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// $Id: G4ParallelStepper.hh,v 1.6 2002/10/22 13:18:45 dressel Exp $
// GEANT4 tag $Name: geant4-05-00 $
//
// ----------------------------------------------------------------------
// Class G4ParallelStepper
//
// Class description:
//
// Used internally by importance sampling and scoring in a "parallel"
// geometry. (See G4VParallelStepper.hh)

// Author: Michael Dressel (Michael.Dressel@cern.ch)
// ----------------------------------------------------------------------
#ifndef G4ParallelStepper_hh
#define G4ParallelStepper_hh G4ParallelStepper_hh

#include "G4VParallelStepper.hh"
#include "G4GeometryCellStep.hh"

class G4ParallelStepper : public G4VParallelStepper
{

public:  // with description

  G4ParallelStepper();
    // imitilisation

  G4ParallelStepper(const G4ParallelStepper &);
    // create new G4GeometryCellStep

  virtual ~G4ParallelStepper();
    // delete G4Pstep if created

  virtual G4GeometryCellStep GetPStep() const;
    // get the current G4GeometryCellStep
  
  virtual void Init(const G4GeometryCell &agCell);
    // initialise the parallel stepper and the G4GeometryCellStep
    // pre and post G4GeometryCell of the step are set equal

  virtual void Update(const G4GeometryCell &agCell);
    // to be called when crossing a boundary of the 
    // "parallel" geometry to update the G4GeometryCellStep

  virtual void UnSetCrossBoundary();
    // to be called to unset the fCrossBoundary member of the G4GeometryCellStep


  G4ParallelStepper &operator=(const G4ParallelStepper &);
    // create new G4GeometryCellStep

private:

  void Error(const G4String &m);

private:

  G4GeometryCellStep *fPStep;
};



#endif