environment.hxx

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// environment.hxx -- routines to model the natural environment.
//
// Written by David Megginson, started February 2002.
//
// Copyright (C) 2002  David Megginson - david@megginson.com
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
 
#ifndef _ENVIRONMENT_HXX
#define _ENVIRONMENT_HXX
 
#include <simgear/compiler.h>
 
#include <cmath>
#include <simgear/props/tiedpropertylist.hxx>

class FGEnvironment
{
 
public:
 
  FGEnvironment();
  FGEnvironment (const FGEnvironment &environment);
  virtual ~FGEnvironment();
 
  FGEnvironment & operator = ( const FGEnvironment & other );
 
  virtual void read (const SGPropertyNode * node);
  virtual void Tie( SGPropertyNode_ptr base, bool setArchivable = true );
  virtual void Untie();
  
  virtual double get_visibility_m () const;
 
  virtual double get_temperature_sea_level_degc () const;
  virtual double get_temperature_degc () const;
  virtual double get_temperature_degf () const;
  virtual double get_dewpoint_sea_level_degc () const;
  virtual double get_dewpoint_degc () const;
  virtual double get_pressure_sea_level_inhg () const;
  virtual double get_pressure_inhg () const;
  virtual double get_density_slugft3 () const;
 
  virtual double get_relative_humidity () const;
  virtual double get_density_tropo_avg_kgm3 () const;
  virtual double get_altitude_half_to_sun_m () const;
  virtual double get_altitude_tropo_top_m () const;
 
  virtual double get_wind_from_heading_deg () const;
  virtual double get_wind_speed_kt () const;
  virtual double get_wind_from_north_fps () const;
  virtual double get_wind_from_east_fps () const;
  virtual double get_wind_from_down_fps () const;
 
  virtual double get_turbulence_magnitude_norm () const;
  virtual double get_turbulence_rate_hz () const;
 
  virtual void set_visibility_m (double v);
 
  virtual void set_temperature_sea_level_degc (double t);
  virtual void set_temperature_degc (double t);
  virtual void set_dewpoint_sea_level_degc (double d);
  virtual void set_dewpoint_degc (double d);
  virtual void set_pressure_sea_level_inhg (double p);
  virtual void set_pressure_inhg (double p);
 
  virtual void set_wind_from_heading_deg (double h);
  virtual void set_wind_speed_kt (double s);
  virtual void set_wind_from_north_fps (double n);
  virtual void set_wind_from_east_fps (double e);
  virtual void set_wind_from_down_fps (double d);
 
  virtual void set_turbulence_magnitude_norm (double t);
  virtual void set_turbulence_rate_hz (double t);
 
  virtual double get_elevation_ft () const;
  virtual void set_elevation_ft (double elevation_ft);
  virtual void set_altitude_half_to_sun_m (double alt);
  virtual void set_altitude_tropo_top_m (double alt);
 
  virtual bool set_live_update(bool live_update);
 
  virtual void set_is_isa(bool isa);
  virtual bool get_is_isa() const;
 
  FGEnvironment & interpolate (const FGEnvironment & env2, double fraction, FGEnvironment * result) const;
private:
  virtual void copy (const FGEnvironment &environment);
  void _init();
  void _recalc_hdgspd ();
 
  void _recalc_sl_temperature ();
  void _recalc_sl_dewpoint ();
  void _recalc_sl_pressure ();
 
  void _recalc_density_tropo_avg_kgm3 ();
  void _recalc_ne ();
  void _recalc_alt_dewpoint ();
  void _recalc_density ();
  void _recalc_relative_humidity ();
  void _recalc_alt_pt ();
 
  double elevation_ft;
  double visibility_m;
 
  // Atmosphere
  double temperature_sea_level_degc;
  double temperature_degc;
  double dewpoint_sea_level_degc;
  double dewpoint_degc;
  double pressure_sea_level_inhg;
  double pressure_inhg;
  double density_slugft3;
 
  double density_tropo_avg_kgm3;
  double relative_humidity;
  double altitude_half_to_sun_m;
  double altitude_tropo_top_m;
 
  double turbulence_magnitude_norm;
  double turbulence_rate_hz;
 
  double wind_from_heading_deg;
  double wind_speed_kt;
 
  double wind_from_north_fps;
  double wind_from_east_fps;
  double wind_from_down_fps;
 
  bool     live_update;
  bool is_isa;
  simgear::TiedPropertyList _tiedProperties;
 
};
 
#endif // _ENVIRONMENT_HXX