Additional initialization. Do not remove fHeader, it is done in AliRunLoader
[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()
39 :AliGenerator()
40{
374924b5 41// Constructor
8b31bfac 42 fName = "Cocktail";
43 fTitle= "Particle Generator using cocktail of generators";
2685bf00 44 flnk1 = 0;
45 flnk2 = 0;
fe4da5cc 46 fNGenerators=0;
b1403e15 47 fEntries = 0;
1ebe6dc8 48 fRandom = kFALSE;
4f85aa78 49 fHeader = 0;
fe4da5cc 50}
51
198bb1c7 52AliGenCocktail::AliGenCocktail(const AliGenCocktail & cocktail):
53 AliGenerator(cocktail)
374924b5 54{
198bb1c7 55// Copy constructor
56 cocktail.Copy(*this);
374924b5 57}
fe4da5cc 58
59AliGenCocktail::~AliGenCocktail()
60{
374924b5 61// Destructor
fe4da5cc 62 delete fEntries;
373c1a55 63 fEntries = 0;
64 // delete fHeader; // It is removed in AliRunLoader
65 fHeader = 0;
fe4da5cc 66}
67
68void AliGenCocktail::
a764b7de 69AddGenerator(AliGenerator *Generator, const char* Name, Float_t RateExp)
fe4da5cc 70{
b1403e15 71//
72// Add a generator to the list
73// First check that list exists
74 if (!fEntries) fEntries = new TList();
75
fe4da5cc 76//
77// Forward parameters to the new generator
212bcf04 78 if(TestBit(kPtRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange)))
79 Generator->SetPtRange(fPtMin,fPtMax);
80 if(TestBit(kMomentumRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange)))
81 Generator->SetMomentumRange(fPMin,fPMax);
82
83 if (!(Generator->TestBit(kYRange)))
84 Generator->SetYRange(fYMin,fYMax);
85 if (!(Generator->TestBit(kPhiRange)))
86 Generator->SetPhiRange(fPhiMin*180/TMath::Pi(),fPhiMax*180/TMath::Pi());
87 if (!(Generator->TestBit(kThetaRange)))
88 Generator->SetThetaRange(fThetaMin*180/TMath::Pi(),fThetaMax*180/TMath::Pi());
89 if (!(Generator->TestBit(kVertexRange)))
90 Generator->SetOrigin(fOrigin[0], fOrigin[1], fOrigin[2]);
c8f7f6f9 91
92 Generator->SetSigma(fOsigma[0], fOsigma[1], fOsigma[2]);
7a50a130 93 Generator->SetVertexSmear(fVertexSmear);
c8f7f6f9 94 Generator->SetVertexSource(kContainer);
95 Generator->SetTrackingFlag(fTrackIt);
4f85aa78 96 Generator->SetContainer(this);
97
c97002cc 98
fe4da5cc 99//
100// Add generator to list
c5c3e4b0 101 char theName[256];
102 sprintf(theName, "%s_%d",Name, fNGenerators);
103 Generator->SetName(theName);
104
374924b5 105 AliGenCocktailEntry *entry =
fe4da5cc 106 new AliGenCocktailEntry(Generator, Name, RateExp);
c5c3e4b0 107
374924b5 108 fEntries->Add(entry);
fe4da5cc 109 fNGenerators++;
373c1a55 110 flnk1 = 0;
111 flnk2 = 0;
112 fRandom = kFALSE;
113 fHeader = 0;
114}
fe4da5cc 115
116 void AliGenCocktail::Init()
374924b5 117{
118// Initialisation
119 TIter next(fEntries);
120 AliGenCocktailEntry *entry;
121 //
122 // Loop over generators and initialize
123 while((entry = (AliGenCocktailEntry*)next())) {
c97002cc 124 if (fStack) entry->Generator()->SetStack(fStack);
374924b5 125 entry->Generator()->Init();
126 }
1ebe6dc8 127
128 next.Reset();
129
130 if (fRandom) {
131 fProb.Set(fNGenerators);
132 next.Reset();
133 Float_t sum = 0.;
134 while((entry = (AliGenCocktailEntry*)next())) {
135 sum += entry->Rate();
136 }
137
138 next.Reset();
139 Int_t i = 0;
140 Float_t psum = 0.;
141 while((entry = (AliGenCocktailEntry*)next())) {
142 psum += entry->Rate() / sum;
143 fProb[i++] = psum;
144 }
145 }
146 next.Reset();
374924b5 147}
fe4da5cc 148
09e2e187 149 void AliGenCocktail::FinishRun()
150{
151// Initialisation
152 TIter next(fEntries);
153 AliGenCocktailEntry *entry;
154 //
155 // Loop over generators and initialize
156 while((entry = (AliGenCocktailEntry*)next())) {
157 entry->Generator()->FinishRun();
158 }
159}
160
fe4da5cc 161 void AliGenCocktail::Generate()
374924b5 162{
163//
164// Generate event
165 TIter next(fEntries);
a8408367 166 AliGenCocktailEntry *entry = 0;
167 AliGenCocktailEntry *preventry = 0;
168 AliGenerator* gen = 0;
4f85aa78 169 if (fHeader) delete fHeader;
170 fHeader = new AliGenCocktailEventHeader("Cocktail Header");
09e2e187 171
5d12ce38 172 TObjArray *partArray = gAlice->GetMCApp()->Particles();
c8f7f6f9 173
174//
175// Generate the vertex position used by all generators
176//
177 if(fVertexSmear == kPerEvent) Vertex();
178
67db3ff2 179 TArrayF eventVertex;
180 eventVertex.Set(3);
181 for (Int_t j=0; j < 3; j++) eventVertex[j] = fVertex[j];
182
1ebe6dc8 183 if (!fRandom) {
184 //
185 // Loop over generators and generate events
186 Int_t igen=0;
187
188 while((entry = (AliGenCocktailEntry*)next())) {
189 igen++;
190 if (igen ==1) {
191 entry->SetFirst(0);
192 } else {
193 entry->SetFirst((partArray->GetEntriesFast())+1);
194 }
a8408367 195//
196// Handle case in which current generator needs collision geometry from previous generator
197//
1ebe6dc8 198 gen = entry->Generator();
199 if (gen->NeedsCollisionGeometry())
a8408367 200 {
1ebe6dc8 201 if (preventry && preventry->Generator()->ProvidesCollisionGeometry())
202 {
203 gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry());
204 } else {
205 Fatal("Generate()", "No Collision Geometry Provided");
206 }
a8408367 207 }
1ebe6dc8 208 entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
209 entry->Generator()->Generate();
210 entry->SetLast(partArray->GetEntriesFast());
211 preventry = entry;
212 }
213 } else {
214 //
215 // Select a generator randomly
216 //
217 Int_t i;
218 Float_t p0 = gRandom->Rndm();
219
220 for (i = 0; i < fNGenerators; i++) {
221 if (p0 < fProb[i]) break;
a8408367 222 }
1ebe6dc8 223
224 entry = (AliGenCocktailEntry*) fEntries->At(i);
225 entry->SetFirst(0);
226 gen = entry->Generator();
c8f7f6f9 227 entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
374924b5 228 entry->Generator()->Generate();
229 entry->SetLast(partArray->GetEntriesFast());
1ebe6dc8 230 }
231
232
374924b5 233 next.Reset();
4f85aa78 234
67db3ff2 235// Event Vertex
4f85aa78 236 fHeader->SetPrimaryVertex(eventVertex);
237 gAlice->SetGenEventHeader(fHeader);
374924b5 238}
fe4da5cc 239
c44d1c08 240void AliGenCocktail::SetVertexSmear(VertexSmear_t smear)
241{
242// Set vertex smearing and propagate it to the generators
243
244 AliGenerator::SetVertexSmear(smear);
245 TIter next(fEntries);
246 while (AliGenCocktailEntry* entry = (AliGenCocktailEntry*)next()) {
247 entry->Generator()->SetVertexSmear(smear);
248 }
249}
250
fe4da5cc 251AliGenCocktailEntry * AliGenCocktail::FirstGenerator()
252{
374924b5 253// Iterator over generators: Initialisation
fe4da5cc 254 flnk1 = fEntries->FirstLink();
255 if (flnk1) {
256 return (AliGenCocktailEntry*) (flnk1->GetObject());
257 } else {
258 return 0;
259 }
260}
261
262AliGenCocktailEntry* AliGenCocktail::NextGenerator()
263{
374924b5 264// Iterator over generators: Increment
fe4da5cc 265 flnk1 = flnk1->Next();
266 if (flnk1) {
267 return (AliGenCocktailEntry*) (flnk1->GetObject());
268 } else {
269 return 0;
270 }
271}
272
273void AliGenCocktail::
274FirstGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
275{
374924b5 276// Iterator over generator pairs: Initialisation
fe4da5cc 277 flnk2 = flnk1 = fEntries->FirstLink();
278 if (flnk1) {
279 e2 = e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
280 } else {
281 e2= e1 = 0;
282 }
283}
284
285void AliGenCocktail::
286NextGeneratorPair(AliGenCocktailEntry*& e1, AliGenCocktailEntry*& e2)
287{
374924b5 288// Iterator over generators: Increment
fe4da5cc 289 flnk2 = flnk2->Next();
290 if (flnk2) {
291 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
292 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
293 } else {
294 flnk2 = flnk1 = flnk1->Next();
295 if (flnk1) {
296 e1 = (AliGenCocktailEntry*) (flnk1->GetObject());
297 e2 = (AliGenCocktailEntry*) (flnk2->GetObject());
298 } else {
299 e1=0;
300 e2=0;
301 }
302 }
303}
304
4f85aa78 305void AliGenCocktail::AddHeader(AliGenEventHeader* header)
306{
307// Add a header to the list
308 if (fHeader) fHeader->AddHeader(header);
309}
310
374924b5 311AliGenCocktail& AliGenCocktail::operator=(const AliGenCocktail& rhs)
312{
313// Assignment operator
198bb1c7 314 rhs.Copy(*this);
315 return (*this);
fe4da5cc 316}
317
dc1d768c 318void AliGenCocktail::Copy(TObject &) const
198bb1c7 319{
320 Fatal("Copy","Not implemented!\n");
321}
322
323
fe4da5cc 324