// Gets max velocity in SV
private static double GetMaxVelocity(SlideratorVm viewModel, IReadOnlyList <IGraphAnchor> anchors)
{
double maxValue;
if (viewModel.GraphModeSetting == SlideratorVm.GraphMode.Velocity) // Integrate the graph to get the end value
// Here we use SvGraphMultiplier to get an accurate conversion from SV to slider completion per beat
// Completion = (100 * SliderMultiplier / PixelLength) * SV * Beats
{
maxValue = Math.Max(AnchorCollection.GetMaxValue(anchors), -AnchorCollection.GetMinValue(anchors));
}
else
{
maxValue = Math.Max(AnchorCollection.GetMaxDerivative(anchors), -AnchorCollection.GetMinDerivative(anchors)) / viewModel.SvGraphMultiplier;
}
return(maxValue);
}
private static double GetMinCompletion(SlideratorVm viewModel, IReadOnlyList <Anchor> anchors)
{
double minValue;
if (viewModel.GraphMode == GraphMode.Velocity) // Integrate the graph to get the end value
// Here we use SvGraphMultiplier to get an accurate conversion from SV to slider completion per beat
// Completion = (100 * SliderMultiplier / PixelLength) * SV * Beats
{
minValue = AnchorCollection.GetMinIntegral(anchors) * viewModel.SvGraphMultiplier;
}
else
{
minValue = AnchorCollection.GetMinValue(anchors);
}
return(minValue);
}
private string Sliderate(SlideratorVm arg, BackgroundWorker worker)
{
// Make a position function for Sliderator
Classes.Tools.Sliderator.PositionFunctionDelegate positionFunction;
// Test if the function is a constant velocity
bool constantVelocity;
// We convert the graph GetValue function to a function that works like ms -> px
// d is a value representing the number of milliseconds into the slider
if (arg.GraphModeSetting == SlideratorVm.GraphMode.Velocity)
{
// Here we use SvGraphMultiplier to get an accurate conversion from SV to slider completion per beat
// Completion = (100 * SliderMultiplier / PixelLength) * SV * Beats
positionFunction = d =>
arg.GraphState.GetIntegral(0, d * arg.BeatsPerMinute / 60000) * arg.SvGraphMultiplier *
arg.PixelLength;
constantVelocity = Precision.AlmostEquals(AnchorCollection.GetMaxValue(arg.GraphState.Anchors),
AnchorCollection.GetMinValue(arg.GraphState.Anchors));
}
else
{
positionFunction = d => arg.GraphState.GetValue(d * arg.BeatsPerMinute / 60000) * arg.PixelLength;
constantVelocity = Precision.AlmostEquals(AnchorCollection.GetMaxDerivative(arg.GraphState.Anchors),
AnchorCollection.GetMinDerivative(arg.GraphState.Anchors));
}
// Dont do Sliderator if the velocity is constant AND equal to the new velocity
var simplifyShape = constantVelocity && Precision.AlmostEquals(
arg.PixelLength / arg.GraphBeats / arg.GlobalSv / 100,
arg.NewVelocity);
// Get the highest velocity occuring in the graph
double velocity = arg.NewVelocity; // Velocity is in SV
// Do bad stuff to the velocity to make sure its the same SV as after writing it to .osu code
velocity = -100 / double.Parse((-100 / velocity).ToInvariant(), CultureInfo.InvariantCulture);
// Other velocity is in px / ms
var otherVelocity = velocity * arg.SvGraphMultiplier * arg.PixelLength * arg.BeatsPerMinute / 60000;
// Time between timeline ticks for stream export
var deltaT = 60000 / arg.BeatsPerMinute / arg.BeatSnapDivisor;
// Update progressbar
if (worker != null && worker.WorkerReportsProgress)
{
worker.ReportProgress(10);
}
List <Vector2> slideration = new List <Vector2>();
var sliderator = new Classes.Tools.Sliderator {
PositionFunction = positionFunction, MaxT = arg.GraphBeats / arg.BeatsPerMinute * 60000,
Velocity = otherVelocity,
MinDendriteLength = arg.MinDendrite
};
if (!simplifyShape)
{
// Get slider path like from the hit object preview
var sliderPath = new SliderPath(arg.VisibleHitObject.SliderType,
arg.VisibleHitObject.GetAllCurvePoints().ToArray(),
GetMaxCompletion(arg, arg.GraphState.Anchors) * arg.PixelLength);
var path = new List <Vector2>();
sliderPath.GetPathToProgress(path, 0, 1);
// Update progressbar
if (worker != null && worker.WorkerReportsProgress)
{
worker.ReportProgress(20);
}
// Do Sliderator
sliderator.SetPath(path);
slideration = arg.ExportAsStream ?
sliderator.SliderateStream(deltaT) :
sliderator.Sliderate();
// Check for some illegal output
if (double.IsInfinity(sliderator.MaxS) || double.IsNaN(sliderator.MaxS) ||
slideration.Any(v => double.IsNaN(v.X) || double.IsNaN(v.Y)))
{
return("Encountered unexpected values from Sliderator. Please check your input.");
}
}
// Update progressbar
if (worker != null && worker.WorkerReportsProgress)
{
worker.ReportProgress(60);
}
// Exporting stuff
BeatmapEditor editor;
bool editorRead = false;
if (arg.DoEditorRead)
{
editor = EditorReaderStuff.GetNewestVersionOrNot(arg.Path, out _, out var exception);
if (exception == null)
{
editorRead = true;
}
arg.DoEditorRead = false;
}
else
{
editor = new BeatmapEditor(arg.Path);
}
var beatmap = editor.Beatmap;
var timing = beatmap.BeatmapTiming;
// Get hit object that might be present at the export time or make a new one
var hitObjectHere = beatmap.HitObjects.FirstOrDefault(o => Math.Abs(arg.ExportTime - o.Time) < 5) ??
new HitObject(arg.ExportTime, 0, SampleSet.Auto, SampleSet.Auto);
// Clone the hit object to not affect the already existing hit object instance with changes
var clone = new HitObject(hitObjectHere.GetLine())
{
IsCircle = arg.ExportAsStream, IsSpinner = false, IsHoldNote = false, IsSlider = !arg.ExportAsStream
};
// Update progressbar
if (worker != null && worker.WorkerReportsProgress)
{
worker.ReportProgress(70);
}
if (!arg.ExportAsStream)
{
// Give the new hit object the sliderated anchors
if (simplifyShape)
{
// The velocity is constant, so you can simplify to the original slider shape
clone.SetAllCurvePoints(arg.VisibleHitObject.GetAllCurvePoints());
clone.SliderType = arg.VisibleHitObject.SliderType;
}
else
{
clone.SetAllCurvePoints(slideration);
clone.SliderType = PathType.Bezier;
}
clone.PixelLength = sliderator.MaxS;
clone.SliderVelocity = -100 / velocity;
// Add hit object
if (arg.ExportModeSetting == SlideratorVm.ExportMode.Add)
{
beatmap.HitObjects.Add(clone);
}
else
{
beatmap.HitObjects.Remove(hitObjectHere);
beatmap.HitObjects.Add(clone);
}
// Add SV
var timingPointsChanges = new List <TimingPointsChange>();
if (arg.DelegateToBpm)
{
var tpAfter = timing.GetRedlineAtTime(clone.Time).Copy();
var tpOn = tpAfter.Copy();
tpAfter.Offset = clone.Time;
tpOn.Offset = clone.Time - 1; // This one will be on the slider
tpAfter.OmitFirstBarLine = true;
tpOn.OmitFirstBarLine = true;
// Express velocity in BPM
tpOn.MpB /= -100 / clone.SliderVelocity;
// NaN SV results in removal of slider ticks
clone.SliderVelocity = arg.RemoveSliderTicks ? double.NaN : -100;
// Add redlines
timingPointsChanges.Add(new TimingPointsChange(tpOn, mpb: true, inherited: true, omitFirstBarLine: true, fuzzyness: 0));
timingPointsChanges.Add(new TimingPointsChange(tpAfter, mpb: true, inherited: true, omitFirstBarLine: true, fuzzyness: 0));
clone.Time -= 1;
}
// Add SV for every hit object so the SV doesnt change for anything else than the sliderated slider
timingPointsChanges.AddRange(beatmap.HitObjects.Select(ho => {
var sv = ho == clone ? ho.SliderVelocity : timing.GetSvAtTime(ho.Time);
var tp = timing.GetTimingPointAtTime(ho.Time).Copy();
tp.MpB = sv;
tp.Offset = ho.Time;
return(new TimingPointsChange(tp, mpb: true, fuzzyness: 0));
}));
TimingPointsChange.ApplyChanges(timing, timingPointsChanges);
}
else
{
// Add hit objects
if (arg.ExportModeSetting == SlideratorVm.ExportMode.Override)
{
beatmap.HitObjects.Remove(hitObjectHere);
}
double t = arg.ExportTime;
foreach (var pos in slideration)
{
clone.Pos = pos;
clone.Time = t;
beatmap.HitObjects.Add(clone);
clone = new HitObject(clone.GetLine())
{
IsCircle = true, IsSpinner = false, IsHoldNote = false, IsSlider = false, NewCombo = false
};
t += deltaT;
}
}
// Update progressbar
if (worker != null && worker.WorkerReportsProgress)
{
worker.ReportProgress(80);
}
beatmap.SortHitObjects();
editor.SaveFile();
// Complete progressbar
if (worker != null && worker.WorkerReportsProgress)
{
worker.ReportProgress(100);
}
// Do stuff
if (arg.Quick)
{
RunFinished?.Invoke(this, new RunToolCompletedEventArgs(true, editorRead));
}
return(arg.Quick ? string.Empty : "Done!");
}