🚀 go-pugleaf

There's the post texture specular highlight in OpenGL 1.2 which may be
there as an extension before 1.2.

This holds off on the addition of all lighting specular terms until
after the texture environment.

Cheers,Angus.

Daniel Ludwig wrote:
> 
> Hi,
> 
> I'm currently using OpenGL for rasterization only, doing my
> own transformations, lighting & clipping calculations. Now
> to my question: is it possible to set up OpenGL to compute
> the resulting frame buffer color using this formula:
> 
> color = texture RGB * iterated RGB + iterated Alpha
> (using iterated Alpha as monochrome specular component)
> 
> I've done this already with Glide, and AFAIK it's also possible
> with Direct3D, but is it possible _without_ using OpenGL's
> internal lighting pipeline?
> 
> I think I could "emulate" this equation using alpha blending
> and multi-pass rendering, but this would cost performance.
> 
> Thanks,
> Daniel

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