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/// @file PrimaryGeneratorAction.cc
/// @brief Define primary generator action

#include "PrimaryGeneratorAction.hh"

#include "G4ParticleDefinition.hh"
#include "G4ParticleGun.hh"
#include "G4ParticleTable.hh"
#include "G4SystemOfUnits.hh"

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
PrimaryGeneratorAction::PrimaryGeneratorAction()
{
  fparticleGun = new G4ParticleGun;

  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
  G4ParticleDefinition* particle = particleTable->FindParticle("e-");

  fparticleGun->SetParticleDefinition(particle);
  fparticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
  fparticleGun->SetParticlePosition(G4ThreeVector(0., 0., -14.9 * cm));
  fparticleGun->SetParticleEnergy(200. * MeV);
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
PrimaryGeneratorAction::~PrimaryGeneratorAction()
{
  delete fparticleGun;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  fparticleGun->GeneratePrimaryVertex(anEvent);
}