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The text turns Red, telling you there is an expression applied.

Option (Mac) or Alt (PC) click on the stopwatch to create the expression. I want the position of this text to wiggle, so select the text layer and hit P to open the Position Transform properties. The Wiggle Expression in After Effectsįor this example I created the word ‘wiggle’ from text. Instead of creating a bunch of keyframes to make a layer randomly move, we can do this with a couple of numbers. Wiggle is one of the most popular After Effects expressions, as it is easy to use and visually interesting. If you’ve ever seen animations where light is flickering or a camera shakes, it’s likely you’ve seen the wiggle expression in action. When you understand them they really aren’t scary and can end up saying you a lot of time. In this post we’ll show you how to create wiggle easily by modifying numbers…not keyframes.Įditors sometime cringe at the word expressions, but have no fear. There is almost always a little overshoot when you use wiggle.Use an expression to create random movement with the wiggle expression in After Effects. The larger the amplitude value, the longer the movement will pause. In this screenshot at 20 cycles per second and a distance of 10 pixels, I only get 2 clamped values with a maximum duration of 3 frames. If you want to make sure that the movement hits the hard stops often at 444 and 466 you need to use 11. The overshoot depends on the frequency and it can be 1 or 2 pixels. Wiggle will accelerate just past the stated value on occasion.

If you want a hard clamp then you could write the expression like this: Halfway between is 455 so all you have to do is set the position to any value for x, 455 in the timeline then use this for your expression: The difference between 444 and 466 is 22 and half of that is 11. Wiggle takes the current value and moves it between two values.

The whole structure does not make much sense. Your wiggle result (line 3) has not been defined as a variable that can be added to the resulting array.