• Adobe After Effects Expressions

  Combining expressions on same layer

  Posted by Sean Platt on October 16, 2015 at 5:05 pm

  Hi. I am new at learning expressions and trying to figure out how to combine to expressions on same layer. Essentially, I am trying to bounce an object into the frame from off stage and then begin to wiggle once it has finished the bounce. Any help would be greatly appreciated.

  
<b>The first expression I am using is:</b>

  amp = .03;
  freq = 3.0;
  decay = 5.0;
  n = 0;
  if (numKeys > 0){
  n = nearestKey(time).index;
  if (key(n).time > time){
  n--;
  }}
  if (n == 0){ t = 0;
  }else{
  t = time - key(n).time;
  }
  if (n > 0 && t < 1){
  v = velocityAtTime(key(n).time - thisComp.frameDuration/10);
  value + v*amp*Math.sin(freq*t*2*Math.PI)/Math.exp(decay*t);
  }else{value}

  <b>The second expression I want to add is:</b>

  wiggle(1,9)

  Sean Platt replied 10 years, 6 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Dan Ebberts

  October 16, 2015 at 5:30 pm

  I would put the wiggle at the top of the expression (saving the actual wiggle amount into variable w):

  w = wiggle(1,9) – value;

  then add it in at the bottom like this:

  value + v*amp*Math.sin(freq*t*2*Math.PI)/Math.exp(decay*t) + w;
  }else{value + w}

  Dan
• 

  Sean Platt

  October 16, 2015 at 5:38 pm

  Dan, thank you so much. I hope I can get my head wrapped around this better someday.

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