Extension Refernce Functions

Hi… I’m totally new to opengl extensions and I am having a hard time finding a reference for the syntax. I know how to declare them and call them once i have them. I am also aware of how to check if they are supported.

But for example… the function below seems strait forward to me at first.

I want to be able to get the pointer to my buffer so I can use an offset one vertex data is loaded to the card…

I would have though it needed 2 parameters but it takes three. And I’m uncertain on where to find the reference. Does one exist?

The extension specifications are listed at http://oss.sgi.com/projects/ogl-sample/registry/

Most of them also contain sample code.

#define BUFFER_OFFSET(i) ((char *)NULL + (i))


Thanks -NiCo-,

With your link and example i was able to easily understand how to use exstensions in general. Again thanks…