// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (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_ASSIGN_BOX_CORNERS_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_ASSIGN_BOX_CORNERS_HPP
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#include <cstddef>
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#include <boost/geometry/geometries/concepts/check.hpp>
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#include <boost/geometry/algorithms/detail/assign_values.hpp>
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#include <boost/geometry/util/range.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
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{
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// Note: this is moved to namespace detail because the names and parameter orders
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// are not yet 100% clear.
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/*!
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\brief Assign the four points of a 2D box
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\ingroup assign
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\note The order is crucial. Most logical is LOWER, UPPER and sub-order LEFT, RIGHT
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so this is how it is implemented.
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\tparam Box \tparam_box
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\tparam Point \tparam_point
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\param box \param_box
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\param lower_left point being assigned to lower left coordinates of the box
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\param lower_right point being assigned to lower right coordinates of the box
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\param upper_left point being assigned to upper left coordinates of the box
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\param upper_right point being assigned to upper right coordinates of the box
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\qbk{
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[heading Example]
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[assign_box_corners] [assign_box_corners_output]
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}
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*/
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template <typename Box, typename Point>
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inline void assign_box_corners(Box const& box,
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Point& lower_left, Point& lower_right,
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Point& upper_left, Point& upper_right)
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{
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concepts::check<Box const>();
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concepts::check<Point>();
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detail::assign::assign_box_2d_corner
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<min_corner, min_corner>(box, lower_left);
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detail::assign::assign_box_2d_corner
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<max_corner, min_corner>(box, lower_right);
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detail::assign::assign_box_2d_corner
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<min_corner, max_corner>(box, upper_left);
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detail::assign::assign_box_2d_corner
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<max_corner, max_corner>(box, upper_right);
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}
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// Silence warning C4127: conditional expression is constant
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#if defined(_MSC_VER)
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#pragma warning(push)
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#pragma warning(disable : 4127)
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#endif
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template <bool Reverse, typename Box, typename Range>
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inline void assign_box_corners_oriented(Box const& box, Range& corners)
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{
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if (Reverse)
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{
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// make counterclockwise ll,lr,ur,ul
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assign_box_corners(box,
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range::at(corners, 0), range::at(corners, 1),
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range::at(corners, 3), range::at(corners, 2));
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}
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else
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{
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// make clockwise ll,ul,ur,lr
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assign_box_corners(box,
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range::at(corners, 0), range::at(corners, 3),
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range::at(corners, 1), range::at(corners, 2));
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}
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}
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#if defined(_MSC_VER)
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#pragma warning(pop)
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#endif
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} // namespace detail
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#endif // DOXYGEN_NO_DETAIL
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ASSIGN_BOX_CORNERS_HPP
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