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