1 // radiostack.cxx -- class to manage an instance of the radio stack
3 // Written by Curtis Olson, started April 2000.
5 // Copyright (C) 2000 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 #include <simgear/math/sg_random.h>
26 #include <Aircraft/aircraft.hxx>
27 #include <Main/bfi.hxx>
28 #include <Navaids/ilslist.hxx>
29 #include <Navaids/navlist.hxx>
30 #include <Time/event.hxx>
32 #include "radiostack.hxx"
34 static int nav1_play_count = 0;
35 static int nav2_play_count = 0;
36 static int adf_play_count = 0;
37 static time_t nav1_last_time = 0;
38 static time_t nav2_last_time = 0;
39 static time_t adf_last_time = 0;
42 FGRadioStack *current_radiostack;
46 * Boy, this is ugly! Make the VOR range vary by altitude difference.
48 static double kludgeRange ( double stationElev, double aircraftElev,
51 // Assume that the nominal range (usually
52 // 50nm) applies at a 5,000 ft difference.
54 double factor = ((aircraftElev*METER_TO_FEET) - stationElev) / 5000.0;
55 double range = fabs(nominalRange * factor);
57 // Clamp the range to keep it sane; for
58 // now, never less than 25% or more than
59 // 500% of nominal range.
60 if (range < nominalRange/4.0) {
61 range = nominalRange/4.0;
62 } else if (range > nominalRange*5.0) {
63 range = nominalRange*5.0;
70 // periodic radio station search wrapper
71 static void fgRadioSearch( void ) {
72 current_radiostack->search();
76 FGRadioStack::FGRadioStack() {
82 longitudeVal = fgGetValue("/position/longitude");
83 latitudeVal = fgGetValue("/position/latitude");
84 altitudeVal = fgGetValue("/position/altitude");
89 FGRadioStack::~FGRadioStack()
91 unbind(); // FIXME: should be called externally
103 FGPath path( globals->get_fg_root() );
105 term.append( "Navaids/range.term" );
107 low.append( "Navaids/range.low" );
109 high.append( "Navaids/range.high" );
111 term_tbl = new SGInterpTable( term.str() );
112 low_tbl = new SGInterpTable( low.str() );
113 high_tbl = new SGInterpTable( high.str() );
115 // Search radio database once per second
116 global_events.Register( "fgRadioSearch()", fgRadioSearch,
117 fgEVENT::FG_EVENT_READY, 1000);
121 FGRadioStack::bind ()
124 fgTie("/radios/nav1/frequencies/selected", this,
125 &FGRadioStack::get_nav1_freq, &FGRadioStack::set_nav1_freq);
126 fgTie("/radios/nav1/frequencies/standby", this,
127 &FGRadioStack::get_nav1_alt_freq, &FGRadioStack::set_nav1_alt_freq);
128 fgTie("/radios/nav1/radials/selected", this,
129 &FGRadioStack::get_nav1_sel_radial,
130 &FGRadioStack::set_nav1_sel_radial);
131 fgTie("/radios/nav1/on", this,
132 &FGRadioStack::get_nav1_on_btn,
133 &FGRadioStack::set_nav1_on_btn);
134 fgTie("/radios/nav1/ident", this,
135 &FGRadioStack::get_nav1_ident_btn,
136 &FGRadioStack::set_nav1_ident_btn);
139 fgTie("/radios/nav1/radials/actual", this, &FGRadioStack::get_nav1_radial);
140 fgTie("/radios/nav1/to-flag", this, &FGRadioStack::get_nav1_to_flag);
141 fgTie("/radios/nav1/from-flag", this, &FGRadioStack::get_nav1_from_flag);
142 fgTie("/radios/nav1/in-range", this, &FGRadioStack::get_nav1_inrange);
143 fgTie("/radios/nav1/dme/distance", this, &FGRadioStack::get_nav1_dme_dist);
144 fgTie("/radios/nav1/dme/in-range", this,
145 &FGRadioStack::get_nav1_dme_inrange);
146 fgTie("/radios/nav1/heading-needle-deflection", this,
147 &FGRadioStack::get_nav1_heading_needle_deflection);
148 fgTie("/radios/nav1/gs-needle-deflection", this,
149 &FGRadioStack::get_nav1_gs_needle_deflection);
152 fgTie("/radios/nav2/frequencies/selected", this,
153 &FGRadioStack::get_nav2_freq, &FGRadioStack::set_nav2_freq);
154 fgTie("/radios/nav2/frequencies/standby", this,
155 &FGRadioStack::get_nav2_alt_freq, &FGRadioStack::set_nav2_alt_freq);
156 fgTie("/radios/nav2/radials/selected", this,
157 &FGRadioStack::get_nav2_sel_radial,
158 &FGRadioStack::set_nav2_sel_radial);
159 fgTie("/radios/nav2/on", this,
160 &FGRadioStack::get_nav2_on_btn,
161 &FGRadioStack::set_nav2_on_btn);
162 fgTie("/radios/nav2/ident", this,
163 &FGRadioStack::get_nav2_ident_btn,
164 &FGRadioStack::set_nav2_ident_btn);
167 fgTie("/radios/nav2/radials/actual", this, &FGRadioStack::get_nav2_radial);
168 fgTie("/radios/nav2/to-flag", this, &FGRadioStack::get_nav2_to_flag);
169 fgTie("/radios/nav2/from-flag", this, &FGRadioStack::get_nav2_from_flag);
170 fgTie("/radios/nav2/in-range", this, &FGRadioStack::get_nav2_inrange);
171 fgTie("/radios/nav2/dme/distance", this, &FGRadioStack::get_nav2_dme_dist);
172 fgTie("/radios/nav2/dme/in-range", this,
173 &FGRadioStack::get_nav2_dme_inrange);
174 fgTie("/radios/nav2/heading-needle-deflection", this,
175 &FGRadioStack::get_nav2_heading_needle_deflection);
176 fgTie("/radios/nav2/gs-needle-deflection", this,
177 &FGRadioStack::get_nav2_gs_needle_deflection);
180 fgTie("/radios/adf/frequencies/selected", this,
181 &FGRadioStack::get_adf_freq, &FGRadioStack::set_adf_freq);
182 fgTie("/radios/adf/frequencies/standby", this,
183 &FGRadioStack::get_adf_alt_freq, &FGRadioStack::set_adf_alt_freq);
184 fgTie("/radios/adf/rotation", this,
185 &FGRadioStack::get_adf_rotation, &FGRadioStack::set_adf_rotation);
186 fgTie("/radios/adf/on", this,
187 &FGRadioStack::get_adf_on_btn,
188 &FGRadioStack::set_adf_on_btn);
189 fgTie("/radios/adf/ident", this,
190 &FGRadioStack::get_adf_ident_btn,
191 &FGRadioStack::set_adf_ident_btn);
195 FGRadioStack::unbind ()
197 fgUntie("/radios/nav1/frequencies/selected");
198 fgUntie("/radios/nav1/frequencies/standby");
199 fgUntie("/radios/nav1/radials/actual");
200 fgUntie("/radios/nav1/radials/selected");
201 fgUntie("/radios/nav1/on");
202 fgUntie("/radios/nav1/ident");
203 fgUntie("/radios/nav1/to-flag");
204 fgUntie("/radios/nav1/from-flag");
205 fgUntie("/radios/nav1/in-range");
206 fgUntie("/radios/nav1/dme/distance");
207 fgUntie("/radios/nav1/dme/in-range");
208 fgUntie("/radios/nav1/heading-needle-deflection");
209 fgUntie("/radios/nav1/gs-needle-deflection");
211 fgUntie("/radios/nav2/frequencies/selected");
212 fgUntie("/radios/nav2/frequencies/standby");
213 fgUntie("/radios/nav2/radials/actual");
214 fgUntie("/radios/nav2/radials/selected");
215 fgUntie("/radios/nav2/on");
216 fgUntie("/radios/nav2/ident");
217 fgUntie("/radios/nav2/to-flag");
218 fgUntie("/radios/nav2/from-flag");
219 fgUntie("/radios/nav2/in-range");
220 fgUntie("/radios/nav2/dme/distance");
221 fgUntie("/radios/nav2/dme/in-range");
222 fgUntie("/radios/nav2/heading-needle-deflection");
223 fgUntie("/radios/nav2/gs-needle-deflection");
225 fgUntie("/radios/adf/frequencies/selected");
226 fgUntie("/radios/adf/frequencies/standby");
227 fgUntie("/radios/adf/rotation");
228 fgUntie("/radios/adf/on");
229 fgUntie("/radios/adf/ident");
233 // model standard VOR/DME/TACAN service volumes as per AIM 1-1-8
234 double FGRadioStack::adjustNavRange( double stationElev, double aircraftElev,
235 double nominalRange )
237 // extend out actual usable range to be 1.3x the published safe range
238 const double usability_factor = 1.3;
240 // assumptions we model the standard service volume, plus
241 // ... rather than specifying a cylinder, we model a cone that
242 // contains the cylinder. Then we put an upside down cone on top
243 // to model diminishing returns at too-high altitudes.
245 // altitude difference
246 double alt = ( aircraftElev * METER_TO_FEET - stationElev );
247 // cout << "aircraft elev = " << aircraftElev * METER_TO_FEET
248 // << " station elev = " << stationElev << endl;
250 if ( nominalRange < 25.0 + FG_EPSILON ) {
251 // Standard Terminal Service Volume
252 return term_tbl->interpolate( alt ) * usability_factor;
253 } else if ( nominalRange < 50.0 + FG_EPSILON ) {
254 // Standard Low Altitude Service Volume
255 // table is based on range of 40, scale to actual range
256 return low_tbl->interpolate( alt ) * nominalRange / 40.0
259 // Standard High Altitude Service Volume
260 // table is based on range of 130, scale to actual range
261 return high_tbl->interpolate( alt ) * nominalRange / 130.0
267 // model standard ILS service volumes as per AIM 1-1-9
268 double FGRadioStack::adjustILSRange( double stationElev, double aircraftElev,
269 double offsetDegrees, double distance )
271 // assumptions we model the standard service volume, plus
273 // altitude difference
274 // double alt = ( aircraftElev * METER_TO_FEET - stationElev );
275 double offset = fabs( offsetDegrees );
278 return FG_ILS_DEFAULT_RANGE;
279 } else if ( offset < 35 ) {
280 return 10 + (35 - offset) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
281 } else if ( offset < 45 ) {
282 return (45 - offset);
289 // Update the various nav values based on position and valid tuned in navs
291 FGRadioStack::update()
293 double lon = longitudeVal->getDoubleValue() * DEG_TO_RAD;
294 double lat = latitudeVal->getDoubleValue() * DEG_TO_RAD;
295 double elev = altitudeVal->getDoubleValue() * FEET_TO_METER;
299 Point3D aircraft = sgGeodToCart( Point3D( lon, lat, elev ) );
304 station = Point3D( nav1_x, nav1_y, nav1_z );
305 nav1_loc_dist = aircraft.distance3D( station );
307 if ( nav1_has_dme ) {
308 // staightline distance
309 station = Point3D( nav1_dme_x, nav1_dme_y, nav1_dme_z );
310 nav1_dme_dist = aircraft.distance3D( station );
316 station = Point3D( nav1_gs_x, nav1_gs_y, nav1_gs_z );
317 nav1_gs_dist = aircraft.distance3D( station );
323 geo_inverse_wgs_84( elev, lat * RAD_TO_DEG, lon * RAD_TO_DEG,
324 nav1_loclat, nav1_loclon,
326 // cout << "az1 = " << az1 << " magvar = " << nav1_magvar << endl;
327 nav1_heading = az1 - nav1_magvar;
328 // cout << " heading = " << nav1_heading
329 // << " dist = " << nav1_dist << endl;
332 double offset = nav1_heading - nav1_radial;
333 while ( offset < -180.0 ) { offset += 360.0; }
334 while ( offset > 180.0 ) { offset -= 360.0; }
335 // cout << "ils offset = " << offset << endl;
336 nav1_effective_range = adjustILSRange(nav1_elev, elev, offset,
337 nav1_loc_dist * METER_TO_NM );
339 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
341 // cout << "nav1 range = " << nav1_effective_range
342 // << " (" << nav1_range << ")" << endl;
344 if ( nav1_loc_dist < nav1_effective_range * NM_TO_METER ) {
346 } else if ( nav1_loc_dist < 2 * nav1_effective_range * NM_TO_METER ) {
347 nav1_inrange = sg_random() <
348 ( 2 * nav1_effective_range * NM_TO_METER - nav1_loc_dist ) /
349 (nav1_effective_range * NM_TO_METER);
351 nav1_inrange = false;
355 nav1_radial = nav1_sel_radial;
358 nav1_inrange = false;
360 // cout << "not picking up vor. :-(" << endl;
363 if ( nav1_valid && nav1_inrange ) {
364 // play station ident via audio system if on + ident,
365 // otherwise turn it off
366 if ( nav1_on_btn && nav1_ident_btn ) {
367 if ( nav1_last_time <
368 globals->get_time_params()->get_cur_time() - 30 ) {
369 nav1_last_time = globals->get_time_params()->get_cur_time();
372 if ( nav1_play_count < 4 ) {
374 if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") ) {
375 globals->get_soundmgr()->play_once( "nav1-vor-ident" );
378 } else if ( nav1_play_count < 5 && nav1_has_dme ) {
380 if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") &&
381 !globals->get_soundmgr()->is_playing("nav1-dme-ident") ) {
382 globals->get_soundmgr()->play_once( "nav1-dme-ident" );
387 globals->get_soundmgr()->stop( "nav1-vor-ident" );
388 globals->get_soundmgr()->stop( "nav1-dme-ident" );
393 station = Point3D( nav2_x, nav2_y, nav2_z );
394 nav2_loc_dist = aircraft.distance3D( station );
396 if ( nav2_has_dme ) {
397 // staightline distance
398 station = Point3D( nav2_dme_x, nav2_dme_y, nav2_dme_z );
399 nav2_dme_dist = aircraft.distance3D( station );
405 station = Point3D( nav2_gs_x, nav2_gs_y, nav2_gs_z );
406 nav2_gs_dist = aircraft.distance3D( station );
412 geo_inverse_wgs_84( elev, lat * RAD_TO_DEG, lon * RAD_TO_DEG,
413 nav2_loclat, nav2_loclon,
415 nav2_heading = az1 - nav2_magvar;
416 // cout << " heading = " << nav2_heading
417 // << " dist = " << nav2_dist << endl;
420 double offset = nav2_heading - nav2_radial;
421 while ( offset < -180.0 ) { offset += 360.0; }
422 while ( offset > 180.0 ) { offset -= 360.0; }
423 // cout << "ils offset = " << offset << endl;
424 nav2_effective_range = adjustILSRange(nav2_elev, elev, offset,
425 nav2_loc_dist * METER_TO_NM );
427 nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
429 // cout << "nav2 range = " << nav2_effective_range
430 // << " (" << nav2_range << ")" << endl;
432 if ( nav2_loc_dist < nav2_effective_range * NM_TO_METER ) {
434 } else if ( nav2_loc_dist < 2 * nav2_effective_range * NM_TO_METER ) {
435 nav2_inrange = sg_random() <
436 ( 2 * nav2_effective_range * NM_TO_METER - nav2_loc_dist ) /
437 (nav2_effective_range * NM_TO_METER);
439 nav2_inrange = false;
443 nav2_radial = nav2_sel_radial;
446 nav2_inrange = false;
448 // cout << "not picking up vor. :-(" << endl;
451 if ( nav2_valid && nav2_inrange ) {
452 // play station ident via audio system if on + ident,
453 // otherwise turn it off
454 if ( nav2_on_btn && nav2_ident_btn ) {
455 if ( nav2_last_time <
456 globals->get_time_params()->get_cur_time() - 30 ) {
457 nav2_last_time = globals->get_time_params()->get_cur_time();
460 if ( nav2_play_count < 4 ) {
462 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") ) {
463 globals->get_soundmgr()->play_once( "nav2-vor-ident" );
466 } else if ( nav2_play_count < 5 && nav2_has_dme ) {
468 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") &&
469 !globals->get_soundmgr()->is_playing("nav2-dme-ident") ) {
470 globals->get_soundmgr()->play_once( "nav2-dme-ident" );
475 globals->get_soundmgr()->stop( "nav2-vor-ident" );
476 globals->get_soundmgr()->stop( "nav2-dme-ident" );
482 // staightline distance
483 station = Point3D( adf_x, adf_y, adf_z );
484 adf_dist = aircraft.distance3D( station );
487 geo_inverse_wgs_84( elev, lat * RAD_TO_DEG, lon * RAD_TO_DEG,
491 // cout << " heading = " << nav2_heading
492 // << " dist = " << nav2_dist << endl;
494 adf_effective_range = kludgeRange(adf_elev, elev, adf_range);
495 if ( adf_dist < adf_effective_range * NM_TO_METER ) {
497 } else if ( adf_dist < 2 * adf_effective_range * NM_TO_METER ) {
498 adf_inrange = sg_random() <
499 ( 2 * adf_effective_range * NM_TO_METER - adf_dist ) /
500 (adf_effective_range * NM_TO_METER);
508 if ( adf_valid && adf_inrange ) {
509 // play station ident via audio system if on + ident,
510 // otherwise turn it off
511 if ( adf_on_btn && adf_ident_btn ) {
513 globals->get_time_params()->get_cur_time() - 30 ) {
514 adf_last_time = globals->get_time_params()->get_cur_time();
517 if ( adf_play_count < 4 ) {
519 if ( !globals->get_soundmgr()->is_playing("adf-ident") ) {
520 globals->get_soundmgr()->play_once( "adf-ident" );
525 globals->get_soundmgr()->stop( "adf-ident" );
531 // Update current nav/adf radio stations based on current postition
532 void FGRadioStack::search()
534 double lon = longitudeVal->getDoubleValue() * DEG_TO_RAD;
535 double lat = latitudeVal->getDoubleValue() * DEG_TO_RAD;
536 double elev = altitudeVal->getDoubleValue() * FEET_TO_METER;
542 static string last_nav1_ident = "";
543 static string last_nav2_ident = "";
544 static string last_adf_ident = "";
545 static bool last_nav1_vor = false;
546 static bool last_nav2_vor = false;
547 if ( current_ilslist->query( lon, lat, elev, nav1_freq, &ils ) ) {
548 nav1_ident = ils.get_locident();
550 if ( last_nav1_ident != nav1_ident || last_nav1_vor ) {
551 nav1_trans_ident = ils.get_trans_ident();
552 last_nav1_ident = nav1_ident;
553 last_nav1_vor = false;
555 nav1_has_dme = ils.get_has_dme();
556 nav1_has_gs = ils.get_has_gs();
558 nav1_loclon = ils.get_loclon();
559 nav1_loclat = ils.get_loclat();
560 nav1_gslon = ils.get_gslon();
561 nav1_gslat = ils.get_gslat();
562 nav1_dmelon = ils.get_dmelon();
563 nav1_dmelat = ils.get_dmelat();
564 nav1_elev = ils.get_gselev();
566 nav1_range = FG_ILS_DEFAULT_RANGE;
567 nav1_effective_range = nav1_range;
568 nav1_target_gs = ils.get_gsangle();
569 nav1_radial = ils.get_locheading();
570 while ( nav1_radial < 0.0 ) { nav1_radial += 360.0; }
571 while ( nav1_radial > 360.0 ) { nav1_radial -= 360.0; }
572 nav1_x = ils.get_x();
573 nav1_y = ils.get_y();
574 nav1_z = ils.get_z();
575 nav1_gs_x = ils.get_gs_x();
576 nav1_gs_y = ils.get_gs_y();
577 nav1_gs_z = ils.get_gs_z();
578 nav1_dme_x = ils.get_dme_x();
579 nav1_dme_y = ils.get_dme_y();
580 nav1_dme_z = ils.get_dme_z();
582 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
583 globals->get_soundmgr()->remove( "nav1-vor-ident" );
585 FGSimpleSound *sound;
586 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
587 sound->set_volume( 0.3 );
588 globals->get_soundmgr()->add( sound, "nav1-vor-ident" );
590 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
591 globals->get_soundmgr()->remove( "nav1-dme-ident" );
593 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
594 sound->set_volume( 0.3 );
595 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
597 int offset = (int)(sg_random() * 30.0);
598 nav1_play_count = offset / 4;
599 nav1_last_time = globals->get_time_params()->get_cur_time() -
601 // cout << "offset = " << offset << " play_count = "
602 // << nav1_play_count
603 // << " nav1_last_time = " << nav1_last_time
604 // << " current time = "
605 // << globals->get_time_params()->get_cur_time() << endl;
607 // cout << "Found an ils station in range" << endl;
608 // cout << " id = " << ils.get_locident() << endl;
610 } else if ( current_navlist->query( lon, lat, elev, nav1_freq, &nav ) ) {
611 nav1_ident = nav.get_ident();
613 if ( last_nav1_ident != nav1_ident || !last_nav1_vor ) {
614 last_nav1_ident = nav1_ident;
615 last_nav1_vor = true;
616 nav1_trans_ident = nav.get_trans_ident();
618 nav1_has_dme = nav.get_has_dme();
620 nav1_loclon = nav.get_lon();
621 nav1_loclat = nav.get_lat();
622 nav1_elev = nav.get_elev();
623 nav1_magvar = nav.get_magvar();
624 nav1_range = nav.get_range();
625 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
626 nav1_target_gs = 0.0;
627 nav1_radial = nav1_sel_radial;
628 nav1_x = nav1_dme_x = nav.get_x();
629 nav1_y = nav1_dme_y = nav.get_y();
630 nav1_z = nav1_dme_z = nav.get_z();
632 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
633 globals->get_soundmgr()->remove( "nav1-vor-ident" );
635 FGSimpleSound *sound;
636 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
637 sound->set_volume( 0.3 );
638 globals->get_soundmgr()->add( sound, "nav1-vor-ident" );
640 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
641 globals->get_soundmgr()->remove( "nav1-dme-ident" );
643 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
644 sound->set_volume( 0.3 );
645 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
647 int offset = (int)(sg_random() * 30.0);
648 nav1_play_count = offset / 4;
649 nav1_last_time = globals->get_time_params()->get_cur_time() -
651 // cout << "offset = " << offset << " play_count = "
652 // << nav1_play_count << " nav1_last_time = "
653 // << nav1_last_time << " current time = "
654 // << globals->get_time_params()->get_cur_time() << endl;
656 // cout << "Found a vor station in range" << endl;
657 // cout << " id = " << nav.get_ident() << endl;
664 nav1_trans_ident = "";
665 last_nav1_ident = "";
666 globals->get_soundmgr()->remove( "nav1-vor-ident" );
667 globals->get_soundmgr()->remove( "nav1-dme-ident" );
668 // cout << "not picking up vor1. :-(" << endl;
671 if ( current_ilslist->query( lon, lat, elev, nav2_freq, &ils ) ) {
672 nav2_ident = ils.get_locident();
674 if ( last_nav2_ident != nav2_ident || last_nav2_vor ) {
675 last_nav2_ident = nav2_ident;
676 last_nav2_vor = false;
677 nav2_trans_ident = ils.get_trans_ident();
679 nav2_has_dme = ils.get_has_dme();
680 nav2_has_gs = ils.get_has_gs();
682 nav2_loclon = ils.get_loclon();
683 nav2_loclat = ils.get_loclat();
684 nav2_elev = ils.get_gselev();
686 nav2_range = FG_ILS_DEFAULT_RANGE;
687 nav2_effective_range = nav2_range;
688 nav2_target_gs = ils.get_gsangle();
689 nav2_radial = ils.get_locheading();
690 while ( nav2_radial < 0.0 ) { nav2_radial += 360.0; }
691 while ( nav2_radial > 360.0 ) { nav2_radial -= 360.0; }
692 nav2_x = ils.get_x();
693 nav2_y = ils.get_y();
694 nav2_z = ils.get_z();
695 nav2_gs_x = ils.get_gs_x();
696 nav2_gs_y = ils.get_gs_y();
697 nav2_gs_z = ils.get_gs_z();
698 nav2_dme_x = ils.get_dme_x();
699 nav2_dme_y = ils.get_dme_y();
700 nav2_dme_z = ils.get_dme_z();
702 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
703 globals->get_soundmgr()->remove( "nav2-vor-ident" );
705 FGSimpleSound *sound;
706 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
707 sound->set_volume( 0.3 );
708 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
710 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
711 globals->get_soundmgr()->remove( "nav2-dme-ident" );
713 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
714 sound->set_volume( 0.3 );
715 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
717 int offset = (int)(sg_random() * 30.0);
718 nav2_play_count = offset / 4;
719 nav2_last_time = globals->get_time_params()->get_cur_time() -
721 // cout << "offset = " << offset << " play_count = "
722 // << nav2_play_count << " nav2_last_time = "
723 // << nav2_last_time << " current time = "
724 // << globals->get_time_params()->get_cur_time() << endl;
726 // cout << "Found an ils station in range" << endl;
727 // cout << " id = " << ils.get_locident() << endl;
729 } else if ( current_navlist->query( lon, lat, elev, nav2_freq, &nav ) ) {
730 nav2_ident = nav.get_ident();
732 if ( last_nav2_ident != nav2_ident || !last_nav2_vor ) {
733 last_nav2_ident = nav2_ident;
734 last_nav2_vor = true;
735 nav2_trans_ident = nav.get_trans_ident();
737 nav2_has_dme = nav.get_has_dme();
738 nav2_has_dme = false;
739 nav2_loclon = nav.get_lon();
740 nav2_loclat = nav.get_lat();
741 nav2_elev = nav.get_elev();
742 nav2_magvar = nav.get_magvar();
743 nav2_range = nav.get_range();
744 nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
745 nav2_target_gs = 0.0;
746 nav2_radial = nav2_sel_radial;
747 nav2_x = nav2_dme_x = nav.get_x();
748 nav2_y = nav2_dme_y = nav.get_y();
749 nav2_z = nav2_dme_z = nav.get_z();
751 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
752 globals->get_soundmgr()->remove( "nav2-vor-ident" );
754 FGSimpleSound *sound;
755 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
756 sound->set_volume( 0.3 );
757 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
759 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
760 globals->get_soundmgr()->remove( "nav2-dme-ident" );
762 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
763 sound->set_volume( 0.3 );
764 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
766 int offset = (int)(sg_random() * 30.0);
767 nav2_play_count = offset / 4;
768 nav2_last_time = globals->get_time_params()->get_cur_time() -
770 // cout << "offset = " << offset << " play_count = "
771 // << nav2_play_count << " nav2_last_time = "
772 // << nav2_last_time << " current time = "
773 // << globals->get_time_params()->get_cur_time() << endl;
775 // cout << "Found a vor station in range" << endl;
776 // cout << " id = " << nav.get_ident() << endl;
783 nav2_trans_ident = "";
784 last_nav2_ident = "";
785 globals->get_soundmgr()->remove( "nav2-vor-ident" );
786 globals->get_soundmgr()->remove( "nav2-dme-ident" );
787 // cout << "not picking up vor1. :-(" << endl;
791 if ( current_navlist->query( lon, lat, elev, adf_freq, &nav ) ) {
793 snprintf( freq, 10, "%.0f", adf_freq );
795 adf_ident += nav.get_ident();
796 // cout << "adf ident = " << adf_ident << endl;
798 if ( last_adf_ident != adf_ident ) {
799 last_adf_ident = adf_ident;
801 adf_trans_ident = nav.get_trans_ident();
802 adf_lon = nav.get_lon();
803 adf_lat = nav.get_lat();
804 adf_elev = nav.get_elev();
805 adf_range = nav.get_range();
806 adf_effective_range = kludgeRange(adf_elev, elev, adf_range);
811 if ( globals->get_soundmgr()->exists( "adf-ident" ) ) {
812 globals->get_soundmgr()->remove( "adf-ident" );
814 FGSimpleSound *sound;
815 sound = morse.make_ident( adf_trans_ident, LO_FREQUENCY );
816 sound->set_volume( 0.3 );
817 globals->get_soundmgr()->add( sound, "adf-ident" );
819 int offset = (int)(sg_random() * 30.0);
820 adf_play_count = offset / 4;
821 adf_last_time = globals->get_time_params()->get_cur_time() -
823 // cout << "offset = " << offset << " play_count = "
824 // << adf_play_count << " adf_last_time = "
825 // << adf_last_time << " current time = "
826 // << globals->get_time_params()->get_cur_time() << endl;
828 // cout << "Found an adf station in range" << endl;
829 // cout << " id = " << nav.get_ident() << endl;
834 adf_trans_ident = "";
835 globals->get_soundmgr()->remove( "adf-ident" );
837 // cout << "not picking up adf. :-(" << endl;
842 // return the amount of heading needle deflection, returns a value
843 // clamped to the range of ( -10 , 10 )
844 double FGRadioStack::get_nav1_heading_needle_deflection() const {
847 if ( nav1_inrange ) {
848 r = nav1_heading - nav1_radial;
849 // cout << "Radial = " << nav1_radial
850 // << " Bearing = " << nav1_heading << endl;
852 while ( r > 180.0 ) { r -= 360.0;}
853 while ( r < -180.0 ) { r += 360.0;}
854 if ( fabs(r) > 90.0 ) {
855 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
861 // According to Robin Peel, the ILS is 4x more sensitive than a vor
862 if ( nav1_loc ) { r *= 4.0; }
863 if ( r < -10.0 ) { r = -10.0; }
864 if ( r > 10.0 ) { r = 10.0; }
872 // return the amount of heading needle deflection, returns a value
873 // clamped to the range of ( -10 , 10 )
874 double FGRadioStack::get_nav2_heading_needle_deflection() const {
877 if ( nav2_inrange ) {
878 r = nav2_heading - nav2_radial;
879 // cout << "Radial = " << nav2_radial
880 // << " Bearing = " << nav2_heading << endl;
882 while (r> 180.0) r-=360.0;
883 while (r<-180.0) r+=360.0;
884 if ( fabs(r) > 90.0 )
885 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
886 // According to Robin Peel, the ILS is 4x more sensitive than a vor
887 if ( nav2_loc ) r *= 4.0;
888 if ( r < -10.0 ) r = -10.0;
889 if ( r > 10.0 ) r = 10.0;
897 // return the amount of glide slope needle deflection (.i.e. the
898 // number of degrees we are off the glide slope * 5.0
899 double FGRadioStack::get_nav1_gs_needle_deflection() const {
900 if ( nav1_inrange && nav1_has_gs ) {
901 double x = nav1_gs_dist;
902 double y = (FGBFI::getAltitude() - nav1_elev) * FEET_TO_METER;
903 double angle = atan2( y, x ) * RAD_TO_DEG;
904 return (nav1_target_gs - angle) * 5.0;
911 // return the amount of glide slope needle deflection (.i.e. the
912 // number of degrees we are off the glide slope * 5.0
913 double FGRadioStack::get_nav2_gs_needle_deflection() const {
914 if ( nav2_inrange && nav2_has_gs ) {
915 double x = nav2_gs_dist;
916 double y = (FGBFI::getAltitude() - nav2_elev) * FEET_TO_METER;
917 double angle = atan2( y, x ) * RAD_TO_DEG;
918 return (nav2_target_gs - angle) * 5.0;
926 * Return true if the NAV1 TO flag should be active.
929 FGRadioStack::get_nav1_to_flag () const
932 double offset = fabs(nav1_heading - nav1_radial);
936 return (offset <= 90.0 || offset >= 270.0);
944 * Return true if the NAV1 FROM flag should be active.
947 FGRadioStack::get_nav1_from_flag () const
950 double offset = fabs(nav1_heading - nav1_radial);
954 return (offset > 90.0 && offset < 270.0);
962 * Return true if the NAV2 TO flag should be active.
965 FGRadioStack::get_nav2_to_flag () const
968 double offset = fabs(nav2_heading - nav2_radial);
972 return (offset <= 90.0 || offset >= 270.0);
980 * Return true if the NAV2 FROM flag should be active.
983 FGRadioStack::get_nav2_from_flag () const
986 double offset = fabs(nav2_heading - nav2_radial);
990 return (offset > 90.0 && offset < 270.0);