ddd is a set of widgets and tools to display 3d meshes in a kivy program. It can load simple .obj+mtl files on its own, but deffer to the assimp lib to do the heavy work of loading numerous formats and fixing the common errors in their formats, saving a lot of pain.
The module also provides a simple multitouch navigation system, as a separate class (MultitouchCamera), demonstrated in the example.
You need to have at least assimp 3.1.1 to use this loader.
you need to make python/kivy aware of the lib presence. on windows, you can edit the portable package to add the port/PyAssimp dir to PYTHONPATH, and the bin32 dir to PATH, so both the lib and the dll are found.
on linux, you can add the port/PyAssimp dir to PYTHONPATH as usual, pyassimp will look in /usr/lib and /usr/local/lib for the .so file, or you can patch pyassimp/helper.py to add your own path, adding LD_LIBRARY_PATH support is a good idea, so you can export the lib path from the shell.
ddd/view.py can be run as a standalone example, loading .obj/.3ds files placed in the data/3d dir that accompies it. Textures of the mesh usually needs to be put in the same dir, or in a relative path refered to by the material file, tests using files from various places on the web indicates that textures filenames very often require manual fixing, especially on unix systems, pay attention to the filenames kivy is trying to load if you have missing textures.
File loading is currenctly not async, causing the interface to freeze for several seconds when loasing a big mesh file.
Rendering has visible issues, light modeling is based on Blinn-Phong model, but is not perfect, there are also issues with polygon borders in some cases, if someone finds the reason, that's most welcome :).