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| 5131 | clevermous | 1 | |
| 2 | > |
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| 3 | > |
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| 4 | >Time Examples |
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| 5 | > |
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| 6 | NAME="GENERATOR" |
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| 7 | CONTENT="Modular DocBook HTML Stylesheet Version 1.64 |
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| 8 | "> |
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| 9 | REL="HOME" |
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| 10 | TITLE="SDL Library Documentation" |
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| 11 | HREF="index.html"> |
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| 12 | REL="UP" |
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| 13 | TITLE="Examples" |
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| 14 | HREF="guideexamples.html"> |
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| 15 | REL="PREVIOUS" |
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| 16 | TITLE="CDROM Examples" |
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| 17 | HREF="guidecdromexamples.html"> |
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| 18 | REL="NEXT" |
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| 19 | TITLE="SDL Reference" |
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| 20 | HREF="reference.html"> |
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| 21 | > |
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| 22 | CLASS="SECT1" |
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| 23 | BGCOLOR="#FFF8DC" |
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| 24 | TEXT="#000000" |
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| 25 | LINK="#0000ee" |
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| 26 | VLINK="#551a8b" |
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| 27 | ALINK="#ff0000" |
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| 28 | > |
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| 29 | CLASS="NAVHEADER" |
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| 30 | > |
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| 31 | WIDTH="100%" |
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| 32 | BORDER="0" |
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| 33 | CELLPADDING="0" |
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| 34 | CELLSPACING="0" |
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| 35 | > |
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| 36 | > |
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| 37 | COLSPAN="3" |
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| 38 | ALIGN="center" |
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| 39 | >SDL Library Documentation |
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| 40 | > |
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| 41 | > |
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| 42 | > |
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| 43 | WIDTH="10%" |
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| 44 | ALIGN="left" |
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| 45 | VALIGN="bottom" |
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| 46 | > |
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| 47 | HREF="guidecdromexamples.html" |
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| 48 | >Prev |
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| 49 | > |
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| 50 | > |
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| 51 | WIDTH="80%" |
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| 52 | ALIGN="center" |
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| 53 | VALIGN="bottom" |
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| 54 | >Chapter 4. Examples |
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| 55 | > |
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| 56 | WIDTH="10%" |
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| 57 | ALIGN="right" |
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| 58 | VALIGN="bottom" |
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| 59 | > |
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| 60 | HREF="reference.html" |
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| 61 | >Next |
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| 62 | > |
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| 63 | > |
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| 64 | > |
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| 65 | > |
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| 66 | ALIGN="LEFT" |
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| 67 | WIDTH="100%"> |
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| 68 | > |
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| 69 | CLASS="SECT1" |
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| 70 | > |
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| 71 | CLASS="SECT1" |
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| 72 | > |
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| 73 | NAME="GUIDETIMEEXAMPLES" |
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| 74 | >Time Examples |
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| 75 | > |
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| 76 | > |
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| 77 | > |
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| 78 | > |
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| 79 | CLASS="SECT2" |
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| 80 | > |
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| 81 | CLASS="SECT2" |
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| 82 | > |
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| 83 | NAME="AEN412" |
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| 84 | >Time based game loop |
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| 85 | > |
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| 86 | > |
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| 87 | > |
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| 88 | CLASS="PROGRAMLISTING" |
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| 89 | >#define TICK_INTERVAL 30 |
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| 90 | |||
| 91 | Uint32 TimeLeft(void) |
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| 92 | { |
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| 93 | static Uint32 next_time = 0; |
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| 94 | Uint32 now; |
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| 95 | |||
| 96 | now = SDL_GetTicks(); |
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| 97 | if ( next_time <= now ) { |
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| 98 | next_time = now+TICK_INTERVAL; |
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| 99 | return(0); |
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| 100 | } |
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| 101 | return(next_time-now); |
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| 102 | } |
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| 103 | |||
| 104 | |||
| 105 | /* main game loop |
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| 106 | |||
| 107 | while ( game_running ) { |
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| 108 | UpdateGameState(); |
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| 109 | SDL_Delay(TimeLeft()); |
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| 110 | } |
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| 111 | > |
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| 112 | > |
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| 113 | > |
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| 114 | > |
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| 115 | CLASS="NAVFOOTER" |
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| 116 | > |
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| 117 | ALIGN="LEFT" |
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| 118 | WIDTH="100%"> |
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| 119 | WIDTH="100%" |
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| 120 | BORDER="0" |
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| 121 | CELLPADDING="0" |
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| 122 | CELLSPACING="0" |
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| 123 | > |
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| 124 | > |
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| 125 | WIDTH="33%" |
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| 126 | ALIGN="left" |
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| 127 | VALIGN="top" |
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| 128 | > |
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| 129 | HREF="guidecdromexamples.html" |
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| 130 | >Prev |
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| 131 | > |
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| 132 | > |
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| 133 | WIDTH="34%" |
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| 134 | ALIGN="center" |
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| 135 | VALIGN="top" |
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| 136 | > |
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| 137 | HREF="index.html" |
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| 138 | >Home |
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| 139 | > |
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| 140 | > |
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| 141 | WIDTH="33%" |
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| 142 | ALIGN="right" |
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| 143 | VALIGN="top" |
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| 144 | > |
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| 145 | HREF="reference.html" |
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| 146 | >Next |
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| 147 | > |
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| 148 | > |
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| 149 | > |
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| 150 | > |
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| 151 | WIDTH="33%" |
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| 152 | ALIGN="left" |
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| 153 | VALIGN="top" |
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| 154 | >CDROM Examples |
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| 155 | > |
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| 156 | WIDTH="34%" |
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| 157 | ALIGN="center" |
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| 158 | VALIGN="top" |
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| 159 | > |
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| 160 | HREF="guideexamples.html" |
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| 161 | >Up |
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| 162 | > |
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| 163 | > |
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| 164 | WIDTH="33%" |
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| 165 | ALIGN="right" |
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| 166 | VALIGN="top" |
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| 167 | >SDL Reference |
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| 168 | > |
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| 169 | > |
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| 170 | > |
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| 171 | > |
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| 172 | > |
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| 173 | > |