Remove CatcherArea abstraction

Also fixes catcher size being relative to aspect ratio.

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

@@ -0,0 +1,193 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using System.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Graphics.Textures;
+using osu.Framework.Input.Bindings;
+using osu.Framework.MathUtils;
+using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Catch.UI
+{
+    public class Catcher : Container, IKeyBindingHandler<CatchAction>
+    {
+        private Texture texture;
+
+        private Container<DrawableHitObject> caughtFruit;
+
+        public Container ExplodingFruitTarget;
+
+        [BackgroundDependencyLoader]
+        private void load(TextureStore textures)
+        {
+            texture = textures.Get(@"Play/Catch/fruit-catcher-idle");
+
+            Children = new Drawable[]
+            {
+                createCatcherSprite(),
+                caughtFruit = new Container<DrawableHitObject>
+                {
+                    Anchor = Anchor.TopCentre,
+                    Origin = Anchor.BottomCentre,
+                }
+            };
+        }
+
+        private int currentDirection;
+
+        private bool dashing;
+
+        protected bool Dashing
+        {
+            get { return dashing; }
+            set
+            {
+                if (value == dashing) return;
+
+                dashing = value;
+
+                if (dashing)
+                    Schedule(addAdditiveSprite);
+            }
+        }
+
+        private void addAdditiveSprite()
+        {
+            if (!dashing) return;
+
+            var additive = createCatcherSprite();
+
+            additive.RelativePositionAxes = Axes.Both;
+            additive.Blending = BlendingMode.Additive;
+            additive.Position = Position;
+            additive.Scale = Scale;
+
+            ((Container)Parent).Add(additive);
+
+            additive.FadeTo(0.4f).FadeOut(800, Easing.OutQuint).Expire();
+
+            Scheduler.AddDelayed(addAdditiveSprite, 50);
+        }
+
+        private Sprite createCatcherSprite() => new Sprite
+        {
+            RelativeSizeAxes = Axes.Both,
+            FillMode = FillMode.Fit,
+            Texture = texture,
+            OriginPosition = new Vector2(DrawWidth / 2, 10) //temporary until the sprite is aligned correctly.
+        };
+
+        public bool OnPressed(CatchAction action)
+        {
+            switch (action)
+            {
+                case CatchAction.MoveLeft:
+                    currentDirection--;
+                    return true;
+                case CatchAction.MoveRight:
+                    currentDirection++;
+                    return true;
+                case CatchAction.Dash:
+                    Dashing = true;
+                    return true;
+            }
+
+            return false;
+        }
+
+        public bool OnReleased(CatchAction action)
+        {
+            switch (action)
+            {
+                case CatchAction.MoveLeft:
+                    currentDirection++;
+                    return true;
+                case CatchAction.MoveRight:
+                    currentDirection--;
+                    return true;
+                case CatchAction.Dash:
+                    Dashing = false;
+                    return true;
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// The relative space to cover in 1 millisecond. based on 1 game pixel per millisecond as in osu-stable.
+        /// </summary>
+        private const double base_speed = 1.0 / 512;
+
+        protected override void Update()
+        {
+            base.Update();
+
+            if (currentDirection == 0) return;
+
+            double dashModifier = Dashing ? 1 : 0.5;
+
+            Scale = new Vector2(Math.Sign(currentDirection), 1);
+            X = (float)MathHelper.Clamp(X + Math.Sign(currentDirection) * Clock.ElapsedFrameTime * base_speed * dashModifier, 0, 1);
+        }
+
+        public void Add(DrawableHitObject fruit, Vector2 absolutePosition)
+        {
+            fruit.RelativePositionAxes = Axes.None;
+            fruit.Position = new Vector2(ToLocalSpace(absolutePosition).X - DrawSize.X / 2, 0);
+
+            fruit.Anchor = Anchor.TopCentre;
+            fruit.Origin = Anchor.BottomCentre;
+            fruit.Scale *= 0.7f;
+            fruit.LifetimeEnd = double.MaxValue;
+
+            float distance = fruit.DrawSize.X / 2 * fruit.Scale.X;
+
+            while (caughtFruit.Any(f => f.LifetimeEnd == double.MaxValue && Vector2Extensions.DistanceSquared(f.Position, fruit.Position) < distance * distance))
+            {
+                fruit.X += RNG.Next(-5, 5);
+                fruit.Y -= RNG.Next(0, 5);
+            }
+
+            caughtFruit.Add(fruit);
+
+            if (((CatchBaseHit)fruit.HitObject).LastInCombo)
+                explode();
+        }
+
+        private void explode()
+        {
+            var fruit = caughtFruit.ToArray();
+
+            foreach (var f in fruit)
+            {
+                var originalX = f.X * Scale.X;
+
+                if (ExplodingFruitTarget != null)
+                {
+                    f.Anchor = Anchor.TopLeft;
+                    f.Position = caughtFruit.ToSpaceOfOtherDrawable(f.DrawPosition, ExplodingFruitTarget);
+
+                    caughtFruit.Remove(f);
+
+                    ExplodingFruitTarget.Add(f);
+                }
+
+                f.MoveToY(f.Y - 50, 250, Easing.OutSine)
+                .Then()
+                .MoveToY(f.Y + 50, 500, Easing.InSine);
+
+                f.MoveToX(f.X + originalX * 6, 1000);
+                f.FadeOut(750);
+
+                f.Expire();
+            }
+        }
+    }
+}