Mercurial > sdl-ios-xcode
view docs/html/guidetimeexamples.html @ 134:f1550e1c4916
Fix compile riva fb problem on older kernels
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 01 Aug 2001 03:23:40 +0000 |
parents | 55f1f1b3e27d |
children | e5bc29de3f0a |
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<HTML ><HEAD ><TITLE >Time Examples</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.64 "><LINK REL="HOME" TITLE="SDL Library Documentation" HREF="index.html"><LINK REL="UP" TITLE="Examples" HREF="guideexamples.html"><LINK REL="PREVIOUS" TITLE="CDROM Examples" HREF="guidecdromexamples.html"><LINK REL="NEXT" TITLE="SDL Reference" HREF="reference.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFF8DC" TEXT="#000000" LINK="#0000ee" VLINK="#551a8b" ALINK="#ff0000" ><DIV CLASS="NAVHEADER" ><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="guidecdromexamples.html" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 4. Examples</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="reference.html" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="GUIDETIMEEXAMPLES" >Time Examples</A ></H1 ><P ></P ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN412" >Time based game loop</A ></H2 ><P ><PRE CLASS="PROGRAMLISTING" >#define TICK_INTERVAL 30 Uint32 TimeLeft(void) { static Uint32 next_time = 0; Uint32 now; now = SDL_GetTicks(); if ( next_time <= now ) { next_time = now+TICK_INTERVAL; return(0); } return(next_time-now); } /* main game loop while ( game_running ) { UpdateGameState(); SDL_Delay(TimeLeft()); } </PRE ></P ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="guidecdromexamples.html" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="reference.html" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >CDROM Examples</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="guideexamples.html" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL Reference</TD ></TR ></TABLE ></DIV ></BODY ></HTML >