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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 | ||
88cb7938 | 16 | /* $Id$ */ |
4c039060 | 17 | |
675e9664 | 18 | // Container class for AliGenerator through recursion. |
19 | // Container is itself an AliGenerator. | |
20 | // What is stored are not the pointers to the generators directly but to objects of type | |
21 | // AliGenCocktail entry. | |
22 | // The class provides also iterator functionality. | |
23 | // Author: andreas.morsch@cern.ch | |
24 | // | |
25 | ||
116cbefd | 26 | #include <TList.h> |
27 | #include <TObjArray.h> | |
7c54213e | 28 | #include <TFormula.h> |
116cbefd | 29 | |
fe4da5cc | 30 | #include "AliGenCocktail.h" |
374924b5 | 31 | #include "AliGenCocktailEntry.h" |
09e2e187 | 32 | #include "AliCollisionGeometry.h" |
fe4da5cc | 33 | #include "AliRun.h" |
7c54213e | 34 | #include "AliLog.h" |
5d12ce38 | 35 | #include "AliMC.h" |
4f85aa78 | 36 | #include "AliGenCocktailEventHeader.h" |
fe4da5cc | 37 | |
38 | ClassImp(AliGenCocktail) | |
39 | ||
40 | AliGenCocktail::AliGenCocktail() | |
1c56e311 | 41 | :AliGenerator(), |
42 | fNGenerators(0), | |
8058ead1 | 43 | fTotalRate(0.), |
ab834258 | 44 | fSRandom(kFALSE), |
1c56e311 | 45 | fUsePerEventRate(kFALSE), |
46 | fProb(0), | |
47 | fEntries(0), | |
48 | flnk1(0), | |
49 | flnk2(0), | |
9577906a | 50 | fHeader(0), |
51 | fSeed(0) | |
fe4da5cc | 52 | { |
374924b5 | 53 | // Constructor |
8b31bfac | 54 | fName = "Cocktail"; |
55 | fTitle= "Particle Generator using cocktail of generators"; | |
fe4da5cc | 56 | } |
57 | ||
fe4da5cc | 58 | AliGenCocktail::~AliGenCocktail() |
59 | { | |
374924b5 | 60 | // Destructor |
fe4da5cc | 61 | delete fEntries; |
373c1a55 | 62 | fEntries = 0; |
63 | // delete fHeader; // It is removed in AliRunLoader | |
64 | fHeader = 0; | |
fe4da5cc | 65 | } |
66 | ||
67 | void AliGenCocktail:: | |
8c1efaa8 | 68 | AddGenerator(AliGenerator *Generator, const char* Name, Float_t RateExp, TFormula* formula, Int_t ntimes) |
fe4da5cc | 69 | { |
b1403e15 | 70 | // |
71 | // Add a generator to the list | |
72 | // First check that list exists | |
73 | if (!fEntries) fEntries = new TList(); | |
8058ead1 | 74 | fTotalRate += RateExp; |
fe4da5cc | 75 | // |
76 | // Forward parameters to the new generator | |
212bcf04 | 77 | if(TestBit(kPtRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange))) |
78 | Generator->SetPtRange(fPtMin,fPtMax); | |
79 | if(TestBit(kMomentumRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange))) | |
80 | Generator->SetMomentumRange(fPMin,fPMax); | |
81 | ||
565cc9c0 | 82 | if (TestBit(kYRange) && !(Generator->TestBit(kYRange))) |
212bcf04 | 83 | Generator->SetYRange(fYMin,fYMax); |
565cc9c0 | 84 | if (TestBit(kPhiRange) && !(Generator->TestBit(kPhiRange))) |
212bcf04 | 85 | Generator->SetPhiRange(fPhiMin*180/TMath::Pi(),fPhiMax*180/TMath::Pi()); |
565cc9c0 | 86 | if (TestBit(kThetaRange) && !(Generator->TestBit(kThetaRange)) && !(Generator->TestBit(kEtaRange))) |
212bcf04 | 87 | Generator->SetThetaRange(fThetaMin*180/TMath::Pi(),fThetaMax*180/TMath::Pi()); |
2b597689 | 88 | if (!(Generator->TestBit(kVertexRange))) { |
212bcf04 | 89 | Generator->SetOrigin(fOrigin[0], fOrigin[1], fOrigin[2]); |
4a6ca8fc | 90 | Generator->SetSigma(fOsigma[0], fOsigma[1], fOsigma[2]); |
91 | Generator->SetVertexSmear(fVertexSmear); | |
92 | Generator->SetVertexSource(kContainer); | |
93 | } | |
c8f7f6f9 | 94 | Generator->SetTrackingFlag(fTrackIt); |
4f85aa78 | 95 | Generator->SetContainer(this); |
7c54213e | 96 | |
c97002cc | 97 | |
fe4da5cc | 98 | // |
99 | // Add generator to list | |
c5c3e4b0 | 100 | char theName[256]; |
04a640a7 | 101 | snprintf(theName, 256, "%s_%d",Name, fNGenerators); |
c5c3e4b0 | 102 | Generator->SetName(theName); |
103 | ||
374924b5 | 104 | AliGenCocktailEntry *entry = |
fe4da5cc | 105 | new AliGenCocktailEntry(Generator, Name, RateExp); |
8c1efaa8 | 106 | if (formula) entry->SetFormula(formula); |
107 | entry->SetNTimes(ntimes); | |
374924b5 | 108 | fEntries->Add(entry); |
fe4da5cc | 109 | fNGenerators++; |
373c1a55 | 110 | flnk1 = 0; |
111 | flnk2 = 0; | |
ab834258 | 112 | fSRandom = kFALSE; |
373c1a55 | 113 | fHeader = 0; |
114 | } | |
fe4da5cc | 115 | |
116 | void AliGenCocktail::Init() | |
374924b5 | 117 | { |
118 | // Initialisation | |
119 | TIter next(fEntries); | |
120 | AliGenCocktailEntry *entry; | |
121 | // | |
122 | // Loop over generators and initialize | |
123 | while((entry = (AliGenCocktailEntry*)next())) { | |
c97002cc | 124 | if (fStack) entry->Generator()->SetStack(fStack); |
ab71c6e6 | 125 | entry->Generator()->SetSeed(fSeed); |
374924b5 | 126 | entry->Generator()->Init(); |
127 | } | |
1ebe6dc8 | 128 | |
129 | next.Reset(); | |
130 | ||
ab834258 | 131 | if (fSRandom) { |
1ebe6dc8 | 132 | fProb.Set(fNGenerators); |
133 | next.Reset(); | |
134 | Float_t sum = 0.; | |
135 | while((entry = (AliGenCocktailEntry*)next())) { | |
136 | sum += entry->Rate(); | |
137 | } | |
138 | ||
139 | next.Reset(); | |
140 | Int_t i = 0; | |
141 | Float_t psum = 0.; | |
142 | while((entry = (AliGenCocktailEntry*)next())) { | |
143 | psum += entry->Rate() / sum; | |
144 | fProb[i++] = psum; | |
145 | } | |
146 | } | |
147 | next.Reset(); | |
374924b5 | 148 | } |
fe4da5cc | 149 | |
09e2e187 | 150 | void AliGenCocktail::FinishRun() |
151 | { | |
152 | // Initialisation | |
153 | TIter next(fEntries); | |
154 | AliGenCocktailEntry *entry; | |
155 | // | |
156 | // Loop over generators and initialize | |
157 | while((entry = (AliGenCocktailEntry*)next())) { | |
158 | entry->Generator()->FinishRun(); | |
159 | } | |
160 | } | |
161 | ||
fe4da5cc | 162 | void AliGenCocktail::Generate() |
374924b5 | 163 | { |
164 | // | |
165 | // Generate event | |
166 | TIter next(fEntries); | |
a8408367 | 167 | AliGenCocktailEntry *entry = 0; |
168 | AliGenCocktailEntry *preventry = 0; | |
7c54213e | 169 | AliGenCocktailEntry *collentry = 0; |
a8408367 | 170 | AliGenerator* gen = 0; |
4f85aa78 | 171 | if (fHeader) delete fHeader; |
c89fc3f1 | 172 | |
173 | ||
4f85aa78 | 174 | fHeader = new AliGenCocktailEventHeader("Cocktail Header"); |
09e2e187 | 175 | |
d94af0c1 | 176 | const TObjArray *partArray = gAlice->GetMCApp()->Particles(); |
c8f7f6f9 | 177 | |
178 | // | |
179 | // Generate the vertex position used by all generators | |
180 | // | |
181 | if(fVertexSmear == kPerEvent) Vertex(); | |
182 | ||
67db3ff2 | 183 | TArrayF eventVertex; |
184 | eventVertex.Set(3); | |
185 | for (Int_t j=0; j < 3; j++) eventVertex[j] = fVertex[j]; | |
186 | ||
ab834258 | 187 | if (!fSRandom) { |
1ebe6dc8 | 188 | // |
189 | // Loop over generators and generate events | |
37098832 | 190 | Int_t igen = 0; |
1ebe6dc8 | 191 | while((entry = (AliGenCocktailEntry*)next())) { |
8c1efaa8 | 192 | Int_t ntimes = entry->NTimes(); |
7c54213e | 193 | if (fUsePerEventRate && (gRandom->Rndm() > entry->Rate())) continue; |
194 | ||
195 | igen++; | |
196 | if (igen ==1) { | |
197 | entry->SetFirst(0); | |
198 | } else { | |
199 | entry->SetFirst((partArray->GetEntriesFast())+1); | |
200 | } | |
201 | gen = entry->Generator(); | |
202 | if (gen->ProvidesCollisionGeometry()) collentry = entry; | |
203 | // | |
204 | // Handle case in which current generator needs collision geometry from previous generator | |
205 | // | |
206 | if (gen->NeedsCollisionGeometry() && (entry->Formula() == 0)) | |
a8408367 | 207 | { |
7c54213e | 208 | if (preventry && preventry->Generator()->ProvidesCollisionGeometry()) |
1ebe6dc8 | 209 | { |
7c54213e | 210 | gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry()); |
1ebe6dc8 | 211 | } else { |
7c54213e | 212 | Fatal("Generate()", "No Collision Geometry Provided"); |
213 | } | |
214 | } | |
215 | // | |
216 | // Number of signals is calculated from Collision Geometry | |
db051b0c | 217 | // and entry with given centrality bin is selected |
7c54213e | 218 | // |
219 | if (entry->Formula() != 0) | |
220 | { | |
221 | if (!collentry) { | |
222 | Fatal("Generate()", "No Collision Geometry Provided"); | |
223 | return; | |
224 | } | |
225 | AliCollisionGeometry* coll = (collentry->Generator())->CollisionGeometry(); | |
226 | Float_t b = coll->ImpactParameter(); | |
227 | Int_t nsig = Int_t(entry->Formula()->Eval(b)); | |
db051b0c | 228 | Int_t bin = entry->Bin() - 100; |
229 | if (bin > 0) { | |
230 | if (bin != nsig) continue; | |
231 | } else { | |
232 | if (nsig < 1) nsig = 1; | |
233 | AliInfo(Form("Signal Events %13.3f %5d %5d\n", b, coll->HardScatters(), nsig)); | |
234 | ntimes = nsig; | |
235 | } | |
a8408367 | 236 | } |
735e0707 | 237 | gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2), fTime); |
72cf8302 | 238 | |
d5615b85 | 239 | gen->GenerateN(ntimes); |
7c54213e | 240 | entry->SetLast(partArray->GetEntriesFast()); |
241 | preventry = entry; | |
242 | } | |
ab834258 | 243 | } else if (fSRandom) { |
1ebe6dc8 | 244 | // |
245 | // Select a generator randomly | |
246 | // | |
247 | Int_t i; | |
248 | Float_t p0 = gRandom->Rndm(); | |
249 | ||
250 | for (i = 0; i < fNGenerators; i++) { | |
251 | if (p0 < fProb[i]) break; | |
a8408367 | 252 | } |
1ebe6dc8 | 253 | |
254 | entry = (AliGenCocktailEntry*) fEntries->At(i); | |
255 | entry->SetFirst(0); | |
256 | gen = entry->Generator(); | |
735e0707 | 257 | gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2), fTime); |
08bffa4d | 258 | gen->Generate(); |
374924b5 | 259 | entry->SetLast(partArray->GetEntriesFast()); |
c89fc3f1 | 260 | } |
1ebe6dc8 | 261 | |
374924b5 | 262 | next.Reset(); |
4f85aa78 | 263 | |
45c05df7 | 264 | // Event Vertex |
4f85aa78 | 265 | fHeader->SetPrimaryVertex(eventVertex); |
bcee5fdf | 266 | fHeader->CalcNProduced(); |
45c05df7 | 267 | if (fContainer) { |
268 | fHeader->SetName(fName); | |
269 | fContainer->AddHeader(fHeader); | |
270 | } else { | |
271 | gAlice->SetGenEventHeader(fHeader); | |
272 | } | |
374924b5 | 273 | } |
fe4da5cc | 274 | |
c44d1c08 | 275 | void AliGenCocktail::SetVertexSmear(VertexSmear_t smear) |
276 | { | |
277 | // Set vertex smearing and propagate it to the generators | |
278 | ||
279 | AliGenerator::SetVertexSmear(smear); | |
280 | TIter next(fEntries); | |
281 | while (AliGenCocktailEntry* entry = (AliGenCocktailEntry*)next()) { | |
282 | entry->Generator()->SetVertexSmear(smear); | |
283 | } | |
284 | } | |
285 | ||
fe4da5cc | 286 | AliGenCocktailEntry * AliGenCocktail::FirstGenerator() |
287 | { | |
374924b5 | 288 | // Iterator over generators: Initialisation |
fe4da5cc | 289 | flnk1 = fEntries->FirstLink(); |
290 | if (flnk1) { | |
291 | return (AliGenCocktailEntry*) (flnk1->GetObject()); | |
292 | } else { | |
293 | return 0; | |
294 | } | |
295 | } | |
296 | ||
297 | AliGenCocktailEntry* AliGenCocktail::NextGenerator() | |
298 | { | |
374924b5 | 299 | // Iterator over generators: Increment |
fe4da5cc | 300 | flnk1 = flnk1->Next(); |
301 | if (flnk1) { | |
302 | return (AliGenCocktailEntry*) (flnk1->GetObject()); | |
303 | } else { | |
304 | return 0; | |
305 | } | |
306 | } | |
307 | ||
308 | void AliGenCocktail:: | |
309 | FirstGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2) | |
310 | { | |
374924b5 | 311 | // Iterator over generator pairs: Initialisation |
fe4da5cc | 312 | flnk2 = flnk1 = fEntries->FirstLink(); |
313 | if (flnk1) { | |
314 | e2 = e1 = (AliGenCocktailEntry*) (flnk1->GetObject()); | |
315 | } else { | |
316 | e2= e1 = 0; | |
317 | } | |
318 | } | |
319 | ||
320 | void AliGenCocktail:: | |
321 | NextGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2) | |
322 | { | |
374924b5 | 323 | // Iterator over generators: Increment |
fe4da5cc | 324 | flnk2 = flnk2->Next(); |
325 | if (flnk2) { | |
326 | e1 = (AliGenCocktailEntry*) (flnk1->GetObject()); | |
327 | e2 = (AliGenCocktailEntry*) (flnk2->GetObject()); | |
328 | } else { | |
329 | flnk2 = flnk1 = flnk1->Next(); | |
330 | if (flnk1) { | |
331 | e1 = (AliGenCocktailEntry*) (flnk1->GetObject()); | |
332 | e2 = (AliGenCocktailEntry*) (flnk2->GetObject()); | |
333 | } else { | |
334 | e1=0; | |
335 | e2=0; | |
336 | } | |
337 | } | |
338 | } | |
339 | ||
4f85aa78 | 340 | void AliGenCocktail::AddHeader(AliGenEventHeader* header) |
341 | { | |
342 | // Add a header to the list | |
343 | if (fHeader) fHeader->AddHeader(header); | |
344 | } | |
fe4da5cc | 345 | |
198bb1c7 | 346 | |
347 | ||
fe4da5cc | 348 |