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/// \file PrimaryGeneratorAction.cc
/// \brief Implementation of the PrimaryGeneratorAction class

#include "PrimaryGeneratorAction.hh"

#include "G4Event.hh"
#include "G4Geantino.hh"
#include "G4IonTable.hh"
#include "G4ParticleDefinition.hh"
#include "G4ParticleTable.hh"
#include "G4SystemOfUnits.hh"
#include "Randomize.hh"

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

  fParticleGun->SetParticleEnergy(0 * eV);
  fParticleGun->SetParticlePosition(G4ThreeVector(0. * cm, 0. * cm, 0. * cm));
  fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
}

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

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void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  if (fParticleGun->GetParticleDefinition() == G4Geantino::Geantino()) {
    G4int Z = 10, A = 24;
    G4double ionCharge = 0. * eplus;
    G4double excitEnergy = 0. * keV;

    G4ParticleDefinition* ion = G4IonTable::GetIonTable()->GetIon(Z, A, excitEnergy);
    fParticleGun->SetParticleDefinition(ion);
    fParticleGun->SetParticleCharge(ionCharge);
  }
  // create vertex
  //
  fParticleGun->GeneratePrimaryVertex(anEvent);
}

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