// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence. // See the LICENCE file in the repository root for full licence text. using osu.Game.Database; namespace osu.Game.Beatmaps { public class BeatmapDifficulty : IHasPrimaryKey { /// <summary> /// The default value used for all difficulty settings except <see cref="SliderMultiplier"/> and <see cref="SliderTickRate"/>. /// </summary> public const float DEFAULT_DIFFICULTY = 5; public int ID { get; set; } public float DrainRate { get; set; } = DEFAULT_DIFFICULTY; public float CircleSize { get; set; } = DEFAULT_DIFFICULTY; public float OverallDifficulty { get; set; } = DEFAULT_DIFFICULTY; private float? approachRate; public float ApproachRate { get => approachRate ?? OverallDifficulty; set => approachRate = value; } public double SliderMultiplier { get; set; } = 1; public double SliderTickRate { get; set; } = 1; /// <summary> /// Returns a shallow-clone of this <see cref="BeatmapDifficulty"/>. /// </summary> public BeatmapDifficulty Clone() => (BeatmapDifficulty)MemberwiseClone(); /// <summary> /// Maps a difficulty value [0, 10] to a two-piece linear range of values. /// </summary> /// <param name="difficulty">The difficulty value to be mapped.</param> /// <param name="min">Minimum of the resulting range which will be achieved by a difficulty value of 0.</param> /// <param name="mid">Midpoint of the resulting range which will be achieved by a difficulty value of 5.</param> /// <param name="max">Maximum of the resulting range which will be achieved by a difficulty value of 10.</param> /// <returns>Value to which the difficulty value maps in the specified range.</returns> public static double DifficultyRange(double difficulty, double min, double mid, double max) { if (difficulty > 5) return mid + (max - mid) * (difficulty - 5) / 5; if (difficulty < 5) return mid - (mid - min) * (5 - difficulty) / 5; return mid; } /// <summary> /// Maps a difficulty value [0, 10] to a two-piece linear range of values. /// </summary> /// <param name="difficulty">The difficulty value to be mapped.</param> /// <param name="range">The values that define the two linear ranges. /// <list type="table"> /// <item> /// <term>od0</term> /// <description>Minimum of the resulting range which will be achieved by a difficulty value of 0.</description> /// </item> /// <item> /// <term>od5</term> /// <description>Midpoint of the resulting range which will be achieved by a difficulty value of 5.</description> /// </item> /// <item> /// <term>od10</term> /// <description>Maximum of the resulting range which will be achieved by a difficulty value of 10.</description> /// </item> /// </list> /// </param> /// <returns>Value to which the difficulty value maps in the specified range.</returns> public static double DifficultyRange(double difficulty, (double od0, double od5, double od10) range) => DifficultyRange(difficulty, range.od0, range.od5, range.od10); } }