Mercurial > sdl-ios-xcode
view docs/html/sdljoystickgetaxis.html @ 4016:3f93ccc2c01e SDL-1.2
Clear the NOFRAME and RESIZABLE flags in the X11 target before setting their
new values, so multiple calls to SetVideoMode() that toggle these will end
up with the right data.
Fixes Bugzilla #441.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Sun, 08 Jul 2007 01:50:26 +0000 (2007-07-08) |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >SDL_JoystickGetAxis</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="SDL Library Documentation" HREF="index.html"><LINK REL="UP" TITLE="Joystick" HREF="joystick.html"><LINK REL="PREVIOUS" TITLE="SDL_JoystickUpdate" HREF="sdljoystickupdate.html"><LINK REL="NEXT" TITLE="SDL_JoystickGetHat" HREF="sdljoystickgethat.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFF8DC" TEXT="#000000" LINK="#0000ee" VLINK="#551a8b" ALINK="#ff0000" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >SDL Library Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="sdljoystickupdate.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdljoystickgethat.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLJOYSTICKGETAXIS" ></A >SDL_JoystickGetAxis</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN6320" ></A ><H2 >Name</H2 >SDL_JoystickGetAxis -- Get the current state of an axis</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN6323" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN6324" ></A ><P ></P ><PRE CLASS="FUNCSYNOPSISINFO" >#include "SDL.h"</PRE ><P ><CODE ><CODE CLASS="FUNCDEF" >Sint16 <B CLASS="FSFUNC" >SDL_JoystickGetAxis</B ></CODE >(SDL_Joystick *joystick, int axis);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN6330" ></A ><H2 >Description</H2 ><P ><TT CLASS="FUNCTION" >SDL_JoystickGetAxis</TT > returns the current state of the given <TT CLASS="PARAMETER" ><I >axis</I ></TT > on the given <TT CLASS="PARAMETER" ><I >joystick</I ></TT >.</P ><P >On most modern joysticks the X axis is usually represented by <TT CLASS="PARAMETER" ><I >axis</I ></TT > 0 and the Y axis by <TT CLASS="PARAMETER" ><I >axis</I ></TT > 1. The value returned by <TT CLASS="FUNCTION" >SDL_JoystickGetAxis</TT > is a signed integer (-32768 to 32768) representing the current position of the <TT CLASS="PARAMETER" ><I >axis</I ></TT >, 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.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN6341" ></A ><H2 >Return Value</H2 ><P >Returns a 16-bit signed integer representing the current position of the <TT CLASS="PARAMETER" ><I >axis</I ></TT >.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN6345" ></A ><H2 >Examples</H2 ><P ><PRE CLASS="PROGRAMLISTING" >Sint16 x_move, y_move; SDL_Joystick *joy1; . . x_move=SDL_JoystickGetAxis(joy1, 0); y_move=SDL_JoystickGetAxis(joy1, 1);</PRE ></P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN6349" ></A ><H2 >See Also</H2 ><P ><A HREF="sdljoysticknumaxes.html" ><TT CLASS="FUNCTION" >SDL_JoystickNumAxes</TT ></A ></P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sdljoystickupdate.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sdljoystickgethat.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_JoystickUpdate</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="joystick.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL_JoystickGetHat</TD ></TR ></TABLE ></DIV ></BODY ></HTML >