Parametric icon

Uses the two parametric equations

x = cos(a*t) - pow(cos(b*t),j)
y = sin(c*t) - pow(sin(d*t),k)

to construct 6-parameter icons extruded to 3D

This uses the code for graphing general functions from http://www.thingiverse.com/thing:1376715

The functions are included in https://en.wikipedia.org/wiki/Parametric_equation under 'Sophisticated equations' which shows some explorations of this parametric space for low j and k.

For the printed icons, the values are

a=5;b=3;c