Mercurial > sdl-ios-xcode
view test/testkeys.c @ 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> |
---|---|
date | Fri, 27 Nov 2009 19:29:27 +0000 |
parents | 1a8bab15a45d |
children | 25d4feb7c127 |
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/* Print out all the scancodes we have, just to verify them */ #include <stdio.h> #include <ctype.h> #include <stdlib.h> #include <string.h> #include "SDL.h" int main(int argc, char *argv[]) { SDL_scancode scancode; if (SDL_Init(SDL_INIT_VIDEO) < 0) { fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); exit(1); } for (scancode = 0; scancode < SDL_NUM_SCANCODES; ++scancode) { printf("Scancode #%d, \"%s\"\n", scancode, SDL_GetScancodeName(scancode)); } SDL_Quit(); return (0); }