[Sidefx-houdini-list] copy to points of a bullet simulation weirdness

Nikita Musatov not.a.whale at gmail.com
Wed Aug 15 15:12:58 EDT 2018


As alternative, you can write your own code to transfer transformation. You
can set intristic attribute transformation from point to new piece.

On Wed, Aug 15, 2018, 19:53 Koya Masubuchi <msbck0mp at gmail.com> wrote:

> I think you can use the Transformpieces SOP.
> It's the easy way to transfer sim result with a low res geometry to a high
> res, but I could be wrong.
>
> Koya
> > On Aug 15, 2018, at 11:02 PM, Fran├žois Duchesneau <houdini at trinix.ca>
> wrote:
> >
> > Hi Gerbrand,
> >
> > It may not be that but when you pack your object there are two options
> for the Pivot Location, Centroid and Origin. I think I once had to change
> that in order to fix the kind of issue you're having.
> >
> > Francois
> >
> >> On 08/15/2018 09:46 AM, Gerbrand Nel wrote:
> >> Hi guys
> >>
> >> I ran into something that probably makes sense if you know what the f
> you are doing, but I didn't expect it to work like this, and it's ruining
> my shit.
> >>
> >> I have the following following:
> >>
> >> I do a bullet RBD sim, use dopimport to import the sim back into sop
> land.
> >>
> >> now you have the option to import the points of the packed primitives,
> but when you copy objects to these  points, there is an offset on the pivot
> of each object.  If you un-check "transform using point orientation" the
> offset goes away, but you have now lost your orientation.
> >>
> >> If I delete the pivot attribute, the points position is where it needs
> to be, but now the orientation doesn't line up to the simulation.
> >>
> >> I'm doing this, because I want to sim with a low ress version of my
> geometry, and then copy the highress geo to the simmed points representing
> the packed primitives.
> >>
> >> Can someone maybe point me in the right direction?
> >>
> >> Thanks
> >>
> >> G
> >>
> >>
> >> ---
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