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Scale expression
Hi,
I have an animation that I have keyframed, I’d like to know whether there is an expression that could save me the time of keyframing this.
Basically, I have two solids (A&B) aligned against each other. If A scales down I want B to retain its size and translate in position to the scale of A, vice versa. Also, I want the expression to have a state where I can have both the solids the exact same size.
I’ve attached a reference.
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1 Reply
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When solid 1 is 100% scale, solid 2 is 50% and vice versa. So we can set the scale of the second solid thus:
[150, 150]- thisComp.layer(“Shape Layer 1”).transform.scale
To make its left edge line up with the right edge of solid 1, we can just put the anchor points of the solids at the bottom left and bottom right respectively. The easiest way to set this is to use the pan behind tool. Hit y and drag the anchor point to the lower left of the blue solid, holding ctrl to snap it to the corner point. Do the same for the red solid, but drag it to the lower right corner, holding ctrl to snap.
Delete all the position keyframes, and apply the expression above to the scale property of solid 2.
The values of anchor points of solid 1 in the file you shared were [0,540] and for solid 2 [960,540]. Then the position of solid 1 was [236,810] and solid 2 [1676,810].
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