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osu-lazer/osu.Game/Rulesets/Timing/MultiplierControlPoint.cs
2019-08-28 20:22:16 +09:00

66 lines
2.7 KiB
C#

// 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.
using System;
using osu.Game.Beatmaps.ControlPoints;
using osu.Game.IO.Serialization;
namespace osu.Game.Rulesets.Timing
{
/// <summary>
/// A control point which adds an aggregated multiplier based on the provided <see cref="TimingPoint"/>'s BeatLength and <see cref="DifficultyPoint"/>'s SpeedMultiplier.
/// </summary>
public class MultiplierControlPoint : IJsonSerializable, IComparable<MultiplierControlPoint>
{
/// <summary>
/// The time in milliseconds at which this <see cref="MultiplierControlPoint"/> starts.
/// </summary>
public double StartTime;
/// <summary>
/// The aggregate multiplier which this <see cref="MultiplierControlPoint"/> provides.
/// </summary>
public double Multiplier => Velocity * DifficultyPoint.SpeedMultiplier * BaseBeatLength / TimingPoint.BeatLength;
/// <summary>
/// The base beat length to scale the <see cref="TimingPoint"/> provided multiplier relative to.
/// </summary>
/// <example>For a <see cref="BaseBeatLength"/> of 1000, a <see cref="TimingPoint"/> with a beat length of 500 will increase the multiplier by 2.</example>
public double BaseBeatLength = TimingControlPoint.DEFAULT_BEAT_LENGTH;
/// <summary>
/// The velocity multiplier.
/// </summary>
public double Velocity = 1;
/// <summary>
/// The <see cref="TimingControlPoint"/> that provides the timing information for this <see cref="MultiplierControlPoint"/>.
/// </summary>
public TimingControlPoint TimingPoint = new TimingControlPoint();
/// <summary>
/// The <see cref="DifficultyControlPoint"/> that provides additional difficulty information for this <see cref="MultiplierControlPoint"/>.
/// </summary>
public DifficultyControlPoint DifficultyPoint = new DifficultyControlPoint();
/// <summary>
/// Creates a <see cref="MultiplierControlPoint"/>. This is required for JSON serialization
/// </summary>
public MultiplierControlPoint()
{
}
/// <summary>
/// Creates a <see cref="MultiplierControlPoint"/>.
/// </summary>
/// <param name="startTime">The start time of this <see cref="MultiplierControlPoint"/>.</param>
public MultiplierControlPoint(double startTime)
{
StartTime = startTime;
}
// ReSharper disable once ImpureMethodCallOnReadonlyValueField
public int CompareTo(MultiplierControlPoint other) => StartTime.CompareTo(other?.StartTime);
}
}