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136 lines
3.8 KiB
136 lines
3.8 KiB
// Boost.Geometry (aka GGL, Generic Geometry Library) |
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// Copyright (c) 2008-2011 Bruno Lalande, Paris, France. |
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// Copyright (c) 2008-2011 Barend Gehrels, Amsterdam, the Netherlands. |
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// Copyright (c) 2009-2011 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_GEOMETRIES_CONCEPTS_BOX_CONCEPT_HPP |
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#define BOOST_GEOMETRY_GEOMETRIES_CONCEPTS_BOX_CONCEPT_HPP |
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#include <cstddef> |
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#include <boost/concept_check.hpp> |
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#include <boost/geometry/core/access.hpp> |
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#include <boost/geometry/core/coordinate_dimension.hpp> |
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#include <boost/geometry/core/point_type.hpp> |
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namespace boost { namespace geometry { namespace concept |
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{ |
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/*! |
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\brief Box concept |
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\ingroup concepts |
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\par Formal definition: |
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The box concept is defined as following: |
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- there must be a specialization of traits::tag defining box_tag as type |
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- there must be a specialization of traits::point_type to define the |
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underlying point type (even if it does not consist of points, it should define |
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this type, to indicate the points it can work with) |
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- there must be a specialization of traits::indexed_access, per index |
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(min_corner, max_corner) and per dimension, with two functions: |
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- get to get a coordinate value |
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- set to set a coordinate value (this one is not checked for ConstBox) |
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*/ |
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template <typename Geometry> |
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class Box |
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{ |
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#ifndef DOXYGEN_NO_CONCEPT_MEMBERS |
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typedef typename point_type<Geometry>::type point_type; |
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template |
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< |
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std::size_t Index, |
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std::size_t Dimension, |
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std::size_t DimensionCount |
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> |
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struct dimension_checker |
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{ |
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static void apply() |
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{ |
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Geometry* b = 0; |
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geometry::set<Index, Dimension>(*b, geometry::get<Index, Dimension>(*b)); |
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dimension_checker<Index, Dimension + 1, DimensionCount>::apply(); |
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} |
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}; |
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template <std::size_t Index, std::size_t DimensionCount> |
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struct dimension_checker<Index, DimensionCount, DimensionCount> |
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{ |
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static void apply() {} |
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}; |
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public : |
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BOOST_CONCEPT_USAGE(Box) |
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{ |
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static const std::size_t n = dimension<Geometry>::type::value; |
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dimension_checker<min_corner, 0, n>::apply(); |
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dimension_checker<max_corner, 0, n>::apply(); |
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} |
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#endif |
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}; |
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/*! |
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\brief Box concept (const version) |
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\ingroup const_concepts |
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\details The ConstBox concept apply the same as the Box concept, |
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but does not apply write access. |
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*/ |
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template <typename Geometry> |
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class ConstBox |
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{ |
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#ifndef DOXYGEN_NO_CONCEPT_MEMBERS |
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typedef typename point_type<Geometry>::type point_type; |
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typedef typename coordinate_type<Geometry>::type coordinate_type; |
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template |
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< |
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std::size_t Index, |
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std::size_t Dimension, |
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std::size_t DimensionCount |
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> |
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struct dimension_checker |
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{ |
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static void apply() |
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{ |
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const Geometry* b = 0; |
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coordinate_type coord(geometry::get<Index, Dimension>(*b)); |
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boost::ignore_unused_variable_warning(coord); |
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dimension_checker<Index, Dimension + 1, DimensionCount>::apply(); |
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} |
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}; |
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template <std::size_t Index, std::size_t DimensionCount> |
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struct dimension_checker<Index, DimensionCount, DimensionCount> |
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{ |
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static void apply() {} |
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}; |
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public : |
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BOOST_CONCEPT_USAGE(ConstBox) |
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{ |
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static const std::size_t n = dimension<Geometry>::type::value; |
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dimension_checker<min_corner, 0, n>::apply(); |
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dimension_checker<max_corner, 0, n>::apply(); |
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} |
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#endif |
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}; |
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}}} // namespace boost::geometry::concept |
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#endif // BOOST_GEOMETRY_GEOMETRIES_CONCEPTS_BOX_CONCEPT_HPP
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