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Code Issues Releases Wiki Activity

Add difficulty calculation

Browse Source 
Adds base classes for difficulty calculations, hooks them up with
carousel container, and adds a port of the osu difficulty calculator.
This commit is contained in:
Thomas Müller 2017-02-19 17:41:51 +01:00
parent 5721e7f2d2
commit 417f146386
29 changed files with 587 additions and 31 deletions
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2
osu-framework

@ -1 +1 @@
Subproject commit 697d8b7e9530ba7914d9c78012329ce1559e3681
Subproject commit f370d4d6ef9f975932324d30272dfffc929a6622

27
osu.Game.Modes.Catch/CatchDifficultyCalculator.cs Normal file
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@ -0,0 +1,27 @@
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using osu.Game.Beatmaps;
using osu.Game.Modes.Catch.Objects;
using osu.Game.Modes.Objects;
using System;
using System.Collections.Generic;
namespace osu.Game.Modes.Catch
{
public class CatchDifficultyCalculator : DifficultyCalculator<CatchBaseHit>
{
protected override PlayMode PlayMode => PlayMode.Catch;
public CatchDifficultyCalculator(Beatmap beatmap) : base(beatmap)
{
}
protected override HitObjectConverter<CatchBaseHit> Converter => new CatchConverter();
protected override double ComputeDifficulty(Dictionary<String, String> categoryDifficulty)
{
return 0;
}
}
}

5
osu.Game.Modes.Catch/CatchRuleset.cs
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@ -1,14 +1,13 @@
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System.Collections.Generic;
using osu.Game.Graphics;
using osu.Game.Modes.Catch.UI;
using osu.Game.Modes.Objects;
using osu.Game.Modes.Osu.Objects;
using osu.Game.Modes.Osu.UI;
using osu.Game.Modes.UI;
using osu.Game.Beatmaps;
using System;
namespace osu.Game.Modes.Catch
{
@ -25,5 +24,7 @@ namespace osu.Game.Modes.Catch
public override ScoreProcessor CreateScoreProcessor(int hitObjectCount) => null;
public override HitObjectParser CreateHitObjectParser() => new NullHitObjectParser();
public override DifficultyCalculator CreateDifficultyCalculator(Beatmap beatmap) => new CatchDifficultyCalculator(beatmap);
}
}

1
osu.Game.Modes.Catch/osu.Game.Modes.Catch.csproj
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@ -47,6 +47,7 @@
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="CatchDifficultyCalculator.cs" />
<Compile Include="Objects\CatchBaseHit.cs" />
<Compile Include="Objects\CatchConverter.cs" />
<Compile Include="Objects\Drawable\DrawableFruit.cs" />

30
osu.Game.Modes.Mania/ManiaDifficultyCalculator.cs Normal file
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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 osu.Game.Beatmaps;
using osu.Game.Modes.Mania.Objects;
using osu.Game.Modes.Objects;
using System;
using System.Collections.Generic;
namespace osu.Game.Modes.Mania
{
public class ManiaDifficultyCalculator : DifficultyCalculator<ManiaBaseHit>
{
protected override PlayMode PlayMode => PlayMode.Mania;
private int columns;
public ManiaDifficultyCalculator(Beatmap beatmap, int columns = 5) : base(beatmap)
{
this.columns = columns;
}
protected override HitObjectConverter<ManiaBaseHit> Converter => new ManiaConverter(columns);
protected override double ComputeDifficulty(Dictionary<String, String> categoryDifficulty)
{
return 0;
}
}
}

6
osu.Game.Modes.Mania/ManiaRuleset.cs
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@ -1,15 +1,13 @@
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System.Collections.Generic;
using osu.Game.Graphics;
using osu.Game.Modes.Mania.UI;
using osu.Game.Modes.Objects;
using osu.Game.Modes.Osu;
using osu.Game.Modes.Osu.Objects;
using osu.Game.Modes.Osu.UI;
using osu.Game.Modes.UI;
using osu.Game.Beatmaps;
using System;
namespace osu.Game.Modes.Mania
{
@ -26,5 +24,7 @@ namespace osu.Game.Modes.Mania
public override ScoreProcessor CreateScoreProcessor(int hitObjectCount) => null;
public override HitObjectParser CreateHitObjectParser() => new NullHitObjectParser();
public override DifficultyCalculator CreateDifficultyCalculator(Beatmap beatmap) => new ManiaDifficultyCalculator(beatmap);
}
}

1
osu.Game.Modes.Mania/osu.Game.Modes.Mania.csproj
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@ -47,6 +47,7 @@
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="ManiaDifficultyCalculator.cs" />
<Compile Include="Objects\Drawable\DrawableNote.cs" />
<Compile Include="Objects\HoldNote.cs" />
<Compile Include="Objects\ManiaBaseHit.cs" />

2
osu.Game.Modes.Osu/Objects/Drawables/DrawableSpinner.cs
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@ -108,7 +108,7 @@ namespace osu.Game.Modes.Osu.Objects.Drawables
}
}
private Vector2 scaleToCircle => new Vector2(circle.Scale * circle.DrawWidth / DrawWidth) * 0.95f;
private Vector2 scaleToCircle => (circle.Scale * circle.DrawWidth / DrawWidth) * 0.95f;
private float spinsPerMinuteNeeded = 100 + (5 * 15); //TODO: read per-map OD and place it on the 5

3
osu.Game.Modes.Osu/Objects/HitCircle.cs
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@ -1,9 +1,12 @@
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System;
namespace osu.Game.Modes.Osu.Objects
{
public class HitCircle : OsuHitObject
{
public override HitObjectType Type => HitObjectType.Circle;
}
}

16
osu.Game.Modes.Osu/Objects/OsuHitObject.cs
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@ -25,6 +25,8 @@ namespace osu.Game.Modes.Osu.Objects
public float Scale { get; set; } = 1;
public abstract HitObjectType Type { get; }
public override void SetDefaultsFromBeatmap(Beatmap beatmap)
{
base.SetDefaultsFromBeatmap(beatmap);
@ -36,14 +38,12 @@ namespace osu.Game.Modes.Osu.Objects
[Flags]
public enum HitObjectType
{
Circle = 1,
Slider = 2,
NewCombo = 4,
CircleNewCombo = 5,
SliderNewCombo = 6,
Spinner = 8,
Circle = 1 << 0,
Slider = 1 << 1,
NewCombo = 1 << 2,
Spinner = 1 << 3,
ColourHax = 122,
Hold = 128,
ManiaLong = 128,
Hold = 1 << 7,
SliderTick = 1 << 8,
}
}

200
osu.Game.Modes.Osu/Objects/OsuHitObjectDifficulty.cs Normal file
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@ -0,0 +1,200 @@
// 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;
using System;
using System.Diagnostics;
using System.Linq;
namespace osu.Game.Modes.Osu.Objects
{
class OsuHitObjectDifficulty
{
/// <summary>
/// Factor by how much speed / aim strain decays per second.
/// </summary>
/// <remarks>
/// These values are results of tweaking a lot and taking into account general feedback.
/// Opinionated observation: Speed is easier to maintain than accurate jumps.
/// </remarks>
internal static readonly double[] DECAY_BASE = { 0.3, 0.15 };
/// <summary>
/// Pseudo threshold values to distinguish between "singles" and "streams"
/// </summary>
/// <remarks>
/// Of course the border can not be defined clearly, therefore the algorithm has a smooth transition between those values.
/// They also are based on tweaking and general feedback.
/// </remarks>
private const double STREAM_SPACING_TRESHOLD = 110,
SINGLE_SPACING_TRESHOLD = 125;
/// <summary>
/// Scaling values for weightings to keep aim and speed difficulty in balance.
/// </summary>
/// <remarks>
/// Found from testing a very large map pool (containing all ranked maps) and keeping the average values the same.
/// </remarks>
private static readonly double[] SPACING_WEIGHT_SCALING = { 1400, 26.25 };
/// <summary>
/// Almost the normed diameter of a circle (104 osu pixel). That is -after- position transforming.
/// </summary>
private const double ALMOST_DIAMETER = 90;
internal OsuHitObject BaseHitObject;
internal double[] Strains = { 1, 1 };
internal int MaxCombo = 1;
private Vector2 normalizedStartPosition;
private Vector2 normalizedEndPosition;
private float lazySliderLength;
internal OsuHitObjectDifficulty(OsuHitObject baseHitObject)
{
BaseHitObject = baseHitObject;
float circleRadius = baseHitObject.Scale * 64;
Slider slider = BaseHitObject as Slider;
if (slider != null)
MaxCombo += slider.Ticks.Count();
// We will scale everything by this factor, so we can assume a uniform CircleSize among beatmaps.
float scalingFactor = (52.0f / circleRadius);
if (circleRadius < 30)
{
float smallCircleBonus = Math.Min(30.0f - circleRadius, 5.0f) / 50.0f;
scalingFactor *= 1.0f + smallCircleBonus;
}
normalizedStartPosition = BaseHitObject.StackedPosition * scalingFactor;
lazySliderLength = 0;
// Calculate approximation of lazy movement on the slider
if (slider != null)
{
float sliderFollowCircleRadius = circleRadius * 3; // Not sure if this is correct, but here we do not need 100% exact values. This comes pretty darn close in my tests.
// For simplifying this step we use actual osu! coordinates and simply scale the length, that we obtain by the ScalingFactor later
Vector2 cursorPos = baseHitObject.StackedPosition;
Action<Vector2> addSliderVertex = delegate (Vector2 pos)
{
Vector2 difference = pos - cursorPos;
float distance = difference.Length;
// Did we move away too far?
if (distance > sliderFollowCircleRadius)
{
// Yep, we need to move the cursor
difference.Normalize(); // Obtain the direction of difference. We do no longer need the actual difference
distance -= sliderFollowCircleRadius;
cursorPos += difference * distance; // We move the cursor just as far as needed to stay in the follow circle
lazySliderLength += distance;
}
};
// Actual computation of the first lazy curve
foreach (var tick in slider.Ticks)
addSliderVertex(tick.StackedPosition);
addSliderVertex(baseHitObject.StackedEndPosition);
lazySliderLength *= scalingFactor;
normalizedEndPosition = cursorPos * scalingFactor;
}
// We have a normal HitCircle or a spinner
else
normalizedEndPosition = normalizedStartPosition;
}
internal void CalculateStrains(OsuHitObjectDifficulty previousHitObject, double timeRate)
{
calculateSpecificStrain(previousHitObject, OsuDifficultyCalculator.DifficultyType.Speed, timeRate);
calculateSpecificStrain(previousHitObject, OsuDifficultyCalculator.DifficultyType.Aim, timeRate);
}
// Caution: The subjective values are strong with this one
private static double spacingWeight(double distance, OsuDifficultyCalculator.DifficultyType type)
{
switch (type)
{
case OsuDifficultyCalculator.DifficultyType.Speed:
if (distance > SINGLE_SPACING_TRESHOLD)
return 2.5;
else if (distance > STREAM_SPACING_TRESHOLD)
return 1.6 + 0.9 * (distance - STREAM_SPACING_TRESHOLD) / (SINGLE_SPACING_TRESHOLD - STREAM_SPACING_TRESHOLD);
else if (distance > ALMOST_DIAMETER)
return 1.2 + 0.4 * (distance - ALMOST_DIAMETER) / (STREAM_SPACING_TRESHOLD - ALMOST_DIAMETER);
else if (distance > ALMOST_DIAMETER / 2)
return 0.95 + 0.25 * (distance - (ALMOST_DIAMETER / 2)) / (ALMOST_DIAMETER / 2);
else
return 0.95;
case OsuDifficultyCalculator.DifficultyType.Aim:
return Math.Pow(distance, 0.99);
}
Debug.Assert(false, "Invalid osu difficulty hit object type.");
return 0;
}
private void calculateSpecificStrain(OsuHitObjectDifficulty previousHitObject, OsuDifficultyCalculator.DifficultyType type, double timeRate)
{
double addition = 0;
double timeElapsed = (BaseHitObject.StartTime - previousHitObject.BaseHitObject.StartTime) / timeRate;
double decay = Math.Pow(DECAY_BASE[(int)type], timeElapsed / 1000);
if (BaseHitObject.Type == HitObjectType.Spinner)
{
// Do nothing for spinners
}
else if (BaseHitObject.Type == HitObjectType.Slider)
{
switch (type)
{
case OsuDifficultyCalculator.DifficultyType.Speed:
// For speed strain we treat the whole slider as a single spacing entity, since "Speed" is about how hard it is to click buttons fast.
// The spacing weight exists to differentiate between being able to easily alternate or having to single.
addition =
spacingWeight(previousHitObject.lazySliderLength +
DistanceTo(previousHitObject), type) *
SPACING_WEIGHT_SCALING[(int)type];
break;
case OsuDifficultyCalculator.DifficultyType.Aim:
// For Aim strain we treat each slider segment and the jump after the end of the slider as separate jumps, since movement-wise there is no difference
// to multiple jumps.
addition =
(
spacingWeight(previousHitObject.lazySliderLength, type) +
spacingWeight(DistanceTo(previousHitObject), type)
) *
SPACING_WEIGHT_SCALING[(int)type];
break;
}
}
else if (BaseHitObject.Type == HitObjectType.Circle)
{
addition = spacingWeight(DistanceTo(previousHitObject), type) * SPACING_WEIGHT_SCALING[(int)type];
}
// Scale addition by the time, that elapsed. Filter out HitObjects that are too close to be played anyway to avoid crazy values by division through close to zero.
// You will never find maps that require this amongst ranked maps.
addition /= Math.Max(timeElapsed, 50);
Strains[(int)type] = previousHitObject.Strains[(int)type] * decay + addition;
}
internal double DistanceTo(OsuHitObjectDifficulty other)
{
// Scale the distance by circle size.
return (normalizedStartPosition - other.normalizedEndPosition).Length;
}
}
}

2
osu.Game.Modes.Osu/Objects/Slider.cs
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@ -110,6 +110,8 @@ namespace osu.Game.Modes.Osu.Objects
}
}
}
public override HitObjectType Type => HitObjectType.Slider;
}
public enum CurveTypes

2
osu.Game.Modes.Osu/Objects/SliderTick.cs
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@ -5,5 +5,7 @@ namespace osu.Game.Modes.Osu.Objects
public class SliderTick : OsuHitObject
{
public int RepeatIndex { get; set; }
public override HitObjectType Type => HitObjectType.SliderTick;
}
}

2
osu.Game.Modes.Osu/Objects/Spinner.cs
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@ -10,5 +10,7 @@ namespace osu.Game.Modes.Osu.Objects
public double Length;
public override double EndTime => StartTime + Length;
public override HitObjectType Type => HitObjectType.Spinner;
}
}

193
osu.Game.Modes.Osu/OsuDifficultyCalculator.cs Normal file
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@ -0,0 +1,193 @@
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using osu.Game.Beatmaps;
using osu.Game.Modes.Osu.Objects;
using System;
using System.Collections.Generic;
using osu.Game.Modes.Objects;
namespace osu.Game.Modes.Osu
{
public class OsuDifficultyCalculator : DifficultyCalculator<OsuHitObject>
{
private const double STAR_SCALING_FACTOR = 0.0675;
private const double EXTREME_SCALING_FACTOR = 0.5;
protected override PlayMode PlayMode => PlayMode.Osu;
/// <summary>
/// HitObjects are stored as a member variable.
/// </summary>
internal List<OsuHitObjectDifficulty> DifficultyHitObjects = new List<OsuHitObjectDifficulty>();
public OsuDifficultyCalculator(Beatmap beatmap) : base(beatmap)
{
}
protected override HitObjectConverter<OsuHitObject> Converter => new OsuHitObjectConverter();
protected override void PreprocessHitObjects()
{
foreach (var h in Objects)
if (h.Type == HitObjectType.Slider)
((Slider)h).Curve.Calculate();
}
protected override double ComputeDifficulty(Dictionary<String, String> categoryDifficulty)
{
// Fill our custom DifficultyHitObject class, that carries additional information
DifficultyHitObjects.Clear();
foreach (var hitObject in Objects)
DifficultyHitObjects.Add(new OsuHitObjectDifficulty(hitObject));
// Sort DifficultyHitObjects by StartTime of the HitObjects - just to make sure.
DifficultyHitObjects.Sort((a, b) => a.BaseHitObject.StartTime.CompareTo(b.BaseHitObject.StartTime));
if (!CalculateStrainValues()) return 0;
double speedDifficulty = CalculateDifficulty(DifficultyType.Speed);
double aimDifficulty = CalculateDifficulty(DifficultyType.Aim);
// OverallDifficulty is not considered in this algorithm and neither is HpDrainRate. That means, that in this form the algorithm determines how hard it physically is
// to play the map, assuming, that too much of an error will not lead to a death.
// It might be desirable to include OverallDifficulty into map difficulty, but in my personal opinion it belongs more to the weighting of the actual peformance
// and is superfluous in the beatmap difficulty rating.
// If it were to be considered, then I would look at the hit window of normal HitCircles only, since Sliders and Spinners are (almost) "free" 300s and take map length
// into account as well.
// The difficulty can be scaled by any desired metric.
// In osu!tp it gets squared to account for the rapid increase in difficulty as the limit of a human is approached. (Of course it also gets scaled afterwards.)
// It would not be suitable for a star rating, therefore:
// The following is a proposal to forge a star rating from 0 to 5. It consists of taking the square root of the difficulty, since by simply scaling the easier
// 5-star maps would end up with one star.
double speedStars = Math.Sqrt(speedDifficulty) * STAR_SCALING_FACTOR;
double aimStars = Math.Sqrt(aimDifficulty) * STAR_SCALING_FACTOR;
if (categoryDifficulty != null)
{
categoryDifficulty.Add("Aim", aimStars.ToString("0.00"));
categoryDifficulty.Add("Speed", speedStars.ToString("0.00"));
double hitWindow300 = 30/*HitObjectManager.HitWindow300*/ / TimeRate;
double preEmpt = 450/*HitObjectManager.PreEmpt*/ / TimeRate;
categoryDifficulty.Add("OD", (-(hitWindow300 - 80.0) / 6.0).ToString("0.00"));
categoryDifficulty.Add("AR", (preEmpt > 1200.0 ? -(preEmpt - 1800.0) / 120.0 : -(preEmpt - 1200.0) / 150.0 + 5.0).ToString("0.00"));
int maxCombo = 0;
foreach (OsuHitObjectDifficulty hitObject in DifficultyHitObjects)
maxCombo += hitObject.MaxCombo;
categoryDifficulty.Add("Max combo", maxCombo.ToString());
}
// Again, from own observations and from the general opinion of the community a map with high speed and low aim (or vice versa) difficulty is harder,
// than a map with mediocre difficulty in both. Therefore we can not just add both difficulties together, but will introduce a scaling that favors extremes.
double starRating = speedStars + aimStars + Math.Abs(speedStars - aimStars) * EXTREME_SCALING_FACTOR;
// Another approach to this would be taking Speed and Aim separately to a chosen power, which again would be equivalent. This would be more convenient if
// the hit window size is to be considered as well.
// Note: The star rating is tuned extremely tight! Airman (/b/104229) and Freedom Dive (/b/126645), two of the hardest ranked maps, both score ~4.66 stars.
// Expect the easier kind of maps that officially get 5 stars to obtain around 2 by this metric. The tutorial still scores about half a star.
// Tune by yourself as you please. ;)
return starRating;
}
protected bool CalculateStrainValues()
{
// Traverse hitObjects in pairs to calculate the strain value of NextHitObject from the strain value of CurrentHitObject and environment.
List<OsuHitObjectDifficulty>.Enumerator hitObjectsEnumerator = DifficultyHitObjects.GetEnumerator();
if (!hitObjectsEnumerator.MoveNext()) return false;
OsuHitObjectDifficulty currentHitObject = hitObjectsEnumerator.Current;
OsuHitObjectDifficulty nextHitObject;
// First hitObject starts at strain 1. 1 is the default for strain values, so we don't need to set it here. See DifficultyHitObject.
while (hitObjectsEnumerator.MoveNext())
{
nextHitObject = hitObjectsEnumerator.Current;
nextHitObject.CalculateStrains(currentHitObject, TimeRate);
currentHitObject = nextHitObject;
}
return true;
}
/// <summary>
/// In milliseconds. For difficulty calculation we will only look at the highest strain value in each time interval of size STRAIN_STEP.
/// This is to eliminate higher influence of stream over aim by simply having more HitObjects with high strain.
/// The higher this value, the less strains there will be, indirectly giving long beatmaps an advantage.
/// </summary>
protected const double STRAIN_STEP = 400;
/// <summary>
/// The weighting of each strain value decays to this number * it's previous value
/// </summary>
protected const double DECAY_WEIGHT = 0.9;
protected double CalculateDifficulty(DifficultyType type)
{
double actualStrainStep = STRAIN_STEP * TimeRate;
// Find the highest strain value within each strain step
List<double> highestStrains = new List<double>();
double intervalEndTime = actualStrainStep;
double maximumStrain = 0; // We need to keep track of the maximum strain in the current interval
OsuHitObjectDifficulty previousHitObject = null;
foreach (OsuHitObjectDifficulty hitObject in DifficultyHitObjects)
{
// While we are beyond the current interval push the currently available maximum to our strain list
while (hitObject.BaseHitObject.StartTime > intervalEndTime)
{
highestStrains.Add(maximumStrain);
// The maximum strain of the next interval is not zero by default! We need to take the last hitObject we encountered, take its strain and apply the decay
// until the beginning of the next interval.
if (previousHitObject == null)
{
maximumStrain = 0;
}
else
{
double decay = Math.Pow(OsuHitObjectDifficulty.DECAY_BASE[(int)type], (intervalEndTime - previousHitObject.BaseHitObject.StartTime) / 1000);
maximumStrain = previousHitObject.Strains[(int)type] * decay;
}
// Go to the next time interval
intervalEndTime += actualStrainStep;
}
// Obtain maximum strain
maximumStrain = Math.Max(hitObject.Strains[(int)type], maximumStrain);
previousHitObject = hitObject;
}
// Build the weighted sum over the highest strains for each interval
double difficulty = 0;
double weight = 1;
highestStrains.Sort((a, b) => b.CompareTo(a)); // Sort from highest to lowest strain.
foreach (double strain in highestStrains)
{
difficulty += weight * strain;
weight *= DECAY_WEIGHT;
}
return difficulty;
}
// Those values are used as array indices. Be careful when changing them!
public enum DifficultyType : int
{
Speed = 0,
Aim,
};
}
}

2
osu.Game.Modes.Osu/OsuRuleset.cs
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@ -40,6 +40,8 @@ namespace osu.Game.Modes.Osu
public override ScoreProcessor CreateScoreProcessor(int hitObjectCount) => new OsuScoreProcessor(hitObjectCount);
public override DifficultyCalculator CreateDifficultyCalculator(Beatmap beatmap) => new OsuDifficultyCalculator(beatmap);
protected override PlayMode PlayMode => PlayMode.Osu;
}
}

2
osu.Game.Modes.Osu/osu.Game.Modes.Osu.csproj
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@ -66,9 +66,11 @@
<Compile Include="Objects\Drawables\Pieces\TrianglesPiece.cs" />
<Compile Include="Objects\Drawables\Pieces\SliderBall.cs" />
<Compile Include="Objects\Drawables\Pieces\SliderBody.cs" />
<Compile Include="Objects\OsuHitObjectDifficulty.cs" />
<Compile Include="Objects\OsuHitObjectParser.cs" />
<Compile Include="Objects\SliderCurve.cs" />
<Compile Include="Objects\SliderTick.cs" />
<Compile Include="OsuDifficultyCalculator.cs" />
<Compile Include="OsuScore.cs" />
<Compile Include="OsuScoreProcessor.cs" />
<Compile Include="UI\OsuComboCounter.cs" />

27
osu.Game.Modes.Taiko/TaikoDifficultyCalculator.cs Normal file
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@ -0,0 +1,27 @@
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using osu.Game.Beatmaps;
using osu.Game.Modes.Objects;
using osu.Game.Modes.Taiko.Objects;
using System;
using System.Collections.Generic;
namespace osu.Game.Modes.Taiko
{
public class TaikoDifficultyCalculator : DifficultyCalculator<TaikoBaseHit>
{
protected override PlayMode PlayMode => PlayMode.Taiko;
public TaikoDifficultyCalculator(Beatmap beatmap) : base(beatmap)
{
}
protected override HitObjectConverter<TaikoBaseHit> Converter => new TaikoConverter();
protected override double ComputeDifficulty(Dictionary<String, String> categoryDifficulty)
{
return 0;
}
}
}

4
osu.Game.Modes.Taiko/TaikoRuleset.cs
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@ -2,10 +2,8 @@
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System;
using System.Collections.Generic;
using osu.Game.Graphics;
using osu.Game.Modes.Objects;
using osu.Game.Modes.Osu.Objects;
using osu.Game.Modes.Osu.UI;
using osu.Game.Modes.Taiko.UI;
using osu.Game.Modes.UI;
@ -26,5 +24,7 @@ namespace osu.Game.Modes.Taiko
public override ScoreProcessor CreateScoreProcessor(int hitObjectCount) => null;
public override HitObjectParser CreateHitObjectParser() => new NullHitObjectParser();
public override DifficultyCalculator CreateDifficultyCalculator(Beatmap beatmap) => new TaikoDifficultyCalculator(beatmap);
}
}

1
osu.Game.Modes.Taiko/osu.Game.Modes.Taiko.csproj
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@ -47,6 +47,7 @@
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="TaikoDifficultyCalculator.cs" />
<Compile Include="Objects\Drawable\DrawableTaikoHit.cs" />
<Compile Include="Objects\TaikoBaseHit.cs" />
<Compile Include="Objects\TaikoConverter.cs" />

3
osu.Game.Tests/Beatmaps/Formats/OsuLegacyDecoderTest.cs
View File

@ -1,18 +1,15 @@
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System;
using System.IO;
using NUnit.Framework;
using OpenTK;
using OpenTK.Graphics;
using osu.Game.Beatmaps;
using osu.Game.Beatmaps.Formats;
using osu.Game.Beatmaps.Samples;
using osu.Game.Modes;
using osu.Game.Modes.Osu;
using osu.Game.Modes.Osu.Objects;
using osu.Game.Screens.Play;
using osu.Game.Tests.Resources;
namespace osu.Game.Tests.Beatmaps.Formats

50
osu.Game/Beatmaps/DifficultyCalculator.cs Normal file
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@ -0,0 +1,50 @@
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using osu.Game.Modes;
using osu.Game.Modes.Objects;
using System;
using System.Collections.Generic;
namespace osu.Game.Beatmaps
{
public abstract class DifficultyCalculator
{
protected abstract PlayMode PlayMode { get; }
protected double TimeRate = 1;
protected abstract double ComputeDifficulty(Dictionary<String, String> categoryDifficulty);
private void loadTiming()
{
// TODO: Handle mods
int audioRate = 100;
TimeRate = audioRate / 100.0;
}
public double GetDifficulty(Dictionary<string, string> categoryDifficulty = null)
{
loadTiming();
double difficulty = ComputeDifficulty(categoryDifficulty);
return difficulty;
}
}
public abstract class DifficultyCalculator<T> : DifficultyCalculator where T : HitObject
{
protected List<T> Objects;
protected abstract HitObjectConverter<T> Converter { get; }
public DifficultyCalculator(Beatmap beatmap)
{
Objects = Converter.Convert(beatmap);
PreprocessHitObjects();
}
protected virtual void PreprocessHitObjects()
{
}
}
}

4
osu.Game/Beatmaps/Drawables/BeatmapGroup.cs
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@ -60,7 +60,7 @@ namespace osu.Game.Beatmaps.Drawables
}
}
public BeatmapGroup(WorkingBeatmap beatmap, BeatmapSetInfo set = null)
public BeatmapGroup(WorkingBeatmap beatmap)
{
Header = new BeatmapSetHeader(beatmap)
{
@ -68,6 +68,7 @@ namespace osu.Game.Beatmaps.Drawables
RelativeSizeAxes = Axes.X,
};
BeatmapSet = beatmap.BeatmapSetInfo;
BeatmapPanels = beatmap.BeatmapSetInfo.Beatmaps.Select(b => new BeatmapPanel(b)
{
Alpha = 0,
@ -76,7 +77,6 @@ namespace osu.Game.Beatmaps.Drawables
RelativeSizeAxes = Axes.X,
}).ToList();
BeatmapSet = set;
Header.AddDifficultyIcons(BeatmapPanels);
}

6
osu.Game/Beatmaps/Timing/TimingChange.cs
View File

@ -1,12 +1,6 @@
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace osu.Game.Beatmaps.Timing
{
class TimingChange : ControlPoint

1
osu.Game/Beatmaps/WorkingBeatmap.cs
View File

@ -68,7 +68,6 @@ namespace osu.Game.Beatmaps
beatmap = decoder?.Decode(stream);
}
if (WithStoryboard && beatmap != null && BeatmapSetInfo.StoryboardFile != null)
using (var stream = new StreamReader(reader.GetStream(BeatmapSetInfo.StoryboardFile)))
decoder?.Decode(stream, beatmap);

19
osu.Game/Database/BeatmapInfo.cs
View File

@ -8,6 +8,7 @@ using osu.Game.Modes;
using osu.Game.Screens.Play;
using SQLite.Net.Attributes;
using SQLiteNetExtensions.Attributes;
using osu.Game.Beatmaps;
namespace osu.Game.Database
{
@ -73,7 +74,23 @@ namespace osu.Game.Database
// Metadata
public string Version { get; set; }
public float StarDifficulty => BaseDifficulty?.OverallDifficulty ?? 5; //todo: implement properly
//todo: background threaded computation of this
private float starDifficulty = -1;
public float StarDifficulty
{
get
{
return (starDifficulty < 0) ? (BaseDifficulty?.OverallDifficulty ?? 5) : starDifficulty;
}
set { starDifficulty = value; }
}
internal void ComputeDifficulty(BeatmapDatabase database)
{
WorkingBeatmap wb = new WorkingBeatmap(this, BeatmapSet, database);
StarDifficulty = (float)Ruleset.GetRuleset(Mode).CreateDifficultyCalculator(wb.Beatmap).GetDifficulty();
}
public bool Equals(BeatmapInfo other)
{

2
osu.Game/Modes/Ruleset.cs
View File

@ -32,6 +32,8 @@ namespace osu.Game.Modes
public abstract HitObjectParser CreateHitObjectParser();
public abstract DifficultyCalculator CreateDifficultyCalculator(Beatmap beatmap);
public static void Register(Ruleset ruleset) => availableRulesets.TryAdd(ruleset.PlayMode, ruleset.GetType());
protected abstract PlayMode PlayMode { get; }

4
osu.Game/Screens/Select/PlaySongSelect.cs
View File

@ -337,11 +337,13 @@ namespace osu.Game.Screens.Select
if (b.Metadata == null) b.Metadata = beatmapSet.Metadata;
});
foreach (var b in beatmapSet.Beatmaps)
b.ComputeDifficulty(database);
beatmapSet.Beatmaps = beatmapSet.Beatmaps.OrderBy(b => b.StarDifficulty).ToList();
var beatmap = new WorkingBeatmap(beatmapSet.Beatmaps.FirstOrDefault(), beatmapSet, database);
var group = new BeatmapGroup(beatmap, beatmapSet)
var group = new BeatmapGroup(beatmap)
{
SelectionChanged = selectionChanged,
StartRequested = b => start()

1
osu.Game/osu.Game.csproj
View File

@ -66,6 +66,7 @@
</ItemGroup>
<ItemGroup>
<Compile Include="Beatmaps\Drawables\BeatmapBackgroundSprite.cs" />
<Compile Include="Beatmaps\DifficultyCalculator.cs" />
<Compile Include="Graphics\Backgrounds\Triangles.cs" />
<Compile Include="Graphics\Cursor\CursorTrail.cs" />
<Compile Include="Graphics\Sprites\OsuSpriteText.cs" />