Turning on/off expressions at a specific keyframe?

[Aharon Rabinowitz]

You can convert the expression to keyframes by selecting the property with the expression and then choose

Animation > Keyframe Assistan > Convert Expression to keyframes

Once this is done, the expression is disabled and you can take whatever frame you want and make it whatever value you want, and it will be keyframed. You can just delete any keyframes you want as well.

—————————————-
Aharon Rabinowitz
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http://www.allbetsareoff.com
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[Julian Sixx]

Hi
..or you apply a Checkbox Control effect to your layer and add this position expression

control = effect(“Checkbox Control 1”)(“Checkbox”) ;

if (control == 1){
wiggle(10,50); // your expression goes here
}else{
value;
}
Now set keyframes for the Checkbox effect

[Mike Clasby]

Or…

Tie either Frequency or Amplitude of the wiggle to a slider, then keyframing the slider. Zero as a keyframes kills the wiggle dead, a positive value down the line builds to the wiggle gradually. To keep it Zero until the next positive keyframe make the “0” kayframe a Hold Keyframe (right click the keyframe).

In case you don’t know how:

wiggle (5,20)

highlight (select) the 5 (Frequency), then pickwhip to a slider stopwatch(Effect>Expression Controls>Slider Control) and you have an expression like this:

wiggle (effect(“Slider Control”)(“Slider”),20)

Setting keyframes with the slider now puts you in complete control. Full tilt wiggle or slowly build to your wiggle/taper off to zero.

[Mike Clasby]

Glad Dan’s Creating Trails expression worked for you down below.

[Waldemar Werbel]

Nice one guys. All solutions very useful!

Top stuff.

Thanks again.

—
w.werbel. uk.

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