typedef int PK_FIN_type_t;
This datatype contains classification data for a fin.
Value can be one of:
PK_FIN_type_wire_c The fin's owning edge has another fin
in the same face, and both fins are in the
same loop.
PK_FIN_type_biwire_c The fin's owning edge has another fin
in the same face, but the two fins are in
different loops.
PK_FIN_type_normal_c The fin's owning edge has no other fin
in the same face.