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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), |
76 | fTrackIt(0), | |
90e48c0c | 77 | fVertexGenerator(0), |
e2afb3b6 | 78 | fOrigin(3), |
79 | fOsigma(3), | |
80 | fVertex(3), | |
2c5b3727 | 81 | fStack(0), |
d6eec420 | 82 | fContainer(0), |
2c5b3727 | 83 | fCollisionGeometry(0) |
fe4da5cc | 84 | { |
aee8290b | 85 | // |
86 | // Default constructor | |
87 | // | |
f98e49f0 | 88 | if (gAlice) { |
594d8990 | 89 | AliDebug(1, "AliGenerator Default Constructor"); |
5d12ce38 | 90 | AliMC * mc = gAlice->GetMCApp(); |
91 | if (mc) mc->SetGenerator(this); | |
f98e49f0 | 92 | } |
93 | ||
de6d59e3 | 94 | SetThetaRange(); ResetBit(kThetaRange); |
95 | SetPhiRange(); ResetBit(kPhiRange); | |
96 | SetMomentumRange(); ResetBit(kMomentumRange); | |
97 | SetPtRange(); ResetBit(kPtRange); | |
98 | SetYRange(); ResetBit(kYRange); | |
fe4da5cc | 99 | SetNumberParticles(); |
4a3ba9d2 | 100 | SetTrackingFlag(); |
f98e49f0 | 101 | SetCutVertexZ(); |
102 | ||
de6d59e3 | 103 | |
fe4da5cc | 104 | fOrigin[0]=fOrigin[1]=fOrigin[2]=0; |
105 | fOsigma[0]=fOsigma[1]=fOsigma[2]=0; | |
f89cabfe | 106 | fVertex[0]=fVertex[1]=fVertex[2]=0; |
107 | ||
de6d59e3 | 108 | fVMin[0]=fVMin[1]=fVMin[2]=0; |
de6d59e3 | 109 | fVMax[0]=fVMax[1]=fVMax[2]=10000; |
fe4da5cc | 110 | } |
111 | ||
e2afb3b6 | 112 | //_______________________________________________________________________ |
113 | AliGenerator::AliGenerator(Int_t npart): | |
90e48c0c | 114 | TNamed(), |
115 | AliRndm(), | |
f559aa82 | 116 | fMCEvGen(0), |
e2afb3b6 | 117 | fThetaMin(0), |
118 | fThetaMax(0), | |
119 | fPhiMin(0), | |
120 | fPhiMax(0), | |
121 | fPMin(0), | |
122 | fPMax(0), | |
123 | fPtMin(0), | |
124 | fPtMax(0), | |
125 | fYMin(0), | |
126 | fYMax(0), | |
127 | fVMin(3), | |
128 | fVMax(3), | |
129 | fNpart(0), | |
130 | fParentWeight(0), | |
131 | fChildWeight(0), | |
132 | fAnalog(0), | |
133 | fVertexSmear(kNoSmear), | |
0b910a04 | 134 | fVertexSource(kInternal), |
e2afb3b6 | 135 | fCutVertexZ(0), |
136 | fTrackIt(0), | |
90e48c0c | 137 | fVertexGenerator(0), |
e2afb3b6 | 138 | fOrigin(3), |
139 | fOsigma(3), | |
140 | fVertex(3), | |
2c5b3727 | 141 | fStack(0), |
d6eec420 | 142 | fContainer(0), |
2c5b3727 | 143 | fCollisionGeometry(0) |
fe4da5cc | 144 | { |
aee8290b | 145 | // |
146 | // Standard constructor | |
147 | // | |
f98e49f0 | 148 | if (gAlice) { |
594d8990 | 149 | AliDebug(1, "AliGenerator Constructor initializing number of particles"); |
5d12ce38 | 150 | AliMC * mc = gAlice->GetMCApp(); |
151 | if (mc) mc->SetGenerator(this); | |
f98e49f0 | 152 | } |
153 | ||
de6d59e3 | 154 | SetThetaRange(); ResetBit(kThetaRange); |
155 | SetPhiRange(); ResetBit(kPhiRange); | |
156 | SetMomentumRange(); ResetBit(kMomentumRange); | |
157 | SetPtRange(); ResetBit(kPtRange); | |
158 | SetYRange(); ResetBit(kYRange); | |
4a3ba9d2 | 159 | SetTrackingFlag(); |
f98e49f0 | 160 | SetCutVertexZ(); |
de6d59e3 | 161 | |
fe4da5cc | 162 | fOrigin[0]=fOrigin[1]=fOrigin[2]=0; |
163 | fOsigma[0]=fOsigma[1]=fOsigma[2]=0; | |
f89cabfe | 164 | fVertex[0]=fVertex[1]=fVertex[2]=0; |
165 | ||
fe4da5cc | 166 | fVMin[0]=fVMin[1]=fVMin[2]=0; |
fe4da5cc | 167 | fVMax[0]=fVMax[1]=fVMax[2]=10000; |
de6d59e3 | 168 | |
169 | SetNumberParticles(npart); | |
9e1a0ddb | 170 | |
69a313ec | 171 | AliConfig::Instance()->Add(this); |
fe4da5cc | 172 | } |
173 | ||
e2afb3b6 | 174 | //_______________________________________________________________________ |
175 | AliGenerator::AliGenerator(const AliGenerator &gen): | |
176 | TNamed(gen), | |
177 | AliRndm(gen), | |
f559aa82 | 178 | fMCEvGen(0), |
e2afb3b6 | 179 | fThetaMin(0), |
180 | fThetaMax(0), | |
181 | fPhiMin(0), | |
182 | fPhiMax(0), | |
183 | fPMin(0), | |
184 | fPMax(0), | |
185 | fPtMin(0), | |
186 | fPtMax(0), | |
187 | fYMin(0), | |
188 | fYMax(0), | |
189 | fVMin(3), | |
190 | fVMax(3), | |
191 | fNpart(0), | |
192 | fParentWeight(0), | |
193 | fChildWeight(0), | |
194 | fAnalog(0), | |
195 | fVertexSmear(kNoSmear), | |
0b910a04 | 196 | fVertexSource(kInternal), |
e2afb3b6 | 197 | fCutVertexZ(0), |
198 | fTrackIt(0), | |
90e48c0c | 199 | fVertexGenerator(0), |
e2afb3b6 | 200 | fOrigin(3), |
201 | fOsigma(3), | |
202 | fVertex(3), | |
d6eec420 | 203 | fStack(0), |
90e48c0c | 204 | fContainer(0), |
205 | fCollisionGeometry(0) | |
aee8290b | 206 | { |
207 | // | |
208 | // Copy constructor | |
209 | // | |
210 | gen.Copy(*this); | |
211 | } | |
212 | ||
e2afb3b6 | 213 | //_______________________________________________________________________ |
aee8290b | 214 | AliGenerator & AliGenerator::operator=(const AliGenerator &gen) |
215 | { | |
216 | // | |
217 | // Assignment operator | |
218 | // | |
219 | gen.Copy(*this); | |
220 | return (*this); | |
221 | } | |
222 | ||
e2afb3b6 | 223 | //_______________________________________________________________________ |
6c4904c2 | 224 | void AliGenerator::Copy(TObject &/* gen */) const |
aee8290b | 225 | { |
226 | // | |
227 | // Copy *this onto gen | |
228 | // | |
594d8990 | 229 | AliFatal("Not implemented!"); |
aee8290b | 230 | } |
231 | ||
e2afb3b6 | 232 | //_______________________________________________________________________ |
fe4da5cc | 233 | AliGenerator::~AliGenerator() |
234 | { | |
aee8290b | 235 | // |
236 | // Destructor | |
237 | // | |
fe4da5cc | 238 | fOrigin.Set(0); |
239 | fOsigma.Set(0); | |
a08cd31a | 240 | if (fMCEvGen) { |
241 | delete fMCEvGen; | |
242 | fMCEvGen=0; | |
475e6235 | 243 | } |
fe4da5cc | 244 | } |
245 | ||
e2afb3b6 | 246 | //_______________________________________________________________________ |
fe4da5cc | 247 | void AliGenerator::Init() |
248 | { | |
aee8290b | 249 | // |
250 | // Dummy initialisation | |
251 | // | |
fe4da5cc | 252 | } |
253 | ||
94de3818 | 254 | //_______________________________________________________________________ |
255 | void AliGenerator::SetOrigin(Float_t ox, Float_t oy, Float_t oz) | |
256 | { | |
257 | // | |
258 | // Set the vertex for the generated tracks | |
259 | // | |
260 | fOrigin[0]=ox; | |
261 | fOrigin[1]=oy; | |
262 | fOrigin[2]=oz; | |
263 | } | |
264 | ||
265 | //_______________________________________________________________________ | |
266 | void AliGenerator::SetOrigin(const TLorentzVector &o) | |
267 | { | |
268 | // | |
269 | // Set the vertex for the generated tracks | |
270 | // | |
271 | fOrigin[0]=o[0]; | |
272 | fOrigin[1]=o[1]; | |
273 | fOrigin[2]=o[2]; | |
274 | } | |
275 | ||
276 | //_______________________________________________________________________ | |
277 | void AliGenerator::SetSigma(Float_t sx, Float_t sy, Float_t sz) | |
278 | { | |
279 | // | |
280 | // Set the spread of the vertex | |
281 | // | |
282 | fOsigma[0]=sx; | |
283 | fOsigma[1]=sy; | |
284 | fOsigma[2]=sz; | |
285 | } | |
286 | ||
287 | //_______________________________________________________________________ | |
288 | void AliGenerator::SetMomentumRange(Float_t pmin, Float_t pmax) | |
289 | { | |
290 | // | |
291 | // Set the momentum range for the generated particles | |
292 | // | |
293 | fPMin = pmin; | |
294 | fPMax = pmax; | |
295 | SetBit(kMomentumRange); | |
296 | } | |
297 | ||
298 | //_______________________________________________________________________ | |
299 | void AliGenerator::SetPtRange(Float_t ptmin, Float_t ptmax) | |
300 | { | |
301 | // | |
302 | // Set the Pt range for the generated particles | |
303 | // | |
304 | fPtMin = ptmin; | |
305 | fPtMax = ptmax; | |
306 | SetBit(kPtRange); | |
307 | } | |
308 | ||
309 | //_______________________________________________________________________ | |
310 | void AliGenerator::SetPhiRange(Float_t phimin, Float_t phimax) | |
311 | { | |
312 | // | |
313 | // Set the Phi range for the generated particles | |
314 | // | |
315 | fPhiMin = TMath::Pi()*phimin/180; | |
c34578e7 | 316 | fPhiMax = TMath::Pi()*phimax/180; |
317 | SetBit(kPhiRange); | |
94de3818 | 318 | } |
319 | ||
320 | //_______________________________________________________________________ | |
ca3a341c | 321 | void AliGenerator::SetYRange(Float_t ymin, Float_t ymax) |
94de3818 | 322 | { |
323 | // | |
324 | // Set the Rapidity range for the generated particles | |
325 | // | |
326 | fYMin=ymin; | |
327 | fYMax=ymax; | |
328 | SetBit(kYRange); | |
329 | } | |
330 | ||
331 | //_______________________________________________________________________ | |
332 | void AliGenerator::SetVRange(Float_t vxmin, Float_t vxmax, | |
333 | Float_t vymin, Float_t vymax, | |
334 | Float_t vzmin, Float_t vzmax) | |
335 | { | |
336 | // | |
337 | // Set the vertex range for the generated particles | |
338 | // | |
339 | fVMin[0]=vxmin; fVMin[1]=vymin; fVMin[2]=vzmin; | |
340 | fVMax[0]=vxmax; fVMax[1]=vymax; fVMax[2]=vzmax; | |
341 | SetBit(kVertexRange); | |
342 | } | |
fe4da5cc | 343 | |
94de3818 | 344 | //_______________________________________________________________________ |
345 | void AliGenerator::SetThetaRange(Float_t thetamin, Float_t thetamax) | |
346 | { | |
347 | // | |
348 | // Set the theta range for the generated particles | |
349 | // | |
350 | fThetaMin = TMath::Pi()*thetamin/180; | |
c34578e7 | 351 | fThetaMax = TMath::Pi()*thetamax/180; |
352 | SetBit(kThetaRange); | |
94de3818 | 353 | } |
f89cabfe | 354 | |
355 | void AliGenerator::Vertex() | |
356 | { | |
357 | // | |
358 | // Obtain vertex for current event from external source or calculated (internal) | |
359 | // | |
360 | if (fVertexSource == kInternal) { | |
361 | VertexInternal(); | |
0b910a04 | 362 | } else if (fVertexSource == kContainer) { |
363 | ; | |
364 | } else if (fVertexSource == kExternal) { | |
f89cabfe | 365 | VertexExternal(); |
366 | } | |
367 | } | |
368 | ||
e2afb3b6 | 369 | //_______________________________________________________________________ |
f89cabfe | 370 | void AliGenerator::VertexExternal() |
371 | { | |
f89cabfe | 372 | // |
14248849 | 373 | // Obtain vertex from external source (vertex generator) |
374 | // | |
375 | TVector3 vertex = fVertexGenerator->GetVertex(); | |
376 | fVertex[0] = vertex.X(); | |
377 | fVertex[1] = vertex.Y(); | |
378 | fVertex[2] = vertex.Z(); | |
f89cabfe | 379 | } |
380 | ||
e2afb3b6 | 381 | //_______________________________________________________________________ |
f89cabfe | 382 | void AliGenerator::VertexInternal() |
383 | { | |
384 | // | |
385 | // Obtain calculated vertex | |
386 | // Default is gaussian smearing | |
387 | Float_t random[6]; | |
0b910a04 | 388 | Float_t dv[3]; |
389 | Int_t j; | |
0b910a04 | 390 | dv[2] = 1.e10; |
c1f70070 | 391 | if (!TestBit(kVertexRange)) { |
392 | while(TMath::Abs(dv[2]) > fCutVertexZ*fOsigma[2]) { | |
393 | Rndm(random,6); | |
394 | for (j=0; j < 3; j++) { | |
395 | dv[j] = fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
396 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
397 | } | |
0b910a04 | 398 | } |
c1f70070 | 399 | for (j=0; j < 3; j++) fVertex[j] = fOrigin[j] + dv[j]; |
400 | } else { | |
401 | Rndm(random,3); | |
402 | for (j=0; j < 3; j++) | |
403 | fVertex[j] = fVMin[j] + random[j] * (fVMax[j] - fVMin[j]); | |
f89cabfe | 404 | } |
405 | } | |
406 | ||
e2afb3b6 | 407 | //_______________________________________________________________________ |
642f15cf | 408 | void AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg, |
69a313ec | 409 | Float_t *pmom, Float_t *vpos, Float_t *polar, |
98490ea9 | 410 | Float_t tof, TMCProcess mech, Int_t &ntr, |
47c8bcbe | 411 | Float_t weight, Int_t is) |
69a313ec | 412 | { |
116cbefd | 413 | // |
414 | // Loads one track on the stack | |
415 | // | |
69a313ec | 416 | |
417 | if (fStack) | |
642f15cf | 418 | fStack->PushTrack(done, parent, pdg, pmom, vpos, polar, tof, |
47c8bcbe | 419 | mech, ntr, weight, is); |
69a313ec | 420 | else |
5d12ce38 | 421 | gAlice->GetMCApp()->PushTrack(done, parent, pdg, pmom, vpos, polar, tof, |
47c8bcbe | 422 | mech, ntr, weight, is); |
69a313ec | 423 | } |
e2afb3b6 | 424 | |
425 | //_______________________________________________________________________ | |
642f15cf | 426 | void AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg, |
69a313ec | 427 | Double_t px, Double_t py, Double_t pz, Double_t e, |
428 | Double_t vx, Double_t vy, Double_t vz, Double_t tof, | |
429 | Double_t polx, Double_t poly, Double_t polz, | |
98490ea9 | 430 | TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is) |
69a313ec | 431 | { |
116cbefd | 432 | // |
433 | // Loads one track on the stack | |
434 | // | |
69a313ec | 435 | |
436 | if (fStack) | |
642f15cf | 437 | fStack->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof, |
47c8bcbe | 438 | polx, poly, polz, mech, ntr, weight, is); |
69a313ec | 439 | else |
5d12ce38 | 440 | gAlice->GetMCApp()->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof, |
47c8bcbe | 441 | polx, poly, polz, mech, ntr, weight, is); |
69a313ec | 442 | } |
f89cabfe | 443 | |
69a313ec | 444 | |
e2afb3b6 | 445 | //_______________________________________________________________________ |
69a313ec | 446 | void AliGenerator:: KeepTrack(Int_t itrack) |
447 | { | |
116cbefd | 448 | // |
449 | // Declare a track permanent on the stack | |
450 | // | |
69a313ec | 451 | if (fStack) |
452 | fStack->KeepTrack(itrack); | |
453 | else | |
5d12ce38 | 454 | gAlice->GetMCApp()->KeepTrack(itrack); |
69a313ec | 455 | |
456 | } | |
457 | ||
e2afb3b6 | 458 | //_______________________________________________________________________ |
69a313ec | 459 | void AliGenerator:: SetHighWaterMark(Int_t nt) |
460 | { | |
116cbefd | 461 | // |
462 | // Internal function to set the maximum index used in the stack | |
463 | // | |
69a313ec | 464 | if (fStack) |
465 | fStack->SetHighWaterMark(nt); | |
466 | else | |
5d12ce38 | 467 | gAlice->GetMCApp()->SetHighWaterMark(nt); |
69a313ec | 468 | |
469 | } | |
0b910a04 | 470 | void AliGenerator::FinishRun() |
471 | { | |
472 | ; | |
473 | } |