osu/osu.Game.Rulesets.Osu/Difficulty/Skills/Speed.cs

40 lines
1.6 KiB
C#

// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using osu.Game.Rulesets.Osu.Difficulty.Preprocessing;
namespace osu.Game.Rulesets.Osu.Difficulty.Skills
{
/// <summary>
/// Represents the skill required to press keys with regards to keeping up with the speed at which objects need to be hit.
/// </summary>
public class Speed : Skill
{
protected override double SkillMultiplier => 1400;
protected override double StrainDecayBase => 0.3;
private const double single_spacing_threshold = 125;
private const double stream_spacing_threshold = 110;
private const double almost_diameter = 90;
protected override double StrainValueOf(OsuDifficultyHitObject current)
{
double distance = current.Distance;
double speedValue;
if (distance > single_spacing_threshold)
speedValue = 2.5;
else if (distance > stream_spacing_threshold)
speedValue = 1.6 + 0.9 * (distance - stream_spacing_threshold) / (single_spacing_threshold - stream_spacing_threshold);
else if (distance > almost_diameter)
speedValue = 1.2 + 0.4 * (distance - almost_diameter) / (stream_spacing_threshold - almost_diameter);
else if (distance > almost_diameter / 2)
speedValue = 0.95 + 0.25 * (distance - almost_diameter / 2) / (almost_diameter / 2);
else
speedValue = 0.95;
return speedValue / current.DeltaTime;
}
}
}