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
47 AliGenReaderEcalJets::AliGenReaderEcalJets(const AliGenReaderEcalJets &reader)
48 :AliGenReader(reader),
62 void AliGenReaderEcalJets::Init()
65 // reset the existing file environment and open a new root file if
66 // the pointer to the Fluka tree is null
70 pFile = new TFile(fFileName);
72 printf("\n I have opened %s file \n", fFileName);
74 // get the tree address in the Fluka boundary source file
75 fTreeNtuple = (TTree*)gDirectory->Get("h1");
76 TTree *h1=fTreeNtuple;
78 //Set branch addresses
79 h1->SetBranchAddress("nev", &fNev);
80 h1->SetBranchAddress("x", fX);
81 h1->SetBranchAddress("xtyp", fXtyp);
82 h1->SetBranchAddress("npart", &fNpart);
83 h1->SetBranchAddress("xpt", fXpt);
84 h1->SetBranchAddress("xeta", fXeta);
85 h1->SetBranchAddress("xphi", fXphi);
86 h1->SetBranchAddress("xid", fXid);
87 h1->SetBranchAddress("njet", &fNjet);
88 h1->SetBranchAddress("jet", fJet);
89 h1->SetBranchAddress("jeta", fJeta);
90 h1->SetBranchAddress("jphi", fJphi);
91 h1->SetBranchAddress("nsjet", &fNsjet);
92 h1->SetBranchAddress("jset", fJset);
93 h1->SetBranchAddress("jseta", fJseta);
94 h1->SetBranchAddress("jsphi", fJsphi);
95 h1->SetBranchAddress("npjet", &fNpjet);
96 h1->SetBranchAddress("jpet", fJpet);
97 h1->SetBranchAddress("jpeta", fJpeta);
98 h1->SetBranchAddress("jpphi", fJpphi);
101 Int_t AliGenReaderEcalJets::NextEvent()
103 // Read the next event
104 Int_t nTracks=0, nread=0;
106 TFile* pFile = fTreeNtuple->GetCurrentFile();
109 Int_t nentries = (Int_t) fTreeNtuple->GetEntries();
110 if (fNcurrent < nentries) {
111 Int_t nb = (Int_t)fTreeNtuple->GetEvent(fNcurrent);
114 printf("\n Next event contains %d tracks! \n", fNpjet);
122 TParticle* AliGenReaderEcalJets::NextParticle()
124 // Read the next particle
127 Int_t ipart = fXid[fNparticle];
128 Float_t pt = fXpt[fNparticle];
129 Float_t eta = fXeta[fNparticle];
130 Float_t phi = fXphi[fNparticle];
131 Float_t theta = 2.*TMath::ATan(TMath::Exp(-eta));
132 Double_t amass = TDatabasePDG::Instance()->GetParticle(ipart)->Mass();
134 p[0] = pt*TMath::Sin(phi);
135 p[1] = pt*TMath::Cos(phi);
136 p[2] = pt/TMath::Cos(theta);
137 p[3] = TMath::Sqrt(pt*pt+p[2]*p[2]+amass*amass);
140 TParticle* particle =
141 new TParticle(ipart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3],
149 AliGenReaderEcalJets& AliGenReaderEcalJets::operator=(const AliGenReaderEcalJets& rhs)
151 // Assignment operator
156 void AliGenReaderEcalJets::Copy(TObject&) const
161 Fatal("Copy","Not implemented!\n");