Question #691277 on Yade changed:
https://answers.launchpad.net/yade/+question/691277
Status: Open => Answered
Jan Stránský proposed the following answer:
Hello,
particles are free to move arbitrarily, regardless dimension of the periodic
cell.
Just for the contact detection phase (and Yade GUI display), the positions are
**virtually** wrapped into the cell (+- one period).
If instead of true particle position you want the wrapped positions, use [1]
and export O.cell.wrap(b.state.pos) instead of b.state.pos (or do it in the
post-processing phase).
Both approaches (true and wrapped position) are reasonable and have their use
cases.
cheers
Jan
[1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Cell.wrap
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