Add explosion effect when catching fruit

osu.Game.Rulesets.Catch.Tests/TestSceneCatcherArea.cs

@@ -8,7 +8,10 @@ using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics;
+using osu.Framework.Testing;
 using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Catch.Objects.Drawables;
 using osu.Game.Rulesets.Catch.UI;
 using osu.Game.Tests.Visual;
 
@@ -30,6 +33,10 @@ namespace osu.Game.Rulesets.Catch.Tests
             AddToggleStep("Hyperdash", t =>
                 CreatedDrawables.OfType<CatchInputManager>().Select(i => i.Child)
                                 .OfType<TestCatcherArea>().ForEach(c => c.ToggleHyperDash(t)));
+
+            AddRepeatStep("catch fruit", () =>
+                this.ChildrenOfType<CatcherArea>().ForEach(area =>
+                    area.MovableCatcher.PlaceOnPlate(new DrawableFruit(new TestSceneFruitObjects.TestCatchFruit(FruitVisualRepresentation.Grape)))), 20);
         }
 
         private void createCatcher(float size)
@@ -58,6 +65,8 @@ namespace osu.Game.Rulesets.Catch.Tests
             {
             }
 
+            public new Catcher MovableCatcher => base.MovableCatcher;
+
             public void ToggleHyperDash(bool status) => MovableCatcher.SetHyperDashState(status ? 2 : 1);
         }
     }

osu.Game.Rulesets.Catch.Tests/TestSceneFruitObjects.cs

@@ -84,11 +84,7 @@ namespace osu.Game.Rulesets.Catch.Tests
 
         private Drawable createDrawable(FruitVisualRepresentation rep)
         {
-            Fruit fruit = new TestCatchFruit(rep)
+            Fruit fruit = new TestCatchFruit(rep) { Scale = 1.5f };
-            {
-                StartTime = 1000000000000,
-                Scale = 1.5f,
-            };
 
             return new DrawableFruit(fruit)
             {
@@ -101,11 +97,12 @@ namespace osu.Game.Rulesets.Catch.Tests
             };
         }
 
-        private class TestCatchFruit : Fruit
+        public class TestCatchFruit : Fruit
         {
             public TestCatchFruit(FruitVisualRepresentation rep)
             {
                 VisualRepresentation = rep;
+                StartTime = 1000000000000;
             }
 
             public override FruitVisualRepresentation VisualRepresentation { get; }

osu.Game.Rulesets.Catch/UI/CatcherArea.cs

@@ -4,8 +4,10 @@
 using System;
 using System.Linq;
 using osu.Framework.Allocation;
+using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Effects;
 using osu.Framework.Input.Bindings;
 using osu.Framework.Utils;
 using osu.Game.Beatmaps;
@@ -240,6 +242,12 @@ namespace osu.Game.Rulesets.Catch.UI
                 fruit.X = Math.Clamp(fruit.X, -CATCHER_SIZE / 2, CATCHER_SIZE / 2);
 
                 caughtFruit.Add(fruit);
+
+                Add(new HitExplosion(fruit)
+                {
+                    X = fruit.X,
+                    Scale = new Vector2(fruit.HitObject.Scale)
+                });
             }
 
             /// <summary>
@@ -465,4 +473,112 @@ namespace osu.Game.Rulesets.Catch.UI
             }
         }
     }
+
+    public class HitExplosion : CompositeDrawable
+    {
+        private readonly CircularContainer largeFaint;
+
+        public HitExplosion(DrawableCatchHitObject fruit)
+        {
+            Size = new Vector2(20);
+            Anchor = Anchor.TopCentre;
+            Origin = Anchor.BottomCentre;
+
+            Color4 objectColour = fruit.AccentColour.Value;
+
+            // scale roughly in-line with visual appearance of notes
+
+            const float angle_variangle = 15; // should be less than 45
+
+            const float roundness = 100;
+
+            const float initial_height = 10;
+
+            var colour = Interpolation.ValueAt(0.4f, objectColour, Color4.White, 0, 1);
+
+            InternalChildren = new Drawable[]
+            {
+                largeFaint = new CircularContainer
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    Masking = true,
+                    // we want our size to be very small so the glow dominates it.
+                    Size = new Vector2(0.8f),
+                    Blending = BlendingParameters.Additive,
+                    EdgeEffect = new EdgeEffectParameters
+                    {
+                        Type = EdgeEffectType.Glow,
+                        Colour = Interpolation.ValueAt(0.1f, objectColour, Color4.White, 0, 1).Opacity(0.3f),
+                        Roundness = 160,
+                        Radius = 200,
+                    },
+                },
+                new CircularContainer
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    Masking = true,
+                    Blending = BlendingParameters.Additive,
+                    EdgeEffect = new EdgeEffectParameters
+                    {
+                        Type = EdgeEffectType.Glow,
+                        Colour = Interpolation.ValueAt(0.6f, objectColour, Color4.White, 0, 1),
+                        Roundness = 20,
+                        Radius = 50,
+                    },
+                },
+                new CircularContainer
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    Masking = true,
+                    Size = new Vector2(0.01f, initial_height),
+                    Blending = BlendingParameters.Additive,
+                    Rotation = RNG.NextSingle(-angle_variangle, angle_variangle),
+                    EdgeEffect = new EdgeEffectParameters
+                    {
+                        Type = EdgeEffectType.Glow,
+                        Colour = colour,
+                        Roundness = roundness,
+                        Radius = 40,
+                    },
+                },
+                new CircularContainer
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    Masking = true,
+                    Size = new Vector2(0.01f, initial_height),
+                    Blending = BlendingParameters.Additive,
+                    Rotation = RNG.NextSingle(-angle_variangle, angle_variangle),
+                    EdgeEffect = new EdgeEffectParameters
+                    {
+                        Type = EdgeEffectType.Glow,
+                        Colour = colour,
+                        Roundness = roundness,
+                        Radius = 40,
+                    },
+                }
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            const double duration = 400;
+
+            largeFaint
+                .ResizeTo(largeFaint.Size * new Vector2(5, 1), duration, Easing.OutQuint)
+                .FadeOut(duration * 2);
+
+            this.FadeInFromZero(50).Then().FadeOut(duration, Easing.Out);
+            Expire(true);
+        }
+    }
 }