Question #694056 on Yade changed:
https://answers.launchpad.net/yade/+question/694056
Status: Open => Answered
Jérôme Duriez proposed the following answer:
Hi,
There is no reason to distinguish between n and -n for a contact normal.
Polar representations spanning 180° are then just fine, you do need to
cover the 360°.
PS: the "W" in "MWS" is obviously insincere ;-)
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