RE01/src/RE01PrimaryGeneratorAction.cc

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0025 //
0026 /// \file runAndEvent/RE01/src/RE01PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the RE01PrimaryGeneratorAction class
0028 //
0029 //
0030
0031 #include "RE01PrimaryGeneratorAction.hh"
0032
0033 #include "RE01PrimaryGeneratorMessenger.hh"
0034
0035 #include "G4Event.hh"
0036 #include "G4HEPEvtInterface.hh"
0037 #include "G4ParticleDefinition.hh"
0038 #include "G4ParticleGun.hh"
0039 #include "G4ParticleTable.hh"
0040 #include "G4SystemOfUnits.hh"
0041
0042 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0043 RE01PrimaryGeneratorAction::RE01PrimaryGeneratorAction()
0044   : G4VUserPrimaryGeneratorAction(), fHEPEvt(0), fParticleGun(0), fMessenger(0)
0045 {
0046   const char* filename = "pythia_event.data";
0047   fHEPEvt = new G4HEPEvtInterface(filename);
0048
0049   G4int n_particle = 1;
0050   G4ParticleGun* particleGun = new G4ParticleGun(n_particle);
0051   G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
0052   G4String particleName;
0053   G4ParticleDefinition* particle = particleTable->FindParticle(particleName = "mu+");
0054   particleGun->SetParticleDefinition(particle);
0055   particleGun->SetParticleMomentumDirection(G4ThreeVector(0., 1., 0.));
0056   particleGun->SetParticleEnergy(100. * GeV);
0057   particleGun->SetParticlePosition(G4ThreeVector(0. * cm, 0. * cm, 0. * cm));
0058   fParticleGun = particleGun;
0059
0060   fMessenger = new RE01PrimaryGeneratorMessenger(this);
0061   fUseHEPEvt = true;
0062 }
0063
0064 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0065 #include "G4AutoLock.hh"
0066 namespace
0067 {
0068 G4Mutex RE01PrimGenDestrMutex = G4MUTEX_INITIALIZER;
0069 G4Mutex RE01PrimGenMutex = G4MUTEX_INITIALIZER;
0070 }  // namespace
0071
0072 RE01PrimaryGeneratorAction::~RE01PrimaryGeneratorAction()
0073 {
0074   G4AutoLock lock(&RE01PrimGenDestrMutex);
0075   if (fHEPEvt) {
0076     delete fHEPEvt;
0077     fHEPEvt = 0;
0078   }
0079   delete fParticleGun;
0080   delete fMessenger;
0081 }
0082
0083 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0084 void RE01PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0085 {
0086   if (fUseHEPEvt) {
0087     G4AutoLock lock(&RE01PrimGenMutex);
0088     fHEPEvt->GeneratePrimaryVertex(anEvent);
0089     if (anEvent->GetNumberOfPrimaryVertex() == 0) {  // End-of-file
0090       G4Exception("RE01PrimaryGeneratorAction::GeneratePrimaries", "RE01_0001", RunMustBeAborted,
0091                   "End of file detected.");
0092     }
0093   }
0094   else {
0095     fParticleGun->GeneratePrimaryVertex(anEvent);
0096   }
0097 }