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Retry with boost::geometry::intersection if fast_clip fails #597

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Dec 1, 2023
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15 changes: 14 additions & 1 deletion src/output_object.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -171,7 +171,20 @@ Geometry buildWayGeometry(OSMStore &osmStore, OutputObject const &oo, const Tile
geom::assign(mp, input);
fast_clip(mp, box);
geom::correct(mp);
if (!geom::is_valid(mp)) make_valid(mp);
geom::validity_failure_type failure = geom::validity_failure_type::no_failure;
if (!geom::is_valid(mp,failure)) {
if (failure==geom::failure_spikes) {
geom::remove_spikes(mp);
} else if (failure==geom::failure_self_intersections || failure==geom::failure_intersecting_interiors) {
// retry with Boost intersection if fast_clip has caused self-intersections
MultiPolygon output;
geom::intersection(input, box, output);
geom::correct(output);
return output;
} else {
// occasionally also wrong_topological_dimension, disconnected_interior
}
}
return mp;
}

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