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/beacon.hxx>
65 #include <Sound/morse.hxx>
66 #include <FDM/flight.hxx>
67 #include <ATCDCL/ATCmgr.hxx>
68 #include <ATCDCL/AIMgr.hxx>
69 #include <Time/tmp.hxx>
70 #include <Time/fg_timer.hxx>
71 #include <Environment/environment_mgr.hxx>
72 #include <GUI/new_gui.hxx>
73 #include <MultiPlayer/multiplaymgr.hxx>
75 #include "CameraGroup.hxx"
76 #include "fg_commands.hxx"
78 #include "renderer.hxx"
82 #include "fg_init.hxx"
83 #include "WindowSystemAdapter.hxx"
86 static double real_delta_time_sec = 0.0;
87 double delta_time_sec = 0.0;
88 extern float init_volume;
90 using namespace flightgear;
94 // This is a record containing a bit of global housekeeping information
97 // Specify our current idle function state. This is used to run all
98 // our initializations out of the idle callback so that we can get a
99 // splash screen up and running right away.
101 long global_multi_loop;
103 SGTimeStamp last_time_stamp;
104 SGTimeStamp current_time_stamp;
106 // The atexit() function handler should know when the graphical subsystem
108 extern int _bootstrap_OSInit;
112 // Update internal time dependent calculations (i.e. flight model)
113 // FIXME: this distinction is obsolete; all subsystems now get delta
115 void fgUpdateTimeDepCalcs() {
116 static bool inited = false;
118 static const SGPropertyNode *replay_state
119 = fgGetNode( "/sim/freeze/replay-state", true );
120 static SGPropertyNode *replay_time
121 = fgGetNode( "/sim/replay/time", true );
122 // static const SGPropertyNode *replay_end_time
123 // = fgGetNode( "/sim/replay/end-time", true );
125 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
127 // Initialize the FDM here if it hasn't been and if we have a
128 // scenery elevation hit.
130 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
131 // << " cur_elev = " << scenery.get_cur_elev() << endl;
133 if (!cur_fdm_state->get_inited()) {
134 // Check for scenery around the aircraft.
135 double lon = fgGetDouble("/sim/presets/longitude-deg");
136 double lat = fgGetDouble("/sim/presets/latitude-deg");
137 // We require just to have 50 meter scenery availabe around
139 double range = 1000.0;
140 if (globals->get_scenery()->scenery_available(lat, lon, range)) {
141 //SG_LOG(SG_FLIGHT, SG_INFO, "Finally initializing fdm");
142 cur_fdm_state->init();
143 if ( cur_fdm_state->get_bound() ) {
144 cur_fdm_state->unbind();
146 cur_fdm_state->bind();
150 // conceptually, the following block could be done for each fdm
152 if ( cur_fdm_state->get_inited() ) {
153 // we have been inited, and we are good to go ...
155 if ( replay_state->getIntValue() == 0 ) {
156 // replay off, run fdm
157 cur_fdm_state->update( delta_time_sec );
159 FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
160 r->replay( replay_time->getDoubleValue() );
161 if ( replay_state->getIntValue() == 1 ) {
163 replay_time->setDoubleValue( replay_time->getDoubleValue()
165 * fgGetInt("/sim/speed-up") ) );
166 } else if ( replay_state->getIntValue() == 2 ) {
167 // paused playback (don't advance replay time)
173 fgSetBool("/sim/signals/fdm-initialized", true);
177 // do nothing, fdm isn't inited yet
180 globals->get_model_mgr()->update(delta_time_sec);
181 globals->get_aircraft_model()->update(delta_time_sec);
183 // Update solar system
184 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
185 globals->get_time_params()->getLst(),
186 cur_fdm_state->get_Latitude() );
191 void fgInitTimeDepCalcs( void ) {
196 static const double alt_adjust_ft = 3.758099;
197 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
200 // What should we do when we have nothing else to do? Let's get ready
201 // for the next move and update the display?
202 static void fgMainLoop( void ) {
203 int model_hz = fgGetInt("/sim/model-hz");
205 static SGConstPropertyNode_ptr longitude
206 = fgGetNode("/position/longitude-deg");
207 static SGConstPropertyNode_ptr latitude
208 = fgGetNode("/position/latitude-deg");
209 static SGConstPropertyNode_ptr altitude
210 = fgGetNode("/position/altitude-ft");
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;
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 while ( current_time_stamp - last_time_stamp < frame_us ) {
284 current_time_stamp.stamp();
287 // run as fast as the app will go
288 current_time_stamp.stamp();
292 = double(current_time_stamp - last_time_stamp) / 1000000.0;
294 // Limit the time we need to spend in simulation loops
295 // That means, if the /sim/max-simtime-per-frame value is strictly positive
296 // you can limit the maximum amount of time you will do simulations for
297 // one frame to display. The cpu time spent in simulations code is roughly
298 // at least O(real_delta_time_sec). If this is (due to running debug
299 // builds or valgrind or something different blowing up execution times)
300 // larger than the real time you will no longer get any response
301 // from flightgear. This limits that effect. Just set to property from
302 // your .fgfsrc or commandline ...
303 double dtMax = max_simtime_per_frame->getDoubleValue();
304 if (0 < dtMax && dtMax < real_delta_time_sec)
305 real_delta_time_sec = dtMax;
307 // round the real time down to a multiple of 1/model-hz.
308 // this way all systems are updated the _same_ amount of dt.
310 static double rem = 0.0;
311 real_delta_time_sec += rem;
312 double hz = model_hz;
313 double nit = floor(real_delta_time_sec*hz);
314 rem = real_delta_time_sec - nit/hz;
315 real_delta_time_sec = nit/hz;
319 if (clock_freeze->getBoolValue() || wait_for_scenery) {
322 delta_time_sec = real_delta_time_sec;
324 last_time_stamp = current_time_stamp;
325 globals->inc_sim_time_sec( delta_time_sec );
327 // These are useful, especially for Nasal scripts.
328 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
329 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
331 static long remainder = 0;
333 #ifdef FANCY_FRAME_COUNTER
337 static time_t last_time = 0;
338 static int frames = 0;
339 #endif // FANCY_FRAME_COUNTER
341 SGTime *t = globals->get_time_params();
343 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
344 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
346 // Fix elevation. I'm just sticking this here for now, it should
347 // probably move eventually
349 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
350 scenery.get_cur_elev(),
351 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
352 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
354 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
355 scenery.get_cur_elev(),
356 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
357 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
359 // cout << "Warp = " << globals->get_warp() << endl;
362 static bool last_clock_freeze = false;
364 if ( clock_freeze->getBoolValue() ) {
365 // clock freeze requested
366 if ( cur_time_override->getLongValue() == 0 ) {
367 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
368 globals->set_warp( 0 );
371 // no clock freeze requested
372 if ( last_clock_freeze == true ) {
373 // clock just unfroze, let's set warp as the difference
374 // between frozen time and current time so we don't get a
375 // time jump (and corresponding sky object and lighting
377 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
378 fgSetLong( "/sim/time/cur-time-override", 0 );
380 if ( globals->get_warp_delta() != 0 ) {
381 globals->inc_warp( globals->get_warp_delta() );
385 last_clock_freeze = clock_freeze->getBoolValue();
387 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
388 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
389 cur_time_override->getLongValue(),
390 globals->get_warp() );
392 if (globals->get_warp_delta() != 0) {
393 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
397 // update magvar model
398 globals->get_mag()->update( longitude->getDoubleValue()
399 * SGD_DEGREES_TO_RADIANS,
400 latitude->getDoubleValue()
401 * SGD_DEGREES_TO_RADIANS,
402 altitude->getDoubleValue() * SG_FEET_TO_METER,
403 globals->get_time_params()->getJD() );
405 // Get elapsed time (in usec) for this past frame
406 elapsed = fgGetTimeInterval();
407 SG_LOG( SG_ALL, SG_DEBUG,
408 "Elapsed time interval is = " << elapsed
409 << ", previous remainder is = " << remainder );
411 // Calculate frame rate average
412 #ifdef FANCY_FRAME_COUNTER
413 /* old fps calculation */
417 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
418 tmp = general.get_frame(i);
420 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
421 general.set_frame(i+1,tmp);
423 tmp = 1000000.0 / (float)elapsed;
424 general.set_frame(0,tmp);
425 // printf("frame[0] = %.2f\n", general.frames[0]);
427 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
428 // printf("ave = %.2f\n", general.frame_rate);
431 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
432 general.set_frame_rate( frames );
433 fgSetInt("/sim/frame-rate", frames);
434 SG_LOG( SG_ALL, SG_DEBUG,
435 "--> Frame rate is = " << general.get_frame_rate() );
438 last_time = t->get_cur_time();
442 // Update any multiplayer's network queues, the AIMultiplayer
443 // implementation is an AI model and depends on that
444 globals->get_multiplayer_mgr()->Update();
447 if (fgGetBool("/sim/atc/enabled"))
448 globals->get_ATC_mgr()->update(delta_time_sec);
450 // Run the AI subsystem
451 // FIXME: run that also if we have multiplaying enabled since the
452 // multiplayer information is interpreted by an AI model
453 if (fgGetBool("/sim/ai-traffic/enabled"))
454 globals->get_AI_mgr()->update(delta_time_sec);
458 // Calculate model iterations needed for next frame
459 elapsed += remainder;
461 global_multi_loop = (long)(((double)elapsed * 0.000001) * model_hz );
462 remainder = elapsed - ( (global_multi_loop*1000000) / model_hz );
463 SG_LOG( SG_ALL, SG_DEBUG,
464 "Model iterations needed = " << global_multi_loop
465 << ", new remainder = " << remainder );
467 // chop max iterations to something reasonable if the sim was
468 // delayed for an excessive amount of time
469 if ( global_multi_loop > 2.0 * model_hz ) {
470 global_multi_loop = (int)(2.0 * model_hz );
475 if ( global_multi_loop > 0) {
476 // first run the flight model each frame until it is initialized
477 // then continue running each frame only after initial scenery load is complete.
478 fgUpdateTimeDepCalcs();
480 SG_LOG( SG_ALL, SG_DEBUG,
481 "Elapsed time is zero ... we're zinging" );
484 SGSoundMgr *smgr = globals->get_soundmgr();
485 smgr->update(delta_time_sec);
486 globals->get_subsystem_mgr()->update(delta_time_sec);
489 // Tile Manager updates - see if we need to load any new scenery tiles.
490 // this code ties together the fdm, viewer and scenery classes...
491 // we may want to move this to its own class at some point
493 double visibility_meters = fgGetDouble("/environment/visibility-m");
495 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
496 // update tile manager for view...
497 SGLocation *view_location = globals->get_current_view()->getSGLocation();
498 globals->get_tile_mgr()->update( view_location, visibility_meters );
500 double lon = view_location->getLongitude_deg();
501 double lat = view_location->getLatitude_deg();
502 double alt = view_location->getAltitudeASL_ft() * SG_FEET_TO_METER;
504 // check if we can reuse the groundcache for that purpose.
507 bool valid = cur_fdm_state->is_valid_m(&ref_time, pt.sg(), &r);
508 SGVec3d viewpos(globals->get_current_view()->get_view_pos());
509 if (valid && distSqr(viewpos, pt) < r*r) {
510 // Reuse the cache ...
512 = cur_fdm_state->get_groundlevel_m(lat*SGD_DEGREES_TO_RADIANS,
513 lon*SGD_DEGREES_TO_RADIANS,
515 view_location->set_cur_elev_m( lev );
517 // Do full intersection test.
519 if (globals->get_scenery()->get_elevation_m(lat, lon, alt+2, lev, 0))
520 view_location->set_cur_elev_m( lev );
522 view_location->set_cur_elev_m( -9999.0 );
526 // run Nasal's settimer() loops right before the view manager
527 globals->get_event_mgr()->update(delta_time_sec);
529 // update the view angle as late as possible, but before sound calculations
530 globals->get_viewmgr()->update(delta_time_sec);
532 // Do any I/O channel work that might need to be done (must come after viewmgr)
533 globals->get_io()->update(real_delta_time_sec);
535 // END Tile Manager udpates
537 if (!scenery_loaded && globals->get_tile_mgr()->isSceneryLoaded()
538 && cur_fdm_state->get_inited()) {
539 fgSetBool("sim/sceneryloaded",true);
540 fgSetFloat("/sim/sound/volume", init_volume);
541 globals->get_soundmgr()->set_volume(init_volume);
546 SG_LOG( SG_ALL, SG_DEBUG, "" );
549 // Operation for querying OpenGL parameters. This must be done in a
550 // valid OpenGL context, potentially in another thread.
553 struct GeneralInitOperation : public GraphicsContextOperation
555 GeneralInitOperation()
556 : GraphicsContextOperation(std::string("General init"))
559 void run(osg::GraphicsContext* gc)
561 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
562 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
563 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
564 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
567 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
568 general.set_glMaxTexSize( tmp );
569 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
571 glGetIntegerv( GL_DEPTH_BITS, &tmp );
572 general.set_glDepthBits( tmp );
573 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
578 // This is the top level master main function that is registered as
581 // The first few passes take care of initialization things (a couple
582 // per pass) and once everything has been initialized fgMainLoop from
585 static void fgIdleFunction ( void ) {
586 static osg::ref_ptr<GeneralInitOperation> genOp;
587 if ( idle_state == 0 ) {
589 // Pick some window on which to do queries.
590 // XXX Perhaps all this graphics initialization code should be
591 // moved to renderer.cxx?
592 genOp = new GeneralInitOperation;
593 osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
594 WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
595 osg::GraphicsContext* gc = 0;
597 gc = guiCamera->getGraphicsContext();
599 gc->add(genOp.get());
601 wsa->windows[0]->gc->add(genOp.get());
604 } else if ( idle_state == 1 ) {
606 if (!genOp->isFinished())
610 if (!guiFinishInit())
613 fgSplashProgress("reading aircraft list");
616 } else if ( idle_state == 2 ) {
618 // Read the list of available aircraft
620 fgSplashProgress("reading airport & navigation data");
623 } else if ( idle_state == 3 ) {
626 fgSplashProgress("setting up scenery");
629 } else if ( idle_state == 4 ) {
631 // based on the requested presets, calculate the true starting
634 fgInitTowerLocationListener();
636 SGTime *t = fgInitTime();
637 globals->set_time_params( t );
639 // Do some quick general initializations
640 if( !fgInitGeneral()) {
641 SG_LOG( SG_GENERAL, SG_ALERT,
642 "General initialization failed ..." );
646 ////////////////////////////////////////////////////////////////////
647 // Initialize the property-based built-in commands
648 ////////////////////////////////////////////////////////////////////
652 ////////////////////////////////////////////////////////////////////
653 // Initialize the material manager
654 ////////////////////////////////////////////////////////////////////
655 globals->set_matlib( new SGMaterialLib );
656 simgear::SGModelLib::init(globals->get_fg_root());
659 ////////////////////////////////////////////////////////////////////
660 // Initialize the TG scenery subsystem.
661 ////////////////////////////////////////////////////////////////////
662 globals->set_scenery( new FGScenery );
663 globals->get_scenery()->init();
664 globals->get_scenery()->bind();
665 globals->set_tile_mgr( new FGTileMgr );
668 ////////////////////////////////////////////////////////////////////
669 // Initialize the general model subsystem.
670 ////////////////////////////////////////////////////////////////////
671 globals->set_model_mgr(new FGModelMgr);
672 globals->get_model_mgr()->init();
673 globals->get_model_mgr()->bind();
674 fgSplashProgress("loading aircraft");
677 } else if ( idle_state == 5 ) {
679 ////////////////////////////////////////////////////////////////////
680 // Initialize the 3D aircraft model subsystem (has a dependency on
681 // the scenery subsystem.)
682 ////////////////////////////////////////////////////////////////////
683 globals->set_aircraft_model(new FGAircraftModel);
684 globals->get_aircraft_model()->init();
685 globals->get_aircraft_model()->bind();
687 ////////////////////////////////////////////////////////////////////
688 // Initialize the view manager subsystem.
689 ////////////////////////////////////////////////////////////////////
690 FGViewMgr *viewmgr = new FGViewMgr;
691 globals->set_viewmgr( viewmgr );
694 fgSplashProgress("generating sky elements");
697 } else if ( idle_state == 6 ) {
699 // Initialize the sky
700 SGPath ephem_data_path( globals->get_fg_root() );
701 ephem_data_path.append( "Astro" );
702 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
703 ephem->update( globals->get_time_params()->getMjd(),
704 globals->get_time_params()->getLst(),
706 globals->set_ephem( ephem );
708 // TODO: move to environment mgr
710 SGPath texture_path(globals->get_fg_root());
711 texture_path.append("Textures");
712 texture_path.append("Sky");
713 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
714 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
715 thesky->add_cloud_layer(layer);
718 SGPath sky_tex_path( globals->get_fg_root() );
719 sky_tex_path.append( "Textures" );
720 sky_tex_path.append( "Sky" );
721 thesky->texture_path( sky_tex_path.str() );
723 // The sun and moon diameters are scaled down numbers of the
724 // actual diameters. This was needed to fit both the sun and the
725 // moon within the distance to the far clip plane.
726 // Moon diameter: 3,476 kilometers
727 // Sun diameter: 1,390,000 kilometers
728 thesky->build( 80000.0, 80000.0,
730 globals->get_ephem()->getNumPlanets(),
731 globals->get_ephem()->getPlanets(),
732 globals->get_ephem()->getNumStars(),
733 globals->get_ephem()->getStars(),
734 fgGetNode("/environment", true));
736 // Initialize MagVar model
737 SGMagVar *magvar = new SGMagVar();
738 globals->set_mag( magvar );
741 // kludge to initialize mag compass
742 // (should only be done for in-flight
744 // update magvar model
745 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
746 * SGD_DEGREES_TO_RADIANS,
747 fgGetDouble("/position/latitude-deg")
748 * SGD_DEGREES_TO_RADIANS,
749 fgGetDouble("/position/altitude-ft")
751 globals->get_time_params()->getJD() );
752 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
753 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
754 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
757 // airport = new ssgBranch;
758 // airport->setName( "Airport Lighting" );
759 // lighting->addKid( airport );
761 // build our custom render states
762 fgSplashProgress("initializing subsystems");
765 } else if ( idle_state == 7 ) {
767 // Initialize audio support
768 #ifdef ENABLE_AUDIO_SUPPORT
770 // Start the intro music
771 if ( fgGetBool("/sim/startup/intro-music") ) {
772 SGPath mp3file( globals->get_fg_root() );
773 mp3file.append( "Sounds/intro.mp3" );
775 SG_LOG( SG_GENERAL, SG_INFO,
776 "Starting intro music: " << mp3file.str() );
778 #if defined( __CYGWIN__ )
779 string command = "start /m `cygpath -w " + mp3file.str() + "`";
780 #elif defined( WIN32 )
781 string command = "start /m " + mp3file.str();
783 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
786 system ( command.c_str() );
789 // This is the top level init routine which calls all the
790 // other subsystem initialization routines. If you are adding
791 // a subsystem to flightgear, its initialization call should be
792 // located in this routine.
793 if( !fgInitSubsystems()) {
794 SG_LOG( SG_GENERAL, SG_ALERT,
795 "Subsystem initialization failed ..." );
798 fgSplashProgress("setting up time & renderer");
801 } else if ( idle_state == 8 ) {
803 // Initialize the time offset (warp) after fgInitSubsystem
804 // (which initializes the lighting interpolation tables.)
807 // setup OpenGL view parameters
808 globals->get_renderer()->init();
810 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
811 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
812 fgGetInt("/sim/startup/ysize") );
814 fgSplashProgress("loading scenery objects");
818 if ( idle_state == 1000 ) {
819 // We've finished all our initialization steps, from now on we
820 // run the main loop.
821 fgSetBool("sim/sceneryloaded", false);
822 fgRegisterIdleHandler( fgMainLoop );
827 static void upper_case_property(const char *name)
829 SGPropertyNode *p = fgGetNode(name, false);
831 p = fgGetNode(name, true);
832 p->setStringValue("");
834 SGPropertyNode::Type t = p->getType();
835 if (t == SGPropertyNode::NONE || t == SGPropertyNode::UNSPECIFIED)
836 p->setStringValue("");
838 assert(t == SGPropertyNode::STRING);
840 p->addChangeListener(new FGMakeUpperCase);
844 // Main top level initialization
845 bool fgMainInit( int argc, char **argv ) {
847 // set default log levels
848 sglog().setLogLevels( SG_ALL, SG_ALERT );
851 #ifdef FLIGHTGEAR_VERSION
852 version = FLIGHTGEAR_VERSION;
854 version = "unknown version";
856 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
858 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
860 // Allocate global data structures. This needs to happen before
861 // we parse command line options
863 globals = new FGGlobals;
865 // seed the random number generator
868 FGControls *controls = new FGControls;
869 globals->set_controls( controls );
871 string_list *col = new string_list;
872 globals->set_channel_options_list( col );
874 fgValidatePath("", false); // initialize static variables
875 upper_case_property("/sim/presets/airport-id");
876 upper_case_property("/sim/presets/runway");
877 upper_case_property("/sim/tower/airport-id");
878 upper_case_property("/autopilot/route-manager/input");
880 // Scan the config file(s) and command line options to see if
881 // fg_root was specified (ignore all other options for now)
882 fgInitFGRoot(argc, argv);
884 // Check for the correct base package version
885 static char required_version[] = "1.0.0";
886 string base_version = fgBasePackageVersion();
887 if ( !(base_version == required_version) ) {
888 // tell the operator how to use this application
890 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
891 cerr << endl << "Base package check failed ... " \
892 << "Found version " << base_version << " at: " \
893 << globals->get_fg_root() << endl;
894 cerr << "Please upgrade to version: " << required_version << endl;
896 cerr << "Hit a key to continue..." << endl;
902 // Load the configuration parameters. (Command line options
903 // override config file options. Config file options override
905 if ( !fgInitConfig(argc, argv) ) {
906 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
910 // Initialize the Window/Graphics environment.
911 fgOSInit(&argc, argv);
914 fgRegisterWindowResizeHandler( &FGRenderer::resize );
915 fgRegisterIdleHandler( &fgIdleFunction );
916 fgRegisterDrawHandler( &FGRenderer::update );
918 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
919 bool get_stencil_buffer = true;
921 bool get_stencil_buffer = false;
924 // Initialize plib net interface
925 netInit( &argc, argv );
927 // Clouds3D requires an alpha channel
928 // clouds may require stencil buffer
929 fgOSOpenWindow(get_stencil_buffer);
931 // Initialize the splash screen right away
935 // pass control off to the master event handler
938 // we never actually get here ... but to avoid compiler warnings,