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cg shaders: enabled/disable blending?

Started by Daywalker313 Oct 28, 2005 at 5:13 AM 1 replies 700+ views

Original Post

Oct 28, 2005 at 5:13 AM

Hi there, I want to enabled/disable blending an the blend function with my cg shaders. The problem is, I usually have to change their states inside my code but how should my program know wheter a shader makes a material semi-translucent? I googled a bit and found the CgFX standard, but it seems like it's hard to implement and I'd like to continue with simple cg shaders. Is there any way how I could manage this or is it true that I have to know which shaders will require blending related stuff at compile-time?

zedzeek

Oct 28, 2005 at 2:27 PM

i havent used cg but i assume this is not possible cg + glsl dont deal with blending at all
if u want the shader to know if blending is enabled or not u can pass the info as a unifrom

Daywalker313

Oct 28, 2005 at 3:57 PM

Thanks for your reply but this is really bad now.
I could define some keyword that I add as a comment to the shaders and parse the shader file manually to find out wheter the shader requires blending enabled etc.
But it's not clean in any way.
Does someone know how professional games that are using cg/glsl/hlsl shaders handle this issue?

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