• Adobe After Effects Expressions

  Parenting a scale layer of one layer to position of another

  Posted by Sean Platt on March 14, 2016 at 10:14 pm

  Hi There. I was hoping someone could explain what I need to do here. I have a layer that has a wiggle expression for just the y-axis POSITION property. I have another layer that needs to wiggle the x-axis SCALE property In SYNC with the y-axis position property. Any suggestions (and the “why” behind it all so I can help put the pieces together in my head for future) would be most appreciated. Thanks!

  Sean Platt replied 10 years, 1 month ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  March 14, 2016 at 10:36 pm

  One way would be to put an amplitude = 1 wiggle on a slider control:

  wiggle(1,1)

  and then use that as the basis for the wiggles on the other properties (adding a multiplier for the proper scaling). For position, it might look like this (assuming you haven’t separated dimensions):

  w = effect(“Slider Control”)(“Slider”);
  value + [0,w*100]

  and like this for scale:

  w = effect(“Slider Control”)(“Slider”);
  value + [w*50,value[1]]

  Try it–you’ll see how it works.

  Dan

  Oops– the one for scale should be:

  w = effect(“Slider Control”)(“Slider”);
  value + [w*50,v0]
• 

  Sean Platt

  March 15, 2016 at 5:19 pm

  Dan, thanks so much. This worked perfectly. Slowly putting this (expressions) all together in my head 🙂

  Again, thank you for taking the time to help!

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