[Sidefx-houdini-list] randomize P[y]

Gregory Ecker gregory.ecker at gmail.com
Fri Jan 20 17:41:36 EST 2017


 maybe just randomize an attribute 'like offsetY' and add that to your P in
a wrangle after the randomize.

 -G

On Fri, Jan 20, 2017 at 5:37 PM, Gary Jaeger <gary at corestudio.com> wrote:

> Thanks Neil. Just to be able to do a random distribution of P[y] so that
> my little boxes are randomly placed on the y axis. For instance, if you put
> an attribrandomize beneath the scatter, set it to P, set Dimensions to 1and
> mess with the scale, you can scaled random placement on the X. I assume
> because X is the first of [x,y,z]. But what if you want the same for Y? Or
> Z for that matter. i.e. don’t touch X or Z, but randomize Y.
>
> Gary Jaeger / 650.728.7957 direct / 415.518.1419 mobile
> http://corestudio.com <http://corestudio.com/>
> > On Jan 20, 2017, at 10:30 AM, Neil Dickson <ndickson at sidefx.com> wrote:
> >
> > "While P works in the Attribute Name (and randomizes all three values),
> > P[y] doesn’t. Why is that?"
> >
> > Sorry for the silly answer, but it's because "P[y]" isn't an attribute
> > name.  I agree that it's a bummer that it doesn't yet have a special case
> > to write to just *part* of an attribute, something like "P.y" or "P[1]"
> > meaning the second component of P.  Please feel free to submit an RFE.
> You
> > can also write to an attribute named y, and then do @P.y = @y; in an
> > Attribute Wrangle afterward.
> >
> > It's also just VEX inside, and most of the distributions are just
> > delegating to VEX functions for sampling the distribution, so you can put
> > together a custom thing fairly easily.  What distribution did you want to
> > sample for the P.y values?
> >
> > Cheers,
> > Neil
> >
> > On Fri, Jan 20, 2017 at 1:02 PM, Gary Jaeger <gary at corestudio.com>
> wrote:
> >
> >> I was playing around with a basic setup using boxes copied to a scatter,
> >> then using attribrandomize nodes below the scatter to muck things up. I
> >> decided I’d try to just randomize only the y position. While P works in
> the
> >> Attribute Name (and randomizes all three values), P[y] doesn’t. Why is
> >> that?  I’ve tried different combinations of Dimensions etc but now I’ve
> >> given up.
> >>
> >> Gary Jaeger / 650.728.7957 direct / 415.518.1419 mobile
> >> http://corestudio.com <http://corestudio.com/>
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