EaseBackInOut method

double EaseBackInOut(
  1. num t,
  2. num b,
  3. num c,
  4. num d,
)

Implementation

double EaseBackInOut(num t, num b, num c, num d)
{
  num s = 1.70158;
  if ((t/=d/2.0) < 1.0)
  {
    s *= 1.525;
    return (c/2.0*(t*t*((s + 1.0)*t - s)) + b);
  }

  final postFix = t-=2.0;
  s *= 1.525;
  return (c/2.0*((postFix)*t*((s + 1.0)*t + s) + 2.0) + b);
}