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[kamac]

Gosh, gosh, gosh.

30 minutes spent, trying to find out what's causing that issue.
Namely, I want to bind a uniform value to my program id. Here's how I do it:

Code:

const char *name = "mytexture";
GLint uniform_myTexture = glGetUniformLocation(program_id,name);
if(uniform_myTexture == -1)
{
printf("ERROR: Could not bind uniform %s to program %s\n",name,program_name);
return;
}

Here are my shaders that I compile:

(vertex shader)

Code:

#version 120

attribute vec3 coord3d;
uniform mat4 MVP;
attribute vec2 UV;
varying vec2 UV_coord;

void main()
{
gl_Position = MVP * vec4(coord3d,1);
UV_coord = UV;
}

(fragment shader)

Code:

#version 120

uniform sampler2D mytexture;
uniform vec4 color;

varying vec2 UV_coord;

void main()
{
gl_FragColor = texture2D(mytexture,UV_coord) * color;
gl_FragColor = vec4(1.0,1.0,1.0,1.0);
}

Everything bind succefully but not

uniform sampler2D mytexture;
uniform vec4 color;

which are inside my fragment shader... Those that are inside vertex shader bind correctly.
I remember that I've had this issue earlier, but I don't remember the solution  

Do you guys know it?

[owendeery]

Is the uniform location that you get invalid? Or does it just not bind to that location properly?

I assume that you're checking shader compilation errors as well, since both binding problems are occurring in the same shader file.

[kamac]

All I check is
A) If shaders compiled succefully
B) If uniform_myTexture == -1, if yes, print the error that binding was unsuccesfull.

[Christian Knudsen]

Does glGetError return anything useful?

[kamac]

It seems it returns nothing. (Aka. nothing matches it)

[Liosan]

Everything bind succefully but not

uniform sampler2D mytexture;
uniform vec4 color;

which are inside my fragment shader... Those that are inside vertex shader bind correctly.

Effectievely your shader doesn't need them:

Code:

gl_FragColor = vec4(1.0,1.0,1.0,1.0);

So the GLSL compiler optimised it out; they don't exist anymore it the resulting compiled code. No wonder they can't be found.

Liosan

[kamac]

Eeeew you're right Liosan. What GLSL compiler does sucks 
I guess I will need to learn more about it