Combinig expressions with keyframes

[Paul Hennell]

Might be other better ways to do this but I’ve used this in the past –

[Add Checkbox expression control]

if (effect("Checkbox Control")("Checkbox") == 1){
wiggle(10,100);
}else{
100
}

—
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[Chris Arnold]

timeToStart = 2; 
  timeToStop = 4; 
    
  if ((time > timeToStart) && (time < timeToStop)){ 
      wiggle(3,25); 
  }else{ 
      value; 
  }

Also, you can tell expressions when to start or stop via time or frame numbers.

Here’s a link to adobe docs where they have info on how to stop and start a wiggle by just typing in the time you want it to stop and start. Same as code I placed in here.

https://livedocs.adobe.com/en_US/AfterEffects/8.0/help.html?content=WS22BD9B45-A813-4b13-996D-A4561D108A8C.html

[Filip Vandueren]

In the case of Wiggle, you could also add a Slider Expression Control, and use that value as the wiggle amount.

So you can keyframe from 0 (= no wiggle) to 100, instead of suddenly switching off the wiggle which will most likely cause the layer to jump from one position to another in 1 frame.