407 lines
13 KiB
C++
407 lines
13 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// This file was modified by Oracle on 2017.
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// Modifications copyright (c) 2017, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_ALGORITHMS_DIFFERENCE_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DIFFERENCE_HPP
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#include <boost/variant/apply_visitor.hpp>
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#include <boost/variant/static_visitor.hpp>
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#include <boost/variant/variant_fwd.hpp>
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#include <boost/geometry/algorithms/detail/overlay/intersection_insert.hpp>
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#include <boost/geometry/policies/robustness/get_rescale_policy.hpp>
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#include <boost/geometry/strategies/default_strategy.hpp>
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#include <boost/geometry/util/range.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail { namespace difference
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{
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/*!
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\brief_calc2{difference} \brief_strategy
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\ingroup difference
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\details \details_calc2{difference_insert, spatial set theoretic difference}
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\brief_strategy. \details_inserter{difference}
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\tparam GeometryOut output geometry type, must be specified
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\tparam Geometry1 \tparam_geometry
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\tparam Geometry2 \tparam_geometry
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\tparam OutputIterator output iterator
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\tparam Strategy \tparam_strategy_overlay
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\param geometry1 \param_geometry
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\param geometry2 \param_geometry
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\param out \param_out{difference}
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\param strategy \param_strategy{difference}
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\return \return_out
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\qbk{distinguish,with strategy}
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*/
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template
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<
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typename GeometryOut,
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typename Geometry1,
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typename Geometry2,
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typename RobustPolicy,
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typename OutputIterator,
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typename Strategy
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>
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inline OutputIterator difference_insert(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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RobustPolicy const& robust_policy,
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OutputIterator out,
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Strategy const& strategy)
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{
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concepts::check<Geometry1 const>();
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concepts::check<Geometry2 const>();
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concepts::check<GeometryOut>();
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return geometry::dispatch::intersection_insert
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<
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Geometry1, Geometry2,
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GeometryOut,
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overlay_difference,
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geometry::detail::overlay::do_reverse<geometry::point_order<Geometry1>::value>::value,
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geometry::detail::overlay::do_reverse<geometry::point_order<Geometry2>::value, true>::value
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>::apply(geometry1, geometry2, robust_policy, out, strategy);
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}
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/*!
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\brief_calc2{difference}
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\ingroup difference
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\details \details_calc2{difference_insert, spatial set theoretic difference}.
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\details_insert{difference}
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\tparam GeometryOut output geometry type, must be specified
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\tparam Geometry1 \tparam_geometry
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\tparam Geometry2 \tparam_geometry
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\tparam OutputIterator output iterator
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\param geometry1 \param_geometry
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\param geometry2 \param_geometry
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\param out \param_out{difference}
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\return \return_out
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\qbk{[include reference/algorithms/difference_insert.qbk]}
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*/
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template
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<
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typename GeometryOut,
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typename Geometry1,
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typename Geometry2,
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typename RobustPolicy,
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typename OutputIterator
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>
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inline OutputIterator difference_insert(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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RobustPolicy const& robust_policy,
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OutputIterator out)
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{
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typedef typename strategy::relate::services::default_strategy
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<
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Geometry1,
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Geometry2
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>::type strategy_type;
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return difference_insert<GeometryOut>(geometry1, geometry2,
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robust_policy, out, strategy_type());
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}
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}} // namespace detail::difference
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#endif // DOXYGEN_NO_DETAIL
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namespace resolve_strategy {
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struct difference
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{
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template
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<
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typename Geometry1,
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typename Geometry2,
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typename RobustPolicy,
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typename Collection,
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typename Strategy
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>
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static inline void apply(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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RobustPolicy const& robust_policy,
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Collection & output_collection,
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Strategy const& strategy)
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{
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typedef typename boost::range_value<Collection>::type geometry_out;
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detail::difference::difference_insert<geometry_out>(
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geometry1, geometry2, robust_policy,
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range::back_inserter(output_collection),
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strategy);
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}
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template
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<
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typename Geometry1,
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typename Geometry2,
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typename RobustPolicy,
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typename Collection
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>
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static inline void apply(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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RobustPolicy const& robust_policy,
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Collection & output_collection,
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default_strategy)
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{
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typedef typename boost::range_value<Collection>::type geometry_out;
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detail::difference::difference_insert<geometry_out>(
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geometry1, geometry2, robust_policy,
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range::back_inserter(output_collection));
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}
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};
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} // resolve_strategy
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namespace resolve_variant
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{
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template <typename Geometry1, typename Geometry2>
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struct difference
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{
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template <typename Collection, typename Strategy>
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static inline void apply(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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Collection& output_collection,
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Strategy const& strategy)
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{
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typedef typename geometry::rescale_overlay_policy_type
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<
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Geometry1,
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Geometry2
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>::type rescale_policy_type;
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rescale_policy_type robust_policy
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= geometry::get_rescale_policy<rescale_policy_type>(geometry1,
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geometry2);
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resolve_strategy::difference::apply(geometry1, geometry2,
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robust_policy,
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output_collection,
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strategy);
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}
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};
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template <BOOST_VARIANT_ENUM_PARAMS(typename T), typename Geometry2>
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struct difference<variant<BOOST_VARIANT_ENUM_PARAMS(T)>, Geometry2>
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{
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template <typename Collection, typename Strategy>
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struct visitor: static_visitor<>
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{
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Geometry2 const& m_geometry2;
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Collection& m_output_collection;
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Strategy const& m_strategy;
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visitor(Geometry2 const& geometry2,
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Collection& output_collection,
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Strategy const& strategy)
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: m_geometry2(geometry2)
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, m_output_collection(output_collection)
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, m_strategy(strategy)
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{}
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template <typename Geometry1>
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void operator()(Geometry1 const& geometry1) const
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{
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difference
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<
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Geometry1,
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Geometry2
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>::apply(geometry1, m_geometry2, m_output_collection, m_strategy);
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}
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};
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template <typename Collection, typename Strategy>
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static inline void
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apply(variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry1,
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Geometry2 const& geometry2,
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Collection& output_collection,
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Strategy const& strategy)
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{
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boost::apply_visitor(visitor<Collection, Strategy>(geometry2,
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output_collection,
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strategy),
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geometry1);
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}
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};
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template <typename Geometry1, BOOST_VARIANT_ENUM_PARAMS(typename T)>
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struct difference<Geometry1, variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
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{
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template <typename Collection, typename Strategy>
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struct visitor: static_visitor<>
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{
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Geometry1 const& m_geometry1;
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Collection& m_output_collection;
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Strategy const& m_strategy;
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visitor(Geometry1 const& geometry1,
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Collection& output_collection,
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Strategy const& strategy)
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: m_geometry1(geometry1)
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, m_output_collection(output_collection)
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, m_strategy(strategy)
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{}
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template <typename Geometry2>
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void operator()(Geometry2 const& geometry2) const
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{
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difference
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<
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Geometry1,
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Geometry2
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>::apply(m_geometry1, geometry2, m_output_collection, m_strategy);
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}
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};
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template <typename Collection, typename Strategy>
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static inline void
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apply(Geometry1 const& geometry1,
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variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry2,
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Collection& output_collection,
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Strategy const& strategy)
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{
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boost::apply_visitor(visitor<Collection, Strategy>(geometry1,
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output_collection,
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strategy),
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geometry2);
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}
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};
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template <BOOST_VARIANT_ENUM_PARAMS(typename T1), BOOST_VARIANT_ENUM_PARAMS(typename T2)>
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struct difference<variant<BOOST_VARIANT_ENUM_PARAMS(T1)>, variant<BOOST_VARIANT_ENUM_PARAMS(T2)> >
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{
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template <typename Collection, typename Strategy>
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struct visitor: static_visitor<>
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{
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Collection& m_output_collection;
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Strategy const& m_strategy;
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visitor(Collection& output_collection, Strategy const& strategy)
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: m_output_collection(output_collection)
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, m_strategy(strategy)
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{}
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template <typename Geometry1, typename Geometry2>
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void operator()(Geometry1 const& geometry1,
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Geometry2 const& geometry2) const
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{
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difference
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<
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Geometry1,
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Geometry2
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>::apply(geometry1, geometry2, m_output_collection, m_strategy);
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}
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};
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template <typename Collection, typename Strategy>
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static inline void
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apply(variant<BOOST_VARIANT_ENUM_PARAMS(T1)> const& geometry1,
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variant<BOOST_VARIANT_ENUM_PARAMS(T2)> const& geometry2,
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Collection& output_collection,
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Strategy const& strategy)
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{
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boost::apply_visitor(visitor<Collection, Strategy>(output_collection,
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strategy),
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geometry1, geometry2);
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}
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};
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} // namespace resolve_variant
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/*!
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\brief_calc2{difference}
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\ingroup difference
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\details \details_calc2{difference, spatial set theoretic difference}.
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\tparam Geometry1 \tparam_geometry
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\tparam Geometry2 \tparam_geometry
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\tparam Collection \tparam_output_collection
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\tparam Strategy \tparam_strategy{Difference}
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\param geometry1 \param_geometry
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\param geometry2 \param_geometry
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\param output_collection the output collection
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\param strategy \param_strategy{difference}
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\qbk{distinguish,with strategy}
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\qbk{[include reference/algorithms/difference.qbk]}
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*/
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template
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<
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typename Geometry1,
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typename Geometry2,
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typename Collection,
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typename Strategy
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>
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inline void difference(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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Collection& output_collection,
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Strategy const& strategy)
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{
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resolve_variant::difference
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<
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Geometry1,
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Geometry2
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>::apply(geometry1, geometry2, output_collection, strategy);
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}
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/*!
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\brief_calc2{difference}
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\ingroup difference
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\details \details_calc2{difference, spatial set theoretic difference}.
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\tparam Geometry1 \tparam_geometry
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\tparam Geometry2 \tparam_geometry
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\tparam Collection \tparam_output_collection
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\param geometry1 \param_geometry
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\param geometry2 \param_geometry
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\param output_collection the output collection
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\qbk{[include reference/algorithms/difference.qbk]}
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*/
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template
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<
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typename Geometry1,
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typename Geometry2,
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typename Collection
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>
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inline void difference(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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Collection& output_collection)
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{
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resolve_variant::difference
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<
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Geometry1,
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Geometry2
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>::apply(geometry1, geometry2, output_collection, default_strategy());
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DIFFERENCE_HPP
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