1 // navcom.hxx -- class to manage a navcom instance
3 // Written by Curtis Olson, started April 2000.
5 // Copyright (C) 2000 - 2002 Curtis L. Olson - curt@flightgear.org
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_NAVCOM_HXX
25 #define _FG_NAVCOM_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/ilslist.hxx>
36 #include <Navaids/navlist.hxx>
37 #include <Sound/morse.hxx>
39 class FGNavCom : public SGSubsystem
43 SGInterpTable *term_tbl;
44 SGInterpTable *low_tbl;
45 SGInterpTable *high_tbl;
47 SGPropertyNode *lon_node;
48 SGPropertyNode *lat_node;
49 SGPropertyNode *alt_node;
50 SGPropertyNode *bus_power;
51 SGPropertyNode *com_serviceable, *nav_serviceable;
52 SGPropertyNode *cdi_serviceable, *gs_serviceable, *tofrom_serviceable;
59 int index; // used for property binding
60 char nav_fx_name[256];
61 char dme_fx_name[256];
80 double comm_effective_range;
83 string nav_trans_ident;
91 double nav_heading; // true heading to nav station
92 double nav_radial; // current radial we are on (taking
93 // into consideration the vor station
94 // alignment which likely doesn't
95 // match the magnetic alignment
97 double nav_sel_radial;
98 double nav_target_radial;
112 double nav_gs_dist_signed;
113 SGTimeStamp prev_time;
114 SGTimeStamp curr_time;
117 double nav_effective_range;
118 double nav_target_gs;
123 // model standard VOR/DME/TACAN service volumes as per AIM 1-1-8
124 double adjustNavRange( double stationElev, double aircraftElev,
125 double nominalRange );
127 // model standard ILS service volumes as per AIM 1-1-9
128 double adjustILSRange( double stationElev, double aircraftElev,
129 double offsetDegrees, double distance );
139 void update (double dt);
141 // Update nav/adf radios based on current postition
144 inline void set_bind_index( int i ) {
146 sprintf( nav_fx_name, "nav%d-vor-ident", index );
147 sprintf( dme_fx_name, "dme%d-vor-ident", index );
151 inline void set_power_btn( bool val ) { power_btn = val; }
152 inline void set_audio_btn( bool val ) { audio_btn = val; }
155 inline void set_comm_freq( double freq ) {
156 comm_freq = freq; need_update = true;
158 inline void set_comm_alt_freq( double freq ) { comm_alt_freq = freq; }
159 inline void set_comm_vol_btn( double val ) {
160 if ( val < 0.0 ) val = 0.0;
161 if ( val > 1.0 ) val = 1.0;
164 inline void set_comm_ident_btn( bool val ) { comm_ident_btn = val; }
167 inline void set_nav_freq( double freq ) {
168 nav_freq = freq; need_update = true;
170 inline void set_nav_alt_freq( double freq ) { nav_alt_freq = freq; }
171 inline void set_nav_sel_radial( double radial ) {
172 nav_sel_radial = radial; need_update = true;
174 inline void set_nav_vol_btn( double val ) {
175 if ( val < 0.0 ) val = 0.0;
176 if ( val > 1.0 ) val = 1.0;
179 inline void set_nav_ident_btn( bool val ) { nav_ident_btn = val; }
182 inline bool has_power() const {
183 return power_btn && (bus_power->getDoubleValue() > 1.0);
185 inline bool get_power_btn() const { return power_btn; }
186 inline bool get_audio_btn() const { return audio_btn; }
189 inline double get_comm_freq () const { return comm_freq; }
190 inline double get_comm_alt_freq () const { return comm_alt_freq; }
193 inline double get_nav_freq () const { return nav_freq; }
194 inline double get_nav_alt_freq () const { return nav_alt_freq; }
195 inline double get_nav_sel_radial() const { return nav_sel_radial; }
196 inline double get_nav_target_radial() const { return nav_target_radial; }
198 // Calculated values.
199 inline bool get_comm_inrange() const { return comm_inrange; }
200 inline double get_comm_vol_btn() const { return comm_vol_btn; }
201 inline bool get_comm_ident_btn() const { return comm_ident_btn; }
203 inline bool get_nav_inrange() const { return nav_inrange; }
204 bool get_nav_to_flag () const;
205 bool get_nav_from_flag () const;
206 inline bool get_nav_has_dme() const { return nav_has_dme; }
207 inline bool get_nav_dme_inrange () const {
208 return nav_inrange && nav_has_dme;
210 inline bool get_nav_has_gs() const { return nav_has_gs; }
211 inline bool get_nav_loc() const { return nav_loc; }
212 inline double get_nav_loclon() const { return nav_loclon; }
213 inline double get_nav_loclat() const { return nav_loclat; }
214 inline double get_nav_loc_dist() const { return nav_loc_dist; }
215 inline double get_nav_gslon() const { return nav_gslon; }
216 inline double get_nav_gslat() const { return nav_gslat; }
217 inline double get_nav_gs_dist() const { return nav_gs_dist; }
218 inline double get_nav_gs_dist_signed() const { return nav_gs_dist_signed; }
219 inline double get_nav_elev() const { return nav_elev; }
220 double get_nav_heading() const;
221 double get_nav_radial() const;
222 double get_nav_reciprocal_radial() const;
223 inline double get_nav_target_gs() const { return nav_target_gs; }
224 inline double get_nav_twist() const { return nav_twist; }
225 double get_nav_cdi_deflection() const;
226 double get_nav_gs_deflection() const;
227 inline double get_nav_vol_btn() const { return nav_vol_btn; }
228 inline bool get_nav_ident_btn() const { return nav_ident_btn; }
229 inline const char * get_nav_id() const { return nav_id.c_str(); }
230 inline int get_nav_id_c1() const { return nav_id.c_str()[0]; }
231 inline int get_nav_id_c2() const { return nav_id.c_str()[1]; }
232 inline int get_nav_id_c3() const { return nav_id.c_str()[2]; }
233 inline int get_nav_id_c4() const { return nav_id.c_str()[3]; }
237 #endif // _FG_NAVCOM_HXX