From 2eadb6247aa3f390e0466a79b4ebbd06b40e62b0 Mon Sep 17 00:00:00 2001
From: Barend Gehrels <barend@xs4all.nl>
Date: Sun, 27 Nov 2011 11:06:47 +0000
Subject: [PATCH] Added box-to-box conversion

[SVN r75686]
---
 include/boost/geometry/algorithms/convert.hpp | 12 +++
 .../algorithms/detail/convert_box_to_box.hpp  | 80 +++++++++++++++++++
 2 files changed, 92 insertions(+)
 create mode 100644 include/boost/geometry/algorithms/detail/convert_box_to_box.hpp

diff --git a/include/boost/geometry/algorithms/convert.hpp b/include/boost/geometry/algorithms/convert.hpp
index e6f16a77f..827bff228 100644
--- a/include/boost/geometry/algorithms/convert.hpp
+++ b/include/boost/geometry/algorithms/convert.hpp
@@ -29,6 +29,7 @@
 #include <boost/geometry/algorithms/detail/assign_box_corners.hpp>
 #include <boost/geometry/algorithms/detail/assign_indexed_point.hpp>
 #include <boost/geometry/algorithms/detail/convert_point_to_point.hpp>
+#include <boost/geometry/algorithms/detail/convert_box_to_box.hpp>
 
 #include <boost/geometry/views/closeable_view.hpp>
 #include <boost/geometry/views/reversible_view.hpp>
@@ -252,6 +253,17 @@ struct convert<false, point_tag, point_tag, DimensionCount, Geometry1, Geometry2
     : detail::conversion::point_to_point<Geometry1, Geometry2, 0, DimensionCount>
 {};
 
+
+template
+<
+    std::size_t DimensionCount,
+    typename Box1, typename Box2
+>
+struct convert<false, box_tag, box_tag, DimensionCount, Box1, Box2>
+    : detail::conversion::box_to_box<Box1, Box2, 0, DimensionCount>
+{};
+
+
 template <std::size_t DimensionCount, typename Segment, typename LineString>
 struct convert<false, segment_tag, linestring_tag, DimensionCount, Segment, LineString>
     : detail::conversion::segment_to_range<Segment, LineString>
diff --git a/include/boost/geometry/algorithms/detail/convert_box_to_box.hpp b/include/boost/geometry/algorithms/detail/convert_box_to_box.hpp
new file mode 100644
index 000000000..3d18d526c
--- /dev/null
+++ b/include/boost/geometry/algorithms/detail/convert_box_to_box.hpp
@@ -0,0 +1,80 @@
+// 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_CONVERT_BOX_TO_BOX_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_CONVERT_BOX_TO_BOX_HPP
+
+
+#include <cstddef>
+
+#include <boost/numeric/conversion/cast.hpp>
+#include <boost/geometry/core/access.hpp>
+#include <boost/geometry/core/coordinate_dimension.hpp>
+#include <boost/geometry/core/coordinate_type.hpp>
+
+
+namespace boost { namespace geometry
+{
+
+#ifndef DOXYGEN_NO_DETAIL
+namespace detail { namespace conversion
+{
+
+
+template
+<
+    typename Source, 
+    typename Destination, 
+    std::size_t Dimension, 
+    std::size_t DimensionCount
+>
+struct box_to_box
+{
+    static inline void apply(Source const& source, Destination& destination)
+    {
+        typedef typename coordinate_type<Destination>::type coordinate_type;
+
+        geometry::set<Dimension, min_corner>(destination, 
+            boost::numeric_cast<coordinate_type>(
+                geometry::get<Dimension, min_corner>(source)));
+        geometry::set<Dimension, max_corner>(destination, 
+            boost::numeric_cast<coordinate_type>(
+                geometry::get<Dimension, max_corner>(source)));
+        box_to_box<Source, Destination, Dimension + 1, DimensionCount>::apply(
+            source, destination);
+    }
+};
+
+template <typename Source, typename Destination, std::size_t DimensionCount>
+struct box_to_box<Source, Destination, DimensionCount, DimensionCount>
+{
+    static inline void apply(Source const& , Destination& )
+    {}
+};
+
+
+template <typename Source, typename Destination>
+inline void convert_box_to_box(Source const& source, Destination& destination)
+{
+    box_to_box<Source, Destination, 0, dimension<Destination>::value>::apply(
+        source, destination);
+}
+
+
+
+}} // namespace detail::conversion
+#endif // DOXYGEN_NO_DETAIL
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_CONVERT_BOX_TO_BOX_HPP