Are there any ready-to-use libraries graph drawing libraries (i.e. edges and vertices, directed graphs, etc.) for Processing? I'm making teaching materials for a class, and although Processing is supposed to have really good data visualization, I can't seem to find any code for it.

 

The class is basically a computer science approach to basic graph theory, and what I'd really like is have the students simply add a library to their sketch, set up their graph's adjacency matrix, and then have that graph display.

 

Does something like this exist yet? Would I have to write it/port something myself?