Question #690366 on Yade changed:
https://answers.launchpad.net/yade/+question/690366
Status: Open => Answered
Jan Stránský proposed the following answer:
Hi,
> why the branch vector is not the same as the contact normal?
> contact normal is: Unit vector
you answered yourself
i.geom.normal is normalized (unit) vector from the branch vector (for the case
of sphere-sphere contact)
> i mean which one should I choose.
consistently with which one force you choose (applied on body1 or body2)
cheers
Jan
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