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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10 * copies and that both the copyright notice and this permission notice *
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)
33 AliGenReaderEcalHijing::AliGenReaderEcalHijing()
35 // Default constructor
40 void AliGenReaderEcalHijing::Init()
43 // reset the existing file environment and open a new root file if
44 // the pointer to the Fluka tree is null
48 pFile = new TFile(fFileName);
50 printf("\n I have opened %s file \n", fFileName);
52 // get the tree address in the Fluka boundary source file
53 fTreeNtuple = (TTree*)gDirectory->Get("h2");
54 TTree *h2=fTreeNtuple;
56 //Set branch addresses
57 h2->SetBranchAddress("njatt", &fNjatt);
58 h2->SetBranchAddress("nahij", &fNahij);
59 h2->SetBranchAddress("nphij", &fNphij);
60 h2->SetBranchAddress("khij", fKhij) ;
61 h2->SetBranchAddress("pxhij", fPxhij);
62 h2->SetBranchAddress("pyhij", fPyhij);
63 h2->SetBranchAddress("pzhij", fPzhij);
64 h2->SetBranchAddress("ehij", fEhij) ;
67 Int_t AliGenReaderEcalHijing::NextEvent()
69 // Read the next event
70 Int_t nTracks=0, nread=0;
72 TFile* pFile = fTreeNtuple->GetCurrentFile();
75 Int_t nentries = (Int_t) fTreeNtuple->GetEntries();
76 if (fNcurrent < nentries) {
77 Int_t nb = (Int_t)fTreeNtuple->GetEvent(fNcurrent);
80 printf("\n Next event contains %d tracks! \n", fNphij);
88 TParticle* AliGenReaderEcalHijing::NextParticle()
90 // Read the next particle
93 Int_t ipart = fKhij[fNparticle];
94 p[0] = fPxhij[fNparticle];
95 p[1] = fPyhij[fNparticle];
96 p[2] = fPzhij[fNparticle];
97 p[3] = fEhij[fNparticle];
99 Double_t amass = TDatabasePDG::Instance()->GetParticle(ipart)->Mass();
102 Warning("Generate","Particle %d E = %f mass = %f \n",
105 TParticle* particle =
106 new TParticle(ipart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3],
114 AliGenReaderEcalHijing& AliGenReaderEcalHijing::operator=(const AliGenReaderEcalHijing& rhs)
116 // Assignment operator
121 void AliGenReaderEcalHijing::Copy(TObject&) const
126 Fatal("Copy","Not implemented!\n");