[jira] [Resolved] (NUMBERS-161) PlaneAngle Numerical Accuracy

["Gilles Sadowski (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NUMBERS-161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gilles Sadowski resolved NUMBERS-161.
-------------------------------------
    Resolution: Fixed

> PlaneAngle Numerical Accuracy
> -----------------------------
>
>                 Key: NUMBERS-161
>                 URL: https://issues.apache.org/jira/browse/NUMBERS-161
>             Project: Commons Numbers
>          Issue Type: Improvement
>            Reporter: Matt Juntunen
>            Assignee: Gilles Sadowski
>            Priority: Major
>
> The current {{PlaneAngle}} class introduces unnecessary round-off errors during use since it internally converts all values to turns. For example, it is currently impossible to represent the radians value {{Double.MIN_NORMAL}} exactly since the internal multiplication introduces errors: {{PlaneAngle.ofRadians(Double.MIN_NORMAL).toRadians()}} does not equal {{Double.MIN_NORMAL}}. We should restructure this API so that values are stored exactly and multiplication is only performed when required.
> This issue was discovered during work on GEOMETRY-124. Use of the new {{Reduce}} class added two more floating point operations to angle normalization and caused a regression in commons-geometry-spherical.



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