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[Jan Stránský <question665379@xxxxxxxxxxxxxxxxxxxxx>]

Question #665379 on Yade changed:
https://answers.launchpad.net/yade/+question/665379

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hello Andrea,
shift2 is used for periodic contact detection, have a look at [1]. See [2] for the meaning of Interaction::cellDist.
cheers
Jan

[1] https://github.com/yade/trunk/blob/master/pkg/common/InteractionLoop.cpp#L113
[2] https://yade-dem.org/doc/formulation.html#collision-detection-in-periodic-cell

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