// Boost.Geometry (aka GGL, Generic Geometry Library)
|
|
// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
|
// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
|
// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
|
// Copyright (c) 2013-2015 Adam Wulkiewicz, Lodz, Poland.
|
|
// This file was modified by Oracle on 2013, 2014, 2015, 2017.
|
// Modifications copyright (c) 2013-2017, 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_ALGORITHMS_DETAIL_TOUCHES_INTERFACE_HPP
|
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_TOUCHES_INTERFACE_HPP
|
|
|
#include <deque>
|
|
#include <boost/variant/apply_visitor.hpp>
|
#include <boost/variant/static_visitor.hpp>
|
#include <boost/variant/variant_fwd.hpp>
|
|
#include <boost/geometry/core/reverse_dispatch.hpp>
|
#include <boost/geometry/core/tag.hpp>
|
#include <boost/geometry/core/tag_cast.hpp>
|
#include <boost/geometry/core/tags.hpp>
|
|
#include <boost/geometry/geometries/concepts/check.hpp>
|
|
#include <boost/geometry/strategies/default_strategy.hpp>
|
#include <boost/geometry/strategies/relate.hpp>
|
|
|
namespace boost { namespace geometry
|
{
|
|
#ifndef DOXYGEN_NO_DISPATCH
|
namespace dispatch {
|
|
// TODO: Since CastedTags are used is Reverse needed?
|
|
template
|
<
|
typename Geometry1,
|
typename Geometry2,
|
typename Tag1 = typename tag<Geometry1>::type,
|
typename Tag2 = typename tag<Geometry2>::type,
|
typename CastedTag1 = typename tag_cast<Tag1, pointlike_tag, linear_tag, areal_tag>::type,
|
typename CastedTag2 = typename tag_cast<Tag2, pointlike_tag, linear_tag, areal_tag>::type,
|
bool Reverse = reverse_dispatch<Geometry1, Geometry2>::type::value
|
>
|
struct touches
|
: not_implemented<Tag1, Tag2>
|
{};
|
|
// If reversal is needed, perform it
|
template
|
<
|
typename Geometry1, typename Geometry2,
|
typename Tag1, typename Tag2,
|
typename CastedTag1, typename CastedTag2
|
>
|
struct touches<Geometry1, Geometry2, Tag1, Tag2, CastedTag1, CastedTag2, true>
|
: touches<Geometry2, Geometry1, Tag2, Tag1, CastedTag2, CastedTag1, false>
|
{
|
template <typename Strategy>
|
static inline bool apply(Geometry1 const& g1, Geometry2 const& g2, Strategy const& strategy)
|
{
|
return touches<Geometry2, Geometry1>::apply(g2, g1, strategy);
|
}
|
};
|
|
} // namespace dispatch
|
#endif // DOXYGEN_NO_DISPATCH
|
|
|
namespace resolve_strategy
|
{
|
|
struct touches
|
{
|
template <typename Geometry1, typename Geometry2, typename Strategy>
|
static inline bool apply(Geometry1 const& geometry1,
|
Geometry2 const& geometry2,
|
Strategy const& strategy)
|
{
|
return dispatch::touches
|
<
|
Geometry1, Geometry2
|
>::apply(geometry1, geometry2, strategy);
|
}
|
|
template <typename Geometry1, typename Geometry2>
|
static inline bool apply(Geometry1 const& geometry1,
|
Geometry2 const& geometry2,
|
default_strategy)
|
{
|
typedef typename strategy::relate::services::default_strategy
|
<
|
Geometry1,
|
Geometry2
|
>::type strategy_type;
|
|
return dispatch::touches
|
<
|
Geometry1, Geometry2
|
>::apply(geometry1, geometry2, strategy_type());
|
}
|
};
|
|
} // namespace resolve_strategy
|
|
|
namespace resolve_variant {
|
|
template <typename Geometry1, typename Geometry2>
|
struct touches
|
{
|
template <typename Strategy>
|
static bool apply(Geometry1 const& geometry1, Geometry2 const& geometry2, Strategy const& strategy)
|
{
|
concepts::check<Geometry1 const>();
|
concepts::check<Geometry2 const>();
|
|
return resolve_strategy::touches::apply(geometry1, geometry2, strategy);
|
}
|
};
|
|
template <BOOST_VARIANT_ENUM_PARAMS(typename T), typename Geometry2>
|
struct touches<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>, Geometry2>
|
{
|
template <typename Strategy>
|
struct visitor: boost::static_visitor<bool>
|
{
|
Geometry2 const& m_geometry2;
|
Strategy const& m_strategy;
|
|
visitor(Geometry2 const& geometry2, Strategy const& strategy)
|
: m_geometry2(geometry2)
|
, m_strategy(strategy)
|
{}
|
|
template <typename Geometry1>
|
bool operator()(Geometry1 const& geometry1) const
|
{
|
return touches<Geometry1, Geometry2>::apply(geometry1, m_geometry2, m_strategy);
|
}
|
};
|
|
template <typename Strategy>
|
static inline bool apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry1,
|
Geometry2 const& geometry2,
|
Strategy const& strategy)
|
{
|
return boost::apply_visitor(visitor<Strategy>(geometry2, strategy), geometry1);
|
}
|
};
|
|
template <typename Geometry1, BOOST_VARIANT_ENUM_PARAMS(typename T)>
|
struct touches<Geometry1, boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
|
{
|
template <typename Strategy>
|
struct visitor: boost::static_visitor<bool>
|
{
|
Geometry1 const& m_geometry1;
|
Strategy const& m_strategy;
|
|
visitor(Geometry1 const& geometry1, Strategy const& strategy)
|
: m_geometry1(geometry1)
|
, m_strategy(strategy)
|
{}
|
|
template <typename Geometry2>
|
bool operator()(Geometry2 const& geometry2) const
|
{
|
return touches<Geometry1, Geometry2>::apply(m_geometry1, geometry2, m_strategy);
|
}
|
};
|
|
template <typename Strategy>
|
static inline bool apply(Geometry1 const& geometry1,
|
boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry2,
|
Strategy const& strategy)
|
{
|
return boost::apply_visitor(visitor<Strategy>(geometry1, strategy), geometry2);
|
}
|
};
|
|
template <BOOST_VARIANT_ENUM_PARAMS(typename T1),
|
BOOST_VARIANT_ENUM_PARAMS(typename T2)>
|
struct touches<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T1)>,
|
boost::variant<BOOST_VARIANT_ENUM_PARAMS(T2)> >
|
{
|
template <typename Strategy>
|
struct visitor: boost::static_visitor<bool>
|
{
|
Strategy const& m_strategy;
|
|
visitor(Strategy const& strategy)
|
: m_strategy(strategy)
|
{}
|
|
template <typename Geometry1, typename Geometry2>
|
bool operator()(Geometry1 const& geometry1,
|
Geometry2 const& geometry2) const
|
{
|
return touches<Geometry1, Geometry2>::apply(geometry1, geometry2, m_strategy);
|
}
|
};
|
|
template <typename Strategy>
|
static inline bool apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T1)> const& geometry1,
|
boost::variant<BOOST_VARIANT_ENUM_PARAMS(T2)> const& geometry2,
|
Strategy const& strategy)
|
{
|
return boost::apply_visitor(visitor<Strategy>(strategy), geometry1, geometry2);
|
}
|
};
|
|
template <typename Geometry>
|
struct self_touches;
|
|
template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
|
struct self_touches<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
|
{
|
struct visitor: boost::static_visitor<bool>
|
{
|
template <typename Geometry>
|
bool operator()(Geometry const& geometry) const
|
{
|
return self_touches<Geometry>::apply(geometry);
|
}
|
};
|
|
static inline bool
|
apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry)
|
{
|
return boost::apply_visitor(visitor(), geometry);
|
}
|
};
|
|
} // namespace resolve_variant
|
|
|
/*!
|
\brief \brief_check{has at least one touching point (self-tangency)}
|
\note This function can be called for one geometry (self-tangency) and
|
also for two geometries (touch)
|
\ingroup touches
|
\tparam Geometry \tparam_geometry
|
\param geometry \param_geometry
|
\return \return_check{is self-touching}
|
|
\qbk{distinguish,one geometry}
|
\qbk{[def __one_parameter__]}
|
\qbk{[include reference/algorithms/touches.qbk]}
|
\qbk{
|
[heading Examples]
|
[touches_one_geometry]
|
[touches_one_geometry_output]
|
}
|
*/
|
template <typename Geometry>
|
inline bool touches(Geometry const& geometry)
|
{
|
return resolve_variant::self_touches<Geometry>::apply(geometry);
|
}
|
|
|
/*!
|
\brief \brief_check2{have at least one touching point (tangent - non overlapping)}
|
\ingroup touches
|
\tparam Geometry1 \tparam_geometry
|
\tparam Geometry2 \tparam_geometry
|
\param geometry1 \param_geometry
|
\param geometry2 \param_geometry
|
\return \return_check2{touch each other}
|
|
\qbk{distinguish,two geometries}
|
\qbk{[include reference/algorithms/touches.qbk]}
|
\qbk{
|
[heading Examples]
|
[touches_two_geometries]
|
[touches_two_geometries_output]
|
}
|
*/
|
template <typename Geometry1, typename Geometry2>
|
inline bool touches(Geometry1 const& geometry1, Geometry2 const& geometry2)
|
{
|
return resolve_variant::touches
|
<
|
Geometry1, Geometry2
|
>::apply(geometry1, geometry2, default_strategy());
|
}
|
|
/*!
|
\brief \brief_check2{have at least one touching point (tangent - non overlapping)}
|
\ingroup touches
|
\tparam Geometry1 \tparam_geometry
|
\tparam Geometry2 \tparam_geometry
|
\tparam Strategy \tparam_strategy{Touches}
|
\param geometry1 \param_geometry
|
\param geometry2 \param_geometry
|
\param strategy \param_strategy{touches}
|
\return \return_check2{touch each other}
|
|
\qbk{distinguish,with strategy}
|
\qbk{[include reference/algorithms/touches.qbk]}
|
*/
|
template <typename Geometry1, typename Geometry2, typename Strategy>
|
inline bool touches(Geometry1 const& geometry1,
|
Geometry2 const& geometry2,
|
Strategy const& strategy)
|
{
|
return resolve_variant::touches
|
<
|
Geometry1, Geometry2
|
>::apply(geometry1, geometry2, strategy);
|
}
|
|
|
}} // namespace boost::geometry
|
|
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_TOUCHES_INTERFACE_HPP
|
