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frame by frame on off flicker expression error
Hiya,
I’m witnessing some weird behavior with a simple expression:
I have a layer and want to set its opacity to alternate between 0 and 100, the expression I added to the opacity property is :[((time*100/4)%2)*100];
This works for a few seconds, but then all of a sudden the results go haywire…the modulo basically tells me whether the frame is even or odd, but all of a sudden I get nrs. like 1.4210854715202e-14, etc.
Any tips welcome…
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3 Replies
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Not sure what your expression does, but will this do what you want?
(timeToFrames(time)%2)*100
Dan
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Yes. I does exactly what I want 🙂
My expression took the float of time (0.04, 0.08, 0.12,..)
multiplied it by 100 to get an int, and divided it by 4 to get an by 1 increasing nr. per frame.
Basically the same, but still weird that the 110%2 returns 1.42…e-14
Thanks for the tip. -
Ah, OK. The time is stored as a floating point value and there’s nothing in your expression that expressly converts the result to an integer (multiplying by 100 just converts it to a larger floating point value) so what you’re seeing is a small error resulting from not being able to represent fractional values exactly.
Dan
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