protected override int GetMaxCombo(IBeatmap beatmap) => beatmap.GetMaxCombo();
protected override DifficultyAttributes CreateDifficultyAttributes(IBeatmap beatmap, Mod[] mods, Skill[] skills, double clockRate)
{
if (beatmap.HitObjects.Count == 0)
{
return new OsuDifficultyAttributes {
Mods = mods
}
}
;
double aimRating = Math.Sqrt(skills[0].DifficultyValue()) * difficulty_multiplier;
double aimRatingNoSliders = Math.Sqrt(skills[1].DifficultyValue()) * difficulty_multiplier;
double speedRating = Math.Sqrt(skills[2].DifficultyValue()) * difficulty_multiplier;
double flashlightRating = Math.Sqrt(skills[3].DifficultyValue()) * difficulty_multiplier;
double sliderFactor = aimRating > 0 ? aimRatingNoSliders / aimRating : 1;
if (mods.Any(h => h is OsuModRelax))
{
speedRating = 0.0;
}
double baseAimPerformance = Math.Pow(5 * Math.Max(1, aimRating / 0.0675) - 4, 3) / 100000;
double baseSpeedPerformance = Math.Pow(5 * Math.Max(1, speedRating / 0.0675) - 4, 3) / 100000;
double baseFlashlightPerformance = 0.0;
if (mods.Any(h => h is OsuModFlashlight))
{
baseFlashlightPerformance = Math.Pow(flashlightRating, 2.0) * 25.0;
}
double basePerformance =
Math.Pow(
Math.Pow(baseAimPerformance, 1.1) +
Math.Pow(baseSpeedPerformance, 1.1) +
Math.Pow(baseFlashlightPerformance, 1.1), 1.0 / 1.1
);
double starRating = basePerformance > 0.00001 ? Math.Cbrt(1.12) * 0.027 * (Math.Cbrt(100000 / Math.Pow(2, 1 / 1.1) * basePerformance) + 4) : 0;
double preempt = IBeatmapDifficultyInfo.DifficultyRange(beatmap.Difficulty.ApproachRate, 1800, 1200, 450) / clockRate;
double drainRate = beatmap.Difficulty.DrainRate;
int maxCombo = beatmap.GetMaxCombo();
int hitCirclesCount = beatmap.HitObjects.Count(h => h is HitCircle);
int sliderCount = beatmap.HitObjects.Count(h => h is Slider);
int spinnerCount = beatmap.HitObjects.Count(h => h is Spinner);
return(new OsuDifficultyAttributes
{
StarRating = starRating,
Mods = mods,
AimDifficulty = aimRating,
SpeedDifficulty = speedRating,
FlashlightDifficulty = flashlightRating,
SliderFactor = sliderFactor,
ApproachRate = preempt > 1200 ? (1800 - preempt) / 120 : (1200 - preempt) / 150 + 5,
OverallDifficulty = (80 - hitWindowGreat) / 6,
DrainRate = drainRate,
MaxCombo = maxCombo,
HitCircleCount = hitCirclesCount,
SliderCount = sliderCount,
SpinnerCount = spinnerCount,
});
}