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[algorithms] Add support for GC in union.
This commit is contained in:
@@ -2,8 +2,8 @@
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// Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
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// This file was modified by Oracle on 2014-2021.
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// Modifications copyright (c) 2014-2021 Oracle and/or its affiliates.
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// This file was modified by Oracle on 2014-2022.
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// Modifications copyright (c) 2014-2022 Oracle and/or its affiliates.
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// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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@@ -18,7 +18,9 @@
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#include <boost/range/value_type.hpp>
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#include <boost/geometry/algorithms/detail/intersection/gc.hpp>
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#include <boost/geometry/algorithms/detail/intersection/multi.hpp>
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#include <boost/geometry/algorithms/detail/make_rtree.hpp>
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#include <boost/geometry/algorithms/detail/overlay/intersection_insert.hpp>
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#include <boost/geometry/algorithms/detail/overlay/linear_linear.hpp>
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#include <boost/geometry/algorithms/detail/overlay/overlay.hpp>
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@@ -26,6 +28,7 @@
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#include <boost/geometry/algorithms/not_implemented.hpp>
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#include <boost/geometry/core/point_order.hpp>
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#include <boost/geometry/core/reverse_dispatch.hpp>
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#include <boost/geometry/geometries/adapted/boost_variant.hpp>
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#include <boost/geometry/geometries/concepts/check.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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@@ -34,7 +37,9 @@
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#include <boost/geometry/strategies/relate/geographic.hpp>
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#include <boost/geometry/strategies/relate/spherical.hpp>
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#include <boost/geometry/util/range.hpp>
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#include <boost/geometry/util/type_traits_std.hpp>
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#include <boost/geometry/views/detail/geometry_collection_view.hpp>
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#include <boost/geometry/views/detail/random_access_view.hpp>
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namespace boost { namespace geometry
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@@ -375,28 +380,133 @@ inline OutputIterator union_insert(Geometry1 const& geometry1,
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}
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struct gc_element_id
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{
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gc_element_id(unsigned int source_id_, std::size_t gc_id_)
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: source_id(source_id_), gc_id(gc_id_)
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{}
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unsigned int source_id;
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std::size_t gc_id;
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friend bool operator<(gc_element_id const& left, gc_element_id const& right)
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{
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return left.source_id < right.source_id
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|| (left.source_id == right.source_id && left.gc_id < right.gc_id);
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}
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};
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template <typename GC1View, typename GC2View, typename Strategy, typename IntersectingFun, typename DisjointFun>
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inline void gc_group_elements(GC1View const& gc1_view, GC2View const& gc2_view, Strategy const& strategy,
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IntersectingFun&& intersecting_fun,
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DisjointFun&& disjoint_fun)
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{
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// NOTE: could be replaced with unordered_map and unordered_set
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std::map<gc_element_id, std::set<gc_element_id>> adjacent;
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auto const rtree2 = detail::make_rtree_indexes(gc2_view, strategy);
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// Create adjacency list based on intersecting envelopes of GC elements
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for (std::size_t i = 0; i < boost::size(gc1_view); ++i)
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{
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traits::iter_visit<GC1View>::apply([&](auto const& g1)
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{
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using g1_t = util::remove_cref_t<decltype(g1)>;
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using box1_t = detail::make_rtree_box_t<g1_t>;
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box1_t b1 = geometry::return_envelope<box1_t>(g1, strategy);
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detail::expand_by_epsilon(b1);
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gc_element_id id1 = {0, i};
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for (auto qit = rtree2.qbegin(index::intersects(b1)); qit != rtree2.qend(); ++qit)
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{
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gc_element_id id2 = {1, qit->second};
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adjacent[id1].insert(id2);
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adjacent[id2].insert(id1);
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}
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}, boost::begin(gc1_view) + i);
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}
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// Traverse the graph and build connected groups i.e. groups of intersecting envelopes
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std::deque<gc_element_id> queue;
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std::array<std::vector<bool>, 2> visited = {
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std::vector<bool>(boost::size(gc1_view), false),
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std::vector<bool>(boost::size(gc2_view), false)
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};
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for (auto const& elem : adjacent)
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{
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std::vector<gc_element_id> group;
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if (! visited[elem.first.source_id][elem.first.gc_id])
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{
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queue.push_back(elem.first);
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visited[elem.first.source_id][elem.first.gc_id] = true;
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group.push_back(elem.first);
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while (! queue.empty())
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{
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gc_element_id e = queue.front();
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queue.pop_front();
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for (auto const& n : adjacent[e])
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{
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if (! visited[n.source_id][n.gc_id])
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{
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queue.push_back(n);
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visited[n.source_id][n.gc_id] = true;
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group.push_back(n);
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}
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}
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}
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}
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if (! group.empty())
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{
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intersecting_fun(group);
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}
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}
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{
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std::vector<gc_element_id> group;
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for (std::size_t i = 0; i < visited[0].size(); ++i)
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{
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if (! visited[0][i])
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{
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group.emplace_back(0, i);
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}
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}
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for (std::size_t i = 0; i < visited[1].size(); ++i)
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{
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if (! visited[1][i])
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{
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group.emplace_back(1, i);
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}
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}
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if (! group.empty())
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{
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disjoint_fun(group);
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}
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}
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}
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}} // namespace detail::union_
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#endif // DOXYGEN_NO_DETAIL
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namespace resolve_strategy {
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namespace resolve_collection
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{
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template
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<
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typename Strategy,
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bool IsUmbrella = strategies::detail::is_umbrella_strategy<Strategy>::value
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typename Geometry1, typename Geometry2, typename GeometryOut,
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typename Tag1 = typename geometry::tag<Geometry1>::type,
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typename Tag2 = typename geometry::tag<Geometry2>::type,
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typename TagOut = typename geometry::tag<GeometryOut>::type
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>
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struct union_
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{
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template <typename Geometry1, typename Geometry2, typename Collection>
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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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template <typename Strategy>
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static void apply(Geometry1 const& geometry1, Geometry2 const& geometry2,
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GeometryOut & geometry_out, Strategy const& strategy)
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{
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typedef typename geometry::detail::output_geometry_value
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<
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Collection
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GeometryOut
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>::type single_out;
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typedef typename geometry::rescale_overlay_policy_type
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@@ -414,11 +524,300 @@ struct union_
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<
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Geometry1, Geometry2, single_out
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>::apply(geometry1, geometry2, robust_policy,
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geometry::detail::output_geometry_back_inserter(output_collection),
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geometry::detail::output_geometry_back_inserter(geometry_out),
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strategy);
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}
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};
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template
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<
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typename Geometry1, typename Geometry2, typename GeometryOut
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>
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struct union_
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<
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Geometry1, Geometry2, GeometryOut,
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geometry_collection_tag, geometry_collection_tag, geometry_collection_tag
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>
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{
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// NOTE: for now require all of the possible output types
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// technically only a subset could be needed.
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using multi_point_t = typename util::sequence_find_if
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<
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typename traits::geometry_types<GeometryOut>::type,
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util::is_multi_point
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>::type;
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using multi_linestring_t = typename util::sequence_find_if
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<
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typename traits::geometry_types<GeometryOut>::type,
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util::is_multi_linestring
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>::type;
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using multi_polygon_t = typename util::sequence_find_if
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<
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typename traits::geometry_types<GeometryOut>::type,
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util::is_multi_polygon
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>::type;
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using tuple_out_t = boost::tuple<multi_point_t, multi_linestring_t, multi_polygon_t>;
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template <typename Strategy>
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static inline void apply(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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GeometryOut& geometry_out,
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Strategy const& strategy)
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{
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detail::random_access_view<Geometry1 const> gc1_view(geometry1);
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detail::random_access_view<Geometry2 const> gc2_view(geometry2);
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detail::union_::gc_group_elements(gc1_view, gc2_view, strategy,
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[&](auto const& inters_group)
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{
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tuple_out_t out;
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merge_group(gc1_view, gc2_view, strategy, inters_group, out);
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detail::intersection::gc_move_multi_back(geometry_out, boost::get<0>(out));
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detail::intersection::gc_move_multi_back(geometry_out, boost::get<1>(out));
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detail::intersection::gc_move_multi_back(geometry_out, boost::get<2>(out));
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},
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[&](auto const& disjoint_group)
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{
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copy_disjoint(gc1_view, gc2_view, disjoint_group, geometry_out);
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});
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}
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private:
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template <typename GC1View, typename GC2View, typename Strategy, typename Group>
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static inline void merge_group(GC1View const& gc1_view, GC2View const& gc2_view,
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Strategy const& strategy, Group const& inters_group,
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tuple_out_t& out)
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{
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for (auto const& id : inters_group)
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{
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if (id.source_id == 0)
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{
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traits::iter_visit<GC1View>::apply([&](auto const& g1)
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{
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merge_one(out, g1, strategy);
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}, boost::begin(gc1_view) + id.gc_id);
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}
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else
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{
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traits::iter_visit<GC2View>::apply([&](auto const& g2)
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{
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merge_one(out, g2, strategy);
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}, boost::begin(gc2_view) + id.gc_id);
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}
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}
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// L = L \ A
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{
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multi_linestring_t l;
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subtract_greater_topodim(boost::get<1>(out), boost::get<2>(out), l, strategy);
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boost::get<1>(out) = std::move(l);
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}
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// P = P \ A
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{
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multi_point_t p;
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subtract_greater_topodim(boost::get<0>(out), boost::get<2>(out), p, strategy);
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boost::get<0>(out) = std::move(p);
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}
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// P = P \ L
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{
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multi_point_t p;
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subtract_greater_topodim(boost::get<0>(out), boost::get<1>(out), p, strategy);
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boost::get<0>(out) = std::move(p);
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}
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}
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template <typename G, typename Strategy, std::enable_if_t<util::is_pointlike<G>::value, int> = 0>
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static inline void merge_one(tuple_out_t& out, G const& g, Strategy const& strategy)
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{
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multi_point_t p;
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union_<multi_point_t, G, multi_point_t>::apply(boost::get<0>(out), g, p, strategy);
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boost::get<0>(out) = std::move(p);
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}
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template <typename G, typename Strategy, std::enable_if_t<util::is_linear<G>::value, int> = 0>
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static inline void merge_one(tuple_out_t& out, G const& g, Strategy const& strategy)
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{
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multi_linestring_t l;
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union_<multi_linestring_t, G, multi_linestring_t>::apply(boost::get<1>(out), g, l, strategy);
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boost::get<1>(out) = std::move(l);
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}
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template <typename G, typename Strategy, std::enable_if_t<util::is_areal<G>::value, int> = 0>
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static inline void merge_one(tuple_out_t& out, G const& g, Strategy const& strategy)
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{
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multi_polygon_t a;
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union_<multi_polygon_t, G, multi_polygon_t>::apply(boost::get<2>(out), g, a, strategy);
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boost::get<2>(out) = std::move(a);
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}
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template <typename GC1View, typename GC2View, typename Group>
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static inline void copy_disjoint(GC1View const& gc1_view, GC2View const& gc2_view,
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Group const& disjoint_group, GeometryOut& geometry_out)
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{
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for (auto const& id : disjoint_group)
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{
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if (id.source_id == 0)
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{
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traits::iter_visit<GC1View>::apply([&](auto const& g1)
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{
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copy_one(g1, geometry_out);
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}, boost::begin(gc1_view) + id.gc_id);
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}
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else
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{
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traits::iter_visit<GC2View>::apply([&](auto const& g2)
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{
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copy_one(g2, geometry_out);
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}, boost::begin(gc2_view) + id.gc_id);
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}
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}
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}
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template <typename G, std::enable_if_t<util::is_pointlike<G>::value, int> = 0>
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static inline void copy_one(G const& g, GeometryOut& geometry_out)
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{
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multi_point_t p;
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geometry::convert(g, p);
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detail::intersection::gc_move_multi_back(geometry_out, p);
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}
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template <typename G, std::enable_if_t<util::is_linear<G>::value, int> = 0>
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static inline void copy_one(G const& g, GeometryOut& geometry_out)
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{
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multi_linestring_t l;
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geometry::convert(g, l);
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detail::intersection::gc_move_multi_back(geometry_out, l);
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}
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template <typename G, std::enable_if_t<util::is_areal<G>::value, int> = 0>
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static inline void copy_one(G const& g, GeometryOut& geometry_out)
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{
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multi_polygon_t a;
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geometry::convert(g, a);
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detail::intersection::gc_move_multi_back(geometry_out, a);
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}
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template <typename Multi1, typename Multi2, typename Strategy>
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static inline void subtract_greater_topodim(Multi1 const& multi1, Multi2 const& multi2, Multi1& multi_out, Strategy const& strategy)
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{
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using rescale_policy_type = typename geometry::rescale_overlay_policy_type
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<
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Multi1, Multi2
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>::type;
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rescale_policy_type robust_policy
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= geometry::get_rescale_policy<rescale_policy_type>(
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multi1, multi2, strategy);
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geometry::dispatch::intersection_insert
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<
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Multi1, Multi2,
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typename boost::range_value<Multi1>::type,
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overlay_difference,
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geometry::detail::overlay::do_reverse<geometry::point_order<Multi1>::value>::value,
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geometry::detail::overlay::do_reverse<geometry::point_order<Multi2>::value, true>::value
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>::apply(multi1, multi2, robust_policy, range::back_inserter(multi_out), strategy);
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}
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};
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template
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<
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typename Geometry1, typename Geometry2, typename GeometryOut, typename Tag1
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>
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struct union_
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<
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Geometry1, Geometry2, GeometryOut,
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Tag1, geometry_collection_tag, geometry_collection_tag
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>
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{
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template <typename Strategy>
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static inline void apply(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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GeometryOut& geometry_out,
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Strategy const& strategy)
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{
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using gc_view_t = geometry::detail::geometry_collection_view<Geometry1>;
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union_
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<
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gc_view_t, Geometry2, GeometryOut
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>::apply(gc_view_t(geometry1), geometry2, geometry_out, strategy);
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}
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};
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template
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<
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typename Geometry1, typename Geometry2, typename GeometryOut, typename Tag2
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>
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struct union_
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<
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Geometry1, Geometry2, GeometryOut,
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geometry_collection_tag, Tag2, geometry_collection_tag
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>
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{
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template <typename Strategy>
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static inline void apply(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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GeometryOut& geometry_out,
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Strategy const& strategy)
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{
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using gc_view_t = geometry::detail::geometry_collection_view<Geometry2>;
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union_
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<
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Geometry1, gc_view_t, GeometryOut
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>::apply(geometry1, gc_view_t(geometry2), geometry_out, strategy);
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}
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};
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template
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<
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typename Geometry1, typename Geometry2, typename GeometryOut, typename Tag1, typename Tag2
|
||||
>
|
||||
struct union_
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<
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Geometry1, Geometry2, GeometryOut,
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Tag1, Tag2, geometry_collection_tag
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||||
>
|
||||
{
|
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template <typename Strategy>
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static inline void apply(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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GeometryOut& geometry_out,
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Strategy const& strategy)
|
||||
{
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using gc1_view_t = geometry::detail::geometry_collection_view<Geometry1>;
|
||||
using gc2_view_t = geometry::detail::geometry_collection_view<Geometry2>;
|
||||
union_
|
||||
<
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||||
gc1_view_t, gc2_view_t, GeometryOut
|
||||
>::apply(gc1_view_t(geometry1), gc2_view_t(geometry2), geometry_out, strategy);
|
||||
}
|
||||
};
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||||
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||||
} // namespace resolve_collection
|
||||
|
||||
|
||||
namespace resolve_strategy {
|
||||
|
||||
template
|
||||
<
|
||||
typename Strategy,
|
||||
bool IsUmbrella = strategies::detail::is_umbrella_strategy<Strategy>::value
|
||||
>
|
||||
struct union_
|
||||
{
|
||||
template <typename Geometry1, typename Geometry2, typename Collection>
|
||||
static inline void apply(Geometry1 const& geometry1,
|
||||
Geometry2 const& geometry2,
|
||||
Collection & output_collection,
|
||||
Strategy const& strategy)
|
||||
{
|
||||
resolve_collection::union_
|
||||
<
|
||||
Geometry1, Geometry2, Collection
|
||||
>::apply(geometry1, geometry2, output_collection, strategy);
|
||||
}
|
||||
};
|
||||
|
||||
template <typename Strategy>
|
||||
struct union_<Strategy, false>
|
||||
{
|
||||
@@ -463,10 +862,15 @@ struct union_<default_strategy, false>
|
||||
} // resolve_strategy
|
||||
|
||||
|
||||
namespace resolve_variant
|
||||
namespace resolve_dynamic
|
||||
{
|
||||
|
||||
template <typename Geometry1, typename Geometry2>
|
||||
template
|
||||
<
|
||||
typename Geometry1, typename Geometry2,
|
||||
typename Tag1 = typename geometry::tag<Geometry1>::type,
|
||||
typename Tag2 = typename geometry::tag<Geometry2>::type
|
||||
>
|
||||
struct union_
|
||||
{
|
||||
template <typename Collection, typename Strategy>
|
||||
@@ -494,134 +898,64 @@ struct union_
|
||||
};
|
||||
|
||||
|
||||
template <BOOST_VARIANT_ENUM_PARAMS(typename T), typename Geometry2>
|
||||
struct union_<variant<BOOST_VARIANT_ENUM_PARAMS(T)>, Geometry2>
|
||||
template <typename DynamicGeometry1, typename Geometry2, typename Tag2>
|
||||
struct union_<DynamicGeometry1, Geometry2, dynamic_geometry_tag, Tag2>
|
||||
{
|
||||
template <typename Collection, typename Strategy>
|
||||
struct visitor: static_visitor<>
|
||||
static inline void apply(DynamicGeometry1 const& geometry1, Geometry2 const& geometry2,
|
||||
Collection& output_collection, Strategy const& strategy)
|
||||
{
|
||||
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
|
||||
traits::visit<DynamicGeometry1>::apply([&](auto const& g1)
|
||||
{
|
||||
union_
|
||||
<
|
||||
Geometry1,
|
||||
util::remove_cref_t<decltype(g1)>,
|
||||
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);
|
||||
>::apply(g1, geometry2, output_collection, strategy);
|
||||
}, geometry1);
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
template <typename Geometry1, BOOST_VARIANT_ENUM_PARAMS(typename T)>
|
||||
struct union_<Geometry1, variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
|
||||
template <typename Geometry1, typename DynamicGeometry2, typename Tag1>
|
||||
struct union_<Geometry1, DynamicGeometry2, Tag1, dynamic_geometry_tag>
|
||||
{
|
||||
template <typename Collection, typename Strategy>
|
||||
struct visitor: static_visitor<>
|
||||
static inline void apply(Geometry1 const& geometry1, DynamicGeometry2 const& geometry2,
|
||||
Collection& output_collection, Strategy const& strategy)
|
||||
{
|
||||
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
|
||||
traits::visit<DynamicGeometry2>::apply([&](auto const& g2)
|
||||
{
|
||||
union_
|
||||
<
|
||||
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);
|
||||
util::remove_cref_t<decltype(g2)>
|
||||
>::apply(geometry1, g2, output_collection, strategy);
|
||||
}, geometry2);
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
template <BOOST_VARIANT_ENUM_PARAMS(typename T1), BOOST_VARIANT_ENUM_PARAMS(typename T2)>
|
||||
struct union_<variant<BOOST_VARIANT_ENUM_PARAMS(T1)>, variant<BOOST_VARIANT_ENUM_PARAMS(T2)> >
|
||||
template <typename DynamicGeometry1, typename DynamicGeometry2>
|
||||
struct union_<DynamicGeometry1, DynamicGeometry2, dynamic_geometry_tag, dynamic_geometry_tag>
|
||||
{
|
||||
template <typename Collection, typename Strategy>
|
||||
struct visitor: static_visitor<>
|
||||
static inline void apply(DynamicGeometry1 const& geometry1, DynamicGeometry2 const& geometry2,
|
||||
Collection& output_collection, Strategy const& strategy)
|
||||
{
|
||||
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
|
||||
traits::visit<DynamicGeometry1, DynamicGeometry2>::apply([&](auto const& g1, auto const& g2)
|
||||
{
|
||||
union_
|
||||
<
|
||||
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);
|
||||
util::remove_cref_t<decltype(g1)>,
|
||||
util::remove_cref_t<decltype(g2)>
|
||||
>::apply(g1, g2, output_collection, strategy);
|
||||
}, geometry1, geometry2);
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
} // namespace resolve_variant
|
||||
} // namespace resolve_dynamic
|
||||
|
||||
|
||||
/*!
|
||||
@@ -654,7 +988,7 @@ inline void union_(Geometry1 const& geometry1,
|
||||
Collection& output_collection,
|
||||
Strategy const& strategy)
|
||||
{
|
||||
resolve_variant::union_
|
||||
resolve_dynamic::union_
|
||||
<
|
||||
Geometry1,
|
||||
Geometry2
|
||||
@@ -687,7 +1021,7 @@ inline void union_(Geometry1 const& geometry1,
|
||||
Geometry2 const& geometry2,
|
||||
Collection& output_collection)
|
||||
{
|
||||
resolve_variant::union_
|
||||
resolve_dynamic::union_
|
||||
<
|
||||
Geometry1,
|
||||
Geometry2
|
||||
|
||||
Reference in New Issue
Block a user