[jira] [Commented] (LUCENE-8556) Tessellator: Polygons can fail when using Morton optimisation

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[jira] [Commented] (LUCENE-8556) Tessellator: Polygons can fail when using Morton optimisation

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    [ https://issues.apache.org/jira/browse/LUCENE-8556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16680642#comment-16680642 ]

Nicholas Knize commented on LUCENE-8556:
----------------------------------------

Patch LGTM!!  Thanks [~ivera]

> Tessellator: Polygons can fail when using Morton optimisation
> -------------------------------------------------------------
>
>                 Key: LUCENE-8556
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8556
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: modules/sandbox
>    Affects Versions: 7.6, master (8.0)
>            Reporter: Ignacio Vera
>            Priority: Blocker
>         Attachments: LUCENE-8556.patch, image-2018-11-02-08-48-12-898.png
>
>
> I experience some errors when processing complex polygons. I realised that if I disable the Morton optimisation, then the errors go away.
> I studied one of the cases and it seems that when using the optimisation, it is possible to create triangles with points inside of them (see picture attached). There is a point just on the edge of the triangle. When disabling the optimisation, such a triangle is not created.
>  



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