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expression works unless key framed?
Hi
I have an expression that turns transparency full on or full off depending on how many degrees a control layer is rotated.It all works fine until I lay a keyframe on the control layer then the last visible layer is stuck on?
I can see the numbers change as the time line runs but the image remain constant?
baffled
if (comp("SceneSetup").layer("cntrl").transform.rotation ==1 ) 100 else 0 -
7 Replies
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This sounds like the situation that occurs when an expression is referencing a keyframed property in a different comp and the two comps are offset in time. Is that the case here? If so, you’ll have to compensate for that in your expression, probably by using valueAtTime().
Dan
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its happening on two comps one is time remapped so that makes sense, the other however is straight forward and in sync?
I’m not at work now but have been thinking could it be because my control objects are text layers?
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It shouldn’t matter that the control layers are text layers. The only other thing I can think of is that your keyframed rotation values might not be exactly 1, so you might be better off checking for a range of values near 1. Hard to say though without seeing it.
Dan
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Cheers Dan,
visually it was hitting whole numbers?
If I can’t work it out in the morning I might have to upload a setup.thanks again
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Dan as always you’re right.
now I’m back at work I can see both troublesome comps are in a time remapped comp!
I’m just reading up about valueAtTime() and then it should be full steam ahead.
many thanks
Jim
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Hi Dan or others,
I’ve read but can’t get it clear in my mind.
how can I use valueAtTime(or any other method) to get the below expression to work in a nested comp that is in a time remapped comp.
recap it works when i rotate manually but keyframes don’t work.
cheers
if(comp("SceneSetup").layer("control").transform.rotation==index) 100 else 0
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Hard to say without seeing it. Sorry.
Dan
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