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[Bruno Chareyre <question294519@xxxxxxxxxxxxxxxxxxxxx>]

Question #294519 on Yade changed:
https://answers.launchpad.net/yade/+question/294519

Bruno Chareyre posted a new comment:
>it is not possible to actually update verletDist during the simulation

It is possible of course. 
The main problem is that the collider is smart: if the grains do not move (as in your exemple) there is no need to detect new collisions.
Consequence: the lines after "# Attempting to introduce distant interactions" are not doing anything
You can check in the 3D view, the bounds are not modified. The new sizes would be accounted for only after the next colliding step (give a velocity to one body, bounds will change).

>As for runEngine(), I confirm adding O.runEngine(O.engines[1]) before
O.step() is enough

I see. runEngine() skips the check InsertionSortCollider::isActivated(),
so you get something even if it would not normally run.

In the long run, I think this question of creating distant interactions
should be solved without the collider because it has different
requirements compared to detecting collisions.

Bruno

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