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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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children 55f1f1b3e27d
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1 <HTML
2 ><HEAD
3 ><TITLE
4 >Time</TITLE
5 ><META
6 NAME="GENERATOR"
7 CONTENT="Modular DocBook HTML Stylesheet Version 1.61
8 "><LINK
9 REL="HOME"
10 TITLE="SDL Library Documentation"
11 HREF="index.html"><LINK
12 REL="UP"
13 TITLE="SDL Reference"
14 HREF="reference.html"><LINK
15 REL="PREVIOUS"
16 TITLE="SDL_CondWaitTimeout"
17 HREF="sdlcondwaittimeout.html"><LINK
18 REL="NEXT"
19 TITLE="SDL_GetTicks"
20 HREF="sdlgetticks.html"><META
21 NAME="KEYWORD"
22 CONTENT="time"><META
23 NAME="KEYWORD"
24 CONTENT="function"></HEAD
25 ><BODY
26 CLASS="CHAPTER"
27 BGCOLOR="#FFF8DC"
28 TEXT="#000000"
29 LINK="#0000ee"
30 VLINK="#551a8b"
31 ALINK="#ff0000"
32 ><DIV
33 CLASS="NAVHEADER"
34 ><TABLE
35 WIDTH="100%"
36 BORDER="0"
37 CELLPADDING="0"
38 CELLSPACING="0"
39 ><TR
40 ><TH
41 COLSPAN="3"
42 ALIGN="center"
43 >SDL Library Documentation</TH
44 ></TR
45 ><TR
46 ><TD
47 WIDTH="10%"
48 ALIGN="left"
49 VALIGN="bottom"
50 ><A
51 HREF="sdlcondwaittimeout.html"
52 >Prev</A
53 ></TD
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55 WIDTH="80%"
56 ALIGN="center"
57 VALIGN="bottom"
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59 ><TD
60 WIDTH="10%"
61 ALIGN="right"
62 VALIGN="bottom"
63 ><A
64 HREF="sdlgetticks.html"
65 >Next</A
66 ></TD
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68 ></TABLE
69 ><HR
70 ALIGN="LEFT"
71 WIDTH="100%"></DIV
72 ><DIV
73 CLASS="CHAPTER"
74 ><H1
75 ><A
76 NAME="TIME"
77 >Chapter 13. Time</A
78 ></H1
79 ><DIV
80 CLASS="TOC"
81 ><DL
82 ><DT
83 ><B
84 >Table of Contents</B
85 ></DT
86 ><DT
87 ><A
88 HREF="sdlgetticks.html"
89 >SDL_GetTicks</A
90 > &#8212; Get the number of milliseconds since the SDL library initialization.</DT
91 ><DT
92 ><A
93 HREF="sdldelay.html"
94 >SDL_Delay</A
95 > &#8212; Wait a specified number of milliseconds before returning.</DT
96 ><DT
97 ><A
98 HREF="sdladdtimer.html"
99 >SDL_AddTimer</A
100 > &#8212; Add a timer which will call a callback after the specified number of milliseconds has
101 elapsed.</DT
102 ><DT
103 ><A
104 HREF="sdlremovetimer.html"
105 >SDL_RemoveTimer</A
106 > &#8212; Remove a timer which was added with
107 <A
108 HREF="sdladdtimer.html"
109 >SDL_AddTimer</A
110 >.</DT
111 ><DT
112 ><A
113 HREF="sdlsettimer.html"
114 >SDL_SetTimer</A
115 > &#8212; Set a callback to run after the specified number of milliseconds has
116 elapsed.</DT
117 ></DL
118 ></DIV
119 ><P
120 >SDL provides several cross-platform functions for dealing with time.
121 It provides a way to get the current time, a way to wait a little while,
122 and a simple timer mechanism. These functions give you two ways of moving an
123 object every x milliseconds:
124
125 <P
126 ></P
127 ><UL
128 ><LI
129 ><P
130 >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
131 ></LI
132 ><LI
133 ><P
134 >Or you can get the number of milliseconds passed, and move the object if, for example, 30 ms passed.</P
135 ></LI
136 ></UL
137 >&#13;</P
138 ></DIV
139 ><DIV
140 CLASS="NAVFOOTER"
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142 ALIGN="LEFT"
143 WIDTH="100%"><TABLE
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149 ><TD
150 WIDTH="33%"
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152 VALIGN="top"
153 ><A
154 HREF="sdlcondwaittimeout.html"
155 >Prev</A
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163 >Home</A
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166 WIDTH="33%"
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171 >Next</A
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175 ><TD
176 WIDTH="33%"
177 ALIGN="left"
178 VALIGN="top"
179 >SDL_CondWaitTimeout</TD
180 ><TD
181 WIDTH="34%"
182 ALIGN="center"
183 VALIGN="top"
184 ><A
185 HREF="reference.html"
186 >Up</A
187 ></TD
188 ><TD
189 WIDTH="33%"
190 ALIGN="right"
191 VALIGN="top"
192 >SDL_GetTicks</TD
193 ></TR
194 ></TABLE
195 ></DIV
196 ></BODY
197 ></HTML
198 >