Re: local -> world coordinates

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Angus Dorbie (dorbie++at++multipass.engr.sgi.com)
Wed, 20 Aug 1997 21:02:30 -0700

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On Aug 20, 11:59am, sbrown++at++nestor.ucsd.edu wrote:
> Subject: local -> world coordinates
>
> Hi -
>
> I'm wondering if there is a simple way to get world coordinates from a
> local coordinate system.
>
> My working knowlege of performer matrix operations is limited, so If this
> requires matrix operations, an example would be a big help.

You transform the vertex through the matrix of the
local transformation.

Example Code:

For coords:

coordvec->xformPt(coordvec, modelmatrix);

For normals:

normvec->xformVec(normvec, modelmatrix);

Cheers,Angus.

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