mirror of https://github.com/ppy/osu
42 lines
2.0 KiB
C#
42 lines
2.0 KiB
C#
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
|
|
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
|
|
|
|
using SQLite.Net.Attributes;
|
|
|
|
namespace osu.Game.Database
|
|
{
|
|
public class BeatmapDifficulty
|
|
{
|
|
/// <summary>
|
|
/// The default value used for all difficulty settings except <see cref="SliderMultiplier"/> and <see cref="SliderTickRate"/>.
|
|
/// </summary>
|
|
public const float DEFAULT_DIFFICULTY = 5;
|
|
|
|
[PrimaryKey, AutoIncrement]
|
|
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;
|
|
public float ApproachRate { get; set; } = DEFAULT_DIFFICULTY;
|
|
public float SliderMultiplier { get; set; } = 1;
|
|
public float SliderTickRate { get; set; } = 1;
|
|
|
|
/// <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;
|
|
}
|
|
}
|
|
}
|