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., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #ifndef _ENVIRONMENT_HXX
25 #define _ENVIRONMENT_HXX
27 #include <simgear/compiler.h>
29 #include <Main/fgfs.hxx>
31 #ifdef SG_HAVE_STD_INCLUDES
39 * Model the natural environment.
41 * This class models the natural environment at a specific place and
42 * time. A separate instance is necessary for each location or time.
44 * This class should eventually move to SimGear.
52 FGEnvironment (const FGEnvironment &environment);
53 virtual ~FGEnvironment();
55 virtual void copy (const FGEnvironment &environment);
57 virtual void read (const SGPropertyNode * node);
59 virtual double get_visibility_m () const;
61 virtual double get_temperature_sea_level_degc () const;
62 virtual double get_temperature_degc () const;
63 virtual double get_dewpoint_sea_level_degc () const;
64 virtual double get_dewpoint_degc () const;
65 virtual double get_pressure_sea_level_inhg () const;
66 virtual double get_pressure_inhg () const;
67 virtual double get_density_slugft3 () const;
69 virtual double get_wind_from_heading_deg () const;
70 virtual double get_wind_speed_kt () const;
71 virtual double get_wind_from_north_fps () const;
72 virtual double get_wind_from_east_fps () const;
73 virtual double get_wind_from_down_fps () const;
75 virtual double get_turbulence_norm () 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_norm (double t);
94 virtual double get_elevation_ft () const;
95 virtual void set_elevation_ft (double elevation_ft);
99 void _recalc_hdgspd ();
102 void _recalc_sl_temperature ();
103 void _recalc_alt_temperature ();
104 void _recalc_sl_dewpoint ();
105 void _recalc_alt_dewpoint ();
106 void _recalc_sl_pressure ();
107 void _recalc_alt_pressure ();
108 void _recalc_density ();
115 double temperature_sea_level_degc;
116 double temperature_degc;
117 double dewpoint_sea_level_degc;
118 double dewpoint_degc;
119 double pressure_sea_level_inhg;
120 double pressure_inhg;
121 double density_slugft3;
123 double turbulence_norm;
125 double wind_from_heading_deg;
126 double wind_speed_kt;
128 double wind_from_north_fps;
129 double wind_from_east_fps;
130 double wind_from_down_fps;
134 void interpolate (const FGEnvironment * env1, const FGEnvironment * env2,
135 double fraction, FGEnvironment * result);
137 #endif // _ENVIRONMENT_HXX