NAME

SDL_GetNumJoystickBalls - Get the number of trackballs on a joystick.

HEADER FILE

Defined in SDL3/SDL_joystick.h

SYNOPSIS

#include "SDL3/SDL.h"

int SDL_GetNumJoystickBalls(SDL_Joystick *joystick);

DESCRIPTION

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

Most joysticks do not have trackballs.

FUNCTION PARAMETERS

joystick

an SDL_Joystick
structure containing joystick information.

RETURN VALUE

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

SDL_GetError () for more information.

AVAILABILITY

This function is available since SDL 3.2.0.

SEE ALSO

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