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annotate docs/man3/SDL_JoystickGetAxis.3 @ 3957:b1d5b56aa549 SDL-1.2

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Date: Mon, 4 Jun 2007 06:17:59 +0000 (UTC) From: George Gensure <werkt0@gmail.com> Subject: [SDL] error removal patch for SDL_x11dyn.c I found that calling SDL_GetError when an error hasn't necessarily occurred is still reporting problems from loadso regarding dynamic functions in X11. I've added the following to my local copy to avoid revealing the 'many library lookup' approach adopted by x11dyn.c:
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 13 Jun 2007 07:54:10 +0000
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1 .TH "SDL_JoystickGetAxis" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference"
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2 .SH "NAME"
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3 SDL_JoystickGetAxis\- Get the current state of an axis
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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 \fBSint16 \fBSDL_JoystickGetAxis\fP\fR(\fBSDL_Joystick *joystick, int axis\fR);
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9 .SH "DESCRIPTION"
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10 .PP
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11 \fBSDL_JoystickGetAxis\fP returns the current state of the given \fBaxis\fR on the given \fBjoystick\fR\&.
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12 .PP
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13 On most modern joysticks the X axis is usually represented by \fBaxis\fR 0 and the Y axis by \fBaxis\fR 1\&. The value returned by \fBSDL_JoystickGetAxis\fP is a signed integer (-32768 to 32768) representing the current position of the \fBaxis\fR, it maybe necessary to impose certain tolerances on these values to account for jitter\&. It is worth noting that some joysticks use axes 2 and 3 for extra buttons\&.
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14 .SH "RETURN VALUE"
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15 .PP
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16 Returns a 16-bit signed integer representing the current position of the \fBaxis\fR\&.
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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(CWSint16 x_move, y_move;
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22 SDL_Joystick *joy1;
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23 \&.
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24 \&.
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25 x_move=SDL_JoystickGetAxis(joy1, 0);
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26 y_move=SDL_JoystickGetAxis(joy1, 1);\fR
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27 .fi
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28 .PP
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29 .SH "SEE ALSO"
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30 .PP
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31 \fI\fBSDL_JoystickNumAxes\fP\fR
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32 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00