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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 | /* $Id$ */ | |
17 | // | |
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 | |
23 | // | |
24 | #include <TFile.h> | |
25 | #include <TParticle.h> | |
26 | #include <TDatabasePDG.h> | |
27 | #include <TTree.h> | |
28 | ||
29 | #include "AliGenReaderEcalJets.h" | |
30 | ||
31 | ClassImp(AliGenReaderEcalJets) | |
32 | ||
33 | ||
34 | AliGenReaderEcalJets::AliGenReaderEcalJets(): | |
35 | fNcurrent(0), | |
36 | fNparticle(0), | |
37 | fNev(0), | |
38 | fNpart(0), | |
39 | fNjet(0), | |
40 | fNsjet(0), | |
41 | fNpjet(0), | |
42 | fTreeNtuple(0) | |
43 | { | |
44 | // Default constructor | |
45 | for (Int_t i = 0; i < 200; i++) { | |
46 | if (i < 2) { | |
47 | fX[i] = 0.; | |
48 | fXtyp[i] = 0; | |
49 | } else if (i < 10) { | |
50 | fJet[i] = 0.; | |
51 | fJeta[i] = 0.; | |
52 | fJphi[i] = 0.; | |
53 | fJset[i] = 0.; | |
54 | fJseta[i] = 0.; | |
55 | fJsphi[i] = 0.; | |
56 | fJpet[i] = 0.; | |
57 | fJpeta[i] = 0.; | |
58 | fJpphi[i] = 0.; | |
59 | } else { | |
60 | fXpt[i] = 0.; | |
61 | fXeta[i] = 0.; | |
62 | fXphi[i] = 0.; | |
63 | fXid[i] = 0; | |
64 | } | |
65 | } | |
66 | } | |
67 | ||
68 | AliGenReaderEcalJets::AliGenReaderEcalJets(const AliGenReaderEcalJets &reader) | |
69 | :AliGenReader(reader), | |
70 | fNcurrent(0), | |
71 | fNparticle(0), | |
72 | fNev(0), | |
73 | fNpart(0), | |
74 | fNjet(0), | |
75 | fNsjet(0), | |
76 | fNpjet(0), | |
77 | fTreeNtuple(0) | |
78 | { | |
79 | for (Int_t i = 0; i < 200; i++) { | |
80 | if (i < 2) { | |
81 | fX[i] = 0.; | |
82 | fXtyp[i] = 0; | |
83 | } else if (i < 10) { | |
84 | fJet[i] = 0.; | |
85 | fJeta[i] = 0.; | |
86 | fJphi[i] = 0.; | |
87 | fJset[i] = 0.; | |
88 | fJseta[i] = 0.; | |
89 | fJsphi[i] = 0.; | |
90 | fJpet[i] = 0.; | |
91 | fJpeta[i] = 0.; | |
92 | fJpphi[i] = 0.; | |
93 | } else { | |
94 | fXpt[i] = 0.; | |
95 | fXeta[i] = 0.; | |
96 | fXphi[i] = 0.; | |
97 | fXid[i] = 0; | |
98 | } | |
99 | } | |
100 | ||
101 | // Copy Constructor | |
102 | reader.Copy(*this); | |
103 | } | |
104 | ||
105 | void AliGenReaderEcalJets::Init() | |
106 | { | |
107 | // | |
108 | // reset the existing file environment and open a new root file if | |
109 | // the pointer to the Fluka tree is null | |
110 | ||
111 | TFile *pFile=0; | |
112 | if (!pFile) { | |
113 | pFile = new TFile(fFileName); | |
114 | pFile->cd(); | |
115 | printf("\n I have opened %s file \n", fFileName); | |
116 | } | |
117 | // get the tree address in the Fluka boundary source file | |
118 | fTreeNtuple = (TTree*)gDirectory->Get("h1"); | |
119 | TTree *h1=fTreeNtuple; | |
120 | h1->SetMakeClass(1); | |
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); | |
142 | } | |
143 | ||
144 | Int_t AliGenReaderEcalJets::NextEvent() | |
145 | { | |
146 | // Read the next event | |
147 | Int_t nTracks=0, nread=0; | |
148 | ||
149 | TFile* pFile = fTreeNtuple->GetCurrentFile(); | |
150 | pFile->cd(); | |
151 | ||
152 | Int_t nentries = (Int_t) fTreeNtuple->GetEntries(); | |
153 | if (fNcurrent < nentries) { | |
154 | Int_t nb = (Int_t)fTreeNtuple->GetEvent(fNcurrent); | |
155 | nread += nb; | |
156 | fNcurrent++; | |
157 | printf("\n Next event contains %d tracks! \n", fNpjet); | |
158 | nTracks = fNpjet; | |
159 | fNparticle = 0; | |
160 | return nTracks; | |
161 | } | |
162 | return 0; | |
163 | } | |
164 | ||
165 | TParticle* AliGenReaderEcalJets::NextParticle() | |
166 | { | |
167 | // Read the next particle | |
168 | ||
169 | Float_t p[4]; | |
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(); | |
176 | ||
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); | |
181 | ||
182 | ||
183 | TParticle* particle = | |
184 | new TParticle(ipart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3], | |
185 | 0., 0., 0., 0.); | |
186 | fNparticle++; | |
187 | return particle; | |
188 | } | |
189 | ||
190 | ||
191 | ||
192 | AliGenReaderEcalJets& AliGenReaderEcalJets::operator=(const AliGenReaderEcalJets& rhs) | |
193 | { | |
194 | // Assignment operator | |
195 | rhs.Copy(*this); | |
196 | return (*this); | |
197 | } | |
198 | ||
199 | void AliGenReaderEcalJets::Copy(TObject&) const | |
200 | { | |
201 | // | |
202 | // Copy | |
203 | // | |
204 | Fatal("Copy","Not implemented!\n"); | |
205 | } | |
206 | ||
207 | ||
208 | ||
209 | ||
210 | ||
211 | ||
212 |