What is OpenGL?

What is OpenGL?

A software interface to graphics hardware.

Wiki: Open Graphics Library (OpenGL) is a cross-language, cross-platform application programming interface (API) for rendering 2D and 3D vector graphics. The API is typically used to interact with a graphics processing unit (GPU), to achieve hardware-accelerated rendering.

What is OpenGL used for?


Creating 3D moving images in order to make virtual environments, games, movies, etc.

How many commands are there in OpenGL?


About 150 distinct commands that you use to specify the objects and operations needed to produce interactive 3D applications.

Why are there no commands for performing Windowing Tasks or obtaining user input included in OpenGL?


Because OpenGL is designed as a streamlined, hardware-independent interface to be implemented on many different hardware platforms.


What are Geometric Primitives in OpenGL?


Points, Lines, and Polygons

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