Hi Burr, I guess probably the easiest approach is to use whatever programming language you're most comfortable with to do the math formulas you need and to emit a series of x,y,z points to a text file. Then you can use the ImportPointFile plug-in (http://kyticka.webzdarma.cz/3d/moi/#ImportPointFile) to read in those points as a curve, either as the control points of the curve or as points to interpolate through.

There is not any already set up method in MoI to make those particular kinds of curves.

- Michael