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https://issues.apache.org/jira/browse/LUCENE-6759?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14717707#comment-14717707
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Karl Wright commented on LUCENE-6759:
-------------------------------------
[~mikemccand]: So, your code:
{code}
long y = (long) (x * (Integer.MAX_VALUE / max));
{code}
... can be rewritten:
{code}
long y = (long) (x / max * Integer.MAX_VALUE);
{code}
So it is basically scaling so that Integer.MAX_VALUE is returned for a value of
max. So far so good.
But in order to do that, it's rounding down for positive numbers, and rounding
up for negative ones. So:
1.5 -> 1
1.1 -> 1
1.9 -> 1
2.1 -> 2
-1.5 -> -1
-1.9 -> -1
But:
0.9 -> 0
-0.9 -> 0
So, the cell at 0 is in fact representing a range that is twice as great as the
cell at 1 or the cell at -1. I'm not sure you really want that. ;-)
> Integrate lat/long BKD and spatial 3d, part 2
> ---------------------------------------------
>
> Key: LUCENE-6759
> URL: https://issues.apache.org/jira/browse/LUCENE-6759
> Project: Lucene - Core
> Issue Type: New Feature
> Reporter: Michael McCandless
> Attachments: LUCENE-6699.patch, LUCENE-6699.patch, LUCENE-6699.patch,
> LUCENE-6699.patch, LUCENE-6699.patch, LUCENE-6699.patch, LUCENE-6699.patch
>
>
> This is just a continuation of LUCENE-6699, which became too big.
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