Chris@102: // Boost.Geometry Index
Chris@102: //
Chris@102: // This view makes possible to treat some simple primitives as its bounding geometry
Chris@102: // e.g. box, nsphere, etc.
Chris@102: //
Chris@102: // Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
Chris@102: //
Chris@102: // Use, modification and distribution is subject to the Boost Software License,
Chris@102: // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@102: // http://www.boost.org/LICENSE_1_0.txt)
Chris@102: 
Chris@102: #ifndef BOOST_GEOMETRY_INDEX_DETAIL_BOUNDED_VIEW_HPP
Chris@102: #define BOOST_GEOMETRY_INDEX_DETAIL_BOUNDED_VIEW_HPP
Chris@102: 
Chris@102: namespace boost { namespace geometry {
Chris@102: 
Chris@102: namespace index { namespace detail {
Chris@102: 
Chris@102: template <typename Geometry,
Chris@102:           typename BoundingGeometry,
Chris@102:           typename Tag = typename geometry::tag<Geometry>::type,
Chris@102:           typename BoundingTag = typename geometry::tag<BoundingGeometry>::type>
Chris@102: struct bounded_view
Chris@102: {
Chris@102:     BOOST_MPL_ASSERT_MSG(
Chris@102:         (false),
Chris@102:         NOT_IMPLEMENTED_FOR_THOSE_GEOMETRIES,
Chris@102:         (BoundingTag, Tag));
Chris@102: };
Chris@102: 
Chris@102: 
Chris@102: // Segment -> Box
Chris@102: 
Chris@102: template <typename Segment, typename Box>
Chris@102: struct bounded_view<Segment, Box, segment_tag, box_tag>
Chris@102: {
Chris@102: public:
Chris@102:     typedef typename geometry::coordinate_type<Box>::type coordinate_type;
Chris@102: 
Chris@102:     explicit bounded_view(Segment const& segment)
Chris@102:         : m_segment(segment)
Chris@102:     {}
Chris@102:     
Chris@102:     template <std::size_t Dimension>
Chris@102:     inline coordinate_type get_min() const
Chris@102:     {
Chris@102:         return boost::numeric_cast<coordinate_type>(
Chris@102:                 (std::min)( geometry::get<0, Dimension>(m_segment),
Chris@102:                             geometry::get<1, Dimension>(m_segment) ) );
Chris@102:     }
Chris@102: 
Chris@102:     template <std::size_t Dimension>
Chris@102:     inline coordinate_type get_max() const
Chris@102:     {
Chris@102:         return boost::numeric_cast<coordinate_type>(
Chris@102:                 (std::max)( geometry::get<0, Dimension>(m_segment),
Chris@102:                             geometry::get<1, Dimension>(m_segment) ) );
Chris@102:     }
Chris@102: 
Chris@102: private:
Chris@102:     Segment const& m_segment;
Chris@102: };
Chris@102: 
Chris@102: // Box -> Box
Chris@102: 
Chris@102: template <typename BoxIn, typename Box>
Chris@102: struct bounded_view<BoxIn, Box, box_tag, box_tag>
Chris@102: {
Chris@102: public:
Chris@102:     typedef typename geometry::coordinate_type<Box>::type coordinate_type;
Chris@102: 
Chris@102:     explicit bounded_view(BoxIn const& box)
Chris@102:         : m_box(box)
Chris@102:     {}
Chris@102: 
Chris@102:     template <std::size_t Dimension>
Chris@102:     inline coordinate_type get_min() const
Chris@102:     {
Chris@102:         return boost::numeric_cast<coordinate_type>(
Chris@102:                 geometry::get<min_corner, Dimension>(m_box) );
Chris@102:     }
Chris@102: 
Chris@102:     template <std::size_t Dimension>
Chris@102:     inline coordinate_type get_max() const
Chris@102:     {
Chris@102:         return boost::numeric_cast<coordinate_type>(
Chris@102:                 geometry::get<max_corner, Dimension>(m_box) );
Chris@102:     }
Chris@102: 
Chris@102: private:
Chris@102:     BoxIn const& m_box;
Chris@102: };
Chris@102: 
Chris@102: // Point -> Box
Chris@102: 
Chris@102: template <typename Point, typename Box>
Chris@102: struct bounded_view<Point, Box, point_tag, box_tag>
Chris@102: {
Chris@102: public:
Chris@102:     typedef typename geometry::coordinate_type<Box>::type coordinate_type;
Chris@102: 
Chris@102:     explicit bounded_view(Point const& point)
Chris@102:         : m_point(point)
Chris@102:     {}
Chris@102: 
Chris@102:     template <std::size_t Dimension>
Chris@102:     inline coordinate_type get_min() const
Chris@102:     {
Chris@102:         return boost::numeric_cast<coordinate_type>(
Chris@102:                 geometry::get<Dimension>(m_point) );
Chris@102:     }
Chris@102: 
Chris@102:     template <std::size_t Dimension>
Chris@102:     inline coordinate_type get_max() const
Chris@102:     {
Chris@102:         return boost::numeric_cast<coordinate_type>(
Chris@102:                 geometry::get<Dimension>(m_point) );
Chris@102:     }
Chris@102: 
Chris@102: private:
Chris@102:     Point const& m_point;
Chris@102: };
Chris@102: 
Chris@102: }} // namespace index::detail
Chris@102: 
Chris@102: // XXX -> Box
Chris@102: 
Chris@102: #ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS
Chris@102: namespace traits
Chris@102: {
Chris@102: 
Chris@102: template <typename Geometry, typename Box, typename Tag>
Chris@102: struct tag< index::detail::bounded_view<Geometry, Box, Tag, box_tag> >
Chris@102: {
Chris@102:     typedef box_tag type;
Chris@102: };
Chris@102: 
Chris@102: template <typename Segment, typename Box, typename Tag>
Chris@102: struct point_type< index::detail::bounded_view<Segment, Box, Tag, box_tag> >
Chris@102: {
Chris@102:     typedef typename point_type<Box>::type type;
Chris@102: };
Chris@102: 
Chris@102: template <typename Segment, typename Box, typename Tag, std::size_t Dimension>
Chris@102: struct indexed_access<index::detail::bounded_view<Segment, Box, Tag, box_tag>,
Chris@102:                       min_corner, Dimension>
Chris@102: {
Chris@102:     typedef index::detail::bounded_view<Segment, Box, Tag, box_tag> box_type;
Chris@102:     typedef typename geometry::coordinate_type<Box>::type coordinate_type;
Chris@102: 
Chris@102:     static inline coordinate_type get(box_type const& b)
Chris@102:     {
Chris@102:         return b.template get_min<Dimension>();
Chris@102:     }
Chris@102: 
Chris@102:     //static inline void set(box_type & b, coordinate_type const& value)
Chris@102:     //{
Chris@102:     //    BOOST_GEOMETRY_INDEX_ASSERT(false, "unable to modify a box through view");
Chris@102:     //}
Chris@102: };
Chris@102: 
Chris@102: template <typename Segment, typename Box, typename Tag, std::size_t Dimension>
Chris@102: struct indexed_access<index::detail::bounded_view<Segment, Box, Tag, box_tag>,
Chris@102:                       max_corner, Dimension>
Chris@102: {
Chris@102:     typedef index::detail::bounded_view<Segment, Box, Tag, box_tag> box_type;
Chris@102:     typedef typename geometry::coordinate_type<Box>::type coordinate_type;
Chris@102: 
Chris@102:     static inline coordinate_type get(box_type const& b)
Chris@102:     {
Chris@102:         return b.template get_max<Dimension>();
Chris@102:     }
Chris@102: 
Chris@102:     //static inline void set(box_type & b, coordinate_type const& value)
Chris@102:     //{
Chris@102:     //    BOOST_GEOMETRY_INDEX_ASSERT(false, "unable to modify a box through view");
Chris@102:     //}
Chris@102: };
Chris@102: 
Chris@102: } // namespace traits
Chris@102: #endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS
Chris@102: 
Chris@102: }} // namespace boost::geometry
Chris@102: 
Chris@102: #endif // BOOST_GEOMETRY_INDEX_DETAIL_BOUNDED_VIEW_HPP