Add Traceable performance calculation support

osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs

@@ -116,6 +116,11 @@ private double computeAimValue(ScoreInfo score, OsuDifficultyAttributes attribut
                 // We want to give more reward for lower AR when it comes to aim and HD. This nerfs high AR and buffs lower AR.
                 aimValue *= 1.0 + 0.04 * (12.0 - attributes.ApproachRate);
             }
+            else if (score.Mods.Any(h => h is OsuModTraceable))
+            {
+                // The same as HD, placeholder bonus
+                aimValue *= 1.0 + 0.04 * (12.0 - attributes.ApproachRate);
+            }
 
             // We assume 15% of sliders in a map are difficult since there's no way to tell from the performance calculator.
             double estimateDifficultSliders = attributes.SliderCount * 0.15;
@@ -167,6 +172,11 @@ private double computeSpeedValue(ScoreInfo score, OsuDifficultyAttributes attrib
                 // We want to give more reward for lower AR when it comes to aim and HD. This nerfs high AR and buffs lower AR.
                 speedValue *= 1.0 + 0.04 * (12.0 - attributes.ApproachRate);
             }
+            else if (score.Mods.Any(h => h is OsuModTraceable))
+            {
+                // The same as HD, placeholder bonus
+                speedValue *= 1.0 + 0.04 * (12.0 - attributes.ApproachRate);
+            }
 
             // Calculate accuracy assuming the worst case scenario
             double relevantTotalDiff = totalHits - attributes.SpeedNoteCount;
@@ -214,6 +224,8 @@ private double computeAccuracyValue(ScoreInfo score, OsuDifficultyAttributes att
                 accuracyValue *= 1.14;
             else if (score.Mods.Any(m => m is OsuModHidden))
                 accuracyValue *= 1.08;
+            else if (score.Mods.Any(m => m is OsuModTraceable))
+                accuracyValue *= 1.08;
 
             if (score.Mods.Any(m => m is OsuModFlashlight))
                 accuracyValue *= 1.02;