Original Post
I''m just wondering - are there any openGL extensions that support a way to use volumetric fog, using a form of glFogCoordfExt(), with indexed vertex arrays? thanks for any input.
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glFogCoordfEXT
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no
There definitely are, I have used them in my first terrain engine:
PFNGLFOGCOORDPOINTEREXTPROC glFogCoordPointerEXT;
...is the declaration you need, initialize it the same way as all other extension entry points.
I used it like this:
glEnableClientState( GL_FOG_COORDINATE_ARRAY_EXT );
glFogCoordPointerEXT( GL_FLOAT, 0, fpFogCoordArray );
so i ASSUME ( hope my memory serves me here ) that the 0 is the amount of packing (i.e. bytes between entries in the array i pass it) the last param is the array itself.
hope this helps, and if not at least you now know which function to google for.
Rob
PFNGLFOGCOORDPOINTEREXTPROC glFogCoordPointerEXT;
...is the declaration you need, initialize it the same way as all other extension entry points.
I used it like this:
glEnableClientState( GL_FOG_COORDINATE_ARRAY_EXT );
glFogCoordPointerEXT( GL_FLOAT, 0, fpFogCoordArray );
so i ASSUME ( hope my memory serves me here ) that the 0 is the amount of packing (i.e. bytes between entries in the array i pass it) the last param is the array itself.
hope this helps, and if not at least you now know which function to google for.
Rob
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