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Ramp up and down
just curious if anyone had an expression that could take a single value like Opacity and Ramp up from 0 to 100 and back down again but more slowly. A Variable in frames to Ramp up and a Variable in frames to Ramp down. All triggered by a Layer Marker?
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3 Replies
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Im using this now, but this is based on the Layer’s inPoint. I’d like to be able to trigger via a Marker a FadeIn Value to 100 (with say a 15 frame FadeIn) and then Fall Off with a 50 frame FadeOut. Thanks 🙂
FadeOut = 50;
tSecs = FadeOut / ( 1 / thisComp.frameDuration);a = linear(time, inPoint, inPoint + tSecs, 100, 0)
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Something like this, I think:
fadeIn = 15;
fadeOut = 50;if (marker.numKeys > 0){
f = thisComp.frameDuration;
t = time – marker.key(1).time;
t1 = fadeIn*f;
t2 = fadeOut*f;
Math.min(linear(t,0,t1,0,100),linear(t,t1,t2,100,0))
}else{
value
}Dan
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brilliant 😉
Happy New Year Dan..
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