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osu-lazer/osu.Game/Rulesets/Difficulty/DifficultyCalculator.cs

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// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System.Collections.Generic;
using System.Linq;
using osu.Framework.Extensions.IEnumerableExtensions;
using osu.Framework.Timing;
using osu.Game.Beatmaps;
using osu.Game.Rulesets.Mods;
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namespace osu.Game.Rulesets.Difficulty
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{
public abstract class DifficultyCalculator
{
protected readonly IBeatmap Beatmap;
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protected readonly Mod[] Mods;
protected double TimeRate { get; private set; } = 1;
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protected DifficultyCalculator(IBeatmap beatmap, Mod[] mods = null)
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{
Beatmap = beatmap;
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Mods = mods ?? new Mod[0];
ApplyMods(Mods);
}
protected virtual void ApplyMods(Mod[] mods)
{
var clock = new StopwatchClock();
mods.OfType<IApplicableToClock>().ForEach(m => m.ApplyToClock(clock));
TimeRate = clock.Rate;
}
protected virtual void PreprocessHitObjects()
{
}
public abstract double Calculate(Dictionary<string, double> categoryDifficulty = null);
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}
}