GLQuake and opengl

[yoch]

So i had this old copy of quake and it installed fine on my modern machine with win7 x64. During installation, at the end it asked me if I had a 3dfx card to which i selected 'yes'. Now when i try to run glquake.exe it gives me an error saying glide2x.dll is missing from the system.
I thought glquake used opengl, so why does it need glide2x. Other classic games using opengl like hexen 2 and heretic 2 run fine on my system otherwise.

 

[Pinhedd]

So i had this old copy of quake and it installed fine on my modern machine with win7 x64. During installation, at the end it asked me if I had a 3dfx card to which i selected 'yes'. Now when i try to run glquake.exe it gives me an error saying glide2x.dll is missing from the system.
I thought glquake used opengl, so why does it need glide2x. Other classic games using opengl like hexen 2 and heretic 2 run fine on my system otherwise.

The OpenGL API and Glide API are different entities.

Technically speaking, OpenGL is a specification that has no reference implementation. Each OS vendor and hardware vendor is responsible for implementing it. Microsoft provides the OpenGL library for Windows, and AMD/NVidia/Intel provide the driver side support.

Glide is a [depreciated] derivative implementation of OpenGL from 3DFX (a company later acquired by NVidia) that is no longer in use. Modern operating systems and hardware vendors do not include support for it as 3DFX hardware is long dead and buried. Any games that still require Glide must use an API emulator.

If you want to run GLQuake, you must reinstall the program and select "no" when prompted with that question.