2 // fg_init.cxx -- Flight Gear top level initialization routines
4 // Written by Curtis Olson, started August 1997.
6 // Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
8 // This program is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU General Public License as
10 // published by the Free Software Foundation; either version 2 of the
11 // License, or (at your option) any later version.
13 // This program is distributed in the hope that it will be useful, but
14 // WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 // (Log is kept at end of this file)
37 // work around a stdc++ lib bug in some versions of linux, but doesn't
38 // seem to hurt to have this here for all versions of Linux.
40 # define _G_NO_EXTERN_TEMPLATES
43 #include <Include/compiler.h>
47 #include <Debug/logstream.hxx>
48 #include <Aircraft/aircraft.hxx>
49 #include <Airports/simple.hxx>
50 #include <Astro/sky.hxx>
51 #include <Astro/stars.hxx>
52 #include <Astro/solarsystem.hxx>
53 #include <Autopilot/autopilot.hxx>
54 #include <Cockpit/cockpit.hxx>
55 #include <Include/fg_constants.h>
56 #include <Include/general.hxx>
57 #include <Joystick/joystick.hxx>
58 #include <Math/fg_geodesy.hxx>
59 #include <Math/point3d.hxx>
60 #include <Math/polar3d.hxx>
61 #include <Scenery/scenery.hxx>
62 #include <Scenery/tilemgr.hxx>
63 #include <Time/event.hxx>
64 #include <Time/fg_time.hxx>
65 #include <Time/light.hxx>
66 #include <Time/sunpos.hxx>
67 #include <Time/moonpos.hxx>
68 #include <Weather/weather.hxx>
70 #include "fg_init.hxx"
71 #include "options.hxx"
73 #include "fg_serial.hxx"
75 #if defined(FX) && defined(XMESA)
81 extern const char *default_root;
84 // Set initial position and orientation
85 int fgInitPosition( void ) {
89 f = current_aircraft.fdm_state;
91 id = current_options.get_airport_id();
93 // set initial position from airport id
98 FG_LOG( FG_GENERAL, FG_INFO,
99 "Attempting to set starting position from airport code "
102 airports.load("apt_simple");
103 if ( ! airports.search( id, &a ) ) {
104 FG_LOG( FG_GENERAL, FG_ALERT,
105 "Failed to find " << id << " in database." );
108 f->set_Longitude( a.longitude * DEG_TO_RAD );
109 f->set_Latitude( a.latitude * DEG_TO_RAD );
112 // set initial position from default or command line coordinates
114 f->set_Longitude( current_options.get_lon() * DEG_TO_RAD );
115 f->set_Latitude( current_options.get_lat() * DEG_TO_RAD );
118 f->set_sin_cos_longitude(current_options.get_lon() * DEG_TO_RAD);
119 f->set_sin_cos_latitude(current_options.get_lat() * DEG_TO_RAD);
121 FG_LOG( FG_GENERAL, FG_INFO,
122 "starting altitude is = " << current_options.get_altitude() );
124 f->set_Altitude( current_options.get_altitude() * METER_TO_FEET );
125 fgFDMSetGroundElevation( current_options.get_flight_model(),
126 (f->get_Altitude() - 3.758099) * FEET_TO_METER );
128 FG_LOG( FG_GENERAL, FG_INFO,
129 "Initial position is: ("
130 << (f->get_Longitude() * RAD_TO_DEG) << ", "
131 << (f->get_Latitude() * RAD_TO_DEG) << ", "
132 << (f->get_Altitude() * FEET_TO_METER) << ")" );
138 // General house keeping initializations
139 int fgInitGeneral( void ) {
141 char *mesa_win_state;
143 FG_LOG( FG_GENERAL, FG_INFO, "General Initialization" );
144 FG_LOG( FG_GENERAL, FG_INFO, "======= ==============" );
146 root = current_options.get_fg_root();
147 if ( ! root.length() ) {
148 // No root path set? Then bail ...
149 FG_LOG( FG_GENERAL, FG_ALERT,
150 "Cannot continue without environment variable FG_ROOT"
151 << "being defined." );
154 FG_LOG( FG_GENERAL, FG_INFO, "FG_ROOT = " << root << endl );
156 #if defined(FX) && defined(XMESA)
157 // initialize full screen flag
158 global_fullscreen = false;
159 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
160 // Test for the MESA_GLX_FX env variable
161 if ( (mesa_win_state = getenv( "MESA_GLX_FX" )) != NULL) {
162 // test if we are fullscreen mesa/glide
163 if ( (mesa_win_state[0] == 'f') ||
164 (mesa_win_state[0] == 'F') ) {
165 global_fullscreen = true;
175 // This is the top level init routine which calls all the other
176 // initialization routines. If you are adding a subsystem to flight
177 // gear, its initialization call should located in this routine.
178 // Returns non-zero if a problem encountered.
179 int fgInitSubsystems( void )
181 FGInterface *f; // assigned later
182 fgLIGHT *l = &cur_light_params;
183 fgTIME *t = &cur_time_params;
184 FGView *v = ¤t_view;
186 FG_LOG( FG_GENERAL, FG_INFO, "Initialize Subsystems");
187 FG_LOG( FG_GENERAL, FG_INFO, "========== ==========");
189 // allocates structures so must happen before any of the flight
190 // model or control parameters are set
191 fgAircraftInit(); // In the future this might not be the case.
192 f = current_aircraft.fdm_state;
194 // set the initial position
197 // Initialize the Scenery Management subsystem
198 if ( fgSceneryInit() ) {
199 // Scenery initialized ok.
201 FG_LOG( FG_GENERAL, FG_ALERT, "Error in Scenery initialization!" );
205 if( fgTileMgrInit() ) {
206 // Load the local scenery data
209 FG_LOG( FG_GENERAL, FG_ALERT, "Error in Tile Manager initialization!" );
213 FG_LOG( FG_GENERAL, FG_DEBUG,
214 "Current terrain elevation after tile mgr init " <<
217 // Calculate ground elevation at starting point (we didn't have
218 // tmp_abs_view_pos calculated when fgTileMgrUpdate() was called above
220 // calculalate a cartesian point somewhere along the line between
221 // the center of the earth and our view position. Doesn't have to
222 // be the exact elevation (this is good because we don't know it
225 // now handled inside of the fgTileMgrUpdate()
228 geod_pos = Point3D( f->get_Longitude(), f->get_Latitude(), 0.0);
229 tmp_abs_view_pos = fgGeodToCart(geod_pos);
231 FG_LOG( FG_GENERAL, FG_DEBUG,
232 "Initial abs_view_pos = " << tmp_abs_view_pos );
234 fgTileMgrCurElev( f->get_Longitude(), f->get_Latitude(),
236 FG_LOG( FG_GENERAL, FG_DEBUG,
237 "Altitude after update " << scenery.cur_elev );
240 fgFDMSetGroundElevation( current_options.get_flight_model(),
243 // Reset our altitude if we are below ground
244 FG_LOG( FG_GENERAL, FG_DEBUG, "Current altitude = " << f->get_Altitude() );
245 FG_LOG( FG_GENERAL, FG_DEBUG, "Current runway altitude = " <<
246 f->get_Runway_altitude() );
248 if ( f->get_Altitude() < f->get_Runway_altitude() + 3.758099) {
249 f->set_Altitude( f->get_Runway_altitude() + 3.758099 );
252 FG_LOG( FG_GENERAL, FG_INFO,
253 "Updated position (after elevation adj): ("
254 << (f->get_Latitude() * RAD_TO_DEG) << ", "
255 << (f->get_Longitude() * RAD_TO_DEG) << ", "
256 << (f->get_Altitude() * FEET_TO_METER) << ")" );
258 // We need to calculate a few more values here that would normally
259 // be calculated by the FDM so that the v->UpdateViewMath()
260 // routine doesn't get hosed.
262 double sea_level_radius_meters;
264 // Set the FG variables first
265 fgGeodToGeoc( f->get_Latitude(), f->get_Altitude(),
266 &sea_level_radius_meters, &lat_geoc);
267 f->set_Geocentric_Position( lat_geoc, f->get_Longitude(),
269 (sea_level_radius_meters * METER_TO_FEET) );
270 f->set_Sea_level_radius( sea_level_radius_meters * METER_TO_FEET );
272 // The following section sets up the flight model EOM parameters
273 // and should really be read in from one or more files.
276 f->set_Velocities_Local( 0.0, 0.0, 0.0 );
278 // Initial Orientation
279 f->set_Euler_Angles( current_options.get_roll() * DEG_TO_RAD,
280 current_options.get_pitch() * DEG_TO_RAD,
281 current_options.get_heading() * DEG_TO_RAD );
283 // Initial Angular Body rates
284 f->set_Omega_Body( 7.206685E-05, 0.0, 9.492658E-05 );
286 f->set_Earth_position_angle( 0.0 );
288 // Mass properties and geometry values
289 f->set_Inertias( 8.547270E+01,
290 1.048000E+03, 3.000000E+03, 3.530000E+03, 0.000000E+00 );
292 // CG position w.r.t. ref. point
293 f->set_CG_Position( 0.0, 0.0, 0.0 );
295 // Initialize the event manager
296 global_events.Init();
298 // Output event stats every 60 seconds
299 global_events.Register( "fgEVENT_MGR::PrintStats()",
300 fgMethodCallback<fgEVENT_MGR>( &global_events,
301 &fgEVENT_MGR::PrintStats),
302 fgEVENT::FG_EVENT_READY, 60000 );
304 // Initialize the time dependent variables
308 // Initialize view parameters
309 FG_LOG( FG_GENERAL, FG_DEBUG, "Before v->init()");
311 FG_LOG( FG_GENERAL, FG_DEBUG, "After v->init()");
312 v->UpdateViewMath(f);
313 FG_LOG( FG_GENERAL, FG_DEBUG, " abs_view_pos = " << v->get_abs_view_pos());
314 v->UpdateWorldToEye(f);
316 // Build the solar system
317 //fgSolarSystemInit(*t);
318 FG_LOG(FG_GENERAL, FG_INFO, "Building SolarSystem");
319 SolarSystem::theSolarSystem = new SolarSystem(t);
321 // Initialize the Stars subsystem
322 if( fgStarsInit() ) {
323 // Stars initialized ok.
325 FG_LOG( FG_GENERAL, FG_ALERT, "Error in Stars initialization!" );
329 // Initialize the planetary subsystem
330 // global_events.Register( "fgPlanetsInit()", fgPlanetsInit,
331 // fgEVENT::FG_EVENT_READY, 600000);
333 // Initialize the sun's position
334 // global_events.Register( "fgSunInit()", fgSunInit,
335 // fgEVENT::FG_EVENT_READY, 30000 );
337 // Intialize the moon's position
338 // global_events.Register( "fgMoonInit()", fgMoonInit,
339 // fgEVENT::FG_EVENT_READY, 600000 );
341 // register the periodic update of Sun, moon, and planets
342 global_events.Register( "ssolsysUpdate", solarSystemRebuild,
343 fgEVENT::FG_EVENT_READY, 600000);
345 // fgUpdateSunPos() needs a few position and view parameters set
346 // so it can calculate local relative sun angle and a few other
347 // things for correctly orienting the sky.
350 global_events.Register( "fgUpdateSunPos()", fgUpdateSunPos,
351 fgEVENT::FG_EVENT_READY, 60000);
352 global_events.Register( "fgUpdateMoonPos()", fgUpdateMoonPos,
353 fgEVENT::FG_EVENT_READY, 60000);
355 // Initialize Lighting interpolation tables
358 // update the lighting parameters (based on sun angle)
359 global_events.Register( "fgLight::Update()",
360 fgMethodCallback<fgLIGHT>( &cur_light_params,
362 fgEVENT::FG_EVENT_READY, 30000 );
364 // Initialize the weather modeling subsystem
365 current_weather.Init();
367 // Initialize the Cockpit subsystem
368 if( fgCockpitInit( ¤t_aircraft )) {
369 // Cockpit initialized ok.
371 FG_LOG( FG_GENERAL, FG_ALERT, "Error in Cockpit initialization!" );
375 // Initialize the "sky"
378 // Initialize the flight model subsystem data structures base on
381 fgFDMInit( current_options.get_flight_model(), cur_fdm_state,
382 1.0 / DEFAULT_MODEL_HZ );
384 // I'm just sticking this here for now, it should probably move
386 scenery.cur_elev = f->get_Runway_altitude() * FEET_TO_METER;
388 if ( f->get_Altitude() < f->get_Runway_altitude() + 3.758099) {
389 f->set_Altitude( f->get_Runway_altitude() + 3.758099 );
392 FG_LOG( FG_GENERAL, FG_INFO,
393 "Updated position (after elevation adj): ("
394 << (f->get_Latitude() * RAD_TO_DEG) << ", "
395 << (f->get_Longitude() * RAD_TO_DEG) << ", "
396 << (f->get_Altitude() * FEET_TO_METER) << ")" );
397 // end of thing that I just stuck in that I should probably move
400 if ( fgJoystickInit() ) {
401 // Joystick initialized ok.
403 FG_LOG( FG_GENERAL, FG_ALERT, "Error in Joystick initialization!" );
406 // Autopilot init added here, by Jeff Goeke-Smith
407 fgAPInit(¤t_aircraft);
409 // Initialize serial ports
412 FG_LOG( FG_GENERAL, FG_INFO, endl);
419 // Revision 1.1 1999/04/05 21:32:47 curt
422 // Revision 1.72 1999/04/05 02:13:58 curt
423 // Minor patch from Norman Vine.
425 // Revision 1.71 1999/03/22 02:08:13 curt
426 // Changes contributed by Durk Talsma:
428 // Here's a few changes I made to fg-0.58 this weekend. Included are the
429 // following features:
430 // - Sun and moon have a halo
431 // - The moon has a light vector, moon_angle, etc. etc. so that we can have
432 // some moonlight during the night.
433 // - Lot's of small changes tweakes, including some stuff Norman Vine sent
436 // Revision 1.70 1999/03/11 23:09:49 curt
437 // When "Help" is selected from the menu check to see if netscape is running.
438 // If so, command it to go to the flight gear user guide url. Otherwise
439 // start a new version of netscape with this url.
441 // Revision 1.69 1999/03/08 21:56:39 curt
442 // Added panel changes sent in by Friedemann.
443 // Added a splash screen randomization since we have several nice splash screens.
445 // Revision 1.68 1999/03/02 01:03:15 curt
446 // Tweaks for building with native SGI compilers.
448 // Revision 1.67 1999/02/26 22:09:48 curt
449 // Added initial support for native SGI compilers.
451 // Revision 1.66 1999/02/05 21:29:10 curt
452 // Modifications to incorporate Jon S. Berndts flight model code.
454 // Revision 1.65 1999/02/02 20:13:36 curt
455 // MSVC++ portability changes by Bernie Bright:
457 // Lib/Serial/serial.[ch]xx: Initial Windows support - incomplete.
458 // Simulator/Astro/stars.cxx: typo? included <stdio> instead of <cstdio>
459 // Simulator/Cockpit/hud.cxx: Added Standard headers
460 // Simulator/Cockpit/panel.cxx: Redefinition of default parameter
461 // Simulator/Flight/flight.cxx: Replaced cout with FG_LOG. Deleted <stdio.h>
462 // Simulator/Main/fg_init.cxx:
463 // Simulator/Main/GLUTmain.cxx:
464 // Simulator/Main/options.hxx: Shuffled <fg_serial.hxx> dependency
465 // Simulator/Objects/material.hxx:
466 // Simulator/Time/timestamp.hxx: VC++ friend kludge
467 // Simulator/Scenery/tile.[ch]xx: Fixed using std::X declarations
468 // Simulator/Main/views.hxx: Added a constant
470 // Revision 1.64 1999/02/01 21:15:43 curt
471 // Removed unused variables.
473 // Revision 1.63 1999/01/27 04:49:19 curt
474 // Game mode fixes from Norman Vine.
475 // Initial altitude setting tweaks and fixes (especially for when starting
478 // Revision 1.62 1999/01/20 13:42:25 curt
479 // Tweaked FDM interface.
480 // Testing check sum support for NMEA serial output.
482 // Revision 1.61 1999/01/08 03:23:57 curt
483 // Beginning work on compensating for sim time vs. real world time "jitter".
485 // Revision 1.60 1999/01/07 20:25:09 curt
486 // Updated struct fgGENERAL to class FGGeneral.
488 // Revision 1.59 1998/12/18 23:40:57 curt
489 // New frame rate counting mechanism.
491 // Revision 1.58 1998/12/09 18:50:25 curt
492 // Converted "class fgVIEW" to "class FGView" and updated to make data
493 // members private and make required accessor functions.
495 // Revision 1.57 1998/12/06 14:52:56 curt
496 // Fixed a problem with the initial starting altitude. "v->abs_view_pos" wasn't
497 // being calculated correctly at the beginning causing the first terrain
498 // intersection to fail, returning a ground altitude of zero, causing the plane
499 // to free fall for one frame, until the ground altitude was corrected, but now
500 // being under the ground we got a big bounce and the plane always ended up
503 // Revision 1.56 1998/12/06 13:51:23 curt
504 // Turned "struct fgWEATHER" into "class FGWeather".
506 // Revision 1.55 1998/12/05 15:54:20 curt
507 // Renamed class fgFLIGHT to class FGState as per request by JSB.
509 // Revision 1.54 1998/12/05 14:19:53 curt
510 // Looking into a problem with cur_view_params.abs_view_pos initialization.
512 // Revision 1.53 1998/12/03 04:25:05 curt
513 // Working on fixing up new fgFLIGHT class.
515 // Revision 1.52 1998/12/03 01:17:17 curt
516 // Converted fgFLIGHT to a class.
518 // Revision 1.51 1998/11/20 01:02:37 curt
519 // Try to detect Mesa/Glide/Voodoo and chose the appropriate resolution.
521 // Revision 1.50 1998/11/16 14:00:01 curt
522 // Added pow() macro bug work around.
523 // Added support for starting FGFS at various resolutions.
524 // Added some initial serial port support.
525 // Specify default log levels in main().
527 // Revision 1.49 1998/11/11 00:24:02 curt
528 // Added Michael Johnson's audio patches for testing.
529 // Also did a few tweaks to avoid numerical problems when starting at a place
530 // with no (or bogus) scenery.
532 // Revision 1.48 1998/11/07 19:07:10 curt
533 // Enable release builds using the --without-logging option to the configure
534 // script. Also a couple log message cleanups, plus some C to C++ comment
537 // Revision 1.47 1998/11/06 21:18:10 curt
538 // Converted to new logstream debugging facility. This allows release
539 // builds with no messages at all (and no performance impact) by using
540 // the -DFG_NDEBUG flag.
542 // Revision 1.46 1998/10/27 02:14:38 curt
543 // Changes to support GLUT joystick routines as fall back.
545 // Revision 1.45 1998/10/25 10:57:21 curt
546 // Changes to use the new joystick library if it is available.
548 // Revision 1.44 1998/10/18 01:17:17 curt
551 // Revision 1.43 1998/10/17 01:34:22 curt
554 // Revision 1.42 1998/10/16 23:27:54 curt
557 // Revision 1.41 1998/10/16 00:54:01 curt
558 // Converted to Point3D class.
560 // Revision 1.40 1998/10/02 12:46:49 curt
561 // Added an "auto throttle"
563 // Revision 1.39 1998/09/29 02:03:39 curt
566 // Revision 1.38 1998/09/15 04:27:30 curt
567 // Changes for new Astro code.
569 // Revision 1.37 1998/09/15 02:09:26 curt
570 // Include/fg_callback.hxx
571 // Moved code inline to stop g++ 2.7 from complaining.
573 // Simulator/Time/event.[ch]xx
574 // Changed return type of fgEVENT::printStat(). void caused g++ 2.7 to
575 // complain bitterly.
577 // Minor bugfix and changes.
579 // Simulator/Main/GLUTmain.cxx
580 // Added missing type to idle_state definition - eliminates a warning.
582 // Simulator/Main/fg_init.cxx
583 // Changes to airport lookup.
585 // Simulator/Main/options.cxx
586 // Uses fg_gzifstream when loading config file.
588 // Revision 1.36 1998/09/08 21:40:08 curt
589 // Fixes by Charlie Hotchkiss.
591 // Revision 1.35 1998/08/29 13:09:26 curt
592 // Changes to event manager from Bernie Bright.
594 // Revision 1.34 1998/08/27 17:02:06 curt
595 // Contributions from Bernie Bright <bbright@c031.aone.net.au>
596 // - use strings for fg_root and airport_id and added methods to return
598 // - inlined all access methods,
599 // - made the parsing functions private methods,
600 // - deleted some unused functions.
601 // - propogated some of these changes out a bit further.
603 // Revision 1.33 1998/08/25 20:53:32 curt
604 // Shuffled $FG_ROOT file layout.
606 // Revision 1.32 1998/08/25 16:59:09 curt
607 // Directory reshuffling.
609 // Revision 1.31 1998/08/22 14:49:57 curt
610 // Attempting to iron out seg faults and crashes.
611 // Did some shuffling to fix a initialization order problem between view
612 // position, scenery elevation.
614 // Revision 1.30 1998/08/20 20:32:33 curt
615 // Reshuffled some of the code in and around views.[ch]xx
617 // Revision 1.29 1998/07/30 23:48:27 curt
618 // Output position & orientation when pausing.
619 // Eliminated libtool use.
620 // Added options to specify initial position and orientation.
621 // Changed default fov to 55 degrees.
622 // Added command line option to start in paused or unpaused state.
624 // Revision 1.28 1998/07/27 18:41:25 curt
625 // Added a pause command "p"
626 // Fixed some initialization order problems between pui and glut.
627 // Added an --enable/disable-sound option.
629 // Revision 1.27 1998/07/24 21:39:10 curt
630 // Debugging output tweaks.
631 // Cast glGetString to (char *) to avoid compiler errors.
632 // Optimizations to fgGluLookAt() by Norman Vine.
634 // Revision 1.26 1998/07/22 21:40:44 curt
635 // Clear to adjusted fog color (for sunrise/sunset effects)
636 // Make call to fog sunrise/sunset adjustment method.
637 // Add a stdc++ library bug work around to fg_init.cxx
639 // Revision 1.25 1998/07/13 21:01:38 curt
640 // Wrote access functions for current fgOPTIONS.
642 // Revision 1.24 1998/07/13 15:32:39 curt
643 // Clear color buffer if drawing wireframe.
644 // When specifying and airport, start elevation at -1000 and let the system
645 // position you at ground level.
647 // Revision 1.23 1998/07/12 03:14:43 curt
648 // Added ground collision detection.
649 // Did some serious horsing around to be able to "hug" the ground properly
650 // and still be able to take off.
651 // Set the near clip plane to 1.0 meters when less than 10 meters above the
653 // Did some serious horsing around getting the initial airplane position to be
654 // correct based on rendered terrain elevation.
655 // Added a little cheat/hack that will prevent the view position from ever
656 // dropping below the terrain, even when the flight model doesn't quite
657 // put you as high as you'd like.
659 // Revision 1.22 1998/07/04 00:52:25 curt
660 // Add my own version of gluLookAt() (which is nearly identical to the
661 // Mesa/glu version.) But, by calculating the Model View matrix our selves
662 // we can save this matrix without having to read it back in from the video
663 // card. This hopefully allows us to save a few cpu cycles when rendering
664 // out the fragments because we can just use glLoadMatrixd() with the
665 // precalculated matrix for each tile rather than doing a push(), translate(),
666 // pop() for every fragment.
668 // Panel status defaults to off for now until it gets a bit more developed.
670 // Extract OpenGL driver info on initialization.
672 // Revision 1.21 1998/06/27 16:54:33 curt
673 // Replaced "extern displayInstruments" with a entry in fgOPTIONS.
674 // Don't change the view port when displaying the panel.
676 // Revision 1.20 1998/06/17 21:35:12 curt
677 // Refined conditional audio support compilation.
678 // Moved texture parameter setup calls to ../Scenery/materials.cxx
679 // #include <string.h> before various STL includes.
680 // Make HUD default state be enabled.
682 // Revision 1.19 1998/06/08 17:57:05 curt
683 // Minor sound/startup position tweaks.
685 // Revision 1.18 1998/06/03 00:47:14 curt
686 // Updated to compile in audio support if OSS available.
687 // Updated for new version of Steve's audio library.
688 // STL includes don't use .h
689 // Small view optimizations.
691 // Revision 1.17 1998/06/01 17:54:42 curt
692 // Added Linux audio support.
693 // avoid glClear( COLOR_BUFFER_BIT ) when not using it to set the sky color.
696 // Revision 1.16 1998/05/29 20:37:24 curt
697 // Tweaked material properties & lighting a bit in GLUTmain.cxx.
698 // Read airport list into a "map" STL for dynamic list sizing and fast tree
701 // Revision 1.15 1998/05/22 21:28:53 curt
702 // Modifications to use the new fgEVENT_MGR class.
704 // Revision 1.14 1998/05/20 20:51:35 curt
705 // Tweaked smooth shaded texture lighting properties.
706 // Converted fgLIGHT to a C++ class.
708 // Revision 1.13 1998/05/16 13:08:35 curt
709 // C++ - ified views.[ch]xx
710 // Shuffled some additional view parameters into the fgVIEW class.
711 // Changed tile-radius to tile-diameter because it is a much better
713 // Added a WORLD_TO_EYE transformation to views.cxx. This allows us
714 // to transform world space to eye space for view frustum culling.
716 // Revision 1.12 1998/05/13 18:29:58 curt
717 // Added a keyboard binding to dynamically adjust field of view.
718 // Added a command line option to specify fov.
719 // Adjusted terrain color.
720 // Root path info moved to fgOPTIONS.
721 // Added ability to parse options out of a config file.
723 // Revision 1.11 1998/05/07 23:14:15 curt
724 // Added "D" key binding to set autopilot heading.
725 // Made frame rate calculation average out over last 10 frames.
726 // Borland C++ floating point exception workaround.
727 // Added a --tile-radius=n option.
729 // Revision 1.10 1998/05/06 03:16:24 curt
730 // Added an averaged global frame rate counter.
731 // Added an option to control tile radius.
733 // Revision 1.9 1998/05/03 00:47:31 curt
734 // Added an option to enable/disable full-screen mode.
736 // Revision 1.8 1998/04/30 12:34:18 curt
737 // Added command line rendering options:
738 // enable/disable fog/haze
739 // specify smooth/flat shading
740 // disable sky blending and just use a solid color
741 // enable wireframe drawing mode
743 // Revision 1.7 1998/04/28 01:20:22 curt
744 // Type-ified fgTIME and fgVIEW.
745 // Added a command line option to disable textures.
747 // Revision 1.6 1998/04/26 05:10:03 curt
748 // "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
750 // Revision 1.5 1998/04/25 22:06:30 curt
751 // Edited cvs log messages in source files ... bad bad bad!
753 // Revision 1.4 1998/04/25 20:24:01 curt
754 // Cleaned up initialization sequence to eliminate interdependencies
755 // between sun position, lighting, and view position. This creates a
756 // valid single pass initialization path.
758 // Revision 1.3 1998/04/25 15:11:11 curt
759 // Added an command line option to set starting position based on airport ID.
761 // Revision 1.2 1998/04/24 00:49:20 curt
762 // Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
763 // Trying out some different option parsing code.
764 // Some code reorganization.
766 // Revision 1.1 1998/04/22 13:25:44 curt
767 // C++ - ifing the code.
768 // Starting a bit of reorganization of lighting code.
770 // Revision 1.56 1998/04/18 04:11:28 curt
771 // Moved fg_debug to it's own library, added zlib support.
773 // Revision 1.55 1998/04/14 02:21:03 curt
774 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
775 // <jgoeke@voyager.net>
777 // Revision 1.54 1998/04/08 23:35:36 curt
778 // Tweaks to Gnu automake/autoconf system.
780 // Revision 1.53 1998/04/03 22:09:06 curt
781 // Converting to Gnu autoconf system.
783 // Revision 1.52 1998/03/23 21:24:38 curt
784 // Source code formating tweaks.
786 // Revision 1.51 1998/03/14 00:31:22 curt
787 // Beginning initial terrain texturing experiments.
789 // Revision 1.50 1998/03/09 22:46:19 curt
792 // Revision 1.49 1998/02/23 19:07:59 curt
793 // Incorporated Durk's Astro/ tweaks. Includes unifying the sun position
794 // calculation code between sun display, and other FG sections that use this
795 // for things like lighting.
797 // Revision 1.48 1998/02/21 14:53:15 curt
798 // Added Charlie's HUD changes.
800 // Revision 1.47 1998/02/19 13:05:53 curt
801 // Incorporated some HUD tweaks from Michelle America.
802 // Tweaked the sky's sunset/rise colors.
803 // Other misc. tweaks.
805 // Revision 1.46 1998/02/18 15:07:06 curt
806 // Tweaks to build with SGI OpenGL (and therefor hopefully other accelerated
807 // drivers will work.)
809 // Revision 1.45 1998/02/16 13:39:43 curt
810 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
811 // tiles to occasionally be missing.
813 // Revision 1.44 1998/02/12 21:59:50 curt
814 // Incorporated code changes contributed by Charlie Hotchkiss
815 // <chotchkiss@namg.us.anritsu.com>
817 // Revision 1.43 1998/02/11 02:50:40 curt
820 // Revision 1.42 1998/02/09 22:56:58 curt
821 // Removed "depend" files from cvs control. Other minor make tweaks.
823 // Revision 1.41 1998/02/09 15:07:50 curt
826 // Revision 1.40 1998/02/07 15:29:44 curt
827 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
828 // <chotchkiss@namg.us.anritsu.com>
830 // Revision 1.39 1998/02/03 23:20:25 curt
831 // Lots of little tweaks to fix various consistency problems discovered by
832 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
833 // passed arguments along to the real printf(). Also incorporated HUD changes
834 // by Michele America.
836 // Revision 1.38 1998/02/02 20:53:58 curt
837 // Incorporated Durk's changes.
839 // Revision 1.37 1998/02/01 03:39:54 curt
842 // Revision 1.36 1998/01/31 00:43:13 curt
843 // Added MetroWorks patches from Carmen Volpe.
845 // Revision 1.35 1998/01/27 00:47:57 curt
846 // Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
847 // system and commandline/config file processing code.
849 // Revision 1.34 1998/01/22 02:59:37 curt
850 // Changed #ifdef FILE_H to #ifdef _FILE_H
852 // Revision 1.33 1998/01/21 21:11:34 curt
855 // Revision 1.32 1998/01/19 19:27:08 curt
856 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
857 // This should simplify things tremendously.
859 // Revision 1.31 1998/01/19 18:40:32 curt
860 // Tons of little changes to clean up the code and to remove fatal errors
861 // when building with the c++ compiler.
863 // Revision 1.30 1998/01/13 00:23:09 curt
864 // Initial changes to support loading and management of scenery tiles. Note,
865 // there's still a fair amount of work left to be done.
867 // Revision 1.29 1998/01/08 02:22:08 curt
868 // Beginning to integrate Tile management subsystem.
870 // Revision 1.28 1998/01/07 03:18:58 curt
871 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
873 // Revision 1.27 1998/01/05 18:44:35 curt
874 // Add an option to advance/decrease time from keyboard.
876 // Revision 1.26 1997/12/30 23:09:04 curt
877 // Tweaking initialization sequences.
879 // Revision 1.25 1997/12/30 22:22:33 curt
880 // Further integration of event manager.
882 // Revision 1.24 1997/12/30 20:47:44 curt
883 // Integrated new event manager with subsystem initializations.
885 // Revision 1.23 1997/12/30 16:36:50 curt
886 // Merged in Durk's changes ...
888 // Revision 1.22 1997/12/19 23:34:05 curt
889 // Lot's of tweaking with sky rendering and lighting.
891 // Revision 1.21 1997/12/19 16:45:00 curt
892 // Working on scene rendering order and options.
894 // Revision 1.20 1997/12/18 23:32:33 curt
895 // First stab at sky dome actually starting to look reasonable. :-)
897 // Revision 1.19 1997/12/17 23:13:36 curt
898 // Began working on rendering a sky.
900 // Revision 1.18 1997/12/15 23:54:49 curt
901 // Add xgl wrappers for debugging.
902 // Generate terrain normals on the fly.
904 // Revision 1.17 1997/12/15 20:59:09 curt
907 // Revision 1.16 1997/12/12 19:52:48 curt
908 // Working on lightling and material properties.
910 // Revision 1.15 1997/12/11 04:43:55 curt
911 // Fixed sun vector and lighting problems. I thing the moon is now lit
914 // Revision 1.14 1997/12/10 22:37:47 curt
915 // Prepended "fg" on the name of all global structures that didn't have it yet.
916 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
918 // Revision 1.13 1997/11/25 19:25:32 curt
919 // Changes to integrate Durk's moon/sun code updates + clean up.
921 // Revision 1.12 1997/11/15 18:16:35 curt
924 // Revision 1.11 1997/10/30 12:38:42 curt
925 // Working on new scenery subsystem.
927 // Revision 1.10 1997/10/25 03:24:23 curt
928 // Incorporated sun, moon, and star positioning code contributed by Durk Talsma.
930 // Revision 1.9 1997/09/23 00:29:39 curt
931 // Tweaks to get things to compile with gcc-win32.
933 // Revision 1.8 1997/09/22 14:44:20 curt
934 // Continuing to try to align stars correctly.
936 // Revision 1.7 1997/09/16 15:50:30 curt
937 // Working on star alignment and time issues.
939 // Revision 1.6 1997/09/05 14:17:30 curt
940 // More tweaking with stars.
942 // Revision 1.5 1997/09/04 02:17:36 curt
945 // Revision 1.4 1997/08/27 21:32:26 curt
946 // Restructured view calculation code. Added stars.
948 // Revision 1.3 1997/08/27 03:30:19 curt
949 // Changed naming scheme of basic shared structures.
951 // Revision 1.2 1997/08/25 20:27:23 curt
952 // Merged in initial HUD and Joystick code.
954 // Revision 1.1 1997/08/23 01:46:20 curt