Graphics

[emanuevil81]

Maybe my question is dumb, but i want to know if it is possible to manage the common code of the various shaders i made.

Example: I would like to make a function that operates based on the distance, another that operates based on vertex color, another based on pixel color etc, and then making shaders that call one or more of them for a single drawing operation. 

Is it possible? 

[MartinCaine]

It's 'possible' but your functions need to be contained within the same file as your vertex or fragment shader functions. You'll have to copy the functions between shader files if you want to use them in multiple shaders. Almost all shader systems work this way.

[emanuevil81]

So in any case i have to copy the code.

Thanks  

EDIT:

could you please tell me how to do and use functions in shaders? Thanks again

[MartinCaine]

You use functions just the same way as you do in C/C#:

float4 DoSomething( float4 colour )
{
    return float4(colour.rgb * 0.5f,colour.a);
}

... (in main)

float4 colour = DoSomething( vertexColour );

[AlexMcDev]

Hi:

You can use #include directive and make sure that file it's no build action =). I Used it and works.

Cheers

[MartinCaine]

Ha, cool. I didn't even know you could use #include in shaders and I've written bloody hundreds over the last few years :-p

[AlexMcDev]

Hi:

Great =D.

Cheers,

[emanuevil81]

Thanks to you all!

[AlexMcDev]

=D.

[emanuevil81]

I tried making functions in a shader and then including the file in another shader, if in the included shader there's the main i get an error saying that there's already a main, if not i get an error saying that the shader needs a main...

What's the correct way?