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https://issues.apache.org/jira/browse/LUCENE-7974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Rowe resolved LUCENE-7974.
--------------------------------
Resolution: Fixed
Fix Version/s: master (8.0)
7.1
{quote}
bq. I'm wondering whether the use of getMinDelta could be replaced with
Math.nextUp/Math.nextDown?
getMinDelta calculates a fudge factor from the distance exponent \[...\]
bq. OK, I see now. I (wrongly) thought it was only a way to make sure that the
float cast did not round down.
{quote}
Thanks Adrien. I committed the patch with a slightly edited version of my
explanation above added to the {{getMinDelta()}} javadocs.
> Add N-dimensional FloatPoint K-nearest-neighbor implementation
> --------------------------------------------------------------
>
> Key: LUCENE-7974
> URL: https://issues.apache.org/jira/browse/LUCENE-7974
> Project: Lucene - Core
> Issue Type: New Feature
> Components: modules/sandbox
> Reporter: Steve Rowe
> Assignee: Steve Rowe
> Priority: Minor
> Fix For: 7.1, master (8.0)
>
> Attachments: LUCENE-7974.patch
>
>
> From LUCENE-7069:
> {quote}
> KD trees (used by Lucene's new dimensional points) excel at finding "nearest
> neighbors" to a given query point ... I think we should add this to Lucene's
> sandbox
> [...]
> It could also be generalized to more than 2 dimensions, but for now I'm
> making the class package private in sandbox for just the geo2d (lat/lon) use
> case.
> {quote}
> This issue is to generalize {{LatLonPoint.nearest()}} to more than 2
> dimensions.
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