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Computer Graphics Lab of NIT Rourkela.

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What is OpenGL

OpenGL is a low-level graphics library specification. It makes available to the programmer a small set of geomteric primitives - points, lines, polygons, images, and bitmaps. OpenGL provides a set of commands that allow the specification of geometric objects in two or three dimensions, using the provided primatives, together with commands that control how these objects are rendered (drawn).

It contains three basic libararies:

1. Core OpenGL
2. OpenGL Utility Library (GLU) contains several routines that use lower-level OpenGL commands to perform such tasks as setting up matracies for specific viewing orientations and projections and rendering surfaces.
3. OpenGL Utility Toolkit (GLUT) is a window-system-independent toolkit, written by Mark Kilgard, to hide the complexities of differing window APIs.