+void FGEnvironment::_init()
+{
+ elevation_ft = 0;
+ visibility_m = 32000;
+ temperature_sea_level_degc = 15;
+ temperature_degc = 15;
+ dewpoint_sea_level_degc = 5; // guess
+ dewpoint_degc = 5;
+ pressure_sea_level_inhg = 29.92;
+ pressure_inhg = 29.92;
+ turbulence_magnitude_norm = 0;
+ turbulence_rate_hz = 1;
+ wind_from_heading_deg = 0;
+ wind_speed_kt = 0;
+ wind_from_north_fps = 0;
+ wind_from_east_fps = 0;
+ wind_from_down_fps = 0;
+ thermal_lift_fps = 0;
+ ridge_lift_fps= 0;
+ altitude_half_to_sun_m = 1000;
+ altitude_tropo_top_m = 10000;
+#ifdef USING_TABLES
+ _setup_tables();
+#endif
+ _recalc_density();
+ _recalc_relative_humidity();
+ live_update = true;
+}
+