#include <boost/tuple/tuple.hpp>
-#include <plib/sg.h>
-
#include <simgear/constants.h>
#include <simgear/debug/logstream.hxx>
#include <simgear/math/interpolater.hxx>
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
#endif
_recalc_density();
_recalc_relative_humidity();
-
+ live_update = true;
}
FGEnvironment::FGEnvironment()
wind_from_north_fps = env.wind_from_north_fps;
wind_from_east_fps = env.wind_from_east_fps;
wind_from_down_fps = env.wind_from_down_fps;
+ thermal_lift_fps = env.thermal_lift_fps;
+ ridge_lift_fps= env.ridge_lift_fps;
turbulence_magnitude_norm = env.turbulence_magnitude_norm;
turbulence_rate_hz = env.turbulence_rate_hz;
}
void
FGEnvironment::read (const SGPropertyNode * node)
{
+ bool live_update = set_live_update( false );
maybe_copy_value(this, node, "visibility-m",
&FGEnvironment::set_visibility_m);
maybe_copy_value(this, node, "turbulence/rate-hz",
&FGEnvironment::set_turbulence_rate_hz);
+ // calculate derived properties here to avoid duplicate expensive computations
+ _recalc_ne();
+ _recalc_alt_pt();
+ _recalc_alt_dewpoint();
+ _recalc_density();
+ _recalc_relative_humidity();
+
+ set_live_update(live_update);
}
return wind_from_down_fps;
}
+double
+FGEnvironment::get_thermal_lift_fps () const
+{
+ return thermal_lift_fps;
+}
+
+double
+FGEnvironment::get_ridge_lift_fps () const
+{
+ return ridge_lift_fps;
+}
+
double
FGEnvironment::get_turbulence_magnitude_norm () const
{
temperature_sea_level_degc = t;
if (dewpoint_sea_level_degc > t)
dewpoint_sea_level_degc = t;
- _recalc_alt_pt();
- _recalc_density();
+ if( live_update ) {
+ _recalc_alt_pt();
+ _recalc_density();
+ }
}
void
FGEnvironment::set_temperature_degc (double t)
{
temperature_degc = t;
- _recalc_sl_temperature();
- _recalc_sl_pressure();
- _recalc_alt_pt();
- _recalc_density();
- _recalc_relative_humidity();
+ if( live_update ) {
+ _recalc_sl_temperature();
+ _recalc_sl_pressure();
+ _recalc_alt_pt();
+ _recalc_density();
+ _recalc_relative_humidity();
+ }
}
void
dewpoint_sea_level_degc = t;
if (temperature_sea_level_degc < t)
temperature_sea_level_degc = t;
- _recalc_alt_dewpoint();
- _recalc_density();
+ if( live_update ) {
+ _recalc_alt_dewpoint();
+ _recalc_density();
+ }
}
void
FGEnvironment::set_dewpoint_degc (double t)
{
dewpoint_degc = t;
- _recalc_sl_dewpoint();
- _recalc_density();
- _recalc_relative_humidity();
+ if( live_update ) {
+ _recalc_sl_dewpoint();
+ _recalc_density();
+ _recalc_relative_humidity();
+ }
}
void
FGEnvironment::set_pressure_sea_level_inhg (double p)
{
pressure_sea_level_inhg = p;
- _recalc_alt_pt();
- _recalc_density();
+ if( live_update ) {
+ _recalc_alt_pt();
+ _recalc_density();
+ }
}
void
FGEnvironment::set_pressure_inhg (double p)
{
pressure_inhg = p;
- _recalc_sl_pressure();
- _recalc_density();
+ if( live_update ) {
+ _recalc_sl_pressure();
+ _recalc_density();
+ }
}
void
FGEnvironment::set_wind_from_heading_deg (double h)
{
wind_from_heading_deg = h;
- _recalc_ne();
+ if( live_update ) {
+ _recalc_ne();
+ }
}
void
FGEnvironment::set_wind_speed_kt (double s)
{
wind_speed_kt = s;
- _recalc_ne();
+ if( live_update ) {
+ _recalc_ne();
+ }
}
void
FGEnvironment::set_wind_from_north_fps (double n)
{
wind_from_north_fps = n;
- _recalc_hdgspd();
+ if( live_update ) {
+ _recalc_hdgspd();
+ }
}
void
FGEnvironment::set_wind_from_east_fps (double e)
{
wind_from_east_fps = e;
- _recalc_hdgspd();
+ if( live_update ) {
+ _recalc_hdgspd();
+ }
}
void
FGEnvironment::set_wind_from_down_fps (double d)
{
wind_from_down_fps = d;
- _recalc_hdgspd();
+ if( live_update ) {
+ _recalc_hdgspd();
+ }
+}
+
+void
+FGEnvironment::set_thermal_lift_fps (double th)
+{
+ thermal_lift_fps = th;
+ if( live_update ) {
+ _recalc_updraft();
+ }
+}
+
+void
+FGEnvironment::set_ridge_lift_fps (double ri)
+{
+ ridge_lift_fps = ri;
+ if( live_update ) {
+ _recalc_updraft();
+}
}
void
FGEnvironment::set_elevation_ft (double e)
{
elevation_ft = e;
- _recalc_alt_dewpoint();
- _recalc_alt_pt();
- _recalc_density();
- _recalc_relative_humidity();
+ if( live_update ) {
+ _recalc_alt_pt();
+ _recalc_alt_dewpoint();
+ _recalc_density();
+ _recalc_relative_humidity();
+ }
}
void
FGEnvironment::set_altitude_half_to_sun_m (double alt)
{
- altitude_half_to_sun_m = alt;
- _recalc_density_tropo_avg_kgm3();
+ altitude_half_to_sun_m = alt;
+ if( live_update ) {
+ _recalc_density_tropo_avg_kgm3();
+ }
}
void
FGEnvironment::set_altitude_tropo_top_m (double alt)
{
- altitude_tropo_top_m = alt;
- _recalc_density_tropo_avg_kgm3();
+ altitude_tropo_top_m = alt;
+ if( live_update ) {
+ _recalc_density_tropo_avg_kgm3();
+ }
}
sin(wind_from_heading_deg * SGD_DEGREES_TO_RADIANS);
}
+void
+FGEnvironment::_recalc_updraft ()
+{
+ wind_from_down_fps = thermal_lift_fps + ridge_lift_fps ;
+}
+
// Intended to help with the interpretation of METAR data,
// not for random in-flight outside-air temperatures.
void
double t_strato = ISA_def[1].temp - atmodel::freezing;
if (temperature_degc < t_strato) temperature_sea_level_degc = t_strato;
else temperature_sea_level_degc =
- temperature_degc - elevation_ft * ISA_def[0].lapse;
+ temperature_degc + elevation_ft * atmodel::foot * ISA_def[0].lapse;
// Alternative implemenation:
// else temperature_sea_level_inhg = T_layer(0., elevation_ft * foot,
<< " and " << temperature_sea_level_degc
<< " :: " << this
<< " # " << count);
- ///////////////////////////////////raise(SIGUSR1);
}
}
#endif
void
FGEnvironment::_recalc_relative_humidity ()
{
+/*
double vaporpressure = 6.11 * pow(10.0, ((7.5 * dewpoint_degc) / ( 237.7 + dewpoint_degc)));
double sat_vaporpressure = 6.11 * pow(10.0, ((7.5 * temperature_degc)
/ ( 237.7 + temperature_degc)) );
relative_humidity = 100 * vaporpressure / sat_vaporpressure ;
+
+ with a little algebra, this gets the same result and spares two multiplications and one pow()
+*/
+ double a = (7.5 * dewpoint_degc) / ( 237.7 + dewpoint_degc);
+ double b = (7.5 * temperature_degc) / ( 237.7 + temperature_degc);
+ relative_humidity = 100 * pow(10.0,a-b);
}
+bool
+FGEnvironment::set_live_update( bool _live_update )
+{
+ bool b = live_update;
+ live_update = _live_update;
+ return b;
+}
////////////////////////////////////////////////////////////////////////
interpolate (const FGEnvironment * env1, const FGEnvironment * env2,
double fraction, FGEnvironment * result)
{
+ // don't calculate each internal property every time we set a single value
+ // we trigger that at the end of the interpolation process
+ bool live_update = result->set_live_update( false );
+
result->set_visibility_m
(do_interp(env1->get_visibility_m(),
env2->get_visibility_m(),
env2->get_temperature_sea_level_degc(),
fraction));
- result->set_dewpoint_degc
+ result->set_dewpoint_sea_level_degc
(do_interp(env1->get_dewpoint_sea_level_degc(),
env2->get_dewpoint_sea_level_degc(),
fraction));
(do_interp(env1->get_turbulence_rate_hz(),
env2->get_turbulence_rate_hz(),
fraction));
+
+ // calculate derived properties here to avoid duplicate expensive computations
+ result->_recalc_ne();
+ result->_recalc_alt_pt();
+ result->_recalc_alt_dewpoint();
+ result->_recalc_density();
+ result->_recalc_relative_humidity();
+
+ result->set_live_update(live_update);
}
// end of environment.cxx
projects / flightgear.git / blobdiff