1 // navradio.hxx -- class to manage a nav radio instance
3 // Written by Curtis Olson, started April 2000.
5 // Copyright (C) 2000 - 2002 Curtis L. Olson - http://www.flightgear.org/~curt
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 _FG_NAVRADIO_HXX
25 #define _FG_NAVRADIO_HXX
28 #include <Main/fg_props.hxx>
30 #include <simgear/compiler.h>
31 #include <simgear/structure/subsystem_mgr.hxx>
32 #include <simgear/math/interpolater.hxx>
33 #include <simgear/timing/timestamp.hxx>
35 #include <Navaids/navlist.hxx>
36 #include <Sound/morse.hxx>
38 class FGNavRadio : public SGSubsystem
42 SGInterpTable *term_tbl;
43 SGInterpTable *low_tbl;
44 SGInterpTable *high_tbl;
46 SGPropertyNode *lon_node;
47 SGPropertyNode *lat_node;
48 SGPropertyNode *alt_node;
49 SGPropertyNode *bus_power;
50 SGPropertyNode *nav_serviceable;
51 SGPropertyNode *cdi_serviceable, *gs_serviceable, *tofrom_serviceable;
58 int index; // used for property binding
68 string nav_trans_ident;
76 string fmt_freq; // formated frequency
77 string fmt_alt_freq; // formated alternate frequency
78 double nav_heading; // true heading to nav station
79 double nav_radial; // current radial we are on (taking
80 // into consideration the vor station
81 // alignment which likely doesn't
82 // match the magnetic alignment
84 double nav_sel_radial;
85 double nav_target_radial;
86 double nav_target_radial_true;
87 double nav_target_auto_hdg;
96 double nav_elev; // use gs elev if available
102 double nav_gs_dist_signed;
103 double nav_gs_rate_of_climb;
104 SGTimeStamp prev_time;
105 SGTimeStamp curr_time;
107 double nav_effective_range;
108 double nav_target_gs;
118 // internal periodic station search timer
119 double _time_before_search_sec;
121 // model standard VOR/DME/TACAN service volumes as per AIM 1-1-8
122 double adjustNavRange( double stationElev, double aircraftElev,
123 double nominalRange );
125 // model standard ILS service volumes as per AIM 1-1-9
126 double adjustILSRange( double stationElev, double aircraftElev,
127 double offsetDegrees, double distance );
131 FGNavRadio(SGPropertyNode *node);
137 void update (double dt);
139 // Update nav/adf radios based on current postition
142 inline void set_bind_index( int i ) {
144 sprintf( nav_fx_name, "nav%d-vor-ident", index );
145 sprintf( dme_fx_name, "dme%d-vor-ident", index );
150 inline void set_power_btn( bool val ) { power_btn = val; }
151 inline void set_audio_btn( bool val ) { audio_btn = val; }
154 inline void set_nav_freq( double freq ) {
155 nav_freq = freq; need_update = true;
157 inline void set_fmt_freq( const char *freq ) { fmt_freq = freq; }
158 inline void set_nav_alt_freq( double freq ) { nav_alt_freq = freq; }
159 inline void set_fmt_alt_freq( const char *freq ) { fmt_alt_freq = freq; }
160 inline void set_nav_sel_radial( double radial ) {
161 nav_sel_radial = radial; need_update = true;
163 inline void set_nav_vol_btn( double val ) {
164 if ( val < 0.0 ) val = 0.0;
165 if ( val > 1.0 ) val = 1.0;
168 inline void set_nav_ident_btn( bool val ) { nav_ident_btn = val; }
171 inline bool has_power() const {
172 return power_btn && (bus_power->getDoubleValue() > 1.0);
174 inline bool get_power_btn() const { return power_btn; }
175 inline bool get_audio_btn() const { return audio_btn; }
178 inline double get_nav_freq () const { return nav_freq; }
179 inline const char *get_fmt_freq () const { return fmt_freq.c_str(); }
180 inline double get_nav_alt_freq () const { return nav_alt_freq; }
181 inline const char *get_fmt_alt_freq () const {
182 return fmt_alt_freq.c_str();
184 inline double get_nav_sel_radial() const { return nav_sel_radial; }
185 inline double get_nav_target_radial() const { return nav_target_radial; }
186 inline double get_nav_target_radial_true() const {
187 return nav_target_radial_true;
189 inline double get_nav_target_auto_hdg() const {
190 return nav_target_auto_hdg;
193 // Calculated values.
194 inline bool get_nav_inrange() const { return nav_inrange; }
195 bool get_nav_to_flag () const;
196 bool get_nav_from_flag () const;
197 inline bool get_nav_has_dme() const { return nav_has_dme; }
198 inline bool get_nav_dme_inrange () const {
199 return nav_inrange && nav_has_dme;
201 inline bool get_nav_has_gs() const { return nav_has_gs; }
202 inline bool get_nav_loc() const { return nav_loc; }
203 inline double get_nav_loclon() const { return nav_loclon; }
204 inline double get_nav_loclat() const { return nav_loclat; }
205 inline double get_nav_loc_dist() const { return nav_loc_dist; }
206 inline double get_nav_gslon() const { return nav_gslon; }
207 inline double get_nav_gslat() const { return nav_gslat; }
208 inline double get_nav_gs_dist() const { return nav_gs_dist; }
209 inline double get_nav_gs_dist_signed() const { return nav_gs_dist_signed; }
210 inline double get_nav_gs_rate_of_climb() const {
211 return nav_gs_rate_of_climb;
213 inline double get_nav_elev() const { return nav_elev; }
214 double get_nav_heading() const;
215 double get_nav_radial() const;
216 double get_nav_reciprocal_radial() const;
217 inline double get_nav_target_gs() const { return nav_target_gs; }
218 inline double get_nav_twist() const { return nav_twist; }
219 double get_nav_cdi_deflection() const;
220 double get_nav_cdi_xtrack_error() const;
221 double get_nav_gs_deflection() const;
222 inline double get_nav_vol_btn() const { return nav_vol_btn; }
223 inline bool get_nav_ident_btn() const { return nav_ident_btn; }
224 inline const char * get_nav_id() const { return nav_id.c_str(); }
225 inline int get_nav_id_c1() const { return nav_id.c_str()[0]; }
226 inline int get_nav_id_c2() const { return nav_id.c_str()[1]; }
227 inline int get_nav_id_c3() const { return nav_id.c_str()[2]; }
228 inline int get_nav_id_c4() const { return nav_id.c_str()[3]; }
232 #endif // _FG_NAVRADIO_HXX