Hey guys, I'm hoping someone here has experience with this:

I recently got a new computer. I've moved over all my code, and when I try to run, my shaders fail to link. They work on my previous computer. I've installed the latest nVidia drivers, and I successfully create my shader context. But It says that I'm not writing to gl_Position when I know I am.

Any ideas?

Probably some small error in your code that your old driver was tolerating, but your new driver is being strict about

Post the code and errors?

The error I got was

uniform mat4	g_mWorldViewProjection;


attribute vec3	Input_Position;
attribute vec4	Input_Color0;

varying vec4	IO_Color0;

void M44xV3(mat4 Matrix_In, vec3 Vector_In, out vec4 Result)
{
        Result=(Matrix_In * vec4(Vector_In, 1.0));
}

void main()
{
	vec4 M44xV3_4_Result;
	M44xV3(g_mWorldViewProjection, Input_Position, M44xV3_4_Result);
					
					
	gl_Position = M44xV3_4_Result;
	IO_Color0 = Input_Color0;
}

Interesting, now it's saying it can't find void main()... I'm looking at the string of code I send it, and it definitely is there...

I think I solved it, for some reason glShaderSource wasn't accepting the '0' length for the shader code. According to the spec that means that the array will be NULL terminated, and that it would use the length of the string as the code length. But if I just use a simple strlen on the code and pass that size it works... That's a bit worrying.

Now I get to figure out why nothing is drawing anymore, and why there are no errors because of it! Yipee!

Huh that's interesting. I was previously using zero as my length and it was working.

I suppose either way one driver or another was messing it up.