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osu-lazer/osu.Game.Rulesets.Osu/Replays/OsuAutoGeneratorBase.cs

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2018-01-05 19:21:19 +08:00
// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using OpenTK;
using osu.Game.Beatmaps;
using osu.Game.Rulesets.Osu.Objects;
using System;
using System.Collections.Generic;
using osu.Game.Rulesets.Replays;
using osu.Game.Users;
namespace osu.Game.Rulesets.Osu.Replays
{
public abstract class OsuAutoGeneratorBase : AutoGenerator<OsuHitObject>
{
#region Constants
/// <summary>
/// Constants (for spinners).
/// </summary>
protected static readonly Vector2 SPINNER_CENTRE = new Vector2(256, 192);
protected const float SPIN_RADIUS = 50;
/// <summary>
/// The time in ms between each ReplayFrame.
/// </summary>
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protected readonly double FrameDelay;
#endregion
#region Construction / Initialisation
protected Replay Replay;
protected List<ReplayFrame> Frames => Replay.Frames;
protected OsuAutoGeneratorBase(Beatmap<OsuHitObject> beatmap)
: base(beatmap)
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{
Replay = new Replay
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{
User = new User
{
Username = @"Autoplay",
}
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};
// We are using ApplyModsToRate and not ApplyModsToTime to counteract the speed up / slow down from HalfTime / DoubleTime so that we remain at a constant framerate of 60 fps.
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FrameDelay = ApplyModsToRate(1000.0 / 60.0);
}
#endregion
#region Utilities
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protected double ApplyModsToTime(double v) => v;
protected double ApplyModsToRate(double v) => v;
private class ReplayFrameComparer : IComparer<ReplayFrame>
{
public int Compare(ReplayFrame f1, ReplayFrame f2)
{
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if (f1 == null) throw new ArgumentNullException(nameof(f1));
if (f2 == null) throw new ArgumentNullException(nameof(f2));
return f1.Time.CompareTo(f2.Time);
}
}
private static readonly IComparer<ReplayFrame> replay_frame_comparer = new ReplayFrameComparer();
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protected int FindInsertionIndex(ReplayFrame frame)
{
int index = Frames.BinarySearch(frame, replay_frame_comparer);
if (index < 0)
{
index = ~index;
}
else
{
// Go to the first index which is actually bigger
while (index < Frames.Count && frame.Time == Frames[index].Time)
{
++index;
}
}
return index;
}
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protected void AddFrameToReplay(ReplayFrame frame) => Frames.Insert(FindInsertionIndex(frame), frame);
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protected static Vector2 CirclePosition(double t, double radius) => new Vector2((float)(Math.Cos(t) * radius), (float)(Math.Sin(t) * radius));
#endregion
}
}