• Adobe After Effects Expressions

  switching AE Layers randomly on (within a given time)

  Posted by Baba Luba on February 18, 2019 at 12:51 pm

  Im looking for a Script witch set the opacity of a layer randomly to 100% (starting with 0)
  I found this within the forums:

  —————————-
  holdTime = .5; //time to hold each position (seconds)
  seed = Math.floor(time/holdTime);
  seedRandom(seed,true);
  hmm = random(0,10);
  if (hmm >5){
  transform.opacity=100};
  else {transform.opacity=0};

  its kind of what I want, but I want the layers to stay on.
  ——————————-

  If I could make a wish it should do this:

  switch the opacity of a layer on within a given time (a variable) say a second (randomly within this second switch on)

  then stay on for a given time (3,5,10 sek another variable)

  than switch back off within a given time

  on within a second
  stay on for 5 sekonds
  off after (in this case) 6 seconds within a second
  together 7 seconds

  any idea, I’m not good at coding ;O)

  Baba Luba replied 7 years, 5 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  February 18, 2019 at 1:56 pm

  This might be close:

  
minOnTime = 0;
maxOnTime = 1;
holdTime = 3;
minOffTime = 0;
maxOffTime = 1;
seedRandom(index,true);
onTime = random(minOnTime,maxOnTime);
offTime = random(minOffTime,maxOffTime);
if (time < onTime){
0;
}else if (time < onTime+holdTime+offTime){
100;
}else{
0;
}


  Dan
• 

  Baba Luba

  February 18, 2019 at 3:47 pm

  thank you very much !!!

  I just tried it and it seems to work
  very much appreciated

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