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_aircraft_model()->update(delta_time_sec);
182 // Update solar system
183 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
184 globals->get_time_params()->getLst(),
185 cur_fdm_state->get_Latitude() );
190 void fgInitTimeDepCalcs( void ) {
195 static const double alt_adjust_ft = 3.758099;
196 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
199 // What should we do when we have nothing else to do? Let's get ready
200 // for the next move and update the display?
201 static void fgMainLoop( void ) {
202 int model_hz = fgGetInt("/sim/model-hz");
204 static SGConstPropertyNode_ptr longitude
205 = fgGetNode("/position/longitude-deg");
206 static SGConstPropertyNode_ptr latitude
207 = fgGetNode("/position/latitude-deg");
208 static SGConstPropertyNode_ptr altitude
209 = fgGetNode("/position/altitude-ft");
210 static SGConstPropertyNode_ptr vn_fps
211 = fgGetNode("/velocities/speed-north-fps");
212 static SGConstPropertyNode_ptr ve_fps
213 = fgGetNode("/velocities/speed-east-fps");
214 static SGConstPropertyNode_ptr vd_fps
215 = fgGetNode("/velocities/speed-down-fps");
216 static SGConstPropertyNode_ptr clock_freeze
217 = fgGetNode("/sim/freeze/clock", true);
218 static SGConstPropertyNode_ptr cur_time_override
219 = fgGetNode("/sim/time/cur-time-override", true);
220 static SGConstPropertyNode_ptr max_simtime_per_frame
221 = fgGetNode("/sim/max-simtime-per-frame", true);
222 static SGPropertyNode_ptr frame_signal
223 = fgGetNode("/sim/signals/frame", true);
225 frame_signal->fireValueChanged();
226 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
228 bool scenery_loaded = fgGetBool("sim/sceneryloaded");
229 bool wait_for_scenery = !(scenery_loaded || fgGetBool("sim/sceneryloaded-override"));
231 // Update the elapsed time.
232 static bool first_time = true;
234 last_time_stamp.stamp();
238 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
239 if ( throttle_hz > 0.0 && !wait_for_scenery ) {
240 // optionally throttle the frame rate (to get consistent frame
241 // rates or reduce cpu usage.
243 double frame_us = 1000000.0 / throttle_hz;
245 #define FG_SLEEP_BASED_TIMING 1
246 #if defined(FG_SLEEP_BASED_TIMING)
247 // sleep based timing loop.
249 // Calling sleep, even usleep() on linux is less accurate than
250 // we like, but it does free up the cpu for other tasks during
251 // the sleep so it is desirable. Because of the way sleep()
252 // is implemented in consumer operating systems like windows
253 // and linux, you almost always sleep a little longer than the
256 // To combat the problem of sleeping too long, we calculate the
257 // desired wait time and shorten it by 2000us (2ms) to avoid
258 // [hopefully] over-sleep'ing. The 2ms value was arrived at
259 // via experimentation. We follow this up at the end with a
260 // simple busy-wait loop to get the final pause timing exactly
263 // Assuming we don't oversleep by more than 2000us, this
264 // should be a reasonable compromise between sleep based
265 // waiting, and busy waiting.
267 // sleep() will always overshoot by a bit so undersleep by
268 // 2000us in the hopes of never oversleeping.
270 if ( frame_us < 0.0 ) {
273 current_time_stamp.stamp();
275 double elapsed_us = current_time_stamp - last_time_stamp;
276 if ( elapsed_us < frame_us ) {
277 double requested_us = frame_us - elapsed_us;
278 ulMilliSecondSleep ( (int)(requested_us / 1000.0) ) ;
282 // busy wait timing loop.
284 // This yields the most accurate timing. If the previous
285 // ulMilliSecondSleep() call is omitted this will peg the cpu
286 // (which is just fine if FG is the only app you care about.)
287 current_time_stamp.stamp();
288 while ( current_time_stamp - last_time_stamp < frame_us ) {
289 current_time_stamp.stamp();
292 // run as fast as the app will go
293 current_time_stamp.stamp();
297 = double(current_time_stamp - last_time_stamp) / 1000000.0;
299 // Limit the time we need to spend in simulation loops
300 // That means, if the /sim/max-simtime-per-frame value is strictly positive
301 // you can limit the maximum amount of time you will do simulations for
302 // one frame to display. The cpu time spent in simulations code is roughly
303 // at least O(real_delta_time_sec). If this is (due to running debug
304 // builds or valgrind or something different blowing up execution times)
305 // larger than the real time you will no longer get any response
306 // from flightgear. This limits that effect. Just set to property from
307 // your .fgfsrc or commandline ...
308 double dtMax = max_simtime_per_frame->getDoubleValue();
309 if (0 < dtMax && dtMax < real_delta_time_sec)
310 real_delta_time_sec = dtMax;
312 // round the real time down to a multiple of 1/model-hz.
313 // this way all systems are updated the _same_ amount of dt.
315 static double rem = 0.0;
316 real_delta_time_sec += rem;
317 double hz = model_hz;
318 double nit = floor(real_delta_time_sec*hz);
319 rem = real_delta_time_sec - nit/hz;
320 real_delta_time_sec = nit/hz;
324 if (clock_freeze->getBoolValue() || wait_for_scenery) {
327 delta_time_sec = real_delta_time_sec;
329 last_time_stamp = current_time_stamp;
330 globals->inc_sim_time_sec( delta_time_sec );
332 // These are useful, especially for Nasal scripts.
333 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
334 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
336 static long remainder = 0;
338 #ifdef FANCY_FRAME_COUNTER
342 static time_t last_time = 0;
343 static int frames = 0;
344 #endif // FANCY_FRAME_COUNTER
346 SGTime *t = globals->get_time_params();
348 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
349 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
351 // Fix elevation. I'm just sticking this here for now, it should
352 // probably move eventually
354 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
355 scenery.get_cur_elev(),
356 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
357 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
359 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
360 scenery.get_cur_elev(),
361 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
362 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
364 // cout << "Warp = " << globals->get_warp() << endl;
367 static bool last_clock_freeze = false;
369 if ( clock_freeze->getBoolValue() ) {
370 // clock freeze requested
371 if ( cur_time_override->getLongValue() == 0 ) {
372 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
373 globals->set_warp( 0 );
376 // no clock freeze requested
377 if ( last_clock_freeze == true ) {
378 // clock just unfroze, let's set warp as the difference
379 // between frozen time and current time so we don't get a
380 // time jump (and corresponding sky object and lighting
382 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
383 fgSetLong( "/sim/time/cur-time-override", 0 );
385 if ( globals->get_warp_delta() != 0 ) {
386 globals->inc_warp( globals->get_warp_delta() );
390 last_clock_freeze = clock_freeze->getBoolValue();
392 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
393 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
394 cur_time_override->getLongValue(),
395 globals->get_warp() );
397 if (globals->get_warp_delta() != 0) {
398 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
402 // update magvar model
403 globals->get_mag()->update( longitude->getDoubleValue()
404 * SGD_DEGREES_TO_RADIANS,
405 latitude->getDoubleValue()
406 * SGD_DEGREES_TO_RADIANS,
407 altitude->getDoubleValue() * SG_FEET_TO_METER,
408 globals->get_time_params()->getJD() );
410 // Get elapsed time (in usec) for this past frame
411 elapsed = fgGetTimeInterval();
412 SG_LOG( SG_ALL, SG_DEBUG,
413 "Elapsed time interval is = " << elapsed
414 << ", previous remainder is = " << remainder );
416 // Calculate frame rate average
417 #ifdef FANCY_FRAME_COUNTER
418 /* old fps calculation */
422 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
423 tmp = general.get_frame(i);
425 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
426 general.set_frame(i+1,tmp);
428 tmp = 1000000.0 / (float)elapsed;
429 general.set_frame(0,tmp);
430 // printf("frame[0] = %.2f\n", general.frames[0]);
432 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
433 // printf("ave = %.2f\n", general.frame_rate);
436 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
437 general.set_frame_rate( frames );
438 fgSetInt("/sim/frame-rate", frames);
439 SG_LOG( SG_ALL, SG_DEBUG,
440 "--> Frame rate is = " << general.get_frame_rate() );
443 last_time = t->get_cur_time();
447 // Update any multiplayer's network queues, the AIMultiplayer
448 // implementation is an AI model and depends on that
449 globals->get_multiplayer_mgr()->Update();
452 if (fgGetBool("/sim/atc/enabled"))
453 globals->get_ATC_mgr()->update(delta_time_sec);
455 // Run the AI subsystem
456 // FIXME: run that also if we have multiplaying enabled since the
457 // multiplayer information is interpreted by an AI model
458 if (fgGetBool("/sim/ai-traffic/enabled"))
459 globals->get_AI_mgr()->update(delta_time_sec);
463 // Calculate model iterations needed for next frame
464 elapsed += remainder;
466 global_multi_loop = (long)(((double)elapsed * 0.000001) * model_hz );
467 remainder = elapsed - ( (global_multi_loop*1000000) / model_hz );
468 SG_LOG( SG_ALL, SG_DEBUG,
469 "Model iterations needed = " << global_multi_loop
470 << ", new remainder = " << remainder );
472 // chop max iterations to something reasonable if the sim was
473 // delayed for an excessive amount of time
474 if ( global_multi_loop > 2.0 * model_hz ) {
475 global_multi_loop = (int)(2.0 * model_hz );
480 if ( global_multi_loop > 0) {
481 // first run the flight model each frame until it is initialized
482 // then continue running each frame only after initial scenery load is complete.
483 fgUpdateTimeDepCalcs();
485 SG_LOG( SG_ALL, SG_DEBUG,
486 "Elapsed time is zero ... we're zinging" );
489 // Run audio scheduler
490 #ifdef ENABLE_AUDIO_SUPPORT
491 if ( globals->get_soundmgr()->is_working() ) {
492 globals->get_soundmgr()->update( delta_time_sec );
496 globals->get_subsystem_mgr()->update(delta_time_sec);
499 // Tile Manager updates - see if we need to load any new scenery tiles.
500 // this code ties together the fdm, viewer and scenery classes...
501 // we may want to move this to its own class at some point
503 double visibility_meters = fgGetDouble("/environment/visibility-m");
504 FGViewer *current_view = globals->get_current_view();
506 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
507 // update tile manager for view...
508 SGLocation *view_location = globals->get_current_view()->getSGLocation();
509 globals->get_tile_mgr()->update( view_location, visibility_meters );
511 double lon = view_location->getLongitude_deg();
512 double lat = view_location->getLatitude_deg();
513 double alt = view_location->getAltitudeASL_ft() * SG_FEET_TO_METER;
515 // check if we can reuse the groundcache for that purpose.
518 bool valid = cur_fdm_state->is_valid_m(&ref_time, pt.sg(), &r);
519 SGVec3d viewpos(globals->get_current_view()->get_view_pos());
520 if (valid && distSqr(viewpos, pt) < r*r) {
521 // Reuse the cache ...
523 = cur_fdm_state->get_groundlevel_m(lat*SGD_DEGREES_TO_RADIANS,
524 lon*SGD_DEGREES_TO_RADIANS,
526 view_location->set_cur_elev_m( lev );
528 // Do full intersection test.
530 if (globals->get_scenery()->get_elevation_m(lat, lon, alt+2, lev, 0))
531 view_location->set_cur_elev_m( lev );
533 view_location->set_cur_elev_m( -9999.0 );
537 // run Nasal's settimer() loops right before the view manager
538 globals->get_event_mgr()->update(delta_time_sec);
540 // pick up model coordidnates that Nasal code may have set relative to the
542 globals->get_model_mgr()->update(delta_time_sec);
544 // update the view angle as late as possible, but before sound calculations
545 globals->get_viewmgr()->update(delta_time_sec);
547 // Do any I/O channel work that might need to be done (must come after viewmgr)
548 globals->get_io()->update(real_delta_time_sec);
550 #ifdef ENABLE_AUDIO_SUPPORT
551 // Right now we make a simplifying assumption that the primary
552 // aircraft is the source of all sounds and that all sounds are
553 // positioned in the aircraft base
555 static sgdVec3 last_listener_pos = {0, 0, 0};
556 static sgdVec3 last_model_pos = {0, 0, 0};
558 // get the orientation
559 const SGQuatd view_or = current_view->getViewOrientation();
560 SGQuatd surf_or = SGQuatd::fromLonLatDeg(
561 current_view->getLongitude_deg(), current_view->getLatitude_deg());
562 SGQuatd model_or = SGQuatd::fromYawPitchRollDeg(
563 globals->get_aircraft_model()->get3DModel()->getHeadingDeg(),
564 globals->get_aircraft_model()->get3DModel()->getPitchDeg(),
565 globals->get_aircraft_model()->get3DModel()->getRollDeg());
567 // get the up and at vector in the aircraft base
568 // (ok, the up vector is a down vector, but the coordinates
569 // are finally calculated in a left hand system and openal
570 // lives in a right hand system. Therefore we need to pass
571 // the down vector to get correct stereo sound.)
572 SGVec3d sgv_up = model_or.rotateBack(
573 surf_or.rotateBack(view_or.rotate(SGVec3d(0, 1, 0))));
575 sgSetVec3(up, sgv_up[0], sgv_up[1], sgv_up[2]);
576 SGVec3d sgv_at = model_or.rotateBack(
577 surf_or.rotateBack(view_or.rotate(SGVec3d(0, 0, 1))));
579 sgSetVec3(at, sgv_at[0], sgv_at[1], sgv_at[2]);
581 // get the location data for the primary FDM (now hardcoded to ac model)...
582 SGLocation *acmodel_loc = NULL;
583 acmodel_loc = (SGLocation *)globals->
584 get_aircraft_model()->get3DModel()->getSGLocation();
586 // Calculate speed of listener and model. This code assumes the
587 // listener is either tracking the model at the same speed or
590 sgVec3 listener_vel, model_vel;
593 sgdVec3 sgdv3_null = {0, 0, 0};
595 // the aircraft velocity as reported by the fdm (this will not
596 // vary or be affected by frame rates or timing jitter.)
598 sgSetVec3( fdm_vel_vec,
599 vn_fps->getDoubleValue() * SG_FEET_TO_METER,
600 ve_fps->getDoubleValue() * SG_FEET_TO_METER,
601 vd_fps->getDoubleValue() * SG_FEET_TO_METER );
602 double fdm_vel = sgLengthVec3(fdm_vel_vec);
604 // compute the aircraft velocity vector and scale it to the length
605 // of the fdm velocity vector. This gives us a vector in the
606 // proper coordinate system, but also with the proper time
607 // invariant magnitude.
608 sgdSubVec3( sgdv3_help,
609 last_model_pos, acmodel_loc->get_absolute_view_pos());
610 sgdAddVec3( last_model_pos, sgdv3_null, acmodel_loc->get_absolute_view_pos());
611 SGV3d_help = model_or.rotateBack(
612 surf_or.rotateBack(SGVec3d(sgdv3_help[0],
613 sgdv3_help[1], sgdv3_help[2])));
614 sgSetVec3( model_vel, SGV3d_help[0], SGV3d_help[1], SGV3d_help[2]);
616 float vel = sgLengthVec3(model_vel);
617 if ( fabs(vel) > 0.0001 ) {
618 if ( fabs(fdm_vel / vel) > 0.0001 ) {
619 sgScaleVec3( model_vel, fdm_vel / vel );
623 // check for moving or stationary listener (view position)
624 sgdSubVec3( sgdv3_help,
625 last_listener_pos, (double *)¤t_view->get_view_pos());
626 sgdAddVec3( last_listener_pos,
627 sgdv3_null, (double *)¤t_view->get_view_pos());
629 if ( sgdLengthVec3(sgdv3_help) > 0.2 ) {
630 sgCopyVec3( listener_vel, model_vel );
632 sgSetVec3( listener_vel, 0.0, 0.0, 0.0 );
635 globals->get_soundmgr()->set_listener_vel( listener_vel );
637 // set positional offset for sources
638 sgdVec3 dsource_pos_offset;
639 sgdSubVec3( dsource_pos_offset,
640 (double*) ¤t_view->get_view_pos(),
641 acmodel_loc->get_absolute_view_pos() );
642 SGVec3d sgv_dsource_pos_offset = model_or.rotateBack(
643 surf_or.rotateBack(SGVec3d(dsource_pos_offset[0],
644 dsource_pos_offset[1], dsource_pos_offset[2])));
646 sgVec3 source_pos_offset;
647 sgSetVec3(source_pos_offset, sgv_dsource_pos_offset[0],
648 sgv_dsource_pos_offset[1], sgv_dsource_pos_offset[2]);
650 globals->get_soundmgr()->set_source_pos_all( source_pos_offset );
653 for (int i = 0; i < 3; i++) {
654 orient[i] = sgv_at[i];
655 orient[i + 3] = sgv_up[i];
657 globals->get_soundmgr()->set_listener_orientation( orient );
660 // all sources are defined to be in the model
661 globals->get_soundmgr()->set_source_vel_all( model_vel );
663 // The listener is always positioned at the origin.
665 sgSetVec3( listener_pos, 0.0, 0.0, 0.0 );
666 globals->get_soundmgr()->set_listener_pos( listener_pos );
669 // END Tile Manager udpates
671 if (!scenery_loaded && globals->get_tile_mgr()->isSceneryLoaded()
672 && cur_fdm_state->get_inited()) {
673 fgSetBool("sim/sceneryloaded",true);
674 fgSetFloat("/sim/sound/volume", init_volume);
675 globals->get_soundmgr()->set_volume(init_volume);
680 SG_LOG( SG_ALL, SG_DEBUG, "" );
683 // Operation for querying OpenGL parameters. This must be done in a
684 // valid OpenGL context, potentially in another thread.
687 struct GeneralInitOperation : public GraphicsContextOperation
689 GeneralInitOperation()
690 : GraphicsContextOperation(std::string("General init"))
693 void run(osg::GraphicsContext* gc)
695 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
696 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
697 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
698 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
701 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
702 general.set_glMaxTexSize( tmp );
703 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
705 glGetIntegerv( GL_DEPTH_BITS, &tmp );
706 general.set_glDepthBits( tmp );
707 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
712 // This is the top level master main function that is registered as
715 // The first few passes take care of initialization things (a couple
716 // per pass) and once everything has been initialized fgMainLoop from
719 static void fgIdleFunction ( void ) {
720 static osg::ref_ptr<GeneralInitOperation> genOp;
721 if ( idle_state == 0 ) {
723 // Pick some window on which to do queries.
724 // XXX Perhaps all this graphics initialization code should be
725 // moved to renderer.cxx?
726 genOp = new GeneralInitOperation;
727 osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
728 WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
729 osg::GraphicsContext* gc = 0;
731 gc = guiCamera->getGraphicsContext();
733 gc->add(genOp.get());
735 wsa->windows[0]->gc->add(genOp.get());
738 } else if ( idle_state == 1 ) {
740 if (!genOp->isFinished())
744 if (!guiFinishInit())
747 fgSplashProgress("reading aircraft list");
750 } else if ( idle_state == 2 ) {
752 // Read the list of available aircraft
754 fgSplashProgress("reading airport & navigation data");
757 } else if ( idle_state == 3 ) {
760 fgSplashProgress("setting up scenery");
763 } else if ( idle_state == 4 ) {
765 // based on the requested presets, calculate the true starting
768 fgInitTowerLocationListener();
770 SGTime *t = fgInitTime();
771 globals->set_time_params( t );
773 // Do some quick general initializations
774 if( !fgInitGeneral()) {
775 SG_LOG( SG_GENERAL, SG_ALERT,
776 "General initialization failed ..." );
780 ////////////////////////////////////////////////////////////////////
781 // Initialize the property-based built-in commands
782 ////////////////////////////////////////////////////////////////////
786 ////////////////////////////////////////////////////////////////////
787 // Initialize the material manager
788 ////////////////////////////////////////////////////////////////////
789 globals->set_matlib( new SGMaterialLib );
790 simgear::SGModelLib::init(globals->get_fg_root());
793 ////////////////////////////////////////////////////////////////////
794 // Initialize the TG scenery subsystem.
795 ////////////////////////////////////////////////////////////////////
796 globals->set_scenery( new FGScenery );
797 globals->get_scenery()->init();
798 globals->get_scenery()->bind();
799 globals->set_tile_mgr( new FGTileMgr );
802 ////////////////////////////////////////////////////////////////////
803 // Initialize the general model subsystem.
804 ////////////////////////////////////////////////////////////////////
805 globals->set_model_mgr(new FGModelMgr);
806 globals->get_model_mgr()->init();
807 globals->get_model_mgr()->bind();
808 fgSplashProgress("loading aircraft");
811 } else if ( idle_state == 5 ) {
813 ////////////////////////////////////////////////////////////////////
814 // Initialize the 3D aircraft model subsystem (has a dependency on
815 // the scenery subsystem.)
816 ////////////////////////////////////////////////////////////////////
817 globals->set_aircraft_model(new FGAircraftModel);
818 globals->get_aircraft_model()->init();
819 globals->get_aircraft_model()->bind();
821 ////////////////////////////////////////////////////////////////////
822 // Initialize the view manager subsystem.
823 ////////////////////////////////////////////////////////////////////
824 FGViewMgr *viewmgr = new FGViewMgr;
825 globals->set_viewmgr( viewmgr );
828 fgSplashProgress("generating sky elements");
831 } else if ( idle_state == 6 ) {
833 // Initialize the sky
834 SGPath ephem_data_path( globals->get_fg_root() );
835 ephem_data_path.append( "Astro" );
836 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
837 ephem->update( globals->get_time_params()->getMjd(),
838 globals->get_time_params()->getLst(),
840 globals->set_ephem( ephem );
842 // TODO: move to environment mgr
844 SGPath texture_path(globals->get_fg_root());
845 texture_path.append("Textures");
846 texture_path.append("Sky");
847 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
848 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
849 thesky->add_cloud_layer(layer);
852 SGPath sky_tex_path( globals->get_fg_root() );
853 sky_tex_path.append( "Textures" );
854 sky_tex_path.append( "Sky" );
855 thesky->texture_path( sky_tex_path.str() );
857 // The sun and moon diameters are scaled down numbers of the
858 // actual diameters. This was needed to fit both the sun and the
859 // moon within the distance to the far clip plane.
860 // Moon diameter: 3,476 kilometers
861 // Sun diameter: 1,390,000 kilometers
862 thesky->build( 80000.0, 80000.0,
864 globals->get_ephem()->getNumPlanets(),
865 globals->get_ephem()->getPlanets(),
866 globals->get_ephem()->getNumStars(),
867 globals->get_ephem()->getStars(),
868 fgGetNode("/environment", true));
870 // Initialize MagVar model
871 SGMagVar *magvar = new SGMagVar();
872 globals->set_mag( magvar );
875 // kludge to initialize mag compass
876 // (should only be done for in-flight
878 // update magvar model
879 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
880 * SGD_DEGREES_TO_RADIANS,
881 fgGetDouble("/position/latitude-deg")
882 * SGD_DEGREES_TO_RADIANS,
883 fgGetDouble("/position/altitude-ft")
885 globals->get_time_params()->getJD() );
886 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
887 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
888 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
891 // airport = new ssgBranch;
892 // airport->setName( "Airport Lighting" );
893 // lighting->addKid( airport );
895 // build our custom render states
896 fgSplashProgress("initializing subsystems");
899 } else if ( idle_state == 7 ) {
901 // Initialize audio support
902 #ifdef ENABLE_AUDIO_SUPPORT
904 // Start the intro music
905 if ( fgGetBool("/sim/startup/intro-music") ) {
906 SGPath mp3file( globals->get_fg_root() );
907 mp3file.append( "Sounds/intro.mp3" );
909 SG_LOG( SG_GENERAL, SG_INFO,
910 "Starting intro music: " << mp3file.str() );
912 #if defined( __CYGWIN__ )
913 string command = "start /m `cygpath -w " + mp3file.str() + "`";
914 #elif defined( WIN32 )
915 string command = "start /m " + mp3file.str();
917 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
920 system ( command.c_str() );
923 // This is the top level init routine which calls all the
924 // other subsystem initialization routines. If you are adding
925 // a subsystem to flightgear, its initialization call should be
926 // located in this routine.
927 if( !fgInitSubsystems()) {
928 SG_LOG( SG_GENERAL, SG_ALERT,
929 "Subsystem initialization failed ..." );
932 fgSplashProgress("setting up time & renderer");
935 } else if ( idle_state == 8 ) {
937 // Initialize the time offset (warp) after fgInitSubsystem
938 // (which initializes the lighting interpolation tables.)
941 // setup OpenGL view parameters
942 globals->get_renderer()->init();
944 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
945 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
946 fgGetInt("/sim/startup/ysize") );
948 fgSplashProgress("loading scenery objects");
952 if ( idle_state == 1000 ) {
953 // We've finished all our initialization steps, from now on we
954 // run the main loop.
955 fgSetBool("sim/sceneryloaded", false);
956 fgRegisterIdleHandler( fgMainLoop );
961 static void upper_case_property(const char *name)
963 SGPropertyNode *p = fgGetNode(name, false);
965 p = fgGetNode(name, true);
966 p->setStringValue("");
968 SGPropertyNode::Type t = p->getType();
969 if (t == SGPropertyNode::NONE || t == SGPropertyNode::UNSPECIFIED)
970 p->setStringValue("");
972 assert(t == SGPropertyNode::STRING);
974 p->addChangeListener(new FGMakeUpperCase);
978 // Main top level initialization
979 bool fgMainInit( int argc, char **argv ) {
981 // set default log levels
982 sglog().setLogLevels( SG_ALL, SG_ALERT );
985 #ifdef FLIGHTGEAR_VERSION
986 version = FLIGHTGEAR_VERSION;
988 version = "unknown version";
990 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
992 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
994 // Allocate global data structures. This needs to happen before
995 // we parse command line options
997 globals = new FGGlobals;
999 // seed the random number generator
1002 FGControls *controls = new FGControls;
1003 globals->set_controls( controls );
1005 string_list *col = new string_list;
1006 globals->set_channel_options_list( col );
1008 fgValidatePath("", false); // initialize static variables
1009 upper_case_property("/sim/presets/airport-id");
1010 upper_case_property("/sim/presets/runway");
1011 upper_case_property("/sim/tower/airport-id");
1012 upper_case_property("/autopilot/route-manager/input");
1014 // Scan the config file(s) and command line options to see if
1015 // fg_root was specified (ignore all other options for now)
1016 fgInitFGRoot(argc, argv);
1018 // Check for the correct base package version
1019 static char required_version[] = "1.9.0";
1020 string base_version = fgBasePackageVersion();
1021 if ( !(base_version == required_version) ) {
1022 // tell the operator how to use this application
1024 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
1025 cerr << endl << "Base package check failed ... " \
1026 << "Found version " << base_version << " at: " \
1027 << globals->get_fg_root() << endl;
1028 cerr << "Please upgrade to version: " << required_version << endl;
1030 cerr << "Hit a key to continue..." << endl;
1036 // Load the configuration parameters. (Command line options
1037 // override config file options. Config file options override
1039 if ( !fgInitConfig(argc, argv) ) {
1040 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
1044 // Initialize the Window/Graphics environment.
1045 fgOSInit(&argc, argv);
1046 _bootstrap_OSInit++;
1048 fgRegisterWindowResizeHandler( &FGRenderer::resize );
1049 fgRegisterIdleHandler( &fgIdleFunction );
1050 fgRegisterDrawHandler( &FGRenderer::update );
1052 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
1053 bool get_stencil_buffer = true;
1055 bool get_stencil_buffer = false;
1058 // Initialize plib net interface
1059 netInit( &argc, argv );
1061 // Clouds3D requires an alpha channel
1062 // clouds may require stencil buffer
1063 fgOSOpenWindow(get_stencil_buffer);
1065 // Initialize the splash screen right away
1069 // pass control off to the master event handler
1072 // we never actually get here ... but to avoid compiler warnings,