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osu-lazer/osu.Game/Storyboards/CommandTimeline.cs

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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
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using osu.Framework.Caching;
using osu.Framework.Graphics;
using System;
using System.Collections.Generic;
using System.Linq;
namespace osu.Game.Storyboards
{
public class CommandTimeline<T> : ICommandTimeline
{
private readonly List<TypedCommand> commands = new List<TypedCommand>();
public IEnumerable<TypedCommand> Commands => commands.OrderBy(c => c.StartTime);
public bool HasCommands => commands.Count > 0;
private readonly Cached<double> startTimeBacking = new Cached<double>();
public double StartTime => startTimeBacking.IsValid ? startTimeBacking : startTimeBacking.Value = HasCommands ? commands.Min(c => c.StartTime) : double.MinValue;
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private readonly Cached<double> endTimeBacking = new Cached<double>();
public double EndTime => endTimeBacking.IsValid ? endTimeBacking : endTimeBacking.Value = HasCommands ? commands.Max(c => c.EndTime) : double.MaxValue;
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public T StartValue => HasCommands ? commands.OrderBy(c => c.StartTime).First().StartValue : default;
public T EndValue => HasCommands ? commands.OrderByDescending(c => c.EndTime).First().EndValue : default;
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public void Add(Easing easing, double startTime, double endTime, T startValue, T endValue)
{
if (endTime < startTime)
return;
commands.Add(new TypedCommand { Easing = easing, StartTime = startTime, EndTime = endTime, StartValue = startValue, EndValue = endValue, });
startTimeBacking.Invalidate();
endTimeBacking.Invalidate();
}
public override string ToString()
=> $"{commands.Count} command(s)";
public class TypedCommand : ICommand
{
public Easing Easing { get; set; }
public double StartTime { get; set; }
public double EndTime { get; set; }
public double Duration => EndTime - StartTime;
public T StartValue;
public T EndValue;
public int CompareTo(ICommand other)
{
var result = StartTime.CompareTo(other.StartTime);
if (result != 0) return result;
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return EndTime.CompareTo(other.EndTime);
}
public override string ToString()
=> $"{StartTime} -> {EndTime}, {StartValue} -> {EndValue} {Easing}";
}
}
public interface ICommandTimeline
{
double StartTime { get; }
double EndTime { get; }
bool HasCommands { get; }
}
public interface ICommand : IComparable<ICommand>
{
Easing Easing { get; set; }
double StartTime { get; set; }
double EndTime { get; set; }
double Duration { get; }
}
}