Re: Getting Gouraud Color

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Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Wed, 22 Jan 1997 02:54:56 +0000

This is a linear interpolation in screen space.

Problems will arise if you want to calculate this for projected
screen space and the line is in perspective because the colour
interpolation is not perspective correct. This gets real fun
when you clip the line because the colour gets shaded from the
interpolated clipped line end colour.

Could you give a little more info on why you want to do this so
I can better understand how these issues might relate to you?

Cheers,
Angus.

On Jan 21, 5:58pm, SCOTT OFRIEL wrote:
> Subject: Getting Gouraud Color
> Subject: Time: 5:42 PM
> OFFICE MEMO Getting Gouraud Color Date: 1/21/97
>
> Performer:
>
> Is it possible to get the RGB color value from any place between the two end
> points of a Gouraud shaded line? The line is a pfGeoSet.
>
> Thank you,
> Scott O'Friel
>
>
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>-- End of excerpt from SCOTT OFRIEL

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