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)),
112 SGPath path( globals->get_fg_root() );
114 term.append( "Navaids/range.term" );
116 low.append( "Navaids/range.low" );
118 high.append( "Navaids/range.high" );
120 term_tbl = new SGInterpTable( term.str() );
121 low_tbl = new SGInterpTable( low.str() );
122 high_tbl = new SGInterpTable( high.str() );
123 dme_last_time.stamp();
128 FGRadioStack::~FGRadioStack()
130 unbind(); // FIXME: should be called externally
139 FGRadioStack::init ()
146 update(1); // FIXME: use dt
148 // Search radio database once per second
149 global_events.Register( "fgRadioSearch()", fgRadioSearch,
150 fgEVENT::FG_EVENT_READY, 1000);
154 FGRadioStack::bind ()
157 fgTie("/radios/comm[0]/frequencies/selected-mhz", this,
158 &FGRadioStack::get_comm1_freq, &FGRadioStack::set_comm1_freq);
159 fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz");
160 fgTie("/radios/comm[0]/frequencies/standby-mhz", this,
161 &FGRadioStack::get_comm1_alt_freq, &FGRadioStack::set_comm1_alt_freq);
162 fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz");
163 fgTie("/radios/comm[0]/volume", this,
164 &FGRadioStack::get_comm1_vol_btn,
165 &FGRadioStack::set_comm1_vol_btn);
166 fgSetArchivable("/radios/comm[0]/volume");
167 fgTie("/radios/comm[0]/ident", this,
168 &FGRadioStack::get_comm1_ident_btn,
169 &FGRadioStack::set_comm1_ident_btn);
170 fgSetArchivable("/radios/comm[0]/ident");
172 fgTie("/radios/comm[1]/frequencies/selected-mhz", this,
173 &FGRadioStack::get_comm2_freq, &FGRadioStack::set_comm2_freq);
174 fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz");
175 fgTie("/radios/comm[1]/frequencies/standby-mhz", this,
176 &FGRadioStack::get_comm2_alt_freq, &FGRadioStack::set_comm2_alt_freq);
177 fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz");
178 fgTie("/radios/comm[1]/volume", this,
179 &FGRadioStack::get_comm2_vol_btn,
180 &FGRadioStack::set_comm2_vol_btn);
181 fgSetArchivable("/radios/comm[0]/volume");
182 fgTie("/radios/comm[1]/ident", this,
183 &FGRadioStack::get_comm2_ident_btn,
184 &FGRadioStack::set_comm2_ident_btn);
185 fgSetArchivable("/radios/comm[1]/ident");
187 fgTie("/radios/nav[0]/frequencies/selected-mhz", this,
188 &FGRadioStack::get_nav1_freq, &FGRadioStack::set_nav1_freq);
189 fgSetArchivable("/radios/nav[0]/frequencies/selected-mhz");
190 fgTie("/radios/nav[0]/frequencies/standby-mhz", this,
191 &FGRadioStack::get_nav1_alt_freq, &FGRadioStack::set_nav1_alt_freq);
192 fgSetArchivable("/radios/nav[0]/frequencies/standby-mhz");
193 fgTie("/radios/nav[0]/radials/selected-deg", this,
194 &FGRadioStack::get_nav1_sel_radial,
195 &FGRadioStack::set_nav1_sel_radial);
196 fgSetArchivable("/radios/nav[0]/radials/selected-deg");
197 fgTie("/radios/nav[0]/volume", this,
198 &FGRadioStack::get_nav1_vol_btn,
199 &FGRadioStack::set_nav1_vol_btn);
200 fgSetArchivable("/radios/nav[0]/volume");
201 fgTie("/radios/nav[0]/ident", this,
202 &FGRadioStack::get_nav1_ident_btn,
203 &FGRadioStack::set_nav1_ident_btn);
204 fgSetArchivable("/radios/nav[0]/ident");
207 fgTie("/radios/nav[0]/radials/actual-deg", this,
208 &FGRadioStack::get_nav1_radial);
209 fgTie("/radios/nav[0]/to-flag", this, &FGRadioStack::get_nav1_to_flag);
210 fgTie("/radios/nav[0]/from-flag", this, &FGRadioStack::get_nav1_from_flag);
211 fgTie("/radios/nav[0]/in-range", this, &FGRadioStack::get_nav1_inrange);
212 fgTie("/radios/nav[0]/heading-needle-deflection", this,
213 &FGRadioStack::get_nav1_heading_needle_deflection);
214 fgTie("/radios/nav[0]/gs-needle-deflection", this,
215 &FGRadioStack::get_nav1_gs_needle_deflection);
218 fgTie("/radios/nav[1]/frequencies/selected-mhz", this,
219 &FGRadioStack::get_nav2_freq, &FGRadioStack::set_nav2_freq);
220 fgSetArchivable("/radios/nav[1]/frequencies/selected-mhz");
221 fgTie("/radios/nav[1]/frequencies/standby-mhz", this,
222 &FGRadioStack::get_nav2_alt_freq, &FGRadioStack::set_nav2_alt_freq);
223 fgSetArchivable("/radios/nav[1]/frequencies/standby-mhz");
224 fgTie("/radios/nav[1]/radials/selected-deg", this,
225 &FGRadioStack::get_nav2_sel_radial,
226 &FGRadioStack::set_nav2_sel_radial);
227 fgSetArchivable("/radios/nav[1]/radials/selected-deg");
228 fgTie("/radios/nav[1]/volume", this,
229 &FGRadioStack::get_nav2_vol_btn,
230 &FGRadioStack::set_nav2_vol_btn);
231 fgSetArchivable("/radios/nav[1]/volume");
232 fgTie("/radios/nav[1]/ident", this,
233 &FGRadioStack::get_nav2_ident_btn,
234 &FGRadioStack::set_nav2_ident_btn);
235 fgSetArchivable("/radios/nav[1]/ident");
238 fgTie("/radios/nav[1]/radials/actual-deg", this,
239 &FGRadioStack::get_nav2_radial);
240 fgTie("/radios/nav[1]/to-flag", this, &FGRadioStack::get_nav2_to_flag);
241 fgTie("/radios/nav[1]/from-flag", this, &FGRadioStack::get_nav2_from_flag);
242 fgTie("/radios/nav[1]/in-range", this, &FGRadioStack::get_nav2_inrange);
243 fgTie("/radios/nav[1]/heading-needle-deflection", this,
244 &FGRadioStack::get_nav2_heading_needle_deflection);
245 fgTie("/radios/nav[1]/gs-needle-deflection", this,
246 &FGRadioStack::get_nav2_gs_needle_deflection);
249 fgTie("/radios/dme/frequencies/selected-khz", this,
250 &FGRadioStack::get_dme_freq, &FGRadioStack::set_dme_freq);
253 fgTie("/radios/dme/in-range", this, &FGRadioStack::get_dme_inrange);
254 fgTie("/radios/dme/distance-nm", this, &FGRadioStack::get_dme_dist);
255 fgTie("/radios/dme/speed-kt", this, &FGRadioStack::get_dme_spd);
256 fgTie("/radios/dme/ete-min", this, &FGRadioStack::get_dme_ete);
259 fgTie("/radios/adf/frequencies/selected-khz", this,
260 &FGRadioStack::get_adf_freq, &FGRadioStack::set_adf_freq);
261 fgSetArchivable("/radios/adf/frequencies/selected-khz");
262 fgTie("/radios/adf/frequencies/standby-khz", this,
263 &FGRadioStack::get_adf_alt_freq, &FGRadioStack::set_adf_alt_freq);
264 fgSetArchivable("/radios/adf/frequencies/standby-khz");
265 fgTie("/radios/adf/rotation-deg", this,
266 &FGRadioStack::get_adf_rotation, &FGRadioStack::set_adf_rotation);
267 fgSetArchivable("/radios/adf/rotation-deg");
268 fgTie("/radios/adf/volume", this,
269 &FGRadioStack::get_adf_vol_btn,
270 &FGRadioStack::set_adf_vol_btn);
271 fgSetArchivable("/radios/adf/volume");
272 fgTie("/radios/adf/ident", this,
273 &FGRadioStack::get_adf_ident_btn,
274 &FGRadioStack::set_adf_ident_btn);
275 fgSetArchivable("/radios/adf/ident");
277 fgTie("/radios/marker-beacon/inner", this,
278 &FGRadioStack::get_inner_blink);
279 fgTie("/radios/marker-beacon/middle", this,
280 &FGRadioStack::get_middle_blink);
281 fgTie("/radios/marker-beacon/outer", this,
282 &FGRadioStack::get_outer_blink);
286 FGRadioStack::unbind ()
288 fgUntie("/radios/comm[0]/frequencies/selected-mhz");
289 fgUntie("/radios/comm[0]/frequencies/standby-mhz");
290 fgUntie("/radios/comm[0]/on");
291 fgUntie("/radios/comm[0]/ident");
293 fgUntie("/radios/comm[1]/frequencies/selected-mhz");
294 fgUntie("/radios/comm[1]/frequencies/standby-mhz");
295 fgUntie("/radios/comm[1]/on");
296 fgUntie("/radios/comm[1]/ident");
298 fgUntie("/radios/nav[0]/frequencies/selected-mhz");
299 fgUntie("/radios/nav[0]/frequencies/standby-mhz");
300 fgUntie("/radios/nav[0]/radials/actual-deg");
301 fgUntie("/radios/nav[0]/radials/selected-deg");
302 fgUntie("/radios/nav[0]/on");
303 fgUntie("/radios/nav[0]/ident");
304 fgUntie("/radios/nav[0]/to-flag");
305 fgUntie("/radios/nav[0]/from-flag");
306 fgUntie("/radios/nav[0]/in-range");
307 fgUntie("/radios/nav[0]/heading-needle-deflection");
308 fgUntie("/radios/nav[0]/gs-needle-deflection");
310 fgUntie("/radios/nav[1]/frequencies/selected-mhz");
311 fgUntie("/radios/nav[1]/frequencies/standby-mhz");
312 fgUntie("/radios/nav[1]/radials/actual-deg");
313 fgUntie("/radios/nav[1]/radials/selected-deg");
314 fgUntie("/radios/nav[1]/on");
315 fgUntie("/radios/nav[1]/ident");
316 fgUntie("/radios/nav[1]/to-flag");
317 fgUntie("/radios/nav[1]/from-flag");
318 fgUntie("/radios/nav[1]/in-range");
319 fgUntie("/radios/nav[1]/heading-needle-deflection");
320 fgUntie("/radios/nav[1]/gs-needle-deflection");
322 fgUntie("/radios/dme/frequencies/selected-khz");
325 fgUntie("/radios/dme/in-range");
326 fgUntie("/radios/dme/distance-nm");
327 fgUntie("/radios/dme/speed-kt");
328 fgUntie("/radios/dme/ete-min");
330 fgUntie("/radios/adf/frequencies/selected-khz");
331 fgUntie("/radios/adf/frequencies/standby-khz");
332 fgUntie("/radios/adf/rotation-deg");
333 fgUntie("/radios/adf/on");
334 fgUntie("/radios/adf/ident");
336 fgUntie("/radios/marker-beacon/inner");
337 fgUntie("/radios/marker-beacon/middle");
338 fgUntie("/radios/marker-beacon/outer");
342 // model standard VOR/DME/TACAN service volumes as per AIM 1-1-8
343 double FGRadioStack::adjustNavRange( double stationElev, double aircraftElev,
344 double nominalRange )
346 // extend out actual usable range to be 1.3x the published safe range
347 const double usability_factor = 1.3;
349 // assumptions we model the standard service volume, plus
350 // ... rather than specifying a cylinder, we model a cone that
351 // contains the cylinder. Then we put an upside down cone on top
352 // to model diminishing returns at too-high altitudes.
354 // altitude difference
355 double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
356 // cout << "aircraft elev = " << aircraftElev * SG_METER_TO_FEET
357 // << " station elev = " << stationElev << endl;
359 if ( nominalRange < 25.0 + SG_EPSILON ) {
360 // Standard Terminal Service Volume
361 return term_tbl->interpolate( alt ) * usability_factor;
362 } else if ( nominalRange < 50.0 + SG_EPSILON ) {
363 // Standard Low Altitude Service Volume
364 // table is based on range of 40, scale to actual range
365 return low_tbl->interpolate( alt ) * nominalRange / 40.0
368 // Standard High Altitude Service Volume
369 // table is based on range of 130, scale to actual range
370 return high_tbl->interpolate( alt ) * nominalRange / 130.0
376 // model standard ILS service volumes as per AIM 1-1-9
377 double FGRadioStack::adjustILSRange( double stationElev, double aircraftElev,
378 double offsetDegrees, double distance )
380 // assumptions we model the standard service volume, plus
382 // altitude difference
383 // double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
384 double offset = fabs( offsetDegrees );
387 return FG_ILS_DEFAULT_RANGE;
388 } else if ( offset < 35 ) {
389 return 10 + (35 - offset) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
390 } else if ( offset < 45 ) {
391 return (45 - offset);
392 } else if ( offset > 170 ) {
393 return FG_ILS_DEFAULT_RANGE;
394 } else if ( offset > 145 ) {
395 return 10 + (offset - 145) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
396 } else if ( offset > 135 ) {
397 return (offset - 135);
404 // Update the various nav values based on position and valid tuned in navs
406 FGRadioStack::update(int dt)
408 double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
409 double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
410 double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
414 Point3D aircraft = sgGeodToCart( Point3D( lon, lat, elev ) );
418 ////////////////////////////////////////////////////////////////////////
420 ////////////////////////////////////////////////////////////////////////
423 station = Point3D( nav1_x, nav1_y, nav1_z );
424 nav1_loc_dist = aircraft.distance3D( station );
427 station = Point3D( nav1_gs_x, nav1_gs_y, nav1_gs_z );
428 nav1_gs_dist = aircraft.distance3D( station );
434 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
435 nav1_loclat, nav1_loclon,
437 // cout << "az1 = " << az1 << " magvar = " << nav1_magvar << endl;
438 nav1_heading = az1 - nav1_magvar;
439 // cout << " heading = " << nav1_heading
440 // << " dist = " << nav1_dist << endl;
443 double offset = nav1_heading - nav1_radial;
444 while ( offset < -180.0 ) { offset += 360.0; }
445 while ( offset > 180.0 ) { offset -= 360.0; }
446 // cout << "ils offset = " << offset << endl;
447 nav1_effective_range = adjustILSRange(nav1_elev, elev, offset,
448 nav1_loc_dist * SG_METER_TO_NM );
450 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
452 // cout << "nav1 range = " << nav1_effective_range
453 // << " (" << nav1_range << ")" << endl;
455 if ( nav1_loc_dist < nav1_effective_range * SG_NM_TO_METER ) {
457 } else if ( nav1_loc_dist < 2 * nav1_effective_range * SG_NM_TO_METER ) {
458 nav1_inrange = sg_random() <
459 ( 2 * nav1_effective_range * SG_NM_TO_METER - nav1_loc_dist ) /
460 (nav1_effective_range * SG_NM_TO_METER);
462 nav1_inrange = false;
466 nav1_radial = nav1_sel_radial;
469 nav1_inrange = false;
470 // cout << "not picking up vor. :-(" << endl;
473 #ifdef ENABLE_AUDIO_SUPPORT
474 if ( nav1_valid && nav1_inrange ) {
475 // play station ident via audio system if on + ident,
476 // otherwise turn it off
477 if ( nav1_vol_btn > 0.1 && nav1_ident_btn ) {
478 FGSimpleSound *sound;
479 sound = globals->get_soundmgr()->find( "nav1-vor-ident" );
480 sound->set_volume( nav1_vol_btn * 0.3 );
481 sound = globals->get_soundmgr()->find( "nav1-dme-ident" );
482 sound->set_volume( nav1_vol_btn * 0.3 );
483 if ( nav1_last_time <
484 globals->get_time_params()->get_cur_time() - 30 ) {
485 nav1_last_time = globals->get_time_params()->get_cur_time();
488 if ( nav1_play_count < 4 ) {
490 if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") ) {
491 globals->get_soundmgr()->play_once( "nav1-vor-ident" );
494 } else if ( nav1_play_count < 5 && nav1_has_dme ) {
496 if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") &&
497 !globals->get_soundmgr()->is_playing("nav1-dme-ident") ) {
498 globals->get_soundmgr()->play_once( "nav1-dme-ident" );
503 globals->get_soundmgr()->stop( "nav1-vor-ident" );
504 globals->get_soundmgr()->stop( "nav1-dme-ident" );
510 ////////////////////////////////////////////////////////////////////////
512 ////////////////////////////////////////////////////////////////////////
515 station = Point3D( nav2_x, nav2_y, nav2_z );
516 nav2_loc_dist = aircraft.distance3D( station );
519 station = Point3D( nav2_gs_x, nav2_gs_y, nav2_gs_z );
520 nav2_gs_dist = aircraft.distance3D( station );
526 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
527 nav2_loclat, nav2_loclon,
529 nav2_heading = az1 - nav2_magvar;
530 // cout << " heading = " << nav2_heading
531 // << " dist = " << nav2_dist << endl;
534 double offset = nav2_heading - nav2_radial;
535 while ( offset < -180.0 ) { offset += 360.0; }
536 while ( offset > 180.0 ) { offset -= 360.0; }
537 // cout << "ils offset = " << offset << endl;
538 nav2_effective_range = adjustILSRange(nav2_elev, elev, offset,
539 nav2_loc_dist * SG_METER_TO_NM );
541 nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
543 // cout << "nav2 range = " << nav2_effective_range
544 // << " (" << nav2_range << ")" << endl;
546 if ( nav2_loc_dist < nav2_effective_range * SG_NM_TO_METER ) {
548 } else if ( nav2_loc_dist < 2 * nav2_effective_range * SG_NM_TO_METER ) {
549 nav2_inrange = sg_random() <
550 ( 2 * nav2_effective_range * SG_NM_TO_METER - nav2_loc_dist ) /
551 (nav2_effective_range * SG_NM_TO_METER);
553 nav2_inrange = false;
557 nav2_radial = nav2_sel_radial;
560 nav2_inrange = false;
561 // cout << "not picking up vor. :-(" << endl;
564 #ifdef ENABLE_AUDIO_SUPPORT
565 if ( nav2_valid && nav2_inrange ) {
566 // play station ident via audio system if on + ident,
567 // otherwise turn it off
568 if ( nav2_vol_btn > 0.1 && nav2_ident_btn ) {
569 FGSimpleSound *sound;
570 sound = globals->get_soundmgr()->find( "nav2-vor-ident" );
571 sound->set_volume( nav2_vol_btn * 0.3 );
572 sound = globals->get_soundmgr()->find( "nav2-dme-ident" );
573 sound->set_volume( nav2_vol_btn * 0.3 );
574 if ( nav2_last_time <
575 globals->get_time_params()->get_cur_time() - 30 ) {
576 nav2_last_time = globals->get_time_params()->get_cur_time();
579 if ( nav2_play_count < 4 ) {
581 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") ) {
582 globals->get_soundmgr()->play_once( "nav2-vor-ident" );
585 } else if ( nav2_play_count < 5 && nav2_has_dme ) {
587 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") &&
588 !globals->get_soundmgr()->is_playing("nav2-dme-ident") ) {
589 globals->get_soundmgr()->play_once( "nav2-dme-ident" );
594 globals->get_soundmgr()->stop( "nav2-vor-ident" );
595 globals->get_soundmgr()->stop( "nav2-dme-ident" );
601 ////////////////////////////////////////////////////////////////////////
603 ////////////////////////////////////////////////////////////////////////
606 station = Point3D( dme_x, dme_y, dme_z );
607 dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM;
608 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
609 if (dme_dist < dme_effective_range * SG_NM_TO_METER) {
611 } else if (dme_dist < 2 * dme_effective_range * SG_NM_TO_METER) {
612 dme_inrange = sg_random() <
613 (2 * dme_effective_range * SG_NM_TO_METER - dme_dist) /
614 (dme_effective_range * SG_NM_TO_METER);
619 SGTimeStamp current_time;
620 station = Point3D( dme_x, dme_y, dme_z );
621 dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM;
622 current_time.stamp();
623 long dMs = (current_time - dme_last_time) / 1000;
624 // Update every second
626 double dDist = dme_dist - dme_prev_dist;
627 dme_spd = fabs((dDist/dMs) * 3600000);
628 // FIXME: the panel should be able to
632 dme_ete = fabs((dme_dist/dme_spd) * 60.0);
633 // FIXME: the panel should be able to
637 dme_prev_dist = dme_dist;
638 dme_last_time.stamp();
648 ////////////////////////////////////////////////////////////////////////
650 ////////////////////////////////////////////////////////////////////////
653 // staightline distance
654 station = Point3D( adf_x, adf_y, adf_z );
655 adf_dist = aircraft.distance3D( station );
658 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
662 // cout << " heading = " << nav2_heading
663 // << " dist = " << nav2_dist << endl;
665 adf_effective_range = kludgeRange(adf_elev, elev, adf_range);
666 if ( adf_dist < adf_effective_range * SG_NM_TO_METER ) {
668 } else if ( adf_dist < 2 * adf_effective_range * SG_NM_TO_METER ) {
669 adf_inrange = sg_random() <
670 ( 2 * adf_effective_range * SG_NM_TO_METER - adf_dist ) /
671 (adf_effective_range * SG_NM_TO_METER);
679 #ifdef ENABLE_AUDIO_SUPPORT
680 if ( adf_valid && adf_inrange ) {
681 // play station ident via audio system if on + ident,
682 // otherwise turn it off
683 if ( adf_vol_btn > 0.1 && adf_ident_btn ) {
684 FGSimpleSound *sound;
685 sound = globals->get_soundmgr()->find( "adf-ident" );
686 sound->set_volume( adf_vol_btn * 0.3 );
688 globals->get_time_params()->get_cur_time() - 30 ) {
689 adf_last_time = globals->get_time_params()->get_cur_time();
692 if ( adf_play_count < 4 ) {
694 if ( !globals->get_soundmgr()->is_playing("adf-ident") ) {
695 globals->get_soundmgr()->play_once( "adf-ident" );
700 globals->get_soundmgr()->stop( "adf-ident" );
705 // marker beacon blinking
706 bool light_on = ( outer_blink || middle_blink || inner_blink );
710 if ( light_on && (current - blink > 400000) ) {
713 } else if ( !light_on && (current - blink > 100000) ) {
718 if ( outer_marker ) {
719 outer_blink = light_on;
724 if ( middle_marker ) {
725 middle_blink = light_on;
727 middle_blink = false;
730 if ( inner_marker ) {
731 inner_blink = light_on;
736 // cout << outer_blink << " " << middle_blink << " " << inner_blink << endl;
740 // Update current nav/adf radio stations based on current postition
741 void FGRadioStack::search()
743 static FGMkrBeacon::fgMkrBeacType last_beacon = FGMkrBeacon::NOBEACON;
745 double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
746 double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
747 double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
749 // FIXME: the panel should handle this
750 // don't worry about overhead for now,
751 // since this is handled only periodically
752 int dme_switch_pos = fgGetInt("/radios/dme/switch-position");
753 if (dme_switch_pos == 0) {
756 } else if (dme_switch_pos == 1) {
757 if (dme_freq != nav1_freq) {
758 dme_freq = nav1_freq;
761 } else if (dme_switch_pos == 3) {
762 if (dme_freq != nav2_freq) {
763 dme_freq = nav2_freq;
771 static string last_nav1_ident = "";
772 static string last_nav2_ident = "";
773 static string last_adf_ident = "";
774 static bool last_nav1_vor = false;
775 static bool last_nav2_vor = false;
777 ////////////////////////////////////////////////////////////////////////
779 ////////////////////////////////////////////////////////////////////////
781 if ( current_ilslist->query( lon, lat, elev, nav1_freq, &ils ) ) {
782 nav1_ident = ils.get_locident();
784 if ( last_nav1_ident != nav1_ident || last_nav1_vor ) {
785 nav1_trans_ident = ils.get_trans_ident();
786 last_nav1_ident = nav1_ident;
787 last_nav1_vor = false;
789 nav1_has_dme = ils.get_has_dme();
790 nav1_has_gs = ils.get_has_gs();
792 nav1_loclon = ils.get_loclon();
793 nav1_loclat = ils.get_loclat();
794 nav1_gslon = ils.get_gslon();
795 nav1_gslat = ils.get_gslat();
796 nav1_elev = ils.get_gselev();
798 nav1_range = FG_ILS_DEFAULT_RANGE;
799 nav1_effective_range = nav1_range;
800 nav1_target_gs = ils.get_gsangle();
801 nav1_radial = ils.get_locheading();
802 while ( nav1_radial < 0.0 ) { nav1_radial += 360.0; }
803 while ( nav1_radial > 360.0 ) { nav1_radial -= 360.0; }
804 nav1_x = ils.get_x();
805 nav1_y = ils.get_y();
806 nav1_z = ils.get_z();
807 nav1_gs_x = ils.get_gs_x();
808 nav1_gs_y = ils.get_gs_y();
809 nav1_gs_z = ils.get_gs_z();
811 #ifdef ENABLE_AUDIO_SUPPORT
812 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
813 globals->get_soundmgr()->remove( "nav1-vor-ident" );
815 FGSimpleSound *sound;
816 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
817 sound->set_volume( 0.3 );
818 globals->get_soundmgr()->add( sound, "nav1-vor-ident" );
820 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
821 globals->get_soundmgr()->remove( "nav1-dme-ident" );
823 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
824 sound->set_volume( 0.3 );
825 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
827 int offset = (int)(sg_random() * 30.0);
828 nav1_play_count = offset / 4;
829 nav1_last_time = globals->get_time_params()->get_cur_time() -
831 // cout << "offset = " << offset << " play_count = "
832 // << nav1_play_count
833 // << " nav1_last_time = " << nav1_last_time
834 // << " current time = "
835 // << globals->get_time_params()->get_cur_time() << endl;
838 // cout << "Found an ils station in range" << endl;
839 // cout << " id = " << ils.get_locident() << endl;
841 } else if ( current_navlist->query( lon, lat, elev, nav1_freq, &nav ) ) {
842 nav1_ident = nav.get_ident();
844 if ( last_nav1_ident != nav1_ident || !last_nav1_vor ) {
845 last_nav1_ident = nav1_ident;
846 last_nav1_vor = true;
847 nav1_trans_ident = nav.get_trans_ident();
849 nav1_has_dme = nav.get_has_dme();
851 nav1_loclon = nav.get_lon();
852 nav1_loclat = nav.get_lat();
853 nav1_elev = nav.get_elev();
854 nav1_magvar = nav.get_magvar();
855 nav1_range = nav.get_range();
856 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
857 nav1_target_gs = 0.0;
858 nav1_radial = nav1_sel_radial;
859 nav1_x = nav.get_x();
860 nav1_y = nav.get_y();
861 nav1_z = nav.get_z();
863 #ifdef ENABLE_AUDIO_SUPPORT
864 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
865 globals->get_soundmgr()->remove( "nav1-vor-ident" );
867 FGSimpleSound *sound;
868 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
869 sound->set_volume( 0.3 );
870 globals->get_soundmgr()->add( sound, "nav1-vor-ident" );
872 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
873 globals->get_soundmgr()->remove( "nav1-dme-ident" );
875 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
876 sound->set_volume( 0.3 );
877 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
879 int offset = (int)(sg_random() * 30.0);
880 nav1_play_count = offset / 4;
881 nav1_last_time = globals->get_time_params()->get_cur_time() -
883 // cout << "offset = " << offset << " play_count = "
884 // << nav1_play_count << " nav1_last_time = "
885 // << nav1_last_time << " current time = "
886 // << globals->get_time_params()->get_cur_time() << endl;
889 // cout << "Found a vor station in range" << endl;
890 // cout << " id = " << nav.get_ident() << endl;
896 nav1_trans_ident = "";
897 last_nav1_ident = "";
898 #ifdef ENABLE_AUDIO_SUPPORT
899 globals->get_soundmgr()->remove( "nav1-vor-ident" );
900 globals->get_soundmgr()->remove( "nav1-dme-ident" );
902 // cout << "not picking up vor1. :-(" << endl;
906 ////////////////////////////////////////////////////////////////////////
908 ////////////////////////////////////////////////////////////////////////
910 if ( current_ilslist->query( lon, lat, elev, nav2_freq, &ils ) ) {
911 nav2_ident = ils.get_locident();
913 if ( last_nav2_ident != nav2_ident || last_nav2_vor ) {
914 last_nav2_ident = nav2_ident;
915 last_nav2_vor = false;
916 nav2_trans_ident = ils.get_trans_ident();
918 nav2_has_dme = ils.get_has_dme();
919 nav2_has_gs = ils.get_has_gs();
921 nav2_loclon = ils.get_loclon();
922 nav2_loclat = ils.get_loclat();
923 nav2_elev = ils.get_gselev();
925 nav2_range = FG_ILS_DEFAULT_RANGE;
926 nav2_effective_range = nav2_range;
927 nav2_target_gs = ils.get_gsangle();
928 nav2_radial = ils.get_locheading();
929 while ( nav2_radial < 0.0 ) { nav2_radial += 360.0; }
930 while ( nav2_radial > 360.0 ) { nav2_radial -= 360.0; }
931 nav2_x = ils.get_x();
932 nav2_y = ils.get_y();
933 nav2_z = ils.get_z();
934 nav2_gs_x = ils.get_gs_x();
935 nav2_gs_y = ils.get_gs_y();
936 nav2_gs_z = ils.get_gs_z();
938 #ifdef ENABLE_AUDIO_SUPPORT
939 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
940 globals->get_soundmgr()->remove( "nav2-vor-ident" );
942 FGSimpleSound *sound;
943 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
944 sound->set_volume( 0.3 );
945 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
947 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
948 globals->get_soundmgr()->remove( "nav2-dme-ident" );
950 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
951 sound->set_volume( 0.3 );
952 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
954 int offset = (int)(sg_random() * 30.0);
955 nav2_play_count = offset / 4;
956 nav2_last_time = globals->get_time_params()->get_cur_time() -
958 // cout << "offset = " << offset << " play_count = "
959 // << nav2_play_count << " nav2_last_time = "
960 // << nav2_last_time << " current time = "
961 // << globals->get_time_params()->get_cur_time() << endl;
964 // cout << "Found an ils station in range" << endl;
965 // cout << " id = " << ils.get_locident() << endl;
967 } else if ( current_navlist->query( lon, lat, elev, nav2_freq, &nav ) ) {
968 nav2_ident = nav.get_ident();
970 if ( last_nav2_ident != nav2_ident || !last_nav2_vor ) {
971 last_nav2_ident = nav2_ident;
972 last_nav2_vor = true;
973 nav2_trans_ident = nav.get_trans_ident();
975 nav2_has_dme = nav.get_has_dme();
976 nav2_has_dme = false;
977 nav2_loclon = nav.get_lon();
978 nav2_loclat = nav.get_lat();
979 nav2_elev = nav.get_elev();
980 nav2_magvar = nav.get_magvar();
981 nav2_range = nav.get_range();
982 nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
983 nav2_target_gs = 0.0;
984 nav2_radial = nav2_sel_radial;
985 nav2_x = nav.get_x();
986 nav2_y = nav.get_y();
987 nav2_z = nav.get_z();
989 #ifdef ENABLE_AUDIO_SUPPORT
990 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
991 globals->get_soundmgr()->remove( "nav2-vor-ident" );
993 FGSimpleSound *sound;
994 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
995 sound->set_volume( 0.3 );
996 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
998 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
999 globals->get_soundmgr()->remove( "nav2-dme-ident" );
1001 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
1002 sound->set_volume( 0.3 );
1003 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
1005 int offset = (int)(sg_random() * 30.0);
1006 nav2_play_count = offset / 4;
1007 nav2_last_time = globals->get_time_params()->get_cur_time() -
1009 // cout << "offset = " << offset << " play_count = "
1010 // << nav2_play_count << " nav2_last_time = "
1011 // << nav2_last_time << " current time = "
1012 // << globals->get_time_params()->get_cur_time() << endl;
1015 // cout << "Found a vor station in range" << endl;
1016 // cout << " id = " << nav.get_ident() << endl;
1022 nav2_trans_ident = "";
1023 last_nav2_ident = "";
1024 #ifdef ENABLE_AUDIO_SUPPORT
1025 globals->get_soundmgr()->remove( "nav2-vor-ident" );
1026 globals->get_soundmgr()->remove( "nav2-dme-ident" );
1028 // cout << "not picking up vor1. :-(" << endl;
1032 ////////////////////////////////////////////////////////////////////////
1034 ////////////////////////////////////////////////////////////////////////
1036 if ( current_ilslist->query( lon, lat, elev, dme_freq, &ils ) ) {
1037 if (ils.get_has_dme()) {
1039 dme_lon = ils.get_loclon();
1040 dme_lat = ils.get_loclat();
1041 dme_elev = ils.get_gselev();
1042 dme_range = FG_ILS_DEFAULT_RANGE;
1043 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
1044 dme_x = ils.get_dme_x();
1045 dme_y = ils.get_dme_y();
1046 dme_z = ils.get_dme_z();
1048 } else if ( current_navlist->query( lon, lat, elev, dme_freq, &nav ) ) {
1049 if (nav.get_has_dme()) {
1051 dme_lon = nav.get_lon();
1052 dme_lat = nav.get_lat();
1053 dme_elev = nav.get_elev();
1054 dme_range = nav.get_range();
1055 dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
1056 dme_x = nav.get_x();
1057 dme_y = nav.get_y();
1058 dme_z = nav.get_z();
1066 ////////////////////////////////////////////////////////////////////////
1068 ////////////////////////////////////////////////////////////////////////
1070 FGMkrBeacon::fgMkrBeacType beacon_type
1071 = current_beacons->query( lon * SGD_RADIANS_TO_DEGREES,
1072 lat * SGD_RADIANS_TO_DEGREES, elev );
1074 outer_marker = middle_marker = inner_marker = false;
1076 if ( beacon_type == FGMkrBeacon::OUTER ) {
1077 outer_marker = true;
1078 // cout << "OUTER MARKER" << endl;
1079 #ifdef ENABLE_AUDIO_SUPPORT
1080 if ( last_beacon != FGMkrBeacon::OUTER ) {
1081 if ( ! globals->get_soundmgr()->exists( "outer-marker" ) ) {
1082 FGSimpleSound *sound = beacon.get_outer();
1083 sound->set_volume( 0.3 );
1084 globals->get_soundmgr()->add( sound, "outer-marker" );
1086 if ( !globals->get_soundmgr()->is_playing("outer-marker") ) {
1087 globals->get_soundmgr()->play_looped( "outer-marker" );
1091 } else if ( beacon_type == FGMkrBeacon::MIDDLE ) {
1092 middle_marker = true;
1093 // cout << "MIDDLE MARKER" << endl;
1094 #ifdef ENABLE_AUDIO_SUPPORT
1095 if ( last_beacon != FGMkrBeacon::MIDDLE ) {
1096 if ( ! globals->get_soundmgr()->exists( "middle-marker" ) ) {
1097 FGSimpleSound *sound = beacon.get_middle();
1098 sound->set_volume( 0.3 );
1099 globals->get_soundmgr()->add( sound, "middle-marker" );
1101 if ( !globals->get_soundmgr()->is_playing("middle-marker") ) {
1102 globals->get_soundmgr()->play_looped( "middle-marker" );
1106 } else if ( beacon_type == FGMkrBeacon::INNER ) {
1107 inner_marker = true;
1108 // cout << "INNER MARKER" << endl;
1109 #ifdef ENABLE_AUDIO_SUPPORT
1110 if ( last_beacon != FGMkrBeacon::INNER ) {
1111 if ( ! globals->get_soundmgr()->exists( "inner-marker" ) ) {
1112 FGSimpleSound *sound = beacon.get_inner();
1113 sound->set_volume( 0.3 );
1114 globals->get_soundmgr()->add( sound, "inner-marker" );
1116 if ( !globals->get_soundmgr()->is_playing("inner-marker") ) {
1117 globals->get_soundmgr()->play_looped( "inner-marker" );
1122 // cout << "no marker" << endl;
1123 #ifdef ENABLE_AUDIO_SUPPORT
1124 globals->get_soundmgr()->stop( "outer-marker" );
1125 globals->get_soundmgr()->stop( "middle-marker" );
1126 globals->get_soundmgr()->stop( "inner-marker" );
1129 last_beacon = beacon_type;
1132 ////////////////////////////////////////////////////////////////////////
1134 ////////////////////////////////////////////////////////////////////////
1136 if ( current_navlist->query( lon, lat, elev, adf_freq, &nav ) ) {
1138 #if defined( _MSC_VER ) || defined(__MINGW32__)
1139 _snprintf( freq, 10, "%.0f", adf_freq );
1141 snprintf( freq, 10, "%.0f", adf_freq );
1144 adf_ident += nav.get_ident();
1145 // cout << "adf ident = " << adf_ident << endl;
1147 if ( last_adf_ident != adf_ident ) {
1148 last_adf_ident = adf_ident;
1150 adf_trans_ident = nav.get_trans_ident();
1151 adf_lon = nav.get_lon();
1152 adf_lat = nav.get_lat();
1153 adf_elev = nav.get_elev();
1154 adf_range = nav.get_range();
1155 adf_effective_range = kludgeRange(adf_elev, elev, adf_range);
1156 adf_x = nav.get_x();
1157 adf_y = nav.get_y();
1158 adf_z = nav.get_z();
1160 #ifdef ENABLE_AUDIO_SUPPORT
1161 if ( globals->get_soundmgr()->exists( "adf-ident" ) ) {
1162 globals->get_soundmgr()->remove( "adf-ident" );
1164 FGSimpleSound *sound;
1165 sound = morse.make_ident( adf_trans_ident, LO_FREQUENCY );
1166 sound->set_volume( 0.3 );
1167 globals->get_soundmgr()->add( sound, "adf-ident" );
1169 int offset = (int)(sg_random() * 30.0);
1170 adf_play_count = offset / 4;
1171 adf_last_time = globals->get_time_params()->get_cur_time() -
1173 // cout << "offset = " << offset << " play_count = "
1174 // << adf_play_count << " adf_last_time = "
1175 // << adf_last_time << " current time = "
1176 // << globals->get_time_params()->get_cur_time() << endl;
1179 // cout << "Found an adf station in range" << endl;
1180 // cout << " id = " << nav.get_ident() << endl;
1185 adf_trans_ident = "";
1186 #ifdef ENABLE_AUDIO_SUPPORT
1187 globals->get_soundmgr()->remove( "adf-ident" );
1189 last_adf_ident = "";
1190 // cout << "not picking up adf. :-(" << endl;
1195 // return the amount of heading needle deflection, returns a value
1196 // clamped to the range of ( -10 , 10 )
1197 double FGRadioStack::get_nav1_heading_needle_deflection() const {
1200 if ( nav1_inrange ) {
1201 r = nav1_heading - nav1_radial;
1202 // cout << "Radial = " << nav1_radial
1203 // << " Bearing = " << nav1_heading << endl;
1205 while ( r > 180.0 ) { r -= 360.0;}
1206 while ( r < -180.0 ) { r += 360.0;}
1207 if ( fabs(r) > 90.0 ) {
1208 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
1214 // According to Robin Peel, the ILS is 4x more sensitive than a vor
1215 if ( nav1_loc ) { r *= 4.0; }
1216 if ( r < -10.0 ) { r = -10.0; }
1217 if ( r > 10.0 ) { r = 10.0; }
1225 // return the amount of heading needle deflection, returns a value
1226 // clamped to the range of ( -10 , 10 )
1227 double FGRadioStack::get_nav2_heading_needle_deflection() const {
1230 if ( nav2_inrange ) {
1231 r = nav2_heading - nav2_radial;
1232 // cout << "Radial = " << nav2_radial
1233 // << " Bearing = " << nav2_heading << endl;
1235 while (r> 180.0) r-=360.0;
1236 while (r<-180.0) r+=360.0;
1237 if ( fabs(r) > 90.0 )
1238 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
1239 // According to Robin Peel, the ILS is 4x more sensitive than a vor
1240 if ( nav2_loc ) r *= 4.0;
1241 if ( r < -10.0 ) r = -10.0;
1242 if ( r > 10.0 ) r = 10.0;
1250 // return the amount of glide slope needle deflection (.i.e. the
1251 // number of degrees we are off the glide slope * 5.0
1252 double FGRadioStack::get_nav1_gs_needle_deflection() const {
1253 if ( nav1_inrange && nav1_has_gs ) {
1254 double x = nav1_gs_dist;
1255 double y = (fgGetDouble("/position/altitude-ft") - nav1_elev)
1257 double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
1258 return (nav1_target_gs - angle) * 5.0;
1265 // return the amount of glide slope needle deflection (.i.e. the
1266 // number of degrees we are off the glide slope * 5.0
1267 double FGRadioStack::get_nav2_gs_needle_deflection() const {
1268 if ( nav2_inrange && nav2_has_gs ) {
1269 double x = nav2_gs_dist;
1270 double y = (fgGetDouble("/position/altitude-ft") - nav2_elev)
1272 double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
1273 return (nav2_target_gs - angle) * 5.0;
1281 * Return true if the NAV1 TO flag should be active.
1284 FGRadioStack::get_nav1_to_flag () const
1287 double offset = fabs(nav1_heading - nav1_radial);
1291 return (offset <= 90.0 || offset >= 270.0);
1299 * Return true if the NAV1 FROM flag should be active.
1302 FGRadioStack::get_nav1_from_flag () const
1305 double offset = fabs(nav1_heading - nav1_radial);
1309 return (offset > 90.0 && offset < 270.0);
1317 * Return true if the NAV2 TO flag should be active.
1320 FGRadioStack::get_nav2_to_flag () const
1323 double offset = fabs(nav2_heading - nav2_radial);
1327 return (offset <= 90.0 || offset >= 270.0);
1335 * Return true if the NAV2 FROM flag should be active.
1338 FGRadioStack::get_nav2_from_flag () const
1341 double offset = fabs(nav2_heading - nav2_radial);
1345 return (offset > 90.0 && offset < 270.0);