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Re: [Question #696759]: How can polyhedron use CpmMat 、Ip2_CpmMat_CpmMat_CpmPhys()and Law2_ScGeom_CpmPhys_Cpm() ？

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Jan Stránský <question696759@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 12 May 2021 09:25:48 -0000
Reply-to: question696759@xxxxxxxxxxxxxxxxxxxxx
Sender: bounces@xxxxxxxxxxxxx

Question #696759 on Yade changed:
https://answers.launchpad.net/yade/+question/696759

    Status: Open => Answered

Jan Stránský proposed the following answer:
CpmState() is "fresh" e.g. with zero mass (after O.step, pos is NaN because of zero mass and therefore "disappeared"), you have to "clone" the state:
###
oldState = poly1.state
poly1.state = CpmState()
poly1.state.mass = oldState.mass
# same for inertia, ori, ...
###

cheers
Jan

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