So my question is: I understand nothing about openGl api, that's super confuse to me, Where do I start?
I did get that I need to append a callback to a draw handler and remove it to enable/disable my drawing funcion by seeing examples.
But how I use Bgl library, it's a wrapper to openGL? Its a blender's? implementation of openGL?
How do I read the open GL docs?
And most important: How do I convert from screen to 3D space and vice versa?