PrimaryGeneratorAction.cc

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//
// This example is provided by the Geant4-DNA collaboration
// Any report or published results obtained using the Geant4-DNA software 
// shall cite the following Geant4-DNA collaboration publication:
// Med. Phys. 37 (2010) 4692-4708
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// $Id: PrimaryGeneratorAction.cc 68058 2013-03-13 14:47:43Z gcosmo $
//

#include "PrimaryGeneratorAction.hh"

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

//#include "Randomize.hh"

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PrimaryGeneratorAction::PrimaryGeneratorAction()
 : G4VUserPrimaryGeneratorAction()
{
  G4int nofParticles = 1;
  fParticleGun = new G4ParticleGun(nofParticles);

  // default particle kinematic

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

  fParticleGun->SetParticleDefinition(particleDefinition);
  fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
  fParticleGun->SetParticleEnergy(1*keV);
}

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

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void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  // This function is called at the begining of event

  fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., 0.));

  fParticleGun->GeneratePrimaryVertex(anEvent);
}

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