/// <summary>
/// Starts with a backwards swing and then accelerates.
/// </summary>
/// <param name="t">Time in the value between 0 and duration (inclusive)</param>
/// <param name="from">Starting value from the ease</param>
/// <param name="to">Target value to ease</param>
/// <param name="duration">Duration of the ease</param>
/// <returns>Eased value</returns>
public static double BackIn(double t, double from, double to, double duration)
{
return(from + (to - from) * Easings.BackIn(t / duration));
}