//
// ********************************************************************
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//
//
// $Id: G4LineCurrentMagField.hh,v 1.3 2003/10/31 14:35:51 gcosmo Exp $
// GEANT4 tag $Name: geant4-06-00-patch-01 $
//
//
// class G4LineCurrentMagField
//
// Class description:
//
// Class describing line current magnetic field.
// 'fFieldConstant' determines the coefficient in the field law.
// The line current is directed along Z axis and crosses the XY
// plane in the origin point (0,0).

// History:
// 3.2.97 - V. Grichine, created.
// --------------------------------------------------------------------

#ifndef G4LINECURRENTMAGFIELD_HH
#define G4LINECURRENTMAGFIELD_HH

#include "G4MagneticField.hh"

class G4LineCurrentMagField : public G4MagneticField
{
  public:  // with description

    G4LineCurrentMagField(G4double pFieldConstant);
   ~G4LineCurrentMagField();

    void GetFieldValue(const G4double yTrack[] ,
                             G4double B[]      ) const;
  private:
  
    G4double fFieldConstant;
};

#endif