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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> | |
28 | ||
fe4da5cc | 29 | #include "AliGenCocktail.h" |
374924b5 | 30 | #include "AliGenCocktailEntry.h" |
09e2e187 | 31 | #include "AliCollisionGeometry.h" |
fe4da5cc | 32 | #include "AliRun.h" |
5d12ce38 | 33 | #include "AliMC.h" |
4f85aa78 | 34 | #include "AliGenCocktailEventHeader.h" |
fe4da5cc | 35 | |
36 | ClassImp(AliGenCocktail) | |
37 | ||
38 | AliGenCocktail::AliGenCocktail() | |
1c56e311 | 39 | :AliGenerator(), |
40 | fNGenerators(0), | |
41 | fRandom(kFALSE), | |
42 | fUsePerEventRate(kFALSE), | |
43 | fProb(0), | |
44 | fEntries(0), | |
45 | flnk1(0), | |
46 | flnk2(0), | |
47 | fHeader(0) | |
fe4da5cc | 48 | { |
374924b5 | 49 | // Constructor |
8b31bfac | 50 | fName = "Cocktail"; |
51 | fTitle= "Particle Generator using cocktail of generators"; | |
fe4da5cc | 52 | } |
53 | ||
198bb1c7 | 54 | AliGenCocktail::AliGenCocktail(const AliGenCocktail & cocktail): |
1c56e311 | 55 | AliGenerator(cocktail), |
56 | fNGenerators(0), | |
57 | fRandom(kFALSE), | |
58 | fUsePerEventRate(kFALSE), | |
59 | fProb(0), | |
60 | fEntries(0), | |
61 | flnk1(0), | |
62 | flnk2(0), | |
63 | fHeader(0) | |
374924b5 | 64 | { |
198bb1c7 | 65 | // Copy constructor |
66 | cocktail.Copy(*this); | |
374924b5 | 67 | } |
fe4da5cc | 68 | |
69 | AliGenCocktail::~AliGenCocktail() | |
70 | { | |
374924b5 | 71 | // Destructor |
fe4da5cc | 72 | delete fEntries; |
373c1a55 | 73 | fEntries = 0; |
74 | // delete fHeader; // It is removed in AliRunLoader | |
75 | fHeader = 0; | |
fe4da5cc | 76 | } |
77 | ||
78 | void AliGenCocktail:: | |
a764b7de | 79 | AddGenerator(AliGenerator *Generator, const char* Name, Float_t RateExp) |
fe4da5cc | 80 | { |
b1403e15 | 81 | // |
82 | // Add a generator to the list | |
83 | // First check that list exists | |
84 | if (!fEntries) fEntries = new TList(); | |
85 | ||
fe4da5cc | 86 | // |
87 | // Forward parameters to the new generator | |
212bcf04 | 88 | if(TestBit(kPtRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange))) |
89 | Generator->SetPtRange(fPtMin,fPtMax); | |
90 | if(TestBit(kMomentumRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange))) | |
91 | Generator->SetMomentumRange(fPMin,fPMax); | |
92 | ||
93 | if (!(Generator->TestBit(kYRange))) | |
94 | Generator->SetYRange(fYMin,fYMax); | |
95 | if (!(Generator->TestBit(kPhiRange))) | |
96 | Generator->SetPhiRange(fPhiMin*180/TMath::Pi(),fPhiMax*180/TMath::Pi()); | |
97 | if (!(Generator->TestBit(kThetaRange))) | |
98 | Generator->SetThetaRange(fThetaMin*180/TMath::Pi(),fThetaMax*180/TMath::Pi()); | |
99 | if (!(Generator->TestBit(kVertexRange))) | |
100 | Generator->SetOrigin(fOrigin[0], fOrigin[1], fOrigin[2]); | |
c8f7f6f9 | 101 | |
102 | Generator->SetSigma(fOsigma[0], fOsigma[1], fOsigma[2]); | |
7a50a130 | 103 | Generator->SetVertexSmear(fVertexSmear); |
c8f7f6f9 | 104 | Generator->SetVertexSource(kContainer); |
105 | Generator->SetTrackingFlag(fTrackIt); | |
4f85aa78 | 106 | Generator->SetContainer(this); |
107 | ||
c97002cc | 108 | |
fe4da5cc | 109 | // |
110 | // Add generator to list | |
c5c3e4b0 | 111 | char theName[256]; |
112 | sprintf(theName, "%s_%d",Name, fNGenerators); | |
113 | Generator->SetName(theName); | |
114 | ||
374924b5 | 115 | AliGenCocktailEntry *entry = |
fe4da5cc | 116 | new AliGenCocktailEntry(Generator, Name, RateExp); |
c5c3e4b0 | 117 | |
374924b5 | 118 | fEntries->Add(entry); |
fe4da5cc | 119 | fNGenerators++; |
373c1a55 | 120 | flnk1 = 0; |
121 | flnk2 = 0; | |
122 | fRandom = kFALSE; | |
123 | fHeader = 0; | |
124 | } | |
fe4da5cc | 125 | |
126 | void AliGenCocktail::Init() | |
374924b5 | 127 | { |
128 | // Initialisation | |
129 | TIter next(fEntries); | |
130 | AliGenCocktailEntry *entry; | |
131 | // | |
132 | // Loop over generators and initialize | |
133 | while((entry = (AliGenCocktailEntry*)next())) { | |
c97002cc | 134 | if (fStack) entry->Generator()->SetStack(fStack); |
374924b5 | 135 | entry->Generator()->Init(); |
136 | } | |
1ebe6dc8 | 137 | |
138 | next.Reset(); | |
139 | ||
140 | if (fRandom) { | |
141 | fProb.Set(fNGenerators); | |
142 | next.Reset(); | |
143 | Float_t sum = 0.; | |
144 | while((entry = (AliGenCocktailEntry*)next())) { | |
145 | sum += entry->Rate(); | |
146 | } | |
147 | ||
148 | next.Reset(); | |
149 | Int_t i = 0; | |
150 | Float_t psum = 0.; | |
151 | while((entry = (AliGenCocktailEntry*)next())) { | |
152 | psum += entry->Rate() / sum; | |
153 | fProb[i++] = psum; | |
154 | } | |
155 | } | |
156 | next.Reset(); | |
374924b5 | 157 | } |
fe4da5cc | 158 | |
09e2e187 | 159 | void AliGenCocktail::FinishRun() |
160 | { | |
161 | // Initialisation | |
162 | TIter next(fEntries); | |
163 | AliGenCocktailEntry *entry; | |
164 | // | |
165 | // Loop over generators and initialize | |
166 | while((entry = (AliGenCocktailEntry*)next())) { | |
167 | entry->Generator()->FinishRun(); | |
168 | } | |
169 | } | |
170 | ||
fe4da5cc | 171 | void AliGenCocktail::Generate() |
374924b5 | 172 | { |
173 | // | |
174 | // Generate event | |
175 | TIter next(fEntries); | |
a8408367 | 176 | AliGenCocktailEntry *entry = 0; |
177 | AliGenCocktailEntry *preventry = 0; | |
178 | AliGenerator* gen = 0; | |
4f85aa78 | 179 | if (fHeader) delete fHeader; |
c89fc3f1 | 180 | |
181 | ||
4f85aa78 | 182 | fHeader = new AliGenCocktailEventHeader("Cocktail Header"); |
09e2e187 | 183 | |
5d12ce38 | 184 | TObjArray *partArray = gAlice->GetMCApp()->Particles(); |
c8f7f6f9 | 185 | |
186 | // | |
187 | // Generate the vertex position used by all generators | |
188 | // | |
189 | if(fVertexSmear == kPerEvent) Vertex(); | |
190 | ||
67db3ff2 | 191 | TArrayF eventVertex; |
192 | eventVertex.Set(3); | |
193 | for (Int_t j=0; j < 3; j++) eventVertex[j] = fVertex[j]; | |
194 | ||
1ebe6dc8 | 195 | if (!fRandom) { |
196 | // | |
197 | // Loop over generators and generate events | |
198 | Int_t igen=0; | |
1ebe6dc8 | 199 | while((entry = (AliGenCocktailEntry*)next())) { |
c89fc3f1 | 200 | if (fUsePerEventRate && (gRandom->Rndm() > entry->Rate())) continue; |
201 | ||
1ebe6dc8 | 202 | igen++; |
203 | if (igen ==1) { | |
204 | entry->SetFirst(0); | |
205 | } else { | |
206 | entry->SetFirst((partArray->GetEntriesFast())+1); | |
207 | } | |
a8408367 | 208 | // |
209 | // Handle case in which current generator needs collision geometry from previous generator | |
210 | // | |
1ebe6dc8 | 211 | gen = entry->Generator(); |
212 | if (gen->NeedsCollisionGeometry()) | |
a8408367 | 213 | { |
1ebe6dc8 | 214 | if (preventry && preventry->Generator()->ProvidesCollisionGeometry()) |
215 | { | |
216 | gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry()); | |
217 | } else { | |
218 | Fatal("Generate()", "No Collision Geometry Provided"); | |
219 | } | |
a8408367 | 220 | } |
1ebe6dc8 | 221 | entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2)); |
222 | entry->Generator()->Generate(); | |
223 | entry->SetLast(partArray->GetEntriesFast()); | |
224 | preventry = entry; | |
225 | } | |
c89fc3f1 | 226 | } else if (fRandom) { |
1ebe6dc8 | 227 | // |
228 | // Select a generator randomly | |
229 | // | |
230 | Int_t i; | |
231 | Float_t p0 = gRandom->Rndm(); | |
232 | ||
233 | for (i = 0; i < fNGenerators; i++) { | |
234 | if (p0 < fProb[i]) break; | |
a8408367 | 235 | } |
1ebe6dc8 | 236 | |
237 | entry = (AliGenCocktailEntry*) fEntries->At(i); | |
238 | entry->SetFirst(0); | |
239 | gen = entry->Generator(); | |
c8f7f6f9 | 240 | entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2)); |
374924b5 | 241 | entry->Generator()->Generate(); |
242 | entry->SetLast(partArray->GetEntriesFast()); | |
c89fc3f1 | 243 | } |
1ebe6dc8 | 244 | |
374924b5 | 245 | next.Reset(); |
4f85aa78 | 246 | |
67db3ff2 | 247 | // Event Vertex |
4f85aa78 | 248 | fHeader->SetPrimaryVertex(eventVertex); |
249 | gAlice->SetGenEventHeader(fHeader); | |
374924b5 | 250 | } |
fe4da5cc | 251 | |
c44d1c08 | 252 | void AliGenCocktail::SetVertexSmear(VertexSmear_t smear) |
253 | { | |
254 | // Set vertex smearing and propagate it to the generators | |
255 | ||
256 | AliGenerator::SetVertexSmear(smear); | |
257 | TIter next(fEntries); | |
258 | while (AliGenCocktailEntry* entry = (AliGenCocktailEntry*)next()) { | |
259 | entry->Generator()->SetVertexSmear(smear); | |
260 | } | |
261 | } | |
262 | ||
fe4da5cc | 263 | AliGenCocktailEntry * AliGenCocktail::FirstGenerator() |
264 | { | |
374924b5 | 265 | // Iterator over generators: Initialisation |
fe4da5cc | 266 | flnk1 = fEntries->FirstLink(); |
267 | if (flnk1) { | |
268 | return (AliGenCocktailEntry*) (flnk1->GetObject()); | |
269 | } else { | |
270 | return 0; | |
271 | } | |
272 | } | |
273 | ||
274 | AliGenCocktailEntry* AliGenCocktail::NextGenerator() | |
275 | { | |
374924b5 | 276 | // Iterator over generators: Increment |
fe4da5cc | 277 | flnk1 = flnk1->Next(); |
278 | if (flnk1) { | |
279 | return (AliGenCocktailEntry*) (flnk1->GetObject()); | |
280 | } else { | |
281 | return 0; | |
282 | } | |
283 | } | |
284 | ||
285 | void AliGenCocktail:: | |
286 | FirstGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2) | |
287 | { | |
374924b5 | 288 | // Iterator over generator pairs: Initialisation |
fe4da5cc | 289 | flnk2 = flnk1 = fEntries->FirstLink(); |
290 | if (flnk1) { | |
291 | e2 = e1 = (AliGenCocktailEntry*) (flnk1->GetObject()); | |
292 | } else { | |
293 | e2= e1 = 0; | |
294 | } | |
295 | } | |
296 | ||
297 | void AliGenCocktail:: | |
298 | NextGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2) | |
299 | { | |
374924b5 | 300 | // Iterator over generators: Increment |
fe4da5cc | 301 | flnk2 = flnk2->Next(); |
302 | if (flnk2) { | |
303 | e1 = (AliGenCocktailEntry*) (flnk1->GetObject()); | |
304 | e2 = (AliGenCocktailEntry*) (flnk2->GetObject()); | |
305 | } else { | |
306 | flnk2 = flnk1 = flnk1->Next(); | |
307 | if (flnk1) { | |
308 | e1 = (AliGenCocktailEntry*) (flnk1->GetObject()); | |
309 | e2 = (AliGenCocktailEntry*) (flnk2->GetObject()); | |
310 | } else { | |
311 | e1=0; | |
312 | e2=0; | |
313 | } | |
314 | } | |
315 | } | |
316 | ||
4f85aa78 | 317 | void AliGenCocktail::AddHeader(AliGenEventHeader* header) |
318 | { | |
319 | // Add a header to the list | |
320 | if (fHeader) fHeader->AddHeader(header); | |
321 | } | |
322 | ||
374924b5 | 323 | AliGenCocktail& AliGenCocktail::operator=(const AliGenCocktail& rhs) |
324 | { | |
325 | // Assignment operator | |
198bb1c7 | 326 | rhs.Copy(*this); |
327 | return (*this); | |
fe4da5cc | 328 | } |
329 | ||
dc1d768c | 330 | void AliGenCocktail::Copy(TObject &) const |
198bb1c7 | 331 | { |
332 | Fatal("Copy","Not implemented!\n"); | |
333 | } | |
334 | ||
335 | ||
fe4da5cc | 336 |