Looping wiggle() - Dan Ebberts's

Sometimes though, it would be extremely useful to be able to get the wiggle motion to loop. Here we'll take a look at a way to accomplish this by using a bit of clever math and taking advantage of one of wiggle()'s seldom used parameters.

After Effects 6
Useful things
Expressions

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Without question, wiggle() is an extremely handy and versatile tool for adding an element of randomness to a project.

freq = 1;
amp = 110;
loopTime = 3;
t = time % loopTime;
wiggle1 = wiggle(freq, amp, 1, 0.5, t);
wiggle2 = wiggle(freq, amp, 1, 0.5, t - loopTime);
linear(t, 0,  loopTime, wiggle1, wiggle2)

(Min. Version: After Effects 6, Category: Useful things, Type: Expressions)