• Adobe After Effects Expressions

  Wiggle and layer order

  Posted by Alex Dinnin on February 16, 2009 at 6:14 pm

  Could someone help me out please ???

  I have applied the following expression to the position on about 12 layers.

  x=wiggle (.8,250) [0];
  y=wiggle (.6. 205) [1];
  {x,y]

  It works a treat, randomly moving the layers about..

  HOWEVER… whenever I change the layer order.. the animation completley changes..

  is this expression controlled by layer order ??

  It’s not the end of the world.. just a little bit irritating..

  anyone know of a fix ???

  regards

  Alex

  Alex Dinnin replied 17 years, 5 months ago 2 Members · 4 Replies
• 4 Replies

• 

  Dan Ebberts

  February 16, 2009 at 9:59 pm

  If you like a particular wiggle, you can just add a seedRandom() call with the current layer number minus 1. For example, if you like the layer’s wiggle as layer 1, use this:

  seedRandom(0);
  x=wiggle (.8,250) [0];
  y=wiggle (.6, 205) [1];
  [x,y]

  Dan
• 

  Alex Dinnin

  February 17, 2009 at 9:50 am

  Hi Dan,

  OK.. I added your expression and AE didn’t like it at all, I put in the layer number randomseed (7);

  but it didn’t like it, then tried pickwhipping the whole layer, but still no.

  I tried a it with just random, which the expression was happy.. it’s just didn’t do anything.. when I moved the layer, they still changed position.

  any ideas ??

  thanks for your continued help

  Alex
• 

  Dan Ebberts

  February 17, 2009 at 2:29 pm

  So if you copy and paste the expression from my post into a postion expression it generates an error? What’s the error message.

  By the way, I don’t know if this is the problem or not, but it’s seedRandom(), not seedrandom().

  Dan
• 

  Alex Dinnin

  February 18, 2009 at 3:53 pm

  Hi Dan,

  Sorry it must have been finger trouble.. tried it again today and it works fine..

  I still don’t really understand how it works..

  but thanks anyway

  regards

  Alex

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