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>
28 #include "AliGenReaderEcalHijing.h"
30 ClassImp(AliGenReaderEcalHijing)
32 AliGenReaderEcalHijing::AliGenReaderEcalHijing():
40 // Default constructor
43 AliGenReaderEcalHijing::AliGenReaderEcalHijing(const AliGenReaderEcalHijing &reader):
56 void AliGenReaderEcalHijing::Init()
59 // reset the existing file environment and open a new root file if
60 // the pointer to the Fluka tree is null
64 pFile = new TFile(fFileName);
66 printf("\n I have opened %s file \n", fFileName);
68 // get the tree address in the Fluka boundary source file
69 fTreeNtuple = (TTree*)gDirectory->Get("h2");
70 TTree *h2=fTreeNtuple;
72 //Set branch addresses
73 h2->SetBranchAddress("njatt", &fNjatt);
74 h2->SetBranchAddress("nahij", &fNahij);
75 h2->SetBranchAddress("nphij", &fNphij);
76 h2->SetBranchAddress("khij", fKhij) ;
77 h2->SetBranchAddress("pxhij", fPxhij);
78 h2->SetBranchAddress("pyhij", fPyhij);
79 h2->SetBranchAddress("pzhij", fPzhij);
80 h2->SetBranchAddress("ehij", fEhij) ;
83 Int_t AliGenReaderEcalHijing::NextEvent()
85 // Read the next event
86 Int_t nTracks=0, nread=0;
88 TFile* pFile = fTreeNtuple->GetCurrentFile();
91 Int_t nentries = (Int_t) fTreeNtuple->GetEntries();
92 if (fNcurrent < nentries) {
93 Int_t nb = (Int_t)fTreeNtuple->GetEvent(fNcurrent);
96 printf("\n Next event contains %d tracks! \n", fNphij);
104 TParticle* AliGenReaderEcalHijing::NextParticle()
106 // Read the next particle
109 Int_t ipart = fKhij[fNparticle];
110 p[0] = fPxhij[fNparticle];
111 p[1] = fPyhij[fNparticle];
112 p[2] = fPzhij[fNparticle];
113 p[3] = fEhij[fNparticle];
115 Double_t amass = TDatabasePDG::Instance()->GetParticle(ipart)->Mass();
118 Warning("Generate","Particle %d E = %f mass = %f \n",
121 TParticle* particle =
122 new TParticle(ipart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3],
130 AliGenReaderEcalHijing& AliGenReaderEcalHijing::operator=(const AliGenReaderEcalHijing& rhs)
132 // Assignment operator
137 void AliGenReaderEcalHijing::Copy(TObject&) const
142 Fatal("Copy","Not implemented!\n");