Its pretty incomplete since I just started working on it last week but already we used it in our game workflow. I'm not so interested with writing collada XML right now, mostly just reading it. You could use this to write out mesh data in whatever format you wanted actually. The ruby collada gem is a separate project and designed to assist with reading data from collada files. You can see the current state of the C++11 implementation here: TaggedFormat was designed to be really the most basic thing I could think of that would meet our needs, structured into something that might be useful for future projects too. However we are going to need some bone based animations so I'm not completely sure how that is going to work but I suspect I'll try to look at the easiest way to implement vertex skeleton animation in OpenGL and map that directly to the binary file format. Most of our models are static, or have animation coded directly in the game engine. At some level, you can extract triangles out of collada from most platforms but it does sometimes require a bit of hand manipulation. Communication between those programs is difficult at best but Collada sort of works. Our 3D modeller is using XSI and our artist uses Blender.
I wanted to learn more about C++11, along with unit testing C++ code, and I'm developing a game with a bunch of friends and so we needed something that fits with our workflow. TBH the whole thing is a bit of an experiment.
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