NAME

       SDL_GetJoystickBall - Get the ball axis change since the last poll.

HEADER FILE

       Defined in SDL3/SDL_joystick.h

SYNOPSIS

       #include "SDL3/SDL.h"

       bool SDL_GetJoystickBall(SDL_Joystick *joystick, int ball, int *dx, int *dy);

DESCRIPTION

       Trackballs can only return relative motion since the last call to

       SDL_GetJoystickBall (), these motion deltas are placed into dx and dy .

       Most joysticks do not have trackballs.

FUNCTION PARAMETERS

       joystick
              the SDL_Joystick
               to query.

       ball   the ball index to query; ball indices start at index 0.

       dx     stores the difference in the x axis position since the last poll.

       dy     stores the difference in the y axis position since the last poll.

RETURN VALUE

       Returns true on success or false on failure; call

       SDL_GetError () for more information.

AVAILABILITY

       This function is available since SDL 3.2.0.

SEE ALSO

       •(3), SDL_GetNumJoystickBalls(3)

Simple Directmedia Layer                            SDL 3.2.8                             SDL_GetJoystickBall(3)