PrimaryGeneratorAction.cc

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// This example is provided by the Geant4-DNA collaboration
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// $ID$

#include "PrimaryGeneratorAction.hh"
#include "G4SystemOfUnits.hh"

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PrimaryGeneratorAction::PrimaryGeneratorAction():
G4VUserPrimaryGeneratorAction()
{
  G4int n_particle = 1;
  fpParticleGun  = new G4ParticleGun(n_particle);

  // default gun parameters
  fpParticleGun->SetParticleEnergy(10.*keV);
  fpParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
  fpParticleGun->SetParticlePosition(G4ThreeVector(0.,0.,-0.1*mm));
}

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

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void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  fpParticleGun->GeneratePrimaryVertex(anEvent);
}