I'm needing some kind of line or line~ but using other equations, like quadratic or qubic.

I attach an image of Robert Penner's equations. These equations was made for ActionScript to use in Flash... but, they are under BSD license. I ported easeInQuad, easeOutQuad and easeInOutQuad equations to Python. Someone ported them to Rhino, too... Maybe they can be ported to Pd.

Here is the Tweening chapter of his book: http://www.robertpenner.com/easing/penner_chapter7_tweening.pdf (from his page)

... or maybe they are already done in Pd... are they?

http://www.pdpatchrepo.info/hurleur/tweenertransitioncheatsheet.gif

I made 3 equations: linear, inQuad and outQuad. For the moment I don't need any equation more... well, right now, I don't need any of them. But I wanted to ported some of them.

I add equation.js, that I found somewhere in my hard disk. They are ported to .js by Zeh Fernando, Nate Chatellier, for Tweener class. Inside it, there are all the equations.

Using ease-linear or ease-inquad or ease-outquad, as argument, you can add the time grain in miliseconds (as line). Default (no arguments): 10ms.

http://www.pdpatchrepo.info/hurleur/ease-lin-inquad-outquad.zip