Re: Color Intensity with No Lights

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Angus Dorbie (dorbie++at++sgi.com)
Tue, 06 Apr 1999 15:55:23 -0700

Bryan Fricke wrote:
>
> Hello -- I am new to Performer and have a basic question.
>
> When I run Perfly with any given database file loaded and I *turn off*
> lighting, I see an image that has a reasonable intensity. However, when I
> modify one of the sample programs (e.g., simple.c) so that no light source
> is added to the scene, a given database will look much darker than it did in
> Perfly.
>
> To correct this problem, I have tried to "disable" lighting. I did so by
> issuing the following command:
>
> pfDisable(PFEN_LIGHTING);

You need to do this in the draw then pfOverride(PFEN_LIGHTING, PF_ON);

>
> I put this command in several places in the program, but it didn't seem to
> help.
>
> So my question is as follows - How do I display a scene with the intensity
> set to a reasonable level(i.e., the color intensity actually specified for a
> given polygon or vertex in the database file) when no light source is
> present?
>
> Thanks in advance,
> Bryan Fricke
>
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-- 
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For advanced 3D graphics Performer + OpenGL based examples and tutors:
http://www.dorbie.com/

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