Re: [Flightgear-devel] Model animation help?

[Ron J. <wi...@je...>]

On Tue, 2009-12-15 at 10:25 -0600, Curtis Olson wrote:
> Hi,
> 
> I'm looking for a developer who can help me get over the hump with
> animating and AC3d model.  This model is of a human figure.  It is a
> very basic/simple model, but unfortunately I don't have permission to
> openly share it.  I can send someone a private copy though if there is
> someone willing to help me out.  (Again, the model is nothing special,
> you guys would look at it and say we have better figures already in
> FlightGear, I just haven't been given permission to post it on the
> world wide web.)  I'm getting hung up trying to find the correct x,y,z
> locations for limb animation.  In flightgear, are the coordinates we
> specify as the center point of rotation global (i.e. relative to the
> whole model?)  Or are they relative to the local coordinate system of
> the sub-component?  Since this is a simple human figure, there is some
> cascading / grouping I want to maintain ... i.e. a shoulder rotation
> and then an elbow rotation.

Coordinates are in ac3d units centered about the origin of the model.  

> I looked at the Osprey and see that some really amazing cascading
> animations are definitely possible in FlightGear, I just haven't quite
> sorted out coordinate systems.  Is there anyone with ac3d model
> animation experience who'd be willing to take a quick look at this and
> help nudge me in the right direction?
> 
> Thanks in advance,
> 
> Curt.

I will take a look and give you some hints, but won't be around my
e-mail for the next 8 hours or so...

Ron