• Adobe After Effects Expressions

  Reverse Adobe expression at the end of the comp

  Posted by Maëlle Jumel on August 23, 2017 at 9:38 pm

  Hello!
  I have this text expression to make the text appear smoothly. I would like for the text to go back as it went in. At first I thought I could just duplicate the layer and reverse it. But I’m certain it’s possible to do this with the expression, so here I am posting to ask if anyone knows how to do this ☺ Thank you!

  delay = .1;
myDelay = delay*textIndex;
t = (time - inPoint) - myDelay;
if (t >= 0){
freq =2;
amplitude = 100;
decay = 8.0;
s = amplitude*Math.cos(freq*t*2*Math.PI)/Math.exp(decay*t);
[s,s]
} else {
value
}

  Asus Windows 10 PC
  Intel Core i5 6300HQ CPU 2.30GHZ
  RAM 8GB
  Nvidia GeForce GTX 960M
  After Effect CC 2014 13.0.0.214

  Niek De korte replied 8 years, 5 months ago 3 Members · 4 Replies
• 4 Replies

• 

  Dan Ebberts

  August 23, 2017 at 10:08 pm

  Play around with this:

  
delay = .1;
myInDelay = delay*textIndex;
myOutDelay = delay*(textTotal -textIndex + 1);
tStart = inPoint + myInDelay;
tStop = outPoint - myOutDelay;
if ((time < tStart) || (time > tStop)){
t = 0;
}else{
if (time < (tStart + tStop)/2){
t = time - tStart;
}else{
t = tStop - time;
}
}
freq =2;
amplitude = 100;
decay = 8.0;
s = amplitude*Math.cos(freq*t*2*Math.PI)/Math.exp(decay*t);
[s,s]


  Dan
• 

  Maëlle Jumel

  August 24, 2017 at 3:39 pm

  Thank you Dan, this totally did the trick! Sorry I’m a newbie, could you tell me what the t represents in the expression? I understand the basics of JS

  Asus Windows 10 PC
  Intel Core i5 6300HQ CPU 2.30GHZ
  RAM 8GB
  Nvidia GeForce GTX 960M
  After Effect CC 2014 13.0.0.214
• 

  Dan Ebberts

  August 24, 2017 at 5:20 pm

  For the in animation, t represents the time elapsed since the start of the animation. For the out animation, t represents the time remaining.

  Dan
• 

  Niek De korte

  March 5, 2018 at 2:32 pm

  Hi Dan,

  I’m trying to figure out how this expression would work on lets say the scale or position of a regular layer, but I can’t seem to find a solution. Do you have any suggestions?

  Regards, Niek

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