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151 lines
5.7 KiB
C#
151 lines
5.7 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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using System.Collections.Generic;
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using System.Linq;
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using osu.Game.Audio;
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using osu.Game.Beatmaps;
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using osu.Game.Beatmaps.ControlPoints;
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using osu.Game.Rulesets.Catch.UI;
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using osu.Game.Rulesets.Judgements;
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using osu.Game.Rulesets.Objects;
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using osu.Game.Rulesets.Objects.Types;
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namespace osu.Game.Rulesets.Catch.Objects
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{
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public class JuiceStream : CatchHitObject, IHasCurve
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{
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/// <summary>
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/// Positional distance that results in a duration of one second, before any speed adjustments.
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/// </summary>
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private const float base_scoring_distance = 100;
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public override Judgement CreateJudgement() => new IgnoreJudgement();
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public int RepeatCount { get; set; }
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public double Velocity { get; private set; }
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public double TickDistance { get; private set; }
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/// <summary>
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/// The length of one span of this <see cref="JuiceStream"/>.
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/// </summary>
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public double SpanDuration => Duration / this.SpanCount();
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protected override void ApplyDefaultsToSelf(ControlPointInfo controlPointInfo, BeatmapDifficulty difficulty)
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{
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base.ApplyDefaultsToSelf(controlPointInfo, difficulty);
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TimingControlPoint timingPoint = controlPointInfo.TimingPointAt(StartTime);
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DifficultyControlPoint difficultyPoint = controlPointInfo.DifficultyPointAt(StartTime);
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double scoringDistance = base_scoring_distance * difficulty.SliderMultiplier * difficultyPoint.SpeedMultiplier;
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Velocity = scoringDistance / timingPoint.BeatLength;
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TickDistance = scoringDistance / difficulty.SliderTickRate;
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}
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protected override void CreateNestedHitObjects()
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{
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base.CreateNestedHitObjects();
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var tickSamples = Samples.Select(s => new HitSampleInfo
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{
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Bank = s.Bank,
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Name = @"slidertick",
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Volume = s.Volume
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}).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
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if (lastEvent != null)
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{
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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;
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while (timeBetweenTiny > 100)
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timeBetweenTiny /= 2;
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for (double t = timeBetweenTiny; t < sinceLastTick; t += timeBetweenTiny)
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{
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AddNested(new TinyDroplet
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{
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Samples = tickSamples,
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StartTime = t + lastEvent.Value.Time,
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X = X + Path.PositionAt(
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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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}
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}
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// this also includes LegacyLastTick and this is used for TinyDroplet generation above.
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// 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)
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{
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case SliderEventType.Tick:
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AddNested(new Droplet
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{
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Samples = tickSamples,
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StartTime = e.Time,
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X = X + Path.PositionAt(e.PathProgress).X / CatchPlayfield.BASE_WIDTH,
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});
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break;
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case SliderEventType.Head:
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case SliderEventType.Tail:
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case SliderEventType.Repeat:
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AddNested(new Fruit
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{
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Samples = Samples,
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StartTime = e.Time,
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X = X + Path.PositionAt(e.PathProgress).X / CatchPlayfield.BASE_WIDTH,
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});
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break;
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}
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}
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}
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public double EndTime
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{
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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;
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public double Duration => EndTime - StartTime;
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private readonly SliderPath path = new SliderPath();
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public SliderPath Path
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{
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get => path;
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set
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{
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path.ControlPoints.Clear();
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path.ExpectedDistance.Value = null;
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if (value != null)
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{
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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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}
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}
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}
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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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}
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}
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