Letraset Catalogue

Can anyone tell me the math behind the slide object, written as an equation? I'm sure I saw it somewhere in the forum, I can't find it now.

math-behind-slide-object

Oops, sorry. I thought I'd seen it somewhere.

[expr ((($f1)+($f2*$f3))/($f3+1))*($f1>=$f2) + ((($f1)+($f2*$f4))/($f4+1))*($f1

where the output is fed back to $f2, and $f3 and $f4 are the up and down arguments.

no idea if it is the same what the cycling external does?