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 47