📄 sdljoystickopen.html

📁 VC5.6.7的一个扩展库。跟DirectX的功能差不多。
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<HTML><HEAD><TITLE>SDL_JoystickOpen</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="SDL Library Documentation"HREF="index.html"><LINKREL="UP"TITLE="Joystick"HREF="joystick.html"><LINKREL="PREVIOUS"TITLE="SDL_JoystickName"HREF="sdljoystickname.html"><LINKREL="NEXT"TITLE="SDL_JoystickOpened"HREF="sdljoystickopened.html"></HEAD><BODYCLASS="REFENTRY"BGCOLOR="#FFF8DC"TEXT="#000000"LINK="#0000ee"VLINK="#551a8b"ALINK="#ff0000"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">SDL Library Documentation</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="sdljoystickname.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="sdljoystickopened.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="SDLJOYSTICKOPEN"></A>SDL_JoystickOpen</H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN6096"></A><H2>Name</H2>SDL_JoystickOpen&nbsp;--&nbsp;Opens a joystick for use.</DIV><DIVCLASS="REFSYNOPSISDIV"><ANAME="AEN6099"></A><H2>Synopsis</H2><DIVCLASS="FUNCSYNOPSIS"><ANAME="AEN6100"></A><P></P><PRECLASS="FUNCSYNOPSISINFO">#include "SDL.h"</PRE><P><CODE><CODECLASS="FUNCDEF">SDL_Joystick *<BCLASS="FSFUNC">SDL_JoystickOpen</B></CODE>(int index);</CODE></P><P></P></DIV></DIV><DIVCLASS="REFSECT1"><ANAME="AEN6106"></A><H2>Description</H2><P>Opens a joystick for use within SDL. The <TTCLASS="PARAMETER"><I>index</I></TT> refers to the N'th joystick in the system. A joystick must be opened before it game be used.</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN6110"></A><H2>Return Value</H2><P>Returns a <SPANCLASS="STRUCTNAME">SDL_Joystick</SPAN> structure on success. <SPANCLASS="RETURNVALUE">NULL</SPAN> on failure.</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN6115"></A><H2>Examples</H2><P><PRECLASS="PROGRAMLISTING">SDL_Joystick *joy;// Check for joystickif(SDL_NumJoysticks()&#62;0){  // Open joystick  joy=SDL_JoystickOpen(0);    if(joy)  {    printf("Opened Joystick 0\n");    printf("Name: %s\n", SDL_JoystickName(0));    printf("Number of Axes: %d\n", SDL_JoystickNumAxes(joy));    printf("Number of Buttons: %d\n", SDL_JoystickNumButtons(joy));    printf("Number of Balls: %d\n", SDL_JoystickNumBalls(joy));  }  else    printf("Couldn't open Joystick 0\n");    // Close if opened  if(SDL_JoystickOpened(0))    SDL_JoystickClose(joy);}</PRE></P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN6119"></A><H2>See Also</H2><P><AHREF="sdljoystickclose.html"><TTCLASS="FUNCTION">SDL_JoystickClose</TT></A></P></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="sdljoystickname.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="index.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="sdljoystickopened.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">SDL_JoystickName</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="joystick.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">SDL_JoystickOpened</TD></TR></TABLE></DIV></BODY></HTML>
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