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 ClassImp(AliGenCocktail)
36 AliGenCocktail::AliGenCocktail()
41 fTitle= "Particle Generator using cocktail of generators";
49 AliGenCocktail::AliGenCocktail(const AliGenCocktail & cocktail):
50 AliGenerator(cocktail)
56 AliGenCocktail::~AliGenCocktail()
63 AddGenerator(AliGenerator *Generator, char* Name, Float_t RateExp)
66 // Add a generator to the list
67 // First check that list exists
68 if (!fEntries) fEntries = new TList();
71 // Forward parameters to the new generator
72 if(TestBit(kPtRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange)))
73 Generator->SetPtRange(fPtMin,fPtMax);
74 if(TestBit(kMomentumRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange)))
75 Generator->SetMomentumRange(fPMin,fPMax);
77 if (!(Generator->TestBit(kYRange)))
78 Generator->SetYRange(fYMin,fYMax);
79 if (!(Generator->TestBit(kPhiRange)))
80 Generator->SetPhiRange(fPhiMin*180/TMath::Pi(),fPhiMax*180/TMath::Pi());
81 if (!(Generator->TestBit(kThetaRange)))
82 Generator->SetThetaRange(fThetaMin*180/TMath::Pi(),fThetaMax*180/TMath::Pi());
83 if (!(Generator->TestBit(kVertexRange)))
84 Generator->SetOrigin(fOrigin[0], fOrigin[1], fOrigin[2]);
86 Generator->SetSigma(fOsigma[0], fOsigma[1], fOsigma[2]);
87 Generator->SetVertexSmear(fVertexSmear);
88 Generator->SetVertexSource(kContainer);
89 Generator->SetTrackingFlag(fTrackIt);
91 // Add generator to list
93 AliGenCocktailEntry *entry =
94 new AliGenCocktailEntry(Generator, Name, RateExp);
99 void AliGenCocktail::Init()
102 TIter next(fEntries);
103 AliGenCocktailEntry *entry;
105 // Loop over generators and initialize
106 while((entry = (AliGenCocktailEntry*)next())) {
107 entry->Generator()->Init();
111 void AliGenCocktail::FinishRun()
114 TIter next(fEntries);
115 AliGenCocktailEntry *entry;
117 // Loop over generators and initialize
118 while((entry = (AliGenCocktailEntry*)next())) {
119 entry->Generator()->FinishRun();
123 void AliGenCocktail::Generate()
127 TIter next(fEntries);
128 AliGenCocktailEntry *entry = 0;
129 AliGenCocktailEntry *preventry = 0;
130 AliGenerator* gen = 0;
132 TObjArray *partArray = gAlice->Particles();
135 // Generate the vertex position used by all generators
137 if(fVertexSmear == kPerEvent) Vertex();
141 // Loop over generators and generate events
144 while((entry = (AliGenCocktailEntry*)next())) {
149 entry->SetFirst((partArray->GetEntriesFast())+1);
152 // Handle case in which current generator needs collision geometry from previous generator
154 gen = entry->Generator();
155 if (gen->NeedsCollisionGeometry())
157 if (preventry && preventry->Generator()->ProvidesCollisionGeometry())
159 gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry());
161 Fatal("Generate()", "No Collision Geometry Provided");
164 entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
165 entry->Generator()->Generate();
166 entry->SetLast(partArray->GetEntriesFast());
172 AliGenCocktailEntry * AliGenCocktail::FirstGenerator()
174 // Iterator over generators: Initialisation
175 flnk1 = fEntries->FirstLink();
177 return (AliGenCocktailEntry*) (flnk1->GetObject());
183 AliGenCocktailEntry* AliGenCocktail::NextGenerator()
185 // Iterator over generators: Increment
186 flnk1 = flnk1->Next();
188 return (AliGenCocktailEntry*) (flnk1->GetObject());
194 void AliGenCocktail::
195 FirstGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
197 // Iterator over generator pairs: Initialisation
198 flnk2 = flnk1 = fEntries->FirstLink();
200 e2 = e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
206 void AliGenCocktail::
207 NextGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
209 // Iterator over generators: Increment
210 flnk2 = flnk2->Next();
212 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
213 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
215 flnk2 = flnk1 = flnk1->Next();
217 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
218 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
226 AliGenCocktail& AliGenCocktail::operator=(const AliGenCocktail& rhs)
228 // Assignment operator
233 void AliGenCocktail::Copy(AliGenCocktail &) const
235 Fatal("Copy","Not implemented!\n");