Full legacy smoke implementation and temp default smoke

osu.Game.Rulesets.Osu/Skinning/Default/DefaultSmoke.cs

@@ -1,14 +1,61 @@
 // 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;
+using System.Diagnostics;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Rendering;
+using osuTK.Graphics;
+
 namespace osu.Game.Rulesets.Osu.Skinning.Default
 {
     public class DefaultSmoke : Smoke
     {
+        private const double fade_out_delay = 8000;
+        private const double fade_out_speed = 3;
+        private const double fade_out_duration = 50;
+        private const float alpha = 0.5f;
+
+        protected override double LifetimeAfterSmokeEnd => fade_out_delay + fade_out_duration + (SmokeEndTime - SmokeStartTime) / fade_out_speed;
+
         public DefaultSmoke()
         {
-            Texture = null;
-            PathRadius = 2;
+            Radius = 2;
+        }
+
+        protected override DrawNode CreateDrawNode() => new DefaultSmokeDrawNode(this);
+
+        private class DefaultSmokeDrawNode : SmokeDrawNode
+        {
+            private double fadeOutTime;
+
+            public DefaultSmokeDrawNode(ITexturedShaderDrawable source)
+                : base(source)
+            {
+            }
+
+            protected override void UpdateDrawVariables(IRenderer renderer)
+            {
+                base.UpdateDrawVariables(renderer);
+
+                fadeOutTime = SmokeStartTime + fade_out_speed * (CurrentTime - (SmokeEndTime + fade_out_delay));
+            }
+
+            protected override Color4 ColorAtTime(double pointTime)
+            {
+                var color = Color4.White;
+                color.A = alpha;
+
+                double timeDoingFadeOut = fadeOutTime - pointTime;
+                if (timeDoingFadeOut > 0)
+                {
+                    float fraction = Math.Clamp((float)(1 - (timeDoingFadeOut / fade_out_duration)), 0, 1);
+                    fraction = MathF.Pow(fraction, 5);
+                    color.A *= fraction;
+                }
+
+                return color;
+            }
         }
     }
 }

osu.Game.Rulesets.Osu/Skinning/Legacy/LegacySmoke.cs

@@ -1,19 +1,42 @@
 // 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;
+using System.Diagnostics;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Rendering;
 using osu.Game.Skinning;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Osu.Skinning.Legacy
 {
     public class LegacySmoke : Smoke
     {
+        private const double initial_fade_out_duration = 2500;
+
+        private const double re_fade_in_speed = 3;
+        private const double re_fade_in_duration = 50;
+
+        private const double final_fade_out_duration = 7500;
+
+        private const float initial_alpha = 0.8f;
+        private const float re_fade_in_alpha = 1.4f;
+
+        protected override double LifetimeAfterSmokeEnd
+        {
+            get
+            {
+                double initialFadeOutDurationTrunc = Math.Min(initial_fade_out_duration, SmokeEndTime - SmokeStartTime);
+                return final_fade_out_duration + initialFadeOutDurationTrunc * (1 + re_fade_in_speed);
+            }
+        }
+
         private ISkin skin;
 
         public LegacySmoke(ISkin skin)
         {
             this.skin = skin;
-
-            PathRadius = 8;
+            Radius = 3;
         }
 
         protected override void LoadComplete()
@@ -22,5 +45,71 @@ namespace osu.Game.Rulesets.Osu.Skinning.Legacy
 
             Texture = skin.GetTexture("cursor-smoke");
         }
+
+        protected override DrawNode CreateDrawNode() => new LegacySmokeDrawNode(this);
+
+        protected class LegacySmokeDrawNode : SmokeDrawNode
+        {
+            private double initialFadeOutDurationTrunc;
+            private double initialFadeOutTime;
+            private double reFadeInTime;
+            private double finalFadeOutTime;
+
+            public LegacySmokeDrawNode(ITexturedShaderDrawable source)
+                : base(source)
+            {
+            }
+
+            public override void ApplyState()
+            {
+                base.ApplyState();
+
+                initialFadeOutDurationTrunc = Math.Min(initial_fade_out_duration, SmokeEndTime - SmokeStartTime);
+            }
+
+            protected override void UpdateDrawVariables(IRenderer renderer)
+            {
+                base.UpdateDrawVariables(renderer);
+
+                initialFadeOutTime = Math.Min(CurrentTime, SmokeEndTime);
+                reFadeInTime = re_fade_in_speed * (CurrentTime - SmokeEndTime) + SmokeEndTime - initialFadeOutDurationTrunc;
+                finalFadeOutTime = CurrentTime - initialFadeOutDurationTrunc * (1 + 1 / re_fade_in_speed);
+            }
+
+            protected override Color4 ColorAtTime(double pointTime)
+            {
+                var color = Color4.White;
+
+                double timeDoingInitialFadeOut = initialFadeOutTime - pointTime;
+
+                if (timeDoingInitialFadeOut > 0)
+                {
+                    float fraction = Math.Clamp((float)(timeDoingInitialFadeOut / initial_fade_out_duration), 0, 1);
+                    fraction = MathF.Pow(fraction, 5);
+                    color.A = (1 - fraction) * initial_alpha;
+                }
+
+                if (color.A > 0)
+                {
+                    double timeDoingReFadeIn = reFadeInTime - pointTime;
+                    double timeDoingFinalFadeOut = finalFadeOutTime - pointTime;
+
+                    if (timeDoingFinalFadeOut > 0)
+                    {
+                        float fraction = Math.Clamp((float)(timeDoingFinalFadeOut / final_fade_out_duration), 0, 1);
+                        fraction = MathF.Pow(fraction, 5);
+                        color.A = (1 - fraction) * re_fade_in_alpha;
+                    }
+                    else if (timeDoingReFadeIn > 0)
+                    {
+                        float fraction = Math.Clamp((float)(timeDoingReFadeIn / re_fade_in_duration), 0, 1);
+                        fraction = 1 - MathF.Pow(1 - fraction, 5);
+                        color.A = fraction * (re_fade_in_alpha - color.A) + color.A;
+                    }
+                }
+
+                return color;
+            }
+        }
     }
 }

osu.Game.Rulesets.Osu/Skinning/Smoke.cs

@@ -1,33 +1,175 @@
 // 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;
 using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 using osu.Framework.Allocation;
+using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
-using osu.Framework.Graphics.Lines;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Primitives;
+using osu.Framework.Graphics.Rendering;
+using osu.Framework.Graphics.Rendering.Vertices;
+using osu.Framework.Graphics.Shaders;
+using osu.Framework.Graphics.Textures;
+using osu.Framework.Timing;
+using osu.Framework.Utils;
 using osu.Game.Rulesets.Osu.UI;
+using osu.Game.Skinning;
 using osuTK;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Osu.Skinning
 {
-    public abstract class Smoke : TexturedPath
+    public abstract class Smoke : Drawable, ITexturedShaderDrawable
     {
-        protected bool IsActive { get; private set; }
-        protected double SmokeTimeStart { get; private set; } = double.MinValue;
-        protected double SmokeTimeEnd { get; private set; } = double.MinValue;
+        public IShader? TextureShader { get; private set; }
+        public IShader? RoundedTextureShader { get; private set; }
 
-        protected readonly List<Vector2> SmokeVertexPositions = new List<Vector2>();
-        protected readonly List<double> SmokeVertexTimes = new List<double>();
+        private float radius = 1;
+        protected float Radius
+        {
+            get => radius;
+            set
+            {
+                if (radius == value)
+                    return;
+
+                radius = value;
+                Invalidate(Invalidation.DrawNode);
+            }
+        }
+
+
+        private int rotationSeed = RNG.Next();
+        protected int RotationSeed
+        {
+            get => rotationSeed;
+            set
+            {
+                if (rotationSeed == value)
+                    return;
+
+                rotationSeed = value;
+                Invalidate(Invalidation.DrawNode);
+            }
+        }
+
+        private Texture? texture;
+        protected Texture? Texture
+        {
+            get => texture;
+            set
+            {
+                texture = value;
+                Invalidate(Invalidation.DrawNode);
+            }
+        }
+
+        private double smokeTimeStart = double.MinValue;
+        protected double SmokeStartTime
+        {
+            get => smokeTimeStart;
+            private set
+            {
+                if (smokeTimeStart == value)
+                    return;
+
+                smokeTimeStart = value;
+                Invalidate(Invalidation.DrawNode);
+            }
+        }
+
+        private double smokeTimeEnd = double.MaxValue;
+        protected double SmokeEndTime
+        {
+            get => smokeTimeEnd;
+            private set
+            {
+                if (smokeTimeEnd == value)
+                    return;
+
+                smokeTimeEnd = value;
+                Invalidate(Invalidation.DrawNode);
+            }
+        }
+
+        public override IFrameBasedClock Clock
+        {
+            get => base.Clock;
+            set
+            {
+                base.Clock = value;
+                Invalidate(Invalidation.DrawNode);
+            }
+        }
+
+        private Vector2 topLeft;
+        protected Vector2 TopLeft
+        {
+            get => topLeft;
+            set
+            {
+                if (topLeft == value)
+                    return;
+
+                topLeft = value;
+                Invalidate(Invalidation.All);
+            }
+        }
+
+        private Vector2 bottomRight;
+        protected Vector2 BottomRight
+        {
+            get => bottomRight;
+            set
+            {
+                if (bottomRight == value)
+                    return;
+
+                bottomRight = value;
+                Invalidate(Invalidation.Layout);
+            }
+        }
+
+        protected abstract double LifetimeAfterSmokeEnd { get; }
+        protected virtual float PointInterval => Radius * 7f / 8;
+        protected bool IsActive { get; private set; }
+
+        protected readonly List<SmokePoint> SmokePoints = new List<SmokePoint>();
+
+        private float totalDistance;
+        private Vector2? lastPosition = null;
+
+        private const double max_duration = 60_000;
+
+        public override float Height
+        {
+            get => base.Height = BottomRight.Y - TopLeft.Y;
+            set => throw new InvalidOperationException($"Cannot manually set {nameof(Height)} of {nameof(Smoke)}.");
+        }
+
+        public override float Width
+        {
+            get => base.Width = BottomRight.X - TopLeft.X;
+            set => throw new InvalidOperationException($"Cannot manually set {nameof(Width)} of {nameof(Smoke)}.");
+        }
+
+        public override Vector2 Size
+        {
+            get => base.Size = BottomRight - TopLeft;
+            set => throw new InvalidOperationException($"Cannot manually set {nameof(Size)} of {nameof(Smoke)}.");
+        }
 
         [Resolved(CanBeNull = true)]
         private SmokeContainer? smokeContainer { get; set; }
 
-        protected struct SmokePoint
+        [BackgroundDependencyLoader]
+        private void load(ShaderManager shaders)
         {
-            public Vector2 Position;
-            public double Time;
+            RoundedTextureShader = shaders.Load(VertexShaderDescriptor.TEXTURE_2, FragmentShaderDescriptor.TEXTURE_ROUNDED);
+            TextureShader = shaders.Load(VertexShaderDescriptor.TEXTURE_2, FragmentShaderDescriptor.TEXTURE);
         }
 
         protected override void LoadComplete()
@@ -36,72 +178,107 @@ namespace osu.Game.Rulesets.Osu.Skinning
 
             if (smokeContainer != null)
             {
-                smokeContainer.SmokeMoved += guardOnSmokeMoved;
-                smokeContainer.SmokeEnded += guardOnSmokeEnded;
+                smokeContainer.SmokeMoved += onSmokeMoved;
+                smokeContainer.SmokeEnded += onSmokeEnded;
                 IsActive = true;
             }
 
             Anchor = Anchor.TopLeft;
             Origin = Anchor.TopLeft;
 
-            SmokeTimeStart = Time.Current;
+            SmokeStartTime = Time.Current;
         }
 
-        private void guardOnSmokeMoved(Vector2 position, double time)
+        private void onSmokeMoved(Vector2 position, double time)
         {
-            if (IsActive)
-                OnSmokeMoved(position, time);
-        }
+            if (!IsActive)
+                return;
 
-        private void guardOnSmokeEnded(double time)
-        {
-            if (IsActive)
-                OnSmokeEnded(time);
-        }
+            lastPosition ??= position;
 
-        protected virtual void OnSmokeMoved(Vector2 position, double time)
-        {
-            addSmokeVertex(position, time);
-        }
+            float delta = (position - (Vector2)lastPosition).LengthFast;
+            totalDistance += delta;
+            int count = (int)(totalDistance / PointInterval);
 
-        private void addSmokeVertex(Vector2 position, double time)
-        {
-            Debug.Assert(SmokeVertexTimes.Count == SmokeVertexPositions.Count);
-
-            if (SmokeVertexTimes.Count > 0 && SmokeVertexTimes.Last() > time)
+            if (count > 0)
             {
-                int index = ~SmokeVertexTimes.BinarySearch(time, new UpperBoundComparer());
+                Vector2 increment = position - (Vector2)lastPosition;
+                increment.NormalizeFast();
 
-                SmokeVertexTimes.RemoveRange(index, SmokeVertexTimes.Count - index);
-                SmokeVertexPositions.RemoveRange(index, SmokeVertexPositions.Count - index);
+                Vector2 pointPos = (PointInterval - (totalDistance - delta)) * increment + (Vector2)lastPosition;
+                increment *= PointInterval;
+
+                if (SmokePoints.Count > 0 && SmokePoints[^1].Time > time)
+                {
+                    int index = ~SmokePoints.BinarySearch(new SmokePoint { Time = time }, new SmokePoint.UpperBoundComparer());
+                    SmokePoints.RemoveRange(index, SmokePoints.Count - index);
+                    recalculateBounds();
+                }
+
+                totalDistance %= PointInterval;
+                for (int i = 0; i < count; i++)
+                {
+                    SmokePoints.Add(new SmokePoint
+                    {
+                        Position = pointPos,
+                        Time = time,
+                    });
+
+                    pointPos += increment;
+                }
+
+                Invalidate(Invalidation.DrawNode);
+                adaptBounds(position);
             }
 
-            SmokeVertexTimes.Add(time);
-            SmokeVertexPositions.Add(position);
+            lastPosition = position;
+
+            if (time - SmokeStartTime > max_duration)
+                onSmokeEnded(time);
         }
 
-        protected virtual void OnSmokeEnded(double time)
+        private void recalculateBounds()
         {
-            IsActive = false;
-            SmokeTimeEnd = time;
+            TopLeft = BottomRight = Vector2.Zero;
+
+            foreach (var point in SmokePoints)
+                adaptBounds(point.Position);
         }
 
+        private void adaptBounds(Vector2 position)
+        {
+            if (position.X < TopLeft.X)
+                TopLeft = new Vector2(position.X, TopLeft.Y);
+            else if (position.X > BottomRight.X)
+                BottomRight = new Vector2(position.X, BottomRight.Y);
+
+            if (position.Y < TopLeft.Y)
+                TopLeft = new Vector2(TopLeft.X, position.Y);
+            else if (position.Y > BottomRight.Y)
+                BottomRight = new Vector2(BottomRight.X, position.Y);
+        }
+
+        private void onSmokeEnded(double time)
+        {
+            if (!IsActive)
+                return;
+
+            IsActive = false;
+            SmokeEndTime = time;
+            LifetimeEnd = time + LifetimeAfterSmokeEnd + 100;
+
+            // TODO: HYPER MEGA JANK WTF??
+            if (Parent is SkinnableDrawable)
+                Parent.LifetimeEnd = LifetimeEnd;
+        }
+
+        protected abstract override DrawNode CreateDrawNode();
+
         protected override void Update()
         {
             base.Update();
 
-            const double visible_duration = 8000;
-            const float disappear_speed = 3;
-
-            int index = 0;
-            if (!IsActive)
-            {
-                double cutoffTime = SmokeTimeStart + disappear_speed * (Time.Current - (SmokeTimeEnd + visible_duration));
-                index = ~SmokeVertexTimes.BinarySearch(cutoffTime, new UpperBoundComparer());
-            }
-            Vertices = new List<Vector2>(SmokeVertexPositions.Skip(index));
-
-            Position = -PositionInBoundingBox(Vector2.Zero);
+            Position = TopLeft;
         }
 
         protected override void Dispose(bool isDisposing)
@@ -110,21 +287,163 @@ namespace osu.Game.Rulesets.Osu.Skinning
 
             if (smokeContainer != null)
             {
-                smokeContainer.SmokeMoved -= guardOnSmokeMoved;
-                smokeContainer.SmokeEnded -= guardOnSmokeEnded;
+                smokeContainer.SmokeMoved -= onSmokeMoved;
+                smokeContainer.SmokeEnded -= onSmokeEnded;
             }
         }
 
-        private struct UpperBoundComparer : IComparer<double>
+        protected struct SmokePoint
         {
-            public int Compare(double x, double target)
-            {
-                // By returning -1 when the target value is equal to x, guarantees that the
-                // element at BinarySearch's returned index will always be the first element
-                // larger. Since 0 is never returned, the target is never "found", so the return
-                // value will be the index's complement.
+            public Vector2 Position;
+            public double Time;
 
-                return x > target ? 1 : -1;
+            public struct UpperBoundComparer : IComparer<SmokePoint>
+            {
+                public int Compare(SmokePoint x, SmokePoint target)
+                {
+                    // By returning -1 when the target value is equal to x, guarantees that the
+                    // element at BinarySearch's returned index will always be the first element
+                    // larger. Since 0 is never returned, the target is never "found", so the return
+                    // value will be the index's complement.
+
+                    return x.Time > target.Time ? 1 : -1;
+                }
+            }
+        }
+
+        protected abstract class SmokeDrawNode : TexturedShaderDrawNode
+        {
+            protected new Smoke Source => (Smoke)base.Source;
+
+            protected IVertexBatch<TexturedVertex2D>? QuadBatch;
+
+            protected readonly List<SmokePoint> Points = new List<SmokePoint>();
+
+            protected float Radius;
+            protected Vector2 DrawSize;
+            protected Vector2 PositionOffset;
+            protected Texture? Texture;
+
+            protected double SmokeStartTime;
+            protected double SmokeEndTime;
+            protected double CurrentTime;
+
+            protected RectangleF TextureRect;
+
+            private IFrameBasedClock? clock;
+
+            private int rotationSeed;
+            private Random rotationRNG = new Random();
+
+            public SmokeDrawNode(ITexturedShaderDrawable source)
+                : base(source)
+            {
+            }
+
+            public override void ApplyState()
+            {
+                base.ApplyState();
+
+                Points.Clear();
+                Points.AddRange(Source.SmokePoints);
+
+                Radius = Source.Radius;
+                DrawSize = Source.DrawSize;
+                PositionOffset = Source.TopLeft;
+                Texture = Source.Texture;
+                clock = Source.Clock;
+
+                SmokeStartTime = Source.SmokeStartTime;
+                SmokeEndTime = Source.SmokeEndTime;
+
+                rotationSeed = Source.RotationSeed;
+            }
+
+            public sealed override void Draw(IRenderer renderer)
+            {
+                base.Draw(renderer);
+
+                if (Points.Count == 0)
+                    return;
+
+                QuadBatch ??= renderer.CreateQuadBatch<TexturedVertex2D>(7200, 10);
+                Texture ??= renderer.WhitePixel;
+
+                var shader = GetAppropriateShader(renderer);
+                shader.Bind();
+                Texture.Bind();
+
+                UpdateDrawVariables(renderer);
+                UpdateVertexBuffer();
+
+                shader.Unbind();
+            }
+
+            protected Color4 ColorAtPosition(Vector2 localPos) => DrawColourInfo.Colour.HasSingleColour
+                ? ((SRGBColour)DrawColourInfo.Colour).Linear
+                : DrawColourInfo.Colour.Interpolate(Vector2.Divide(localPos, DrawSize)).Linear;
+
+            protected abstract Color4 ColorAtTime(double pointTime);
+
+            protected virtual void UpdateDrawVariables(IRenderer renderer)
+            {
+                Debug.Assert(clock != null);
+                Debug.Assert(Texture != null);
+
+                CurrentTime = clock.CurrentTime;
+                TextureRect = Texture.GetTextureRect();
+                rotationRNG = new Random(rotationSeed);
+            }
+
+            protected virtual void UpdateVertexBuffer()
+            {
+                foreach (var point in Points)
+                    drawPointQuad(point);
+            }
+
+            private Vector2 nextTextureDirection()
+            {
+                float angle = (float)rotationRNG.NextDouble() * 2 * MathF.PI;
+                return new Vector2(MathF.Sin(angle), -MathF.Cos(angle));
+            }
+
+            private void drawPointQuad(SmokePoint point)
+            {
+                Debug.Assert(QuadBatch != null);
+
+                var color = ColorAtTime(point.Time);
+                var dir = nextTextureDirection();
+                var ortho = dir.PerpendicularLeft;
+
+                var localTopLeft = point.Position + (Radius * (-ortho - dir)) - PositionOffset;
+                var localTopRight = point.Position + (Radius * (-ortho + dir)) - PositionOffset;
+                var localBotLeft = point.Position + (Radius * (ortho - dir)) - PositionOffset;
+                var localBotRight = point.Position + (Radius * (ortho + dir)) - PositionOffset;
+
+                QuadBatch.Add(new TexturedVertex2D
+                {
+                    Position = Vector2Extensions.Transform(localTopLeft, DrawInfo.Matrix),
+                    TexturePosition = TextureRect.TopLeft,
+                    Colour = Color4Extensions.Multiply(ColorAtPosition(localTopLeft), color),
+                });
+                QuadBatch.Add(new TexturedVertex2D
+                {
+                    Position = Vector2Extensions.Transform(localTopRight, DrawInfo.Matrix),
+                    TexturePosition = TextureRect.TopRight,
+                    Colour = Color4Extensions.Multiply(ColorAtPosition(localTopRight), color),
+                });
+                QuadBatch.Add(new TexturedVertex2D
+                {
+                    Position = Vector2Extensions.Transform(localBotRight, DrawInfo.Matrix),
+                    TexturePosition = TextureRect.BottomRight,
+                    Colour = Color4Extensions.Multiply(ColorAtPosition(localBotRight), color),
+                });
+                QuadBatch.Add(new TexturedVertex2D
+                {
+                    Position = Vector2Extensions.Transform(localBotLeft, DrawInfo.Matrix),
+                    TexturePosition = TextureRect.BottomLeft,
+                    Colour = Color4Extensions.Multiply(ColorAtPosition(localBotLeft), color),
+                });
             }
         }
     }

osu.Game.Rulesets.Osu/UI/SmokeContainer.cs

@@ -3,7 +3,6 @@
 
 using System;
 using osu.Framework.Allocation;
-using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Input;
 using osu.Framework.Input.Bindings;