AMD Catalyst driver errors -- tessellation

A thread in the Advanced OpenGL forum discusses two different errors in the AMD Catalyst driver version 10.11:

Further discussion of this issue belongs here in this forum.

To summarize:

Something I meant to mention but left out of my last post in the thread in the advanced forum is that I haven’t had any problem with my tessellation shaders for quads previously, but I have always defined each gl_TessLevelOuter[] element using an index variable, such as edge_ndx, like this:

int  edge_ndx;

for (edge_ndx = 0;   edge_ndx < 4;   edge_ndx++) {
//do determine curvature and length of each patch edge...
  gl_TessLevelOuter[edge_ndx] = ????;

could you send your test cases to me? I’m employer of AMD, and I can’t reproduce these issue with your describe. My email is

I’ve sent you a test case for quad tessellation.

I’ve sent you a test case demonstrating that the vertex spacing qualifier of tessellation evaluation shaders is ignored when the primitive mode qualifier of tessellation evaluation shaders is isolines.

This topic was automatically closed 183 days after the last reply. New replies are no longer allowed.