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

Gerbrand Nel g at cannonballbunny.com
Thu Aug 16 06:41:13 EDT 2018


I tried setting the pivot from centroid to origin in the assemble sop. 
Didn't work
The transform pieces sop seems to work a bit better.
Thanks guys
On 2018/08/15 21:12, Nikita Musatov wrote:
> 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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