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"
35 ClassImp(AliGenCocktail)
37 AliGenCocktail::AliGenCocktail()
42 fTitle= "Particle Generator using cocktail of generators";
50 AliGenCocktail::AliGenCocktail(const AliGenCocktail & cocktail):
51 AliGenerator(cocktail)
57 AliGenCocktail::~AliGenCocktail()
64 AddGenerator(AliGenerator *Generator, const char* Name, Float_t RateExp)
67 // Add a generator to the list
68 // First check that list exists
69 if (!fEntries) fEntries = new TList();
72 // Forward parameters to the new generator
73 if(TestBit(kPtRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange)))
74 Generator->SetPtRange(fPtMin,fPtMax);
75 if(TestBit(kMomentumRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange)))
76 Generator->SetMomentumRange(fPMin,fPMax);
78 if (!(Generator->TestBit(kYRange)))
79 Generator->SetYRange(fYMin,fYMax);
80 if (!(Generator->TestBit(kPhiRange)))
81 Generator->SetPhiRange(fPhiMin*180/TMath::Pi(),fPhiMax*180/TMath::Pi());
82 if (!(Generator->TestBit(kThetaRange)))
83 Generator->SetThetaRange(fThetaMin*180/TMath::Pi(),fThetaMax*180/TMath::Pi());
84 if (!(Generator->TestBit(kVertexRange)))
85 Generator->SetOrigin(fOrigin[0], fOrigin[1], fOrigin[2]);
87 Generator->SetSigma(fOsigma[0], fOsigma[1], fOsigma[2]);
88 Generator->SetVertexSmear(fVertexSmear);
89 Generator->SetVertexSource(kContainer);
90 Generator->SetTrackingFlag(fTrackIt);
93 // Add generator to list
95 sprintf(theName, "%s_%d",Name, fNGenerators);
96 Generator->SetName(theName);
98 AliGenCocktailEntry *entry =
99 new AliGenCocktailEntry(Generator, Name, RateExp);
101 fEntries->Add(entry);
105 void AliGenCocktail::Init()
108 TIter next(fEntries);
109 AliGenCocktailEntry *entry;
111 // Loop over generators and initialize
112 while((entry = (AliGenCocktailEntry*)next())) {
113 if (fStack) entry->Generator()->SetStack(fStack);
114 entry->Generator()->Init();
118 void AliGenCocktail::FinishRun()
121 TIter next(fEntries);
122 AliGenCocktailEntry *entry;
124 // Loop over generators and initialize
125 while((entry = (AliGenCocktailEntry*)next())) {
126 entry->Generator()->FinishRun();
130 void AliGenCocktail::Generate()
134 TIter next(fEntries);
135 AliGenCocktailEntry *entry = 0;
136 AliGenCocktailEntry *preventry = 0;
137 AliGenerator* gen = 0;
139 TObjArray *partArray = gAlice->GetMCApp()->Particles();
142 // Generate the vertex position used by all generators
144 if(fVertexSmear == kPerEvent) Vertex();
148 // Loop over generators and generate events
151 while((entry = (AliGenCocktailEntry*)next())) {
156 entry->SetFirst((partArray->GetEntriesFast())+1);
159 // Handle case in which current generator needs collision geometry from previous generator
161 gen = entry->Generator();
162 if (gen->NeedsCollisionGeometry())
164 if (preventry && preventry->Generator()->ProvidesCollisionGeometry())
166 gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry());
168 Fatal("Generate()", "No Collision Geometry Provided");
171 entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
172 entry->Generator()->Generate();
173 entry->SetLast(partArray->GetEntriesFast());
179 AliGenCocktailEntry * AliGenCocktail::FirstGenerator()
181 // Iterator over generators: Initialisation
182 flnk1 = fEntries->FirstLink();
184 return (AliGenCocktailEntry*) (flnk1->GetObject());
190 AliGenCocktailEntry* AliGenCocktail::NextGenerator()
192 // Iterator over generators: Increment
193 flnk1 = flnk1->Next();
195 return (AliGenCocktailEntry*) (flnk1->GetObject());
201 void AliGenCocktail::
202 FirstGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
204 // Iterator over generator pairs: Initialisation
205 flnk2 = flnk1 = fEntries->FirstLink();
207 e2 = e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
213 void AliGenCocktail::
214 NextGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
216 // Iterator over generators: Increment
217 flnk2 = flnk2->Next();
219 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
220 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
222 flnk2 = flnk1 = flnk1->Next();
224 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
225 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
233 AliGenCocktail& AliGenCocktail::operator=(const AliGenCocktail& rhs)
235 // Assignment operator
240 void AliGenCocktail::Copy(TObject &) const
242 Fatal("Copy","Not implemented!\n");