Wrongly deleted code is restored
[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"
4f85aa78 34#include "AliGenCocktailEventHeader.h"
fe4da5cc 35
36ClassImp(AliGenCocktail)
37
38AliGenCocktail::AliGenCocktail()
1c56e311 39 :AliGenerator(),
40 fNGenerators(0),
41 fRandom(kFALSE),
42 fUsePerEventRate(kFALSE),
43 fProb(0),
44 fEntries(0),
45 flnk1(0),
46 flnk2(0),
47 fHeader(0)
fe4da5cc 48{
374924b5 49// Constructor
8b31bfac 50 fName = "Cocktail";
51 fTitle= "Particle Generator using cocktail of generators";
fe4da5cc 52}
53
fe4da5cc 54AliGenCocktail::~AliGenCocktail()
55{
374924b5 56// Destructor
fe4da5cc 57 delete fEntries;
373c1a55 58 fEntries = 0;
59 // delete fHeader; // It is removed in AliRunLoader
60 fHeader = 0;
fe4da5cc 61}
62
63void AliGenCocktail::
a764b7de 64AddGenerator(AliGenerator *Generator, const 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);
4f85aa78 91 Generator->SetContainer(this);
92
c97002cc 93
fe4da5cc 94//
95// Add generator to list
c5c3e4b0 96 char theName[256];
97 sprintf(theName, "%s_%d",Name, fNGenerators);
98 Generator->SetName(theName);
99
374924b5 100 AliGenCocktailEntry *entry =
fe4da5cc 101 new AliGenCocktailEntry(Generator, Name, RateExp);
c5c3e4b0 102
374924b5 103 fEntries->Add(entry);
fe4da5cc 104 fNGenerators++;
373c1a55 105 flnk1 = 0;
106 flnk2 = 0;
107 fRandom = kFALSE;
108 fHeader = 0;
109}
fe4da5cc 110
111 void AliGenCocktail::Init()
374924b5 112{
113// Initialisation
114 TIter next(fEntries);
115 AliGenCocktailEntry *entry;
116 //
117 // Loop over generators and initialize
118 while((entry = (AliGenCocktailEntry*)next())) {
c97002cc 119 if (fStack) entry->Generator()->SetStack(fStack);
374924b5 120 entry->Generator()->Init();
121 }
1ebe6dc8 122
123 next.Reset();
124
125 if (fRandom) {
126 fProb.Set(fNGenerators);
127 next.Reset();
128 Float_t sum = 0.;
129 while((entry = (AliGenCocktailEntry*)next())) {
130 sum += entry->Rate();
131 }
132
133 next.Reset();
134 Int_t i = 0;
135 Float_t psum = 0.;
136 while((entry = (AliGenCocktailEntry*)next())) {
137 psum += entry->Rate() / sum;
138 fProb[i++] = psum;
139 }
140 }
141 next.Reset();
374924b5 142}
fe4da5cc 143
09e2e187 144 void AliGenCocktail::FinishRun()
145{
146// Initialisation
147 TIter next(fEntries);
148 AliGenCocktailEntry *entry;
149 //
150 // Loop over generators and initialize
151 while((entry = (AliGenCocktailEntry*)next())) {
152 entry->Generator()->FinishRun();
153 }
154}
155
fe4da5cc 156 void AliGenCocktail::Generate()
374924b5 157{
158//
159// Generate event
160 TIter next(fEntries);
a8408367 161 AliGenCocktailEntry *entry = 0;
162 AliGenCocktailEntry *preventry = 0;
163 AliGenerator* gen = 0;
4f85aa78 164 if (fHeader) delete fHeader;
c89fc3f1 165
166
4f85aa78 167 fHeader = new AliGenCocktailEventHeader("Cocktail Header");
09e2e187 168
5d12ce38 169 TObjArray *partArray = gAlice->GetMCApp()->Particles();
c8f7f6f9 170
171//
172// Generate the vertex position used by all generators
173//
174 if(fVertexSmear == kPerEvent) Vertex();
175
67db3ff2 176 TArrayF eventVertex;
177 eventVertex.Set(3);
178 for (Int_t j=0; j < 3; j++) eventVertex[j] = fVertex[j];
179
1ebe6dc8 180 if (!fRandom) {
181 //
182 // Loop over generators and generate events
183 Int_t igen=0;
1ebe6dc8 184 while((entry = (AliGenCocktailEntry*)next())) {
c89fc3f1 185 if (fUsePerEventRate && (gRandom->Rndm() > entry->Rate())) continue;
186
1ebe6dc8 187 igen++;
188 if (igen ==1) {
189 entry->SetFirst(0);
190 } else {
191 entry->SetFirst((partArray->GetEntriesFast())+1);
192 }
a8408367 193//
194// Handle case in which current generator needs collision geometry from previous generator
195//
1ebe6dc8 196 gen = entry->Generator();
197 if (gen->NeedsCollisionGeometry())
a8408367 198 {
1ebe6dc8 199 if (preventry && preventry->Generator()->ProvidesCollisionGeometry())
200 {
201 gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry());
202 } else {
203 Fatal("Generate()", "No Collision Geometry Provided");
204 }
a8408367 205 }
1ebe6dc8 206 entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
207 entry->Generator()->Generate();
208 entry->SetLast(partArray->GetEntriesFast());
209 preventry = entry;
210 }
c89fc3f1 211 } else if (fRandom) {
1ebe6dc8 212 //
213 // Select a generator randomly
214 //
215 Int_t i;
216 Float_t p0 = gRandom->Rndm();
217
218 for (i = 0; i < fNGenerators; i++) {
219 if (p0 < fProb[i]) break;
a8408367 220 }
1ebe6dc8 221
222 entry = (AliGenCocktailEntry*) fEntries->At(i);
223 entry->SetFirst(0);
224 gen = entry->Generator();
c8f7f6f9 225 entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
374924b5 226 entry->Generator()->Generate();
227 entry->SetLast(partArray->GetEntriesFast());
c89fc3f1 228 }
1ebe6dc8 229
374924b5 230 next.Reset();
4f85aa78 231
67db3ff2 232// Event Vertex
4f85aa78 233 fHeader->SetPrimaryVertex(eventVertex);
234 gAlice->SetGenEventHeader(fHeader);
374924b5 235}
fe4da5cc 236
c44d1c08 237void AliGenCocktail::SetVertexSmear(VertexSmear_t smear)
238{
239// Set vertex smearing and propagate it to the generators
240
241 AliGenerator::SetVertexSmear(smear);
242 TIter next(fEntries);
243 while (AliGenCocktailEntry* entry = (AliGenCocktailEntry*)next()) {
244 entry->Generator()->SetVertexSmear(smear);
245 }
246}
247
fe4da5cc 248AliGenCocktailEntry * AliGenCocktail::FirstGenerator()
249{
374924b5 250// Iterator over generators: Initialisation
fe4da5cc 251 flnk1 = fEntries->FirstLink();
252 if (flnk1) {
253 return (AliGenCocktailEntry*) (flnk1->GetObject());
254 } else {
255 return 0;
256 }
257}
258
259AliGenCocktailEntry* AliGenCocktail::NextGenerator()
260{
374924b5 261// Iterator over generators: Increment
fe4da5cc 262 flnk1 = flnk1->Next();
263 if (flnk1) {
264 return (AliGenCocktailEntry*) (flnk1->GetObject());
265 } else {
266 return 0;
267 }
268}
269
270void AliGenCocktail::
271FirstGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
272{
374924b5 273// Iterator over generator pairs: Initialisation
fe4da5cc 274 flnk2 = flnk1 = fEntries->FirstLink();
275 if (flnk1) {
276 e2 = e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
277 } else {
278 e2= e1 = 0;
279 }
280}
281
282void AliGenCocktail::
283NextGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
284{
374924b5 285// Iterator over generators: Increment
fe4da5cc 286 flnk2 = flnk2->Next();
287 if (flnk2) {
288 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
289 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
290 } else {
291 flnk2 = flnk1 = flnk1->Next();
292 if (flnk1) {
293 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
294 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
295 } else {
296 e1=0;
297 e2=0;
298 }
299 }
300}
301
4f85aa78 302void AliGenCocktail::AddHeader(AliGenEventHeader* header)
303{
304// Add a header to the list
305 if (fHeader) fHeader->AddHeader(header);
306}
fe4da5cc 307
198bb1c7 308
309
fe4da5cc 310