private static int getClosestSnappedOffset(BeatmapElement element, TimingPoint closestPoint, out int closestSnapDivisor)
{
// Gets the closest snap value in the beat. If multiple snaps
// are found, then we also return a closestSnapIndex with
// a value different than -1, in which case the note's snap
// does not change and instead gets presented into the user.
decimal snap = Convert.ToDecimal(element.GetClosestSnap());
decimal rawSnap = snap % BEAT_SNAP_DIVISOR_2;
decimal snapDiff = snap - rawSnap;
decimal result = snapsArray.BinarySearchClosest(rawSnap);
decimal diff = Math.Abs(rawSnap - result);
closestSnapDivisor = -1;
// Diff = 0 or equal offsets means this element is exactly snapped.
if (diff == 0 || closestPoint.Offset == element.Offset)
{
return(0);
}
// If we calculate that this object's new snap result
// causes the offset not to be shifted, consider
// it as snapped.
decimal targetSnap = snapDiff + result;
// Make the calculation by casting it to integer. If the offset are equal, these are snapped.
int targetOffset = (int)(Convert.ToDecimal(closestPoint.Offset) + (targetSnap / BEAT_SNAP_DIVISOR_2 * Convert.ToDecimal(closestPoint.PointValue)));
if ((int)element.Offset == targetOffset)
{
return(0);
}
return(targetOffset);
}
private static int getSnapInBetween(BeatmapElement target1, BeatmapElement target2, double beatDuration)
{
double offsetDifference = target2.Offset - target1.Offset;
double snap = (offsetDifference / beatDuration) * BEAT_SNAP_DIVISOR;
int snapInt = Convert.ToInt32(snap);
double fluctuation = Math.Abs(snap - snapInt);
double targetOffset = target1.Offset + (snapInt / BEAT_SNAP_DIVISOR * beatDuration);
if (fluctuation < 0.1d || Math.Abs(target2.Offset - targetOffset) < 1)
{
// We can consider this note as snapped in the end.
// TODO Determine the behavior here: let the object unsnapped
// if it is a hitsound, or show an error message.
return(snapInt);
}
else
{
// The note is definitely unsnapped. Take this note as the 0 snap and
// reset the final snap variable.
// TODO Either fill this area with an error message
// or throw an exception, or find another idea to process unsnapped notes.
Console.WriteLine("Detected an unsnapped object with type \"" + target1.GetType() + "\", " +
"and offset " + target1.Offset);
return(-1);
}
}
private static void setOffsetOfElementToNewSnap(TimingPoint closestRedPoint, BeatmapElement element)
{
decimal snap = (decimal)element.GetSnap();
decimal pointValue = (decimal)closestRedPoint.PointValue;
decimal finalResult = (decimal)closestRedPoint.Offset + (pointValue / (decimal)BEAT_SNAP_DIVISOR * snap);
element.SetOffset((double)finalResult);
}
public static double[] getRelativeSnap(List <TimingPoint> timingPoints, BeatmapElement target)
{
// First holds the true snap which is from the first point,
// second holds the snap value from the closest timing point.
double[] result = new double[2] {
0, 0
};
// If this is the first timing point or the element is snapped on the first timing point,
// its actual and relative snaps should always equal to 0. Check the condition
// and return it immediately.
if (timingPoints.Count == 0 || (target.Offset == timingPoints[0].Offset && !timingPoints[0].IsInherited))
{
return(result);
}
// Get the closest timing point to this target.
TimingPoint closestPoint = SearchUtils.GetClosestTimingPoint(timingPoints, target.Offset);
// Now, the beat snap divisor divides the beat to specific parts, and
// we need to calculate both relative and actual snaps.
// Actual snap would be closestPoint + relativeSnap while
// relative snap is calculated by closest red point's point
// value (a.k.a millis value between 2 beats, 60000 / BPM).
// Diff of objects in millis calculated as decimal
// for maximum precision.
decimal diff = Convert.ToDecimal(target.Offset - closestPoint.Offset);
// Relative snap value based on BEAT_SNAP_DIVISOR.
decimal relativeSnap = diff * BEAT_SNAP_DIVISOR_2 / Convert.ToDecimal(closestPoint.PointValue);
// Actual snap value.
decimal actualSnap = Convert.ToDecimal(closestPoint.GetSnap()) + relativeSnap;
// Set the results and return. First is actual snap
// from the start of the map, second is relative
// snap from the closest red point.
result[0] = Convert.ToDouble(actualSnap);
result[1] = Convert.ToDouble(relativeSnap);
return(result);
}