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https://issues.apache.org/jira/browse/NUMBERS-80?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16717480#comment-16717480
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Gilles commented on NUMBERS-80:
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Hi Matt and Steve.
Please have a look at commit d216fe76769afcd8d271ba39038251bb5b9a4659.
> Quaternion Updates for commons-geometry
> ---------------------------------------
>
> Key: NUMBERS-80
> URL: https://issues.apache.org/jira/browse/NUMBERS-80
> Project: Commons Numbers
> Issue Type: Task
> Reporter: Matt Juntunen
> Priority: Blocker
>
> The {{Quaternion}} class should be updated in order to allow the
> {{QuaternionRotation}} class from commons-geometry to extend it. The
> following updates are required:
> - Remove {{final}} class modifier.
> - Make constructor protected.
> In addition, it would be good to switch the names of the components from
> {{q0, q1, q2, q3}} to {{w, x, y, z}}. The former assumes that the convention
> that the scalar component is always listed first, which is not the case in
> some domains. The latter convention is not ambiguous.
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