Implement acceleration profile for two finger scrolling on a touchpad
Currently, on a touchpad, scrolling distances are calculated differently to cursor movement. I think most people prefer them to be the same to avoid having two "muscle memory" models.
Implement acceleration for two finger scrolling on a touchpad.
I mean, if moving a finger X inches at speed V on a touchpad will move the cursor D pixels on the screen, doing a two finger scroll of the same X inches at speed V should result in the same D pixels being scrolled.
Two finger scrolling can (or should) be accelerated like what we does for cursor movements. The faster the finger movements, the larger distances should be scrolled.
Implementation in Other Systems
I think macOS does what described above.