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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
// This file was modified by Oracle on 2015, 2016, 2017.
// Modifications copyright (c) 2015-2017, Oracle and/or its affiliates.
// Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
// Distributed under 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_ALGORITHMS_DETAIL_ENVELOPE_BOX_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_BOX_HPP
#include <cstddef>
#include <boost/geometry/core/cs.hpp>
#include <boost/geometry/core/coordinate_dimension.hpp>
#include <boost/geometry/core/coordinate_system.hpp>
#include <boost/geometry/core/tags.hpp>
#include <boost/geometry/views/detail/indexed_point_view.hpp>
#include <boost/geometry/algorithms/detail/convert_point_to_point.hpp>
#include <boost/geometry/algorithms/detail/normalize.hpp>
#include <boost/geometry/algorithms/detail/envelope/transform_units.hpp>
#include <boost/geometry/algorithms/dispatch/envelope.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace envelope
{
template
<
std::size_t Index,
std::size_t Dimension,
std::size_t DimensionCount
>
struct envelope_indexed_box
{
template <typename BoxIn, typename BoxOut>
static inline void apply(BoxIn const& box_in, BoxOut& mbr)
{
detail::indexed_point_view<BoxIn const, Index> box_in_corner(box_in);
detail::indexed_point_view<BoxOut, Index> mbr_corner(mbr);
detail::conversion::point_to_point
<
detail::indexed_point_view<BoxIn const, Index>,
detail::indexed_point_view<BoxOut, Index>,
Dimension,
DimensionCount
>::apply(box_in_corner, mbr_corner);
}
};
template
<
std::size_t Index,
std::size_t DimensionCount
>
struct envelope_indexed_box_on_spheroid
{
template <typename BoxIn, typename BoxOut>
static inline void apply(BoxIn const& box_in, BoxOut& mbr)
{
// transform() does not work with boxes of dimension higher
// than 2; to account for such boxes we transform the min/max
// points of the boxes using the indexed_point_view
detail::indexed_point_view<BoxIn const, Index> box_in_corner(box_in);
detail::indexed_point_view<BoxOut, Index> mbr_corner(mbr);
// first transform the units
transform_units(box_in_corner, mbr_corner);
// now transform the remaining coordinates
detail::conversion::point_to_point
<
detail::indexed_point_view<BoxIn const, Index>,
detail::indexed_point_view<BoxOut, Index>,
2,
DimensionCount
>::apply(box_in_corner, mbr_corner);
}
};
struct envelope_box
{
template<typename BoxIn, typename BoxOut, typename Strategy>
static inline void apply(BoxIn const& box_in,
BoxOut& mbr,
Strategy const&)
{
envelope_indexed_box
<
min_corner, 0, dimension<BoxIn>::value
>::apply(box_in, mbr);
envelope_indexed_box
<
max_corner, 0, dimension<BoxIn>::value
>::apply(box_in, mbr);
}
};
struct envelope_box_on_spheroid
{
template <typename BoxIn, typename BoxOut, typename Strategy>
static inline void apply(BoxIn const& box_in,
BoxOut& mbr,
Strategy const&)
{
BoxIn box_in_normalized = detail::return_normalized<BoxIn>(box_in);
envelope_indexed_box_on_spheroid
<
min_corner, dimension<BoxIn>::value
>::apply(box_in_normalized, mbr);
envelope_indexed_box_on_spheroid
<
max_corner, dimension<BoxIn>::value
>::apply(box_in_normalized, mbr);
}
};
}} // namespace detail::envelope
#endif // DOXYGEN_NO_DETAIL
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
template <typename Box>
struct envelope<Box, box_tag, cartesian_tag>
: detail::envelope::envelope_box
{};
template <typename Box>
struct envelope<Box, box_tag, spherical_polar_tag>
: detail::envelope::envelope_box_on_spheroid
{};
template <typename Box>
struct envelope<Box, box_tag, spherical_equatorial_tag>
: detail::envelope::envelope_box_on_spheroid
{};
template <typename Box>
struct envelope<Box, box_tag, geographic_tag>
: detail::envelope::envelope_box_on_spheroid
{};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_BOX_HPP
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