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>
51 #include <simgear/ephemeris/ephemeris.hxx>
52 #include <simgear/scene/model/modellib.hxx>
53 #include <simgear/scene/material/matlib.hxx>
54 #include <simgear/scene/model/animation.hxx>
55 #include <simgear/scene/sky/sky.hxx>
56 #include <Time/light.hxx>
57 #include <Include/general.hxx>
58 #include <Aircraft/replay.hxx>
59 #include <Cockpit/cockpit.hxx>
60 #include <Cockpit/hud.hxx>
61 #include <Model/panelnode.hxx>
62 #include <Model/modelmgr.hxx>
63 #include <Model/acmodel.hxx>
64 #include <Scenery/scenery.hxx>
65 #include <Scenery/tilemgr.hxx>
66 #include <Sound/beacon.hxx>
67 #include <Sound/morse.hxx>
68 #include <FDM/flight.hxx>
69 #include <ATC/ATCmgr.hxx>
70 #include <ATC/AIMgr.hxx>
71 #include <Time/tmp.hxx>
72 #include <Time/fg_timer.hxx>
73 #include <Environment/environment_mgr.hxx>
74 #include <GUI/new_gui.hxx>
75 #include <MultiPlayer/multiplaymgr.hxx>
77 #include "fg_commands.hxx"
79 #include "renderer.hxx"
85 static double real_delta_time_sec = 0.0;
86 double delta_time_sec = 0.0;
87 extern float init_volume;
91 # include <console.h> // -dw- for command line dialog
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
140 if (globals->get_tile_mgr()->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 ...
157 fgSetBool("/sim/signals/fdm-initialized", true);
160 if ( replay_state->getIntValue() == 0 ) {
161 // replay off, run fdm
162 cur_fdm_state->update( delta_time_sec );
164 FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
165 r->replay( replay_time->getDoubleValue() );
166 if ( replay_state->getIntValue() == 1 ) {
168 replay_time->setDoubleValue( replay_time->getDoubleValue()
170 * fgGetInt("/sim/speed-up") ) );
171 } else if ( replay_state->getIntValue() == 2 ) {
172 // paused playback (don't advance replay time)
176 // do nothing, fdm isn't inited yet
179 globals->get_model_mgr()->update(delta_time_sec);
180 globals->get_aircraft_model()->update(delta_time_sec);
182 // update the view angle
183 globals->get_viewmgr()->update(delta_time_sec);
185 // Update solar system
186 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
187 globals->get_time_params()->getLst(),
188 cur_fdm_state->get_Latitude() );
193 void fgInitTimeDepCalcs( void ) {
198 static const double alt_adjust_ft = 3.758099;
199 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
202 // What should we do when we have nothing else to do? Let's get ready
203 // for the next move and update the display?
204 static void fgMainLoop( void ) {
205 int model_hz = fgGetInt("/sim/model-hz");
207 static const SGPropertyNode *longitude
208 = fgGetNode("/position/longitude-deg");
209 static const SGPropertyNode *latitude
210 = fgGetNode("/position/latitude-deg");
211 static const SGPropertyNode *altitude
212 = fgGetNode("/position/altitude-ft");
213 static const SGPropertyNode *clock_freeze
214 = fgGetNode("/sim/freeze/clock", true);
215 static const SGPropertyNode *cur_time_override
216 = fgGetNode("/sim/time/cur-time-override", true);
217 static const SGPropertyNode *max_simtime_per_frame
218 = fgGetNode("/sim/max-simtime-per-frame", true);
220 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
222 bool scenery_loaded = fgGetBool("sim/sceneryloaded");
223 bool wait_for_scenery = !(scenery_loaded || fgGetBool("sim/sceneryloaded-override"));
225 // Update the elapsed time.
226 static bool first_time = true;
228 last_time_stamp.stamp();
232 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
233 if ( throttle_hz > 0.0 && !wait_for_scenery ) {
234 // optionally throttle the frame rate (to get consistent frame
235 // rates or reduce cpu usage.
237 double frame_us = 1000000.0 / throttle_hz;
239 #define FG_SLEEP_BASED_TIMING 1
240 #if defined(FG_SLEEP_BASED_TIMING)
241 // sleep based timing loop.
243 // Calling sleep, even usleep() on linux is less accurate than
244 // we like, but it does free up the cpu for other tasks during
245 // the sleep so it is desirable. Because of the way sleep()
246 // is implemented in consumer operating systems like windows
247 // and linux, you almost always sleep a little longer than the
250 // To combat the problem of sleeping too long, we calculate the
251 // desired wait time and shorten it by 2000us (2ms) to avoid
252 // [hopefully] over-sleep'ing. The 2ms value was arrived at
253 // via experimentation. We follow this up at the end with a
254 // simple busy-wait loop to get the final pause timing exactly
257 // Assuming we don't oversleep by more than 2000us, this
258 // should be a reasonable compromise between sleep based
259 // waiting, and busy waiting.
261 // sleep() will always overshoot by a bit so undersleep by
262 // 2000us in the hopes of never oversleeping.
264 if ( frame_us < 0.0 ) {
267 current_time_stamp.stamp();
269 double elapsed_us = current_time_stamp - last_time_stamp;
270 if ( elapsed_us < frame_us ) {
271 double requested_us = frame_us - elapsed_us;
272 ulMilliSecondSleep ( (int)(requested_us / 1000.0) ) ;
276 // busy wait timing loop.
278 // This yields the most accurate timing. If the previous
279 // ulMilliSecondSleep() call is omitted this will peg the cpu
280 // (which is just fine if FG is the only app you care about.)
281 current_time_stamp.stamp();
282 while ( current_time_stamp - last_time_stamp < frame_us ) {
283 current_time_stamp.stamp();
286 // run as fast as the app will go
287 current_time_stamp.stamp();
291 = double(current_time_stamp - last_time_stamp) / 1000000.0;
293 // Limit the time we need to spend in simulation loops
294 // That means, if the /sim/max-simtime-per-frame value is strictly positive
295 // you can limit the maximum amount of time you will do simulations for
296 // one frame to display. The cpu time spent in simulations code is roughly
297 // at least O(real_delta_time_sec). If this is (due to running debug
298 // builds or valgrind or something different blowing up execution times)
299 // larger than the real time you will no longer get any response
300 // from flightgear. This limits that effect. Just set to property from
301 // your .fgfsrc or commandline ...
302 double dtMax = max_simtime_per_frame->getDoubleValue();
303 if (0 < dtMax && dtMax < real_delta_time_sec)
304 real_delta_time_sec = dtMax;
306 // round the real time down to a multiple of 1/model-hz.
307 // this way all systems are updated the _same_ amount of dt.
309 static double rem = 0.0;
310 real_delta_time_sec += rem;
311 double hz = model_hz;
312 double nit = floor(real_delta_time_sec*hz);
313 rem = real_delta_time_sec - nit/hz;
314 real_delta_time_sec = nit/hz;
318 if (clock_freeze->getBoolValue() || wait_for_scenery) {
321 delta_time_sec = real_delta_time_sec;
323 last_time_stamp = current_time_stamp;
324 globals->inc_sim_time_sec( delta_time_sec );
326 // These are useful, especially for Nasal scripts.
327 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
328 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
330 static long remainder = 0;
332 #ifdef FANCY_FRAME_COUNTER
336 static time_t last_time = 0;
337 static int frames = 0;
338 #endif // FANCY_FRAME_COUNTER
340 SGTime *t = globals->get_time_params();
342 globals->get_event_mgr()->update(delta_time_sec);
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 // Do any I/O channel work that might need to be done
494 globals->get_io()->update( real_delta_time_sec );
496 // see if we need to load any deferred-load textures
497 globals->get_matlib()->load_next_deferred();
499 // Run audio scheduler
500 #ifdef ENABLE_AUDIO_SUPPORT
501 if ( globals->get_soundmgr()->is_working() ) {
502 globals->get_soundmgr()->update( delta_time_sec );
506 globals->get_subsystem_mgr()->update(delta_time_sec);
509 // Tile Manager updates - see if we need to load any new scenery tiles.
510 // this code ties together the fdm, viewer and scenery classes...
511 // we may want to move this to its own class at some point
513 double visibility_meters = fgGetDouble("/environment/visibility-m");
514 FGViewer *current_view = globals->get_current_view();
516 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
517 // update tile manager for view...
518 SGLocation *view_location = globals->get_current_view()->getSGLocation();
519 globals->get_tile_mgr()->update( view_location, visibility_meters );
521 double lon = view_location->getLongitude_deg();
522 double lat = view_location->getLatitude_deg();
523 double alt = view_location->getAltitudeASL_ft() * SG_FEET_TO_METER;
525 // check if we can reuse the groundcache for that purpose.
528 bool valid = cur_fdm_state->is_valid_m(&ref_time, pt.sg(), &r);
529 SGVec3d viewpos(globals->get_current_view()->get_view_pos());
530 if (valid && distSqr(viewpos, pt) < r*r) {
531 // Reuse the cache ...
533 = cur_fdm_state->get_groundlevel_m(lat*SGD_DEGREES_TO_RADIANS,
534 lon*SGD_DEGREES_TO_RADIANS,
536 view_location->set_cur_elev_m( lev );
538 // Do full intersection test.
540 if (globals->get_scenery()->get_elevation_m(lat, lon, alt+2, lev, 0))
541 view_location->set_cur_elev_m( lev );
543 view_location->set_cur_elev_m( -9999.0 );
547 #ifdef ENABLE_AUDIO_SUPPORT
548 // Right now we make a simplifying assumption that the primary
549 // aircraft is the source of all sounds and that all sounds are
550 // positioned in the aircraft base
552 static sgVec3 last_pos_offset = {0, 0, 0};
554 //get the orientation
555 const SGQuatd view_or = current_view->getViewOrientation();
556 SGQuatd surf_or = SGQuatd::fromLonLatDeg(
557 current_view->getLongitude_deg(), current_view->getLatitude_deg());
558 SGQuatd model_or = SGQuatd::fromYawPitchRollDeg(
559 globals->get_aircraft_model()->get3DModel()->getHeadingDeg(),
560 globals->get_aircraft_model()->get3DModel()->getPitchDeg(),
561 globals->get_aircraft_model()->get3DModel()->getRollDeg());
563 //get the up and at vector in the aircraft base
564 SGVec3d sgv_up = model_or.rotateBack(
565 surf_or.rotateBack(view_or.rotate(SGVec3d(0, -1, 0))));
567 sgSetVec3(up, sgv_up[0], sgv_up[1], sgv_up[2]);
568 SGVec3d sgv_at = model_or.rotateBack(
569 surf_or.rotateBack(view_or.rotate(SGVec3d(0, 0, 1))));
571 sgSetVec3(at, sgv_at[0], sgv_at[1], sgv_at[2]);
573 // get the location data for the primary FDM (now hardcoded to ac model)...
574 SGLocation *acmodel_loc = NULL;
575 acmodel_loc = (SGLocation *)globals->
576 get_aircraft_model()->get3DModel()->getSGLocation();
578 // set positional offset for sources
579 sgdVec3 dsource_pos_offset;
580 sgdSubVec3( dsource_pos_offset,
581 (double*) ¤t_view->get_view_pos(),
582 acmodel_loc->get_absolute_view_pos() );
583 SGVec3d sgv_dsource_pos_offset = model_or.rotateBack(
584 surf_or.rotateBack(SGVec3d(dsource_pos_offset[0],
585 dsource_pos_offset[1], dsource_pos_offset[2])));
587 //sgv_dsource_pos_offset = model_or.rotateBack(sgv_dsource_pos_offset);
588 sgVec3 source_pos_offset;
589 sgSetVec3(source_pos_offset, sgv_dsource_pos_offset[0],
590 sgv_dsource_pos_offset[1], sgv_dsource_pos_offset[2]);
592 globals->get_soundmgr()->set_source_pos_all( source_pos_offset );
595 for (int i = 0; i < 3; i++) {
596 orient[i] = sgv_at[i];
597 orient[i + 3] = sgv_up[i];
599 globals->get_soundmgr()->set_listener_orientation( orient );
603 sgSubVec3( source_vel, source_pos_offset, last_pos_offset );
604 if (delta_time_sec > 0)
605 sgScaleVec3( source_vel, 1 / delta_time_sec );
606 sgCopyVec3( last_pos_offset, source_pos_offset );
607 // cout << "vel = " << source_vel[0] << " " << source_vel[1] << " " << source_vel[2] << endl;
608 globals->get_soundmgr()->set_source_vel_all( source_vel );
610 // The listener is always positioned at the origin.
612 sgSetVec3( listener_pos, 0.0, 0.0, 0.0 );
613 globals->get_soundmgr()->set_listener_pos( listener_pos );
616 // END Tile Manager udpates
618 if (!scenery_loaded && globals->get_tile_mgr()->all_queues_empty() && cur_fdm_state->get_inited()) {
619 fgSetBool("sim/sceneryloaded",true);
620 fgSetFloat("/sim/sound/volume", init_volume);
621 globals->get_soundmgr()->set_volume(init_volume);
626 SG_LOG( SG_ALL, SG_DEBUG, "" );
630 // This is the top level master main function that is registered as
633 // The first few passes take care of initialization things (a couple
634 // per pass) and once everything has been initialized fgMainLoop from
637 static void fgIdleFunction ( void ) {
638 // Some intialization requires a valid graphics context, in
639 // particular that of plib. Boo, hiss!
641 if ( idle_state == 0 ) {
644 // This seems to be the absolute earliest in the init sequence
645 // that these calls will return valid info. Too bad it's after
646 // we've already created and sized our window. :-(
647 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
648 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
649 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
650 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
653 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
654 general.set_glMaxTexSize( tmp );
655 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
657 glGetIntegerv( GL_DEPTH_BITS, &tmp );
658 general.set_glDepthBits( tmp );
659 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
661 // Initialize the user interface so that we can use fonts
665 } else if ( idle_state == 1 ) {
667 fgSplashProgress("reading aircraft list");
670 } else if ( idle_state == 2 ) {
672 // Read the list of available aircraft
675 // get the address of our OpenGL extensions
676 // if (SGIsOpenGLExtensionSupported("GL_EXT_point_parameters") ) {
677 // glPointParameterIsSupported = true;
678 // glPointParameterfPtr = (glPointParameterfProc)
679 // SGLookupFunction("glPointParameterfEXT");
680 // glPointParameterfvPtr = (glPointParameterfvProc)
681 // SGLookupFunction("glPointParameterfvEXT");
682 // } else if ( SGIsOpenGLExtensionSupported("GL_ARB_point_parameters") ) {
683 // glPointParameterIsSupported = true;
684 // glPointParameterfPtr = (glPointParameterfProc)
685 // SGLookupFunction("glPointParameterfARB");
686 // glPointParameterfvPtr = (glPointParameterfvProc)
687 // SGLookupFunction("glPointParameterfvARB");
689 // glPointParameterIsSupported = false;
691 fgSplashProgress("reading airport & navigation data");
694 } else if ( idle_state == 3 ) {
697 fgSplashProgress("setting up scenery");
700 } else if ( idle_state == 4 ) {
702 // based on the requested presets, calculate the true starting
705 fgInitTowerLocationListener();
707 SGTime *t = fgInitTime();
708 globals->set_time_params( t );
710 // Do some quick general initializations
711 if( !fgInitGeneral()) {
712 SG_LOG( SG_GENERAL, SG_ALERT,
713 "General initialization failed ..." );
717 ////////////////////////////////////////////////////////////////////
718 // Initialize the property-based built-in commands
719 ////////////////////////////////////////////////////////////////////
723 ////////////////////////////////////////////////////////////////////
724 // Initialize the material manager
725 ////////////////////////////////////////////////////////////////////
726 globals->set_matlib( new SGMaterialLib );
727 globals->set_model_lib(new SGModelLib);
730 ////////////////////////////////////////////////////////////////////
731 // Initialize the TG scenery subsystem.
732 ////////////////////////////////////////////////////////////////////
733 globals->set_scenery( new FGScenery );
734 globals->get_scenery()->init();
735 globals->get_scenery()->bind();
736 globals->set_tile_mgr( new FGTileMgr );
739 ////////////////////////////////////////////////////////////////////
740 // Initialize the general model subsystem.
741 ////////////////////////////////////////////////////////////////////
742 globals->set_model_mgr(new FGModelMgr);
743 globals->get_model_mgr()->init();
744 globals->get_model_mgr()->bind();
745 fgSplashProgress("loading aircraft");
748 } else if ( idle_state == 5 ) {
750 ////////////////////////////////////////////////////////////////////
751 // Initialize the 3D aircraft model subsystem (has a dependency on
752 // the scenery subsystem.)
753 ////////////////////////////////////////////////////////////////////
754 globals->set_aircraft_model(new FGAircraftModel);
755 globals->get_aircraft_model()->init();
756 globals->get_aircraft_model()->bind();
758 ////////////////////////////////////////////////////////////////////
759 // Initialize the view manager subsystem.
760 ////////////////////////////////////////////////////////////////////
761 FGViewMgr *viewmgr = new FGViewMgr;
762 globals->set_viewmgr( viewmgr );
765 fgSplashProgress("generating sky elements");
768 } else if ( idle_state == 6 ) {
770 // Initialize the sky
771 SGPath ephem_data_path( globals->get_fg_root() );
772 ephem_data_path.append( "Astro" );
773 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
774 ephem->update( globals->get_time_params()->getMjd(),
775 globals->get_time_params()->getLst(),
777 globals->set_ephem( ephem );
779 // TODO: move to environment mgr
781 SGPath texture_path(globals->get_fg_root());
782 texture_path.append("Textures");
783 texture_path.append("Sky");
784 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
785 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
786 thesky->add_cloud_layer(layer);
789 SGPath sky_tex_path( globals->get_fg_root() );
790 sky_tex_path.append( "Textures" );
791 sky_tex_path.append( "Sky" );
792 thesky->texture_path( sky_tex_path.str() );
794 // The sun and moon diameters are scaled down numbers of the
795 // actual diameters. This was needed to fit both the sun and the
796 // moon within the distance to the far clip plane.
797 // Moon diameter: 3,476 kilometers
798 // Sun diameter: 1,390,000 kilometers
799 thesky->build( 80000.0, 80000.0,
801 globals->get_ephem()->getNumPlanets(),
802 globals->get_ephem()->getPlanets(),
803 globals->get_ephem()->getNumStars(),
804 globals->get_ephem()->getStars(),
805 fgGetNode("/environment", true));
807 // Initialize MagVar model
808 SGMagVar *magvar = new SGMagVar();
809 globals->set_mag( magvar );
812 // kludge to initialize mag compass
813 // (should only be done for in-flight
815 // update magvar model
816 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
817 * SGD_DEGREES_TO_RADIANS,
818 fgGetDouble("/position/latitude-deg")
819 * SGD_DEGREES_TO_RADIANS,
820 fgGetDouble("/position/altitude-ft")
822 globals->get_time_params()->getJD() );
823 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
824 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
825 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
828 // airport = new ssgBranch;
829 // airport->setName( "Airport Lighting" );
830 // lighting->addKid( airport );
832 // build our custom render states
833 fgSplashProgress("initializing subsystems");
836 } else if ( idle_state == 7 ) {
838 // Initialize audio support
839 #ifdef ENABLE_AUDIO_SUPPORT
841 // Start the intro music
842 if ( fgGetBool("/sim/startup/intro-music") ) {
843 SGPath mp3file( globals->get_fg_root() );
844 mp3file.append( "Sounds/intro.mp3" );
846 SG_LOG( SG_GENERAL, SG_INFO,
847 "Starting intro music: " << mp3file.str() );
849 #if defined( __CYGWIN__ )
850 string command = "start /m `cygpath -w " + mp3file.str() + "`";
851 #elif defined( WIN32 )
852 string command = "start /m " + mp3file.str();
854 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
857 system ( command.c_str() );
861 // These are a few miscellaneous things that aren't really
862 // "subsystems" but still need to be initialized.
865 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
866 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
870 // This is the top level init routine which calls all the
871 // other subsystem initialization routines. If you are adding
872 // a subsystem to flightgear, its initialization call should be
873 // located in this routine.
874 if( !fgInitSubsystems()) {
875 SG_LOG( SG_GENERAL, SG_ALERT,
876 "Subsystem initialization failed ..." );
879 fgSplashProgress("setting up time & renderer");
882 } else if ( idle_state == 8 ) {
884 // Initialize the time offset (warp) after fgInitSubsystem
885 // (which initializes the lighting interpolation tables.)
888 // setup OpenGL view parameters
889 globals->get_renderer()->init();
891 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
892 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
893 fgGetInt("/sim/startup/ysize") );
895 fgSplashProgress("loading scenery objects");
899 if ( idle_state == 1000 ) {
900 // We've finished all our initialization steps, from now on we
901 // run the main loop.
902 fgSetBool("sim/sceneryloaded", false);
903 fgRegisterIdleHandler( fgMainLoop );
908 static void upper_case_property(const char *name)
910 SGPropertyNode *p = fgGetNode(name, false);
912 p = fgGetNode(name, true);
913 p->setStringValue("");
915 SGPropertyNode::Type t = p->getType();
916 if (t == SGPropertyNode::NONE || t == SGPropertyNode::UNSPECIFIED)
917 p->setStringValue("");
919 assert(t == SGPropertyNode::STRING);
921 p->addChangeListener(new FGMakeUpperCase);
925 // Main top level initialization
926 bool fgMainInit( int argc, char **argv ) {
928 #if defined( macintosh )
929 freopen ("stdout.txt", "w", stdout );
930 freopen ("stderr.txt", "w", stderr );
931 argc = ccommand( &argv );
934 // set default log levels
935 sglog().setLogLevels( SG_ALL, SG_ALERT );
938 #ifdef FLIGHTGEAR_VERSION
939 version = FLIGHTGEAR_VERSION;
941 version = "unknown version";
943 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
945 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
947 // Allocate global data structures. This needs to happen before
948 // we parse command line options
950 globals = new FGGlobals;
952 // seed the random number generator
955 FGControls *controls = new FGControls;
956 globals->set_controls( controls );
958 string_list *col = new string_list;
959 globals->set_channel_options_list( col );
961 upper_case_property("/sim/presets/airport-id");
962 upper_case_property("/sim/presets/runway");
963 upper_case_property("/sim/tower/airport-id");
965 // Scan the config file(s) and command line options to see if
966 // fg_root was specified (ignore all other options for now)
967 fgInitFGRoot(argc, argv);
969 // Check for the correct base package version
970 static char required_version[] = "0.9.11";
971 string base_version = fgBasePackageVersion();
972 if ( !(base_version == required_version) ) {
973 // tell the operator how to use this application
975 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
976 cerr << endl << "Base package check failed ... " \
977 << "Found version " << base_version << " at: " \
978 << globals->get_fg_root() << endl;
979 cerr << "Please upgrade to version: " << required_version << endl;
981 cerr << "Hit a key to continue..." << endl;
987 // Load the configuration parameters. (Command line options
988 // override config file options. Config file options override
990 if ( !fgInitConfig(argc, argv) ) {
991 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
995 // Initialize the Window/Graphics environment.
996 #if !defined(__APPLE__) || defined(OSX_BUNDLE)
997 // Mac OS X command line ("non-bundle") applications call this
998 // from main(), in bootstrap.cxx. Andy doesn't know why, someone
999 // feel free to add comments...
1000 fgOSInit(&argc, argv);
1001 _bootstrap_OSInit++;
1004 fgRegisterWindowResizeHandler( &FGRenderer::resize );
1005 fgRegisterIdleHandler( &fgIdleFunction );
1006 fgRegisterDrawHandler( &FGRenderer::update );
1008 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
1009 bool get_stencil_buffer = true;
1011 bool get_stencil_buffer = false;
1014 // Initialize plib net interface
1015 netInit( &argc, argv );
1017 // Clouds3D requires an alpha channel
1018 // clouds may require stencil buffer
1019 fgOSOpenWindow( fgGetInt("/sim/startup/xsize"),
1020 fgGetInt("/sim/startup/ysize"),
1021 fgGetInt("/sim/rendering/bits-per-pixel"),
1022 fgGetBool("/sim/rendering/clouds3d-enable"),
1024 fgGetBool("/sim/startup/fullscreen") );
1026 // Initialize the splash screen right away
1030 // pass control off to the master event handler
1033 // we never actually get here ... but to avoid compiler warnings,