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//
// G4VCurvedTrajectoryFilter
//
// 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.

// First version: Oct 30, 2002 - Jacek Generowicz
// ------------------------------------------------------------------------
#ifndef G4VCURVEDTRAJECTORYFILTER_HH
#define G4VCURVEDTRAJECTORYFILTER_HH 1

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

class G4VCurvedTrajectoryFilter
{

  public:

    G4VCurvedTrajectoryFilter() = default;
    virtual ~G4VCurvedTrajectoryFilter() = default;

      // 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 = nullptr;
};

#endif
