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// $Id$
//
/// \file optical/LXe/src/LXePrimaryGeneratorAction.cc
/// \brief Implementation of the LXePrimaryGeneratorAction class
//
//
#include "LXePrimaryGeneratorAction.hh"

#include "G4Event.hh"
#include "G4ParticleGun.hh"
#include "G4ParticleTable.hh"
#include "G4ParticleDefinition.hh"
#include "G4SystemOfUnits.hh"
#include "globals.hh"

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

LXePrimaryGeneratorAction::LXePrimaryGeneratorAction(){
  G4int n_particle = 1;
  fParticleGun = new G4ParticleGun(n_particle);
 
  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
 
  G4String particleName;
  fParticleGun->SetParticleDefinition(particleTable->
                                     FindParticle(particleName="gamma"));
  //Default energy,position,momentum
  fParticleGun->SetParticleEnergy(511.*keV);
  fParticleGun->SetParticlePosition(G4ThreeVector(0.0 , 0.0, -20.0*cm));
  fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
}

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

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

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

void LXePrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent){
  fParticleGun->GeneratePrimaryVertex(anEvent);
}
