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Diffstat (limited to 'boost/geometry/algorithms/detail/is_simple/always_simple.hpp')
-rw-r--r-- | boost/geometry/algorithms/detail/is_simple/always_simple.hpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/boost/geometry/algorithms/detail/is_simple/always_simple.hpp b/boost/geometry/algorithms/detail/is_simple/always_simple.hpp new file mode 100644 index 0000000000..91e2ef76bd --- /dev/null +++ b/boost/geometry/algorithms/detail/is_simple/always_simple.hpp @@ -0,0 +1,83 @@ +// Boost.Geometry (aka GGL, Generic Geometry Library) + +// Copyright (c) 2014, Oracle and/or its affiliates. + +// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle + +// Licensed under the Boost Software License version 1.0. +// http://www.boost.org/users/license.html + +#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_ALWAYS_SIMPLE_HPP +#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_ALWAYS_SIMPLE_HPP + +#include <boost/geometry/core/tags.hpp> + +#include <boost/geometry/algorithms/dispatch/is_simple.hpp> + + +namespace boost { namespace geometry +{ + + +#ifndef DOXYGEN_NO_DETAIL +namespace detail { namespace is_simple +{ + + +template <typename Geometry> +struct always_simple +{ + static inline bool apply(Geometry const&) + { + return true; + } +}; + + +}} // namespace detail::is_simple +#endif // DOXYGEN_NO_DETAIL + + + + +#ifndef DOXYGEN_NO_DISPATCH +namespace dispatch +{ + + +// A point is always simple +template <typename Point> +struct is_simple<Point, point_tag> + : detail::is_simple::always_simple<Point> +{}; + + +// A valid segment is always simple. +// A segment is a curve. +// A curve is simple if it does not pass through the same point twice, +// with the possible exception of its two endpoints +// +// Reference: OGC 06-103r4 (6.1.6.1) +template <typename Segment> +struct is_simple<Segment, segment_tag> + : detail::is_simple::always_simple<Segment> +{}; + + +// A valid box is always simple +// A box is a Polygon, and it satisfies the conditions for Polygon validity. +// +// Reference (for polygon validity): OGC 06-103r4 (6.1.11.1) +template <typename Box> +struct is_simple<Box, box_tag> + : detail::is_simple::always_simple<Box> +{}; + + +} // namespace dispatch +#endif // DOXYGEN_NO_DISPATCH + + +}} // namespace boost::geometry + +#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_ALWAYS_SIMPLE_HPP |