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time.html
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time.html
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<HTML
><HEAD
><TITLE
>Time</TITLE
><META
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CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
"><LINK
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HREF="reference.html"><LINK
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TITLE="SDL_CondWaitTimeout"
HREF="sdlcondwaittimeout.html"><LINK
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HREF="sdlgetticks.html"><META
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CONTENT="time"><META
NAME="KEYWORD"
CONTENT="function"></HEAD
><BODY
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>Chapter 13. Time</H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
HREF="sdlgetticks.html"
>SDL_GetTicks</A
> -- Get the number of milliseconds since the SDL library initialization.</DT
><DT
><A
HREF="sdldelay.html"
>SDL_Delay</A
> -- Wait a specified number of milliseconds before returning.</DT
><DT
><A
HREF="sdladdtimer.html"
>SDL_AddTimer</A
> -- Add a timer which will call a callback after the specified number of milliseconds has
elapsed.</DT
><DT
><A
HREF="sdlremovetimer.html"
>SDL_RemoveTimer</A
> -- Remove a timer which was added with
<A
HREF="sdladdtimer.html"
>SDL_AddTimer</A
>.</DT
><DT
><A
HREF="sdlsettimer.html"
>SDL_SetTimer</A
> -- Set a callback to run after the specified number of milliseconds has
elapsed.</DT
></DL
></DIV
><P
>SDL provides several cross-platform functions for dealing with time.
It provides a way to get the current time, a way to wait a little while,
and a simple timer mechanism. These functions give you two ways of moving an
object every x milliseconds:
<P
></P
><UL
><LI
><P
>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
></LI
><LI
><P
>Or you can get the number of milliseconds passed, and move the object if, for example, 30 ms passed.</P
></LI
></UL
> </P
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