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Make a layer revolve in a circle

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From Adobe's LiveDocs:
You can create an expression without using properties from other layers. For example, you can make a layer revolve in a perfect circle.
After Effects CS3
Useful things

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1. Select a layer, press P to reveal its Position property in the Timeline panel, and Alt-click (Windows) or Option-click (Mac OS) the stopwatch to the left of the property name.
2. Enter the following in the expression field
[(thisComp.width/2), (thisComp.height/2)] + [Math.sin(time)*50, -Math.cos(time)*50]

(Min. Version: After Effects CS3, Category: Useful things, Type: Expressions)
posted by MicGyver on Sep 24, 2008


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