• Adobe After Effects

  Complicated Opacity/Random/Layers Expression Help.

  Posted by John Cuevas on February 6, 2007 at 4:54 pm

  Hi all, hoping someone might be able to help with this.

  I have a composition with 8 different color solids. Each solid layer is broken up into 24 square masks. These squares need to fade up(18 frames) hold for 1 second, then fade down(18 frames).

  What I need to happen is that the boxes will fade up, then fade down into different colors. I copied one of Mr. Ebberts expressions:

  A = 3;
  B = 7;
  C = 5;
  D = 11;

  f = Math.round(time/thisComp.frameDuration);
  t = 0;
  j = 0;
  while (f >= t){
  j++;
  seedRandom(j,true);
  period1 = Math.round(random(A,B));
  period2 = Math.round(random(C,D));
  t += period2 + period1 + 2
  }
  if (f < t - (period2 + 2)){ 0 }else if (f < t - (period2 + 1)){ random(100) }else if (f < t - 1){ 100 }else{ random(100) } Using this expression + an expression on the actual layer opacity is very close, but these boxes flash way too fast & I don't have any clue how to change the parameters to what I need. Perhaps there is a much better way to approach this, but I'm not seeing it. Thanks Johnny Cuevas Ck&Co Media Productions Johnny Cuevas, Editor http://www.ckandco.net

  John Cuevas replied 19 years, 6 months ago 1 Member · 0 Replies
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