effc++ corrections (alberto)
[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
88cb7938 16/* $Id$ */
93de1f83 17//
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
23//
b152a071 24#include <TFile.h>
b152a071 25#include <TParticle.h>
88cb7938 26#include <TTree.h>
b152a071 27
28#include "AliGenReaderEcalHijing.h"
88cb7938 29
b152a071 30ClassImp(AliGenReaderEcalHijing)
31
32
33AliGenReaderEcalHijing::AliGenReaderEcalHijing()
34{
35// Default constructor
36 fNcurrent = 0;
37 fTreeNtuple = 0;
38}
39
40void AliGenReaderEcalHijing::Init()
41{
42//
43// reset the existing file environment and open a new root file if
44// the pointer to the Fluka tree is null
45
46 TFile *pFile=0;
47 if (!pFile) {
48 pFile = new TFile(fFileName);
49 pFile->cd();
50 printf("\n I have opened %s file \n", fFileName);
51 }
52// get the tree address in the Fluka boundary source file
53 fTreeNtuple = (TTree*)gDirectory->Get("h2");
54 TTree *h2=fTreeNtuple;
55 h2->SetMakeClass(1);
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) ;
65}
66
67Int_t AliGenReaderEcalHijing::NextEvent()
68{
69// Read the next event
58323221 70 Int_t nTracks=0, nread=0;
b152a071 71
72 TFile* pFile = fTreeNtuple->GetCurrentFile();
73 pFile->cd();
74
75 Int_t nentries = (Int_t) fTreeNtuple->GetEntries();
76 if (fNcurrent < nentries) {
77 Int_t nb = (Int_t)fTreeNtuple->GetEvent(fNcurrent);
78 nread += nb;
79 fNcurrent++;
80 printf("\n Next event contains %d tracks! \n", fNphij);
81 nTracks = fNphij;
82 fNparticle = 0;
83 return nTracks;
84 }
85 return 0;
86}
87
88TParticle* AliGenReaderEcalHijing::NextParticle()
89{
b152a071 90// Read the next particle
93de1f83 91
92 Float_t p[4];
b152a071 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];
98
99 Double_t amass = TDatabasePDG::Instance()->GetParticle(ipart)->Mass();
100
101 if(p[3] <= amass) {
102 Warning("Generate","Particle %d E = %f mass = %f \n",
103 ipart, p[3], amass);
104 }
105 TParticle* particle =
106 new TParticle(ipart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3],
107 0., 0., 0., 0.);
108 fNparticle++;
109 return particle;
110}
111
112
113
114AliGenReaderEcalHijing& AliGenReaderEcalHijing::operator=(const AliGenReaderEcalHijing& rhs)
115{
116// Assignment operator
198bb1c7 117 rhs.Copy(*this);
118 return (*this);
119}
120
dc1d768c 121void AliGenReaderEcalHijing::Copy(TObject&) const
198bb1c7 122{
123 //
124 // Copy
125 //
126 Fatal("Copy","Not implemented!\n");
b152a071 127}
128
129
130
131
132
133