• Adobe After Effects Expressions

  generate varying lengths of random numbers

  Posted by Shaun Young on April 18, 2009 at 8:02 pm

  I want to create an effect using expressions that will randomly generate numbers on one line with length between say 3 and 15 digits, then move that line down 1 and generate a new line at the top, repeating, so it looks like a stream of ‘data’ is being received, logged, and scrolled down the comp.

  i’m very new to expressions and was hoping someone could help.

  Shaun Young replied 17 years, 4 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  April 18, 2009 at 8:30 pm

  The are a lot of possibilities. Try plugging this into the source text property of a text layer:

  frames = 4; // generate new number every 4 frames
  minDigits = 3;
  maxDigits = 15;

  f = timeToFrames();
  n = Math.floor(f/frames);

  s = “”;
  seedRandom(index,true)

  while (n >= 0){
  num = “” + Math.floor(random(100000000000000,999999999999999));
  numDigits = Math.floor(random(minDigits,maxDigits));
  s = num.substr(0,numDigits) + “r” + s;
  n–;
  }
  s

  Dan
• 

  Shaun Young

  April 18, 2009 at 8:58 pm

  This is perfect! Thank you so much!

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