Add osu! mod "Centered Cursor"

[Rudicito]

Mod proposal: #37302

This mod lock the cursor at the middle of the screen, and when we move, it's the whole playfield that moves.

Note

The mod name and description is very neutral, I got no inspiration.

Video

cc3.mp4

How it works

A drawable is added in PlayfieldAdjustmentContainer that gets the screen space mouse position, and block OnMouseMove() propagation to the Playfield.

The screen space mouse position obtained is converted to the local Playfield space position, and we call manually OnMouseMove() with the new mouse position.

Finally, we move the playfield to the new mouse position.

List of broken mods

• Flashlight: the light is not following the cursor well
• Relax: broken, doesn't press the circlesreally often
• Autopilot: ultra broken, the cursor teleports back and forth in a loop
• Bubbles: the bubbles don't spawn in the expected places

The Blinds mod I'm not sure, I think it looks okay, so I didn't add it to the incompatible mods, but maybe I should?

blinds-cc.mp4

Sorry for my bad english

[cowburrs]

looks awesome!

[Rudicito]

Maybe this could have been done in ApplyToDrawableRuleset() but I just done the same thing that OsuModRelax :

https://github.com/ppy/osu/blob/master/osu.Game.Rulesets.Osu%2FMods%2FOsuModRelax.cs#L55-L71