SDL_GetRelativeMouseState - Query SDL's cache for the synchronous mouse button state and accumulated

       This function is available since SDL 3.2.0.

       This function returns the cached synchronous state as SDL understands it from the last pump of the  event
       queue.

       To query the platform for immediate asynchronous state, use SDL_GetGlobalMouseState.

       Passing  non-NULL pointers to x or y will write the destination with respective x or y deltas accumulated
       since the last call to this function (or since event initialization).

       This function is useful for reducing overhead by processing relative mouse inputs  in  one  go  per-frame
       instead  of  individually  per-event,  at the expense of losing the order between events within the frame
       (e.g. quickly pressing and releasing a button within the same frame).

x      a pointer to receive the x mouse delta accumulated since last call, can be NULL if unused.

       y      a pointer to receive the y mouse delta accumulated since last call, can be NULL if unused.

       SDL_GetRelativeMouseState  -  Query  SDL's  cache  for the synchronous mouse button state and accumulated
       mouse delta since last call.

       Returns a 32-bit bitmask of the button state that can be bitwise-compared against the  SDL_BUTTON_MASK(X)
       macro.

SDL_GetMouseState(3), SDL_GetGlobalMouseState(3)

Simple Directmedia Layer                           SDL 3.2.20                       SDL_GetRelativeMouseState(3)

#include<SDL3/SDL_mouse.h>SDL_MouseButtonFlagsSDL_GetRelativeMouseState(float*x,float*y);

       This function should only be called on the main thread.