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[Jérôme Duriez <question703948@xxxxxxxxxxxxxxxxxxxxx>]

Question #703948 on Yade changed:
https://answers.launchpad.net/yade/+question/703948

    Status: Open => Answered

Jérôme Duriez proposed the following answer:
Hi,

Mass density is stored in 
b.mat.density # with b a Body

Please note that a manual update of density (after the body has already
been created) does not directly reflect onto b.state.mass or
b.state.inertia. You also have to manually update those accordingly

GlobalStiffnessTimeStepper is something to automatically compute and
assign a suitable time step, I can not think of a relation with what I
understand from your question.

For more details, please precise your question (which roughness are you
speaking about, for instance ?)

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