osu/osu.Game.Rulesets.Catch/Objects/JuiceStream.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.Collections.Generic;
using System.Linq;
using osu.Game.Audio;
using osu.Game.Beatmaps;
using osu.Game.Beatmaps.ControlPoints;
using osu.Game.Rulesets.Catch.UI;
using osu.Game.Rulesets.Judgements;
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using osu.Game.Rulesets.Objects;
using osu.Game.Rulesets.Objects.Types;
namespace osu.Game.Rulesets.Catch.Objects
{
public class JuiceStream : CatchHitObject, IHasCurve
{
/// <summary>
/// Positional distance that results in a duration of one second, before any speed adjustments.
/// </summary>
private const float base_scoring_distance = 100;
public override Judgement CreateJudgement() => new IgnoreJudgement();
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public int RepeatCount { get; set; }
public double Velocity;
public double TickDistance;
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/// <summary>
/// The length of one span of this <see cref="JuiceStream"/>.
/// </summary>
public double SpanDuration => Duration / this.SpanCount();
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protected override void ApplyDefaultsToSelf(ControlPointInfo controlPointInfo, BeatmapDifficulty difficulty)
{
base.ApplyDefaultsToSelf(controlPointInfo, difficulty);
TimingControlPoint timingPoint = controlPointInfo.TimingPointAt(StartTime);
DifficultyControlPoint difficultyPoint = controlPointInfo.DifficultyPointAt(StartTime);
double scoringDistance = base_scoring_distance * difficulty.SliderMultiplier * difficultyPoint.SpeedMultiplier;
Velocity = scoringDistance / timingPoint.BeatLength;
TickDistance = scoringDistance / difficulty.SliderTickRate;
}
protected override void CreateNestedHitObjects()
{
base.CreateNestedHitObjects();
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var tickSamples = Samples.Select(s => new HitSampleInfo
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{
Bank = s.Bank,
Name = @"slidertick",
Volume = s.Volume
}).ToList();
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SliderEventDescriptor? lastEvent = null;
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foreach (var e in SliderEventGenerator.Generate(StartTime, SpanDuration, Velocity, TickDistance, Path.Distance, this.SpanCount(), LegacyLastTickOffset))
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{
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// generate tiny droplets since the last point
if (lastEvent != null)
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{
double sinceLastTick = e.Time - lastEvent.Value.Time;
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if (sinceLastTick > 80)
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{
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double timeBetweenTiny = sinceLastTick;
while (timeBetweenTiny > 100)
timeBetweenTiny /= 2;
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for (double t = timeBetweenTiny; t < sinceLastTick; t += timeBetweenTiny)
{
AddNested(new TinyDroplet
{
Samples = tickSamples,
StartTime = t + lastEvent.Value.Time,
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X = X + Path.PositionAt(
lastEvent.Value.PathProgress + (t / sinceLastTick) * (e.PathProgress - lastEvent.Value.PathProgress)).X / CatchPlayfield.BASE_WIDTH,
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});
}
}
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}
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// this also includes LegacyLastTick and this is used for TinyDroplet generation above.
// this means that the final segment of TinyDroplets are increasingly mistimed where LegacyLastTickOffset is being applied.
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lastEvent = e;
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switch (e.Type)
{
case SliderEventType.Tick:
AddNested(new Droplet
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{
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Samples = tickSamples,
StartTime = e.Time,
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X = X + Path.PositionAt(e.PathProgress).X / CatchPlayfield.BASE_WIDTH,
});
break;
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case SliderEventType.Head:
case SliderEventType.Tail:
case SliderEventType.Repeat:
AddNested(new Fruit
{
Samples = Samples,
StartTime = e.Time,
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X = X + Path.PositionAt(e.PathProgress).X / CatchPlayfield.BASE_WIDTH,
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});
break;
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}
}
}
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public double EndTime
{
get => StartTime + this.SpanCount() * Path.Distance / Velocity;
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set => throw new System.NotSupportedException($"Adjust via {nameof(RepeatCount)} instead"); // can be implemented if/when needed.
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}
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public float EndX => X + this.CurvePositionAt(1).X / CatchPlayfield.BASE_WIDTH;
public double Duration => EndTime - StartTime;
private readonly SliderPath path = new SliderPath();
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public SliderPath Path
{
get => path;
set
{
path.ControlPoints.Clear();
path.ExpectedDistance.Value = null;
if (value != null)
{
path.ControlPoints.AddRange(value.ControlPoints.Select(c => new PathControlPoint(c.Position.Value, c.Type.Value)));
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path.ExpectedDistance.Value = value.ExpectedDistance.Value;
}
}
}
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public double Distance => Path.Distance;
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public List<IList<HitSampleInfo>> NodeSamples { get; set; } = new List<IList<HitSampleInfo>>();
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public double? LegacyLastTickOffset { get; set; }
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}
}