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Re: [Question #681246]: something do not understand about code in polyhedra_ig2.cpp


Question #681246 on Yade changed:

    Status: Open => Answered

Jan Stránský proposed the following answer:

> question1

for non-periodic simulations, it is Vector3(0,0,0)
for periodic simulations, is is shift of the second body to make the interaction meaningful

> question2

se31.position would be in python state.pos
**usually** it is the center of mass. But in general b.state.pos and b.shape.v can be quite independent.


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