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https://issues.apache.org/jira/browse/LUCENE-9642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17258067#comment-17258067
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ASF subversion and git services commented on LUCENE-9642:
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Commit ce667fdd2f9453f34c8dc393600565c425021fd1 in lucene-solr's branch
refs/heads/master from Ignacio Vera
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=ce667fd ]
LUCENE-9642: Rotate triangle points before checking triangle orientation (#2154)
When encoding triangles in ShapeField, make sure generated triangles are CCW by
rotating triangle points before checking triangle orientation.
> TestXYShapeEncoding.testRandomPolygonEncoding failure
> -----------------------------------------------------
>
> Key: LUCENE-9642
> URL: https://issues.apache.org/jira/browse/LUCENE-9642
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Ignacio Vera
> Priority: Major
> Time Spent: 40m
> Remaining Estimate: 0h
>
> This test fails for the following seed:
>
> {{./gradlew test --tests TestXYShapeEncoding.testRandomPolygonEncoding
> -Dtests.seed=CB4BC47404510050 -Dtests.slow=true -Dtests.badapples=true
> -Dtests.locale=ug -Dtests.timezone=America/Matamoros -Dtests.asserts=true
> -Dtests.file.encoding=UTF-8}}
>
> When encoding.a triangle we perform two actions:
> 1) Make sure that the orientation of the triangle is CCW
> 2) Place the point with minimum X in the first position so we might rotate
> the points in the triangle.
> In this case the triangle is degenerated so when the triangle is rotated, it
> changes the orientation, tripping an assertion when decoding it. I think the
> fix for this is to change the order of the actions above.
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