mirror of https://github.com/ppy/osu
6266af8a56
Reported in https://discord.com/channels/188630481301012481/1097318920991559880/1221836384038551613. Example score: https://osu.ppy.sh/scores/1855965185 The cause of the overestimation was an error in taiko's score simulator. In lazer taiko, swell ticks don't give any score anymore, while they did in stable. For all intents and purposes, swell ticks can be considered "bonus" objects that "don't give any actual bonus score". Which is to say, during simulation of a legacy score swell ticks hit should be treated as bonus, because if they aren't, then otherwise they will be treated essentially as *normal hits*, meaning that they will be included in the *accuracy* portion of score, which breaks all sorts of follow-up assumptions: - The accuracy portion of the best possible total score becomes overinflated in comparison to reality, while the combo portion of that maximum score becomes underestimated. - Because the affected score has low accuracy, the estimated accuracy portion of the score (as given by maximmum accuracy portion of score times the actual numerical accuracy of the score) is also low. - However, the next step is estimating the combo portion, which is done by taking legacy total score, subtracting the aforementioned estimation for accuracy total score from that, and then dividing the result by the maximum achievable combo score on the map. Because most of actual "combo" score from swell ticks was "moved" into the accuracy portion due to the aforementioned error, the maximum achievable combo score becomes so small that the estimated combo portion exceeds 1. Instead, this change makes it so that gains from swell ticks are treated as "bonus", which means that they are excluded from the accuracy portion of score and instead count into the bonus portion of score, bringing the scores concerned more in line with expectations - although due to pessimistic assumptions in the simulation of the swell itself, the conversion will still overestimate total score for affected scores, just not by *that* much. |
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| .. | ||
| Evaluators | ||
| Preprocessing | ||
| Skills | ||
| TaikoDifficultyAttributes.cs | ||
| TaikoDifficultyCalculator.cs | ||
| TaikoLegacyScoreSimulator.cs | ||
| TaikoPerformanceAttributes.cs | ||
| TaikoPerformanceCalculator.cs | ||