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#ifndef G4VFieldPropagation_h
#define  G4VFieldPropagation_h 1

#include "G4KineticTrackVector.hh"
#include "G4V3DNucleus.hh"

class G4VFieldPropagation
{
public:
  G4VFieldPropagation();
  virtual ~G4VFieldPropagation();

private:
  G4VFieldPropagation(const  G4VFieldPropagation &right);
  const G4VFieldPropagation & operator=(const G4VFieldPropagation & right);
  G4int operator==(const G4VFieldPropagation & right) const;
  G4int operator!=(const G4VFieldPropagation & right) const;

public:
  virtual void Init(G4V3DNucleus * theNucleus) = 0;
  virtual void Transport(G4KineticTrackVector &theActive,
			 const G4KineticTrackVector &theSpectators,
			 G4double theTimeStep) = 0;
  virtual G4ThreeVector GetMomentumTransfer() const =0;
};

#endif