about OpneGL

1.why people using OpenGL instead of DirectX?? is it faster?

2.i tried OpenGL for B3D... just wanna try though - i opened file call teapot,n i found that there was no loading command line for the 3D mesh? how come? how u call the mesh then? or maybe the object isnt 3D at the first place??

get my point there??... please, i just no nothing about OpenGL

DirectX has cought up to OpenGL nowadays but the main difference is/was is that DX (Created by Microsoft) and OpenGL (OpenSource MultiPlatForm). DX Still isn't multiplatform and probably never will be.....