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Re: [Question #688370]: Two concentric cylinders but subtracting out the inner cylinder

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Jan Stránský <question688370@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 30 Jan 2020 21:09:37 -0000
Reply-to: question688370@xxxxxxxxxxxxxxxxxxxxx
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Question #688370 on Yade changed:
https://answers.launchpad.net/yade/+question/688370

    Status: Open => Answered

Jan Stránský proposed the following answer:
pack.randomDensePack has predicate as a parameter.
You are using makeCloud, which is only initiated in a "box". You need to filter the packing to "crop" particles you don't want:
###
sp=pack.SpherePack()
sp.makeCloud(...)
predicate = pack.inCylinder(paramsOuter) - pack.inCylinder(paramsInner)
sp = pack.filterSpherePack(predicate,sp,returnSpherePack=True) # [1]
sp.toSimulation()
###

cheers
Jan

[1] https://yade-dem.org/doc/yade.pack.html#yade.pack.filterSpherePack

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