#define DEGHR(x) ((x)/15.)
#define RADHR(x) DEGHR(x*SGD_RADIANS_TO_DEGREES)
+using std::string;
static const double MJD0 = 2415020.0;
static const double J2000 = 2451545.0 - MJD0;
static const double SIDRATE = 0.9972695677;
+// tzContainer stores all the current Timezone control points/
+std::auto_ptr<SGTimeZoneContainer> static_tzContainer;
-void SGTime::init( double lon_rad, double lat_rad,
- const string& root, time_t init_time )
+void SGTime::init( const SGGeod& location, const SGPath& root, time_t init_time )
{
- SG_LOG( SG_EVENT, SG_INFO, "Initializing Time" );
-
gst_diff = -9999.0;
if ( init_time ) {
cur_time = time(NULL);
}
- SG_LOG( SG_EVENT, SG_INFO,
+ SG_LOG( SG_EVENT, SG_DEBUG,
"Current greenwich mean time = " << asctime(gmtime(&cur_time)));
- SG_LOG( SG_EVENT, SG_INFO,
+ SG_LOG( SG_EVENT, SG_DEBUG,
"Current local time = " << asctime(localtime(&cur_time)));
- if ( !root.empty()) {
- SGPath zone( root );
- zone.append( "zone.tab" );
- SG_LOG( SG_EVENT, SG_INFO, "Reading timezone info from: "
- << zone.str() );
- tzContainer = new SGTimeZoneContainer( zone.c_str() );
- SGGeod location(SGGeod::fromRad(lon_rad, lat_rad));
- SGTimeZone* nearestTz = tzContainer->getNearest(location);
+ if ( !root.isNull()) {
+ if (!static_tzContainer.get()) {
+ SGPath zone( root );
+ zone.append( "zone.tab" );
+ SG_LOG( SG_EVENT, SG_INFO, "Reading timezone info from: "
+ << zone.str() );
+ static_tzContainer.reset(new SGTimeZoneContainer( zone.c_str() ));
+ }
+
+ SGTimeZone* nearestTz = static_tzContainer->getNearest(location);
SGPath name( root );
name.append( nearestTz->getDescription() );
zonename = name.str();
- SG_LOG( SG_EVENT, SG_INFO, "Using zonename = " << zonename );
+ SG_LOG( SG_EVENT, SG_DEBUG, "Using zonename = " << zonename );
} else {
- SG_LOG( SG_EVENT, SG_INFO, "*** NO TIME ZONE NAME ***" );
- tzContainer = NULL;
zonename.erase();
}
}
-SGTime::SGTime( double lon_rad, double lat_rad, const string& root,
- time_t init_time )
+SGTime::SGTime( const SGGeod& location, const SGPath& root,
+ time_t init_time )
{
- init( lon_rad, lat_rad, root, init_time );
+ init(location, root, init_time);
}
-
-SGTime::SGTime( const string& root ) {
- init( 0.0, 0.0, root, 0 );
+SGTime::SGTime( const SGPath& root ) {
+ init( SGGeod(), root, 0 );
}
SGTime::SGTime() {
- init( 0.0, 0.0, "", 0 );
+ init( SGGeod(), SGPath(), 0 );
}
SGTime::~SGTime()
{
- delete tzContainer;
}
{
time_t start_gmt, now;
double diff, part, days, hours, lstTmp;
- char tbuf[64];
now = cur_time;
start_gmt = sgTimeGetGMT(gmt->tm_year, 2, 21, 12, 0, 0);
- SG_LOG( SG_EVENT, SG_DEBUG, " COURSE: GMT = "
- << sgTimeFormatTime(gmt, tbuf) );
- SG_LOG( SG_EVENT, SG_DEBUG, " March 21 noon (GMT) = " << start_gmt );
-
diff = (now - start_gmt) / (3600.0 * 24.0);
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Time since 3/21/" << gmt->tm_year << " GMT = " << diff );
-
part = fmod(diff, 1.0);
days = diff - part;
hours = gmt->tm_hour + gmt->tm_min/60.0 + gmt->tm_sec/3600.0;
while ( lstTmp < 0.0 ) {
lstTmp += 24.0;
}
-
- SG_LOG( SG_EVENT, SG_DEBUG,
- " days = " << days << " hours = " << hours << " lon = "
- << lng << " lst = " << lstTmp );
-
+
return lstTmp;
}
-
// Update the time related variables
-void SGTime::update( double lon_rad, double lat_rad,
- time_t ct, long int warp )
+void SGTime::update( const SGGeod& location, time_t ct, long int warp )
{
double gst_precise, gst_course;
tm * gmt = &m_gmt;
- SG_LOG( SG_EVENT, SG_DEBUG, "Updating time" );
-
// get current Unix calendar time (in seconds)
// warp += warp_delta;
if ( ct ) {
} else {
cur_time = time(NULL) + warp;
}
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current Unix calendar time = " << cur_time
- << " warp = " << warp );
// get GMT break down for current time
memcpy( gmt, gmtime(&cur_time), sizeof(tm) );
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current GMT = " << gmt->tm_mon+1 << "/"
- << gmt->tm_mday << "/" << (1900 + gmt->tm_year) << " "
- << gmt->tm_hour << ":" << gmt->tm_min << ":"
- << gmt->tm_sec );
-
// calculate modified Julian date starting with current
mjd = sgTimeCurrentMJD( ct, warp );
// convert "back" to Julian date + partial day (as a fraction of one)
jd = mjd + MJD0;
- SG_LOG( SG_EVENT, SG_DEBUG, " Current Julian Date = " << jd );
// printf(" Current Longitude = %.3f\n", FG_Longitude * SGD_RADIANS_TO_DEGREES);
if ( gst_diff < -100.0 ) {
// first time through do the expensive calculation & cheap
// calculation to get the difference.
- SG_LOG( SG_EVENT, SG_INFO, " First time, doing precise gst" );
+ SG_LOG( SG_EVENT, SG_DEBUG, " First time, doing precise gst" );
gst_precise = gst = sidereal_precise( mjd, 0.00 );
gst_course = sidereal_course( cur_time, gmt, 0.00 );
gst_diff = gst_precise - gst_course;
lst = sidereal_course( cur_time, gmt,
- -(lon_rad * SGD_RADIANS_TO_DEGREES) ) + gst_diff;
+ -location.getLongitudeDeg() ) + gst_diff;
} else {
// course + difference should drift off very slowly
gst = sidereal_course( cur_time, gmt, 0.00 ) + gst_diff;
lst = sidereal_course( cur_time, gmt,
- -(lon_rad * SGD_RADIANS_TO_DEGREES) ) + gst_diff;
+ -location.getLongitudeDeg() ) + gst_diff;
}
-
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current lon=0.00 Sidereal Time = " << gst );
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current LOCAL Sidereal Time = " << lst << " ("
- << sidereal_precise( mjd, -(lon_rad * SGD_RADIANS_TO_DEGREES) )
- << ") (diff = " << gst_diff << ")" );
}
// Given lon/lat, update timezone information and local_offset
-void SGTime::updateLocal( double lon_rad, double lat_rad, const string& root ) {
- // sanity checking
- if ( lon_rad < -SGD_PI || lon_rad> SGD_PI ) {
- // not within -180 ... 180
- lon_rad = 0.0;
- }
- if ( lat_rad < -SGD_PI_2 || lat_rad > SGD_PI_2 ) {
- // not within -90 ... 90
- lat_rad = 0.0;
- }
- if ( lon_rad != lon_rad ) {
- // only true if lon_rad == nan
- SG_LOG( SG_EVENT, SG_ALERT,
- " Detected lon_rad == nan, resetting to 0.0" );
- lon_rad = 0.0;
- }
- if ( lat_rad != lat_rad ) {
- // only true if lat_rad == nan
- SG_LOG( SG_EVENT, SG_ALERT,
- " Detected lat_rad == nan, resetting to 0.0" );
- lat_rad = 0.0;
+void SGTime::updateLocal( const SGGeod& aLocation, const string& root ) {
+ SGGeod location(aLocation);
+ if (!aLocation.isValid()) {
+ location = SGGeod();
}
+
time_t currGMT;
time_t aircraftLocalTime;
- SGGeod location(SGGeod::fromRad(lon_rad, lat_rad));
- SGTimeZone* nearestTz = tzContainer->getNearest(location);
+ SGTimeZone* nearestTz = static_tzContainer->getNearest(location);
SGPath zone( root );
zone.append ( nearestTz->getDescription() );
zonename = zone.str();
} else {
cur_time = time(NULL) + warp;
}
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current Unix calendar time = " << cur_time
- << " warp = " << warp );
// get GMT break down for current time
memcpy( gmt, gmtime(&cur_time), sizeof(tm) );
- SG_LOG( SG_EVENT, SG_DEBUG,
- " Current GMT = " << gmt->tm_mon+1 << "/"
- << gmt->tm_mday << "/" << (1900 + gmt->tm_year) << " "
- << gmt->tm_hour << ":" << gmt->tm_min << ":"
- << gmt->tm_sec );
// calculate modified Julian date
// t->mjd = cal_mjd ((int)(t->gmt->tm_mon+1), (double)t->gmt->tm_mday,
x /= 3600.0;
gst = (1.0/SIDRATE)*hr + x;
- SG_LOG( SG_EVENT, SG_DEBUG, " gst => " << gst );
-
return gst;
}
if ( daylight > 0 ) {
daylight = 1;
} else if ( daylight < 0 ) {
- SG_LOG( SG_EVENT, FG_WARN,
+ SG_LOG( SG_EVENT, SG_WARN,
"OOOPS, problem in sg_time.cxx, no daylight savings info." );
}
projects / simgear.git / blobdiff