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588 lines
18 KiB
C++
588 lines
18 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
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// Copyright (c) 2013-2015 Adam Wulkiewicz, Lodz, Poland.
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// This file was modified by Oracle on 2013, 2014, 2015.
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// Modifications copyright (c) 2013-2015, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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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_TOUCHES_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_TOUCHES_HPP
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#include <deque>
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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/geometries/concepts/check.hpp>
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#include <boost/geometry/algorithms/detail/for_each_range.hpp>
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#include <boost/geometry/algorithms/detail/overlay/overlay.hpp>
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#include <boost/geometry/algorithms/detail/overlay/self_turn_points.hpp>
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#include <boost/geometry/algorithms/disjoint.hpp>
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#include <boost/geometry/algorithms/intersects.hpp>
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#include <boost/geometry/algorithms/num_geometries.hpp>
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#include <boost/geometry/algorithms/detail/sub_range.hpp>
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#include <boost/geometry/policies/robustness/no_rescale_policy.hpp>
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#include <boost/geometry/algorithms/relate.hpp>
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#include <boost/geometry/algorithms/detail/relate/relate_impl.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 touches
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{
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// Box/Box
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template
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<
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std::size_t Dimension,
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std::size_t DimensionCount
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>
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struct box_box_loop
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{
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template <typename Box1, typename Box2>
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static inline bool apply(Box1 const& b1, Box2 const& b2, bool & touch)
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{
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typedef typename coordinate_type<Box1>::type coordinate_type1;
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typedef typename coordinate_type<Box2>::type coordinate_type2;
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coordinate_type1 const& min1 = get<min_corner, Dimension>(b1);
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coordinate_type1 const& max1 = get<max_corner, Dimension>(b1);
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coordinate_type2 const& min2 = get<min_corner, Dimension>(b2);
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coordinate_type2 const& max2 = get<max_corner, Dimension>(b2);
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// TODO assert or exception?
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//BOOST_GEOMETRY_ASSERT(min1 <= max1 && min2 <= max2);
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if (max1 < min2 || max2 < min1)
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{
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return false;
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}
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if (max1 == min2 || max2 == min1)
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{
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touch = true;
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}
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return box_box_loop
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<
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Dimension + 1,
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DimensionCount
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>::apply(b1, b2, touch);
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}
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};
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template
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<
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std::size_t DimensionCount
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>
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struct box_box_loop<DimensionCount, DimensionCount>
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{
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template <typename Box1, typename Box2>
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static inline bool apply(Box1 const& , Box2 const&, bool &)
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{
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return true;
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}
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};
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struct box_box
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{
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template <typename Box1, typename Box2>
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static inline bool apply(Box1 const& b1, Box2 const& b2)
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{
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BOOST_STATIC_ASSERT((boost::is_same
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<
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typename geometry::coordinate_system<Box1>::type,
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typename geometry::coordinate_system<Box2>::type
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>::value
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));
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assert_dimension_equal<Box1, Box2>();
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bool touches = false;
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bool ok = box_box_loop
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<
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0,
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dimension<Box1>::type::value
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>::apply(b1, b2, touches);
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return ok && touches;
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}
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};
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// Areal/Areal
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struct areal_interrupt_policy
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{
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static bool const enabled = true;
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bool found_touch;
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bool found_not_touch;
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// dummy variable required by self_get_turn_points::get_turns
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static bool const has_intersections = false;
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inline bool result()
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{
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return found_touch && !found_not_touch;
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}
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inline areal_interrupt_policy()
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: found_touch(false), found_not_touch(false)
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{}
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template <typename Range>
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inline bool apply(Range const& range)
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{
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// if already rejected (temp workaround?)
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if ( found_not_touch )
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return true;
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typedef typename boost::range_iterator<Range const>::type iterator;
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for ( iterator it = boost::begin(range) ; it != boost::end(range) ; ++it )
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{
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if ( it->has(overlay::operation_intersection) )
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{
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found_not_touch = true;
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return true;
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}
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switch(it->method)
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{
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case overlay::method_crosses:
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found_not_touch = true;
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return true;
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case overlay::method_equal:
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// Segment spatially equal means: at the right side
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// the polygon internally overlaps. So return false.
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found_not_touch = true;
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return true;
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case overlay::method_touch:
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case overlay::method_touch_interior:
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case overlay::method_collinear:
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if ( ok_for_touch(*it) )
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{
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found_touch = true;
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}
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else
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{
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found_not_touch = true;
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return true;
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}
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break;
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case overlay::method_none :
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case overlay::method_disjoint :
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case overlay::method_error :
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break;
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}
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}
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return false;
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}
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template <typename Turn>
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inline bool ok_for_touch(Turn const& turn)
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{
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return turn.both(overlay::operation_union)
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|| turn.both(overlay::operation_blocked)
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|| turn.combination(overlay::operation_union, overlay::operation_blocked)
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;
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}
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};
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template<typename Geometry>
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struct check_each_ring_for_within
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{
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bool has_within;
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Geometry const& m_geometry;
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inline check_each_ring_for_within(Geometry const& g)
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: has_within(false)
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, m_geometry(g)
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{}
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template <typename Range>
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inline void apply(Range const& range)
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{
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typename geometry::point_type<Range>::type p;
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geometry::point_on_border(p, range);
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if ( !has_within && geometry::within(p, m_geometry) )
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{
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has_within = true;
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}
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}
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};
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template <typename FirstGeometry, typename SecondGeometry>
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inline bool rings_containing(FirstGeometry const& geometry1,
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SecondGeometry const& geometry2)
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{
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check_each_ring_for_within<FirstGeometry> checker(geometry1);
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geometry::detail::for_each_range(geometry2, checker);
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return checker.has_within;
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}
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template <typename Geometry1, typename Geometry2>
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struct areal_areal
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{
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static inline
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bool apply(Geometry1 const& geometry1, Geometry2 const& geometry2)
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{
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typedef detail::no_rescale_policy rescale_policy_type;
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typedef typename geometry::point_type<Geometry1>::type point_type;
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typedef detail::overlay::turn_info
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<
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point_type,
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typename segment_ratio_type<point_type, rescale_policy_type>::type
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> turn_info;
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std::deque<turn_info> turns;
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detail::touches::areal_interrupt_policy policy;
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rescale_policy_type robust_policy;
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boost::geometry::get_turns
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<
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detail::overlay::do_reverse<geometry::point_order<Geometry1>::value>::value,
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detail::overlay::do_reverse<geometry::point_order<Geometry2>::value>::value,
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detail::overlay::assign_null_policy
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>(geometry1, geometry2, robust_policy, turns, policy);
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return policy.result()
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&& ! geometry::detail::touches::rings_containing(geometry1, geometry2)
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&& ! geometry::detail::touches::rings_containing(geometry2, geometry1);
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}
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};
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// P/*
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struct use_point_in_geometry
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{
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template <typename Point, typename Geometry>
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static inline bool apply(Point const& point, Geometry const& geometry)
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{
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return detail::within::point_in_geometry(point, geometry) == 0;
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}
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};
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}}
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#endif // DOXYGEN_NO_DETAIL
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#ifndef DOXYGEN_NO_DISPATCH
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namespace dispatch {
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// TODO: Since CastedTags are used is Reverse needed?
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template
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<
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typename Geometry1, typename Geometry2,
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typename Tag1 = typename tag<Geometry1>::type,
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typename Tag2 = typename tag<Geometry2>::type,
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typename CastedTag1 = typename tag_cast<Tag1, pointlike_tag, linear_tag, areal_tag>::type,
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typename CastedTag2 = typename tag_cast<Tag2, pointlike_tag, linear_tag, areal_tag>::type,
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bool Reverse = reverse_dispatch<Geometry1, Geometry2>::type::value
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>
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struct touches
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: not_implemented<Tag1, Tag2>
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{};
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// If reversal is needed, perform it
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template
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<
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typename Geometry1, typename Geometry2,
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typename Tag1, typename Tag2,
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typename CastedTag1, typename CastedTag2
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>
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struct touches<Geometry1, Geometry2, Tag1, Tag2, CastedTag1, CastedTag2, true>
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: touches<Geometry2, Geometry1, Tag2, Tag1, CastedTag2, CastedTag1, false>
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{
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static inline bool apply(Geometry1 const& g1, Geometry2 const& g2)
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{
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return touches<Geometry2, Geometry1>::apply(g2, g1);
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}
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};
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// P/P
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template <typename Geometry1, typename Geometry2, typename Tag1, typename Tag2>
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struct touches<Geometry1, Geometry2, Tag1, Tag2, pointlike_tag, pointlike_tag, false>
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{
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static inline bool apply(Geometry1 const& , Geometry2 const& )
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{
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return false;
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}
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};
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// P/*
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template <typename Point, typename Geometry, typename Tag2, typename CastedTag2>
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struct touches<Point, Geometry, point_tag, Tag2, pointlike_tag, CastedTag2, false>
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: detail::touches::use_point_in_geometry
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{};
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// TODO: support touches(MPt, Linear/Areal)
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// Box/Box
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template <typename Box1, typename Box2, typename CastedTag1, typename CastedTag2>
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struct touches<Box1, Box2, box_tag, box_tag, CastedTag1, CastedTag2, false>
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: detail::touches::box_box
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{};
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template <typename Box1, typename Box2>
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struct touches<Box1, Box2, box_tag, box_tag, areal_tag, areal_tag, false>
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: detail::touches::box_box
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{};
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// L/L
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template <typename Linear1, typename Linear2, typename Tag1, typename Tag2>
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struct touches<Linear1, Linear2, Tag1, Tag2, linear_tag, linear_tag, false>
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: detail::relate::relate_impl
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<
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detail::de9im::static_mask_touches_type,
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Linear1,
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Linear2
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>
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{};
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// L/A
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template <typename Linear, typename Areal, typename Tag1, typename Tag2>
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struct touches<Linear, Areal, Tag1, Tag2, linear_tag, areal_tag, false>
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: detail::relate::relate_impl
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<
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detail::de9im::static_mask_touches_type,
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Linear,
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Areal
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>
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{};
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// A/L
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template <typename Linear, typename Areal, typename Tag1, typename Tag2>
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struct touches<Areal, Linear, Tag1, Tag2, areal_tag, linear_tag, false>
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: detail::relate::relate_impl
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<
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detail::de9im::static_mask_touches_type,
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Areal,
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Linear
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>
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{};
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// A/A
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template <typename Areal1, typename Areal2, typename Tag1, typename Tag2>
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struct touches<Areal1, Areal2, Tag1, Tag2, areal_tag, areal_tag, false>
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: detail::relate::relate_impl
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<
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detail::de9im::static_mask_touches_type,
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Areal1,
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Areal2
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>
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{};
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template <typename Areal1, typename Areal2>
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struct touches<Areal1, Areal2, ring_tag, ring_tag, areal_tag, areal_tag, false>
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: detail::touches::areal_areal<Areal1, Areal2>
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{};
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} // namespace dispatch
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#endif // DOXYGEN_NO_DISPATCH
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namespace resolve_variant {
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template <typename Geometry1, typename Geometry2>
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struct touches
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{
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static bool apply(Geometry1 const& geometry1, Geometry2 const& geometry2)
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{
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concepts::check<Geometry1 const>();
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concepts::check<Geometry2 const>();
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return dispatch::touches<Geometry1, Geometry2>
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::apply(geometry1, geometry2);
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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 touches<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>, Geometry2>
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{
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struct visitor: boost::static_visitor<bool>
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{
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Geometry2 const& m_geometry2;
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visitor(Geometry2 const& geometry2): m_geometry2(geometry2) {}
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template <typename Geometry1>
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bool operator()(Geometry1 const& geometry1) const
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{
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return touches<Geometry1, Geometry2>::apply(geometry1, m_geometry2);
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}
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};
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static inline bool
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apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry1,
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Geometry2 const& geometry2)
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{
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return boost::apply_visitor(visitor(geometry2), 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 touches<Geometry1, boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
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{
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struct visitor: boost::static_visitor<bool>
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{
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Geometry1 const& m_geometry1;
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visitor(Geometry1 const& geometry1): m_geometry1(geometry1) {}
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template <typename Geometry2>
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bool operator()(Geometry2 const& geometry2) const
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{
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return touches<Geometry1, Geometry2>::apply(m_geometry1, geometry2);
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}
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};
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static inline bool
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apply(Geometry1 const& geometry1,
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boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry2)
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{
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return boost::apply_visitor(visitor(geometry1), geometry2);
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}
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};
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template <BOOST_VARIANT_ENUM_PARAMS(typename T1),
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BOOST_VARIANT_ENUM_PARAMS(typename T2)>
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struct touches<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T1)>,
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boost::variant<BOOST_VARIANT_ENUM_PARAMS(T2)> >
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{
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struct visitor: boost::static_visitor<bool>
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{
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template <typename Geometry1, typename Geometry2>
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bool operator()(Geometry1 const& geometry1,
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Geometry2 const& geometry2) const
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{
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return touches<Geometry1, Geometry2>::apply(geometry1, geometry2);
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}
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};
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static inline bool
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apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T1)> const& geometry1,
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boost::variant<BOOST_VARIANT_ENUM_PARAMS(T2)> const& geometry2)
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{
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return boost::apply_visitor(visitor(), geometry1, geometry2);
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}
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};
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template <typename Geometry>
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struct self_touches
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{
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static bool apply(Geometry const& geometry)
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{
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concepts::check<Geometry const>();
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typedef detail::no_rescale_policy rescale_policy_type;
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typedef typename geometry::point_type<Geometry>::type point_type;
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typedef detail::overlay::turn_info
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<
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point_type,
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typename segment_ratio_type<point_type, rescale_policy_type>::type
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> turn_info;
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typedef detail::overlay::get_turn_info
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<
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detail::overlay::assign_null_policy
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> policy_type;
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std::deque<turn_info> turns;
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detail::touches::areal_interrupt_policy policy;
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rescale_policy_type robust_policy;
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detail::self_get_turn_points::get_turns
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<
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policy_type
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>::apply(geometry, robust_policy, turns, policy);
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return policy.result();
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}
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};
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template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
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struct self_touches<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
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{
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struct visitor: boost::static_visitor<bool>
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{
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template <typename Geometry>
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bool operator()(Geometry const& geometry) const
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{
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return self_touches<Geometry>::apply(geometry);
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}
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};
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static inline bool
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apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry)
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{
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return boost::apply_visitor(visitor(), geometry);
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}
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};
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} // namespace resolve_variant
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/*!
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\brief \brief_check{has at least one touching point (self-tangency)}
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\note This function can be called for one geometry (self-tangency) and
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also for two geometries (touch)
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\ingroup touches
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\tparam Geometry \tparam_geometry
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\param geometry \param_geometry
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\return \return_check{is self-touching}
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\qbk{distinguish,one geometry}
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\qbk{[def __one_parameter__]}
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\qbk{[include reference/algorithms/touches.qbk]}
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*/
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template <typename Geometry>
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inline bool touches(Geometry const& geometry)
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{
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return resolve_variant::self_touches<Geometry>::apply(geometry);
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}
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/*!
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\brief \brief_check2{have at least one touching point (tangent - non overlapping)}
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\ingroup touches
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\tparam Geometry1 \tparam_geometry
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\tparam Geometry2 \tparam_geometry
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\param geometry1 \param_geometry
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\param geometry2 \param_geometry
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\return \return_check2{touch each other}
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\qbk{distinguish,two geometries}
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\qbk{[include reference/algorithms/touches.qbk]}
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*/
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template <typename Geometry1, typename Geometry2>
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inline bool touches(Geometry1 const& geometry1, Geometry2 const& geometry2)
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{
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return resolve_variant::touches<Geometry1, Geometry2>::apply(geometry1, geometry2);
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_TOUCHES_HPP
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