IV file format

Chris Cederwall (ceder++at++pbi.net)
Thu, 19 Oct 95 09:55:37 PDT

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You may want to start thinking about a way filter all your
existing models in Inventor so that they are fully CCW and
ready for backface on. You will see a 15-25% performance
increase.

I did something like this last year with information found
in the example code of "ivnorm" and the auto-orient portion
of the pfd performer libs.

However if you have completely messed up normals you will
have to blow them away and regenerate them from any method
like.

The above filter compares the normal found in the data vs. one
derived on the fly.

ceder++at++pbi.net
chris.

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