yade-users team mailing list archive

[Anton Gladky <gladky.anton@xxxxxxxxx>]

Hi,

please, see an example
./examples/regular-sphere-pack/regular-sphere-pack.py

There you can find enough examples with diferent packing ways.

Anton



On Fri, Nov 19, 2010 at 1:40 AM, Klaus Thoeni <klaus.thoeni@xxxxxxxxx>wrote:

> Hi Václav!
>
> > > pack.inAlignedBox just works for a box which is aligned to the
> coordinate
> > > system. Is there a way to get an arbitrary aligned box (e.g. by
> > > transforming the aligned box)?
> >
> > If you need the sphere packing, you can transform it with
> >
> https://www.yade-dem.org/sphinx/yade.pack.html#yade._packSpheres.SpherePack
> > .rotate . Let me know if that is not enough for your purposes.
>
> Well, use pack.regularHexa(...) with pack.inAlignedBox. Is there a way to
> create such packings with pack.SpherePack()? Or how can I convert it in a
> SpherePack()? I tried to pass the regularHexa packing to the SpherePack,
> dosen't work. If this is going to work somehow it would be enough for my
> purposes.
>
> Example:
> pred=pack.inAlignedBox((10.,0.,0.),(20,20,1.5))
> hexapack = pack.regularHexa(pred,radius=0.5,gap=0.0,color=(0,1,0))
> #O.bodies.append(hexapack)
> sp=pack.SpherePack(hexapack) # not working, what should I use?
> sp.rotate((0,1,0),-pi/4)
> O.bodies.append([utils.sphere(c,r) for c,r in sp])
>
> > The reason I did not create general box orientation is that checking
> > whether particle is inside or outside is more complicated; but now I
> > have the idea that it could be actually done by keeping corners and box
> > transformation in the predicate, then transforming points to be checked,
> > rather than checking points against true (non-aligned) boundaries.
>
> Hm, I am a newbie and I still have to understand the difference between the
> two
> packing options. By the way, what's the difference? Can't you just use
> predicates?
>
> > > Is there a way to generate particles on a plane (e.g. gts-surface)?
> >
> > Probably not directly (though you could create a thin volume for
> > instance). Can you be more specific as to what usage you have in mind?
>
> Thin volume works fine.
>
> Thanks
>
> Klaus
>
>
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