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 <simgear/compiler.h>
29 #include <simgear/math/sg_random.h>
31 #include <Aircraft/aircraft.hxx>
32 #include <Navaids/ilslist.hxx>
33 #include <Navaids/mkrbeacons.hxx>
34 #include <Navaids/navlist.hxx>
35 #include <Time/event.hxx>
37 #include "radiostack.hxx"
39 static int nav1_play_count = 0;
40 static int nav2_play_count = 0;
41 static int adf_play_count = 0;
42 static time_t nav1_last_time = 0;
43 static time_t nav2_last_time = 0;
44 static time_t adf_last_time = 0;
47 FGRadioStack *current_radiostack;
51 * Boy, this is ugly! Make the VOR range vary by altitude difference.
53 static double kludgeRange ( double stationElev, double aircraftElev,
56 // Assume that the nominal range (usually
57 // 50nm) applies at a 5,000 ft difference.
59 double factor = ((aircraftElev*SG_METER_TO_FEET) - stationElev) / 5000.0;
60 double range = fabs(nominalRange * factor);
62 // Clamp the range to keep it sane; for
63 // now, never less than 25% or more than
64 // 500% of nominal range.
65 if (range < nominalRange/4.0) {
66 range = nominalRange/4.0;
67 } else if (range > nominalRange*5.0) {
68 range = nominalRange*5.0;
75 // periodic radio station search wrapper
76 static void fgRadioSearch( void ) {
77 current_radiostack->search();
81 FGRadioStack::FGRadioStack() :
82 lon_node(fgGetNode("/position/longitude-deg", true)),
83 lat_node(fgGetNode("/position/latitude-deg", true)),
84 alt_node(fgGetNode("/position/altitude-ft", true)),
91 SGPath path( globals->get_fg_root() );
93 term.append( "Navaids/range.term" );
95 low.append( "Navaids/range.low" );
97 high.append( "Navaids/range.high" );
99 term_tbl = new SGInterpTable( term.str() );
100 low_tbl = new SGInterpTable( low.str() );
101 high_tbl = new SGInterpTable( high.str() );
106 FGRadioStack::~FGRadioStack()
108 unbind(); // FIXME: should be called externally
117 FGRadioStack::init ()
126 // Search radio database once per second
127 global_events.Register( "fgRadioSearch()", fgRadioSearch,
128 fgEVENT::FG_EVENT_READY, 1000);
132 FGRadioStack::bind ()
135 fgTie("/radios/nav[0]/frequencies/selected-mhz", this,
136 &FGRadioStack::get_nav1_freq, &FGRadioStack::set_nav1_freq);
137 fgTie("/radios/nav[0]/standby-mhz", this,
138 &FGRadioStack::get_nav1_alt_freq, &FGRadioStack::set_nav1_alt_freq);
139 fgTie("/radios/nav[0]/radials/selected-deg", this,
140 &FGRadioStack::get_nav1_sel_radial,
141 &FGRadioStack::set_nav1_sel_radial);
142 fgTie("/radios/nav[0]/volume", this,
143 &FGRadioStack::get_nav1_vol_btn,
144 &FGRadioStack::set_nav1_vol_btn);
145 fgTie("/radios/nav[0]/ident", this,
146 &FGRadioStack::get_nav1_ident_btn,
147 &FGRadioStack::set_nav1_ident_btn);
150 fgTie("/radios/nav[0]/radials/actual-deg", this, &FGRadioStack::get_nav1_radial);
151 fgTie("/radios/nav[0]/to-flag", this, &FGRadioStack::get_nav1_to_flag);
152 fgTie("/radios/nav[0]/from-flag", this, &FGRadioStack::get_nav1_from_flag);
153 fgTie("/radios/nav[0]/in-range", this, &FGRadioStack::get_nav1_inrange);
154 fgTie("/radios/nav[0]/dme/distance-nm", this, &FGRadioStack::get_nav1_dme_dist);
155 fgTie("/radios/nav[0]/dme/in-range", this,
156 &FGRadioStack::get_nav1_dme_inrange);
157 fgTie("/radios/nav[0]/heading-needle-deflection", this,
158 &FGRadioStack::get_nav1_heading_needle_deflection);
159 fgTie("/radios/nav[0]/gs-needle-deflection", this,
160 &FGRadioStack::get_nav1_gs_needle_deflection);
163 fgTie("/radios/nav[1]/frequencies/selected-mhz", this,
164 &FGRadioStack::get_nav2_freq, &FGRadioStack::set_nav2_freq);
165 fgTie("/radios/nav[1]/standby-mhz", this,
166 &FGRadioStack::get_nav2_alt_freq, &FGRadioStack::set_nav2_alt_freq);
167 fgTie("/radios/nav[1]/radials/selected-deg", this,
168 &FGRadioStack::get_nav2_sel_radial,
169 &FGRadioStack::set_nav2_sel_radial);
170 fgTie("/radios/nav[1]/volume", this,
171 &FGRadioStack::get_nav2_vol_btn,
172 &FGRadioStack::set_nav2_vol_btn);
173 fgTie("/radios/nav[1]/ident", this,
174 &FGRadioStack::get_nav2_ident_btn,
175 &FGRadioStack::set_nav2_ident_btn);
178 fgTie("/radios/nav[1]/radials/actual-deg", this, &FGRadioStack::get_nav2_radial);
179 fgTie("/radios/nav[1]/to-flag", this, &FGRadioStack::get_nav2_to_flag);
180 fgTie("/radios/nav[1]/from-flag", this, &FGRadioStack::get_nav2_from_flag);
181 fgTie("/radios/nav[1]/in-range", this, &FGRadioStack::get_nav2_inrange);
182 fgTie("/radios/nav[1]/dme/distance-nm", this, &FGRadioStack::get_nav2_dme_dist);
183 fgTie("/radios/nav[1]/dme/in-range", this,
184 &FGRadioStack::get_nav2_dme_inrange);
185 fgTie("/radios/nav[1]/heading-needle-deflection", this,
186 &FGRadioStack::get_nav2_heading_needle_deflection);
187 fgTie("/radios/nav[1]/gs-needle-deflection", this,
188 &FGRadioStack::get_nav2_gs_needle_deflection);
191 fgTie("/radios/adf/frequencies/selected-khz", this,
192 &FGRadioStack::get_adf_freq, &FGRadioStack::set_adf_freq);
193 fgTie("/radios/adf/frequencies/standby-khz", this,
194 &FGRadioStack::get_adf_alt_freq, &FGRadioStack::set_adf_alt_freq);
195 fgTie("/radios/adf/rotation-deg", this,
196 &FGRadioStack::get_adf_rotation, &FGRadioStack::set_adf_rotation);
197 fgTie("/radios/adf/volume", this,
198 &FGRadioStack::get_adf_vol_btn,
199 &FGRadioStack::set_adf_vol_btn);
200 fgTie("/radios/adf/ident", this,
201 &FGRadioStack::get_adf_ident_btn,
202 &FGRadioStack::set_adf_ident_btn);
204 fgTie("/radios/marker-beacon/inner", this,
205 &FGRadioStack::get_inner_blink);
206 fgTie("/radios/marker-beacon/middle", this,
207 &FGRadioStack::get_middle_blink);
208 fgTie("/radios/marker-beacon/outer", this,
209 &FGRadioStack::get_outer_blink);
213 FGRadioStack::unbind ()
215 fgUntie("/radios/nav[0]/frequencies/selected-mhz");
216 fgUntie("/radios/nav[0]/standby-mhz");
217 fgUntie("/radios/nav[0]/radials/actual-deg");
218 fgUntie("/radios/nav[0]/radials/selected-deg");
219 fgUntie("/radios/nav[0]/on");
220 fgUntie("/radios/nav[0]/ident");
221 fgUntie("/radios/nav[0]/to-flag");
222 fgUntie("/radios/nav[0]/from-flag");
223 fgUntie("/radios/nav[0]/in-range");
224 fgUntie("/radios/nav[0]/dme/distance-nm");
225 fgUntie("/radios/nav[0]/dme/in-range");
226 fgUntie("/radios/nav[0]/heading-needle-deflection");
227 fgUntie("/radios/nav[0]/gs-needle-deflection");
229 fgUntie("/radios/nav[1]/frequencies/selected-mhz");
230 fgUntie("/radios/nav[1]/standby-mhz");
231 fgUntie("/radios/nav[1]//radials/actual-deg");
232 fgUntie("/radios/nav[1]/radials/selected-deg");
233 fgUntie("/radios/nav[1]/on");
234 fgUntie("/radios/nav[1]/ident");
235 fgUntie("/radios/nav[1]/to-flag");
236 fgUntie("/radios/nav[1]/from-flag");
237 fgUntie("/radios/nav[1]/in-range");
238 fgUntie("/radios/nav[1]/dme/distance-nm");
239 fgUntie("/radios/nav[1]/dme/in-range");
240 fgUntie("/radios/nav[1]/heading-needle-deflection");
241 fgUntie("/radios/nav[1]/gs-needle-deflection");
243 fgUntie("/radios/adf/frequencies/selected-khz");
244 fgUntie("/radios/adf/frequencies/standby-khz");
245 fgUntie("/radios/adf/rotation-deg");
246 fgUntie("/radios/adf/on");
247 fgUntie("/radios/adf/ident");
249 fgUntie("/radios/marker-beacon/inner");
250 fgUntie("/radios/marker-beacon/middle");
251 fgUntie("/radios/marker-beacon/outer");
255 // model standard VOR/DME/TACAN service volumes as per AIM 1-1-8
256 double FGRadioStack::adjustNavRange( double stationElev, double aircraftElev,
257 double nominalRange )
259 // extend out actual usable range to be 1.3x the published safe range
260 const double usability_factor = 1.3;
262 // assumptions we model the standard service volume, plus
263 // ... rather than specifying a cylinder, we model a cone that
264 // contains the cylinder. Then we put an upside down cone on top
265 // to model diminishing returns at too-high altitudes.
267 // altitude difference
268 double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
269 // cout << "aircraft elev = " << aircraftElev * SG_METER_TO_FEET
270 // << " station elev = " << stationElev << endl;
272 if ( nominalRange < 25.0 + SG_EPSILON ) {
273 // Standard Terminal Service Volume
274 return term_tbl->interpolate( alt ) * usability_factor;
275 } else if ( nominalRange < 50.0 + SG_EPSILON ) {
276 // Standard Low Altitude Service Volume
277 // table is based on range of 40, scale to actual range
278 return low_tbl->interpolate( alt ) * nominalRange / 40.0
281 // Standard High Altitude Service Volume
282 // table is based on range of 130, scale to actual range
283 return high_tbl->interpolate( alt ) * nominalRange / 130.0
289 // model standard ILS service volumes as per AIM 1-1-9
290 double FGRadioStack::adjustILSRange( double stationElev, double aircraftElev,
291 double offsetDegrees, double distance )
293 // assumptions we model the standard service volume, plus
295 // altitude difference
296 // double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
297 double offset = fabs( offsetDegrees );
300 return FG_ILS_DEFAULT_RANGE;
301 } else if ( offset < 35 ) {
302 return 10 + (35 - offset) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
303 } else if ( offset < 45 ) {
304 return (45 - offset);
311 // Update the various nav values based on position and valid tuned in navs
313 FGRadioStack::update()
315 double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
316 double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
317 double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
321 Point3D aircraft = sgGeodToCart( Point3D( lon, lat, elev ) );
326 station = Point3D( nav1_x, nav1_y, nav1_z );
327 nav1_loc_dist = aircraft.distance3D( station );
329 if ( nav1_has_dme ) {
330 // staightline distance
331 station = Point3D( nav1_dme_x, nav1_dme_y, nav1_dme_z );
332 nav1_dme_dist = aircraft.distance3D( station );
338 station = Point3D( nav1_gs_x, nav1_gs_y, nav1_gs_z );
339 nav1_gs_dist = aircraft.distance3D( station );
345 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
346 nav1_loclat, nav1_loclon,
348 // cout << "az1 = " << az1 << " magvar = " << nav1_magvar << endl;
349 nav1_heading = az1 - nav1_magvar;
350 // cout << " heading = " << nav1_heading
351 // << " dist = " << nav1_dist << endl;
354 double offset = nav1_heading - nav1_radial;
355 while ( offset < -180.0 ) { offset += 360.0; }
356 while ( offset > 180.0 ) { offset -= 360.0; }
357 // cout << "ils offset = " << offset << endl;
358 nav1_effective_range = adjustILSRange(nav1_elev, elev, offset,
359 nav1_loc_dist * SG_METER_TO_NM );
361 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
363 // cout << "nav1 range = " << nav1_effective_range
364 // << " (" << nav1_range << ")" << endl;
366 if ( nav1_loc_dist < nav1_effective_range * SG_NM_TO_METER ) {
368 } else if ( nav1_loc_dist < 2 * nav1_effective_range * SG_NM_TO_METER ) {
369 nav1_inrange = sg_random() <
370 ( 2 * nav1_effective_range * SG_NM_TO_METER - nav1_loc_dist ) /
371 (nav1_effective_range * SG_NM_TO_METER);
373 nav1_inrange = false;
377 nav1_radial = nav1_sel_radial;
380 nav1_inrange = false;
382 // cout << "not picking up vor. :-(" << endl;
385 #ifdef ENABLE_AUDIO_SUPPORT
386 if ( nav1_valid && nav1_inrange ) {
387 // play station ident via audio system if on + ident,
388 // otherwise turn it off
389 if ( nav1_vol_btn > 0.1 && nav1_ident_btn ) {
390 FGSimpleSound *sound;
391 sound = globals->get_soundmgr()->find( "nav1-vor-ident" );
392 sound->set_volume( nav1_vol_btn * 0.3 );
393 sound = globals->get_soundmgr()->find( "nav1-dme-ident" );
394 sound->set_volume( nav1_vol_btn * 0.3 );
395 if ( nav1_last_time <
396 globals->get_time_params()->get_cur_time() - 30 ) {
397 nav1_last_time = globals->get_time_params()->get_cur_time();
400 if ( nav1_play_count < 4 ) {
402 if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") ) {
403 globals->get_soundmgr()->play_once( "nav1-vor-ident" );
406 } else if ( nav1_play_count < 5 && nav1_has_dme ) {
408 if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") &&
409 !globals->get_soundmgr()->is_playing("nav1-dme-ident") ) {
410 globals->get_soundmgr()->play_once( "nav1-dme-ident" );
415 globals->get_soundmgr()->stop( "nav1-vor-ident" );
416 globals->get_soundmgr()->stop( "nav1-dme-ident" );
422 station = Point3D( nav2_x, nav2_y, nav2_z );
423 nav2_loc_dist = aircraft.distance3D( station );
425 if ( nav2_has_dme ) {
426 // staightline distance
427 station = Point3D( nav2_dme_x, nav2_dme_y, nav2_dme_z );
428 nav2_dme_dist = aircraft.distance3D( station );
434 station = Point3D( nav2_gs_x, nav2_gs_y, nav2_gs_z );
435 nav2_gs_dist = aircraft.distance3D( station );
441 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
442 nav2_loclat, nav2_loclon,
444 nav2_heading = az1 - nav2_magvar;
445 // cout << " heading = " << nav2_heading
446 // << " dist = " << nav2_dist << endl;
449 double offset = nav2_heading - nav2_radial;
450 while ( offset < -180.0 ) { offset += 360.0; }
451 while ( offset > 180.0 ) { offset -= 360.0; }
452 // cout << "ils offset = " << offset << endl;
453 nav2_effective_range = adjustILSRange(nav2_elev, elev, offset,
454 nav2_loc_dist * SG_METER_TO_NM );
456 nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
458 // cout << "nav2 range = " << nav2_effective_range
459 // << " (" << nav2_range << ")" << endl;
461 if ( nav2_loc_dist < nav2_effective_range * SG_NM_TO_METER ) {
463 } else if ( nav2_loc_dist < 2 * nav2_effective_range * SG_NM_TO_METER ) {
464 nav2_inrange = sg_random() <
465 ( 2 * nav2_effective_range * SG_NM_TO_METER - nav2_loc_dist ) /
466 (nav2_effective_range * SG_NM_TO_METER);
468 nav2_inrange = false;
472 nav2_radial = nav2_sel_radial;
475 nav2_inrange = false;
477 // cout << "not picking up vor. :-(" << endl;
480 #ifdef ENABLE_AUDIO_SUPPORT
481 if ( nav2_valid && nav2_inrange ) {
482 // play station ident via audio system if on + ident,
483 // otherwise turn it off
484 if ( nav2_vol_btn > 0.1 && nav2_ident_btn ) {
485 FGSimpleSound *sound;
486 sound = globals->get_soundmgr()->find( "nav2-vor-ident" );
487 sound->set_volume( nav2_vol_btn * 0.3 );
488 sound = globals->get_soundmgr()->find( "nav2-dme-ident" );
489 sound->set_volume( nav2_vol_btn * 0.3 );
490 if ( nav2_last_time <
491 globals->get_time_params()->get_cur_time() - 30 ) {
492 nav2_last_time = globals->get_time_params()->get_cur_time();
495 if ( nav2_play_count < 4 ) {
497 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") ) {
498 globals->get_soundmgr()->play_once( "nav2-vor-ident" );
501 } else if ( nav2_play_count < 5 && nav2_has_dme ) {
503 if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") &&
504 !globals->get_soundmgr()->is_playing("nav2-dme-ident") ) {
505 globals->get_soundmgr()->play_once( "nav2-dme-ident" );
510 globals->get_soundmgr()->stop( "nav2-vor-ident" );
511 globals->get_soundmgr()->stop( "nav2-dme-ident" );
518 // staightline distance
519 station = Point3D( adf_x, adf_y, adf_z );
520 adf_dist = aircraft.distance3D( station );
523 geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
527 // cout << " heading = " << nav2_heading
528 // << " dist = " << nav2_dist << endl;
530 adf_effective_range = kludgeRange(adf_elev, elev, adf_range);
531 if ( adf_dist < adf_effective_range * SG_NM_TO_METER ) {
533 } else if ( adf_dist < 2 * adf_effective_range * SG_NM_TO_METER ) {
534 adf_inrange = sg_random() <
535 ( 2 * adf_effective_range * SG_NM_TO_METER - adf_dist ) /
536 (adf_effective_range * SG_NM_TO_METER);
544 #ifdef ENABLE_AUDIO_SUPPORT
545 if ( adf_valid && adf_inrange ) {
546 // play station ident via audio system if on + ident,
547 // otherwise turn it off
548 if ( adf_vol_btn > 0.1 && adf_ident_btn ) {
549 FGSimpleSound *sound;
550 sound = globals->get_soundmgr()->find( "adf-ident" );
551 sound->set_volume( adf_vol_btn * 0.3 );
553 globals->get_time_params()->get_cur_time() - 30 ) {
554 adf_last_time = globals->get_time_params()->get_cur_time();
557 if ( adf_play_count < 4 ) {
559 if ( !globals->get_soundmgr()->is_playing("adf-ident") ) {
560 globals->get_soundmgr()->play_once( "adf-ident" );
565 globals->get_soundmgr()->stop( "adf-ident" );
570 // marker beacon blinking
571 bool light_on = ( outer_blink || middle_blink || inner_blink );
575 if ( light_on && (current - blink > 400000) ) {
578 } else if ( !light_on && (current - blink > 100000) ) {
583 if ( outer_marker ) {
584 outer_blink = light_on;
589 if ( middle_marker ) {
590 middle_blink = light_on;
592 middle_blink = false;
595 if ( inner_marker ) {
596 inner_blink = light_on;
601 // cout << outer_blink << " " << middle_blink << " " << inner_blink << endl;
605 // Update current nav/adf radio stations based on current postition
606 void FGRadioStack::search()
608 static FGMkrBeacon::fgMkrBeacType last_beacon = FGMkrBeacon::NOBEACON;
610 double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
611 double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
612 double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
618 static string last_nav1_ident = "";
619 static string last_nav2_ident = "";
620 static string last_adf_ident = "";
621 static bool last_nav1_vor = false;
622 static bool last_nav2_vor = false;
623 if ( current_ilslist->query( lon, lat, elev, nav1_freq, &ils ) ) {
624 nav1_ident = ils.get_locident();
626 if ( last_nav1_ident != nav1_ident || last_nav1_vor ) {
627 nav1_trans_ident = ils.get_trans_ident();
628 last_nav1_ident = nav1_ident;
629 last_nav1_vor = false;
631 nav1_has_dme = ils.get_has_dme();
632 nav1_has_gs = ils.get_has_gs();
634 nav1_loclon = ils.get_loclon();
635 nav1_loclat = ils.get_loclat();
636 nav1_gslon = ils.get_gslon();
637 nav1_gslat = ils.get_gslat();
638 nav1_dmelon = ils.get_dmelon();
639 nav1_dmelat = ils.get_dmelat();
640 nav1_elev = ils.get_gselev();
642 nav1_range = FG_ILS_DEFAULT_RANGE;
643 nav1_effective_range = nav1_range;
644 nav1_target_gs = ils.get_gsangle();
645 nav1_radial = ils.get_locheading();
646 while ( nav1_radial < 0.0 ) { nav1_radial += 360.0; }
647 while ( nav1_radial > 360.0 ) { nav1_radial -= 360.0; }
648 nav1_x = ils.get_x();
649 nav1_y = ils.get_y();
650 nav1_z = ils.get_z();
651 nav1_gs_x = ils.get_gs_x();
652 nav1_gs_y = ils.get_gs_y();
653 nav1_gs_z = ils.get_gs_z();
654 nav1_dme_x = ils.get_dme_x();
655 nav1_dme_y = ils.get_dme_y();
656 nav1_dme_z = ils.get_dme_z();
658 #ifdef ENABLE_AUDIO_SUPPORT
659 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
660 globals->get_soundmgr()->remove( "nav1-vor-ident" );
662 FGSimpleSound *sound;
663 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
664 sound->set_volume( 0.3 );
665 globals->get_soundmgr()->add( sound, "nav1-vor-ident" );
667 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
668 globals->get_soundmgr()->remove( "nav1-dme-ident" );
670 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
671 sound->set_volume( 0.3 );
672 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
674 int offset = (int)(sg_random() * 30.0);
675 nav1_play_count = offset / 4;
676 nav1_last_time = globals->get_time_params()->get_cur_time() -
678 // cout << "offset = " << offset << " play_count = "
679 // << nav1_play_count
680 // << " nav1_last_time = " << nav1_last_time
681 // << " current time = "
682 // << globals->get_time_params()->get_cur_time() << endl;
685 // cout << "Found an ils station in range" << endl;
686 // cout << " id = " << ils.get_locident() << endl;
688 } else if ( current_navlist->query( lon, lat, elev, nav1_freq, &nav ) ) {
689 nav1_ident = nav.get_ident();
691 if ( last_nav1_ident != nav1_ident || !last_nav1_vor ) {
692 last_nav1_ident = nav1_ident;
693 last_nav1_vor = true;
694 nav1_trans_ident = nav.get_trans_ident();
696 nav1_has_dme = nav.get_has_dme();
698 nav1_loclon = nav.get_lon();
699 nav1_loclat = nav.get_lat();
700 nav1_elev = nav.get_elev();
701 nav1_magvar = nav.get_magvar();
702 nav1_range = nav.get_range();
703 nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
704 nav1_target_gs = 0.0;
705 nav1_radial = nav1_sel_radial;
706 nav1_x = nav1_dme_x = nav.get_x();
707 nav1_y = nav1_dme_y = nav.get_y();
708 nav1_z = nav1_dme_z = nav.get_z();
710 #ifdef ENABLE_AUDIO_SUPPORT
711 if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
712 globals->get_soundmgr()->remove( "nav1-vor-ident" );
714 FGSimpleSound *sound;
715 sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
716 sound->set_volume( 0.3 );
717 globals->get_soundmgr()->add( sound, "nav1-vor-ident" );
719 if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
720 globals->get_soundmgr()->remove( "nav1-dme-ident" );
722 sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
723 sound->set_volume( 0.3 );
724 globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
726 int offset = (int)(sg_random() * 30.0);
727 nav1_play_count = offset / 4;
728 nav1_last_time = globals->get_time_params()->get_cur_time() -
730 // cout << "offset = " << offset << " play_count = "
731 // << nav1_play_count << " nav1_last_time = "
732 // << nav1_last_time << " current time = "
733 // << globals->get_time_params()->get_cur_time() << endl;
736 // cout << "Found a vor station in range" << endl;
737 // cout << " id = " << nav.get_ident() << endl;
744 nav1_trans_ident = "";
745 last_nav1_ident = "";
746 #ifdef ENABLE_AUDIO_SUPPORT
747 globals->get_soundmgr()->remove( "nav1-vor-ident" );
748 globals->get_soundmgr()->remove( "nav1-dme-ident" );
750 // cout << "not picking up vor1. :-(" << endl;
753 if ( current_ilslist->query( lon, lat, elev, nav2_freq, &ils ) ) {
754 nav2_ident = ils.get_locident();
756 if ( last_nav2_ident != nav2_ident || last_nav2_vor ) {
757 last_nav2_ident = nav2_ident;
758 last_nav2_vor = false;
759 nav2_trans_ident = ils.get_trans_ident();
761 nav2_has_dme = ils.get_has_dme();
762 nav2_has_gs = ils.get_has_gs();
764 nav2_loclon = ils.get_loclon();
765 nav2_loclat = ils.get_loclat();
766 nav2_elev = ils.get_gselev();
768 nav2_range = FG_ILS_DEFAULT_RANGE;
769 nav2_effective_range = nav2_range;
770 nav2_target_gs = ils.get_gsangle();
771 nav2_radial = ils.get_locheading();
772 while ( nav2_radial < 0.0 ) { nav2_radial += 360.0; }
773 while ( nav2_radial > 360.0 ) { nav2_radial -= 360.0; }
774 nav2_x = ils.get_x();
775 nav2_y = ils.get_y();
776 nav2_z = ils.get_z();
777 nav2_gs_x = ils.get_gs_x();
778 nav2_gs_y = ils.get_gs_y();
779 nav2_gs_z = ils.get_gs_z();
780 nav2_dme_x = ils.get_dme_x();
781 nav2_dme_y = ils.get_dme_y();
782 nav2_dme_z = ils.get_dme_z();
784 #ifdef ENABLE_AUDIO_SUPPORT
785 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
786 globals->get_soundmgr()->remove( "nav2-vor-ident" );
788 FGSimpleSound *sound;
789 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
790 sound->set_volume( 0.3 );
791 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
793 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
794 globals->get_soundmgr()->remove( "nav2-dme-ident" );
796 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
797 sound->set_volume( 0.3 );
798 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
800 int offset = (int)(sg_random() * 30.0);
801 nav2_play_count = offset / 4;
802 nav2_last_time = globals->get_time_params()->get_cur_time() -
804 // cout << "offset = " << offset << " play_count = "
805 // << nav2_play_count << " nav2_last_time = "
806 // << nav2_last_time << " current time = "
807 // << globals->get_time_params()->get_cur_time() << endl;
810 // cout << "Found an ils station in range" << endl;
811 // cout << " id = " << ils.get_locident() << endl;
813 } else if ( current_navlist->query( lon, lat, elev, nav2_freq, &nav ) ) {
814 nav2_ident = nav.get_ident();
816 if ( last_nav2_ident != nav2_ident || !last_nav2_vor ) {
817 last_nav2_ident = nav2_ident;
818 last_nav2_vor = true;
819 nav2_trans_ident = nav.get_trans_ident();
821 nav2_has_dme = nav.get_has_dme();
822 nav2_has_dme = false;
823 nav2_loclon = nav.get_lon();
824 nav2_loclat = nav.get_lat();
825 nav2_elev = nav.get_elev();
826 nav2_magvar = nav.get_magvar();
827 nav2_range = nav.get_range();
828 nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
829 nav2_target_gs = 0.0;
830 nav2_radial = nav2_sel_radial;
831 nav2_x = nav2_dme_x = nav.get_x();
832 nav2_y = nav2_dme_y = nav.get_y();
833 nav2_z = nav2_dme_z = nav.get_z();
835 #ifdef ENABLE_AUDIO_SUPPORT
836 if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
837 globals->get_soundmgr()->remove( "nav2-vor-ident" );
839 FGSimpleSound *sound;
840 sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
841 sound->set_volume( 0.3 );
842 globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
844 if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
845 globals->get_soundmgr()->remove( "nav2-dme-ident" );
847 sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
848 sound->set_volume( 0.3 );
849 globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
851 int offset = (int)(sg_random() * 30.0);
852 nav2_play_count = offset / 4;
853 nav2_last_time = globals->get_time_params()->get_cur_time() -
855 // cout << "offset = " << offset << " play_count = "
856 // << nav2_play_count << " nav2_last_time = "
857 // << nav2_last_time << " current time = "
858 // << globals->get_time_params()->get_cur_time() << endl;
861 // cout << "Found a vor station in range" << endl;
862 // cout << " id = " << nav.get_ident() << endl;
869 nav2_trans_ident = "";
870 last_nav2_ident = "";
871 #ifdef ENABLE_AUDIO_SUPPORT
872 globals->get_soundmgr()->remove( "nav2-vor-ident" );
873 globals->get_soundmgr()->remove( "nav2-dme-ident" );
875 // cout << "not picking up vor1. :-(" << endl;
878 FGMkrBeacon::fgMkrBeacType beacon_type
879 = current_beacons->query( lon * SGD_RADIANS_TO_DEGREES,
880 lat * SGD_RADIANS_TO_DEGREES, elev );
882 outer_marker = middle_marker = inner_marker = false;
884 if ( beacon_type == FGMkrBeacon::OUTER ) {
886 // cout << "OUTER MARKER" << endl;
887 #ifdef ENABLE_AUDIO_SUPPORT
888 if ( last_beacon != FGMkrBeacon::OUTER ) {
889 if ( ! globals->get_soundmgr()->exists( "outer-marker" ) ) {
890 FGSimpleSound *sound = beacon.get_outer();
891 sound->set_volume( 0.3 );
892 globals->get_soundmgr()->add( sound, "outer-marker" );
894 if ( !globals->get_soundmgr()->is_playing("outer-marker") ) {
895 globals->get_soundmgr()->play_looped( "outer-marker" );
899 } else if ( beacon_type == FGMkrBeacon::MIDDLE ) {
900 middle_marker = true;
901 // cout << "MIDDLE MARKER" << endl;
902 #ifdef ENABLE_AUDIO_SUPPORT
903 if ( last_beacon != FGMkrBeacon::MIDDLE ) {
904 if ( ! globals->get_soundmgr()->exists( "middle-marker" ) ) {
905 FGSimpleSound *sound = beacon.get_middle();
906 sound->set_volume( 0.3 );
907 globals->get_soundmgr()->add( sound, "middle-marker" );
909 if ( !globals->get_soundmgr()->is_playing("middle-marker") ) {
910 globals->get_soundmgr()->play_looped( "middle-marker" );
914 } else if ( beacon_type == FGMkrBeacon::INNER ) {
916 // cout << "INNER MARKER" << endl;
917 #ifdef ENABLE_AUDIO_SUPPORT
918 if ( last_beacon != FGMkrBeacon::INNER ) {
919 if ( ! globals->get_soundmgr()->exists( "inner-marker" ) ) {
920 FGSimpleSound *sound = beacon.get_inner();
921 sound->set_volume( 0.3 );
922 globals->get_soundmgr()->add( sound, "inner-marker" );
924 if ( !globals->get_soundmgr()->is_playing("inner-marker") ) {
925 globals->get_soundmgr()->play_looped( "inner-marker" );
930 // cout << "no marker" << endl;
931 #ifdef ENABLE_AUDIO_SUPPORT
932 globals->get_soundmgr()->stop( "outer-marker" );
933 globals->get_soundmgr()->stop( "middle-marker" );
934 globals->get_soundmgr()->stop( "inner-marker" );
937 last_beacon = beacon_type;
940 if ( current_navlist->query( lon, lat, elev, adf_freq, &nav ) ) {
942 #if defined( _MSC_VER )
943 _snprintf( freq, 10, "%.0f", adf_freq );
945 snprintf( freq, 10, "%.0f", adf_freq );
948 adf_ident += nav.get_ident();
949 // cout << "adf ident = " << adf_ident << endl;
951 if ( last_adf_ident != adf_ident ) {
952 last_adf_ident = adf_ident;
954 adf_trans_ident = nav.get_trans_ident();
955 adf_lon = nav.get_lon();
956 adf_lat = nav.get_lat();
957 adf_elev = nav.get_elev();
958 adf_range = nav.get_range();
959 adf_effective_range = kludgeRange(adf_elev, elev, adf_range);
964 #ifdef ENABLE_AUDIO_SUPPORT
965 if ( globals->get_soundmgr()->exists( "adf-ident" ) ) {
966 globals->get_soundmgr()->remove( "adf-ident" );
968 FGSimpleSound *sound;
969 sound = morse.make_ident( adf_trans_ident, LO_FREQUENCY );
970 sound->set_volume( 0.3 );
971 globals->get_soundmgr()->add( sound, "adf-ident" );
973 int offset = (int)(sg_random() * 30.0);
974 adf_play_count = offset / 4;
975 adf_last_time = globals->get_time_params()->get_cur_time() -
977 // cout << "offset = " << offset << " play_count = "
978 // << adf_play_count << " adf_last_time = "
979 // << adf_last_time << " current time = "
980 // << globals->get_time_params()->get_cur_time() << endl;
983 // cout << "Found an adf station in range" << endl;
984 // cout << " id = " << nav.get_ident() << endl;
989 adf_trans_ident = "";
990 #ifdef ENABLE_AUDIO_SUPPORT
991 globals->get_soundmgr()->remove( "adf-ident" );
994 // cout << "not picking up adf. :-(" << endl;
999 // return the amount of heading needle deflection, returns a value
1000 // clamped to the range of ( -10 , 10 )
1001 double FGRadioStack::get_nav1_heading_needle_deflection() const {
1004 if ( nav1_inrange ) {
1005 r = nav1_heading - nav1_radial;
1006 // cout << "Radial = " << nav1_radial
1007 // << " Bearing = " << nav1_heading << endl;
1009 while ( r > 180.0 ) { r -= 360.0;}
1010 while ( r < -180.0 ) { r += 360.0;}
1011 if ( fabs(r) > 90.0 ) {
1012 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
1018 // According to Robin Peel, the ILS is 4x more sensitive than a vor
1019 if ( nav1_loc ) { r *= 4.0; }
1020 if ( r < -10.0 ) { r = -10.0; }
1021 if ( r > 10.0 ) { r = 10.0; }
1029 // return the amount of heading needle deflection, returns a value
1030 // clamped to the range of ( -10 , 10 )
1031 double FGRadioStack::get_nav2_heading_needle_deflection() const {
1034 if ( nav2_inrange ) {
1035 r = nav2_heading - nav2_radial;
1036 // cout << "Radial = " << nav2_radial
1037 // << " Bearing = " << nav2_heading << endl;
1039 while (r> 180.0) r-=360.0;
1040 while (r<-180.0) r+=360.0;
1041 if ( fabs(r) > 90.0 )
1042 r = ( r<0.0 ? -r-180.0 : -r+180.0 );
1043 // According to Robin Peel, the ILS is 4x more sensitive than a vor
1044 if ( nav2_loc ) r *= 4.0;
1045 if ( r < -10.0 ) r = -10.0;
1046 if ( r > 10.0 ) r = 10.0;
1054 // return the amount of glide slope needle deflection (.i.e. the
1055 // number of degrees we are off the glide slope * 5.0
1056 double FGRadioStack::get_nav1_gs_needle_deflection() const {
1057 if ( nav1_inrange && nav1_has_gs ) {
1058 double x = nav1_gs_dist;
1059 double y = (fgGetDouble("/position/altitude-ft") - nav1_elev)
1061 double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
1062 return (nav1_target_gs - angle) * 5.0;
1069 // return the amount of glide slope needle deflection (.i.e. the
1070 // number of degrees we are off the glide slope * 5.0
1071 double FGRadioStack::get_nav2_gs_needle_deflection() const {
1072 if ( nav2_inrange && nav2_has_gs ) {
1073 double x = nav2_gs_dist;
1074 double y = (fgGetDouble("/position/altitude-ft") - nav2_elev)
1076 double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
1077 return (nav2_target_gs - angle) * 5.0;
1085 * Return true if the NAV1 TO flag should be active.
1088 FGRadioStack::get_nav1_to_flag () const
1091 double offset = fabs(nav1_heading - nav1_radial);
1095 return (offset <= 90.0 || offset >= 270.0);
1103 * Return true if the NAV1 FROM flag should be active.
1106 FGRadioStack::get_nav1_from_flag () const
1109 double offset = fabs(nav1_heading - nav1_radial);
1113 return (offset > 90.0 && offset < 270.0);
1121 * Return true if the NAV2 TO flag should be active.
1124 FGRadioStack::get_nav2_to_flag () const
1127 double offset = fabs(nav2_heading - nav2_radial);
1131 return (offset <= 90.0 || offset >= 270.0);
1139 * Return true if the NAV2 FROM flag should be active.
1142 FGRadioStack::get_nav2_from_flag () const
1145 double offset = fabs(nav2_heading - nav2_radial);
1149 return (offset > 90.0 && offset < 270.0);