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., 675 Mass Ave, Cambridge, MA 02139, 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>
60 #include <Include/general.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 <FDM/UIUCModel/uiuc_aircraftdir.h>
72 // #include <FDM/ADA.hxx>
73 #include <ATC/ATCdisplay.hxx>
74 #include <ATC/ATCmgr.hxx>
75 #include <ATC/AIMgr.hxx>
76 #include <Replay/replay.hxx>
77 #include <Time/tmp.hxx>
78 #include <Time/fg_timer.hxx>
79 #include <Environment/environment_mgr.hxx>
80 #include <GUI/new_gui.hxx>
83 #include <MultiPlayer/multiplaytxmgr.hxx>
84 #include <MultiPlayer/multiplayrxmgr.hxx>
89 #include "fg_commands.hxx"
91 #include "renderer.hxx"
97 static double real_delta_time_sec = 0.0;
98 double delta_time_sec = 0.0;
99 extern float init_volume;
103 # include <console.h> // -dw- for command line dialog
106 // This is a record containing a bit of global housekeeping information
109 // Specify our current idle function state. This is used to run all
110 // our initializations out of the idle callback so that we can get a
111 // splash screen up and running right away.
113 long global_multi_loop;
115 SGTimeStamp last_time_stamp;
116 SGTimeStamp current_time_stamp;
118 // The atexit() functio handler should know when the graphical subsystem
120 extern int _bootstrap_OSInit;
124 // Update internal time dependent calculations (i.e. flight model)
125 // FIXME: this distinction is obsolete; all subsystems now get delta
127 void fgUpdateTimeDepCalcs() {
128 static bool inited = false;
130 static const SGPropertyNode *replay_master
131 = fgGetNode( "/sim/freeze/replay", true );
132 static SGPropertyNode *replay_time
133 = fgGetNode( "/sim/replay/time", true );
134 // static const SGPropertyNode *replay_end_time
135 // = fgGetNode( "/sim/replay/end-time", true );
137 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
139 // Initialize the FDM here if it hasn't been and if we have a
140 // scenery elevation hit.
142 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
143 // << " cur_elev = " << scenery.get_cur_elev() << endl;
145 if ( !cur_fdm_state->get_inited() &&
146 globals->get_scenery()->get_cur_elev() > -9990 )
148 SG_LOG(SG_FLIGHT,SG_INFO, "Finally initializing fdm");
149 cur_fdm_state->init();
150 if ( cur_fdm_state->get_bound() ) {
151 cur_fdm_state->unbind();
153 cur_fdm_state->bind();
156 // conceptually, the following block could be done for each fdm
158 if ( cur_fdm_state->get_inited() ) {
159 // we have been inited, and we are good to go ...
165 if ( ! replay_master->getBoolValue() ) {
166 cur_fdm_state->update( delta_time_sec );
168 FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
169 r->replay( replay_time->getDoubleValue() );
170 replay_time->setDoubleValue( replay_time->getDoubleValue()
172 * fgGetInt("/sim/speed-up") ) );
175 // do nothing, fdm isn't inited yet
178 globals->get_model_mgr()->update(delta_time_sec);
179 globals->get_aircraft_model()->update(delta_time_sec);
181 // update the view angle
182 globals->get_viewmgr()->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 const SGPropertyNode *longitude
207 = fgGetNode("/position/longitude-deg");
208 static const SGPropertyNode *latitude
209 = fgGetNode("/position/latitude-deg");
210 static const SGPropertyNode *altitude
211 = fgGetNode("/position/altitude-ft");
212 static const SGPropertyNode *clock_freeze
213 = fgGetNode("/sim/freeze/clock", true);
214 static const SGPropertyNode *cur_time_override
215 = fgGetNode("/sim/time/cur-time-override", true);
216 // static const SGPropertyNode *replay_master
217 // = fgGetNode("/sim/freeze/replay", true);
219 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
221 // Update the elapsed time.
222 static bool first_time = true;
224 last_time_stamp.stamp();
228 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
229 if ( throttle_hz > 0.0 ) {
230 // simple frame rate throttle
231 double dt = 1000000.0 / throttle_hz;
232 current_time_stamp.stamp();
233 while ( current_time_stamp - last_time_stamp < dt ) {
234 current_time_stamp.stamp();
237 // run as fast as the app will go
238 current_time_stamp.stamp();
242 = double(current_time_stamp - last_time_stamp) / 1000000.0;
243 // round the real time down to a multiple of 1/model-hz.
244 // this way all systems are updated the _same_ amount of dt.
246 static double rem = 0.0;
247 real_delta_time_sec += rem;
248 double hz = model_hz;
249 double nit = floor(real_delta_time_sec*hz);
250 rem = real_delta_time_sec - nit/hz;
251 real_delta_time_sec = nit/hz;
255 if ( clock_freeze->getBoolValue() ) {
258 delta_time_sec = real_delta_time_sec;
260 last_time_stamp = current_time_stamp;
261 globals->inc_sim_time_sec( delta_time_sec );
262 SGAnimation::set_sim_time_sec( globals->get_sim_time_sec() );
264 // These are useful, especially for Nasal scripts.
265 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
266 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
268 static long remainder = 0;
270 #ifdef FANCY_FRAME_COUNTER
274 static time_t last_time = 0;
275 static int frames = 0;
276 #endif // FANCY_FRAME_COUNTER
278 SGTime *t = globals->get_time_params();
280 globals->get_event_mgr()->update(delta_time_sec);
282 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
283 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
285 #if defined( ENABLE_PLIB_JOYSTICK )
286 // Read joystick and update control settings
287 // if ( fgGetString("/sim/control-mode") == "joystick" )
293 // Fix elevation. I'm just sticking this here for now, it should
294 // probably move eventually
296 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
297 scenery.get_cur_elev(),
298 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
299 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
301 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
302 scenery.get_cur_elev(),
303 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
304 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
306 // cout << "Warp = " << globals->get_warp() << endl;
309 static bool last_clock_freeze = false;
311 if ( clock_freeze->getBoolValue() ) {
312 // clock freeze requested
313 if ( cur_time_override->getLongValue() == 0 ) {
314 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
315 globals->set_warp( 0 );
318 // no clock freeze requested
319 if ( last_clock_freeze == true ) {
320 // clock just unfroze, let's set warp as the difference
321 // between frozen time and current time so we don't get a
322 // time jump (and corresponding sky object and lighting
324 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
325 fgSetLong( "/sim/time/cur-time-override", 0 );
327 if ( globals->get_warp_delta() != 0 ) {
328 globals->inc_warp( globals->get_warp_delta() );
332 last_clock_freeze = clock_freeze->getBoolValue();
334 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
335 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
336 cur_time_override->getLongValue(),
337 globals->get_warp() );
339 if (globals->get_warp_delta() != 0) {
340 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
344 // update magvar model
345 globals->get_mag()->update( longitude->getDoubleValue()
346 * SGD_DEGREES_TO_RADIANS,
347 latitude->getDoubleValue()
348 * SGD_DEGREES_TO_RADIANS,
349 altitude->getDoubleValue() * SG_FEET_TO_METER,
350 globals->get_time_params()->getJD() );
352 // Get elapsed time (in usec) for this past frame
353 elapsed = fgGetTimeInterval();
354 SG_LOG( SG_ALL, SG_DEBUG,
355 "Elapsed time interval is = " << elapsed
356 << ", previous remainder is = " << remainder );
358 // Calculate frame rate average
359 #ifdef FANCY_FRAME_COUNTER
360 /* old fps calculation */
364 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
365 tmp = general.get_frame(i);
367 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
368 general.set_frame(i+1,tmp);
370 tmp = 1000000.0 / (float)elapsed;
371 general.set_frame(0,tmp);
372 // printf("frame[0] = %.2f\n", general.frames[0]);
374 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
375 // printf("ave = %.2f\n", general.frame_rate);
378 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
379 general.set_frame_rate( frames );
380 fgSetInt("/sim/frame-rate", frames);
381 SG_LOG( SG_ALL, SG_DEBUG,
382 "--> Frame rate is = " << general.get_frame_rate() );
385 last_time = t->get_cur_time();
390 if (fgGetBool("/sim/ATC/enabled"))
391 globals->get_ATC_mgr()->update(delta_time_sec);
393 // Run the AI subsystem
394 if (fgGetBool("/sim/ai-traffic/enabled"))
395 globals->get_AI_mgr()->update(delta_time_sec);
398 // Update any multiplayer models
399 globals->get_multiplayer_rx_mgr()->Update();
404 // Calculate model iterations needed for next frame
405 elapsed += remainder;
407 global_multi_loop = (long)(((double)elapsed * 0.000001) * model_hz );
408 remainder = elapsed - ( (global_multi_loop*1000000) / model_hz );
409 SG_LOG( SG_ALL, SG_DEBUG,
410 "Model iterations needed = " << global_multi_loop
411 << ", new remainder = " << remainder );
413 // chop max interations to something reasonable if the sim was
414 // delayed for an excesive amount of time
415 if ( global_multi_loop > 2.0 * model_hz ) {
416 global_multi_loop = (int)(2.0 * model_hz );
420 bool scenery_loaded = fgGetBool("sim/sceneryloaded") || fgGetBool("sim/sceneryloaded-override");
423 if ( global_multi_loop > 0) {
424 // first run the flight model each frame until it is intialized
425 // then continue running each frame only after initial scenery load is complete.
426 if (!cur_fdm_state->get_inited() || scenery_loaded) {
427 fgUpdateTimeDepCalcs();
430 SG_LOG( SG_ALL, SG_DEBUG,
431 "Elapsed time is zero ... we're zinging" );
434 // Do any I/O channel work that might need to be done
435 globals->get_io()->update( real_delta_time_sec );
437 // see if we need to load any deferred-load textures
438 globals->get_matlib()->load_next_deferred();
440 // Run audio scheduler
441 #ifdef ENABLE_AUDIO_SUPPORT
442 if ( globals->get_soundmgr()->is_working() ) {
443 globals->get_soundmgr()->update( delta_time_sec );
447 globals->get_subsystem_mgr()->update(delta_time_sec);
450 // Tile Manager updates - see if we need to load any new scenery tiles.
451 // this code ties together the fdm, viewer and scenery classes...
452 // we may want to move this to it's own class at some point
454 double visibility_meters = fgGetDouble("/environment/visibility-m");
455 FGViewer *current_view = globals->get_current_view();
457 // get the location data for the primary FDM (now hardcoded to ac model)...
458 SGLocation *acmodel_loc = NULL;
459 acmodel_loc = (SGLocation *)globals->
460 get_aircraft_model()->get3DModel()->getSGLocation();
462 // update tile manager for FDM...
463 // ...only if location is different than the current-view location
464 // (to avoid duplicating effort)
465 if( !fgGetBool("/sim/current-view/config/from-model") ) {
466 if( acmodel_loc != NULL ) {
467 globals->get_tile_mgr()->prep_ssg_nodes( acmodel_loc,
469 globals->get_tile_mgr()->
470 update( acmodel_loc, visibility_meters,
472 get_absolute_view_pos(globals->
473 get_scenery()->get_center()) );
474 // save results of update in SGLocation for fdm...
475 if ( globals->get_scenery()->get_cur_elev() > -9990 ) {
477 set_cur_elev_m( globals->get_scenery()->get_cur_elev() );
478 fgSetDouble("/position/ground-elev-m",
479 globals->get_scenery()->get_cur_elev());
482 set_tile_center( globals->get_scenery()->get_next_center() );
486 globals->get_tile_mgr()->prep_ssg_nodes( current_view->getSGLocation(),
488 // update tile manager for view...
489 // IMPORTANT!!! the tilemgr update for view location _must_ be
490 // done last after the FDM's until all of Flight Gear code
491 // references the viewer's location for elevation instead of the
492 // "scenery's" current elevation.
493 SGLocation *view_location = globals->get_current_view()->getSGLocation();
494 globals->get_tile_mgr()->update( view_location, visibility_meters,
495 current_view->get_absolute_view_pos() );
496 // save results of update in SGLocation for fdm...
497 if ( globals->get_scenery()->get_cur_elev() > -9990 ) {
498 current_view->getSGLocation()->
499 set_cur_elev_m( globals->get_scenery()->get_cur_elev() );
501 current_view->getSGLocation()->
502 set_tile_center( globals->get_scenery()->get_next_center() );
504 #ifdef ENABLE_AUDIO_SUPPORT
505 // Right now we make a simplifying assumption that the primary
506 // aircraft is the source of all sounds and that all sounds are
507 // positioned relative to the current view position.
509 static sgVec3 last_pos_offset;
511 // set positional offset for sources
512 sgVec3 source_pos_offset;
513 sgSubVec3( source_pos_offset,
514 view_location->get_view_pos(), acmodel_loc->get_view_pos() );
515 // cout << "pos all = " << source_pos_offset[0] << " " << source_pos_offset[1] << " " << source_pos_offset[2] << endl;
516 globals->get_soundmgr()->set_source_pos_all( source_pos_offset );
520 sgSubVec3( source_vel, source_pos_offset, last_pos_offset );
521 sgScaleVec3( source_vel, delta_time_sec );
522 sgCopyVec3( last_pos_offset, source_pos_offset );
523 // cout << "vel = " << source_vel[0] << " " << source_vel[1] << " " << source_vel[2] << endl;
524 globals->get_soundmgr()->set_source_vel_all( source_vel );
526 // Right now we make a simplifying assumption that the listener is
527 // always positioned at the origin.
529 sgSetVec3( listener_pos, 0.0, 0.0, 0.0 );
530 // cout << "listener = " << listener_pos[0] << " " << listener_pos[1] << " " << listener_pos[2] << endl;
531 globals->get_soundmgr()->set_listener_pos( listener_pos );
534 // If fdm location is same as viewer's then we didn't do the
535 // update for fdm location above so we need to save the viewer
536 // results in the fdm SGLocation as well...
537 if( fgGetBool("/sim/current-view/config/from-model") ) {
538 if( acmodel_loc != 0 ) {
539 if ( globals->get_scenery()->get_cur_elev() > -9990 ) {
540 acmodel_loc->set_cur_elev_m( globals->get_scenery()->
542 fgSetDouble("/position/ground-elev-m",
543 globals->get_scenery()->get_cur_elev());
545 acmodel_loc->set_tile_center( globals->get_scenery()->
550 // END Tile Manager udpates
552 if (!scenery_loaded && globals->get_tile_mgr()->all_queues_empty() && cur_fdm_state->get_inited()) {
553 fgSetBool("sim/sceneryloaded",true);
554 fgSetFloat("/sim/sound/volume", init_volume);
555 globals->get_soundmgr()->set_volume(init_volume);
558 if (fgGetBool("/sim/rendering/specular-highlight")) {
559 glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
560 // glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
562 glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SINGLE_COLOR);
563 // glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_FALSE);
568 SG_LOG( SG_ALL, SG_DEBUG, "" );
572 // This is the top level master main function that is registered as
575 // The first few passes take care of initialization things (a couple
576 // per pass) and once everything has been initialized fgMainLoop from
579 static void fgIdleFunction ( void ) {
580 // printf("idle state == %d\n", idle_state);
582 if ( idle_state == 0 ) {
583 // Initialize the splash screen right away
584 if ( fgGetBool("/sim/startup/splash-screen") ) {
585 fgSplashInit(fgGetString("/sim/startup/splash-texture"));
589 } else if ( idle_state == 1 ) {
590 // Initialize audio support
591 #ifdef ENABLE_AUDIO_SUPPORT
593 // Start the intro music
594 if ( fgGetBool("/sim/startup/intro-music") ) {
595 SGPath mp3file( globals->get_fg_root() );
596 mp3file.append( "Sounds/intro.mp3" );
598 SG_LOG( SG_GENERAL, SG_INFO,
599 "Starting intro music: " << mp3file.str() );
601 #if defined( __CYGWIN__ )
602 string command = "start /m `cygpath -w " + mp3file.str() + "`";
603 #elif defined( WIN32 )
604 string command = "start /m " + mp3file.str();
606 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
609 system ( command.c_str() );
614 } else if ( idle_state == 2 ) {
615 // These are a few miscellaneous things that aren't really
616 // "subsystems" but still need to be initialized.
619 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
620 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
625 } else if ( idle_state == 3 ) {
626 // This is the top level init routine which calls all the
627 // other subsystem initialization routines. If you are adding
628 // a subsystem to flightgear, its initialization call should
629 // located in this routine.
630 if( !fgInitSubsystems()) {
631 SG_LOG( SG_GENERAL, SG_ALERT,
632 "Subsystem initializations failed ..." );
637 } else if ( idle_state == 4 ) {
638 // Initialize the time offset (warp) after fgInitSubsystem
639 // (which initializes the lighting interpolation tables.)
642 // setup OpenGL view parameters
643 globals->get_renderer()->init();
645 // Read the list of available aircrafts
649 } else if ( idle_state == 5 ) {
652 } else if ( idle_state == 6 ) {
657 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
658 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
659 fgGetInt("/sim/startup/ysize") );
663 if ( idle_state == 1000 ) {
664 // We've finished all our initialization steps, from now on we
665 // run the main loop.
666 fgSetBool("sim/sceneryloaded",false);
668 fgRegisterIdleHandler(fgMainLoop);
670 if ( fgGetBool("/sim/startup/splash-screen") ) {
671 fgSplashUpdate(0.0, 1.0);
677 // Main top level initialization
678 bool fgMainInit( int argc, char **argv ) {
680 #if defined( macintosh )
681 freopen ("stdout.txt", "w", stdout );
682 freopen ("stderr.txt", "w", stderr );
683 argc = ccommand( &argv );
686 // set default log levels
687 sglog().setLogLevels( SG_ALL, SG_ALERT );
690 #ifdef FLIGHTGEAR_VERSION
691 version = FLIGHTGEAR_VERSION;
693 version = "unknown version";
695 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
697 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
699 // Allocate global data structures. This needs to happen before
700 // we parse command line options
702 globals = new FGGlobals;
704 // seed the random number generater
707 FGControls *controls = new FGControls;
708 globals->set_controls( controls );
710 string_list *col = new string_list;
711 globals->set_channel_options_list( col );
713 // Scan the config file(s) and command line options to see if
714 // fg_root was specified (ignore all other options for now)
715 fgInitFGRoot(argc, argv);
717 // Check for the correct base package version
718 static char required_version[] = "0.9.6";
719 string base_version = fgBasePackageVersion();
720 if ( !(base_version == required_version) ) {
721 // tell the operator how to use this application
723 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
724 cerr << endl << "Base package check failed ... " \
725 << "Found version " << base_version << " at: " \
726 << globals->get_fg_root() << endl;
727 cerr << "Please upgrade to version: " << required_version << endl;
729 cerr << "Hit a key to continue..." << endl;
735 sgUseDisplayList = fgGetBool( "/sim/rendering/use-display-list", true );
737 // Initialize the Aircraft directory to "" (UIUC)
740 // Load the configuration parameters. (Command line options
741 // overrides config file options. Config file options override
743 if ( !fgInitConfig(argc, argv) ) {
744 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
748 // Initialize the Window/Graphics environment.
749 #if !defined(__APPLE__) || defined(OSX_BUNDLE)
750 // Mac OS X command line ("non-bundle") applications call this
751 // from main(), in bootstrap.cxx. Andy doesn't know why, someone
752 // feel free to add comments...
753 fgOSInit(&argc, argv);
757 fgRegisterWindowResizeHandler( FGRenderer::resize );
758 fgRegisterIdleHandler( fgIdleFunction );
759 fgRegisterDrawHandler( FGRenderer::update );
761 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
762 bool get_stencil_buffer = true;
764 bool get_stencil_buffer = false;
767 // Clouds3D requires an alpha channel
768 // clouds may require stencil buffer
769 fgOSOpenWindow( fgGetInt("/sim/startup/xsize"),
770 fgGetInt("/sim/startup/ysize"),
771 fgGetInt("/sim/rendering/bits-per-pixel"),
772 fgGetBool("/sim/rendering/clouds3d"),
774 fgGetBool("/sim/startup/fullscreen") );
776 // This seems to be the absolute earliest in the init sequence
777 // that these calls will return valid info. Too bad it's after
778 // we've already created and sized out window. :-(
779 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
780 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
781 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
782 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
785 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
786 general.set_glMaxTexSize( tmp );
787 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
789 glGetIntegerv( GL_DEPTH_BITS, &tmp );
790 general.set_glDepthBits( tmp );
791 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
793 // Initialize plib net interface
794 netInit( &argc, argv );
796 // Initialize ssg (from plib). Needs to come before we do any
797 // other ssg stuff, but after opengl has been initialized.
800 // Initialize the user interface (we need to do this before
801 // passing off control to the OS main loop and before
802 // fgInitGeneral to get our fonts !!!
805 // Read the list of available aircrafts
808 #ifdef GL_EXT_texture_lod_bias
809 glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, -0.5 ) ;
812 // get the address of our OpenGL extensions
813 if ( fgGetBool("/sim/rendering/distance-attenuation") )
815 if (SGIsOpenGLExtensionSupported("GL_EXT_point_parameters") ) {
816 glPointParameterIsSupported = true;
817 glPointParameterfPtr = (glPointParameterfProc)
818 SGLookupFunction("glPointParameterfEXT");
819 glPointParameterfvPtr = (glPointParameterfvProc)
820 SGLookupFunction("glPointParameterfvEXT");
822 } else if ( SGIsOpenGLExtensionSupported("GL_ARB_point_parameters") ) {
823 glPointParameterIsSupported = true;
824 glPointParameterfPtr = (glPointParameterfProc)
825 SGLookupFunction("glPointParameterfARB");
826 glPointParameterfvPtr = (glPointParameterfvProc)
827 SGLookupFunction("glPointParameterfvARB");
829 glPointParameterIsSupported = false;
832 // based on the requested presets, calculate the true starting
837 SGTime *t = fgInitTime();
838 globals->set_time_params( t );
840 // Do some quick general initializations
841 if( !fgInitGeneral()) {
842 SG_LOG( SG_GENERAL, SG_ALERT,
843 "General initializations failed ..." );
847 ////////////////////////////////////////////////////////////////////
848 // Initialize the property-based built-in commands
849 ////////////////////////////////////////////////////////////////////
852 ////////////////////////////////////////////////////////////////////
853 // Initialize the material manager
854 ////////////////////////////////////////////////////////////////////
855 globals->set_matlib( new SGMaterialLib );
857 globals->set_model_lib(new SGModelLib);
859 ////////////////////////////////////////////////////////////////////
860 // Initialize the TG scenery subsystem.
861 ////////////////////////////////////////////////////////////////////
862 globals->set_scenery( new FGScenery );
863 globals->get_scenery()->init();
864 globals->get_scenery()->bind();
865 globals->set_tile_mgr( new FGTileMgr );
867 ////////////////////////////////////////////////////////////////////
868 // Initialize the general model subsystem.
869 ////////////////////////////////////////////////////////////////////
870 globals->set_model_mgr(new FGModelMgr);
871 globals->get_model_mgr()->init();
872 globals->get_model_mgr()->bind();
874 ////////////////////////////////////////////////////////////////////
875 // Initialize the 3D aircraft model subsystem (has a dependency on
876 // the scenery subsystem.)
877 ////////////////////////////////////////////////////////////////////
878 globals->set_aircraft_model(new FGAircraftModel);
879 globals->get_aircraft_model()->init();
880 globals->get_aircraft_model()->bind();
882 ////////////////////////////////////////////////////////////////////
883 // Initialize the view manager subsystem.
884 ////////////////////////////////////////////////////////////////////
885 FGViewMgr *viewmgr = new FGViewMgr;
886 globals->set_viewmgr( viewmgr );
891 // Initialize the sky
892 SGPath ephem_data_path( globals->get_fg_root() );
893 ephem_data_path.append( "Astro" );
894 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
895 ephem->update( globals->get_time_params()->getMjd(),
896 globals->get_time_params()->getLst(),
898 globals->set_ephem( ephem );
900 // TODO: move to environment mgr
902 SGPath texture_path(globals->get_fg_root());
903 texture_path.append("Textures");
904 texture_path.append("Sky");
905 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
906 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
907 thesky->add_cloud_layer(layer);
910 SGPath sky_tex_path( globals->get_fg_root() );
911 sky_tex_path.append( "Textures" );
912 sky_tex_path.append( "Sky" );
913 thesky->texture_path( sky_tex_path.str() );
915 // The sun and moon diameters are scaled down numbers of the
916 // actual diameters. This was needed to fit bot the sun and the
917 // moon within the distance to the far clip plane.
918 // Moon diameter: 3,476 kilometers
919 // Sun diameter: 1,390,000 kilometers
920 thesky->build( 80000.0, 80000.0,
922 globals->get_ephem()->getNumPlanets(),
923 globals->get_ephem()->getPlanets(),
924 globals->get_ephem()->getNumStars(),
925 globals->get_ephem()->getStars() );
927 // Initialize MagVar model
928 SGMagVar *magvar = new SGMagVar();
929 globals->set_mag( magvar );
932 // kludge to initialize mag compass
933 // (should only be done for in-flight
935 // update magvar model
936 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
937 * SGD_DEGREES_TO_RADIANS,
938 fgGetDouble("/position/latitude-deg")
939 * SGD_DEGREES_TO_RADIANS,
940 fgGetDouble("/position/altitude-ft")
942 globals->get_time_params()->getJD() );
943 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
944 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
946 // airport = new ssgBranch;
947 // airport->setName( "Airport Lighting" );
948 // lighting->addKid( airport );
950 // build our custom render states
951 globals->get_renderer()->build_states();
953 // pass control off to the master event handler
956 // we never actually get here ... but to avoid compiler warnings,