• Adobe After Effects Expressions

  Scale Expression with Bounce Inertia

  Posted by Scott Skaja on November 9, 2016 at 1:50 pm

  I am ever learning at Expressions and am in need of help from people smarter than I.

  I want to scale an object and have it bounce to a stop. I found Dan Ebberts post on this topic from a few years ago. The expression listed below mostly works for me, the only thing I would like to eliminate is the bounce out, I just want it to scale bounce in and hold, that’s it. How would I modify the following to achieve this?

  rate = 500;
rampDur = value[0]/rate;
freq = 3;
decay = 5;
w = freq*Math.PI*2;

  if (time < (inPoint+outPoint)/2){
if (time < (inPoint + rampDur)){
s = linear(time,inPoint,inPoint+rampDur,0,value[0]);
}else{
t = time - (inPoint+rampDur);
s = value[0] + rate*Math.sin(t*w)/Math.exp(t*decay)/w;
}
}else{
if (time > (outPoint - rampDur)){
s = linear(time,outPoint-rampDur,outPoint,value[0],0);
}else{
t = (outPoint - rampDur) - time;
s = value[0] + rate*Math.sin(t*w)/Math.exp(t*decay)/w;
}
}
[s,s]

  scott skaja
  tangletown post – edit•animate•design•composite•color correct
  tangletownpost.com

  Scott Skaja replied 9 years, 6 months ago 1 Member · 0 Replies
• 0 Replies

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