feat: update mania calc

src/mania/difficulty/gradual.rs

@@ -9,7 +9,7 @@ use crate::{
 
 use super::{
     object::ManiaDifficultyObject, skills::strain::Strain, DifficultyValues,
-    ManiaDifficultyAttributes, ManiaObject, STAR_SCALING_FACTOR,
+    ManiaDifficultyAttributes, ManiaObject, DIFFICULTY_MULTIPLIER,
 };
 
 /// Gradually calculate the difficulty attributes of an osu!mania map.
@@ -136,7 +136,7 @@ impl Iterator for ManiaGradualDifficulty {
         self.idx += 1;
 
         Some(ManiaDifficultyAttributes {
-            stars: self.strain.as_difficulty_value() * STAR_SCALING_FACTOR,
+            stars: self.strain.as_difficulty_value() * DIFFICULTY_MULTIPLIER,
             hit_window: self.hit_window,
             max_combo: self.curr_combo,
             n_objects: self.idx as u32,

src/mania/difficulty/mod.rs

@@ -14,7 +14,7 @@ pub mod gradual;
 mod object;
 mod skills;
 
-const STAR_SCALING_FACTOR: f64 = 0.018;
+const DIFFICULTY_MULTIPLIER: f64 = 0.018;
 
 pub fn difficulty(
     difficulty: &Difficulty,
@@ -31,7 +31,7 @@ pub fn difficulty(
         .od;
 
     ManiaDifficultyAttributes {
-        stars: values.strain.difficulty_value() * STAR_SCALING_FACTOR,
+        stars: values.strain.difficulty_value() * DIFFICULTY_MULTIPLIER,
         hit_window,
         max_combo: values.max_combo,
         n_objects,

src/mania/difficulty/skills/strain.rs

@@ -9,7 +9,7 @@ use crate::{
 
 const INDIVIDUAL_DECAY_BASE: f64 = 0.125;
 const OVERALL_DECAY_BASE: f64 = 0.3;
-const RELEASE_THRESHOLD: f64 = 24.0;
+const RELEASE_THRESHOLD: f64 = 30.0;
 
 const SKILL_MULTIPLIER: f64 = 1.0;
 const STRAIN_DECAY_BASE: f64 = 1.0;
@@ -87,11 +87,12 @@ impl Strain {
 
         for i in 0..self.end_times.len() {
             // * The current note is overlapped if a previous note or end is overlapping the current note body
-            is_overlapping |=
-                self.end_times[i] > start_time + 1.0 && end_time > self.end_times[i] + 1.0;
+            is_overlapping |= self.end_times[i] > start_time + 1.0
+                && end_time > self.end_times[i] + 1.0
+                && start_time > self.start_times[i] + 1.0;
 
             // * We give a slight bonus to everything if something is held meanwhile
-            if self.end_times[i] > end_time + 1.0 {
+            if self.end_times[i] > end_time + 1.0 && start_time > self.start_times[i] + 1.0 {
                 hold_factor = 1.25;
             }
 
@@ -109,7 +110,7 @@ impl Strain {
         // * 0.0 +--------+-+---------------> Release Difference / ms
         // *         release_threshold
         if is_overlapping {
-            hold_addition = (1.0 + (0.5 * (RELEASE_THRESHOLD - closest_end_time)).exp()).recip();
+            hold_addition = (1.0 + (0.27 * (RELEASE_THRESHOLD - closest_end_time)).exp()).recip();
         }
 
         // * Decay and increase individualStrains in own column

src/mania/performance/mod.rs

@@ -863,9 +863,7 @@ struct ManiaPerformanceInner<'mods> {
 
 impl ManiaPerformanceInner<'_> {
     fn calculate(self) -> ManiaPerformanceAttributes {
-        // * Arbitrary initial value for scaling pp in order to standardize distributions across game modes.
-        // * The specific number has no intrinsic meaning and can be adjusted as needed.
-        let mut multiplier = 8.0;
+        let mut multiplier = 1.0;
 
         if self.mods.nf() {
             multiplier *= 0.75;
@@ -887,7 +885,7 @@ impl ManiaPerformanceInner<'_> {
 
     fn compute_difficulty_value(&self) -> f64 {
         // * Star rating to pp curve
-        (self.attrs.stars - 0.15).max(0.05).powf(2.2)
+        8.0 * (self.attrs.stars - 0.15).max(0.05).powf(2.2)
              // * From 80% accuracy, 1/20th of total pp is awarded per additional 1% accuracy
              * (5.0 * self.calculate_custom_accuracy() - 4.0).max(0.0)
              // * Length bonus, capped at 1500 notes