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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 | /* $Id$ */ | |
17 | ||
18 | //----------------------------------------------------------------- | |
19 | // Generate the final state of the interaction as the input | |
20 | // to the MonteCarlo | |
21 | // Author: A.Morsch | |
22 | //----------------------------------------------------------------- | |
23 | //Begin_Html | |
24 | /* | |
25 | <img src="picts/AliGeneratorClass.gif"> | |
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 | /////////////////////////////////////////////////////////////////// | |
37 | #include <TGenerator.h> | |
38 | #include <TMCProcess.h> | |
39 | ||
40 | #include "AliLog.h" | |
41 | #include "AliCollisionGeometry.h" | |
42 | #include "AliConfig.h" | |
43 | #include "AliGenerator.h" | |
44 | #include "AliRun.h" | |
45 | #include "AliStack.h" | |
46 | #include "AliMC.h" | |
47 | #include "AliVertexGenerator.h" | |
48 | ||
49 | ClassImp(AliGenerator) | |
50 | ||
51 | ||
52 | //_______________________________________________________________________ | |
53 | AliGenerator::AliGenerator(): | |
54 | TNamed(), | |
55 | AliRndm(), | |
56 | fMCEvGen(0), | |
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), | |
74 | fVertexSource(kInternal), | |
75 | fCutVertexZ(0), | |
76 | fPileUpTimeWindow(-1.), | |
77 | fTrackIt(0), | |
78 | fVertexGenerator(0), | |
79 | fOrigin(3), | |
80 | fOsigma(3), | |
81 | fVertex(3), | |
82 | fStack(0), | |
83 | fContainer(0), | |
84 | fCollisionGeometry(0), | |
85 | fEnergyCMS(0), | |
86 | fAProjectile(0), | |
87 | fZProjectile(0), | |
88 | fATarget(0), | |
89 | fZTarget(0), | |
90 | fProjectile(""), | |
91 | fTarget("") | |
92 | { | |
93 | // | |
94 | // Default constructor | |
95 | // | |
96 | if (gAlice) { | |
97 | AliDebug(1, "AliGenerator Default Constructor"); | |
98 | AliMC * mc = gAlice->GetMCApp(); | |
99 | if (mc) mc->SetGenerator(this); | |
100 | } | |
101 | ||
102 | SetThetaRange(); ResetBit(kThetaRange); | |
103 | SetPhiRange(); ResetBit(kPhiRange); | |
104 | SetMomentumRange(); ResetBit(kMomentumRange); | |
105 | SetPtRange(); ResetBit(kPtRange); | |
106 | SetYRange(); ResetBit(kYRange); | |
107 | SetNumberParticles(); | |
108 | SetTrackingFlag(); | |
109 | SetCutVertexZ(); | |
110 | ||
111 | ||
112 | fOrigin[0]=fOrigin[1]=fOrigin[2]=0; | |
113 | fOsigma[0]=fOsigma[1]=fOsigma[2]=0; | |
114 | fVertex[0]=fVertex[1]=fVertex[2]=0; | |
115 | ||
116 | fVMin[0]=fVMin[1]=fVMin[2]=0; | |
117 | fVMax[0]=fVMax[1]=fVMax[2]=10000; | |
118 | } | |
119 | ||
120 | //_______________________________________________________________________ | |
121 | AliGenerator::AliGenerator(Int_t npart): | |
122 | TNamed(), | |
123 | AliRndm(), | |
124 | fMCEvGen(0), | |
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), | |
142 | fVertexSource(kInternal), | |
143 | fCutVertexZ(0), | |
144 | fPileUpTimeWindow(-1.), | |
145 | fTrackIt(0), | |
146 | fVertexGenerator(0), | |
147 | fOrigin(3), | |
148 | fOsigma(3), | |
149 | fVertex(3), | |
150 | fStack(0), | |
151 | fContainer(0), | |
152 | fCollisionGeometry(0), | |
153 | fEnergyCMS(0), | |
154 | fAProjectile(0), | |
155 | fZProjectile(0), | |
156 | fATarget(0), | |
157 | fZTarget(0), | |
158 | fProjectile(""), | |
159 | fTarget("") | |
160 | { | |
161 | // | |
162 | // Standard constructor | |
163 | // | |
164 | if (gAlice) { | |
165 | AliDebug(1, "AliGenerator Constructor initializing number of particles"); | |
166 | AliMC * mc = gAlice->GetMCApp(); | |
167 | if (mc) mc->SetGenerator(this); | |
168 | } | |
169 | ||
170 | SetThetaRange(); ResetBit(kThetaRange); | |
171 | SetPhiRange(); ResetBit(kPhiRange); | |
172 | SetMomentumRange(); ResetBit(kMomentumRange); | |
173 | SetPtRange(); ResetBit(kPtRange); | |
174 | SetYRange(); ResetBit(kYRange); | |
175 | SetTrackingFlag(); | |
176 | SetCutVertexZ(); | |
177 | ||
178 | fOrigin[0]=fOrigin[1]=fOrigin[2]=0; | |
179 | fOsigma[0]=fOsigma[1]=fOsigma[2]=0; | |
180 | fVertex[0]=fVertex[1]=fVertex[2]=0; | |
181 | ||
182 | fVMin[0]=fVMin[1]=fVMin[2]=0; | |
183 | fVMax[0]=fVMax[1]=fVMax[2]=10000; | |
184 | ||
185 | SetNumberParticles(npart); | |
186 | ||
187 | AliConfig::Instance()->Add(this); | |
188 | } | |
189 | ||
190 | //_______________________________________________________________________ | |
191 | AliGenerator::~AliGenerator() | |
192 | { | |
193 | // | |
194 | // Destructor | |
195 | // | |
196 | fOrigin.Set(0); | |
197 | fOsigma.Set(0); | |
198 | if (fMCEvGen) { | |
199 | delete fMCEvGen; | |
200 | fMCEvGen=0; | |
201 | } | |
202 | } | |
203 | ||
204 | //_______________________________________________________________________ | |
205 | void AliGenerator::Init() | |
206 | { | |
207 | // | |
208 | // Dummy initialisation | |
209 | // | |
210 | } | |
211 | ||
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; | |
274 | fPhiMax = TMath::Pi()*phimax/180; | |
275 | SetBit(kPhiRange); | |
276 | } | |
277 | ||
278 | //_______________________________________________________________________ | |
279 | void AliGenerator::SetYRange(Float_t ymin, Float_t ymax) | |
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 | } | |
301 | ||
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; | |
309 | fThetaMax = TMath::Pi()*thetamax/180; | |
310 | SetBit(kThetaRange); | |
311 | } | |
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(); | |
320 | } else if (fVertexSource == kContainer) { | |
321 | ; | |
322 | } else if (fVertexSource == kExternal) { | |
323 | VertexExternal(); | |
324 | } | |
325 | } | |
326 | ||
327 | //_______________________________________________________________________ | |
328 | void AliGenerator::VertexExternal() | |
329 | { | |
330 | // | |
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(); | |
337 | } | |
338 | ||
339 | //_______________________________________________________________________ | |
340 | void AliGenerator::VertexInternal() | |
341 | { | |
342 | // | |
343 | // Obtain calculated vertex | |
344 | // Default is gaussian smearing | |
345 | Float_t random[6]; | |
346 | Float_t dv[3]; | |
347 | Int_t j; | |
348 | dv[2] = 1.e10; | |
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 | } | |
356 | } | |
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]); | |
362 | } | |
363 | } | |
364 | ||
365 | //_______________________________________________________________________ | |
366 | void AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg, | |
367 | Float_t *pmom, Float_t *vpos, Float_t *polar, | |
368 | Float_t tof, TMCProcess mech, Int_t &ntr, | |
369 | Float_t weight, Int_t is) | |
370 | { | |
371 | // | |
372 | // Loads one track on the stack | |
373 | // | |
374 | ||
375 | if (fStack) | |
376 | fStack->PushTrack(done, parent, pdg, pmom, vpos, polar, tof, | |
377 | mech, ntr, weight, is); | |
378 | else | |
379 | gAlice->GetMCApp()->PushTrack(done, parent, pdg, pmom, vpos, polar, tof, | |
380 | mech, ntr, weight, is); | |
381 | } | |
382 | ||
383 | //_______________________________________________________________________ | |
384 | void AliGenerator::PushTrack(Int_t done, Int_t parent, Int_t pdg, | |
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, | |
388 | TMCProcess mech, Int_t &ntr, Float_t weight, Int_t is) | |
389 | { | |
390 | // | |
391 | // Loads one track on the stack | |
392 | // | |
393 | ||
394 | if (fStack) | |
395 | fStack->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof, | |
396 | polx, poly, polz, mech, ntr, weight, is); | |
397 | else | |
398 | gAlice->GetMCApp()->PushTrack(done, parent, pdg, px, py, pz, e, vx, vy, vz, tof, | |
399 | polx, poly, polz, mech, ntr, weight, is); | |
400 | } | |
401 | ||
402 | ||
403 | //_______________________________________________________________________ | |
404 | void AliGenerator:: KeepTrack(Int_t itrack) | |
405 | { | |
406 | // | |
407 | // Declare a track permanent on the stack | |
408 | // | |
409 | if (fStack) | |
410 | fStack->KeepTrack(itrack); | |
411 | else | |
412 | gAlice->GetMCApp()->KeepTrack(itrack); | |
413 | ||
414 | } | |
415 | ||
416 | //_______________________________________________________________________ | |
417 | void AliGenerator:: SetHighWaterMark(Int_t nt) | |
418 | { | |
419 | // | |
420 | // Internal function to set the maximum index used in the stack | |
421 | // | |
422 | if (fStack) | |
423 | fStack->SetHighWaterMark(nt); | |
424 | else | |
425 | gAlice->GetMCApp()->SetHighWaterMark(nt); | |
426 | ||
427 | } | |
428 | void AliGenerator::FinishRun() | |
429 | { | |
430 | ; | |
431 | } |