what is DirectX & Open GL

Direct3D and OpenGL are competing application programming interfaces (APIs)
which can be used in applications to render 2D and 3D computer graphics.
Hardware acceleration of this process has been commonplace.


Comparison

Outside of a few minor functional differences which
have mostly been addressed over the years, the two APIs provide nearly the same level
of function. Hardware and software makers generally respond rapidly to changes in DirectX, e.g.
pixel processor and shader requirements.
In OpenGL are usually implemented first by vendors and then retroactively applied to the standard.




*Direct3D is a proprietary API that provides functions to render three-dimensional graphics,
and uses hardware acceleration if it is available on the graphics card.It was designed by Microsoft Corporation for use
on the Windows platform. It can also be used on other operating systems through special software such as Wine,
although the subset of features provided is not as complete as the reference implementation.

*OpenGL is an open standard API that provides a number of functions to render 2D and 3D graphics, and is available
on most modern operating systems including but not limited to Windows, Mac OS X and Linux.