Double Elliptic Seat 'Tension' !

[Antimac]

Hi,

I've been playing with a graph control I downloaded a while back from the SM forum and I'm having a hard time trying to adjust the curve tension.
I have, so far, managed to get it to start and finish at the top of the graph (creating a smile shape), but when I change the value of the relevant float-power(s) i get the slope/tension change I wanted, but only when you position the control far left or far right does it work properly.

I would like to be able to feed-in a float value from a knob to adjust the tension on each curve.

The code for the Double Elliptic Seat is on this page...http://www.flong.com/texts/code/shapers_circ/
I kinda get it, and thought I could suss it with trial and error, but it's beaten me.

Any help muchly appreciated, fsm attached

Cheers

[Antimac]

Well...after further searching on this forum I've found TheOm's Line editor and KG's Custom Curve maker, so many thanks to those contributors!! Amazing stuff!

Cheers.