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I am trying to figure out how to import .obj files generated using Blender into my Pyglet game. There is an importer object, example code, and an example .obj/.mtl file within Pyglet's contrib directory.

The pyglet contrib version works (and is flickery; comment out w.flip) with the pyglet/contrib .obj/.mtl files. When I try to run it with my .obj and .mtl files I get a blank screen.

Why am I seeing a blank screen instead of my Blender-generated object?

FWIW, here's my test repo.

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    \$\begingroup\$ "Debug my code for me" questions are really too localised for this site. Your best bet is to teach yourself to use a debugger, and trace through your program's execution yourself to work out what's going wrong. \$\endgroup\$
    – Trevor Powell
    Commented Jan 6, 2013 at 5:33

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There were no normals, so nothing was displaying. I updated the git repo to warn on missing normals.

Unfortunately, I have no ground-breaking debugging techniques to report. I opened up the working .obj file and the "broken" .obj file, and by comparing them I noticed that one of the files had normals, and the other one didn't.

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