Readers for EMCAL primary particle input.
[u/mrichter/AliRoot.git] / EVGEN / AliGenReaderEcalHijing.cxx
CommitLineData
b152a071 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
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 **************************************************************************/
15
16/*
17$Log$
18*/
19
20#include <TFile.h>
21#include <TTree.h>
22#include <TParticle.h>
23
24#include "AliGenReaderEcalHijing.h"
25#include "AliMC.h"
26ClassImp(AliGenReaderEcalHijing)
27
28
29AliGenReaderEcalHijing::AliGenReaderEcalHijing()
30{
31// Default constructor
32 fNcurrent = 0;
33 fTreeNtuple = 0;
34}
35
36void AliGenReaderEcalHijing::Init()
37{
38//
39// reset the existing file environment and open a new root file if
40// the pointer to the Fluka tree is null
41
42 TFile *pFile=0;
43 if (!pFile) {
44 pFile = new TFile(fFileName);
45 pFile->cd();
46 printf("\n I have opened %s file \n", fFileName);
47 }
48// get the tree address in the Fluka boundary source file
49 fTreeNtuple = (TTree*)gDirectory->Get("h2");
50 TTree *h2=fTreeNtuple;
51 h2->SetMakeClass(1);
52//Set branch addresses
53 h2->SetBranchAddress("njatt", &fNjatt);
54 h2->SetBranchAddress("nahij", &fNahij);
55 h2->SetBranchAddress("nphij", &fNphij);
56 h2->SetBranchAddress("khij", fKhij) ;
57 h2->SetBranchAddress("pxhij", fPxhij);
58 h2->SetBranchAddress("pyhij", fPyhij);
59 h2->SetBranchAddress("pzhij", fPzhij);
60 h2->SetBranchAddress("ehij", fEhij) ;
61}
62
63Int_t AliGenReaderEcalHijing::NextEvent()
64{
65// Read the next event
66 Int_t nTracks, nread;
67
68 TFile* pFile = fTreeNtuple->GetCurrentFile();
69 pFile->cd();
70
71 Int_t nentries = (Int_t) fTreeNtuple->GetEntries();
72 if (fNcurrent < nentries) {
73 Int_t nb = (Int_t)fTreeNtuple->GetEvent(fNcurrent);
74 nread += nb;
75 fNcurrent++;
76 printf("\n Next event contains %d tracks! \n", fNphij);
77 nTracks = fNphij;
78 fNparticle = 0;
79 return nTracks;
80 }
81 return 0;
82}
83
84TParticle* AliGenReaderEcalHijing::NextParticle()
85{
86 Float_t p[4];
87// Read the next particle
88 Int_t ipart = fKhij[fNparticle];
89 p[0] = fPxhij[fNparticle];
90 p[1] = fPyhij[fNparticle];
91 p[2] = fPzhij[fNparticle];
92 p[3] = fEhij[fNparticle];
93
94 Double_t amass = TDatabasePDG::Instance()->GetParticle(ipart)->Mass();
95
96 if(p[3] <= amass) {
97 Warning("Generate","Particle %d E = %f mass = %f \n",
98 ipart, p[3], amass);
99 }
100 TParticle* particle =
101 new TParticle(ipart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3],
102 0., 0., 0., 0.);
103 fNparticle++;
104 return particle;
105}
106
107
108
109AliGenReaderEcalHijing& AliGenReaderEcalHijing::operator=(const AliGenReaderEcalHijing& rhs)
110{
111// Assignment operator
112 return *this;
113}
114
115
116
117
118
119