void gen(Int_t nev = 1,
const char* genConfig = "$ALICE_ROOT/MUON/macros/genTestConfig.C")
{
// Load libraries
// gSystem->SetIncludePath("-I$ROOTSYS/include -I$ALICE_ROOT/include -I$ALICE_ROOT");
gSystem->Load("liblhapdf"); // Parton density functions
gSystem->Load("libEGPythia6"); // TGenerator interface
gSystem->Load("libpythia6"); // Pythia
gSystem->Load("libAliPythia6"); // ALICE specific implementations
AliPDG::AddParticlesToPdgDataBase();
TDatabasePDG::Instance();
// Run loader
AliRunLoader* rl = AliRunLoader::Open("galice.root","FASTRUN","recreate");
rl->SetCompressionLevel(2);
rl->SetNumberOfEventsPerFile(nev);
rl->LoadKinematics("RECREATE");
rl->MakeTree("E");
gAlice->SetRunLoader(rl);
// Create stack
rl->MakeStack();
AliStack* stack = rl->Stack();
// Header
AliHeader* header = rl->GetHeader();
// Create and Initialize Generator
gROOT->LoadMacro(genConfig);
AliGenerator* gener = genConfig();
// Go to galice.root
rl->CdGAFile();
// Forbid some decays. Do it after gener->Init(0, because
// the initialization of the generator includes reading of the decay table.
// ...
//
// Event Loop
//
TStopwatch timer;
timer.Start();
for (Int_t iev = 0; iev < nev; iev++) {
cout <<"Event number "<< iev << endl;
// Initialize event
header->Reset(0,iev);
rl->SetEventNumber(iev);
stack->Reset();
rl->MakeTree("K");
// Generate event
stack->Reset();
stack->ConnectTree(rl->TreeK());
gener->Generate();
cout << "Number of particles " << stack->GetNprimary() << endl;
// Finish event
header->SetNprimary(stack->GetNprimary());
header->SetNtrack(stack->GetNtrack());
// I/O
stack->FinishEvent();
header->SetStack(stack);
rl->TreeE()->Fill();
rl->WriteKinematics("OVERWRITE");
} // event loop
timer.Stop();
timer.Print();
// Termination
// Generator
gener->FinishRun();
// Write file
rl->WriteHeader("OVERWRITE");
gener->Write();
rl->Write();
}
void fastGen(Tune_t tune = kPyTuneCDFA , Float_t energy, Int_t nev = 1, TString process)
{
// Add all particles to the PDG database
AliPDG::AddParticlesToPdgDataBase();
// set the random seed
TDatime date;
UInt_t seed = date.Get()+gSystem->GetPid();
gRandom->SetSeed(seed);
cout<<"Seed for random number generation= "<<seed<<endl;
// Runloader
AliRunLoader* rl = AliRunLoader::Open("galice.root", "FASTRUN","recreate");
rl->SetCompressionLevel(2);
rl->SetNumberOfEventsPerFile(nev);
rl->LoadKinematics("RECREATE");
rl->MakeTree("E");
gAlice->SetRunLoader(rl);
// Create stack
rl->MakeStack();
AliStack* stack = rl->Stack();
// Header
AliHeader* header = rl->GetHeader();
//
// Create and Initialize Generator
AliGenerator *gener = CreateGenerator(tune,energy);
gener->Init();
// if nsd switch off single diffraction
if ( process == "NSD"){
if(tune != kPhojet) {
AliPythia::Instance()-> SetMSUB(92,0); // single diffraction AB-->XB
AliPythia::Instance()-> SetMSUB(93,0); // single diffraction AB-->AX
}
else {
cout << "NSD not yet implemented in the phojet case" << endl;
exit(1);
}
}
gener->SetStack(stack);
//
// Event Loop
//
Int_t iev;
for (iev = 0; iev < nev; iev++) {
if(!(iev%500)) printf("\n \n Event number %d \n \n", iev);
// Initialize event
header->Reset(0,iev);
rl->SetEventNumber(iev);
stack->Reset();
rl->MakeTree("K");
// stack->ConnectTree();
// Generate event
gener->Generate();
// Analysis
// Int_t npart = stack->GetNprimary();
// printf("Analyse %d Particles\n", npart);
// for (Int_t part=0; part<npart; part++) {
// TParticle *MPart = stack->Particle(part);
// Int_t mpart = MPart->GetPdgCode();
// printf("Particle %d\n", mpart);
// }
// Finish event
header->SetNprimary(stack->GetNprimary());
header->SetNtrack(stack->GetNtrack());
// I/O
//
stack->FinishEvent();
header->SetStack(stack);
rl->TreeE()->Fill();
rl->WriteKinematics("OVERWRITE");
} // event loop
//
// Termination
// Generator
gener->FinishRun();
// Write file
rl->WriteHeader("OVERWRITE");
gener->Write();
rl->Write();
}