osukey/osu.Game.Rulesets.Mania/Beatmaps/DistanceObjectConversion.cs
2017-05-18 13:37:22 +09:00

518 lines
21 KiB
C#

// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using osu.Game.Rulesets.Mania.Objects;
using osu.Game.Beatmaps;
using osu.Game.Beatmaps.Timing;
using osu.Game.Rulesets.Objects;
using osu.Game.Rulesets.Objects.Types;
using System;
using osu.Game.Rulesets.Mania.MathUtils;
using System.Linq;
using OpenTK;
using osu.Game.Database;
using osu.Game.Audio;
namespace osu.Game.Rulesets.Mania.Beatmaps
{
internal class DistanceObjectConversion : ObjectConversion
{
private readonly HitObject originalObject;
private readonly double endTime;
private readonly int repeatCount;
private LegacyConvertType convertType;
public DistanceObjectConversion(HitObject originalObject, ObjectList previousObjects, FastRandom random, Beatmap beatmap)
: base(previousObjects, random, beatmap)
{
this.originalObject = originalObject;
ControlPoint overridePoint;
ControlPoint controlPoint = Beatmap.TimingInfo.TimingPointAt(originalObject.StartTime, out overridePoint);
convertType = LegacyConvertType.None;
if ((overridePoint ?? controlPoint)?.KiaiMode == false)
convertType = LegacyConvertType.LowProbability;
var distanceData = originalObject as IHasDistance;
var repeatsData = originalObject as IHasRepeats;
endTime = distanceData?.EndTime ?? 0;
repeatCount = repeatsData?.RepeatCount ?? 1;
}
public override ObjectList Generate()
{
double segmentDuration = endTime / repeatCount;
if (repeatCount > 1)
{
if (segmentDuration <= 90)
return generateRandomHoldNotes(originalObject.StartTime, endTime, 1);
if (segmentDuration <= 120)
{
convertType |= LegacyConvertType.ForceNotStack;
return generateRandomNotes(originalObject.StartTime, segmentDuration, repeatCount);
}
if (segmentDuration <= 160)
return generateStair(originalObject.StartTime, segmentDuration, repeatCount);
if (segmentDuration <= 200 && conversionDifficulty > 3)
return generateRandomMultipleNotes(originalObject.StartTime, segmentDuration, repeatCount);
double duration = endTime - originalObject.StartTime;
if (duration >= 4000)
return generateNRandomNotes(originalObject.StartTime, endTime, 0.23, 0, 0);
if (segmentDuration > 400 && duration < 4000 && repeatCount < AvailableColumns - 1 - RandomStart)
return generateTiledHoldNotes(originalObject.StartTime, segmentDuration, repeatCount);
return generateHoldAndNormalNotes(originalObject.StartTime, segmentDuration);
}
if (segmentDuration <= 110)
{
if (PreviousObjects.ColumnsFilled < AvailableColumns)
convertType |= LegacyConvertType.ForceNotStack;
else
convertType &= ~LegacyConvertType.ForceNotStack;
return generateRandomNotes(originalObject.StartTime, segmentDuration, segmentDuration < 80 ? 0 : 1);
}
if (conversionDifficulty > 6.5)
{
if ((convertType & LegacyConvertType.LowProbability) > 0)
return generateNRandomNotes(originalObject.StartTime, endTime, 0.78, 0.3, 0);
return generateNRandomNotes(originalObject.StartTime, endTime, 0.85, 0.36, 0.03);
}
if (conversionDifficulty > 4)
{
if ((convertType & LegacyConvertType.LowProbability) > 0)
return generateNRandomNotes(originalObject.StartTime, endTime, 0.43, 0.08, 0);
return generateNRandomNotes(originalObject.StartTime, endTime, 0.56, 0.18, 0);
}
if (conversionDifficulty > 2.5)
{
if ((convertType & LegacyConvertType.LowProbability) > 0)
return generateNRandomNotes(originalObject.StartTime, endTime, 0.3, 0, 0);
return generateNRandomNotes(originalObject.StartTime, endTime, 0.37, 0.08, 0);
}
if ((convertType & LegacyConvertType.LowProbability) > 0)
return generateNRandomNotes(originalObject.StartTime, endTime, 0.17, 0, 0);
return generateNRandomNotes(originalObject.StartTime, endTime, 0.27, 0, 0);
}
/// <summary>
/// Generates random hold notes that start at an span the same amount of rows.
/// </summary>
/// <param name="startTime">Start time of each hold note.</param>
/// <param name="endTime">End time of the hold notes.</param>
/// <param name="noteCount">Number of hold notes.</param>
/// <returns>The <see cref="ObjectList"/> containing the hit objects.</returns>
private ObjectList generateRandomHoldNotes(double startTime, double endTime, int noteCount)
{
// - - - -
// ■ - ■ ■
// □ - □ □
// ■ - ■ ■
var newObjects = new ObjectList();
int usableColumns = AvailableColumns - RandomStart - PreviousObjects.ColumnsFilled;
int nextColumn = Random.Next(RandomStart, AvailableColumns);
for (int i = 0; i < Math.Min(usableColumns, noteCount); i++)
{
while (newObjects.IsFilled(nextColumn) || PreviousObjects.IsFilled(nextColumn)) //find available column
nextColumn = Random.Next(RandomStart, AvailableColumns);
add(newObjects, nextColumn, startTime, endTime, noteCount);
}
// This is can't be combined with the above loop due to RNG
for (int i = 0; i < noteCount - usableColumns; i++)
{
while (newObjects.IsFilled(nextColumn))
nextColumn = Random.Next(RandomStart, AvailableColumns);
add(newObjects, nextColumn, startTime, endTime, noteCount);
}
return newObjects;
}
/// <summary>
/// Generates random notes, with one note per row and no stacking.
/// </summary>
/// <param name="startTime">The start time.</param>
/// <param name="separationTime">The separation of notes between rows.</param>
/// <param name="repeatCount">The number of rows.</param>
/// <returns>The <see cref="ObjectList"/> containing the hit objects.</returns>
private ObjectList generateRandomNotes(double startTime, double separationTime, int repeatCount)
{
// - - - -
// x - - -
// - - x -
// - - - x
// x - - -
var newObjects = new ObjectList();
int nextColumn = GetColumn((originalObject as IHasXPosition)?.X ?? 0, true);
if ((convertType & LegacyConvertType.ForceNotStack) > 0 && PreviousObjects.ColumnsFilled < AvailableColumns)
{
while (PreviousObjects.IsFilled(nextColumn))
nextColumn = Random.Next(RandomStart, AvailableColumns);
}
int lastColumn = nextColumn;
for (int i = 0; i <= repeatCount; i++)
{
add(newObjects, nextColumn, startTime, startTime);
while (nextColumn == lastColumn)
nextColumn = Random.Next(RandomStart, AvailableColumns);
lastColumn = nextColumn;
startTime += separationTime;
}
return newObjects;
}
/// <summary>
/// Generates a stair of notes, with one note per row.
/// </summary>
/// <param name="startTime">The start time.</param>
/// <param name="separationTime">The separation of notes between rows.</param>
/// <param name="repeatCount">The number of rows/notes.</param>
/// <returns>The <see cref="ObjectList"/> containing the hit objects.</returns>
private ObjectList generateStair(double startTime, double separationTime, int repeatCount)
{
// - - - -
// x - - -
// - x - -
// - - x -
// - - - x
// - - x -
// - x - -
// x - - -
var newObjects = new ObjectList();
int column = GetColumn((originalObject as IHasXPosition)?.X ?? 0, true);
bool increasing = Random.NextDouble() > 0.5;
for (int i = 0; i <= repeatCount; i++)
{
add(newObjects, column, startTime, startTime);
startTime += separationTime;
// Check if we're at the borders of the stage, and invert the pattern if so
if (increasing)
{
if (column >= AvailableColumns - 1)
{
increasing = false;
column--;
}
else
column++;
}
else
{
if (column <= RandomStart)
{
increasing = true;
column++;
}
else
column--;
}
}
return newObjects;
}
/// <summary>
/// Generates random notes with 1-2 notes per row and no stacking.
/// </summary>
/// <param name="startTime">The start time.</param>
/// <param name="separationTime">The separation of notes between rows.</param>
/// <param name="repeatCount">The number of rows.</param>
/// <returns>The <see cref="ObjectList"/> containing the hit objects.</returns>
private ObjectList generateRandomMultipleNotes(double startTime, double separationTime, int repeatCount)
{
// - - - -
// x - -
// - x x -
// - - - x
// x - x -
var newObjects = new ObjectList();
bool legacy = AvailableColumns >= 4 && AvailableColumns <= 8;
int interval = Random.Next(1, AvailableColumns - (legacy ? 1 : 0));
int nextColumn = GetColumn((originalObject as IHasXPosition)?.X ?? 0, true);
for (int i = 0; i <= repeatCount; i++)
{
add(newObjects, nextColumn, startTime, startTime, 2);
nextColumn += interval;
if (nextColumn >= AvailableColumns - RandomStart)
nextColumn = nextColumn - AvailableColumns - RandomStart + (legacy ? 1 : 0);
nextColumn += RandomStart;
// If we're in 2K, let's not add many consecutive doubles
if (AvailableColumns > 2)
add(newObjects, nextColumn, startTime, startTime, 2);
nextColumn = Random.Next(RandomStart, AvailableColumns);
startTime += separationTime;
}
return newObjects;
}
/// <summary>
/// Generates random hold notes. The amount of hold notes generated is determined by probabilities.
/// </summary>
/// <param name="startTime">The hold note start time.</param>
/// <param name="endTime">The hold note end time.</param>
/// <param name="p2">The probability required for 2 hold notes to be generated.</param>
/// <param name="p3">The probability required for 3 hold notes to be generated.</param>
/// <param name="p4">The probability required for 4 hold notes to be generated.</param>
/// <returns>The <see cref="ObjectList"/> containing the hit objects.</returns>
private ObjectList generateNRandomNotes(double startTime, double endTime, double p2, double p3, double p4)
{
// - - - -
// ■ - ■ ■
// □ - □ □
// ■ - ■ ■
switch (AvailableColumns)
{
case 2:
p2 = 0;
p3 = 0;
p4 = 0;
break;
case 3:
p2 = Math.Max(p2, 0.1);
p3 = 0;
p4 = 0;
break;
case 4:
p2 = Math.Max(p2, 0.3);
p3 = Math.Max(p3, 0.04);
p4 = 0;
break;
case 5:
p2 = Math.Max(p2, 0.34);
p3 = Math.Max(p3, 0.1);
p4 = Math.Max(p4, 0.03);
break;
}
Func<SampleInfo, bool> isDoubleSample = sample => sample.Name == SampleInfo.HIT_CLAP && sample.Name == SampleInfo.HIT_FINISH;
bool canGenerateTwoNotes = (convertType & LegacyConvertType.LowProbability) == 0;
canGenerateTwoNotes &= originalObject.Samples.Any(isDoubleSample) || sampleInfoListAt(originalObject.StartTime).Any(isDoubleSample);
if (canGenerateTwoNotes)
p2 = 1;
return generateRandomHoldNotes(startTime, endTime, GetRandomNoteCount(p2, p3, p4));
}
/// <summary>
/// Generates tiled hold notes. You can think of this as a stair of hold notes.
/// </summary>
/// <param name="startTime">The first hold note start time.</param>
/// <param name="separationTime">The separation time between hold notes.</param>
/// <param name="noteCount">The amount of hold notes.</param>
/// <returns>The <see cref="ObjectList"/> containing the hit objects.</returns>
private ObjectList generateTiledHoldNotes(double startTime, double separationTime, int noteCount)
{
// - - - -
// ■ ■ ■ ■
// □ □ □ □
// □ □ □ □
// □ □ □ ■
// □ □ ■ -
// □ ■ - -
// ■ - - -
var newObjects = new ObjectList();
int columnRepeat = Math.Min(noteCount, AvailableColumns);
int nextColumn = GetColumn((originalObject as IHasXPosition)?.X ?? 0, true);
if ((convertType & LegacyConvertType.ForceNotStack) > 0 && PreviousObjects.ColumnsFilled < AvailableColumns)
{
while (PreviousObjects.IsFilled(nextColumn))
nextColumn = Random.Next(RandomStart, AvailableColumns);
}
for (int i = 0; i < columnRepeat; i++)
{
while (newObjects.IsFilled(nextColumn))
nextColumn = Random.Next(RandomStart, AvailableColumns);
add(newObjects, nextColumn, startTime, endTime, noteCount);
startTime += separationTime;
}
return newObjects;
}
/// <summary>
/// Generates a hold note alongside normal notes.
/// </summary>
/// <param name="startTime">The start time of notes.</param>
/// <param name="separationTime">The separation time between notes.</param>
/// <returns>The <see cref="ObjectList"/> containing the hit objects.</returns>
private ObjectList generateHoldAndNormalNotes(double startTime, double separationTime)
{
// - - - -
// ■ x x -
// ■ - x x
// ■ x - x
// ■ - x x
var newObjects = new ObjectList();
int holdColumn = GetColumn((originalObject as IHasXPosition)?.X ?? 0, true);
if ((convertType & LegacyConvertType.ForceNotStack) > 0 && PreviousObjects.ColumnsFilled < AvailableColumns)
{
while (PreviousObjects.IsFilled(holdColumn))
holdColumn = Random.Next(RandomStart, AvailableColumns);
}
// Create the hold note
add(newObjects, holdColumn, startTime, separationTime * repeatCount);
int noteCount = 1;
if (conversionDifficulty > 6.5)
noteCount = GetRandomNoteCount(0.63, 0);
else if (conversionDifficulty > 4)
noteCount = GetRandomNoteCount(AvailableColumns < 6 ? 0.12 : 0.45, 0);
else if (conversionDifficulty > 2.5)
noteCount = GetRandomNoteCount(AvailableColumns < 6 ? 0 : 0.24, 0);
noteCount = Math.Min(AvailableColumns - 1, noteCount);
bool ignoreHead = !sampleInfoListAt(startTime).Any(s => s.Name == SampleInfo.HIT_WHISTLE || s.Name == SampleInfo.HIT_FINISH || s.Name == SampleInfo.HIT_CLAP);
int nextColumn = Random.Next(RandomStart, AvailableColumns);
var tempObjects = new ObjectList();
for (int i = 0; i <= repeatCount; i++)
{
if (!(ignoreHead && startTime == originalObject.StartTime))
{
for (int j = 0; j < noteCount; j++)
{
while (tempObjects.IsFilled(nextColumn) || nextColumn == holdColumn)
nextColumn = Random.Next(RandomStart, AvailableColumns);
add(tempObjects, nextColumn, startTime, startTime, noteCount + 1);
}
}
newObjects.Add(tempObjects);
tempObjects.Clear();
startTime += separationTime;
}
return newObjects;
}
/// <summary>
/// Constructs and adds a note to an object list.
/// </summary>
/// <param name="objectList">The list to add to.</param>
/// <param name="column">The column to add the note to.</param>
/// <param name="startTime">The start time of the note.</param>
/// <param name="endTime">The end time of the note (set to <paramref name="startTime"/> for a non-hold note).</param>
/// <param name="siblings">The number of children alongside this note (these will not be generated, but are used for volume calculations).</param>
private void add(ObjectList objectList, int column, double startTime, double endTime, int siblings = 1)
{
ManiaHitObject newObject;
if (startTime == endTime)
{
newObject = new Note
{
StartTime = startTime,
Samples = originalObject.Samples,
Column = column
};
}
else
{
newObject = new HoldNote
{
StartTime = startTime,
Samples = originalObject.Samples,
Column = column,
Duration = endTime - startTime
};
}
// Todo: Consider siblings and write sample volumes (probably at ManiaHitObject level)
objectList.Add(newObject);
}
/// <summary>
/// Retrieves the sample info list at a point in time.
/// </summary>
/// <param name="time">The time to retrieve the sample info list from.</param>
/// <param name="separationTime"></param>
/// <returns></returns>
private SampleInfoList sampleInfoListAt(double time)
{
var curveData = originalObject as IHasCurve;
if (curveData == null)
return originalObject.Samples;
double segmentTime = (curveData.EndTime - originalObject.StartTime) / repeatCount;
int index = (int)(segmentTime == 0 ? 0 : (time - originalObject.StartTime) / segmentTime);
return curveData.RepeatSamples[index];
}
private double? _conversionDifficulty;
/// <summary>
/// A difficulty factor used for various conversion methods from osu!stable.
/// </summary>
private double conversionDifficulty
{
get
{
if (_conversionDifficulty != null)
return _conversionDifficulty.Value;
HitObject lastObject = Beatmap.HitObjects.LastOrDefault();
HitObject firstObject = Beatmap.HitObjects.FirstOrDefault();
double drainTime = (lastObject?.StartTime ?? 0) - (firstObject?.StartTime ?? 0);
drainTime -= Beatmap.EventInfo.TotalBreakTime;
if (drainTime == 0)
drainTime = 10000;
BeatmapDifficulty difficulty = Beatmap.BeatmapInfo.Difficulty;
_conversionDifficulty = ((difficulty.DrainRate + MathHelper.Clamp(difficulty.ApproachRate, 4, 7)) / 1.5 + Beatmap.HitObjects.Count / drainTime * 9f) / 38f * 5f / 1.15;
_conversionDifficulty = Math.Min(_conversionDifficulty.Value, 12);
return _conversionDifficulty.Value;
}
}
}
}