annotate docs/man3/SDL_JoystickGetBall.3 @ 1180:bdcb8bb4c831

From: Tyler Montbriand <tsm@accesscomm.ca> To: sdl@libsdl.org Date: Fri, 30 Sep 2005 02:24:50 -0600 Subject: [SDL] WinCE timers, continued Here's a strange timer for Windows CE that doesn't ignore time across suspends. It uses GetSystemTime to keep the time continuous, and GetTicks to get finer-grained readings than 1 second. It detects the difference between the GetTicks time and GetSystemTime time on power-on to keep the error within one second max. It's not a patch on the current win32 timer code -- took one look at that and figured it had more than enough #ifdefs already. It's windows-ce specific. Another thing I've noticed is that the Windows CE 4.0 and newer API has functions warn processes about suspends. This is something SDL REALLY needs for audio in particular, because turning it off while it's playing causes anything that uses audio to hardlock the system on power-on. Unfortunately I don't have 4.0 to play with. :(
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 22 Nov 2005 07:10:07 +0000
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children 546f7c1eb755
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1 .TH "SDL_JoystickGetBall" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference"
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2 .SH "NAME"
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3 SDL_JoystickGetBall\- Get relative trackball motion
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4 .SH "SYNOPSIS"
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5 .PP
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6 \fB#include "SDL\&.h"
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7 .sp
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8 \fBint \fBSDL_JoystickGetBall\fP\fR(\fBSDL_Joystick *joystick, int ball, int *dx, int *dy\fR);
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9 .SH "DESCRIPTION"
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10 .PP
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11 Get the \fBball\fR axis change\&.
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12 .PP
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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\&.
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14 .SH "RETURN VALUE"
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15 .PP
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16 Returns \fB0\fR on success or \fB-1\fR on failure
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17 .SH "EXAMPLES"
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18 .PP
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19 .PP
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20 .nf
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21 \f(CWint delta_x, delta_y;
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22 SDL_Joystick *joy;
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23 \&.
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24 \&.
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25 \&.
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26 SDL_JoystickUpdate();
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27 if(SDL_JoystickGetBall(joy, 0, &delta_x, &delta_y)==-1)
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28 printf("TrackBall Read Error!
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29 ");
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30 printf("Trackball Delta- X:%d, Y:%d
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31 ", delta_x, delta_y);\fR
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32 .fi
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33 .PP
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34 .SH "SEE ALSO"
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35 .PP
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36 \fI\fBSDL_JoystickNumBalls\fP\fR
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37 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00