Mania scroll speed depends on "HitPosition"

[smoogipoo]

I suppose this is something that should be investigated to make things consistent between stable and lazer. Not yet sure exactly what this entails, though, since the calculations done are quite different between games.

Discussed in #20818

^{Originally posted by Morilli October 19, 2022}
I was trying to test out the new argon skin in mania and compare it to my normal skin, and I figured out something odd: The scroll speed in lazer always feels too fast, even though I matched the scroll speed setting to the value I'm using in stable.

I figured out the cause for that behavior: The actual scroll speed changes when the HitPosition value in the skin.ini is changed. I guess this is somehow intentional as the scroll speed value is specified in milliseconds, and those milliseconds stay consistent, while obviously with a larger screen space the speed is higher.

I've made a simple test skin + beatmap to show the difference:
test mania ss.osk.zip
none - -.osz.zip

Here's how the skin + beatmap looks like at scroll speed 40 in stable:

And here in lazer:

I feel like this should either be made more obvious or changed so the behavior is consistent with stable, as I and a friend of mine were confused by why the scroll speed felt different.

[ikzune]

don't know if it matters for osumania but betoraja achieves this through a 'Green Number' which represents the amount of frames a note should be visible for and this auto adjusts to accommodate for lane covers which would be the fl and hd mod in osumania