[Plib-devel] key frame animation approach - aka Dance Moves

[Dave M. <Dav...@dy...>]

In order to implement key frame animation from ASE files (TM_ANIMATION
samples) I need a selector that can choose between ssgTransforms.  I am
considering the following approach:

use a ssgSelector (or derived class) branch.  the branch would have
ssgTransform kids all sharing a single ssgVtxTable kid.  the selection would
cull the correct transform to be applied to the kid.

The problem with this approach is the limit of 32 total selections.  The
selector branch may easily have hundreds of transform keys to guide a camera
around the scene or a bird in it's flight path.  I'm trying to get a
humanoid figure to do a single dance move and it takes around 70 keys to
finish the spin.

my approach is to create a ssgBaseSelector to remove the limit of 32 total
selections.  the constructor will take a count 'ns' and i'll use a flag
array to keep track of the selections for culling.  This should not impact
any existing code.  ssgBranch will construct a ns=32 ssgBaseSelector.  This
change will not happen until 1.3 development gets underway.

Any comments or suggestions?

--Dave McClurg