Hi Brian,

re:
> Regarding curve self intersection, (crossover/ overlap), potential problems, options might include:
> Ignore it and hope for the best?
> Test for it and eliminate the point? Or eliminate the point?
> Test for it and work around somehow?
> Rely on user to select only "well behaved" curves?

I don't know enough about what result you're trying to get from your script to advise on this.

But if the goal is to have it work as an adjustable function curve, then it would probably make sense to expect that the curve should not be self intersecting and should have just one y position for every x value.

- Michael