147 lines
3.9 KiB
C++
147 lines
3.9 KiB
C++
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// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2015-2022, Oracle and/or its affiliates.
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// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Licensed under the Boost Software License version 1.0.
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// http://www.boost.org/users/license.html
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#ifndef BOOST_GEOMETRY_GEOMETRIES_HELPER_GEOMETRY_HPP
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#define BOOST_GEOMETRY_GEOMETRIES_HELPER_GEOMETRY_HPP
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#include <boost/geometry/core/closure.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/cs.hpp>
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#include <boost/geometry/core/point_order.hpp>
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#include <boost/geometry/core/point_type.hpp>
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#include <boost/geometry/core/tag.hpp>
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#include <boost/geometry/core/tags.hpp>
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#include <boost/geometry/geometries/box.hpp>
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#include <boost/geometry/geometries/linestring.hpp>
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#include <boost/geometry/geometries/point.hpp>
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#include <boost/geometry/geometries/ring.hpp>
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#include <boost/geometry/algorithms/not_implemented.hpp>
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namespace boost { namespace geometry
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{
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namespace detail { namespace helper_geometries
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{
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template
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<
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typename Point,
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typename NewCoordinateType,
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typename NewUnits,
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typename CS_Tag = typename cs_tag<Point>::type
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>
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struct helper_point
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{
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typedef model::point
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<
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NewCoordinateType,
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dimension<Point>::value,
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typename cs_tag_to_coordinate_system<NewUnits, CS_Tag>::type
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> type;
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};
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}} // detail::helper_geometries
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namespace detail_dispatch
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{
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template
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<
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typename Geometry,
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typename NewCoordinateType,
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typename NewUnits,
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typename Tag = typename tag<Geometry>::type>
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struct helper_geometry : not_implemented<Geometry>
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{};
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template <typename Point, typename NewCoordinateType, typename NewUnits>
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struct helper_geometry<Point, NewCoordinateType, NewUnits, point_tag>
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{
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using type = typename detail::helper_geometries::helper_point
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<
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Point, NewCoordinateType, NewUnits
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>::type;
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};
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template <typename Box, typename NewCoordinateType, typename NewUnits>
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struct helper_geometry<Box, NewCoordinateType, NewUnits, box_tag>
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{
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using type = model::box
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<
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typename helper_geometry
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<
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typename point_type<Box>::type, NewCoordinateType, NewUnits
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>::type
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>;
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};
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template <typename Linestring, typename NewCoordinateType, typename NewUnits>
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struct helper_geometry<Linestring, NewCoordinateType, NewUnits, linestring_tag>
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{
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using type = model::linestring
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<
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typename helper_geometry
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<
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typename point_type<Linestring>::type, NewCoordinateType, NewUnits
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>::type
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>;
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};
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template <typename Ring, typename NewCoordinateType, typename NewUnits>
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struct helper_geometry<Ring, NewCoordinateType, NewUnits, ring_tag>
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{
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using type = model::ring
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<
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typename helper_geometry
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<
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typename point_type<Ring>::type, NewCoordinateType, NewUnits
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>::type,
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point_order<Ring>::value != counterclockwise,
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closure<Ring>::value != open
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>;
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};
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} // detail_dispatch
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// Meta-function that provides a new helper geometry of the same kind as
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// the input geometry and the same coordinate system type,
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// but with a possibly different coordinate type and coordinate system units
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template
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<
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typename Geometry,
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typename NewCoordinateType = typename coordinate_type<Geometry>::type,
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typename NewUnits = typename detail::cs_angular_units<Geometry>::type
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>
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struct helper_geometry
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{
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using type = typename detail_dispatch::helper_geometry
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<
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Geometry, NewCoordinateType, NewUnits
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>::type;
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};
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_GEOMETRIES_HELPER_GEOMETRY_HPP
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