Mercurial > sdl-ios-xcode
view test/testpower.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 | 51750b7a966f |
children |
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line source
/* Simple test of power subsystem. */ #include <stdio.h> #include "SDL.h" static void report_power(void) { int seconds, percent; const SDL_PowerState state = SDL_GetPowerInfo(&seconds, &percent); char *statestr = NULL; printf("SDL-reported power info...\n"); switch (state) { case SDL_POWERSTATE_UNKNOWN: statestr = "Unknown"; break; case SDL_POWERSTATE_ON_BATTERY: statestr = "On battery"; break; case SDL_POWERSTATE_NO_BATTERY: statestr = "No battery"; break; case SDL_POWERSTATE_CHARGING: statestr = "Charging"; break; case SDL_POWERSTATE_CHARGED: statestr = "Charged"; break; default: statestr = "!!API ERROR!!"; break; } printf("State: %s\n", statestr); if (percent == -1) { printf("Percent left: unknown\n"); } else { printf("Percent left: %d%%\n", percent); } if (seconds == -1) { printf("Time left: unknown\n"); } else { printf("Time left: %d minutes, %d seconds\n", (int) (seconds / 60), (int) (seconds % 60)); } } int main(int argc, char *argv[]) { if (SDL_Init(SDL_INIT_VIDEO) == -1) { fprintf(stderr, "SDL_Init() failed: %s\n", SDL_GetError()); return 1; } report_power(); SDL_Quit(); return 0; } /* end of testpower.c ... */