mirror of https://github.com/ppy/osu
80 lines
3.4 KiB
C#
80 lines
3.4 KiB
C#
// 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);
|
|
}
|
|
}
|