private static double getClosestSnappedTime(TimingControlPoint timingPoint, double time, int beatDivisor)
{
var beatLength = timingPoint.BeatLength / beatDivisor;
var beatLengths = (int)Math.Round((time - timingPoint.Time) / beatLength, MidpointRounding.AwayFromZero);
return(timingPoint.Time + beatLengths * beatLength);
}
/// <summary>
/// Returns the beat snap divisor closest to the given time. If two are equally close, the smallest divisor is returned.
/// </summary>
/// <param name="time">The time to find the closest beat snap divisor to.</param>
/// <param name="referenceTime">An optional reference point to use for timing point lookup.</param>
public int GetClosestBeatDivisor(double time, double?referenceTime = null)
{
TimingControlPoint timingPoint = TimingPointAt(referenceTime ?? time);
int closestDivisor = 0;
double closestTime = double.MaxValue;
foreach (int divisor in BindableBeatDivisor.VALID_DIVISORS)
{
double distanceFromSnap = Math.Abs(time - getClosestSnappedTime(timingPoint, time, divisor));
if (Precision.DefinitelyBigger(closestTime, distanceFromSnap))
{
closestDivisor = divisor;
closestTime = distanceFromSnap;
}
}
return(closestDivisor);
}