1 // environment.hxx -- routines to model the natural environment.
3 // Written by David Megginson, started February 2002.
5 // Copyright (C) 2002 David Megginson - david@megginson.com
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24 #ifndef _ENVIRONMENT_HXX
25 #define _ENVIRONMENT_HXX
27 #include <simgear/compiler.h>
32 * Model the natural environment.
34 * This class models the natural environment at a specific place and
35 * time. A separate instance is necessary for each location or time.
37 * This class should eventually move to SimGear.
45 FGEnvironment (const FGEnvironment &environment);
46 virtual ~FGEnvironment();
48 virtual void copy (const FGEnvironment &environment);
50 virtual void read (const SGPropertyNode * node);
52 virtual double get_visibility_m () const;
54 virtual double get_temperature_sea_level_degc () const;
55 virtual double get_temperature_degc () const;
56 virtual double get_temperature_degf () const;
57 virtual double get_dewpoint_sea_level_degc () const;
58 virtual double get_dewpoint_degc () const;
59 virtual double get_pressure_sea_level_inhg () const;
60 virtual double get_pressure_inhg () const;
61 virtual double get_density_slugft3 () const;
63 virtual double get_relative_humidity () const;
64 virtual double get_density_tropo_avg_kgm3 () const;
65 virtual double get_altitude_half_to_sun_m () const;
66 virtual double get_altitude_tropo_top_m () const;
68 virtual double get_wind_from_heading_deg () const;
69 virtual double get_wind_speed_kt () const;
70 virtual double get_wind_from_north_fps () const;
71 virtual double get_wind_from_east_fps () const;
72 virtual double get_wind_from_down_fps () const;
74 virtual double get_turbulence_magnitude_norm () const;
75 virtual double get_turbulence_rate_hz () const;
77 virtual void set_visibility_m (double v);
79 virtual void set_temperature_sea_level_degc (double t);
80 virtual void set_temperature_degc (double t);
81 virtual void set_dewpoint_sea_level_degc (double d);
82 virtual void set_dewpoint_degc (double d);
83 virtual void set_pressure_sea_level_inhg (double p);
84 virtual void set_pressure_inhg (double p);
86 virtual void set_wind_from_heading_deg (double h);
87 virtual void set_wind_speed_kt (double s);
88 virtual void set_wind_from_north_fps (double n);
89 virtual void set_wind_from_east_fps (double e);
90 virtual void set_wind_from_down_fps (double d);
92 virtual void set_turbulence_magnitude_norm (double t);
93 virtual void set_turbulence_rate_hz (double t);
95 virtual double get_elevation_ft () const;
96 virtual void set_elevation_ft (double elevation_ft);
97 virtual void set_altitude_half_to_sun_m (double alt);
98 virtual void set_altitude_tropo_top_m (double alt);
102 void _recalc_hdgspd ();
105 void _recalc_sl_temperature ();
106 void _recalc_alt_temperature ();
107 void _recalc_sl_dewpoint ();
108 void _recalc_alt_dewpoint ();
109 void _recalc_sl_pressure ();
110 void _recalc_alt_pressure ();
111 void _recalc_density ();
113 void _recalc_density_tropo_avg_kgm3 ();
114 void _recalc_relative_humidity ();
120 double temperature_sea_level_degc;
121 double temperature_degc;
122 double dewpoint_sea_level_degc;
123 double dewpoint_degc;
124 double pressure_sea_level_inhg;
125 double pressure_inhg;
126 double density_slugft3;
128 double density_tropo_avg_kgm3;
129 double relative_humidity;
130 double altitude_half_to_sun_m;
131 double altitude_tropo_top_m;
133 double turbulence_magnitude_norm;
134 double turbulence_rate_hz;
136 double wind_from_heading_deg;
137 double wind_speed_kt;
139 double wind_from_north_fps;
140 double wind_from_east_fps;
141 double wind_from_down_fps;
145 void interpolate (const FGEnvironment * env1, const FGEnvironment * env2,
146 double fraction, FGEnvironment * result);
148 #endif // _ENVIRONMENT_HXX