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4c039060 | 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 | $Log$ | |
f89cabfe | 18 | Revision 1.11 2001/01/26 19:58:48 hristov |
19 | Major upgrade of AliRoot code | |
20 | ||
2ab0c725 | 21 | Revision 1.10 2000/12/21 15:30:18 fca |
22 | Correcting coding convention violations | |
23 | ||
b23a502f | 24 | Revision 1.9 2000/10/04 10:08:01 fca |
25 | Correction of minor typing mistakes | |
26 | ||
ca3a341c | 27 | Revision 1.8 2000/10/02 21:28:14 fca |
28 | Removal of useless dependecies via forward declarations | |
29 | ||
94de3818 | 30 | Revision 1.7 2000/07/12 08:56:25 fca |
31 | Coding convention correction and warning removal | |
32 | ||
8918e700 | 33 | Revision 1.6 2000/07/11 18:24:59 fca |
34 | Coding convention corrections + few minor bug fixes | |
35 | ||
aee8290b | 36 | Revision 1.5 2000/06/08 13:34:50 fca |
37 | Better control of momentum range in GenBox | |
38 | ||
de6d59e3 | 39 | Revision 1.4 1999/09/29 09:24:29 fca |
40 | Introduction of the Copyright and cvs Log | |
41 | ||
4c039060 | 42 | */ |
43 | ||
fe4da5cc | 44 | /////////////////////////////////////////////////////////////////// |
45 | // // | |
46 | // Generate the final state of the interaction as the input // | |
47 | // to the MonteCarlo // | |
48 | // | |
49 | //Begin_Html | |
50 | /* | |
1439f98e | 51 | <img src="picts/AliGeneratorClass.gif"> |
fe4da5cc | 52 | </pre> |
53 | <br clear=left> | |
54 | <font size=+2 color=red> | |
55 | <p>The responsible person for this module is | |
56 | <a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>. | |
57 | </font> | |
58 | <pre> | |
59 | */ | |
60 | //End_Html | |
61 | // // | |
62 | /////////////////////////////////////////////////////////////////// | |
63 | ||
64 | #include "AliGenerator.h" | |
b23a502f | 65 | #include "TGenerator.h" |
fe4da5cc | 66 | #include "AliRun.h" |
67 | ||
68 | ClassImp(AliGenerator) | |
69 | ||
70 | TGenerator* AliGenerator::fgMCEvGen=0; | |
71 | ||
72 | //____________________________________________________________ | |
73 | AliGenerator::AliGenerator() | |
74 | { | |
aee8290b | 75 | // |
76 | // Default constructor | |
77 | // | |
2ab0c725 | 78 | if (gAlice->GetDebug()>0) |
79 | printf("\n AliGenerator Default Constructor\n\n"); | |
4a3ba9d2 | 80 | |
fe4da5cc | 81 | gAlice->SetGenerator(this); |
de6d59e3 | 82 | SetThetaRange(); ResetBit(kThetaRange); |
83 | SetPhiRange(); ResetBit(kPhiRange); | |
84 | SetMomentumRange(); ResetBit(kMomentumRange); | |
85 | SetPtRange(); ResetBit(kPtRange); | |
86 | SetYRange(); ResetBit(kYRange); | |
fe4da5cc | 87 | SetNumberParticles(); |
4a3ba9d2 | 88 | SetTrackingFlag(); |
de6d59e3 | 89 | |
fe4da5cc | 90 | fOrigin.Set(3); |
91 | fOsigma.Set(3); | |
f89cabfe | 92 | fVertex.Set(3); |
93 | ||
fe4da5cc | 94 | fOrigin[0]=fOrigin[1]=fOrigin[2]=0; |
95 | fOsigma[0]=fOsigma[1]=fOsigma[2]=0; | |
f89cabfe | 96 | fVertex[0]=fVertex[1]=fVertex[2]=0; |
97 | ||
de6d59e3 | 98 | fVMin.Set(3); |
99 | fVMin[0]=fVMin[1]=fVMin[2]=0; | |
100 | fVMax.Set(3); | |
101 | fVMax[0]=fVMax[1]=fVMax[2]=10000; | |
fe4da5cc | 102 | } |
103 | ||
104 | //____________________________________________________________ | |
105 | AliGenerator::AliGenerator(Int_t npart) | |
106 | : TNamed(" "," ") | |
107 | { | |
aee8290b | 108 | // |
109 | // Standard constructor | |
110 | // | |
2ab0c725 | 111 | if (gAlice->GetDebug()>0) |
112 | printf("\n AliGenerator Constructor initializing number of particles \n\n"); | |
fe4da5cc | 113 | gAlice->SetGenerator(this); |
de6d59e3 | 114 | SetThetaRange(); ResetBit(kThetaRange); |
115 | SetPhiRange(); ResetBit(kPhiRange); | |
116 | SetMomentumRange(); ResetBit(kMomentumRange); | |
117 | SetPtRange(); ResetBit(kPtRange); | |
118 | SetYRange(); ResetBit(kYRange); | |
4a3ba9d2 | 119 | SetTrackingFlag(); |
de6d59e3 | 120 | |
fe4da5cc | 121 | fOrigin.Set(3); |
122 | fOsigma.Set(3); | |
f89cabfe | 123 | fVertex.Set(3); |
124 | ||
fe4da5cc | 125 | fOrigin[0]=fOrigin[1]=fOrigin[2]=0; |
126 | fOsigma[0]=fOsigma[1]=fOsigma[2]=0; | |
f89cabfe | 127 | fVertex[0]=fVertex[1]=fVertex[2]=0; |
128 | ||
fe4da5cc | 129 | fVMin.Set(3); |
130 | fVMin[0]=fVMin[1]=fVMin[2]=0; | |
131 | fVMax.Set(3); | |
132 | fVMax[0]=fVMax[1]=fVMax[2]=10000; | |
de6d59e3 | 133 | |
134 | SetNumberParticles(npart); | |
fe4da5cc | 135 | } |
136 | ||
aee8290b | 137 | //____________________________________________________________ |
138 | AliGenerator::AliGenerator(const AliGenerator &gen) : TNamed(" "," ") | |
139 | { | |
140 | // | |
141 | // Copy constructor | |
142 | // | |
143 | gen.Copy(*this); | |
144 | } | |
145 | ||
146 | //____________________________________________________________ | |
147 | AliGenerator & AliGenerator::operator=(const AliGenerator &gen) | |
148 | { | |
149 | // | |
150 | // Assignment operator | |
151 | // | |
152 | gen.Copy(*this); | |
153 | return (*this); | |
154 | } | |
155 | ||
156 | //____________________________________________________________ | |
8918e700 | 157 | void AliGenerator::Copy(AliGenerator &/* gen */) const |
aee8290b | 158 | { |
159 | // | |
160 | // Copy *this onto gen | |
161 | // | |
162 | Fatal("Copy","Not implemented!\n"); | |
163 | } | |
164 | ||
fe4da5cc | 165 | //____________________________________________________________ |
166 | AliGenerator::~AliGenerator() | |
167 | { | |
aee8290b | 168 | // |
169 | // Destructor | |
170 | // | |
fe4da5cc | 171 | fOrigin.Set(0); |
172 | fOsigma.Set(0); | |
173 | delete fgMCEvGen; | |
174 | } | |
175 | ||
176 | void AliGenerator::Init() | |
177 | { | |
aee8290b | 178 | // |
179 | // Dummy initialisation | |
180 | // | |
fe4da5cc | 181 | } |
182 | ||
94de3818 | 183 | //_______________________________________________________________________ |
184 | void AliGenerator::SetOrigin(Float_t ox, Float_t oy, Float_t oz) | |
185 | { | |
186 | // | |
187 | // Set the vertex for the generated tracks | |
188 | // | |
189 | fOrigin[0]=ox; | |
190 | fOrigin[1]=oy; | |
191 | fOrigin[2]=oz; | |
192 | } | |
193 | ||
194 | //_______________________________________________________________________ | |
195 | void AliGenerator::SetOrigin(const TLorentzVector &o) | |
196 | { | |
197 | // | |
198 | // Set the vertex for the generated tracks | |
199 | // | |
200 | fOrigin[0]=o[0]; | |
201 | fOrigin[1]=o[1]; | |
202 | fOrigin[2]=o[2]; | |
203 | } | |
204 | ||
205 | //_______________________________________________________________________ | |
206 | void AliGenerator::SetSigma(Float_t sx, Float_t sy, Float_t sz) | |
207 | { | |
208 | // | |
209 | // Set the spread of the vertex | |
210 | // | |
211 | fOsigma[0]=sx; | |
212 | fOsigma[1]=sy; | |
213 | fOsigma[2]=sz; | |
214 | } | |
215 | ||
216 | //_______________________________________________________________________ | |
217 | void AliGenerator::SetMomentumRange(Float_t pmin, Float_t pmax) | |
218 | { | |
219 | // | |
220 | // Set the momentum range for the generated particles | |
221 | // | |
222 | fPMin = pmin; | |
223 | fPMax = pmax; | |
224 | SetBit(kMomentumRange); | |
225 | } | |
226 | ||
227 | //_______________________________________________________________________ | |
228 | void AliGenerator::SetPtRange(Float_t ptmin, Float_t ptmax) | |
229 | { | |
230 | // | |
231 | // Set the Pt range for the generated particles | |
232 | // | |
233 | fPtMin = ptmin; | |
234 | fPtMax = ptmax; | |
235 | SetBit(kPtRange); | |
236 | } | |
237 | ||
238 | //_______________________________________________________________________ | |
239 | void AliGenerator::SetPhiRange(Float_t phimin, Float_t phimax) | |
240 | { | |
241 | // | |
242 | // Set the Phi range for the generated particles | |
243 | // | |
244 | fPhiMin = TMath::Pi()*phimin/180; | |
245 | fPhiMax = TMath::Pi()*phimax/180; SetBit(kPhiRange); | |
246 | } | |
247 | ||
248 | //_______________________________________________________________________ | |
ca3a341c | 249 | void AliGenerator::SetYRange(Float_t ymin, Float_t ymax) |
94de3818 | 250 | { |
251 | // | |
252 | // Set the Rapidity range for the generated particles | |
253 | // | |
254 | fYMin=ymin; | |
255 | fYMax=ymax; | |
256 | SetBit(kYRange); | |
257 | } | |
258 | ||
259 | //_______________________________________________________________________ | |
260 | void AliGenerator::SetVRange(Float_t vxmin, Float_t vxmax, | |
261 | Float_t vymin, Float_t vymax, | |
262 | Float_t vzmin, Float_t vzmax) | |
263 | { | |
264 | // | |
265 | // Set the vertex range for the generated particles | |
266 | // | |
267 | fVMin[0]=vxmin; fVMin[1]=vymin; fVMin[2]=vzmin; | |
268 | fVMax[0]=vxmax; fVMax[1]=vymax; fVMax[2]=vzmax; | |
269 | SetBit(kVertexRange); | |
270 | } | |
fe4da5cc | 271 | |
94de3818 | 272 | //_______________________________________________________________________ |
273 | void AliGenerator::SetThetaRange(Float_t thetamin, Float_t thetamax) | |
274 | { | |
275 | // | |
276 | // Set the theta range for the generated particles | |
277 | // | |
278 | fThetaMin = TMath::Pi()*thetamin/180; | |
279 | fThetaMax = TMath::Pi()*thetamax/180; SetBit(kThetaRange); | |
280 | } | |
f89cabfe | 281 | |
282 | void AliGenerator::Vertex() | |
283 | { | |
284 | // | |
285 | // Obtain vertex for current event from external source or calculated (internal) | |
286 | // | |
287 | if (fVertexSource == kInternal) { | |
288 | VertexInternal(); | |
289 | } else { | |
290 | VertexExternal(); | |
291 | } | |
292 | } | |
293 | ||
294 | ||
295 | void AliGenerator::VertexExternal() | |
296 | { | |
297 | // Dummy !!!!!! | |
298 | // Obtain vertex from external source | |
299 | // | |
300 | // Should be something like fVertex = gAlice->GetVertex() | |
301 | ||
302 | fVertex[0]=fVertex[1]=fVertex[2]=0; | |
303 | } | |
304 | ||
305 | void AliGenerator::VertexInternal() | |
306 | { | |
307 | // | |
308 | // Obtain calculated vertex | |
309 | // Default is gaussian smearing | |
310 | Float_t random[6]; | |
311 | Rndm(random,6); | |
312 | for (Int_t j = 0; j<3 ; j++) { | |
313 | fVertex[j]= | |
314 | fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
315 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
316 | } | |
317 | } | |
318 | ||
319 |