Move play modes to their own projects.

osu.Game.Modes.Mania/Objects/ManiaConverter.cs

@@ -0,0 +1,47 @@
+//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 osu.Game.Modes.Objects;
+using osu.Game.Modes.Osu.Objects;
+
+namespace osu.Game.Modes.Mania.Objects
+{
+    class ManiaConverter : HitObjectConverter<ManiaBaseHit>
+    {
+        private readonly int columns;
+
+        public ManiaConverter(int columns)
+        {
+            this.columns = columns;
+        }
+
+        public override List<ManiaBaseHit> Convert(List<HitObject> input)
+        {
+            List<ManiaBaseHit> output = new List<ManiaBaseHit>();
+
+            foreach (HitObject i in input)
+            {
+                ManiaBaseHit h = i as ManiaBaseHit;
+
+                if (h == null)
+                {
+                    OsuBaseHit o = i as OsuBaseHit;
+
+                    if (o == null) throw new HitObjectConvertException(@"Mania", i);
+
+                    h = new Note
+                    {
+                        StartTime = o.StartTime,
+                        Column = (int)Math.Round(o.Position.X / 512 * columns)
+                    };
+                }
+
+                output.Add(h);
+            }
+
+            return output;
+        }
+    }
+}