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)
34 // work around a stdc++ lib bug in some versions of linux, but doesn't
35 // seem to hurt to have this here for all versions of Linux.
37 # define _G_NO_EXTERN_TEMPLATES
42 #include <Include/fg_constants.h>
43 #include <Include/general.h>
45 #include <Aircraft/aircraft.hxx>
46 #include <Airports/simple.hxx>
47 #include <Astro/sky.hxx>
48 #include <Astro/stars.hxx>
49 #include <Astro/solarsystem.hxx>
50 #include <Autopilot/autopilot.hxx>
51 #include <Cockpit/cockpit.hxx>
52 // #include <Debug/fg_debug.h>
53 #include <Debug/logstream.hxx>
54 #include <Joystick/joystick.hxx>
55 #include <Math/fg_geodesy.hxx>
56 #include <Math/fg_random.h>
57 #include <Math/point3d.hxx>
58 #include <Math/polar3d.hxx>
59 #include <Scenery/scenery.hxx>
60 #include <Scenery/tilemgr.hxx>
61 #include <Time/event.hxx>
62 #include <Time/fg_time.hxx>
63 #include <Time/light.hxx>
64 #include <Time/sunpos.hxx>
65 #include <Weather/weather.hxx>
67 #include "fg_init.hxx"
68 #include "options.hxx"
72 extern const char *default_root;
75 // Set initial position and orientation
76 int fgInitPosition( void ) {
80 f = current_aircraft.flight;
82 id = current_options.get_airport_id();
84 // set initial position from airport id
89 FG_LOG( FG_GENERAL, FG_INFO,
90 "Attempting to set starting position from airport code "
93 airports.load("apt_simple");
94 if ( ! airports.search( id, &a ) ) {
95 FG_LOG( FG_GENERAL, FG_ALERT,
96 "Failed to find " << id << " in database." );
99 f->set_Longitude( a.longitude * DEG_TO_RAD );
100 f->set_Latitude( a.latitude * DEG_TO_RAD );
103 // set initial position from default or command line coordinates
105 f->set_Longitude( current_options.get_lon() * DEG_TO_RAD );
106 f->set_Latitude( current_options.get_lat() * DEG_TO_RAD );
108 FG_LOG( FG_GENERAL, FG_INFO,
109 "starting altitude is = " << current_options.get_altitude() );
111 f->set_Altitude( current_options.get_altitude() * METER_TO_FEET );
112 f->set_Runway_altitude( f->get_Altitude() - 3.758099 );
114 FG_LOG( FG_GENERAL, FG_INFO,
115 "Initial position is: ("
116 << (f->get_Longitude() * RAD_TO_DEG) << ", "
117 << (f->get_Latitude() * RAD_TO_DEG) << ", "
118 << (f->get_Altitude() * FEET_TO_METER) << ")" );
124 // General house keeping initializations
125 int fgInitGeneral( void ) {
129 FG_LOG( FG_GENERAL, FG_INFO, "General Initialization" );
130 FG_LOG( FG_GENERAL, FG_INFO, "======= ==============" );
132 root = current_options.get_fg_root();
133 if ( ! root.length() ) {
134 // No root path set? Then bail ...
135 FG_LOG( FG_GENERAL, FG_ALERT,
136 "Cannot continue without environment variable FG_ROOT"
137 << "being defined." );
140 FG_LOG( FG_GENERAL, FG_INFO, "FG_ROOT = " << root << endl );
142 // prime the frame rate counter pump
143 for ( i = 0; i < FG_FRAME_RATE_HISTORY; i++ ) {
144 general.frames[i] = 0.0;
151 // This is the top level init routine which calls all the other
152 // initialization routines. If you are adding a subsystem to flight
153 // gear, its initialization call should located in this routine.
154 // Returns non-zero if a problem encountered.
155 int fgInitSubsystems( void )
161 Point3D geod_pos, abs_view_pos;
163 l = &cur_light_params;
164 t = &cur_time_params;
167 FG_LOG( FG_GENERAL, FG_INFO, "Initialize Subsystems");
168 FG_LOG( FG_GENERAL, FG_INFO, "========== ==========");
170 // seed the random number generater
173 // allocates structures so must happen before any of the flight
174 // model or control parameters are set
175 fgAircraftInit(); // In the future this might not be the case.
176 f = current_aircraft.flight;
178 // set the initial position
181 // Initialize the Scenery Management subsystem
182 if ( fgSceneryInit() ) {
183 // Scenery initialized ok.
185 FG_LOG( FG_GENERAL, FG_ALERT, "Error in Scenery initialization!" );
189 if( fgTileMgrInit() ) {
190 // Load the local scenery data
193 FG_LOG( FG_GENERAL, FG_ALERT, "Error in Tile Manager initialization!" );
197 // Calculate ground elevation at starting point (we didn't have
198 // abs_view_pos calculated when fgTileMgrUpdate() was called above
200 // calculalate a cartesian point somewhere along the line between
201 // the center of the earth and our view position. Doesn't have to
202 // be the exact elevation (this is good because we don't know it
204 geod_pos = Point3D( f->get_Longitude(), f->get_Latitude(), 0.0);
205 abs_view_pos = fgGeodToCart(geod_pos);
207 FG_LOG( FG_GENERAL, FG_DEBUG,
208 "Altitude before update " << scenery.cur_elev );
210 fgTileMgrCurElevOLD( f->get_Longitude(),
213 FG_LOG( FG_GENERAL, FG_DEBUG,
214 "Altitude after update " << scenery.cur_elev );
215 f->set_Runway_altitude( scenery.cur_elev * METER_TO_FEET );
217 // Reset our altitude if we are below ground
218 if ( f->get_Altitude() < f->get_Runway_altitude() + 3.758099) {
219 f->set_Altitude( f->get_Runway_altitude() + 3.758099 );
222 FG_LOG( FG_GENERAL, FG_INFO,
223 "Updated position (after elevation adj): ("
224 << (f->get_Latitude() * RAD_TO_DEG) << ", "
225 << (f->get_Longitude() * RAD_TO_DEG) << ", "
226 << (f->get_Altitude() * FEET_TO_METER) << ")" );
227 // end of thing that I just stuck in that I should probably move
229 // The following section sets up the flight model EOM parameters
230 // and should really be read in from one or more files.
233 f->set_Velocities_Local( 0.0, 0.0, 0.0 );
235 // Initial Orientation
236 f->set_Euler_Angles( current_options.get_roll() * DEG_TO_RAD,
237 current_options.get_pitch() * DEG_TO_RAD,
238 current_options.get_heading() * DEG_TO_RAD );
240 // Initial Angular Body rates
241 f->set_Omega_Body( 7.206685E-05, 0.0, 9.492658E-05 );
243 f->set_Earth_position_angle( 0.0 );
245 // Mass properties and geometry values
246 f->set_Inertias( 8.547270E+01,
247 1.048000E+03, 3.000000E+03, 3.530000E+03, 0.000000E+00 );
249 // CG position w.r.t. ref. point
250 f->set_CG_Position( 0.0, 0.0, 0.0 );
252 // Initialize the event manager
253 global_events.Init();
255 // Output event stats every 60 seconds
256 global_events.Register( "fgEVENT_MGR::PrintStats()",
257 fgMethodCallback<fgEVENT_MGR>( &global_events,
258 &fgEVENT_MGR::PrintStats),
259 fgEVENT::FG_EVENT_READY, 60000 );
261 // Initialize the time dependent variables
265 // Initialize view parameters
266 FG_LOG( FG_GENERAL, FG_DEBUG, "Before v->init()");
268 FG_LOG( FG_GENERAL, FG_DEBUG, "After v->init()");
269 v->UpdateViewMath(f);
270 FG_LOG( FG_GENERAL, FG_DEBUG, " abs_view_pos = " << v->abs_view_pos );
271 v->UpdateWorldToEye(f);
273 // Build the solar system
274 //fgSolarSystemInit(*t);
275 FG_LOG(FG_GENERAL, FG_INFO, "Building SolarSystem");
276 SolarSystem::theSolarSystem = new SolarSystem(t);
278 // Initialize the Stars subsystem
279 if( fgStarsInit() ) {
280 // Stars initialized ok.
282 FG_LOG( FG_GENERAL, FG_ALERT, "Error in Stars initialization!" );
286 // Initialize the planetary subsystem
287 // global_events.Register( "fgPlanetsInit()", fgPlanetsInit,
288 // fgEVENT::FG_EVENT_READY, 600000);
290 // Initialize the sun's position
291 // global_events.Register( "fgSunInit()", fgSunInit,
292 // fgEVENT::FG_EVENT_READY, 30000 );
294 // Intialize the moon's position
295 // global_events.Register( "fgMoonInit()", fgMoonInit,
296 // fgEVENT::FG_EVENT_READY, 600000 );
298 // register the periodic update of Sun, moon, and planets
299 global_events.Register( "ssolsysUpdate", solarSystemRebuild,
300 fgEVENT::FG_EVENT_READY, 600000);
302 // fgUpdateSunPos() needs a few position and view parameters set
303 // so it can calculate local relative sun angle and a few other
304 // things for correctly orienting the sky.
306 global_events.Register( "fgUpdateSunPos()", fgUpdateSunPos,
307 fgEVENT::FG_EVENT_READY, 60000);
309 // Initialize Lighting interpolation tables
312 // update the lighting parameters (based on sun angle)
313 global_events.Register( "fgLight::Update()",
314 fgMethodCallback<fgLIGHT>( &cur_light_params,
316 fgEVENT::FG_EVENT_READY, 30000 );
318 // Initialize the weather modeling subsystem
321 // Initialize the Cockpit subsystem
322 if( fgCockpitInit( ¤t_aircraft )) {
323 // Cockpit initialized ok.
325 FG_LOG( FG_GENERAL, FG_ALERT, "Error in Cockpit initialization!" );
329 // Initialize the "sky"
332 // Initialize the flight model subsystem data structures base on
335 fgFlightModelInit( current_options.get_flight_model(), cur_flight_params,
336 1.0 / DEFAULT_MODEL_HZ );
338 // I'm just sticking this here for now, it should probably move
340 scenery.cur_elev = f->get_Runway_altitude() * FEET_TO_METER;
342 if ( f->get_Altitude() < f->get_Runway_altitude() + 3.758099) {
343 f->set_Altitude( f->get_Runway_altitude() + 3.758099 );
346 FG_LOG( FG_GENERAL, FG_INFO,
347 "Updated position (after elevation adj): ("
348 << (f->get_Latitude() * RAD_TO_DEG) << ", "
349 << (f->get_Longitude() * RAD_TO_DEG) << ", "
350 << (f->get_Altitude() * FEET_TO_METER) << ")" );
351 // end of thing that I just stuck in that I should probably move
354 if ( fgJoystickInit() ) {
355 // Joystick initialized ok.
357 FG_LOG( FG_GENERAL, FG_ALERT, "Error in Joystick initialization!" );
360 // Autopilot init added here, by Jeff Goeke-Smith
361 fgAPInit(¤t_aircraft);
363 // Initialize serial ports
366 FG_LOG( FG_GENERAL, FG_INFO, endl);
373 // Revision 1.54 1998/12/05 14:19:53 curt
374 // Looking into a problem with cur_view_params.abs_view_pos initialization.
376 // Revision 1.53 1998/12/03 04:25:05 curt
377 // Working on fixing up new fgFLIGHT class.
379 // Revision 1.52 1998/12/03 01:17:17 curt
380 // Converted fgFLIGHT to a class.
382 // Revision 1.51 1998/11/20 01:02:37 curt
383 // Try to detect Mesa/Glide/Voodoo and chose the appropriate resolution.
385 // Revision 1.50 1998/11/16 14:00:01 curt
386 // Added pow() macro bug work around.
387 // Added support for starting FGFS at various resolutions.
388 // Added some initial serial port support.
389 // Specify default log levels in main().
391 // Revision 1.49 1998/11/11 00:24:02 curt
392 // Added Michael Johnson's audio patches for testing.
393 // Also did a few tweaks to avoid numerical problems when starting at a place
394 // with no (or bogus) scenery.
396 // Revision 1.48 1998/11/07 19:07:10 curt
397 // Enable release builds using the --without-logging option to the configure
398 // script. Also a couple log message cleanups, plus some C to C++ comment
401 // Revision 1.47 1998/11/06 21:18:10 curt
402 // Converted to new logstream debugging facility. This allows release
403 // builds with no messages at all (and no performance impact) by using
404 // the -DFG_NDEBUG flag.
406 // Revision 1.46 1998/10/27 02:14:38 curt
407 // Changes to support GLUT joystick routines as fall back.
409 // Revision 1.45 1998/10/25 10:57:21 curt
410 // Changes to use the new joystick library if it is available.
412 // Revision 1.44 1998/10/18 01:17:17 curt
415 // Revision 1.43 1998/10/17 01:34:22 curt
418 // Revision 1.42 1998/10/16 23:27:54 curt
421 // Revision 1.41 1998/10/16 00:54:01 curt
422 // Converted to Point3D class.
424 // Revision 1.40 1998/10/02 12:46:49 curt
425 // Added an "auto throttle"
427 // Revision 1.39 1998/09/29 02:03:39 curt
430 // Revision 1.38 1998/09/15 04:27:30 curt
431 // Changes for new Astro code.
433 // Revision 1.37 1998/09/15 02:09:26 curt
434 // Include/fg_callback.hxx
435 // Moved code inline to stop g++ 2.7 from complaining.
437 // Simulator/Time/event.[ch]xx
438 // Changed return type of fgEVENT::printStat(). void caused g++ 2.7 to
439 // complain bitterly.
441 // Minor bugfix and changes.
443 // Simulator/Main/GLUTmain.cxx
444 // Added missing type to idle_state definition - eliminates a warning.
446 // Simulator/Main/fg_init.cxx
447 // Changes to airport lookup.
449 // Simulator/Main/options.cxx
450 // Uses fg_gzifstream when loading config file.
452 // Revision 1.36 1998/09/08 21:40:08 curt
453 // Fixes by Charlie Hotchkiss.
455 // Revision 1.35 1998/08/29 13:09:26 curt
456 // Changes to event manager from Bernie Bright.
458 // Revision 1.34 1998/08/27 17:02:06 curt
459 // Contributions from Bernie Bright <bbright@c031.aone.net.au>
460 // - use strings for fg_root and airport_id and added methods to return
462 // - inlined all access methods,
463 // - made the parsing functions private methods,
464 // - deleted some unused functions.
465 // - propogated some of these changes out a bit further.
467 // Revision 1.33 1998/08/25 20:53:32 curt
468 // Shuffled $FG_ROOT file layout.
470 // Revision 1.32 1998/08/25 16:59:09 curt
471 // Directory reshuffling.
473 // Revision 1.31 1998/08/22 14:49:57 curt
474 // Attempting to iron out seg faults and crashes.
475 // Did some shuffling to fix a initialization order problem between view
476 // position, scenery elevation.
478 // Revision 1.30 1998/08/20 20:32:33 curt
479 // Reshuffled some of the code in and around views.[ch]xx
481 // Revision 1.29 1998/07/30 23:48:27 curt
482 // Output position & orientation when pausing.
483 // Eliminated libtool use.
484 // Added options to specify initial position and orientation.
485 // Changed default fov to 55 degrees.
486 // Added command line option to start in paused or unpaused state.
488 // Revision 1.28 1998/07/27 18:41:25 curt
489 // Added a pause command "p"
490 // Fixed some initialization order problems between pui and glut.
491 // Added an --enable/disable-sound option.
493 // Revision 1.27 1998/07/24 21:39:10 curt
494 // Debugging output tweaks.
495 // Cast glGetString to (char *) to avoid compiler errors.
496 // Optimizations to fgGluLookAt() by Norman Vine.
498 // Revision 1.26 1998/07/22 21:40:44 curt
499 // Clear to adjusted fog color (for sunrise/sunset effects)
500 // Make call to fog sunrise/sunset adjustment method.
501 // Add a stdc++ library bug work around to fg_init.cxx
503 // Revision 1.25 1998/07/13 21:01:38 curt
504 // Wrote access functions for current fgOPTIONS.
506 // Revision 1.24 1998/07/13 15:32:39 curt
507 // Clear color buffer if drawing wireframe.
508 // When specifying and airport, start elevation at -1000 and let the system
509 // position you at ground level.
511 // Revision 1.23 1998/07/12 03:14:43 curt
512 // Added ground collision detection.
513 // Did some serious horsing around to be able to "hug" the ground properly
514 // and still be able to take off.
515 // Set the near clip plane to 1.0 meters when less than 10 meters above the
517 // Did some serious horsing around getting the initial airplane position to be
518 // correct based on rendered terrain elevation.
519 // Added a little cheat/hack that will prevent the view position from ever
520 // dropping below the terrain, even when the flight model doesn't quite
521 // put you as high as you'd like.
523 // Revision 1.22 1998/07/04 00:52:25 curt
524 // Add my own version of gluLookAt() (which is nearly identical to the
525 // Mesa/glu version.) But, by calculating the Model View matrix our selves
526 // we can save this matrix without having to read it back in from the video
527 // card. This hopefully allows us to save a few cpu cycles when rendering
528 // out the fragments because we can just use glLoadMatrixd() with the
529 // precalculated matrix for each tile rather than doing a push(), translate(),
530 // pop() for every fragment.
532 // Panel status defaults to off for now until it gets a bit more developed.
534 // Extract OpenGL driver info on initialization.
536 // Revision 1.21 1998/06/27 16:54:33 curt
537 // Replaced "extern displayInstruments" with a entry in fgOPTIONS.
538 // Don't change the view port when displaying the panel.
540 // Revision 1.20 1998/06/17 21:35:12 curt
541 // Refined conditional audio support compilation.
542 // Moved texture parameter setup calls to ../Scenery/materials.cxx
543 // #include <string.h> before various STL includes.
544 // Make HUD default state be enabled.
546 // Revision 1.19 1998/06/08 17:57:05 curt
547 // Minor sound/startup position tweaks.
549 // Revision 1.18 1998/06/03 00:47:14 curt
550 // Updated to compile in audio support if OSS available.
551 // Updated for new version of Steve's audio library.
552 // STL includes don't use .h
553 // Small view optimizations.
555 // Revision 1.17 1998/06/01 17:54:42 curt
556 // Added Linux audio support.
557 // avoid glClear( COLOR_BUFFER_BIT ) when not using it to set the sky color.
560 // Revision 1.16 1998/05/29 20:37:24 curt
561 // Tweaked material properties & lighting a bit in GLUTmain.cxx.
562 // Read airport list into a "map" STL for dynamic list sizing and fast tree
565 // Revision 1.15 1998/05/22 21:28:53 curt
566 // Modifications to use the new fgEVENT_MGR class.
568 // Revision 1.14 1998/05/20 20:51:35 curt
569 // Tweaked smooth shaded texture lighting properties.
570 // Converted fgLIGHT to a C++ class.
572 // Revision 1.13 1998/05/16 13:08:35 curt
573 // C++ - ified views.[ch]xx
574 // Shuffled some additional view parameters into the fgVIEW class.
575 // Changed tile-radius to tile-diameter because it is a much better
577 // Added a WORLD_TO_EYE transformation to views.cxx. This allows us
578 // to transform world space to eye space for view frustum culling.
580 // Revision 1.12 1998/05/13 18:29:58 curt
581 // Added a keyboard binding to dynamically adjust field of view.
582 // Added a command line option to specify fov.
583 // Adjusted terrain color.
584 // Root path info moved to fgOPTIONS.
585 // Added ability to parse options out of a config file.
587 // Revision 1.11 1998/05/07 23:14:15 curt
588 // Added "D" key binding to set autopilot heading.
589 // Made frame rate calculation average out over last 10 frames.
590 // Borland C++ floating point exception workaround.
591 // Added a --tile-radius=n option.
593 // Revision 1.10 1998/05/06 03:16:24 curt
594 // Added an averaged global frame rate counter.
595 // Added an option to control tile radius.
597 // Revision 1.9 1998/05/03 00:47:31 curt
598 // Added an option to enable/disable full-screen mode.
600 // Revision 1.8 1998/04/30 12:34:18 curt
601 // Added command line rendering options:
602 // enable/disable fog/haze
603 // specify smooth/flat shading
604 // disable sky blending and just use a solid color
605 // enable wireframe drawing mode
607 // Revision 1.7 1998/04/28 01:20:22 curt
608 // Type-ified fgTIME and fgVIEW.
609 // Added a command line option to disable textures.
611 // Revision 1.6 1998/04/26 05:10:03 curt
612 // "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
614 // Revision 1.5 1998/04/25 22:06:30 curt
615 // Edited cvs log messages in source files ... bad bad bad!
617 // Revision 1.4 1998/04/25 20:24:01 curt
618 // Cleaned up initialization sequence to eliminate interdependencies
619 // between sun position, lighting, and view position. This creates a
620 // valid single pass initialization path.
622 // Revision 1.3 1998/04/25 15:11:11 curt
623 // Added an command line option to set starting position based on airport ID.
625 // Revision 1.2 1998/04/24 00:49:20 curt
626 // Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
627 // Trying out some different option parsing code.
628 // Some code reorganization.
630 // Revision 1.1 1998/04/22 13:25:44 curt
631 // C++ - ifing the code.
632 // Starting a bit of reorganization of lighting code.
634 // Revision 1.56 1998/04/18 04:11:28 curt
635 // Moved fg_debug to it's own library, added zlib support.
637 // Revision 1.55 1998/04/14 02:21:03 curt
638 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
639 // <jgoeke@voyager.net>
641 // Revision 1.54 1998/04/08 23:35:36 curt
642 // Tweaks to Gnu automake/autoconf system.
644 // Revision 1.53 1998/04/03 22:09:06 curt
645 // Converting to Gnu autoconf system.
647 // Revision 1.52 1998/03/23 21:24:38 curt
648 // Source code formating tweaks.
650 // Revision 1.51 1998/03/14 00:31:22 curt
651 // Beginning initial terrain texturing experiments.
653 // Revision 1.50 1998/03/09 22:46:19 curt
656 // Revision 1.49 1998/02/23 19:07:59 curt
657 // Incorporated Durk's Astro/ tweaks. Includes unifying the sun position
658 // calculation code between sun display, and other FG sections that use this
659 // for things like lighting.
661 // Revision 1.48 1998/02/21 14:53:15 curt
662 // Added Charlie's HUD changes.
664 // Revision 1.47 1998/02/19 13:05:53 curt
665 // Incorporated some HUD tweaks from Michelle America.
666 // Tweaked the sky's sunset/rise colors.
667 // Other misc. tweaks.
669 // Revision 1.46 1998/02/18 15:07:06 curt
670 // Tweaks to build with SGI OpenGL (and therefor hopefully other accelerated
671 // drivers will work.)
673 // Revision 1.45 1998/02/16 13:39:43 curt
674 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
675 // tiles to occasionally be missing.
677 // Revision 1.44 1998/02/12 21:59:50 curt
678 // Incorporated code changes contributed by Charlie Hotchkiss
679 // <chotchkiss@namg.us.anritsu.com>
681 // Revision 1.43 1998/02/11 02:50:40 curt
684 // Revision 1.42 1998/02/09 22:56:58 curt
685 // Removed "depend" files from cvs control. Other minor make tweaks.
687 // Revision 1.41 1998/02/09 15:07:50 curt
690 // Revision 1.40 1998/02/07 15:29:44 curt
691 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
692 // <chotchkiss@namg.us.anritsu.com>
694 // Revision 1.39 1998/02/03 23:20:25 curt
695 // Lots of little tweaks to fix various consistency problems discovered by
696 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
697 // passed arguments along to the real printf(). Also incorporated HUD changes
698 // by Michele America.
700 // Revision 1.38 1998/02/02 20:53:58 curt
701 // Incorporated Durk's changes.
703 // Revision 1.37 1998/02/01 03:39:54 curt
706 // Revision 1.36 1998/01/31 00:43:13 curt
707 // Added MetroWorks patches from Carmen Volpe.
709 // Revision 1.35 1998/01/27 00:47:57 curt
710 // Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
711 // system and commandline/config file processing code.
713 // Revision 1.34 1998/01/22 02:59:37 curt
714 // Changed #ifdef FILE_H to #ifdef _FILE_H
716 // Revision 1.33 1998/01/21 21:11:34 curt
719 // Revision 1.32 1998/01/19 19:27:08 curt
720 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
721 // This should simplify things tremendously.
723 // Revision 1.31 1998/01/19 18:40:32 curt
724 // Tons of little changes to clean up the code and to remove fatal errors
725 // when building with the c++ compiler.
727 // Revision 1.30 1998/01/13 00:23:09 curt
728 // Initial changes to support loading and management of scenery tiles. Note,
729 // there's still a fair amount of work left to be done.
731 // Revision 1.29 1998/01/08 02:22:08 curt
732 // Beginning to integrate Tile management subsystem.
734 // Revision 1.28 1998/01/07 03:18:58 curt
735 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
737 // Revision 1.27 1998/01/05 18:44:35 curt
738 // Add an option to advance/decrease time from keyboard.
740 // Revision 1.26 1997/12/30 23:09:04 curt
741 // Tweaking initialization sequences.
743 // Revision 1.25 1997/12/30 22:22:33 curt
744 // Further integration of event manager.
746 // Revision 1.24 1997/12/30 20:47:44 curt
747 // Integrated new event manager with subsystem initializations.
749 // Revision 1.23 1997/12/30 16:36:50 curt
750 // Merged in Durk's changes ...
752 // Revision 1.22 1997/12/19 23:34:05 curt
753 // Lot's of tweaking with sky rendering and lighting.
755 // Revision 1.21 1997/12/19 16:45:00 curt
756 // Working on scene rendering order and options.
758 // Revision 1.20 1997/12/18 23:32:33 curt
759 // First stab at sky dome actually starting to look reasonable. :-)
761 // Revision 1.19 1997/12/17 23:13:36 curt
762 // Began working on rendering a sky.
764 // Revision 1.18 1997/12/15 23:54:49 curt
765 // Add xgl wrappers for debugging.
766 // Generate terrain normals on the fly.
768 // Revision 1.17 1997/12/15 20:59:09 curt
771 // Revision 1.16 1997/12/12 19:52:48 curt
772 // Working on lightling and material properties.
774 // Revision 1.15 1997/12/11 04:43:55 curt
775 // Fixed sun vector and lighting problems. I thing the moon is now lit
778 // Revision 1.14 1997/12/10 22:37:47 curt
779 // Prepended "fg" on the name of all global structures that didn't have it yet.
780 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
782 // Revision 1.13 1997/11/25 19:25:32 curt
783 // Changes to integrate Durk's moon/sun code updates + clean up.
785 // Revision 1.12 1997/11/15 18:16:35 curt
788 // Revision 1.11 1997/10/30 12:38:42 curt
789 // Working on new scenery subsystem.
791 // Revision 1.10 1997/10/25 03:24:23 curt
792 // Incorporated sun, moon, and star positioning code contributed by Durk Talsma.
794 // Revision 1.9 1997/09/23 00:29:39 curt
795 // Tweaks to get things to compile with gcc-win32.
797 // Revision 1.8 1997/09/22 14:44:20 curt
798 // Continuing to try to align stars correctly.
800 // Revision 1.7 1997/09/16 15:50:30 curt
801 // Working on star alignment and time issues.
803 // Revision 1.6 1997/09/05 14:17:30 curt
804 // More tweaking with stars.
806 // Revision 1.5 1997/09/04 02:17:36 curt
809 // Revision 1.4 1997/08/27 21:32:26 curt
810 // Restructured view calculation code. Added stars.
812 // Revision 1.3 1997/08/27 03:30:19 curt
813 // Changed naming scheme of basic shared structures.
815 // Revision 1.2 1997/08/25 20:27:23 curt
816 // Merged in initial HUD and Joystick code.
818 // Revision 1.1 1997/08/23 01:46:20 curt