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https://issues.apache.org/jira/browse/LUCENE-8136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16337673#comment-16337673
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Karl Wright commented on LUCENE-8136:
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1e-8 is unacceptably large.
It's also the case that if you had a check whether points were "identical", I
suspect that your test cases would be found illegal because some of the test
plane points would be identical or colinear (at that level of
MINIMUM_RESOLUTION). The plane constructor obviously doesn't look at this but
the GeoPolygonFactory filters identical and coplanar points, so I suspect your
plane test is not going to be realistic unless you make sure you do the same
kind of filtering in it.
> Planes constructed with two points are wrong when points are close
> ------------------------------------------------------------------
>
> Key: LUCENE-8136
> URL: https://issues.apache.org/jira/browse/LUCENE-8136
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/spatial3d
> Reporter: Ignacio Vera
> Assignee: Karl Wright
> Priority: Major
> Attachments: LUCENE-8136-RandomTest.patch
>
>
> Whenever a plane is constructed with two points (and the center of the
> planet), and those points are close to each other,it might happen that the
> final plane does not contain all points used for the construction. The issue
> seems to happen when the resulting magnitude of the normal vector of the new
> plane (calculated using cross product) is lower that 1e-5.
> This is a follow up of issue LUCENE-8133.
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