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Wiggle From Leader

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These two expressions create a “ follow the leader” effect. One works from the top down, the
other from the bottom up. Only use one.
After Effects 7
Useful things
Expressions

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A follower will tag along after the leader, deviating from the path according to the wiggle properties that are specified in the inputs. Once applied
to a single follower, you can duplicate the layer as many times as you like and each subsequent
copy will follow along, offset in time from the last and wiggling uniquely. In this expression,
the wiggle is based on the position of the leader.
Link Expression control sliders to lag (to interactively control how bunched together the layers
are), wigfreq (to control the frequency of the wiggle) and wigamp (to control the amplitude of
the wiggle). Apply Expression control effects to the leader only.
Change the word “Leader” to match the name of the leading layer.
by Michael Natkin & Brian Maffitt
//USE THIS ONE IF THE LAYERS STACK UP FROM BOTTOM LEADER
lagtime = .1;
wigfreq = 3; //wiggle frequency
wigamt = 30; //wiggle amount
adj = (this_comp.num_layers - index) * lagtime;
this_comp.layer("Leader").wiggle(wigfreq, wigamt, 2, .5,time - adj)
//OR...
//USE THIS ONE IF THE LAYERS STACK DOWN FROM TOP LEADER
lagtime = .1;
wigfreq = 3; //wiggle frequency
wigamt = 30; //wiggle amount
adj = (index - 1) * lagtime;
this_comp.layer("Leader").wiggle(wigfreq, wigamt, 2, .5,time - adj)



(Min. Version: After Effects 7, Category: Useful things, Type: Expressions)
posted by MaxX on Dec 11, 2008

 

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