how to load files saved as following formats into openGL application--need help!

OpenGL OpenGL: Basic Coding
1

how to import(load) “objects” into an OpenGL application that are saved in the following file format:
IGES(.igs),Neutral(.neu),STEP(.stp),STL(.stl),Inventor(.iv),
WaveFront(.obj),Render(.slp),VRML(.wrl),ACIS File(.sat),
Assembly(.asm).
Could you give me some examples or source codes ,or give me some clue about that?I need them in a hurry.Thank you very much! Please help me!

2

opengl doesn’t deal with files, it just renders polygons. You need to look up the file format (try wotsit.org) and then read in the vertices using file I/O. Then render those vertices.