View Full Version : gl to uniform parameter binding semantics

01-28-2004, 10:56 AM
The cg language spec says, talking about position invariance...

MVP is a uniform variable (or structure element) of type float4x4 with an input binding semantic that causes it to track the fixed-function modelview-projection matrix.(The name of this binding semantic is currently profile-specific—for OpenGL profiles, the semantic _GL_MVP is recommended).

The arbvp1 profile provides the "glstate" variable that lets me access gl state from the vertex program, per the ARB_vertex_program extension.

In the vp30 profile I think I can make a uniform parameter like this..
uniform float4x4 mvp : _GL_MVP
to bind the gl state to the uniform parameter. Is this right?

How do I bind to other gl states? Where are the binding semantics defined for each profile? I'm hoping _GL_MVP is not the only state available in the vp30 profile.

I hope I just can't find the documentation.


Tom Nuydens
01-28-2004, 10:26 PM
Cg questions are better asked at www.cgshaders.org. (http://www.cgshaders.org.) I'll move this thread to the shading language forum though, where someone might be able to answer your question.

-- Tom