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https://issues.apache.org/jira/browse/GEOMETRY-21?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16629680#comment-16629680
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Matt Juntunen commented on GEOMETRY-21:
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This is really interesting. So, the tests pass just by changing the threshold
for the angle calculation method? This method is from the original commons-math
code so I'm not sure why the threshold was set to what it was.
> Investigate Norm Accuracy
> -------------------------
>
> Key: GEOMETRY-21
> URL: https://issues.apache.org/jira/browse/GEOMETRY-21
> Project: Apache Commons Geometry
> Issue Type: Task
> Reporter: Matt Juntunen
> Priority: Minor
>
> Based on discussion in GEOMETRY-17, we should investigate the floating point
> accuracy of the current Vector normalization methods. Specifically, when the
> UnitVector private subclass in Vector3D is implemented to return exactly 1.0,
> the SphericalPolygonsSetTest#testGeographicalMap unit test in
> commons-geometry-enclosing begins to fail. We should
> # Determine the cause of this failure.
> # Determine if the current approach with the UnitVector subclasses
> introduces any issues with floating point accuracy.
> # Add unit tests for Vector[123]D to quantify and verify the accuracy of the
> normalization.
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