for tetgen installation please refer to http://blog.csdn.net/seamanj/article/details/51002086
1. edit object and export as .obj file in maya
2. convert .obj to .off format in meshlab
3. open command prompt and change the current directory to the location where the tetgen.exe is located, and type the following command:
the general description of options is given, more details please consult http://wias-berlin.de/software/tetgen/1.5/doc/manual/manual005.html
4. As soon as getting the following generated files, equipped with tetview we can display the tetrahedron corresponding to the original obj.