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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
// This file was modified by Oracle on 2015, 2017.
// Modifications copyright (c) 2015-2017 Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// 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_SYM_DIFFERENCE_HPP
#define BOOST_GEOMETRY_ALGORITHMS_SYM_DIFFERENCE_HPP
#include <algorithm>
#include <iterator>
#include <vector>
#include <boost/variant/apply_visitor.hpp>
#include <boost/variant/static_visitor.hpp>
#include <boost/variant/variant_fwd.hpp>
#include <boost/geometry/algorithms/intersection.hpp>
#include <boost/geometry/algorithms/union.hpp>
#include <boost/geometry/geometries/multi_polygon.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_DETAIL
namespace detail { namespace sym_difference
{
template <typename GeometryOut>
struct compute_difference
{
template
<
typename Geometry1,
typename Geometry2,
typename RobustPolicy,
typename OutputIterator,
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,
GeometryOut,
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 GeometryOut, typename Geometry1, typename Geometry2>
struct sym_difference_generic
{
template
<
typename RobustPolicy,
typename OutputIterator,
typename Strategy
>
static inline OutputIterator apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
OutputIterator out,
Strategy const& strategy)
{
out = compute_difference
<
GeometryOut
>::apply(geometry1, geometry2, robust_policy, out, strategy);
return compute_difference
<
GeometryOut
>::apply(geometry2, geometry1, robust_policy, out, strategy);
}
};
template <typename GeometryOut, typename Areal1, typename Areal2>
struct sym_difference_areal_areal
{
template
<
typename RobustPolicy,
typename OutputIterator,
typename Strategy
>
static inline OutputIterator apply(Areal1 const& areal1,
Areal2 const& areal2,
RobustPolicy const& robust_policy,
OutputIterator out,
Strategy const& strategy)
{
typedef geometry::model::multi_polygon
<
GeometryOut
> helper_geometry_type;
helper_geometry_type diff12, diff21;
std::back_insert_iterator<helper_geometry_type> oit12(diff12);
std::back_insert_iterator<helper_geometry_type> oit21(diff21);
compute_difference
<
GeometryOut
>::apply(areal1, areal2, robust_policy, oit12, strategy);
compute_difference
<
GeometryOut
>::apply(areal2, areal1, robust_policy, oit21, strategy);
return geometry::dispatch::union_insert
<
helper_geometry_type,
helper_geometry_type,
GeometryOut
>::apply(diff12, diff21, robust_policy, out, strategy);
}
};
}} // namespace detail::sym_difference
#endif // DOXYGEN_NO_DETAIL
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
template
<
typename Geometry1,
typename Geometry2,
typename GeometryOut,
typename TagIn1 = typename geometry::tag_cast
<
typename tag<Geometry1>::type, areal_tag
>::type,
typename TagIn2 = typename geometry::tag_cast
<
typename tag<Geometry2>::type, areal_tag
>::type,
typename TagOut = typename geometry::tag<GeometryOut>::type
>
struct sym_difference_insert
: detail::sym_difference::sym_difference_generic
<
GeometryOut, Geometry1, Geometry2
>
{};
template
<
typename Areal1,
typename Areal2,
typename GeometryOut,
typename TagOut
>
struct sym_difference_insert
<
Areal1, Areal2, GeometryOut,
areal_tag, areal_tag, TagOut
> : detail::sym_difference::sym_difference_areal_areal
<
GeometryOut, Areal1, Areal2
>
{};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace sym_difference
{
/*!
\brief \brief_calc2{symmetric difference} \brief_strategy
\ingroup sym_difference
\details \details_calc2{symmetric difference, spatial set theoretic symmetric difference (XOR)}
\brief_strategy. \details_insert{sym_difference}
\tparam GeometryOut output geometry type, must be specified
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\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 RobustPolicy,
typename OutputIterator,
typename Strategy
>
inline OutputIterator sym_difference_insert(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
OutputIterator out,
Strategy const& strategy)
{
concepts::check<Geometry1 const>();
concepts::check<Geometry2 const>();
concepts::check<GeometryOut>();
return dispatch::sym_difference_insert
<
Geometry1, Geometry2, GeometryOut
>::apply(geometry1, geometry2, robust_policy, out, strategy);
}
/*!
\brief \brief_calc2{symmetric difference}
\ingroup sym_difference
\details \details_calc2{symmetric difference, spatial set theoretic symmetric difference (XOR)}
\details_insert{sym_difference}
\tparam GeometryOut output geometry type, must be specified
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param out \param_out{difference}
\return \return_out
*/
template
<
typename GeometryOut,
typename Geometry1,
typename Geometry2,
typename RobustPolicy,
typename OutputIterator
>
inline OutputIterator sym_difference_insert(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy, OutputIterator out)
{
concepts::check<Geometry1 const>();
concepts::check<Geometry2 const>();
concepts::check<GeometryOut>();
typedef typename strategy::intersection::services::default_strategy
<
typename cs_tag<GeometryOut>::type
>::type strategy_type;
return sym_difference_insert<GeometryOut>(geometry1, geometry2, robust_policy, out, strategy_type());
}
}} // namespace detail::sym_difference
#endif // DOXYGEN_NO_DETAIL
namespace resolve_strategy {
struct sym_difference
{
template
<
typename Geometry1,
typename Geometry2,
typename RobustPolicy,
typename Collection,
typename Strategy
>
static inline void apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
Collection & output_collection,
Strategy const& strategy)
{
typedef typename boost::range_value<Collection>::type geometry_out;
detail::sym_difference::sym_difference_insert<geometry_out>(
geometry1, geometry2, robust_policy,
range::back_inserter(output_collection),
strategy);
}
template
<
typename Geometry1,
typename Geometry2,
typename RobustPolicy,
typename Collection
>
static inline void apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
RobustPolicy const& robust_policy,
Collection & output_collection,
default_strategy)
{
typedef typename boost::range_value<Collection>::type geometry_out;
detail::sym_difference::sym_difference_insert<geometry_out>(
geometry1, geometry2, robust_policy,
range::back_inserter(output_collection));
}
};
} // resolve_strategy
namespace resolve_variant
{
template <typename Geometry1, typename Geometry2>
struct sym_difference
{
template <typename Collection, typename Strategy>
static inline void apply(Geometry1 const& geometry1,
Geometry2 const& geometry2,
Collection& output_collection,
Strategy const& strategy)
{
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);
resolve_strategy::sym_difference::apply(geometry1, geometry2,
robust_policy,
output_collection,
strategy);
}
};
template <BOOST_VARIANT_ENUM_PARAMS(typename T), typename Geometry2>
struct sym_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
{
sym_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 sym_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
{
sym_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 sym_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
{
sym_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 \brief_calc2{symmetric difference}
\ingroup sym_difference
\details \details_calc2{symmetric difference, spatial set theoretic symmetric difference (XOR)}.
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\tparam Collection output collection, either a multi-geometry,
or a std::vector<Geometry> / std::deque<Geometry> etc
\tparam Strategy \tparam_strategy{Sym_difference}
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param output_collection the output collection
\param strategy \param_strategy{sym_difference}
\qbk{distinguish,with strategy}
\qbk{[include reference/algorithms/sym_difference.qbk]}
*/
template
<
typename Geometry1,
typename Geometry2,
typename Collection,
typename Strategy
>
inline void sym_difference(Geometry1 const& geometry1,
Geometry2 const& geometry2,
Collection& output_collection,
Strategy const& strategy)
{
resolve_variant::sym_difference
<
Geometry1,
Geometry2
>::apply(geometry1, geometry2, output_collection, strategy);
}
/*!
\brief \brief_calc2{symmetric difference}
\ingroup sym_difference
\details \details_calc2{symmetric difference, spatial set theoretic symmetric difference (XOR)}.
\tparam Geometry1 \tparam_geometry
\tparam Geometry2 \tparam_geometry
\tparam Collection output collection, either a multi-geometry,
or a std::vector<Geometry> / std::deque<Geometry> etc
\param geometry1 \param_geometry
\param geometry2 \param_geometry
\param output_collection the output collection
\qbk{[include reference/algorithms/sym_difference.qbk]}
*/
template
<
typename Geometry1,
typename Geometry2,
typename Collection
>
inline void sym_difference(Geometry1 const& geometry1,
Geometry2 const& geometry2,
Collection& output_collection)
{
resolve_variant::sym_difference
<
Geometry1,
Geometry2
>::apply(geometry1, geometry2, output_collection, default_strategy());
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_SYM_DIFFERENCE_HPP
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