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, }); }