sdl_joysticknumballs(3) - Linux man page
Name
SDL_JoystickNumBalls - Get the number of joystick trackballsSynopsis
#include "SDL.h"
int SDL_JoystickNumBalls(SDL_Joystick *joystick);
Description
Return the number of trackballs available from a previously opened SDL_Joystick.
Return Value
Number of trackballs.
See Also
SDL_JoystickGetBall, SDL_JoystickOpen