109 lines
2.7 KiB
C++
109 lines
2.7 KiB
C++
|
// Boost.Geometry (aka GGL, Generic Geometry Library)
|
||
|
|
|
||
|
|
// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
|
||
|
|
// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
|
||
|
|
// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
|
||
|
|
|
||
|
|
// This file was modified by Oracle on 2020-2022.
|
||
|
|
// Modifications copyright (c) 2020-2022, Oracle and/or its affiliates.
|
||
|
|
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
|
||
|
|
|
||
|
|
// 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_CORE_TOPOLOGICAL_DIMENSION_HPP
|
||
|
|
#define BOOST_GEOMETRY_CORE_TOPOLOGICAL_DIMENSION_HPP
|
||
|
|
|
||
|
|
|
||
|
|
#include <type_traits>
|
||
|
|
|
||
|
|
#include <boost/geometry/core/tag.hpp>
|
||
|
|
#include <boost/geometry/core/tags.hpp>
|
||
|
|
|
||
|
|
|
||
|
|
namespace boost { namespace geometry
|
||
|
|
{
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef DOXYGEN_NO_DISPATCH
|
||
|
|
namespace core_dispatch
|
||
|
|
{
|
||
|
|
|
||
|
|
|
||
|
|
template <typename GeometryTag>
|
||
|
|
struct top_dim {};
|
||
|
|
|
||
|
|
|
||
|
|
template <>
|
||
|
|
struct top_dim<point_tag> : std::integral_constant<int, 0> {};
|
||
|
|
|
||
|
|
|
||
|
|
template <>
|
||
|
|
struct top_dim<linestring_tag> : std::integral_constant<int, 1> {};
|
||
|
|
|
||
|
|
|
||
|
|
template <>
|
||
|
|
struct top_dim<segment_tag> : std::integral_constant<int, 1> {};
|
||
|
|
|
||
|
|
|
||
|
|
// ring: topological dimension of two, but some people say: 1 !!
|
||
|
|
// NOTE: This is not OGC LinearRing!
|
||
|
|
template <>
|
||
|
|
struct top_dim<ring_tag> : std::integral_constant<int, 2> {};
|
||
|
|
|
||
|
|
|
||
|
|
// TODO: This is wrong! Boxes may have various topological dimensions
|
||
|
|
template <>
|
||
|
|
struct top_dim<box_tag> : std::integral_constant<int, 2> {};
|
||
|
|
|
||
|
|
|
||
|
|
template <>
|
||
|
|
struct top_dim<polygon_tag> : std::integral_constant<int, 2> {};
|
||
|
|
|
||
|
|
|
||
|
|
template <>
|
||
|
|
struct top_dim<multi_point_tag> : std::integral_constant<int, 0> {};
|
||
|
|
|
||
|
|
|
||
|
|
template <>
|
||
|
|
struct top_dim<multi_linestring_tag> : std::integral_constant<int, 1> {};
|
||
|
|
|
||
|
|
|
||
|
|
template <>
|
||
|
|
struct top_dim<multi_polygon_tag> : std::integral_constant<int, 2> {};
|
||
|
|
|
||
|
|
|
||
|
|
template <>
|
||
|
|
struct top_dim<geometry_collection_tag> : std::integral_constant<int, -1> {};
|
||
|
|
|
||
|
|
|
||
|
|
} // namespace core_dispatch
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief Meta-function returning the topological dimension of a geometry
|
||
|
|
\details The topological dimension defines a point as 0-dimensional,
|
||
|
|
a linestring as 1-dimensional,
|
||
|
|
and a ring or polygon as 2-dimensional.
|
||
|
|
\see http://www.math.okstate.edu/mathdept/dynamics/lecnotes/node36.html
|
||
|
|
\ingroup core
|
||
|
|
*/
|
||
|
|
template <typename Geometry>
|
||
|
|
struct topological_dimension
|
||
|
|
: core_dispatch::top_dim<typename tag<Geometry>::type> {};
|
||
|
|
|
||
|
|
|
||
|
|
}} // namespace boost::geometry
|
||
|
|
|
||
|
|
|
||
|
|
#endif // BOOST_GEOMETRY_CORE_TOPOLOGICAL_DIMENSION_HPP
|