[Sidefx-houdini-list] Maya .anim curves in Houdini

Andrew D Lyons tstexture at gmail.com
Wed Feb 21 15:01:29 EST 2007

Yep - we have some tools to sample values out per frame, but ideally
we can hand channels back and forth between Maya and Houdini once or
twice with no (major) precision problems. We also don't want to bring
in Maya key frame animation and hand back a sample per frame channel.
Animators aren't going to be happty about that if they need to tweak
some curves...

Hmmm. Collada?


On 21/02/07, Lucio Flores <dogboy_l at yahoo.com> wrote:
> --- Andrew D Lyons <tstexture at gmail.com> wrote:
> > Hi Lou,
> >
> > I implemented something like that, but when I was comparing sampled
> > Maya and Houdini keyframes in CHOPS, I found minor numeric differences
> > (+/-0.003 for extreme slopes). That's a big problem for camera
> > rotation channels.
> >
> > I wrote the converter in python using functions from the math module.
> > Python uses doubles exclusively, so I'm guessing the problem is deep
> > somewhere in the keyframe functions, or the way they are evaluated.
> >
> > How accurate was the one you wrote, and how did you implement it?
> >
> > Cheers
> >
> It worked enough that we could look at the raw values, and they would be dead
> on. But come to think of it, when translating bewteen different packages, we
> would always sample it down to a sample per frame, just to eliminate *any*
> cause for suspicion. You could get something working 99% of the time, then at
> the 11th hour, some characters are sliding against a plate or other elements,
> and they call you into that meeting and everyone is sweating. It just buys you
> a piece of mind for yourself, and it doesn't take up much disk space.
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Andrew D Lyons | Digital Artist | http://www.tstex.com

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