mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-22 21:01:31 +03:00
225 lines
6.4 KiB
C++
225 lines
6.4 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.
|
|
|
|
// 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_GEOMETRIES_SEGMENT_HPP
|
|
#define BOOST_GEOMETRY_GEOMETRIES_SEGMENT_HPP
|
|
|
|
#include <cstddef>
|
|
|
|
#include <boost/concept/assert.hpp>
|
|
#include <boost/mpl/if.hpp>
|
|
#include <boost/type_traits/is_const.hpp>
|
|
|
|
#include <boost/geometry/geometries/concepts/point_concept.hpp>
|
|
|
|
namespace boost { namespace geometry
|
|
{
|
|
|
|
namespace model
|
|
{
|
|
|
|
/*!
|
|
\brief Class segment: small class containing two points
|
|
\ingroup geometries
|
|
\details From Wikipedia: In geometry, a line segment is a part of a line that is bounded
|
|
by two distinct end points, and contains every point on the line between its end points.
|
|
\note There is also a point-referring-segment, class referring_segment,
|
|
containing point references, where points are NOT copied
|
|
|
|
\qbk{[include reference/geometries/segment.qbk]}
|
|
\qbk{before.synopsis,
|
|
[heading Model of]
|
|
[link geometry.reference.concepts.concept_segment Segment Concept]
|
|
}
|
|
*/
|
|
template<typename Point>
|
|
class segment : public std::pair<Point, Point>
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (concepts::Point<Point>) );
|
|
|
|
public :
|
|
|
|
#ifndef BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
|
|
/// \constructor_default_no_init
|
|
segment() = default;
|
|
#else
|
|
/// \constructor_default_no_init
|
|
inline segment()
|
|
{}
|
|
#endif
|
|
|
|
/*!
|
|
\brief Constructor taking the first and the second point
|
|
*/
|
|
inline segment(Point const& p1, Point const& p2)
|
|
{
|
|
this->first = p1;
|
|
this->second = p2;
|
|
}
|
|
};
|
|
|
|
|
|
/*!
|
|
\brief Class segment: small class containing two (templatized) point references
|
|
\ingroup geometries
|
|
\details From Wikipedia: In geometry, a line segment is a part of a line that is bounded
|
|
by two distinct end points, and contains every point on the line between its end points.
|
|
\note The structure is like std::pair, and can often be used interchangeable.
|
|
Difference is that it refers to points, does not have points.
|
|
\note Like std::pair, points are public available.
|
|
\note type is const or non const, so geometry::segment<P> or geometry::segment<P const>
|
|
\note We cannot derive from std::pair<P&, P&> because of
|
|
reference assignments.
|
|
\tparam ConstOrNonConstPoint point type of the segment, maybe a point or a const point
|
|
*/
|
|
template<typename ConstOrNonConstPoint>
|
|
class referring_segment
|
|
{
|
|
BOOST_CONCEPT_ASSERT( (
|
|
typename boost::mpl::if_
|
|
<
|
|
boost::is_const<ConstOrNonConstPoint>,
|
|
concepts::Point<ConstOrNonConstPoint>,
|
|
concepts::ConstPoint<ConstOrNonConstPoint>
|
|
>
|
|
) );
|
|
|
|
typedef ConstOrNonConstPoint point_type;
|
|
|
|
public:
|
|
|
|
point_type& first;
|
|
point_type& second;
|
|
|
|
/*!
|
|
\brief Constructor taking the first and the second point
|
|
*/
|
|
inline referring_segment(point_type& p1, point_type& p2)
|
|
: first(p1)
|
|
, second(p2)
|
|
{}
|
|
};
|
|
|
|
|
|
} // namespace model
|
|
|
|
|
|
// Traits specializations for segment above
|
|
#ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS
|
|
namespace traits
|
|
{
|
|
|
|
template <typename Point>
|
|
struct tag<model::segment<Point> >
|
|
{
|
|
typedef segment_tag type;
|
|
};
|
|
|
|
template <typename Point>
|
|
struct point_type<model::segment<Point> >
|
|
{
|
|
typedef Point type;
|
|
};
|
|
|
|
template <typename Point, std::size_t Dimension>
|
|
struct indexed_access<model::segment<Point>, 0, Dimension>
|
|
{
|
|
typedef model::segment<Point> segment_type;
|
|
typedef typename geometry::coordinate_type<segment_type>::type coordinate_type;
|
|
|
|
static inline coordinate_type get(segment_type const& s)
|
|
{
|
|
return geometry::get<Dimension>(s.first);
|
|
}
|
|
|
|
static inline void set(segment_type& s, coordinate_type const& value)
|
|
{
|
|
geometry::set<Dimension>(s.first, value);
|
|
}
|
|
};
|
|
|
|
|
|
template <typename Point, std::size_t Dimension>
|
|
struct indexed_access<model::segment<Point>, 1, Dimension>
|
|
{
|
|
typedef model::segment<Point> segment_type;
|
|
typedef typename geometry::coordinate_type<segment_type>::type coordinate_type;
|
|
|
|
static inline coordinate_type get(segment_type const& s)
|
|
{
|
|
return geometry::get<Dimension>(s.second);
|
|
}
|
|
|
|
static inline void set(segment_type& s, coordinate_type const& value)
|
|
{
|
|
geometry::set<Dimension>(s.second, value);
|
|
}
|
|
};
|
|
|
|
|
|
template <typename ConstOrNonConstPoint>
|
|
struct tag<model::referring_segment<ConstOrNonConstPoint> >
|
|
{
|
|
typedef segment_tag type;
|
|
};
|
|
|
|
template <typename ConstOrNonConstPoint>
|
|
struct point_type<model::referring_segment<ConstOrNonConstPoint> >
|
|
{
|
|
typedef ConstOrNonConstPoint type;
|
|
};
|
|
|
|
template <typename ConstOrNonConstPoint, std::size_t Dimension>
|
|
struct indexed_access<model::referring_segment<ConstOrNonConstPoint>, 0, Dimension>
|
|
{
|
|
typedef model::referring_segment<ConstOrNonConstPoint> segment_type;
|
|
typedef typename geometry::coordinate_type<segment_type>::type coordinate_type;
|
|
|
|
static inline coordinate_type get(segment_type const& s)
|
|
{
|
|
return geometry::get<Dimension>(s.first);
|
|
}
|
|
|
|
static inline void set(segment_type& s, coordinate_type const& value)
|
|
{
|
|
geometry::set<Dimension>(s.first, value);
|
|
}
|
|
};
|
|
|
|
|
|
template <typename ConstOrNonConstPoint, std::size_t Dimension>
|
|
struct indexed_access<model::referring_segment<ConstOrNonConstPoint>, 1, Dimension>
|
|
{
|
|
typedef model::referring_segment<ConstOrNonConstPoint> segment_type;
|
|
typedef typename geometry::coordinate_type<segment_type>::type coordinate_type;
|
|
|
|
static inline coordinate_type get(segment_type const& s)
|
|
{
|
|
return geometry::get<Dimension>(s.second);
|
|
}
|
|
|
|
static inline void set(segment_type& s, coordinate_type const& value)
|
|
{
|
|
geometry::set<Dimension>(s.second, value);
|
|
}
|
|
};
|
|
|
|
|
|
|
|
} // namespace traits
|
|
#endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS
|
|
|
|
}} // namespace boost::geometry
|
|
|
|
#endif // BOOST_GEOMETRY_GEOMETRIES_SEGMENT_HPP
|