blob: 124c910709c5cdf7935c9dd929d04bf622cbb29a [file] [log] [blame]
.TH "SDL_JoystickGetBall" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference"
SDL_JoystickGetBall \- Get relative trackball motion
\fB#include "SDL\&.h"
\fBint \fBSDL_JoystickGetBall\fP\fR(\fBSDL_Joystick *joystick, int ball, int *dx, int *dy\fR);
Get the \fBball\fR axis change\&.
Trackballs can only return relative motion since the last call to \fBSDL_JoystickGetBall\fP, these motion deltas a placed into \fBdx\fR and \fBdy\fR\&.
Returns \fB0\fR on success or \fB-1\fR on failure
\f(CWint delta_x, delta_y;
SDL_Joystick *joy;
if(SDL_JoystickGetBall(joy, 0, &delta_x, &delta_y)==-1)
printf("TrackBall Read Error!
printf("Trackball Delta- X:%d, Y:%d
", delta_x, delta_y);\fR
.\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00