Add basic osu!taiko "argon" swell visual

osu.Game.Rulesets.Taiko/Skinning/Argon/ArgonSwellCirclePiece.cs

@@ -0,0 +1,34 @@
+// Copyright (c) ppy Pty Ltd <[email protected]>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Sprites;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Taiko.Skinning.Argon
+{
+    public class ArgonSwellCirclePiece : ArgonCirclePiece
+    {
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            AccentColour = ColourInfo.GradientVertical(
+                new Color4(240, 201, 0, 255),
+                new Color4(167, 139, 0, 255)
+            );
+
+            AddInternal(new SpriteIcon
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                RelativeSizeAxes = Axes.Both,
+                Icon = FontAwesome.Solid.Asterisk,
+                Size = new Vector2(ICON_SIZE),
+                Scale = new Vector2(0.8f, 1)
+            });
+        }
+    }
+}

osu.Game.Rulesets.Taiko/Skinning/Argon/TaikoArgonSkinTransformer.cs

@@ -60,6 +60,9 @@ public TaikoArgonSkinTransformer(ISkin skin)
                         case TaikoSkinComponents.TaikoExplosionMiss:
                         case TaikoSkinComponents.TaikoExplosionOk:
                             return new ArgonHitExplosion(taikoComponent.Component);
+
+                        case TaikoSkinComponents.Swell:
+                            return new ArgonSwellCirclePiece();
                     }
 
                     break;