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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 1.21 2002/04/26 10:39:31 morsch | |
19 | AliGenExtFile derives from AliGenMC. Generate() uses methods from AliGenMC (N. Carrer) | |
20 | ||
21 | Revision 1.20 2002/03/22 09:43:28 morsch | |
22 | Don't delete the TParticle. | |
23 | ||
24 | Revision 1.19 2002/02/08 16:50:50 morsch | |
25 | Add name and title in constructor. | |
26 | ||
27 | Revision 1.18 2001/11/12 14:31:00 morsch | |
28 | Memory leaks fixed. (M. Bondila) | |
29 | ||
30 | Revision 1.17 2001/11/09 09:12:58 morsch | |
31 | Generalization by using AliGenReader object to read particles from file. | |
32 | ||
33 | Revision 1.16 2001/07/27 17:09:35 morsch | |
34 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
35 | to delegate either to local stack or to stack owned by AliRun. | |
36 | (Piotr Skowronski, A.M.) | |
37 | ||
38 | Revision 1.15 2001/01/23 13:29:37 morsch | |
39 | Add method SetParticleCode and enum type Code_t to handle both PDG (new ntuples) | |
40 | and GEANT3 codes (old ntuples) in input file. | |
41 | ||
42 | Revision 1.14 2000/12/21 16:24:06 morsch | |
43 | Coding convention clean-up | |
44 | ||
45 | Revision 1.13 2000/11/30 07:12:50 alibrary | |
46 | Introducing new Rndm and QA classes | |
47 | ||
48 | Revision 1.12 2000/10/27 13:54:45 morsch | |
49 | Remove explicite reference to input file from constuctor. | |
50 | ||
51 | Revision 1.11 2000/10/02 21:28:06 fca | |
52 | Removal of useless dependecies via forward declarations | |
53 | ||
54 | Revision 1.10 2000/07/11 18:24:55 fca | |
55 | Coding convention corrections + few minor bug fixes | |
56 | ||
57 | Revision 1.9 2000/06/14 15:20:09 morsch | |
58 | Include clean-up (IH) | |
59 | ||
60 | Revision 1.8 2000/06/09 20:36:44 morsch | |
61 | All coding rule violations except RS3 corrected | |
62 | ||
63 | Revision 1.7 2000/02/16 14:56:27 morsch | |
64 | Convert geant particle code into pdg code before putting particle on the stack. | |
65 | ||
66 | Revision 1.6 1999/11/09 07:38:48 fca | |
67 | Changes for compatibility with version 2.23 of ROOT | |
68 | ||
69 | Revision 1.5 1999/09/29 09:24:12 fca | |
70 | Introduction of the Copyright and cvs Log | |
71 | ||
72 | */ | |
73 | ||
74 | ||
75 | // Event generator that using an instance of type AliGenReader | |
76 | // reads particles from a file and applies cuts. | |
77 | ||
78 | #include <iostream.h> | |
79 | ||
80 | #include "AliGenExtFile.h" | |
81 | #include "AliRun.h" | |
82 | ||
83 | #include <TParticle.h> | |
84 | #include <TFile.h> | |
85 | #include <TTree.h> | |
86 | ||
87 | ||
88 | ClassImp(AliGenExtFile) | |
89 | ||
90 | AliGenExtFile::AliGenExtFile() | |
91 | :AliGenMC() | |
92 | { | |
93 | // Constructor | |
94 | // | |
95 | // Read all particles | |
96 | fNpart =- 1; | |
97 | fReader = 0; | |
98 | } | |
99 | ||
100 | AliGenExtFile::AliGenExtFile(Int_t npart) | |
101 | :AliGenMC(npart) | |
102 | { | |
103 | // Constructor | |
104 | fName = "ExtFile"; | |
105 | fTitle = "Primaries from ext. File"; | |
106 | fReader = 0; | |
107 | } | |
108 | ||
109 | AliGenExtFile::AliGenExtFile(const AliGenExtFile & ExtFile) | |
110 | { | |
111 | // copy constructor | |
112 | } | |
113 | //____________________________________________________________ | |
114 | AliGenExtFile::~AliGenExtFile() | |
115 | { | |
116 | // Destructor | |
117 | delete fReader; | |
118 | } | |
119 | ||
120 | //___________________________________________________________ | |
121 | void AliGenExtFile::Init() | |
122 | { | |
123 | // Initialize | |
124 | if (fReader) fReader->Init(); | |
125 | } | |
126 | ||
127 | ||
128 | void AliGenExtFile::Generate() | |
129 | { | |
130 | // Generate particles | |
131 | ||
132 | Float_t polar[3] = {0,0,0}; | |
133 | // | |
134 | Float_t origin[3] = {0,0,0}; | |
135 | Float_t p[3]; | |
136 | Float_t random[6]; | |
137 | Int_t i, j, nt; | |
138 | // | |
139 | for (j=0;j<3;j++) origin[j]=fOrigin[j]; | |
140 | if(fVertexSmear == kPerTrack) { | |
141 | Rndm(random,6); | |
142 | for (j = 0; j < 3; j++) { | |
143 | origin[j] += fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
144 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
145 | } | |
146 | } | |
147 | ||
148 | while(1) { | |
149 | Int_t nTracks = fReader->NextEvent(); | |
150 | if (nTracks == 0) { | |
151 | // printf("\n No more events !!! !\n"); | |
152 | Warning("AliGenExtFile::Generate","\nNo more events in external file!!!\nLast event may be empty or incomplete.\n"); | |
153 | return; | |
154 | } | |
155 | ||
156 | // | |
157 | // Particle selection loop | |
158 | // | |
159 | // The selction criterium for the external file generator is as follows: | |
160 | // | |
161 | // 1) All tracs are subjects to the cuts defined by AliGenerator, i.e. | |
162 | // fThetaMin, fThetaMax, fPhiMin, fPhiMax, fPMin, fPMax, fPtMin, fPtMax, | |
163 | // fYMin, fYMax. | |
164 | // If the particle does not satisfy these cuts, it is not put on the | |
165 | // stack. | |
166 | // 2) If fCutOnChild and some specific child is selected (e.g. if | |
167 | // fForceDecay==kSemiElectronic) the event is rejected if NOT EVEN ONE | |
168 | // child falls into the child-cuts. | |
169 | if(fCutOnChild) { | |
170 | // Count the selected children | |
171 | Int_t nSelected = 0; | |
172 | ||
173 | for (i = 0; i < nTracks; i++) { | |
174 | TParticle* iparticle = fReader->NextParticle(); | |
175 | Int_t kf = CheckPDGCode(iparticle->GetPdgCode()); | |
176 | kf = TMath::Abs(kf); | |
177 | if (ChildSelected(kf) && KinematicSelection(iparticle, 1)) { | |
178 | nSelected++; | |
179 | } | |
180 | } | |
181 | if (!nSelected) continue; // No particle selected: Go to next event | |
182 | fReader->RewindEvent(); | |
183 | } | |
184 | ||
185 | // | |
186 | // Stack filling loop | |
187 | // | |
188 | for (i = 0; i < nTracks; i++) { | |
189 | ||
190 | TParticle* iparticle = fReader->NextParticle(); | |
191 | if (!KinematicSelection(iparticle,0)) { | |
192 | Double_t pz = iparticle->Pz(); | |
193 | Double_t e = iparticle->Energy(); | |
194 | Double_t y; | |
195 | if ((e-pz) == 0) { | |
196 | y = 20.; | |
197 | } else if ((e+pz) == 0.) { | |
198 | y = -20.; | |
199 | } else { | |
200 | y = 0.5*TMath::Log((e+pz)/(e-pz)); | |
201 | } | |
202 | printf("\n Not selected %d %f %f %f %f %f", i, | |
203 | iparticle->Theta(), | |
204 | iparticle->Phi(), | |
205 | iparticle->P(), | |
206 | iparticle->Pt(), | |
207 | y); | |
208 | delete iparticle; | |
209 | continue; | |
210 | } | |
211 | p[0] = iparticle->Px(); | |
212 | p[1] = iparticle->Py(); | |
213 | p[2] = iparticle->Pz(); | |
214 | Int_t idpart = iparticle->GetPdgCode(); | |
215 | if(fVertexSmear==kPerTrack) { | |
216 | Rndm(random,6); | |
217 | for (j = 0; j < 3; j++) { | |
218 | origin[j]=fOrigin[j] | |
219 | +fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
220 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
221 | } | |
222 | } | |
223 | Int_t decayed = iparticle->GetFirstDaughter(); | |
224 | Int_t doTracking = fTrackIt && (decayed < 0) && | |
225 | (TMath::Abs(idpart) > 10); | |
226 | // printf("*** pdg, first daughter, trk = %d, %d, %d\n", | |
227 | // idpart,decayed, doTracking); | |
228 | SetTrack(doTracking,-1,idpart,p,origin,polar,0,kPPrimary,nt); | |
229 | KeepTrack(nt); | |
230 | } // track loop | |
231 | ||
232 | break; | |
233 | ||
234 | } // event loop | |
235 | ||
236 | SetHighWaterMark(nt); | |
237 | CdEventFile(); | |
238 | } | |
239 | ||
240 | void AliGenExtFile::CdEventFile() | |
241 | { | |
242 | // CD back to the event file | |
243 | TFile *pFile=0; | |
244 | if (!gAlice) { | |
245 | gAlice = (AliRun*)pFile->Get("gAlice"); | |
246 | if (gAlice) printf("AliRun object found on file\n"); | |
247 | if (!gAlice) gAlice = new AliRun("gAlice","Alice test program"); | |
248 | } | |
249 | TTree *fAli=gAlice->TreeK(); | |
250 | if (fAli) pFile =fAli->GetCurrentFile(); | |
251 | pFile->cd(); | |
252 | } | |
253 | ||
254 | ||
255 | AliGenExtFile& AliGenExtFile::operator=(const AliGenExtFile& rhs) | |
256 | { | |
257 | // Assignment operator | |
258 | return *this; | |
259 | } | |
260 | ||
261 | ||
262 | ||
263 | ||
264 | ||
265 | ||
266 | ||
267 |