sig
val pointer_pos : Tsdl.Sdl.event -> int * int
val pos : unit -> int * int
val window_pos : Tsdl.Sdl.window -> int * int
val button_pos : Tsdl.Sdl.event -> int * int
val finger_pos : Tsdl.Sdl.event -> float * float
val wheel_y : Tsdl.Sdl.event -> int
val set_wheel_speed : float -> unit
end