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/// \file persistency/gdml/G01/src/G01PrimaryGeneratorAction.cc
/// \brief Implementation of the G01PrimaryGeneratorAction class
//
//
//
//

#include "G01PrimaryGeneratorAction.hh"
#include "G4Event.hh"
#include "G4GeneralParticleSource.hh"
#include "G4ParticleTable.hh"
#include "G4ParticleDefinition.hh"
#include "G4SystemOfUnits.hh"

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

G01PrimaryGeneratorAction::G01PrimaryGeneratorAction()
 : G4VUserPrimaryGeneratorAction(),
   generator(0)
{
  G4int n_particle = 1;
  generator = new G4GeneralParticleSource(n_particle);

  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
  G4String particleName;
  generator->SetParticleDefinition(
               particleTable->FindParticle(particleName="geantino"));
  generator->SetParticleEnergy(1.0*GeV);
  generator->SetParticlePosition(G4ThreeVector(-4000.0, -4000.0,-4000.0*mm));
}

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

G01PrimaryGeneratorAction::~G01PrimaryGeneratorAction()
{
  delete generator;
}

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

void G01PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  G4int i = anEvent->GetEventID() % 3;
  G4ThreeVector v(2.0,0.0,0.0);
  switch(i)
  {
    case 0:
      break;
    case 1:
      v.setY(-4000.0);
      break;
    case 2:
      v.setZ(-4000.0);
      break;
  }
  generator->SetParticleMomentumDirection(v);
 generator->GeneratePrimaryVertex(anEvent);
}