Mercurial > sdl-ios-xcode
annotate INSTALL @ 3496:78fc8ea578b2
Joe 2009-11-23 21:31:10 PST
If type is ::SDL_HAPTIC_CARTESIAN, direction is encoded by three positions
367 * (X axis, Y axis and Z axis (with 3 axes)). ::SDL_HAPTIC_CARTESIAN
uses
368 * the first three \c dir parameters. The cardinal directions would
be:
369 * - North: 0,-1, 0
370 * - East: -1, 0, 0
371 * - South: 0, 1, 0
372 * - West: 1, 0, 0
typedef struct SDL_HapticDirection
{
Uint8 type; /**< The type of encoding. */
Uint16 dir[3]; /**< The encoded direction. */
} SDL_HapticDirection;
An unsigned int can't store negative values and I don't see an alternate way to
encode them in the docs or source. The best I have been able to come up with is
using a negative magnitude for the effect but this will only get me 2 of the 4
quadrants in the plane for 2d effects. I looked at the win32 and linux
implementations and I believe is is safe to use signed ints in the direction
struct. I am unfamiliar with the darwin haptics API so I don't know if it is
safe.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Fri, 27 Nov 2009 19:29:27 +0000 |
parents | 0a45995a7fc3 |
children | 00e7c6b7eb03 |
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0 | 1 |
2 To compile and install SDL: | |
3 | |
4 1. Run './configure; make; make install' | |
5 | |
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Date: Tue, 2 Mar 2004 11:34:54 +0100
Sam Lantinga <slouken@libsdl.org>
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6 If you are compiling for Windows using gcc, read the FAQ at: |
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Date: Tue, 2 Mar 2004 11:34:54 +0100
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7 http://www.libsdl.org/faq.php?action=listentries&category=4#42 |
0 | 8 |
9 If you are compiling using Visual C++ on Win32, you should read | |
10 the file VisualC.html | |
11 | |
12 2. Look at the example programs in ./test, and check out the HTML | |
13 documentation in ./docs to see how to use the SDL library. | |
14 | |
15 3. Join the SDL developer mailing list by sending E-mail to | |
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16 sdl-request@libsdl.org |
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17 and put "subscribe" in the subject of the message. |
0 | 18 |
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19 Or alternatively you can use the web interface: |
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Sam Lantinga <slouken@libsdl.org>
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20 http://www.libsdl.org/mailing-list.php |
0 | 21 |
22 That's it! | |
23 Sam Lantinga <slouken@libsdl.org> |