Thanks, yes, Acadia covered the basics.  I mostly wrote the program as a mesh viewer and to mirror meshes with - the defragmenting is really just a side-affect of the better method I use for writing out .obj files (specifically, in this case, Sorting by Materials).

I'm actually working on a 'Pro' version of the program that has some added functionality. It's specifically geared towards optimizing .obj files, removing duplicate or unused UVs, Normals and Verts, along with the Facet sorting found in STOMP (but again with some improvments) and allowing the decimal precision used (number of digits to the right of the decimal written) for the floating point values.

 

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