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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 2017-2021.
// Modifications copyright (c) 2017-2021, 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_DIFFERENCE_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DIFFERENCE_HPP
#include <boost/variant/apply_visitor.hpp>
#include <boost/variant/static_visitor.hpp>
#include <boost/variant/variant_fwd.hpp>
#include <boost/geometry/algorithms/detail/intersection/multi.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/strategies/detail.hpp>
#include <boost/geometry/strategies/relate/cartesian.hpp>
#include <boost/geometry/strategies/relate/geographic.hpp>
#include <boost/geometry/strategies/relate/spherical.hpp>
#include <boost/geometry/util/range.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace difference
{
template
<
typename Geometry1,
typename Geometry2,
typename SingleOut,
typename OutTag = typename detail::setop_insert_output_tag<SingleOut>::type,
bool ReturnGeometry1 = (topological_dimension<Geometry1>::value
> topological_dimension<Geometry2>::value)
>
struct call_intersection_insert
{
template
<
typename OutputIterator,
typename RobustPolicy,
typename Strategy
>
static inline OutputIterator apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
OutputIterator out,
Strategy const& strategy)
{
return geometry::dispatch::intersection_insert
<
Geometry1, Geometry2,
SingleOut,
overlay_difference,
geometry::detail::overlay::do_reverse<geometry::point_order<Geometry1>::value>::value,
geometry::detail::overlay::do_reverse<geometry::point_order<Geometry2>::value, true>::value
>::apply(geometry1, geometry2, robust_policy, out, strategy);
}
};
template
<
typename Geometry1,
typename Geometry2,
typename SingleOut
>
struct call_intersection_insert_tupled_base
{
typedef typename geometry::detail::single_tag_from_base_tag
<
typename geometry::tag_cast
<
typename geometry::tag<Geometry1>::type,
pointlike_tag, linear_tag, areal_tag
>::type
>::type single_tag;
typedef detail::expect_output
<
Geometry1, Geometry2, SingleOut, single_tag
> expect_check;
typedef typename geometry::detail::output_geometry_access
<
SingleOut, single_tag, single_tag
> access;
};
template
<
typename Geometry1,
typename Geometry2,
typename SingleOut
>
struct call_intersection_insert
<
Geometry1, Geometry2, SingleOut,
detail::tupled_output_tag,
false
>
: call_intersection_insert_tupled_base<Geometry1, Geometry2, SingleOut>
{
typedef call_intersection_insert_tupled_base<Geometry1, Geometry2, SingleOut> base_t;
template
<
typename OutputIterator,
typename RobustPolicy,
typename Strategy
>
static inline OutputIterator apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
OutputIterator out,
Strategy const& strategy)
{
base_t::access::get(out) = call_intersection_insert
<
Geometry1, Geometry2,
typename base_t::access::type
>::apply(geometry1, geometry2, robust_policy,
base_t::access::get(out), strategy);
return out;
}
};
template
<
typename Geometry1,
typename Geometry2,
typename SingleOut
>
struct call_intersection_insert
<
Geometry1, Geometry2, SingleOut,
detail::tupled_output_tag,
true
>
: call_intersection_insert_tupled_base<Geometry1, Geometry2, SingleOut>
{
typedef call_intersection_insert_tupled_base<Geometry1, Geometry2, SingleOut> base_t;
template
<
typename OutputIterator,
typename RobustPolicy,
typename Strategy
>
static inline OutputIterator apply(Geometry1 const& geometry1,
Geometry2 const& ,
RobustPolicy const& ,
OutputIterator out,
Strategy const& )
{
base_t::access::get(out) = geometry::detail::convert_to_output
<
Geometry1,
typename base_t::access::type
>::apply(geometry1, base_t::access::get(out));
return out;
}
};
/*!
\brief_calc2{difference} \brief_strategy
\ingroup difference
\details \details_calc2{difference_insert, spatial set theoretic difference}
\brief_strategy. \details_inserter{difference}
\tparam GeometryOut output geometry type, must be specified
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\tparam OutputIterator output iterator
\tparam Strategy \tparam_strategy_overlay
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param out \param_out{difference}
\param strategy \param_strategy{difference}
\return \return_out
\qbk{distinguish,with strategy}
*/
template
<
typename GeometryOut,
typename Geometry1,
typename Geometry2,
typename OutputIterator,
typename Strategy
>
inline OutputIterator difference_insert(Geometry1 const& geometry1,
Geometry2 const& geometry2,
OutputIterator out,
Strategy const& strategy)
{
concepts::check<Geometry1 const>();
concepts::check<Geometry2 const>();
//concepts::check<GeometryOut>();
geometry::detail::output_geometry_concept_check<GeometryOut>::apply();
typedef typename geometry::rescale_overlay_policy_type
<
Geometry1,
Geometry2,
typename Strategy::cs_tag
>::type rescale_policy_type;
rescale_policy_type robust_policy
= geometry::get_rescale_policy<rescale_policy_type>(
geometry1, geometry2, strategy);
return geometry::detail::difference::call_intersection_insert
<
Geometry1, Geometry2, GeometryOut
>::apply(geometry1, geometry2, robust_policy, out, strategy);
}
/*!
\brief_calc2{difference}
\ingroup difference
\details \details_calc2{difference_insert, spatial set theoretic difference}.
\details_insert{difference}
\tparam GeometryOut output geometry type, must be specified
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\tparam OutputIterator output iterator
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param out \param_out{difference}
\return \return_out
\qbk{[include reference/algorithms/difference_insert.qbk]}
*/
template
<
typename GeometryOut,
typename Geometry1,
typename Geometry2,
typename OutputIterator
>
inline OutputIterator difference_insert(Geometry1 const& geometry1,
Geometry2 const& geometry2,
OutputIterator out)
{
typedef typename strategies::relate::services::default_strategy
<
Geometry1,
Geometry2
>::type strategy_type;
return difference_insert<GeometryOut>(geometry1, geometry2, out,
strategy_type());
}
}} // namespace detail::difference
#endif // DOXYGEN_NO_DETAIL
namespace resolve_strategy {
template
<
typename Strategy,
bool IsUmbrella = strategies::detail::is_umbrella_strategy<Strategy>::value
>
struct difference
{
template <typename Geometry1, typename Geometry2, typename Collection>
static inline void apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
Collection & output_collection,
Strategy const& strategy)
{
typedef typename geometry::detail::output_geometry_value
<
Collection
>::type single_out;
detail::difference::difference_insert<single_out>(
geometry1, geometry2,
geometry::detail::output_geometry_back_inserter(output_collection),
strategy);
}
};
template <typename Strategy>
struct difference<Strategy, false>
{
template <typename Geometry1, typename Geometry2, typename Collection>
static inline void apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
Collection & output_collection,
Strategy const& strategy)
{
using strategies::relate::services::strategy_converter;
difference
<
decltype(strategy_converter<Strategy>::get(strategy))
>::apply(geometry1, geometry2, output_collection,
strategy_converter<Strategy>::get(strategy));
}
};
template <>
struct difference<default_strategy, false>
{
template <typename Geometry1, typename Geometry2, typename Collection>
static inline void apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
Collection & output_collection,
default_strategy)
{
typedef typename strategies::relate::services::default_strategy
<
Geometry1,
Geometry2
>::type strategy_type;
difference
<
strategy_type
>::apply(geometry1, geometry2, output_collection, strategy_type());
}
};
} // resolve_strategy
namespace resolve_variant
{
template <typename Geometry1, typename Geometry2>
struct difference
{
template <typename Collection, typename Strategy>
static inline void apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
Collection& output_collection,
Strategy const& strategy)
{
resolve_strategy::difference
<
Strategy
>::apply(geometry1, geometry2, output_collection, strategy);
}
};
template <BOOST_VARIANT_ENUM_PARAMS(typename T), typename Geometry2>
struct difference<variant<BOOST_VARIANT_ENUM_PARAMS(T)>, Geometry2>
{
template <typename Collection, typename Strategy>
struct visitor: static_visitor<>
{
Geometry2 const& m_geometry2;
Collection& m_output_collection;
Strategy const& m_strategy;
visitor(Geometry2 const& geometry2,
Collection& output_collection,
Strategy const& strategy)
: m_geometry2(geometry2)
, m_output_collection(output_collection)
, m_strategy(strategy)
{}
template <typename Geometry1>
void operator()(Geometry1 const& geometry1) const
{
difference
<
Geometry1,
Geometry2
>::apply(geometry1, m_geometry2, m_output_collection, m_strategy);
}
};
template <typename Collection, typename Strategy>
static inline void
apply(variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry1,
Geometry2 const& geometry2,
Collection& output_collection,
Strategy const& strategy)
{
boost::apply_visitor(visitor<Collection, Strategy>(geometry2,
output_collection,
strategy),
geometry1);
}
};
template <typename Geometry1, BOOST_VARIANT_ENUM_PARAMS(typename T)>
struct difference<Geometry1, variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
{
template <typename Collection, typename Strategy>
struct visitor: static_visitor<>
{
Geometry1 const& m_geometry1;
Collection& m_output_collection;
Strategy const& m_strategy;
visitor(Geometry1 const& geometry1,
Collection& output_collection,
Strategy const& strategy)
: m_geometry1(geometry1)
, m_output_collection(output_collection)
, m_strategy(strategy)
{}
template <typename Geometry2>
void operator()(Geometry2 const& geometry2) const
{
difference
<
Geometry1,
Geometry2
>::apply(m_geometry1, geometry2, m_output_collection, m_strategy);
}
};
template <typename Collection, typename Strategy>
static inline void
apply(Geometry1 const& geometry1,
variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry2,
Collection& output_collection,
Strategy const& strategy)
{
boost::apply_visitor(visitor<Collection, Strategy>(geometry1,
output_collection,
strategy),
geometry2);
}
};
template <BOOST_VARIANT_ENUM_PARAMS(typename T1), BOOST_VARIANT_ENUM_PARAMS(typename T2)>
struct difference<variant<BOOST_VARIANT_ENUM_PARAMS(T1)>, variant<BOOST_VARIANT_ENUM_PARAMS(T2)> >
{
template <typename Collection, typename Strategy>
struct visitor: static_visitor<>
{
Collection& m_output_collection;
Strategy const& m_strategy;
visitor(Collection& output_collection, Strategy const& strategy)
: m_output_collection(output_collection)
, m_strategy(strategy)
{}
template <typename Geometry1, typename Geometry2>
void operator()(Geometry1 const& geometry1,
Geometry2 const& geometry2) const
{
difference
<
Geometry1,
Geometry2
>::apply(geometry1, geometry2, m_output_collection, m_strategy);
}
};
template <typename Collection, typename Strategy>
static inline void
apply(variant<BOOST_VARIANT_ENUM_PARAMS(T1)> const& geometry1,
variant<BOOST_VARIANT_ENUM_PARAMS(T2)> const& geometry2,
Collection& output_collection,
Strategy const& strategy)
{
boost::apply_visitor(visitor<Collection, Strategy>(output_collection,
strategy),
geometry1, geometry2);
}
};
} // namespace resolve_variant
/*!
\brief_calc2{difference}
\ingroup difference
\details \details_calc2{difference, spatial set theoretic difference}.
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\tparam Collection \tparam_output_collection
\tparam Strategy \tparam_strategy{Difference}
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param output_collection the output collection
\param strategy \param_strategy{difference}
\qbk{distinguish,with strategy}
\qbk{[include reference/algorithms/difference.qbk]}
*/
template
<
typename Geometry1,
typename Geometry2,
typename Collection,
typename Strategy
>
inline void difference(Geometry1 const& geometry1,
Geometry2 const& geometry2,
Collection& output_collection,
Strategy const& strategy)
{
resolve_variant::difference
<
Geometry1,
Geometry2
>::apply(geometry1, geometry2, output_collection, strategy);
}
/*!
\brief_calc2{difference}
\ingroup difference
\details \details_calc2{difference, spatial set theoretic difference}.
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\tparam Collection \tparam_output_collection
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param output_collection the output collection
\qbk{[include reference/algorithms/difference.qbk]}
*/
template
<
typename Geometry1,
typename Geometry2,
typename Collection
>
inline void difference(Geometry1 const& geometry1,
Geometry2 const& geometry2,
Collection& output_collection)
{
resolve_variant::difference
<
Geometry1,
Geometry2
>::apply(geometry1, geometry2, output_collection, default_strategy());
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DIFFERENCE_HPP
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