Including shader functions inside shader

#1

I have a noise shader function that I’d like to include in my main vertex and fragment shader. I learnt that glsl doesnt have a file system comprehension, meaning i have to handle the includes externally and load all the shaders. In my main.h I have declared

   ofShader shader;
   ofShader noise;

and in my main.cpp I have loaded them as such

	noise.load("shaders/noise/noise.glsl");
	shader.load("shaders/SimplexTerrain/shader");

shouldnt that be enough to include the noise functions in my shader ?
I have tried adding the GLB_ARB directive this way in my main shader, but couldn’t any explicit examples online,

#extension GL_ARB_shading_language_include : require
#include noise

my noise shader and main shaders both start with #version 150

If you have any examples I could understand with, thanks a lot !

#2

Hi @kaspar.wtf,

I use :

#version 120
#pragma include "../../../pathToMyGlslFileFromDataFolder/nameFile.glsl"

you can see it here in action - work in progress though -.
and it works fine, no separate inclusion from the ofApp.h.

++

P

#3

shit, I’ve unsuccesfully tried every combination of this
do you know of any way to include it in the buffer from the of load function ?
that may be easier since of seems to be able to load the base one.

thanks anyhow !

#4

I have not seen it done through an import in the instance of an ofApp.cpp, but maybe it’s possible. In any cases, you are trying to load a shader, but passing a .glsl file as an argument, and that’s not what the shader is expecting - need a .vert + .frag -.

judging by your app structure, you could try this in your shader.frag :

#pragma include "./shaders/noise/noise.glsl"

I have just tested it on my machine, with a noise.glsl file looking like this :

vec3 computeNoise(){
return vec3(1., 0., 0.);
}

and calling the function the vector.frag works fine.
I’m using Mac OS, with OF.0.11.0 .

Hope you find a way,

Best,

P

1 Like
#5

Are you getting any errors? @pierre_tardif00’s solution should work fine.

Do make sure your GLSL version preprocessor corresponds to the version of OpenGL you’re running (you can set this in main.cpp). These can be verified here: http://en.wikipedia.org/wiki/OpenGL_Shading_Language

1 Like
#6

It works ! the problem was that I had redeclared the version inside of noise.glsl
thanks a lot ! :slight_smile: