[osg-users] Emulate Fog with TexGen

[Bradford, Chase]

Hey Everyone,

 

I've been trying to emulate a fade to transparent effect (think of a
linear fog that works on alpha, not color) using a 1D texture with 2
texels, 0 = opaque, 1 = transparent.  My problem is with generating the
texture coordinates

 

I thought I could use a texgen with EYE_LINEAR and an s plane of (0, 0,
1/far_dist, 0) but that doesn't produce the correct result. The
texture's wrap mode is GL_CLAMP.  I've also tried negating 1/far_dist.

 

Am I doing anything obviously wrong?

 

Thanks for any info,

Chase

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