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 vn_fps
212 = fgGetNode("/velocities/speed-north-fps");
213 static SGConstPropertyNode_ptr ve_fps
214 = fgGetNode("/velocities/speed-east-fps");
215 static SGConstPropertyNode_ptr vd_fps
216 = fgGetNode("/velocities/speed-down-fps");
217 static SGConstPropertyNode_ptr clock_freeze
218 = fgGetNode("/sim/freeze/clock", true);
219 static SGConstPropertyNode_ptr cur_time_override
220 = fgGetNode("/sim/time/cur-time-override", true);
221 static SGConstPropertyNode_ptr max_simtime_per_frame
222 = fgGetNode("/sim/max-simtime-per-frame", true);
223 static SGPropertyNode_ptr frame_signal
224 = fgGetNode("/sim/signals/frame", true);
226 frame_signal->fireValueChanged();
227 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
229 bool scenery_loaded = fgGetBool("sim/sceneryloaded");
230 bool wait_for_scenery = !(scenery_loaded || fgGetBool("sim/sceneryloaded-override"));
232 // Update the elapsed time.
233 static bool first_time = true;
235 last_time_stamp.stamp();
239 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
240 if ( throttle_hz > 0.0 && !wait_for_scenery ) {
241 // optionally throttle the frame rate (to get consistent frame
242 // rates or reduce cpu usage.
244 double frame_us = 1000000.0 / throttle_hz;
246 #define FG_SLEEP_BASED_TIMING 1
247 #if defined(FG_SLEEP_BASED_TIMING)
248 // sleep based timing loop.
250 // Calling sleep, even usleep() on linux is less accurate than
251 // we like, but it does free up the cpu for other tasks during
252 // the sleep so it is desirable. Because of the way sleep()
253 // is implemented in consumer operating systems like windows
254 // and linux, you almost always sleep a little longer than the
257 // To combat the problem of sleeping too long, we calculate the
258 // desired wait time and shorten it by 2000us (2ms) to avoid
259 // [hopefully] over-sleep'ing. The 2ms value was arrived at
260 // via experimentation. We follow this up at the end with a
261 // simple busy-wait loop to get the final pause timing exactly
264 // Assuming we don't oversleep by more than 2000us, this
265 // should be a reasonable compromise between sleep based
266 // waiting, and busy waiting.
268 // sleep() will always overshoot by a bit so undersleep by
269 // 2000us in the hopes of never oversleeping.
271 if ( frame_us < 0.0 ) {
274 current_time_stamp.stamp();
276 double elapsed_us = current_time_stamp - last_time_stamp;
277 if ( elapsed_us < frame_us ) {
278 double requested_us = frame_us - elapsed_us;
279 ulMilliSecondSleep ( (int)(requested_us / 1000.0) ) ;
283 // busy wait timing loop.
285 // This yields the most accurate timing. If the previous
286 // ulMilliSecondSleep() call is omitted this will peg the cpu
287 // (which is just fine if FG is the only app you care about.)
288 current_time_stamp.stamp();
289 while ( current_time_stamp - last_time_stamp < frame_us ) {
290 current_time_stamp.stamp();
293 // run as fast as the app will go
294 current_time_stamp.stamp();
298 = double(current_time_stamp - last_time_stamp) / 1000000.0;
300 // Limit the time we need to spend in simulation loops
301 // That means, if the /sim/max-simtime-per-frame value is strictly positive
302 // you can limit the maximum amount of time you will do simulations for
303 // one frame to display. The cpu time spent in simulations code is roughly
304 // at least O(real_delta_time_sec). If this is (due to running debug
305 // builds or valgrind or something different blowing up execution times)
306 // larger than the real time you will no longer get any response
307 // from flightgear. This limits that effect. Just set to property from
308 // your .fgfsrc or commandline ...
309 double dtMax = max_simtime_per_frame->getDoubleValue();
310 if (0 < dtMax && dtMax < real_delta_time_sec)
311 real_delta_time_sec = dtMax;
313 // round the real time down to a multiple of 1/model-hz.
314 // this way all systems are updated the _same_ amount of dt.
316 static double rem = 0.0;
317 real_delta_time_sec += rem;
318 double hz = model_hz;
319 double nit = floor(real_delta_time_sec*hz);
320 rem = real_delta_time_sec - nit/hz;
321 real_delta_time_sec = nit/hz;
325 if (clock_freeze->getBoolValue() || wait_for_scenery) {
328 delta_time_sec = real_delta_time_sec;
330 last_time_stamp = current_time_stamp;
331 globals->inc_sim_time_sec( delta_time_sec );
333 // These are useful, especially for Nasal scripts.
334 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
335 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
337 static long remainder = 0;
339 #ifdef FANCY_FRAME_COUNTER
343 static time_t last_time = 0;
344 static int frames = 0;
345 #endif // FANCY_FRAME_COUNTER
347 SGTime *t = globals->get_time_params();
349 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
350 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
352 // Fix elevation. I'm just sticking this here for now, it should
353 // probably move eventually
355 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
356 scenery.get_cur_elev(),
357 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
358 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
360 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
361 scenery.get_cur_elev(),
362 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
363 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
365 // cout << "Warp = " << globals->get_warp() << endl;
368 static bool last_clock_freeze = false;
370 if ( clock_freeze->getBoolValue() ) {
371 // clock freeze requested
372 if ( cur_time_override->getLongValue() == 0 ) {
373 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
374 globals->set_warp( 0 );
377 // no clock freeze requested
378 if ( last_clock_freeze == true ) {
379 // clock just unfroze, let's set warp as the difference
380 // between frozen time and current time so we don't get a
381 // time jump (and corresponding sky object and lighting
383 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
384 fgSetLong( "/sim/time/cur-time-override", 0 );
386 if ( globals->get_warp_delta() != 0 ) {
387 globals->inc_warp( globals->get_warp_delta() );
391 last_clock_freeze = clock_freeze->getBoolValue();
393 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
394 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
395 cur_time_override->getLongValue(),
396 globals->get_warp() );
398 if (globals->get_warp_delta() != 0) {
399 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
403 // update magvar model
404 globals->get_mag()->update( longitude->getDoubleValue()
405 * SGD_DEGREES_TO_RADIANS,
406 latitude->getDoubleValue()
407 * SGD_DEGREES_TO_RADIANS,
408 altitude->getDoubleValue() * SG_FEET_TO_METER,
409 globals->get_time_params()->getJD() );
411 // Get elapsed time (in usec) for this past frame
412 elapsed = fgGetTimeInterval();
413 SG_LOG( SG_ALL, SG_DEBUG,
414 "Elapsed time interval is = " << elapsed
415 << ", previous remainder is = " << remainder );
417 // Calculate frame rate average
418 #ifdef FANCY_FRAME_COUNTER
419 /* old fps calculation */
423 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
424 tmp = general.get_frame(i);
426 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
427 general.set_frame(i+1,tmp);
429 tmp = 1000000.0 / (float)elapsed;
430 general.set_frame(0,tmp);
431 // printf("frame[0] = %.2f\n", general.frames[0]);
433 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
434 // printf("ave = %.2f\n", general.frame_rate);
437 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
438 general.set_frame_rate( frames );
439 fgSetInt("/sim/frame-rate", frames);
440 SG_LOG( SG_ALL, SG_DEBUG,
441 "--> Frame rate is = " << general.get_frame_rate() );
444 last_time = t->get_cur_time();
448 // Update any multiplayer's network queues, the AIMultiplayer
449 // implementation is an AI model and depends on that
450 globals->get_multiplayer_mgr()->Update();
453 if (fgGetBool("/sim/atc/enabled"))
454 globals->get_ATC_mgr()->update(delta_time_sec);
456 // Run the AI subsystem
457 // FIXME: run that also if we have multiplaying enabled since the
458 // multiplayer information is interpreted by an AI model
459 if (fgGetBool("/sim/ai-traffic/enabled"))
460 globals->get_AI_mgr()->update(delta_time_sec);
464 // Calculate model iterations needed for next frame
465 elapsed += remainder;
467 global_multi_loop = (long)(((double)elapsed * 0.000001) * model_hz );
468 remainder = elapsed - ( (global_multi_loop*1000000) / model_hz );
469 SG_LOG( SG_ALL, SG_DEBUG,
470 "Model iterations needed = " << global_multi_loop
471 << ", new remainder = " << remainder );
473 // chop max iterations to something reasonable if the sim was
474 // delayed for an excessive amount of time
475 if ( global_multi_loop > 2.0 * model_hz ) {
476 global_multi_loop = (int)(2.0 * model_hz );
481 if ( global_multi_loop > 0) {
482 // first run the flight model each frame until it is initialized
483 // then continue running each frame only after initial scenery load is complete.
484 fgUpdateTimeDepCalcs();
486 SG_LOG( SG_ALL, SG_DEBUG,
487 "Elapsed time is zero ... we're zinging" );
490 // Run audio scheduler
491 #ifdef ENABLE_AUDIO_SUPPORT
492 if ( globals->get_soundmgr()->is_working() ) {
493 globals->get_soundmgr()->update( delta_time_sec );
497 globals->get_subsystem_mgr()->update(delta_time_sec);
500 // Tile Manager updates - see if we need to load any new scenery tiles.
501 // this code ties together the fdm, viewer and scenery classes...
502 // we may want to move this to its own class at some point
504 double visibility_meters = fgGetDouble("/environment/visibility-m");
505 FGViewer *current_view = globals->get_current_view();
507 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
508 // update tile manager for view...
509 SGLocation *view_location = globals->get_current_view()->getSGLocation();
510 globals->get_tile_mgr()->update( view_location, visibility_meters );
512 double lon = view_location->getLongitude_deg();
513 double lat = view_location->getLatitude_deg();
514 double alt = view_location->getAltitudeASL_ft() * SG_FEET_TO_METER;
516 // check if we can reuse the groundcache for that purpose.
519 bool valid = cur_fdm_state->is_valid_m(&ref_time, pt.sg(), &r);
520 SGVec3d viewpos(globals->get_current_view()->get_view_pos());
521 if (valid && distSqr(viewpos, pt) < r*r) {
522 // Reuse the cache ...
524 = cur_fdm_state->get_groundlevel_m(lat*SGD_DEGREES_TO_RADIANS,
525 lon*SGD_DEGREES_TO_RADIANS,
527 view_location->set_cur_elev_m( lev );
529 // Do full intersection test.
531 if (globals->get_scenery()->get_elevation_m(lat, lon, alt+2, lev, 0))
532 view_location->set_cur_elev_m( lev );
534 view_location->set_cur_elev_m( -9999.0 );
538 // run Nasal's settimer() loops right before the view manager
539 globals->get_event_mgr()->update(delta_time_sec);
541 // update the view angle as late as possible, but before sound calculations
542 globals->get_viewmgr()->update(delta_time_sec);
544 // Do any I/O channel work that might need to be done (must come after viewmgr)
545 globals->get_io()->update(real_delta_time_sec);
547 #ifdef ENABLE_AUDIO_SUPPORT
548 // Right now we make a simplifying assumption that the primary
549 // aircraft is the source of all sounds and that all sounds are
550 // positioned in the aircraft base
552 static sgdVec3 last_listener_pos = {0, 0, 0};
553 static sgdVec3 last_model_pos = {0, 0, 0};
555 // get the orientation
556 const SGQuatd view_or = current_view->getViewOrientation();
557 SGQuatd surf_or = SGQuatd::fromLonLatDeg(
558 current_view->getLongitude_deg(), current_view->getLatitude_deg());
559 SGQuatd model_or = SGQuatd::fromYawPitchRollDeg(
560 globals->get_aircraft_model()->get3DModel()->getHeadingDeg(),
561 globals->get_aircraft_model()->get3DModel()->getPitchDeg(),
562 globals->get_aircraft_model()->get3DModel()->getRollDeg());
564 // get the up and at vector in the aircraft base
565 // (ok, the up vector is a down vector, but the coordinates
566 // are finally calculated in a left hand system and openal
567 // lives in a right hand system. Therefore we need to pass
568 // the down vector to get correct stereo sound.)
569 SGVec3d sgv_up = model_or.rotateBack(
570 surf_or.rotateBack(view_or.rotate(SGVec3d(0, 1, 0))));
572 sgSetVec3(up, sgv_up[0], sgv_up[1], sgv_up[2]);
573 SGVec3d sgv_at = model_or.rotateBack(
574 surf_or.rotateBack(view_or.rotate(SGVec3d(0, 0, 1))));
576 sgSetVec3(at, sgv_at[0], sgv_at[1], sgv_at[2]);
578 // get the location data for the primary FDM (now hardcoded to ac model)...
579 SGLocation *acmodel_loc = NULL;
580 acmodel_loc = (SGLocation *)globals->
581 get_aircraft_model()->get3DModel()->getSGLocation();
583 // Calculate speed of listener and model. This code assumes the
584 // listener is either tracking the model at the same speed or
587 sgVec3 listener_vel, model_vel;
590 sgdVec3 sgdv3_null = {0, 0, 0};
592 // the aircraft velocity as reported by the fdm (this will not
593 // vary or be affected by frame rates or timing jitter.)
595 sgSetVec3( fdm_vel_vec,
596 vn_fps->getDoubleValue() * SG_FEET_TO_METER,
597 ve_fps->getDoubleValue() * SG_FEET_TO_METER,
598 vd_fps->getDoubleValue() * SG_FEET_TO_METER );
599 double fdm_vel = sgLengthVec3(fdm_vel_vec);
601 // compute the aircraft velocity vector and scale it to the length
602 // of the fdm velocity vector. This gives us a vector in the
603 // proper coordinate system, but also with the proper time
604 // invariant magnitude.
605 sgdSubVec3( sgdv3_help,
606 last_model_pos, acmodel_loc->get_absolute_view_pos());
607 sgdAddVec3( last_model_pos, sgdv3_null, acmodel_loc->get_absolute_view_pos());
608 SGV3d_help = model_or.rotateBack(
609 surf_or.rotateBack(SGVec3d(sgdv3_help[0],
610 sgdv3_help[1], sgdv3_help[2])));
611 sgSetVec3( model_vel, SGV3d_help[0], SGV3d_help[1], SGV3d_help[2]);
613 float vel = sgLengthVec3(model_vel);
614 if ( fabs(vel) > 0.0001 ) {
615 if ( fabs(fdm_vel / vel) > 0.0001 ) {
616 sgScaleVec3( model_vel, fdm_vel / vel );
620 // check for moving or stationary listener (view position)
621 sgdSubVec3( sgdv3_help,
622 last_listener_pos, (double *)¤t_view->get_view_pos());
623 sgdAddVec3( last_listener_pos,
624 sgdv3_null, (double *)¤t_view->get_view_pos());
626 if ( sgdLengthVec3(sgdv3_help) > 0.00001 ) {
627 sgCopyVec3( listener_vel, model_vel );
629 sgSetVec3( listener_vel, 0.0, 0.0, 0.0 );
632 globals->get_soundmgr()->set_listener_vel( listener_vel );
634 // set positional offset for sources
635 sgdVec3 dsource_pos_offset;
636 sgdSubVec3( dsource_pos_offset,
637 (double*) ¤t_view->get_view_pos(),
638 acmodel_loc->get_absolute_view_pos() );
639 SGVec3d sgv_dsource_pos_offset = model_or.rotateBack(
640 surf_or.rotateBack(SGVec3d(dsource_pos_offset[0],
641 dsource_pos_offset[1], dsource_pos_offset[2])));
643 sgVec3 source_pos_offset;
644 sgSetVec3(source_pos_offset, sgv_dsource_pos_offset[0],
645 sgv_dsource_pos_offset[1], sgv_dsource_pos_offset[2]);
647 globals->get_soundmgr()->set_source_pos_all( source_pos_offset );
650 for (int i = 0; i < 3; i++) {
651 orient[i] = sgv_at[i];
652 orient[i + 3] = sgv_up[i];
654 globals->get_soundmgr()->set_listener_orientation( orient );
657 // all sources are defined to be in the model
658 globals->get_soundmgr()->set_source_vel_all( model_vel );
660 // The listener is always positioned at the origin.
662 sgSetVec3( listener_pos, 0.0, 0.0, 0.0 );
663 globals->get_soundmgr()->set_listener_pos( listener_pos );
666 // END Tile Manager udpates
668 if (!scenery_loaded && globals->get_tile_mgr()->isSceneryLoaded()
669 && cur_fdm_state->get_inited()) {
670 fgSetBool("sim/sceneryloaded",true);
671 fgSetFloat("/sim/sound/volume", init_volume);
672 globals->get_soundmgr()->set_volume(init_volume);
677 SG_LOG( SG_ALL, SG_DEBUG, "" );
680 // Operation for querying OpenGL parameters. This must be done in a
681 // valid OpenGL context, potentially in another thread.
684 struct GeneralInitOperation : public GraphicsContextOperation
686 GeneralInitOperation()
687 : GraphicsContextOperation(std::string("General init"))
690 void run(osg::GraphicsContext* gc)
692 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
693 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
694 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
695 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
698 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
699 general.set_glMaxTexSize( tmp );
700 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
702 glGetIntegerv( GL_DEPTH_BITS, &tmp );
703 general.set_glDepthBits( tmp );
704 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
709 // This is the top level master main function that is registered as
712 // The first few passes take care of initialization things (a couple
713 // per pass) and once everything has been initialized fgMainLoop from
716 static void fgIdleFunction ( void ) {
717 static osg::ref_ptr<GeneralInitOperation> genOp;
718 if ( idle_state == 0 ) {
720 // Pick some window on which to do queries.
721 // XXX Perhaps all this graphics initialization code should be
722 // moved to renderer.cxx?
723 genOp = new GeneralInitOperation;
724 osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
725 WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
726 osg::GraphicsContext* gc = 0;
728 gc = guiCamera->getGraphicsContext();
730 gc->add(genOp.get());
732 wsa->windows[0]->gc->add(genOp.get());
735 } else if ( idle_state == 1 ) {
737 if (!genOp->isFinished())
741 if (!guiFinishInit())
744 fgSplashProgress("reading aircraft list");
747 } else if ( idle_state == 2 ) {
749 // Read the list of available aircraft
751 fgSplashProgress("reading airport & navigation data");
754 } else if ( idle_state == 3 ) {
757 fgSplashProgress("setting up scenery");
760 } else if ( idle_state == 4 ) {
762 // based on the requested presets, calculate the true starting
765 fgInitTowerLocationListener();
767 SGTime *t = fgInitTime();
768 globals->set_time_params( t );
770 // Do some quick general initializations
771 if( !fgInitGeneral()) {
772 SG_LOG( SG_GENERAL, SG_ALERT,
773 "General initialization failed ..." );
777 ////////////////////////////////////////////////////////////////////
778 // Initialize the property-based built-in commands
779 ////////////////////////////////////////////////////////////////////
783 ////////////////////////////////////////////////////////////////////
784 // Initialize the material manager
785 ////////////////////////////////////////////////////////////////////
786 globals->set_matlib( new SGMaterialLib );
787 simgear::SGModelLib::init(globals->get_fg_root());
790 ////////////////////////////////////////////////////////////////////
791 // Initialize the TG scenery subsystem.
792 ////////////////////////////////////////////////////////////////////
793 globals->set_scenery( new FGScenery );
794 globals->get_scenery()->init();
795 globals->get_scenery()->bind();
796 globals->set_tile_mgr( new FGTileMgr );
799 ////////////////////////////////////////////////////////////////////
800 // Initialize the general model subsystem.
801 ////////////////////////////////////////////////////////////////////
802 globals->set_model_mgr(new FGModelMgr);
803 globals->get_model_mgr()->init();
804 globals->get_model_mgr()->bind();
805 fgSplashProgress("loading aircraft");
808 } else if ( idle_state == 5 ) {
810 ////////////////////////////////////////////////////////////////////
811 // Initialize the 3D aircraft model subsystem (has a dependency on
812 // the scenery subsystem.)
813 ////////////////////////////////////////////////////////////////////
814 globals->set_aircraft_model(new FGAircraftModel);
815 globals->get_aircraft_model()->init();
816 globals->get_aircraft_model()->bind();
818 ////////////////////////////////////////////////////////////////////
819 // Initialize the view manager subsystem.
820 ////////////////////////////////////////////////////////////////////
821 FGViewMgr *viewmgr = new FGViewMgr;
822 globals->set_viewmgr( viewmgr );
825 fgSplashProgress("generating sky elements");
828 } else if ( idle_state == 6 ) {
830 // Initialize the sky
831 SGPath ephem_data_path( globals->get_fg_root() );
832 ephem_data_path.append( "Astro" );
833 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
834 ephem->update( globals->get_time_params()->getMjd(),
835 globals->get_time_params()->getLst(),
837 globals->set_ephem( ephem );
839 // TODO: move to environment mgr
841 SGPath texture_path(globals->get_fg_root());
842 texture_path.append("Textures");
843 texture_path.append("Sky");
844 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
845 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
846 thesky->add_cloud_layer(layer);
849 SGPath sky_tex_path( globals->get_fg_root() );
850 sky_tex_path.append( "Textures" );
851 sky_tex_path.append( "Sky" );
852 thesky->texture_path( sky_tex_path.str() );
854 // The sun and moon diameters are scaled down numbers of the
855 // actual diameters. This was needed to fit both the sun and the
856 // moon within the distance to the far clip plane.
857 // Moon diameter: 3,476 kilometers
858 // Sun diameter: 1,390,000 kilometers
859 thesky->build( 80000.0, 80000.0,
861 globals->get_ephem()->getNumPlanets(),
862 globals->get_ephem()->getPlanets(),
863 globals->get_ephem()->getNumStars(),
864 globals->get_ephem()->getStars(),
865 fgGetNode("/environment", true));
867 // Initialize MagVar model
868 SGMagVar *magvar = new SGMagVar();
869 globals->set_mag( magvar );
872 // kludge to initialize mag compass
873 // (should only be done for in-flight
875 // update magvar model
876 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
877 * SGD_DEGREES_TO_RADIANS,
878 fgGetDouble("/position/latitude-deg")
879 * SGD_DEGREES_TO_RADIANS,
880 fgGetDouble("/position/altitude-ft")
882 globals->get_time_params()->getJD() );
883 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
884 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
885 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
888 // airport = new ssgBranch;
889 // airport->setName( "Airport Lighting" );
890 // lighting->addKid( airport );
892 // build our custom render states
893 fgSplashProgress("initializing subsystems");
896 } else if ( idle_state == 7 ) {
898 // Initialize audio support
899 #ifdef ENABLE_AUDIO_SUPPORT
901 // Start the intro music
902 if ( fgGetBool("/sim/startup/intro-music") ) {
903 SGPath mp3file( globals->get_fg_root() );
904 mp3file.append( "Sounds/intro.mp3" );
906 SG_LOG( SG_GENERAL, SG_INFO,
907 "Starting intro music: " << mp3file.str() );
909 #if defined( __CYGWIN__ )
910 string command = "start /m `cygpath -w " + mp3file.str() + "`";
911 #elif defined( WIN32 )
912 string command = "start /m " + mp3file.str();
914 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
917 system ( command.c_str() );
920 // This is the top level init routine which calls all the
921 // other subsystem initialization routines. If you are adding
922 // a subsystem to flightgear, its initialization call should be
923 // located in this routine.
924 if( !fgInitSubsystems()) {
925 SG_LOG( SG_GENERAL, SG_ALERT,
926 "Subsystem initialization failed ..." );
929 fgSplashProgress("setting up time & renderer");
932 } else if ( idle_state == 8 ) {
934 // Initialize the time offset (warp) after fgInitSubsystem
935 // (which initializes the lighting interpolation tables.)
938 // setup OpenGL view parameters
939 globals->get_renderer()->init();
941 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
942 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
943 fgGetInt("/sim/startup/ysize") );
945 fgSplashProgress("loading scenery objects");
949 if ( idle_state == 1000 ) {
950 // We've finished all our initialization steps, from now on we
951 // run the main loop.
952 fgSetBool("sim/sceneryloaded", false);
953 fgRegisterIdleHandler( fgMainLoop );
958 static void upper_case_property(const char *name)
960 SGPropertyNode *p = fgGetNode(name, false);
962 p = fgGetNode(name, true);
963 p->setStringValue("");
965 SGPropertyNode::Type t = p->getType();
966 if (t == SGPropertyNode::NONE || t == SGPropertyNode::UNSPECIFIED)
967 p->setStringValue("");
969 assert(t == SGPropertyNode::STRING);
971 p->addChangeListener(new FGMakeUpperCase);
975 // Main top level initialization
976 bool fgMainInit( int argc, char **argv ) {
978 // set default log levels
979 sglog().setLogLevels( SG_ALL, SG_ALERT );
982 #ifdef FLIGHTGEAR_VERSION
983 version = FLIGHTGEAR_VERSION;
985 version = "unknown version";
987 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
989 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
991 // Allocate global data structures. This needs to happen before
992 // we parse command line options
994 globals = new FGGlobals;
996 // seed the random number generator
999 FGControls *controls = new FGControls;
1000 globals->set_controls( controls );
1002 string_list *col = new string_list;
1003 globals->set_channel_options_list( col );
1005 fgValidatePath("", false); // initialize static variables
1006 upper_case_property("/sim/presets/airport-id");
1007 upper_case_property("/sim/presets/runway");
1008 upper_case_property("/sim/tower/airport-id");
1009 upper_case_property("/autopilot/route-manager/input");
1011 // Scan the config file(s) and command line options to see if
1012 // fg_root was specified (ignore all other options for now)
1013 fgInitFGRoot(argc, argv);
1015 // Check for the correct base package version
1016 static char required_version[] = "1.99.5";
1017 string base_version = fgBasePackageVersion();
1018 if ( !(base_version == required_version) ) {
1019 // tell the operator how to use this application
1021 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
1022 cerr << endl << "Base package check failed ... " \
1023 << "Found version " << base_version << " at: " \
1024 << globals->get_fg_root() << endl;
1025 cerr << "Please upgrade to version: " << required_version << endl;
1027 cerr << "Hit a key to continue..." << endl;
1033 // Load the configuration parameters. (Command line options
1034 // override config file options. Config file options override
1036 if ( !fgInitConfig(argc, argv) ) {
1037 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
1041 // Initialize the Window/Graphics environment.
1042 fgOSInit(&argc, argv);
1043 _bootstrap_OSInit++;
1045 fgRegisterWindowResizeHandler( &FGRenderer::resize );
1046 fgRegisterIdleHandler( &fgIdleFunction );
1047 fgRegisterDrawHandler( &FGRenderer::update );
1049 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
1050 bool get_stencil_buffer = true;
1052 bool get_stencil_buffer = false;
1055 // Initialize plib net interface
1056 netInit( &argc, argv );
1058 // Clouds3D requires an alpha channel
1059 // clouds may require stencil buffer
1060 fgOSOpenWindow(get_stencil_buffer);
1062 // Initialize the splash screen right away
1066 // pass control off to the master event handler
1069 // we never actually get here ... but to avoid compiler warnings,