Mercurial > sdl-ios-xcode
annotate docs/html/time.html @ 1948:d646f6e1a439
Starting fresh with the X11 driver
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 26 Jul 2006 04:22:32 +0000 |
parents | 355632dca928 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >Time</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="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 | |
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35 SUMMARY="Header navigation table" |
0 | 36 WIDTH="100%" |
37 BORDER="0" | |
38 CELLPADDING="0" | |
39 CELLSPACING="0" | |
40 ><TR | |
41 ><TH | |
42 COLSPAN="3" | |
43 ALIGN="center" | |
44 >SDL Library Documentation</TH | |
45 ></TR | |
46 ><TR | |
47 ><TD | |
48 WIDTH="10%" | |
49 ALIGN="left" | |
50 VALIGN="bottom" | |
51 ><A | |
52 HREF="sdlcondwaittimeout.html" | |
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53 ACCESSKEY="P" |
0 | 54 >Prev</A |
55 ></TD | |
56 ><TD | |
57 WIDTH="80%" | |
58 ALIGN="center" | |
59 VALIGN="bottom" | |
60 ></TD | |
61 ><TD | |
62 WIDTH="10%" | |
63 ALIGN="right" | |
64 VALIGN="bottom" | |
65 ><A | |
66 HREF="sdlgetticks.html" | |
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67 ACCESSKEY="N" |
0 | 68 >Next</A |
69 ></TD | |
70 ></TR | |
71 ></TABLE | |
72 ><HR | |
73 ALIGN="LEFT" | |
74 WIDTH="100%"></DIV | |
75 ><DIV | |
76 CLASS="CHAPTER" | |
77 ><H1 | |
78 ><A | |
79 NAME="TIME" | |
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80 ></A |
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81 >Chapter 13. Time</H1 |
0 | 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 | |
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93 > -- Get the number of milliseconds since the SDL library initialization.</DT |
0 | 94 ><DT |
95 ><A | |
96 HREF="sdldelay.html" | |
97 >SDL_Delay</A | |
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98 > -- Wait a specified number of milliseconds before returning.</DT |
0 | 99 ><DT |
100 ><A | |
101 HREF="sdladdtimer.html" | |
102 >SDL_AddTimer</A | |
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103 > -- Add a timer which will call a callback after the specified number of milliseconds has |
0 | 104 elapsed.</DT |
105 ><DT | |
106 ><A | |
107 HREF="sdlremovetimer.html" | |
108 >SDL_RemoveTimer</A | |
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109 > -- Remove a timer which was added with |
0 | 110 <A |
111 HREF="sdladdtimer.html" | |
112 >SDL_AddTimer</A | |
113 >.</DT | |
114 ><DT | |
115 ><A | |
116 HREF="sdlsettimer.html" | |
117 >SDL_SetTimer</A | |
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118 > -- Set a callback to run after the specified number of milliseconds has |
0 | 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 | |
138 ></LI | |
139 ></UL | |
140 > </P | |
141 ></DIV | |
142 ><DIV | |
143 CLASS="NAVFOOTER" | |
144 ><HR | |
145 ALIGN="LEFT" | |
146 WIDTH="100%"><TABLE | |
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147 SUMMARY="Footer navigation table" |
0 | 148 WIDTH="100%" |
149 BORDER="0" | |
150 CELLPADDING="0" | |
151 CELLSPACING="0" | |
152 ><TR | |
153 ><TD | |
154 WIDTH="33%" | |
155 ALIGN="left" | |
156 VALIGN="top" | |
157 ><A | |
158 HREF="sdlcondwaittimeout.html" | |
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159 ACCESSKEY="P" |
0 | 160 >Prev</A |
161 ></TD | |
162 ><TD | |
163 WIDTH="34%" | |
164 ALIGN="center" | |
165 VALIGN="top" | |
166 ><A | |
167 HREF="index.html" | |
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168 ACCESSKEY="H" |
0 | 169 >Home</A |
170 ></TD | |
171 ><TD | |
172 WIDTH="33%" | |
173 ALIGN="right" | |
174 VALIGN="top" | |
175 ><A | |
176 HREF="sdlgetticks.html" | |
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177 ACCESSKEY="N" |
0 | 178 >Next</A |
179 ></TD | |
180 ></TR | |
181 ><TR | |
182 ><TD | |
183 WIDTH="33%" | |
184 ALIGN="left" | |
185 VALIGN="top" | |
186 >SDL_CondWaitTimeout</TD | |
187 ><TD | |
188 WIDTH="34%" | |
189 ALIGN="center" | |
190 VALIGN="top" | |
191 ><A | |
192 HREF="reference.html" | |
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193 ACCESSKEY="U" |
0 | 194 >Up</A |
195 ></TD | |
196 ><TD | |
197 WIDTH="33%" | |
198 ALIGN="right" | |
199 VALIGN="top" | |
200 >SDL_GetTicks</TD | |
201 ></TR | |
202 ></TABLE | |
203 ></DIV | |
204 ></BODY | |
205 ></HTML | |
206 > |