Declaring some methods constant.
[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
16/*
17$Log$
116cbefd 18Revision 1.15 2003/01/07 14:13:22 morsch
19Communication between generators provising and requesting collision
20geometries.
21
a8408367 22Revision 1.14 2002/02/08 16:50:50 morsch
23Add name and title in constructor.
24
8b31bfac 25Revision 1.13 2001/10/21 18:35:56 hristov
26Several pointers were set to zero in the default constructors to avoid memory management problems
27
2685bf00 28Revision 1.12 2001/06/18 13:07:30 morsch
29Forward kinematic ranges to entries only if not set by user.
30
212bcf04 31Revision 1.11 2001/01/30 09:23:12 hristov
32Streamers removed (R.Brun)
33
a8a6107b 34Revision 1.10 2001/01/26 19:55:49 hristov
35Major upgrade of AliRoot code
36
2ab0c725 37Revision 1.9 2000/12/21 16:24:06 morsch
38Coding convention clean-up
39
675e9664 40Revision 1.8 2000/10/27 13:53:29 morsch
41AddGenerator: check testbit before setting the pT and momentum range
42(D.Y. Peressounko)
43
699cb625 44Revision 1.7 2000/10/02 15:15:41 morsch
45Use default streamer for AliGenCocktail
46
a436e7fc 47Revision 1.6 2000/09/07 17:04:31 morsch
48In Streamer: TIter() after R__b << fEntries (Dmitri Yurevitch Peressounko)
49
e6e2a20e 50Revision 1.5 2000/06/09 20:28:51 morsch
51All coding rule violations except RS3 corrected (AM)
52
374924b5 53Revision 1.4 1999/09/29 09:24:12 fca
54Introduction of the Copyright and cvs Log
55
4c039060 56*/
57
675e9664 58// Container class for AliGenerator through recursion.
59// Container is itself an AliGenerator.
60// What is stored are not the pointers to the generators directly but to objects of type
61// AliGenCocktail entry.
62// The class provides also iterator functionality.
63// Author: andreas.morsch@cern.ch
64//
65
116cbefd 66#include <TList.h>
67#include <TObjArray.h>
68
fe4da5cc 69#include "AliGenCocktail.h"
374924b5 70#include "AliGenCocktailEntry.h"
fe4da5cc 71#include "AliRun.h"
fe4da5cc 72
73ClassImp(AliGenCocktail)
74
75AliGenCocktail::AliGenCocktail()
76 :AliGenerator()
77{
374924b5 78// Constructor
8b31bfac 79 fName = "Cocktail";
80 fTitle= "Particle Generator using cocktail of generators";
fe4da5cc 81 fEntries = new TList;
2685bf00 82 flnk1 = 0;
83 flnk2 = 0;
fe4da5cc 84 fNGenerators=0;
85}
86
374924b5 87AliGenCocktail::AliGenCocktail(const AliGenCocktail & cocktail)
88{
89// copy constructor
90}
fe4da5cc 91
92AliGenCocktail::~AliGenCocktail()
93{
374924b5 94// Destructor
fe4da5cc 95 delete fEntries;
96}
97
98void AliGenCocktail::
a436e7fc 99AddGenerator(AliGenerator *Generator, char* Name, Float_t RateExp)
fe4da5cc 100{
101//
102// Forward parameters to the new generator
212bcf04 103 if(TestBit(kPtRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange)))
104 Generator->SetPtRange(fPtMin,fPtMax);
105 if(TestBit(kMomentumRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange)))
106 Generator->SetMomentumRange(fPMin,fPMax);
107
108 if (!(Generator->TestBit(kYRange)))
109 Generator->SetYRange(fYMin,fYMax);
110 if (!(Generator->TestBit(kPhiRange)))
111 Generator->SetPhiRange(fPhiMin*180/TMath::Pi(),fPhiMax*180/TMath::Pi());
112 if (!(Generator->TestBit(kThetaRange)))
113 Generator->SetThetaRange(fThetaMin*180/TMath::Pi(),fThetaMax*180/TMath::Pi());
114 if (!(Generator->TestBit(kVertexRange)))
115 Generator->SetOrigin(fOrigin[0], fOrigin[1], fOrigin[2]);
fe4da5cc 116 Generator->
117 SetSigma(fOsigma[0], fOsigma[1], fOsigma[2]);
7a50a130 118 Generator->SetVertexSmear(fVertexSmear);
119 Generator->SetTrackingFlag(fTrackIt);
fe4da5cc 120//
121// Add generator to list
a436e7fc 122
374924b5 123 AliGenCocktailEntry *entry =
fe4da5cc 124 new AliGenCocktailEntry(Generator, Name, RateExp);
374924b5 125 fEntries->Add(entry);
fe4da5cc 126 fNGenerators++;
127 }
128
129 void AliGenCocktail::Init()
374924b5 130{
131// Initialisation
132 TIter next(fEntries);
133 AliGenCocktailEntry *entry;
134 //
135 // Loop over generators and initialize
136 while((entry = (AliGenCocktailEntry*)next())) {
137 entry->Generator()->Init();
138 }
139}
fe4da5cc 140
141 void AliGenCocktail::Generate()
374924b5 142{
143//
144// Generate event
145 TIter next(fEntries);
a8408367 146 AliGenCocktailEntry *entry = 0;
147 AliGenCocktailEntry *preventry = 0;
148 AliGenerator* gen = 0;
149
150// AliGenCocktailEntry *e1;
151// AliGenCocktailEntry *e2;
2ab0c725 152 TObjArray *partArray = gAlice->Particles();
374924b5 153 //
154 // Loop over generators and generate events
155 Int_t igen=0;
a8408367 156
374924b5 157 while((entry = (AliGenCocktailEntry*)next())) {
158 igen++;
159 if (igen ==1) {
160 entry->SetFirst(0);
161 } else {
162 entry->SetFirst((partArray->GetEntriesFast())+1);
163 }
a8408367 164//
165// Handle case in which current generator needs collision geometry from previous generator
166//
167 gen = entry->Generator();
168 if (gen->NeedsCollisionGeometry())
169 {
170 if (preventry && preventry->Generator()->ProvidesCollisionGeometry())
171 {
172 gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry());
173 } else {
174 Fatal("Generate()", "No Collision Geometry Provided");
175 }
176 }
177
374924b5 178 entry->Generator()->Generate();
179 entry->SetLast(partArray->GetEntriesFast());
a8408367 180 preventry = entry;
374924b5 181 }
182 next.Reset();
a8408367 183/*
374924b5 184 while((entry = (AliGenCocktailEntry*)next())) {
185 entry->PrintInfo();
186 }
187 for (entry=FirstGenerator();
188 entry;
189 entry=NextGenerator()
190 ) {
191 entry->PrintInfo();
192 }
193 for (FirstGeneratorPair(e1,e2);
194 (e1&&e2);
195 NextGeneratorPair(e1,e2)
196 ){
197 printf("\n -----------------------------");
198 e1->PrintInfo();
199 e2->PrintInfo();
200 }
a8408367 201*/
374924b5 202}
fe4da5cc 203
204AliGenCocktailEntry * AliGenCocktail::FirstGenerator()
205{
374924b5 206// Iterator over generators: Initialisation
fe4da5cc 207 flnk1 = fEntries->FirstLink();
208 if (flnk1) {
209 return (AliGenCocktailEntry*) (flnk1->GetObject());
210 } else {
211 return 0;
212 }
213}
214
215AliGenCocktailEntry* AliGenCocktail::NextGenerator()
216{
374924b5 217// Iterator over generators: Increment
fe4da5cc 218 flnk1 = flnk1->Next();
219 if (flnk1) {
220 return (AliGenCocktailEntry*) (flnk1->GetObject());
221 } else {
222 return 0;
223 }
224}
225
226void AliGenCocktail::
227FirstGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
228{
374924b5 229// Iterator over generator pairs: Initialisation
fe4da5cc 230 flnk2 = flnk1 = fEntries->FirstLink();
231 if (flnk1) {
232 e2 = e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
233 } else {
234 e2= e1 = 0;
235 }
236}
237
238void AliGenCocktail::
239NextGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
240{
374924b5 241// Iterator over generators: Increment
fe4da5cc 242 flnk2 = flnk2->Next();
243 if (flnk2) {
244 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
245 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
246 } else {
247 flnk2 = flnk1 = flnk1->Next();
248 if (flnk1) {
249 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
250 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
251 } else {
252 e1=0;
253 e2=0;
254 }
255 }
256}
257
374924b5 258AliGenCocktail& AliGenCocktail::operator=(const AliGenCocktail& rhs)
259{
260// Assignment operator
261 return *this;
fe4da5cc 262}
263
264