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>
35 #include <plib/netSocket.h>
38 #include <osg/GraphicsContext>
39 #include <osgDB/Registry>
42 #include <simgear/ephemeris/ephemeris.hxx>
43 #include <simgear/scene/model/modellib.hxx>
44 #include <simgear/scene/material/matlib.hxx>
45 #include <simgear/scene/model/animation.hxx>
46 #include <simgear/scene/sky/sky.hxx>
47 #include <simgear/structure/event_mgr.hxx>
48 #include <simgear/props/props.hxx>
49 #include <simgear/timing/sg_time.hxx>
50 #include <simgear/math/sg_random.h>
52 #include <Time/light.hxx>
53 #include <Include/general.hxx>
54 #include <Aircraft/replay.hxx>
55 #include <Cockpit/cockpit.hxx>
56 #include <Cockpit/hud.hxx>
57 #include <Model/panelnode.hxx>
58 #include <Model/modelmgr.hxx>
59 #include <Model/acmodel.hxx>
60 #include <Scenery/scenery.hxx>
61 #include <Scenery/tilemgr.hxx>
62 #include <Sound/beacon.hxx>
63 #include <Sound/morse.hxx>
64 #include <FDM/flight.hxx>
65 #include <ATCDCL/ATCmgr.hxx>
66 #include <ATCDCL/AIMgr.hxx>
67 #include <Time/tmp.hxx>
68 #include <Time/fg_timer.hxx>
69 #include <Environment/environment_mgr.hxx>
70 #include <GUI/new_gui.hxx>
71 #include <MultiPlayer/multiplaymgr.hxx>
73 #include "CameraGroup.hxx"
74 #include "fg_commands.hxx"
76 #include "renderer.hxx"
80 #include "fg_init.hxx"
81 #include "WindowSystemAdapter.hxx"
84 static double real_delta_time_sec = 0.0;
85 double delta_time_sec = 0.0;
86 extern float init_volume;
88 using namespace flightgear;
90 // This is a record containing a bit of global housekeeping information
93 // Specify our current idle function state. This is used to run all
94 // our initializations out of the idle callback so that we can get a
95 // splash screen up and running right away.
97 long global_multi_loop;
99 SGTimeStamp last_time_stamp;
100 SGTimeStamp current_time_stamp;
102 // The atexit() function handler should know when the graphical subsystem
104 extern int _bootstrap_OSInit;
108 // Update internal time dependent calculations (i.e. flight model)
109 // FIXME: this distinction is obsolete; all subsystems now get delta
111 void fgUpdateTimeDepCalcs() {
112 static bool inited = false;
114 static const SGPropertyNode *replay_state
115 = fgGetNode( "/sim/freeze/replay-state", true );
116 static SGPropertyNode *replay_time
117 = fgGetNode( "/sim/replay/time", true );
118 // static const SGPropertyNode *replay_end_time
119 // = fgGetNode( "/sim/replay/end-time", true );
121 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
123 // Initialize the FDM here if it hasn't been and if we have a
124 // scenery elevation hit.
126 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
127 // << " cur_elev = " << scenery.get_cur_elev() << endl;
129 if (!cur_fdm_state->get_inited()) {
130 // Check for scenery around the aircraft.
131 double lon = fgGetDouble("/sim/presets/longitude-deg");
132 double lat = fgGetDouble("/sim/presets/latitude-deg");
133 // We require just to have 50 meter scenery availabe around
135 double range = 1000.0;
136 if (globals->get_scenery()->scenery_available(lat, lon, range)) {
137 //SG_LOG(SG_FLIGHT, SG_INFO, "Finally initializing fdm");
138 cur_fdm_state->init();
139 if ( cur_fdm_state->get_bound() ) {
140 cur_fdm_state->unbind();
142 cur_fdm_state->bind();
146 // conceptually, the following block could be done for each fdm
148 if ( cur_fdm_state->get_inited() ) {
149 // we have been inited, and we are good to go ...
151 if ( replay_state->getIntValue() == 0 ) {
152 // replay off, run fdm
153 cur_fdm_state->update( delta_time_sec );
155 FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
156 r->replay( replay_time->getDoubleValue() );
157 if ( replay_state->getIntValue() == 1 ) {
159 replay_time->setDoubleValue( replay_time->getDoubleValue()
161 * fgGetInt("/sim/speed-up") ) );
162 } else if ( replay_state->getIntValue() == 2 ) {
163 // paused playback (don't advance replay time)
169 fgSetBool("/sim/signals/fdm-initialized", true);
173 // do nothing, fdm isn't inited yet
176 globals->get_model_mgr()->update(delta_time_sec);
177 globals->get_aircraft_model()->update(delta_time_sec);
179 // Update solar system
180 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
181 globals->get_time_params()->getLst(),
182 cur_fdm_state->get_Latitude() );
187 void fgInitTimeDepCalcs( void ) {
192 static const double alt_adjust_ft = 3.758099;
193 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
196 // What should we do when we have nothing else to do? Let's get ready
197 // for the next move and update the display?
198 static void fgMainLoop( void ) {
199 int model_hz = fgGetInt("/sim/model-hz");
201 static SGConstPropertyNode_ptr longitude
202 = fgGetNode("/position/longitude-deg");
203 static SGConstPropertyNode_ptr latitude
204 = fgGetNode("/position/latitude-deg");
205 static SGConstPropertyNode_ptr altitude
206 = fgGetNode("/position/altitude-ft");
207 static SGConstPropertyNode_ptr clock_freeze
208 = fgGetNode("/sim/freeze/clock", true);
209 static SGConstPropertyNode_ptr cur_time_override
210 = fgGetNode("/sim/time/cur-time-override", true);
211 static SGConstPropertyNode_ptr max_simtime_per_frame
212 = fgGetNode("/sim/max-simtime-per-frame", true);
213 static SGPropertyNode_ptr frame_signal
214 = fgGetNode("/sim/signals/frame", true);
216 frame_signal->fireValueChanged();
217 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
219 bool scenery_loaded = fgGetBool("sim/sceneryloaded");
220 bool wait_for_scenery = !(scenery_loaded || fgGetBool("sim/sceneryloaded-override"));
222 // Update the elapsed time.
223 static bool first_time = true;
225 last_time_stamp.stamp();
229 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
230 if ( throttle_hz > 0.0 && !wait_for_scenery ) {
231 // optionally throttle the frame rate (to get consistent frame
232 // rates or reduce cpu usage.
234 double frame_us = 1000000.0 / throttle_hz;
236 #define FG_SLEEP_BASED_TIMING 1
237 #if defined(FG_SLEEP_BASED_TIMING)
238 // sleep based timing loop.
240 // Calling sleep, even usleep() on linux is less accurate than
241 // we like, but it does free up the cpu for other tasks during
242 // the sleep so it is desirable. Because of the way sleep()
243 // is implemented in consumer operating systems like windows
244 // and linux, you almost always sleep a little longer than the
247 // To combat the problem of sleeping too long, we calculate the
248 // desired wait time and shorten it by 2000us (2ms) to avoid
249 // [hopefully] over-sleep'ing. The 2ms value was arrived at
250 // via experimentation. We follow this up at the end with a
251 // simple busy-wait loop to get the final pause timing exactly
254 // Assuming we don't oversleep by more than 2000us, this
255 // should be a reasonable compromise between sleep based
256 // waiting, and busy waiting.
258 // sleep() will always overshoot by a bit so undersleep by
259 // 2000us in the hopes of never oversleeping.
261 if ( frame_us < 0.0 ) {
264 current_time_stamp.stamp();
266 double elapsed_us = current_time_stamp - last_time_stamp;
267 if ( elapsed_us < frame_us ) {
268 double requested_us = frame_us - elapsed_us;
269 ulMilliSecondSleep ( (int)(requested_us / 1000.0) ) ;
273 // busy wait timing loop.
275 // This yields the most accurate timing. If the previous
276 // ulMilliSecondSleep() call is omitted this will peg the cpu
277 // (which is just fine if FG is the only app you care about.)
278 current_time_stamp.stamp();
279 while ( current_time_stamp - last_time_stamp < frame_us ) {
280 current_time_stamp.stamp();
283 // run as fast as the app will go
284 current_time_stamp.stamp();
288 = double(current_time_stamp - last_time_stamp) / 1000000.0;
290 // Limit the time we need to spend in simulation loops
291 // That means, if the /sim/max-simtime-per-frame value is strictly positive
292 // you can limit the maximum amount of time you will do simulations for
293 // one frame to display. The cpu time spent in simulations code is roughly
294 // at least O(real_delta_time_sec). If this is (due to running debug
295 // builds or valgrind or something different blowing up execution times)
296 // larger than the real time you will no longer get any response
297 // from flightgear. This limits that effect. Just set to property from
298 // your .fgfsrc or commandline ...
299 double dtMax = max_simtime_per_frame->getDoubleValue();
300 if (0 < dtMax && dtMax < real_delta_time_sec)
301 real_delta_time_sec = dtMax;
303 // round the real time down to a multiple of 1/model-hz.
304 // this way all systems are updated the _same_ amount of dt.
306 static double rem = 0.0;
307 real_delta_time_sec += rem;
308 double hz = model_hz;
309 double nit = floor(real_delta_time_sec*hz);
310 rem = real_delta_time_sec - nit/hz;
311 real_delta_time_sec = nit/hz;
315 if (clock_freeze->getBoolValue() || wait_for_scenery) {
318 delta_time_sec = real_delta_time_sec;
320 last_time_stamp = current_time_stamp;
321 globals->inc_sim_time_sec( delta_time_sec );
323 // These are useful, especially for Nasal scripts.
324 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
325 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
327 static long remainder = 0;
329 #ifdef FANCY_FRAME_COUNTER
333 static time_t last_time = 0;
334 static int frames = 0;
335 #endif // FANCY_FRAME_COUNTER
337 SGTime *t = globals->get_time_params();
339 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
340 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
342 // Fix elevation. I'm just sticking this here for now, it should
343 // probably move eventually
345 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
346 scenery.get_cur_elev(),
347 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
348 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
350 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
351 scenery.get_cur_elev(),
352 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
353 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
355 // cout << "Warp = " << globals->get_warp() << endl;
358 static bool last_clock_freeze = false;
360 if ( clock_freeze->getBoolValue() ) {
361 // clock freeze requested
362 if ( cur_time_override->getLongValue() == 0 ) {
363 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
364 globals->set_warp( 0 );
367 // no clock freeze requested
368 if ( last_clock_freeze == true ) {
369 // clock just unfroze, let's set warp as the difference
370 // between frozen time and current time so we don't get a
371 // time jump (and corresponding sky object and lighting
373 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
374 fgSetLong( "/sim/time/cur-time-override", 0 );
376 if ( globals->get_warp_delta() != 0 ) {
377 globals->inc_warp( globals->get_warp_delta() );
381 last_clock_freeze = clock_freeze->getBoolValue();
383 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
384 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
385 cur_time_override->getLongValue(),
386 globals->get_warp() );
388 if (globals->get_warp_delta() != 0) {
389 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
393 // update magvar model
394 globals->get_mag()->update( longitude->getDoubleValue()
395 * SGD_DEGREES_TO_RADIANS,
396 latitude->getDoubleValue()
397 * SGD_DEGREES_TO_RADIANS,
398 altitude->getDoubleValue() * SG_FEET_TO_METER,
399 globals->get_time_params()->getJD() );
401 // Get elapsed time (in usec) for this past frame
402 elapsed = fgGetTimeInterval();
403 SG_LOG( SG_ALL, SG_DEBUG,
404 "Elapsed time interval is = " << elapsed
405 << ", previous remainder is = " << remainder );
407 // Calculate frame rate average
408 #ifdef FANCY_FRAME_COUNTER
409 /* old fps calculation */
413 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
414 tmp = general.get_frame(i);
416 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
417 general.set_frame(i+1,tmp);
419 tmp = 1000000.0 / (float)elapsed;
420 general.set_frame(0,tmp);
421 // printf("frame[0] = %.2f\n", general.frames[0]);
423 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
424 // printf("ave = %.2f\n", general.frame_rate);
427 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
428 general.set_frame_rate( frames );
429 fgSetInt("/sim/frame-rate", frames);
430 SG_LOG( SG_ALL, SG_DEBUG,
431 "--> Frame rate is = " << general.get_frame_rate() );
434 last_time = t->get_cur_time();
438 // Update any multiplayer's network queues, the AIMultiplayer
439 // implementation is an AI model and depends on that
440 globals->get_multiplayer_mgr()->Update();
443 if (fgGetBool("/sim/atc/enabled"))
444 globals->get_ATC_mgr()->update(delta_time_sec);
446 // Run the AI subsystem
447 // FIXME: run that also if we have multiplaying enabled since the
448 // multiplayer information is interpreted by an AI model
449 if (fgGetBool("/sim/ai-traffic/enabled"))
450 globals->get_AI_mgr()->update(delta_time_sec);
454 // Calculate model iterations needed for next frame
455 elapsed += remainder;
457 global_multi_loop = (long)(((double)elapsed * 0.000001) * model_hz );
458 remainder = elapsed - ( (global_multi_loop*1000000) / model_hz );
459 SG_LOG( SG_ALL, SG_DEBUG,
460 "Model iterations needed = " << global_multi_loop
461 << ", new remainder = " << remainder );
463 // chop max iterations to something reasonable if the sim was
464 // delayed for an excessive amount of time
465 if ( global_multi_loop > 2.0 * model_hz ) {
466 global_multi_loop = (int)(2.0 * model_hz );
471 if ( global_multi_loop > 0) {
472 // first run the flight model each frame until it is initialized
473 // then continue running each frame only after initial scenery load is complete.
474 fgUpdateTimeDepCalcs();
476 SG_LOG( SG_ALL, SG_DEBUG,
477 "Elapsed time is zero ... we're zinging" );
480 // Run audio scheduler
481 #ifdef ENABLE_AUDIO_SUPPORT
482 if ( globals->get_soundmgr()->is_working() ) {
483 globals->get_soundmgr()->update( delta_time_sec );
487 globals->get_subsystem_mgr()->update(delta_time_sec);
490 // Tile Manager updates - see if we need to load any new scenery tiles.
491 // this code ties together the fdm, viewer and scenery classes...
492 // we may want to move this to its own class at some point
494 double visibility_meters = fgGetDouble("/environment/visibility-m");
495 FGViewer *current_view = globals->get_current_view();
497 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
498 // update tile manager for view...
499 SGLocation *view_location = globals->get_current_view()->getSGLocation();
500 globals->get_tile_mgr()->update( view_location, visibility_meters );
502 double lon = view_location->getLongitude_deg();
503 double lat = view_location->getLatitude_deg();
504 double alt = view_location->getAltitudeASL_ft() * SG_FEET_TO_METER;
506 // check if we can reuse the groundcache for that purpose.
509 bool valid = cur_fdm_state->is_valid_m(&ref_time, pt.sg(), &r);
510 SGVec3d viewpos(globals->get_current_view()->get_view_pos());
511 if (valid && distSqr(viewpos, pt) < r*r) {
512 // Reuse the cache ...
514 = cur_fdm_state->get_groundlevel_m(lat*SGD_DEGREES_TO_RADIANS,
515 lon*SGD_DEGREES_TO_RADIANS,
517 view_location->set_cur_elev_m( lev );
519 // Do full intersection test.
521 if (globals->get_scenery()->get_elevation_m(lat, lon, alt+2, lev, 0))
522 view_location->set_cur_elev_m( lev );
524 view_location->set_cur_elev_m( -9999.0 );
528 // run Nasal's settimer() loops right before the view manager
529 globals->get_event_mgr()->update(delta_time_sec);
531 // update the view angle as late as possible, but before sound calculations
532 globals->get_viewmgr()->update(delta_time_sec);
534 // Do any I/O channel work that might need to be done (must come after viewmgr)
535 globals->get_io()->update(real_delta_time_sec);
537 #ifdef ENABLE_AUDIO_SUPPORT
538 // Right now we make a simplifying assumption that the primary
539 // aircraft is the source of all sounds and that all sounds are
540 // positioned in the aircraft base
542 static sgdVec3 last_visitor_pos = {0, 0, 0};
543 static sgdVec3 last_model_pos = {0, 0, 0};
545 // get the orientation
546 const SGQuatd view_or = current_view->getViewOrientation();
547 SGQuatd surf_or = SGQuatd::fromLonLatDeg(
548 current_view->getLongitude_deg(), current_view->getLatitude_deg());
549 SGQuatd model_or = SGQuatd::fromYawPitchRollDeg(
550 globals->get_aircraft_model()->get3DModel()->getHeadingDeg(),
551 globals->get_aircraft_model()->get3DModel()->getPitchDeg(),
552 globals->get_aircraft_model()->get3DModel()->getRollDeg());
554 // get the up and at vector in the aircraft base
555 // (ok, the up vector is a down vector, but the coordinates
556 // are finally calculated in a left hand system and openal
557 // lives in a right hand system. Therefore we need to pass
558 // the down vector to get correct stereo sound.)
559 SGVec3d sgv_up = model_or.rotateBack(
560 surf_or.rotateBack(view_or.rotate(SGVec3d(0, 1, 0))));
562 sgSetVec3(up, sgv_up[0], sgv_up[1], sgv_up[2]);
563 SGVec3d sgv_at = model_or.rotateBack(
564 surf_or.rotateBack(view_or.rotate(SGVec3d(0, 0, 1))));
566 sgSetVec3(at, sgv_at[0], sgv_at[1], sgv_at[2]);
568 // get the location data for the primary FDM (now hardcoded to ac model)...
569 SGLocation *acmodel_loc = NULL;
570 acmodel_loc = (SGLocation *)globals->
571 get_aircraft_model()->get3DModel()->getSGLocation();
573 // calculate speed of visitor and model
574 sgVec3 listener_vel, model_vel;
577 sgdVec3 sgdv3_null = {0, 0, 0};
579 sgdSubVec3( sgdv3_help,
580 last_visitor_pos, (double *)¤t_view->get_view_pos());
581 sgdAddVec3( last_visitor_pos, sgdv3_null, (double *)¤t_view->get_view_pos());
582 SGV3d_help = model_or.rotateBack(
583 surf_or.rotateBack(SGVec3d(sgdv3_help[0],
584 sgdv3_help[1], sgdv3_help[2])));
585 sgSetVec3( listener_vel, SGV3d_help[0], SGV3d_help[1], SGV3d_help[2]);
587 sgdSubVec3( sgdv3_help,
588 last_model_pos, acmodel_loc->get_absolute_view_pos());
589 sgdAddVec3( last_model_pos, sgdv3_null, acmodel_loc->get_absolute_view_pos());
590 SGV3d_help = model_or.rotateBack(
591 surf_or.rotateBack(SGVec3d(sgdv3_help[0],
592 sgdv3_help[1], sgdv3_help[2])));
593 sgSetVec3( model_vel, SGV3d_help[0], SGV3d_help[1], SGV3d_help[2]);
595 if (delta_time_sec > 0) {
596 sgScaleVec3( model_vel, 1 / delta_time_sec );
597 sgScaleVec3( listener_vel, 1 / delta_time_sec );
600 // checking, if the listener pos has moved suddenly
601 if (sgLengthVec3(listener_vel) > 1000)
603 // check if the relative speed model vs listener has moved suddenly, too
605 sgSubVec3(delta_vel, listener_vel, model_vel );
606 if (sgLengthVec3(delta_vel) > 1000)
607 sgSetVec3(listener_vel, model_vel[0], model_vel[1], model_vel[2] ); // a sane value
609 globals->get_soundmgr()->set_listener_vel( listener_vel );
612 globals->get_soundmgr()->set_listener_vel( listener_vel );
614 // set positional offset for sources
615 sgdVec3 dsource_pos_offset;
616 sgdSubVec3( dsource_pos_offset,
617 (double*) ¤t_view->get_view_pos(),
618 acmodel_loc->get_absolute_view_pos() );
619 SGVec3d sgv_dsource_pos_offset = model_or.rotateBack(
620 surf_or.rotateBack(SGVec3d(dsource_pos_offset[0],
621 dsource_pos_offset[1], dsource_pos_offset[2])));
623 sgVec3 source_pos_offset;
624 sgSetVec3(source_pos_offset, sgv_dsource_pos_offset[0],
625 sgv_dsource_pos_offset[1], sgv_dsource_pos_offset[2]);
627 globals->get_soundmgr()->set_source_pos_all( source_pos_offset );
630 for (int i = 0; i < 3; i++) {
631 orient[i] = sgv_at[i];
632 orient[i + 3] = sgv_up[i];
634 globals->get_soundmgr()->set_listener_orientation( orient );
637 // all sources are defined to be in the model
638 globals->get_soundmgr()->set_source_vel_all( model_vel );
640 // The listener is always positioned at the origin.
642 sgSetVec3( listener_pos, 0.0, 0.0, 0.0 );
643 globals->get_soundmgr()->set_listener_pos( listener_pos );
646 // END Tile Manager udpates
648 if (!scenery_loaded && globals->get_tile_mgr()->isSceneryLoaded()
649 && cur_fdm_state->get_inited()) {
650 fgSetBool("sim/sceneryloaded",true);
651 fgSetFloat("/sim/sound/volume", init_volume);
652 globals->get_soundmgr()->set_volume(init_volume);
657 SG_LOG( SG_ALL, SG_DEBUG, "" );
660 // Operation for querying OpenGL parameters. This must be done in a
661 // valid OpenGL context, potentially in another thread.
664 struct GeneralInitOperation : public GraphicsContextOperation
666 GeneralInitOperation()
667 : GraphicsContextOperation(std::string("General init"))
670 void run(osg::GraphicsContext* gc)
672 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
673 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
674 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
675 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
678 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
679 general.set_glMaxTexSize( tmp );
680 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
682 glGetIntegerv( GL_DEPTH_BITS, &tmp );
683 general.set_glDepthBits( tmp );
684 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
689 // This is the top level master main function that is registered as
692 // The first few passes take care of initialization things (a couple
693 // per pass) and once everything has been initialized fgMainLoop from
696 static void fgIdleFunction ( void ) {
697 static osg::ref_ptr<GeneralInitOperation> genOp;
698 if ( idle_state == 0 ) {
700 // Pick some window on which to do queries.
701 // XXX Perhaps all this graphics initialization code should be
702 // moved to renderer.cxx?
703 genOp = new GeneralInitOperation;
704 osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
705 WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
706 osg::GraphicsContext* gc = 0;
708 gc = guiCamera->getGraphicsContext();
710 gc->add(genOp.get());
712 wsa->windows[0]->gc->add(genOp.get());
715 } else if ( idle_state == 1 ) {
717 if (!genOp->isFinished())
721 if (!guiFinishInit())
724 fgSplashProgress("reading aircraft list");
727 } else if ( idle_state == 2 ) {
729 // Read the list of available aircraft
731 fgSplashProgress("reading airport & navigation data");
734 } else if ( idle_state == 3 ) {
737 fgSplashProgress("setting up scenery");
740 } else if ( idle_state == 4 ) {
742 // based on the requested presets, calculate the true starting
745 fgInitTowerLocationListener();
747 SGTime *t = fgInitTime();
748 globals->set_time_params( t );
750 // Do some quick general initializations
751 if( !fgInitGeneral()) {
752 SG_LOG( SG_GENERAL, SG_ALERT,
753 "General initialization failed ..." );
757 ////////////////////////////////////////////////////////////////////
758 // Initialize the property-based built-in commands
759 ////////////////////////////////////////////////////////////////////
763 ////////////////////////////////////////////////////////////////////
764 // Initialize the material manager
765 ////////////////////////////////////////////////////////////////////
766 globals->set_matlib( new SGMaterialLib );
767 simgear::SGModelLib::init(globals->get_fg_root());
770 ////////////////////////////////////////////////////////////////////
771 // Initialize the TG scenery subsystem.
772 ////////////////////////////////////////////////////////////////////
773 globals->set_scenery( new FGScenery );
774 globals->get_scenery()->init();
775 globals->get_scenery()->bind();
776 globals->set_tile_mgr( new FGTileMgr );
779 ////////////////////////////////////////////////////////////////////
780 // Initialize the general model subsystem.
781 ////////////////////////////////////////////////////////////////////
782 globals->set_model_mgr(new FGModelMgr);
783 globals->get_model_mgr()->init();
784 globals->get_model_mgr()->bind();
785 fgSplashProgress("loading aircraft");
788 } else if ( idle_state == 5 ) {
790 ////////////////////////////////////////////////////////////////////
791 // Initialize the 3D aircraft model subsystem (has a dependency on
792 // the scenery subsystem.)
793 ////////////////////////////////////////////////////////////////////
794 globals->set_aircraft_model(new FGAircraftModel);
795 globals->get_aircraft_model()->init();
796 globals->get_aircraft_model()->bind();
798 ////////////////////////////////////////////////////////////////////
799 // Initialize the view manager subsystem.
800 ////////////////////////////////////////////////////////////////////
801 FGViewMgr *viewmgr = new FGViewMgr;
802 globals->set_viewmgr( viewmgr );
805 fgSplashProgress("generating sky elements");
808 } else if ( idle_state == 6 ) {
810 // Initialize the sky
811 SGPath ephem_data_path( globals->get_fg_root() );
812 ephem_data_path.append( "Astro" );
813 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
814 ephem->update( globals->get_time_params()->getMjd(),
815 globals->get_time_params()->getLst(),
817 globals->set_ephem( ephem );
819 // TODO: move to environment mgr
821 SGPath texture_path(globals->get_fg_root());
822 texture_path.append("Textures");
823 texture_path.append("Sky");
824 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
825 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
826 thesky->add_cloud_layer(layer);
829 SGPath sky_tex_path( globals->get_fg_root() );
830 sky_tex_path.append( "Textures" );
831 sky_tex_path.append( "Sky" );
832 thesky->texture_path( sky_tex_path.str() );
834 // The sun and moon diameters are scaled down numbers of the
835 // actual diameters. This was needed to fit both the sun and the
836 // moon within the distance to the far clip plane.
837 // Moon diameter: 3,476 kilometers
838 // Sun diameter: 1,390,000 kilometers
839 thesky->build( 80000.0, 80000.0,
841 globals->get_ephem()->getNumPlanets(),
842 globals->get_ephem()->getPlanets(),
843 globals->get_ephem()->getNumStars(),
844 globals->get_ephem()->getStars(),
845 fgGetNode("/environment", true));
847 // Initialize MagVar model
848 SGMagVar *magvar = new SGMagVar();
849 globals->set_mag( magvar );
852 // kludge to initialize mag compass
853 // (should only be done for in-flight
855 // update magvar model
856 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
857 * SGD_DEGREES_TO_RADIANS,
858 fgGetDouble("/position/latitude-deg")
859 * SGD_DEGREES_TO_RADIANS,
860 fgGetDouble("/position/altitude-ft")
862 globals->get_time_params()->getJD() );
863 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
864 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
865 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
868 // airport = new ssgBranch;
869 // airport->setName( "Airport Lighting" );
870 // lighting->addKid( airport );
872 // build our custom render states
873 fgSplashProgress("initializing subsystems");
876 } else if ( idle_state == 7 ) {
878 // Initialize audio support
879 #ifdef ENABLE_AUDIO_SUPPORT
881 // Start the intro music
882 if ( fgGetBool("/sim/startup/intro-music") ) {
883 SGPath mp3file( globals->get_fg_root() );
884 mp3file.append( "Sounds/intro.mp3" );
886 SG_LOG( SG_GENERAL, SG_INFO,
887 "Starting intro music: " << mp3file.str() );
889 #if defined( __CYGWIN__ )
890 string command = "start /m `cygpath -w " + mp3file.str() + "`";
891 #elif defined( WIN32 )
892 string command = "start /m " + mp3file.str();
894 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
897 system ( command.c_str() );
900 // This is the top level init routine which calls all the
901 // other subsystem initialization routines. If you are adding
902 // a subsystem to flightgear, its initialization call should be
903 // located in this routine.
904 if( !fgInitSubsystems()) {
905 SG_LOG( SG_GENERAL, SG_ALERT,
906 "Subsystem initialization failed ..." );
909 fgSplashProgress("setting up time & renderer");
912 } else if ( idle_state == 8 ) {
914 // Initialize the time offset (warp) after fgInitSubsystem
915 // (which initializes the lighting interpolation tables.)
918 // setup OpenGL view parameters
919 globals->get_renderer()->init();
921 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
922 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
923 fgGetInt("/sim/startup/ysize") );
925 fgSplashProgress("loading scenery objects");
929 if ( idle_state == 1000 ) {
930 // We've finished all our initialization steps, from now on we
931 // run the main loop.
932 fgSetBool("sim/sceneryloaded", false);
933 fgRegisterIdleHandler( fgMainLoop );
938 static void upper_case_property(const char *name)
940 SGPropertyNode *p = fgGetNode(name, false);
942 p = fgGetNode(name, true);
943 p->setStringValue("");
945 SGPropertyNode::Type t = p->getType();
946 if (t == SGPropertyNode::NONE || t == SGPropertyNode::UNSPECIFIED)
947 p->setStringValue("");
949 assert(t == SGPropertyNode::STRING);
951 p->addChangeListener(new FGMakeUpperCase);
955 // Main top level initialization
956 bool fgMainInit( int argc, char **argv ) {
958 // set default log levels
959 sglog().setLogLevels( SG_ALL, SG_ALERT );
962 #ifdef FLIGHTGEAR_VERSION
963 version = FLIGHTGEAR_VERSION;
965 version = "unknown version";
967 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
969 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
971 // Allocate global data structures. This needs to happen before
972 // we parse command line options
974 globals = new FGGlobals;
976 // seed the random number generator
979 FGControls *controls = new FGControls;
980 globals->set_controls( controls );
982 string_list *col = new string_list;
983 globals->set_channel_options_list( col );
985 fgValidatePath("", false); // initialize static variables
986 upper_case_property("/sim/presets/airport-id");
987 upper_case_property("/sim/presets/runway");
988 upper_case_property("/sim/tower/airport-id");
989 upper_case_property("/autopilot/route-manager/input");
991 // Scan the config file(s) and command line options to see if
992 // fg_root was specified (ignore all other options for now)
993 fgInitFGRoot(argc, argv);
995 // Check for the correct base package version
996 static char required_version[] = "1.0.0";
997 string base_version = fgBasePackageVersion();
998 if ( !(base_version == required_version) ) {
999 // tell the operator how to use this application
1001 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
1002 cerr << endl << "Base package check failed ... " \
1003 << "Found version " << base_version << " at: " \
1004 << globals->get_fg_root() << endl;
1005 cerr << "Please upgrade to version: " << required_version << endl;
1007 cerr << "Hit a key to continue..." << endl;
1013 // Load the configuration parameters. (Command line options
1014 // override config file options. Config file options override
1016 if ( !fgInitConfig(argc, argv) ) {
1017 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
1021 // Initialize the Window/Graphics environment.
1022 fgOSInit(&argc, argv);
1023 _bootstrap_OSInit++;
1025 fgRegisterWindowResizeHandler( &FGRenderer::resize );
1026 fgRegisterIdleHandler( &fgIdleFunction );
1027 fgRegisterDrawHandler( &FGRenderer::update );
1029 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
1030 bool get_stencil_buffer = true;
1032 bool get_stencil_buffer = false;
1035 // Initialize plib net interface
1036 netInit( &argc, argv );
1038 // Clouds3D requires an alpha channel
1039 // clouds may require stencil buffer
1040 fgOSOpenWindow(get_stencil_buffer);
1042 // Initialize the splash screen right away
1046 // pass control off to the master event handler
1049 // we never actually get here ... but to avoid compiler warnings,