What is OpenGL

• OpenGL is not a software, nor a library of code
• => It is an API = set of functions signatures and types (expressed in C language).
• • - Implementation may depends on your Graphics Card/driver, OS.
  • - OpenGL functions may lead to GPU hardware implementation, or can be emulated by software

• OpenGL focuss primarily on drawing Graphics

• • - It doesn't handle GUI (buttons, sliders, etc)
  • - It doesn't handle user events and other hardware (mouse, keyboard, sound, etc)
  • - It doesn't handle window in which your draw
  • - It doesn't provide high level 3D scene components (camera, lights, primitives, transformations, etc)