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. *
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 **************************************************************************/
18 // Realisation of AliGenReader to be used with AliGenExtFile
19 // It reads Pythia Jet 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 "AliGenReaderEcalJets.h"
31 ClassImp(AliGenReaderEcalJets)
34 AliGenReaderEcalJets::AliGenReaderEcalJets():
44 // Default constructor
45 for (Int_t i = 0; i < 200; i++) {
68 AliGenReaderEcalJets::AliGenReaderEcalJets(const AliGenReaderEcalJets &reader)
69 :AliGenReader(reader),
79 for (Int_t i = 0; i < 200; i++) {
105 void AliGenReaderEcalJets::Init()
108 // reset the existing file environment and open a new root file if
109 // the pointer to the Fluka tree is null
113 pFile = new TFile(fFileName);
115 printf("\n I have opened %s file \n", fFileName);
117 // get the tree address in the Fluka boundary source file
118 fTreeNtuple = (TTree*)gDirectory->Get("h1");
119 TTree *h1=fTreeNtuple;
121 //Set branch addresses
122 h1->SetBranchAddress("nev", &fNev);
123 h1->SetBranchAddress("x", fX);
124 h1->SetBranchAddress("xtyp", fXtyp);
125 h1->SetBranchAddress("npart", &fNpart);
126 h1->SetBranchAddress("xpt", fXpt);
127 h1->SetBranchAddress("xeta", fXeta);
128 h1->SetBranchAddress("xphi", fXphi);
129 h1->SetBranchAddress("xid", fXid);
130 h1->SetBranchAddress("njet", &fNjet);
131 h1->SetBranchAddress("jet", fJet);
132 h1->SetBranchAddress("jeta", fJeta);
133 h1->SetBranchAddress("jphi", fJphi);
134 h1->SetBranchAddress("nsjet", &fNsjet);
135 h1->SetBranchAddress("jset", fJset);
136 h1->SetBranchAddress("jseta", fJseta);
137 h1->SetBranchAddress("jsphi", fJsphi);
138 h1->SetBranchAddress("npjet", &fNpjet);
139 h1->SetBranchAddress("jpet", fJpet);
140 h1->SetBranchAddress("jpeta", fJpeta);
141 h1->SetBranchAddress("jpphi", fJpphi);
144 Int_t AliGenReaderEcalJets::NextEvent()
146 // Read the next event
147 Int_t nTracks=0, nread=0;
149 TFile* pFile = fTreeNtuple->GetCurrentFile();
152 Int_t nentries = (Int_t) fTreeNtuple->GetEntries();
153 if (fNcurrent < nentries) {
154 Int_t nb = (Int_t)fTreeNtuple->GetEvent(fNcurrent);
157 printf("\n Next event contains %d tracks! \n", fNpjet);
165 TParticle* AliGenReaderEcalJets::NextParticle()
167 // Read the next particle
170 Int_t ipart = fXid[fNparticle];
171 Float_t pt = fXpt[fNparticle];
172 Float_t eta = fXeta[fNparticle];
173 Float_t phi = fXphi[fNparticle];
174 Float_t theta = 2.*TMath::ATan(TMath::Exp(-eta));
175 Double_t amass = TDatabasePDG::Instance()->GetParticle(ipart)->Mass();
177 p[0] = pt*TMath::Sin(phi);
178 p[1] = pt*TMath::Cos(phi);
179 p[2] = pt/TMath::Cos(theta);
180 p[3] = TMath::Sqrt(pt*pt+p[2]*p[2]+amass*amass);
183 TParticle* particle =
184 new TParticle(ipart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3],
192 AliGenReaderEcalJets& AliGenReaderEcalJets::operator=(const AliGenReaderEcalJets& rhs)
194 // Assignment operator
199 void AliGenReaderEcalJets::Copy(TObject&) const
204 Fatal("Copy","Not implemented!\n");