Mercurial > sdl-ios-xcode
annotate docs/html/guidetimeexamples.html @ 3092:cad1aefa2ed9
Date: Thu, 12 Mar 2009 15:14:38 +0200
From: "Mike Gorchak"
Subject: New QNX patches
In photon.tar.gz there are new files to be placed into ./src/video/photon/
directory.
qnx3.diff - new patches for QNX support. Since I've found a lot of bugs in
the new GF QNX Graphics Framework and I'm suspended development for GF
driver until already found bugs will be fixed and switched to Photon driver
implementation.
sdl.diff - I've found that renderer creation result has not been checked and
SDL shows error like: "there is no current renderer", now SDL will show
correct error which was set be renderer.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 17 Mar 2009 03:24:22 +0000 |
| parents | 355632dca928 |
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| rev | line source |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Time Examples</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="Examples" | |
| 14 HREF="guideexamples.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="CDROM Examples" | |
| 17 HREF="guidecdromexamples.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL Reference" | |
| 20 HREF="reference.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="SECT1" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
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31 SUMMARY="Header navigation table" |
| 0 | 32 WIDTH="100%" |
| 33 BORDER="0" | |
| 34 CELLPADDING="0" | |
| 35 CELLSPACING="0" | |
| 36 ><TR | |
| 37 ><TH | |
| 38 COLSPAN="3" | |
| 39 ALIGN="center" | |
| 40 >SDL Library Documentation</TH | |
| 41 ></TR | |
| 42 ><TR | |
| 43 ><TD | |
| 44 WIDTH="10%" | |
| 45 ALIGN="left" | |
| 46 VALIGN="bottom" | |
| 47 ><A | |
| 48 HREF="guidecdromexamples.html" | |
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49 ACCESSKEY="P" |
| 0 | 50 >Prev</A |
| 51 ></TD | |
| 52 ><TD | |
| 53 WIDTH="80%" | |
| 54 ALIGN="center" | |
| 55 VALIGN="bottom" | |
| 56 >Chapter 4. Examples</TD | |
| 57 ><TD | |
| 58 WIDTH="10%" | |
| 59 ALIGN="right" | |
| 60 VALIGN="bottom" | |
| 61 ><A | |
| 62 HREF="reference.html" | |
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63 ACCESSKEY="N" |
| 0 | 64 >Next</A |
| 65 ></TD | |
| 66 ></TR | |
| 67 ></TABLE | |
| 68 ><HR | |
| 69 ALIGN="LEFT" | |
| 70 WIDTH="100%"></DIV | |
| 71 ><DIV | |
| 72 CLASS="SECT1" | |
| 73 ><H1 | |
| 74 CLASS="SECT1" | |
| 75 ><A | |
| 76 NAME="GUIDETIMEEXAMPLES" | |
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77 ></A |
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78 >Time Examples</H1 |
| 0 | 79 ><P |
| 80 ></P | |
| 81 ><DIV | |
| 82 CLASS="SECT2" | |
| 83 ><H2 | |
| 84 CLASS="SECT2" | |
| 85 ><A | |
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86 NAME="AEN412" |
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87 ></A |
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88 >Time based game loop</H2 |
| 0 | 89 ><P |
| 90 ><PRE | |
| 91 CLASS="PROGRAMLISTING" | |
| 92 >#define TICK_INTERVAL 30 | |
| 93 | |
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94 static Uint32 next_time; |
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95 |
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96 Uint32 time_left(void) |
| 0 | 97 { |
| 98 Uint32 now; | |
| 99 | |
| 100 now = SDL_GetTicks(); | |
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101 if(next_time <= now) |
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102 return 0; |
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103 else |
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104 return next_time - now; |
| 0 | 105 } |
| 106 | |
| 107 | |
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108 /* main game loop */ |
| 0 | 109 |
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110 next_time = SDL_GetTicks() + TICK_INTERVAL; |
| 0 | 111 while ( game_running ) { |
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112 update_game_state(); |
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113 SDL_Delay(time_left()); |
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114 next_time += TICK_INTERVAL; |
| 0 | 115 } </PRE |
| 116 ></P | |
| 117 ></DIV | |
| 118 ></DIV | |
| 119 ><DIV | |
| 120 CLASS="NAVFOOTER" | |
| 121 ><HR | |
| 122 ALIGN="LEFT" | |
| 123 WIDTH="100%"><TABLE | |
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124 SUMMARY="Footer navigation table" |
| 0 | 125 WIDTH="100%" |
| 126 BORDER="0" | |
| 127 CELLPADDING="0" | |
| 128 CELLSPACING="0" | |
| 129 ><TR | |
| 130 ><TD | |
| 131 WIDTH="33%" | |
| 132 ALIGN="left" | |
| 133 VALIGN="top" | |
| 134 ><A | |
| 135 HREF="guidecdromexamples.html" | |
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136 ACCESSKEY="P" |
| 0 | 137 >Prev</A |
| 138 ></TD | |
| 139 ><TD | |
| 140 WIDTH="34%" | |
| 141 ALIGN="center" | |
| 142 VALIGN="top" | |
| 143 ><A | |
| 144 HREF="index.html" | |
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145 ACCESSKEY="H" |
| 0 | 146 >Home</A |
| 147 ></TD | |
| 148 ><TD | |
| 149 WIDTH="33%" | |
| 150 ALIGN="right" | |
| 151 VALIGN="top" | |
| 152 ><A | |
| 153 HREF="reference.html" | |
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154 ACCESSKEY="N" |
| 0 | 155 >Next</A |
| 156 ></TD | |
| 157 ></TR | |
| 158 ><TR | |
| 159 ><TD | |
| 160 WIDTH="33%" | |
| 161 ALIGN="left" | |
| 162 VALIGN="top" | |
| 163 >CDROM Examples</TD | |
| 164 ><TD | |
| 165 WIDTH="34%" | |
| 166 ALIGN="center" | |
| 167 VALIGN="top" | |
| 168 ><A | |
| 169 HREF="guideexamples.html" | |
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170 ACCESSKEY="U" |
| 0 | 171 >Up</A |
| 172 ></TD | |
| 173 ><TD | |
| 174 WIDTH="33%" | |
| 175 ALIGN="right" | |
| 176 VALIGN="top" | |
| 177 >SDL Reference</TD | |
| 178 ></TR | |
| 179 ></TABLE | |
| 180 ></DIV | |
| 181 ></BODY | |
| 182 ></HTML | |
| 183 > |