halfmesh_polygon.h

// Description: Half-edge structure polygon

#ifndef PASTELGEOMETRY_HALFMESH_POLYGON_H
#define PASTELGEOMETRY_HALFMESH_POLYGON_H

#include "pastel/geometry/halfmesh/halfmesh_fwd.h"

namespace Pastel
{

    namespace HalfMesh_
    {

        template <typename Settings>
        class Polygon
            : boost::less_than_comparable<Polygon<Settings>
            , boost::equality_comparable<Polygon<Settings>
            > >
            , public HalfMesh_Fwd<Settings>::PolygonData_Class
        {
        public:
            using Fwd = HalfMesh_Fwd<Settings>;
            PASTEL_FWD(PolygonData_Class);
            PASTEL_FWD(Half_Iterator);
            PASTEL_FWD(Half_ConstIterator);

            operator PolygonData_Class&()
            {
                return data();
            }

            operator const PolygonData_Class&() const
            {
                return data();
            }

            PolygonData_Class& data()
            {
                return *this;
            }

            const PolygonData_Class& data() const
            {
                return *this;
            }

            Half_Iterator half()
            {
                return half_;
            }

            Half_ConstIterator half() const
            {
                return half_;
            }

        protected:
            // Why protected rather than private?
            // See corresponding region for Vertex.

            template <typename... Type>
            Polygon(Type&&... data)
            : PolygonData_Class(std::forward<Type>(data)...)
            {
            }

            Polygon(const Polygon& that)
            : PolygonData_Class(that) 
            {
            }

            Polygon(Polygon&& that)
            : PolygonData_Class(std::move(that))
            {
            }

        private:
            template <typename, template <typename> class>
            friend class Pastel::HalfMesh;

            Half_Iterator half_;
        };

    }

}

#endif