algorithmic modeling for Rhino
This is a UserObject that generates a 'kind of' Voronoi diagram with right angles.
Drop it into your UserObjects folder (File> Special Folders> UserObjects...) and it should appear alongside the standard Voronoi component once you restart Grasshopper.
Remember... If it's not a right angle, it's a wrong angle.
(note: this blog post replaces a previous discussion post on this user object).