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directx lighting

Started by stickben Jan 23, 2003 at 1:51 PM 2 replies 650+ views

Original Post

Jan 23, 2003 at 1:51 PM

Hi!, Im really new to the directX community and I was wondering if someone could give me a hint about how to do lighting. Currently I have a program that generates terrain and puts a texture over it, I can adjust the levels of lighting, but there is no shadow around the tops of peaks, and it always looks the same no matter what angle you look at it. Any sugestions? Thanks! Ben

Cold_Steel

103

Cold_Steel

Jan 23, 2003 at 6:07 PM

Do mean that the back side is not dark at the top of the peak like it should be? If you do, you may need to adjust the normal vector at the vertex or vertices that form the peak. If the vertex is for both a front face and a back face, and the normal is and average between the two, then it may not look right. To may need to point that vertex normal away from the light some more. This only applies if you are lighting per vertex. IF you are lighting per face, then I have no idea what''s wrong. Hope this helps.

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stickben

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stickben

Jan 23, 2003 at 7:07 PM

OK, ya I think its the normals, right now every normal was set to 0,0,0.

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