diff options
Diffstat (limited to 'boost/geometry/algorithms/detail/overlay/convert_ring.hpp')
| -rw-r--r-- | boost/geometry/algorithms/detail/overlay/convert_ring.hpp | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/boost/geometry/algorithms/detail/overlay/convert_ring.hpp b/boost/geometry/algorithms/detail/overlay/convert_ring.hpp index 05bd721e7f..51955b515d 100644 --- a/boost/geometry/algorithms/detail/overlay/convert_ring.hpp +++ b/boost/geometry/algorithms/detail/overlay/convert_ring.hpp @@ -77,12 +77,23 @@ struct convert_ring<polygon_tag> } else { - interior_rings(destination).resize( - interior_rings(destination).size() + 1); - geometry::convert(source, interior_rings(destination).back()); - if (reverse) + // Avoid adding interior rings which are invalid + // because of its number of points: + std::size_t const min_num_points + = core_detail::closure::minimum_ring_size + < + geometry::closure<Destination>::value + >::value; + + if (geometry::num_points(source) >= min_num_points) { - boost::reverse(interior_rings(destination).back()); + interior_rings(destination).resize( + interior_rings(destination).size() + 1); + geometry::convert(source, interior_rings(destination).back()); + if (reverse) + { + boost::reverse(interior_rings(destination).back()); + } } } } |