Mercurial > sdl-ios-xcode
annotate docs/html/sdljoyballevent.html @ 1157:baf35853ad54
Date: Mon, 10 Oct 2005 13:09:32 +0300
From: Tommi Kyntola <tommi.kyntola@ray.fi>
To: sdl@libsdl.org
Subject: [SDL] [RFC] get_ticks broken on linux
It uses gettimeofday to calculate the timedifference.
Gettimeofday returns current time which is seldom monotonous.
This breaks SDL timer subsystem. (time callbacks and all that
get borked when the time difference ms is suddenly ~ 2^32)
I posted a message about this earlier but got no response.
Some thoughts on this matter would be appreciated.
(Or even an explanation for the lack of interest.)
A patch below would use the posix timers that have been around
since posix 93 and do provide a good source of monotonous time
on linux boxes (and on few others too).
The following patch is also availabe at:
http://www.hut.fi/u/tkyntola/SDL-1.2.9-clockfix.patch
It's against 1.2.9, but I can easily rediffit against
the cvs branch is needed.
cheers,
Tommi Kyntola tommi.kyntola@ray.fi
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Tue, 11 Oct 2005 18:16:12 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_JoyBallEvent</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 Event Structures." | |
| 14 HREF="eventstructures.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_JoyHatEvent" | |
| 17 HREF="sdljoyhatevent.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_ResizeEvent" | |
| 20 HREF="sdlresizeevent.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="REFENTRY" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
|
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31 SUMMARY="Header navigation table" |
| 0 | 32 WIDTH="100%" |
| 33 BORDER="0" | |
| 34 CELLPADDING="0" | |
| 35 CELLSPACING="0" | |
| 36 ><TR | |
| 37 ><TH | |
| 38 COLSPAN="3" | |
| 39 ALIGN="center" | |
| 40 >SDL Library Documentation</TH | |
| 41 ></TR | |
| 42 ><TR | |
| 43 ><TD | |
| 44 WIDTH="10%" | |
| 45 ALIGN="left" | |
| 46 VALIGN="bottom" | |
| 47 ><A | |
| 48 HREF="sdljoyhatevent.html" | |
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49 ACCESSKEY="P" |
| 0 | 50 >Prev</A |
| 51 ></TD | |
| 52 ><TD | |
| 53 WIDTH="80%" | |
| 54 ALIGN="center" | |
| 55 VALIGN="bottom" | |
| 56 ></TD | |
| 57 ><TD | |
| 58 WIDTH="10%" | |
| 59 ALIGN="right" | |
| 60 VALIGN="bottom" | |
| 61 ><A | |
| 62 HREF="sdlresizeevent.html" | |
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63 ACCESSKEY="N" |
| 0 | 64 >Next</A |
| 65 ></TD | |
| 66 ></TR | |
| 67 ></TABLE | |
| 68 ><HR | |
| 69 ALIGN="LEFT" | |
| 70 WIDTH="100%"></DIV | |
| 71 ><H1 | |
| 72 ><A | |
| 73 NAME="SDLJOYBALLEVENT" | |
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74 ></A |
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75 >SDL_JoyBallEvent</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN4396" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_JoyBallEvent -- Joystick trackball motion event structure</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSECT1" | |
| 86 ><A | |
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87 NAME="AEN4399" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Structure Definition</H2 | |
| 91 ><PRE | |
| 92 CLASS="PROGRAMLISTING" | |
| 93 >typedef struct{ | |
| 94 Uint8 type; | |
| 95 Uint8 which; | |
| 96 Uint8 ball; | |
| 97 Sint16 xrel, yrel; | |
| 98 } SDL_JoyBallEvent;</PRE | |
| 99 ></DIV | |
| 100 ><DIV | |
| 101 CLASS="REFSECT1" | |
| 102 ><A | |
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103 NAME="AEN4402" |
| 0 | 104 ></A |
| 105 ><H2 | |
| 106 >Structure Data</H2 | |
| 107 ><DIV | |
| 108 CLASS="INFORMALTABLE" | |
| 109 ><A | |
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110 NAME="AEN4404" |
| 0 | 111 ></A |
| 112 ><P | |
| 113 ></P | |
| 114 ><TABLE | |
| 115 BORDER="0" | |
| 116 CLASS="CALSTABLE" | |
| 117 ><TBODY | |
| 118 ><TR | |
| 119 ><TD | |
| 120 ALIGN="LEFT" | |
| 121 VALIGN="TOP" | |
| 122 ><TT | |
| 123 CLASS="STRUCTFIELD" | |
| 124 ><I | |
| 125 >type</I | |
| 126 ></TT | |
| 127 ></TD | |
| 128 ><TD | |
| 129 ALIGN="LEFT" | |
| 130 VALIGN="TOP" | |
| 131 ><TT | |
| 132 CLASS="LITERAL" | |
| 133 >SDL_JOYBALLMOTION</TT | |
| 134 ></TD | |
| 135 ></TR | |
| 136 ><TR | |
| 137 ><TD | |
| 138 ALIGN="LEFT" | |
| 139 VALIGN="TOP" | |
| 140 ><TT | |
| 141 CLASS="STRUCTFIELD" | |
| 142 ><I | |
| 143 >which</I | |
| 144 ></TT | |
| 145 ></TD | |
| 146 ><TD | |
| 147 ALIGN="LEFT" | |
| 148 VALIGN="TOP" | |
| 149 >Joystick device index</TD | |
| 150 ></TR | |
| 151 ><TR | |
| 152 ><TD | |
| 153 ALIGN="LEFT" | |
| 154 VALIGN="TOP" | |
| 155 ><TT | |
| 156 CLASS="STRUCTFIELD" | |
| 157 ><I | |
| 158 >ball</I | |
| 159 ></TT | |
| 160 ></TD | |
| 161 ><TD | |
| 162 ALIGN="LEFT" | |
| 163 VALIGN="TOP" | |
| 164 >Joystick trackball index</TD | |
| 165 ></TR | |
| 166 ><TR | |
| 167 ><TD | |
| 168 ALIGN="LEFT" | |
| 169 VALIGN="TOP" | |
| 170 ><TT | |
| 171 CLASS="STRUCTFIELD" | |
| 172 ><I | |
| 173 >xrel</I | |
| 174 ></TT | |
| 175 >, <TT | |
| 176 CLASS="STRUCTFIELD" | |
| 177 ><I | |
| 178 >yrel</I | |
| 179 ></TT | |
| 180 ></TD | |
| 181 ><TD | |
| 182 ALIGN="LEFT" | |
| 183 VALIGN="TOP" | |
| 184 >The relative motion in the X/Y direction</TD | |
| 185 ></TR | |
| 186 ></TBODY | |
| 187 ></TABLE | |
| 188 ><P | |
| 189 ></P | |
| 190 ></DIV | |
| 191 ></DIV | |
| 192 ><DIV | |
| 193 CLASS="REFSECT1" | |
| 194 ><A | |
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195 NAME="AEN4425" |
| 0 | 196 ></A |
| 197 ><H2 | |
| 198 >Description</H2 | |
| 199 ><P | |
| 200 ><SPAN | |
| 201 CLASS="STRUCTNAME" | |
| 202 >SDL_JoyBallEvent</SPAN | |
| 203 > is a member of the <A | |
| 204 HREF="sdlevent.html" | |
| 205 ><SPAN | |
| 206 CLASS="STRUCTNAME" | |
| 207 >SDL_Event</SPAN | |
| 208 ></A | |
| 209 > union and is used when an event of type <TT | |
| 210 CLASS="LITERAL" | |
| 211 >SDL_JOYBALLMOTION</TT | |
| 212 > is reported.</P | |
| 213 ><P | |
| 214 >A <TT | |
| 215 CLASS="LITERAL" | |
| 216 >SDL_JOYBALLMOTION</TT | |
| 217 > event occurs when a user moves a trackball on the joystick. The field <TT | |
| 218 CLASS="STRUCTFIELD" | |
| 219 ><I | |
| 220 >which</I | |
| 221 ></TT | |
| 222 > is the index of the joystick that reported the event and <TT | |
| 223 CLASS="STRUCTFIELD" | |
| 224 ><I | |
| 225 >ball</I | |
| 226 ></TT | |
| 227 > is the index of the trackball (for a more detailed explaination see the <A | |
| 228 HREF="joystick.html" | |
| 229 >Joystick section</A | |
| 230 >). Trackballs only return relative motion, this is the change in position on the ball since it was last polled (last cycle of the event loop) and it is stored in <TT | |
| 231 CLASS="STRUCTFIELD" | |
| 232 ><I | |
| 233 >xrel</I | |
| 234 ></TT | |
| 235 > and <TT | |
| 236 CLASS="STRUCTFIELD" | |
| 237 ><I | |
| 238 >yrel</I | |
| 239 ></TT | |
| 240 >.</P | |
| 241 ></DIV | |
| 242 ><DIV | |
| 243 CLASS="REFSECT1" | |
| 244 ><A | |
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245 NAME="AEN4439" |
| 0 | 246 ></A |
| 247 ><H2 | |
| 248 >See Also</H2 | |
| 249 ><P | |
| 250 ><A | |
| 251 HREF="sdlevent.html" | |
| 252 ><SPAN | |
| 253 CLASS="STRUCTNAME" | |
| 254 >SDL_Event</SPAN | |
| 255 ></A | |
| 256 >, | |
| 257 <A | |
| 258 HREF="joystick.html" | |
| 259 >Joystick Functions</A | |
| 260 >, | |
| 261 <A | |
| 262 HREF="sdljoystickeventstate.html" | |
| 263 ><TT | |
| 264 CLASS="FUNCTION" | |
| 265 >SDL_JoystickEventState</TT | |
| 266 ></A | |
| 267 >, | |
| 268 <A | |
| 269 HREF="sdljoystickgetball.html" | |
| 270 ><TT | |
| 271 CLASS="FUNCTION" | |
| 272 >SDL_JoystickGetBall</TT | |
| 273 ></A | |
| 274 ></P | |
| 275 ></DIV | |
| 276 ><DIV | |
| 277 CLASS="NAVFOOTER" | |
| 278 ><HR | |
| 279 ALIGN="LEFT" | |
| 280 WIDTH="100%"><TABLE | |
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281 SUMMARY="Footer navigation table" |
| 0 | 282 WIDTH="100%" |
| 283 BORDER="0" | |
| 284 CELLPADDING="0" | |
| 285 CELLSPACING="0" | |
| 286 ><TR | |
| 287 ><TD | |
| 288 WIDTH="33%" | |
| 289 ALIGN="left" | |
| 290 VALIGN="top" | |
| 291 ><A | |
| 292 HREF="sdljoyhatevent.html" | |
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293 ACCESSKEY="P" |
| 0 | 294 >Prev</A |
| 295 ></TD | |
| 296 ><TD | |
| 297 WIDTH="34%" | |
| 298 ALIGN="center" | |
| 299 VALIGN="top" | |
| 300 ><A | |
| 301 HREF="index.html" | |
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302 ACCESSKEY="H" |
| 0 | 303 >Home</A |
| 304 ></TD | |
| 305 ><TD | |
| 306 WIDTH="33%" | |
| 307 ALIGN="right" | |
| 308 VALIGN="top" | |
| 309 ><A | |
| 310 HREF="sdlresizeevent.html" | |
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311 ACCESSKEY="N" |
| 0 | 312 >Next</A |
| 313 ></TD | |
| 314 ></TR | |
| 315 ><TR | |
| 316 ><TD | |
| 317 WIDTH="33%" | |
| 318 ALIGN="left" | |
| 319 VALIGN="top" | |
| 320 >SDL_JoyHatEvent</TD | |
| 321 ><TD | |
| 322 WIDTH="34%" | |
| 323 ALIGN="center" | |
| 324 VALIGN="top" | |
| 325 ><A | |
| 326 HREF="eventstructures.html" | |
|
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327 ACCESSKEY="U" |
| 0 | 328 >Up</A |
| 329 ></TD | |
| 330 ><TD | |
| 331 WIDTH="33%" | |
| 332 ALIGN="right" | |
| 333 VALIGN="top" | |
| 334 >SDL_ResizeEvent</TD | |
| 335 ></TR | |
| 336 ></TABLE | |
| 337 ></DIV | |
| 338 ></BODY | |
| 339 ></HTML | |
| 340 > |