After Effects Expressions

Chapter 8

Randomness

Another Look at Wiggle()

Up to now, we’ve been using wiggle() to generate all of our random numbers. I’m a big wiggle() fan, but sometimes I need more control. For instance, what if I want to generate a random Rotation between 90 and 180 degrees? It’s hard to make wiggle() stay within a specific range. The range for wiggle() always starts with the property’s default value.

I could get what I want, but I’d have to first set Rotation to 0. Then, I’d have to apply the wiggle() Expression as follows (Chapter08.aep, Comp1):

135 + wiggle(1,45)

Starting from a default of 0, this Expression sets Rotation to 135 plus a random number. That random number could be any number from −45 to 45. If it’s negative 45, then the Expression resolves ...