[Algorithms] Stripping scaling out of a hierarchy.

[<lei...@co...>]

Hello everyone. 

  My XSI exporter supports exporting a small hierarchy of objects.  One 
of it's uses is to allow the game to find parts like the tracks, body, 
wheel, turret etc.  All works fine until I purchased some models that 
are the wrong scale and I decide to scale them in XSI to 1 unit is 1m.  
Now my hierarchy has scaling in it.  This becomes a mess with bounding 
volumes on parts and frame of references having scaling in it.  I 
finally found an option in XSI to freeze all the scaling but I was 
wondering how can I have my build tool do the same thing so that I won't 
have problems down the road?  Also its bugging me.

 I tried resolving all the nodes into model space and then using inverse 
transforms to resolve the local transforms on each part.  It didn't work. 

Leigh