Try opacity.wiggle(10,50) for a faulty projector flicker effect, where 10 is frequency – changes per second, and 50 is the amplitude – the largest value the attribute will change. To add an expression, with the relevant layer attribute highlighted select:Įven if you are new to expressions and scripting, there is still a lot you can do, with some very basic in built expressions.įor example you can use the wiggle expression to randomly effect the values of various layer attributes for different effects: After Effects uses JavaScript 1.2 for expressions, so if you’re pretty handy with ActionScript or JavaScript or the like, there’s a lot you can do within After Effects. But what you cannot do with flash is to take an “Action-Scripted” animation and render it to use in broadcast or film – with After Effects you can. One of the primary strengths of Flash is its ability to use scripting to calculate variables and attribute values on the fly, which keeps file sizes down and interactivity to a maximum.
While its implementation may not be as strong or as easy as using Action Script in Flash 5, it has one critical advantage. One of the most powerful and yet often under utilised additions to After Effects from version 5 onwards is the inclusion of expressions.
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