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// $Id: G4ElectricField.hh,v 1.2 2006/06/29 18:21:59 gunter Exp $
// GEANT4 tag $Name: geant4-09-04-beta-01 $
//
//
// class G4ElectricField
//
// Class description:
//
// Electric Field abstract class, implements inquiry function interface.

// History:
// - Created. JA, November 4th, 2003.

#ifndef G4ELECTRIC_FIELD_DEF
#define G4ELECTRIC_FIELD_DEF

#include "G4Types.hh"
#include "G4ElectroMagneticField.hh"

class G4ElectricField : public G4ElectroMagneticField
{
  public:  // with description

     G4ElectricField();
     virtual ~G4ElectricField();
       // Constructor and destructor. No actions.

     G4ElectricField(const G4ElectricField &r);
     G4ElectricField& operator = (const G4ElectricField &p);
       // Copy constructor & assignment operator.

     G4bool   DoesFieldChangeEnergy() const { return true; }
       // Since an electric field can change track energy

     virtual void  GetFieldValue( const G4double Point[4],
					G4double *Bfield ) const = 0;
};

#endif /* G4ELECTRIC_FIELD_DEF */