Mercurial > sdl-ios-xcode
view test/testaudioinfo.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 | 5ea5e4e6103f |
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#include <stdio.h> #include "SDL.h" static void print_devices(int iscapture) { const char *typestr = ((iscapture) ? "capture" : "output"); int n = SDL_GetNumAudioDevices(iscapture); printf("%s devices:\n", typestr); if (n == -1) printf(" Driver can't detect specific devices.\n\n", typestr); else if (n == 0) printf(" No %s devices found.\n\n", typestr); else { int i; for (i = 0; i < n; i++) { printf(" %s\n", SDL_GetAudioDeviceName(i, iscapture)); } printf("\n"); } } int main(int argc, char **argv) { /* Print available audio drivers */ int n = SDL_GetNumAudioDrivers(); if (n == 0) { printf("No built-in audio drivers\n\n"); } else { int i; printf("Built-in audio drivers:\n"); for (i = 0; i < n; ++i) { printf(" %s\n", SDL_GetAudioDriver(i)); } printf("\n"); } /* Load the SDL library */ if (SDL_Init(SDL_INIT_AUDIO) < 0) { fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); return (1); } printf("Using audio driver: %s\n\n", SDL_GetCurrentAudioDriver()); print_devices(0); print_devices(1); SDL_Quit(); return 0; }