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Commit Graph

244 Commits

Author SHA1 Message Date
Bartłomiej Dach
7c9adc7ad3
Fix incorrect score conversion on selected beatmaps due to incorrect difficultyPeppyStars rounding
Fixes issue that occurs on *about* 246 beatmaps and was first described
by me on discord:

    https://discord.com/channels/188630481301012481/188630652340404224/1154367700378865715

and then rediscovered again during work on
https://github.com/ppy/osu/pull/26405:

    https://gist.github.com/bdach/414d5289f65b0399fa8f9732245a4f7c#venenog-on-ultmate-end-by-blacky-overdose-631

It so happens that in stable, due to .NET Framework internals, float
math would be performed using x87 registers and opcodes.
.NET (Core) however uses SSE instructions on 32- and 64-bit words.
x87 registers are _80 bits_ wide. Which is notably wider than _both_
float and double. Therefore, on a significant number of beatmaps,
the rounding would not produce correct values due to insufficient
precision.

See following gist for corroboration of the above:

    https://gist.github.com/bdach/dcde58d5a3607b0408faa3aa2b67bf10

Thus, to crudely - but, seemingly accurately, after checking across
all ranked maps - emulate this, use `decimal`, which is slow, but has
bigger precision than `double`. The single known exception beatmap
in whose case this results in an incorrect result is

    https://osu.ppy.sh/beatmapsets/1156087#osu/2625853

which is considered an "acceptable casualty" of sorts.

Doing this requires some fooling of the compiler / runtime (see second
inline comment in new method). To corroborate that this is required,
you can try the following code snippet:

    Console.WriteLine(string.Join(' ', BitConverter.GetBytes(1.3f).Select(x => x.ToString("X2"))));
    Console.WriteLine(string.Join(' ', BitConverter.GetBytes(1.3).Select(x => x.ToString("X2"))));
    Console.WriteLine();

    decimal d1 = (decimal)1.3f;
    decimal d2 = (decimal)1.3;
    decimal d3 = (decimal)(double)1.3f;

    Console.WriteLine(string.Join(' ', decimal.GetBits(d1).SelectMany(BitConverter.GetBytes).Select(x => x.ToString("X2"))));
    Console.WriteLine(string.Join(' ', decimal.GetBits(d2).SelectMany(BitConverter.GetBytes).Select(x => x.ToString("X2"))));
    Console.WriteLine(string.Join(' ', decimal.GetBits(d3).SelectMany(BitConverter.GetBytes).Select(x => x.ToString("X2"))));

which will print

    66 66 A6 3F
    CD CC CC CC CC CC F4 3F

    0D 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00
    0D 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00
    8C 5D 89 FB 3B 76 00 00 00 00 00 00 00 00 0E 00

Note that despite `d1` being converted from a less-precise floating-
-point value than `d2`, it still is represented 100% accurately as
a decimal number.

After applying this change, recomputation of legacy scoring attributes
for *all* rulesets will be required.
2024-01-10 19:30:18 +01:00
Dan Balasescu
6b4b2a57fc
Expose only as one method 2023-12-21 14:58:23 +09:00
Dan Balasescu
4e3b994142
Relocate HitResult numeric score to ScoreProcessor 2023-12-21 14:52:31 +09:00
Dan Balasescu
30116512ca
Populate MaxCombo scoring attrib for non-osu rulesets 2023-12-18 12:01:51 +09:00
Zyf
71e5654b64 Account for legacyAccScore in score conversion 2023-11-24 23:07:27 +01:00
Dan Balasescu
da2a4681d9 Add method to retrieve legacy score multiplier 2023-10-02 16:52:01 +09:00
Dan Balasescu
19a442a32a Fix incorrect change in taiko score simulator 2023-09-26 17:46:03 +09:00
Dan Balasescu
628517569b Fix another difficulty-specific value 2023-09-08 21:08:09 +09:00
Dan Balasescu
2334be1987 Split legacy scoring attributes into a separate object 2023-09-07 21:10:38 +09:00
Dean Herbert
9ff6b3fcd3 Merge branch 'master' into editor-save-local-score-management 2023-07-06 12:28:44 +09:00
Dean Herbert
1629024111 ILegacyScoreProcessor -> ILegacyScoreSimulator 2023-07-04 17:32:54 +09:00
Dean Herbert
d74b1e148d Make ScoreInfo.BeatmapInfo nullable 2023-07-04 14:50:34 +09:00
Dan Balasescu
09bc8e45de Refactoring 2023-06-28 16:14:32 +09:00
Dan Balasescu
5f350aa66f Fix float division
Firstly, this is intended to be a float division.

Secondly, dividing integers by 0 results in an exception, but dividing
non-zero floats by 0 results in +/- infinity which will be clamped to
the upper range.
In particular, this occurs when the beatmap has 1 hitobject (0 drain
length).
2023-06-27 17:14:35 +09:00
Dan Balasescu
a9c65d200a Initial conversion of scores 2023-06-26 22:19:01 +09:00
Dan Balasescu
e1d723a2cc Merge branch 'master' into diffcalc-total-scorev1 2023-06-26 14:32:14 +09:00
Dan Balasescu
06565871d6 Add flag to disable computing legacy scoring values 2023-06-24 01:03:18 +09:00
Dean Herbert
0ab0c52ad5 Automated pass 2023-06-24 01:00:03 +09:00
Dan Balasescu
87447f41d0 Fix incorrect calculation of difficulty 2023-06-24 00:58:45 +09:00
Dan Balasescu
bfa449e47a Adjust attribute data 2023-06-19 21:38:13 +09:00
Dan Balasescu
aa644832dc Add ScoreV1 calculation for TaikoRuleset 2023-06-13 19:28:46 +09:00
Dan Balasescu
e402c6d2b4 Write max combo attribute from base class 2023-06-02 21:53:25 +09:00
Terochi
eff6c7be64 Removed unnecessary methods, changed tests, and moved LimitedCapacityQueue.cs to a more generic namespace. 2022-11-19 16:53:35 +01:00
Dan Balasescu
819027d61c Rename to isConvert 2022-11-04 16:17:49 +09:00
Dan Balasescu
5448c0209e Rename var 2022-11-02 10:14:40 +09:00
Dan Balasescu
4342521bc1 Merge branch 'master' into stamina-available-fingers 2022-10-28 13:07:48 +09:00
Dan Balasescu
707b9eaa50 Remove unnecessary null-forgiving 2022-10-28 13:07:44 +09:00
vun
122064d03f Minor refactoring to reduce amount of looping 2022-10-09 07:09:05 +08:00
Dan Balasescu
234c6ac799 Pin taiko PP calculator accuracy to osu-stable values 2022-10-05 20:21:15 +09:00
vun
47781a8f94 Fix code inspect issues and SR test cases 2022-10-03 17:31:45 +08:00
vun
25976e1f10 Correct xmldocs 2022-10-03 14:20:01 +08:00
vun
c933b62df6 Correct xmldoc 2022-10-03 14:16:53 +08:00
Jay L
6752655b5a xml, remove speedbonus cap 2022-10-02 16:08:14 +10:00
Jay L
4b562f782f decrease finger count 2022-10-02 15:28:39 +10:00
Jay L
a276e40033 reintroduce fl bonus to converts 2022-10-02 09:05:58 +10:00
vun
e6093f94df Apply nerfs to HD/FL bonuses with converts 2022-09-30 20:56:16 +08:00
vun
02092ede64 Refactor previous and next colour change into TaikoDifficultyHitObjectColour 2022-09-30 11:42:48 +08:00
vun
09a38fec94 Implement mono tl nerf for stamina, disable convert specific nerfs 2022-09-30 09:10:56 +08:00
vun
d84c956af9 Refactor to move first-object detection to evaluation 2022-09-29 15:27:26 +08:00
Dan Balasescu
9645bfe708 Bump difficulty calculator versions 2022-09-02 16:27:25 +09:00
Dan Balasescu
85705d97a5
Merge pull request #19853 from Lawtrohux/pp-rescale-effective-misses
osu!taiko performance point adjustments & effective misses
2022-08-25 14:43:03 +09:00
Dan Balasescu
8eab36f8c9 Actually fix possible NaN value 2022-08-25 14:02:10 +09:00
vun
fb9bb2d42d Declare Parent as non-nullable 2022-08-24 08:57:13 +08:00
Jay L
3acbcac4d1 fix NaN PP on 0 object count 2022-08-22 19:45:51 +10:00
Jay L
c1da509119 round numerical value
this is painfully annoying me
2022-08-19 23:23:40 +10:00
Jay L
faf143b11a fix comment 2022-08-19 23:15:38 +10:00
Jay L
b30fba1430 emc attribute 2022-08-19 22:57:40 +10:00
Jay L
fea31cc895 introduce effective misscount, accuracy rescale 2022-08-19 22:57:28 +10:00
vun
f3e1287f04 Remove redundant using statement 2022-08-19 16:19:45 +08:00
vun
684efefb50 Add FirstHitObject as a property of encoding classes 2022-08-19 16:13:36 +08:00