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/scene/model/modellib.hxx>
45 #include <simgear/scene/material/matlib.hxx>
46 #include <simgear/scene/model/animation.hxx>
47 #include <simgear/scene/sky/sky.hxx>
48 #include <simgear/structure/event_mgr.hxx>
49 #include <simgear/props/AtomicChangeListener.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 <ATCDCL/ATCmgr.hxx>
69 #include <ATCDCL/AIMgr.hxx>
70 #include <Time/tmp.hxx>
71 #include <Environment/environment_mgr.hxx>
72 #include <Environment/ephemeris.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 fgInitSoundManager();
108 void fgSetNewSoundDevice(const char *);
110 // The atexit() function handler should know when the graphical subsystem
112 extern int _bootstrap_OSInit;
114 // What should we do when we have nothing else to do? Let's get ready
115 // for the next move and update the display?
116 static void fgMainLoop( void ) {
117 int model_hz = fgGetInt("/sim/model-hz");
119 static SGConstPropertyNode_ptr longitude
120 = fgGetNode("/position/longitude-deg");
121 static SGConstPropertyNode_ptr latitude
122 = fgGetNode("/position/latitude-deg");
123 static SGConstPropertyNode_ptr altitude
124 = fgGetNode("/position/altitude-ft");
125 static SGConstPropertyNode_ptr vn_fps
126 = fgGetNode("/velocities/speed-north-fps");
127 static SGConstPropertyNode_ptr ve_fps
128 = fgGetNode("/velocities/speed-east-fps");
129 static SGConstPropertyNode_ptr vd_fps
130 = fgGetNode("/velocities/speed-down-fps");
131 static SGConstPropertyNode_ptr clock_freeze
132 = fgGetNode("/sim/freeze/clock", true);
133 static SGConstPropertyNode_ptr cur_time_override
134 = fgGetNode("/sim/time/cur-time-override", true);
135 static SGConstPropertyNode_ptr max_simtime_per_frame
136 = fgGetNode("/sim/max-simtime-per-frame", true);
137 static SGPropertyNode_ptr frame_signal
138 = fgGetNode("/sim/signals/frame", true);
140 frame_signal->fireValueChanged();
141 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
143 bool scenery_loaded = fgGetBool("sim/sceneryloaded");
144 bool wait_for_scenery = !(scenery_loaded || fgGetBool("sim/sceneryloaded-override"));
146 // Update the elapsed time.
147 static bool first_time = true;
149 last_time_stamp.stamp();
153 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
154 if ( throttle_hz > 0.0 && !wait_for_scenery ) {
155 // optionally throttle the frame rate (to get consistent frame
156 // rates or reduce cpu usage.
158 double frame_us = 1000000.0 / throttle_hz;
160 #define FG_SLEEP_BASED_TIMING 1
161 #if defined(FG_SLEEP_BASED_TIMING)
162 // sleep based timing loop.
164 // Calling sleep, even usleep() on linux is less accurate than
165 // we like, but it does free up the cpu for other tasks during
166 // the sleep so it is desirable. Because of the way sleep()
167 // is implemented in consumer operating systems like windows
168 // and linux, you almost always sleep a little longer than the
171 // To combat the problem of sleeping too long, we calculate the
172 // desired wait time and shorten it by 2000us (2ms) to avoid
173 // [hopefully] over-sleep'ing. The 2ms value was arrived at
174 // via experimentation. We follow this up at the end with a
175 // simple busy-wait loop to get the final pause timing exactly
178 // Assuming we don't oversleep by more than 2000us, this
179 // should be a reasonable compromise between sleep based
180 // waiting, and busy waiting.
182 // sleep() will always overshoot by a bit so undersleep by
183 // 2000us in the hopes of never oversleeping.
185 if ( frame_us < 0.0 ) {
188 current_time_stamp.stamp();
190 double elapsed_us = (current_time_stamp - last_time_stamp).toUSecs();
191 if ( elapsed_us < frame_us ) {
192 double requested_us = frame_us - elapsed_us;
193 ulMilliSecondSleep ( (int)(requested_us / 1000.0) ) ;
197 // busy wait timing loop.
199 // This yields the most accurate timing. If the previous
200 // ulMilliSecondSleep() call is omitted this will peg the cpu
201 // (which is just fine if FG is the only app you care about.)
202 current_time_stamp.stamp();
203 SGTimeStamp next_time_stamp = last_time_stamp;
204 next_time_stamp += SGTimeStamp::fromSec(1e-6*frame_us);
205 while ( current_time_stamp < next_time_stamp ) {
206 current_time_stamp.stamp();
209 // run as fast as the app will go
210 current_time_stamp.stamp();
213 real_delta_time_sec = (current_time_stamp - last_time_stamp).toSecs();
215 // Limit the time we need to spend in simulation loops
216 // That means, if the /sim/max-simtime-per-frame value is strictly positive
217 // you can limit the maximum amount of time you will do simulations for
218 // one frame to display. The cpu time spent in simulations code is roughly
219 // at least O(real_delta_time_sec). If this is (due to running debug
220 // builds or valgrind or something different blowing up execution times)
221 // larger than the real time you will no longer get any response
222 // from flightgear. This limits that effect. Just set to property from
223 // your .fgfsrc or commandline ...
224 double dtMax = max_simtime_per_frame->getDoubleValue();
225 if (0 < dtMax && dtMax < real_delta_time_sec)
226 real_delta_time_sec = dtMax;
228 SGSubsystemGroup* fdmGroup =
229 globals->get_subsystem_mgr()->get_group(SGSubsystemMgr::FDM);
230 fdmGroup->set_fixed_update_time(1.0 / model_hz);
232 // round the real time down to a multiple of 1/model-hz.
233 // this way all systems are updated the _same_ amount of dt.
234 static double reminder = 0.0;
235 real_delta_time_sec += reminder;
236 global_multi_loop = long(floor(real_delta_time_sec*model_hz));
237 global_multi_loop = SGMisc<long>::max(0, global_multi_loop);
238 reminder = real_delta_time_sec - double(global_multi_loop)/double(model_hz);
239 real_delta_time_sec = double(global_multi_loop)/double(model_hz);
241 if (clock_freeze->getBoolValue() || wait_for_scenery) {
244 delta_time_sec = real_delta_time_sec;
246 last_time_stamp = current_time_stamp;
247 globals->inc_sim_time_sec( delta_time_sec );
249 // These are useful, especially for Nasal scripts.
250 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
251 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
253 #ifdef FANCY_FRAME_COUNTER
257 static time_t last_time = 0;
258 static int frames = 0;
259 #endif // FANCY_FRAME_COUNTER
261 SGTime *t = globals->get_time_params();
263 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
264 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
267 static bool last_clock_freeze = false;
269 if ( clock_freeze->getBoolValue() ) {
270 // clock freeze requested
271 if ( cur_time_override->getLongValue() == 0 ) {
272 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
273 globals->set_warp( 0 );
276 // no clock freeze requested
277 if ( last_clock_freeze == true ) {
278 // clock just unfroze, let's set warp as the difference
279 // between frozen time and current time so we don't get a
280 // time jump (and corresponding sky object and lighting
282 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
283 fgSetLong( "/sim/time/cur-time-override", 0 );
285 if ( globals->get_warp_delta() != 0 ) {
286 globals->inc_warp( globals->get_warp_delta() );
290 last_clock_freeze = clock_freeze->getBoolValue();
292 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
293 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
294 cur_time_override->getLongValue(),
295 globals->get_warp() );
297 if (globals->get_warp_delta() != 0) {
298 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
302 // update magvar model
303 globals->get_mag()->update( longitude->getDoubleValue()
304 * SGD_DEGREES_TO_RADIANS,
305 latitude->getDoubleValue()
306 * SGD_DEGREES_TO_RADIANS,
307 altitude->getDoubleValue() * SG_FEET_TO_METER,
308 globals->get_time_params()->getJD() );
310 // Calculate frame rate average
311 #ifdef FANCY_FRAME_COUNTER
312 /* old fps calculation */
316 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
317 tmp = general.get_frame(i);
319 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
320 general.set_frame(i+1,tmp);
322 tmp = 1000000.0 / (float)elapsed;
323 general.set_frame(0,tmp);
324 // printf("frame[0] = %.2f\n", general.frames[0]);
326 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
327 // printf("ave = %.2f\n", general.frame_rate);
330 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
331 general.set_frame_rate( frames );
332 fgSetInt("/sim/frame-rate", frames);
333 SG_LOG( SG_ALL, SG_DEBUG,
334 "--> Frame rate is = " << general.get_frame_rate() );
337 last_time = t->get_cur_time();
341 // Update any multiplayer's network queues, the AIMultiplayer
342 // implementation is an AI model and depends on that
343 globals->get_multiplayer_mgr()->Update();
347 if (fgGetBool("/sim/atc/enabled"))
348 globals->get_ATC_mgr()->update(delta_time_sec);
351 // Run the AI subsystem
352 // FIXME: run that also if we have multiplaying enabled since the
353 // multiplayer information is interpreted by an AI model
354 if (fgGetBool("/sim/ai-traffic/enabled"))
355 globals->get_AI_mgr()->update(delta_time_sec);
358 globals->get_subsystem_mgr()->update(delta_time_sec);
359 globals->get_aircraft_model()->update(delta_time_sec);
362 // Tile Manager updates - see if we need to load any new scenery tiles.
363 // this code ties together the fdm, viewer and scenery classes...
364 // we may want to move this to its own class at some point
366 double visibility_meters = fgGetDouble("/environment/visibility-m");
367 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
369 // update tile manager for view...
370 SGVec3d viewPos = globals->get_current_view()->get_view_pos();
371 SGGeod geodViewPos = SGGeod::fromCart(viewPos);
372 globals->get_tile_mgr()->update(geodViewPos, visibility_meters);
374 // run Nasal's settimer() loops right before the view manager
375 globals->get_event_mgr()->update(delta_time_sec);
377 // pick up model coordidnates that Nasal code may have set relative to the
379 globals->get_model_mgr()->update(delta_time_sec);
381 // update the view angle as late as possible, but before sound calculations
382 globals->get_viewmgr()->update(real_delta_time_sec);
384 // Update the sound manager last so it can use the CPU while the GPU
385 // is processing the scenery (doubled the frame-rate for me) -EMH-
386 #ifdef ENABLE_AUDIO_SUPPORT
387 static bool smgr_init = true;
388 static SGPropertyNode *sound_working = fgGetNode("/sim/sound/working");
389 if (smgr_init == true) {
390 if (sound_working->getBoolValue() == true) {
391 fgInitSoundManager();
395 static SGPropertyNode *sound_enabled = fgGetNode("/sim/sound/enabled");
396 static SGSoundMgr *smgr = globals->get_soundmgr();
397 static bool smgr_enabled = true;
399 if (sound_working->getBoolValue() == false) { // request to reinit
402 sound_working->setBoolValue(true);
405 if (smgr_enabled != sound_enabled->getBoolValue()) {
406 if (smgr_enabled == true) { // request to suspend
408 smgr_enabled = false;
415 if (smgr_enabled == true) {
416 static SGPropertyNode *volume = fgGetNode("/sim/sound/volume");
417 smgr->set_volume(volume->getFloatValue());
418 smgr->update(delta_time_sec);
423 // END Tile Manager udpates
425 if (!scenery_loaded && globals->get_tile_mgr()->isSceneryLoaded()
426 && fgGetBool("sim/signals/fdm-initialized")) {
427 fgSetBool("sim/sceneryloaded",true);
428 if (fgGetBool("/sim/sound/working")) {
429 globals->get_soundmgr()->activate();
431 globals->get_props()->tie("/sim/sound/devices/name",
432 SGRawValueFunctions<const char *>(0, fgSetNewSoundDevice), false);
434 simgear::AtomicChangeListener::fireChangeListeners();
437 SG_LOG( SG_ALL, SG_DEBUG, "" );
440 void fgInitSoundManager()
442 SGSoundMgr *smgr = globals->get_soundmgr();
445 smgr->init(fgGetString("/sim/sound/device-name", NULL));
447 vector <const char*>devices = smgr->get_available_devices();
448 for (unsigned int i=0; i<devices.size(); i++) {
449 SGPropertyNode *p = fgGetNode("/sim/sound/devices/device", i, true);
450 p->setStringValue(devices[i]);
455 void fgSetNewSoundDevice(const char *device)
457 globals->get_soundmgr()->suspend();
458 globals->get_soundmgr()->stop();
459 globals->get_soundmgr()->init(device);
460 globals->get_soundmgr()->resume();
463 // Operation for querying OpenGL parameters. This must be done in a
464 // valid OpenGL context, potentially in another thread.
467 struct GeneralInitOperation : public GraphicsContextOperation
469 GeneralInitOperation()
470 : GraphicsContextOperation(std::string("General init"))
473 void run(osg::GraphicsContext* gc)
475 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
476 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
477 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
478 SG_LOG( SG_GENERAL, SG_INFO, general.get_glVendor() );
479 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
480 SG_LOG( SG_GENERAL, SG_INFO, general.get_glVersion() );
483 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
484 general.set_glMaxTexSize( tmp );
485 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
487 glGetIntegerv( GL_DEPTH_BITS, &tmp );
488 general.set_glDepthBits( tmp );
489 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
494 // This is the top level master main function that is registered as
497 // The first few passes take care of initialization things (a couple
498 // per pass) and once everything has been initialized fgMainLoop from
501 static void fgIdleFunction ( void ) {
502 static osg::ref_ptr<GeneralInitOperation> genOp;
503 if ( idle_state == 0 ) {
505 // Pick some window on which to do queries.
506 // XXX Perhaps all this graphics initialization code should be
507 // moved to renderer.cxx?
508 genOp = new GeneralInitOperation;
509 osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
510 WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
511 osg::GraphicsContext* gc = 0;
513 gc = guiCamera->getGraphicsContext();
515 gc->add(genOp.get());
517 wsa->windows[0]->gc->add(genOp.get());
520 } else if ( idle_state == 1 ) {
522 if (!genOp->isFinished())
526 if (!guiFinishInit())
529 fgSplashProgress("reading aircraft list");
532 } else if ( idle_state == 2 ) {
534 // Read the list of available aircraft
536 fgSplashProgress("reading airport & navigation data");
539 } else if ( idle_state == 3 ) {
542 fgSplashProgress("setting up scenery");
545 } else if ( idle_state == 4 ) {
547 // based on the requested presets, calculate the true starting
550 fgInitTowerLocationListener();
552 SGTime *t = fgInitTime();
553 globals->set_time_params( t );
555 // Do some quick general initializations
556 if( !fgInitGeneral()) {
557 SG_LOG( SG_GENERAL, SG_ALERT,
558 "General initialization failed ..." );
562 ////////////////////////////////////////////////////////////////////
563 // Initialize the property-based built-in commands
564 ////////////////////////////////////////////////////////////////////
568 ////////////////////////////////////////////////////////////////////
569 // Initialize the material manager
570 ////////////////////////////////////////////////////////////////////
571 globals->set_matlib( new SGMaterialLib );
572 simgear::SGModelLib::init(globals->get_fg_root());
575 ////////////////////////////////////////////////////////////////////
576 // Initialize the TG scenery subsystem.
577 ////////////////////////////////////////////////////////////////////
578 globals->set_scenery( new FGScenery );
579 globals->get_scenery()->init();
580 globals->get_scenery()->bind();
581 globals->set_tile_mgr( new FGTileMgr );
584 ////////////////////////////////////////////////////////////////////
585 // Initialize the general model subsystem.
586 ////////////////////////////////////////////////////////////////////
587 globals->set_model_mgr(new FGModelMgr);
588 globals->get_model_mgr()->init();
589 globals->get_model_mgr()->bind();
590 fgSplashProgress("loading aircraft");
593 } else if ( idle_state == 5 ) {
596 ////////////////////////////////////////////////////////////////////
597 // Initialize the 3D aircraft model subsystem (has a dependency on
598 // the scenery subsystem.)
599 ////////////////////////////////////////////////////////////////////
600 FGAircraftModel* acm = new FGAircraftModel;
601 globals->set_aircraft_model(acm);
602 //globals->add_subsystem("aircraft-model", acm);
606 ////////////////////////////////////////////////////////////////////
607 // Initialize the view manager subsystem.
608 ////////////////////////////////////////////////////////////////////
609 FGViewMgr *viewmgr = new FGViewMgr;
610 globals->set_viewmgr( viewmgr );
613 fgSplashProgress("generating sky elements");
616 } else if ( idle_state == 6 ) {
618 // Initialize the sky
620 Ephemeris* eph = new Ephemeris;
621 globals->add_subsystem("ephmeris", eph);
622 eph->init(); // FIXME - remove this once SGSky code below is also a subsystem
624 // TODO: move to environment mgr
626 SGPath texture_path(globals->get_fg_root());
627 texture_path.append("Textures");
628 texture_path.append("Sky");
629 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
630 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
631 thesky->add_cloud_layer(layer);
634 SGPath sky_tex_path( globals->get_fg_root() );
635 sky_tex_path.append( "Textures" );
636 sky_tex_path.append( "Sky" );
637 thesky->texture_path( sky_tex_path.str() );
639 // The sun and moon diameters are scaled down numbers of the
640 // actual diameters. This was needed to fit both the sun and the
641 // moon within the distance to the far clip plane.
642 // Moon diameter: 3,476 kilometers
643 // Sun diameter: 1,390,000 kilometers
644 thesky->build( 80000.0, 80000.0,
646 *globals->get_ephem(),
647 fgGetNode("/environment", true));
649 // Initialize MagVar model
650 SGMagVar *magvar = new SGMagVar();
651 globals->set_mag( magvar );
654 // kludge to initialize mag compass
655 // (should only be done for in-flight
657 // update magvar model
658 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
659 * SGD_DEGREES_TO_RADIANS,
660 fgGetDouble("/position/latitude-deg")
661 * SGD_DEGREES_TO_RADIANS,
662 fgGetDouble("/position/altitude-ft")
664 globals->get_time_params()->getJD() );
665 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
666 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
667 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
670 // airport = new ssgBranch;
671 // airport->setName( "Airport Lighting" );
672 // lighting->addKid( airport );
674 // build our custom render states
675 fgSplashProgress("initializing subsystems");
678 } else if ( idle_state == 7 ) {
680 // Initialize audio support
681 #ifdef ENABLE_AUDIO_SUPPORT
683 // Start the intro music
684 if ( fgGetBool("/sim/startup/intro-music") ) {
685 SGPath mp3file( globals->get_fg_root() );
686 mp3file.append( "Sounds/intro.mp3" );
688 SG_LOG( SG_GENERAL, SG_INFO,
689 "Starting intro music: " << mp3file.str() );
691 # if defined( __CYGWIN__ )
692 string command = "start /m `cygpath -w " + mp3file.str() + "`";
693 # elif defined( _WIN32 )
694 string command = "start /m " + mp3file.str();
696 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
699 system ( command.c_str() );
702 // This is the top level init routine which calls all the
703 // other subsystem initialization routines. If you are adding
704 // a subsystem to flightgear, its initialization call should be
705 // located in this routine.
706 if( !fgInitSubsystems()) {
707 SG_LOG( SG_GENERAL, SG_ALERT,
708 "Subsystem initialization failed ..." );
711 fgSplashProgress("setting up time & renderer");
714 } else if ( idle_state == 8 ) {
716 // Initialize the time offset (warp) after fgInitSubsystem
717 // (which initializes the lighting interpolation tables.)
720 // setup OpenGL view parameters
721 globals->get_renderer()->init();
723 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
724 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
725 fgGetInt("/sim/startup/ysize") );
727 fgSplashProgress("loading scenery objects");
728 int session = fgGetInt("/sim/session",0);
730 fgSetInt("/sim/session",session);
733 if ( idle_state == 1000 ) {
734 // We've finished all our initialization steps, from now on we
735 // run the main loop.
736 fgSetBool("sim/sceneryloaded", false);
737 fgRegisterIdleHandler( fgMainLoop );
742 static void upper_case_property(const char *name)
744 using namespace simgear;
745 SGPropertyNode *p = fgGetNode(name, false);
747 p = fgGetNode(name, true);
748 p->setStringValue("");
750 props::Type t = p->getType();
751 if (t == props::NONE || t == props::UNSPECIFIED)
752 p->setStringValue("");
754 assert(t == props::STRING);
756 p->addChangeListener(new FGMakeUpperCase);
760 // Main top level initialization
761 bool fgMainInit( int argc, char **argv ) {
763 // set default log levels
764 sglog().setLogLevels( SG_ALL, SG_ALERT );
767 #ifdef FLIGHTGEAR_VERSION
768 version = FLIGHTGEAR_VERSION;
770 version = "unknown version";
772 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
774 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
776 // Allocate global data structures. This needs to happen before
777 // we parse command line options
779 globals = new FGGlobals;
781 // seed the random number generator
784 FGControls *controls = new FGControls;
785 globals->set_controls( controls );
787 string_list *col = new string_list;
788 globals->set_channel_options_list( col );
790 fgValidatePath("", false); // initialize static variables
791 upper_case_property("/sim/presets/airport-id");
792 upper_case_property("/sim/presets/runway");
793 upper_case_property("/sim/tower/airport-id");
794 upper_case_property("/autopilot/route-manager/input");
796 // Scan the config file(s) and command line options to see if
797 // fg_root was specified (ignore all other options for now)
798 fgInitFGRoot(argc, argv);
800 // Check for the correct base package version
801 static char required_version[] = "2.0.0";
802 string base_version = fgBasePackageVersion();
803 if ( !(base_version == required_version) ) {
804 // tell the operator how to use this application
806 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
807 cerr << endl << "Base package check failed ... " \
808 << "Found version " << base_version << " at: " \
809 << globals->get_fg_root() << endl;
810 cerr << "Please upgrade to version: " << required_version << endl;
812 cerr << "Hit a key to continue..." << endl;
818 // Load the configuration parameters. (Command line options
819 // override config file options. Config file options override
821 if ( !fgInitConfig(argc, argv) ) {
822 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
826 // Initialize the Window/Graphics environment.
827 fgOSInit(&argc, argv);
830 fgRegisterWindowResizeHandler( &FGRenderer::resize );
831 fgRegisterIdleHandler( &fgIdleFunction );
832 fgRegisterDrawHandler( &FGRenderer::update );
834 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
835 bool get_stencil_buffer = true;
837 bool get_stencil_buffer = false;
840 // Initialize plib net interface
841 netInit( &argc, argv );
843 // Clouds3D requires an alpha channel
844 // clouds may require stencil buffer
845 fgOSOpenWindow(get_stencil_buffer);
847 // Initialize the splash screen right away
851 // pass control off to the master event handler
854 // we never actually get here ... but to avoid compiler warnings,