[Sidefx-houdini-list] Prim intrinsic in CHOP

Neil Dickson ndickson at sidefx.com
Wed May 17 13:16:52 EDT 2017

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.


On Wed, May 17, 2017 at 12:17 PM, Olivier Jeannel <facialdeluxe at gmail.com>

> 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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