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📁 VC5.6.7的一个扩展库。跟DirectX的功能差不多。

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<HTML><HEAD><TITLE>Time Examples</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="SDL Library Documentation"HREF="index.html"><LINKREL="UP"TITLE="Examples"HREF="guideexamples.html"><LINKREL="PREVIOUS"TITLE="CDROM Examples"HREF="guidecdromexamples.html"><LINKREL="NEXT"TITLE="SDL Reference"HREF="reference.html"></HEAD><BODYCLASS="SECT1"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="guidecdromexamples.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Chapter 4. Examples</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="reference.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="GUIDETIMEEXAMPLES"></A>Time Examples</H1><P></P><DIVCLASS="SECT2"><H2CLASS="SECT2"><ANAME="AEN412"></A>Time based game loop</H2><P><PRECLASS="PROGRAMLISTING">#define TICK_INTERVAL    30static Uint32 next_time;Uint32 time_left(void){    Uint32 now;    now = SDL_GetTicks();    if(next_time &#60;= now)        return 0;    else        return next_time - now;}/* main game loop */    next_time = SDL_GetTicks() + TICK_INTERVAL;    while ( game_running ) {        update_game_state();        SDL_Delay(time_left());        next_time += TICK_INTERVAL;    }&#13;</PRE></P></DIV></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="guidecdromexamples.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="reference.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">CDROM Examples</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="guideexamples.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">SDL Reference</TD></TR></TABLE></DIV></BODY></HTML>

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