stryx, could you please explain me how does this work?
if you have any link for tutorials or similar could you post them please?

tnx

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There aren''''t problems that can''''t be solved with a gun...

Read this and all things cited in it.


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NeHe has a tutorial about it.
Check out http://nehe.gamedev.net

The only "difference" between the NeHe method and Carmack''s Reversed is that u build the shadowvolume by extrudeing the vertexes to get the shadowvolume... so you don''t have to find the silouette.
I don''t know if the NeHe algorithm works if the view is in the Shadow.
Read the Gamedev article and you''ll know whats the difference between all the methods of doing Stencil Shadows.
greets.
stryx
(well. nvidia has a nice article too with demo and sourcecode.)
(something like "Robust Shadow Volumes")

quote:

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Original post by stryx
The only "difference" between the NeHe method and Carmack''s Reversed is that u build the shadowvolume by extrudeing the vertexes to get the shadowvolume... so you don''t have to find the silouette.

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There is more than one difference between them, and what you mentioned certainally isnt it. If youre doing that, youre doing something very wrong indeed.

You still have to find the silhouette with carmacks reverse... the differences are the stencil ops used, and that you cap both the front and back of the shadow volume.

Yup Maximus, you''re right.

glDisable(GL_DEPTH_TEST);
and Maybe glEnable(GL_BLEND);

Bobby