Mercurial > sdl-ios-xcode
annotate docs/html/sdljoystickgetball.html @ 886:05c551e5bc64
Date: Sat, 24 Apr 2004 15:13:32 +0300
From: "Mike Gorchak"
Subject: SDL updates for the QNX6
1. Updated the README.QNX
2. Updated libtool scripts, which are shipped with SDL for QNX6 support.
3. Added some code to support the new QNX 6.3.0, which is in beta now.
4. Added code to detect the hw features, which driver supports.
5. Added hw alpha blits code.
6. Fixed bug when application switches to fullscreen more the 2 times. (afte\
r that window becames always stay on top).
7. Updated a bit README for the tests.
8. Added information about acceleration show in the testalpha.c test.
9. Added small fixes to the testoverlay2.c test.
10. Added alpha and cc+alpha blits benchmarks to the testvidinfo.c test.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 06 May 2004 15:55:06 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_JoystickGetBall</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="Joystick" | |
| 14 HREF="joystick.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_JoystickGetButton" | |
| 17 HREF="sdljoystickgetbutton.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_JoystickClose" | |
| 20 HREF="sdljoystickclose.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="sdljoystickgetbutton.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="sdljoystickclose.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="SDLJOYSTICKGETBALL" | |
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74 ></A |
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75 >SDL_JoystickGetBall</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN6433" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_JoystickGetBall -- Get relative trackball motion</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN6436" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN6437" |
| 0 | 95 ></A |
| 96 ><P | |
| 97 ></P | |
| 98 ><PRE | |
| 99 CLASS="FUNCSYNOPSISINFO" | |
| 100 >#include "SDL.h"</PRE | |
| 101 ><P | |
| 102 ><CODE | |
| 103 ><CODE | |
| 104 CLASS="FUNCDEF" | |
| 105 >int <B | |
| 106 CLASS="FSFUNC" | |
| 107 >SDL_JoystickGetBall</B | |
| 108 ></CODE | |
| 109 >(SDL_Joystick *joystick, int ball, int *dx, int *dy);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN6443" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >Get the <TT | |
| 124 CLASS="PARAMETER" | |
| 125 ><I | |
| 126 >ball</I | |
| 127 ></TT | |
| 128 > axis change.</P | |
| 129 ><P | |
| 130 >Trackballs can only return relative motion since the last call to <TT | |
| 131 CLASS="FUNCTION" | |
| 132 >SDL_JoystickGetBall</TT | |
| 133 >, these motion deltas a placed into <TT | |
| 134 CLASS="PARAMETER" | |
| 135 ><I | |
| 136 >dx</I | |
| 137 ></TT | |
| 138 > and <TT | |
| 139 CLASS="PARAMETER" | |
| 140 ><I | |
| 141 >dy</I | |
| 142 ></TT | |
| 143 >.</P | |
| 144 ></DIV | |
| 145 ><DIV | |
| 146 CLASS="REFSECT1" | |
| 147 ><A | |
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148 NAME="AEN6451" |
| 0 | 149 ></A |
| 150 ><H2 | |
| 151 >Return Value</H2 | |
| 152 ><P | |
| 153 >Returns <SPAN | |
| 154 CLASS="RETURNVALUE" | |
| 155 >0</SPAN | |
| 156 > on success or <SPAN | |
| 157 CLASS="RETURNVALUE" | |
| 158 >-1</SPAN | |
| 159 > on failure</P | |
| 160 ></DIV | |
| 161 ><DIV | |
| 162 CLASS="REFSECT1" | |
| 163 ><A | |
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164 NAME="AEN6456" |
| 0 | 165 ></A |
| 166 ><H2 | |
| 167 >Examples</H2 | |
| 168 ><P | |
| 169 ><PRE | |
| 170 CLASS="PROGRAMLISTING" | |
| 171 >int delta_x, delta_y; | |
| 172 SDL_Joystick *joy; | |
| 173 . | |
| 174 . | |
| 175 . | |
| 176 SDL_JoystickUpdate(); | |
| 177 if(SDL_JoystickGetBall(joy, 0, &delta_x, &delta_y)==-1) | |
| 178 printf("TrackBall Read Error!\n"); | |
| 179 printf("Trackball Delta- X:%d, Y:%d\n", delta_x, delta_y);</PRE | |
| 180 ></P | |
| 181 ></DIV | |
| 182 ><DIV | |
| 183 CLASS="REFSECT1" | |
| 184 ><A | |
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185 NAME="AEN6460" |
| 0 | 186 ></A |
| 187 ><H2 | |
| 188 >See Also</H2 | |
| 189 ><P | |
| 190 ><A | |
| 191 HREF="sdljoysticknumballs.html" | |
| 192 ><TT | |
| 193 CLASS="FUNCTION" | |
| 194 >SDL_JoystickNumBalls</TT | |
| 195 ></A | |
| 196 ></P | |
| 197 ></DIV | |
| 198 ><DIV | |
| 199 CLASS="NAVFOOTER" | |
| 200 ><HR | |
| 201 ALIGN="LEFT" | |
| 202 WIDTH="100%"><TABLE | |
|
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203 SUMMARY="Footer navigation table" |
| 0 | 204 WIDTH="100%" |
| 205 BORDER="0" | |
| 206 CELLPADDING="0" | |
| 207 CELLSPACING="0" | |
| 208 ><TR | |
| 209 ><TD | |
| 210 WIDTH="33%" | |
| 211 ALIGN="left" | |
| 212 VALIGN="top" | |
| 213 ><A | |
| 214 HREF="sdljoystickgetbutton.html" | |
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215 ACCESSKEY="P" |
| 0 | 216 >Prev</A |
| 217 ></TD | |
| 218 ><TD | |
| 219 WIDTH="34%" | |
| 220 ALIGN="center" | |
| 221 VALIGN="top" | |
| 222 ><A | |
| 223 HREF="index.html" | |
|
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224 ACCESSKEY="H" |
| 0 | 225 >Home</A |
| 226 ></TD | |
| 227 ><TD | |
| 228 WIDTH="33%" | |
| 229 ALIGN="right" | |
| 230 VALIGN="top" | |
| 231 ><A | |
| 232 HREF="sdljoystickclose.html" | |
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233 ACCESSKEY="N" |
| 0 | 234 >Next</A |
| 235 ></TD | |
| 236 ></TR | |
| 237 ><TR | |
| 238 ><TD | |
| 239 WIDTH="33%" | |
| 240 ALIGN="left" | |
| 241 VALIGN="top" | |
| 242 >SDL_JoystickGetButton</TD | |
| 243 ><TD | |
| 244 WIDTH="34%" | |
| 245 ALIGN="center" | |
| 246 VALIGN="top" | |
| 247 ><A | |
| 248 HREF="joystick.html" | |
|
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249 ACCESSKEY="U" |
| 0 | 250 >Up</A |
| 251 ></TD | |
| 252 ><TD | |
| 253 WIDTH="33%" | |
| 254 ALIGN="right" | |
| 255 VALIGN="top" | |
| 256 >SDL_JoystickClose</TD | |
| 257 ></TR | |
| 258 ></TABLE | |
| 259 ></DIV | |
| 260 ></BODY | |
| 261 ></HTML | |
| 262 > |