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Scale layer based on another object’s position
I always forget how to do this, and I never seem to write it down.
Imagine a layer in AE. If you pull on the edge of that layer, you expand the layer out as far as you pull it.
I’m trying to do the same with a rectangle and an object on its right. If I pull the object out to the right, the rectangle needs to scale x out at the same rate that I moved the object.
I thought linear() would do it, but realized that just sets a range. I need to be able to stretch this out as much or as little as I need it. The rectangle’s anchor is set to left center edge so scaling works properly on x.
Can someone refresh my memory on the process for this? Thanks.
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4 Replies
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This might work, depending on how you have things set up:
L = thisComp.layer(“object”);
d = L.toComp([0,0])[0] – toComp([0,0])[0];
s = (d/width)*100;
[s,s]Dan
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Hmm, not quite. As I pull object out, rectangle scales, but at a slower rate than object. Ideally the scale of rectangle should be that the edge of rectangle looks like its attached to object as its pulled out.
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It should work if your two objects are solid layers that aren’t rotated or masked. Shape or text layers, or anything involving rotation and/or masking would be a different story.
Dan
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Ah, I should have been more specific then. Rectangle is a shape layer with its anchor positioned to middle left. The object is also another shape layer.
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