SDL_GetNumJoystickBalls - Get the number of trackballs on a joystick.

       This function is available since SDL 3.2.0.

       Joystick  trackballs  have  only  relative  motion  events associated with them and their state cannot be
       polled.

       Most joysticks do not have trackballs.

joystick
              an SDL_Joystick
               structure containing joystick information.

       Defined in SDL3/SDL_joystick.h

       SDL_GetNumJoystickBalls - Get the number of trackballs on a joystick.

       Returns the number of trackballs on success or -1 on failure; call

       SDL_GetError () for more information.

•(3), SDL_GetJoystickBall(3), •(3), SDL_GetNumJoystickAxes(3), •(3), SDL_GetNumJoystickButtons(3),  •(3),
       SDL_GetNumJoystickHats(3)

Simple Directmedia Layer                           SDL 3.2.10                         SDL_GetNumJoystickBalls(3)

#include"SDL3/SDL.h"intSDL_GetNumJoystickBalls(SDL_Joystick*joystick);