[Sidefx-houdini-list] Prim intrinsic in CHOP

Olivier Jeannel facialdeluxe at gmail.com
Wed May 17 14:29:30 EDT 2017


Hey Neil,
"intrinsic:transform" doesn't seem to be recognized either. (but possibly
I'm doing it wrong)

How do you set the pointinstancetransform intrinsic on the primitives to 1 ?
Wrangle ?
Do you have any doc or example ?

Thank you :)



2017-05-17 19:16 GMT+02:00 Neil Dickson <ndickson at sidefx.com>:

> I don't know which CHOP you're talking about, (since I'm not very familiar
> with CHOPs either), but does specifying the name "intrinsic:transform"
> work?  If not, could you submit an RFE for it with an example HIP file?
>
> Also, there's an option for packed primitives to automatically use the
> transformation attributes that the Copy to Points SOP and other SOPs use,
> like P, N, up, pscale, pivot, orient, rot, scale, xform, etc, so you might
> be able to use those.  You'll have to first set the pointinstancetransform
> intrinsic on the primitives to 1.
>
> Cheers,
> Neil
>
> On Wed, May 17, 2017 at 12:17 PM, Olivier Jeannel <facialdeluxe at gmail.com>
> wrote:
>
> > Hi,
> >
> > I rarely use CHOP.
> > The only use I found (that was explained to me by my friend Jerome
> > Pastorello) is to use a CHOP network to add some Jiggle on the Position
> and
> > on the Orient of some already animated points.
> >
> > Basicly the CHOP nicely overshoots the P and Orient, resulting in a
> > pleasant "boing" effect.
> >
> > Now I'm working with some packed primitives.
> > I animate them directly in vop by setting their Intrinsic transform
> > attribute (rotation and position in a matrix)
> >
> > My deepest wish would be to apply this CHOP effect to the intrinsic
> > transform (matrix).
> > But since this attribute is a Primitive, is this possible ?
> > If it is possible, what is the name of the attribute in the CHOP ?
> > "transform" doesn't seem to be accepted.
> >
> > Thank you :)
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