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https://issues.apache.org/jira/browse/LUCENE-8220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16412735#comment-16412735
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Karl Wright commented on LUCENE-8220:
-------------------------------------
[~ivera], when I apply the patch and un-ignore the test, that test passes, but
other tests fail, e.g.:
{code}
[junit4] Suite: org.apache.lucene.spatial3d.geom.RandomGeoPolygonTest
[junit4] 2> NOTE: reproduce with: ant test
-Dtestcase=RandomGeoPolygonTest -Dtests.method=testCoplanarityTilePolygon
-Dtests.seed=A69C6E2335E509EF -Dtests.slow=true -Dtests.badapples=true
-Dtests.locale=is-IS -Dtests.tim
ezone=Pacific/Galapagos -Dtests.asserts=true -Dtests.file.encoding=Cp1252
[junit4] FAILURE 0.15s J1 | RandomGeoPolygonTest.testCoplanarityTilePolygon
<<<
[junit4] > Throwable #1: java.lang.AssertionError
[junit4] > at
__randomizedtesting.SeedInfo.seed([A69C6E2335E509EF:DF4889912003CEF6]:0)
[junit4] > at
org.apache.lucene.spatial3d.geom.RandomGeoPolygonTest.testCoplanarityTilePolygon(RandomGeoPolygonTest.java:85)
[junit4] > at java.lang.Thread.run(Thread.java:745)
[junit4] 2> NOTE: test params are: codec=Asserting(Lucene70): {},
docValues:{}, maxPointsInLeafNode=1050, maxMBSortInHeap=7.671874176950007,
sim=Asserting(org.apache.lucene.search.similarities.AssertingSimilarity@580819b1
), locale=is-IS, timezone=Pacific/Galapagos
[junit4] 2> NOTE: Windows 8.1 6.3 amd64/Oracle Corporation 1.8.0_45
(64-bit)/cpus=4,threads=1,free=119276696,total=128974848
[junit4] 2> NOTE: All tests run in this JVM: [RandomGeoPolygonTest]
{code}
> GeoPolygon factory still shows problems with coplanar points
> ------------------------------------------------------------
>
> Key: LUCENE-8220
> URL: https://issues.apache.org/jira/browse/LUCENE-8220
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/spatial3d
> Reporter: Ignacio Vera
> Assignee: Karl Wright
> Priority: Major
> Attachments: concave.jpg, concaveWithTiling.jpg,
> coplanarity-test.patch, factory.patch
>
>
> The attached patch contains two polygons that still shows problems with
> co-planar points. To better explain the issue I attached some images:
> 1) concave.jpg: This is the polygon we want to build. Note that we want to
> build the concave part, therefore the blue part is actually not part of the
> shape and the white part is the area cover by the shape.
> 2) concaveWithTiling.jpg: The algorithm of the polygon factory tries to tile
> the polygon using convex polygons. In our case it creates the three colored
> polygons on the image. What it remains is a concave polygon.
> The problem with this polygon is that the right edge of the concave polygon
> contains co-planar points. These points cannot be merged into a single plane
> because they have different properties (internal edges or shape edges).
> Because GeoConvexPolygon and GeoConcavePolygon cannot handle polygons with
> co-planar points, the polygon cannot be built.
> [[email protected]], Is it possible to make this polygons support such
> an extreme case?
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