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 #ifdef SG_MATH_EXCEPTION_CLASH
44 #include <plib/netSocket.h>
46 #include <simgear/props/props.hxx>
47 #include <simgear/timing/sg_time.hxx>
48 #include <simgear/math/sg_random.h>
50 #include <osgDB/Registry>
53 #include <simgear/ephemeris/ephemeris.hxx>
54 #include <simgear/scene/model/modellib.hxx>
55 #include <simgear/scene/material/matlib.hxx>
56 #include <simgear/scene/model/animation.hxx>
57 #include <simgear/scene/sky/sky.hxx>
58 #include <Time/light.hxx>
59 #include <Include/general.hxx>
60 #include <Aircraft/replay.hxx>
61 #include <Cockpit/cockpit.hxx>
62 #include <Cockpit/hud.hxx>
63 #include <Model/panelnode.hxx>
64 #include <Model/modelmgr.hxx>
65 #include <Model/acmodel.hxx>
66 #include <Scenery/scenery.hxx>
67 #include <Scenery/tilemgr.hxx>
68 #include <Sound/beacon.hxx>
69 #include <Sound/morse.hxx>
70 #include <FDM/flight.hxx>
71 #include <ATCDCL/ATCmgr.hxx>
72 #include <ATCDCL/AIMgr.hxx>
73 #include <Time/tmp.hxx>
74 #include <Time/fg_timer.hxx>
75 #include <Environment/environment_mgr.hxx>
76 #include <GUI/new_gui.hxx>
77 #include <MultiPlayer/multiplaymgr.hxx>
79 #include "fg_commands.hxx"
81 #include "renderer.hxx"
86 static double real_delta_time_sec = 0.0;
87 double delta_time_sec = 0.0;
88 extern float init_volume;
92 # include <console.h> // -dw- for command line dialog
95 // This is a record containing a bit of global housekeeping information
98 // Specify our current idle function state. This is used to run all
99 // our initializations out of the idle callback so that we can get a
100 // splash screen up and running right away.
102 long global_multi_loop;
104 SGTimeStamp last_time_stamp;
105 SGTimeStamp current_time_stamp;
107 // The atexit() function handler should know when the graphical subsystem
109 extern int _bootstrap_OSInit;
113 // Update internal time dependent calculations (i.e. flight model)
114 // FIXME: this distinction is obsolete; all subsystems now get delta
116 void fgUpdateTimeDepCalcs() {
117 static bool inited = false;
119 static const SGPropertyNode *replay_state
120 = fgGetNode( "/sim/freeze/replay-state", true );
121 static SGPropertyNode *replay_time
122 = fgGetNode( "/sim/replay/time", true );
123 // static const SGPropertyNode *replay_end_time
124 // = fgGetNode( "/sim/replay/end-time", true );
126 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
128 // Initialize the FDM here if it hasn't been and if we have a
129 // scenery elevation hit.
131 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
132 // << " cur_elev = " << scenery.get_cur_elev() << endl;
134 if (!cur_fdm_state->get_inited()) {
135 // Check for scenery around the aircraft.
136 double lon = fgGetDouble("/sim/presets/longitude-deg");
137 double lat = fgGetDouble("/sim/presets/latitude-deg");
138 // We require just to have 50 meter scenery availabe around
140 double range = 1000.0;
141 if (globals->get_scenery()->scenery_available(lat, lon, range)) {
142 //SG_LOG(SG_FLIGHT, SG_INFO, "Finally initializing fdm");
143 cur_fdm_state->init();
144 if ( cur_fdm_state->get_bound() ) {
145 cur_fdm_state->unbind();
147 cur_fdm_state->bind();
151 // conceptually, the following block could be done for each fdm
153 if ( cur_fdm_state->get_inited() ) {
154 // we have been inited, and we are good to go ...
156 if ( replay_state->getIntValue() == 0 ) {
157 // replay off, run fdm
158 cur_fdm_state->update( delta_time_sec );
160 FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
161 r->replay( replay_time->getDoubleValue() );
162 if ( replay_state->getIntValue() == 1 ) {
164 replay_time->setDoubleValue( replay_time->getDoubleValue()
166 * fgGetInt("/sim/speed-up") ) );
167 } else if ( replay_state->getIntValue() == 2 ) {
168 // paused playback (don't advance replay time)
174 fgSetBool("/sim/signals/fdm-initialized", true);
178 // do nothing, fdm isn't inited yet
181 globals->get_model_mgr()->update(delta_time_sec);
182 globals->get_aircraft_model()->update(delta_time_sec);
184 // Update solar system
185 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
186 globals->get_time_params()->getLst(),
187 cur_fdm_state->get_Latitude() );
192 void fgInitTimeDepCalcs( void ) {
197 static const double alt_adjust_ft = 3.758099;
198 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
201 // What should we do when we have nothing else to do? Let's get ready
202 // for the next move and update the display?
203 static void fgMainLoop( void ) {
204 int model_hz = fgGetInt("/sim/model-hz");
206 static SGConstPropertyNode_ptr longitude
207 = fgGetNode("/position/longitude-deg");
208 static SGConstPropertyNode_ptr latitude
209 = fgGetNode("/position/latitude-deg");
210 static SGConstPropertyNode_ptr altitude
211 = fgGetNode("/position/altitude-ft");
212 static SGConstPropertyNode_ptr clock_freeze
213 = fgGetNode("/sim/freeze/clock", true);
214 static SGConstPropertyNode_ptr cur_time_override
215 = fgGetNode("/sim/time/cur-time-override", true);
216 static SGConstPropertyNode_ptr max_simtime_per_frame
217 = fgGetNode("/sim/max-simtime-per-frame", true);
218 static SGPropertyNode_ptr frame_signal
219 = fgGetNode("/sim/signals/frame", true);
221 frame_signal->fireValueChanged();
222 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
224 bool scenery_loaded = fgGetBool("sim/sceneryloaded");
225 bool wait_for_scenery = !(scenery_loaded || fgGetBool("sim/sceneryloaded-override"));
227 // Update the elapsed time.
228 static bool first_time = true;
230 last_time_stamp.stamp();
234 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
235 if ( throttle_hz > 0.0 && !wait_for_scenery ) {
236 // optionally throttle the frame rate (to get consistent frame
237 // rates or reduce cpu usage.
239 double frame_us = 1000000.0 / throttle_hz;
241 #define FG_SLEEP_BASED_TIMING 1
242 #if defined(FG_SLEEP_BASED_TIMING)
243 // sleep based timing loop.
245 // Calling sleep, even usleep() on linux is less accurate than
246 // we like, but it does free up the cpu for other tasks during
247 // the sleep so it is desirable. Because of the way sleep()
248 // is implemented in consumer operating systems like windows
249 // and linux, you almost always sleep a little longer than the
252 // To combat the problem of sleeping too long, we calculate the
253 // desired wait time and shorten it by 2000us (2ms) to avoid
254 // [hopefully] over-sleep'ing. The 2ms value was arrived at
255 // via experimentation. We follow this up at the end with a
256 // simple busy-wait loop to get the final pause timing exactly
259 // Assuming we don't oversleep by more than 2000us, this
260 // should be a reasonable compromise between sleep based
261 // waiting, and busy waiting.
263 // sleep() will always overshoot by a bit so undersleep by
264 // 2000us in the hopes of never oversleeping.
266 if ( frame_us < 0.0 ) {
269 current_time_stamp.stamp();
271 double elapsed_us = current_time_stamp - last_time_stamp;
272 if ( elapsed_us < frame_us ) {
273 double requested_us = frame_us - elapsed_us;
274 ulMilliSecondSleep ( (int)(requested_us / 1000.0) ) ;
278 // busy wait timing loop.
280 // This yields the most accurate timing. If the previous
281 // ulMilliSecondSleep() call is omitted this will peg the cpu
282 // (which is just fine if FG is the only app you care about.)
283 current_time_stamp.stamp();
284 while ( current_time_stamp - last_time_stamp < frame_us ) {
285 current_time_stamp.stamp();
288 // run as fast as the app will go
289 current_time_stamp.stamp();
293 = double(current_time_stamp - last_time_stamp) / 1000000.0;
295 // Limit the time we need to spend in simulation loops
296 // That means, if the /sim/max-simtime-per-frame value is strictly positive
297 // you can limit the maximum amount of time you will do simulations for
298 // one frame to display. The cpu time spent in simulations code is roughly
299 // at least O(real_delta_time_sec). If this is (due to running debug
300 // builds or valgrind or something different blowing up execution times)
301 // larger than the real time you will no longer get any response
302 // from flightgear. This limits that effect. Just set to property from
303 // your .fgfsrc or commandline ...
304 double dtMax = max_simtime_per_frame->getDoubleValue();
305 if (0 < dtMax && dtMax < real_delta_time_sec)
306 real_delta_time_sec = dtMax;
308 // round the real time down to a multiple of 1/model-hz.
309 // this way all systems are updated the _same_ amount of dt.
311 static double rem = 0.0;
312 real_delta_time_sec += rem;
313 double hz = model_hz;
314 double nit = floor(real_delta_time_sec*hz);
315 rem = real_delta_time_sec - nit/hz;
316 real_delta_time_sec = nit/hz;
320 if (clock_freeze->getBoolValue() || wait_for_scenery) {
323 delta_time_sec = real_delta_time_sec;
325 last_time_stamp = current_time_stamp;
326 globals->inc_sim_time_sec( delta_time_sec );
328 // These are useful, especially for Nasal scripts.
329 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
330 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
332 static long remainder = 0;
334 #ifdef FANCY_FRAME_COUNTER
338 static time_t last_time = 0;
339 static int frames = 0;
340 #endif // FANCY_FRAME_COUNTER
342 SGTime *t = globals->get_time_params();
344 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
345 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
347 #if defined( ENABLE_PLIB_JOYSTICK )
348 // Read joystick and update control settings
349 // if ( fgGetString("/sim/control-mode") == "joystick" )
355 // Fix elevation. I'm just sticking this here for now, it should
356 // probably move eventually
358 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
359 scenery.get_cur_elev(),
360 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
361 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
363 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
364 scenery.get_cur_elev(),
365 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
366 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
368 // cout << "Warp = " << globals->get_warp() << endl;
371 static bool last_clock_freeze = false;
373 if ( clock_freeze->getBoolValue() ) {
374 // clock freeze requested
375 if ( cur_time_override->getLongValue() == 0 ) {
376 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
377 globals->set_warp( 0 );
380 // no clock freeze requested
381 if ( last_clock_freeze == true ) {
382 // clock just unfroze, let's set warp as the difference
383 // between frozen time and current time so we don't get a
384 // time jump (and corresponding sky object and lighting
386 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
387 fgSetLong( "/sim/time/cur-time-override", 0 );
389 if ( globals->get_warp_delta() != 0 ) {
390 globals->inc_warp( globals->get_warp_delta() );
394 last_clock_freeze = clock_freeze->getBoolValue();
396 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
397 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
398 cur_time_override->getLongValue(),
399 globals->get_warp() );
401 if (globals->get_warp_delta() != 0) {
402 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
406 // update magvar model
407 globals->get_mag()->update( longitude->getDoubleValue()
408 * SGD_DEGREES_TO_RADIANS,
409 latitude->getDoubleValue()
410 * SGD_DEGREES_TO_RADIANS,
411 altitude->getDoubleValue() * SG_FEET_TO_METER,
412 globals->get_time_params()->getJD() );
414 // Get elapsed time (in usec) for this past frame
415 elapsed = fgGetTimeInterval();
416 SG_LOG( SG_ALL, SG_DEBUG,
417 "Elapsed time interval is = " << elapsed
418 << ", previous remainder is = " << remainder );
420 // Calculate frame rate average
421 #ifdef FANCY_FRAME_COUNTER
422 /* old fps calculation */
426 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
427 tmp = general.get_frame(i);
429 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
430 general.set_frame(i+1,tmp);
432 tmp = 1000000.0 / (float)elapsed;
433 general.set_frame(0,tmp);
434 // printf("frame[0] = %.2f\n", general.frames[0]);
436 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
437 // printf("ave = %.2f\n", general.frame_rate);
440 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
441 general.set_frame_rate( frames );
442 fgSetInt("/sim/frame-rate", frames);
443 SG_LOG( SG_ALL, SG_DEBUG,
444 "--> Frame rate is = " << general.get_frame_rate() );
447 last_time = t->get_cur_time();
451 // Update any multiplayer's network queues, the AIMultiplayer
452 // implementation is an AI model and depends on that
453 globals->get_multiplayer_mgr()->Update();
456 if (fgGetBool("/sim/atc/enabled"))
457 globals->get_ATC_mgr()->update(delta_time_sec);
459 // Run the AI subsystem
460 // FIXME: run that also if we have multiplaying enabled since the
461 // multiplayer information is interpreted by an AI model
462 if (fgGetBool("/sim/ai-traffic/enabled"))
463 globals->get_AI_mgr()->update(delta_time_sec);
467 // Calculate model iterations needed for next frame
468 elapsed += remainder;
470 global_multi_loop = (long)(((double)elapsed * 0.000001) * model_hz );
471 remainder = elapsed - ( (global_multi_loop*1000000) / model_hz );
472 SG_LOG( SG_ALL, SG_DEBUG,
473 "Model iterations needed = " << global_multi_loop
474 << ", new remainder = " << remainder );
476 // chop max iterations to something reasonable if the sim was
477 // delayed for an excessive amount of time
478 if ( global_multi_loop > 2.0 * model_hz ) {
479 global_multi_loop = (int)(2.0 * model_hz );
484 if ( global_multi_loop > 0) {
485 // first run the flight model each frame until it is initialized
486 // then continue running each frame only after initial scenery load is complete.
487 fgUpdateTimeDepCalcs();
489 SG_LOG( SG_ALL, SG_DEBUG,
490 "Elapsed time is zero ... we're zinging" );
493 // Run audio scheduler
494 #ifdef ENABLE_AUDIO_SUPPORT
495 if ( globals->get_soundmgr()->is_working() ) {
496 globals->get_soundmgr()->update( delta_time_sec );
500 globals->get_subsystem_mgr()->update(delta_time_sec);
503 // Tile Manager updates - see if we need to load any new scenery tiles.
504 // this code ties together the fdm, viewer and scenery classes...
505 // we may want to move this to its own class at some point
507 double visibility_meters = fgGetDouble("/environment/visibility-m");
508 FGViewer *current_view = globals->get_current_view();
510 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
511 // update tile manager for view...
512 SGLocation *view_location = globals->get_current_view()->getSGLocation();
513 globals->get_tile_mgr()->update( view_location, visibility_meters );
515 double lon = view_location->getLongitude_deg();
516 double lat = view_location->getLatitude_deg();
517 double alt = view_location->getAltitudeASL_ft() * SG_FEET_TO_METER;
519 // check if we can reuse the groundcache for that purpose.
522 bool valid = cur_fdm_state->is_valid_m(&ref_time, pt.sg(), &r);
523 SGVec3d viewpos(globals->get_current_view()->get_view_pos());
524 if (valid && distSqr(viewpos, pt) < r*r) {
525 // Reuse the cache ...
527 = cur_fdm_state->get_groundlevel_m(lat*SGD_DEGREES_TO_RADIANS,
528 lon*SGD_DEGREES_TO_RADIANS,
530 view_location->set_cur_elev_m( lev );
532 // Do full intersection test.
534 if (globals->get_scenery()->get_elevation_m(lat, lon, alt+2, lev, 0))
535 view_location->set_cur_elev_m( lev );
537 view_location->set_cur_elev_m( -9999.0 );
541 // run Nasal's settimer() loops right before the view manager
542 globals->get_event_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_visitor_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 visitor and model
587 sgVec3 listener_vel, model_vel;
590 sgdVec3 sgdv3_null = {0, 0, 0};
592 sgdSubVec3( sgdv3_help,
593 last_visitor_pos, (double *)¤t_view->get_view_pos());
594 sgdAddVec3( last_visitor_pos, sgdv3_null, (double *)¤t_view->get_view_pos());
595 SGV3d_help = model_or.rotateBack(
596 surf_or.rotateBack(SGVec3d(sgdv3_help[0],
597 sgdv3_help[1], sgdv3_help[2])));
598 sgSetVec3( listener_vel, SGV3d_help[0], SGV3d_help[1], SGV3d_help[2]);
600 sgdSubVec3( sgdv3_help,
601 last_model_pos, acmodel_loc->get_absolute_view_pos());
602 sgdAddVec3( last_model_pos, sgdv3_null, acmodel_loc->get_absolute_view_pos());
603 SGV3d_help = model_or.rotateBack(
604 surf_or.rotateBack(SGVec3d(sgdv3_help[0],
605 sgdv3_help[1], sgdv3_help[2])));
606 sgSetVec3( model_vel, SGV3d_help[0], SGV3d_help[1], SGV3d_help[2]);
608 if (delta_time_sec > 0) {
609 sgScaleVec3( model_vel, 1 / delta_time_sec );
610 sgScaleVec3( listener_vel, 1 / delta_time_sec );
613 // checking, if the listener pos has moved suddenly
614 if (sgLengthVec3(listener_vel) > 1000)
616 // check if the relative speed model vs listener has moved suddenly, too
618 sgSubVec3(delta_vel, listener_vel, model_vel );
619 if (sgLengthVec3(delta_vel) > 1000)
620 sgSetVec3(listener_vel, model_vel[0], model_vel[1], model_vel[2] ); // a sane value
622 globals->get_soundmgr()->set_listener_vel( listener_vel );
625 globals->get_soundmgr()->set_listener_vel( listener_vel );
627 // set positional offset for sources
628 sgdVec3 dsource_pos_offset;
629 sgdSubVec3( dsource_pos_offset,
630 (double*) ¤t_view->get_view_pos(),
631 acmodel_loc->get_absolute_view_pos() );
632 SGVec3d sgv_dsource_pos_offset = model_or.rotateBack(
633 surf_or.rotateBack(SGVec3d(dsource_pos_offset[0],
634 dsource_pos_offset[1], dsource_pos_offset[2])));
636 sgVec3 source_pos_offset;
637 sgSetVec3(source_pos_offset, sgv_dsource_pos_offset[0],
638 sgv_dsource_pos_offset[1], sgv_dsource_pos_offset[2]);
640 globals->get_soundmgr()->set_source_pos_all( source_pos_offset );
643 for (int i = 0; i < 3; i++) {
644 orient[i] = sgv_at[i];
645 orient[i + 3] = sgv_up[i];
647 globals->get_soundmgr()->set_listener_orientation( orient );
650 // all sources are defined to be in the model
651 globals->get_soundmgr()->set_source_vel_all( model_vel );
653 // The listener is always positioned at the origin.
655 sgSetVec3( listener_pos, 0.0, 0.0, 0.0 );
656 globals->get_soundmgr()->set_listener_pos( listener_pos );
659 // END Tile Manager udpates
661 if (!scenery_loaded && globals->get_tile_mgr()->isSceneryLoaded()
662 && cur_fdm_state->get_inited()) {
663 fgSetBool("sim/sceneryloaded",true);
664 fgSetFloat("/sim/sound/volume", init_volume);
665 globals->get_soundmgr()->set_volume(init_volume);
670 SG_LOG( SG_ALL, SG_DEBUG, "" );
674 // This is the top level master main function that is registered as
677 // The first few passes take care of initialization things (a couple
678 // per pass) and once everything has been initialized fgMainLoop from
681 static void fgIdleFunction ( void ) {
682 if ( idle_state == 0 ) {
685 // This seems to be the absolute earliest in the init sequence
686 // that these calls will return valid info. Too bad it's after
687 // we've already created and sized our window. :-(
688 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
689 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
690 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
691 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
694 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
695 general.set_glMaxTexSize( tmp );
696 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
698 glGetIntegerv( GL_DEPTH_BITS, &tmp );
699 general.set_glDepthBits( tmp );
700 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
702 // Initialize the user interface so that we can use fonts
706 } else if ( idle_state == 1 ) {
707 if (!guiFinishInit())
710 fgSplashProgress("reading aircraft list");
713 } else if ( idle_state == 2 ) {
715 // Read the list of available aircraft
717 fgSplashProgress("reading airport & navigation data");
720 } else if ( idle_state == 3 ) {
723 fgSplashProgress("setting up scenery");
726 } else if ( idle_state == 4 ) {
728 // based on the requested presets, calculate the true starting
731 fgInitTowerLocationListener();
733 SGTime *t = fgInitTime();
734 globals->set_time_params( t );
736 // Do some quick general initializations
737 if( !fgInitGeneral()) {
738 SG_LOG( SG_GENERAL, SG_ALERT,
739 "General initialization failed ..." );
743 ////////////////////////////////////////////////////////////////////
744 // Initialize the property-based built-in commands
745 ////////////////////////////////////////////////////////////////////
749 ////////////////////////////////////////////////////////////////////
750 // Initialize the material manager
751 ////////////////////////////////////////////////////////////////////
752 globals->set_matlib( new SGMaterialLib );
753 simgear::SGModelLib::init(globals->get_fg_root());
756 ////////////////////////////////////////////////////////////////////
757 // Initialize the TG scenery subsystem.
758 ////////////////////////////////////////////////////////////////////
759 globals->set_scenery( new FGScenery );
760 globals->get_scenery()->init();
761 globals->get_scenery()->bind();
762 globals->set_tile_mgr( new FGTileMgr );
765 ////////////////////////////////////////////////////////////////////
766 // Initialize the general model subsystem.
767 ////////////////////////////////////////////////////////////////////
768 globals->set_model_mgr(new FGModelMgr);
769 globals->get_model_mgr()->init();
770 globals->get_model_mgr()->bind();
771 fgSplashProgress("loading aircraft");
774 } else if ( idle_state == 5 ) {
776 ////////////////////////////////////////////////////////////////////
777 // Initialize the 3D aircraft model subsystem (has a dependency on
778 // the scenery subsystem.)
779 ////////////////////////////////////////////////////////////////////
780 globals->set_aircraft_model(new FGAircraftModel);
781 globals->get_aircraft_model()->init();
782 globals->get_aircraft_model()->bind();
784 ////////////////////////////////////////////////////////////////////
785 // Initialize the view manager subsystem.
786 ////////////////////////////////////////////////////////////////////
787 FGViewMgr *viewmgr = new FGViewMgr;
788 globals->set_viewmgr( viewmgr );
791 fgSplashProgress("generating sky elements");
794 } else if ( idle_state == 6 ) {
796 // Initialize the sky
797 SGPath ephem_data_path( globals->get_fg_root() );
798 ephem_data_path.append( "Astro" );
799 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
800 ephem->update( globals->get_time_params()->getMjd(),
801 globals->get_time_params()->getLst(),
803 globals->set_ephem( ephem );
805 // TODO: move to environment mgr
807 SGPath texture_path(globals->get_fg_root());
808 texture_path.append("Textures");
809 texture_path.append("Sky");
810 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
811 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
812 thesky->add_cloud_layer(layer);
815 SGPath sky_tex_path( globals->get_fg_root() );
816 sky_tex_path.append( "Textures" );
817 sky_tex_path.append( "Sky" );
818 thesky->texture_path( sky_tex_path.str() );
820 // The sun and moon diameters are scaled down numbers of the
821 // actual diameters. This was needed to fit both the sun and the
822 // moon within the distance to the far clip plane.
823 // Moon diameter: 3,476 kilometers
824 // Sun diameter: 1,390,000 kilometers
825 thesky->build( 80000.0, 80000.0,
827 globals->get_ephem()->getNumPlanets(),
828 globals->get_ephem()->getPlanets(),
829 globals->get_ephem()->getNumStars(),
830 globals->get_ephem()->getStars(),
831 fgGetNode("/environment", true));
833 // Initialize MagVar model
834 SGMagVar *magvar = new SGMagVar();
835 globals->set_mag( magvar );
838 // kludge to initialize mag compass
839 // (should only be done for in-flight
841 // update magvar model
842 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
843 * SGD_DEGREES_TO_RADIANS,
844 fgGetDouble("/position/latitude-deg")
845 * SGD_DEGREES_TO_RADIANS,
846 fgGetDouble("/position/altitude-ft")
848 globals->get_time_params()->getJD() );
849 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
850 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
851 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
854 // airport = new ssgBranch;
855 // airport->setName( "Airport Lighting" );
856 // lighting->addKid( airport );
858 // build our custom render states
859 fgSplashProgress("initializing subsystems");
862 } else if ( idle_state == 7 ) {
864 // Initialize audio support
865 #ifdef ENABLE_AUDIO_SUPPORT
867 // Start the intro music
868 if ( fgGetBool("/sim/startup/intro-music") ) {
869 SGPath mp3file( globals->get_fg_root() );
870 mp3file.append( "Sounds/intro.mp3" );
872 SG_LOG( SG_GENERAL, SG_INFO,
873 "Starting intro music: " << mp3file.str() );
875 #if defined( __CYGWIN__ )
876 string command = "start /m `cygpath -w " + mp3file.str() + "`";
877 #elif defined( WIN32 )
878 string command = "start /m " + mp3file.str();
880 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
883 system ( command.c_str() );
887 // These are a few miscellaneous things that aren't really
888 // "subsystems" but still need to be initialized.
891 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
892 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
896 // This is the top level init routine which calls all the
897 // other subsystem initialization routines. If you are adding
898 // a subsystem to flightgear, its initialization call should be
899 // located in this routine.
900 if( !fgInitSubsystems()) {
901 SG_LOG( SG_GENERAL, SG_ALERT,
902 "Subsystem initialization failed ..." );
905 fgSplashProgress("setting up time & renderer");
908 } else if ( idle_state == 8 ) {
910 // Initialize the time offset (warp) after fgInitSubsystem
911 // (which initializes the lighting interpolation tables.)
914 // setup OpenGL view parameters
915 globals->get_renderer()->init();
917 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
918 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
919 fgGetInt("/sim/startup/ysize") );
921 fgSplashProgress("loading scenery objects");
925 if ( idle_state == 1000 ) {
926 // We've finished all our initialization steps, from now on we
927 // run the main loop.
928 fgSetBool("sim/sceneryloaded", false);
929 fgRegisterIdleHandler( fgMainLoop );
934 static void upper_case_property(const char *name)
936 SGPropertyNode *p = fgGetNode(name, false);
938 p = fgGetNode(name, true);
939 p->setStringValue("");
941 SGPropertyNode::Type t = p->getType();
942 if (t == SGPropertyNode::NONE || t == SGPropertyNode::UNSPECIFIED)
943 p->setStringValue("");
945 assert(t == SGPropertyNode::STRING);
947 p->addChangeListener(new FGMakeUpperCase);
951 // Main top level initialization
952 bool fgMainInit( int argc, char **argv ) {
954 #if defined( macintosh )
955 freopen ("stdout.txt", "w", stdout );
956 freopen ("stderr.txt", "w", stderr );
957 argc = ccommand( &argv );
960 // set default log levels
961 sglog().setLogLevels( SG_ALL, SG_ALERT );
964 #ifdef FLIGHTGEAR_VERSION
965 version = FLIGHTGEAR_VERSION;
967 version = "unknown version";
969 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
971 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
973 // Allocate global data structures. This needs to happen before
974 // we parse command line options
976 globals = new FGGlobals;
978 // seed the random number generator
981 FGControls *controls = new FGControls;
982 globals->set_controls( controls );
984 string_list *col = new string_list;
985 globals->set_channel_options_list( col );
987 upper_case_property("/sim/presets/airport-id");
988 upper_case_property("/sim/presets/runway");
989 upper_case_property("/sim/tower/airport-id");
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 #if !defined(__APPLE__) || defined(OSX_BUNDLE)
1023 // Mac OS X command line ("non-bundle") applications call this
1024 // from main(), in bootstrap.cxx. Andy doesn't know why, someone
1025 // feel free to add comments...
1026 fgOSInit(&argc, argv);
1027 _bootstrap_OSInit++;
1030 fgRegisterWindowResizeHandler( &FGRenderer::resize );
1031 fgRegisterIdleHandler( &fgIdleFunction );
1032 fgRegisterDrawHandler( &FGRenderer::update );
1034 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
1035 bool get_stencil_buffer = true;
1037 bool get_stencil_buffer = false;
1040 // Initialize plib net interface
1041 netInit( &argc, argv );
1043 // Clouds3D requires an alpha channel
1044 // clouds may require stencil buffer
1045 fgOSOpenWindow(get_stencil_buffer);
1047 // Initialize the splash screen right away
1051 // pass control off to the master event handler
1054 // we never actually get here ... but to avoid compiler warnings,