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[Jan Stránský <question671141@xxxxxxxxxxxxxxxxxxxxx>]

Question #671141 on Yade changed:
https://answers.launchpad.net/yade/+question/671141

    Status: Open => Answered

Jan Stránský proposed the following answer:
> One question remained, if I use orientation=Quaternion((1,0,0),pi/4)
then how to calculate the rotation axis of the Rotation engine?

try (not tested)
quaternion * originalAxis
i.e.
Quaternion((1,0,0),pi/4) * Vector3(0,0,1)

cheers
Jan

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