boost/geometry/algorithms/detail/disjoint/linear_linear.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 // Copyright (c) 2013-2014 Adam Wulkiewicz, Lodz, Poland.
   7
   8 // This file was modified by Oracle on 2013-2017.
   9 // Modifications copyright (c) 2013-2017, Oracle and/or its affiliates.
  10
  11 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  12 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
  13
  14 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
  15 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  16
  17 // Use, modification and distribution is subject to the Boost Software License,
  18 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  19 // http://www.boost.org/LICENSE_1_0.txt)
  20
  21 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISJOINT_LINEAR_LINEAR_HPP
  22 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISJOINT_LINEAR_LINEAR_HPP
  23
  24 #include <cstddef>
  25 #include <deque>
  26
  27 #include <boost/range.hpp>
  28 #include <boost/geometry/util/range.hpp>
  29
  30 #include <boost/geometry/core/point_type.hpp>
  31 #include <boost/geometry/core/tag.hpp>
  32 #include <boost/geometry/core/tags.hpp>
  33
  34 #include <boost/geometry/algorithms/detail/overlay/turn_info.hpp>
  35 #include <boost/geometry/algorithms/detail/overlay/get_turns.hpp>
  36 #include <boost/geometry/algorithms/detail/overlay/do_reverse.hpp>
  37 #include <boost/geometry/algorithms/detail/overlay/segment_as_subrange.hpp>
  38
  39 #include <boost/geometry/policies/disjoint_interrupt_policy.hpp>
  40 #include <boost/geometry/policies/robustness/no_rescale_policy.hpp>
  41
  42 #include <boost/geometry/algorithms/dispatch/disjoint.hpp>
  43
  44
  45 namespace boost { namespace geometry
  46 {
  47
  48
  49 #ifndef DOXYGEN_NO_DETAIL
  50 namespace detail { namespace disjoint
  51 {
  52
  53 template <typename Segment1, typename Segment2>
  54 struct disjoint_segment
  55 {
  56     template <typename Strategy>
  57     static inline bool apply(Segment1 const& segment1, Segment2 const& segment2,
  58                              Strategy const& strategy)
  59     {
  60         typedef typename point_type<Segment1>::type point_type;
  61
  62         typedef segment_intersection_points<point_type> intersection_return_type;
  63
  64         typedef policies::relate::segments_intersection_points
  65             <
  66                 intersection_return_type
  67             > intersection_policy;
  68
  69         detail::segment_as_subrange<Segment1> sub_range1(segment1);
  70         detail::segment_as_subrange<Segment2> sub_range2(segment2);
  71         intersection_return_type is = strategy.apply(sub_range1, sub_range2,
  72                                                      intersection_policy());
  73
  74         return is.count == 0;
  75     }
  76 };
  77
  78
  79 struct assign_disjoint_policy
  80 {
  81     // We want to include all points:
  82     static bool const include_no_turn = true;
  83     static bool const include_degenerate = true;
  84     static bool const include_opposite = true;
  85 };
  86
  87
  88 template <typename Geometry1, typename Geometry2>
  89 struct disjoint_linear
  90 {
  91     template <typename Strategy>
  92     static inline bool apply(Geometry1 const& geometry1,
  93                              Geometry2 const& geometry2,
  94                              Strategy const& strategy)
  95     {
  96         typedef typename geometry::point_type<Geometry1>::type point_type;
  97         typedef geometry::segment_ratio
  98             <
  99                 typename coordinate_type<point_type>::type
 100             > ratio_type;
 101         typedef overlay::turn_info
 102             <
 103                 point_type,
 104                 ratio_type,
 105                 typename detail::get_turns::turn_operation_type
 106                         <
 107                             Geometry1, Geometry2, ratio_type
 108                         >::type
 109             > turn_info_type;
 110
 111         std::deque<turn_info_type> turns;
 112
 113         // Specify two policies:
 114         // 1) Stop at any intersection
 115         // 2) In assignment, include also degenerate points (which are normally skipped)
 116         disjoint_interrupt_policy interrupt_policy;
 117         dispatch::get_turns
 118             <
 119                 typename geometry::tag<Geometry1>::type,
 120                 typename geometry::tag<Geometry2>::type,
 121                 Geometry1,
 122                 Geometry2,
 123                 overlay::do_reverse<geometry::point_order<Geometry1>::value>::value, // should be false
 124                 overlay::do_reverse<geometry::point_order<Geometry2>::value>::value, // should be false
 125                 detail::get_turns::get_turn_info_type
 126                     <
 127                         Geometry1, Geometry2, assign_disjoint_policy
 128                     >
 129             >::apply(0, geometry1, 1, geometry2,
 130                      strategy, detail::no_rescale_policy(), turns, interrupt_policy);
 131
 132         return !interrupt_policy.has_intersections;
 133     }
 134 };
 135
 136
 137 }} // namespace detail::disjoint
 138 #endif // DOXYGEN_NO_DETAIL
 139
 140
 141
 142
 143 #ifndef DOXYGEN_NO_DISPATCH
 144 namespace dispatch
 145 {
 146
 147
 148 template <typename Linear1, typename Linear2>
 149 struct disjoint<Linear1, Linear2, 2, linear_tag, linear_tag, false>
 150     : detail::disjoint::disjoint_linear<Linear1, Linear2>
 151 {};
 152
 153
 154 template <typename Segment1, typename Segment2>
 155 struct disjoint<Segment1, Segment2, 2, segment_tag, segment_tag, false>
 156     : detail::disjoint::disjoint_segment<Segment1, Segment2>
 157 {};
 158
 159
 160 } // namespace dispatch
 161 #endif // DOXYGEN_NO_DISPATCH
 162
 163
 164 }} // namespace boost::geometry
 165
 166
 167 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISJOINT_LINEAR_LINEAR_HPP