Added assign_box_corners.hpp in previous commit

[SVN r73324]

include/boost/geometry/algorithms/detail/assign_box_corners.hpp

@@ -0,0 +1,93 @@
+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands.
+// Copyright (c) 2008-2011 Bruno Lalande, Paris, France.
+// Copyright (c) 2009-2011 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>
+
+
+
+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)
+{
+    concept::check<Box const>();
+    concept::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);
+}
+
+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, corners[0], corners[1], corners[3], corners[2]);
+    }
+    else
+    {
+        // make clockwise ll,ul,ur,lr
+        assign_box_corners(box, corners[0], corners[3], corners[1], corners[2]);
+    }
+}
+
+
+} // namespace detail
+#endif // DOXYGEN_NO_DETAIL
+
+
+}} // namespace boost::geometry
+
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ASSIGN_BOX_CORNERS_HPP