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()
126 unbind(); // FIXME: should be called externally
135 FGRadioStack::init ()
146 update(0); // FIXME: use dt
149 // Search radio database once per second
150 global_events.Register( "fgRadioSearch()",
151 current_radiostack, &FGRadioStack::search,
156 FGRadioStack::bind ()
159 fgTie("/radios/comm[0]/frequencies/selected-mhz", this,
160 &FGRadioStack::get_comm1_freq, &FGRadioStack::set_comm1_freq);
161 fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz");
162 fgTie("/radios/comm[0]/frequencies/standby-mhz", this,
163 &FGRadioStack::get_comm1_alt_freq, &FGRadioStack::set_comm1_alt_freq);
164 fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz");
165 fgTie("/radios/comm[0]/volume", this,
166 &FGRadioStack::get_comm1_vol_btn,
167 &FGRadioStack::set_comm1_vol_btn);
168 fgSetArchivable("/radios/comm[0]/volume");
169 fgTie("/radios/comm[0]/ident", this,
170 &FGRadioStack::get_comm1_ident_btn,
171 &FGRadioStack::set_comm1_ident_btn);
172 fgSetArchivable("/radios/comm[0]/ident");
174 fgTie("/radios/comm[1]/frequencies/selected-mhz", this,
175 &FGRadioStack::get_comm2_freq, &FGRadioStack::set_comm2_freq);
176 fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz");
177 fgTie("/radios/comm[1]/frequencies/standby-mhz", this,
178 &FGRadioStack::get_comm2_alt_freq, &FGRadioStack::set_comm2_alt_freq);
179 fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz");
180 fgTie("/radios/comm[1]/volume", this,
181 &FGRadioStack::get_comm2_vol_btn,
182 &FGRadioStack::set_comm2_vol_btn);
183 fgSetArchivable("/radios/comm[0]/volume");
184 fgTie("/radios/comm[1]/ident", this,
185 &FGRadioStack::get_comm2_ident_btn,
186 &FGRadioStack::set_comm2_ident_btn);
187 fgSetArchivable("/radios/comm[1]/ident");
189 fgTie("/radios/nav[0]/frequencies/selected-mhz", this,
190 &FGRadioStack::get_nav1_freq, &FGRadioStack::set_nav1_freq);
191 fgSetArchivable("/radios/nav[0]/frequencies/selected-mhz");
192 fgTie("/radios/nav[0]/frequencies/standby-mhz", this,
193 &FGRadioStack::get_nav1_alt_freq, &FGRadioStack::set_nav1_alt_freq);
194 fgSetArchivable("/radios/nav[0]/frequencies/standby-mhz");
195 fgTie("/radios/nav[0]/radials/selected-deg", this,
196 &FGRadioStack::get_nav1_sel_radial,
197 &FGRadioStack::set_nav1_sel_radial);
198 fgSetArchivable("/radios/nav[0]/radials/selected-deg");
199 fgTie("/radios/nav[0]/volume", this,
200 &FGRadioStack::get_nav1_vol_btn,
201 &FGRadioStack::set_nav1_vol_btn);
202 fgSetArchivable("/radios/nav[0]/volume");
203 fgTie("/radios/nav[0]/ident", this,
204 &FGRadioStack::get_nav1_ident_btn,
205 &FGRadioStack::set_nav1_ident_btn);
206 fgSetArchivable("/radios/nav[0]/ident");
209 fgTie("/radios/nav[0]/radials/actual-deg", this,
210 &FGRadioStack::get_nav1_radial);
211 fgTie("/radios/nav[0]/to-flag", this, &FGRadioStack::get_nav1_to_flag);
212 fgTie("/radios/nav[0]/from-flag", this, &FGRadioStack::get_nav1_from_flag);
213 fgTie("/radios/nav[0]/in-range", this, &FGRadioStack::get_nav1_inrange);
214 fgTie("/radios/nav[0]/heading-needle-deflection", this,
215 &FGRadioStack::get_nav1_heading_needle_deflection);
216 fgTie("/radios/nav[0]/gs-needle-deflection", this,
217 &FGRadioStack::get_nav1_gs_needle_deflection);
220 fgTie("/radios/nav[1]/frequencies/selected-mhz", this,
221 &FGRadioStack::get_nav2_freq, &FGRadioStack::set_nav2_freq);
222 fgSetArchivable("/radios/nav[1]/frequencies/selected-mhz");
223 fgTie("/radios/nav[1]/frequencies/standby-mhz", this,
224 &FGRadioStack::get_nav2_alt_freq, &FGRadioStack::set_nav2_alt_freq);
225 fgSetArchivable("/radios/nav[1]/frequencies/standby-mhz");
226 fgTie("/radios/nav[1]/radials/selected-deg", this,
227 &FGRadioStack::get_nav2_sel_radial,
228 &FGRadioStack::set_nav2_sel_radial);
229 fgSetArchivable("/radios/nav[1]/radials/selected-deg");
230 fgTie("/radios/nav[1]/volume", this,
231 &FGRadioStack::get_nav2_vol_btn,
232 &FGRadioStack::set_nav2_vol_btn);
233 fgSetArchivable("/radios/nav[1]/volume");
234 fgTie("/radios/nav[1]/ident", this,
235 &FGRadioStack::get_nav2_ident_btn,
236 &FGRadioStack::set_nav2_ident_btn);
237 fgSetArchivable("/radios/nav[1]/ident");
240 fgTie("/radios/nav[1]/radials/actual-deg", this,
241 &FGRadioStack::get_nav2_radial);
242 fgTie("/radios/nav[1]/to-flag", this, &FGRadioStack::get_nav2_to_flag);
243 fgTie("/radios/nav[1]/from-flag", this, &FGRadioStack::get_nav2_from_flag);
244 fgTie("/radios/nav[1]/in-range", this, &FGRadioStack::get_nav2_inrange);
245 fgTie("/radios/nav[1]/heading-needle-deflection", this,
246 &FGRadioStack::get_nav2_heading_needle_deflection);
247 fgTie("/radios/nav[1]/gs-needle-deflection", this,
248 &FGRadioStack::get_nav2_gs_needle_deflection);
251 fgTie("/radios/dme/frequencies/selected-khz", this,
252 &FGRadioStack::get_dme_freq, &FGRadioStack::set_dme_freq);
255 fgTie("/radios/dme/in-range", this, &FGRadioStack::get_dme_inrange);
256 fgTie("/radios/dme/distance-nm", this, &FGRadioStack::get_dme_dist);
257 fgTie("/radios/dme/speed-kt", this, &FGRadioStack::get_dme_spd);
258 fgTie("/radios/dme/ete-min", this, &FGRadioStack::get_dme_ete);
260 fgTie("/radios/marker-beacon/inner", this,
261 &FGRadioStack::get_inner_blink);
262 fgTie("/radios/marker-beacon/middle", this,
263 &FGRadioStack::get_middle_blink);
264 fgTie("/radios/marker-beacon/outer", this,
265 &FGRadioStack::get_outer_blink);
271 FGRadioStack::unbind ()
273 fgUntie("/radios/comm[0]/frequencies/selected-mhz");
274 fgUntie("/radios/comm[0]/frequencies/standby-mhz");
275 fgUntie("/radios/comm[0]/on");
276 fgUntie("/radios/comm[0]/ident");
278 fgUntie("/radios/comm[1]/frequencies/selected-mhz");
279 fgUntie("/radios/comm[1]/frequencies/standby-mhz");
280 fgUntie("/radios/comm[1]/on");
281 fgUntie("/radios/comm[1]/ident");
283 fgUntie("/radios/nav[0]/frequencies/selected-mhz");
284 fgUntie("/radios/nav[0]/frequencies/standby-mhz");
285 fgUntie("/radios/nav[0]/radials/actual-deg");
286 fgUntie("/radios/nav[0]/radials/selected-deg");
287 fgUntie("/radios/nav[0]/on");
288 fgUntie("/radios/nav[0]/ident");
289 fgUntie("/radios/nav[0]/to-flag");
290 fgUntie("/radios/nav[0]/from-flag");
291 fgUntie("/radios/nav[0]/in-range");
292 fgUntie("/radios/nav[0]/heading-needle-deflection");
293 fgUntie("/radios/nav[0]/gs-needle-deflection");
295 fgUntie("/radios/nav[1]/frequencies/selected-mhz");
296 fgUntie("/radios/nav[1]/frequencies/standby-mhz");
297 fgUntie("/radios/nav[1]/radials/actual-deg");
298 fgUntie("/radios/nav[1]/radials/selected-deg");
299 fgUntie("/radios/nav[1]/on");
300 fgUntie("/radios/nav[1]/ident");
301 fgUntie("/radios/nav[1]/to-flag");
302 fgUntie("/radios/nav[1]/from-flag");
303 fgUntie("/radios/nav[1]/in-range");
304 fgUntie("/radios/nav[1]/heading-needle-deflection");
305 fgUntie("/radios/nav[1]/gs-needle-deflection");
307 fgUntie("/radios/dme/frequencies/selected-khz");
310 fgUntie("/radios/dme/in-range");
311 fgUntie("/radios/dme/distance-nm");
312 fgUntie("/radios/dme/speed-kt");
313 fgUntie("/radios/dme/ete-min");
315 fgUntie("/radios/marker-beacon/inner");
316 fgUntie("/radios/marker-beacon/middle");
317 fgUntie("/radios/marker-beacon/outer");
323 // model standard VOR/DME/TACAN service volumes as per AIM 1-1-8
324 double FGRadioStack::adjustNavRange( double stationElev, double aircraftElev,
325 double nominalRange )
327 // extend out actual usable range to be 1.3x the published safe range
328 const double usability_factor = 1.3;
330 // assumptions we model the standard service volume, plus
331 // ... rather than specifying a cylinder, we model a cone that
332 // contains the cylinder. Then we put an upside down cone on top
333 // to model diminishing returns at too-high altitudes.
335 // altitude difference
336 double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
337 // cout << "aircraft elev = " << aircraftElev * SG_METER_TO_FEET
338 // << " station elev = " << stationElev << endl;
340 if ( nominalRange < 25.0 + SG_EPSILON ) {
341 // Standard Terminal Service Volume
342 return term_tbl->interpolate( alt ) * usability_factor;
343 } else if ( nominalRange < 50.0 + SG_EPSILON ) {
344 // Standard Low Altitude Service Volume
345 // table is based on range of 40, scale to actual range
346 return low_tbl->interpolate( alt ) * nominalRange / 40.0
349 // Standard High Altitude Service Volume
350 // table is based on range of 130, scale to actual range
351 return high_tbl->interpolate( alt ) * nominalRange / 130.0
357 // model standard ILS service volumes as per AIM 1-1-9
358 double FGRadioStack::adjustILSRange( double stationElev, double aircraftElev,
359 double offsetDegrees, double distance )
361 // assumptions we model the standard service volume, plus
363 // altitude difference
364 // double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
365 double offset = fabs( offsetDegrees );
368 return FG_ILS_DEFAULT_RANGE;
369 } else if ( offset < 35 ) {
370 return 10 + (35 - offset) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
371 } else if ( offset < 45 ) {
372 return (45 - offset);
373 } else if ( offset > 170 ) {
374 return FG_ILS_DEFAULT_RANGE;
375 } else if ( offset > 145 ) {
376 return 10 + (offset - 145) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
377 } else if ( offset > 135 ) {
378 return (offset - 135);
385 // Update the various nav values based on position and valid tuned in navs
387 FGRadioStack::update(double dt)
389 double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
390 double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
391 double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
395 Point3D aircraft = sgGeodToCart( Point3D( lon, lat, elev ) );
399 ////////////////////////////////////////////////////////////////////////
401 ////////////////////////////////////////////////////////////////////////
404 station = Point3D( nav1_x, nav1_y, nav1_z );
405 nav1_loc_dist = aircraft.distance3D( station );
408 station = Point3D( nav1_gs_x, nav1_gs_y, nav1_gs_z );
409 nav1_gs_dist = aircraft.distance3D( station );
415 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
416 nav1_loclat, nav1_loclon,
418 // cout << "az1 = " << az1 << " magvar = " << nav1_magvar << endl;
419 nav1_heading = az1 - nav1_magvar;
420 // cout << " heading = " << nav1_heading
421 // << " dist = " << nav1_dist << endl;
424 double offset = nav1_heading - nav1_radial;
425 while ( offset < -180.0 ) { offset += 360.0; }
426 while ( offset > 180.0 ) { offset -= 360.0; }
427 // cout << "ils offset = " << offset << endl;
428 nav1_effective_range = adjustILSRange(nav1_elev, elev, offset,
429 nav1_loc_dist * SG_METER_TO_NM );
431 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
433 // cout << "nav1 range = " << nav1_effective_range
434 // << " (" << nav1_range << ")" << endl;
436 if ( nav1_loc_dist < nav1_effective_range * SG_NM_TO_METER ) {
438 } else if ( nav1_loc_dist < 2 * nav1_effective_range * SG_NM_TO_METER ) {
439 nav1_inrange = sg_random() <
440 ( 2 * nav1_effective_range * SG_NM_TO_METER - nav1_loc_dist ) /
441 (nav1_effective_range * SG_NM_TO_METER);
443 nav1_inrange = false;
447 nav1_radial = nav1_sel_radial;
450 nav1_inrange = false;
451 // cout << "not picking up vor. :-(" << endl;
454 #ifdef ENABLE_AUDIO_SUPPORT
455 if ( nav1_valid && nav1_inrange ) {
456 // play station ident via audio system if on + ident,
457 // otherwise turn it off
458 if ( nav1_vol_btn > 0.1 && nav1_ident_btn ) {
459 FGSimpleSound *sound;
460 sound = globals->get_soundmgr()->find( "nav1-vor-ident" );
461 if ( sound != NULL ) {
462 sound->set_volume( nav1_vol_btn );
464 SG_LOG( SG_COCKPIT, SG_ALERT,
465 "Can't find nav1-vor-ident sound" );
467 sound = globals->get_soundmgr()->find( "nav1-dme-ident" );
468 if ( sound != NULL ) {
469 sound->set_volume( nav1_vol_btn );
471 SG_LOG( SG_COCKPIT, SG_ALERT,
472 "Can't find nav1-dme-ident sound" );
474 // cout << "nav1_last_time = " << nav1_last_time << " ";
475 // cout << "cur_time = " << globals->get_time_params()->get_cur_time();
476 if ( nav1_last_time <
477 globals->get_time_params()->get_cur_time() - 30 ) {
478 nav1_last_time = globals->get_time_params()->get_cur_time();
481 // cout << " nav1_play_count = " << nav1_play_count << endl;
482 // cout << "playing = "
483 // << globals->get_soundmgr()->is_playing("nav1-vor-ident")
485 if ( nav1_play_count < 4 ) {
487 if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") ) {
488 globals->get_soundmgr()->play_once( "nav1-vor-ident" );
491 } else if ( nav1_play_count < 5 && nav1_has_dme ) {
493 if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") &&
494 !globals->get_soundmgr()->is_playing("nav1-dme-ident") ) {
495 globals->get_soundmgr()->play_once( "nav1-dme-ident" );
500 globals->get_soundmgr()->stop( "nav1-vor-ident" );
501 globals->get_soundmgr()->stop( "nav1-dme-ident" );
507 ////////////////////////////////////////////////////////////////////////
509 ////////////////////////////////////////////////////////////////////////
512 station = Point3D( nav2_x, nav2_y, nav2_z );
513 nav2_loc_dist = aircraft.distance3D( station );
516 station = Point3D( nav2_gs_x, nav2_gs_y, nav2_gs_z );
517 nav2_gs_dist = aircraft.distance3D( station );
523 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
524 nav2_loclat, nav2_loclon,
526 nav2_heading = az1 - nav2_magvar;
527 // cout << " heading = " << nav2_heading
528 // << " dist = " << nav2_dist << endl;
531 double offset = nav2_heading - nav2_radial;
532 while ( offset < -180.0 ) { offset += 360.0; }
533 while ( offset > 180.0 ) { offset -= 360.0; }
534 // cout << "ils offset = " << offset << endl;
535 nav2_effective_range = adjustILSRange(nav2_elev, elev, offset,
536 nav2_loc_dist * SG_METER_TO_NM );
538 nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
540 // cout << "nav2 range = " << nav2_effective_range
541 // << " (" << nav2_range << ")" << endl;
543 if ( nav2_loc_dist < nav2_effective_range * SG_NM_TO_METER ) {
545 } else if ( nav2_loc_dist < 2 * nav2_effective_range * SG_NM_TO_METER ) {
546 nav2_inrange = sg_random() <
547 ( 2 * nav2_effective_range * SG_NM_TO_METER - nav2_loc_dist ) /
548 (nav2_effective_range * SG_NM_TO_METER);
550 nav2_inrange = false;
554 nav2_radial = nav2_sel_radial;
557 nav2_inrange = false;
558 // cout << "not picking up vor. :-(" << endl;
561 #ifdef ENABLE_AUDIO_SUPPORT
562 if ( nav2_valid && nav2_inrange ) {
563 // play station ident via audio system if on + ident,
564 // otherwise turn it off
565 if ( nav2_vol_btn > 0.1 && nav2_ident_btn ) {
566 FGSimpleSound *sound;
567 sound = globals->get_soundmgr()->find( "nav2-vor-ident" );
568 if ( sound != NULL ) {
569 sound->set_volume( nav2_vol_btn );
571 SG_LOG( SG_COCKPIT, SG_ALERT,
572 "Can't find nav2-vor-ident sound" );
574 sound = globals->get_soundmgr()->find( "nav2-dme-ident" );
575 if ( sound != NULL ) {
576 sound->set_volume( nav2_vol_btn );
578 SG_LOG( SG_COCKPIT, SG_ALERT,
579 "Can't find nav2-dme-ident sound" );
581 if ( nav2_last_time <
582 globals->get_time_params()->get_cur_time() - 30 ) {
583 nav2_last_time = globals->get_time_params()->get_cur_time();
586 if ( nav2_play_count < 4 ) {
588 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") ) {
589 globals->get_soundmgr()->play_once( "nav2-vor-ident" );
592 } else if ( nav2_play_count < 5 && nav2_has_dme ) {
594 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") &&
595 !globals->get_soundmgr()->is_playing("nav2-dme-ident") ) {
596 globals->get_soundmgr()->play_once( "nav2-dme-ident" );
601 globals->get_soundmgr()->stop( "nav2-vor-ident" );
602 globals->get_soundmgr()->stop( "nav2-dme-ident" );
608 ////////////////////////////////////////////////////////////////////////
610 ////////////////////////////////////////////////////////////////////////
613 station = Point3D( dme_x, dme_y, dme_z );
614 dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM;
615 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
616 if (dme_dist < dme_effective_range * SG_NM_TO_METER) {
618 } else if (dme_dist < 2 * dme_effective_range * SG_NM_TO_METER) {
619 dme_inrange = sg_random() <
620 (2 * dme_effective_range * SG_NM_TO_METER - dme_dist) /
621 (dme_effective_range * SG_NM_TO_METER);
626 SGTimeStamp current_time;
627 station = Point3D( dme_x, dme_y, dme_z );
628 dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM;
629 current_time.stamp();
630 long dMs = (current_time - dme_last_time) / 1000;
631 // Update every second
633 double dDist = dme_dist - dme_prev_dist;
634 dme_spd = fabs((dDist/dMs) * 3600000);
635 // FIXME: the panel should be able to
639 dme_ete = fabs((dme_dist/dme_spd) * 60.0);
640 // FIXME: the panel should be able to
644 dme_prev_dist = dme_dist;
645 dme_last_time.stamp();
654 // marker beacon blinking
655 bool light_on = ( outer_blink || middle_blink || inner_blink );
659 if ( light_on && (current - blink > 400000) ) {
662 } else if ( !light_on && (current - blink > 100000) ) {
667 if ( outer_marker ) {
668 outer_blink = light_on;
673 if ( middle_marker ) {
674 middle_blink = light_on;
676 middle_blink = false;
679 if ( inner_marker ) {
680 inner_blink = light_on;
685 // cout << outer_blink << " " << middle_blink << " " << inner_blink << endl;
691 // Update current nav/adf radio stations based on current postition
692 void FGRadioStack::search()
694 static FGMkrBeacon::fgMkrBeacType last_beacon = FGMkrBeacon::NOBEACON;
696 double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
697 double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
698 double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
700 // FIXME: the panel should handle this
701 // don't worry about overhead for now,
702 // since this is handled only periodically
703 int dme_switch_pos = fgGetInt("/radios/dme/switch-position");
704 if (dme_switch_pos == 0) {
707 } else if (dme_switch_pos == 1) {
708 if (dme_freq != nav1_freq) {
709 dme_freq = nav1_freq;
712 } else if (dme_switch_pos == 3) {
713 if (dme_freq != nav2_freq) {
714 dme_freq = nav2_freq;
722 static string last_nav1_ident = "";
723 static string last_nav2_ident = "";
724 static bool last_nav1_vor = false;
725 static bool last_nav2_vor = false;
727 ////////////////////////////////////////////////////////////////////////
729 ////////////////////////////////////////////////////////////////////////
731 if ( current_ilslist->query( lon, lat, elev, nav1_freq, &ils ) ) {
732 nav1_ident = ils.get_locident();
734 if ( last_nav1_ident != nav1_ident || last_nav1_vor ) {
735 nav1_trans_ident = ils.get_trans_ident();
736 last_nav1_ident = nav1_ident;
737 last_nav1_vor = false;
739 nav1_has_dme = ils.get_has_dme();
740 nav1_has_gs = ils.get_has_gs();
742 nav1_loclon = ils.get_loclon();
743 nav1_loclat = ils.get_loclat();
744 nav1_gslon = ils.get_gslon();
745 nav1_gslat = ils.get_gslat();
746 nav1_elev = ils.get_gselev();
748 nav1_range = FG_ILS_DEFAULT_RANGE;
749 nav1_effective_range = nav1_range;
750 nav1_target_gs = ils.get_gsangle();
751 nav1_radial = ils.get_locheading();
752 while ( nav1_radial < 0.0 ) { nav1_radial += 360.0; }
753 while ( nav1_radial > 360.0 ) { nav1_radial -= 360.0; }
754 nav1_x = ils.get_x();
755 nav1_y = ils.get_y();
756 nav1_z = ils.get_z();
757 nav1_gs_x = ils.get_gs_x();
758 nav1_gs_y = ils.get_gs_y();
759 nav1_gs_z = ils.get_gs_z();
761 #ifdef ENABLE_AUDIO_SUPPORT
762 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
763 globals->get_soundmgr()->remove( "nav1-vor-ident" );
765 FGSimpleSound *sound;
766 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
767 sound->set_volume( 0.3 );
768 globals->get_soundmgr()->add( sound, "nav1-vor-ident" );
770 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
771 globals->get_soundmgr()->remove( "nav1-dme-ident" );
773 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
774 sound->set_volume( 0.3 );
775 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
777 int offset = (int)(sg_random() * 30.0);
778 nav1_play_count = offset / 4;
779 nav1_last_time = globals->get_time_params()->get_cur_time() -
781 // cout << "offset = " << offset << " play_count = "
782 // << nav1_play_count
783 // << " nav1_last_time = " << nav1_last_time
784 // << " current time = "
785 // << globals->get_time_params()->get_cur_time() << endl;
788 // cout << "Found an ils station in range" << endl;
789 // cout << " id = " << ils.get_locident() << endl;
791 } else if ( current_navlist->query( lon, lat, elev, nav1_freq, &nav ) ) {
792 nav1_ident = nav.get_ident();
794 if ( last_nav1_ident != nav1_ident || !last_nav1_vor ) {
795 last_nav1_ident = nav1_ident;
796 last_nav1_vor = true;
797 nav1_trans_ident = nav.get_trans_ident();
799 nav1_has_dme = nav.get_has_dme();
801 nav1_loclon = nav.get_lon();
802 nav1_loclat = nav.get_lat();
803 nav1_elev = nav.get_elev();
804 nav1_magvar = nav.get_magvar();
805 nav1_range = nav.get_range();
806 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
807 nav1_target_gs = 0.0;
808 nav1_radial = nav1_sel_radial;
809 nav1_x = nav.get_x();
810 nav1_y = nav.get_y();
811 nav1_z = nav.get_z();
813 #ifdef ENABLE_AUDIO_SUPPORT
814 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
815 globals->get_soundmgr()->remove( "nav1-vor-ident" );
817 FGSimpleSound *sound;
818 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
819 sound->set_volume( 0.3 );
820 if ( globals->get_soundmgr()->add( sound, "nav1-vor-ident" ) ) {
821 // cout << "Added nav1-vor-ident sound" << endl;
823 // cout << "Failed to add v1-vor-ident sound" << endl;
826 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
827 globals->get_soundmgr()->remove( "nav1-dme-ident" );
829 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
830 sound->set_volume( 0.3 );
831 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
833 int offset = (int)(sg_random() * 30.0);
834 nav1_play_count = offset / 4;
835 nav1_last_time = globals->get_time_params()->get_cur_time() -
837 // cout << "offset = " << offset << " play_count = "
838 // << nav1_play_count << " nav1_last_time = "
839 // << nav1_last_time << " current time = "
840 // << globals->get_time_params()->get_cur_time() << endl;
843 // cout << "Found a vor station in range" << endl;
844 // cout << " id = " << nav.get_ident() << endl;
850 nav1_trans_ident = "";
851 last_nav1_ident = "";
852 #ifdef ENABLE_AUDIO_SUPPORT
853 if ( ! globals->get_soundmgr()->remove( "nav1-vor-ident" ) ) {
854 // cout << "Failed to remove nav1-vor-ident sound" << endl;
856 globals->get_soundmgr()->remove( "nav1-dme-ident" );
858 // cout << "not picking up vor1. :-(" << endl;
862 ////////////////////////////////////////////////////////////////////////
864 ////////////////////////////////////////////////////////////////////////
866 if ( current_ilslist->query( lon, lat, elev, nav2_freq, &ils ) ) {
867 nav2_ident = ils.get_locident();
869 if ( last_nav2_ident != nav2_ident || last_nav2_vor ) {
870 last_nav2_ident = nav2_ident;
871 last_nav2_vor = false;
872 nav2_trans_ident = ils.get_trans_ident();
874 nav2_has_dme = ils.get_has_dme();
875 nav2_has_gs = ils.get_has_gs();
877 nav2_loclon = ils.get_loclon();
878 nav2_loclat = ils.get_loclat();
879 nav2_elev = ils.get_gselev();
881 nav2_range = FG_ILS_DEFAULT_RANGE;
882 nav2_effective_range = nav2_range;
883 nav2_target_gs = ils.get_gsangle();
884 nav2_radial = ils.get_locheading();
885 while ( nav2_radial < 0.0 ) { nav2_radial += 360.0; }
886 while ( nav2_radial > 360.0 ) { nav2_radial -= 360.0; }
887 nav2_x = ils.get_x();
888 nav2_y = ils.get_y();
889 nav2_z = ils.get_z();
890 nav2_gs_x = ils.get_gs_x();
891 nav2_gs_y = ils.get_gs_y();
892 nav2_gs_z = ils.get_gs_z();
894 #ifdef ENABLE_AUDIO_SUPPORT
895 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
896 globals->get_soundmgr()->remove( "nav2-vor-ident" );
898 FGSimpleSound *sound;
899 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
900 sound->set_volume( 0.3 );
901 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
903 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
904 globals->get_soundmgr()->remove( "nav2-dme-ident" );
906 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
907 sound->set_volume( 0.3 );
908 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
910 int offset = (int)(sg_random() * 30.0);
911 nav2_play_count = offset / 4;
912 nav2_last_time = globals->get_time_params()->get_cur_time() -
914 // cout << "offset = " << offset << " play_count = "
915 // << nav2_play_count << " nav2_last_time = "
916 // << nav2_last_time << " current time = "
917 // << globals->get_time_params()->get_cur_time() << endl;
920 // cout << "Found an ils station in range" << endl;
921 // cout << " id = " << ils.get_locident() << endl;
923 } else if ( current_navlist->query( lon, lat, elev, nav2_freq, &nav ) ) {
924 nav2_ident = nav.get_ident();
926 if ( last_nav2_ident != nav2_ident || !last_nav2_vor ) {
927 last_nav2_ident = nav2_ident;
928 last_nav2_vor = true;
929 nav2_trans_ident = nav.get_trans_ident();
931 nav2_has_dme = nav.get_has_dme();
932 nav2_has_dme = false;
933 nav2_loclon = nav.get_lon();
934 nav2_loclat = nav.get_lat();
935 nav2_elev = nav.get_elev();
936 nav2_magvar = nav.get_magvar();
937 nav2_range = nav.get_range();
938 nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
939 nav2_target_gs = 0.0;
940 nav2_radial = nav2_sel_radial;
941 nav2_x = nav.get_x();
942 nav2_y = nav.get_y();
943 nav2_z = nav.get_z();
945 #ifdef ENABLE_AUDIO_SUPPORT
946 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
947 globals->get_soundmgr()->remove( "nav2-vor-ident" );
949 FGSimpleSound *sound;
950 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
951 sound->set_volume( 0.3 );
952 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
954 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
955 globals->get_soundmgr()->remove( "nav2-dme-ident" );
957 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
958 sound->set_volume( 0.3 );
959 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
961 int offset = (int)(sg_random() * 30.0);
962 nav2_play_count = offset / 4;
963 nav2_last_time = globals->get_time_params()->get_cur_time() -
965 // cout << "offset = " << offset << " play_count = "
966 // << nav2_play_count << " nav2_last_time = "
967 // << nav2_last_time << " current time = "
968 // << globals->get_time_params()->get_cur_time() << endl;
971 // cout << "Found a vor station in range" << endl;
972 // cout << " id = " << nav.get_ident() << endl;
978 nav2_trans_ident = "";
979 last_nav2_ident = "";
980 #ifdef ENABLE_AUDIO_SUPPORT
981 globals->get_soundmgr()->remove( "nav2-vor-ident" );
982 globals->get_soundmgr()->remove( "nav2-dme-ident" );
984 // cout << "not picking up vor1. :-(" << endl;
988 ////////////////////////////////////////////////////////////////////////
990 ////////////////////////////////////////////////////////////////////////
992 if ( current_ilslist->query( lon, lat, elev, dme_freq, &ils ) ) {
993 if (ils.get_has_dme()) {
995 dme_lon = ils.get_loclon();
996 dme_lat = ils.get_loclat();
997 dme_elev = ils.get_gselev();
998 dme_range = FG_ILS_DEFAULT_RANGE;
999 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
1000 dme_x = ils.get_dme_x();
1001 dme_y = ils.get_dme_y();
1002 dme_z = ils.get_dme_z();
1004 } else if ( current_navlist->query( lon, lat, elev, dme_freq, &nav ) ) {
1005 if (nav.get_has_dme()) {
1007 dme_lon = nav.get_lon();
1008 dme_lat = nav.get_lat();
1009 dme_elev = nav.get_elev();
1010 dme_range = nav.get_range();
1011 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
1012 dme_x = nav.get_x();
1013 dme_y = nav.get_y();
1014 dme_z = nav.get_z();
1022 ////////////////////////////////////////////////////////////////////////
1024 ////////////////////////////////////////////////////////////////////////
1026 FGMkrBeacon::fgMkrBeacType beacon_type
1027 = current_beacons->query( lon * SGD_RADIANS_TO_DEGREES,
1028 lat * SGD_RADIANS_TO_DEGREES, elev );
1030 outer_marker = middle_marker = inner_marker = false;
1032 if ( beacon_type == FGMkrBeacon::OUTER ) {
1033 outer_marker = true;
1034 // cout << "OUTER MARKER" << endl;
1035 #ifdef ENABLE_AUDIO_SUPPORT
1036 if ( last_beacon != FGMkrBeacon::OUTER ) {
1037 if ( ! globals->get_soundmgr()->exists( "outer-marker" ) ) {
1038 FGSimpleSound *sound = beacon.get_outer();
1039 sound->set_volume( 0.3 );
1040 globals->get_soundmgr()->add( sound, "outer-marker" );
1042 if ( !globals->get_soundmgr()->is_playing("outer-marker") ) {
1043 globals->get_soundmgr()->play_looped( "outer-marker" );
1047 } else if ( beacon_type == FGMkrBeacon::MIDDLE ) {
1048 middle_marker = true;
1049 // cout << "MIDDLE MARKER" << endl;
1050 #ifdef ENABLE_AUDIO_SUPPORT
1051 if ( last_beacon != FGMkrBeacon::MIDDLE ) {
1052 if ( ! globals->get_soundmgr()->exists( "middle-marker" ) ) {
1053 FGSimpleSound *sound = beacon.get_middle();
1054 sound->set_volume( 0.3 );
1055 globals->get_soundmgr()->add( sound, "middle-marker" );
1057 if ( !globals->get_soundmgr()->is_playing("middle-marker") ) {
1058 globals->get_soundmgr()->play_looped( "middle-marker" );
1062 } else if ( beacon_type == FGMkrBeacon::INNER ) {
1063 inner_marker = true;
1064 // cout << "INNER MARKER" << endl;
1065 #ifdef ENABLE_AUDIO_SUPPORT
1066 if ( last_beacon != FGMkrBeacon::INNER ) {
1067 if ( ! globals->get_soundmgr()->exists( "inner-marker" ) ) {
1068 FGSimpleSound *sound = beacon.get_inner();
1069 sound->set_volume( 0.3 );
1070 globals->get_soundmgr()->add( sound, "inner-marker" );
1072 if ( !globals->get_soundmgr()->is_playing("inner-marker") ) {
1073 globals->get_soundmgr()->play_looped( "inner-marker" );
1078 // cout << "no marker" << endl;
1079 #ifdef ENABLE_AUDIO_SUPPORT
1080 globals->get_soundmgr()->stop( "outer-marker" );
1081 globals->get_soundmgr()->stop( "middle-marker" );
1082 globals->get_soundmgr()->stop( "inner-marker" );
1085 last_beacon = beacon_type;
1091 // return the amount of heading needle deflection, returns a value
1092 // clamped to the range of ( -10 , 10 )
1093 double FGRadioStack::get_nav1_heading_needle_deflection() const {
1096 if ( nav1_inrange ) {
1097 r = nav1_heading - nav1_radial;
1098 // cout << "Radial = " << nav1_radial
1099 // << " Bearing = " << nav1_heading << endl;
1101 while ( r > 180.0 ) { r -= 360.0;}
1102 while ( r < -180.0 ) { r += 360.0;}
1103 if ( fabs(r) > 90.0 ) {
1104 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
1110 // According to Robin Peel, the ILS is 4x more sensitive than a vor
1111 if ( nav1_loc ) { r *= 4.0; }
1112 if ( r < -10.0 ) { r = -10.0; }
1113 if ( r > 10.0 ) { r = 10.0; }
1121 // return the amount of heading needle deflection, returns a value
1122 // clamped to the range of ( -10 , 10 )
1123 double FGRadioStack::get_nav2_heading_needle_deflection() const {
1126 if ( nav2_inrange ) {
1127 r = nav2_heading - nav2_radial;
1128 // cout << "Radial = " << nav2_radial
1129 // << " Bearing = " << nav2_heading << endl;
1131 while (r> 180.0) r-=360.0;
1132 while (r<-180.0) r+=360.0;
1133 if ( fabs(r) > 90.0 )
1134 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
1135 // According to Robin Peel, the ILS is 4x more sensitive than a vor
1136 if ( nav2_loc ) r *= 4.0;
1137 if ( r < -10.0 ) r = -10.0;
1138 if ( r > 10.0 ) r = 10.0;
1146 // return the amount of glide slope needle deflection (.i.e. the
1147 // number of degrees we are off the glide slope * 5.0
1148 double FGRadioStack::get_nav1_gs_needle_deflection() const {
1149 if ( nav1_inrange && nav1_has_gs ) {
1150 double x = nav1_gs_dist;
1151 double y = (fgGetDouble("/position/altitude-ft") - nav1_elev)
1153 double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
1154 return (nav1_target_gs - angle) * 5.0;
1161 // return the amount of glide slope needle deflection (.i.e. the
1162 // number of degrees we are off the glide slope * 5.0
1163 double FGRadioStack::get_nav2_gs_needle_deflection() const {
1164 if ( nav2_inrange && nav2_has_gs ) {
1165 double x = nav2_gs_dist;
1166 double y = (fgGetDouble("/position/altitude-ft") - nav2_elev)
1168 double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
1169 return (nav2_target_gs - angle) * 5.0;
1177 * Return true if the NAV1 TO flag should be active.
1180 FGRadioStack::get_nav1_to_flag () const
1183 double offset = fabs(nav1_heading - nav1_radial);
1187 return (offset <= 90.0 || offset >= 270.0);
1195 * Return true if the NAV1 FROM flag should be active.
1198 FGRadioStack::get_nav1_from_flag () const
1201 double offset = fabs(nav1_heading - nav1_radial);
1205 return (offset > 90.0 && offset < 270.0);
1213 * Return true if the NAV2 TO flag should be active.
1216 FGRadioStack::get_nav2_to_flag () const
1219 double offset = fabs(nav2_heading - nav2_radial);
1223 return (offset <= 90.0 || offset >= 270.0);
1231 * Return true if the NAV2 FROM flag should be active.
1234 FGRadioStack::get_nav2_from_flag () const
1237 double offset = fabs(nav2_heading - nav2_radial);
1241 return (offset > 90.0 && offset < 270.0);