Merge pull request #49 from NeoAdonis/counters

Rolling counters (initial)

osu.Desktop.VisualTests/Tests/TestCaseScoreCounter.cs

@@ -0,0 +1,159 @@
+//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 OpenTK.Input;
+using osu.Framework.GameModes.Testing;
+using osu.Framework.Graphics;
+using osu.Game.Graphics.UserInterface;
+using osu.Framework.Graphics.UserInterface;
+using osu.Framework.Graphics.Transformations;
+using OpenTK;
+using OpenTK.Graphics;
+using osu.Framework.MathUtils;
+using osu.Framework.Graphics.Sprites;
+
+namespace osu.Desktop.Tests
+{
+    class TestCaseScoreCounter : TestCase
+    {
+        public override string Name => @"ScoreCounter";
+
+        public override string Description => @"Tests multiple counters";
+
+        public override void Reset()
+        {
+            base.Reset();
+
+            ScoreCounter uc = new ScoreCounter
+            {
+                Origin = Anchor.TopRight,
+                Anchor = Anchor.TopRight,
+                TextSize = 40,
+                RollingDuration = 1000,
+                RollingEasing = EasingTypes.Out,
+                Count = 0,
+                Position = new Vector2(20, 20),
+                LeadingZeroes = 7,
+            };
+            Add(uc);
+
+            StandardComboCounter sc = new StandardComboCounter
+            {
+                Origin = Anchor.BottomLeft,
+                Anchor = Anchor.BottomLeft,
+                Position = new Vector2(20, 20),
+                IsRollingProportional = true,
+                RollingDuration = 20,
+                PopOutDuration = 250,
+                Count = 0,
+                TextSize = 40,
+            };
+            Add(sc);
+
+            CatchComboCounter cc = new CatchComboCounter
+            {
+                Origin = Anchor.Centre,
+                Anchor = Anchor.Centre,
+                IsRollingProportional = true,
+                RollingDuration = 20,
+                PopOutDuration = 250,
+                Count = 0,
+                TextSize = 40,
+            };
+            Add(cc);
+
+            AlternativeComboCounter ac = new AlternativeComboCounter
+            {
+                Origin = Anchor.BottomLeft,
+                Anchor = Anchor.BottomLeft,
+                Position = new Vector2(20, 80),
+                IsRollingProportional = true,
+                RollingDuration = 20,
+                ScaleFactor = 2,
+                Count = 0,
+                TextSize = 40,
+            };
+            Add(ac);
+
+
+            AccuracyCounter pc = new AccuracyCounter
+            {
+                Origin = Anchor.TopRight,
+                Anchor = Anchor.TopRight,
+                RollingDuration = 1000,
+                RollingEasing = EasingTypes.Out,
+                Count = 100.0f,
+                Position = new Vector2(20, 60),
+            };
+            Add(pc);
+
+            SpriteText text = new SpriteText
+            {
+                Origin = Anchor.BottomLeft,
+                Anchor = Anchor.BottomLeft,
+                Position = new Vector2(20, 190),
+                Text = @"- unset -",
+            };
+            Add(text);
+
+            StarCounter tc = new StarCounter
+            {
+                Origin = Anchor.BottomLeft,
+                Anchor = Anchor.BottomLeft,
+                Position = new Vector2(20, 160),
+            };
+            Add(tc);
+
+            AddButton(@"Reset all", delegate
+            {
+                uc.Count = 0;
+                sc.Count = 0;
+                ac.Count = 0;
+                cc.Count = 0;
+                pc.SetCount(0, 0);
+                tc.Count = 0;
+                text.Text = tc.Count.ToString("0.00");
+            });
+
+            AddButton(@"Hit! :D", delegate
+            {
+                uc.Count += 300 + (ulong)(300.0 * (sc.Count > 0 ? sc.Count - 1 : 0) / 25.0);
+                sc.Count++;
+                ac.Count++;
+                cc.CatchFruit(new Color4(
+                    Math.Max(0.5f, RNG.NextSingle()),
+                    Math.Max(0.5f, RNG.NextSingle()),
+                    Math.Max(0.5f, RNG.NextSingle()),
+                    1)
+                );
+                pc.Numerator++;
+                pc.Denominator++;
+            });
+
+            AddButton(@"miss...", delegate
+            {
+                sc.Count = 0;
+                ac.Count = 0;
+                cc.Count = 0;
+                pc.Denominator++;
+            });
+
+            AddButton(@"Alter stars", delegate
+            {
+                tc.Count = RNG.NextSingle() * (tc.MaxStars + 1);
+                text.Text = tc.Count.ToString("0.00");
+            });
+
+            AddButton(@"Stop counters", delegate
+            {
+                uc.StopRolling();
+                sc.StopRolling();
+                cc.StopRolling();
+                ac.StopRolling();
+                pc.StopRolling();
+                tc.StopRolling();
+            });
+        }
+    }
+}

osu.Desktop.VisualTests/osu.Desktop.VisualTests.csproj

@@ -140,6 +140,7 @@
     <Compile Include="Program.cs" />
     <Compile Include="Tests\TestCaseChatDisplay.cs" />
     <Compile Include="Tests\TestCaseGamefield.cs" />
+    <Compile Include="Tests\TestCaseScoreCounter.cs" />
     <Compile Include="Tests\TestCaseKeyCounter.cs" />
     <Compile Include="Tests\TestCaseMenuButtonSystem.cs" />
     <Compile Include="Tests\TestCaseTextAwesome.cs" />

osu.Game/Graphics/UserInterface/AccuracyCounter.cs

@@ -0,0 +1,102 @@
+//Copyright (c) 2007-2016 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.Transformations;
+using osu.Framework.MathUtils;
+using osu.Framework.Timing;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    /// <summary>
+    /// Used as an accuracy counter. Represented visually as a percentage, internally as a fraction.
+    /// </summary>
+    public class AccuracyCounter : NumericRollingCounter<float>
+    {
+        protected override Type transformType => typeof(TransformAccuracy);
+
+        private long numerator = 0;
+        public long Numerator
+        {
+            get
+            {
+                return numerator;
+            }
+            set
+            {
+                numerator = value;
+                updateCount();
+            }
+        }
+
+        private ulong denominator = 0;
+        public ulong Denominator
+        {
+            get
+            {
+                return denominator;
+            }
+            set
+            {
+                denominator = value;
+                updateCount();
+            }
+        }
+
+        public void SetCount(long num, ulong den)
+        {
+            numerator = num;
+            denominator = den;
+            updateCount();
+        }
+
+        private void updateCount()
+        {
+            Count = Denominator == 0 ? 100.0f : (Numerator * 100.0f) / Denominator;
+        }
+
+        public override void ResetCount()
+        {
+            numerator = 0;
+            denominator = 0;
+            updateCount();
+            StopRolling();
+        }
+
+        protected override string formatCount(float count)
+        {
+            return count.ToString("0.00") + "%";
+        }
+
+        protected class TransformAccuracy : Transform<float>
+        {
+            public override float CurrentValue
+            {
+                get
+                {
+                    double time = Time;
+                    if (time < StartTime) return StartValue;
+                    if (time >= EndTime) return EndValue;
+
+                    return Interpolation.ValueAt(time, StartValue, EndValue, StartTime, EndTime, Easing);
+                }
+            }
+
+            public override void Apply(Drawable d)
+            {
+                base.Apply(d);
+                (d as AccuracyCounter).VisibleCount = CurrentValue;
+            }
+
+            public TransformAccuracy(IClock clock)
+                : base(clock)
+            {
+            }
+        }
+    }
+}

osu.Game/Graphics/UserInterface/AlternativeComboCounter.cs

@@ -0,0 +1,89 @@
+//Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
+//Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using OpenTK;
+using OpenTK.Graphics;
+using osu.Framework.Graphics.Transformations;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    /// <summary>
+    /// Allows tint and vertical scaling animation. Used in osu!taiko and osu!mania.
+    /// </summary>
+    public class AlternativeComboCounter : ULongCounter // btw, I'm terribly bad with names... OUENDAN!
+    {
+        public Color4 OriginalColour;
+        public Color4 TintColour = Color4.OrangeRed;
+        public int TintDuration = 250;
+        public float ScaleFactor = 2;
+        public EasingTypes TintEasing = EasingTypes.None;
+        public bool CanAnimateWhenBackwards = false;
+
+        public AlternativeComboCounter() : base()
+        {
+            IsRollingContinuous = false;
+        }
+
+        public override void Load()
+        {
+            base.Load();
+            countSpriteText.Hide();
+            OriginalColour = Colour;
+        }
+
+        public override void ResetCount()
+        {
+            SetCountWithoutRolling(0);
+        }
+
+        protected override void transformCount(ulong currentValue, ulong newValue)
+        {
+            // Animate rollover only when going backwards
+            if (newValue > currentValue)
+            {
+                updateTransforms(typeof(TransformULongCounter));
+                removeTransforms(typeof(TransformULongCounter));
+                VisibleCount = newValue;
+            }
+            else
+                transformCount(new TransformULongCounter(Clock), currentValue, newValue);
+        }
+
+        protected override ulong getProportionalDuration(ulong currentValue, ulong newValue)
+        {
+            ulong difference = currentValue > newValue ? currentValue - newValue : currentValue - newValue;
+            return difference * RollingDuration;
+        }
+
+        protected virtual void transformAnimate()
+        {
+            countSpriteText.FadeColour(TintColour, 0);
+            countSpriteText.ScaleTo(new Vector2(1, ScaleFactor));
+            countSpriteText.FadeColour(OriginalColour, TintDuration, TintEasing);
+            countSpriteText.ScaleTo(new Vector2(1, 1), TintDuration, TintEasing);
+        }
+
+        protected override void transformVisibleCount(ulong currentValue, ulong newValue)
+        {
+            if (countSpriteText != null)
+            {
+                countSpriteText.Text = newValue.ToString("#,0");
+                if (newValue == 0)
+                {
+                    countSpriteText.FadeOut(TintDuration);
+                    return;
+                }
+                countSpriteText.Show();
+                if (newValue > currentValue || CanAnimateWhenBackwards)
+                {
+                    transformAnimate();
+                }
+            }
+        }
+    }
+}

osu.Game/Graphics/UserInterface/CatchComboCounter.cs

@@ -0,0 +1,60 @@
+//Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
+//Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using OpenTK.Graphics;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    /// <summary>
+    /// Similar to Standard, but without the 'x' and has tinted pop-ups. Used in osu!catch.
+    /// </summary>
+    public class CatchComboCounter : StandardComboCounter
+    {
+        public CatchComboCounter() : base()
+        {
+            CanPopOutWhenBackwards = true;
+        }
+
+        protected override string formatCount(ulong count)
+        {
+            return count.ToString("#,0");
+        }
+
+        protected override void transformCount(ulong currentValue, ulong newValue)
+        {
+            // Animate rollover only when going backwards
+            if (newValue > currentValue)
+            {
+                updateTransforms(typeof(TransformULongCounter));
+                removeTransforms(typeof(TransformULongCounter));
+                VisibleCount = newValue;
+            }
+            else
+            {
+                // Backwards pop-up animation has no tint colour
+                popOutSpriteText.Colour = countSpriteText.Colour;
+                transformCount(new TransformULongCounter(Clock), currentValue, newValue);
+            }
+        }
+
+        /// <summary>
+        /// Increaces counter and tints pop-out before animation.
+        /// </summary>
+        /// <param name="colour">Last grabbed fruit colour.</param>
+        public void CatchFruit(Color4 colour)
+        {
+            popOutSpriteText.Colour = colour;
+            Count++;
+        }
+
+        public override void ResetCount()
+        {
+            base.ResetCount();
+        }
+    }
+}

osu.Game/Graphics/UserInterface/NumericRollingCounter.cs

@@ -0,0 +1,63 @@
+//Copyright (c) 2007-2016 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.Sprites;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    /// <summary>
+    /// Skeleton for a numeric counter with a simple roll-up animation.
+    /// </summary>
+    /// <typeparam name="T">Type of the actual counter.</typeparam>
+    public abstract class NumericRollingCounter<T> : RollingCounter<T>
+    {
+        protected SpriteText countSpriteText;
+
+        protected float textSize = 20.0f;
+        public float TextSize
+        {
+            get { return textSize; }
+            set
+            {
+                textSize = value;
+                updateTextSize();
+            }
+        }
+
+        public override void Load()
+        {
+            base.Load();
+            Children = new Drawable[]
+            {
+                countSpriteText = new SpriteText
+                {
+                    Text = formatCount(Count),
+                    TextSize = this.TextSize,
+                    Anchor = this.Anchor,
+                    Origin = this.Origin,
+                },
+            };
+        }
+
+        protected override void transformVisibleCount(T currentValue, T newValue)
+        {
+            if (countSpriteText != null)
+            {
+                countSpriteText.Text = formatCount(newValue);
+            }
+        }
+
+        protected virtual void updateTextSize()
+        {
+            if (countSpriteText != null)
+                countSpriteText.TextSize = TextSize;
+        }
+    }
+}

osu.Game/Graphics/UserInterface/RollingCounter.cs

@@ -0,0 +1,240 @@
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Transformations;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    /// <summary>
+    /// Skeleton for a counter which value rolls-up in a lapse of time.
+    /// </summary>
+    /// <remarks>
+    /// This class only abstracts the basics to roll-up a value in a lapse of time by using Transforms.
+    /// In order to show a value, you must implement a way to display it, i.e., as a numeric counter or a bar.
+    /// </remarks>
+    /// <typeparam name="T">Type of the actual counter.</typeparam>
+    public abstract class RollingCounter<T> : Container
+    {
+        /// <summary>
+        /// Type of the Transform to use.
+        /// </summary>
+        /// <remarks>
+        /// Must be a subclass of Transform<T>
+        /// </remarks>
+        protected virtual Type transformType => typeof(Transform<T>);
+
+        protected ulong RollingTotalDuration = 0;
+
+        /// <summary>
+        /// If true, each time the Count is updated, it will roll over from the current visible value.
+        /// Else, it will roll up from the current count value.
+        /// </summary>
+        public bool IsRollingContinuous = true;
+
+        /// <summary>
+        /// If true, the roll-up duration will be proportional to the counter.
+        /// </summary>
+        public bool IsRollingProportional = false;
+
+        /// <summary>
+        /// If IsRollingProportional = false, duration in milliseconds for the counter roll-up animation for each
+        /// element; else duration in milliseconds for the counter roll-up animation in total.
+        /// </summary>
+        public ulong RollingDuration = 0;
+
+        /// <summary>
+        /// Easing for the counter rollover animation.
+        /// </summary>
+        public EasingTypes RollingEasing = EasingTypes.None;
+
+        protected T prevVisibleCount;
+        protected T visibleCount;
+
+        /// <summary>
+        /// Value shown at the current moment.
+        /// </summary>
+        public virtual T VisibleCount
+        {
+            get
+            {
+                return visibleCount;
+            }
+            protected set
+            {
+                prevVisibleCount = visibleCount;
+                if (visibleCount.Equals(value))
+                    return;
+                visibleCount = value;
+                transformVisibleCount(prevVisibleCount, value);
+            }
+        }
+
+        protected T prevCount;
+        protected T count;
+
+        /// <summary>
+        /// Actual value of counter.
+        /// </summary>
+        public virtual T Count
+        {
+            get
+            {
+                return count;
+            }
+            set
+            {
+                prevCount = count;
+                count = value;
+                if (Clock != null)
+                {
+                    RollingTotalDuration =
+                        IsRollingProportional
+                            ? getProportionalDuration(VisibleCount, value)
+                            : RollingDuration;
+                    transformCount(IsRollingContinuous ? VisibleCount : prevCount, value);
+                }
+            }
+        }
+
+        protected RollingCounter()
+        {
+            Debug.Assert(
+                transformType.IsSubclassOf(typeof(Transform<T>)) || transformType == typeof(Transform<T>),
+                @"transformType should be a subclass of Transform<T>."
+            );
+        }
+
+        public override void Load()
+        {
+            base.Load();
+            removeTransforms(transformType);
+            if (Count == null)
+                ResetCount();
+            VisibleCount = Count;
+        }
+
+        /// <summary>
+        /// Sets count value, bypassing rollover animation.
+        /// </summary>
+        /// <param name="count">New count value.</param>
+        public virtual void SetCountWithoutRolling(T count)
+        {
+            Count = count;
+            StopRolling();
+        }
+
+        /// <summary>
+        /// Stops rollover animation, forcing the visible count to be the actual count.
+        /// </summary>
+        public virtual void StopRolling()
+        {
+            removeTransforms(transformType);
+            VisibleCount = Count;
+        }
+
+        /// <summary>
+        /// Resets count to default value.
+        /// </summary>
+        public abstract void ResetCount();
+
+        /// <summary>
+        /// Calculates the duration of the roll-up animation by using the difference between the current visible value
+        /// and the new final value.
+        /// </summary>
+        /// <remarks>
+        /// To be used in conjunction with IsRollingProportional = true.
+        /// Unless a derived class needs to have a proportional rolling, it is not necessary to override this function.
+        /// </remarks>
+        /// <param name="currentValue">Current visible value.</param>
+        /// <param name="newValue">New final value.</param>
+        /// <returns>Calculated rollover duration in milliseconds.</returns>
+        protected virtual ulong getProportionalDuration(T currentValue, T newValue)
+        {
+            return RollingDuration;
+        }
+
+        /// <summary>
+        /// Used to format counts.
+        /// </summary>
+        /// <param name="count">Count to format.</param>
+        /// <returns>Count formatted as a string.</returns>
+        protected virtual string formatCount(T count)
+        {
+            return count.ToString();
+        }
+
+        protected void updateTransforms(Type type)
+        {
+            foreach (ITransform t in Transforms.AliveItems)
+                if (t.GetType() == type)
+                    t.Apply(this);
+        }
+
+        protected void removeTransforms(Type type)
+        {
+            Transforms.RemoveAll(t => t.GetType() == type);
+        }
+
+        /// <summary>
+        /// Called when the count is updated to add a transformer that changes the value of the visible count (i.e.
+        /// implement the rollover animation).
+        /// </summary>
+        /// <param name="currentValue">Count value before modification.</param>
+        /// <param name="newValue">Expected count value after modification-</param>
+        /// <remarks>
+        /// Unless you need to set a custom animation according to the current or new value of the count, the
+        /// recommended approach is to call transformCount(CustomTransformer(Clock), currentValue, newValue), where
+        /// CustomTransformer is of type transformerType.
+        /// By using this approach, there is no need to check if the Clock is not null; this validation is done before
+        /// adding the transformer.
+        /// </remarks>
+        /// <seealso cref="transformType"/>
+        protected virtual void transformCount(T currentValue, T newValue)
+        {
+            object[] parameters = { Clock };
+            transformCount((Transform<T>)Activator.CreateInstance(transformType, parameters), currentValue, newValue);
+        }
+
+        /// <summary>
+        /// Intended to be used by transformCount().
+        /// </summary>
+        /// <see cref="transformCount"/>
+        protected void transformCount(Transform<T> transform, T currentValue, T newValue)
+        {
+            Type type = transform.GetType();
+
+            updateTransforms(type);
+            removeTransforms(type);
+
+            if (Clock == null)
+                return;
+
+            if (RollingDuration == 0)
+            {
+                VisibleCount = Count;
+                return;
+            }
+
+            transform.StartTime = Time;
+            transform.EndTime = Time + RollingTotalDuration;
+            transform.StartValue = currentValue;
+            transform.EndValue = newValue;
+            transform.Easing = RollingEasing;
+
+            Transforms.Add(transform);
+        }
+
+        /// <summary>
+        /// This procedure is called each time the visible count value is updated.
+        /// Override to create custom animations.
+        /// </summary>
+        /// <param name="currentValue">Visible count value before modification.</param>
+        /// <param name="newValue">Expected visible count value after modification-</param>
+        protected abstract void transformVisibleCount(T currentValue, T newValue);
+    }
+}

osu.Game/Graphics/UserInterface/ScoreCounter.cs

@@ -0,0 +1,30 @@
+//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;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    public class ScoreCounter : ULongCounter
+    {
+        /// <summary>
+        /// How many leading zeroes the counter will have.
+        /// </summary>
+        public uint LeadingZeroes = 0;
+
+        public override void Load()
+        {
+            base.Load();
+            countSpriteText.FixedWidth = true;
+        }
+
+        protected override string formatCount(ulong count)
+        {
+            return count.ToString("D" + LeadingZeroes);
+        }
+    }
+}

osu.Game/Graphics/UserInterface/StandardComboCounter.cs

@@ -0,0 +1,108 @@
+//Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
+//Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Graphics.Transformations;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    /// <summary>
+    /// Uses the 'x' symbol and has a pop-out effect while rolling over. Used in osu! standard.
+    /// </summary>
+    public class StandardComboCounter : ULongCounter
+    {
+        public SpriteText popOutSpriteText;
+
+        public ulong PopOutDuration = 0;
+        public float PopOutBigScale = 2.0f;
+        public float PopOutSmallScale = 1.2f;
+        public EasingTypes PopOutEasing = EasingTypes.None;
+        public bool CanPopOutWhenBackwards = false;
+        public float PopOutInitialAlpha = 0.75f;
+
+        public StandardComboCounter() : base()
+        {
+            IsRollingContinuous = false;
+        }
+
+        public override void Load()
+        {
+            base.Load();
+            countSpriteText.Alpha = 0;
+            Add(popOutSpriteText = new SpriteText
+            {
+                Text = formatCount(Count),
+                Origin = this.Origin,
+                Anchor = this.Anchor,
+                TextSize = this.TextSize,
+                Alpha = 0,
+            });
+        }
+
+        protected override void updateTextSize()
+        {
+            base.updateTextSize();
+            if (popOutSpriteText != null)
+                popOutSpriteText.TextSize = this.TextSize;
+        }
+
+
+        protected override void transformCount(ulong currentValue, ulong newValue)
+        {
+            // Animate rollover only when going backwards
+            if (newValue > currentValue)
+            {
+                updateTransforms(typeof(TransformULongCounter));
+                removeTransforms(typeof(TransformULongCounter));
+                VisibleCount = newValue;
+            }
+            else
+                transformCount(new TransformULongCounter(Clock), currentValue, newValue);
+        }
+
+        protected override ulong getProportionalDuration(ulong currentValue, ulong newValue)
+        {
+            ulong difference = currentValue > newValue ? currentValue - newValue : currentValue - newValue;
+            return difference * RollingDuration;
+        }
+
+        protected override string formatCount(ulong count)
+        {
+            return count.ToString("#,0") + "x";
+        }
+
+        protected virtual void transformPopOut()
+        {
+            countSpriteText.ScaleTo(PopOutSmallScale);
+            countSpriteText.ScaleTo(1, PopOutDuration, PopOutEasing);
+
+            popOutSpriteText.ScaleTo(PopOutBigScale);
+            popOutSpriteText.FadeTo(PopOutInitialAlpha);
+            popOutSpriteText.ScaleTo(1, PopOutDuration, PopOutEasing);
+            popOutSpriteText.FadeOut(PopOutDuration, PopOutEasing);
+        }
+
+        protected override void transformVisibleCount(ulong currentValue, ulong newValue)
+        {
+            if (countSpriteText != null && popOutSpriteText != null)
+            {
+                countSpriteText.Text = popOutSpriteText.Text = formatCount(newValue);
+                if (newValue == 0)
+                {
+                    countSpriteText.FadeOut(PopOutDuration);
+                }
+                else
+                {
+                    countSpriteText.Show();
+                    if (newValue > currentValue || CanPopOutWhenBackwards)
+                        transformPopOut();
+                }
+            }
+        }
+    }
+}

osu.Game/Graphics/UserInterface/StarCounter.cs

@@ -0,0 +1,202 @@
+//Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
+//Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using OpenTK;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Transformations;
+using osu.Framework.MathUtils;
+using osu.Framework.Timing;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    /// <summary>
+    /// Shows a float count as stars. Used as star difficulty display.
+    /// </summary>
+    public class StarCounter : RollingCounter<float>
+    {
+        protected override Type transformType => typeof(TransformStarCounter);
+
+        protected Container starContainer;
+        protected List<TextAwesome> stars = new List<TextAwesome>();
+
+        public ulong StarAnimationDuration = 500;
+        public EasingTypes StarAnimationEasing = EasingTypes.OutElasticHalf;
+        public ulong FadeDuration = 100;
+        public float MinStarSize = 0.3f;
+        public float MinStarAlpha = 0.5f;
+        public int MaxStars = 10;
+        public int StarSize = 20;
+        public int StarSpacing = 4;
+
+        public StarCounter() : base()
+        {
+            IsRollingProportional = true;
+            RollingDuration = 150;
+        }
+
+        protected override ulong getProportionalDuration(float currentValue, float newValue)
+        {
+            return (ulong)(Math.Abs(currentValue - newValue) * RollingDuration);
+        }
+
+        public override void ResetCount()
+        {
+            Count = 0;
+            StopRolling();
+        }
+
+        public override void Load()
+        {
+            base.Load();
+
+            Children = new Drawable[]
+            {
+                starContainer = new Container
+                {
+                    Anchor = Anchor.CentreLeft,
+                    Origin = Anchor.CentreLeft,
+                    Width = MaxStars * StarSize + Math.Max(MaxStars - 1, 0) * StarSpacing,
+                    Height = StarSize,
+                }
+            };
+
+            for (int i = 0; i < MaxStars; i++)
+            {
+                TextAwesome star = new TextAwesome
+                {
+                    Icon = FontAwesome.star,
+                    Anchor = Anchor.CentreLeft,
+                    Origin = Anchor.Centre,
+                    TextSize = StarSize,
+                    Scale = new Vector2(MinStarSize),
+                    Alpha = (i == 0) ? 1.0f : MinStarAlpha,
+                    Position = new Vector2((StarSize + StarSpacing) * i + (StarSize + StarSpacing) / 2, 0),
+                };
+                stars.Add(star);
+                starContainer.Add(star);
+            }
+
+            ResetCount();
+        }
+
+        protected override void transformCount(float currentValue, float newValue)
+        {
+            transformStar((int)Math.Floor(currentValue), currentValue, currentValue < newValue);
+            transformCount(new TransformStarCounter(Clock), currentValue, newValue);
+        }
+
+        protected void updateTransformStar(int i)
+        {
+            foreach (ITransform t in stars[i].Transforms.AliveItems)
+                if (t.GetType() == typeof(TransformAlpha) || t.GetType() == typeof(TransformScaleVector))
+                    t.Apply(stars[i]);
+
+            stars[i].Transforms.RemoveAll(t =>
+                t.GetType() == typeof(TransformScaleVector) || t.GetType() == typeof(TransformAlpha)
+            );
+        }
+
+        protected void transformStarScale(int i, TransformScaleVector transform, bool isIncrement, double startTime)
+        {
+            transform.StartTime = startTime;
+            transform.EndTime = transform.StartTime + StarAnimationDuration;
+            transform.StartValue = stars[i].Scale;
+            transform.EndValue = new Vector2(
+                Interpolation.ValueAt(
+                    Math.Min(Math.Max(i, Count), i + 1),
+                    MinStarSize,
+                    1.0f,
+                    i,
+                    i + 1
+                )
+            );
+            transform.Easing = StarAnimationEasing;
+
+            stars[i].Transforms.Add(transform);
+        }
+
+        protected void transformStarAlpha(int i, TransformAlpha transform, bool isIncrement, double startTime)
+        {
+            transform.StartTime = startTime;
+            //if (!isIncrement)
+                //transform.StartTime += StarAnimationDuration - FadeDuration;
+            transform.EndTime = transform.StartTime + FadeDuration;
+            transform.StartValue = stars[i].Alpha;
+            transform.EndValue = i < Count ? 1.0f : MinStarAlpha;
+
+            stars[i].Transforms.Add(transform);
+        }
+
+
+        protected void transformStar(int i, float value, bool isIncrement)
+        {
+            if (i >= MaxStars)
+                return;
+
+            if (Clock == null)
+                return;
+
+            // Calculate time where animation should had started
+            double startTime = Time;
+            // If incrementing, animation should had started when VisibleCount crossed start of star (i)
+            if (isIncrement)
+                startTime -= i == (int)Math.Floor(prevCount) ?
+                    getProportionalDuration(prevCount, value) : getProportionalDuration(i, value);
+            // If decrementing, animation should had started when VisibleCount crossed end of star (i + 1)
+            else
+                startTime -= i == (int)Math.Floor(prevCount) ?
+                    getProportionalDuration(prevCount, value) : getProportionalDuration(i + 1, value);
+
+            updateTransformStar(i);
+
+            transformStarScale(i, new TransformScaleVector(Clock), isIncrement, startTime);
+            transformStarAlpha(i, new TransformAlpha(Clock), isIncrement, startTime);
+        }
+
+        protected override void transformVisibleCount(float currentValue, float newValue)
+        {
+            // Detect increment that passes over an integer value
+            if (Math.Ceiling(currentValue) <= Math.Floor(newValue))
+                for (int i = (int)Math.Ceiling(currentValue); i <= Math.Floor(newValue); i++)
+                    transformStar(i, newValue, true);
+
+            // Detect decrement that passes over an integer value
+            if (Math.Floor(currentValue) >= Math.Ceiling(newValue))
+                for (int i = (int)Math.Floor(newValue); i < Math.Floor(currentValue); i++)
+                    transformStar(i, newValue, false);
+        }
+
+        protected class TransformStarCounter : Transform<float>
+        {
+            public override float CurrentValue
+            {
+                get
+                {
+                    double time = Time;
+                    if (time < StartTime) return StartValue;
+                    if (time >= EndTime) return EndValue;
+
+                    return Interpolation.ValueAt(time, StartValue, EndValue, StartTime, EndTime, Easing);
+                }
+            }
+
+            public override void Apply(Drawable d)
+            {
+                base.Apply(d);
+                (d as StarCounter).VisibleCount = CurrentValue;
+            }
+
+            public TransformStarCounter(IClock clock)
+            : base(clock)
+            {
+            }
+        }
+    }
+}

osu.Game/Graphics/UserInterface/ULongCounter.cs

@@ -0,0 +1,59 @@
+//Copyright (c) 2007-2016 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.Transformations;
+using osu.Framework.MathUtils;
+using osu.Framework.Timing;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    /// <summary>
+    /// A simple rolling counter that accepts unsigned long values.
+    /// </summary>
+    public class ULongCounter : NumericRollingCounter<ulong>
+    {
+        protected override Type transformType => typeof(TransformULongCounter);
+
+        public override void ResetCount()
+        {
+            SetCountWithoutRolling(0);
+        }
+
+        protected override string formatCount(ulong count)
+        {
+            return count.ToString("#,0");
+        }
+
+        protected class TransformULongCounter : Transform<ulong>
+        {
+            public override ulong CurrentValue
+            {
+                get
+                {
+                    double time = Time;
+                    if (time < StartTime) return StartValue;
+                    if (time >= EndTime) return EndValue;
+
+                    return (ulong)Interpolation.ValueAt(time, StartValue, EndValue, StartTime, EndTime, Easing);
+                }
+            }
+
+            public override void Apply(Drawable d)
+            {
+                base.Apply(d);
+                (d as ULongCounter).VisibleCount = CurrentValue;
+            }
+
+            public TransformULongCounter(IClock clock)
+                : base(clock)
+            {
+            }
+        }
+    }
+}

osu.Game/osu.Game.csproj

@@ -108,10 +108,19 @@
     <Compile Include="Graphics\Cursor\OsuCursorContainer.cs" />
     <Compile Include="Graphics\Processing\RatioAdjust.cs" />
     <Compile Include="Graphics\TextAwesome.cs" />
+    <Compile Include="Graphics\UserInterface\AlternativeComboCounter.cs" />
+    <Compile Include="Graphics\UserInterface\RollingCounter.cs" />
     <Compile Include="Graphics\UserInterface\KeyCounter.cs" />
     <Compile Include="Graphics\UserInterface\KeyCounterKeyboard.cs" />
     <Compile Include="Graphics\UserInterface\KeyCounterCollection.cs" />
     <Compile Include="Graphics\UserInterface\KeyCounterMouse.cs" />
+    <Compile Include="Graphics\UserInterface\AccuracyCounter.cs" />
+    <Compile Include="Graphics\UserInterface\NumericRollingCounter.cs" />
+    <Compile Include="Graphics\UserInterface\ScoreCounter.cs" />
+    <Compile Include="Graphics\UserInterface\CatchComboCounter.cs" />
+    <Compile Include="Graphics\UserInterface\StandardComboCounter.cs" />
+    <Compile Include="Graphics\UserInterface\StarCounter.cs" />
+    <Compile Include="Graphics\UserInterface\ULongCounter.cs" />
     <Compile Include="Online\API\APIAccess.cs" />
     <Compile Include="Online\API\APIRequest.cs" />
     <Compile Include="Online\API\OAuth.cs" />