RE01/src/RE01PrimaryGeneratorAction.cc

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0025 //
0026 /// \file RE01PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the RE01PrimaryGeneratorAction class
0028
0029 #include "RE01PrimaryGeneratorAction.hh"
0030
0031 #include "RE01PrimaryGeneratorMessenger.hh"
0032
0033 #include "G4Event.hh"
0034 #include "G4HEPEvtInterface.hh"
0035 #include "G4ParticleDefinition.hh"
0036 #include "G4ParticleGun.hh"
0037 #include "G4ParticleTable.hh"
0038 #include "G4SystemOfUnits.hh"
0039
0040 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0041 RE01PrimaryGeneratorAction::RE01PrimaryGeneratorAction()
0042   : G4VUserPrimaryGeneratorAction(), fHEPEvt(0), fParticleGun(0), fMessenger(0)
0043 {
0044   const char* filename = "pythia_event.data";
0045   fHEPEvt = new G4HEPEvtInterface(filename);
0046
0047   G4int n_particle = 1;
0048   G4ParticleGun* particleGun = new G4ParticleGun(n_particle);
0049   G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
0050   G4String particleName;
0051   G4ParticleDefinition* particle = particleTable->FindParticle(particleName = "mu+");
0052   particleGun->SetParticleDefinition(particle);
0053   particleGun->SetParticleMomentumDirection(G4ThreeVector(0., 1., 0.));
0054   particleGun->SetParticleEnergy(100. * GeV);
0055   particleGun->SetParticlePosition(G4ThreeVector(0. * cm, 0. * cm, 0. * cm));
0056   fParticleGun = particleGun;
0057
0058   fMessenger = new RE01PrimaryGeneratorMessenger(this);
0059   fUseHEPEvt = true;
0060 }
0061
0062 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0063 #include "G4AutoLock.hh"
0064 namespace
0065 {
0066 G4Mutex RE01PrimGenDestrMutex = G4MUTEX_INITIALIZER;
0067 G4Mutex RE01PrimGenMutex = G4MUTEX_INITIALIZER;
0068 }  // namespace
0069
0070 RE01PrimaryGeneratorAction::~RE01PrimaryGeneratorAction()
0071 {
0072   G4AutoLock lock(&RE01PrimGenDestrMutex);
0073   if (fHEPEvt) {
0074     delete fHEPEvt;
0075     fHEPEvt = 0;
0076   }
0077   delete fParticleGun;
0078   delete fMessenger;
0079 }
0080
0081 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0082 void RE01PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0083 {
0084   if (fUseHEPEvt) {
0085     G4AutoLock lock(&RE01PrimGenMutex);
0086     fHEPEvt->GeneratePrimaryVertex(anEvent);
0087     if (anEvent->GetNumberOfPrimaryVertex() == 0) {  // End-of-file
0088       G4Exception("RE01PrimaryGeneratorAction::GeneratePrimaries", "RE01_0001", RunMustBeAborted,
0089                   "End of file detected.");
0090     }
0091   }
0092   else {
0093     fParticleGun->GeneratePrimaryVertex(anEvent);
0094   }
0095 }