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https://issues.apache.org/jira/browse/LUCENE-8220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16412645#comment-16412645
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Karl Wright commented on LUCENE-8220:
-------------------------------------
The points it is winding up with imply it's decided to include the whole world:
{code}
[lat=1.1479899664334199, lon=0.425760260307307([X=0.3736898659162658,
Y=0.1694681499562862, Z=0.9119410234559455])]
[lat=1.1479899664334199, lon=0.42576359388617835([X=0.37368930097874536,
Y=0.169469395679986, Z=0.9119410234559455])]
[lat=1.1479899664334199, lon=0.4257611678785181([X=0.37368971211169777,
Y=0.16946848910638057, Z=0.9119410234559455])]
{code}
[~ivera], this is obviously incorrect. It makes me wonder if the original
polygon crosses itself? Yes, I know you have a 2D graphic for it, but given
the far northerly latitude, I doubt that the planar rendering is meaningful.
> GeoPolygon factory still shows problems with coplanar points
> ------------------------------------------------------------
>
> Key: LUCENE-8220
> URL: https://issues.apache.org/jira/browse/LUCENE-8220
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/spatial3d
> Reporter: Ignacio Vera
> Assignee: Karl Wright
> Priority: Major
> Attachments: concave.jpg, concaveWithTiling.jpg,
> coplanarity-test.patch
>
>
> The attached patch contains two polygons that still shows problems with
> co-planar points. To better explain the issue I attached some images:
> 1) concave.jpg: This is the polygon we want to build. Note that we want to
> build the concave part, therefore the blue part is actually not part of the
> shape and the white part is the area cover by the shape.
> 2) concaveWithTiling.jpg: The algorithm of the polygon factory tries to tile
> the polygon using convex polygons. In our case it creates the three colored
> polygons on the image. What it remains is a concave polygon.
> The problem with this polygon is that the right edge of the concave polygon
> contains co-planar points. These points cannot be merged into a single plane
> because they have different properties (internal edges or shape edges).
> Because GeoConvexPolygon and GeoConcavePolygon cannot handle polygons with
> co-planar points, the polygon cannot be built.
> [[email protected]], Is it possible to make this polygons support such
> an extreme case?
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