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.
28 #include <stdio.h> // snprintf
30 #include <simgear/compiler.h>
31 #include <simgear/math/sg_random.h>
33 #include <Aircraft/aircraft.hxx>
34 #include <Navaids/ilslist.hxx>
35 #include <Navaids/mkrbeacons.hxx>
36 #include <Navaids/navlist.hxx>
37 #include <Time/FGEventMgr.hxx>
39 #include "radiostack.hxx"
44 static int nav1_play_count = 0;
45 static int nav2_play_count = 0;
46 static time_t nav1_last_time = 0;
47 static time_t nav2_last_time = 0;
50 FGRadioStack *current_radiostack;
54 * Boy, this is ugly! Make the VOR range vary by altitude difference.
56 static double kludgeRange ( double stationElev, double aircraftElev,
59 // Assume that the nominal range (usually
60 // 50nm) applies at a 5,000 ft difference.
62 double factor = ((aircraftElev*SG_METER_TO_FEET) - stationElev) / 5000.0;
63 double range = fabs(nominalRange * factor);
65 // Clamp the range to keep it sane; for
66 // now, never less than 25% or more than
67 // 500% of nominal range.
68 if (range < nominalRange/4.0) {
69 range = nominalRange/4.0;
70 } else if (range > nominalRange*5.0) {
71 range = nominalRange*5.0;
79 FGRadioStack::FGRadioStack() :
80 lon_node(fgGetNode("/position/longitude-deg", true)),
81 lat_node(fgGetNode("/position/latitude-deg", true)),
82 alt_node(fgGetNode("/position/altitude-ft", true)),
107 SGPath path( globals->get_fg_root() );
109 term.append( "Navaids/range.term" );
111 low.append( "Navaids/range.low" );
113 high.append( "Navaids/range.high" );
115 term_tbl = new SGInterpTable( term.str() );
116 low_tbl = new SGInterpTable( low.str() );
117 high_tbl = new SGInterpTable( high.str() );
118 dme_last_time.stamp();
123 FGRadioStack::~FGRadioStack()
127 unbind(); // FIXME: should be called externally
136 FGRadioStack::init ()
149 update(0); // FIXME: use dt
153 // Search radio database once per second
154 global_events.Register( "fgRadioSearch()",
155 current_radiostack, &FGRadioStack::search,
160 FGRadioStack::bind ()
163 fgTie("/radios/comm[0]/frequencies/selected-mhz", this,
164 &FGRadioStack::get_comm1_freq, &FGRadioStack::set_comm1_freq);
165 fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz");
166 fgTie("/radios/comm[0]/frequencies/standby-mhz", this,
167 &FGRadioStack::get_comm1_alt_freq, &FGRadioStack::set_comm1_alt_freq);
168 fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz");
169 fgTie("/radios/comm[0]/volume", this,
170 &FGRadioStack::get_comm1_vol_btn,
171 &FGRadioStack::set_comm1_vol_btn);
172 fgSetArchivable("/radios/comm[0]/volume");
173 fgTie("/radios/comm[0]/ident", this,
174 &FGRadioStack::get_comm1_ident_btn,
175 &FGRadioStack::set_comm1_ident_btn);
176 fgSetArchivable("/radios/comm[0]/ident");
178 fgTie("/radios/comm[1]/frequencies/selected-mhz", this,
179 &FGRadioStack::get_comm2_freq, &FGRadioStack::set_comm2_freq);
180 fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz");
181 fgTie("/radios/comm[1]/frequencies/standby-mhz", this,
182 &FGRadioStack::get_comm2_alt_freq, &FGRadioStack::set_comm2_alt_freq);
183 fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz");
184 fgTie("/radios/comm[1]/volume", this,
185 &FGRadioStack::get_comm2_vol_btn,
186 &FGRadioStack::set_comm2_vol_btn);
187 fgSetArchivable("/radios/comm[0]/volume");
188 fgTie("/radios/comm[1]/ident", this,
189 &FGRadioStack::get_comm2_ident_btn,
190 &FGRadioStack::set_comm2_ident_btn);
191 fgSetArchivable("/radios/comm[1]/ident");
193 fgTie("/radios/nav[0]/frequencies/selected-mhz", this,
194 &FGRadioStack::get_nav1_freq, &FGRadioStack::set_nav1_freq);
195 fgSetArchivable("/radios/nav[0]/frequencies/selected-mhz");
196 fgTie("/radios/nav[0]/frequencies/standby-mhz", this,
197 &FGRadioStack::get_nav1_alt_freq, &FGRadioStack::set_nav1_alt_freq);
198 fgSetArchivable("/radios/nav[0]/frequencies/standby-mhz");
199 fgTie("/radios/nav[0]/radials/selected-deg", this,
200 &FGRadioStack::get_nav1_sel_radial,
201 &FGRadioStack::set_nav1_sel_radial);
202 fgSetArchivable("/radios/nav[0]/radials/selected-deg");
203 fgTie("/radios/nav[0]/volume", this,
204 &FGRadioStack::get_nav1_vol_btn,
205 &FGRadioStack::set_nav1_vol_btn);
206 fgSetArchivable("/radios/nav[0]/volume");
207 fgTie("/radios/nav[0]/ident", this,
208 &FGRadioStack::get_nav1_ident_btn,
209 &FGRadioStack::set_nav1_ident_btn);
210 fgSetArchivable("/radios/nav[0]/ident");
213 fgTie("/radios/nav[0]/radials/actual-deg", this,
214 &FGRadioStack::get_nav1_radial);
215 fgTie("/radios/nav[0]/to-flag", this, &FGRadioStack::get_nav1_to_flag);
216 fgTie("/radios/nav[0]/from-flag", this, &FGRadioStack::get_nav1_from_flag);
217 fgTie("/radios/nav[0]/in-range", this, &FGRadioStack::get_nav1_inrange);
218 fgTie("/radios/nav[0]/heading-needle-deflection", this,
219 &FGRadioStack::get_nav1_heading_needle_deflection);
220 fgTie("/radios/nav[0]/gs-needle-deflection", this,
221 &FGRadioStack::get_nav1_gs_needle_deflection);
224 fgTie("/radios/nav[1]/frequencies/selected-mhz", this,
225 &FGRadioStack::get_nav2_freq, &FGRadioStack::set_nav2_freq);
226 fgSetArchivable("/radios/nav[1]/frequencies/selected-mhz");
227 fgTie("/radios/nav[1]/frequencies/standby-mhz", this,
228 &FGRadioStack::get_nav2_alt_freq, &FGRadioStack::set_nav2_alt_freq);
229 fgSetArchivable("/radios/nav[1]/frequencies/standby-mhz");
230 fgTie("/radios/nav[1]/radials/selected-deg", this,
231 &FGRadioStack::get_nav2_sel_radial,
232 &FGRadioStack::set_nav2_sel_radial);
233 fgSetArchivable("/radios/nav[1]/radials/selected-deg");
234 fgTie("/radios/nav[1]/volume", this,
235 &FGRadioStack::get_nav2_vol_btn,
236 &FGRadioStack::set_nav2_vol_btn);
237 fgSetArchivable("/radios/nav[1]/volume");
238 fgTie("/radios/nav[1]/ident", this,
239 &FGRadioStack::get_nav2_ident_btn,
240 &FGRadioStack::set_nav2_ident_btn);
241 fgSetArchivable("/radios/nav[1]/ident");
244 fgTie("/radios/nav[1]/radials/actual-deg", this,
245 &FGRadioStack::get_nav2_radial);
246 fgTie("/radios/nav[1]/to-flag", this, &FGRadioStack::get_nav2_to_flag);
247 fgTie("/radios/nav[1]/from-flag", this, &FGRadioStack::get_nav2_from_flag);
248 fgTie("/radios/nav[1]/in-range", this, &FGRadioStack::get_nav2_inrange);
249 fgTie("/radios/nav[1]/heading-needle-deflection", this,
250 &FGRadioStack::get_nav2_heading_needle_deflection);
251 fgTie("/radios/nav[1]/gs-needle-deflection", this,
252 &FGRadioStack::get_nav2_gs_needle_deflection);
255 fgTie("/radios/dme/frequencies/selected-khz", this,
256 &FGRadioStack::get_dme_freq, &FGRadioStack::set_dme_freq);
259 fgTie("/radios/dme/in-range", this, &FGRadioStack::get_dme_inrange);
260 fgTie("/radios/dme/distance-nm", this, &FGRadioStack::get_dme_dist);
261 fgTie("/radios/dme/speed-kt", this, &FGRadioStack::get_dme_spd);
262 fgTie("/radios/dme/ete-min", this, &FGRadioStack::get_dme_ete);
264 fgTie("/radios/marker-beacon/inner", this,
265 &FGRadioStack::get_inner_blink);
266 fgTie("/radios/marker-beacon/middle", this,
267 &FGRadioStack::get_middle_blink);
268 fgTie("/radios/marker-beacon/outer", this,
269 &FGRadioStack::get_outer_blink);
276 FGRadioStack::unbind ()
278 fgUntie("/radios/comm[0]/frequencies/selected-mhz");
279 fgUntie("/radios/comm[0]/frequencies/standby-mhz");
280 fgUntie("/radios/comm[0]/on");
281 fgUntie("/radios/comm[0]/ident");
283 fgUntie("/radios/comm[1]/frequencies/selected-mhz");
284 fgUntie("/radios/comm[1]/frequencies/standby-mhz");
285 fgUntie("/radios/comm[1]/on");
286 fgUntie("/radios/comm[1]/ident");
288 fgUntie("/radios/nav[0]/frequencies/selected-mhz");
289 fgUntie("/radios/nav[0]/frequencies/standby-mhz");
290 fgUntie("/radios/nav[0]/radials/actual-deg");
291 fgUntie("/radios/nav[0]/radials/selected-deg");
292 fgUntie("/radios/nav[0]/on");
293 fgUntie("/radios/nav[0]/ident");
294 fgUntie("/radios/nav[0]/to-flag");
295 fgUntie("/radios/nav[0]/from-flag");
296 fgUntie("/radios/nav[0]/in-range");
297 fgUntie("/radios/nav[0]/heading-needle-deflection");
298 fgUntie("/radios/nav[0]/gs-needle-deflection");
300 fgUntie("/radios/nav[1]/frequencies/selected-mhz");
301 fgUntie("/radios/nav[1]/frequencies/standby-mhz");
302 fgUntie("/radios/nav[1]/radials/actual-deg");
303 fgUntie("/radios/nav[1]/radials/selected-deg");
304 fgUntie("/radios/nav[1]/on");
305 fgUntie("/radios/nav[1]/ident");
306 fgUntie("/radios/nav[1]/to-flag");
307 fgUntie("/radios/nav[1]/from-flag");
308 fgUntie("/radios/nav[1]/in-range");
309 fgUntie("/radios/nav[1]/heading-needle-deflection");
310 fgUntie("/radios/nav[1]/gs-needle-deflection");
312 fgUntie("/radios/dme/frequencies/selected-khz");
315 fgUntie("/radios/dme/in-range");
316 fgUntie("/radios/dme/distance-nm");
317 fgUntie("/radios/dme/speed-kt");
318 fgUntie("/radios/dme/ete-min");
320 fgUntie("/radios/marker-beacon/inner");
321 fgUntie("/radios/marker-beacon/middle");
322 fgUntie("/radios/marker-beacon/outer");
329 // model standard VOR/DME/TACAN service volumes as per AIM 1-1-8
330 double FGRadioStack::adjustNavRange( double stationElev, double aircraftElev,
331 double nominalRange )
333 // extend out actual usable range to be 1.3x the published safe range
334 const double usability_factor = 1.3;
336 // assumptions we model the standard service volume, plus
337 // ... rather than specifying a cylinder, we model a cone that
338 // contains the cylinder. Then we put an upside down cone on top
339 // to model diminishing returns at too-high altitudes.
341 // altitude difference
342 double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
343 // cout << "aircraft elev = " << aircraftElev * SG_METER_TO_FEET
344 // << " station elev = " << stationElev << endl;
346 if ( nominalRange < 25.0 + SG_EPSILON ) {
347 // Standard Terminal Service Volume
348 return term_tbl->interpolate( alt ) * usability_factor;
349 } else if ( nominalRange < 50.0 + SG_EPSILON ) {
350 // Standard Low Altitude Service Volume
351 // table is based on range of 40, scale to actual range
352 return low_tbl->interpolate( alt ) * nominalRange / 40.0
355 // Standard High Altitude Service Volume
356 // table is based on range of 130, scale to actual range
357 return high_tbl->interpolate( alt ) * nominalRange / 130.0
363 // model standard ILS service volumes as per AIM 1-1-9
364 double FGRadioStack::adjustILSRange( double stationElev, double aircraftElev,
365 double offsetDegrees, double distance )
367 // assumptions we model the standard service volume, plus
369 // altitude difference
370 // double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
371 double offset = fabs( offsetDegrees );
374 return FG_ILS_DEFAULT_RANGE;
375 } else if ( offset < 35 ) {
376 return 10 + (35 - offset) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
377 } else if ( offset < 45 ) {
378 return (45 - offset);
379 } else if ( offset > 170 ) {
380 return FG_ILS_DEFAULT_RANGE;
381 } else if ( offset > 145 ) {
382 return 10 + (offset - 145) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
383 } else if ( offset > 135 ) {
384 return (offset - 135);
391 // Update the various nav values based on position and valid tuned in navs
393 FGRadioStack::update(double dt)
395 double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
396 double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
397 double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
401 Point3D aircraft = sgGeodToCart( Point3D( lon, lat, elev ) );
405 ////////////////////////////////////////////////////////////////////////
407 ////////////////////////////////////////////////////////////////////////
410 station = Point3D( nav1_x, nav1_y, nav1_z );
411 nav1_loc_dist = aircraft.distance3D( station );
414 station = Point3D( nav1_gs_x, nav1_gs_y, nav1_gs_z );
415 nav1_gs_dist = aircraft.distance3D( station );
421 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
422 nav1_loclat, nav1_loclon,
424 // cout << "az1 = " << az1 << " magvar = " << nav1_magvar << endl;
425 nav1_heading = az1 - nav1_magvar;
426 // cout << " heading = " << nav1_heading
427 // << " dist = " << nav1_dist << endl;
430 double offset = nav1_heading - nav1_radial;
431 while ( offset < -180.0 ) { offset += 360.0; }
432 while ( offset > 180.0 ) { offset -= 360.0; }
433 // cout << "ils offset = " << offset << endl;
434 nav1_effective_range = adjustILSRange(nav1_elev, elev, offset,
435 nav1_loc_dist * SG_METER_TO_NM );
437 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
439 // cout << "nav1 range = " << nav1_effective_range
440 // << " (" << nav1_range << ")" << endl;
442 if ( nav1_loc_dist < nav1_effective_range * SG_NM_TO_METER ) {
444 } else if ( nav1_loc_dist < 2 * nav1_effective_range * SG_NM_TO_METER ) {
445 nav1_inrange = sg_random() <
446 ( 2 * nav1_effective_range * SG_NM_TO_METER - nav1_loc_dist ) /
447 (nav1_effective_range * SG_NM_TO_METER);
449 nav1_inrange = false;
453 nav1_radial = nav1_sel_radial;
456 nav1_inrange = false;
457 // cout << "not picking up vor. :-(" << endl;
460 #ifdef ENABLE_AUDIO_SUPPORT
461 if ( nav1_valid && nav1_inrange ) {
462 // play station ident via audio system if on + ident,
463 // otherwise turn it off
464 if ( nav1_vol_btn > 0.1 && nav1_ident_btn ) {
465 FGSimpleSound *sound;
466 sound = globals->get_soundmgr()->find( "nav1-vor-ident" );
467 if ( sound != NULL ) {
468 sound->set_volume( nav1_vol_btn );
470 SG_LOG( SG_COCKPIT, SG_ALERT,
471 "Can't find nav1-vor-ident sound" );
473 sound = globals->get_soundmgr()->find( "nav1-dme-ident" );
474 if ( sound != NULL ) {
475 sound->set_volume( nav1_vol_btn );
477 SG_LOG( SG_COCKPIT, SG_ALERT,
478 "Can't find nav1-dme-ident sound" );
480 // cout << "nav1_last_time = " << nav1_last_time << " ";
481 // cout << "cur_time = " << globals->get_time_params()->get_cur_time();
482 if ( nav1_last_time <
483 globals->get_time_params()->get_cur_time() - 30 ) {
484 nav1_last_time = globals->get_time_params()->get_cur_time();
487 // cout << " nav1_play_count = " << nav1_play_count << endl;
488 // cout << "playing = "
489 // << globals->get_soundmgr()->is_playing("nav1-vor-ident")
491 if ( nav1_play_count < 4 ) {
493 if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") ) {
494 globals->get_soundmgr()->play_once( "nav1-vor-ident" );
497 } else if ( nav1_play_count < 5 && nav1_has_dme ) {
499 if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") &&
500 !globals->get_soundmgr()->is_playing("nav1-dme-ident") ) {
501 globals->get_soundmgr()->play_once( "nav1-dme-ident" );
506 globals->get_soundmgr()->stop( "nav1-vor-ident" );
507 globals->get_soundmgr()->stop( "nav1-dme-ident" );
513 ////////////////////////////////////////////////////////////////////////
515 ////////////////////////////////////////////////////////////////////////
518 station = Point3D( nav2_x, nav2_y, nav2_z );
519 nav2_loc_dist = aircraft.distance3D( station );
522 station = Point3D( nav2_gs_x, nav2_gs_y, nav2_gs_z );
523 nav2_gs_dist = aircraft.distance3D( station );
529 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
530 nav2_loclat, nav2_loclon,
532 nav2_heading = az1 - nav2_magvar;
533 // cout << " heading = " << nav2_heading
534 // << " dist = " << nav2_dist << endl;
537 double offset = nav2_heading - nav2_radial;
538 while ( offset < -180.0 ) { offset += 360.0; }
539 while ( offset > 180.0 ) { offset -= 360.0; }
540 // cout << "ils offset = " << offset << endl;
541 nav2_effective_range = adjustILSRange(nav2_elev, elev, offset,
542 nav2_loc_dist * SG_METER_TO_NM );
544 nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
546 // cout << "nav2 range = " << nav2_effective_range
547 // << " (" << nav2_range << ")" << endl;
549 if ( nav2_loc_dist < nav2_effective_range * SG_NM_TO_METER ) {
551 } else if ( nav2_loc_dist < 2 * nav2_effective_range * SG_NM_TO_METER ) {
552 nav2_inrange = sg_random() <
553 ( 2 * nav2_effective_range * SG_NM_TO_METER - nav2_loc_dist ) /
554 (nav2_effective_range * SG_NM_TO_METER);
556 nav2_inrange = false;
560 nav2_radial = nav2_sel_radial;
563 nav2_inrange = false;
564 // cout << "not picking up vor. :-(" << endl;
567 #ifdef ENABLE_AUDIO_SUPPORT
568 if ( nav2_valid && nav2_inrange ) {
569 // play station ident via audio system if on + ident,
570 // otherwise turn it off
571 if ( nav2_vol_btn > 0.1 && nav2_ident_btn ) {
572 FGSimpleSound *sound;
573 sound = globals->get_soundmgr()->find( "nav2-vor-ident" );
574 if ( sound != NULL ) {
575 sound->set_volume( nav2_vol_btn );
577 SG_LOG( SG_COCKPIT, SG_ALERT,
578 "Can't find nav2-vor-ident sound" );
580 sound = globals->get_soundmgr()->find( "nav2-dme-ident" );
581 if ( sound != NULL ) {
582 sound->set_volume( nav2_vol_btn );
584 SG_LOG( SG_COCKPIT, SG_ALERT,
585 "Can't find nav2-dme-ident sound" );
587 if ( nav2_last_time <
588 globals->get_time_params()->get_cur_time() - 30 ) {
589 nav2_last_time = globals->get_time_params()->get_cur_time();
592 if ( nav2_play_count < 4 ) {
594 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") ) {
595 globals->get_soundmgr()->play_once( "nav2-vor-ident" );
598 } else if ( nav2_play_count < 5 && nav2_has_dme ) {
600 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") &&
601 !globals->get_soundmgr()->is_playing("nav2-dme-ident") ) {
602 globals->get_soundmgr()->play_once( "nav2-dme-ident" );
607 globals->get_soundmgr()->stop( "nav2-vor-ident" );
608 globals->get_soundmgr()->stop( "nav2-dme-ident" );
614 ////////////////////////////////////////////////////////////////////////
616 ////////////////////////////////////////////////////////////////////////
619 station = Point3D( dme_x, dme_y, dme_z );
620 dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM;
621 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
622 if (dme_dist < dme_effective_range * SG_NM_TO_METER) {
624 } else if (dme_dist < 2 * dme_effective_range * SG_NM_TO_METER) {
625 dme_inrange = sg_random() <
626 (2 * dme_effective_range * SG_NM_TO_METER - dme_dist) /
627 (dme_effective_range * SG_NM_TO_METER);
632 SGTimeStamp current_time;
633 station = Point3D( dme_x, dme_y, dme_z );
634 dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM;
635 current_time.stamp();
636 long dMs = (current_time - dme_last_time) / 1000;
637 // Update every second
639 double dDist = dme_dist - dme_prev_dist;
640 dme_spd = fabs((dDist/dMs) * 3600000);
641 // FIXME: the panel should be able to
645 dme_ete = fabs((dme_dist/dme_spd) * 60.0);
646 // FIXME: the panel should be able to
650 dme_prev_dist = dme_dist;
651 dme_last_time.stamp();
660 // marker beacon blinking
661 bool light_on = ( outer_blink || middle_blink || inner_blink );
665 if ( light_on && (current - blink > 400000) ) {
668 } else if ( !light_on && (current - blink > 100000) ) {
673 if ( outer_marker ) {
674 outer_blink = light_on;
679 if ( middle_marker ) {
680 middle_blink = light_on;
682 middle_blink = false;
685 if ( inner_marker ) {
686 inner_blink = light_on;
691 // cout << outer_blink << " " << middle_blink << " " << inner_blink << endl;
694 xponder.update( dt );
698 // Update current nav/adf radio stations based on current postition
699 void FGRadioStack::search()
701 static FGMkrBeacon::fgMkrBeacType last_beacon = FGMkrBeacon::NOBEACON;
703 double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
704 double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
705 double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
707 // FIXME: the panel should handle this
708 // don't worry about overhead for now,
709 // since this is handled only periodically
710 int dme_switch_pos = fgGetInt("/radios/dme/switch-position");
711 if (dme_switch_pos == 0) {
714 } else if (dme_switch_pos == 1) {
715 if (dme_freq != nav1_freq) {
716 dme_freq = nav1_freq;
719 } else if (dme_switch_pos == 3) {
720 if (dme_freq != nav2_freq) {
721 dme_freq = nav2_freq;
729 static string last_nav1_ident = "";
730 static string last_nav2_ident = "";
731 static bool last_nav1_vor = false;
732 static bool last_nav2_vor = false;
734 ////////////////////////////////////////////////////////////////////////
736 ////////////////////////////////////////////////////////////////////////
738 if ( current_ilslist->query( lon, lat, elev, nav1_freq, &ils ) ) {
739 nav1_ident = ils.get_locident();
741 if ( last_nav1_ident != nav1_ident || last_nav1_vor ) {
742 nav1_trans_ident = ils.get_trans_ident();
743 last_nav1_ident = nav1_ident;
744 last_nav1_vor = false;
746 nav1_has_dme = ils.get_has_dme();
747 nav1_has_gs = ils.get_has_gs();
749 nav1_loclon = ils.get_loclon();
750 nav1_loclat = ils.get_loclat();
751 nav1_gslon = ils.get_gslon();
752 nav1_gslat = ils.get_gslat();
753 nav1_elev = ils.get_gselev();
755 nav1_range = FG_ILS_DEFAULT_RANGE;
756 nav1_effective_range = nav1_range;
757 nav1_target_gs = ils.get_gsangle();
758 nav1_radial = ils.get_locheading();
759 while ( nav1_radial < 0.0 ) { nav1_radial += 360.0; }
760 while ( nav1_radial > 360.0 ) { nav1_radial -= 360.0; }
761 nav1_x = ils.get_x();
762 nav1_y = ils.get_y();
763 nav1_z = ils.get_z();
764 nav1_gs_x = ils.get_gs_x();
765 nav1_gs_y = ils.get_gs_y();
766 nav1_gs_z = ils.get_gs_z();
768 #ifdef ENABLE_AUDIO_SUPPORT
769 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
770 globals->get_soundmgr()->remove( "nav1-vor-ident" );
772 FGSimpleSound *sound;
773 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
774 sound->set_volume( 0.3 );
775 globals->get_soundmgr()->add( sound, "nav1-vor-ident" );
777 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
778 globals->get_soundmgr()->remove( "nav1-dme-ident" );
780 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
781 sound->set_volume( 0.3 );
782 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
784 int offset = (int)(sg_random() * 30.0);
785 nav1_play_count = offset / 4;
786 nav1_last_time = globals->get_time_params()->get_cur_time() -
788 // cout << "offset = " << offset << " play_count = "
789 // << nav1_play_count
790 // << " nav1_last_time = " << nav1_last_time
791 // << " current time = "
792 // << globals->get_time_params()->get_cur_time() << endl;
795 // cout << "Found an ils station in range" << endl;
796 // cout << " id = " << ils.get_locident() << endl;
798 } else if ( current_navlist->query( lon, lat, elev, nav1_freq, &nav ) ) {
799 nav1_ident = nav.get_ident();
801 if ( last_nav1_ident != nav1_ident || !last_nav1_vor ) {
802 last_nav1_ident = nav1_ident;
803 last_nav1_vor = true;
804 nav1_trans_ident = nav.get_trans_ident();
806 nav1_has_dme = nav.get_has_dme();
808 nav1_loclon = nav.get_lon();
809 nav1_loclat = nav.get_lat();
810 nav1_elev = nav.get_elev();
811 nav1_magvar = nav.get_magvar();
812 nav1_range = nav.get_range();
813 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
814 nav1_target_gs = 0.0;
815 nav1_radial = nav1_sel_radial;
816 nav1_x = nav.get_x();
817 nav1_y = nav.get_y();
818 nav1_z = nav.get_z();
820 #ifdef ENABLE_AUDIO_SUPPORT
821 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
822 globals->get_soundmgr()->remove( "nav1-vor-ident" );
824 FGSimpleSound *sound;
825 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
826 sound->set_volume( 0.3 );
827 if ( globals->get_soundmgr()->add( sound, "nav1-vor-ident" ) ) {
828 // cout << "Added nav1-vor-ident sound" << endl;
830 // cout << "Failed to add v1-vor-ident sound" << endl;
833 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
834 globals->get_soundmgr()->remove( "nav1-dme-ident" );
836 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
837 sound->set_volume( 0.3 );
838 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
840 int offset = (int)(sg_random() * 30.0);
841 nav1_play_count = offset / 4;
842 nav1_last_time = globals->get_time_params()->get_cur_time() -
844 // cout << "offset = " << offset << " play_count = "
845 // << nav1_play_count << " nav1_last_time = "
846 // << nav1_last_time << " current time = "
847 // << globals->get_time_params()->get_cur_time() << endl;
850 // cout << "Found a vor station in range" << endl;
851 // cout << " id = " << nav.get_ident() << endl;
857 nav1_trans_ident = "";
858 last_nav1_ident = "";
859 #ifdef ENABLE_AUDIO_SUPPORT
860 if ( ! globals->get_soundmgr()->remove( "nav1-vor-ident" ) ) {
861 // cout << "Failed to remove nav1-vor-ident sound" << endl;
863 globals->get_soundmgr()->remove( "nav1-dme-ident" );
865 // cout << "not picking up vor1. :-(" << endl;
869 ////////////////////////////////////////////////////////////////////////
871 ////////////////////////////////////////////////////////////////////////
873 if ( current_ilslist->query( lon, lat, elev, nav2_freq, &ils ) ) {
874 nav2_ident = ils.get_locident();
876 if ( last_nav2_ident != nav2_ident || last_nav2_vor ) {
877 last_nav2_ident = nav2_ident;
878 last_nav2_vor = false;
879 nav2_trans_ident = ils.get_trans_ident();
881 nav2_has_dme = ils.get_has_dme();
882 nav2_has_gs = ils.get_has_gs();
884 nav2_loclon = ils.get_loclon();
885 nav2_loclat = ils.get_loclat();
886 nav2_elev = ils.get_gselev();
888 nav2_range = FG_ILS_DEFAULT_RANGE;
889 nav2_effective_range = nav2_range;
890 nav2_target_gs = ils.get_gsangle();
891 nav2_radial = ils.get_locheading();
892 while ( nav2_radial < 0.0 ) { nav2_radial += 360.0; }
893 while ( nav2_radial > 360.0 ) { nav2_radial -= 360.0; }
894 nav2_x = ils.get_x();
895 nav2_y = ils.get_y();
896 nav2_z = ils.get_z();
897 nav2_gs_x = ils.get_gs_x();
898 nav2_gs_y = ils.get_gs_y();
899 nav2_gs_z = ils.get_gs_z();
901 #ifdef ENABLE_AUDIO_SUPPORT
902 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
903 globals->get_soundmgr()->remove( "nav2-vor-ident" );
905 FGSimpleSound *sound;
906 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
907 sound->set_volume( 0.3 );
908 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
910 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
911 globals->get_soundmgr()->remove( "nav2-dme-ident" );
913 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
914 sound->set_volume( 0.3 );
915 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
917 int offset = (int)(sg_random() * 30.0);
918 nav2_play_count = offset / 4;
919 nav2_last_time = globals->get_time_params()->get_cur_time() -
921 // cout << "offset = " << offset << " play_count = "
922 // << nav2_play_count << " nav2_last_time = "
923 // << nav2_last_time << " current time = "
924 // << globals->get_time_params()->get_cur_time() << endl;
927 // cout << "Found an ils station in range" << endl;
928 // cout << " id = " << ils.get_locident() << endl;
930 } else if ( current_navlist->query( lon, lat, elev, nav2_freq, &nav ) ) {
931 nav2_ident = nav.get_ident();
933 if ( last_nav2_ident != nav2_ident || !last_nav2_vor ) {
934 last_nav2_ident = nav2_ident;
935 last_nav2_vor = true;
936 nav2_trans_ident = nav.get_trans_ident();
938 nav2_has_dme = nav.get_has_dme();
939 nav2_has_dme = false;
940 nav2_loclon = nav.get_lon();
941 nav2_loclat = nav.get_lat();
942 nav2_elev = nav.get_elev();
943 nav2_magvar = nav.get_magvar();
944 nav2_range = nav.get_range();
945 nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
946 nav2_target_gs = 0.0;
947 nav2_radial = nav2_sel_radial;
948 nav2_x = nav.get_x();
949 nav2_y = nav.get_y();
950 nav2_z = nav.get_z();
952 #ifdef ENABLE_AUDIO_SUPPORT
953 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
954 globals->get_soundmgr()->remove( "nav2-vor-ident" );
956 FGSimpleSound *sound;
957 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
958 sound->set_volume( 0.3 );
959 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
961 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
962 globals->get_soundmgr()->remove( "nav2-dme-ident" );
964 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
965 sound->set_volume( 0.3 );
966 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
968 int offset = (int)(sg_random() * 30.0);
969 nav2_play_count = offset / 4;
970 nav2_last_time = globals->get_time_params()->get_cur_time() -
972 // cout << "offset = " << offset << " play_count = "
973 // << nav2_play_count << " nav2_last_time = "
974 // << nav2_last_time << " current time = "
975 // << globals->get_time_params()->get_cur_time() << endl;
978 // cout << "Found a vor station in range" << endl;
979 // cout << " id = " << nav.get_ident() << endl;
985 nav2_trans_ident = "";
986 last_nav2_ident = "";
987 #ifdef ENABLE_AUDIO_SUPPORT
988 globals->get_soundmgr()->remove( "nav2-vor-ident" );
989 globals->get_soundmgr()->remove( "nav2-dme-ident" );
991 // cout << "not picking up vor1. :-(" << endl;
995 ////////////////////////////////////////////////////////////////////////
997 ////////////////////////////////////////////////////////////////////////
999 if ( current_ilslist->query( lon, lat, elev, dme_freq, &ils ) ) {
1000 if (ils.get_has_dme()) {
1002 dme_lon = ils.get_loclon();
1003 dme_lat = ils.get_loclat();
1004 dme_elev = ils.get_gselev();
1005 dme_range = FG_ILS_DEFAULT_RANGE;
1006 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
1007 dme_x = ils.get_dme_x();
1008 dme_y = ils.get_dme_y();
1009 dme_z = ils.get_dme_z();
1011 } else if ( current_navlist->query( lon, lat, elev, dme_freq, &nav ) ) {
1012 if (nav.get_has_dme()) {
1014 dme_lon = nav.get_lon();
1015 dme_lat = nav.get_lat();
1016 dme_elev = nav.get_elev();
1017 dme_range = nav.get_range();
1018 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
1019 dme_x = nav.get_x();
1020 dme_y = nav.get_y();
1021 dme_z = nav.get_z();
1029 ////////////////////////////////////////////////////////////////////////
1031 ////////////////////////////////////////////////////////////////////////
1033 FGMkrBeacon::fgMkrBeacType beacon_type
1034 = current_beacons->query( lon * SGD_RADIANS_TO_DEGREES,
1035 lat * SGD_RADIANS_TO_DEGREES, elev );
1037 outer_marker = middle_marker = inner_marker = false;
1039 if ( beacon_type == FGMkrBeacon::OUTER ) {
1040 outer_marker = true;
1041 // cout << "OUTER MARKER" << endl;
1042 #ifdef ENABLE_AUDIO_SUPPORT
1043 if ( last_beacon != FGMkrBeacon::OUTER ) {
1044 if ( ! globals->get_soundmgr()->exists( "outer-marker" ) ) {
1045 FGSimpleSound *sound = beacon.get_outer();
1046 sound->set_volume( 0.3 );
1047 globals->get_soundmgr()->add( sound, "outer-marker" );
1049 if ( !globals->get_soundmgr()->is_playing("outer-marker") ) {
1050 globals->get_soundmgr()->play_looped( "outer-marker" );
1054 } else if ( beacon_type == FGMkrBeacon::MIDDLE ) {
1055 middle_marker = true;
1056 // cout << "MIDDLE MARKER" << endl;
1057 #ifdef ENABLE_AUDIO_SUPPORT
1058 if ( last_beacon != FGMkrBeacon::MIDDLE ) {
1059 if ( ! globals->get_soundmgr()->exists( "middle-marker" ) ) {
1060 FGSimpleSound *sound = beacon.get_middle();
1061 sound->set_volume( 0.3 );
1062 globals->get_soundmgr()->add( sound, "middle-marker" );
1064 if ( !globals->get_soundmgr()->is_playing("middle-marker") ) {
1065 globals->get_soundmgr()->play_looped( "middle-marker" );
1069 } else if ( beacon_type == FGMkrBeacon::INNER ) {
1070 inner_marker = true;
1071 // cout << "INNER MARKER" << endl;
1072 #ifdef ENABLE_AUDIO_SUPPORT
1073 if ( last_beacon != FGMkrBeacon::INNER ) {
1074 if ( ! globals->get_soundmgr()->exists( "inner-marker" ) ) {
1075 FGSimpleSound *sound = beacon.get_inner();
1076 sound->set_volume( 0.3 );
1077 globals->get_soundmgr()->add( sound, "inner-marker" );
1079 if ( !globals->get_soundmgr()->is_playing("inner-marker") ) {
1080 globals->get_soundmgr()->play_looped( "inner-marker" );
1085 // cout << "no marker" << endl;
1086 #ifdef ENABLE_AUDIO_SUPPORT
1087 globals->get_soundmgr()->stop( "outer-marker" );
1088 globals->get_soundmgr()->stop( "middle-marker" );
1089 globals->get_soundmgr()->stop( "inner-marker" );
1092 last_beacon = beacon_type;
1099 // return the amount of heading needle deflection, returns a value
1100 // clamped to the range of ( -10 , 10 )
1101 double FGRadioStack::get_nav1_heading_needle_deflection() const {
1104 if ( nav1_inrange ) {
1105 r = nav1_heading - nav1_radial;
1106 // cout << "Radial = " << nav1_radial
1107 // << " Bearing = " << nav1_heading << endl;
1109 while ( r > 180.0 ) { r -= 360.0;}
1110 while ( r < -180.0 ) { r += 360.0;}
1111 if ( fabs(r) > 90.0 ) {
1112 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
1118 // According to Robin Peel, the ILS is 4x more sensitive than a vor
1119 if ( nav1_loc ) { r *= 4.0; }
1120 if ( r < -10.0 ) { r = -10.0; }
1121 if ( r > 10.0 ) { r = 10.0; }
1129 // return the amount of heading needle deflection, returns a value
1130 // clamped to the range of ( -10 , 10 )
1131 double FGRadioStack::get_nav2_heading_needle_deflection() const {
1134 if ( nav2_inrange ) {
1135 r = nav2_heading - nav2_radial;
1136 // cout << "Radial = " << nav2_radial
1137 // << " Bearing = " << nav2_heading << endl;
1139 while (r> 180.0) r-=360.0;
1140 while (r<-180.0) r+=360.0;
1141 if ( fabs(r) > 90.0 )
1142 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
1143 // According to Robin Peel, the ILS is 4x more sensitive than a vor
1144 if ( nav2_loc ) r *= 4.0;
1145 if ( r < -10.0 ) r = -10.0;
1146 if ( r > 10.0 ) r = 10.0;
1154 // return the amount of glide slope needle deflection (.i.e. the
1155 // number of degrees we are off the glide slope * 5.0
1156 double FGRadioStack::get_nav1_gs_needle_deflection() const {
1157 if ( nav1_inrange && nav1_has_gs ) {
1158 double x = nav1_gs_dist;
1159 double y = (fgGetDouble("/position/altitude-ft") - nav1_elev)
1161 double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
1162 return (nav1_target_gs - angle) * 5.0;
1169 // return the amount of glide slope needle deflection (.i.e. the
1170 // number of degrees we are off the glide slope * 5.0
1171 double FGRadioStack::get_nav2_gs_needle_deflection() const {
1172 if ( nav2_inrange && nav2_has_gs ) {
1173 double x = nav2_gs_dist;
1174 double y = (fgGetDouble("/position/altitude-ft") - nav2_elev)
1176 double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
1177 return (nav2_target_gs - angle) * 5.0;
1185 * Return true if the NAV1 TO flag should be active.
1188 FGRadioStack::get_nav1_to_flag () const
1191 double offset = fabs(nav1_heading - nav1_radial);
1195 return (offset <= 90.0 || offset >= 270.0);
1203 * Return true if the NAV1 FROM flag should be active.
1206 FGRadioStack::get_nav1_from_flag () const
1209 double offset = fabs(nav1_heading - nav1_radial);
1213 return (offset > 90.0 && offset < 270.0);
1221 * Return true if the NAV2 TO flag should be active.
1224 FGRadioStack::get_nav2_to_flag () const
1227 double offset = fabs(nav2_heading - nav2_radial);
1231 return (offset <= 90.0 || offset >= 270.0);
1239 * Return true if the NAV2 FROM flag should be active.
1242 FGRadioStack::get_nav2_from_flag () const
1245 double offset = fabs(nav2_heading - nav2_radial);
1249 return (offset > 90.0 && offset < 270.0);