• Adobe After Effects Expressions

  random expression using only 3 possible values

  Posted by Nick Kirastoulis on October 27, 2011 at 7:01 am

  Hey everyone, I need help with a certain kind of expression. I was wondering how to get a set of specific numbers to alternate randomly over time. For example: the values 90, 180, 270 will randomly alternate and be active for a random ammount of time.

  Any help is greatly appreciated.

  Nick Kirastoulis replied 14 years, 6 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  October 27, 2011 at 3:03 pm

  Play around with this:

  
segMin = .5;
segMax = 1.0;
val = [90,180,270];
tPrev = 0;
tCurr = 0;
seg = 0;
seedRandom(index,true);
while (tCurr <= time){
tPrev = tCurr;
tCurr += random(segMin,segMax);
seg++;
}
seedRandom(seg,true);
val[Math.floor(random(val.length))]


  Dan
• 

  Nick Kirastoulis

  October 30, 2011 at 4:03 am

  Oh wow, thank you very much! that’s exactly what i needed.

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