Shader definition issue or me not understanding ?

[ustk]

It seems increment returns back to 0.0 at each iteration, hence not incrementing...

Is this a normal behaviour? (entire code executed in loop or only main())
Is there a way to watch a variable in a shader?

float increment = 0.0;

void main()
{
    increment += 0.1; // Does not seem to increment (at least more than once)
}

[ustk]

I have just tested online and effectively it does not increment...
The thing is that I want to increment a variable but not rely on iTime for other reasons.

EDIT: well I think I will just use a uniform in the end and increment from Hise script...

[Christoph Hart]

@ustk the main function of a fragment shader is stateless because it will be executed simultaneously for every pixel on the GPU which is an absurd fact to wrap your head around at the beginning.