[PyOpenGL-Users] Noob question - Color pick selection - Buffer creation

[Jorge <gus...@gm...>]

Hi.

I am really new to opengl. I am using pyqt tutorials and pyopengl to show
objects like they say here:
https://github.com/Werkov/PyQt4/blob/master/examples/opengl/hellogl.py

However I have been looking for a way to pick 3d objects. I have seen that
the way is creating an additional buffer that is not showed and select from
this buffer based on a color assigned to each object. This is the theory
however I can't manage to create or find a basic example.

In the example I am using it is using GL.glCallList(self.object) to
represent the object based on the list of instrucction programmed before. I
now that in the def paintGL(self): I must repaint the buffer and the color
pick selection buffer.

My question is:

Could you give me a clue how to create the secondary buffer?

Kind regards and sorry for this basic question.

Jorge