The Tuple is the basic navigation tool in our mesh data structure.
int8_t & local_orientation()
int8_t valid_index_from_tuple(const wmtk::Tuple &t) const
int8_t find_local_dart_action(const SimplexDart &sd, int8_t source, int8_t target)
int8_t find_local_dart_action(PrimitiveType pt, const Tuple &source, const Tuple &target)