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https://issues.apache.org/jira/browse/MATH-863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13460487#comment-13460487
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Sébastien Brisard commented on MATH-863:
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If you like {{leftMultiply}}, feel free to add it, so long as {{a.multiply(b)}}
reads from left to right... How about we call {{leftMultiply}}
{{weirdMultiply}} ;)
In fact, thinking about it, there might be a gain in implementing
{{leftMultiply}}: if we were to create a {{Real}} class which would be a
subclass of {{Quaternion}}, Real.leftMultiply(Quaternion) would be much faster
than Quaternion.rightMultiply(Real).
> new Quaternion class added in complex package
> ---------------------------------------------
>
> Key: MATH-863
> URL: https://issues.apache.org/jira/browse/MATH-863
> Project: Commons Math
> Issue Type: New Feature
> Affects Versions: 3.1
> Reporter: Julien Anxionnat
> Attachments: quaternion_adjustments.patch, quaternion.patch,
> quaternion_v2.patch
>
> Original Estimate: 0h
> Remaining Estimate: 0h
>
> This patch provides a new class for the mathematical object "Quaternion" in
> the complex package.
> This quaternion is considered as a mathematical object (the Hamilton's
> hypercomplex number).
> Note that it's not a rotation quaternion which has to be a quaternion of norm
> one. Although this feature could be used for a getter in the Rotation class.
> This patch provides also some improvements in Precision class : a "double
> comparison epsilon" and a method to compute relative comparison.
> (Please, note that's it's my first contribution, and I apologize in advance
> for my mistakes…)
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