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Posted to dev@lucene.apache.org by "Karl Wright (JIRA)" <ji...@apache.org> on 2017/08/28 16:39:00 UTC
[jira] [Resolved] (LUCENE-7943) Plane.findArcDistancePoints()
sometimes throws assertion failures even when plane explicitly normalized
[ https://issues.apache.org/jira/browse/LUCENE-7943?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Karl Wright resolved LUCENE-7943.
---------------------------------
Resolution: Fixed
Fix Version/s: 7.1
master (8.0)
6.7
> Plane.findArcDistancePoints() sometimes throws assertion failures even when plane explicitly normalized
> -------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-7943
> URL: https://issues.apache.org/jira/browse/LUCENE-7943
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Karl Wright
> Assignee: Karl Wright
> Fix For: 6.7, master (8.0), 7.1
>
>
> The following assertion sometimes fails even when the plane has been explicitly normalized:
> {code}
> assert Math.abs(x*x + y*y + z*z - 1.0) < MINIMUM_RESOLUTION_SQUARED : "Plane needs to be normalized";
> {code}
> I can find nothing wrong with the assertion check, but the numerical accuracy is 1e-16, which just isn't high enough to support MINIMUM_RESOLUTION_SQUARED accuracy (1e-24).
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