133 // Assignment operator
138 void AliGenReaderEcalHijing::Copy(TObject&) const
143 Fatal("Copy","Not implemented!\n");