// This code implementation is the intellectual property of
// the GEANT4 collaboration.
//
// By copying, distributing or modifying the Program (or any work
// based on the Program) you indicate your acceptance of this statement,
// and all its terms.
//
// $Id: G4UniformElectricField.hh,v 1.4 2000/11/01 15:15:51 gcosmo Exp $
// GEANT4 tag $Name: geant4-03-01 $
//
// 
// class G4UniformElectricField
//
// Class description:
//
// Class for creation of Uniform electric Magnetic Field.

// History:
// - 30.01.97 V.Grichine, Created.
// - 01.08.97 J.Apostolakis, cleanup, new 3-vector constructor, 
//             and removal of helix-stepper (to separate file).
// - 05.11.97 G.Cosmo, added copy constructor and assignment operator.

#ifndef G4UNIFORMELECTRICFIELD_HH
#define G4UNIFORMELECTRICFIELD_HH

#include "globals.hh"
#include "G4ThreeVector.hh"
#include "G4ElectroMagneticField.hh"
#include "G4Mag_EqRhs.hh"

class G4UniformElectricField : public G4ElectroMagneticField
{
  public:  // with description

    G4UniformElectricField(const G4ThreeVector FieldVector );
      // A field with value equal to FieldVector.

    G4UniformElectricField(G4double vField,
	                   G4double vTheta,
		           G4double vPhi     ) ;
		       
    ~G4UniformElectricField() ;

    G4UniformElectricField(const G4UniformElectricField &p);
    G4UniformElectricField& operator = (const G4UniformElectricField &p);
      // Copy constructor and assignment operator

    void GetFieldValue(const G4double position[] ,
	                     G4double B[]      ) const ;

  private:
  
    G4double fFieldComponents[6] ;
};

#endif