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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 | ||
acd84897 | 16 | /* $Id$ */ |
4c039060 | 17 | |
5d8718b8 | 18 | //----------------------------------------------------------------- |
19 | // Generate the final state of the interaction as the input | |
20 | // to the MonteCarlo | |
21 | // Author: A.Morsch | |
22 | //----------------------------------------------------------------- | |
fe4da5cc | 23 | //Begin_Html |
24 | /* | |
1439f98e | 25 | <img src="picts/AliGeneratorClass.gif"> |
fe4da5cc | 26 | </pre> |
27 | <br clear=left> | |
28 | <font size=+2 color=red> | |
29 | <p>The responsible person for this module is | |
30 | <a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>. | |
31 | </font> | |
32 | <pre> | |
33 | */ | |
34 | //End_Html | |
35 | // // | |
36 | /////////////////////////////////////////////////////////////////// | |
116cbefd | 37 | #include <TGenerator.h> |
af7ba10c | 38 | #include <TMCProcess.h> |
fe4da5cc | 39 | |
594d8990 | 40 | #include "AliLog.h" |
116cbefd | 41 | #include "AliCollisionGeometry.h" |
e2afb3b6 | 42 | #include "AliConfig.h" |
fe4da5cc | 43 | #include "AliGenerator.h" |
44 | #include "AliRun.h" | |
69a313ec | 45 | #include "AliStack.h" |
5d12ce38 | 46 | #include "AliMC.h" |
14248849 | 47 | #include "AliVertexGenerator.h" |
69a313ec | 48 | |
fe4da5cc | 49 | ClassImp(AliGenerator) |
50 | ||
fe4da5cc | 51 | |
e2afb3b6 | 52 | //_______________________________________________________________________ |
53 | AliGenerator::AliGenerator(): | |
90e48c0c | 54 | TNamed(), |
55 | AliRndm(), | |
f559aa82 | 56 | fMCEvGen(0), |
e2afb3b6 | 57 | fThetaMin(0), |
58 | fThetaMax(0), | |
59 | fPhiMin(0), | |
60 | fPhiMax(0), | |
61 | fPMin(0), | |
62 | fPMax(0), | |
63 | fPtMin(0), | |
64 | fPtMax(0), | |
65 | fYMin(0), | |
66 | fYMax(0), | |
67 | fVMin(3), | |
68 | fVMax(3), | |
69 | fNpart(0), | |
70 | fParentWeight(0), | |
71 | fChildWeight(0), | |
72 | fAnalog(0), | |
73 | fVertexSmear(kNoSmear), | |
0b910a04 | 74 | fVertexSource(kInternal), |
e2afb3b6 | 75 | fCutVertexZ(0), |
f0831961 | 76 | fPileUpTimeWindow(-1.), |
e2afb3b6 | 77 | fTrackIt(0), |
90e48c0c | 78 | fVertexGenerator(0), |
e2afb3b6 | 79 | fOrigin(3), |
80 | fOsigma(3), | |
81 | fVertex(3), | |
2c5b3727 | 82 | fStack(0), |
d6eec420 | 83 | fContainer(0), |
e7c989e4 | 84 | fCollisionGeometry(0), |
85 | fEnergyCMS(0), | |
86 | fAProjectile(0), | |
87 | fZProjectile(0), | |
88 | fATarget(0), | |
89 | fZTarget(0), | |
90 | fProjectile(""), | |
91 | fTarget("") | |
fe4da5cc | 92 | { |
aee8290b | 93 | // |
94 | // Default constructor | |
95 | // | |
f98e49f0 | 96 | if (gAlice) { |
594d8990 | 97 | AliDebug(1, "AliGenerator Default Constructor"); |
5d12ce38 | 98 | AliMC * mc = gAlice->GetMCApp(); |
99 | if (mc) mc->SetGenerator(this); | |
f98e49f0 | 100 | } |
101 | ||
de6d59e3 | 102 | SetThetaRange(); ResetBit(kThetaRange); |
103 | SetPhiRange(); ResetBit(kPhiRange); | |
104 | SetMomentumRange(); ResetBit(kMomentumRange); | |
105 | SetPtRange(); ResetBit(kPtRange); | |
106 | SetYRange(); ResetBit(kYRange); | |
fe4da5cc | 107 | SetNumberParticles(); |
4a3ba9d2 | 108 | SetTrackingFlag(); |
f98e49f0 | 109 | SetCutVertexZ(); |
110 | ||
de6d59e3 | 111 | |
fe4da5cc | 112 | fOrigin[0]=fOrigin[1]=fOrigin[2]=0; |
113 | fOsigma[0]=fOsigma[1]=fOsigma[2]=0; | |
f89cabfe | 114 | fVertex[0]=fVertex[1]=fVertex[2]=0; |
115 | ||
de6d59e3 | 116 | fVMin[0]=fVMin[1]=fVMin[2]=0; |
de6d59e3 | 117 | fVMax[0]=fVMax[1]=fVMax[2]=10000; |
fe4da5cc | 118 | } |
119 | ||
e2afb3b6 | 120 | //_______________________________________________________________________ |
121 | AliGenerator::AliGenerator(Int_t npart): | |
90e48c0c | 122 | TNamed(), |
123 | AliRndm(), | |
f559aa82 | 124 | fMCEvGen(0), |
e2afb3b6 | 125 | fThetaMin(0), |
126 | fThetaMax(0), | |
127 | fPhiMin(0), | |
128 | fPhiMax(0), | |
129 | fPMin(0), | |
130 | fPMax(0), | |
131 | fPtMin(0), | |
132 | fPtMax(0), | |
133 | fYMin(0), | |
134 | fYMax(0), | |
135 | fVMin(3), | |
136 | fVMax(3), | |
137 | fNpart(0), | |
138 | fParentWeight(0), | |
139 | fChildWeight(0), | |
140 | fAnalog(0), | |
141 | fVertexSmear(kNoSmear), | |
0b910a04 | 142 | fVertexSource(kInternal), |
e2afb3b6 | 143 | fCutVertexZ(0), |
f0831961 | 144 | fPileUpTimeWindow(-1.), |
e2afb3b6 | 145 | fTrackIt(0), |
90e48c0c | 146 | fVertexGenerator(0), |
e2afb3b6 | 147 | fOrigin(3), |
148 | fOsigma(3), | |
149 | fVertex(3), | |
2c5b3727 | 150 | fStack(0), |
d6eec420 | 151 | fContainer(0), |
e7c989e4 | 152 | fCollisionGeometry(0), |
153 | fEnergyCMS(0), | |
154 | fAProjectile(0), | |
155 | fZProjectile(0), | |
156 | fATarget(0), | |
157 | fZTarget(0), | |
158 | fProjectile(""), | |
159 | fTarget("") | |
fe4da5cc | 160 | { |
aee8290b | 161 | // |
162 | // Standard constructor | |
163 | // | |
f98e49f0 | 164 | if (gAlice) { |
594d8990 | 165 | AliDebug(1, "AliGenerator Constructor initializing number of particles"); |
5d12ce38 | 166 | AliMC * mc = gAlice->GetMCApp(); |
167 | if (mc) mc->SetGenerator(this); | |
f98e49f0 | 168 | } |
169 | ||
de6d59e3 | 170 | SetThetaRange(); ResetBit(kThetaRange); |
171 | SetPhiRange(); ResetBit(kPhiRange); | |
172 | SetMomentumRange(); ResetBit(kMomentumRange); | |
173 | SetPtRange(); ResetBit(kPtRange); | |
174 | SetYRange(); ResetBit(kYRange); | |
4a3ba9d2 | 175 | SetTrackingFlag(); |
f98e49f0 | 176 | SetCutVertexZ(); |
de6d59e3 | 177 | |
fe4da5cc | 178 | fOrigin[0]=fOrigin[1]=fOrigin[2]=0; |
179 | fOsigma[0]=fOsigma[1]=fOsigma[2]=0; | |
f89cabfe | 180 | fVertex[0]=fVertex[1]=fVertex[2]=0; |
181 | ||
fe4da5cc | 182 | fVMin[0]=fVMin[1]=fVMin[2]=0; |
fe4da5cc | 183 | fVMax[0]=fVMax[1]=fVMax[2]=10000; |
de6d59e3 | 184 | |
185 | SetNumberParticles(npart); | |
9e1a0ddb | 186 | |
69a313ec | 187 | AliConfig::Instance()->Add(this); |
fe4da5cc | 188 | } |
189 | ||
e2afb3b6 | 190 | //_______________________________________________________________________ |
fe4da5cc | 191 | AliGenerator::~AliGenerator() |
192 | { | |
aee8290b | 193 | // |
194 | // Destructor | |
195 | // | |
fe4da5cc | 196 | fOrigin.Set(0); |
197 | fOsigma.Set(0); | |
a08cd31a | 198 | if (fMCEvGen) { |
199 | delete fMCEvGen; | |
200 | fMCEvGen=0; | |
475e6235 | 201 | } |
fe4da5cc | 202 | } |
203 | ||
e2afb3b6 | 204 | //_______________________________________________________________________ |
fe4da5cc | 205 | void AliGenerator::Init() |
206 | { | |
aee8290b | 207 | // |
208 | // Dummy initialisation | |
209 | // | |
fe4da5cc | 210 | } |
211 | ||
94de3818 | 212 | //_______________________________________________________________________ |
213 | void AliGenerator::SetOrigin(Float_t ox, Float_t oy, Float_t oz) | |
214 | { | |
215 | // | |
216 | // Set the vertex for the generated tracks | |
217 | // | |
218 | fOrigin[0]=ox; | |
219 | fOrigin[1]=oy; | |
220 | fOrigin[2]=oz; | |
221 | } | |
222 | ||
223 | //_______________________________________________________________________ | |
224 | void AliGenerator::SetOrigin(const TLorentzVector &o) | |
225 | { | |
226 | // | |
227 | // Set the vertex for the generated tracks | |
228 | // | |
229 | fOrigin[0]=o[0]; | |
230 | fOrigin[1]=o[1]; | |
231 | fOrigin[2]=o[2]; | |
232 | } | |
233 | ||
234 | //_______________________________________________________________________ | |
235 | void AliGenerator::SetSigma(Float_t sx, Float_t sy, Float_t sz) | |
236 | { | |
237 | // | |
238 | // Set the spread of the vertex | |
239 | // | |
240 | fOsigma[0]=sx; | |
241 | fOsigma[1]=sy; | |
242 | fOsigma[2]=sz; | |
243 | } | |
244 | ||
245 | //_______________________________________________________________________ | |
246 | void AliGenerator::SetMomentumRange(Float_t pmin, Float_t pmax) | |
247 | { | |
248 | // | |
249 | // Set the momentum range for the generated particles | |
250 | // | |
251 | fPMin = pmin; | |
252 | fPMax = pmax; | |
253 | SetBit(kMomentumRange); | |
254 | } | |
255 | ||
256 | //_______________________________________________________________________ | |
257 | void AliGenerator::SetPtRange(Float_t ptmin, Float_t ptmax) | |
258 | { | |
259 | // | |
260 | // Set the Pt range for the generated particles | |
261 | // | |
262 | fPtMin = ptmin; | |
263 | fPtMax = ptmax; | |
264 | SetBit(kPtRange); | |
265 | } | |
266 | ||
267 | //_______________________________________________________________________ | |
268 | void AliGenerator::SetPhiRange(Float_t phimin, Float_t phimax) | |
269 | { | |
270 | // | |
271 | // Set the Phi range for the generated particles | |
272 | // | |
273 | fPhiMin = TMath::Pi()*phimin/180; | |
c34578e7 | 274 | fPhiMax = TMath::Pi()*phimax/180; |
275 | SetBit(kPhiRange); | |
94de3818 | 276 | } |
277 | ||
278 | //_______________________________________________________________________ | |
ca3a341c | 279 | void AliGenerator::SetYRange(Float_t ymin, Float_t ymax) |
94de3818 | 280 | { |
281 | // | |
282 | // Set the Rapidity range for the generated particles | |
283 | // | |
284 | fYMin=ymin; | |
285 | fYMax=ymax; | |
286 | SetBit(kYRange); | |
287 | } | |
288 | ||
289 | //_______________________________________________________________________ | |
290 | void AliGenerator::SetVRange(Float_t vxmin, Float_t vxmax, | |
291 | Float_t vymin, Float_t vymax, | |
292 | Float_t vzmin, Float_t vzmax) | |
293 | { | |
294 | // | |
295 | // Set the vertex range for the generated particles | |
296 | // | |
297 | fVMin[0]=vxmin; fVMin[1]=vymin; fVMin[2]=vzmin; | |
298 | fVMax[0]=vxmax; fVMax[1]=vymax; fVMax[2]=vzmax; | |
299 | SetBit(kVertexRange); | |
300 | } | |
fe4da5cc | 301 | |
94de3818 | 302 | //_______________________________________________________________________ |
303 | void AliGenerator::SetThetaRange(Float_t thetamin, Float_t thetamax) | |
304 | { | |
305 | // | |
306 | // Set the theta range for the generated particles | |
307 | // | |
308 | fThetaMin = TMath::Pi()*thetamin/180; | |
c34578e7 | 309 | fThetaMax = TMath::Pi()*thetamax/180; |
310 | SetBit(kThetaRange); | |
94de3818 | 311 | } |
f89cabfe | 312 | |
313 | void AliGenerator::Vertex() | |
314 | { | |
315 | // | |
316 | // Obtain vertex for current event from external source or calculated (internal) | |
317 | // | |
318 | if (fVertexSource == kInternal) { | |
319 | VertexInternal(); | |
0b910a04 | 320 | } else if (fVertexSource == kContainer) { |
321 | ; | |
322 | } else if (fVertexSource == kExternal) { | |
f89cabfe | 323 | VertexExternal(); |
324 | } | |
325 | } | |
326 | ||
e2afb3b6 | 327 | //_______________________________________________________________________ |
f89cabfe | 328 | void AliGenerator::VertexExternal() |
329 | { | |
f89cabfe | 330 | // |
14248849 | 331 | // Obtain vertex from external source (vertex generator) |
332 | // | |
333 | TVector3 vertex = fVertexGenerator->GetVertex(); | |
334 | fVertex[0] = vertex.X(); | |
335 | fVertex[1] = vertex.Y(); | |
336 | fVertex[2] = vertex.Z(); | |
f89cabfe | 337 | } |
338 | ||
e2afb3b6 | 339 | //_______________________________________________________________________ |
f89cabfe | 340 | void AliGenerator::VertexInternal() |
341 | { | |
342 | // | |
343 | // Obtain calculated vertex | |
344 | // Default is gaussian smearing | |
345 | Float_t random[6]; | |
0b910a04 | 346 | Float_t dv[3]; |
347 | Int_t j; | |
0b910a04 | 348 | dv[2] = 1.e10; |
c1f70070 | 349 | if (!TestBit(kVertexRange)) { |
350 | while(TMath::Abs(dv[2]) > fCutVertexZ*fOsigma[2]) { | |
351 | Rndm(random,6); | |
352 | for (j=0; j < 3; j++) { | |
353 | dv[j] = fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
354 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
355 | } | |
0b910a04 | 356 | } |
c1f70070 | 357 | for (j=0; j < 3; j++) fVertex[j] = fOrigin[j] + dv[j]; |
358 | } else { | |
359 | Rndm(random,3); | |
360 | for (j=0; j < 3; j++) | |
361 | fVertex[j] = fVMin[j] + random[j] * (fVMax[j] - fVMin[j]); | |
f89cabfe | 362 | } |
363 | } | |
364 | ||
e2afb3b6 | 365 | //_______________________________________________________________________ |
642f15cf | 366 | void AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg, |
69a313ec | 367 | Float_t *pmom, Float_t *vpos, Float_t *polar, |
98490ea9 | 368 | Float_t tof, TMCProcess mech, Int_t &ntr, |
47c8bcbe | 369 | Float_t weight, Int_t is) |
69a313ec | 370 | { |
116cbefd | 371 | // |
372 | // Loads one track on the stack | |
373 | // | |
f0831961 | 374 | |
69a313ec | 375 | if (fStack) |
642f15cf | 376 | fStack->PushTrack(done, parent, pdg, pmom, vpos, polar, tof, |
47c8bcbe | 377 | mech, ntr, weight, is); |
69a313ec | 378 | else |
5d12ce38 | 379 | gAlice->GetMCApp()->PushTrack(done, parent, pdg, pmom, vpos, polar, tof, |
47c8bcbe | 380 | mech, ntr, weight, is); |
69a313ec | 381 | } |
e2afb3b6 | 382 | |
383 | //_______________________________________________________________________ | |
642f15cf | 384 | void AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg, |
69a313ec | 385 | Double_t px, Double_t py, Double_t pz, Double_t e, |
386 | Double_t vx, Double_t vy, Double_t vz, Double_t tof, | |
387 | Double_t polx, Double_t poly, Double_t polz, | |
98490ea9 | 388 | TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is) |
69a313ec | 389 | { |
116cbefd | 390 | // |
391 | // Loads one track on the stack | |
392 | // | |
69a313ec | 393 | |
394 | if (fStack) | |
642f15cf | 395 | fStack->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof, |
47c8bcbe | 396 | polx, poly, polz, mech, ntr, weight, is); |
69a313ec | 397 | else |
5d12ce38 | 398 | gAlice->GetMCApp()->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof, |
47c8bcbe | 399 | polx, poly, polz, mech, ntr, weight, is); |
69a313ec | 400 | } |
f89cabfe | 401 | |
69a313ec | 402 | |
e2afb3b6 | 403 | //_______________________________________________________________________ |
69a313ec | 404 | void AliGenerator:: KeepTrack(Int_t itrack) |
405 | { | |
116cbefd | 406 | // |
407 | // Declare a track permanent on the stack | |
408 | // | |
69a313ec | 409 | if (fStack) |
410 | fStack->KeepTrack(itrack); | |
411 | else | |
5d12ce38 | 412 | gAlice->GetMCApp()->KeepTrack(itrack); |
69a313ec | 413 | |
414 | } | |
415 | ||
e2afb3b6 | 416 | //_______________________________________________________________________ |
69a313ec | 417 | void AliGenerator:: SetHighWaterMark(Int_t nt) |
418 | { | |
116cbefd | 419 | // |
420 | // Internal function to set the maximum index used in the stack | |
421 | // | |
69a313ec | 422 | if (fStack) |
423 | fStack->SetHighWaterMark(nt); | |
424 | else | |
5d12ce38 | 425 | gAlice->GetMCApp()->SetHighWaterMark(nt); |
69a313ec | 426 | |
427 | } | |
0b910a04 | 428 | void AliGenerator::FinishRun() |
429 | { | |
430 | ; | |
431 | } |