Mike Horvath <mik### [at] gmailcom> wrote:
> On 2/17/2019 7:27 AM, Tor Olav Kristensen wrote:
> > #macro MacroName(StartTime, EndTime)
> >
> >      #local R = (clock - StartTime)/(EndTime - StartTime);
> >      #local S = min(max(0, R), 1);
> >
> >      S
> >
> > #end // macro MacroName
>
> What do you think would be a good way to gradually speed up and then
> slow down the motions using this macro? I'm thinking it would require a
> sine wave (or some other bell curve), but am not sure how to apply it.

insert

#declare S = sin(S*Tau);
or
#declare S = abs(sin(S*Tau));

before the line
S

However you're running it.

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