#include <stdlib.h>
#include <algorithm>
+#include <simgear/structure/commands.hxx>
+#include <simgear/structure/exception.hxx>
+
+#include <Airports/simple.hxx>
#include <Main/fg_props.hxx>
+#include <Main/util.hxx>
#include "environment_mgr.hxx"
#include "environment_ctrl.hxx"
////////////////////////////////////////////////////////////////////////
FGMetarEnvironmentCtrl::FGMetarEnvironmentCtrl ()
- : _icao( strdup( fgGetString("/sim/presets/airport-id") ) )
+ : env( new FGInterpolateEnvironmentCtrl ),
+ _icao( "" ),
+ search_interval_sec( 60.0 ), // 1 minute
+ same_station_interval_sec( 900.0 ), // 15 minutes
+ search_elapsed( 9999.0 ),
+ fetch_elapsed( 9999.0 ),
+ proxy_host( fgGetNode("/sim/presets/proxy/host", true) ),
+ proxy_port( fgGetNode("/sim/presets/proxy/port", true) ),
+ proxy_auth( fgGetNode("/sim/presets/proxy/authentication", true) ),
+ _error_dt( 0.0 ),
+ _error_count( 0 )
{
+#if defined(ENABLE_THREADS) && ENABLE_THREADS
+ thread = new MetarThread(this);
+ thread->start();
+#endif // ENABLE_THREADS
}
FGMetarEnvironmentCtrl::~FGMetarEnvironmentCtrl ()
{
- if (_icao) {
- free(_icao);
- _icao = NULL;
- }
+#if defined(ENABLE_THREADS) && ENABLE_THREADS
+ thread->cancel();
+ thread->join();
+#endif // ENABLE_THREADS
+
+ delete env;
+ env = NULL;
+}
+
+
+// use a "command" to set station temp at station elevation
+static void set_temp_at_altitude( float temp_degc, float altitude_ft ) {
+ SGPropertyNode args;
+ SGPropertyNode *node = args.getNode("temp-degc", 0, true);
+ node->setFloatValue( temp_degc );
+ node = args.getNode("altitude-ft", 0, true);
+ node->setFloatValue( altitude_ft );
+ globals->get_commands()->execute("set-outside-air-temp-degc", &args);
}
+static void set_dewpoint_at_altitude( float dewpoint_degc, float altitude_ft ) {
+ SGPropertyNode args;
+ SGPropertyNode *node = args.getNode("dewpoint-degc", 0, true);
+ node->setFloatValue( dewpoint_degc );
+ node = args.getNode("altitude-ft", 0, true);
+ node->setFloatValue( altitude_ft );
+ globals->get_commands()->execute("set-dewpoint-temp-degc", &args);
+}
+
+
+void
+FGMetarEnvironmentCtrl::update_env_config ()
+{
+ fgSetupWind( fgGetDouble("/environment/metar/base-wind-range-from"),
+ fgGetDouble("/environment/metar/base-wind-range-to"),
+ fgGetDouble("/environment/metar/base-wind-speed-kt"),
+ fgGetDouble("/environment/metar/gust-wind-speed-kt") );
+
+ fgDefaultWeatherValue( "visibility-m",
+ fgGetDouble("/environment/metar/min-visibility-m") );
+ set_temp_at_altitude( fgGetDouble("/environment/metar/temperature-degc"),
+ station_elevation_ft );
+ set_dewpoint_at_altitude( fgGetDouble("/environment/metar/dewpoint-degc"),
+ station_elevation_ft );
+ fgDefaultWeatherValue( "pressure-sea-level-inhg",
+ fgGetDouble("/environment/metar/pressure-inhg") );
+}
+
void
FGMetarEnvironmentCtrl::init ()
{
- if (_icao != NULL) {
- free(_icao);
- _icao = NULL;
+ const SGPropertyNode *longitude
+ = fgGetNode( "/position/longitude-deg", true );
+ const SGPropertyNode *latitude
+ = fgGetNode( "/position/latitude-deg", true );
+
+ bool found_metar = false;
+
+ while ( !found_metar && (_error_count < 3) ) {
+ FGAirport a = globals->get_airports()
+ ->search( longitude->getDoubleValue(),
+ latitude->getDoubleValue(),
+ true );
+ FGMetarResult result = fetch_data( a.id );
+ if ( result.m != NULL ) {
+ SG_LOG( SG_GENERAL, SG_INFO, "closest station w/ metar = " << a.id);
+ last_apt = a;
+ _icao = a.id;
+ search_elapsed = 0.0;
+ fetch_elapsed = 0.0;
+ update_metar_properties( result.m );
+ update_env_config();
+ env->init();
+ found_metar = true;
+ } else {
+ // mark as no metar so it doesn't show up in subsequent
+ // searches.
+ SG_LOG( SG_GENERAL, SG_INFO, "no metar at metar = " << a.id );
+ globals->get_airports()->no_metar( a.id );
+ }
}
+}
+
+void
+FGMetarEnvironmentCtrl::reinit ()
+{
+ _error_count = 0;
+ _error_dt = 0.0;
- read_table(_icao);
- _base_wind_speed_node =
- fgGetNode("/environment/metar/base-wind-range-from", true);
- _gust_wind_speed_node =
- fgGetNode("/environment/metar/gust-wind-speed-kt", true);
+#if 0
+ update_env_config();
+#endif
- fgSetDouble("/environment/visibility-m",
- fgGetDouble("/environment/metar/min-visibility-m"));
- fgSetDouble("/environment/temperature-degc",
- fgGetDouble("/environment/metar/temperature_degc"));
- fgSetDouble("/environment/dewpoint-degc",
- fgGetDouble("/environment/metar/dewpoint-degc"));
- fgSetDouble("/environment/pressure-inhg",
- fgGetDouble("/environment/metar/pressure-inhg"));
+ env->reinit();
}
void
-FGMetarEnvironmentCtrl::reinit ()
+FGMetarEnvironmentCtrl::update(double delta_time_sec)
{
- init();
+
+ _dt += delta_time_sec;
+ if (_error_count >= 3)
+ return;
+
+ FGMetarResult result;
+
+ static const SGPropertyNode *longitude
+ = fgGetNode( "/position/longitude-deg", true );
+ static const SGPropertyNode *latitude
+ = fgGetNode( "/position/latitude-deg", true );
+ search_elapsed += delta_time_sec;
+ fetch_elapsed += delta_time_sec;
+
+ // if time for a new search request, push it onto the request
+ // queue
+ if ( search_elapsed > search_interval_sec ) {
+ FGAirport a = globals->get_airports()
+ ->search( longitude->getDoubleValue(),
+ latitude->getDoubleValue(),
+ true );
+ if ( last_apt.id != a.id
+ || fetch_elapsed > same_station_interval_sec )
+ {
+ SG_LOG( SG_GENERAL, SG_INFO, "closest station w/ metar = " << a.id);
+ request_queue.push( a.id );
+ last_apt = a;
+ _icao = a.id;
+ search_elapsed = 0.0;
+ fetch_elapsed = 0.0;
+ } else {
+ search_elapsed = 0.0;
+ SG_LOG( SG_GENERAL, SG_INFO, "same station, waiting = "
+ << same_station_interval_sec - fetch_elapsed );
+ }
+ }
+
+#if defined(ENABLE_THREADS) && ENABLE_THREADS
+ // No loader thread running so manually fetch the data
+ string id = "";
+ while ( !request_queue.empty() ) {
+ id = request_queue.front();
+ request_queue.pop();
+ }
+
+ if ( !id.empty() ) {
+ SG_LOG( SG_GENERAL, SG_INFO, "inline fetching = " << id );
+ result = fetch_data( id );
+ result_queue.push( result );
+ }
+#endif // ENABLE_THREADS
+
+ // process any results from the loader.
+ while ( !result_queue.empty() ) {
+ result = result_queue.front();
+ result_queue.pop();
+ if ( result.m != NULL ) {
+ update_metar_properties( result.m );
+ delete result.m;
+ update_env_config();
+ env->reinit();
+ } else {
+ // mark as no metar so it doesn't show up in subsequent
+ // searches, and signal an immediate re-search.
+ SG_LOG( SG_GENERAL, SG_WARN,
+ "no metar at station = " << result.icao );
+ globals->get_airports()->no_metar( result.icao );
+ search_elapsed = 9999.0;
+ }
+ }
+
+ env->update(delta_time_sec);
}
+
void
-FGMetarEnvironmentCtrl::read_table (const char *icao)
+FGMetarEnvironmentCtrl::setEnvironment (FGEnvironment * environment)
{
- char s[128];
- double d, dt;
- int i;
+ env->setEnvironment(environment);
+}
- if ((icao == NULL) && (_icao == NULL)) {
- _icao = strdup( fgGetString("/sim/presets/airport-id") );
+FGMetarResult
+FGMetarEnvironmentCtrl::fetch_data( const string &icao )
+{
+ FGMetarResult result;
+ result.icao = icao;
+
+ // if the last error was more than three seconds ago,
+ // then pretent nothing happened.
+ if (_error_dt < 3) {
+ _error_dt += _dt;
+
+ } else {
+ _error_dt = 0.0;
+ _error_count = 0;
+ }
- } else if (icao != NULL) {
- if (_icao != NULL)
- free(_icao);
+ // fetch station elevation if exists
+ FGAirport a = globals->get_airports()->search( icao );
+ station_elevation_ft = a.elevation;
+
+ // fetch current metar data
+ try {
+ string host = proxy_host->getStringValue();
+ string auth = proxy_auth->getStringValue();
+ string port = proxy_port->getStringValue();
+ result.m = new SGMetar( icao, host, port, auth);
+
+ } catch (const sg_io_exception& e) {
+ SG_LOG( SG_GENERAL, SG_WARN, "Error fetching live weather data: "
+ << e.getFormattedMessage().c_str() );
+#if defined(ENABLE_THREADS) && ENABLE_THREADS
+ if (_error_count++ >= 3) {
+ SG_LOG( SG_GENERAL, SG_WARN, "Stop fetching data permanently.");
+ thread->cancel();
+ thread->join();
+ }
+#endif
- _icao = strdup(icao);
+ result.m = NULL;
}
- SGMetar *m = new SGMetar(_icao);
+
+ _dt = 0;
+
+ return result;
+}
+
+
+void
+FGMetarEnvironmentCtrl::update_metar_properties( SGMetar *m )
+{
+ int i;
+ double d, dt;
+ char s[128];
d = m->getMinVisibility().getVisibility_m();
d = (d != SGMetarNaN) ? d : 10000;
SGMetarVisibility *dirvis = m->getDirVisibility();
for (i = 0; i < 8; i++, dirvis++) {
- const char *min = "/environment/metar/visibility[%]/min-m";
- const char *max = "/environment/metar/visibility[%]/max-m";
+ const char *min = "/environment/metar/visibility[%d]/min-m";
+ const char *max = "/environment/metar/visibility[%d]/max-m";
char s[128];
d = dirvis->getVisibility_m();
i = m->getWindDir();
if ( i == -1 ) {
fgSetInt("/environment/metar/base-wind-range-from",
- m->getWindRangeFrom() );
+ m->getWindRangeFrom() );
fgSetInt("/environment/metar/base-wind-range-to",
- m->getWindRangeTo() );
+ m->getWindRangeTo() );
} else {
fgSetInt("/environment/metar/base-wind-range-from", i);
fgSetInt("/environment/metar/base-wind-range-to", i);
fgSetDouble("/environment/metar/dewpoint-degc", dt);
fgSetDouble("/environment/metar/rel-humidity-norm",
m->getRelHumidity() );
- }
+ }
d = (d != SGMetarNaN) ? d : 15.0;
- fgSetDouble("/environment/metar/temperature_degc", d);
+ fgSetDouble("/environment/metar/temperature-degc", d);
d = m->getPressure_inHg();
d = (d != SGMetarNaN) ? d : 30.0;
strncat(s, "/elevation-ft", 128);
d = cloud->getAltitude_ft();
d = (d != SGMetarNaN) ? d : -9999;
- fgSetDouble(s, d);
+ fgSetDouble(s, d + station_elevation_ft);
snprintf(s, 128, cl, i);
strncat(s, "/thickness-ft", 128);
strncat(s, "/span-m", 128);
fgSetDouble(s, 40000.0);
}
+
for (; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
snprintf(s, 128, cl, i);
strncat(s, "/coverage", 128);
strncat(s, "/span-m", 128);
fgSetDouble(s, 40000.0);
}
-
- delete m;
}
+
+#if defined(ENABLE_THREADS) && ENABLE_THREADS
+/**
+ *
+ */
void
-FGMetarEnvironmentCtrl::update (double delta_time_sec)
+FGMetarEnvironmentCtrl::MetarThread::run()
{
- double base_wind_speed = _base_wind_speed_node->getDoubleValue();
- double gust_wind_speed = _gust_wind_speed_node->getDoubleValue();
+ pthread_cleanup_push( metar_cleanup_handler, fetcher );
+ while ( true )
+ {
+ set_cancel( SGThread::CANCEL_DISABLE );
- if (gust_wind_speed < base_wind_speed) {
- gust_wind_speed = base_wind_speed;
- _gust_wind_speed_node->setDoubleValue(gust_wind_speed);
- }
+ string icao = fetcher->request_queue.pop();
+ SG_LOG( SG_GENERAL, SG_INFO, "Thread: fetch metar data = " << icao );
+ FGMetarResult result = fetcher->fetch_data( icao );
- if (base_wind_speed == gust_wind_speed) {
- _current_wind_speed_kt = base_wind_speed;
- } else {
- int rn = rand() % 128;
- int sign = (_delta_wind_speed_kt < 0 ? -1 : 1);
- double gust = _current_wind_speed_kt - base_wind_speed;
- double incr = gust / 50;
+ set_cancel( SGThread::CANCEL_DEFERRED );
- if (rn == 0)
- _delta_wind_speed_kt = - _delta_wind_speed_kt;
- else if (rn < 4)
- _delta_wind_speed_kt -= incr * sign;
- else if (rn < 16)
- _delta_wind_speed_kt += incr * sign;
-
- _current_wind_speed_kt += _delta_wind_speed_kt;
-
- if (_current_wind_speed_kt < base_wind_speed) {
- _current_wind_speed_kt = base_wind_speed;
- _delta_wind_speed_kt = 0.01;
- } else if (_current_wind_speed_kt > gust_wind_speed) {
- _current_wind_speed_kt = gust_wind_speed;
- _delta_wind_speed_kt = -0.01;
+ fetcher->result_queue.push( result );
}
- }
-
- if (_environment != 0)
- _environment->set_wind_speed_kt(_current_wind_speed_kt);
+ pthread_cleanup_pop(1);
}
+/**
+ * Ensure mutex is unlocked.
+ */
void
-FGMetarEnvironmentCtrl::do_interpolate (vector<bucket *> &table,
- double altitude_ft,
- FGEnvironment * environment)
+metar_cleanup_handler( void* arg )
{
+ FGMetarEnvironmentCtrl* fetcher = (FGMetarEnvironmentCtrl*) arg;
+ fetcher->mutex.unlock();
}
+#endif // ENABLE_THREADS
-bool
-FGMetarEnvironmentCtrl::bucket::operator< (const bucket &b) const
-{
- return (altitude_ft < b.altitude_ft);
-}
// end of environment_ctrl.cxx
projects / flightgear.git / blobdiff