Mercurial > sdl-ios-xcode
diff docs/man3/SDL_JoystickGetBall.3 @ 0:74212992fb08
Initial revision
author | Sam Lantinga <slouken@lokigames.com> |
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date | Thu, 26 Apr 2001 16:45:43 +0000 |
parents | |
children | 55f1f1b3e27d |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/docs/man3/SDL_JoystickGetBall.3 Thu Apr 26 16:45:43 2001 +0000 @@ -0,0 +1,37 @@ +.TH "SDL_JoystickGetBall" "3" "Mon 12 Mar 2001, 01:03" "SDL" "SDL API Reference" +.SH "NAME" +SDL_JoystickGetBall\- Get relative trackball motion +.SH "SYNOPSIS" +.PP +\fB#include "SDL\&.h" +.sp +\fBint \fBSDL_JoystickGetBall\fP\fR(\fBSDL_Joystick *joystick, int ball, int *dx, int *dy\fR); +.SH "DESCRIPTION" +.PP +Get the \fBball\fR axis change\&. +.PP +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\&. +.SH "RETURN VALUE" +.PP +Returns \fB0\fR on success or \fB-1\fR on failure +.SH "EXAMPLES" +.PP +.PP +.nf +\f(CWint delta_x, delta_y; +SDL_Joystick *joy; +\&. +\&. +\&. +SDL_JoystickUpdate(); +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 +.fi +.PP +.SH "SEE ALSO" +.PP +\fI\fBSDL_JoystickNumBalls\fP\fR +...\" created by instant / docbook-to-man, Mon 12 Mar 2001, 01:03