After some arduous coding this afternoon and evening, I was able to get started on the materials section of the code. I was also able to finish writing the implementation of the general polygon conversion case (the triangulate method doesn't work still, but the code is in place for when it does work correctly).
I added a method to csTriangleMesh called AddTriangleMesh(const csTriangleMesh&), which merges an existing triangle mesh with the current one. Essentially, what it does is add all of the vertices of the parameter mesh, as well as all of the triangles to the current csTriangleMesh. This was necessary for the polygon implementation, as I had a bunch of csTriangleMeshes floating around, and I wanted exactly one of them. I figured this fit best inside the csTriangleMesh class itself, although this is open for debate. Also open for debate is whether the name of the function should be something more descriptive, such as "MergeInto()" or the like.
I haven't made a commit today, because there are still things that I want to test before committing it to the branch. (e.g. I haven't fully tested the AddTriangleMesh() function yet, and I don't want to commit without knowing it works 100%).
Finally, I want to state that I have been placing warning messages into the code for items in the collada convertor which aren't implemented yet. (e.g. the general polygon case, as well as polygons with holes, triangle strips, and triangle fans). It will now warn a user if a case is encountered that isn't fully implemented yet. Also, I'm not sure how to handle the <lines> element, because as we have moved fully to triangles, how are lines displayed in CS?
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