From 44f55ed152d21be35ddbf36393d0a919172060de Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Wed, 26 Oct 2022 18:20:45 +0900
Subject: [PATCH] Add argon osu!catch hit explosion

---
 .../Skinning/Argon/ArgonHitExplosion.cs       | 112 ++++++++++++++++++
 .../Argon/CatchArgonSkinTransformer.cs        |   3 +
 2 files changed, 115 insertions(+)
 create mode 100644 osu.Game.Rulesets.Catch/Skinning/Argon/ArgonHitExplosion.cs

diff --git a/osu.Game.Rulesets.Catch/Skinning/Argon/ArgonHitExplosion.cs b/osu.Game.Rulesets.Catch/Skinning/Argon/ArgonHitExplosion.cs
new file mode 100644
index 0000000000..90dca49dfd
--- /dev/null
+++ b/osu.Game.Rulesets.Catch/Skinning/Argon/ArgonHitExplosion.cs
@@ -0,0 +1,112 @@
+// 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 osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Effects;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Utils;
+using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Catch.UI;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Catch.Skinning.Argon
+{
+    public class ArgonHitExplosion : CompositeDrawable, IHitExplosion
+    {
+        public override bool RemoveWhenNotAlive => true;
+
+        private Container tallExplosion = null!;
+        private Container largeFaint = null!;
+
+        private readonly Bindable<Color4> accentColour = new Bindable<Color4>();
+
+        public ArgonHitExplosion()
+        {
+            Size = new Vector2(20);
+            Anchor = Anchor.BottomCentre;
+            Origin = Anchor.BottomCentre;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            InternalChildren = new Drawable[]
+            {
+                tallExplosion = new Container
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    Masking = true,
+                    Width = 0.1f,
+                    Child = new Box
+                    {
+                        AlwaysPresent = true,
+                        Alpha = 0,
+                        RelativeSizeAxes = Axes.Both,
+                    },
+                },
+                largeFaint = new Container
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    Masking = true,
+                    Child = new Box
+                    {
+                        AlwaysPresent = true,
+                        Alpha = 0,
+                        RelativeSizeAxes = Axes.Both,
+                    },
+                },
+            };
+
+            accentColour.BindValueChanged(colour =>
+            {
+                tallExplosion.EdgeEffect = new EdgeEffectParameters
+                {
+                    Type = EdgeEffectType.Glow,
+                    Colour = colour.NewValue,
+                    Hollow = false,
+                    Roundness = 15,
+                    Radius = 15,
+                };
+
+                largeFaint.EdgeEffect = new EdgeEffectParameters
+                {
+                    Type = EdgeEffectType.Glow,
+                    Colour = Interpolation.ValueAt(0.2f, colour.NewValue, Color4.White, 0, 1),
+                    Hollow = false,
+                    Radius = 50,
+                };
+            }, true);
+        }
+
+        public void Animate(HitExplosionEntry entry)
+        {
+            X = entry.Position;
+            Scale = new Vector2(entry.HitObject.Scale);
+            accentColour.Value = entry.ObjectColour;
+
+            using (BeginAbsoluteSequence(entry.LifetimeStart))
+            {
+                this.FadeOutFromOne(400);
+
+                if (!(entry.HitObject is Droplet))
+                {
+                    float scale = Math.Clamp(entry.JudgementResult.ComboAtJudgement / 200f, 0.35f, 1.125f);
+
+                    tallExplosion
+                        .ScaleTo(new Vector2(1.1f, 20 * scale), 200, Easing.OutQuint)
+                        .Then()
+                        .ScaleTo(new Vector2(1.1f, 1), 600, Easing.In);
+                }
+            }
+        }
+    }
+}
diff --git a/osu.Game.Rulesets.Catch/Skinning/Argon/CatchArgonSkinTransformer.cs b/osu.Game.Rulesets.Catch/Skinning/Argon/CatchArgonSkinTransformer.cs
index 76a5b221fd..30542187f2 100644
--- a/osu.Game.Rulesets.Catch/Skinning/Argon/CatchArgonSkinTransformer.cs
+++ b/osu.Game.Rulesets.Catch/Skinning/Argon/CatchArgonSkinTransformer.cs
@@ -21,6 +21,9 @@ namespace osu.Game.Rulesets.Catch.Skinning.Argon
                     // TODO: Once everything is finalised, consider throwing UnsupportedSkinComponentException on missing entries.
                     switch (osuComponent.Component)
                     {
+                        case CatchSkinComponents.HitExplosion:
+                            return new ArgonHitExplosion();
+
                         case CatchSkinComponents.Catcher:
                             return new ArgonCatcher();