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osu-lazer/osu.Game.Rulesets.Mania/Mods/ManiaModRandom.cs

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// 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.
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using System;
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using System.Linq;
using osu.Framework.Extensions.IEnumerableExtensions;
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using osu.Framework.Localisation;
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using osu.Framework.Utils;
using osu.Game.Beatmaps;
using osu.Game.Rulesets.Mania.Beatmaps;
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using osu.Game.Rulesets.Mania.Objects;
using osu.Game.Rulesets.Mods;
namespace osu.Game.Rulesets.Mania.Mods
{
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public class ManiaModRandom : ModRandom, IApplicableToBeatmap
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{
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public override LocalisableString Description => @"Shuffle around the keys!";
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public void ApplyToBeatmap(IBeatmap beatmap)
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{
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Seed.Value ??= RNG.Next();
var rng = new Random((int)Seed.Value);
int availableColumns = ((ManiaBeatmap)beatmap).TotalColumns;
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var shuffledColumns = Enumerable.Range(0, availableColumns).OrderBy(_ => rng.Next()).ToList();
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beatmap.HitObjects.OfType<ManiaHitObject>().ForEach(h => h.Column = shuffledColumns[h.Column]);
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}
}
}