boost/geometry/algorithms/detail/intersects/implementation.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2008-2014 Bruno Lalande, Paris, France.
   5 // Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
   6
   7 // This file was modified by Oracle on 2013-2017.
   8 // Modifications copyright (c) 2013-2017, Oracle and/or its affiliates.
   9
  10 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
  11 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  12
  13 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
  14 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  15
  16 // Use, modification and distribution is subject to the Boost Software License,
  17 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  18 // http://www.boost.org/LICENSE_1_0.txt)
  19
  20 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_INTERSECTS_IMPLEMENTATION_HPP
  21 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_INTERSECTS_IMPLEMENTATION_HPP
  22
  23
  24 #include <deque>
  25
  26 #include <boost/geometry/algorithms/detail/intersects/interface.hpp>
  27 #include <boost/geometry/algorithms/detail/disjoint/implementation.hpp>
  28
  29 #include <boost/geometry/algorithms/detail/overlay/self_turn_points.hpp>
  30 #include <boost/geometry/policies/disjoint_interrupt_policy.hpp>
  31 #include <boost/geometry/policies/robustness/no_rescale_policy.hpp>
  32
  33 #include <boost/geometry/strategies/relate.hpp>
  34
  35
  36 namespace boost { namespace geometry
  37 {
  38
  39 #ifndef DOXYGEN_NO_DETAIL
  40 namespace detail { namespace intersects
  41 {
  42
  43 template <typename Geometry>
  44 struct self_intersects
  45 {
  46     static bool apply(Geometry const& geometry)
  47     {
  48         concepts::check<Geometry const>();
  49
  50         typedef typename geometry::point_type<Geometry>::type point_type;
  51         typedef typename strategy::relate::services::default_strategy
  52                 <
  53                     Geometry, Geometry
  54                 >::type strategy_type;
  55
  56         typedef detail::overlay::turn_info<point_type> turn_info;
  57
  58         std::deque<turn_info> turns;
  59
  60         typedef detail::overlay::get_turn_info
  61             <
  62                 detail::overlay::assign_null_policy
  63             > turn_policy;
  64
  65         strategy_type strategy;
  66
  67         detail::disjoint::disjoint_interrupt_policy policy;
  68     // TODO: skip_adjacent should be set to false
  69         detail::self_get_turn_points::get_turns
  70             <
  71                 false, turn_policy
  72             >::apply(geometry, strategy, detail::no_rescale_policy(), turns, policy, 0, true);
  73         return policy.has_intersections;
  74     }
  75 };
  76
  77 }} // namespace detail::intersects
  78 #endif // DOXYGEN_NO_DETAIL
  79
  80 }} // namespace boost::geometry
  81
  82 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_INTERSECTS_IMPLEMENTATION_HPP