• Adobe After Effects Expressions

  Simultaneously turning expressions on/off on multiple layers?

  Posted by Jesper Hellvik andersen on August 28, 2016 at 8:42 am

  Hi guys

  I have multiple layers with a “random position” expression on them. Is there a way to simultaneously switch the expression on and off on all layers (32 of them)?

  The expression is this one:

  seedRandom(index, true)

  a = [-10000, 0, -10000];
  b = [10000, 0, 10000];

  random(a, b);

  I am a complete idiot when it comes to writing codes and scripts but I was thinking if the expression somehow could be linked to a checkbox effect on a separate null layer? That would really make life much easier.

  Crossed fingers
  Jesper

  seedRandom(index, true)

  a = [-10000, 0, -10000];
  b = [10000, 0, 10000];

  random(a, b);


  Kalleheikki Kannisto replied 9 years, 8 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Kalleheikki Kannisto

  August 28, 2016 at 3:28 pm

  You can check if a checkbox on a layer “controls” is on with the code

  seedRandom(index, true);

  a = [-10000, 0, -10000];
  b = [10000, 0, 10000];

  if(thisComp.layer("controls").effect("Checkbox Control")("Checkbox")==1){
random(a, b)
} else value

  Kalleheikki Kannisto
  Senior Graphic Designer

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