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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 | ||
17 | /* $Id$ */ | |
18 | ||
19 | // Read the old ALICE event format based on CW-ntuples | |
20 | // http://consult.cern.ch/alice/Internal_Notes/1995/32/abstract | |
21 | // .cwn file have to be converted to .root using h2root | |
22 | // Use SetFileName(file) to read from "file" | |
23 | // Author: andreas.morsch@cern.ch | |
24 | ||
25 | #include <TFile.h> | |
26 | #include <TParticle.h> | |
27 | #include <TDatabasePDG.h> | |
28 | #include <TTree.h> | |
29 | #include <TVirtualMC.h> | |
30 | ||
31 | #include "AliGenReaderCwn.h" | |
32 | ||
33 | ClassImp(AliGenReaderCwn) | |
34 | ||
35 | AliGenReaderCwn::AliGenReaderCwn(): | |
36 | fNcurrent(0), | |
37 | fNparticle(0), | |
38 | fNparticleMax(0), | |
39 | fTreeNtuple(0), | |
40 | fNihead(0), | |
41 | fNrhead(0), | |
42 | fIdpart(0), | |
43 | fTheta(0.), | |
44 | fPhi(0.), | |
45 | fP(0.), | |
46 | fE(0.) | |
47 | { | |
48 | // Default constructor | |
49 | } | |
50 | ||
51 | AliGenReaderCwn::AliGenReaderCwn(const AliGenReaderCwn &reader): | |
52 | AliGenReader(reader), | |
53 | fNcurrent(0), | |
54 | fNparticle(0), | |
55 | fNparticleMax(0), | |
56 | fTreeNtuple(0), | |
57 | fNihead(0), | |
58 | fNrhead(0), | |
59 | fIdpart(0), | |
60 | fTheta(0.), | |
61 | fPhi(0.), | |
62 | fP(0.), | |
63 | fE(0.) | |
64 | { | |
65 | // Copy constructor | |
66 | reader.Copy(*this); | |
67 | } | |
68 | ||
69 | ||
70 | AliGenReaderCwn::~AliGenReaderCwn() | |
71 | { | |
72 | delete fTreeNtuple; | |
73 | } | |
74 | ||
75 | void AliGenReaderCwn::Init() | |
76 | { | |
77 | // | |
78 | // reset the existing file environment and open a new root file if | |
79 | // the pointer to the Fluka tree is null | |
80 | ||
81 | TFile *pFile=0; | |
82 | if (!pFile) { | |
83 | pFile = new TFile(fFileName); | |
84 | pFile->cd(); | |
85 | printf("\n I have opened %s file \n", fFileName); | |
86 | } | |
87 | // get the tree address in the Fluka boundary source file | |
88 | fTreeNtuple = (TTree*)gDirectory->Get("h888"); | |
89 | ||
90 | TTree *h2=fTreeNtuple; | |
91 | //Set branch addresses | |
92 | h2->SetBranchAddress("Nihead",&fNihead); | |
93 | h2->SetBranchAddress("Ihead",fIhead); | |
94 | h2->SetBranchAddress("Nrhead",&fNrhead); | |
95 | h2->SetBranchAddress("Rhead",fRhead); | |
96 | h2->SetBranchAddress("Idpart",&fIdpart); | |
97 | h2->SetBranchAddress("Theta",&fTheta); | |
98 | h2->SetBranchAddress("Phi",&fPhi); | |
99 | h2->SetBranchAddress("P",&fP); | |
100 | h2->SetBranchAddress("E",&fE); | |
101 | } | |
102 | ||
103 | Int_t AliGenReaderCwn::NextEvent() | |
104 | { | |
105 | // Read the next event | |
106 | Int_t nTracks; | |
107 | fNparticle = 0; | |
108 | TFile* pFile = fTreeNtuple->GetCurrentFile(); | |
109 | pFile->cd(); | |
110 | ||
111 | Int_t nentries = (Int_t) fTreeNtuple->GetEntries(); | |
112 | if (fNcurrent < nentries) { | |
113 | fNcurrent++; | |
114 | ||
115 | Int_t i5=fIhead[4]; | |
116 | Int_t i6=fIhead[5]; | |
117 | if (i5==0) { | |
118 | printf("\n This should never happen !\n"); | |
119 | nTracks = 0; | |
120 | } else { | |
121 | printf("\n Next event contains %d tracks! \n", i6); | |
122 | nTracks = i6; | |
123 | } | |
124 | fNparticleMax = nTracks; | |
125 | return nTracks; | |
126 | } | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | TParticle* AliGenReaderCwn::NextParticle() | |
132 | { | |
133 | // | |
134 | // | |
135 | Float_t prwn; | |
136 | Float_t p[4]; | |
137 | // Read the next particle | |
138 | if (fCode == kGEANT3) fIdpart=gMC->PDGFromId(fIdpart); | |
139 | Double_t amass = TDatabasePDG::Instance()->GetParticle(fIdpart)->Mass(); | |
140 | if(fE<=amass) { | |
141 | Warning("Generate","Particle %d E = %f mass = %f %f %f \n", | |
142 | fIdpart,fE,amass, fPhi, fTheta); | |
143 | prwn=0; | |
144 | } else { | |
145 | prwn=sqrt((fE+amass)*(fE-amass)); | |
146 | } | |
147 | ||
148 | fTheta *= TMath::Pi()/180.; | |
149 | fPhi = (fPhi-180)*TMath::Pi()/180.; | |
150 | p[0] = prwn*TMath::Sin(fTheta)*TMath::Cos(fPhi); | |
151 | p[1] = prwn*TMath::Sin(fTheta)*TMath::Sin(fPhi); | |
152 | p[2] = prwn*TMath::Cos(fTheta); | |
153 | p[3] = fE; | |
154 | TParticle* particle = new TParticle(fIdpart, 0, -1, -1, -1, -1, p[0], p[1], p[2], p[3], 0., 0., 0., 0.); | |
155 | fNcurrent++; | |
156 | fNparticle++; | |
157 | return particle; | |
158 | } | |
159 | ||
160 | ||
161 | ||
162 | AliGenReaderCwn& AliGenReaderCwn::operator=(const AliGenReaderCwn& rhs) | |
163 | { | |
164 | // Assignment operator | |
165 | rhs.Copy(*this); | |
166 | return *this; | |
167 | } | |
168 | ||
169 | void AliGenReaderCwn::Copy(TObject&) const | |
170 | { | |
171 | // | |
172 | // Copy | |
173 | // | |
174 | Fatal("Copy","Not implemented!\n"); | |
175 | } | |
176 | ||
177 | ||
178 | ||
179 |