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Expression Slider for Opacity of Multiple Layers
Hello Folks,
I’m trying to write an expression that will allow me to have 1 of several layers visible at a time, but still retain control over when each is visible.
I *think* I can do this with a each layer’s opacity mapped to a different numerical value on a slider, but am really stuck on how to do this. Is there a standard way? Am I going about this completely backwards?
Thanks a million for your thoughts.
Kay
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3 Replies
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Say you apply you slider to a Null that you name “control”. Then an opacity expression like this should do the trick:
visibleOne = thisComp.layer(“control”).effect(“Slider Control”)(“Slider”);
if (Math.floor(visibleOne) == index)100 else 0Dan
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That is brilliant! Exactly what I was looking for! Now I’m off to save loads of time…
Thanks Dan!
Kay
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Wow! Thank Dan!
Belarus, Minsk
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