//
// ********************************************************************
// * DISCLAIMER                                                       *
// *                                                                  *
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//
//
// $Id: G4Field.hh,v 1.6 2001/11/08 17:31:07 grichine Exp $
// GEANT4 tag $Name: geant4-04-01 $
//
//
// class G4Field
//
// Class description:
//
// Abstract class for any kind of Field.
// It allows any kind of field (vector, scalar, tensor and any set of them)
// to be defined by implementing the inquiry function interface.

// History:
// - Created:  John Apostolakis, 10.03.1997

#ifndef G4FIELD_HH
#define G4FIELD_HH

class G4Field
{
  public:  // with description

      virtual void  GetFieldValue( const  double Point[4],
					  double *Bfield ) const = 0;
      G4Field(){;}
      virtual ~G4Field(){;}

     // A field signature function that can be used to insure
     // that the Equation of motion object and the G4Field object
     // have the same "field signature"?
};


#endif /* G4FIELD_HH */