http://xuanji.appspot.com/static/wikipedia.html
Note that the "sinusoidal wave" link isn't working, as it redirects to "sine wave"...gotta work around that :(
If you want to read/modify the code send a pull request to github.com/zodiac/xuanji.appspot.com/, the commit which implemented this is https://github.com/zodiac/xuanji.appspot.com/commit/872b40dc...
Http://i.imgur.com/9lSpyxb.png
Http://i.imgur.com/9lSpyxb.png