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

Fran├žois Duchesneau houdini at trinix.ca
Wed Aug 15 10:02:48 EDT 2018

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.


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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