From the course: After Effects Scripts & Tips: 1 Animation Techniques

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Linking animated properties with expression pickwhip

Linking animated properties with expression pickwhip - After Effects Tutorial

From the course: After Effects Scripts & Tips: 1 Animation Techniques

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Linking animated properties with expression pickwhip

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- [Instructor] Many people are familiar with parenting, where we attach one layer to another, so their transform controls are connected. But, let's say I want to link a value like rotation, but nothing else at all. No position, scale, nothing, just rotation. To do this we can basically do a little secret parenting in the way of The Expression Pickwhip, and that's exactly what I'll be doing to attach the rotation of my crank up here, to the rotation of my gears below. Now, I'm in Chapter Three, Zero Two Expression Pickwhip. And, if I preview, you'll see that I've got this crank, right up top, with just two rotation key frames, cranking around in a loop, going over and over. Now, normally I would like to use parenting to attach things, so I would do something like take this Middle Gear, which is the one right behind it, and link it to the crank. So when I do this, this actually looks good, this actually works. And, that's because the anchor point, in the middle of the crank right here…

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