Add initial implementation of osu! HitCircle.

osu.Desktop.VisualTests/Tests/TestCaseHitObjects.cs

@@ -0,0 +1,65 @@
+//Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
+//Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using osu.Framework;
+using osu.Framework.GameModes.Testing;
+using osu.Framework.Timing;
+using osu.Framework.Graphics;
+using osu.Game.Beatmaps.Objects.Osu;
+using osu.Game.Beatmaps.Objects.Osu.Drawable;
+
+namespace osu.Desktop.Tests
+{
+    class TestCaseHitObjects : TestCase
+    {
+        public override string Name => @"Hit Objects";
+
+        IFrameBasedClock ourClock;
+
+        protected override IFrameBasedClock Clock => ourClock;
+
+        public override void Load(BaseGame game)
+        {
+            base.Load(game);
+
+            var swClock = new StopwatchClock(true) { Rate = 1 };
+            ourClock = new FramedClock(swClock);
+        }
+
+        public override void Reset()
+        {
+            base.Reset();
+
+            ourClock.ProcessFrame();
+
+            for (int i = 0; i < 20; i++)
+            {
+                var h = new Circle
+                {
+                    StartTime = ourClock.CurrentTime + 1000 + i * 80,
+                    Position = new OpenTK.Vector2(i * 14),
+                };
+
+                Add(new DrawableCircle(h)
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Depth = -i,
+                    State = HitState.Armed,
+                });
+            }
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+            ourClock.ProcessFrame();
+
+        }
+    }
+}