learning to write shaders

Hi,

I want to learn to write shaders for Unity3D.
It is not clear to me if I need to learn HLSL or Cg? Cg seems more generic, but is not supported by nVidia anymore (isn't it?).
Is there some Unity reference that lists all variables and functions that can be used?
I know there is a thread to do documentation requests. But I see no indication where existing documentation can be found.

 

-you can write shaders using GLSL or Cg, although GLSL is usually not recommended.
-you can find a list of built-in methods and variables from unity here. There's also a list on the nvidia site of standart functions used on Cg here.

hope that helps you getting started

 

Yes that helps.
The nVidia Cg functions list is from 2003? Didn't nothing change since then? Isn't there an actual function list from Unity?

 

Im also interested in this stuff pls post some useful links

 

you should take a look at your "UnityCG.cginc" file, it details many helper functions and macros you can use

 

Also here : http://http.developer.nvidia.com/Cg/index_stdlib.html it's the same commands that @WhiteSkullDev posted, only with more examples and explanations.