protected override IEnumerable <DifficultyHitObject> CreateDifficultyHitObjects(IBeatmap beatmap, double clockRate)
{
float halfCatchWidth;
using (var catcher = new CatcherArea.Catcher(beatmap.BeatmapInfo.BaseDifficulty))
{
halfCatchWidth = catcher.CatchWidth * 0.5f;
// We're only using 80% of the catcher's width to simulate imperfect gameplay, reduced further at circle sizes above 5.5
halfCatchWidth *= Math.Min(1.075f - (0.05f * beatmap.BeatmapInfo.BaseDifficulty.CircleSize), 0.8f);
}
CatchHitObject lastObject = null;
// In 2B beatmaps, it is possible that a normal Fruit is placed in the middle of a JuiceStream.
foreach (var hitObject in beatmap.HitObjects
.SelectMany(obj => obj is JuiceStream stream ? stream.NestedHitObjects : new[] { obj })
.Cast <CatchHitObject>()
.OrderBy(x => x.StartTime))
{
// We want to only consider fruits that contribute to the combo.
if (hitObject is BananaShower || hitObject is TinyDroplet)
{
continue;
}
if (lastObject != null)
{
yield return(new CatchDifficultyHitObject(hitObject, lastObject, clockRate, halfCatchWidth));
}
lastObject = hitObject;
}
}
public CatchDifficultyCalculator(Ruleset ruleset, WorkingBeatmap beatmap)
: base(ruleset, beatmap)
{
var catcher = new CatcherArea.Catcher(beatmap.BeatmapInfo.BaseDifficulty);
halfCatchWidth = catcher.CatchWidth * 0.5f;
// We're only using 80% of the catcher's width to simulate imperfect gameplay.
halfCatchWidth *= 0.8f;
}
protected override DifficultyAttributes Calculate(IBeatmap beatmap, Mod[] mods, double timeRate)
{
if (!beatmap.HitObjects.Any())
{
return(new CatchDifficultyAttributes(mods, 0));
}
var catcher = new CatcherArea.Catcher(beatmap.BeatmapInfo.BaseDifficulty);
float halfCatchWidth = catcher.CatchWidth * 0.5f;
var difficultyHitObjects = new List <CatchDifficultyHitObject>();
foreach (var hitObject in beatmap.HitObjects)
{
switch (hitObject)
{
// We want to only consider fruits that contribute to the combo. Droplets are addressed as accuracy and spinners are not relevant for "skill" calculations.
case Fruit fruit:
difficultyHitObjects.Add(new CatchDifficultyHitObject(fruit, halfCatchWidth));
break;
case JuiceStream _:
difficultyHitObjects.AddRange(hitObject.NestedHitObjects.OfType <CatchHitObject>().Where(o => !(o is TinyDroplet)).Select(o => new CatchDifficultyHitObject(o, halfCatchWidth)));
break;
}
}
difficultyHitObjects.Sort((a, b) => a.BaseHitObject.StartTime.CompareTo(b.BaseHitObject.StartTime));
if (!calculateStrainValues(difficultyHitObjects, timeRate))
{
return(new CatchDifficultyAttributes(mods, 0));
}
// this is the same as osu!, so there's potential to share the implementation... maybe
double preempt = BeatmapDifficulty.DifficultyRange(beatmap.BeatmapInfo.BaseDifficulty.ApproachRate, 1800, 1200, 450) / timeRate;
double starRating = Math.Sqrt(calculateDifficulty(difficultyHitObjects, timeRate)) * star_scaling_factor;
return(new CatchDifficultyAttributes(mods, starRating)
{
ApproachRate = preempt > 1200.0 ? -(preempt - 1800.0) / 120.0 : -(preempt - 1200.0) / 150.0 + 5.0,
MaxCombo = difficultyHitObjects.Count
});
}
protected override IEnumerable <DifficultyHitObject> CreateDifficultyHitObjects(IBeatmap beatmap, double clockRate)
{
float halfCatchWidth;
using (var catcher = new CatcherArea.Catcher(beatmap.BeatmapInfo.BaseDifficulty))
{
halfCatchWidth = catcher.CatchWidth * 0.5f;
halfCatchWidth *= 0.8f; // We're only using 80% of the catcher's width to simulate imperfect gameplay.
}
CatchHitObject lastObject = null;
foreach (var hitObject in beatmap.HitObjects.OfType <CatchHitObject>())
{
if (lastObject == null)
{
lastObject = hitObject;
continue;
}
switch (hitObject)
{
// We want to only consider fruits that contribute to the combo. Droplets are addressed as accuracy and spinners are not relevant for "skill" calculations.
case Fruit fruit:
yield return(new CatchDifficultyHitObject(fruit, lastObject, clockRate, halfCatchWidth));
lastObject = hitObject;
break;
case JuiceStream _:
foreach (var nested in hitObject.NestedHitObjects.OfType <CatchHitObject>().Where(o => !(o is TinyDroplet)))
{
yield return(new CatchDifficultyHitObject(nested, lastObject, clockRate, halfCatchWidth));
lastObject = nested;
}
break;
}
}
}
public MouseInputHelper(CatchPlayfield playfield)
{
catcher = playfield.CatcherArea.MovableCatcher;
RelativeSizeAxes = Axes.Both;
}