Re: OBJ ???

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Angus Dorbie (dorbie++at++multipass.engr.sgi.com)
Thu, 15 Jan 1998 19:27:50 -0800

On Jan 14, 7:01pm, A. Ballard Andrews wrote:
> Subject:
> hi there,
>
> I'd like to know the difference between
> Performer's and Inventor's hierarchy is.

The biggie is that state is encapsulated in the leaves.

If I build an inventor graph and apply state changes in the graph
the drawing traversal order guarantees that they happen incrementally
top down left to right. This constrains the optimization of the
rendering because generally you can't reorder the rendering.

Performer doesn't allow this so one part of the scene doesn't depend
on another for it's appearance.

Cheers,Angus.

-- 
  "The Revolution 3D can be thought of as a chariot being pulled by three
powerful horses, each representing 3-D, 2-D and MPEG acceleration. While
many competing technologies may offer three horse chariots, often only
one of the three horses is fast" - industry analyst Richard Doherty,
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