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Posted to issues@commons.apache.org by "Luc Maisonobe (JIRA)" <ji...@apache.org> on 2013/03/06 10:02:12 UTC

[jira] [Resolved] (MATH-938) Line.revert() is imprecise

     [ https://issues.apache.org/jira/browse/MATH-938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luc Maisonobe resolved MATH-938.
--------------------------------

       Resolution: Fixed
    Fix Version/s: 3.2

Fixed in subversion repository as of r1453218.

Line should be immutable, and in fact we want to make all of the Hyperplane/SubHyperplane/Embedding/BSPTree instances immutable, but this is a large incompatible change. So it will occur only at a major release (hopefully 4.0).

Thanks for reporting the issue.
                
> Line.revert() is imprecise
> --------------------------
>
>                 Key: MATH-938
>                 URL: https://issues.apache.org/jira/browse/MATH-938
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.2
>            Reporter: Evan Ward
>             Fix For: 3.2
>
>   Original Estimate: 0.5h
>  Remaining Estimate: 0.5h
>
> Line.revert() only maintains ~10 digits for the direction. This becomes an issue when the line's position is evaluated far from the origin. A simple fix would be to use Vector3D.negate() for the direction.
> Also, is there a reason why Line is not immutable? It is just comprised of two vectors.

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