libs/geometry/test/algorithms/set_operations/check_turn_less.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2015, Oracle and/or its affiliates.
   4
   5 // Licensed under the Boost Software License version 1.0.
   6 // http://www.boost.org/users/license.html
   7
   8 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
   9
  10 #ifndef BOOST_GEOMETRY_TEST_CHECK_TURN_LESS_HPP
  11 #define BOOST_GEOMETRY_TEST_CHECK_TURN_LESS_HPP
  12
  13 #include <boost/range.hpp>
  14
  15 #include "test_set_ops_linear_linear.hpp"
  16
  17
  18 // check less functor for turns
  19 template <typename Turns, typename Less>
  20 inline void verify_less_for_turns(Turns turns, Less const& less)
  21 {
  22     typedef typename boost::range_iterator<Turns const>::type iterator_type;
  23
  24     if (boost::size(turns) < 2)
  25     {
  26         return;
  27     }
  28
  29     iterator_type last = --boost::end(turns);
  30     for (iterator_type it1 = boost::begin(turns); it1 != last; ++it1)
  31     {
  32         iterator_type it2 = it1;
  33         ++it2;
  34         for (; it2 != boost::end(turns); ++it2)
  35         {
  36             if (less(*it1, *it2))
  37             {
  38                 BOOST_CHECK(! less(*it2, *it1));
  39             }
  40             if (less(*it2, *it1))
  41             {
  42                 BOOST_CHECK(! less(*it1, *it2));
  43             }
  44         }
  45     }
  46 }
  47
  48
  49 struct check_turn_less
  50 {
  51     template <bool EnableDegenerateTurns = true>
  52     struct assign_policy
  53     {
  54         static bool const include_no_turn = false;
  55         static bool const include_degenerate = EnableDegenerateTurns;
  56         static bool const include_opposite = false;
  57
  58         template
  59         <
  60             typename Info,
  61             typename Point1,
  62             typename Point2,
  63             typename IntersectionInfo
  64         >
  65         static inline void apply(Info& , Point1 const& , Point2 const& ,
  66                                  IntersectionInfo const& )
  67         {
  68         }
  69     };
  70
  71     template <typename Geometry1, typename Geometry2>
  72     static inline void apply(Geometry1 const& geometry1,
  73                              Geometry2 const& geometry2)
  74     {
  75         typedef typename bg::strategy::intersection::services::default_strategy
  76             <
  77                 typename bg::cs_tag<Geometry1>::type
  78             >::type strategy_type;
  79
  80         typedef bg::detail::no_rescale_policy robust_policy_type;
  81
  82         typedef bg::detail::relate::turns::get_turns
  83             <
  84                 Geometry1,
  85                 Geometry2,
  86                 bg::detail::get_turns::get_turn_info_type
  87                     <
  88                         Geometry1, Geometry2, assign_policy<>
  89                     >,
  90                 robust_policy_type
  91             > get_turns_type;
  92
  93         typedef typename get_turns_type::turn_info turn_info;
  94
  95         typedef std::vector<turn_info> turns_container;
  96
  97         turns_container turns;
  98
  99         bg::detail::get_turns::no_interrupt_policy interrupt_policy;
 100
 101         get_turns_type::apply(turns, geometry1, geometry2,
 102                               interrupt_policy,
 103                               strategy_type(), robust_policy_type());
 104
 105
 106         typedef bg::detail::turns::less_seg_fraction_other_op<> turn_less_type;
 107
 108         verify_less_for_turns(turns, turn_less_type());
 109     }
 110 };
 111
 112 #endif // BOOST_GEOMETRY_TEST_CHECK_TURN_LESS_HPP