> The current vertex is a globally set variable (as you'll notice once you try to set textures and colors, becayse glVertex3f just sets a global variable), etc.

> The current vertex is a globally set variable (as you'll notice once you try to set textures and colors, becayse glVertex3f just sets a global variable), etc. Bad example. glVertex3f is the one function (among the various glColor, glMultiTexCoord etc.) which doesn't set global state. It actually triggers a vertex to be sent (which takes its attributes from the global state you mentioned). But all this is pretty moot, because it's not how OpenGL has been meant to be used in ages. Use the core profile, where these functions don't even exist any more. > You allocate a buffer, fine. > But to write to it, you first bind the buffer to a global variable, then use a call writing to a global variable. Also outdated, though not by quite as much. Direct state access (DSA) has been a thing for a pretty long time, now.