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