transition shapes 2004-04-30 - By David Gallagher
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Ok. So you make the shapes as normal, then make a custom PPG to control them.
Instead of dragging the shape weights onto it, you set up a custom relationship
(like maya's SetDriven Keys) where the same slider drives two or more shapes in
sequence. Hmmm. Makes sense, if not quite as automated. Thanks Andre.
Andre DeAngelis wrote:
> This is indeed doable Dave, and pretty easily for that matter.
>
> When setting up a Slider parameter to go from shape A to shape B via shape
> C, it just means setting relative values for the respective shapes and
> linking their weights to the slider. What's even more neat is that you can
> then go in and edit the relation F-cruves that are produced or if you
> prefer, edit the expression that controls the relation.
>
> This way you can effectively use a slider to control a whole sequence of
> shapes - say a face going from happy to sad.
>
> It's pretty amazing once you see it. Also, you might be interested to know
> that XSI 4.0 alklows you to bake a shape animation seuqnce into a clip which
> extends this functinality even further.
>
> BTW. I never quite understood what was unique about the approach used to
> animate Gollum's face and how is varied from the Transitio Shape approch.
When you dial in shape A to near full strength, then dial in a quite different
shape B to near full strength, instead of getting mush, you custom make a
combination shape. I imagine it was just one huge expression determining which
blendshape it gave you at any time.
There were something like 900 shapes, most of them correction shapes.
> AD
--
David Gallagher
Animator, Blue Sky Studios
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