Re: Quick question about TexGen.

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Angus Dorbie (dorbie++at++sgi.com)
Wed, 17 Feb 1999 18:22:22 -0800

Depends where you generate the coordinates.

You have 2 choices, object or eye space.

One is before modelview and the other is after the modelview matrix.
This ofcourse determines which vertex coordinate is used for the
comparrison with the texgen plane equations to produce the various
coordinates.

Then once generated the texture coordinate is transformed through the
texture matrix which you can load with anything even projective matrix.
Typical operations are shadowing the model matrix or inverse view matrix
in order to produce 'world' space coordinates.

There's a detailed description in the "Aqua" section and more in the
"UAV" section of www.dorbie.com.

Cheers,Angus.

Kenneth R. Sewell III wrote:
>
> When does TexGen generate texture coords? I am using TexGen on a model
> and I would like to generate texture coords, and then distort the
> model. Is there anyway to control when the Texcoords are generated?
> Thanks.
>
> Ken
> Sewell++at++siscom.net
>
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http://www.dorbie.com/

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