osu/osu.Game.Rulesets.Osu/Objects/Slider.cs

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// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using OpenTK;
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using osu.Game.Rulesets.Objects.Types;
using System;
using System.Collections.Generic;
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using osu.Game.Rulesets.Objects;
using System.Linq;
using osu.Game.Audio;
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using osu.Game.Beatmaps;
using osu.Game.Beatmaps.ControlPoints;
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namespace osu.Game.Rulesets.Osu.Objects
{
public class Slider : OsuHitObject, IHasCurve
{
/// <summary>
/// Scoring distance with a speed-adjusted beat length of 1 second.
/// </summary>
private const float base_scoring_distance = 100;
public readonly SliderCurve Curve = new SliderCurve();
public double EndTime => StartTime + RepeatCount * Curve.Distance / Velocity;
public double Duration => EndTime - StartTime;
public override Vector2 EndPosition => PositionAt(1);
public List<Vector2> ControlPoints
{
get { return Curve.ControlPoints; }
set { Curve.ControlPoints = value; }
}
public CurveType CurveType
{
get { return Curve.CurveType; }
set { Curve.CurveType = value; }
}
public double Distance
{
get { return Curve.Distance; }
set { Curve.Distance = value; }
}
public List<SampleInfoList> RepeatSamples { get; set; } = new List<SampleInfoList>();
public int RepeatCount { get; set; } = 1;
private int stackHeight;
public override int StackHeight
{
get { return stackHeight; }
set
{
stackHeight = value;
Curve.Offset = StackOffset;
}
}
public double Velocity;
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public double TickDistance;
public override void ApplyDefaults(ControlPointInfo controlPointInfo, BeatmapDifficulty difficulty)
{
base.ApplyDefaults(controlPointInfo, difficulty);
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TimingControlPoint timingPoint = controlPointInfo.TimingPointAt(StartTime);
DifficultyControlPoint difficultyPoint = controlPointInfo.DifficultyPointAt(StartTime);
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double scoringDistance = base_scoring_distance * difficulty.SliderMultiplier * difficultyPoint.SpeedMultiplier;
Velocity = scoringDistance / timingPoint.BeatLength;
TickDistance = scoringDistance / difficulty.SliderTickRate;
}
public Vector2 PositionAt(double progress) => Curve.PositionAt(ProgressAt(progress));
public double ProgressAt(double progress)
{
double p = progress * RepeatCount % 1;
if (RepeatAt(progress) % 2 == 1)
p = 1 - p;
return p;
}
public int RepeatAt(double progress) => (int)(progress * RepeatCount);
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public IEnumerable<SliderTick> Ticks
{
get
{
if (TickDistance == 0) yield break;
var length = Curve.Distance;
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var tickDistance = Math.Min(TickDistance, length);
var repeatDuration = length / Velocity;
var minDistanceFromEnd = Velocity * 0.01;
for (var repeat = 0; repeat < RepeatCount; repeat++)
{
var repeatStartTime = StartTime + repeat * repeatDuration;
var reversed = repeat % 2 == 1;
for (var d = tickDistance; d <= length; d += tickDistance)
{
if (d > length - minDistanceFromEnd)
break;
var distanceProgress = d / length;
var timeProgress = reversed ? 1 - distanceProgress : distanceProgress;
yield return new SliderTick
{
RepeatIndex = repeat,
StartTime = repeatStartTime + timeProgress * repeatDuration,
Position = Curve.PositionAt(distanceProgress),
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StackHeight = StackHeight,
Scale = Scale,
ComboColour = ComboColour,
Samples = new SampleInfoList(Samples.Select(s => new SampleInfo
{
Bank = s.Bank,
Name = @"slidertick",
Volume = s.Volume
}))
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};
}
}
}
}
}
}