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/event.hxx>
39 #include "radiostack.hxx"
44 static int nav1_play_count = 0;
45 static int nav2_play_count = 0;
46 static int adf_play_count = 0;
47 static time_t nav1_last_time = 0;
48 static time_t nav2_last_time = 0;
49 static time_t adf_last_time = 0;
52 FGRadioStack *current_radiostack;
56 * Boy, this is ugly! Make the VOR range vary by altitude difference.
58 static double kludgeRange ( double stationElev, double aircraftElev,
61 // Assume that the nominal range (usually
62 // 50nm) applies at a 5,000 ft difference.
64 double factor = ((aircraftElev*SG_METER_TO_FEET) - stationElev) / 5000.0;
65 double range = fabs(nominalRange * factor);
67 // Clamp the range to keep it sane; for
68 // now, never less than 25% or more than
69 // 500% of nominal range.
70 if (range < nominalRange/4.0) {
71 range = nominalRange/4.0;
72 } else if (range > nominalRange*5.0) {
73 range = nominalRange*5.0;
80 // periodic radio station search wrapper
81 static void fgRadioSearch( void ) {
82 current_radiostack->search();
86 FGRadioStack::FGRadioStack() :
87 lon_node(fgGetNode("/position/longitude-deg", true)),
88 lat_node(fgGetNode("/position/latitude-deg", true)),
89 alt_node(fgGetNode("/position/altitude-ft", true)),
109 SGPath path( globals->get_fg_root() );
111 term.append( "Navaids/range.term" );
113 low.append( "Navaids/range.low" );
115 high.append( "Navaids/range.high" );
117 term_tbl = new SGInterpTable( term.str() );
118 low_tbl = new SGInterpTable( low.str() );
119 high_tbl = new SGInterpTable( high.str() );
120 dme_last_time.stamp();
125 FGRadioStack::~FGRadioStack()
127 unbind(); // FIXME: should be called externally
136 FGRadioStack::init ()
143 update(1); // FIXME: use dt
145 // Search radio database once per second
146 global_events.Register( "fgRadioSearch()", fgRadioSearch,
147 fgEVENT::FG_EVENT_READY, 1000);
151 FGRadioStack::bind ()
154 fgTie("/radios/comm[0]/frequencies/selected-mhz", this,
155 &FGRadioStack::get_comm1_freq, &FGRadioStack::set_comm1_freq);
156 fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz");
157 fgTie("/radios/comm[0]/frequencies/standby-mhz", this,
158 &FGRadioStack::get_comm1_alt_freq, &FGRadioStack::set_comm1_alt_freq);
159 fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz");
160 fgTie("/radios/comm[0]/volume", this,
161 &FGRadioStack::get_comm1_vol_btn,
162 &FGRadioStack::set_comm1_vol_btn);
163 fgSetArchivable("/radios/comm[0]/volume");
164 fgTie("/radios/comm[0]/ident", this,
165 &FGRadioStack::get_comm1_ident_btn,
166 &FGRadioStack::set_comm1_ident_btn);
167 fgSetArchivable("/radios/comm[0]/ident");
169 fgTie("/radios/comm[1]/frequencies/selected-mhz", this,
170 &FGRadioStack::get_comm2_freq, &FGRadioStack::set_comm2_freq);
171 fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz");
172 fgTie("/radios/comm[1]/frequencies/standby-mhz", this,
173 &FGRadioStack::get_comm2_alt_freq, &FGRadioStack::set_comm2_alt_freq);
174 fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz");
175 fgTie("/radios/comm[1]/volume", this,
176 &FGRadioStack::get_comm2_vol_btn,
177 &FGRadioStack::set_comm2_vol_btn);
178 fgSetArchivable("/radios/comm[0]/volume");
179 fgTie("/radios/comm[1]/ident", this,
180 &FGRadioStack::get_comm2_ident_btn,
181 &FGRadioStack::set_comm2_ident_btn);
182 fgSetArchivable("/radios/comm[1]/ident");
184 fgTie("/radios/nav[0]/frequencies/selected-mhz", this,
185 &FGRadioStack::get_nav1_freq, &FGRadioStack::set_nav1_freq);
186 fgSetArchivable("/radios/nav[0]/frequencies/selected-mhz");
187 fgTie("/radios/nav[0]/frequencies/standby-mhz", this,
188 &FGRadioStack::get_nav1_alt_freq, &FGRadioStack::set_nav1_alt_freq);
189 fgSetArchivable("/radios/nav[0]/frequencies/standby-mhz");
190 fgTie("/radios/nav[0]/radials/selected-deg", this,
191 &FGRadioStack::get_nav1_sel_radial,
192 &FGRadioStack::set_nav1_sel_radial);
193 fgSetArchivable("/radios/nav[0]/radials/selected-deg");
194 fgTie("/radios/nav[0]/volume", this,
195 &FGRadioStack::get_nav1_vol_btn,
196 &FGRadioStack::set_nav1_vol_btn);
197 fgSetArchivable("/radios/nav[0]/volume");
198 fgTie("/radios/nav[0]/ident", this,
199 &FGRadioStack::get_nav1_ident_btn,
200 &FGRadioStack::set_nav1_ident_btn);
201 fgSetArchivable("/radios/nav[0]/ident");
204 fgTie("/radios/nav[0]/radials/actual-deg", this,
205 &FGRadioStack::get_nav1_radial);
206 fgTie("/radios/nav[0]/to-flag", this, &FGRadioStack::get_nav1_to_flag);
207 fgTie("/radios/nav[0]/from-flag", this, &FGRadioStack::get_nav1_from_flag);
208 fgTie("/radios/nav[0]/in-range", this, &FGRadioStack::get_nav1_inrange);
209 fgTie("/radios/nav[0]/heading-needle-deflection", this,
210 &FGRadioStack::get_nav1_heading_needle_deflection);
211 fgTie("/radios/nav[0]/gs-needle-deflection", this,
212 &FGRadioStack::get_nav1_gs_needle_deflection);
215 fgTie("/radios/nav[1]/frequencies/selected-mhz", this,
216 &FGRadioStack::get_nav2_freq, &FGRadioStack::set_nav2_freq);
217 fgSetArchivable("/radios/nav[1]/frequencies/selected-mhz");
218 fgTie("/radios/nav[1]/frequencies/standby-mhz", this,
219 &FGRadioStack::get_nav2_alt_freq, &FGRadioStack::set_nav2_alt_freq);
220 fgSetArchivable("/radios/nav[1]/frequencies/standby-mhz");
221 fgTie("/radios/nav[1]/radials/selected-deg", this,
222 &FGRadioStack::get_nav2_sel_radial,
223 &FGRadioStack::set_nav2_sel_radial);
224 fgSetArchivable("/radios/nav[1]/radials/selected-deg");
225 fgTie("/radios/nav[1]/volume", this,
226 &FGRadioStack::get_nav2_vol_btn,
227 &FGRadioStack::set_nav2_vol_btn);
228 fgSetArchivable("/radios/nav[1]/volume");
229 fgTie("/radios/nav[1]/ident", this,
230 &FGRadioStack::get_nav2_ident_btn,
231 &FGRadioStack::set_nav2_ident_btn);
232 fgSetArchivable("/radios/nav[1]/ident");
235 fgTie("/radios/nav[1]/radials/actual-deg", this,
236 &FGRadioStack::get_nav2_radial);
237 fgTie("/radios/nav[1]/to-flag", this, &FGRadioStack::get_nav2_to_flag);
238 fgTie("/radios/nav[1]/from-flag", this, &FGRadioStack::get_nav2_from_flag);
239 fgTie("/radios/nav[1]/in-range", this, &FGRadioStack::get_nav2_inrange);
240 fgTie("/radios/nav[1]/heading-needle-deflection", this,
241 &FGRadioStack::get_nav2_heading_needle_deflection);
242 fgTie("/radios/nav[1]/gs-needle-deflection", this,
243 &FGRadioStack::get_nav2_gs_needle_deflection);
246 fgTie("/radios/dme/frequencies/selected-khz", this,
247 &FGRadioStack::get_dme_freq, &FGRadioStack::set_dme_freq);
250 fgTie("/radios/dme/in-range", this, &FGRadioStack::get_dme_inrange);
251 fgTie("/radios/dme/distance-nm", this, &FGRadioStack::get_dme_dist);
252 fgTie("/radios/dme/speed-kt", this, &FGRadioStack::get_dme_spd);
253 fgTie("/radios/dme/ete-min", this, &FGRadioStack::get_dme_ete);
256 fgTie("/radios/adf/frequencies/selected-khz", this,
257 &FGRadioStack::get_adf_freq, &FGRadioStack::set_adf_freq);
258 fgSetArchivable("/radios/adf/frequencies/selected-khz");
259 fgTie("/radios/adf/frequencies/standby-khz", this,
260 &FGRadioStack::get_adf_alt_freq, &FGRadioStack::set_adf_alt_freq);
261 fgSetArchivable("/radios/adf/frequencies/standby-khz");
262 fgTie("/radios/adf/rotation-deg", this,
263 &FGRadioStack::get_adf_rotation, &FGRadioStack::set_adf_rotation);
264 fgSetArchivable("/radios/adf/rotation-deg");
265 fgTie("/radios/adf/volume", this,
266 &FGRadioStack::get_adf_vol_btn,
267 &FGRadioStack::set_adf_vol_btn);
268 fgSetArchivable("/radios/adf/volume");
269 fgTie("/radios/adf/ident", this,
270 &FGRadioStack::get_adf_ident_btn,
271 &FGRadioStack::set_adf_ident_btn);
272 fgSetArchivable("/radios/adf/ident");
274 fgTie("/radios/marker-beacon/inner", this,
275 &FGRadioStack::get_inner_blink);
276 fgTie("/radios/marker-beacon/middle", this,
277 &FGRadioStack::get_middle_blink);
278 fgTie("/radios/marker-beacon/outer", this,
279 &FGRadioStack::get_outer_blink);
283 FGRadioStack::unbind ()
285 fgUntie("/radios/comm[0]/frequencies/selected-mhz");
286 fgUntie("/radios/comm[0]/frequencies/standby-mhz");
287 fgUntie("/radios/comm[0]/on");
288 fgUntie("/radios/comm[0]/ident");
290 fgUntie("/radios/comm[1]/frequencies/selected-mhz");
291 fgUntie("/radios/comm[1]/frequencies/standby-mhz");
292 fgUntie("/radios/comm[1]/on");
293 fgUntie("/radios/comm[1]/ident");
295 fgUntie("/radios/nav[0]/frequencies/selected-mhz");
296 fgUntie("/radios/nav[0]/frequencies/standby-mhz");
297 fgUntie("/radios/nav[0]/radials/actual-deg");
298 fgUntie("/radios/nav[0]/radials/selected-deg");
299 fgUntie("/radios/nav[0]/on");
300 fgUntie("/radios/nav[0]/ident");
301 fgUntie("/radios/nav[0]/to-flag");
302 fgUntie("/radios/nav[0]/from-flag");
303 fgUntie("/radios/nav[0]/in-range");
304 fgUntie("/radios/nav[0]/heading-needle-deflection");
305 fgUntie("/radios/nav[0]/gs-needle-deflection");
307 fgUntie("/radios/nav[1]/frequencies/selected-mhz");
308 fgUntie("/radios/nav[1]/frequencies/standby-mhz");
309 fgUntie("/radios/nav[1]/radials/actual-deg");
310 fgUntie("/radios/nav[1]/radials/selected-deg");
311 fgUntie("/radios/nav[1]/on");
312 fgUntie("/radios/nav[1]/ident");
313 fgUntie("/radios/nav[1]/to-flag");
314 fgUntie("/radios/nav[1]/from-flag");
315 fgUntie("/radios/nav[1]/in-range");
316 fgUntie("/radios/nav[1]/heading-needle-deflection");
317 fgUntie("/radios/nav[1]/gs-needle-deflection");
319 fgUntie("/radios/dme/frequencies/selected-khz");
322 fgUntie("/radios/dme/in-range");
323 fgUntie("/radios/dme/distance-nm");
324 fgUntie("/radios/dme/speed-kt");
325 fgUntie("/radios/dme/ete-min");
327 fgUntie("/radios/adf/frequencies/selected-khz");
328 fgUntie("/radios/adf/frequencies/standby-khz");
329 fgUntie("/radios/adf/rotation-deg");
330 fgUntie("/radios/adf/on");
331 fgUntie("/radios/adf/ident");
333 fgUntie("/radios/marker-beacon/inner");
334 fgUntie("/radios/marker-beacon/middle");
335 fgUntie("/radios/marker-beacon/outer");
339 // model standard VOR/DME/TACAN service volumes as per AIM 1-1-8
340 double FGRadioStack::adjustNavRange( double stationElev, double aircraftElev,
341 double nominalRange )
343 // extend out actual usable range to be 1.3x the published safe range
344 const double usability_factor = 1.3;
346 // assumptions we model the standard service volume, plus
347 // ... rather than specifying a cylinder, we model a cone that
348 // contains the cylinder. Then we put an upside down cone on top
349 // to model diminishing returns at too-high altitudes.
351 // altitude difference
352 double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
353 // cout << "aircraft elev = " << aircraftElev * SG_METER_TO_FEET
354 // << " station elev = " << stationElev << endl;
356 if ( nominalRange < 25.0 + SG_EPSILON ) {
357 // Standard Terminal Service Volume
358 return term_tbl->interpolate( alt ) * usability_factor;
359 } else if ( nominalRange < 50.0 + SG_EPSILON ) {
360 // Standard Low Altitude Service Volume
361 // table is based on range of 40, scale to actual range
362 return low_tbl->interpolate( alt ) * nominalRange / 40.0
365 // Standard High Altitude Service Volume
366 // table is based on range of 130, scale to actual range
367 return high_tbl->interpolate( alt ) * nominalRange / 130.0
373 // model standard ILS service volumes as per AIM 1-1-9
374 double FGRadioStack::adjustILSRange( double stationElev, double aircraftElev,
375 double offsetDegrees, double distance )
377 // assumptions we model the standard service volume, plus
379 // altitude difference
380 // double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
381 double offset = fabs( offsetDegrees );
384 return FG_ILS_DEFAULT_RANGE;
385 } else if ( offset < 35 ) {
386 return 10 + (35 - offset) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
387 } else if ( offset < 45 ) {
388 return (45 - offset);
389 } else if ( offset > 170 ) {
390 return FG_ILS_DEFAULT_RANGE;
391 } else if ( offset > 145 ) {
392 return 10 + (offset - 145) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
393 } else if ( offset > 135 ) {
394 return (offset - 135);
401 // Update the various nav values based on position and valid tuned in navs
403 FGRadioStack::update(int dt)
405 double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
406 double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
407 double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
411 Point3D aircraft = sgGeodToCart( Point3D( lon, lat, elev ) );
415 ////////////////////////////////////////////////////////////////////////
417 ////////////////////////////////////////////////////////////////////////
420 station = Point3D( nav1_x, nav1_y, nav1_z );
421 nav1_loc_dist = aircraft.distance3D( station );
424 station = Point3D( nav1_gs_x, nav1_gs_y, nav1_gs_z );
425 nav1_gs_dist = aircraft.distance3D( station );
431 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
432 nav1_loclat, nav1_loclon,
434 // cout << "az1 = " << az1 << " magvar = " << nav1_magvar << endl;
435 nav1_heading = az1 - nav1_magvar;
436 // cout << " heading = " << nav1_heading
437 // << " dist = " << nav1_dist << endl;
440 double offset = nav1_heading - nav1_radial;
441 while ( offset < -180.0 ) { offset += 360.0; }
442 while ( offset > 180.0 ) { offset -= 360.0; }
443 // cout << "ils offset = " << offset << endl;
444 nav1_effective_range = adjustILSRange(nav1_elev, elev, offset,
445 nav1_loc_dist * SG_METER_TO_NM );
447 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
449 // cout << "nav1 range = " << nav1_effective_range
450 // << " (" << nav1_range << ")" << endl;
452 if ( nav1_loc_dist < nav1_effective_range * SG_NM_TO_METER ) {
454 } else if ( nav1_loc_dist < 2 * nav1_effective_range * SG_NM_TO_METER ) {
455 nav1_inrange = sg_random() <
456 ( 2 * nav1_effective_range * SG_NM_TO_METER - nav1_loc_dist ) /
457 (nav1_effective_range * SG_NM_TO_METER);
459 nav1_inrange = false;
463 nav1_radial = nav1_sel_radial;
466 nav1_inrange = false;
467 // cout << "not picking up vor. :-(" << endl;
470 #ifdef ENABLE_AUDIO_SUPPORT
471 if ( nav1_valid && nav1_inrange ) {
472 // play station ident via audio system if on + ident,
473 // otherwise turn it off
474 if ( nav1_vol_btn > 0.1 && nav1_ident_btn ) {
475 FGSimpleSound *sound;
476 sound = globals->get_soundmgr()->find( "nav1-vor-ident" );
477 sound->set_volume( nav1_vol_btn * 0.3 );
478 sound = globals->get_soundmgr()->find( "nav1-dme-ident" );
479 sound->set_volume( nav1_vol_btn * 0.3 );
480 if ( nav1_last_time <
481 globals->get_time_params()->get_cur_time() - 30 ) {
482 nav1_last_time = globals->get_time_params()->get_cur_time();
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 sound->set_volume( nav2_vol_btn * 0.3 );
569 sound = globals->get_soundmgr()->find( "nav2-dme-ident" );
570 sound->set_volume( nav2_vol_btn * 0.3 );
571 if ( nav2_last_time <
572 globals->get_time_params()->get_cur_time() - 30 ) {
573 nav2_last_time = globals->get_time_params()->get_cur_time();
576 if ( nav2_play_count < 4 ) {
578 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") ) {
579 globals->get_soundmgr()->play_once( "nav2-vor-ident" );
582 } else if ( nav2_play_count < 5 && nav2_has_dme ) {
584 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") &&
585 !globals->get_soundmgr()->is_playing("nav2-dme-ident") ) {
586 globals->get_soundmgr()->play_once( "nav2-dme-ident" );
591 globals->get_soundmgr()->stop( "nav2-vor-ident" );
592 globals->get_soundmgr()->stop( "nav2-dme-ident" );
598 ////////////////////////////////////////////////////////////////////////
600 ////////////////////////////////////////////////////////////////////////
603 station = Point3D( dme_x, dme_y, dme_z );
604 dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM;
605 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
606 if (dme_dist < dme_effective_range * SG_NM_TO_METER) {
608 } else if (dme_dist < 2 * dme_effective_range * SG_NM_TO_METER) {
609 dme_inrange = sg_random() <
610 (2 * dme_effective_range * SG_NM_TO_METER - dme_dist) /
611 (dme_effective_range * SG_NM_TO_METER);
616 SGTimeStamp current_time;
617 station = Point3D( dme_x, dme_y, dme_z );
618 dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM;
619 current_time.stamp();
620 long dMs = (current_time - dme_last_time) / 1000;
621 // Update every second
623 double dDist = dme_dist - dme_prev_dist;
624 dme_spd = fabs((dDist/dMs) * 3600000);
625 // FIXME: the panel should be able to
629 dme_ete = fabs((dme_dist/dme_spd) * 60.0);
630 // FIXME: the panel should be able to
634 dme_prev_dist = dme_dist;
635 dme_last_time.stamp();
645 ////////////////////////////////////////////////////////////////////////
647 ////////////////////////////////////////////////////////////////////////
650 // staightline distance
651 station = Point3D( adf_x, adf_y, adf_z );
652 adf_dist = aircraft.distance3D( station );
655 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
659 // cout << " heading = " << nav2_heading
660 // << " dist = " << nav2_dist << endl;
662 adf_effective_range = kludgeRange(adf_elev, elev, adf_range);
663 if ( adf_dist < adf_effective_range * SG_NM_TO_METER ) {
665 } else if ( adf_dist < 2 * adf_effective_range * SG_NM_TO_METER ) {
666 adf_inrange = sg_random() <
667 ( 2 * adf_effective_range * SG_NM_TO_METER - adf_dist ) /
668 (adf_effective_range * SG_NM_TO_METER);
676 #ifdef ENABLE_AUDIO_SUPPORT
677 if ( adf_valid && adf_inrange ) {
678 // play station ident via audio system if on + ident,
679 // otherwise turn it off
680 if ( adf_vol_btn > 0.1 && adf_ident_btn ) {
681 FGSimpleSound *sound;
682 sound = globals->get_soundmgr()->find( "adf-ident" );
683 sound->set_volume( adf_vol_btn * 0.3 );
685 globals->get_time_params()->get_cur_time() - 30 ) {
686 adf_last_time = globals->get_time_params()->get_cur_time();
689 if ( adf_play_count < 4 ) {
691 if ( !globals->get_soundmgr()->is_playing("adf-ident") ) {
692 globals->get_soundmgr()->play_once( "adf-ident" );
697 globals->get_soundmgr()->stop( "adf-ident" );
702 // marker beacon blinking
703 bool light_on = ( outer_blink || middle_blink || inner_blink );
707 if ( light_on && (current - blink > 400000) ) {
710 } else if ( !light_on && (current - blink > 100000) ) {
715 if ( outer_marker ) {
716 outer_blink = light_on;
721 if ( middle_marker ) {
722 middle_blink = light_on;
724 middle_blink = false;
727 if ( inner_marker ) {
728 inner_blink = light_on;
733 // cout << outer_blink << " " << middle_blink << " " << inner_blink << endl;
737 // Update current nav/adf radio stations based on current postition
738 void FGRadioStack::search()
740 static FGMkrBeacon::fgMkrBeacType last_beacon = FGMkrBeacon::NOBEACON;
742 double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
743 double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
744 double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
746 // FIXME: the panel should handle this
747 // don't worry about overhead for now,
748 // since this is handled only periodically
749 int dme_switch_pos = fgGetInt("/radios/dme/switch-position");
750 if (dme_switch_pos == 0) {
753 } else if (dme_switch_pos == 1) {
754 if (dme_freq != nav1_freq) {
755 dme_freq = nav1_freq;
758 } else if (dme_switch_pos == 3) {
759 if (dme_freq != nav2_freq) {
760 dme_freq = nav2_freq;
768 static string last_nav1_ident = "";
769 static string last_nav2_ident = "";
770 static string last_adf_ident = "";
771 static bool last_nav1_vor = false;
772 static bool last_nav2_vor = false;
774 ////////////////////////////////////////////////////////////////////////
776 ////////////////////////////////////////////////////////////////////////
778 if ( current_ilslist->query( lon, lat, elev, nav1_freq, &ils ) ) {
779 nav1_ident = ils.get_locident();
781 if ( last_nav1_ident != nav1_ident || last_nav1_vor ) {
782 nav1_trans_ident = ils.get_trans_ident();
783 last_nav1_ident = nav1_ident;
784 last_nav1_vor = false;
786 nav1_has_dme = ils.get_has_dme();
787 nav1_has_gs = ils.get_has_gs();
789 nav1_loclon = ils.get_loclon();
790 nav1_loclat = ils.get_loclat();
791 nav1_gslon = ils.get_gslon();
792 nav1_gslat = ils.get_gslat();
793 nav1_elev = ils.get_gselev();
795 nav1_range = FG_ILS_DEFAULT_RANGE;
796 nav1_effective_range = nav1_range;
797 nav1_target_gs = ils.get_gsangle();
798 nav1_radial = ils.get_locheading();
799 while ( nav1_radial < 0.0 ) { nav1_radial += 360.0; }
800 while ( nav1_radial > 360.0 ) { nav1_radial -= 360.0; }
801 nav1_x = ils.get_x();
802 nav1_y = ils.get_y();
803 nav1_z = ils.get_z();
804 nav1_gs_x = ils.get_gs_x();
805 nav1_gs_y = ils.get_gs_y();
806 nav1_gs_z = ils.get_gs_z();
808 #ifdef ENABLE_AUDIO_SUPPORT
809 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
810 globals->get_soundmgr()->remove( "nav1-vor-ident" );
812 FGSimpleSound *sound;
813 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
814 sound->set_volume( 0.3 );
815 globals->get_soundmgr()->add( sound, "nav1-vor-ident" );
817 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
818 globals->get_soundmgr()->remove( "nav1-dme-ident" );
820 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
821 sound->set_volume( 0.3 );
822 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
824 int offset = (int)(sg_random() * 30.0);
825 nav1_play_count = offset / 4;
826 nav1_last_time = globals->get_time_params()->get_cur_time() -
828 // cout << "offset = " << offset << " play_count = "
829 // << nav1_play_count
830 // << " nav1_last_time = " << nav1_last_time
831 // << " current time = "
832 // << globals->get_time_params()->get_cur_time() << endl;
835 // cout << "Found an ils station in range" << endl;
836 // cout << " id = " << ils.get_locident() << endl;
838 } else if ( current_navlist->query( lon, lat, elev, nav1_freq, &nav ) ) {
839 nav1_ident = nav.get_ident();
841 if ( last_nav1_ident != nav1_ident || !last_nav1_vor ) {
842 last_nav1_ident = nav1_ident;
843 last_nav1_vor = true;
844 nav1_trans_ident = nav.get_trans_ident();
846 nav1_has_dme = nav.get_has_dme();
848 nav1_loclon = nav.get_lon();
849 nav1_loclat = nav.get_lat();
850 nav1_elev = nav.get_elev();
851 nav1_magvar = nav.get_magvar();
852 nav1_range = nav.get_range();
853 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
854 nav1_target_gs = 0.0;
855 nav1_radial = nav1_sel_radial;
856 nav1_x = nav.get_x();
857 nav1_y = nav.get_y();
858 nav1_z = nav.get_z();
860 #ifdef ENABLE_AUDIO_SUPPORT
861 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
862 globals->get_soundmgr()->remove( "nav1-vor-ident" );
864 FGSimpleSound *sound;
865 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
866 sound->set_volume( 0.3 );
867 globals->get_soundmgr()->add( sound, "nav1-vor-ident" );
869 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
870 globals->get_soundmgr()->remove( "nav1-dme-ident" );
872 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
873 sound->set_volume( 0.3 );
874 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
876 int offset = (int)(sg_random() * 30.0);
877 nav1_play_count = offset / 4;
878 nav1_last_time = globals->get_time_params()->get_cur_time() -
880 // cout << "offset = " << offset << " play_count = "
881 // << nav1_play_count << " nav1_last_time = "
882 // << nav1_last_time << " current time = "
883 // << globals->get_time_params()->get_cur_time() << endl;
886 // cout << "Found a vor station in range" << endl;
887 // cout << " id = " << nav.get_ident() << endl;
893 nav1_trans_ident = "";
894 last_nav1_ident = "";
895 #ifdef ENABLE_AUDIO_SUPPORT
896 globals->get_soundmgr()->remove( "nav1-vor-ident" );
897 globals->get_soundmgr()->remove( "nav1-dme-ident" );
899 // cout << "not picking up vor1. :-(" << endl;
903 ////////////////////////////////////////////////////////////////////////
905 ////////////////////////////////////////////////////////////////////////
907 if ( current_ilslist->query( lon, lat, elev, nav2_freq, &ils ) ) {
908 nav2_ident = ils.get_locident();
910 if ( last_nav2_ident != nav2_ident || last_nav2_vor ) {
911 last_nav2_ident = nav2_ident;
912 last_nav2_vor = false;
913 nav2_trans_ident = ils.get_trans_ident();
915 nav2_has_dme = ils.get_has_dme();
916 nav2_has_gs = ils.get_has_gs();
918 nav2_loclon = ils.get_loclon();
919 nav2_loclat = ils.get_loclat();
920 nav2_elev = ils.get_gselev();
922 nav2_range = FG_ILS_DEFAULT_RANGE;
923 nav2_effective_range = nav2_range;
924 nav2_target_gs = ils.get_gsangle();
925 nav2_radial = ils.get_locheading();
926 while ( nav2_radial < 0.0 ) { nav2_radial += 360.0; }
927 while ( nav2_radial > 360.0 ) { nav2_radial -= 360.0; }
928 nav2_x = ils.get_x();
929 nav2_y = ils.get_y();
930 nav2_z = ils.get_z();
931 nav2_gs_x = ils.get_gs_x();
932 nav2_gs_y = ils.get_gs_y();
933 nav2_gs_z = ils.get_gs_z();
935 #ifdef ENABLE_AUDIO_SUPPORT
936 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
937 globals->get_soundmgr()->remove( "nav2-vor-ident" );
939 FGSimpleSound *sound;
940 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
941 sound->set_volume( 0.3 );
942 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
944 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
945 globals->get_soundmgr()->remove( "nav2-dme-ident" );
947 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
948 sound->set_volume( 0.3 );
949 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
951 int offset = (int)(sg_random() * 30.0);
952 nav2_play_count = offset / 4;
953 nav2_last_time = globals->get_time_params()->get_cur_time() -
955 // cout << "offset = " << offset << " play_count = "
956 // << nav2_play_count << " nav2_last_time = "
957 // << nav2_last_time << " current time = "
958 // << globals->get_time_params()->get_cur_time() << endl;
961 // cout << "Found an ils station in range" << endl;
962 // cout << " id = " << ils.get_locident() << endl;
964 } else if ( current_navlist->query( lon, lat, elev, nav2_freq, &nav ) ) {
965 nav2_ident = nav.get_ident();
967 if ( last_nav2_ident != nav2_ident || !last_nav2_vor ) {
968 last_nav2_ident = nav2_ident;
969 last_nav2_vor = true;
970 nav2_trans_ident = nav.get_trans_ident();
972 nav2_has_dme = nav.get_has_dme();
973 nav2_has_dme = false;
974 nav2_loclon = nav.get_lon();
975 nav2_loclat = nav.get_lat();
976 nav2_elev = nav.get_elev();
977 nav2_magvar = nav.get_magvar();
978 nav2_range = nav.get_range();
979 nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
980 nav2_target_gs = 0.0;
981 nav2_radial = nav2_sel_radial;
982 nav2_x = nav.get_x();
983 nav2_y = nav.get_y();
984 nav2_z = nav.get_z();
986 #ifdef ENABLE_AUDIO_SUPPORT
987 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
988 globals->get_soundmgr()->remove( "nav2-vor-ident" );
990 FGSimpleSound *sound;
991 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
992 sound->set_volume( 0.3 );
993 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
995 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
996 globals->get_soundmgr()->remove( "nav2-dme-ident" );
998 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
999 sound->set_volume( 0.3 );
1000 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
1002 int offset = (int)(sg_random() * 30.0);
1003 nav2_play_count = offset / 4;
1004 nav2_last_time = globals->get_time_params()->get_cur_time() -
1006 // cout << "offset = " << offset << " play_count = "
1007 // << nav2_play_count << " nav2_last_time = "
1008 // << nav2_last_time << " current time = "
1009 // << globals->get_time_params()->get_cur_time() << endl;
1012 // cout << "Found a vor station in range" << endl;
1013 // cout << " id = " << nav.get_ident() << endl;
1019 nav2_trans_ident = "";
1020 last_nav2_ident = "";
1021 #ifdef ENABLE_AUDIO_SUPPORT
1022 globals->get_soundmgr()->remove( "nav2-vor-ident" );
1023 globals->get_soundmgr()->remove( "nav2-dme-ident" );
1025 // cout << "not picking up vor1. :-(" << endl;
1029 ////////////////////////////////////////////////////////////////////////
1031 ////////////////////////////////////////////////////////////////////////
1033 if ( current_ilslist->query( lon, lat, elev, dme_freq, &ils ) ) {
1034 if (ils.get_has_dme()) {
1036 dme_lon = ils.get_loclon();
1037 dme_lat = ils.get_loclat();
1038 dme_elev = ils.get_gselev();
1039 dme_range = FG_ILS_DEFAULT_RANGE;
1040 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
1041 dme_x = ils.get_dme_x();
1042 dme_y = ils.get_dme_y();
1043 dme_z = ils.get_dme_z();
1045 } else if ( current_navlist->query( lon, lat, elev, dme_freq, &nav ) ) {
1046 if (nav.get_has_dme()) {
1048 dme_lon = nav.get_lon();
1049 dme_lat = nav.get_lat();
1050 dme_elev = nav.get_elev();
1051 dme_range = nav.get_range();
1052 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
1053 dme_x = nav.get_x();
1054 dme_y = nav.get_y();
1055 dme_z = nav.get_z();
1063 ////////////////////////////////////////////////////////////////////////
1065 ////////////////////////////////////////////////////////////////////////
1067 FGMkrBeacon::fgMkrBeacType beacon_type
1068 = current_beacons->query( lon * SGD_RADIANS_TO_DEGREES,
1069 lat * SGD_RADIANS_TO_DEGREES, elev );
1071 outer_marker = middle_marker = inner_marker = false;
1073 if ( beacon_type == FGMkrBeacon::OUTER ) {
1074 outer_marker = true;
1075 // cout << "OUTER MARKER" << endl;
1076 #ifdef ENABLE_AUDIO_SUPPORT
1077 if ( last_beacon != FGMkrBeacon::OUTER ) {
1078 if ( ! globals->get_soundmgr()->exists( "outer-marker" ) ) {
1079 FGSimpleSound *sound = beacon.get_outer();
1080 sound->set_volume( 0.3 );
1081 globals->get_soundmgr()->add( sound, "outer-marker" );
1083 if ( !globals->get_soundmgr()->is_playing("outer-marker") ) {
1084 globals->get_soundmgr()->play_looped( "outer-marker" );
1088 } else if ( beacon_type == FGMkrBeacon::MIDDLE ) {
1089 middle_marker = true;
1090 // cout << "MIDDLE MARKER" << endl;
1091 #ifdef ENABLE_AUDIO_SUPPORT
1092 if ( last_beacon != FGMkrBeacon::MIDDLE ) {
1093 if ( ! globals->get_soundmgr()->exists( "middle-marker" ) ) {
1094 FGSimpleSound *sound = beacon.get_middle();
1095 sound->set_volume( 0.3 );
1096 globals->get_soundmgr()->add( sound, "middle-marker" );
1098 if ( !globals->get_soundmgr()->is_playing("middle-marker") ) {
1099 globals->get_soundmgr()->play_looped( "middle-marker" );
1103 } else if ( beacon_type == FGMkrBeacon::INNER ) {
1104 inner_marker = true;
1105 // cout << "INNER MARKER" << endl;
1106 #ifdef ENABLE_AUDIO_SUPPORT
1107 if ( last_beacon != FGMkrBeacon::INNER ) {
1108 if ( ! globals->get_soundmgr()->exists( "inner-marker" ) ) {
1109 FGSimpleSound *sound = beacon.get_inner();
1110 sound->set_volume( 0.3 );
1111 globals->get_soundmgr()->add( sound, "inner-marker" );
1113 if ( !globals->get_soundmgr()->is_playing("inner-marker") ) {
1114 globals->get_soundmgr()->play_looped( "inner-marker" );
1119 // cout << "no marker" << endl;
1120 #ifdef ENABLE_AUDIO_SUPPORT
1121 globals->get_soundmgr()->stop( "outer-marker" );
1122 globals->get_soundmgr()->stop( "middle-marker" );
1123 globals->get_soundmgr()->stop( "inner-marker" );
1126 last_beacon = beacon_type;
1129 ////////////////////////////////////////////////////////////////////////
1131 ////////////////////////////////////////////////////////////////////////
1133 if ( current_navlist->query( lon, lat, elev, adf_freq, &nav ) ) {
1135 #if defined( _MSC_VER ) || defined(__MINGW32__)
1136 _snprintf( freq, 10, "%.0f", adf_freq );
1138 snprintf( freq, 10, "%.0f", adf_freq );
1141 adf_ident += nav.get_ident();
1142 // cout << "adf ident = " << adf_ident << endl;
1144 if ( last_adf_ident != adf_ident ) {
1145 last_adf_ident = adf_ident;
1147 adf_trans_ident = nav.get_trans_ident();
1148 adf_lon = nav.get_lon();
1149 adf_lat = nav.get_lat();
1150 adf_elev = nav.get_elev();
1151 adf_range = nav.get_range();
1152 adf_effective_range = kludgeRange(adf_elev, elev, adf_range);
1153 adf_x = nav.get_x();
1154 adf_y = nav.get_y();
1155 adf_z = nav.get_z();
1157 #ifdef ENABLE_AUDIO_SUPPORT
1158 if ( globals->get_soundmgr()->exists( "adf-ident" ) ) {
1159 globals->get_soundmgr()->remove( "adf-ident" );
1161 FGSimpleSound *sound;
1162 sound = morse.make_ident( adf_trans_ident, LO_FREQUENCY );
1163 sound->set_volume( 0.3 );
1164 globals->get_soundmgr()->add( sound, "adf-ident" );
1166 int offset = (int)(sg_random() * 30.0);
1167 adf_play_count = offset / 4;
1168 adf_last_time = globals->get_time_params()->get_cur_time() -
1170 // cout << "offset = " << offset << " play_count = "
1171 // << adf_play_count << " adf_last_time = "
1172 // << adf_last_time << " current time = "
1173 // << globals->get_time_params()->get_cur_time() << endl;
1176 // cout << "Found an adf station in range" << endl;
1177 // cout << " id = " << nav.get_ident() << endl;
1182 adf_trans_ident = "";
1183 #ifdef ENABLE_AUDIO_SUPPORT
1184 globals->get_soundmgr()->remove( "adf-ident" );
1186 last_adf_ident = "";
1187 // cout << "not picking up adf. :-(" << endl;
1192 // return the amount of heading needle deflection, returns a value
1193 // clamped to the range of ( -10 , 10 )
1194 double FGRadioStack::get_nav1_heading_needle_deflection() const {
1197 if ( nav1_inrange ) {
1198 r = nav1_heading - nav1_radial;
1199 // cout << "Radial = " << nav1_radial
1200 // << " Bearing = " << nav1_heading << endl;
1202 while ( r > 180.0 ) { r -= 360.0;}
1203 while ( r < -180.0 ) { r += 360.0;}
1204 if ( fabs(r) > 90.0 ) {
1205 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
1211 // According to Robin Peel, the ILS is 4x more sensitive than a vor
1212 if ( nav1_loc ) { r *= 4.0; }
1213 if ( r < -10.0 ) { r = -10.0; }
1214 if ( r > 10.0 ) { r = 10.0; }
1222 // return the amount of heading needle deflection, returns a value
1223 // clamped to the range of ( -10 , 10 )
1224 double FGRadioStack::get_nav2_heading_needle_deflection() const {
1227 if ( nav2_inrange ) {
1228 r = nav2_heading - nav2_radial;
1229 // cout << "Radial = " << nav2_radial
1230 // << " Bearing = " << nav2_heading << endl;
1232 while (r> 180.0) r-=360.0;
1233 while (r<-180.0) r+=360.0;
1234 if ( fabs(r) > 90.0 )
1235 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
1236 // According to Robin Peel, the ILS is 4x more sensitive than a vor
1237 if ( nav2_loc ) r *= 4.0;
1238 if ( r < -10.0 ) r = -10.0;
1239 if ( r > 10.0 ) r = 10.0;
1247 // return the amount of glide slope needle deflection (.i.e. the
1248 // number of degrees we are off the glide slope * 5.0
1249 double FGRadioStack::get_nav1_gs_needle_deflection() const {
1250 if ( nav1_inrange && nav1_has_gs ) {
1251 double x = nav1_gs_dist;
1252 double y = (fgGetDouble("/position/altitude-ft") - nav1_elev)
1254 double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
1255 return (nav1_target_gs - angle) * 5.0;
1262 // return the amount of glide slope needle deflection (.i.e. the
1263 // number of degrees we are off the glide slope * 5.0
1264 double FGRadioStack::get_nav2_gs_needle_deflection() const {
1265 if ( nav2_inrange && nav2_has_gs ) {
1266 double x = nav2_gs_dist;
1267 double y = (fgGetDouble("/position/altitude-ft") - nav2_elev)
1269 double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
1270 return (nav2_target_gs - angle) * 5.0;
1278 * Return true if the NAV1 TO flag should be active.
1281 FGRadioStack::get_nav1_to_flag () const
1284 double offset = fabs(nav1_heading - nav1_radial);
1288 return (offset <= 90.0 || offset >= 270.0);
1296 * Return true if the NAV1 FROM flag should be active.
1299 FGRadioStack::get_nav1_from_flag () const
1302 double offset = fabs(nav1_heading - nav1_radial);
1306 return (offset > 90.0 && offset < 270.0);
1314 * Return true if the NAV2 TO flag should be active.
1317 FGRadioStack::get_nav2_to_flag () const
1320 double offset = fabs(nav2_heading - nav2_radial);
1324 return (offset <= 90.0 || offset >= 270.0);
1332 * Return true if the NAV2 FROM flag should be active.
1335 FGRadioStack::get_nav2_from_flag () const
1338 double offset = fabs(nav2_heading - nav2_radial);
1342 return (offset > 90.0 && offset < 270.0);