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- // Boost.Geometry (aka GGL, Generic Geometry Library)
- // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
- // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
- // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
- // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
- // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
- // Use, modification and distribution is subject to 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_ASSIGN_BOX_CORNERS_HPP
- #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_ASSIGN_BOX_CORNERS_HPP
- #include <cstddef>
- #include <boost/geometry/geometries/concepts/check.hpp>
- #include <boost/geometry/algorithms/detail/assign_values.hpp>
- #include <boost/geometry/util/range.hpp>
- namespace boost { namespace geometry
- {
- #ifndef DOXYGEN_NO_DETAIL
- namespace detail
- {
- // Note: this is moved to namespace detail because the names and parameter orders
- // are not yet 100% clear.
- /*!
- \brief Assign the four points of a 2D box
- \ingroup assign
- \note The order is crucial. Most logical is LOWER, UPPER and sub-order LEFT, RIGHT
- so this is how it is implemented.
- \tparam Box \tparam_box
- \tparam Point \tparam_point
- \param box \param_box
- \param lower_left point being assigned to lower left coordinates of the box
- \param lower_right point being assigned to lower right coordinates of the box
- \param upper_left point being assigned to upper left coordinates of the box
- \param upper_right point being assigned to upper right coordinates of the box
- \qbk{
- [heading Example]
- [assign_box_corners] [assign_box_corners_output]
- }
- */
- template <typename Box, typename Point>
- inline void assign_box_corners(Box const& box,
- Point& lower_left, Point& lower_right,
- Point& upper_left, Point& upper_right)
- {
- concepts::check<Box const>();
- concepts::check<Point>();
- detail::assign::assign_box_2d_corner
- <min_corner, min_corner>(box, lower_left);
- detail::assign::assign_box_2d_corner
- <max_corner, min_corner>(box, lower_right);
- detail::assign::assign_box_2d_corner
- <min_corner, max_corner>(box, upper_left);
- detail::assign::assign_box_2d_corner
- <max_corner, max_corner>(box, upper_right);
- }
- // Silence warning C4127: conditional expression is constant
- #if defined(_MSC_VER)
- #pragma warning(push)
- #pragma warning(disable : 4127)
- #endif
- template <bool Reverse, typename Box, typename Range>
- inline void assign_box_corners_oriented(Box const& box, Range& corners)
- {
- if (Reverse)
- {
- // make counterclockwise ll,lr,ur,ul
- assign_box_corners(box,
- range::at(corners, 0), range::at(corners, 1),
- range::at(corners, 3), range::at(corners, 2));
- }
- else
- {
- // make clockwise ll,ul,ur,lr
- assign_box_corners(box,
- range::at(corners, 0), range::at(corners, 3),
- range::at(corners, 1), range::at(corners, 2));
- }
- }
- #if defined(_MSC_VER)
- #pragma warning(pop)
- #endif
- } // namespace detail
- #endif // DOXYGEN_NO_DETAIL
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ASSIGN_BOX_CORNERS_HPP
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