Paul Falstad did (and does) all the heavy lifting for this project, but the co-host of the JS version at lushprojects.com is my site and I did the original port from a Java applet to a GWT application that complies to JS.

Glad to know so many people find it useful. I always thought it was a great visualisation tool which I why I wanted to put the effort in to do the port.

Off to bed now, but if people have questions I'll take a look at the discussion again in the morning.