This is not really a self-promotion, but rather ‘where else’ to add a link to a usefull library for opengl-newbees or relaxed professionals that needs a quick-fix of splitting a polygon of some extend and complexity into drawable fans and triangles. It’s not exactly opengl, but that’s where you use it.
I have added a class that makes it ‘easier’ to set up dynamic polygon editor … with you drawing what you click in of points. In this situation the library works locally in the tree of nodes that lies behind the polygon-splitting. This is the situation that makes great value to me. But. You may probably have to be persistant to set it up! I’ve tried to make it easier by adding snips of the relevant code I use.