1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
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
27 #include <TObjArray.h>
29 #include "AliGenCocktail.h"
30 #include "AliGenCocktailEntry.h"
31 #include "AliCollisionGeometry.h"
34 #include "AliGenCocktailEventHeader.h"
36 ClassImp(AliGenCocktail)
38 AliGenCocktail::AliGenCocktail()
42 fUsePerEventRate(kFALSE),
51 fTitle= "Particle Generator using cocktail of generators";
54 AliGenCocktail::AliGenCocktail(const AliGenCocktail & cocktail):
55 AliGenerator(cocktail),
58 fUsePerEventRate(kFALSE),
69 AliGenCocktail::~AliGenCocktail()
74 // delete fHeader; // It is removed in AliRunLoader
79 AddGenerator(AliGenerator *Generator, const char* Name, Float_t RateExp)
82 // Add a generator to the list
83 // First check that list exists
84 if (!fEntries) fEntries = new TList();
87 // Forward parameters to the new generator
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);
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]);
102 Generator->SetSigma(fOsigma[0], fOsigma[1], fOsigma[2]);
103 Generator->SetVertexSmear(fVertexSmear);
104 Generator->SetVertexSource(kContainer);
105 Generator->SetTrackingFlag(fTrackIt);
106 Generator->SetContainer(this);
110 // Add generator to list
112 sprintf(theName, "%s_%d",Name, fNGenerators);
113 Generator->SetName(theName);
115 AliGenCocktailEntry *entry =
116 new AliGenCocktailEntry(Generator, Name, RateExp);
118 fEntries->Add(entry);
126 void AliGenCocktail::Init()
129 TIter next(fEntries);
130 AliGenCocktailEntry *entry;
132 // Loop over generators and initialize
133 while((entry = (AliGenCocktailEntry*)next())) {
134 if (fStack) entry->Generator()->SetStack(fStack);
135 entry->Generator()->Init();
141 fProb.Set(fNGenerators);
144 while((entry = (AliGenCocktailEntry*)next())) {
145 sum += entry->Rate();
151 while((entry = (AliGenCocktailEntry*)next())) {
152 psum += entry->Rate() / sum;
159 void AliGenCocktail::FinishRun()
162 TIter next(fEntries);
163 AliGenCocktailEntry *entry;
165 // Loop over generators and initialize
166 while((entry = (AliGenCocktailEntry*)next())) {
167 entry->Generator()->FinishRun();
171 void AliGenCocktail::Generate()
175 TIter next(fEntries);
176 AliGenCocktailEntry *entry = 0;
177 AliGenCocktailEntry *preventry = 0;
178 AliGenerator* gen = 0;
179 if (fHeader) delete fHeader;
182 fHeader = new AliGenCocktailEventHeader("Cocktail Header");
184 TObjArray *partArray = gAlice->GetMCApp()->Particles();
187 // Generate the vertex position used by all generators
189 if(fVertexSmear == kPerEvent) Vertex();
193 for (Int_t j=0; j < 3; j++) eventVertex[j] = fVertex[j];
197 // Loop over generators and generate events
199 while((entry = (AliGenCocktailEntry*)next())) {
200 if (fUsePerEventRate && (gRandom->Rndm() > entry->Rate())) continue;
206 entry->SetFirst((partArray->GetEntriesFast())+1);
209 // Handle case in which current generator needs collision geometry from previous generator
211 gen = entry->Generator();
212 if (gen->NeedsCollisionGeometry())
214 if (preventry && preventry->Generator()->ProvidesCollisionGeometry())
216 gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry());
218 Fatal("Generate()", "No Collision Geometry Provided");
221 entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
222 entry->Generator()->Generate();
223 entry->SetLast(partArray->GetEntriesFast());
226 } else if (fRandom) {
228 // Select a generator randomly
231 Float_t p0 = gRandom->Rndm();
233 for (i = 0; i < fNGenerators; i++) {
234 if (p0 < fProb[i]) break;
237 entry = (AliGenCocktailEntry*) fEntries->At(i);
239 gen = entry->Generator();
240 entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
241 entry->Generator()->Generate();
242 entry->SetLast(partArray->GetEntriesFast());
248 fHeader->SetPrimaryVertex(eventVertex);
249 gAlice->SetGenEventHeader(fHeader);
252 void AliGenCocktail::SetVertexSmear(VertexSmear_t smear)
254 // Set vertex smearing and propagate it to the generators
256 AliGenerator::SetVertexSmear(smear);
257 TIter next(fEntries);
258 while (AliGenCocktailEntry* entry = (AliGenCocktailEntry*)next()) {
259 entry->Generator()->SetVertexSmear(smear);
263 AliGenCocktailEntry * AliGenCocktail::FirstGenerator()
265 // Iterator over generators: Initialisation
266 flnk1 = fEntries->FirstLink();
268 return (AliGenCocktailEntry*) (flnk1->GetObject());
274 AliGenCocktailEntry* AliGenCocktail::NextGenerator()
276 // Iterator over generators: Increment
277 flnk1 = flnk1->Next();
279 return (AliGenCocktailEntry*) (flnk1->GetObject());
285 void AliGenCocktail::
286 FirstGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
288 // Iterator over generator pairs: Initialisation
289 flnk2 = flnk1 = fEntries->FirstLink();
291 e2 = e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
297 void AliGenCocktail::
298 NextGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
300 // Iterator over generators: Increment
301 flnk2 = flnk2->Next();
303 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
304 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
306 flnk2 = flnk1 = flnk1->Next();
308 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
309 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
317 void AliGenCocktail::AddHeader(AliGenEventHeader* header)
319 // Add a header to the list
320 if (fHeader) fHeader->AddHeader(header);
323 AliGenCocktail& AliGenCocktail::operator=(const AliGenCocktail& rhs)
325 // Assignment operator
330 void AliGenCocktail::Copy(TObject &) const
332 Fatal("Copy","Not implemented!\n");