ceph/src/boost/boost/geometry/algorithms/detail/overlay/ring_properties.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
   4
   5 // This file was modified by Oracle on 2017.
   6 // Modifications copyright (c) 2017 Oracle and/or its affiliates.
   7 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
   8
   9 // Use, modification and distribution is subject to the Boost Software License,
  10 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  11 // http://www.boost.org/LICENSE_1_0.txt)
  12
  13 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_RING_PROPERTIES_HPP
  14 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_RING_PROPERTIES_HPP
  15
  16
  17 #include <boost/geometry/algorithms/area.hpp>
  18 #include <boost/geometry/algorithms/within.hpp>
  19 #include <boost/geometry/algorithms/detail/point_on_border.hpp>
  20
  21
  22 namespace boost { namespace geometry
  23 {
  24
  25
  26 #ifndef DOXYGEN_NO_DETAIL
  27 namespace detail { namespace overlay
  28 {
  29
  30 template <typename Point, typename AreaType>
  31 struct ring_properties
  32 {
  33     typedef Point point_type;
  34     typedef AreaType area_type;
  35
  36     bool valid;
  37
  38     // Filled by "select_rings"
  39     Point point;
  40     area_type area;
  41
  42     // Filled by "update_ring_selection"
  43     bool reversed;
  44
  45     // Filled/used by "assign_rings"
  46     bool discarded;
  47     ring_identifier parent;
  48     area_type parent_area;
  49     std::vector<ring_identifier> children;
  50
  51     inline ring_properties()
  52         : valid(false)
  53         , area(area_type())
  54         , reversed(false)
  55         , discarded(false)
  56         , parent_area(-1)
  57     {}
  58
  59     template <typename RingOrBox, typename Strategy>
  60     inline ring_properties(RingOrBox const& ring_or_box, Strategy const& strategy)
  61         : reversed(false)
  62         , discarded(false)
  63         , parent_area(-1)
  64     {
  65         this->area = geometry::area(ring_or_box, strategy);
  66         valid = geometry::point_on_border(this->point, ring_or_box);
  67     }
  68
  69     inline area_type get_area() const
  70     {
  71         return reversed ? -area : area;
  72     }
  73 };
  74
  75 }} // namespace detail::overlay
  76 #endif // DOXYGEN_NO_DETAIL
  77
  78
  79 }} // namespace boost::geometry
  80
  81
  82 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_RING_PROPERTIES_HPP