Mercurial > sdl-ios-xcode
view docs/html/guidetimeexamples.html @ 2702:11eb9ae3c88c
Reverted revision 3416, fixing bug #589
http://bugzilla.libsdl.org/show_bug.cgi?id=589
I was going to add the current window to the OpenGL context info, but that
doesn't fix the case where you set the current context to NULL and then set
the current context to the same window it had before.
This also doesn't take into account changes to the window that might affect
the context, such as viewport changing or fullscreen/windowed mode changing.
Any ideas?
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 26 May 2008 12:43:37 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >Time Examples</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="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 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="guidecdromexamples.html" ACCESSKEY="P" >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" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="GUIDETIMEEXAMPLES" ></A >Time Examples</H1 ><P ></P ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN412" ></A >Time based game loop</H2 ><P ><PRE CLASS="PROGRAMLISTING" >#define TICK_INTERVAL 30 static Uint32 next_time; Uint32 time_left(void) { Uint32 now; now = SDL_GetTicks(); if(next_time <= 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; } </PRE ></P ></DIV ></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="guidecdromexamples.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="reference.html" ACCESSKEY="N" >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" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL Reference</TD ></TR ></TABLE ></DIV ></BODY ></HTML >