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Code Issues Releases Wiki Activity

Use past objects for note density

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apollo-dw 2022-08-10 19:09:42 +01:00
parent 3c38c9e2a7
commit e6193e8b98
1 changed files with 26 additions and 34 deletions
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60
osu.Game.Rulesets.Osu/Difficulty/Evaluators/CognitionEvaluator.cs
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@ -3,6 +3,7 @@
using System;
using System.Collections.Generic;
using FFmpeg.AutoGen;
using osu.Framework.Extensions.ObjectExtensions;
using osu.Game.Rulesets.Difficulty.Preprocessing;
using osu.Game.Rulesets.Osu.Difficulty.Preprocessing;
@ -12,6 +13,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
{
public static class CognitionEvaluator
{
private const double cognition_window_size = 2000;
public static double EvaluateDifficultyOf(DifficultyHitObject current, bool hidden)
{
if (current.BaseObject is Spinner || current.Index == 0)
@ -20,44 +23,33 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
var currObj = (OsuDifficultyHitObject)current;
double currVelocity = currObj.LazyJumpDistance / currObj.StrainTime;
List<DifficultyHitObject> pastVisibleObjects = retrievePastVisibleObjects(currObj);
List<DifficultyHitObject> currentVisibleObjects = retrieveCurrentVisibleObjects(currObj);
List<OsuDifficultyHitObject> pastVisibleObjects = retrievePastVisibleObjects(currObj);
List<OsuDifficultyHitObject> currentVisibleObjects = retrieveCurrentVisibleObjects(currObj);
// Rather than note density being the number of on-screen objects visible at the current object,
// consider it as how many objects the current object has been visible for.
double noteDensity = 1.0;
double noteDensityDifficulty = 1.0;
double loopOpacity = 1.0;
int previousIndex = 0;
while (loopOpacity > 0)
foreach (var loopObj in pastVisibleObjects)
{
var loopObj = (OsuDifficultyHitObject)currObj.Previous(previousIndex);
var prevLoopObj = (OsuDifficultyHitObject)loopObj.Previous(0);
if (loopObj.IsNull())
break;
double loopDifficulty = currObj.OpacityAt(loopObj.BaseObject.StartTime, false);
loopOpacity = currObj.OpacityAt(loopObj.StartTime, false);
// Small distances means objects may be cheesed, so it doesn't matter whether they are arranged confusingly.
loopDifficulty *= logistic((loopObj.MinimumJumpDistance - 125) / 15);
if (loopOpacity <= 0)
break;
// Objects that are arranged in a mostly-linear fashion should be easy to read (such as circles in a stream).
//if (loopObj.Angle.IsNotNull() && prevLoopObj.Angle.IsNotNull())
// loopDifficulty *= 1 - Math.Pow(Math.Sin(0.5 * loopObj.Angle.Value), 5);
noteDensity += loopOpacity;
previousIndex++;
noteDensityDifficulty += loopDifficulty;
}
double noteDensityDifficulty = Math.Pow(Math.Max(0, noteDensity - 2), 2);
noteDensityDifficulty = Math.Pow(3 * Math.Log(Math.Max(1, noteDensityDifficulty - 1)), 2.3);
double hiddenDifficulty = 0;
if (hidden)
{
noteDensityDifficulty *= 3.2;
// Really not sure about this, but without this a lot of normal HD plays become underweight.
hiddenDifficulty = 7 * currObj.LazyJumpDistance / currObj.StrainTime;
}
double preemptDifficulty = 0.0;
if (currObj.preempt < 400)
preemptDifficulty += Math.Pow(400 - currObj.preempt, 1.5) / 14;
@ -72,18 +64,18 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
// Returns a list of objects that are visible on screen at
// the point in time at which the current object becomes visible.
private static List<DifficultyHitObject> retrievePastVisibleObjects(OsuDifficultyHitObject current)
private static List<OsuDifficultyHitObject> retrievePastVisibleObjects(OsuDifficultyHitObject current)
{
List<DifficultyHitObject> objects = new List<DifficultyHitObject>();
List<OsuDifficultyHitObject> objects = new List<OsuDifficultyHitObject>();
for (int i = 0; i < current.Index; i++)
{
DifficultyHitObject currentObj = current.Previous(i);
OsuDifficultyHitObject loopObj = (OsuDifficultyHitObject)current.Previous(i);
if (current.OpacityAt(currentObj.StartTime, false) <= 0)
if (loopObj.IsNull() || current.StartTime - loopObj.StartTime > cognition_window_size)
break;
objects.Add(currentObj);
objects.Add(loopObj);
}
return objects;
@ -91,18 +83,18 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
// Returns a list of objects that are visible on screen at
// the point in time at which the current object needs is clicked.
private static List<DifficultyHitObject> retrieveCurrentVisibleObjects(OsuDifficultyHitObject current)
private static List<OsuDifficultyHitObject> retrieveCurrentVisibleObjects(OsuDifficultyHitObject current)
{
List<DifficultyHitObject> objects = new List<DifficultyHitObject>();
List<OsuDifficultyHitObject> objects = new List<OsuDifficultyHitObject>();
for (int i = 0; i < current.Count; i++)
{
OsuDifficultyHitObject currentObj = (OsuDifficultyHitObject)current.Next(i);
OsuDifficultyHitObject loopObj = (OsuDifficultyHitObject)current.Next(i);
if (currentObj.IsNull() || currentObj.OpacityAt(current.StartTime, false) <= 0)
if (loopObj.IsNull() || (loopObj.StartTime - current.StartTime) > cognition_window_size)
break;
objects.Add(currentObj);
objects.Add(loopObj);
}
return objects;