what exactly does eselect opengl do...

[dasPaul]

Hi there
I need to know what (file changes?) exactly does a "eselect opengl xorg/nvidia" do. How to find out?

[eyoung100]

Think of OpenGL as the free version of DirectX. Setting the OpenGL library determines what kernel module does the heavy lifting in rendering. By heavy Lifting, I mean 3d Acceleration, optimization etc
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[Ant P.]

It sets a bunch of symlinks and copies files to the correct place. This includes header files for compiling as well as libraries in /usr/lib.

The code is in /usr/share/eselect/modules/opengl.eselect

Things it does not affect:

• Anything to do with the kernel or kernel modules (the above post is completely wrong)
  
• Anything involving /etc/X11/ files

[dasPaul]

Thank you very much. I will investigate further into opengl.eselect