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[Klaus Thoeni <question244203@xxxxxxxxxxxxxxxxxxxxx>]

Question #244203 on Yade changed:
https://answers.launchpad.net/yade/+question/244203

Klaus Thoeni proposed the following answer:
Maybe use a PyRunner:

def addForces():
	for b in O.bodies: # if the force is only applied to specific forces use a defined list instead of O.bodies
		f=... # your force vector, you can calculate it here
		O.forces.addF(b.id,f,True)

O.engines=[
	PyRunner(initRun=True,iterPeriod=100000,command='addForces()'), # will be called every 100000 time steps
	ForceResetter(),
	... # your engines
	]

etc.

Klaus

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