//
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//
// $Id: G4MagneticField.hh,v 1.10 2001/12/04 17:47:02 gcosmo Exp $
// GEANT4 tag $Name: geant4-05-00 $
//
//
// class G4MagneticField
//
// Class description:
//
// Magnetic Field abstract class, implements inquiry function interface.

// History:
// - Created. JA, January 13th, 1996.
// - Added default & copy constructors, virtual destructor and
//   assignment operator. G.Cosmo, November 5th, 1997.

#ifndef G4MAGNETIC_FIELD_DEF
#define G4MAGNETIC_FIELD_DEF

#include "G4Types.hh"
#include "G4Field.hh"

class G4MagneticField : public G4Field
{
  public:  // with description

     G4MagneticField();
     virtual ~G4MagneticField();
       // Constructor and destructor. No actions.

     G4MagneticField(const G4MagneticField &);
     G4MagneticField& operator = (const G4MagneticField &);
       // Copy constructor & assignment operator.

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

// Inline implementations

inline  G4MagneticField::G4MagneticField() {}
inline  G4MagneticField::~G4MagneticField() {}
inline  G4MagneticField::G4MagneticField(const G4MagneticField &):G4Field() {}
inline  G4MagneticField& G4MagneticField::operator = (const G4MagneticField &p)
 { if (&p == this) return *this; *this = p; return *this; }

#endif /* G4MAGNETIC_FIELD_DEF */