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163 lines
4.5 KiB
163 lines
4.5 KiB
// Boost.Geometry (aka GGL, Generic Geometry Library) |
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// Copyright (c) 2010-2011 Barend Gehrels, Amsterdam, the Netherlands. |
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// Use, modification and distribution is subject to the Boost Software License, |
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_RING_HPP |
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#define BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_RING_HPP |
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// Adapts Geometries from Boost.Polygon for usage in Boost.Geometry |
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// boost::polygon::polygon_data -> boost::geometry::ring |
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#include <cstddef> |
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#include <boost/polygon/polygon.hpp> |
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#include <boost/geometry/core/access.hpp> |
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#include <boost/geometry/core/cs.hpp> |
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#include <boost/geometry/core/coordinate_dimension.hpp> |
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#include <boost/geometry/core/coordinate_type.hpp> |
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#include <boost/geometry/core/mutable_range.hpp> |
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#include <boost/geometry/core/tags.hpp> |
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#ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS |
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namespace boost { namespace geometry |
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{ |
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namespace traits |
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{ |
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template <typename CoordinateType> |
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struct tag<boost::polygon::polygon_data<CoordinateType> > |
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{ |
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typedef ring_tag type; |
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}; |
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template <typename CoordinateType> |
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struct clear<boost::polygon::polygon_data<CoordinateType> > |
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{ |
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static inline void apply(boost::polygon::polygon_data<CoordinateType>& data) |
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{ |
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// There is no "clear" function but we can assign |
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// a newly (and therefore empty) constructed polygon |
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boost::polygon::assign(data, boost::polygon::polygon_data<CoordinateType>()); |
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} |
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}; |
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template <typename CoordinateType> |
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struct push_back<boost::polygon::polygon_data<CoordinateType> > |
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{ |
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typedef boost::polygon::point_data<CoordinateType> point_type; |
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static inline void apply(boost::polygon::polygon_data<CoordinateType>& data, |
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point_type const& point) |
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{ |
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// Boost.Polygon's polygons are not appendable. So create a temporary vector, |
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// add a record and set it to the original. Of course: this is not efficient. |
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// But there seems no other way (without using a wrapper) |
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std::vector<point_type> temporary_vector |
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( |
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boost::polygon::begin_points(data), |
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boost::polygon::end_points(data) |
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); |
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temporary_vector.push_back(point); |
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data.set(temporary_vector.begin(), temporary_vector.end()); |
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} |
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}; |
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} // namespace traits |
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}} // namespace boost::geometry |
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// Adapt Boost.Polygon's polygon_data to Boost.Range |
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// This just translates to |
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// polygon_data.begin() and polygon_data.end() |
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namespace boost |
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{ |
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template<typename CoordinateType> |
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struct range_mutable_iterator<boost::polygon::polygon_data<CoordinateType> > |
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{ |
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typedef typename boost::polygon::polygon_traits |
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< |
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boost::polygon::polygon_data<CoordinateType> |
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>::iterator_type type; |
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}; |
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template<typename CoordinateType> |
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struct range_const_iterator<boost::polygon::polygon_data<CoordinateType> > |
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{ |
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typedef typename boost::polygon::polygon_traits |
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< |
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boost::polygon::polygon_data<CoordinateType> |
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>::iterator_type type; |
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}; |
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template<typename CoordinateType> |
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struct range_size<boost::polygon::polygon_data<CoordinateType> > |
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{ |
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typedef std::size_t type; |
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}; |
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} // namespace boost |
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// Support Boost.Polygon's polygon_data for Boost.Range ADP |
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namespace boost { namespace polygon |
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{ |
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template<typename CoordinateType> |
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inline typename polygon_traits |
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< |
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polygon_data<CoordinateType> |
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>::iterator_type range_begin(polygon_data<CoordinateType>& polygon) |
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{ |
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return polygon.begin(); |
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} |
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template<typename CoordinateType> |
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inline typename polygon_traits |
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< |
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polygon_data<CoordinateType> |
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>::iterator_type range_begin(polygon_data<CoordinateType> const& polygon) |
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{ |
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return polygon.begin(); |
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} |
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template<typename CoordinateType> |
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inline typename polygon_traits |
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< |
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polygon_data<CoordinateType> |
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>::iterator_type range_end(polygon_data<CoordinateType>& polygon) |
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{ |
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return polygon.end(); |
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} |
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template<typename CoordinateType> |
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inline typename polygon_traits |
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< |
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polygon_data<CoordinateType> |
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>::iterator_type range_end(polygon_data<CoordinateType> const& polygon) |
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{ |
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return polygon.end(); |
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} |
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template<typename CoordinateType> |
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inline std::size_t range_calculate_size(polygon_data<CoordinateType> const& polygon) |
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{ |
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return polygon.size(); |
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} |
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}} |
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#endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS |
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#endif // BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_RING_HPP
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