Question #702412 on Yade changed:
https://answers.launchpad.net/yade/+question/702412
Status: Open => Answered
Bruno Chareyre proposed the following answer:
Hi,
If there are only two bodies O.forces.f(0) and O.interactions[0,1] should be
the same.
Except that the first will not give an error when there is no interaction.
Alternatively, this boolean could help:
O.interactions.has(0,1)
Cheers
Bruno
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