Sumv2 used for correct calculation of histogram errors
[u/mrichter/AliRoot.git] / EVGEN / AliGenCocktail.cxx
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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"
fe4da5cc 34
35ClassImp(AliGenCocktail)
36
37AliGenCocktail::AliGenCocktail()
38 :AliGenerator()
39{
374924b5 40// Constructor
8b31bfac 41 fName = "Cocktail";
42 fTitle= "Particle Generator using cocktail of generators";
2685bf00 43 flnk1 = 0;
44 flnk2 = 0;
fe4da5cc 45 fNGenerators=0;
b1403e15 46 fEntries = 0;
47
fe4da5cc 48}
49
198bb1c7 50AliGenCocktail::AliGenCocktail(const AliGenCocktail & cocktail):
51 AliGenerator(cocktail)
374924b5 52{
198bb1c7 53// Copy constructor
54 cocktail.Copy(*this);
374924b5 55}
fe4da5cc 56
57AliGenCocktail::~AliGenCocktail()
58{
374924b5 59// Destructor
fe4da5cc 60 delete fEntries;
61}
62
63void AliGenCocktail::
a436e7fc 64AddGenerator(AliGenerator *Generator, char* Name, Float_t RateExp)
fe4da5cc 65{
66//
b1403e15 67// Add a generator to the list
68// First check that list exists
69 if (!fEntries) fEntries = new TList();
70
71//
fe4da5cc 72// Forward parameters to the new generator
212bcf04 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);
77
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]);
c8f7f6f9 86
87 Generator->SetSigma(fOsigma[0], fOsigma[1], fOsigma[2]);
7a50a130 88 Generator->SetVertexSmear(fVertexSmear);
c8f7f6f9 89 Generator->SetVertexSource(kContainer);
90 Generator->SetTrackingFlag(fTrackIt);
fe4da5cc 91//
92// Add generator to list
a436e7fc 93
374924b5 94 AliGenCocktailEntry *entry =
fe4da5cc 95 new AliGenCocktailEntry(Generator, Name, RateExp);
374924b5 96 fEntries->Add(entry);
fe4da5cc 97 fNGenerators++;
98 }
99
100 void AliGenCocktail::Init()
374924b5 101{
102// Initialisation
103 TIter next(fEntries);
104 AliGenCocktailEntry *entry;
105 //
106 // Loop over generators and initialize
107 while((entry = (AliGenCocktailEntry*)next())) {
108 entry->Generator()->Init();
109 }
110}
fe4da5cc 111
09e2e187 112 void AliGenCocktail::FinishRun()
113{
114// Initialisation
115 TIter next(fEntries);
116 AliGenCocktailEntry *entry;
117 //
118 // Loop over generators and initialize
119 while((entry = (AliGenCocktailEntry*)next())) {
120 entry->Generator()->FinishRun();
121 }
122}
123
fe4da5cc 124 void AliGenCocktail::Generate()
374924b5 125{
126//
127// Generate event
128 TIter next(fEntries);
a8408367 129 AliGenCocktailEntry *entry = 0;
130 AliGenCocktailEntry *preventry = 0;
131 AliGenerator* gen = 0;
09e2e187 132
5d12ce38 133 TObjArray *partArray = gAlice->GetMCApp()->Particles();
c8f7f6f9 134
135//
136// Generate the vertex position used by all generators
137//
138 if(fVertexSmear == kPerEvent) Vertex();
139
140
141 //
374924b5 142 // Loop over generators and generate events
143 Int_t igen=0;
a8408367 144
374924b5 145 while((entry = (AliGenCocktailEntry*)next())) {
146 igen++;
147 if (igen ==1) {
148 entry->SetFirst(0);
149 } else {
150 entry->SetFirst((partArray->GetEntriesFast())+1);
151 }
a8408367 152//
153// Handle case in which current generator needs collision geometry from previous generator
154//
155 gen = entry->Generator();
156 if (gen->NeedsCollisionGeometry())
157 {
158 if (preventry && preventry->Generator()->ProvidesCollisionGeometry())
159 {
160 gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry());
161 } else {
162 Fatal("Generate()", "No Collision Geometry Provided");
163 }
164 }
c8f7f6f9 165 entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
374924b5 166 entry->Generator()->Generate();
167 entry->SetLast(partArray->GetEntriesFast());
a8408367 168 preventry = entry;
374924b5 169 }
170 next.Reset();
374924b5 171}
fe4da5cc 172
173AliGenCocktailEntry * AliGenCocktail::FirstGenerator()
174{
374924b5 175// Iterator over generators: Initialisation
fe4da5cc 176 flnk1 = fEntries->FirstLink();
177 if (flnk1) {
178 return (AliGenCocktailEntry*) (flnk1->GetObject());
179 } else {
180 return 0;
181 }
182}
183
184AliGenCocktailEntry* AliGenCocktail::NextGenerator()
185{
374924b5 186// Iterator over generators: Increment
fe4da5cc 187 flnk1 = flnk1->Next();
188 if (flnk1) {
189 return (AliGenCocktailEntry*) (flnk1->GetObject());
190 } else {
191 return 0;
192 }
193}
194
195void AliGenCocktail::
196FirstGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
197{
374924b5 198// Iterator over generator pairs: Initialisation
fe4da5cc 199 flnk2 = flnk1 = fEntries->FirstLink();
200 if (flnk1) {
201 e2 = e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
202 } else {
203 e2= e1 = 0;
204 }
205}
206
207void AliGenCocktail::
208NextGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
209{
374924b5 210// Iterator over generators: Increment
fe4da5cc 211 flnk2 = flnk2->Next();
212 if (flnk2) {
213 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
214 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
215 } else {
216 flnk2 = flnk1 = flnk1->Next();
217 if (flnk1) {
218 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
219 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
220 } else {
221 e1=0;
222 e2=0;
223 }
224 }
225}
226
374924b5 227AliGenCocktail& AliGenCocktail::operator=(const AliGenCocktail& rhs)
228{
229// Assignment operator
198bb1c7 230 rhs.Copy(*this);
231 return (*this);
fe4da5cc 232}
233
dc1d768c 234void AliGenCocktail::Copy(TObject &) const
198bb1c7 235{
236 Fatal("Copy","Not implemented!\n");
237}
238
239
fe4da5cc 240