Psuedo-3D representation of a surface of a 2-Dimensional function.
I recoded the program in Javascript (using HTML 5 Canvas), GPL (a Professor developed language at Chico State Unversity), SiMPLE (a C-interpreted language developed by Bob Bishop, a former Apple-II developer), and Android for Mobile.
The Javascript version uses a logarithmic curve while GPL implements a tapering cosine.
Javascript link: https://cdn.rawgit.com/AlexElson/Eruption_Function/master/JsEruption.html