Chris@16: // Boost.Geometry (aka GGL, Generic Geometry Library)
Chris@16: 
Chris@16: // Copyright (c) 2010-2012 Barend Gehrels, Amsterdam, the Netherlands.
Chris@16: 
Chris@16: // Use, modification and distribution is subject to the Boost Software License,
Chris@16: // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_RING_HPP
Chris@16: #define BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_RING_HPP
Chris@16: 
Chris@16: // Adapts Geometries from Boost.Polygon for usage in Boost.Geometry
Chris@16: // boost::polygon::polygon_data -> boost::geometry::ring
Chris@16: 
Chris@16: #include <cstddef>
Chris@16: #include <boost/polygon/polygon.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/core/access.hpp>
Chris@16: #include <boost/geometry/core/cs.hpp>
Chris@16: #include <boost/geometry/core/coordinate_dimension.hpp>
Chris@16: #include <boost/geometry/core/coordinate_type.hpp>
Chris@16: #include <boost/geometry/core/mutable_range.hpp>
Chris@16: #include <boost/geometry/core/tags.hpp>
Chris@16: 
Chris@16: 
Chris@16: #ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS
Chris@16: 
Chris@16: namespace boost { namespace geometry
Chris@16: {
Chris@16: 
Chris@16: namespace traits
Chris@16: {
Chris@16: 
Chris@16: template <typename CoordinateType>
Chris@16: struct tag<boost::polygon::polygon_data<CoordinateType> >
Chris@16: {
Chris@16:     typedef ring_tag type;
Chris@16: };
Chris@16: 
Chris@16: template <typename CoordinateType>
Chris@16: struct clear<boost::polygon::polygon_data<CoordinateType> >
Chris@16: {
Chris@16:     static inline void apply(boost::polygon::polygon_data<CoordinateType>& data)
Chris@16:     {
Chris@16:         // There is no "clear" function but we can assign
Chris@16:         // a newly (and therefore empty) constructed polygon
Chris@16:         boost::polygon::assign(data, boost::polygon::polygon_data<CoordinateType>());
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: template <typename CoordinateType>
Chris@16: struct push_back<boost::polygon::polygon_data<CoordinateType> >
Chris@16: {
Chris@16:     typedef boost::polygon::point_data<CoordinateType> point_type;
Chris@16: 
Chris@16:     static inline void apply(boost::polygon::polygon_data<CoordinateType>& data,
Chris@16:          point_type const& point)
Chris@16:     {
Chris@16:         // Boost.Polygon's polygons are not appendable. So create a temporary vector,
Chris@16:         // add a record and set it to the original. Of course: this is not efficient.
Chris@16:         // But there seems no other way (without using a wrapper)
Chris@16:         std::vector<point_type> temporary_vector
Chris@16:             (
Chris@16:                 boost::polygon::begin_points(data),
Chris@16:                 boost::polygon::end_points(data)
Chris@16:             );
Chris@16:         temporary_vector.push_back(point);
Chris@16:         data.set(temporary_vector.begin(), temporary_vector.end());
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@101: template <typename CoordinateType>
Chris@101: struct resize<boost::polygon::polygon_data<CoordinateType> >
Chris@101: {
Chris@101:     typedef boost::polygon::point_data<CoordinateType> point_type;
Chris@16: 
Chris@101:     static inline void apply(boost::polygon::polygon_data<CoordinateType>& data,
Chris@101:                              std::size_t new_size)
Chris@101:     {
Chris@101:         // Boost.Polygon's polygons are not resizable. So create a temporary vector,
Chris@101:         // resize it and set it to the original. Of course: this is not efficient.
Chris@101:         // But there seems no other way (without using a wrapper)
Chris@101:         std::vector<point_type> temporary_vector
Chris@101:             (
Chris@101:                 boost::polygon::begin_points(data),
Chris@101:                 boost::polygon::end_points(data)
Chris@101:             );
Chris@101:         temporary_vector.resize(new_size);
Chris@101:         data.set(temporary_vector.begin(), temporary_vector.end());
Chris@101:     }
Chris@101: };
Chris@16: 
Chris@16: 
Chris@16: } // namespace traits
Chris@16: 
Chris@16: }} // namespace boost::geometry
Chris@16: 
Chris@16: 
Chris@16: // Adapt Boost.Polygon's polygon_data to Boost.Range
Chris@16: // This just translates to
Chris@16: // polygon_data.begin() and polygon_data.end()
Chris@16: namespace boost
Chris@16: {
Chris@16:     template<typename CoordinateType>
Chris@16:     struct range_mutable_iterator<boost::polygon::polygon_data<CoordinateType> >
Chris@16:     {
Chris@16:         typedef typename boost::polygon::polygon_traits
Chris@16:             <
Chris@16:                 boost::polygon::polygon_data<CoordinateType>
Chris@16:             >::iterator_type type;
Chris@16:     };
Chris@16: 
Chris@16:     template<typename CoordinateType>
Chris@16:     struct range_const_iterator<boost::polygon::polygon_data<CoordinateType> >
Chris@16:     {
Chris@16:         typedef typename boost::polygon::polygon_traits
Chris@16:             <
Chris@16:                 boost::polygon::polygon_data<CoordinateType>
Chris@16:             >::iterator_type type;
Chris@16:     };
Chris@16: 
Chris@16:     template<typename CoordinateType>
Chris@16:     struct range_size<boost::polygon::polygon_data<CoordinateType> >
Chris@16:     {
Chris@16:         typedef std::size_t type;
Chris@16:     };
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: 
Chris@16: // Support Boost.Polygon's polygon_data for Boost.Range ADP
Chris@16: namespace boost { namespace polygon
Chris@16: {
Chris@16: 
Chris@16: template<typename CoordinateType>
Chris@16: inline typename polygon_traits
Chris@16:         <
Chris@16:             polygon_data<CoordinateType>
Chris@16:         >::iterator_type range_begin(polygon_data<CoordinateType>& polygon)
Chris@16: {
Chris@16:     return polygon.begin();
Chris@16: }
Chris@16: 
Chris@16: template<typename CoordinateType>
Chris@16: inline typename polygon_traits
Chris@16:         <
Chris@16:             polygon_data<CoordinateType>
Chris@16:         >::iterator_type range_begin(polygon_data<CoordinateType> const& polygon)
Chris@16: {
Chris@16:     return polygon.begin();
Chris@16: }
Chris@16: 
Chris@16: template<typename CoordinateType>
Chris@16: inline typename polygon_traits
Chris@16:         <
Chris@16:             polygon_data<CoordinateType>
Chris@16:         >::iterator_type range_end(polygon_data<CoordinateType>& polygon)
Chris@16: {
Chris@16:     return polygon.end();
Chris@16: }
Chris@16: 
Chris@16: template<typename CoordinateType>
Chris@16: inline typename polygon_traits
Chris@16:         <
Chris@16:             polygon_data<CoordinateType>
Chris@16:         >::iterator_type range_end(polygon_data<CoordinateType> const& polygon)
Chris@16: {
Chris@16:     return polygon.end();
Chris@16: }
Chris@16: 
Chris@16: template<typename CoordinateType>
Chris@16: inline std::size_t range_calculate_size(polygon_data<CoordinateType> const& polygon)
Chris@16: {
Chris@16:     return polygon.size();
Chris@16: }
Chris@16: 
Chris@16: }}
Chris@16: 
Chris@16: #endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS
Chris@16: 
Chris@16: 
Chris@16: #endif // BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_RING_HPP