| // Boost.Geometry (aka GGL, Generic Geometry Library) |
| |
| // Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands. |
| |
| // This file was modified by Oracle on 2014. |
| // Modifications copyright (c) 2014 Oracle and/or its affiliates. |
| |
| // Contributed and/or modified by Menelaos Karavelas, 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_UNION_HPP |
| #define BOOST_GEOMETRY_ALGORITHMS_UNION_HPP |
| |
| |
| #include <boost/range/metafunctions.hpp> |
| |
| #include <boost/geometry/core/is_areal.hpp> |
| #include <boost/geometry/core/point_order.hpp> |
| #include <boost/geometry/core/reverse_dispatch.hpp> |
| #include <boost/geometry/geometries/concepts/check.hpp> |
| #include <boost/geometry/algorithms/not_implemented.hpp> |
| #include <boost/geometry/algorithms/detail/overlay/overlay.hpp> |
| #include <boost/geometry/policies/robustness/get_rescale_policy.hpp> |
| |
| #include <boost/geometry/algorithms/detail/overlay/linear_linear.hpp> |
| #include <boost/geometry/algorithms/detail/overlay/pointlike_pointlike.hpp> |
| |
| |
| namespace boost { namespace geometry |
| { |
| |
| #ifndef DOXYGEN_NO_DISPATCH |
| namespace dispatch |
| { |
| |
| template |
| < |
| typename Geometry1, typename Geometry2, typename GeometryOut, |
| typename TagIn1 = typename tag<Geometry1>::type, |
| typename TagIn2 = typename tag<Geometry2>::type, |
| typename TagOut = typename tag<GeometryOut>::type, |
| bool Areal1 = geometry::is_areal<Geometry1>::value, |
| bool Areal2 = geometry::is_areal<Geometry2>::value, |
| bool ArealOut = geometry::is_areal<GeometryOut>::value, |
| bool Reverse1 = detail::overlay::do_reverse<geometry::point_order<Geometry1>::value>::value, |
| bool Reverse2 = detail::overlay::do_reverse<geometry::point_order<Geometry2>::value>::value, |
| bool ReverseOut = detail::overlay::do_reverse<geometry::point_order<GeometryOut>::value>::value, |
| bool Reverse = geometry::reverse_dispatch<Geometry1, Geometry2>::type::value |
| > |
| struct union_insert: not_implemented<TagIn1, TagIn2, TagOut> |
| {}; |
| |
| |
| // If reversal is needed, perform it first |
| |
| template |
| < |
| typename Geometry1, typename Geometry2, typename GeometryOut, |
| typename TagIn1, typename TagIn2, typename TagOut, |
| bool Areal1, bool Areal2, bool ArealOut, |
| bool Reverse1, bool Reverse2, bool ReverseOut |
| > |
| struct union_insert |
| < |
| Geometry1, Geometry2, GeometryOut, |
| TagIn1, TagIn2, TagOut, |
| Areal1, Areal2, ArealOut, |
| Reverse1, Reverse2, ReverseOut, |
| true |
| >: union_insert<Geometry2, Geometry1, GeometryOut> |
| { |
| template <typename RobustPolicy, typename OutputIterator, typename Strategy> |
| static inline OutputIterator apply(Geometry1 const& g1, |
| Geometry2 const& g2, |
| RobustPolicy const& robust_policy, |
| OutputIterator out, |
| Strategy const& strategy) |
| { |
| return union_insert |
| < |
| Geometry2, Geometry1, GeometryOut |
| >::apply(g2, g1, robust_policy, out, strategy); |
| } |
| }; |
| |
| |
| template |
| < |
| typename Geometry1, typename Geometry2, typename GeometryOut, |
| typename TagIn1, typename TagIn2, typename TagOut, |
| bool Reverse1, bool Reverse2, bool ReverseOut |
| > |
| struct union_insert |
| < |
| Geometry1, Geometry2, GeometryOut, |
| TagIn1, TagIn2, TagOut, |
| true, true, true, |
| Reverse1, Reverse2, ReverseOut, |
| false |
| > : detail::overlay::overlay |
| <Geometry1, Geometry2, Reverse1, Reverse2, ReverseOut, GeometryOut, overlay_union> |
| {}; |
| |
| |
| // dispatch for union of non-areal geometries |
| template |
| < |
| typename Geometry1, typename Geometry2, typename GeometryOut, |
| typename TagIn1, typename TagIn2, typename TagOut, |
| bool Reverse1, bool Reverse2, bool ReverseOut |
| > |
| struct union_insert |
| < |
| Geometry1, Geometry2, GeometryOut, |
| TagIn1, TagIn2, TagOut, |
| false, false, false, |
| Reverse1, Reverse2, ReverseOut, |
| false |
| > : union_insert |
| < |
| Geometry1, Geometry2, GeometryOut, |
| typename tag_cast<TagIn1, pointlike_tag, linear_tag>::type, |
| typename tag_cast<TagIn2, pointlike_tag, linear_tag>::type, |
| TagOut, |
| false, false, false, |
| Reverse1, Reverse2, ReverseOut, |
| false |
| > |
| {}; |
| |
| |
| // dispatch for union of linear geometries |
| template |
| < |
| typename Linear1, typename Linear2, typename LineStringOut, |
| bool Reverse1, bool Reverse2, bool ReverseOut |
| > |
| struct union_insert |
| < |
| Linear1, Linear2, LineStringOut, |
| linear_tag, linear_tag, linestring_tag, |
| false, false, false, |
| Reverse1, Reverse2, ReverseOut, |
| false |
| > : detail::overlay::linear_linear_linestring |
| < |
| Linear1, Linear2, LineStringOut, overlay_union |
| > |
| {}; |
| |
| |
| // dispatch for point-like geometries |
| template |
| < |
| typename PointLike1, typename PointLike2, typename PointOut, |
| bool Reverse1, bool Reverse2, bool ReverseOut |
| > |
| struct union_insert |
| < |
| PointLike1, PointLike2, PointOut, |
| pointlike_tag, pointlike_tag, point_tag, |
| false, false, false, |
| Reverse1, Reverse2, ReverseOut, |
| false |
| > : detail::overlay::union_pointlike_pointlike_point |
| < |
| PointLike1, PointLike2, PointOut |
| > |
| {}; |
| |
| |
| } // namespace dispatch |
| #endif // DOXYGEN_NO_DISPATCH |
| |
| #ifndef DOXYGEN_NO_DETAIL |
| namespace detail { namespace union_ |
| { |
| |
| /*! |
| \brief_calc2{union} |
| \ingroup union |
| \details \details_calc2{union_insert, spatial set theoretic union}. |
| \details_insert{union} |
| \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{union} |
| \return \return_out |
| */ |
| template |
| < |
| typename GeometryOut, |
| typename Geometry1, |
| typename Geometry2, |
| typename OutputIterator |
| > |
| inline OutputIterator union_insert(Geometry1 const& geometry1, |
| Geometry2 const& geometry2, |
| OutputIterator out) |
| { |
| concept::check<Geometry1 const>(); |
| concept::check<Geometry2 const>(); |
| concept::check<GeometryOut>(); |
| |
| typedef typename geometry::rescale_overlay_policy_type |
| < |
| Geometry1, |
| Geometry2 |
| >::type rescale_policy_type; |
| |
| typedef strategy_intersection |
| < |
| typename cs_tag<GeometryOut>::type, |
| Geometry1, |
| Geometry2, |
| typename geometry::point_type<GeometryOut>::type, |
| rescale_policy_type |
| > strategy; |
| |
| rescale_policy_type robust_policy |
| = geometry::get_rescale_policy<rescale_policy_type>(geometry1, geometry2); |
| |
| return dispatch::union_insert |
| < |
| Geometry1, Geometry2, GeometryOut |
| >::apply(geometry1, geometry2, robust_policy, out, strategy()); |
| } |
| |
| |
| }} // namespace detail::union_ |
| #endif // DOXYGEN_NO_DETAIL |
| |
| |
| |
| |
| /*! |
| \brief Combines two geometries which each other |
| \ingroup union |
| \details \details_calc2{union, spatial set theoretic union}. |
| \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 |
| \note Called union_ because union is a reserved word. |
| |
| \qbk{[include reference/algorithms/union.qbk]} |
| */ |
| template |
| < |
| typename Geometry1, |
| typename Geometry2, |
| typename Collection |
| > |
| inline void union_(Geometry1 const& geometry1, |
| Geometry2 const& geometry2, |
| Collection& output_collection) |
| { |
| concept::check<Geometry1 const>(); |
| concept::check<Geometry2 const>(); |
| |
| typedef typename boost::range_value<Collection>::type geometry_out; |
| concept::check<geometry_out>(); |
| |
| detail::union_::union_insert<geometry_out>(geometry1, geometry2, |
| std::back_inserter(output_collection)); |
| } |
| |
| |
| }} // namespace boost::geometry |
| |
| |
| #endif // BOOST_GEOMETRY_ALGORITHMS_UNION_HPP |