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Expression help
I need an expression that cuts between the layers of a comp for a fixed period of time. Very simular to motionscript’s random stills example, however without the random(ness). It seems like an easy thing to tweek. I’m not good with expressions, I have a tiny brain…and now it hurts. Thanks.
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2 Replies
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Your first step is to create a null called “Controller”. Add an expression control slider to it and name that slider “curr layer”. Add the following expression to that slider:
duration = .5; //length of each cut in seconds
numLayers = 4;//Number of layers you want to switch between
//These layers must be the uppermost layers in the comp
(Math.floor(time/duration) + 1 ) % numLayers + 1Modify the duration and numlayers variables as necessary. Next, add the following expression to the opacity property of the layers you would like to switch between:
v = thisComp.layer(“Controller”).effect(“curr layer”)(“Slider”);
if(index == v)
100
else
0Well, that should do it.
~Colin Braley
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Thanks man.
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