I cleaned up the program that made the pretty pictures, and now it is on SourceForge.
The SourceForge CVS browser still seems slow to update. You can use anonymous CVS to checkout the sources. The password is "anonymous". Enter that after using cvs login.
cvs -d:pserver:firstname.lastname@example.org:/cvsroot/brian-d-foy login
cvs -z3 -d:pserver:email@example.com:/cvsroot/brian-d-foy co text_density
The code is real crap, so do not use it in air traffic control, nuclear power plant operations, or medical devices. It should be fine for Microsoft level security applications, though (most things are, apparently).