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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