Mercurial > sdl-ios-xcode
view test/testwm2.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 | 9de326b3099c |
children | 58265e606e4e |
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line source
#include <stdlib.h> #include <stdio.h> #include "common.h" static CommonState *state; /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ static void quit(int rc) { CommonQuit(state); exit(rc); } int main(int argc, char *argv[]) { int i, done; SDL_Event event; /* Initialize test framework */ state = CommonCreateState(argv, SDL_INIT_VIDEO); if (!state) { return 1; } state->skip_renderer = SDL_TRUE; for (i = 1; i < argc;) { int consumed; consumed = CommonArg(state, i); if (consumed == 0) { consumed = -1; } if (consumed < 0) { fprintf(stderr, "Usage: %s %s\n", argv[0], CommonUsage(state)); quit(1); } i += consumed; } if (!CommonInit(state)) { quit(2); } /* Main render loop */ done = 0; while (!done) { /* Check for events */ while (SDL_PollEvent(&event)) { CommonEvent(state, &event, &done); } } quit(0); // keep the compiler happy ... return(0); } /* vi: set ts=4 sw=4 expandtab: */