SDL_!JoystickGetBall

SDL_!JoystickGetBall

NAME SYNOPSIS DESCRIPTION RETURN VALUE EXAMPLES SEE ALSO

NAME

SDL_!JoystickGetBall- Get relative trackball motion

SYNOPSIS

#include

int SDL_!JoystickGetBall(SDL_Joystick *joystick, int ball, int *dx, int *dy);

DESCRIPTION

Get the ball axis change.

Trackballs can only return relative motion since the last call to SDL_!JoystickGetBall, these motion deltas a placed into dx and dy.

RETURN VALUE

Returns 0 on success or -1 on failure

EXAMPLES

int delta_x, delta_y; SDL_Joystick *joy; . . . SDL_!JoystickUpdate(); if(SDL_!JoystickGetBall(joy, 0,

SEE ALSO

SDL_!JoystickNumBalls