【AE/教程】眼睛发光

try {
 amp = effect("Elastic Controller Scale Width - Transform")(1) / 200;
 freq = effect("Elastic Controller Scale Width - Transform")(2) / 30;
 decay = effect("Elastic Controller Scale Width - Transform")(3) / 10;
 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){
  v = velocityAtTime(key(n).time - thisComp.frameDuration/10);
  value + v*amp*Math.sin(freq*t*2*Math.PI)/Math.exp(decay*t);
 } else {
  value;
  }
}
catch (e$$4) {
 value = value;
}