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SDL_GetJoystickBall(3) SDL3 FUNCTIONS SDL_GetJoystickBall(3)

NAME

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

SYNOPSIS

#include <SDL3/SDL_joystick.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

the SDL_Joystick to query.
the ball index to query; ball indices start at index 0.
stores the difference in the x axis position since the last poll.
stores the difference in the y axis position since the last poll.

RETURN VALUE

for more information.

AVAILABILITY

This function is available since SDL 3.2.0.

SEE ALSO

SDL_GetNumJoystickBalls(3)

SDL 3.2.16 Simple Directmedia Layer