This Ruby extension is a port of the CoffeeScript 2D intersection library of the same name written by Github user noonat. It's my first C-extension, so be gentle!
It's pretty much a 1:1 port (so far) so I'll just point you at his tutorial if you need usage instructions and (easily portable) example code. If it ever grows enough to require it, I'll add YARD docs and/or post stuff on the Wiki. Since noonat's latest commit was two years ago as I write this, I may eventually add the circle and plane (line?) tests he was preparing to add.
This extension is (currently) being developed on a 64-bit system running Windows 7 and Ruby 1.9.3 patch-level 374 from RubyInstaller. I would appreciate feedback and pull-requests from users of other systems and/or Ruby versions.