Hey!
So I've been trying to have a simple on/off switch in the GUI for Luma Sharpen. Trying to understand how it all works, but I've never seen stuff like "half4".
So I need some help...

Whenever there's a res=origcolor I can usually create an on and off switch by adding:


But I don't know how to make this in Luma Sharpen shader...
Tried this:

But the shader doens't load obviously... I'm still a noob at this so be gentle. ^^
Can it even be done with Luma Sharpen? If all else fails I'll use a #ifdef instead. But I'd rather have all in the GUI so...pls help!

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Hi, Insomnia
half is 16-bit float according to this http://msdn.microsoft.com/en-us/library/windows/desktop/bb509646(v=vs.85).aspx
I don't know if there are any constrains about half, but if the shader can work before your modification, it shouldn't be the problem.

Is there any error message?? Can you post the whole shader? I would love to look into this.

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#ifdef not work, it's static thing. Also much faster instead of if/else statement to use interpolation via lerp. More than that, you can't declare variable half4 done inside if/else statement, because it can't be used outside of it, it's basic coding rules. half, half2, half3, half4 replace with float, float2, 3, 4, because they are same internally, it's alsmost obsolette variable type (performance is a bit faster when used with certain instructions set, but you will not use them for sure).

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Hi, Insomnia!
You need to paste right after

only one line:

I've done the same thing with LumaSharpen code from ZeroKing's effect.txt and it works.

Do not use return at all! And in condition also. Shaders 3.0 do not allow this and this somehow works only because developers doing mistakes and microsoft updated shader compiler to support this.

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