For the Mathematicians.

[doc hawk]

Implicit functions are not, in general, directly plowable, as there is no general y(x) explicit function available.

You *could*use differentials and derivates to take small steps, if you’re careful and watch for points with multiple solutions (in the example function, when it crosses either axis)

I think the best you’re going to be able to do is find broad classes of functions that you can have solutions prepared to handle.

Either that, or a brute-forced grid drawing, in which you solve for all values of y for each value of x.  Even then, you’d need a way to connect them.