[jira] [Resolved] (LUCENE-10470) Unable to Tessellate polygon

["Ignacio Vera (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-10470?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ignacio Vera resolved LUCENE-10470.
-----------------------------------
    Fix Version/s: 9.2
         Assignee: Ignacio Vera
       Resolution: Fixed

> Unable to Tessellate polygon
> ----------------------------
>
>                 Key: LUCENE-10470
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10470
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/index
>    Affects Versions: 9.0
>            Reporter: Yixun Xu
>            Assignee: Ignacio Vera
>            Priority: Major
>             Fix For: 9.2
>
>         Attachments: image-2022-03-16-18-12-43-411.png, image-2022-03-31-16-06-33-051.png, image-2022-04-04-17-33-52-454.png, image-2022-04-04-17-34-41-971.png, polygon2.geojson, polygon3.geojson, vertices-latest-lucene.txt, vertices-lucene-820.txt
>
>          Time Spent: 2h 20m
>  Remaining Estimate: 0h
>
> I have a polygon that causes {{Tessellator.tessellate}} to throw an "Unable to Tessellate shape" error. I tried several versions of Lucene, and the issue does not happen with Lucene 8.2.0, but seems to happen with all Lucene versions >=8.3.0, including the latest main branch.
> I created a branch that reproduces the issue: [https://github.com/apache/lucene/compare/main...yixunx:yx/reproduce-tessellator-error?expand=1]
> This is the polygon rendered on geojson.io:
> !image-2022-03-16-18-12-43-411.png|width=379,height=234!
> Is this a bug in the Tesselator logic, or is there anything wrong with this polygon that maybe wasn't caught by Lucene 8.2.0?



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