setting attribute value

[Beau]

Hi,

I'm building an anisotropic shader so I need to set the tangent and binormal vector for each vertex but when I set the binormal like this:



GLint BLoc = glGetAttribLocation(*sp,"B");
glVertexAttrib3f(BLoc, b.x,b.y,b.z);
I get glitches, even when I don't use the attribute value in my shader at all.

What could be wrong?

Thanks,
Beau

[k_szczech]

"glitches" - sorry, I don't know this word. I'll just assume you have performance issues.
You should use glGetAttribLocation only once, after you link your shader. Locations don't change unless you re-link shader.

[Beau]

I figured it out...shouldn't call glGetAttributeLocation within glBegin