1 // main.cxx -- top level sim routines
3 // Written by Curtis Olson, started May 1997.
5 // Copyright (C) 1997 - 2002 Curtis L. Olson - curt@flightgear.org
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/radiostack.hxx>
63 #include <Cockpit/hud.hxx>
64 #include <Model/panelnode.hxx>
65 #include <Model/modelmgr.hxx>
66 #include <Model/acmodel.hxx>
67 #include <Scenery/scenery.hxx>
68 #include <Scenery/tilemgr.hxx>
69 #include <FDM/flight.hxx>
70 #include <FDM/UIUCModel/uiuc_aircraftdir.h>
71 #include <FDM/ADA.hxx>
72 #include <ATC/ATCdisplay.hxx>
73 #include <ATC/ATCmgr.hxx>
74 #include <ATC/AIMgr.hxx>
75 #include <Replay/replay.hxx>
76 #include <Time/tmp.hxx>
77 #include <Time/fg_timer.hxx>
78 #include <Environment/environment_mgr.hxx>
79 #include <GUI/new_gui.hxx>
82 #include <MultiPlayer/multiplaytxmgr.hxx>
83 #include <MultiPlayer/multiplayrxmgr.hxx>
88 #include "fg_commands.hxx"
90 #include "renderer.hxx"
96 static double real_delta_time_sec = 0.0;
97 double delta_time_sec = 0.0;
101 # include <console.h> // -dw- for command line dialog
104 // This is a record containing a bit of global housekeeping information
107 // Specify our current idle function state. This is used to run all
108 // our initializations out of the idle callback so that we can get a
109 // splash screen up and running right away.
111 long global_multi_loop;
114 SGTimeStamp last_time_stamp;
115 SGTimeStamp current_time_stamp;
117 // The atexit() functio handler should know when the graphical subsystem
119 extern int _bootstrap_OSInit;
123 // Update internal time dependent calculations (i.e. flight model)
124 // FIXME: this distinction is obsolete; all subsystems now get delta
126 void fgUpdateTimeDepCalcs() {
127 static bool inited = false;
129 static const SGPropertyNode *replay_master
130 = fgGetNode( "/sim/freeze/replay", true );
131 static SGPropertyNode *replay_time
132 = fgGetNode( "/sim/replay/time", true );
133 // static const SGPropertyNode *replay_end_time
134 // = fgGetNode( "/sim/replay/end-time", true );
136 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
138 // Initialize the FDM here if it hasn't been and if we have a
139 // scenery elevation hit.
141 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
142 // << " cur_elev = " << scenery.get_cur_elev() << endl;
144 if ( !cur_fdm_state->get_inited() &&
145 globals->get_scenery()->get_cur_elev() > -9990 )
147 SG_LOG(SG_FLIGHT,SG_INFO, "Finally initializing fdm");
148 cur_fdm_state->init();
149 if ( cur_fdm_state->get_bound() ) {
150 cur_fdm_state->unbind();
152 cur_fdm_state->bind();
155 // conceptually, the following block could be done for each fdm
157 if ( cur_fdm_state->get_inited() ) {
158 // we have been inited, and we are good to go ...
164 if ( ! replay_master->getBoolValue() ) {
165 cur_fdm_state->update( delta_time_sec );
167 FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
168 r->replay( replay_time->getDoubleValue() );
169 replay_time->setDoubleValue( replay_time->getDoubleValue()
171 * fgGetInt("/sim/speed-up") ) );
174 // do nothing, fdm isn't inited yet
177 globals->get_model_mgr()->update(delta_time_sec);
178 globals->get_aircraft_model()->update(delta_time_sec);
180 // update the view angle
181 globals->get_viewmgr()->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() );
188 // Update radio stack model
189 current_radiostack->update(delta_time_sec);
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 *replay_master
218 // = fgGetNode("/sim/freeze/replay", true);
220 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping",true);
222 // Update the elapsed time.
223 static bool first_time = true;
225 last_time_stamp.stamp();
229 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
230 if ( throttle_hz > 0.0 ) {
231 // simple frame rate throttle
232 double dt = 1000000.0 / throttle_hz;
233 current_time_stamp.stamp();
234 while ( current_time_stamp - last_time_stamp < dt ) {
235 current_time_stamp.stamp();
238 // run as fast as the app will go
239 current_time_stamp.stamp();
243 = double(current_time_stamp - last_time_stamp) / 1000000.0;
244 if ( clock_freeze->getBoolValue() ) {
247 delta_time_sec = real_delta_time_sec;
249 last_time_stamp = current_time_stamp;
250 globals->inc_sim_time_sec( delta_time_sec );
251 SGAnimation::set_sim_time_sec( globals->get_sim_time_sec() );
253 // These are useful, especially for Nasal scripts.
254 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
255 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
257 static long remainder = 0;
259 #ifdef FANCY_FRAME_COUNTER
263 static time_t last_time = 0;
264 static int frames = 0;
265 #endif // FANCY_FRAME_COUNTER
267 SGTime *t = globals->get_time_params();
269 globals->get_event_mgr()->update(delta_time_sec);
271 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
272 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
274 #if defined( ENABLE_PLIB_JOYSTICK )
275 // Read joystick and update control settings
276 // if ( fgGetString("/sim/control-mode") == "joystick" )
282 // Fix elevation. I'm just sticking this here for now, it should
283 // probably move eventually
285 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
286 scenery.get_cur_elev(),
287 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
288 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
290 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
291 scenery.get_cur_elev(),
292 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
293 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
295 // cout << "Warp = " << globals->get_warp() << endl;
298 static bool last_clock_freeze = false;
300 if ( clock_freeze->getBoolValue() ) {
301 // clock freeze requested
302 if ( cur_time_override->getLongValue() == 0 ) {
303 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
304 globals->set_warp( 0 );
307 // no clock freeze requested
308 if ( last_clock_freeze == true ) {
309 // clock just unfroze, let's set warp as the difference
310 // between frozen time and current time so we don't get a
311 // time jump (and corresponding sky object and lighting
313 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
314 fgSetLong( "/sim/time/cur-time-override", 0 );
316 if ( globals->get_warp_delta() != 0 ) {
317 globals->inc_warp( globals->get_warp_delta() );
321 last_clock_freeze = clock_freeze->getBoolValue();
323 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
324 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
325 cur_time_override->getLongValue(),
326 globals->get_warp() );
328 if (globals->get_warp_delta() != 0) {
329 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
333 // update magvar model
334 globals->get_mag()->update( longitude->getDoubleValue()
335 * SGD_DEGREES_TO_RADIANS,
336 latitude->getDoubleValue()
337 * SGD_DEGREES_TO_RADIANS,
338 altitude->getDoubleValue() * SG_FEET_TO_METER,
339 globals->get_time_params()->getJD() );
341 // Get elapsed time (in usec) for this past frame
342 elapsed = fgGetTimeInterval();
343 SG_LOG( SG_ALL, SG_DEBUG,
344 "Elapsed time interval is = " << elapsed
345 << ", previous remainder is = " << remainder );
347 // Calculate frame rate average
348 #ifdef FANCY_FRAME_COUNTER
349 /* old fps calculation */
353 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
354 tmp = general.get_frame(i);
356 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
357 general.set_frame(i+1,tmp);
359 tmp = 1000000.0 / (float)elapsed;
360 general.set_frame(0,tmp);
361 // printf("frame[0] = %.2f\n", general.frames[0]);
363 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
364 // printf("ave = %.2f\n", general.frame_rate);
367 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
368 general.set_frame_rate( frames );
369 fgSetInt("/sim/frame-rate", frames);
370 SG_LOG( SG_ALL, SG_DEBUG,
371 "--> Frame rate is = " << general.get_frame_rate() );
374 last_time = t->get_cur_time();
379 if (fgGetBool("/sim/ATC/enabled"))
380 globals->get_ATC_mgr()->update(delta_time_sec);
382 // Run the AI subsystem
383 if (fgGetBool("/sim/ai-traffic/enabled"))
384 globals->get_AI_mgr()->update(delta_time_sec);
387 // Update any multiplayer models
388 globals->get_multiplayer_rx_mgr()->Update();
393 // Calculate model iterations needed for next frame
394 elapsed += remainder;
396 global_multi_loop = (long)(((double)elapsed * 0.000001) * model_hz );
397 remainder = elapsed - ( (global_multi_loop*1000000) / model_hz );
398 SG_LOG( SG_ALL, SG_DEBUG,
399 "Model iterations needed = " << global_multi_loop
400 << ", new remainder = " << remainder );
402 // chop max interations to something reasonable if the sim was
403 // delayed for an excesive amount of time
404 if ( global_multi_loop > 2.0 * model_hz ) {
405 global_multi_loop = (int)(2.0 * model_hz );
409 bool scenery_loaded = fgGetBool("sim/sceneryloaded") || fgGetBool("sim/sceneryloaded-override");
412 if ( global_multi_loop > 0) {
413 // first run the flight model each frame until it is intialized
414 // then continue running each frame only after initial scenery load is complete.
415 if (!cur_fdm_state->get_inited() || scenery_loaded) {
416 fgUpdateTimeDepCalcs();
419 SG_LOG( SG_ALL, SG_DEBUG,
420 "Elapsed time is zero ... we're zinging" );
423 // Do any I/O channel work that might need to be done
424 globals->get_io()->update( real_delta_time_sec );
426 // see if we need to load any deferred-load textures
427 globals->get_matlib()->load_next_deferred();
429 // Run audio scheduler
430 #ifdef ENABLE_AUDIO_SUPPORT
431 if ( globals->get_soundmgr()->is_working() ) {
432 globals->get_soundmgr()->update( delta_time_sec );
436 globals->get_subsystem_mgr()->update(delta_time_sec);
439 // Tile Manager updates - see if we need to load any new scenery tiles.
440 // this code ties together the fdm, viewer and scenery classes...
441 // we may want to move this to it's own class at some point
443 double visibility_meters = fgGetDouble("/environment/visibility-m");
444 FGViewer *current_view = globals->get_current_view();
446 // get the location data for the primary FDM (now hardcoded to ac model)...
447 SGLocation *acmodel_loc = NULL;
448 acmodel_loc = (SGLocation *)globals->
449 get_aircraft_model()->get3DModel()->getSGLocation();
451 // update tile manager for FDM...
452 // ...only if location is different than the current-view location
453 // (to avoid duplicating effort)
454 if( !fgGetBool("/sim/current-view/config/from-model") ) {
455 if( acmodel_loc != NULL ) {
456 globals->get_tile_mgr()->prep_ssg_nodes( acmodel_loc,
458 globals->get_tile_mgr()->
459 update( acmodel_loc, visibility_meters,
461 get_absolute_view_pos(globals->
462 get_scenery()->get_center()) );
463 // save results of update in SGLocation for fdm...
464 if ( globals->get_scenery()->get_cur_elev() > -9990 ) {
466 set_cur_elev_m( globals->get_scenery()->get_cur_elev() );
467 fgSetDouble("/position/ground-elev-m",
468 globals->get_scenery()->get_cur_elev());
471 set_tile_center( globals->get_scenery()->get_next_center() );
475 globals->get_tile_mgr()->prep_ssg_nodes( current_view->getSGLocation(),
477 // update tile manager for view...
478 // IMPORTANT!!! the tilemgr update for view location _must_ be
479 // done last after the FDM's until all of Flight Gear code
480 // references the viewer's location for elevation instead of the
481 // "scenery's" current elevation.
482 SGLocation *view_location = globals->get_current_view()->getSGLocation();
483 globals->get_tile_mgr()->update( view_location, visibility_meters,
484 current_view->get_absolute_view_pos() );
485 // save results of update in SGLocation for fdm...
486 if ( globals->get_scenery()->get_cur_elev() > -9990 ) {
487 current_view->getSGLocation()->
488 set_cur_elev_m( globals->get_scenery()->get_cur_elev() );
490 current_view->getSGLocation()->
491 set_tile_center( globals->get_scenery()->get_next_center() );
493 #ifdef ENABLE_AUDIO_SUPPORT
494 // Right now we make a simplifying assumption that the primary
495 // aircraft is the source of all sounds and that all sounds are
496 // positioned relative to the current view position.
498 static sgVec3 last_pos_offset;
500 // set positional offset for sources
501 sgVec3 source_pos_offset;
502 sgSubVec3( source_pos_offset,
503 view_location->get_view_pos(), acmodel_loc->get_view_pos() );
504 // cout << "pos all = " << source_pos_offset[0] << " " << source_pos_offset[1] << " " << source_pos_offset[2] << endl;
505 globals->get_soundmgr()->set_source_pos_all( source_pos_offset );
509 sgSubVec3( source_vel, source_pos_offset, last_pos_offset );
510 sgScaleVec3( source_vel, delta_time_sec );
511 sgCopyVec3( last_pos_offset, source_pos_offset );
512 // cout << "vel = " << source_vel[0] << " " << source_vel[1] << " " << source_vel[2] << endl;
513 globals->get_soundmgr()->set_source_vel_all( source_vel );
515 // Right now we make a simplifying assumption that the listener is
516 // always positioned at the origin.
518 sgSetVec3( listener_pos, 0.0, 0.0, 0.0 );
519 // cout << "listener = " << listener_pos[0] << " " << listener_pos[1] << " " << listener_pos[2] << endl;
520 globals->get_soundmgr()->set_listener_pos( listener_pos );
523 // If fdm location is same as viewer's then we didn't do the
524 // update for fdm location above so we need to save the viewer
525 // results in the fdm SGLocation as well...
526 if( fgGetBool("/sim/current-view/config/from-model") ) {
527 if( acmodel_loc != 0 ) {
528 if ( globals->get_scenery()->get_cur_elev() > -9990 ) {
529 acmodel_loc->set_cur_elev_m( globals->get_scenery()->
531 fgSetDouble("/position/ground-elev-m",
532 globals->get_scenery()->get_cur_elev());
534 acmodel_loc->set_tile_center( globals->get_scenery()->
539 // END Tile Manager udpates
541 if (!scenery_loaded && globals->get_tile_mgr()->all_queues_empty() && cur_fdm_state->get_inited()) {
542 fgSetBool("sim/sceneryloaded",true);
545 if (fgGetBool("/sim/rendering/specular-highlight")) {
546 glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
547 // glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
549 glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SINGLE_COLOR);
550 // glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_FALSE);
555 SG_LOG( SG_ALL, SG_DEBUG, "" );
559 // This is the top level master main function that is registered as
562 // The first few passes take care of initialization things (a couple
563 // per pass) and once everything has been initialized fgMainLoop from
566 static void fgIdleFunction ( void ) {
567 // printf("idle state == %d\n", idle_state);
569 if ( idle_state == 0 ) {
570 fgSetBool("sim/initialised", false);
572 // Initialize the splash screen right away
573 if ( fgGetBool("/sim/startup/splash-screen") ) {
574 fgSplashInit(fgGetString("/sim/startup/splash-texture"));
578 } else if ( idle_state == 1 ) {
579 // Initialize audio support
580 #ifdef ENABLE_AUDIO_SUPPORT
582 // Start the intro music
583 if ( fgGetBool("/sim/startup/intro-music") ) {
584 SGPath mp3file( globals->get_fg_root() );
585 mp3file.append( "Sounds/intro.mp3" );
587 SG_LOG( SG_GENERAL, SG_INFO,
588 "Starting intro music: " << mp3file.str() );
590 #if defined( __CYGWIN__ )
591 string command = "start /m `cygpath -w " + mp3file.str() + "`";
592 #elif defined( WIN32 )
593 string command = "start /m " + mp3file.str();
595 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
598 system ( command.c_str() );
603 } else if ( idle_state == 2 ) {
604 // These are a few miscellaneous things that aren't really
605 // "subsystems" but still need to be initialized.
608 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
609 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
614 } else if ( idle_state == 3 ) {
615 // This is the top level init routine which calls all the
616 // other subsystem initialization routines. If you are adding
617 // a subsystem to flightgear, its initialization call should
618 // located in this routine.
619 if( !fgInitSubsystems()) {
620 SG_LOG( SG_GENERAL, SG_ALERT,
621 "Subsystem initializations failed ..." );
626 } else if ( idle_state == 4 ) {
627 // Initialize the time offset (warp) after fgInitSubsystem
628 // (which initializes the lighting interpolation tables.)
631 // setup OpenGL view parameters
632 globals->get_renderer()->init();
634 // Read the list of available aircrafts
638 } else if ( idle_state == 5 ) {
641 } else if ( idle_state == 6 ) {
646 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
647 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
648 fgGetInt("/sim/startup/ysize") );
652 if ( idle_state == 1000 ) {
653 // We've finished all our initialization steps, from now on we
654 // run the main loop.
655 fgSetBool("sim/initialised",true);
656 fgSetBool("sim/sceneryloaded",false);
658 fgRegisterIdleHandler(fgMainLoop);
660 if ( fgGetBool("/sim/startup/splash-screen") ) {
661 fgSplashUpdate(0.0, 1.0);
667 // Main top level initialization
668 bool fgMainInit( int argc, char **argv ) {
670 #if defined( macintosh )
671 freopen ("stdout.txt", "w", stdout );
672 freopen ("stderr.txt", "w", stderr );
673 argc = ccommand( &argv );
676 // set default log levels
677 sglog().setLogLevels( SG_ALL, SG_ALERT );
680 #ifdef FLIGHTGEAR_VERSION
681 version = FLIGHTGEAR_VERSION;
683 version = "unknown version";
685 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
687 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
689 // Allocate global data structures. This needs to happen before
690 // we parse command line options
692 globals = new FGGlobals;
694 // seed the random number generater
697 FGControls *controls = new FGControls;
698 globals->set_controls( controls );
700 string_list *col = new string_list;
701 globals->set_channel_options_list( col );
703 // Scan the config file(s) and command line options to see if
704 // fg_root was specified (ignore all other options for now)
705 fgInitFGRoot(argc, argv);
707 // Check for the correct base package version
708 static char required_version[] = "0.9.6";
709 string base_version = fgBasePackageVersion();
710 if ( !(base_version == required_version) ) {
711 // tell the operator how to use this application
713 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
714 cerr << endl << "Base package check failed ... " \
715 << "Found version " << base_version << " at: " \
716 << globals->get_fg_root() << endl;
717 cerr << "Please upgrade to version: " << required_version << endl;
719 cerr << "Hit a key to continue..." << endl;
725 // Initialize the Aircraft directory to "" (UIUC)
728 // Load the configuration parameters. (Command line options
729 // overrides config file options. Config file options override
731 if ( !fgInitConfig(argc, argv) ) {
732 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
736 // Initialize the Window/Graphics environment.
737 #if !defined(__APPLE__) || defined(OSX_BUNDLE)
738 // Mac OS X command line ("non-bundle") applications call this
739 // from main(), in bootstrap.cxx. Andy doesn't know why, someone
740 // feel free to add comments...
741 fgOSInit(&argc, argv);
745 fgRegisterWindowResizeHandler( FGRenderer::resize );
746 fgRegisterIdleHandler( fgIdleFunction );
747 fgRegisterDrawHandler( FGRenderer::update );
749 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
750 bool get_stencil_buffer = true;
752 bool get_stencil_buffer = false;
755 // Clouds3D requires an alpha channel
756 // clouds may require stencil buffer
757 fgOSOpenWindow( fgGetInt("/sim/startup/xsize"),
758 fgGetInt("/sim/startup/ysize"),
759 fgGetInt("/sim/rendering/bits-per-pixel"),
760 fgGetBool("/sim/rendering/clouds3d"),
762 fgGetBool("/sim/startup/fullscreen") );
764 // This seems to be the absolute earliest in the init sequence
765 // that these calls will return valid info. Too bad it's after
766 // we've already created and sized out window. :-(
767 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
768 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
769 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
770 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
773 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
774 general.set_glMaxTexSize( tmp );
775 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
777 glGetIntegerv( GL_DEPTH_BITS, &tmp );
778 general.set_glDepthBits( tmp );
779 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
781 // Initialize plib net interface
782 netInit( &argc, argv );
784 // Initialize ssg (from plib). Needs to come before we do any
785 // other ssg stuff, but after opengl has been initialized.
788 // Initialize the user interface (we need to do this before
789 // passing off control to the OS main loop and before
790 // fgInitGeneral to get our fonts !!!
793 // Read the list of available aircrafts
796 #ifdef GL_EXT_texture_lod_bias
797 glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, -0.5 ) ;
800 // get the address of our OpenGL extensions
801 if ( fgGetBool("/sim/rendering/distance-attenuation") )
803 if (SGIsOpenGLExtensionSupported("GL_EXT_point_parameters") ) {
804 glPointParameterIsSupported = true;
805 glPointParameterfPtr = (glPointParameterfProc)
806 SGLookupFunction("glPointParameterfEXT");
807 glPointParameterfvPtr = (glPointParameterfvProc)
808 SGLookupFunction("glPointParameterfvEXT");
810 } else if ( SGIsOpenGLExtensionSupported("GL_ARB_point_parameters") ) {
811 glPointParameterIsSupported = true;
812 glPointParameterfPtr = (glPointParameterfProc)
813 SGLookupFunction("glPointParameterfARB");
814 glPointParameterfvPtr = (glPointParameterfvProc)
815 SGLookupFunction("glPointParameterfvARB");
817 glPointParameterIsSupported = false;
820 // based on the requested presets, calculate the true starting
825 SGTime *t = fgInitTime();
826 globals->set_time_params( t );
828 // Do some quick general initializations
829 if( !fgInitGeneral()) {
830 SG_LOG( SG_GENERAL, SG_ALERT,
831 "General initializations failed ..." );
835 ////////////////////////////////////////////////////////////////////
836 // Initialize the property-based built-in commands
837 ////////////////////////////////////////////////////////////////////
840 ////////////////////////////////////////////////////////////////////
841 // Initialize the material manager
842 ////////////////////////////////////////////////////////////////////
843 globals->set_matlib( new SGMaterialLib );
845 globals->set_model_lib(new SGModelLib);
847 ////////////////////////////////////////////////////////////////////
848 // Initialize the TG scenery subsystem.
849 ////////////////////////////////////////////////////////////////////
850 globals->set_scenery( new FGScenery );
851 globals->get_scenery()->init();
852 globals->get_scenery()->bind();
853 globals->set_tile_mgr( new FGTileMgr );
855 ////////////////////////////////////////////////////////////////////
856 // Initialize the general model subsystem.
857 ////////////////////////////////////////////////////////////////////
858 globals->set_model_mgr(new FGModelMgr);
859 globals->get_model_mgr()->init();
860 globals->get_model_mgr()->bind();
862 ////////////////////////////////////////////////////////////////////
863 // Initialize the 3D aircraft model subsystem (has a dependency on
864 // the scenery subsystem.)
865 ////////////////////////////////////////////////////////////////////
866 globals->set_aircraft_model(new FGAircraftModel);
867 globals->get_aircraft_model()->init();
868 globals->get_aircraft_model()->bind();
870 ////////////////////////////////////////////////////////////////////
871 // Initialize the view manager subsystem.
872 ////////////////////////////////////////////////////////////////////
873 FGViewMgr *viewmgr = new FGViewMgr;
874 globals->set_viewmgr( viewmgr );
879 // Initialize the sky
880 SGPath ephem_data_path( globals->get_fg_root() );
881 ephem_data_path.append( "Astro" );
882 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
883 ephem->update( globals->get_time_params()->getMjd(),
884 globals->get_time_params()->getLst(),
886 globals->set_ephem( ephem );
888 // TODO: move to environment mgr
890 SGPath texture_path(globals->get_fg_root());
891 texture_path.append("Textures");
892 texture_path.append("Sky");
893 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
894 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
895 thesky->add_cloud_layer(layer);
898 SGPath sky_tex_path( globals->get_fg_root() );
899 sky_tex_path.append( "Textures" );
900 sky_tex_path.append( "Sky" );
901 thesky->texture_path( sky_tex_path.str() );
903 // The sun and moon diameters are scaled down numbers of the
904 // actual diameters. This was needed to fit bot the sun and the
905 // moon within the distance to the far clip plane.
906 // Moon diameter: 3,476 kilometers
907 // Sun diameter: 1,390,000 kilometers
908 thesky->build( 80000.0, 80000.0,
910 globals->get_ephem()->getNumPlanets(),
911 globals->get_ephem()->getPlanets(),
912 globals->get_ephem()->getNumStars(),
913 globals->get_ephem()->getStars() );
915 // Initialize MagVar model
916 SGMagVar *magvar = new SGMagVar();
917 globals->set_mag( magvar );
920 // kludge to initialize mag compass
921 // (should only be done for in-flight
923 // update magvar model
924 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
925 * SGD_DEGREES_TO_RADIANS,
926 fgGetDouble("/position/latitude-deg")
927 * SGD_DEGREES_TO_RADIANS,
928 fgGetDouble("/position/altitude-ft")
930 globals->get_time_params()->getJD() );
931 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
932 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
934 // airport = new ssgBranch;
935 // airport->setName( "Airport Lighting" );
936 // lighting->addKid( airport );
938 // build our custom render states
939 globals->get_renderer()->build_states();
942 // pass control off to the master event handler
945 SG_LOG( SG_ALL, SG_ALERT,
946 "Unknown exception in the main loop. Aborting..." );
949 // we never actually get here ... but to avoid compiler warnings,