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Position null to Scale Y only, fishing hook

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Hunter Hempen
Position null to Scale Y only, fishing hook
on Nov 13, 2019 at 3:48:30 pm

Here's the set up - I have a fishing hook on the end of a spiraling line that coils. Ideally, I'd have the line bounce down by animating the Y scale only on a null at the top of the line, to kind of squish the fishing line coils and give that illusion, but have the hook remain the same scale on the other end of the line as it jiggles around via manual keyframing on rotation.

I have tried this one from you, Dan, on the scale for the hook:

value*(100/thisComp.layer("Hook Null").scale[0])

But the issue seems to be it obviously only works if all three scale directions are linked. I tried switching the [0] to [0,0,0] but the hook still scales down. I am simply ignorant on the expression lingo. However I'm wondering if I need an extra null attached at the end of the line maybe? So visualize this:

Null Line Top
---
Coiled Line
---
Null Line Bottom
---
Hook

Not sure if that's necessary but I think the expression from earlier is the answer just need to format it correctly.

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