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Controlling clones of an object in multiple scaled precomps
I’m trying to build a rig that lets me control the position of clones of an object in two separate precomps. i.e. I want to have Character A pass an object to Character B, and it would make life easier to have that object exist in both [Character A precomp] and [Character B precomp], ultimately controlled by a rig in the master composition. (I could do this all by hand/keyframes but I’d much rather have the flexibility of doing it this way!)
Two enormous problems I’m running into – Precomp A is scaled at [104%, 104%] and Precomp B is scaled at [-99%. 99%] (flipped on the x axis), and Precomp’s A and B are both 2000×2000, while the master comp is 1080×1920. I’ve figured out how to make the object the same size across all compositions (and account for position offset-ing), but I don’t know how to account for that scaling when it comes to the position of the object inside each precomp.
I’ve attached a picture for reference. The well dressed horse needs to pass the box to the human lady. Clearly the fate of the world depends on an elegant solve.
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2 Replies
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Assume in your Master comp you have a layer named “Controls” with a point control named Box Position to control the position of the box in both precomps. You should be able to do it with an expression like this for each box position:
L1 = comp("Master").layer("Controls");
L2 = comp("Master").layer(thisComp.name);
p = L1.toComp(L1.effect("Box Position")("Point"));
L2.fromComp(p)
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Amazing, this works perfectly. Thank you so much!
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