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Gravity by Marker

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Simulating gravity turning on by a marker.
After Effects CS3
Useful things

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Imagine objects floating in zero-g, all the sudden gravity is introduced and the objects fall off the screen.
Just put a layer marker wherever you want it to start falling.
//applyTo: position
g = 1000; // gravitational constant
if (marker.numKeys > 0 && time > marker.key(1).time){
t = time - marker.key(1).time;
y = g*t*t/2;
value + [0,y]
Expression by Dan Ebberts


Falling, Markers, Gravity, zero-g

(Min. Version: After Effects CS3, Category: Useful things, Type: Expressions)
posted by MadDocc on Dec 04, 2010


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Expressions triggered by a marker

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Views: 9651
posted by MicGyver on Feb 15, 2009



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