Question about pfLightModel and pfLightSources??

Duvideo (duvideoii++at++mail.telepac.pt)
Fri, 20 Sep 1996 20:00:40 +0100

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I'm having some difficulties in understanding how lighting works.

Fact 1: I need a pfLightModel to be able to use lights.
Fact 2: I need at least one pfLight in the scene.

Conclusion 1: pfLightModel is not a light. Correct?

Question 1: Why can we set the pfLightModel AMBIENT color?
Question 2: If I set pfLightModel ambient color to YELLOW and create
        a pfLightSource with BLUE ambient color...
                ...what color am I supposed to get?

Question 3: If I have individual (for each pfLightSource) control
        of attenuation, ambient color and a lot of other parameters
        common to pfLightModel...
                ...why do I need to set them in the pfLightModel?

thanks
        Duvideo

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