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[mohsen <question293216@xxxxxxxxxxxxxxxxxxxxx>]

Question #293216 on Yade changed:
https://answers.launchpad.net/yade/+question/293216

mohsen posted a new comment:
Hi Felipe and Jan
Jan i also have some trouble with making a predicate!
generally when i using randomDensePack, i encounter some errors or warnings that i can not understand their meanings!
Jan can you help us about "memoizeDb"? I think some errors is because of this.

in the following is my simple code and warnings:

#######
## construct the predicate first
pred=pack.inCylinder(centerBottom=(0,0,-.1),centerTop=(0,0,.1),radius=.05)
## alternatively: pack.inHyperboloid((0,0,-.1),(0,0,.1),.05,.03)

## pack the predicate with spheres (will be explained later)
spheres=pack.randomDensePack(pred,radius=8.5e-3)

## add spheres to simulation
O.bodies.append(spheres)

################
Warnings:
WARN  /build/yadedaily-1.20.0-126-e3271e8~trusty/pkg/dem/SpherePack.cpp:104 makeCloud: porosity must be >0, changing it for you. It will be ineffective if rMean>0.
/usr/lib/x86_64-linux-gnu/yadedaily/py/yade/pack.py:296: FutureWarning: The default behavior will change; specify returnSpherePack=True for the new behavior, and False to get rid of this warning (your code will break in the future, however). The returned SpherePack object can be added to the simulation using SpherePack.toSimulation()
  warnings.warn('The default behavior will change; specify returnSpherePack=True for the new behavior, and False to get rid of this warning (your code will break in the future, however). The returned SpherePack object can be added to the simulation using SpherePack.toSimulation()',category=FutureWarning)
/usr/lib/x86_64-linux-gnu/yadedaily/py/yade/pack.py:301: UserWarning: Packing's dimension (Vector3(0.09220547603362886,0.09204759935856582,0.1700020579236124)) doesn't fully contain dimension of the predicate (Vector3(0.1,0.1,0.2)).
  if dimP[0]>dimS[0] or dimP[1]>dimS[1] or dimP[2]>dimS[2]: warnings.warn("Packing's dimension (%s) doesn't fully contain dimension of the predicate (%s)."%(dimS,dimP))

############

2- another problem is that the spheres in generated pack have overlap!! 
How can we avoid this? ( I know that the over lap is removed if we give a number to spheresInCell, i.e activating periodic condition. but is there any other way to have a aperiodic scene without overlap)
Is there another method to construct a cylinder filled with spheres with no initial overlap?

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