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//
// G4VGCellFinder
//
// Class description:
//
// An interface of an GCellFinder. The G4GeometryCell is obtained
// in the parallel geometry from G4VParallelStepper and in the
// mass geometry from G4Step. This interface allows one to implement
// the two different ways to get a G4GeometryCell used by a process.

// Author: Michael Dressel (CERN), 2002
// ----------------------------------------------------------------------
#ifndef G4VGCELLFINDER_HH
#define G4VGCELLFINDER_HH

#include "globals.hh"
#include "G4GeometryCell.hh"

class G4Step;

/**
 * @brief G4VGCellFinder is an interface base class for GCellFinder.
 * The G4GeometryCell is obtained in the parallel geometry from
 * G4VParallelStepper and in the mass geometry from G4Step. This interface
 * allows one to implement the two different ways to get a G4GeometryCell
 * used by a process.
 */

class  G4VGCellFinder
{
  public:

    /**
     * Default Constructor and Destructor.
     */
    G4VGCellFinder() = default;
    virtual ~G4VGCellFinder() = default;

    /**
     * Returns the pre/post cell given the step.
     */
    virtual G4GeometryCell GetPreGeometryCell(const G4Step& aStep) const = 0;
    virtual G4GeometryCell GetPostGeometryCell(const G4Step& aStep) const = 0;
};

#endif
