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// $Id$
//
/// \file GB05PrimaryGeneratorAction.cc
/// \brief Implementation of the GB05PrimaryGeneratorAction class

#include "GB05PrimaryGeneratorAction.hh"
#include "G4SystemOfUnits.hh"


#include "G4Event.hh"
#include "G4ParticleGun.hh"
#include "G4ParticleTable.hh"
#include "G4ParticleDefinition.hh"
#include "Randomize.hh"

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

GB05PrimaryGeneratorAction::GB05PrimaryGeneratorAction()
 : G4VUserPrimaryGeneratorAction()
{
  G4int n_particle = 1;
  fParticleGun  = new G4ParticleGun(n_particle);

  // default particle kinematic
  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
  G4String particleName;
  G4ParticleDefinition* particle = particleTable->FindParticle(particleName="neutron");
  fParticleGun->SetParticleDefinition(particle);
  fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
  fParticleGun->SetParticleEnergy(100.*MeV);
  fParticleGun->SetParticlePosition(G4ThreeVector(0.,0.,-50*cm));
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

GB05PrimaryGeneratorAction::~GB05PrimaryGeneratorAction()
{
  delete fParticleGun;
}


void GB05PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  fParticleGun->GeneratePrimaryVertex(anEvent);
}

