ceph/src/boost/libs/geometry/include/boost/geometry/util/order_as_direction.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
   5 // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
   6
   7 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
   8 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
   9
  10 // Use, modification and distribution is subject to the Boost Software License,
  11 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  12 // http://www.boost.org/LICENSE_1_0.txt)
  13
  14 #ifndef BOOST_GEOMETRY_UTIL_ORDER_AS_DIRECTION_HPP
  15 #define BOOST_GEOMETRY_UTIL_ORDER_AS_DIRECTION_HPP
  16
  17 #include <boost/geometry/core/point_order.hpp>
  18 #include <boost/geometry/views/reversible_view.hpp>
  19
  20 namespace boost { namespace geometry
  21 {
  22
  23
  24 template<order_selector Order>
  25 struct order_as_direction
  26 {};
  27
  28
  29 template<>
  30 struct order_as_direction<clockwise>
  31 {
  32     static const iterate_direction value = iterate_forward;
  33 };
  34
  35
  36 template<>
  37 struct order_as_direction<counterclockwise>
  38 {
  39     static const iterate_direction value = iterate_reverse;
  40 };
  41
  42
  43 }} // namespace boost::geometry
  44
  45
  46 #endif // BOOST_GEOMETRY_UTIL_ORDER_AS_DIRECTION_HPP