-
Deriving one position keyframe’s value from another
Hello AE expression community.
Boy, I hope someone can help me with this, because I can’t find the answer to this anywhere. At any rate, here’s what I’m trying to do – I have a layer with various position keyframes throughout. One of those keyframes, however, needs to derive its value from the preceding keyframe. In other words, I need to be able to edit the position value of, lets call it keyframe 3, and have that automatically become the value of keyframe 4.
Does ANYONE out there know of a way? Please, please, please – I’m up against a serious wall.
I really appreciate all help. Thanks guys -
2 Replies
-
What you’re asking is not straightforward or simple. If your keyframes are linear, it might look something like this:
if (time < key(3).time)
value
else if (time < key(4).time)
key(3).value
else if (time < key(5).time)
linear(time,key(4).time,key(5).time,key(3).value,key(5).value)
else
value
Otherwise (keyframes not linear) it gets more complicated in a hurry.
Dan
-
Hi Dan,
thank you so much for getting back to me. Luckily the keyframes were fine as linear, so that totally did the trick.PS – I’m a complete noob with expressions, but I’m trying like crazy to learn them. Your website has been absolutely invaluable, so having you answer my question here on CreativeCow is a real honor. You da man (as we used to say in the 90’s).
Thanks again
Reply to this Discussion! Login or Sign Up