Making pendulum stop at certain time?

[D***@adobeforums.com]

Try this:

veloc = 7;
amplitude = 80;
decay = 2.0;

t = (time - inPoint);
if (t < 0){ value }else{ amplitude*Math.sin(veloc*t)/Math.exp(decay*t) }

You can use the graph editor to see the effect of changing the parameters, so you can get it set up the way you want.

Dan

[N***@adobeforums.com]

Works beautifully Dan! Thank you!

I notice that the pendulum always starts at the rest position. Is there a way to start it at the highest point?

[D***@adobeforums.com]

Just change Math.sin() to Math.cos()

Dan

[N***@adobeforums.com]

Hey, it works! You're a genius as always!

[N***@adobeforums.com]

Cosine! Of course! Thank you!

How would you apply the inPoint to your Jack-in-the-Box expression?

veloc = effect("Velocity")("Slider");
amplitude = effect("amp")("Slider");
decay = effect("Decay")("Slider");
y = amplitude*Math.sin(veloc*time)/Math.exp(decay*time);
value + [0,y]

[D***@adobeforums.com]

Like this, probably (not tested):

veloc = effect("Velocity")("Slider");
amplitude = effect("amp")("Slider");
decay = effect("Decay")("Slider");
t = time - inPoint;
y = amplitude*Math.sin(veloc*t)/Math.exp(decay*t);
value + [0,y]