osu/osu.Game.Rulesets.Mania/Difficulty/Skills/Overall.cs
2019-12-14 18:16:13 +08:00

57 lines
2.1 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 osu.Game.Rulesets.Difficulty.Preprocessing;
using osu.Game.Rulesets.Difficulty.Skills;
using osu.Game.Rulesets.Mania.Difficulty.Preprocessing;
using osu.Game.Rulesets.Objects;
namespace osu.Game.Rulesets.Mania.Difficulty.Skills
{
public class Overall : Skill
{
protected override double SkillMultiplier => 1;
protected override double StrainDecayBase => 0.3;
private readonly double[] holdEndTimes;
private readonly int columnCount;
public Overall(int columnCount)
{
this.columnCount = columnCount;
holdEndTimes = new double[columnCount];
}
protected override double StrainValueOf(DifficultyHitObject current)
{
var maniaCurrent = (ManiaDifficultyHitObject)current;
var endTime = maniaCurrent.BaseObject.GetEndTime();
double holdFactor = 1.0; // Factor in case something else is held
double holdAddition = 0; // Addition to the current note in case it's a hold and has to be released awkwardly
for (int i = 0; i < columnCount; i++)
{
// If there is at least one other overlapping end or note, then we get an addition, buuuuuut...
if (current.BaseObject.StartTime < holdEndTimes[i] && endTime > holdEndTimes[i])
holdAddition = 1.0;
// ... this addition only is valid if there is _no_ other note with the same ending.
// Releasing multiple notes at the same time is just as easy as releasing one
if (endTime == holdEndTimes[i])
holdAddition = 0;
// We give a slight bonus if something is held meanwhile
if (holdEndTimes[i] > endTime)
holdFactor = 1.25;
}
holdEndTimes[maniaCurrent.BaseObject.Column] = endTime;
return (1 + holdAddition) * holdFactor;
}
}
}