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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
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+TITLE="Examples"
+HREF="guideexamples.html"><LINK
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+TITLE="CDROM Examples"
+HREF="guidecdromexamples.html"><LINK
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+><BODY
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+VLINK="#551a8b"
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+><DIV
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+SUMMARY="Header navigation table"
+WIDTH="100%"
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+>SDL Library Documentation</TH
+></TR
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+WIDTH="10%"
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+><A
+HREF="guidecdromexamples.html"
+ACCESSKEY="P"
+>Prev</A
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+>Chapter 4. Examples</TD
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+><HR
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+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 &#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
+><DIV
+CLASS="NAVFOOTER"
+><HR
+ALIGN="LEFT"
+WIDTH="100%"><TABLE
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+WIDTH="33%"
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+VALIGN="top"
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+HREF="guidecdromexamples.html"
+ACCESSKEY="P"
+>Prev</A
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+><TD
+WIDTH="34%"
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+>Home</A
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