From: Samuele Salis (
Date: Fri Jun 27 2014 - 13:29:14 CDT

Ok Josh,
thanks a lot for your reply.
On Jun 27, 2014 6:00 PM, "Josh Vermaas" <> wrote:

> Theoretically its something like 1/x. More precisely a new animation frame
> is drawn once the time since the last frame exceeds (1-n) * 0.5 seconds (at
> least that's how I read Animation.C). In practice this you won't get 1/x
> performance, since it takes a finite amount of time to render a frame. You
> notice this most acutely if the systems you work with vary a great deal in
> size. A simulation of 2 water molecules renders very quickly, so you can
> blaze through lots of frames very quickly. A multimillion atom simulation
> renders much more slowly, and the animation speed then makes absolutely no
> difference.
> -Josh Vermaas
> On 6/27/14, 5:38 AM, Samuele Salis wrote:
>> Hallo everyone!
>> I wonder which analytical function (if someone exists) is used in the
>> animate speed n function in text command.
>> I know the argument n of the function is a real between 0 and 1 and it
>> grows roughly exponentially as a function of n.
>> I was trying to fit the curve, but I didn't find the right analytical
>> function.
>> Does someone know the analytical function used in vmd to change the
>> speed using animate speed n?
>> Thanks,
>> Samuele