129 lines
3.7 KiB
C++
129 lines
3.7 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
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// This file was modified by Oracle on 2015, 2016.
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// Modifications copyright (c) 2015-2016, Oracle and/or its affiliates.
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// Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
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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_POINT_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_POINT_HPP
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#include <cstddef>
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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_system.hpp>
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#include <boost/geometry/core/tags.hpp>
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#include <boost/geometry/views/detail/indexed_point_view.hpp>
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#include <boost/geometry/algorithms/detail/convert_point_to_point.hpp>
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#include <boost/geometry/algorithms/detail/normalize.hpp>
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#include <boost/geometry/algorithms/detail/envelope/transform_units.hpp>
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#include <boost/geometry/algorithms/dispatch/envelope.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 <std::size_t Dimension, std::size_t DimensionCount>
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struct envelope_one_point
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{
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template <std::size_t Index, typename Point, typename Box>
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static inline void apply(Point const& point, Box& mbr)
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{
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detail::indexed_point_view<Box, Index> box_corner(mbr);
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detail::conversion::point_to_point
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<
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Point,
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detail::indexed_point_view<Box, Index>,
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Dimension,
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DimensionCount
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>::apply(point, box_corner);
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}
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template <typename Point, typename Box, typename Strategy>
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static inline void apply(Point const& point, Box& mbr, Strategy const&)
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{
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apply<min_corner>(point, mbr);
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apply<max_corner>(point, mbr);
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}
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};
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struct envelope_point_on_spheroid
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{
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template<typename Point, typename Box, typename Strategy>
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static inline void apply(Point const& point, Box& mbr, Strategy const& strategy)
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{
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Point normalized_point = detail::return_normalized<Point>(point);
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typename point_type<Box>::type box_point;
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// transform units of input point to units of a box point
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transform_units(normalized_point, box_point);
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geometry::set<min_corner, 0>(mbr, geometry::get<0>(box_point));
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geometry::set<min_corner, 1>(mbr, geometry::get<1>(box_point));
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geometry::set<max_corner, 0>(mbr, geometry::get<0>(box_point));
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geometry::set<max_corner, 1>(mbr, geometry::get<1>(box_point));
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envelope_one_point
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<
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2, dimension<Point>::value
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>::apply(normalized_point, mbr, strategy);
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}
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};
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}} // namespace detail::envelope
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#endif // DOXYGEN_NO_DETAIL
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#ifndef DOXYGEN_NO_DISPATCH
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namespace dispatch
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{
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template <typename Point, typename CS_Tag>
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struct envelope<Point, point_tag, CS_Tag>
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: detail::envelope::envelope_one_point<0, dimension<Point>::value>
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{};
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template <typename Point>
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struct envelope<Point, point_tag, spherical_equatorial_tag>
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: detail::envelope::envelope_point_on_spheroid
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{};
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template <typename Point>
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struct envelope<Point, point_tag, geographic_tag>
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: detail::envelope::envelope_point_on_spheroid
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{};
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} // namespace dispatch
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#endif // DOXYGEN_NO_DISPATCH
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_POINT_HPP
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