Change doubletap doubles nerf in Speed Evaluator to address for galloping

[Givikap120]

Closes #28598
Also added distance factor, because you can't doubletap spaced circles
So this map (mentioned in issue) +HR won't be as nerfed
https://osu.ppy.sh/beatmapsets/1359291#osu/2969884

[Givikap120]

Before:

After:

[bdach]

!diffcalc

[github-actions]

Target: #28611
Spreadsheet: https://docs.google.com/spreadsheets/d/1XRiGIO3zIC-uPnK5HeU4147fZLgQYuLKHDWE27VvI_U/edit

[Givikap120]

Additional comment: abuse is STILL possible if mapper knows what they're doing.
You can add doubles that you can't doubletap or gallop, but you can get 100s on it with doubletapping / galloping
Then map the rest of the map to farm accuracy on
Full fix for this is much harder, so for now I will propose to not rank such maps if mapper blatantly tries to exploit this issue

[Givikap120]

Target: #28611 Spreadsheet: https://docs.google.com/spreadsheets/d/1XRiGIO3zIC-uPnK5HeU4147fZLgQYuLKHDWE27VvI_U/edit

okay, it nerfs fast bursts in general

[Givikap120]

update the sheet pls

[smoogipoo]

!diffcalc

[github-actions]

Target: #28611
Spreadsheet: https://docs.google.com/spreadsheets/d/18iJG17it4o0R852ayfBCAgxKPZG-2QbMCvCvEo4hxJk/edit

[Givikap120]

Okay, I don't see any issues now, I think pp committee can review it

[tsunyoku]

I don't really understand what's going on here

[Givikap120]

2 part curve:

• first is for when you can't get 300 while perfectly doubletapping (hitwindow300 < deltaT < 2 * hitwindow300)
• second is for when can get 300 while perfectly doubletapping
  I can add desmos for clarity

[tsunyoku]

Isn't this going to nerf all maps that have doubles?

[Givikap120]

Isn't this going to nerf all maps that have doubles?

No it's not, check smoogisheet

More mathematic answer:
For example we have OD10. Hitwindow300 = 20ms.
In old version nerf threshold was equal to hitwindow300, so nerf have started on 750bpm 1/4 doubles
In new version nerf threshold moved to hitwindow300 * 2 (40ms for OD10), so nerf now starts on 375bpm 1/4 doubles instead
Based on this you could guess the effect of this

And also, remind that to compensate harsher threshold - compensation was added. So maps with spaced doubles won't be nerfed anymore. Because of this maps like Deconstruction Star was buffed (mentioned map NM buffed by 10pp, EZ by 20pp)