• Adobe After Effects Expressions

  expression help

  Posted by Aaron Williams on February 7, 2007 at 1:59 am

  okay, i’m new to expressions, and i’m trying to make a particle generator’s velocity react to audio keyframes. so far no problem, until i try to create an “if, then” statement. so far my expression is as such:

  x=thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”);
  thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”)*2;

  what i want to do is say, “when x is more than 50, multiply by Y”

  Y can either be a number instead of 2 or in addition to 2, i don’t care. i just want that extra punch of velocity when the value goes over 50.

  thanks in advance!

  —
  Aaron Williams
  https://www.reaction-films.com
  https://www.roarnetwork.com

  Mike Clasby replied 19 years, 3 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Mike Clasby

  February 7, 2007 at 2:28 am

  This works in test:

  x=thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”);

  if (x > 50){
  x*2
  }else{
  x
  }

  I got this form from Dan’s page, here:

  https://www.motionscript.com/mastering-expressions/language-beginning-4.html

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