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Re: [Question #695558]: Dynamics of pfacet object does not appear to be correct

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Rohit John <question695558@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 15 Feb 2021 22:55:52 -0000
Reply-to: question695558@xxxxxxxxxxxxxxxxxxxxx
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Question #695558 on Yade changed:
https://answers.launchpad.net/yade/+question/695558

Rohit John gave more information on the question:
I found that the order of defining the pfacet faces is affecting the rotation.  For 
pfacet_nodes = [
    [nodes[0], nodes[2], nodes[1]],
    [nodes[0], nodes[1], nodes[3]]
]

The object is rotating about the z-axis.  For 
pfacet_nodes = [
    [nodes[0], nodes[1], nodes[2]],
    [nodes[0], nodes[1], nodes[3]]
]

The object is rotating about the y-axis. This behaviour seems very
unnatural.

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