Mode -> Ruleset.

osu.Game.Rulesets.Osu/Objects/Drawables/Pieces/ExplodePiece.cs

@@ -0,0 +1,33 @@
+// 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.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
+{
+    public class ExplodePiece : Container
+    {
+        public ExplodePiece()
+        {
+            Size = new Vector2(128);
+
+            Anchor = Anchor.Centre;
+            Origin = Anchor.Centre;
+
+            BlendingMode = BlendingMode.Additive;
+            Alpha = 0;
+
+            Children = new Drawable[]
+            {
+                new TrianglesPiece
+                {
+                    BlendingMode = BlendingMode.Additive,
+                    RelativeSizeAxes = Axes.Both,
+                    Alpha = 0.2f,
+                }
+            };
+        }
+    }
+}