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);
92 // Add generator to list
94 sprintf(theName, "%s_%d",Name, fNGenerators);
95 Generator->SetName(theName);
97 AliGenCocktailEntry *entry =
98 new AliGenCocktailEntry(Generator, Name, RateExp);
100 fEntries->Add(entry);
104 void AliGenCocktail::Init()
107 TIter next(fEntries);
108 AliGenCocktailEntry *entry;
110 // Loop over generators and initialize
111 while((entry = (AliGenCocktailEntry*)next())) {
112 entry->Generator()->Init();
116 void AliGenCocktail::FinishRun()
119 TIter next(fEntries);
120 AliGenCocktailEntry *entry;
122 // Loop over generators and initialize
123 while((entry = (AliGenCocktailEntry*)next())) {
124 entry->Generator()->FinishRun();
128 void AliGenCocktail::Generate()
132 TIter next(fEntries);
133 AliGenCocktailEntry *entry = 0;
134 AliGenCocktailEntry *preventry = 0;
135 AliGenerator* gen = 0;
137 TObjArray *partArray = gAlice->GetMCApp()->Particles();
140 // Generate the vertex position used by all generators
142 if(fVertexSmear == kPerEvent) Vertex();
146 // Loop over generators and generate events
149 while((entry = (AliGenCocktailEntry*)next())) {
154 entry->SetFirst((partArray->GetEntriesFast())+1);
157 // Handle case in which current generator needs collision geometry from previous generator
159 gen = entry->Generator();
160 if (gen->NeedsCollisionGeometry())
162 if (preventry && preventry->Generator()->ProvidesCollisionGeometry())
164 gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry());
166 Fatal("Generate()", "No Collision Geometry Provided");
169 entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
170 entry->Generator()->Generate();
171 entry->SetLast(partArray->GetEntriesFast());
177 AliGenCocktailEntry * AliGenCocktail::FirstGenerator()
179 // Iterator over generators: Initialisation
180 flnk1 = fEntries->FirstLink();
182 return (AliGenCocktailEntry*) (flnk1->GetObject());
188 AliGenCocktailEntry* AliGenCocktail::NextGenerator()
190 // Iterator over generators: Increment
191 flnk1 = flnk1->Next();
193 return (AliGenCocktailEntry*) (flnk1->GetObject());
199 void AliGenCocktail::
200 FirstGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
202 // Iterator over generator pairs: Initialisation
203 flnk2 = flnk1 = fEntries->FirstLink();
205 e2 = e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
211 void AliGenCocktail::
212 NextGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
214 // Iterator over generators: Increment
215 flnk2 = flnk2->Next();
217 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
218 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
220 flnk2 = flnk1 = flnk1->Next();
222 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
223 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
231 AliGenCocktail& AliGenCocktail::operator=(const AliGenCocktail& rhs)
233 // Assignment operator
238 void AliGenCocktail::Copy(TObject &) const
240 Fatal("Copy","Not implemented!\n");