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https://issues.apache.org/jira/browse/LUCENE-10470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17528637#comment-17528637
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ASF subversion and git services commented on LUCENE-10470:
----------------------------------------------------------
Commit 5d3ab09676a90bb143be711d568782cbec06fb4d in lucene's branch
refs/heads/main from Ignacio Vera
[ https://gitbox.apache.org/repos/asf?p=lucene.git;h=5d3ab09676a ]
LUCENE-10470: [Tessellator] Fix some failing polygons due to collinear edges
(#756)
Check if polygon has been successfully tessellated before we fail (we are
failing some valid
tessellations) and allow filtering edges that fold on top of the previous one
> 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
> Priority: Major
> 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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