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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 | $Log$ | |
18 | Revision 1.17 2001/11/09 09:12:58 morsch | |
19 | Generalization by using AliGenReader object to read particles from file. | |
20 | ||
21 | Revision 1.16 2001/07/27 17:09:35 morsch | |
22 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
23 | to delegate either to local stack or to stack owned by AliRun. | |
24 | (Piotr Skowronski, A.M.) | |
25 | ||
26 | Revision 1.15 2001/01/23 13:29:37 morsch | |
27 | Add method SetParticleCode and enum type Code_t to handle both PDG (new ntuples) | |
28 | and GEANT3 codes (old ntuples) in input file. | |
29 | ||
30 | Revision 1.14 2000/12/21 16:24:06 morsch | |
31 | Coding convention clean-up | |
32 | ||
33 | Revision 1.13 2000/11/30 07:12:50 alibrary | |
34 | Introducing new Rndm and QA classes | |
35 | ||
36 | Revision 1.12 2000/10/27 13:54:45 morsch | |
37 | Remove explicite reference to input file from constuctor. | |
38 | ||
39 | Revision 1.11 2000/10/02 21:28:06 fca | |
40 | Removal of useless dependecies via forward declarations | |
41 | ||
42 | Revision 1.10 2000/07/11 18:24:55 fca | |
43 | Coding convention corrections + few minor bug fixes | |
44 | ||
45 | Revision 1.9 2000/06/14 15:20:09 morsch | |
46 | Include clean-up (IH) | |
47 | ||
48 | Revision 1.8 2000/06/09 20:36:44 morsch | |
49 | All coding rule violations except RS3 corrected | |
50 | ||
51 | Revision 1.7 2000/02/16 14:56:27 morsch | |
52 | Convert geant particle code into pdg code before putting particle on the stack. | |
53 | ||
54 | Revision 1.6 1999/11/09 07:38:48 fca | |
55 | Changes for compatibility with version 2.23 of ROOT | |
56 | ||
57 | Revision 1.5 1999/09/29 09:24:12 fca | |
58 | Introduction of the Copyright and cvs Log | |
59 | ||
60 | */ | |
61 | ||
62 | ||
63 | // Event generator that using an instance of type AliGenReader | |
64 | // reads particles from a file and applies cuts. | |
65 | ||
66 | #include <iostream.h> | |
67 | ||
68 | #include "AliGenExtFile.h" | |
69 | #include "AliRun.h" | |
70 | ||
71 | #include <TParticle.h> | |
72 | #include <TFile.h> | |
73 | #include <TTree.h> | |
74 | ||
75 | ||
76 | ClassImp(AliGenExtFile) | |
77 | AliGenExtFile::AliGenExtFile() | |
78 | :AliGenerator(-1) | |
79 | { | |
80 | // Constructor | |
81 | fName="ExtFile"; | |
82 | fTitle="Primaries from ext. File"; | |
83 | // | |
84 | // Read all particles | |
85 | fNpart =- 1; | |
86 | fReader = 0; | |
87 | } | |
88 | ||
89 | AliGenExtFile::AliGenExtFile(Int_t npart) | |
90 | :AliGenerator(npart) | |
91 | { | |
92 | // Constructor | |
93 | fName = "ExtFile"; | |
94 | fTitle = "Primaries from ext. File"; | |
95 | fReader = 0; | |
96 | } | |
97 | ||
98 | AliGenExtFile::AliGenExtFile(const AliGenExtFile & ExtFile) | |
99 | { | |
100 | // copy constructor | |
101 | } | |
102 | //____________________________________________________________ | |
103 | AliGenExtFile::~AliGenExtFile() | |
104 | { | |
105 | // Destructor | |
106 | delete fReader; | |
107 | } | |
108 | ||
109 | //___________________________________________________________ | |
110 | void AliGenExtFile::Init() | |
111 | { | |
112 | // Initialize | |
113 | if (fReader) fReader->Init(); | |
114 | } | |
115 | ||
116 | ||
117 | void AliGenExtFile::Generate() | |
118 | { | |
119 | // Generate particles | |
120 | ||
121 | Float_t polar[3] = {0,0,0}; | |
122 | // | |
123 | Float_t origin[3] = {0,0,0}; | |
124 | Float_t p[3]; | |
125 | Float_t random[6]; | |
126 | Int_t i, j, nt; | |
127 | // | |
128 | for (j=0;j<3;j++) origin[j]=fOrigin[j]; | |
129 | if(fVertexSmear == kPerTrack) { | |
130 | Rndm(random,6); | |
131 | for (j = 0; j < 3; j++) { | |
132 | origin[j] += fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
133 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
134 | } | |
135 | } | |
136 | ||
137 | Int_t nTracks = fReader->NextEvent(); | |
138 | if (nTracks == 0) { | |
139 | printf("\n No more events !!! !\n"); | |
140 | return; | |
141 | } | |
142 | ||
143 | for (i = 0; i < nTracks; i++) { | |
144 | TParticle* iparticle = fReader->NextParticle(); | |
145 | Double_t theta = iparticle->Theta(); | |
146 | Double_t phi = iparticle->Phi(); | |
147 | if (phi > TMath::Pi()) phi -= 2.*TMath::Pi(); | |
148 | Double_t pmom = iparticle->P(); | |
149 | Double_t pz = iparticle->Pz(); | |
150 | Double_t e = iparticle->Energy(); | |
151 | Double_t pt = iparticle->Pt(); | |
152 | Double_t y; | |
153 | ||
154 | if ((e-pz) == 0) { | |
155 | y = 20.; | |
156 | } else if ((e+pz) == 0.) { | |
157 | y = -20.; | |
158 | } else { | |
159 | y = 0.5*TMath::Log((e+pz)/(e-pz)); | |
160 | } | |
161 | ||
162 | if(theta < fThetaMin || theta > fThetaMax || | |
163 | phi < fPhiMin || phi > fPhiMax || | |
164 | pmom < fPMin || pmom > fPMax || | |
165 | pt < fPtMin || pt > fPtMax || | |
166 | y < fYMin || y > fYMax ) | |
167 | { | |
168 | printf("\n Not selected %d %f %f %f %f %f", i, theta, phi, pmom, pt, y); | |
169 | delete iparticle; | |
170 | continue; | |
171 | } | |
172 | p[0] = iparticle->Px(); | |
173 | p[1] = iparticle->Py(); | |
174 | p[2] = iparticle->Pz(); | |
175 | Int_t idpart = iparticle->GetPdgCode(); | |
176 | if(fVertexSmear==kPerTrack) { | |
177 | Rndm(random,6); | |
178 | for (j = 0; j < 3; j++) { | |
179 | origin[j]=fOrigin[j] | |
180 | +fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
181 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
182 | } | |
183 | } | |
184 | SetTrack(fTrackIt,-1,idpart,p,origin,polar,0,kPPrimary,nt); | |
185 | delete iparticle; | |
186 | } | |
187 | TFile *pFile=0; | |
188 | // Get AliRun object or create it | |
189 | if (!gAlice) { | |
190 | gAlice = (AliRun*)pFile->Get("gAlice"); | |
191 | if (gAlice) printf("AliRun object found on file\n"); | |
192 | if (!gAlice) gAlice = new AliRun("gAlice","Alice test program"); | |
193 | } | |
194 | TTree *fAli=gAlice->TreeK(); | |
195 | if (fAli) pFile =fAli->GetCurrentFile(); | |
196 | pFile->cd(); | |
197 | } | |
198 | ||
199 | ||
200 | AliGenExtFile& AliGenExtFile::operator=(const AliGenExtFile& rhs) | |
201 | { | |
202 | // Assignment operator | |
203 | return *this; | |
204 | } | |
205 | ||
206 | ||
207 | ||
208 | ||
209 | ||
210 | ||
211 | ||
212 |