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osu-lazer/osu.Game/Screens/Ranking/Statistics/HitEventTimingDistributionGraph.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.
using System;
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using System.Collections.Generic;
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using System.Linq;
using osu.Framework.Allocation;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Layout;
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using osu.Game.Graphics;
using osu.Game.Graphics.Sprites;
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using osu.Game.Rulesets.Scoring;
using osuTK.Graphics;
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namespace osu.Game.Screens.Ranking.Statistics
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{
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/// <summary>
/// A graph which displays the distribution of hit timing in a series of <see cref="HitEvent"/>s.
/// </summary>
public partial class HitEventTimingDistributionGraph : CompositeDrawable
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{
/// <summary>
/// The number of bins on each side of the timing distribution.
/// </summary>
private const int timing_distribution_bins = 50;
/// <summary>
/// The total number of bins in the timing distribution, including bins on both sides and the centre bin at 0.
/// </summary>
private const int total_timing_distribution_bins = timing_distribution_bins * 2 + 1;
/// <summary>
/// The centre bin, with a timing distribution very close to/at 0.
/// </summary>
private const int timing_distribution_centre_bin_index = timing_distribution_bins;
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/// <summary>
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/// The number of data points shown on each side of the axis below the graph.
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/// </summary>
private const float axis_points = 5;
/// <summary>
/// The currently displayed hit events.
/// </summary>
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private readonly IReadOnlyList<HitEvent> hitEvents;
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private readonly IDictionary<HitResult, int>[] bins;
private double binSize;
private double hitOffset;
private Bar[]? barDrawables;
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/// <summary>
/// Creates a new <see cref="HitEventTimingDistributionGraph"/>.
/// </summary>
/// <param name="hitEvents">The <see cref="HitEvent"/>s to display the timing distribution of.</param>
public HitEventTimingDistributionGraph(IReadOnlyList<HitEvent> hitEvents)
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{
this.hitEvents = hitEvents.Where(e => !(e.HitObject.HitWindows is HitWindows.EmptyHitWindows) && e.Result.IsBasic() && e.Result.IsHit()).ToList();
bins = Enumerable.Range(0, total_timing_distribution_bins).Select(_ => new Dictionary<HitResult, int>()).ToArray<IDictionary<HitResult, int>>();
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}
[BackgroundDependencyLoader]
private void load()
{
if (hitEvents.Count == 0)
return;
binSize = Math.Ceiling(hitEvents.Max(e => Math.Abs(e.TimeOffset)) / timing_distribution_bins);
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// Prevent div-by-0 by enforcing a minimum bin size
binSize = Math.Max(1, binSize);
Scheduler.AddOnce(updateDisplay);
}
public void UpdateOffset(double hitOffset)
{
this.hitOffset = hitOffset;
Scheduler.AddOnce(updateDisplay);
}
private void updateDisplay()
{
bool roundUp = true;
foreach (var bin in bins)
bin.Clear();
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foreach (var e in hitEvents)
{
double time = e.TimeOffset + hitOffset;
double binOffset = time / binSize;
// .NET's round midpoint handling doesn't provide a behaviour that works amazingly for display
// purposes here. We want midpoint rounding to roughly distribute evenly to each adjacent bucket
// so the easiest way is to cycle between downwards and upwards rounding as we process events.
if (Math.Abs(binOffset - (int)binOffset) == 0.5)
{
binOffset = (int)binOffset + Math.Sign(binOffset) * (roundUp ? 1 : 0);
roundUp = !roundUp;
}
int index = timing_distribution_centre_bin_index + (int)Math.Round(binOffset, MidpointRounding.AwayFromZero);
// may be out of range when applying an offset. for such cases we can just drop the results.
if (index >= 0 && index < bins.Length)
{
bins[index].TryGetValue(e.Result, out int value);
bins[index][e.Result] = ++value;
}
}
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if (barDrawables == null)
createBarDrawables();
else
{
for (int i = 0; i < barDrawables.Length; i++)
barDrawables[i].UpdateOffset(bins[i].Sum(b => b.Value));
}
}
private void createBarDrawables()
{
int maxCount = bins.Max(b => b.Values.Sum());
barDrawables = bins.Select((_, i) => new Bar(bins[i], maxCount, i == timing_distribution_centre_bin_index)).ToArray();
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Container axisFlow;
Padding = new MarginPadding { Horizontal = 5 };
InternalChild = new GridContainer
{
RelativeSizeAxes = Axes.Both,
Content = new[]
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{
new Drawable[]
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{
new GridContainer
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{
RelativeSizeAxes = Axes.Both,
Content = new[] { barDrawables }
}
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},
new Drawable[]
{
axisFlow = new Container
{
RelativeSizeAxes = Axes.X,
Height = StatisticItem.FONT_SIZE,
}
},
},
RowDimensions = new[]
{
new Dimension(),
new Dimension(GridSizeMode.AutoSize),
}
};
// Our axis will contain one centre element + 5 points on each side, each with a value depending on the number of bins * bin size.
double maxValue = timing_distribution_bins * binSize;
double axisValueStep = maxValue / axis_points;
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axisFlow.Add(new OsuSpriteText
{
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
Text = "0",
Font = OsuFont.GetFont(size: StatisticItem.FONT_SIZE, weight: FontWeight.SemiBold)
});
for (int i = 1; i <= axis_points; i++)
{
double axisValue = i * axisValueStep;
float position = (float)(axisValue / maxValue);
float alpha = 1f - position * 0.8f;
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axisFlow.Add(new OsuSpriteText
{
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
RelativePositionAxes = Axes.X,
X = -position / 2,
Alpha = alpha,
Text = axisValue.ToString("-0"),
Font = OsuFont.GetFont(size: StatisticItem.FONT_SIZE, weight: FontWeight.SemiBold)
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});
axisFlow.Add(new OsuSpriteText
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{
Anchor = Anchor.Centre,
Origin = Anchor.Centre,
RelativePositionAxes = Axes.X,
X = position / 2,
Alpha = alpha,
Text = axisValue.ToString("+0"),
Font = OsuFont.GetFont(size: StatisticItem.FONT_SIZE, weight: FontWeight.SemiBold)
});
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}
}
private partial class Bar : CompositeDrawable
{
private readonly IReadOnlyList<KeyValuePair<HitResult, int>> values;
private readonly float maxValue;
private readonly bool isCentre;
private readonly float totalValue;
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private const float minimum_height = 0.02f;
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private float offsetAdjustment;
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private Circle[] boxOriginals = null!;
private Circle? boxAdjustment;
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private float? lastDrawHeight;
[Resolved]
private OsuColour colours { get; set; } = null!;
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private const double duration = 300;
public Bar(IDictionary<HitResult, int> values, float maxValue, bool isCentre)
{
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this.values = values.OrderBy(v => v.Key.GetIndexForOrderedDisplay()).ToList();
this.maxValue = maxValue;
this.isCentre = isCentre;
totalValue = values.Sum(v => v.Value);
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offsetAdjustment = totalValue;
RelativeSizeAxes = Axes.Both;
Masking = true;
}
[BackgroundDependencyLoader]
private void load()
{
if (values.Any())
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{
boxOriginals = values.Select((v, i) => new Circle
{
RelativeSizeAxes = Axes.Both,
Anchor = Anchor.BottomCentre,
Origin = Anchor.BottomCentre,
Colour = isCentre && i == 0 ? Color4.White : colours.ForHitResult(v.Key),
Height = 0,
}).ToArray();
// The bars of the stacked bar graph will be processed (stacked) from the bottom, which is the base position,
// to the top, and the bottom bar should be drawn more toward the front by design,
// while the drawing order is from the back to the front, so the order passed to `InternalChildren` is the opposite.
InternalChildren = boxOriginals.Reverse().ToArray();
}
else
{
// A bin with no value draws a grey dot instead.
InternalChildren = boxOriginals = new[]
{
new Circle
{
RelativeSizeAxes = Axes.Both,
Anchor = Anchor.BottomCentre,
Origin = Anchor.BottomCentre,
Colour = isCentre ? Color4.White : Color4.Gray,
Height = 0,
}
};
}
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}
protected override void LoadComplete()
{
base.LoadComplete();
Scheduler.AddOnce(updateMetrics, true);
}
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protected override bool OnInvalidate(Invalidation invalidation, InvalidationSource source)
{
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if (invalidation.HasFlag(Invalidation.DrawSize))
{
if (lastDrawHeight != null && lastDrawHeight != DrawHeight)
Scheduler.AddOnce(updateMetrics, false);
}
return base.OnInvalidate(invalidation, source);
}
public void UpdateOffset(float adjustment)
{
bool hasAdjustment = adjustment != totalValue;
if (boxAdjustment == null)
{
if (!hasAdjustment)
return;
AddInternal(boxAdjustment = new Circle
{
RelativeSizeAxes = Axes.Both,
Anchor = Anchor.BottomCentre,
Origin = Anchor.BottomCentre,
Colour = Color4.Yellow,
Blending = BlendingParameters.Additive,
Alpha = 0.6f,
Height = 0,
});
}
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offsetAdjustment = adjustment;
Scheduler.AddOnce(updateMetrics, true);
}
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private void updateMetrics(bool animate = true)
{
float offsetValue = 0;
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for (int i = 0; i < boxOriginals.Length; i++)
{
int value = i < values.Count ? values[i].Value : 0;
var box = boxOriginals[i];
box.MoveToY(offsetForValue(offsetValue) * BoundingBox.Height, duration, Easing.OutQuint);
box.ResizeHeightTo(heightForValue(value), duration, Easing.OutQuint);
offsetValue -= value;
}
if (boxAdjustment != null)
drawAdjustmentBar();
if (!animate)
FinishTransforms(true);
lastDrawHeight = DrawHeight;
}
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private void drawAdjustmentBar()
{
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bool hasAdjustment = offsetAdjustment != totalValue;
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boxAdjustment.ResizeHeightTo(heightForValue(offsetAdjustment), duration, Easing.OutQuint);
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boxAdjustment.FadeTo(!hasAdjustment ? 0 : 1, duration, Easing.OutQuint);
}
private float offsetForValue(float value) => (1 - minimum_height) * value / maxValue;
private float heightForValue(float value) => minimum_height + offsetForValue(value);
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}
}
}