automata – Finite state machines, graphs and trees in METAPOST

The pack­age of­fers a col­lec­tion of macros for METAPOST to make eas­ier to draw fi­nite-state ma­chines, au­tomata, la­belled graphs, etc. The user de­fines nodes, which may be iso­lated or ar­ranged into ma­tri­ces or trees; edges con­nect pairs of nodes through ar­bi­trary paths. Pa­ram­e­ters, that spec­ify the shapes of nodes and the styles of edges, may be ad­justed.