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 fgInitSoundManager();
108 void fgSetNewSoundDevice(const char *);
110 // The atexit() function handler should know when the graphical subsystem
112 extern int _bootstrap_OSInit;
116 // Update internal time dependent calculations (i.e. flight model)
117 // FIXME: this distinction is obsolete; all subsystems now get delta
119 void fgUpdateTimeDepCalcs() {
120 static bool inited = false;
122 static const SGPropertyNode *replay_state
123 = fgGetNode( "/sim/freeze/replay-state", true );
124 static SGPropertyNode *replay_time
125 = fgGetNode( "/sim/replay/time", true );
126 // static const SGPropertyNode *replay_end_time
127 // = fgGetNode( "/sim/replay/end-time", true );
129 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
131 // Initialize the FDM here if it hasn't been and if we have a
132 // scenery elevation hit.
134 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
135 // << " cur_elev = " << scenery.get_cur_elev() << endl;
137 if (!cur_fdm_state->get_inited()) {
138 // Check for scenery around the aircraft.
139 double lon = fgGetDouble("/sim/presets/longitude-deg");
140 double lat = fgGetDouble("/sim/presets/latitude-deg");
141 // We require just to have 50 meter scenery availabe around
143 double range = 1000.0;
144 SGGeod geod = SGGeod::fromDeg(lon, lat);
145 if (globals->get_scenery()->scenery_available(geod, range)) {
146 //SG_LOG(SG_FLIGHT, SG_INFO, "Finally initializing fdm");
147 cur_fdm_state->init();
148 if ( cur_fdm_state->get_bound() ) {
149 cur_fdm_state->unbind();
151 cur_fdm_state->bind();
155 // conceptually, the following block could be done for each fdm
157 if ( cur_fdm_state->get_inited() ) {
158 // we have been inited, and we are good to go ...
160 if ( replay_state->getIntValue() == 0 ) {
161 // replay off, run fdm
162 cur_fdm_state->update( delta_time_sec );
164 FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
165 r->replay( replay_time->getDoubleValue() );
166 if ( replay_state->getIntValue() == 1 ) {
168 replay_time->setDoubleValue( replay_time->getDoubleValue()
170 * fgGetInt("/sim/speed-up") ) );
171 } else if ( replay_state->getIntValue() == 2 ) {
172 // paused playback (don't advance replay time)
178 fgSetBool("/sim/signals/fdm-initialized", true);
182 // do nothing, fdm isn't inited yet
185 globals->get_aircraft_model()->update(delta_time_sec);
187 // Update solar system
188 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
189 globals->get_time_params()->getLst(),
190 cur_fdm_state->get_Latitude() );
195 // What should we do when we have nothing else to do? Let's get ready
196 // for the next move and update the display?
197 static void fgMainLoop( void ) {
198 int model_hz = fgGetInt("/sim/model-hz");
200 static SGConstPropertyNode_ptr longitude
201 = fgGetNode("/position/longitude-deg");
202 static SGConstPropertyNode_ptr latitude
203 = fgGetNode("/position/latitude-deg");
204 static SGConstPropertyNode_ptr altitude
205 = fgGetNode("/position/altitude-ft");
206 static SGConstPropertyNode_ptr vn_fps
207 = fgGetNode("/velocities/speed-north-fps");
208 static SGConstPropertyNode_ptr ve_fps
209 = fgGetNode("/velocities/speed-east-fps");
210 static SGConstPropertyNode_ptr vd_fps
211 = fgGetNode("/velocities/speed-down-fps");
212 static SGConstPropertyNode_ptr clock_freeze
213 = fgGetNode("/sim/freeze/clock", true);
214 static SGConstPropertyNode_ptr cur_time_override
215 = fgGetNode("/sim/time/cur-time-override", true);
216 static SGConstPropertyNode_ptr max_simtime_per_frame
217 = fgGetNode("/sim/max-simtime-per-frame", true);
218 static SGPropertyNode_ptr frame_signal
219 = fgGetNode("/sim/signals/frame", true);
221 frame_signal->fireValueChanged();
222 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
224 bool scenery_loaded = fgGetBool("sim/sceneryloaded");
225 bool wait_for_scenery = !(scenery_loaded || fgGetBool("sim/sceneryloaded-override"));
227 // Update the elapsed time.
228 static bool first_time = true;
230 last_time_stamp.stamp();
234 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
235 if ( throttle_hz > 0.0 && !wait_for_scenery ) {
236 // optionally throttle the frame rate (to get consistent frame
237 // rates or reduce cpu usage.
239 double frame_us = 1000000.0 / throttle_hz;
241 #define FG_SLEEP_BASED_TIMING 1
242 #if defined(FG_SLEEP_BASED_TIMING)
243 // sleep based timing loop.
245 // Calling sleep, even usleep() on linux is less accurate than
246 // we like, but it does free up the cpu for other tasks during
247 // the sleep so it is desirable. Because of the way sleep()
248 // is implemented in consumer operating systems like windows
249 // and linux, you almost always sleep a little longer than the
252 // To combat the problem of sleeping too long, we calculate the
253 // desired wait time and shorten it by 2000us (2ms) to avoid
254 // [hopefully] over-sleep'ing. The 2ms value was arrived at
255 // via experimentation. We follow this up at the end with a
256 // simple busy-wait loop to get the final pause timing exactly
259 // Assuming we don't oversleep by more than 2000us, this
260 // should be a reasonable compromise between sleep based
261 // waiting, and busy waiting.
263 // sleep() will always overshoot by a bit so undersleep by
264 // 2000us in the hopes of never oversleeping.
266 if ( frame_us < 0.0 ) {
269 current_time_stamp.stamp();
271 double elapsed_us = (current_time_stamp - last_time_stamp).toUSecs();
272 if ( elapsed_us < frame_us ) {
273 double requested_us = frame_us - elapsed_us;
274 ulMilliSecondSleep ( (int)(requested_us / 1000.0) ) ;
278 // busy wait timing loop.
280 // This yields the most accurate timing. If the previous
281 // ulMilliSecondSleep() call is omitted this will peg the cpu
282 // (which is just fine if FG is the only app you care about.)
283 current_time_stamp.stamp();
284 SGTimeStamp next_time_stamp = last_time_stamp;
285 next_time_stamp += SGTimeStamp::fromSec(1e-6*frame_us);
286 while ( current_time_stamp < next_time_stamp ) {
287 current_time_stamp.stamp();
290 // run as fast as the app will go
291 current_time_stamp.stamp();
294 real_delta_time_sec = (current_time_stamp - last_time_stamp).toSecs();
296 // Limit the time we need to spend in simulation loops
297 // That means, if the /sim/max-simtime-per-frame value is strictly positive
298 // you can limit the maximum amount of time you will do simulations for
299 // one frame to display. The cpu time spent in simulations code is roughly
300 // at least O(real_delta_time_sec). If this is (due to running debug
301 // builds or valgrind or something different blowing up execution times)
302 // larger than the real time you will no longer get any response
303 // from flightgear. This limits that effect. Just set to property from
304 // your .fgfsrc or commandline ...
305 double dtMax = max_simtime_per_frame->getDoubleValue();
306 if (0 < dtMax && dtMax < real_delta_time_sec)
307 real_delta_time_sec = dtMax;
309 // round the real time down to a multiple of 1/model-hz.
310 // this way all systems are updated the _same_ amount of dt.
311 static double reminder = 0.0;
312 real_delta_time_sec += reminder;
313 global_multi_loop = long(floor(real_delta_time_sec*model_hz));
314 global_multi_loop = SGMisc<long>::max(0, global_multi_loop);
315 reminder = real_delta_time_sec - double(global_multi_loop)/double(model_hz);
316 real_delta_time_sec = double(global_multi_loop)/double(model_hz);
318 if (clock_freeze->getBoolValue() || wait_for_scenery) {
321 delta_time_sec = real_delta_time_sec;
323 last_time_stamp = current_time_stamp;
324 globals->inc_sim_time_sec( delta_time_sec );
326 // These are useful, especially for Nasal scripts.
327 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
328 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
330 #ifdef FANCY_FRAME_COUNTER
334 static time_t last_time = 0;
335 static int frames = 0;
336 #endif // FANCY_FRAME_COUNTER
338 SGTime *t = globals->get_time_params();
340 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
341 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
343 // Fix elevation. I'm just sticking this here for now, it should
344 // probably move eventually
346 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
347 scenery.get_cur_elev(),
348 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
349 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
351 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
352 scenery.get_cur_elev(),
353 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
354 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
356 // cout << "Warp = " << globals->get_warp() << endl;
359 static bool last_clock_freeze = false;
361 if ( clock_freeze->getBoolValue() ) {
362 // clock freeze requested
363 if ( cur_time_override->getLongValue() == 0 ) {
364 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
365 globals->set_warp( 0 );
368 // no clock freeze requested
369 if ( last_clock_freeze == true ) {
370 // clock just unfroze, let's set warp as the difference
371 // between frozen time and current time so we don't get a
372 // time jump (and corresponding sky object and lighting
374 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
375 fgSetLong( "/sim/time/cur-time-override", 0 );
377 if ( globals->get_warp_delta() != 0 ) {
378 globals->inc_warp( globals->get_warp_delta() );
382 last_clock_freeze = clock_freeze->getBoolValue();
384 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
385 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
386 cur_time_override->getLongValue(),
387 globals->get_warp() );
389 if (globals->get_warp_delta() != 0) {
390 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
394 // update magvar model
395 globals->get_mag()->update( longitude->getDoubleValue()
396 * SGD_DEGREES_TO_RADIANS,
397 latitude->getDoubleValue()
398 * SGD_DEGREES_TO_RADIANS,
399 altitude->getDoubleValue() * SG_FEET_TO_METER,
400 globals->get_time_params()->getJD() );
402 // Calculate frame rate average
403 #ifdef FANCY_FRAME_COUNTER
404 /* old fps calculation */
408 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
409 tmp = general.get_frame(i);
411 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
412 general.set_frame(i+1,tmp);
414 tmp = 1000000.0 / (float)elapsed;
415 general.set_frame(0,tmp);
416 // printf("frame[0] = %.2f\n", general.frames[0]);
418 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
419 // printf("ave = %.2f\n", general.frame_rate);
422 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
423 general.set_frame_rate( frames );
424 fgSetInt("/sim/frame-rate", frames);
425 SG_LOG( SG_ALL, SG_DEBUG,
426 "--> Frame rate is = " << general.get_frame_rate() );
429 last_time = t->get_cur_time();
433 // Update any multiplayer's network queues, the AIMultiplayer
434 // implementation is an AI model and depends on that
435 globals->get_multiplayer_mgr()->Update();
438 if (fgGetBool("/sim/atc/enabled"))
439 globals->get_ATC_mgr()->update(delta_time_sec);
441 // Run the AI subsystem
442 // FIXME: run that also if we have multiplaying enabled since the
443 // multiplayer information is interpreted by an AI model
444 if (fgGetBool("/sim/ai-traffic/enabled"))
445 globals->get_AI_mgr()->update(delta_time_sec);
448 if (0 < global_multi_loop) {
449 // first run the flight model each frame until it is initialized
450 // then continue running each frame only after initial scenery
452 fgUpdateTimeDepCalcs();
454 SG_LOG( SG_ALL, SG_DEBUG,
455 "Elapsed time is zero ... we're zinging" );
458 globals->get_subsystem_mgr()->update(delta_time_sec);
461 // Tile Manager updates - see if we need to load any new scenery tiles.
462 // this code ties together the fdm, viewer and scenery classes...
463 // we may want to move this to its own class at some point
465 double visibility_meters = fgGetDouble("/environment/visibility-m");
466 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
468 // update tile manager for view...
469 SGVec3d viewPos = globals->get_current_view()->get_view_pos();
470 SGGeod geodViewPos = SGGeod::fromCart(viewPos);
471 globals->get_tile_mgr()->update(geodViewPos, visibility_meters);
473 // run Nasal's settimer() loops right before the view manager
474 globals->get_event_mgr()->update(delta_time_sec);
476 // pick up model coordidnates that Nasal code may have set relative to the
478 globals->get_model_mgr()->update(delta_time_sec);
480 // update the view angle as late as possible, but before sound calculations
481 globals->get_viewmgr()->update(real_delta_time_sec);
483 // Update the sound manager last so it can use the CPU while the GPU
484 // is processing the scenery (doubled the frame-rate for me) -EMH-
485 #ifdef ENABLE_AUDIO_SUPPORT
486 static bool smgr_init = true;
487 if (smgr_init == true) {
488 static SGPropertyNode *sound_working = fgGetNode("/sim/sound/working");
489 if (sound_working->getBoolValue() == true) {
490 fgInitSoundManager();
494 static SGPropertyNode *sound_enabled = fgGetNode("/sim/sound/enabled");
495 static SGSoundMgr *smgr = globals->get_soundmgr();
496 static bool smgr_enabled = true;
498 if (smgr_enabled != sound_enabled->getBoolValue()) {
499 if (smgr_enabled == true) { // request to suspend
501 smgr_enabled = false;
508 if (smgr_enabled == true) {
509 static SGPropertyNode *volume = fgGetNode("/sim/sound/volume");
510 smgr->set_volume(volume->getFloatValue());
511 smgr->update(delta_time_sec);
516 // END Tile Manager udpates
518 if (!scenery_loaded && globals->get_tile_mgr()->isSceneryLoaded()
519 && cur_fdm_state->get_inited()) {
520 fgSetBool("sim/sceneryloaded",true);
521 if (fgGetBool("/sim/sound/working")) {
522 globals->get_soundmgr()->activate();
524 globals->get_props()->tie("/sim/sound/devices/name",
525 SGRawValueFunctions<const char *>(0, fgSetNewSoundDevice), false);
530 SG_LOG( SG_ALL, SG_DEBUG, "" );
533 void fgInitSoundManager()
535 SGSoundMgr *smgr = globals->get_soundmgr();
538 smgr->init(fgGetString("/sim/sound/device-name", NULL));
540 vector <const char*>devices = smgr->get_available_devices();
541 for (unsigned int i=0; i<devices.size(); i++) {
542 SGPropertyNode *p = fgGetNode("/sim/sound/devices/device", i, true);
543 p->setStringValue(devices[i]);
548 void fgSetNewSoundDevice(const char *device)
550 globals->get_soundmgr()->suspend();
551 globals->get_soundmgr()->stop();
552 globals->get_soundmgr()->init(device);
553 globals->get_soundmgr()->resume();
556 // Operation for querying OpenGL parameters. This must be done in a
557 // valid OpenGL context, potentially in another thread.
560 struct GeneralInitOperation : public GraphicsContextOperation
562 GeneralInitOperation()
563 : GraphicsContextOperation(std::string("General init"))
566 void run(osg::GraphicsContext* gc)
568 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
569 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
570 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
571 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
574 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
575 general.set_glMaxTexSize( tmp );
576 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
578 glGetIntegerv( GL_DEPTH_BITS, &tmp );
579 general.set_glDepthBits( tmp );
580 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
585 // This is the top level master main function that is registered as
588 // The first few passes take care of initialization things (a couple
589 // per pass) and once everything has been initialized fgMainLoop from
592 static void fgIdleFunction ( void ) {
593 static osg::ref_ptr<GeneralInitOperation> genOp;
594 if ( idle_state == 0 ) {
596 // Pick some window on which to do queries.
597 // XXX Perhaps all this graphics initialization code should be
598 // moved to renderer.cxx?
599 genOp = new GeneralInitOperation;
600 osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
601 WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
602 osg::GraphicsContext* gc = 0;
604 gc = guiCamera->getGraphicsContext();
606 gc->add(genOp.get());
608 wsa->windows[0]->gc->add(genOp.get());
611 } else if ( idle_state == 1 ) {
613 if (!genOp->isFinished())
617 if (!guiFinishInit())
620 fgSplashProgress("reading aircraft list");
623 } else if ( idle_state == 2 ) {
625 // Read the list of available aircraft
627 fgSplashProgress("reading airport & navigation data");
630 } else if ( idle_state == 3 ) {
633 fgSplashProgress("setting up scenery");
636 } else if ( idle_state == 4 ) {
638 // based on the requested presets, calculate the true starting
641 fgInitTowerLocationListener();
643 SGTime *t = fgInitTime();
644 globals->set_time_params( t );
646 // Do some quick general initializations
647 if( !fgInitGeneral()) {
648 SG_LOG( SG_GENERAL, SG_ALERT,
649 "General initialization failed ..." );
653 ////////////////////////////////////////////////////////////////////
654 // Initialize the property-based built-in commands
655 ////////////////////////////////////////////////////////////////////
659 ////////////////////////////////////////////////////////////////////
660 // Initialize the material manager
661 ////////////////////////////////////////////////////////////////////
662 globals->set_matlib( new SGMaterialLib );
663 simgear::SGModelLib::init(globals->get_fg_root());
666 ////////////////////////////////////////////////////////////////////
667 // Initialize the TG scenery subsystem.
668 ////////////////////////////////////////////////////////////////////
669 globals->set_scenery( new FGScenery );
670 globals->get_scenery()->init();
671 globals->get_scenery()->bind();
672 globals->set_tile_mgr( new FGTileMgr );
675 ////////////////////////////////////////////////////////////////////
676 // Initialize the general model subsystem.
677 ////////////////////////////////////////////////////////////////////
678 globals->set_model_mgr(new FGModelMgr);
679 globals->get_model_mgr()->init();
680 globals->get_model_mgr()->bind();
681 fgSplashProgress("loading aircraft");
684 } else if ( idle_state == 5 ) {
687 ////////////////////////////////////////////////////////////////////
688 // Initialize the 3D aircraft model subsystem (has a dependency on
689 // the scenery subsystem.)
690 ////////////////////////////////////////////////////////////////////
691 globals->set_aircraft_model(new FGAircraftModel);
692 globals->get_aircraft_model()->init();
693 globals->get_aircraft_model()->bind();
695 ////////////////////////////////////////////////////////////////////
696 // Initialize the view manager subsystem.
697 ////////////////////////////////////////////////////////////////////
698 FGViewMgr *viewmgr = new FGViewMgr;
699 globals->set_viewmgr( viewmgr );
702 fgSplashProgress("generating sky elements");
705 } else if ( idle_state == 6 ) {
707 // Initialize the sky
708 SGPath ephem_data_path( globals->get_fg_root() );
709 ephem_data_path.append( "Astro" );
710 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
711 ephem->update( globals->get_time_params()->getMjd(),
712 globals->get_time_params()->getLst(),
714 globals->set_ephem( ephem );
716 // TODO: move to environment mgr
718 SGPath texture_path(globals->get_fg_root());
719 texture_path.append("Textures");
720 texture_path.append("Sky");
721 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
722 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
723 thesky->add_cloud_layer(layer);
726 SGPath sky_tex_path( globals->get_fg_root() );
727 sky_tex_path.append( "Textures" );
728 sky_tex_path.append( "Sky" );
729 thesky->texture_path( sky_tex_path.str() );
731 // The sun and moon diameters are scaled down numbers of the
732 // actual diameters. This was needed to fit both the sun and the
733 // moon within the distance to the far clip plane.
734 // Moon diameter: 3,476 kilometers
735 // Sun diameter: 1,390,000 kilometers
736 thesky->build( 80000.0, 80000.0,
738 *globals->get_ephem(),
739 fgGetNode("/environment", true));
741 // Initialize MagVar model
742 SGMagVar *magvar = new SGMagVar();
743 globals->set_mag( magvar );
746 // kludge to initialize mag compass
747 // (should only be done for in-flight
749 // update magvar model
750 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
751 * SGD_DEGREES_TO_RADIANS,
752 fgGetDouble("/position/latitude-deg")
753 * SGD_DEGREES_TO_RADIANS,
754 fgGetDouble("/position/altitude-ft")
756 globals->get_time_params()->getJD() );
757 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
758 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
759 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
762 // airport = new ssgBranch;
763 // airport->setName( "Airport Lighting" );
764 // lighting->addKid( airport );
766 // build our custom render states
767 fgSplashProgress("initializing subsystems");
770 } else if ( idle_state == 7 ) {
772 // Initialize audio support
773 #ifdef ENABLE_AUDIO_SUPPORT
775 // Start the intro music
776 if ( fgGetBool("/sim/startup/intro-music") ) {
777 SGPath mp3file( globals->get_fg_root() );
778 mp3file.append( "Sounds/intro.mp3" );
780 SG_LOG( SG_GENERAL, SG_INFO,
781 "Starting intro music: " << mp3file.str() );
783 # if defined( __CYGWIN__ )
784 string command = "start /m `cygpath -w " + mp3file.str() + "`";
785 # elif defined( WIN32 )
786 string command = "start /m " + mp3file.str();
788 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
791 system ( command.c_str() );
794 // This is the top level init routine which calls all the
795 // other subsystem initialization routines. If you are adding
796 // a subsystem to flightgear, its initialization call should be
797 // located in this routine.
798 if( !fgInitSubsystems()) {
799 SG_LOG( SG_GENERAL, SG_ALERT,
800 "Subsystem initialization failed ..." );
803 fgSplashProgress("setting up time & renderer");
806 } else if ( idle_state == 8 ) {
808 // Initialize the time offset (warp) after fgInitSubsystem
809 // (which initializes the lighting interpolation tables.)
812 // setup OpenGL view parameters
813 globals->get_renderer()->init();
815 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
816 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
817 fgGetInt("/sim/startup/ysize") );
819 fgSplashProgress("loading scenery objects");
823 if ( idle_state == 1000 ) {
824 // We've finished all our initialization steps, from now on we
825 // run the main loop.
826 fgSetBool("sim/sceneryloaded", false);
827 fgRegisterIdleHandler( fgMainLoop );
832 static void upper_case_property(const char *name)
834 using namespace simgear;
835 SGPropertyNode *p = fgGetNode(name, false);
837 p = fgGetNode(name, true);
838 p->setStringValue("");
840 props::Type t = p->getType();
841 if (t == props::NONE || t == props::UNSPECIFIED)
842 p->setStringValue("");
844 assert(t == props::STRING);
846 p->addChangeListener(new FGMakeUpperCase);
850 // Main top level initialization
851 bool fgMainInit( int argc, char **argv ) {
853 // set default log levels
854 sglog().setLogLevels( SG_ALL, SG_ALERT );
857 #ifdef FLIGHTGEAR_VERSION
858 version = FLIGHTGEAR_VERSION;
860 version = "unknown version";
862 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
864 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
866 // Allocate global data structures. This needs to happen before
867 // we parse command line options
869 globals = new FGGlobals;
871 // seed the random number generator
874 FGControls *controls = new FGControls;
875 globals->set_controls( controls );
877 string_list *col = new string_list;
878 globals->set_channel_options_list( col );
880 fgValidatePath("", false); // initialize static variables
881 upper_case_property("/sim/presets/airport-id");
882 upper_case_property("/sim/presets/runway");
883 upper_case_property("/sim/tower/airport-id");
884 upper_case_property("/autopilot/route-manager/input");
886 // Scan the config file(s) and command line options to see if
887 // fg_root was specified (ignore all other options for now)
888 fgInitFGRoot(argc, argv);
890 // Check for the correct base package version
891 static char required_version[] = "1.9.0";
892 string base_version = fgBasePackageVersion();
893 if ( !(base_version == required_version) ) {
894 // tell the operator how to use this application
896 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
897 cerr << endl << "Base package check failed ... " \
898 << "Found version " << base_version << " at: " \
899 << globals->get_fg_root() << endl;
900 cerr << "Please upgrade to version: " << required_version << endl;
902 cerr << "Hit a key to continue..." << endl;
908 // Load the configuration parameters. (Command line options
909 // override config file options. Config file options override
911 if ( !fgInitConfig(argc, argv) ) {
912 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
916 // Initialize the Window/Graphics environment.
917 fgOSInit(&argc, argv);
920 fgRegisterWindowResizeHandler( &FGRenderer::resize );
921 fgRegisterIdleHandler( &fgIdleFunction );
922 fgRegisterDrawHandler( &FGRenderer::update );
924 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
925 bool get_stencil_buffer = true;
927 bool get_stencil_buffer = false;
930 // Initialize plib net interface
931 netInit( &argc, argv );
933 // Clouds3D requires an alpha channel
934 // clouds may require stencil buffer
935 fgOSOpenWindow(get_stencil_buffer);
937 // Initialize the splash screen right away
941 // pass control off to the master event handler
944 // we never actually get here ... but to avoid compiler warnings,