1 // main.cxx -- top level sim routines
3 // Written by Curtis Olson, started May 1997.
5 // Copyright (C) 1997 - 2002 Curtis L. Olson - http://www.flightgear.org/~curt
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
28 #include <simgear/compiler.h>
30 #if defined(__linux__) && defined(__i386__)
31 # include <fpu_control.h>
37 #include <plib/netSocket.h>
40 #include <osg/GraphicsContext>
41 #include <osgDB/Registry>
44 #include <simgear/ephemeris/ephemeris.hxx>
45 #include <simgear/scene/model/modellib.hxx>
46 #include <simgear/scene/material/matlib.hxx>
47 #include <simgear/scene/model/animation.hxx>
48 #include <simgear/scene/sky/sky.hxx>
49 #include <simgear/structure/event_mgr.hxx>
50 #include <simgear/props/props.hxx>
51 #include <simgear/timing/sg_time.hxx>
52 #include <simgear/math/sg_random.h>
54 #include <Time/light.hxx>
55 #include <Include/general.hxx>
56 #include <Aircraft/replay.hxx>
57 #include <Cockpit/cockpit.hxx>
58 #include <Cockpit/hud.hxx>
59 #include <Model/panelnode.hxx>
60 #include <Model/modelmgr.hxx>
61 #include <Model/acmodel.hxx>
62 #include <Scenery/scenery.hxx>
63 #include <Scenery/tilemgr.hxx>
64 #include <Sound/fg_fx.hxx>
65 #include <Sound/beacon.hxx>
66 #include <Sound/morse.hxx>
67 #include <Sound/fg_fx.hxx>
68 #include <FDM/flight.hxx>
69 #include <ATCDCL/ATCmgr.hxx>
70 #include <ATCDCL/AIMgr.hxx>
71 #include <Time/tmp.hxx>
72 #include <Environment/environment_mgr.hxx>
73 #include <GUI/new_gui.hxx>
74 #include <MultiPlayer/multiplaymgr.hxx>
76 #include "CameraGroup.hxx"
77 #include "fg_commands.hxx"
79 #include "renderer.hxx"
83 #include "fg_init.hxx"
85 #include "WindowSystemAdapter.hxx"
86 #include <Main/viewer.hxx>
88 static double real_delta_time_sec = 0.0;
89 double delta_time_sec = 0.0;
91 using namespace flightgear;
95 // This is a record containing a bit of global housekeeping information
98 // Specify our current idle function state. This is used to run all
99 // our initializations out of the idle callback so that we can get a
100 // splash screen up and running right away.
102 long global_multi_loop;
104 SGTimeStamp last_time_stamp;
105 SGTimeStamp current_time_stamp;
107 void fgSetNewSoundDevice(const char *);
109 // The atexit() function handler should know when the graphical subsystem
111 extern int _bootstrap_OSInit;
115 // Update internal time dependent calculations (i.e. flight model)
116 // FIXME: this distinction is obsolete; all subsystems now get delta
118 void fgUpdateTimeDepCalcs() {
119 static bool inited = false;
121 static const SGPropertyNode *replay_state
122 = fgGetNode( "/sim/freeze/replay-state", true );
123 static SGPropertyNode *replay_time
124 = fgGetNode( "/sim/replay/time", true );
125 // static const SGPropertyNode *replay_end_time
126 // = fgGetNode( "/sim/replay/end-time", true );
128 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
130 // Initialize the FDM here if it hasn't been and if we have a
131 // scenery elevation hit.
133 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
134 // << " cur_elev = " << scenery.get_cur_elev() << endl;
136 if (!cur_fdm_state->get_inited()) {
137 // Check for scenery around the aircraft.
138 double lon = fgGetDouble("/sim/presets/longitude-deg");
139 double lat = fgGetDouble("/sim/presets/latitude-deg");
140 // We require just to have 50 meter scenery availabe around
142 double range = 1000.0;
143 SGGeod geod = SGGeod::fromDeg(lon, lat);
144 if (globals->get_scenery()->scenery_available(geod, range)) {
145 //SG_LOG(SG_FLIGHT, SG_INFO, "Finally initializing fdm");
146 cur_fdm_state->init();
147 if ( cur_fdm_state->get_bound() ) {
148 cur_fdm_state->unbind();
150 cur_fdm_state->bind();
154 // conceptually, the following block could be done for each fdm
156 if ( cur_fdm_state->get_inited() ) {
157 // we have been inited, and we are good to go ...
159 if ( replay_state->getIntValue() == 0 ) {
160 // replay off, run fdm
161 cur_fdm_state->update( delta_time_sec );
163 FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
164 r->replay( replay_time->getDoubleValue() );
165 if ( replay_state->getIntValue() == 1 ) {
167 replay_time->setDoubleValue( replay_time->getDoubleValue()
169 * fgGetInt("/sim/speed-up") ) );
170 } else if ( replay_state->getIntValue() == 2 ) {
171 // paused playback (don't advance replay time)
177 fgSetBool("/sim/signals/fdm-initialized", true);
181 // do nothing, fdm isn't inited yet
184 globals->get_aircraft_model()->update(delta_time_sec);
186 // Update solar system
187 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
188 globals->get_time_params()->getLst(),
189 cur_fdm_state->get_Latitude() );
194 // What should we do when we have nothing else to do? Let's get ready
195 // for the next move and update the display?
196 static void fgMainLoop( void ) {
197 int model_hz = fgGetInt("/sim/model-hz");
199 static SGConstPropertyNode_ptr longitude
200 = fgGetNode("/position/longitude-deg");
201 static SGConstPropertyNode_ptr latitude
202 = fgGetNode("/position/latitude-deg");
203 static SGConstPropertyNode_ptr altitude
204 = fgGetNode("/position/altitude-ft");
205 static SGConstPropertyNode_ptr vn_fps
206 = fgGetNode("/velocities/speed-north-fps");
207 static SGConstPropertyNode_ptr ve_fps
208 = fgGetNode("/velocities/speed-east-fps");
209 static SGConstPropertyNode_ptr vd_fps
210 = fgGetNode("/velocities/speed-down-fps");
211 static SGConstPropertyNode_ptr clock_freeze
212 = fgGetNode("/sim/freeze/clock", true);
213 static SGConstPropertyNode_ptr cur_time_override
214 = fgGetNode("/sim/time/cur-time-override", true);
215 static SGConstPropertyNode_ptr max_simtime_per_frame
216 = fgGetNode("/sim/max-simtime-per-frame", true);
217 static SGPropertyNode_ptr frame_signal
218 = fgGetNode("/sim/signals/frame", true);
220 frame_signal->fireValueChanged();
221 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
223 bool scenery_loaded = fgGetBool("sim/sceneryloaded");
224 bool wait_for_scenery = !(scenery_loaded || fgGetBool("sim/sceneryloaded-override"));
226 // Update the elapsed time.
227 static bool first_time = true;
229 last_time_stamp.stamp();
233 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
234 if ( throttle_hz > 0.0 && !wait_for_scenery ) {
235 // optionally throttle the frame rate (to get consistent frame
236 // rates or reduce cpu usage.
238 double frame_us = 1000000.0 / throttle_hz;
240 #define FG_SLEEP_BASED_TIMING 1
241 #if defined(FG_SLEEP_BASED_TIMING)
242 // sleep based timing loop.
244 // Calling sleep, even usleep() on linux is less accurate than
245 // we like, but it does free up the cpu for other tasks during
246 // the sleep so it is desirable. Because of the way sleep()
247 // is implemented in consumer operating systems like windows
248 // and linux, you almost always sleep a little longer than the
251 // To combat the problem of sleeping too long, we calculate the
252 // desired wait time and shorten it by 2000us (2ms) to avoid
253 // [hopefully] over-sleep'ing. The 2ms value was arrived at
254 // via experimentation. We follow this up at the end with a
255 // simple busy-wait loop to get the final pause timing exactly
258 // Assuming we don't oversleep by more than 2000us, this
259 // should be a reasonable compromise between sleep based
260 // waiting, and busy waiting.
262 // sleep() will always overshoot by a bit so undersleep by
263 // 2000us in the hopes of never oversleeping.
265 if ( frame_us < 0.0 ) {
268 current_time_stamp.stamp();
270 double elapsed_us = (current_time_stamp - last_time_stamp).toUSecs();
271 if ( elapsed_us < frame_us ) {
272 double requested_us = frame_us - elapsed_us;
273 ulMilliSecondSleep ( (int)(requested_us / 1000.0) ) ;
277 // busy wait timing loop.
279 // This yields the most accurate timing. If the previous
280 // ulMilliSecondSleep() call is omitted this will peg the cpu
281 // (which is just fine if FG is the only app you care about.)
282 current_time_stamp.stamp();
283 SGTimeStamp next_time_stamp = last_time_stamp;
284 next_time_stamp += SGTimeStamp::fromSec(1e-6*frame_us);
285 while ( current_time_stamp < next_time_stamp ) {
286 current_time_stamp.stamp();
289 // run as fast as the app will go
290 current_time_stamp.stamp();
293 real_delta_time_sec = (current_time_stamp - last_time_stamp).toSecs();
295 // Limit the time we need to spend in simulation loops
296 // That means, if the /sim/max-simtime-per-frame value is strictly positive
297 // you can limit the maximum amount of time you will do simulations for
298 // one frame to display. The cpu time spent in simulations code is roughly
299 // at least O(real_delta_time_sec). If this is (due to running debug
300 // builds or valgrind or something different blowing up execution times)
301 // larger than the real time you will no longer get any response
302 // from flightgear. This limits that effect. Just set to property from
303 // your .fgfsrc or commandline ...
304 double dtMax = max_simtime_per_frame->getDoubleValue();
305 if (0 < dtMax && dtMax < real_delta_time_sec)
306 real_delta_time_sec = dtMax;
308 // round the real time down to a multiple of 1/model-hz.
309 // this way all systems are updated the _same_ amount of dt.
310 static double reminder = 0.0;
311 real_delta_time_sec += reminder;
312 global_multi_loop = long(floor(real_delta_time_sec*model_hz));
313 global_multi_loop = SGMisc<long>::max(0, global_multi_loop);
314 reminder = real_delta_time_sec - double(global_multi_loop)/double(model_hz);
315 real_delta_time_sec = double(global_multi_loop)/double(model_hz);
317 if (clock_freeze->getBoolValue() || wait_for_scenery) {
320 delta_time_sec = real_delta_time_sec;
322 last_time_stamp = current_time_stamp;
323 globals->inc_sim_time_sec( delta_time_sec );
325 // These are useful, especially for Nasal scripts.
326 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
327 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
329 #ifdef FANCY_FRAME_COUNTER
333 static time_t last_time = 0;
334 static int frames = 0;
335 #endif // FANCY_FRAME_COUNTER
337 SGTime *t = globals->get_time_params();
339 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
340 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
342 // Fix elevation. I'm just sticking this here for now, it should
343 // probably move eventually
345 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
346 scenery.get_cur_elev(),
347 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
348 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
350 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
351 scenery.get_cur_elev(),
352 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
353 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
355 // cout << "Warp = " << globals->get_warp() << endl;
358 static bool last_clock_freeze = false;
360 if ( clock_freeze->getBoolValue() ) {
361 // clock freeze requested
362 if ( cur_time_override->getLongValue() == 0 ) {
363 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
364 globals->set_warp( 0 );
367 // no clock freeze requested
368 if ( last_clock_freeze == true ) {
369 // clock just unfroze, let's set warp as the difference
370 // between frozen time and current time so we don't get a
371 // time jump (and corresponding sky object and lighting
373 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
374 fgSetLong( "/sim/time/cur-time-override", 0 );
376 if ( globals->get_warp_delta() != 0 ) {
377 globals->inc_warp( globals->get_warp_delta() );
381 last_clock_freeze = clock_freeze->getBoolValue();
383 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
384 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
385 cur_time_override->getLongValue(),
386 globals->get_warp() );
388 if (globals->get_warp_delta() != 0) {
389 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
393 // update magvar model
394 globals->get_mag()->update( longitude->getDoubleValue()
395 * SGD_DEGREES_TO_RADIANS,
396 latitude->getDoubleValue()
397 * SGD_DEGREES_TO_RADIANS,
398 altitude->getDoubleValue() * SG_FEET_TO_METER,
399 globals->get_time_params()->getJD() );
401 // Calculate frame rate average
402 #ifdef FANCY_FRAME_COUNTER
403 /* old fps calculation */
407 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
408 tmp = general.get_frame(i);
410 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
411 general.set_frame(i+1,tmp);
413 tmp = 1000000.0 / (float)elapsed;
414 general.set_frame(0,tmp);
415 // printf("frame[0] = %.2f\n", general.frames[0]);
417 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
418 // printf("ave = %.2f\n", general.frame_rate);
421 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
422 general.set_frame_rate( frames );
423 fgSetInt("/sim/frame-rate", frames);
424 SG_LOG( SG_ALL, SG_DEBUG,
425 "--> Frame rate is = " << general.get_frame_rate() );
428 last_time = t->get_cur_time();
432 // Update any multiplayer's network queues, the AIMultiplayer
433 // implementation is an AI model and depends on that
434 globals->get_multiplayer_mgr()->Update();
437 if (fgGetBool("/sim/atc/enabled"))
438 globals->get_ATC_mgr()->update(delta_time_sec);
440 // Run the AI subsystem
441 // FIXME: run that also if we have multiplaying enabled since the
442 // multiplayer information is interpreted by an AI model
443 if (fgGetBool("/sim/ai-traffic/enabled"))
444 globals->get_AI_mgr()->update(delta_time_sec);
447 if (0 < global_multi_loop) {
448 // first run the flight model each frame until it is initialized
449 // then continue running each frame only after initial scenery
451 fgUpdateTimeDepCalcs();
453 SG_LOG( SG_ALL, SG_DEBUG,
454 "Elapsed time is zero ... we're zinging" );
457 globals->get_subsystem_mgr()->update(delta_time_sec);
460 // Tile Manager updates - see if we need to load any new scenery tiles.
461 // this code ties together the fdm, viewer and scenery classes...
462 // we may want to move this to its own class at some point
464 double visibility_meters = fgGetDouble("/environment/visibility-m");
465 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
467 // update tile manager for view...
468 SGVec3d viewPos = globals->get_current_view()->get_view_pos();
469 SGGeod geodViewPos = SGGeod::fromCart(viewPos);
470 globals->get_tile_mgr()->update(geodViewPos, visibility_meters);
472 // run Nasal's settimer() loops right before the view manager
473 globals->get_event_mgr()->update(delta_time_sec);
475 // pick up model coordidnates that Nasal code may have set relative to the
477 globals->get_model_mgr()->update(delta_time_sec);
479 // update the view angle as late as possible, but before sound calculations
480 globals->get_viewmgr()->update(real_delta_time_sec);
482 // Update the sound manager last so it can use the CPU while the GPU
483 // is processing the scenery (doubled the frame-rate for me) -EMH-
484 #ifdef ENABLE_AUDIO_SUPPORT
485 static SGPropertyNode *sound_enabled = fgGetNode("/sim/sound/enabled");
486 static SGSoundMgr *smgr = globals->get_soundmgr();
487 static bool smgr_enabled = true;
488 if (smgr_enabled != sound_enabled->getBoolValue()) {
489 if (smgr_enabled == true) { // request to suspend
494 smgr_enabled = sound_enabled->getBoolValue();
497 if (smgr_enabled == true) {
498 static SGPropertyNode *volume = fgGetNode("/sim/sound/volume");
499 smgr->set_volume(volume->getFloatValue());
500 smgr->update(delta_time_sec);
504 // END Tile Manager udpates
506 if (!scenery_loaded && globals->get_tile_mgr()->isSceneryLoaded()
507 && cur_fdm_state->get_inited()) {
508 fgSetBool("sim/sceneryloaded",true);
509 if (fgGetBool("/sim/sound/working")) {
514 globals->get_props()->tie("/sim/sound/devices/name",
515 SGRawValueFunctions<const char *>(0, fgSetNewSoundDevice), false);
520 SG_LOG( SG_ALL, SG_DEBUG, "" );
523 void fgSetNewSoundDevice(const char *device)
525 globals->get_soundmgr()->suspend();
526 globals->get_soundmgr()->stop();
527 globals->get_soundmgr()->init(device);
528 globals->get_soundmgr()->resume();
531 // Operation for querying OpenGL parameters. This must be done in a
532 // valid OpenGL context, potentially in another thread.
535 struct GeneralInitOperation : public GraphicsContextOperation
537 GeneralInitOperation()
538 : GraphicsContextOperation(std::string("General init"))
541 void run(osg::GraphicsContext* gc)
543 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
544 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
545 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
546 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
549 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
550 general.set_glMaxTexSize( tmp );
551 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
553 glGetIntegerv( GL_DEPTH_BITS, &tmp );
554 general.set_glDepthBits( tmp );
555 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
560 // This is the top level master main function that is registered as
563 // The first few passes take care of initialization things (a couple
564 // per pass) and once everything has been initialized fgMainLoop from
567 static void fgIdleFunction ( void ) {
568 static osg::ref_ptr<GeneralInitOperation> genOp;
569 if ( idle_state == 0 ) {
571 // Pick some window on which to do queries.
572 // XXX Perhaps all this graphics initialization code should be
573 // moved to renderer.cxx?
574 genOp = new GeneralInitOperation;
575 osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
576 WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
577 osg::GraphicsContext* gc = 0;
579 gc = guiCamera->getGraphicsContext();
581 gc->add(genOp.get());
583 wsa->windows[0]->gc->add(genOp.get());
586 } else if ( idle_state == 1 ) {
588 if (!genOp->isFinished())
592 if (!guiFinishInit())
595 fgSplashProgress("reading aircraft list");
598 } else if ( idle_state == 2 ) {
600 // Read the list of available aircraft
602 fgSplashProgress("reading airport & navigation data");
605 } else if ( idle_state == 3 ) {
608 fgSplashProgress("setting up scenery");
611 } else if ( idle_state == 4 ) {
613 // based on the requested presets, calculate the true starting
616 fgInitTowerLocationListener();
618 SGTime *t = fgInitTime();
619 globals->set_time_params( t );
621 // Do some quick general initializations
622 if( !fgInitGeneral()) {
623 SG_LOG( SG_GENERAL, SG_ALERT,
624 "General initialization failed ..." );
628 ////////////////////////////////////////////////////////////////////
629 // Initialize the property-based built-in commands
630 ////////////////////////////////////////////////////////////////////
634 ////////////////////////////////////////////////////////////////////
635 // Initialize the material manager
636 ////////////////////////////////////////////////////////////////////
637 globals->set_matlib( new SGMaterialLib );
638 simgear::SGModelLib::init(globals->get_fg_root());
641 ////////////////////////////////////////////////////////////////////
642 // Initialize the TG scenery subsystem.
643 ////////////////////////////////////////////////////////////////////
644 globals->set_scenery( new FGScenery );
645 globals->get_scenery()->init();
646 globals->get_scenery()->bind();
647 globals->set_tile_mgr( new FGTileMgr );
650 ////////////////////////////////////////////////////////////////////
651 // Initialize the general model subsystem.
652 ////////////////////////////////////////////////////////////////////
653 globals->set_model_mgr(new FGModelMgr);
654 globals->get_model_mgr()->init();
655 globals->get_model_mgr()->bind();
656 fgSplashProgress("loading aircraft");
659 } else if ( idle_state == 5 ) {
662 ////////////////////////////////////////////////////////////////////
663 // Initialize the 3D aircraft model subsystem (has a dependency on
664 // the scenery subsystem.)
665 ////////////////////////////////////////////////////////////////////
666 globals->set_aircraft_model(new FGAircraftModel);
667 globals->get_aircraft_model()->init();
668 globals->get_aircraft_model()->bind();
670 ////////////////////////////////////////////////////////////////////
671 // Initialize the view manager subsystem.
672 ////////////////////////////////////////////////////////////////////
673 FGViewMgr *viewmgr = new FGViewMgr;
674 globals->set_viewmgr( viewmgr );
677 fgSplashProgress("generating sky elements");
680 } else if ( idle_state == 6 ) {
682 // Initialize the sky
683 SGPath ephem_data_path( globals->get_fg_root() );
684 ephem_data_path.append( "Astro" );
685 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
686 ephem->update( globals->get_time_params()->getMjd(),
687 globals->get_time_params()->getLst(),
689 globals->set_ephem( ephem );
691 // TODO: move to environment mgr
693 SGPath texture_path(globals->get_fg_root());
694 texture_path.append("Textures");
695 texture_path.append("Sky");
696 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
697 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
698 thesky->add_cloud_layer(layer);
701 SGPath sky_tex_path( globals->get_fg_root() );
702 sky_tex_path.append( "Textures" );
703 sky_tex_path.append( "Sky" );
704 thesky->texture_path( sky_tex_path.str() );
706 // The sun and moon diameters are scaled down numbers of the
707 // actual diameters. This was needed to fit both the sun and the
708 // moon within the distance to the far clip plane.
709 // Moon diameter: 3,476 kilometers
710 // Sun diameter: 1,390,000 kilometers
711 thesky->build( 80000.0, 80000.0,
713 *globals->get_ephem(),
714 fgGetNode("/environment", true));
716 // Initialize MagVar model
717 SGMagVar *magvar = new SGMagVar();
718 globals->set_mag( magvar );
721 // kludge to initialize mag compass
722 // (should only be done for in-flight
724 // update magvar model
725 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
726 * SGD_DEGREES_TO_RADIANS,
727 fgGetDouble("/position/latitude-deg")
728 * SGD_DEGREES_TO_RADIANS,
729 fgGetDouble("/position/altitude-ft")
731 globals->get_time_params()->getJD() );
732 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
733 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
734 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
737 // airport = new ssgBranch;
738 // airport->setName( "Airport Lighting" );
739 // lighting->addKid( airport );
741 // build our custom render states
742 fgSplashProgress("initializing subsystems");
745 } else if ( idle_state == 7 ) {
747 // Initialize audio support
748 #ifdef ENABLE_AUDIO_SUPPORT
750 // Start the intro music
751 if ( fgGetBool("/sim/startup/intro-music") ) {
752 SGPath mp3file( globals->get_fg_root() );
753 mp3file.append( "Sounds/intro.mp3" );
755 SG_LOG( SG_GENERAL, SG_INFO,
756 "Starting intro music: " << mp3file.str() );
758 # if defined( __CYGWIN__ )
759 string command = "start /m `cygpath -w " + mp3file.str() + "`";
760 # elif defined( WIN32 )
761 string command = "start /m " + mp3file.str();
763 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
766 system ( command.c_str() );
769 // This is the top level init routine which calls all the
770 // other subsystem initialization routines. If you are adding
771 // a subsystem to flightgear, its initialization call should be
772 // located in this routine.
773 if( !fgInitSubsystems()) {
774 SG_LOG( SG_GENERAL, SG_ALERT,
775 "Subsystem initialization failed ..." );
778 fgSplashProgress("setting up time & renderer");
781 } else if ( idle_state == 8 ) {
783 // Initialize the time offset (warp) after fgInitSubsystem
784 // (which initializes the lighting interpolation tables.)
787 // setup OpenGL view parameters
788 globals->get_renderer()->init();
790 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
791 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
792 fgGetInt("/sim/startup/ysize") );
794 fgSplashProgress("loading scenery objects");
795 int session = fgGetInt("/sim/session",0);
797 fgSetInt("/sim/session",session);
800 if ( idle_state == 1000 ) {
801 // We've finished all our initialization steps, from now on we
802 // run the main loop.
803 fgSetBool("sim/sceneryloaded", false);
804 fgRegisterIdleHandler( fgMainLoop );
809 static void upper_case_property(const char *name)
811 using namespace simgear;
812 SGPropertyNode *p = fgGetNode(name, false);
814 p = fgGetNode(name, true);
815 p->setStringValue("");
817 props::Type t = p->getType();
818 if (t == props::NONE || t == props::UNSPECIFIED)
819 p->setStringValue("");
821 assert(t == props::STRING);
823 p->addChangeListener(new FGMakeUpperCase);
827 // Main top level initialization
828 bool fgMainInit( int argc, char **argv ) {
830 // set default log levels
831 sglog().setLogLevels( SG_ALL, SG_ALERT );
834 #ifdef FLIGHTGEAR_VERSION
835 version = FLIGHTGEAR_VERSION;
837 version = "unknown version";
839 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
841 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
843 // Allocate global data structures. This needs to happen before
844 // we parse command line options
846 globals = new FGGlobals;
848 // seed the random number generator
851 FGControls *controls = new FGControls;
852 globals->set_controls( controls );
854 string_list *col = new string_list;
855 globals->set_channel_options_list( col );
857 fgValidatePath("", false); // initialize static variables
858 upper_case_property("/sim/presets/airport-id");
859 upper_case_property("/sim/presets/runway");
860 upper_case_property("/sim/tower/airport-id");
861 upper_case_property("/autopilot/route-manager/input");
863 // Scan the config file(s) and command line options to see if
864 // fg_root was specified (ignore all other options for now)
865 fgInitFGRoot(argc, argv);
867 // Check for the correct base package version
868 static char required_version[] = "1.9.0";
869 string base_version = fgBasePackageVersion();
870 if ( !(base_version == required_version) ) {
871 // tell the operator how to use this application
873 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
874 cerr << endl << "Base package check failed ... " \
875 << "Found version " << base_version << " at: " \
876 << globals->get_fg_root() << endl;
877 cerr << "Please upgrade to version: " << required_version << endl;
879 cerr << "Hit a key to continue..." << endl;
885 // Load the configuration parameters. (Command line options
886 // override config file options. Config file options override
888 if ( !fgInitConfig(argc, argv) ) {
889 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
893 // Initialize the Window/Graphics environment.
894 fgOSInit(&argc, argv);
897 fgRegisterWindowResizeHandler( &FGRenderer::resize );
898 fgRegisterIdleHandler( &fgIdleFunction );
899 fgRegisterDrawHandler( &FGRenderer::update );
901 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
902 bool get_stencil_buffer = true;
904 bool get_stencil_buffer = false;
907 // Initialize plib net interface
908 netInit( &argc, argv );
910 // Clouds3D requires an alpha channel
911 // clouds may require stencil buffer
912 fgOSOpenWindow(get_stencil_buffer);
914 // Initialize the splash screen right away
918 // pass control off to the master event handler
921 // we never actually get here ... but to avoid compiler warnings,