summaryrefslogtreecommitdiff log msg author committer range
 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 ``` ``````// Boost.Geometry (aka GGL, Generic Geometry Library) // Copyright (c) 2014-2015, Oracle and/or its affiliates. // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle // Contributed and/or modified by Adam Wulkiewicz, 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_VALID_SEGMENT_HPP #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_SEGMENT_HPP #include #include #include #include #include #include #include #include namespace boost { namespace geometry { #ifndef DOXYGEN_NO_DISPATCH namespace dispatch { // 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 // A curve is 1-dimensional, hence we have to check is the two // endpoints of the segment coincide, since in this case it is // 0-dimensional. // // Reference: OGC 06-103r4 (6.1.6.1) template struct is_valid { template static inline bool apply(Segment const& segment, VisitPolicy& visitor) { boost::ignore_unused(visitor); typename point_type::type p[2]; detail::assign_point_from_index<0>(segment, p[0]); detail::assign_point_from_index<1>(segment, p[1]); if (detail::is_valid::has_invalid_coordinate < Segment >::apply(segment, visitor)) { return false; } else if (! geometry::equals(p[0], p[1])) { return visitor.template apply(); } else { return visitor.template apply(); } } }; } // namespace dispatch #endif // DOXYGEN_NO_DISPATCH }} // namespace boost::geometry #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_SEGMENT_HPP ``````