]> git.xonotic.org Git - xonotic/xonotic.git/blob - misc/builddeps/win64/sdl/share/man/man3/SDL_JoystickGetBall.3
Move libraries into subdirectories for better selectivity when building.
[xonotic/xonotic.git] / misc / builddeps / win64 / sdl / share / man / man3 / SDL_JoystickGetBall.3
1 .TH "SDL_JoystickGetBall" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference" 
2 .SH "NAME"
3 SDL_JoystickGetBall \- Get relative trackball motion
4 .SH "SYNOPSIS"
5 .PP
6 \fB#include "SDL\&.h"
7 .sp
8 \fBint \fBSDL_JoystickGetBall\fP\fR(\fBSDL_Joystick *joystick, int ball, int *dx, int *dy\fR);
9 .SH "DESCRIPTION"
10 .PP
11 Get the \fBball\fR axis change\&.
12 .PP
13 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\&.
14 .SH "RETURN VALUE"
15 .PP
16 Returns \fB0\fR on success or \fB-1\fR on failure
17 .SH "EXAMPLES"
18 .PP
19 .PP
20 .nf
21 \f(CWint delta_x, delta_y;
22 SDL_Joystick *joy;
23 \&.
24 \&.
25 \&.
26 SDL_JoystickUpdate();
27 if(SDL_JoystickGetBall(joy, 0, &delta_x, &delta_y)==-1)
28   printf("TrackBall Read Error!
29 ");
30 printf("Trackball Delta- X:%d, Y:%d
31 ", delta_x, delta_y);\fR
32 .fi
33 .PP
34 .SH "SEE ALSO"
35 .PP
36 \fI\fBSDL_JoystickNumBalls\fP\fR
37 .\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00