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[Jan Stránský <question658699@xxxxxxxxxxxxxxxxxxxxx>]

Question #658699 on Yade changed:
https://answers.launchpad.net/yade/+question/658699

    Status: Open => Answered

Jan Stránský proposed the following answer:
Thanks for the code, it is much clearer now :-) you have to cancel the enlargements after the first O.step:
###
O.engines=[
        ForceResetter(),
        InsertionSortCollider([Bo1_Sphere_Aabb(aabbEnlargeFactor=1.5,label='bo1'),......
        InteractionLoop(
                [Ig2_Sphere_Sphere_ScGeom(interactionDetectionFactor=1.5,label='ig2'),....
   ....
]
O.trackEnergy=True
O.step()
bo1.aabbEnlargeFactor = 1. # !!
ig2.interactionDetectionFactor = 1. # !!
...
###

also note that len(O.interactions) and len([i for i in O.interactions]) may differ
len(O.interactions) ... includes also potential interactions
len([i for i in O.interactions]) ... only counts real interactions

cheers
Jan

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