• Adobe After Effects Expressions

  Can someone explain how the wiggle expression parameters work?

  Posted by Tom Carter on May 10, 2006 at 7:41 pm

  I’m trying to use the wiggle expression to change the opacity of an image in my comp. I want the opacity centered around 50% and for it to wiggle from anything from 0% to 100%.

  At the moment the opacity of the layer is set to 50%, so my expression looks like:

  wiggle(4, amp)

  The question is, will the ‘amp’ setting wiggle above and below 50% by amount you set, or is that the total range of the wiggle (in other words half above and half below)?

  i.e. do I need an amp of 50 (giving me 50 above and below 50%), or do I need an amp of 100 to get the range I need?

  Thanks for looking and I hope this makes sense…

  Tom

  http://www.crate20.co.uk

  Tom Carter replied 19 years, 12 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  May 10, 2006 at 9:11 pm

  It will wiggle around the static or keyframed value of the parameter. If you have opacity set to 50% and use the expression wiggle(4,50) you’ll get what you’re after. Open the expression graph and you’ll see what’s happening.

  Dan
• 

  Tom Carter

  May 11, 2006 at 12:57 am

  Brilliant. Thanks.

  http://www.crate20.co.uk

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