// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2015, Oracle and/or its affiliates.
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// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
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// Distributed under the Boost Software License, Version 1.0.
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// (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_ALGORITHMS_DETAIL_ENVELOPE_TRANSFORM_UNITS_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_TRANSFORM_UNITS_HPP
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#include <cstddef>
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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/strategies/strategy_transform.hpp>
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#include <boost/geometry/views/detail/indexed_point_view.hpp>
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#include <boost/geometry/views/detail/two_dimensional_view.hpp>
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#include <boost/geometry/algorithms/not_implemented.hpp>
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#include <boost/geometry/algorithms/transform.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail { namespace envelope
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{
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template
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<
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typename GeometryIn,
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typename GeometryOut,
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typename TagIn = typename tag<GeometryIn>::type,
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typename TagOut = typename tag<GeometryOut>::type
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>
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struct transform_units_impl
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: not_implemented<TagIn, TagOut>
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{};
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template <typename PointIn, typename PointOut>
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struct transform_units_impl<PointIn, PointOut, point_tag, point_tag>
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{
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static inline void apply(PointIn const& point_in, PointOut& point_out)
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{
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detail::two_dimensional_view<PointIn const> view_in(point_in);
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detail::two_dimensional_view<PointOut> view_out(point_out);
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geometry::transform(view_in, view_out);
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}
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};
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template <typename BoxIn, typename BoxOut>
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struct transform_units_impl<BoxIn, BoxOut, box_tag, box_tag>
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{
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template <std::size_t Index>
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static inline void apply(BoxIn const& box_in, BoxOut& box_out)
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{
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typedef detail::indexed_point_view<BoxIn const, Index> view_in_type;
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typedef detail::indexed_point_view<BoxOut, Index> view_out_type;
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view_in_type view_in(box_in);
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view_out_type view_out(box_out);
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transform_units_impl
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<
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view_in_type, view_out_type
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>::apply(view_in, view_out);
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}
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static inline void apply(BoxIn const& box_in, BoxOut& box_out)
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{
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apply<min_corner>(box_in, box_out);
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apply<max_corner>(box_in, box_out);
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}
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};
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// Short utility to transform the units of the first two coordinates of
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// geometry_in to the units of geometry_out
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template <typename GeometryIn, typename GeometryOut>
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inline void transform_units(GeometryIn const& geometry_in,
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GeometryOut& geometry_out)
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{
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transform_units_impl
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<
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GeometryIn, GeometryOut
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>::apply(geometry_in, geometry_out);
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}
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}} // namespace detail::envelope
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#endif // DOXYGEN_NO_DETAIL
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}} // namespace boost:geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_TRANSFORM_UNITS_HPP
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