Ignacio Vera created LUCENE-8157:
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Summary: GeoPolygon factory fails in recognize convex polygon
Key: LUCENE-8157
URL: https://issues.apache.org/jira/browse/LUCENE-8157
Project: Lucene - Core
Issue Type: Bug
Components: modules/spatial3d
Reporter: Ignacio Vera
When a polygon contains three consecutive points which are nearly co-planar,
the polygon factory may fail to recognize the concavity/convexity of the
polygon. I think the problem is the way the sideness for a polygon edge is
calculated. It relies in the position of the next point in respect of the
previous polygon edge which fails on the case explained above because of
numerical imprecision. The result is that sideness is messed up.
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