[Bf-committers] Updated (working!) patch for NLA Action Baking

[malefico andauer]

Truly amazing !!!!

Going to try ASAP !


Kind regards and thank you !

malefico.

 --- Roland Hess <rolandh at reed-witting.com> escribió:

>
http://projects.blender.org/tracker/?func=detail&aid=3634&group_id=9&atid=127
> 
> This monster patch adds Action Baking capabilities
> to NLA. With an 
> armature and action strip selected, and the mouse
> hovering over the 
> action in NLA, pressing SHIFT-B brings up the Bake
> menu, to which 
> there are three options.
> 
> The first, Bake Object to Action, creates a new
> action and appends it 
> to NLA that attempts to recreate object-level motion
> (due to 
> keyframing, constraints, parenting, etc.) at the
> bone level. When it 
> creates the Action, it also unlinks object IPOs and
> parenting (still 
> working on removing object-level constraints). The
> net effect is that 
> you now have an action that duplicates the motion of
> the armature as 
> a whole.
> 
> The second, Bake NLA Action, creates a new action
> and appends it to 
> NLA that attempts to burn all NLA actions into a
> single action strip. 
> This could be helpful if you have created a complex
> character 
> animation you would like to tweak and sweeten, but
> it consists of 
> multiple walkcycles and numerous other strips.
> Baking into a single 
> strip allows to you to work with the animation along
> a single 
> timeline.
> 
> The third, Bake All to Action, first performs Bake
> Object to Action, 
> then Bake NLA to Action, creating in the end a
> single action strip 
> that contains keyframing information for your entire
> character 
> animation. More extensive notes on
> shortcomings/possible expansion 
> can be found in the patch tracker.
> 
> I would NOT call this patch finished, but it has
> almost reached the 
> limits of my c programming capabilities. I worked on
> this as a way to 
> help Orange with it's action baking needs, and am
> hoping that a 
> better programmer up the chain here can perhaps do
> some optimizations 
> on the code. In particular, the function that
> generates a list of 
> keyframes to sample from the NLA seems to be
> spectacularly 
> inefficient, but it's the only way I can think of to
> do it. Also, it 
> would be better to only set keys on pose channels
> that already have a 
> key on that frame. I'm not sure if it's possible,
> but when baking, 
> you want to shoot for the fewest relevant keys.
> 
> Three notes:
> 
> 1. When I started working on this, I thought I was
> working on a clean 
> checkout of bf-blender, but was not. So, this patch
> also contains the 
> MatchMoving feature I've developed. Orangers (and
> others) might find 
> it useful.
> 
> 2. To make the NLA strip for Object-level motion
> blend properly in 
> NLA, I had to add a new NLA blend type: Multiply.
> Try it out.
> 
> 3. I don't know what the hell I'm doing. Most of the
> coding I've done 
> here is C&P from other parts of the Blender sources.
> New functions 
> have been placed next to the ones I was cribbing
> from. If questions 
> arise as to "why did you put that function in that
> file" or "why did 
> you make function x non-static instead of just..."
> they can most 
> likely be answered by the fact that I didn't know
> how to do it any 
> other way. Suggestions/rewrites are welcome.
> -- 
> Roland Hess - harkyman
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>
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