OpenGL is a set of more than 250 basic rendering functions that allow to build complex 3D scenes from rudimentary geometric figures. OpenGL is the main tool used in displaying graphics in computer games.
OpenGL is a system similar to Direct3D - a part of DirectX package. Elements of OpenGL package are applied in the majority of video games, both two- and threedimensional, as well as in animated screensavers. These features are also used by the programs that display the results of scientific researches, CAD, and virtual reality; therefore it is crucial for your computer to have these packages installed.