// MyPrimaryGenerator, inherits from G4VUserPrimaryGeneratorAction and is responsible
//  for defining how primary particles are generated in your simulation.

#ifndef GENERATOR_HH
#define GENERATOR_HH

#include "G4VUserPrimaryGeneratorAction.hh"
#include "G4ParticleGun.hh"
#include "G4SystemOfUnits.hh"
#include "G4ParticleTable.hh"

class MyPrimaryGenerator : public G4VUserPrimaryGeneratorAction
{
public:
    MyPrimaryGenerator();
    ~MyPrimaryGenerator();

    virtual void GeneratePrimaries(G4Event*) ; 
 
 //declares a variable  fParticleGun, which is a pointer to G4ParticleGun object
private:
    G4ParticleGun *fParticleGun;   
};

#endif