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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
// This file was modified by Oracle on 2014, 2017.
// Modifications copyright (c) 2014-2017, Oracle and/or its affiliates.
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
// 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_INTERSECTION_INTERFACE_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_INTERSECTION_INTERFACE_HPP
#include <boost/variant/apply_visitor.hpp>
#include <boost/variant/static_visitor.hpp>
#include <boost/variant/variant_fwd.hpp>
#include <boost/geometry/algorithms/detail/overlay/intersection_insert.hpp>
#include <boost/geometry/policies/robustness/get_rescale_policy.hpp>
#include <boost/geometry/strategies/default_strategy.hpp>
#include <boost/geometry/util/range.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
// By default, all is forwarded to the intersection_insert-dispatcher
template
<
typename Geometry1, typename Geometry2,
typename Tag1 = typename geometry::tag<Geometry1>::type,
typename Tag2 = typename geometry::tag<Geometry2>::type,
bool Reverse = reverse_dispatch<Geometry1, Geometry2>::type::value
>
struct intersection
{
template <typename RobustPolicy, typename GeometryOut, typename Strategy>
static inline bool apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
GeometryOut& geometry_out,
Strategy const& strategy)
{
typedef typename boost::range_value<GeometryOut>::type OneOut;
intersection_insert
<
Geometry1, Geometry2, OneOut,
overlay_intersection
>::apply(geometry1, geometry2, robust_policy,
range::back_inserter(geometry_out), strategy);
return true;
}
};
// If reversal is needed, perform it
template
<
typename Geometry1, typename Geometry2,
typename Tag1, typename Tag2
>
struct intersection
<
Geometry1, Geometry2,
Tag1, Tag2,
true
>
: intersection<Geometry2, Geometry1, Tag2, Tag1, false>
{
template <typename RobustPolicy, typename GeometryOut, typename Strategy>
static inline bool apply(
Geometry1 const& g1,
Geometry2 const& g2,
RobustPolicy const& robust_policy,
GeometryOut& out,
Strategy const& strategy)
{
return intersection
<
Geometry2, Geometry1,
Tag2, Tag1,
false
>::apply(g2, g1, robust_policy, out, strategy);
}
};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
namespace resolve_strategy {
struct intersection
{
template
<
typename Geometry1,
typename Geometry2,
typename RobustPolicy,
typename GeometryOut,
typename Strategy
>
static inline bool apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
GeometryOut & geometry_out,
Strategy const& strategy)
{
return dispatch::intersection
<
Geometry1,
Geometry2
>::apply(geometry1, geometry2, robust_policy, geometry_out,
strategy);
}
template
<
typename Geometry1,
typename Geometry2,
typename RobustPolicy,
typename GeometryOut
>
static inline bool apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
GeometryOut & geometry_out,
default_strategy)
{
typedef typename strategy::relate::services::default_strategy
<
Geometry1, Geometry2
>::type strategy_type;
return dispatch::intersection
<
Geometry1,
Geometry2
>::apply(geometry1, geometry2, robust_policy, geometry_out,
strategy_type());
}
};
} // resolve_strategy
namespace resolve_variant
{
template <typename Geometry1, typename Geometry2>
struct intersection
{
template <typename GeometryOut, typename Strategy>
static inline bool apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
GeometryOut& geometry_out,
Strategy const& strategy)
{
concepts::check<Geometry1 const>();
concepts::check<Geometry2 const>();
typedef typename geometry::rescale_overlay_policy_type
<
Geometry1,
Geometry2
>::type rescale_policy_type;
rescale_policy_type robust_policy
= geometry::get_rescale_policy<rescale_policy_type>(geometry1,
geometry2);
return resolve_strategy::intersection::apply(geometry1,
geometry2,
robust_policy,
geometry_out,
strategy);
}
};
template <BOOST_VARIANT_ENUM_PARAMS(typename T), typename Geometry2>
struct intersection<variant<BOOST_VARIANT_ENUM_PARAMS(T)>, Geometry2>
{
template <typename GeometryOut, typename Strategy>
struct visitor: static_visitor<bool>
{
Geometry2 const& m_geometry2;
GeometryOut& m_geometry_out;
Strategy const& m_strategy;
visitor(Geometry2 const& geometry2,
GeometryOut& geometry_out,
Strategy const& strategy)
: m_geometry2(geometry2)
, m_geometry_out(geometry_out)
, m_strategy(strategy)
{}
template <typename Geometry1>
bool operator()(Geometry1 const& geometry1) const
{
return intersection
<
Geometry1,
Geometry2
>::apply(geometry1, m_geometry2, m_geometry_out, m_strategy);
}
};
template <typename GeometryOut, typename Strategy>
static inline bool
apply(variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry1,
Geometry2 const& geometry2,
GeometryOut& geometry_out,
Strategy const& strategy)
{
return boost::apply_visitor(visitor<GeometryOut, Strategy>(geometry2,
geometry_out,
strategy),
geometry1);
}
};
template <typename Geometry1, BOOST_VARIANT_ENUM_PARAMS(typename T)>
struct intersection<Geometry1, variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
{
template <typename GeometryOut, typename Strategy>
struct visitor: static_visitor<bool>
{
Geometry1 const& m_geometry1;
GeometryOut& m_geometry_out;
Strategy const& m_strategy;
visitor(Geometry1 const& geometry1,
GeometryOut& geometry_out,
Strategy const& strategy)
: m_geometry1(geometry1)
, m_geometry_out(geometry_out)
, m_strategy(strategy)
{}
template <typename Geometry2>
bool operator()(Geometry2 const& geometry2) const
{
return intersection
<
Geometry1,
Geometry2
>::apply(m_geometry1, geometry2, m_geometry_out, m_strategy);
}
};
template <typename GeometryOut, typename Strategy>
static inline bool
apply(Geometry1 const& geometry1,
variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry2,
GeometryOut& geometry_out,
Strategy const& strategy)
{
return boost::apply_visitor(visitor<GeometryOut, Strategy>(geometry1,
geometry_out,
strategy),
geometry2);
}
};
template <BOOST_VARIANT_ENUM_PARAMS(typename T1), BOOST_VARIANT_ENUM_PARAMS(typename T2)>
struct intersection<variant<BOOST_VARIANT_ENUM_PARAMS(T1)>, variant<BOOST_VARIANT_ENUM_PARAMS(T2)> >
{
template <typename GeometryOut, typename Strategy>
struct visitor: static_visitor<bool>
{
GeometryOut& m_geometry_out;
Strategy const& m_strategy;
visitor(GeometryOut& geometry_out, Strategy const& strategy)
: m_geometry_out(geometry_out)
, m_strategy(strategy)
{}
template <typename Geometry1, typename Geometry2>
bool operator()(Geometry1 const& geometry1,
Geometry2 const& geometry2) const
{
return intersection
<
Geometry1,
Geometry2
>::apply(geometry1, geometry2, m_geometry_out, m_strategy);
}
};
template <typename GeometryOut, typename Strategy>
static inline bool
apply(variant<BOOST_VARIANT_ENUM_PARAMS(T1)> const& geometry1,
variant<BOOST_VARIANT_ENUM_PARAMS(T2)> const& geometry2,
GeometryOut& geometry_out,
Strategy const& strategy)
{
return boost::apply_visitor(visitor<GeometryOut, Strategy>(geometry_out,
strategy),
geometry1, geometry2);
}
};
} // namespace resolve_variant
/*!
\brief \brief_calc2{intersection}
\ingroup intersection
\details \details_calc2{intersection, spatial set theoretic intersection}.
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\tparam GeometryOut Collection of geometries (e.g. std::vector, std::deque, boost::geometry::multi*) of which
the value_type fulfills a \p_l_or_c concept, or it is the output geometry (e.g. for a box)
\tparam Strategy \tparam_strategy{Intersection}
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param geometry_out The output geometry, either a multi_point, multi_polygon,
multi_linestring, or a box (for intersection of two boxes)
\param strategy \param_strategy{intersection}
\qbk{distinguish,with strategy}
\qbk{[include reference/algorithms/intersection.qbk]}
*/
template
<
typename Geometry1,
typename Geometry2,
typename GeometryOut,
typename Strategy
>
inline bool intersection(Geometry1 const& geometry1,
Geometry2 const& geometry2,
GeometryOut& geometry_out,
Strategy const& strategy)
{
return resolve_variant::intersection
<
Geometry1,
Geometry2
>::apply(geometry1, geometry2, geometry_out, strategy);
}
/*!
\brief \brief_calc2{intersection}
\ingroup intersection
\details \details_calc2{intersection, spatial set theoretic intersection}.
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\tparam GeometryOut Collection of geometries (e.g. std::vector, std::deque, boost::geometry::multi*) of which
the value_type fulfills a \p_l_or_c concept, or it is the output geometry (e.g. for a box)
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param geometry_out The output geometry, either a multi_point, multi_polygon,
multi_linestring, or a box (for intersection of two boxes)
\qbk{[include reference/algorithms/intersection.qbk]}
*/
template
<
typename Geometry1,
typename Geometry2,
typename GeometryOut
>
inline bool intersection(Geometry1 const& geometry1,
Geometry2 const& geometry2,
GeometryOut& geometry_out)
{
return resolve_variant::intersection
<
Geometry1,
Geometry2
>::apply(geometry1, geometry2, geometry_out, default_strategy());
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_INTERSECTION_INTERFACE_HPP
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