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// $Id: G4VCurvedTrajectoryFilter.hh,v 1.3 2006/06/29 18:32:27 gunter Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
//
// class G4VCurevedTrajectoryFilter
//
// Class description:
//
// Decides which intermediate points on a curved trajectory merit
// being stored. Defines the compromise between accuracy of
// representation of the curved trajectory and memory use.
//
// Derived classes should implement the filtering algorithm in the
// method TakeIntermediatePoint().
//
// IMPORTANT: This class heap allocates vectors of auxiliary points,
// which it does not delete. The vectors must find their way to a
// subclass of G4VTrajectoryPoint, which must take responsibility for
// deleting them.

// History
//
// - First version: Oct 30, 2002  Jacek Generowicz
// ------------------------------------------------------------------------
#ifndef G4VCurvedTrajectoryFilter_hh
#define G4VCurvedTrajectoryFilter_hh

#include "G4ThreeVector.hh"
#include <vector>

class G4VCurvedTrajectoryFilter
{

public:  // with description

  G4VCurvedTrajectoryFilter();
  virtual ~G4VCurvedTrajectoryFilter();

    // Probably do not want these objects to be copied,
    // so make the copy constructor private
  
  void CreateNewTrajectorySegment( );
    // Each segment stores the auxiliary points of a single step.

  virtual void TakeIntermediatePoint( G4ThreeVector newPoint ) = 0;
    // Submit intermediate points for the filter to consider keeping or
    // rejecting. Derived classes should implement the filtering algorithm
    // in this method.

  std::vector<G4ThreeVector>* GimmeThePointsAndForgetThem();
  
protected:

  std::vector<G4ThreeVector>* fpFilteredPoints;
};

#endif  /* End of ifndef G4VCurvedTrajectoryFilter_hh */
