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 ...
155 if ( replay_state->getIntValue() == 0 ) {
156 // replay off, run fdm
157 cur_fdm_state->update( delta_time_sec );
159 FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
160 r->replay( replay_time->getDoubleValue() );
161 if ( replay_state->getIntValue() == 1 ) {
163 replay_time->setDoubleValue( replay_time->getDoubleValue()
165 * fgGetInt("/sim/speed-up") ) );
166 } else if ( replay_state->getIntValue() == 2 ) {
167 // paused playback (don't advance replay time)
173 fgSetBool("/sim/signals/fdm-initialized", true);
177 // do nothing, fdm isn't inited yet
180 globals->get_model_mgr()->update(delta_time_sec);
181 globals->get_aircraft_model()->update(delta_time_sec);
183 // Update solar system
184 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
185 globals->get_time_params()->getLst(),
186 cur_fdm_state->get_Latitude() );
191 void fgInitTimeDepCalcs( void ) {
196 static const double alt_adjust_ft = 3.758099;
197 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
200 // What should we do when we have nothing else to do? Let's get ready
201 // for the next move and update the display?
202 static void fgMainLoop( void ) {
203 int model_hz = fgGetInt("/sim/model-hz");
205 static SGConstPropertyNode_ptr longitude
206 = fgGetNode("/position/longitude-deg");
207 static SGConstPropertyNode_ptr latitude
208 = fgGetNode("/position/latitude-deg");
209 static SGConstPropertyNode_ptr altitude
210 = fgGetNode("/position/altitude-ft");
211 static SGConstPropertyNode_ptr clock_freeze
212 = fgGetNode("/sim/freeze/clock", true);
213 static SGConstPropertyNode_ptr cur_time_override
214 = fgGetNode("/sim/time/cur-time-override", true);
215 static SGConstPropertyNode_ptr max_simtime_per_frame
216 = fgGetNode("/sim/max-simtime-per-frame", true);
217 static SGPropertyNode_ptr frame_signal
218 = fgGetNode("/sim/signals/frame", true);
220 frame_signal->setBoolValue(true);
221 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
223 bool scenery_loaded = fgGetBool("sim/sceneryloaded");
224 bool wait_for_scenery = !(scenery_loaded || fgGetBool("sim/sceneryloaded-override"));
226 // Update the elapsed time.
227 static bool first_time = true;
229 last_time_stamp.stamp();
233 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
234 if ( throttle_hz > 0.0 && !wait_for_scenery ) {
235 // optionally throttle the frame rate (to get consistent frame
236 // rates or reduce cpu usage.
238 double frame_us = 1000000.0 / throttle_hz;
240 #define FG_SLEEP_BASED_TIMING 1
241 #if defined(FG_SLEEP_BASED_TIMING)
242 // sleep based timing loop.
244 // Calling sleep, even usleep() on linux is less accurate than
245 // we like, but it does free up the cpu for other tasks during
246 // the sleep so it is desirable. Because of the way sleep()
247 // is implemented in consumer operating systems like windows
248 // and linux, you almost always sleep a little longer than the
251 // To combat the problem of sleeping too long, we calculate the
252 // desired wait time and shorten it by 2000us (2ms) to avoid
253 // [hopefully] over-sleep'ing. The 2ms value was arrived at
254 // via experimentation. We follow this up at the end with a
255 // simple busy-wait loop to get the final pause timing exactly
258 // Assuming we don't oversleep by more than 2000us, this
259 // should be a reasonable compromise between sleep based
260 // waiting, and busy waiting.
262 // sleep() will always overshoot by a bit so undersleep by
263 // 2000us in the hopes of never oversleeping.
265 if ( frame_us < 0.0 ) {
268 current_time_stamp.stamp();
270 double elapsed_us = current_time_stamp - last_time_stamp;
271 if ( elapsed_us < frame_us ) {
272 double requested_us = frame_us - elapsed_us;
273 ulMilliSecondSleep ( (int)(requested_us / 1000.0) ) ;
277 // busy wait timing loop.
279 // This yields the most accurate timing. If the previous
280 // ulMilliSecondSleep() call is omitted this will peg the cpu
281 // (which is just fine if FG is the only app you care about.)
282 current_time_stamp.stamp();
283 while ( current_time_stamp - last_time_stamp < frame_us ) {
284 current_time_stamp.stamp();
287 // run as fast as the app will go
288 current_time_stamp.stamp();
292 = double(current_time_stamp - last_time_stamp) / 1000000.0;
294 // Limit the time we need to spend in simulation loops
295 // That means, if the /sim/max-simtime-per-frame value is strictly positive
296 // you can limit the maximum amount of time you will do simulations for
297 // one frame to display. The cpu time spent in simulations code is roughly
298 // at least O(real_delta_time_sec). If this is (due to running debug
299 // builds or valgrind or something different blowing up execution times)
300 // larger than the real time you will no longer get any response
301 // from flightgear. This limits that effect. Just set to property from
302 // your .fgfsrc or commandline ...
303 double dtMax = max_simtime_per_frame->getDoubleValue();
304 if (0 < dtMax && dtMax < real_delta_time_sec)
305 real_delta_time_sec = dtMax;
307 // round the real time down to a multiple of 1/model-hz.
308 // this way all systems are updated the _same_ amount of dt.
310 static double rem = 0.0;
311 real_delta_time_sec += rem;
312 double hz = model_hz;
313 double nit = floor(real_delta_time_sec*hz);
314 rem = real_delta_time_sec - nit/hz;
315 real_delta_time_sec = nit/hz;
319 if (clock_freeze->getBoolValue() || wait_for_scenery) {
322 delta_time_sec = real_delta_time_sec;
324 last_time_stamp = current_time_stamp;
325 globals->inc_sim_time_sec( delta_time_sec );
327 // These are useful, especially for Nasal scripts.
328 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
329 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
331 static long remainder = 0;
333 #ifdef FANCY_FRAME_COUNTER
337 static time_t last_time = 0;
338 static int frames = 0;
339 #endif // FANCY_FRAME_COUNTER
341 SGTime *t = globals->get_time_params();
343 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
344 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
346 #if defined( ENABLE_PLIB_JOYSTICK )
347 // Read joystick and update control settings
348 // if ( fgGetString("/sim/control-mode") == "joystick" )
354 // Fix elevation. I'm just sticking this here for now, it should
355 // probably move eventually
357 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
358 scenery.get_cur_elev(),
359 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
360 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
362 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
363 scenery.get_cur_elev(),
364 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
365 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
367 // cout << "Warp = " << globals->get_warp() << endl;
370 static bool last_clock_freeze = false;
372 if ( clock_freeze->getBoolValue() ) {
373 // clock freeze requested
374 if ( cur_time_override->getLongValue() == 0 ) {
375 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
376 globals->set_warp( 0 );
379 // no clock freeze requested
380 if ( last_clock_freeze == true ) {
381 // clock just unfroze, let's set warp as the difference
382 // between frozen time and current time so we don't get a
383 // time jump (and corresponding sky object and lighting
385 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
386 fgSetLong( "/sim/time/cur-time-override", 0 );
388 if ( globals->get_warp_delta() != 0 ) {
389 globals->inc_warp( globals->get_warp_delta() );
393 last_clock_freeze = clock_freeze->getBoolValue();
395 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
396 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
397 cur_time_override->getLongValue(),
398 globals->get_warp() );
400 if (globals->get_warp_delta() != 0) {
401 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
405 // update magvar model
406 globals->get_mag()->update( longitude->getDoubleValue()
407 * SGD_DEGREES_TO_RADIANS,
408 latitude->getDoubleValue()
409 * SGD_DEGREES_TO_RADIANS,
410 altitude->getDoubleValue() * SG_FEET_TO_METER,
411 globals->get_time_params()->getJD() );
413 // Get elapsed time (in usec) for this past frame
414 elapsed = fgGetTimeInterval();
415 SG_LOG( SG_ALL, SG_DEBUG,
416 "Elapsed time interval is = " << elapsed
417 << ", previous remainder is = " << remainder );
419 // Calculate frame rate average
420 #ifdef FANCY_FRAME_COUNTER
421 /* old fps calculation */
425 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
426 tmp = general.get_frame(i);
428 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
429 general.set_frame(i+1,tmp);
431 tmp = 1000000.0 / (float)elapsed;
432 general.set_frame(0,tmp);
433 // printf("frame[0] = %.2f\n", general.frames[0]);
435 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
436 // printf("ave = %.2f\n", general.frame_rate);
439 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
440 general.set_frame_rate( frames );
441 fgSetInt("/sim/frame-rate", frames);
442 SG_LOG( SG_ALL, SG_DEBUG,
443 "--> Frame rate is = " << general.get_frame_rate() );
446 last_time = t->get_cur_time();
450 // Update any multiplayer's network queues, the AIMultiplayer
451 // implementation is an AI model and depends on that
452 globals->get_multiplayer_mgr()->Update();
455 if (fgGetBool("/sim/atc/enabled"))
456 globals->get_ATC_mgr()->update(delta_time_sec);
458 // Run the AI subsystem
459 // FIXME: run that also if we have multiplaying enabled since the
460 // multiplayer information is interpreted by an AI model
461 if (fgGetBool("/sim/ai-traffic/enabled"))
462 globals->get_AI_mgr()->update(delta_time_sec);
466 // Calculate model iterations needed for next frame
467 elapsed += remainder;
469 global_multi_loop = (long)(((double)elapsed * 0.000001) * model_hz );
470 remainder = elapsed - ( (global_multi_loop*1000000) / model_hz );
471 SG_LOG( SG_ALL, SG_DEBUG,
472 "Model iterations needed = " << global_multi_loop
473 << ", new remainder = " << remainder );
475 // chop max iterations to something reasonable if the sim was
476 // delayed for an excessive amount of time
477 if ( global_multi_loop > 2.0 * model_hz ) {
478 global_multi_loop = (int)(2.0 * model_hz );
483 if ( global_multi_loop > 0) {
484 // first run the flight model each frame until it is initialized
485 // then continue running each frame only after initial scenery load is complete.
486 fgUpdateTimeDepCalcs();
488 SG_LOG( SG_ALL, SG_DEBUG,
489 "Elapsed time is zero ... we're zinging" );
492 // Do any I/O channel work that might need to be done
493 globals->get_io()->update( real_delta_time_sec );
495 // Run audio scheduler
496 #ifdef ENABLE_AUDIO_SUPPORT
497 if ( globals->get_soundmgr()->is_working() ) {
498 globals->get_soundmgr()->update( delta_time_sec );
502 globals->get_subsystem_mgr()->update(delta_time_sec);
505 // Tile Manager updates - see if we need to load any new scenery tiles.
506 // this code ties together the fdm, viewer and scenery classes...
507 // we may want to move this to its own class at some point
509 double visibility_meters = fgGetDouble("/environment/visibility-m");
510 FGViewer *current_view = globals->get_current_view();
512 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
513 // update tile manager for view...
514 SGLocation *view_location = globals->get_current_view()->getSGLocation();
515 globals->get_tile_mgr()->update( view_location, visibility_meters );
517 double lon = view_location->getLongitude_deg();
518 double lat = view_location->getLatitude_deg();
519 double alt = view_location->getAltitudeASL_ft() * SG_FEET_TO_METER;
521 // check if we can reuse the groundcache for that purpose.
524 bool valid = cur_fdm_state->is_valid_m(&ref_time, pt.sg(), &r);
525 SGVec3d viewpos(globals->get_current_view()->get_view_pos());
526 if (valid && distSqr(viewpos, pt) < r*r) {
527 // Reuse the cache ...
529 = cur_fdm_state->get_groundlevel_m(lat*SGD_DEGREES_TO_RADIANS,
530 lon*SGD_DEGREES_TO_RADIANS,
532 view_location->set_cur_elev_m( lev );
534 // Do full intersection test.
536 if (globals->get_scenery()->get_elevation_m(lat, lon, alt+2, lev, 0))
537 view_location->set_cur_elev_m( lev );
539 view_location->set_cur_elev_m( -9999.0 );
543 // run Nasal's settimer() loops right before the view manager
544 globals->get_event_mgr()->update(delta_time_sec);
546 // update the view angle as late as possible, but before sound calculations
547 globals->get_viewmgr()->update(delta_time_sec);
549 #ifdef ENABLE_AUDIO_SUPPORT
550 // Right now we make a simplifying assumption that the primary
551 // aircraft is the source of all sounds and that all sounds are
552 // positioned in the aircraft base
554 static sgdVec3 last_visitor_pos = {0, 0, 0};
555 static sgdVec3 last_model_pos = {0, 0, 0};
557 // get the orientation
558 const SGQuatd view_or = current_view->getViewOrientation();
559 SGQuatd surf_or = SGQuatd::fromLonLatDeg(
560 current_view->getLongitude_deg(), current_view->getLatitude_deg());
561 SGQuatd model_or = SGQuatd::fromYawPitchRollDeg(
562 globals->get_aircraft_model()->get3DModel()->getHeadingDeg(),
563 globals->get_aircraft_model()->get3DModel()->getPitchDeg(),
564 globals->get_aircraft_model()->get3DModel()->getRollDeg());
566 // get the up and at vector in the aircraft base
567 // (ok, the up vector is a down vector, but the coordinates
568 // are finally calculated in a left hand system and openal
569 // lives in a right hand system. Therefore we need to pass
570 // the down vector to get correct stereo sound.)
571 SGVec3d sgv_up = model_or.rotateBack(
572 surf_or.rotateBack(view_or.rotate(SGVec3d(0, 1, 0))));
574 sgSetVec3(up, sgv_up[0], sgv_up[1], sgv_up[2]);
575 SGVec3d sgv_at = model_or.rotateBack(
576 surf_or.rotateBack(view_or.rotate(SGVec3d(0, 0, 1))));
578 sgSetVec3(at, sgv_at[0], sgv_at[1], sgv_at[2]);
580 // get the location data for the primary FDM (now hardcoded to ac model)...
581 SGLocation *acmodel_loc = NULL;
582 acmodel_loc = (SGLocation *)globals->
583 get_aircraft_model()->get3DModel()->getSGLocation();
585 // calculate speed of visitor and model
586 sgVec3 listener_vel, model_vel;
589 sgdVec3 sgdv3_null = {0, 0, 0};
591 sgdSubVec3( sgdv3_help,
592 last_visitor_pos, (double *)¤t_view->get_view_pos());
593 sgdAddVec3( last_visitor_pos, sgdv3_null, (double *)¤t_view->get_view_pos());
594 SGV3d_help = model_or.rotateBack(
595 surf_or.rotateBack(SGVec3d(sgdv3_help[0],
596 sgdv3_help[1], sgdv3_help[2])));
597 sgSetVec3( listener_vel, SGV3d_help[0], SGV3d_help[1], SGV3d_help[2]);
599 sgdSubVec3( sgdv3_help,
600 last_model_pos, acmodel_loc->get_absolute_view_pos());
601 sgdAddVec3( last_model_pos, sgdv3_null, acmodel_loc->get_absolute_view_pos());
602 SGV3d_help = model_or.rotateBack(
603 surf_or.rotateBack(SGVec3d(sgdv3_help[0],
604 sgdv3_help[1], sgdv3_help[2])));
605 sgSetVec3( model_vel, SGV3d_help[0], SGV3d_help[1], SGV3d_help[2]);
607 if (delta_time_sec > 0) {
608 sgScaleVec3( model_vel, 1 / delta_time_sec );
609 sgScaleVec3( listener_vel, 1 / delta_time_sec );
612 // checking, if the listener pos has moved suddenly
613 if (sgLengthVec3(listener_vel) > 1000)
615 // check if the relative speed model vs listener has moved suddenly, too
617 sgSubVec3(delta_vel, listener_vel, model_vel );
618 if (sgLengthVec3(delta_vel) > 1000)
619 sgSetVec3(listener_vel, model_vel[0], model_vel[1], model_vel[2] ); // a sane value
621 globals->get_soundmgr()->set_listener_vel( listener_vel );
624 globals->get_soundmgr()->set_listener_vel( listener_vel );
626 // set positional offset for sources
627 sgdVec3 dsource_pos_offset;
628 sgdSubVec3( dsource_pos_offset,
629 (double*) ¤t_view->get_view_pos(),
630 acmodel_loc->get_absolute_view_pos() );
631 SGVec3d sgv_dsource_pos_offset = model_or.rotateBack(
632 surf_or.rotateBack(SGVec3d(dsource_pos_offset[0],
633 dsource_pos_offset[1], dsource_pos_offset[2])));
635 sgVec3 source_pos_offset;
636 sgSetVec3(source_pos_offset, sgv_dsource_pos_offset[0],
637 sgv_dsource_pos_offset[1], sgv_dsource_pos_offset[2]);
639 globals->get_soundmgr()->set_source_pos_all( source_pos_offset );
642 for (int i = 0; i < 3; i++) {
643 orient[i] = sgv_at[i];
644 orient[i + 3] = sgv_up[i];
646 globals->get_soundmgr()->set_listener_orientation( orient );
649 // all sources are defined to be in the model
650 globals->get_soundmgr()->set_source_vel_all( model_vel );
652 // The listener is always positioned at the origin.
654 sgSetVec3( listener_pos, 0.0, 0.0, 0.0 );
655 globals->get_soundmgr()->set_listener_pos( listener_pos );
658 // END Tile Manager udpates
660 if (!scenery_loaded && globals->get_tile_mgr()->isSceneryLoaded()
661 && cur_fdm_state->get_inited()) {
662 fgSetBool("sim/sceneryloaded",true);
663 fgSetFloat("/sim/sound/volume", init_volume);
664 globals->get_soundmgr()->set_volume(init_volume);
669 SG_LOG( SG_ALL, SG_DEBUG, "" );
673 // This is the top level master main function that is registered as
676 // The first few passes take care of initialization things (a couple
677 // per pass) and once everything has been initialized fgMainLoop from
680 static void fgIdleFunction ( void ) {
681 // Some intialization requires a valid graphics context, in
682 // particular that of plib. Boo, hiss!
684 if ( idle_state == 0 ) {
687 // This seems to be the absolute earliest in the init sequence
688 // that these calls will return valid info. Too bad it's after
689 // we've already created and sized our window. :-(
690 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
691 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
692 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
693 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
696 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
697 general.set_glMaxTexSize( tmp );
698 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
700 glGetIntegerv( GL_DEPTH_BITS, &tmp );
701 general.set_glDepthBits( tmp );
702 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
704 // Initialize the user interface so that we can use fonts
708 } else if ( idle_state == 1 ) {
710 fgSplashProgress("reading aircraft list");
713 } else if ( idle_state == 2 ) {
715 // Read the list of available aircraft
718 // get the address of our OpenGL extensions
719 // if (SGIsOpenGLExtensionSupported("GL_EXT_point_parameters") ) {
720 // glPointParameterIsSupported = true;
721 // glPointParameterfPtr = (glPointParameterfProc)
722 // SGLookupFunction("glPointParameterfEXT");
723 // glPointParameterfvPtr = (glPointParameterfvProc)
724 // SGLookupFunction("glPointParameterfvEXT");
725 // } else if ( SGIsOpenGLExtensionSupported("GL_ARB_point_parameters") ) {
726 // glPointParameterIsSupported = true;
727 // glPointParameterfPtr = (glPointParameterfProc)
728 // SGLookupFunction("glPointParameterfARB");
729 // glPointParameterfvPtr = (glPointParameterfvProc)
730 // SGLookupFunction("glPointParameterfvARB");
732 // glPointParameterIsSupported = false;
734 fgSplashProgress("reading airport & navigation data");
737 } else if ( idle_state == 3 ) {
740 fgSplashProgress("setting up scenery");
743 } else if ( idle_state == 4 ) {
745 // based on the requested presets, calculate the true starting
748 fgInitTowerLocationListener();
750 SGTime *t = fgInitTime();
751 globals->set_time_params( t );
753 // Do some quick general initializations
754 if( !fgInitGeneral()) {
755 SG_LOG( SG_GENERAL, SG_ALERT,
756 "General initialization failed ..." );
760 ////////////////////////////////////////////////////////////////////
761 // Initialize the property-based built-in commands
762 ////////////////////////////////////////////////////////////////////
766 ////////////////////////////////////////////////////////////////////
767 // Initialize the material manager
768 ////////////////////////////////////////////////////////////////////
769 globals->set_matlib( new SGMaterialLib );
770 globals->set_model_lib(new SGModelLib);
773 ////////////////////////////////////////////////////////////////////
774 // Initialize the TG scenery subsystem.
775 ////////////////////////////////////////////////////////////////////
776 globals->set_scenery( new FGScenery );
777 globals->get_scenery()->init();
778 globals->get_scenery()->bind();
779 globals->set_tile_mgr( new FGTileMgr );
782 ////////////////////////////////////////////////////////////////////
783 // Initialize the general model subsystem.
784 ////////////////////////////////////////////////////////////////////
785 globals->set_model_mgr(new FGModelMgr);
786 globals->get_model_mgr()->init();
787 globals->get_model_mgr()->bind();
788 fgSplashProgress("loading aircraft");
791 } else if ( idle_state == 5 ) {
793 ////////////////////////////////////////////////////////////////////
794 // Initialize the 3D aircraft model subsystem (has a dependency on
795 // the scenery subsystem.)
796 ////////////////////////////////////////////////////////////////////
797 globals->set_aircraft_model(new FGAircraftModel);
798 globals->get_aircraft_model()->init();
799 globals->get_aircraft_model()->bind();
801 ////////////////////////////////////////////////////////////////////
802 // Initialize the view manager subsystem.
803 ////////////////////////////////////////////////////////////////////
804 FGViewMgr *viewmgr = new FGViewMgr;
805 globals->set_viewmgr( viewmgr );
808 fgSplashProgress("generating sky elements");
811 } else if ( idle_state == 6 ) {
813 // Initialize the sky
814 SGPath ephem_data_path( globals->get_fg_root() );
815 ephem_data_path.append( "Astro" );
816 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
817 ephem->update( globals->get_time_params()->getMjd(),
818 globals->get_time_params()->getLst(),
820 globals->set_ephem( ephem );
822 // TODO: move to environment mgr
824 SGPath texture_path(globals->get_fg_root());
825 texture_path.append("Textures");
826 texture_path.append("Sky");
827 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
828 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
829 thesky->add_cloud_layer(layer);
832 SGPath sky_tex_path( globals->get_fg_root() );
833 sky_tex_path.append( "Textures" );
834 sky_tex_path.append( "Sky" );
835 thesky->texture_path( sky_tex_path.str() );
837 // The sun and moon diameters are scaled down numbers of the
838 // actual diameters. This was needed to fit both the sun and the
839 // moon within the distance to the far clip plane.
840 // Moon diameter: 3,476 kilometers
841 // Sun diameter: 1,390,000 kilometers
842 thesky->build( 80000.0, 80000.0,
844 globals->get_ephem()->getNumPlanets(),
845 globals->get_ephem()->getPlanets(),
846 globals->get_ephem()->getNumStars(),
847 globals->get_ephem()->getStars(),
848 fgGetNode("/environment", true));
850 // Initialize MagVar model
851 SGMagVar *magvar = new SGMagVar();
852 globals->set_mag( magvar );
855 // kludge to initialize mag compass
856 // (should only be done for in-flight
858 // update magvar model
859 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
860 * SGD_DEGREES_TO_RADIANS,
861 fgGetDouble("/position/latitude-deg")
862 * SGD_DEGREES_TO_RADIANS,
863 fgGetDouble("/position/altitude-ft")
865 globals->get_time_params()->getJD() );
866 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
867 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
868 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
871 // airport = new ssgBranch;
872 // airport->setName( "Airport Lighting" );
873 // lighting->addKid( airport );
875 // build our custom render states
876 fgSplashProgress("initializing subsystems");
879 } else if ( idle_state == 7 ) {
881 // Initialize audio support
882 #ifdef ENABLE_AUDIO_SUPPORT
884 // Start the intro music
885 if ( fgGetBool("/sim/startup/intro-music") ) {
886 SGPath mp3file( globals->get_fg_root() );
887 mp3file.append( "Sounds/intro.mp3" );
889 SG_LOG( SG_GENERAL, SG_INFO,
890 "Starting intro music: " << mp3file.str() );
892 #if defined( __CYGWIN__ )
893 string command = "start /m `cygpath -w " + mp3file.str() + "`";
894 #elif defined( WIN32 )
895 string command = "start /m " + mp3file.str();
897 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
900 system ( command.c_str() );
904 // These are a few miscellaneous things that aren't really
905 // "subsystems" but still need to be initialized.
908 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
909 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
913 // This is the top level init routine which calls all the
914 // other subsystem initialization routines. If you are adding
915 // a subsystem to flightgear, its initialization call should be
916 // located in this routine.
917 if( !fgInitSubsystems()) {
918 SG_LOG( SG_GENERAL, SG_ALERT,
919 "Subsystem initialization failed ..." );
922 fgSplashProgress("setting up time & renderer");
925 } else if ( idle_state == 8 ) {
927 // Initialize the time offset (warp) after fgInitSubsystem
928 // (which initializes the lighting interpolation tables.)
931 // setup OpenGL view parameters
932 globals->get_renderer()->init();
934 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
935 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
936 fgGetInt("/sim/startup/ysize") );
938 fgSplashProgress("loading scenery objects");
942 if ( idle_state == 1000 ) {
943 // We've finished all our initialization steps, from now on we
944 // run the main loop.
945 fgSetBool("sim/sceneryloaded", false);
946 fgRegisterIdleHandler( fgMainLoop );
951 static void upper_case_property(const char *name)
953 SGPropertyNode *p = fgGetNode(name, false);
955 p = fgGetNode(name, true);
956 p->setStringValue("");
958 SGPropertyNode::Type t = p->getType();
959 if (t == SGPropertyNode::NONE || t == SGPropertyNode::UNSPECIFIED)
960 p->setStringValue("");
962 assert(t == SGPropertyNode::STRING);
964 p->addChangeListener(new FGMakeUpperCase);
968 // Main top level initialization
969 bool fgMainInit( int argc, char **argv ) {
971 #if defined( macintosh )
972 freopen ("stdout.txt", "w", stdout );
973 freopen ("stderr.txt", "w", stderr );
974 argc = ccommand( &argv );
977 // set default log levels
978 sglog().setLogLevels( SG_ALL, SG_ALERT );
981 #ifdef FLIGHTGEAR_VERSION
982 version = FLIGHTGEAR_VERSION;
984 version = "unknown version";
986 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
988 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
990 // Allocate global data structures. This needs to happen before
991 // we parse command line options
993 globals = new FGGlobals;
995 // seed the random number generator
998 FGControls *controls = new FGControls;
999 globals->set_controls( controls );
1001 string_list *col = new string_list;
1002 globals->set_channel_options_list( col );
1004 upper_case_property("/sim/presets/airport-id");
1005 upper_case_property("/sim/presets/runway");
1006 upper_case_property("/sim/tower/airport-id");
1008 // Scan the config file(s) and command line options to see if
1009 // fg_root was specified (ignore all other options for now)
1010 fgInitFGRoot(argc, argv);
1012 // Check for the correct base package version
1013 static char required_version[] = "1.0.0";
1014 string base_version = fgBasePackageVersion();
1015 if ( !(base_version == required_version) ) {
1016 // tell the operator how to use this application
1018 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
1019 cerr << endl << "Base package check failed ... " \
1020 << "Found version " << base_version << " at: " \
1021 << globals->get_fg_root() << endl;
1022 cerr << "Please upgrade to version: " << required_version << endl;
1024 cerr << "Hit a key to continue..." << endl;
1030 // Load the configuration parameters. (Command line options
1031 // override config file options. Config file options override
1033 if ( !fgInitConfig(argc, argv) ) {
1034 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
1038 // Initialize the Window/Graphics environment.
1039 #if !defined(__APPLE__) || defined(OSX_BUNDLE)
1040 // Mac OS X command line ("non-bundle") applications call this
1041 // from main(), in bootstrap.cxx. Andy doesn't know why, someone
1042 // feel free to add comments...
1043 fgOSInit(&argc, argv);
1044 _bootstrap_OSInit++;
1047 fgRegisterWindowResizeHandler( &FGRenderer::resize );
1048 fgRegisterIdleHandler( &fgIdleFunction );
1049 fgRegisterDrawHandler( &FGRenderer::update );
1051 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
1052 bool get_stencil_buffer = true;
1054 bool get_stencil_buffer = false;
1057 // Initialize plib net interface
1058 netInit( &argc, argv );
1060 // Clouds3D requires an alpha channel
1061 // clouds may require stencil buffer
1062 fgOSOpenWindow( fgGetInt("/sim/startup/xsize"),
1063 fgGetInt("/sim/startup/ysize"),
1064 fgGetInt("/sim/rendering/bits-per-pixel"),
1065 fgGetBool("/sim/rendering/clouds3d-enable"),
1067 fgGetBool("/sim/startup/fullscreen") );
1069 // Initialize the splash screen right away
1073 // pass control off to the master event handler
1076 // we never actually get here ... but to avoid compiler warnings,