* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.7 2000/10/02 15:15:41 morsch
-Use default streamer for AliGenCocktail
+/* $Id$ */
-Revision 1.6 2000/09/07 17:04:31 morsch
-In Streamer: TIter() after R__b << fEntries (Dmitri Yurevitch Peressounko)
-
-Revision 1.5 2000/06/09 20:28:51 morsch
-All coding rule violations except RS3 corrected (AM)
-
-Revision 1.4 1999/09/29 09:24:12 fca
-Introduction of the Copyright and cvs Log
+// Container class for AliGenerator through recursion.
+// Container is itself an AliGenerator.
+// What is stored are not the pointers to the generators directly but to objects of type
+// AliGenCocktail entry.
+// The class provides also iterator functionality.
+// Author: andreas.morsch@cern.ch
+//
-*/
+#include <TList.h>
+#include <TObjArray.h>
+#include <TFormula.h>
#include "AliGenCocktail.h"
#include "AliGenCocktailEntry.h"
+#include "AliCollisionGeometry.h"
#include "AliRun.h"
+#include "AliLog.h"
+#include "AliMC.h"
+#include "AliGenCocktailEventHeader.h"
ClassImp(AliGenCocktail)
AliGenCocktail::AliGenCocktail()
- :AliGenerator()
+ :AliGenerator(),
+ fNGenerators(0),
+ fTotalRate(0.),
+ fRandom(kFALSE),
+ fUsePerEventRate(kFALSE),
+ fProb(0),
+ fEntries(0),
+ flnk1(0),
+ flnk2(0),
+ fHeader(0)
{
// Constructor
- fEntries = new TList;
- fNGenerators=0;
-}
-
-AliGenCocktail::AliGenCocktail(const AliGenCocktail & cocktail)
-{
-// copy constructor
+ fName = "Cocktail";
+ fTitle= "Particle Generator using cocktail of generators";
}
AliGenCocktail::~AliGenCocktail()
{
// Destructor
delete fEntries;
+ fEntries = 0;
+ // delete fHeader; // It is removed in AliRunLoader
+ fHeader = 0;
}
void AliGenCocktail::
-AddGenerator(AliGenerator *Generator, char* Name, Float_t RateExp)
+AddGenerator(AliGenerator *Generator, const char* Name, Float_t RateExp, TFormula* formula)
{
//
+// Add a generator to the list
+// First check that list exists
+ if (!fEntries) fEntries = new TList();
+ fTotalRate += RateExp;
+//
// Forward parameters to the new generator
- if(TestBit(kPtRange))
- Generator->SetPtRange(fPtMin,fPtMax);
- if(TestBit(kMomentumRange))
- Generator->SetMomentumRange(fPMin,fPMax);
-
- Generator->SetYRange(fYMin,fYMax);
- Generator->
- SetPhiRange(fPhiMin*180/TMath::Pi(),fPhiMax*180/TMath::Pi());
- Generator->
- SetThetaRange(fThetaMin*180/TMath::Pi(),fThetaMax*180/TMath::Pi());
- Generator->
- SetOrigin(fOrigin[0], fOrigin[1], fOrigin[2]);
- Generator->
- SetSigma(fOsigma[0], fOsigma[1], fOsigma[2]);
- Generator->SetVertexSmear(fVertexSmear);
- Generator->SetTrackingFlag(fTrackIt);
+ if(TestBit(kPtRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange)))
+ Generator->SetPtRange(fPtMin,fPtMax);
+ if(TestBit(kMomentumRange) && !(Generator->TestBit(kPtRange)) && !(Generator->TestBit(kMomentumRange)))
+ Generator->SetMomentumRange(fPMin,fPMax);
+
+ if (!(Generator->TestBit(kYRange)))
+ Generator->SetYRange(fYMin,fYMax);
+ if (!(Generator->TestBit(kPhiRange)))
+ Generator->SetPhiRange(fPhiMin*180/TMath::Pi(),fPhiMax*180/TMath::Pi());
+ if (!(Generator->TestBit(kThetaRange)))
+ Generator->SetThetaRange(fThetaMin*180/TMath::Pi(),fThetaMax*180/TMath::Pi());
+ if (!(Generator->TestBit(kVertexRange))) {
+ Generator->SetOrigin(fOrigin[0], fOrigin[1], fOrigin[2]);
+ Generator->SetSigma(fOsigma[0], fOsigma[1], fOsigma[2]);
+ Generator->SetVertexSmear(fVertexSmear);
+ Generator->SetVertexSource(kContainer);
+ }
+ Generator->SetTrackingFlag(fTrackIt);
+ Generator->SetContainer(this);
+
+
//
// Add generator to list
-
+ char theName[256];
+ snprintf(theName, 256, "%s_%d",Name, fNGenerators);
+ Generator->SetName(theName);
+
AliGenCocktailEntry *entry =
new AliGenCocktailEntry(Generator, Name, RateExp);
+ if (formula) entry->SetFormula(formula);
fEntries->Add(entry);
fNGenerators++;
- }
+ flnk1 = 0;
+ flnk2 = 0;
+ fRandom = kFALSE;
+ fHeader = 0;
+}
void AliGenCocktail::Init()
{
//
// Loop over generators and initialize
while((entry = (AliGenCocktailEntry*)next())) {
+ if (fStack) entry->Generator()->SetStack(fStack);
entry->Generator()->Init();
}
+
+ next.Reset();
+
+ if (fRandom) {
+ fProb.Set(fNGenerators);
+ next.Reset();
+ Float_t sum = 0.;
+ while((entry = (AliGenCocktailEntry*)next())) {
+ sum += entry->Rate();
+ }
+
+ next.Reset();
+ Int_t i = 0;
+ Float_t psum = 0.;
+ while((entry = (AliGenCocktailEntry*)next())) {
+ psum += entry->Rate() / sum;
+ fProb[i++] = psum;
+ }
+ }
+ next.Reset();
+}
+
+ void AliGenCocktail::FinishRun()
+{
+// Initialisation
+ TIter next(fEntries);
+ AliGenCocktailEntry *entry;
+ //
+ // Loop over generators and initialize
+ while((entry = (AliGenCocktailEntry*)next())) {
+ entry->Generator()->FinishRun();
+ }
}
void AliGenCocktail::Generate()
//
// Generate event
TIter next(fEntries);
- AliGenCocktailEntry *entry;
- AliGenCocktailEntry *e1;
- AliGenCocktailEntry *e2;
- TClonesArray *partArray = gAlice->Particles();
- //
- // Loop over generators and generate events
- Int_t igen=0;
- while((entry = (AliGenCocktailEntry*)next())) {
- igen++;
- if (igen ==1) {
+ AliGenCocktailEntry *entry = 0;
+ AliGenCocktailEntry *preventry = 0;
+ AliGenCocktailEntry *collentry = 0;
+ AliGenerator* gen = 0;
+ if (fHeader) delete fHeader;
+
+
+ fHeader = new AliGenCocktailEventHeader("Cocktail Header");
+
+ const TObjArray *partArray = gAlice->GetMCApp()->Particles();
+
+//
+// Generate the vertex position used by all generators
+//
+ if(fVertexSmear == kPerEvent) Vertex();
+
+ TArrayF eventVertex;
+ eventVertex.Set(3);
+ for (Int_t j=0; j < 3; j++) eventVertex[j] = fVertex[j];
+
+ if (!fRandom) {
+ //
+ // Loop over generators and generate events
+ Int_t igen = 0;
+ Int_t ntimes = 1;
+ while((entry = (AliGenCocktailEntry*)next())) {
+ if (fUsePerEventRate && (gRandom->Rndm() > entry->Rate())) continue;
+
+ igen++;
+ if (igen ==1) {
entry->SetFirst(0);
- } else {
+ } else {
entry->SetFirst((partArray->GetEntriesFast())+1);
+ }
+ gen = entry->Generator();
+ if (gen->ProvidesCollisionGeometry()) collentry = entry;
+ //
+ // Handle case in which current generator needs collision geometry from previous generator
+ //
+ if (gen->NeedsCollisionGeometry() && (entry->Formula() == 0))
+ {
+ if (preventry && preventry->Generator()->ProvidesCollisionGeometry())
+ {
+ gen->SetCollisionGeometry(preventry->Generator()->CollisionGeometry());
+ } else {
+ Fatal("Generate()", "No Collision Geometry Provided");
+ }
+ }
+ //
+ // Number of signals is calculated from Collision Geometry
+ //
+ if (entry->Formula() != 0)
+ {
+ if (!collentry) {
+ Fatal("Generate()", "No Collision Geometry Provided");
+ return;
+ }
+ AliCollisionGeometry* coll = (collentry->Generator())->CollisionGeometry();
+ Float_t b = coll->ImpactParameter();
+ Int_t nsig = Int_t(entry->Formula()->Eval(b));
+ if (nsig < 1) nsig = 1;
+ AliInfo(Form("Signal Events %13.3f %5d %5d\n", b, coll->HardScatters(), nsig));
+ ntimes = nsig;
+ }
+
+ entry->Generator()->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
+ for (Int_t i = 0; i < ntimes; i++) entry->Generator()->Generate();
+ entry->SetLast(partArray->GetEntriesFast());
+ preventry = entry;
}
- entry->Generator()->Generate();
+ } else if (fRandom) {
+ //
+ // Select a generator randomly
+ //
+ Int_t i;
+ Float_t p0 = gRandom->Rndm();
+
+ for (i = 0; i < fNGenerators; i++) {
+ if (p0 < fProb[i]) break;
+ }
+
+ entry = (AliGenCocktailEntry*) fEntries->At(i);
+ entry->SetFirst(0);
+ gen = entry->Generator();
+ gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
+ gen->Generate();
entry->SetLast(partArray->GetEntriesFast());
- }
+ }
+
next.Reset();
- while((entry = (AliGenCocktailEntry*)next())) {
- entry->PrintInfo();
- }
- for (entry=FirstGenerator();
- entry;
- entry=NextGenerator()
- ) {
- entry->PrintInfo();
- }
- for (FirstGeneratorPair(e1,e2);
- (e1&&e2);
- NextGeneratorPair(e1,e2)
- ){
- printf("\n -----------------------------");
- e1->PrintInfo();
- e2->PrintInfo();
- }
+
+// Event Vertex
+ fHeader->SetPrimaryVertex(eventVertex);
+ fHeader->CalcNProduced();
+ gAlice->SetGenEventHeader(fHeader);
+}
+
+void AliGenCocktail::SetVertexSmear(VertexSmear_t smear)
+{
+// Set vertex smearing and propagate it to the generators
+
+ AliGenerator::SetVertexSmear(smear);
+ TIter next(fEntries);
+ while (AliGenCocktailEntry* entry = (AliGenCocktailEntry*)next()) {
+ entry->Generator()->SetVertexSmear(smear);
+ }
}
AliGenCocktailEntry * AliGenCocktail::FirstGenerator()
}
}
-/*
-void AliGenCocktail::Streamer(TBuffer &R__b)
+void AliGenCocktail::AddHeader(AliGenEventHeader* header)
{
- // Stream an object of class AliGenCocktail.
-
- AliGenCocktailEntry *entry;
-
- if (R__b.IsReading()) {
- Version_t R__v = R__b.ReadVersion(); if (R__v) { }
- AliGenerator::Streamer(R__b);
- R__b >> fNGenerators;
- R__b >> fEntries;
- TIter next(fEntries);
-// Stream generation related information
- while((entry = (AliGenCocktailEntry*)next())) {
- entry->Streamer(R__b);
- }
- } else {
- R__b.WriteVersion(AliGenCocktail::IsA());
- AliGenerator::Streamer(R__b);
- R__b << fNGenerators;
- R__b << fEntries;
- TIter next(fEntries);
-// Stream generation related information
- while((entry = (AliGenCocktailEntry*)next())) {
- entry->Streamer(R__b);
- }
- }
+// Add a header to the list
+ if (fHeader) fHeader->AddHeader(header);
}
-*/
-AliGenCocktail& AliGenCocktail::operator=(const AliGenCocktail& rhs)
-{
-// Assignment operator
- return *this;
-}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff