On Fri, 2011-08-12 at 00:56 +0200, Peter Zijlstra wrote: > > s - x 3 > f(x) := 1 + (-----) > d > btw, if you want steeper slopes for rampup and brake you can add another factor like:
s - x 3 f(x) := 1 + a(-----) d
And solve the whole f(l)=0 thing again to determine d in l and a.