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osu-lazer/osu.Game.Rulesets.Osu/Mods/OsuModFreezeFrame.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;
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using osu.Framework.Graphics;
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using osu.Framework.Localisation;
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using osu.Game.Beatmaps;
using osu.Game.Rulesets.Mods;
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using osu.Game.Rulesets.Objects.Drawables;
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using osu.Game.Rulesets.Osu.Objects;
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using osu.Game.Rulesets.Osu.Objects.Drawables;
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namespace osu.Game.Rulesets.Osu.Mods
{
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public class OsuModFreezeFrame : Mod, IApplicableToDrawableHitObject, IApplicableToBeatmap
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{
public override string Name => "Freeze Frame";
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public override string Acronym => "FR";
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public override double ScoreMultiplier => 1;
public override LocalisableString Description => "Burn the notes into your memory.";
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//Alters the transforms of the approach circles, breaking the effects of these mods.
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public override Type[] IncompatibleMods => new[] { typeof(OsuModApproachDifferent) };
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public override ModType Type => ModType.Fun;
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//mod breaks normal approach circle preempt
private double originalPreempt;
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public void ApplyToBeatmap(IBeatmap beatmap)
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{
var firstHitObject = beatmap.HitObjects.OfType<OsuHitObject>().FirstOrDefault();
if (firstHitObject == null)
return;
double lastNewComboTime = 0;
originalPreempt = firstHitObject.TimePreempt;
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foreach (var obj in beatmap.HitObjects.OfType<OsuHitObject>())
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{
if (obj.NewCombo) { lastNewComboTime = obj.StartTime; }
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applyFadeInAdjustment(obj);
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}
void applyFadeInAdjustment(OsuHitObject osuObject)
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{
osuObject.TimePreempt += osuObject.StartTime - lastNewComboTime;
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foreach (var nested in osuObject.NestedHitObjects.OfType<OsuHitObject>())
{
switch (nested)
{
//Freezing the SliderTicks doesnt play well with snaking sliders
case SliderTick:
//SliderRepeat wont layer correctly if preempt is changed.
case SliderRepeat:
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break;
default:
applyFadeInAdjustment(nested);
break;
}
}
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}
}
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public void ApplyToDrawableHitObject(DrawableHitObject drawableObject)
{
drawableObject.ApplyCustomUpdateState += (drawableHitObject, _) =>
{
if (drawableHitObject is not DrawableHitCircle drawableHitCircle) return;
var hitCircle = drawableHitCircle.HitObject;
var approachCircle = drawableHitCircle.ApproachCircle;
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// Reapply scale, ensuring the AR isn't changed due to the new preempt.
approachCircle.ClearTransforms(targetMember: nameof(approachCircle.Scale));
approachCircle.ScaleTo(4 * (float)(hitCircle.TimePreempt / originalPreempt));
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using (drawableHitCircle.ApproachCircle.BeginAbsoluteSequence(hitCircle.StartTime - hitCircle.TimePreempt))
approachCircle.ScaleTo(1, hitCircle.TimePreempt).Then().Expire();
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};
}
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}
}