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//
// $Id: ExN07PrimaryGeneratorAction.cc,v 1.3 2006/06/29 17:55:01 gunter Exp $
// GEANT4 tag $Name: geant4-09-03-cand-01 $
//

#include "ExN07PrimaryGeneratorAction.hh"

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

ExN07PrimaryGeneratorAction::ExN07PrimaryGeneratorAction()
:serial(false)
{
  G4int n_particle = 1;
  particleGun  = new G4ParticleGun(n_particle);
  
  // default particle kinematic
  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
  G4String particleName;
  G4ParticleDefinition* particle
                    = particleTable->FindParticle(particleName="mu-");
  particleGun->SetParticleDefinition(particle);
  particleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
  particleGun->SetParticleEnergy(100.*GeV);
}

ExN07PrimaryGeneratorAction::~ExN07PrimaryGeneratorAction()
{
  delete particleGun;
}

void ExN07PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  if(serial)
  {
    particleGun->SetParticlePosition(G4ThreeVector(0.,0.,-3.5*m));
    particleGun->GeneratePrimaryVertex(anEvent);
  }
  else
  {
    for(G4int i=0;i<3;i++)
    {
      particleGun->SetParticlePosition(G4ThreeVector(0.,G4double(i-1)*m,-1.5*m));
      particleGun->GeneratePrimaryVertex(anEvent);
    }
  }
}