Hello to all!
I’m starting in openGL, as already said in another topic.
I need to know to build environments in 2d or 3d is all developed based on coordinates or is there any framework to help construct more complex objects.
If so, can you show me some?
Thank you!

You can have a look at It has some primitives. There are also engines available (including open source ones). But these are on top of OpenGL. It really depends on the task you need to perform.