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;
90 extern float init_volume;
92 using namespace flightgear;
96 // This is a record containing a bit of global housekeeping information
99 // Specify our current idle function state. This is used to run all
100 // our initializations out of the idle callback so that we can get a
101 // splash screen up and running right away.
103 long global_multi_loop;
105 SGTimeStamp last_time_stamp;
106 SGTimeStamp current_time_stamp;
108 // The atexit() function handler should know when the graphical subsystem
110 extern int _bootstrap_OSInit;
114 // Update internal time dependent calculations (i.e. flight model)
115 // FIXME: this distinction is obsolete; all subsystems now get delta
117 void fgUpdateTimeDepCalcs() {
118 static bool inited = false;
120 static const SGPropertyNode *replay_state
121 = fgGetNode( "/sim/freeze/replay-state", true );
122 static SGPropertyNode *replay_time
123 = fgGetNode( "/sim/replay/time", true );
124 // static const SGPropertyNode *replay_end_time
125 // = fgGetNode( "/sim/replay/end-time", true );
127 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
129 // Initialize the FDM here if it hasn't been and if we have a
130 // scenery elevation hit.
132 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
133 // << " cur_elev = " << scenery.get_cur_elev() << endl;
135 if (!cur_fdm_state->get_inited()) {
136 // Check for scenery around the aircraft.
137 double lon = fgGetDouble("/sim/presets/longitude-deg");
138 double lat = fgGetDouble("/sim/presets/latitude-deg");
139 // We require just to have 50 meter scenery availabe around
141 double range = 1000.0;
142 SGGeod geod = SGGeod::fromDeg(lon, lat);
143 if (globals->get_scenery()->scenery_available(geod, range)) {
144 //SG_LOG(SG_FLIGHT, SG_INFO, "Finally initializing fdm");
145 cur_fdm_state->init();
146 if ( cur_fdm_state->get_bound() ) {
147 cur_fdm_state->unbind();
149 cur_fdm_state->bind();
153 // conceptually, the following block could be done for each fdm
155 if ( cur_fdm_state->get_inited() ) {
156 // we have been inited, and we are good to go ...
158 if ( replay_state->getIntValue() == 0 ) {
159 // replay off, run fdm
160 cur_fdm_state->update( delta_time_sec );
162 FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
163 r->replay( replay_time->getDoubleValue() );
164 if ( replay_state->getIntValue() == 1 ) {
166 replay_time->setDoubleValue( replay_time->getDoubleValue()
168 * fgGetInt("/sim/speed-up") ) );
169 } else if ( replay_state->getIntValue() == 2 ) {
170 // paused playback (don't advance replay time)
176 fgSetBool("/sim/signals/fdm-initialized", true);
180 // do nothing, fdm isn't inited yet
183 globals->get_aircraft_model()->update(delta_time_sec);
185 // Update solar system
186 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
187 globals->get_time_params()->getLst(),
188 cur_fdm_state->get_Latitude() );
193 // What should we do when we have nothing else to do? Let's get ready
194 // for the next move and update the display?
195 static void fgMainLoop( void ) {
196 int model_hz = fgGetInt("/sim/model-hz");
198 static SGConstPropertyNode_ptr longitude
199 = fgGetNode("/position/longitude-deg");
200 static SGConstPropertyNode_ptr latitude
201 = fgGetNode("/position/latitude-deg");
202 static SGConstPropertyNode_ptr altitude
203 = fgGetNode("/position/altitude-ft");
204 static SGConstPropertyNode_ptr vn_fps
205 = fgGetNode("/velocities/speed-north-fps");
206 static SGConstPropertyNode_ptr ve_fps
207 = fgGetNode("/velocities/speed-east-fps");
208 static SGConstPropertyNode_ptr vd_fps
209 = fgGetNode("/velocities/speed-down-fps");
210 static SGConstPropertyNode_ptr clock_freeze
211 = fgGetNode("/sim/freeze/clock", true);
212 static SGConstPropertyNode_ptr cur_time_override
213 = fgGetNode("/sim/time/cur-time-override", true);
214 static SGConstPropertyNode_ptr max_simtime_per_frame
215 = fgGetNode("/sim/max-simtime-per-frame", true);
216 static SGPropertyNode_ptr frame_signal
217 = fgGetNode("/sim/signals/frame", true);
219 frame_signal->fireValueChanged();
220 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
222 bool scenery_loaded = fgGetBool("sim/sceneryloaded");
223 bool wait_for_scenery = !(scenery_loaded || fgGetBool("sim/sceneryloaded-override"));
225 // Update the elapsed time.
226 static bool first_time = true;
228 last_time_stamp.stamp();
232 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
233 if ( throttle_hz > 0.0 && !wait_for_scenery ) {
234 // optionally throttle the frame rate (to get consistent frame
235 // rates or reduce cpu usage.
237 double frame_us = 1000000.0 / throttle_hz;
239 #define FG_SLEEP_BASED_TIMING 1
240 #if defined(FG_SLEEP_BASED_TIMING)
241 // sleep based timing loop.
243 // Calling sleep, even usleep() on linux is less accurate than
244 // we like, but it does free up the cpu for other tasks during
245 // the sleep so it is desirable. Because of the way sleep()
246 // is implemented in consumer operating systems like windows
247 // and linux, you almost always sleep a little longer than the
250 // To combat the problem of sleeping too long, we calculate the
251 // desired wait time and shorten it by 2000us (2ms) to avoid
252 // [hopefully] over-sleep'ing. The 2ms value was arrived at
253 // via experimentation. We follow this up at the end with a
254 // simple busy-wait loop to get the final pause timing exactly
257 // Assuming we don't oversleep by more than 2000us, this
258 // should be a reasonable compromise between sleep based
259 // waiting, and busy waiting.
261 // sleep() will always overshoot by a bit so undersleep by
262 // 2000us in the hopes of never oversleeping.
264 if ( frame_us < 0.0 ) {
267 current_time_stamp.stamp();
269 double elapsed_us = (current_time_stamp - last_time_stamp).toUSecs();
270 if ( elapsed_us < frame_us ) {
271 double requested_us = frame_us - elapsed_us;
272 ulMilliSecondSleep ( (int)(requested_us / 1000.0) ) ;
276 // busy wait timing loop.
278 // This yields the most accurate timing. If the previous
279 // ulMilliSecondSleep() call is omitted this will peg the cpu
280 // (which is just fine if FG is the only app you care about.)
281 current_time_stamp.stamp();
282 SGTimeStamp next_time_stamp = last_time_stamp;
283 next_time_stamp += SGTimeStamp::fromSec(1e-6*frame_us);
284 while ( current_time_stamp < next_time_stamp ) {
285 current_time_stamp.stamp();
288 // run as fast as the app will go
289 current_time_stamp.stamp();
292 real_delta_time_sec = (current_time_stamp - last_time_stamp).toSecs();
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.
309 static double reminder = 0.0;
310 real_delta_time_sec += reminder;
311 global_multi_loop = long(floor(real_delta_time_sec*model_hz));
312 global_multi_loop = SGMisc<long>::max(0, global_multi_loop);
313 reminder = real_delta_time_sec - double(global_multi_loop)/double(model_hz);
314 real_delta_time_sec = double(global_multi_loop)/double(model_hz);
316 if (clock_freeze->getBoolValue() || wait_for_scenery) {
319 delta_time_sec = real_delta_time_sec;
321 last_time_stamp = current_time_stamp;
322 globals->inc_sim_time_sec( delta_time_sec );
324 // These are useful, especially for Nasal scripts.
325 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
326 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
328 #ifdef FANCY_FRAME_COUNTER
332 static time_t last_time = 0;
333 static int frames = 0;
334 #endif // FANCY_FRAME_COUNTER
336 SGTime *t = globals->get_time_params();
338 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
339 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
341 // Fix elevation. I'm just sticking this here for now, it should
342 // probably move eventually
344 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
345 scenery.get_cur_elev(),
346 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
347 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
349 /* printf("Adjustment - 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 // cout << "Warp = " << globals->get_warp() << endl;
357 static bool last_clock_freeze = false;
359 if ( clock_freeze->getBoolValue() ) {
360 // clock freeze requested
361 if ( cur_time_override->getLongValue() == 0 ) {
362 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
363 globals->set_warp( 0 );
366 // no clock freeze requested
367 if ( last_clock_freeze == true ) {
368 // clock just unfroze, let's set warp as the difference
369 // between frozen time and current time so we don't get a
370 // time jump (and corresponding sky object and lighting
372 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
373 fgSetLong( "/sim/time/cur-time-override", 0 );
375 if ( globals->get_warp_delta() != 0 ) {
376 globals->inc_warp( globals->get_warp_delta() );
380 last_clock_freeze = clock_freeze->getBoolValue();
382 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
383 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
384 cur_time_override->getLongValue(),
385 globals->get_warp() );
387 if (globals->get_warp_delta() != 0) {
388 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
392 // update magvar model
393 globals->get_mag()->update( longitude->getDoubleValue()
394 * SGD_DEGREES_TO_RADIANS,
395 latitude->getDoubleValue()
396 * SGD_DEGREES_TO_RADIANS,
397 altitude->getDoubleValue() * SG_FEET_TO_METER,
398 globals->get_time_params()->getJD() );
400 // Calculate frame rate average
401 #ifdef FANCY_FRAME_COUNTER
402 /* old fps calculation */
406 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
407 tmp = general.get_frame(i);
409 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
410 general.set_frame(i+1,tmp);
412 tmp = 1000000.0 / (float)elapsed;
413 general.set_frame(0,tmp);
414 // printf("frame[0] = %.2f\n", general.frames[0]);
416 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
417 // printf("ave = %.2f\n", general.frame_rate);
420 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
421 general.set_frame_rate( frames );
422 fgSetInt("/sim/frame-rate", frames);
423 SG_LOG( SG_ALL, SG_DEBUG,
424 "--> Frame rate is = " << general.get_frame_rate() );
427 last_time = t->get_cur_time();
431 // Update any multiplayer's network queues, the AIMultiplayer
432 // implementation is an AI model and depends on that
433 globals->get_multiplayer_mgr()->Update();
436 if (fgGetBool("/sim/atc/enabled"))
437 globals->get_ATC_mgr()->update(delta_time_sec);
439 // Run the AI subsystem
440 // FIXME: run that also if we have multiplaying enabled since the
441 // multiplayer information is interpreted by an AI model
442 if (fgGetBool("/sim/ai-traffic/enabled"))
443 globals->get_AI_mgr()->update(delta_time_sec);
446 if (0 < global_multi_loop) {
447 // first run the flight model each frame until it is initialized
448 // then continue running each frame only after initial scenery
450 fgUpdateTimeDepCalcs();
452 SG_LOG( SG_ALL, SG_DEBUG,
453 "Elapsed time is zero ... we're zinging" );
456 globals->get_subsystem_mgr()->update(delta_time_sec);
459 // Tile Manager updates - see if we need to load any new scenery tiles.
460 // this code ties together the fdm, viewer and scenery classes...
461 // we may want to move this to its own class at some point
463 double visibility_meters = fgGetDouble("/environment/visibility-m");
465 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
466 // update tile manager for view...
467 SGVec3d viewPos = globals->get_current_view()->get_view_pos();
468 SGGeod geodViewPos = SGGeod::fromCart(viewPos);
469 globals->get_tile_mgr()->update(geodViewPos, visibility_meters);
471 // run Nasal's settimer() loops right before the view manager
472 globals->get_event_mgr()->update(delta_time_sec);
474 // pick up model coordidnates that Nasal code may have set relative to the
476 globals->get_model_mgr()->update(delta_time_sec);
478 // update the view angle as late as possible, but before sound calculations
479 globals->get_viewmgr()->update(real_delta_time_sec);
481 // END Tile Manager udpates
483 if (!scenery_loaded && globals->get_tile_mgr()->isSceneryLoaded()
484 && cur_fdm_state->get_inited()) {
485 fgSetBool("sim/sceneryloaded",true);
486 fgSetFloat("/sim/sound/volume", init_volume);
487 SGSoundMgr *smgr = (SGSoundMgr *)globals->get_subsystem("soundmgr");
488 smgr->set_volume(init_volume);
493 SG_LOG( SG_ALL, SG_DEBUG, "" );
496 // Operation for querying OpenGL parameters. This must be done in a
497 // valid OpenGL context, potentially in another thread.
500 struct GeneralInitOperation : public GraphicsContextOperation
502 GeneralInitOperation()
503 : GraphicsContextOperation(std::string("General init"))
506 void run(osg::GraphicsContext* gc)
508 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
509 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
510 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
511 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
514 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
515 general.set_glMaxTexSize( tmp );
516 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
518 glGetIntegerv( GL_DEPTH_BITS, &tmp );
519 general.set_glDepthBits( tmp );
520 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
525 // This is the top level master main function that is registered as
528 // The first few passes take care of initialization things (a couple
529 // per pass) and once everything has been initialized fgMainLoop from
532 static void fgIdleFunction ( void ) {
533 static osg::ref_ptr<GeneralInitOperation> genOp;
534 if ( idle_state == 0 ) {
536 // Pick some window on which to do queries.
537 // XXX Perhaps all this graphics initialization code should be
538 // moved to renderer.cxx?
539 genOp = new GeneralInitOperation;
540 osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
541 WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
542 osg::GraphicsContext* gc = 0;
544 gc = guiCamera->getGraphicsContext();
546 gc->add(genOp.get());
548 wsa->windows[0]->gc->add(genOp.get());
551 } else if ( idle_state == 1 ) {
553 if (!genOp->isFinished())
557 if (!guiFinishInit())
560 fgSplashProgress("reading aircraft list");
563 } else if ( idle_state == 2 ) {
565 // Read the list of available aircraft
567 fgSplashProgress("reading airport & navigation data");
570 } else if ( idle_state == 3 ) {
573 fgSplashProgress("setting up scenery");
576 } else if ( idle_state == 4 ) {
578 // based on the requested presets, calculate the true starting
581 fgInitTowerLocationListener();
583 SGTime *t = fgInitTime();
584 globals->set_time_params( t );
586 // Do some quick general initializations
587 if( !fgInitGeneral()) {
588 SG_LOG( SG_GENERAL, SG_ALERT,
589 "General initialization failed ..." );
593 ////////////////////////////////////////////////////////////////////
594 // Initialize the property-based built-in commands
595 ////////////////////////////////////////////////////////////////////
599 ////////////////////////////////////////////////////////////////////
600 // Initialize the material manager
601 ////////////////////////////////////////////////////////////////////
602 globals->set_matlib( new SGMaterialLib );
603 simgear::SGModelLib::init(globals->get_fg_root());
606 ////////////////////////////////////////////////////////////////////
607 // Initialize the TG scenery subsystem.
608 ////////////////////////////////////////////////////////////////////
609 globals->set_scenery( new FGScenery );
610 globals->get_scenery()->init();
611 globals->get_scenery()->bind();
612 globals->set_tile_mgr( new FGTileMgr );
615 ////////////////////////////////////////////////////////////////////
616 // Initialize the general model subsystem.
617 ////////////////////////////////////////////////////////////////////
618 globals->set_model_mgr(new FGModelMgr);
619 globals->get_model_mgr()->init();
620 globals->get_model_mgr()->bind();
621 fgSplashProgress("loading aircraft");
624 } else if ( idle_state == 5 ) {
626 ////////////////////////////////////////////////////////////////////
627 // Initialize the 3D aircraft model subsystem (has a dependency on
628 // the scenery subsystem.)
629 ////////////////////////////////////////////////////////////////////
630 globals->set_aircraft_model(new FGAircraftModel);
631 globals->get_aircraft_model()->init();
632 globals->get_aircraft_model()->bind();
634 ////////////////////////////////////////////////////////////////////
635 // Initialize the view manager subsystem.
636 ////////////////////////////////////////////////////////////////////
637 FGViewMgr *viewmgr = new FGViewMgr;
638 globals->set_viewmgr( viewmgr );
641 fgSplashProgress("generating sky elements");
644 } else if ( idle_state == 6 ) {
646 // Initialize the sky
647 SGPath ephem_data_path( globals->get_fg_root() );
648 ephem_data_path.append( "Astro" );
649 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
650 ephem->update( globals->get_time_params()->getMjd(),
651 globals->get_time_params()->getLst(),
653 globals->set_ephem( ephem );
655 // TODO: move to environment mgr
657 SGPath texture_path(globals->get_fg_root());
658 texture_path.append("Textures");
659 texture_path.append("Sky");
660 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
661 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
662 thesky->add_cloud_layer(layer);
665 SGPath sky_tex_path( globals->get_fg_root() );
666 sky_tex_path.append( "Textures" );
667 sky_tex_path.append( "Sky" );
668 thesky->texture_path( sky_tex_path.str() );
670 // The sun and moon diameters are scaled down numbers of the
671 // actual diameters. This was needed to fit both the sun and the
672 // moon within the distance to the far clip plane.
673 // Moon diameter: 3,476 kilometers
674 // Sun diameter: 1,390,000 kilometers
675 thesky->build( 80000.0, 80000.0,
677 *globals->get_ephem(),
678 fgGetNode("/environment", true));
680 // Initialize MagVar model
681 SGMagVar *magvar = new SGMagVar();
682 globals->set_mag( magvar );
685 // kludge to initialize mag compass
686 // (should only be done for in-flight
688 // update magvar model
689 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
690 * SGD_DEGREES_TO_RADIANS,
691 fgGetDouble("/position/latitude-deg")
692 * SGD_DEGREES_TO_RADIANS,
693 fgGetDouble("/position/altitude-ft")
695 globals->get_time_params()->getJD() );
696 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
697 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
698 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
701 // airport = new ssgBranch;
702 // airport->setName( "Airport Lighting" );
703 // lighting->addKid( airport );
705 // build our custom render states
706 fgSplashProgress("initializing subsystems");
709 } else if ( idle_state == 7 ) {
711 // Initialize audio support
712 #ifdef ENABLE_AUDIO_SUPPORT
714 // Start the intro music
715 if ( fgGetBool("/sim/startup/intro-music") ) {
716 SGPath mp3file( globals->get_fg_root() );
717 mp3file.append( "Sounds/intro.mp3" );
719 SG_LOG( SG_GENERAL, SG_INFO,
720 "Starting intro music: " << mp3file.str() );
722 # if defined( __CYGWIN__ )
723 string command = "start /m `cygpath -w " + mp3file.str() + "`";
724 # elif defined( WIN32 )
725 string command = "start /m " + mp3file.str();
727 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
730 system ( command.c_str() );
733 // This is the top level init routine which calls all the
734 // other subsystem initialization routines. If you are adding
735 // a subsystem to flightgear, its initialization call should be
736 // located in this routine.
737 if( !fgInitSubsystems()) {
738 SG_LOG( SG_GENERAL, SG_ALERT,
739 "Subsystem initialization failed ..." );
742 fgSplashProgress("setting up time & renderer");
745 } else if ( idle_state == 8 ) {
747 // Initialize the time offset (warp) after fgInitSubsystem
748 // (which initializes the lighting interpolation tables.)
751 // setup OpenGL view parameters
752 globals->get_renderer()->init();
754 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
755 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
756 fgGetInt("/sim/startup/ysize") );
758 fgSplashProgress("loading scenery objects");
762 if ( idle_state == 1000 ) {
763 // We've finished all our initialization steps, from now on we
764 // run the main loop.
765 fgSetBool("sim/sceneryloaded", false);
766 fgRegisterIdleHandler( fgMainLoop );
771 static void upper_case_property(const char *name)
773 using namespace simgear;
774 SGPropertyNode *p = fgGetNode(name, false);
776 p = fgGetNode(name, true);
777 p->setStringValue("");
779 props::Type t = p->getType();
780 if (t == props::NONE || t == props::UNSPECIFIED)
781 p->setStringValue("");
783 assert(t == props::STRING);
785 p->addChangeListener(new FGMakeUpperCase);
789 // Main top level initialization
790 bool fgMainInit( int argc, char **argv ) {
792 // set default log levels
793 sglog().setLogLevels( SG_ALL, SG_ALERT );
796 #ifdef FLIGHTGEAR_VERSION
797 version = FLIGHTGEAR_VERSION;
799 version = "unknown version";
801 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
803 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
805 // Allocate global data structures. This needs to happen before
806 // we parse command line options
808 globals = new FGGlobals;
810 // seed the random number generator
813 FGControls *controls = new FGControls;
814 globals->set_controls( controls );
816 string_list *col = new string_list;
817 globals->set_channel_options_list( col );
819 fgValidatePath("", false); // initialize static variables
820 upper_case_property("/sim/presets/airport-id");
821 upper_case_property("/sim/presets/runway");
822 upper_case_property("/sim/tower/airport-id");
823 upper_case_property("/autopilot/route-manager/input");
825 // Scan the config file(s) and command line options to see if
826 // fg_root was specified (ignore all other options for now)
827 fgInitFGRoot(argc, argv);
829 // Check for the correct base package version
830 static char required_version[] = "1.9.0";
831 string base_version = fgBasePackageVersion();
832 if ( !(base_version == required_version) ) {
833 // tell the operator how to use this application
835 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
836 cerr << endl << "Base package check failed ... " \
837 << "Found version " << base_version << " at: " \
838 << globals->get_fg_root() << endl;
839 cerr << "Please upgrade to version: " << required_version << endl;
841 cerr << "Hit a key to continue..." << endl;
847 // Load the configuration parameters. (Command line options
848 // override config file options. Config file options override
850 if ( !fgInitConfig(argc, argv) ) {
851 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
855 // Initialize the Window/Graphics environment.
856 fgOSInit(&argc, argv);
859 fgRegisterWindowResizeHandler( &FGRenderer::resize );
860 fgRegisterIdleHandler( &fgIdleFunction );
861 fgRegisterDrawHandler( &FGRenderer::update );
863 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
864 bool get_stencil_buffer = true;
866 bool get_stencil_buffer = false;
869 // Initialize plib net interface
870 netInit( &argc, argv );
872 // Clouds3D requires an alpha channel
873 // clouds may require stencil buffer
874 fgOSOpenWindow(get_stencil_buffer);
876 // Initialize the splash screen right away
880 // pass control off to the master event handler
883 // we never actually get here ... but to avoid compiler warnings,