read object from .mesh or .obj file

[xxh12321]

I am here to ask how to create btTriangleMesh by a .mesh or .obj file because I don't know the structure of these binary file.
Any help will be highly appreciated.

[kloplop321]

If you want to support many different formats, take a look at assimp. It has an easy interface for what you need.

[freemancw]

Just another option: I believe that the Autodesk FBX SDK can import .obj files, and it is very easy to work with once you get over an initial learning curve.