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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), | |
21391258 | 82 | fTimeOrigin(0.), |
83 | fTime(0.), | |
2c5b3727 | 84 | fStack(0), |
d6eec420 | 85 | fContainer(0), |
e7c989e4 | 86 | fCollisionGeometry(0), |
87 | fEnergyCMS(0), | |
88 | fAProjectile(0), | |
89 | fZProjectile(0), | |
90 | fATarget(0), | |
91 | fZTarget(0), | |
92 | fProjectile(""), | |
93 | fTarget("") | |
fe4da5cc | 94 | { |
aee8290b | 95 | // |
96 | // Default constructor | |
97 | // | |
f98e49f0 | 98 | if (gAlice) { |
594d8990 | 99 | AliDebug(1, "AliGenerator Default Constructor"); |
5d12ce38 | 100 | AliMC * mc = gAlice->GetMCApp(); |
101 | if (mc) mc->SetGenerator(this); | |
f98e49f0 | 102 | } |
103 | ||
de6d59e3 | 104 | SetThetaRange(); ResetBit(kThetaRange); |
105 | SetPhiRange(); ResetBit(kPhiRange); | |
106 | SetMomentumRange(); ResetBit(kMomentumRange); | |
107 | SetPtRange(); ResetBit(kPtRange); | |
108 | SetYRange(); ResetBit(kYRange); | |
fe4da5cc | 109 | SetNumberParticles(); |
4a3ba9d2 | 110 | SetTrackingFlag(); |
f98e49f0 | 111 | SetCutVertexZ(); |
112 | ||
de6d59e3 | 113 | |
fe4da5cc | 114 | fOrigin[0]=fOrigin[1]=fOrigin[2]=0; |
115 | fOsigma[0]=fOsigma[1]=fOsigma[2]=0; | |
f89cabfe | 116 | fVertex[0]=fVertex[1]=fVertex[2]=0; |
117 | ||
de6d59e3 | 118 | fVMin[0]=fVMin[1]=fVMin[2]=0; |
de6d59e3 | 119 | fVMax[0]=fVMax[1]=fVMax[2]=10000; |
fe4da5cc | 120 | } |
121 | ||
e2afb3b6 | 122 | //_______________________________________________________________________ |
123 | AliGenerator::AliGenerator(Int_t npart): | |
90e48c0c | 124 | TNamed(), |
125 | AliRndm(), | |
f559aa82 | 126 | fMCEvGen(0), |
e2afb3b6 | 127 | fThetaMin(0), |
128 | fThetaMax(0), | |
129 | fPhiMin(0), | |
130 | fPhiMax(0), | |
131 | fPMin(0), | |
132 | fPMax(0), | |
133 | fPtMin(0), | |
134 | fPtMax(0), | |
135 | fYMin(0), | |
136 | fYMax(0), | |
137 | fVMin(3), | |
138 | fVMax(3), | |
139 | fNpart(0), | |
140 | fParentWeight(0), | |
141 | fChildWeight(0), | |
142 | fAnalog(0), | |
143 | fVertexSmear(kNoSmear), | |
0b910a04 | 144 | fVertexSource(kInternal), |
e2afb3b6 | 145 | fCutVertexZ(0), |
f0831961 | 146 | fPileUpTimeWindow(-1.), |
e2afb3b6 | 147 | fTrackIt(0), |
90e48c0c | 148 | fVertexGenerator(0), |
e2afb3b6 | 149 | fOrigin(3), |
150 | fOsigma(3), | |
151 | fVertex(3), | |
21391258 | 152 | fTimeOrigin(0.), |
153 | fTime(0.), | |
2c5b3727 | 154 | fStack(0), |
d6eec420 | 155 | fContainer(0), |
e7c989e4 | 156 | fCollisionGeometry(0), |
157 | fEnergyCMS(0), | |
158 | fAProjectile(0), | |
159 | fZProjectile(0), | |
160 | fATarget(0), | |
161 | fZTarget(0), | |
162 | fProjectile(""), | |
163 | fTarget("") | |
fe4da5cc | 164 | { |
aee8290b | 165 | // |
166 | // Standard constructor | |
167 | // | |
f98e49f0 | 168 | if (gAlice) { |
594d8990 | 169 | AliDebug(1, "AliGenerator Constructor initializing number of particles"); |
5d12ce38 | 170 | AliMC * mc = gAlice->GetMCApp(); |
171 | if (mc) mc->SetGenerator(this); | |
f98e49f0 | 172 | } |
173 | ||
de6d59e3 | 174 | SetThetaRange(); ResetBit(kThetaRange); |
175 | SetPhiRange(); ResetBit(kPhiRange); | |
176 | SetMomentumRange(); ResetBit(kMomentumRange); | |
177 | SetPtRange(); ResetBit(kPtRange); | |
178 | SetYRange(); ResetBit(kYRange); | |
4a3ba9d2 | 179 | SetTrackingFlag(); |
f98e49f0 | 180 | SetCutVertexZ(); |
de6d59e3 | 181 | |
fe4da5cc | 182 | fOrigin[0]=fOrigin[1]=fOrigin[2]=0; |
183 | fOsigma[0]=fOsigma[1]=fOsigma[2]=0; | |
f89cabfe | 184 | fVertex[0]=fVertex[1]=fVertex[2]=0; |
185 | ||
fe4da5cc | 186 | fVMin[0]=fVMin[1]=fVMin[2]=0; |
fe4da5cc | 187 | fVMax[0]=fVMax[1]=fVMax[2]=10000; |
de6d59e3 | 188 | |
189 | SetNumberParticles(npart); | |
9e1a0ddb | 190 | |
69a313ec | 191 | AliConfig::Instance()->Add(this); |
fe4da5cc | 192 | } |
193 | ||
e2afb3b6 | 194 | //_______________________________________________________________________ |
fe4da5cc | 195 | AliGenerator::~AliGenerator() |
196 | { | |
aee8290b | 197 | // |
198 | // Destructor | |
199 | // | |
fe4da5cc | 200 | fOrigin.Set(0); |
201 | fOsigma.Set(0); | |
a08cd31a | 202 | if (fMCEvGen) { |
203 | delete fMCEvGen; | |
204 | fMCEvGen=0; | |
475e6235 | 205 | } |
fe4da5cc | 206 | } |
207 | ||
e2afb3b6 | 208 | //_______________________________________________________________________ |
fe4da5cc | 209 | void AliGenerator::Init() |
210 | { | |
aee8290b | 211 | // |
212 | // Dummy initialisation | |
213 | // | |
fe4da5cc | 214 | } |
215 | ||
94de3818 | 216 | //_______________________________________________________________________ |
217 | void AliGenerator::SetOrigin(Float_t ox, Float_t oy, Float_t oz) | |
218 | { | |
219 | // | |
220 | // Set the vertex for the generated tracks | |
221 | // | |
222 | fOrigin[0]=ox; | |
223 | fOrigin[1]=oy; | |
224 | fOrigin[2]=oz; | |
225 | } | |
226 | ||
227 | //_______________________________________________________________________ | |
228 | void AliGenerator::SetOrigin(const TLorentzVector &o) | |
229 | { | |
230 | // | |
231 | // Set the vertex for the generated tracks | |
232 | // | |
233 | fOrigin[0]=o[0]; | |
234 | fOrigin[1]=o[1]; | |
235 | fOrigin[2]=o[2]; | |
236 | } | |
237 | ||
238 | //_______________________________________________________________________ | |
239 | void AliGenerator::SetSigma(Float_t sx, Float_t sy, Float_t sz) | |
240 | { | |
241 | // | |
242 | // Set the spread of the vertex | |
243 | // | |
244 | fOsigma[0]=sx; | |
245 | fOsigma[1]=sy; | |
246 | fOsigma[2]=sz; | |
247 | } | |
248 | ||
249 | //_______________________________________________________________________ | |
250 | void AliGenerator::SetMomentumRange(Float_t pmin, Float_t pmax) | |
251 | { | |
252 | // | |
253 | // Set the momentum range for the generated particles | |
254 | // | |
255 | fPMin = pmin; | |
256 | fPMax = pmax; | |
257 | SetBit(kMomentumRange); | |
258 | } | |
259 | ||
260 | //_______________________________________________________________________ | |
261 | void AliGenerator::SetPtRange(Float_t ptmin, Float_t ptmax) | |
262 | { | |
263 | // | |
264 | // Set the Pt range for the generated particles | |
265 | // | |
266 | fPtMin = ptmin; | |
267 | fPtMax = ptmax; | |
268 | SetBit(kPtRange); | |
269 | } | |
270 | ||
271 | //_______________________________________________________________________ | |
272 | void AliGenerator::SetPhiRange(Float_t phimin, Float_t phimax) | |
273 | { | |
274 | // | |
275 | // Set the Phi range for the generated particles | |
276 | // | |
277 | fPhiMin = TMath::Pi()*phimin/180; | |
c34578e7 | 278 | fPhiMax = TMath::Pi()*phimax/180; |
279 | SetBit(kPhiRange); | |
94de3818 | 280 | } |
281 | ||
282 | //_______________________________________________________________________ | |
ca3a341c | 283 | void AliGenerator::SetYRange(Float_t ymin, Float_t ymax) |
94de3818 | 284 | { |
285 | // | |
286 | // Set the Rapidity range for the generated particles | |
287 | // | |
288 | fYMin=ymin; | |
289 | fYMax=ymax; | |
290 | SetBit(kYRange); | |
291 | } | |
292 | ||
293 | //_______________________________________________________________________ | |
294 | void AliGenerator::SetVRange(Float_t vxmin, Float_t vxmax, | |
295 | Float_t vymin, Float_t vymax, | |
296 | Float_t vzmin, Float_t vzmax) | |
297 | { | |
298 | // | |
299 | // Set the vertex range for the generated particles | |
300 | // | |
301 | fVMin[0]=vxmin; fVMin[1]=vymin; fVMin[2]=vzmin; | |
302 | fVMax[0]=vxmax; fVMax[1]=vymax; fVMax[2]=vzmax; | |
303 | SetBit(kVertexRange); | |
304 | } | |
fe4da5cc | 305 | |
94de3818 | 306 | //_______________________________________________________________________ |
307 | void AliGenerator::SetThetaRange(Float_t thetamin, Float_t thetamax) | |
308 | { | |
309 | // | |
310 | // Set the theta range for the generated particles | |
311 | // | |
312 | fThetaMin = TMath::Pi()*thetamin/180; | |
c34578e7 | 313 | fThetaMax = TMath::Pi()*thetamax/180; |
314 | SetBit(kThetaRange); | |
94de3818 | 315 | } |
f89cabfe | 316 | |
317 | void AliGenerator::Vertex() | |
318 | { | |
319 | // | |
320 | // Obtain vertex for current event from external source or calculated (internal) | |
321 | // | |
322 | if (fVertexSource == kInternal) { | |
323 | VertexInternal(); | |
0b910a04 | 324 | } else if (fVertexSource == kContainer) { |
325 | ; | |
326 | } else if (fVertexSource == kExternal) { | |
f89cabfe | 327 | VertexExternal(); |
328 | } | |
329 | } | |
330 | ||
e2afb3b6 | 331 | //_______________________________________________________________________ |
f89cabfe | 332 | void AliGenerator::VertexExternal() |
333 | { | |
f89cabfe | 334 | // |
14248849 | 335 | // Obtain vertex from external source (vertex generator) |
336 | // | |
337 | TVector3 vertex = fVertexGenerator->GetVertex(); | |
338 | fVertex[0] = vertex.X(); | |
339 | fVertex[1] = vertex.Y(); | |
340 | fVertex[2] = vertex.Z(); | |
21391258 | 341 | fTime = 0.; |
f89cabfe | 342 | } |
343 | ||
e2afb3b6 | 344 | //_______________________________________________________________________ |
f89cabfe | 345 | void AliGenerator::VertexInternal() |
346 | { | |
347 | // | |
348 | // Obtain calculated vertex | |
349 | // Default is gaussian smearing | |
350 | Float_t random[6]; | |
0b910a04 | 351 | Float_t dv[3]; |
352 | Int_t j; | |
0b910a04 | 353 | dv[2] = 1.e10; |
c1f70070 | 354 | if (!TestBit(kVertexRange)) { |
355 | while(TMath::Abs(dv[2]) > fCutVertexZ*fOsigma[2]) { | |
356 | Rndm(random,6); | |
357 | for (j=0; j < 3; j++) { | |
358 | dv[j] = fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
359 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
360 | } | |
0b910a04 | 361 | } |
c1f70070 | 362 | for (j=0; j < 3; j++) fVertex[j] = fOrigin[j] + dv[j]; |
21391258 | 363 | |
364 | // In case of gaussian smearing we smear also the event/collision time | |
365 | Rndm(random,2); | |
366 | fTime = fTimeOrigin + fOsigma[2]/TMath::Ccgs()* | |
367 | TMath::Cos(2*random[0]*TMath::Pi())* | |
368 | TMath::Sqrt(-2*TMath::Log(random[1])); | |
369 | ||
c1f70070 | 370 | } else { |
371 | Rndm(random,3); | |
372 | for (j=0; j < 3; j++) | |
373 | fVertex[j] = fVMin[j] + random[j] * (fVMax[j] - fVMin[j]); | |
21391258 | 374 | fTime = 0.; |
f89cabfe | 375 | } |
376 | } | |
377 | ||
e2afb3b6 | 378 | //_______________________________________________________________________ |
642f15cf | 379 | void AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg, |
69a313ec | 380 | Float_t *pmom, Float_t *vpos, Float_t *polar, |
98490ea9 | 381 | Float_t tof, TMCProcess mech, Int_t &ntr, |
47c8bcbe | 382 | Float_t weight, Int_t is) |
69a313ec | 383 | { |
116cbefd | 384 | // |
385 | // Loads one track on the stack | |
386 | // | |
f0831961 | 387 | |
69a313ec | 388 | if (fStack) |
642f15cf | 389 | fStack->PushTrack(done, parent, pdg, pmom, vpos, polar, tof, |
47c8bcbe | 390 | mech, ntr, weight, is); |
69a313ec | 391 | else |
5d12ce38 | 392 | gAlice->GetMCApp()->PushTrack(done, parent, pdg, pmom, vpos, polar, tof, |
47c8bcbe | 393 | mech, ntr, weight, is); |
69a313ec | 394 | } |
e2afb3b6 | 395 | |
396 | //_______________________________________________________________________ | |
642f15cf | 397 | void AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg, |
69a313ec | 398 | Double_t px, Double_t py, Double_t pz, Double_t e, |
399 | Double_t vx, Double_t vy, Double_t vz, Double_t tof, | |
400 | Double_t polx, Double_t poly, Double_t polz, | |
98490ea9 | 401 | TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is) |
69a313ec | 402 | { |
116cbefd | 403 | // |
404 | // Loads one track on the stack | |
405 | // | |
69a313ec | 406 | |
407 | if (fStack) | |
642f15cf | 408 | fStack->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof, |
47c8bcbe | 409 | polx, poly, polz, mech, ntr, weight, is); |
69a313ec | 410 | else |
5d12ce38 | 411 | gAlice->GetMCApp()->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof, |
47c8bcbe | 412 | polx, poly, polz, mech, ntr, weight, is); |
69a313ec | 413 | } |
f89cabfe | 414 | |
69a313ec | 415 | |
e2afb3b6 | 416 | //_______________________________________________________________________ |
69a313ec | 417 | void AliGenerator:: KeepTrack(Int_t itrack) |
418 | { | |
116cbefd | 419 | // |
420 | // Declare a track permanent on the stack | |
421 | // | |
69a313ec | 422 | if (fStack) |
423 | fStack->KeepTrack(itrack); | |
424 | else | |
5d12ce38 | 425 | gAlice->GetMCApp()->KeepTrack(itrack); |
69a313ec | 426 | |
427 | } | |
428 | ||
e2afb3b6 | 429 | //_______________________________________________________________________ |
69a313ec | 430 | void AliGenerator:: SetHighWaterMark(Int_t nt) |
431 | { | |
116cbefd | 432 | // |
433 | // Internal function to set the maximum index used in the stack | |
434 | // | |
69a313ec | 435 | if (fStack) |
436 | fStack->SetHighWaterMark(nt); | |
437 | else | |
5d12ce38 | 438 | gAlice->GetMCApp()->SetHighWaterMark(nt); |
69a313ec | 439 | |
440 | } | |
0b910a04 | 441 | void AliGenerator::FinishRun() |
442 | { | |
443 | ; | |
444 | } |