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Implement inverse of IBeatmapDifficultyInfo.DifficultyRange()

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Bartłomiej Dach 2023-12-14 19:00:00 +01:00
parent 555559c5c1
commit 24e31f7d91
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osu.Game/Beatmaps/IBeatmapDifficultyInfo.cs
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@ -92,5 +92,21 @@ namespace osu.Game.Beatmaps
/// <returns>Value to which the difficulty value maps in the specified range.</returns>
static double DifficultyRange(double difficulty, (double od0, double od5, double od10) range)
=> DifficultyRange(difficulty, range.od0, range.od5, range.od10);
/// <summary>
/// Inverse function to <see cref="DifficultyRange(double,double,double,double)"/>.
/// Maps a value returned by the function above back to the difficulty that produced it.
/// </summary>
/// <param name="difficultyValue">The difficulty-dependent value to be unmapped.</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>
static double InverseDifficultyRange(double difficultyValue, double min, double mid, double max)
{
return difficultyValue >= mid
? (difficultyValue - mid) / (max - mid) * 5 + 5
: (difficultyValue - mid) / (mid - min) * 5 + 5;
}
}
}