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https://issues.apache.org/jira/browse/LUCENE-7941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16143375#comment-16143375
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Ignacio Vera commented on LUCENE-7941:
--------------------------------------
Thanks for this new function [~daddywri]. My comments:
It seems there is a problem with it. In line 2500 of Plane class I think the
condition should read like:
if (!point1Valid) {
return false;
}
If not the function is equivalent to intersects().
I try to implement get relationship() with this new information. First thing I
notice is that I need to run intersects() and crosses() in the same function
all the time which seems to be running very similar code. I guess it would be
better to have a function similar to getRelationship() for planes that return
three possibilities: DISJOINT/INTERSECTS/CROSSES.
But It seems that if we go that way we would need to change more things. There
is one case, when the intersection point is equal to the edge point that fails.
It means that we would need at least two edge points per shape.
Now I am convinced that the current implementation is the most efficient under
contract. I am not so keen in change it.
Thanks!
> GeoDegeneratePoints return intersects when located in edge shape
> -----------------------------------------------------------------
>
> Key: LUCENE-7941
> URL: https://issues.apache.org/jira/browse/LUCENE-7941
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Ignacio Vera
> Assignee: Karl Wright
> Priority: Minor
> Fix For: 6.7, master (8.0), 7.1
>
> Attachments: LUCENE-7941-test.patch
>
>
> If the degenerate Geopoint lays on the boundary of a shape, the
> relationships between the objects are not symetrical:
> The bounding box "thinks" it contains the degenerated point.
> The degenerated point "thinks" it intersects the shape.
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