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| 79 | NAME="TIME" |
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| 81 | >Chapter 13. Time</H1 |
| 82 | ><DIV |
| 83 | CLASS="TOC" |
| 84 | ><DL |
| 85 | ><DT |
| 86 | ><B |
| 87 | >Table of Contents</B |
| 88 | ></DT |
| 89 | ><DT |
| 90 | ><A |
| 91 | HREF="sdlgetticks.html" |
| 92 | >SDL_GetTicks</A |
| 93 | > -- Get the number of milliseconds since the SDL library initialization.</DT |
| 94 | ><DT |
| 95 | ><A |
| 96 | HREF="sdldelay.html" |
| 97 | >SDL_Delay</A |
| 98 | > -- Wait a specified number of milliseconds before returning.</DT |
| 99 | ><DT |
| 100 | ><A |
| 101 | HREF="sdladdtimer.html" |
| 102 | >SDL_AddTimer</A |
| 103 | > -- Add a timer which will call a callback after the specified number of milliseconds has |
| 104 | elapsed.</DT |
| 105 | ><DT |
| 106 | ><A |
| 107 | HREF="sdlremovetimer.html" |
| 108 | >SDL_RemoveTimer</A |
| 109 | > -- Remove a timer which was added with |
| 110 | <A |
| 111 | HREF="sdladdtimer.html" |
| 112 | >SDL_AddTimer</A |
| 113 | >.</DT |
| 114 | ><DT |
| 115 | ><A |
| 116 | HREF="sdlsettimer.html" |
| 117 | >SDL_SetTimer</A |
| 118 | > -- Set a callback to run after the specified number of milliseconds has |
| 119 | elapsed.</DT |
| 120 | ></DL |
| 121 | ></DIV |
| 122 | ><P |
| 123 | >SDL provides several cross-platform functions for dealing with time. |
| 124 | It provides a way to get the current time, a way to wait a little while, |
| 125 | and a simple timer mechanism. These functions give you two ways of moving an |
| 126 | object every x milliseconds: |
| 127 | |
| 128 | <P |
| 129 | ></P |
| 130 | ><UL |
| 131 | ><LI |
| 132 | ><P |
| 133 | >Use a timer callback function. This may have the bad effect that it runs in a seperate thread or uses alarm signals, but it's easier to implement.</P |
| 134 | ></LI |
| 135 | ><LI |
| 136 | ><P |
| 137 | >Or you can get the number of milliseconds passed, and move the object if, for example, 30 ms passed.</P |
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