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Inverse Motion
Hello! I am making a butterfly in AE. It’s very simple, 2 wings promoted to 3D. I have moved the anchor points for each wing to the inside edge (where the body would be).
I want to write an expression so I can animate one wing (y-rotation property) and the other wing will inversely match.
I checked out some of the IK posts and the IK lesson on Dan’s site but I think (hope) that’s more complex than what I need here.
I think I can pick whip one wing’s y-rotation to the other, I just don’t know how to alter the expression to invert the second wing’s motion.
Any help would be great. Thanks, Chris
Chris Heuer
Freefall FX, LLC -
3 Replies
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Depending on how you set it up, it could be as simple as just adding a minus sign in front of the pickwhip-generated expression.
Dan
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That’s sort of what I thought but I put the minus in the wrong place and disabled the expression! I’m such a math wiz!
Thanks, Chris
Chris Heuer
Freefall FX, LLC -
you can also add *(-1) if that makes more sense…
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