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//
// $Id: g4rwPrimaryGeneratorAction.cc,v 1.4 2006/06/29 17:21:52 gunter Exp $
// GEANT4 tag $Name: geant4-09-00 $
//

#include "g4rwPrimaryGeneratorAction.hh"

#include "G4Event.hh"
#include "G4ParticleGun.hh"
#include "G4UImanager.hh"
#include "globals.hh"

gogdmlPrimaryGeneratorAction::gogdmlPrimaryGeneratorAction()
{
  G4int n_particle = 1;
  particleGun = new G4ParticleGun(n_particle);

  G4UImanager* UI = G4UImanager::GetUIpointer();
  UI->ApplyCommand("/gun/particle geantino");
  UI->ApplyCommand("/gun/position 0.0 0.0 0.0 cm");
}

gogdmlPrimaryGeneratorAction::~gogdmlPrimaryGeneratorAction()
{
  delete particleGun;
}

void gogdmlPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  G4UImanager* UI = G4UImanager::GetUIpointer();
  G4int i = anEvent->GetEventID() % 3;
  switch(i)
  {
    case 0:
      UI->ApplyCommand("/gun/direction 0.2 0.0 1.0");
      break;
    case 1:
      UI->ApplyCommand("/gun/direction 0.0 0.3 1.0");
      break;
    case 2:
      UI->ApplyCommand("/gun/direction 0.1 0.0 1.0");
      break;
  }

  particleGun->GeneratePrimaryVertex(anEvent);
}