1 // GLUTmain.cxx -- top level sim routines
3 // Written by Curtis Olson for OpenGL, started May 1997.
5 // Copyright (C) 1997 Curtis L. Olson - curt@me.umn.edu
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.
22 // (Log is kept at end of this file)
24 #define MICHAEL_JOHNSON_EXPERIMENTAL_ENGINE_AUDIO
45 #include <sys/stat.h> /* for stat() */
48 # include <unistd.h> /* for stat() */
51 #include <Include/fg_constants.h> // for VERSION
52 #include <Include/general.hxx>
54 #include <Aircraft/aircraft.hxx>
55 #include <Astro/sky.hxx>
56 #include <Astro/stars.hxx>
57 #include <Astro/solarsystem.hxx>
59 #ifdef ENABLE_AUDIO_SUPPORT
60 # include <Audio/src/sl.h>
61 # include <Audio/src/sm.h>
64 #include <Autopilot/autopilot.hxx>
65 #include <Cockpit/cockpit.hxx>
66 #include <Debug/logstream.hxx>
68 #include <Joystick/joystick.hxx>
69 #include <Math/fg_geodesy.hxx>
70 #include <Math/mat3.h>
71 #include <Math/polar3d.hxx>
73 #include <Scenery/scenery.hxx>
74 #include <Scenery/tilemgr.hxx>
75 #include <Time/event.hxx>
76 #include <Time/fg_time.hxx>
77 #include <Time/fg_timer.hxx>
78 #include <Time/sunpos.hxx>
79 #include <Weather/weather.hxx>
81 #include "GLUTkey.hxx"
82 #include "fg_init.hxx"
83 #include "options.hxx"
88 // This is a record containing a bit of global housekeeping information
91 // Specify our current idle function state. This is used to run all
92 // our initializations out of the glutIdleLoop() so that we can get a
93 // splash screen up and running right away.
94 static int idle_state = 0;
99 // Yet another hack, this time for the panel
102 // Global structures for the Audio library
103 #ifdef ENABLE_AUDIO_SUPPORT
104 slEnvelope pitch_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
105 slEnvelope volume_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
106 slScheduler *audio_sched;
107 smMixer *audio_mixer;
113 // The following defines flight gear options. Because glutlib will also
114 // want to parse its own options, those options must not be included here
115 // or they will get parsed by the main program option parser. Hence case
116 // is significant for any option added that might be in conflict with
119 // glutlib parses for:
121 // -direct (invalid in Win32)
125 // -indirect (invalid in Win32)
128 // Note that glutlib depends upon strings while this program's
129 // option parser wants only initial characters followed by numbers
134 // fgInitVisuals() -- Initialize various GL/view parameters
135 static void fgInitVisuals( void ) {
138 l = &cur_light_params;
140 // Go full screen if requested ...
141 if ( current_options.get_fullscreen() ) {
145 // If enabled, normal vectors specified with glNormal are scaled
146 // to unit length after transformation. See glNormal.
147 // xglEnable( GL_NORMALIZE );
149 xglEnable( GL_LIGHTING );
150 xglEnable( GL_LIGHT0 );
151 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
153 // xglFogi (GL_FOG_MODE, GL_LINEAR);
154 xglFogi (GL_FOG_MODE, GL_EXP2);
155 // Fog density is now set when the weather system is initialized
156 // xglFogf (GL_FOG_DENSITY, w->fog_density);
157 if ( (current_options.get_fog() == 1) ||
158 (current_options.get_shading() == 0) ) {
159 // if fastest fog requested, or if flat shading force fastest
160 xglHint ( GL_FOG_HINT, GL_FASTEST );
161 } else if ( current_options.get_fog() == 2 ) {
162 xglHint ( GL_FOG_HINT, GL_NICEST );
164 if ( current_options.get_wireframe() ) {
166 xglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
169 // This is the default anyways, but it can't hurt
170 xglFrontFace ( GL_CCW );
173 // xglEnable(GL_POINT_SMOOTH);
174 // xglEnable(GL_LINE_SMOOTH);
175 // xglEnable(GL_POLYGON_SMOOTH);
180 // Draw a basic instrument panel
181 static void fgUpdateInstrViewParams( void ) {
185 fgVIEW *v = ¤t_view;
187 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) / 2);
189 xglMatrixMode(GL_PROJECTION);
193 gluOrtho2D(0, 640, 0, 480);
194 xglMatrixMode(GL_MODELVIEW);
198 xglColor3f(1.0, 1.0, 1.0);
201 xglDisable(GL_DEPTH_TEST);
202 xglDisable(GL_LIGHTING);
205 xglColor3f (0.5, 0.5, 0.5);
208 xglVertex2f(0.0, 0.00);
209 xglVertex2f(0.0, 480.0);
210 xglVertex2f(640.0,480.0);
211 xglVertex2f(640.0, 0.0);
214 xglRectf(0.0,0.0, 640, 480);
215 xglEnable(GL_DEPTH_TEST);
216 xglEnable(GL_LIGHTING);
217 xglMatrixMode(GL_PROJECTION);
219 xglMatrixMode(GL_MODELVIEW);
225 // Update all Visuals (redraws anything graphics related)
226 static void fgRenderFrame( void ) {
227 fgLIGHT *l = &cur_light_params;
228 fgTIME *t = &cur_time_params;
229 FGView *v = ¤t_view;
232 static int iteration = 0;
233 // GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
234 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
235 GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
236 GLbitfield clear_mask;
238 if ( idle_state != 1000 ) {
239 // still initializing, draw the splash screen
240 if ( current_options.get_splash_screen() == 1 ) {
244 // idle_state is now 1000 meaning we've finished all our
245 // initializations and are running the main loop, so this will
246 // now work without seg faulting the system.
248 // printf("Ground = %.2f Altitude = %.2f\n", scenery.cur_elev,
249 // FG_Altitude * FEET_TO_METER);
251 // this is just a temporary hack, to make me understand Pui
252 // timerText -> setLabel (ctime (&t->cur_time));
255 // update view volume parameters
256 v->UpdateViewParams();
258 // set the sun position
259 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
261 clear_mask = GL_DEPTH_BUFFER_BIT;
262 if ( current_options.get_wireframe() ) {
263 clear_mask |= GL_COLOR_BUFFER_BIT;
265 if ( current_options.get_panel_status() ) {
266 // we can't clear the screen when the panel is active
267 } else if ( current_options.get_skyblend() ) {
268 if ( current_options.get_textures() ) {
269 // glClearColor(black[0], black[1], black[2], black[3]);
270 glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
271 l->adj_fog_color[2], l->adj_fog_color[3]);
272 clear_mask |= GL_COLOR_BUFFER_BIT;
275 glClearColor(l->sky_color[0], l->sky_color[1],
276 l->sky_color[2], l->sky_color[3]);
277 clear_mask |= GL_COLOR_BUFFER_BIT;
279 xglClear( clear_mask );
281 // Tell GL we are switching to model view parameters
282 xglMatrixMode(GL_MODELVIEW);
283 // xglLoadIdentity();
286 xglDisable( GL_DEPTH_TEST );
287 xglDisable( GL_LIGHTING );
288 xglDisable( GL_CULL_FACE );
289 xglDisable( GL_FOG );
290 xglShadeModel( GL_SMOOTH );
291 if ( current_options.get_skyblend() ) {
295 // setup transformation for drawing astronomical objects
297 // Translate to view position
298 Point3D view_pos = v->get_view_pos();
299 xglTranslatef( view_pos.x(), view_pos.y(), view_pos.z() );
300 // Rotate based on gst (sidereal time)
301 // note: constant should be 15.041085, Curt thought it was 15
302 angle = t->gst * 15.041085;
303 // printf("Rotating astro objects by %.2f degrees\n",angle);
304 xglRotatef( angle, 0.0, 0.0, -1.0 );
306 // draw stars and planets
308 SolarSystem::theSolarSystem->draw();
313 if ( current_options.get_shading() ) {
314 xglShadeModel( GL_SMOOTH );
316 xglShadeModel( GL_FLAT );
318 xglEnable( GL_DEPTH_TEST );
319 if ( current_options.get_fog() > 0 ) {
321 xglFogfv (GL_FOG_COLOR, l->adj_fog_color);
323 // set lighting parameters
324 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
325 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
327 if ( current_options.get_textures() ) {
328 // texture parameters
329 xglEnable( GL_TEXTURE_2D );
330 xglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
331 xglHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
332 // set base color (I don't think this is doing anything here)
333 xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
334 xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
336 xglDisable( GL_TEXTURE_2D );
337 xglMaterialfv (GL_FRONT, GL_AMBIENT, terrain_color);
338 xglMaterialfv (GL_FRONT, GL_DIFFUSE, terrain_color);
339 // xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
340 // xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
345 xglDisable( GL_TEXTURE_2D );
346 xglDisable( GL_FOG );
348 if ( (iteration == 0) && (current_options.get_panel_status()) ) {
349 // Did we run this loop before ?? ...and do we need the panel ??
350 fgPanelReInit(0, 0, 1024, 768);
353 // display HUD && Panel
355 iteration = 1; // don't ReInit the panel in the future
357 // We can do translucent menus, so why not. :-)
358 xglEnable ( GL_BLEND ) ;
359 xglBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
361 xglDisable ( GL_BLEND ) ;
369 // Update internal time dependent calculations (i.e. flight model)
370 void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
371 FGState *f = current_aircraft.fdm_state;
372 fgLIGHT *l = &cur_light_params;
373 fgTIME *t = &cur_time_params;
374 FGView *v = ¤t_view;
377 // update the flight model
378 if ( multi_loop < 0 ) {
379 multi_loop = DEFAULT_MULTILOOP;
383 // run Autopilot system
386 // printf("updating flight model x %d\n", multi_loop);
387 fgFlightModelUpdate( current_options.get_flight_model(),
388 cur_fdm_state, multi_loop, remainder );
390 fgFlightModelUpdate( current_options.get_flight_model(),
391 cur_fdm_state, 0, remainder );
394 // update the view angle
395 for ( i = 0; i < multi_loop; i++ ) {
396 if ( fabs(v->get_goal_view_offset() - v->get_view_offset()) < 0.05 ) {
397 v->set_view_offset( v->get_goal_view_offset() );
400 // move v->view_offset towards v->goal_view_offset
401 if ( v->get_goal_view_offset() > v->get_view_offset() ) {
402 if ( v->get_goal_view_offset() - v->get_view_offset() < FG_PI ){
403 v->inc_view_offset( 0.01 );
405 v->inc_view_offset( -0.01 );
408 if ( v->get_view_offset() - v->get_goal_view_offset() < FG_PI ){
409 v->inc_view_offset( -0.01 );
411 v->inc_view_offset( 0.01 );
414 if ( v->get_view_offset() > FG_2PI ) {
415 v->inc_view_offset( -FG_2PI );
416 } else if ( v->get_view_offset() < 0 ) {
417 v->inc_view_offset( FG_2PI );
422 double tmp = -(l->sun_rotation + FG_PI)
423 - (f->get_Psi() - v->get_view_offset() );
424 while ( tmp < 0.0 ) {
427 while ( tmp > FG_2PI ) {
430 /* printf("Psi = %.2f, viewoffset = %.2f sunrot = %.2f rottosun = %.2f\n",
431 FG_Psi * RAD_TO_DEG, v->view_offset * RAD_TO_DEG,
432 -(l->sun_rotation+FG_PI) * RAD_TO_DEG, tmp * RAD_TO_DEG); */
437 void fgInitTimeDepCalcs( void ) {
440 // #ifdef HAVE_SETITIMER
441 // fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
442 // #endif HAVE_SETITIMER
445 static const double alt_adjust_ft = 3.758099;
446 static const double alt_adjust_m = alt_adjust_ft * FEET_TO_METER;
448 // What should we do when we have nothing else to do? Let's get ready
449 // for the next move and update the display?
450 static void fgMainLoop( void ) {
453 static int remainder = 0;
454 int elapsed, multi_loop;
457 static time_t last_time = 0;
458 static int frames = 0;
460 f = current_aircraft.fdm_state;
461 t = &cur_time_params;
463 FG_LOG( FG_ALL, FG_DEBUG, "Running Main Loop");
464 FG_LOG( FG_ALL, FG_DEBUG, "======= ==== ====");
466 #if defined( ENABLE_LINUX_JOYSTICK )
467 // Read joystick and update control settings
469 #elif defined( ENABLE_GLUT_JOYSTICK )
470 // Glut joystick support works by feeding a joystick handler
471 // function to glut. This is taken care of once in the joystick
472 // init routine and we don't have to worry about it again.
475 current_weather.Update();
477 // Fix elevation. I'm just sticking this here for now, it should
478 // probably move eventually
480 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
482 f->get_Runway_altitude() * FEET_TO_METER,
483 f->get_Altitude() * FEET_TO_METER); */
485 if ( scenery.cur_elev > -9990 ) {
486 if ( f->get_Altitude() * FEET_TO_METER <
487 (scenery.cur_elev + alt_adjust_m - 3.0) ) {
488 // now set aircraft altitude above ground
489 printf("Current Altitude = %.2f < %.2f forcing to %.2f\n",
490 f->get_Altitude() * FEET_TO_METER,
491 scenery.cur_elev + alt_adjust_m - 3.0,
492 scenery.cur_elev + alt_adjust_m );
493 fgFlightModelSetAltitude( current_options.get_flight_model(),
494 scenery.cur_elev + alt_adjust_m );
496 FG_LOG( FG_ALL, FG_DEBUG,
497 "<*> resetting altitude to "
498 << f->get_Altitude() * FEET_TO_METER << " meters" );
500 f->set_Runway_altitude( scenery.cur_elev * METER_TO_FEET );
503 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
505 f->get_Runway_altitude() * FEET_TO_METER,
506 f->get_Altitude() * FEET_TO_METER); */
511 // Get elapsed time for this past frame
512 elapsed = fgGetTimeInterval();
513 FG_LOG( FG_ALL, FG_BULK,
514 "Time interval is = " << elapsed
515 << ", previous remainder is = " << remainder );
517 // Calculate frame rate average
518 if ( (t->cur_time != last_time) && (last_time > 0) ) {
519 general.set_frame_rate( frames );
522 last_time = t->cur_time;
525 /* old fps calculation
528 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
529 accum += g->frames[i];
530 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
531 g->frames[i+1] = g->frames[i];
533 g->frames[0] = 1000.0 / (float)elapsed;
534 // printf("frame[0] = %.2f\n", g->frames[0]);
535 accum += g->frames[0];
536 g->frame_rate = accum / (float)FG_FRAME_RATE_HISTORY;
537 // printf("ave = %.2f\n", g->frame_rate);
542 if ( ! use_signals ) {
543 // Calculate model iterations needed for next frame
544 FG_LOG( FG_ALL, FG_DEBUG,
545 "--> Frame rate is = " << general.get_frame_rate() );
546 elapsed += remainder;
548 multi_loop = (int)(((float)elapsed * 0.001) * DEFAULT_MODEL_HZ);
549 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
550 FG_LOG( FG_ALL, FG_BULK,
551 "Model iterations needed = " << multi_loop
552 << ", new remainder = " << remainder );
555 if ( multi_loop > 0 ) {
556 fgUpdateTimeDepCalcs(multi_loop, remainder);
558 FG_LOG( FG_ALL, FG_INFO, "Elapsed time is zero ... we're zinging" );
562 // Do any serial port work that might need to be done
565 // see if we need to load any new scenery tiles
568 // Process/manage pending events
569 global_events.Process();
571 // Run audio scheduler
572 #ifdef ENABLE_AUDIO_SUPPORT
573 if ( current_options.get_sound() && audio_sched->working() ) {
575 # ifdef MICHAEL_JOHNSON_EXPERIMENTAL_ENGINE_AUDIO
577 // note: all these factors are relative to the sample. our
578 // sample format should really contain a conversion factor so
579 // that we can get prop speed right for arbitrary samples.
580 // Note that for normal-size props, there is a point at which
581 // the prop tips approach the speed of sound; that is a pretty
582 // strong limit to how fast the prop can go.
584 // multiplication factor is prime pitch control; add some log
585 // component for verisimilitude
587 double pitch = log((controls.get_throttle(0) * 14.0) + 1.0);
588 //fprintf(stderr, "pitch1: %f ", pitch);
589 if (controls.get_throttle(0) > 0.0 || f->v_rel_wind > 40.0) {
590 //fprintf(stderr, "rel_wind: %f ", f->v_rel_wind);
591 // only add relative wind and AoA if prop is moving
592 // or we're really flying at idle throttle
593 if (pitch < 5.4) { // this needs tuning
594 // prop tips not breaking sound barrier
595 pitch += log(f->v_rel_wind + 0.8)/2;
597 // prop tips breaking sound barrier
598 pitch += log(f->v_rel_wind + 0.8)/10;
600 //fprintf(stderr, "pitch2: %f ", pitch);
601 //fprintf(stderr, "AoA: %f ", FG_Gamma_vert_rad);
603 // Angle of Attack next... -x^3(e^x) is my best guess Just
604 // need to calculate some reasonable scaling factor and
605 // then clamp it on the positive aoa (neg adj) side
606 double aoa = f->get_Gamma_vert_rad() * 2.2;
608 double aoa_adj = pow(-aoa, tmp) * pow(M_E, aoa);
609 if (aoa_adj < -0.8) aoa_adj = -0.8;
611 //fprintf(stderr, "pitch3: %f ", pitch);
613 // don't run at absurdly slow rates -- not realistic
614 // and sounds bad to boot. :-)
615 if (pitch < 0.8) pitch = 0.8;
617 //fprintf(stderr, "pitch4: %f\n", pitch);
619 double volume = controls.get_throttle(0) * 1.15 + 0.3 +
620 log(f->v_rel_wind + 1.0)/14.0;
621 // fprintf(stderr, "volume: %f\n", volume);
623 pitch_envelope.setStep ( 0, 0.01, pitch );
624 volume_envelope.setStep ( 0, 0.01, volume );
628 double param = controls.get_throttle( 0 ) * 2.0 + 1.0;
629 pitch_envelope.setStep ( 0, 0.01, param );
630 volume_envelope.setStep ( 0, 0.01, param );
632 # endif // experimental throttle patch
634 audio_sched -> update();
641 FG_LOG( FG_ALL, FG_DEBUG, "" );
645 // This is the top level master main function that is registered as
649 // The first few passes take care of initialization things (a couple
650 // per pass) and once everything has been initialized fgMainLoop from
653 static void fgIdleFunction ( void ) {
654 // printf("idle state == %d\n", idle_state);
656 if ( idle_state == 0 ) {
657 // Initialize the splash screen right away
658 if ( current_options.get_splash_screen() ) {
663 } else if ( idle_state == 1 ) {
664 // Start the intro music
666 if ( current_options.get_intro_music() ) {
667 string lockfile = "/tmp/mpg123.running";
668 string mp3file = current_options.get_fg_root() +
670 string command = "(touch " + lockfile + "; mpg123 " + mp3file +
671 "> /dev/null 2>&1; /bin/rm " + lockfile + ") &";
672 FG_LOG( FG_GENERAL, FG_INFO,
673 "Starting intro music: " << mp3file );
674 system ( command.c_str() );
679 } else if ( idle_state == 2 ) {
680 // These are a few miscellaneous things that aren't really
681 // "subsystems" but still need to be initialized.
684 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
685 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
690 } else if ( idle_state == 3 ) {
691 // This is the top level init routine which calls all the
692 // other subsystem initialization routines. If you are adding
693 // a subsystem to flight gear, its initialization call should
694 // located in this routine.
695 if( !fgInitSubsystems()) {
696 FG_LOG( FG_GENERAL, FG_ALERT,
697 "Subsystem initializations failed ..." );
702 } else if ( idle_state == 4 ) {
703 // setup OpenGL view parameters
707 // init timer routines, signals, etc. Arrange for an alarm
708 // signal to be generated, etc.
709 fgInitTimeDepCalcs();
713 } else if ( idle_state == 5 ) {
716 } else if ( idle_state == 6 ) {
717 // Initialize audio support
718 #ifdef ENABLE_AUDIO_SUPPORT
721 if ( current_options.get_intro_music() ) {
722 // Let's wait for mpg123 to finish
723 string lockfile = "/tmp/mpg123.running";
724 struct stat stat_buf;
726 FG_LOG( FG_GENERAL, FG_INFO,
727 "Waiting for mpg123 player to finish ..." );
728 while ( stat(lockfile.c_str(), &stat_buf) == 0 ) {
729 // file exist, wait ...
731 FG_LOG( FG_GENERAL, FG_INFO, ".");
733 FG_LOG( FG_GENERAL, FG_INFO, "");
737 audio_sched = new slScheduler ( 8000 );
738 audio_mixer = new smMixer;
739 audio_mixer -> setMasterVolume ( 50 ) ; /* 80% of max volume. */
740 audio_sched -> setSafetyMargin ( 1.0 ) ;
741 string slfile = current_options.get_fg_root() + "/Sounds/wasp.wav";
743 s1 = new slSample ( (char *)slfile.c_str() );
744 FG_LOG( FG_GENERAL, FG_INFO,
745 "Rate = " << s1 -> getRate()
746 << " Bps = " << s1 -> getBps()
747 << " Stereo = " << s1 -> getStereo() );
748 audio_sched -> loopSample ( s1 );
750 if ( audio_sched->working() ) {
751 pitch_envelope.setStep ( 0, 0.01, 0.6 );
752 volume_envelope.setStep ( 0, 0.01, 0.6 );
754 audio_sched -> addSampleEnvelope( s1, 0, 0, &
757 audio_sched -> addSampleEnvelope( s1, 0, 1,
759 SL_VOLUME_ENVELOPE );
762 // strcpy(slfile, path);
763 // strcat(slfile, "thunder.wav");
764 // s2 -> loadFile ( slfile );
765 // s2 -> adjustVolume(0.5);
766 // audio_sched -> playSample ( s2 );
773 if ( idle_state == 1000 ) {
774 // We've finished all our initialization steps, from now on we
775 // run the main loop.
779 if ( current_options.get_splash_screen() == 1 ) {
786 // Handle new window size or exposure
787 static void fgReshape( int width, int height ) {
788 // Do this so we can call fgReshape(0,0) ourselves without having
789 // to know what the values of width & height are.
790 if ( (height > 0) && (width > 0) ) {
791 if ( ! current_options.get_panel_status() ) {
792 current_view.set_win_ratio( (GLfloat) width / (GLfloat) height );
794 current_view.set_win_ratio( (GLfloat) width /
795 ((GLfloat) (height)*0.4232) );
799 current_view.set_winWidth( width );
800 current_view.set_winHeight( height );
801 current_view.force_update_fov_math();
803 // Inform gl of our view window size (now handled elsewhere)
804 // xglViewport(0, 0, (GLint)width, (GLint)height);
805 if ( idle_state == 1000 ) {
806 // yes we've finished all our initializations and are running
807 // the main loop, so this will now work without seg faulting
809 current_view.UpdateViewParams();
810 if ( current_options.get_panel_status() ) {
811 fgPanelReInit(0, 0, 1024, 768);
817 // Initialize GLUT and define a main window
818 int fgGlutInit( int *argc, char **argv ) {
819 // GLUT will extract all glut specific options so later on we only
820 // need wory about our own.
821 xglutInit(argc, argv);
823 // Define Display Parameters
824 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
826 FG_LOG( FG_GENERAL, FG_INFO, "Opening a window: " <<
827 current_options.get_xsize() << "x" << current_options.get_ysize() );
829 // Define initial window size
830 xglutInitWindowSize( current_options.get_xsize(),
831 current_options.get_ysize() );
833 // Initialize windows
834 if ( current_options.get_game_mode() == 0 ) {
835 // Open the regular window
836 xglutCreateWindow("Flight Gear");
838 // Open the cool new 'game mode' window
839 string game_mode_params = "width=" + current_options.get_xsize();
840 game_mode_params += "height=" + current_options.get_ysize();
841 game_mode_params += " bpp=16";
842 cout << "game mode params = " << game_mode_params;
843 glutGameModeString( game_mode_params.c_str() );
847 // This seems to be the absolute earliest in the init sequence
848 // that these calls will return valid info. Too bad it's after
849 // we've already created and sized out window. :-(
850 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
851 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
852 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
854 FG_LOG ( FG_GENERAL, FG_INFO, general.get_glRenderer() );
857 // try to determine if we should adjust the initial default
858 // display resolution. The options class defaults (is
859 // initialized) to 640x480.
860 string renderer = general.glRenderer;
862 // currently we only know how to deal with Mesa/Glide/Voodoo cards
863 if ( renderer.find( "Glide" ) != string::npos ) {
864 FG_LOG( FG_GENERAL, FG_INFO, "Detected a Glide driver" );
865 if ( renderer.find( "FB/8" ) != string::npos ) {
866 // probably a voodoo-2
867 if ( renderer.find( "TMU/SLI" ) != string::npos ) {
868 // probably two SLI'd Voodoo-2's
869 current_options.set_xsize( 1024 );
870 current_options.set_ysize( 768 );
871 FG_LOG( FG_GENERAL, FG_INFO,
872 "It looks like you have two sli'd voodoo-2's." << endl
873 << "upgrading your win resolution to 1024 x 768" );
874 glutReshapeWindow(1024, 768);
876 // probably a single non-SLI'd Voodoo-2
877 current_options.set_xsize( 800 );
878 current_options.set_ysize( 600 );
879 FG_LOG( FG_GENERAL, FG_INFO,
880 "It looks like you have a voodoo-2." << endl
881 << "upgrading your win resolution to 800 x 600" );
882 glutReshapeWindow(800, 600);
884 } else if ( renderer.find( "FB/2" ) != string::npos ) {
885 // probably a voodoo-1, stick with the default
888 // we have no special knowledge of this card, stick with the default
896 // Initialize GLUT event handlers
897 int fgGlutInitEvents( void ) {
898 // call fgReshape() on window resizes
899 xglutReshapeFunc( fgReshape );
901 // call GLUTkey() on keyboard event
902 xglutKeyboardFunc( GLUTkey );
903 glutSpecialFunc( GLUTspecialkey );
905 // call guiMouseFunc() whenever our little rodent is used
906 glutMouseFunc ( guiMouseFunc );
907 glutMotionFunc (guiMotionFunc );
908 glutPassiveMotionFunc (guiMotionFunc );
910 // call fgMainLoop() whenever there is
911 // nothing else to do
912 xglutIdleFunc( fgIdleFunction );
915 xglutDisplayFunc( fgRenderFrame );
922 int main( int argc, char **argv ) {
925 f = current_aircraft.fdm_state;
928 _control87(MCW_EM, MCW_EM); /* defined in float.h */
931 // Initialize the [old] debugging output system
934 // set default log levels
935 fglog().setLogLevels( FG_ALL, FG_INFO );
937 FG_LOG( FG_GENERAL, FG_INFO, "Flight Gear: Version " << VERSION << endl );
941 FG_LOG( FG_GENERAL, FG_INFO, "General Initialization" );
942 FG_LOG( FG_GENERAL, FG_INFO, "======= ==============" );
944 // Attempt to locate and parse a config file
945 // First check fg_root
946 string config = current_options.get_fg_root() + "/system.fgfsrc";
947 current_options.parse_config_file( config );
949 // Next check home directory
950 char* envp = ::getenv( "HOME" );
951 if ( envp != NULL ) {
953 config += "/.fgfsrc";
954 current_options.parse_config_file( config );
957 // Parse remaining command line options
958 // These will override anything specified in a config file
959 if ( current_options.parse_command_line(argc, argv) !=
960 fgOPTIONS::FG_OPTIONS_OK )
962 // Something must have gone horribly wrong with the command
963 // line parsing or maybe the user just requested help ... :-)
964 current_options.usage();
965 // FG_LOG( FG_GENERAL, FG_ALERT, "\nExiting ...");
966 cout << endl << "Exiting ..." << endl;
970 // Initialize the Window/Graphics environment.
971 if( !fgGlutInit(&argc, argv) ) {
972 FG_LOG( FG_GENERAL, FG_ALERT, "GLUT initialization failed ..." );
976 // Initialize the various GLUT Event Handlers.
977 if( !fgGlutInitEvents() ) {
978 FG_LOG( FG_GENERAL, FG_ALERT,
979 "GLUT event handler initialization failed ..." );
983 // First do some quick general initializations
984 if( !fgInitGeneral()) {
985 FG_LOG( FG_GENERAL, FG_ALERT,
986 "General initializations failed ..." );
990 // Init the user interface (we need to do this before passing off
994 // pass control off to the master GLUT event handler
997 // we never actually get here ... but just in case ... :-)
1003 // Revision 1.79 1999/01/08 03:23:56 curt
1004 // Beginning work on compensating for sim time vs. real world time "jitter".
1006 // Revision 1.78 1999/01/07 20:25:08 curt
1007 // Updated struct fgGENERAL to class FGGeneral.
1009 // Revision 1.77 1998/12/18 23:40:55 curt
1010 // New frame rate counting mechanism.
1012 // Revision 1.76 1998/12/11 20:26:26 curt
1013 // Fixed view frustum culling accuracy bug so we can look out the sides and
1014 // back without tri-stripes dropping out.
1016 // Revision 1.75 1998/12/09 18:50:23 curt
1017 // Converted "class fgVIEW" to "class FGView" and updated to make data
1018 // members private and make required accessor functions.
1020 // Revision 1.74 1998/12/06 14:52:54 curt
1021 // Fixed a problem with the initial starting altitude. "v->abs_view_pos" wasn't
1022 // being calculated correctly at the beginning causing the first terrain
1023 // intersection to fail, returning a ground altitude of zero, causing the plane
1024 // to free fall for one frame, until the ground altitude was corrected, but now
1025 // being under the ground we got a big bounce and the plane always ended up
1028 // Revision 1.73 1998/12/06 13:51:22 curt
1029 // Turned "struct fgWEATHER" into "class FGWeather".
1031 // Revision 1.72 1998/12/05 15:54:18 curt
1032 // Renamed class fgFLIGHT to class FGState as per request by JSB.
1034 // Revision 1.71 1998/12/05 14:19:51 curt
1035 // Looking into a problem with cur_view_params.abs_view_pos initialization.
1037 // Revision 1.70 1998/12/03 01:17:14 curt
1038 // Converted fgFLIGHT to a class.
1040 // Revision 1.69 1998/11/23 20:51:26 curt
1041 // Fiddling with when I can get info from the opengl driver.
1043 // Revision 1.68 1998/11/20 01:02:35 curt
1044 // Try to detect Mesa/Glide/Voodoo and chose the appropriate resolution.
1046 // Revision 1.67 1998/11/16 13:59:58 curt
1047 // Added pow() macro bug work around.
1048 // Added support for starting FGFS at various resolutions.
1049 // Added some initial serial port support.
1050 // Specify default log levels in main().
1052 // Revision 1.66 1998/11/11 00:24:00 curt
1053 // Added Michael Johnson's audio patches for testing.
1054 // Also did a few tweaks to avoid numerical problems when starting at a place
1055 // with no (or bogus) scenery.
1057 // Revision 1.65 1998/11/09 23:39:22 curt
1058 // Tweaks for the instrument panel.
1060 // Revision 1.64 1998/11/07 19:07:09 curt
1061 // Enable release builds using the --without-logging option to the configure
1062 // script. Also a couple log message cleanups, plus some C to C++ comment
1065 // Revision 1.63 1998/11/06 21:18:08 curt
1066 // Converted to new logstream debugging facility. This allows release
1067 // builds with no messages at all (and no performance impact) by using
1068 // the -DFG_NDEBUG flag.
1070 // Revision 1.62 1998/10/27 02:14:35 curt
1071 // Changes to support GLUT joystick routines as fall back.
1073 // Revision 1.61 1998/10/25 14:08:47 curt
1074 // Turned "struct fgCONTROLS" into a class, with inlined accessor functions.
1076 // Revision 1.60 1998/10/25 10:57:18 curt
1077 // Changes to use the new joystick library if it is available.
1079 // Revision 1.59 1998/10/17 01:34:21 curt
1082 // Revision 1.58 1998/10/16 23:27:52 curt
1085 // Revision 1.57 1998/10/16 00:54:00 curt
1086 // Converted to Point3D class.
1088 // Revision 1.56 1998/10/02 12:46:47 curt
1089 // Added an "auto throttle"
1091 // Revision 1.55 1998/09/29 14:58:18 curt
1092 // Use working() instead of !not_working() for audio.
1094 // Revision 1.54 1998/09/29 02:03:38 curt
1097 // Revision 1.53 1998/09/26 13:18:35 curt
1098 // Check if audio "working()" before doing audio manipulations.
1100 // Revision 1.52 1998/09/25 16:02:07 curt
1101 // Added support for pitch and volume envelopes and tied them to the
1102 // throttle setting.
1104 // Revision 1.51 1998/09/15 04:27:28 curt
1105 // Changes for new Astro code.
1107 // Revision 1.50 1998/09/15 02:09:24 curt
1108 // Include/fg_callback.hxx
1109 // Moved code inline to stop g++ 2.7 from complaining.
1111 // Simulator/Time/event.[ch]xx
1112 // Changed return type of fgEVENT::printStat(). void caused g++ 2.7 to
1113 // complain bitterly.
1115 // Minor bugfix and changes.
1117 // Simulator/Main/GLUTmain.cxx
1118 // Added missing type to idle_state definition - eliminates a warning.
1120 // Simulator/Main/fg_init.cxx
1121 // Changes to airport lookup.
1123 // Simulator/Main/options.cxx
1124 // Uses fg_gzifstream when loading config file.
1126 // Revision 1.49 1998/09/09 16:25:39 curt
1127 // Only use GLUT_STENCIL if the instument panel has been requested.
1129 // Revision 1.48 1998/08/28 18:15:03 curt
1130 // Added new cockpit code from Friedemann Reinhard
1131 // <mpt218@faupt212.physik.uni-erlangen.de>
1133 // Revision 1.47 1998/08/27 17:02:04 curt
1134 // Contributions from Bernie Bright <bbright@c031.aone.net.au>
1135 // - use strings for fg_root and airport_id and added methods to return
1137 // - inlined all access methods,
1138 // - made the parsing functions private methods,
1139 // - deleted some unused functions.
1140 // - propogated some of these changes out a bit further.
1142 // Revision 1.46 1998/08/22 14:49:56 curt
1143 // Attempting to iron out seg faults and crashes.
1144 // Did some shuffling to fix a initialization order problem between view
1145 // position, scenery elevation.
1147 // Revision 1.45 1998/08/20 20:32:31 curt
1148 // Reshuffled some of the code in and around views.[ch]xx
1150 // Revision 1.44 1998/08/20 15:10:33 curt
1151 // Added GameGLUT support.
1153 // Revision 1.43 1998/08/12 21:01:47 curt
1154 // Master volume from 30% -> 80%
1156 // Revision 1.42 1998/07/30 23:48:25 curt
1157 // Output position & orientation when pausing.
1158 // Eliminated libtool use.
1159 // Added options to specify initial position and orientation.
1160 // Changed default fov to 55 degrees.
1161 // Added command line option to start in paused or unpaused state.
1163 // Revision 1.41 1998/07/27 18:41:24 curt
1164 // Added a pause command "p"
1165 // Fixed some initialization order problems between pui and glut.
1166 // Added an --enable/disable-sound option.
1168 // Revision 1.40 1998/07/24 21:56:59 curt
1169 // Set near clip plane to 0.5 meters when close to the ground. Also, let the view get a bit closer to the ground before hitting the hard limit.
1171 // Revision 1.39 1998/07/24 21:39:08 curt
1172 // Debugging output tweaks.
1173 // Cast glGetString to (char *) to avoid compiler errors.
1174 // Optimizations to fgGluLookAt() by Norman Vine.
1176 // Revision 1.38 1998/07/22 21:40:43 curt
1177 // Clear to adjusted fog color (for sunrise/sunset effects)
1178 // Make call to fog sunrise/sunset adjustment method.
1179 // Add a stdc++ library bug work around to fg_init.cxx
1181 // Revision 1.37 1998/07/20 12:49:44 curt
1182 // Tweaked color buffer clearing defaults. We clear the color buffer if we
1183 // are doing textures. Assumptions: If we are doing textures we have hardware
1184 // support that can clear the color buffer for "free." If we are doing software
1185 // rendering with textures, then the extra clear time gets lost in the noise.
1187 // Revision 1.36 1998/07/16 17:33:35 curt
1188 // "H" / "h" now control hud brightness as well with off being one of the
1190 // Better checking for xmesa/fx 3dfx fullscreen/window support for deciding
1191 // whether or not to build in the feature.
1192 // Translucent menu support.
1193 // HAVE_AUDIO_SUPPORT -> ENABLE_AUDIO_SUPPORT
1194 // Use fork() / wait() for playing mp3 init music in background under unix.
1195 // Changed default tile diameter to 5.
1197 // Revision 1.35 1998/07/13 21:01:36 curt
1198 // Wrote access functions for current fgOPTIONS.
1200 // Revision 1.34 1998/07/13 15:32:37 curt
1201 // Clear color buffer if drawing wireframe.
1202 // When specifying and airport, start elevation at -1000 and let the system
1203 // position you at ground level.
1205 // Revision 1.33 1998/07/12 03:14:42 curt
1206 // Added ground collision detection.
1207 // Did some serious horsing around to be able to "hug" the ground properly
1208 // and still be able to take off.
1209 // Set the near clip plane to 1.0 meters when less than 10 meters above the
1211 // Did some serious horsing around getting the initial airplane position to be
1212 // correct based on rendered terrain elevation.
1213 // Added a little cheat/hack that will prevent the view position from ever
1214 // dropping below the terrain, even when the flight model doesn't quite
1215 // put you as high as you'd like.
1217 // Revision 1.32 1998/07/08 14:45:07 curt
1218 // polar3d.h renamed to polar3d.hxx
1219 // vector.h renamed to vector.hxx
1220 // updated audio support so it waits to create audio classes (and tie up
1221 // /dev/dsp) until the mpg123 player is finished.
1223 // Revision 1.31 1998/07/06 21:34:17 curt
1224 // Added an enable/disable splash screen option.
1225 // Added an enable/disable intro music option.
1226 // Added an enable/disable instrument panel option.
1227 // Added an enable/disable mouse pointer option.
1228 // Added using namespace std for compilers that support this.
1230 // Revision 1.30 1998/07/06 02:42:03 curt
1231 // Added support for switching between fullscreen and window mode for
1234 // Added a basic splash screen. Restructured the main loop and top level
1235 // initialization routines to do this.
1237 // Hacked in some support for playing a startup mp3 sound file while rest
1238 // of sim initializes. Currently only works in Unix using the mpg123 player.
1239 // Waits for the mpg123 player to finish before initializing internal
1242 // Revision 1.29 1998/07/04 00:52:22 curt
1243 // Add my own version of gluLookAt() (which is nearly identical to the
1244 // Mesa/glu version.) But, by calculating the Model View matrix our selves
1245 // we can save this matrix without having to read it back in from the video
1246 // card. This hopefully allows us to save a few cpu cycles when rendering
1247 // out the fragments because we can just use glLoadMatrixd() with the
1248 // precalculated matrix for each tile rather than doing a push(), translate(),
1249 // pop() for every fragment.
1251 // Panel status defaults to off for now until it gets a bit more developed.
1253 // Extract OpenGL driver info on initialization.
1255 // Revision 1.28 1998/06/27 16:54:32 curt
1256 // Replaced "extern displayInstruments" with a entry in fgOPTIONS.
1257 // Don't change the view port when displaying the panel.
1259 // Revision 1.27 1998/06/17 21:35:10 curt
1260 // Refined conditional audio support compilation.
1261 // Moved texture parameter setup calls to ../Scenery/materials.cxx
1262 // #include <string.h> before various STL includes.
1263 // Make HUD default state be enabled.
1265 // Revision 1.26 1998/06/13 00:40:32 curt
1266 // Tweaked fog command line options.
1268 // Revision 1.25 1998/06/12 14:27:26 curt
1269 // Pui -> PUI, Gui -> GUI.
1271 // Revision 1.24 1998/06/12 00:57:39 curt
1272 // Added support for Pui/Gui.
1273 // Converted fog to GL_FOG_EXP2.
1274 // Link to static simulator parts.
1275 // Update runfg.bat to try to be a little smarter.
1277 // Revision 1.23 1998/06/08 17:57:04 curt
1278 // Minor sound/startup position tweaks.
1280 // Revision 1.22 1998/06/05 18:18:40 curt
1281 // A bit of fiddling with audio ...
1283 // Revision 1.21 1998/06/03 22:01:06 curt
1284 // Tweaking sound library usage.
1286 // Revision 1.20 1998/06/03 00:47:11 curt
1287 // Updated to compile in audio support if OSS available.
1288 // Updated for new version of Steve's audio library.
1289 // STL includes don't use .h
1290 // Small view optimizations.
1292 // Revision 1.19 1998/06/01 17:54:40 curt
1293 // Added Linux audio support.
1294 // avoid glClear( COLOR_BUFFER_BIT ) when not using it to set the sky color.
1297 // Revision 1.18 1998/05/29 20:37:19 curt
1298 // Tweaked material properties & lighting a bit in GLUTmain.cxx.
1299 // Read airport list into a "map" STL for dynamic list sizing and fast tree
1302 // Revision 1.17 1998/05/22 21:28:52 curt
1303 // Modifications to use the new fgEVENT_MGR class.
1305 // Revision 1.16 1998/05/20 20:51:33 curt
1306 // Tweaked smooth shaded texture lighting properties.
1307 // Converted fgLIGHT to a C++ class.
1309 // Revision 1.15 1998/05/16 13:08:34 curt
1310 // C++ - ified views.[ch]xx
1311 // Shuffled some additional view parameters into the fgVIEW class.
1312 // Changed tile-radius to tile-diameter because it is a much better
1314 // Added a WORLD_TO_EYE transformation to views.cxx. This allows us
1315 // to transform world space to eye space for view frustum culling.
1317 // Revision 1.14 1998/05/13 18:29:57 curt
1318 // Added a keyboard binding to dynamically adjust field of view.
1319 // Added a command line option to specify fov.
1320 // Adjusted terrain color.
1321 // Root path info moved to fgOPTIONS.
1322 // Added ability to parse options out of a config file.
1324 // Revision 1.13 1998/05/11 18:18:15 curt
1325 // For flat shading use "glHint (GL_FOG_HINT, GL_FASTEST )"
1327 // Revision 1.12 1998/05/07 23:14:15 curt
1328 // Added "D" key binding to set autopilot heading.
1329 // Made frame rate calculation average out over last 10 frames.
1330 // Borland C++ floating point exception workaround.
1331 // Added a --tile-radius=n option.
1333 // Revision 1.11 1998/05/06 03:16:23 curt
1334 // Added an averaged global frame rate counter.
1335 // Added an option to control tile radius.
1337 // Revision 1.10 1998/05/03 00:47:31 curt
1338 // Added an option to enable/disable full-screen mode.
1340 // Revision 1.9 1998/04/30 12:34:17 curt
1341 // Added command line rendering options:
1342 // enable/disable fog/haze
1343 // specify smooth/flat shading
1344 // disable sky blending and just use a solid color
1345 // enable wireframe drawing mode
1347 // Revision 1.8 1998/04/28 01:20:21 curt
1348 // Type-ified fgTIME and fgVIEW.
1349 // Added a command line option to disable textures.
1351 // Revision 1.7 1998/04/26 05:10:02 curt
1352 // "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
1354 // Revision 1.6 1998/04/25 22:06:30 curt
1355 // Edited cvs log messages in source files ... bad bad bad!
1357 // Revision 1.5 1998/04/25 20:24:01 curt
1358 // Cleaned up initialization sequence to eliminate interdependencies
1359 // between sun position, lighting, and view position. This creates a
1360 // valid single pass initialization path.
1362 // Revision 1.4 1998/04/24 14:19:30 curt
1365 // Revision 1.3 1998/04/24 00:49:18 curt
1366 // Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
1367 // Trying out some different option parsing code.
1368 // Some code reorganization.
1370 // Revision 1.2 1998/04/22 13:25:41 curt
1371 // C++ - ifing the code.
1372 // Starting a bit of reorganization of lighting code.
1374 // Revision 1.1 1998/04/21 17:02:39 curt
1375 // Prepairing for C++ integration.
1377 // Revision 1.71 1998/04/18 04:11:26 curt
1378 // Moved fg_debug to it's own library, added zlib support.
1380 // Revision 1.70 1998/04/14 02:21:02 curt
1381 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
1382 // <jgoeke@voyager.net>
1384 // Revision 1.69 1998/04/08 23:35:34 curt
1385 // Tweaks to Gnu automake/autoconf system.
1387 // Revision 1.68 1998/04/03 22:09:03 curt
1388 // Converting to Gnu autoconf system.
1390 // Revision 1.67 1998/03/23 21:24:37 curt
1391 // Source code formating tweaks.
1393 // Revision 1.66 1998/03/14 00:31:20 curt
1394 // Beginning initial terrain texturing experiments.
1396 // Revision 1.65 1998/03/09 22:45:57 curt
1397 // Minor tweaks for building on sparc platform.
1399 // Revision 1.64 1998/02/20 00:16:23 curt
1400 // Thursday's tweaks.
1402 // Revision 1.63 1998/02/16 16:17:39 curt
1405 // Revision 1.62 1998/02/16 13:39:42 curt
1406 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
1407 // tiles to occasionally be missing.
1409 // Revision 1.61 1998/02/12 21:59:46 curt
1410 // Incorporated code changes contributed by Charlie Hotchkiss
1411 // <chotchkiss@namg.us.anritsu.com>
1413 // Revision 1.60 1998/02/11 02:50:40 curt
1416 // Revision 1.59 1998/02/09 22:56:54 curt
1417 // Removed "depend" files from cvs control. Other minor make tweaks.
1419 // Revision 1.58 1998/02/09 15:07:49 curt
1422 // Revision 1.57 1998/02/07 15:29:40 curt
1423 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
1424 // <chotchkiss@namg.us.anritsu.com>
1426 // Revision 1.56 1998/02/03 23:20:23 curt
1427 // Lots of little tweaks to fix various consistency problems discovered by
1428 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
1429 // passed arguments along to the real printf(). Also incorporated HUD changes
1430 // by Michele America.
1432 // Revision 1.55 1998/02/02 20:53:58 curt
1433 // Incorporated Durk's changes.
1435 // Revision 1.54 1998/01/31 00:43:10 curt
1436 // Added MetroWorks patches from Carmen Volpe.
1438 // Revision 1.53 1998/01/27 18:35:54 curt
1441 // Revision 1.52 1998/01/27 00:47:56 curt
1442 // Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
1443 // system and commandline/config file processing code.
1445 // Revision 1.51 1998/01/26 15:57:05 curt
1446 // Tweaks for dynamic scenery development.
1448 // Revision 1.50 1998/01/19 19:27:07 curt
1449 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
1450 // This should simplify things tremendously.
1452 // Revision 1.49 1998/01/19 18:40:31 curt
1453 // Tons of little changes to clean up the code and to remove fatal errors
1454 // when building with the c++ compiler.
1456 // Revision 1.48 1998/01/19 18:35:46 curt
1457 // Minor tweaks and fixes for cygwin32.
1459 // Revision 1.47 1998/01/13 00:23:08 curt
1460 // Initial changes to support loading and management of scenery tiles. Note,
1461 // there's still a fair amount of work left to be done.
1463 // Revision 1.46 1998/01/08 02:22:06 curt
1464 // Beginning to integrate Tile management subsystem.
1466 // Revision 1.45 1998/01/07 03:18:55 curt
1467 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
1469 // Revision 1.44 1997/12/30 22:22:31 curt
1470 // Further integration of event manager.
1472 // Revision 1.43 1997/12/30 20:47:43 curt
1473 // Integrated new event manager with subsystem initializations.
1475 // Revision 1.42 1997/12/30 16:36:47 curt
1476 // Merged in Durk's changes ...
1478 // Revision 1.41 1997/12/30 13:06:56 curt
1479 // A couple lighting tweaks ...
1481 // Revision 1.40 1997/12/30 01:38:37 curt
1482 // Switched back to per vertex normals and smooth shading for terrain.
1484 // Revision 1.39 1997/12/22 23:45:45 curt
1485 // First stab at sunset/sunrise sky glow effects.
1487 // Revision 1.38 1997/12/22 04:14:28 curt
1488 // Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
1490 // Revision 1.37 1997/12/19 23:34:03 curt
1491 // Lot's of tweaking with sky rendering and lighting.
1493 // Revision 1.36 1997/12/19 16:44:57 curt
1494 // Working on scene rendering order and options.
1496 // Revision 1.35 1997/12/18 23:32:32 curt
1497 // First stab at sky dome actually starting to look reasonable. :-)
1499 // Revision 1.34 1997/12/17 23:13:34 curt
1500 // Began working on rendering a sky.
1502 // Revision 1.33 1997/12/15 23:54:45 curt
1503 // Add xgl wrappers for debugging.
1504 // Generate terrain normals on the fly.
1506 // Revision 1.32 1997/12/15 20:59:08 curt
1509 // Revision 1.31 1997/12/12 21:41:25 curt
1510 // More light/material property tweaking ... still a ways off.
1512 // Revision 1.30 1997/12/12 19:52:47 curt
1513 // Working on lightling and material properties.
1515 // Revision 1.29 1997/12/11 04:43:54 curt
1516 // Fixed sun vector and lighting problems. I thing the moon is now lit
1519 // Revision 1.28 1997/12/10 22:37:45 curt
1520 // Prepended "fg" on the name of all global structures that didn't have it yet.
1521 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
1523 // Revision 1.27 1997/12/09 05:11:54 curt
1524 // Working on tweaking lighting.
1526 // Revision 1.26 1997/12/09 04:25:29 curt
1527 // Working on adding a global lighting params structure.
1529 // Revision 1.25 1997/12/08 22:54:09 curt
1530 // Enabled GL_CULL_FACE.
1532 // Revision 1.24 1997/11/25 19:25:32 curt
1533 // Changes to integrate Durk's moon/sun code updates + clean up.
1535 // Revision 1.23 1997/11/15 18:16:34 curt
1538 // Revision 1.22 1997/10/30 12:38:41 curt
1539 // Working on new scenery subsystem.
1541 // Revision 1.21 1997/09/23 00:29:38 curt
1542 // Tweaks to get things to compile with gcc-win32.
1544 // Revision 1.20 1997/09/22 14:44:19 curt
1545 // Continuing to try to align stars correctly.
1547 // Revision 1.19 1997/09/18 16:20:08 curt
1548 // At dusk/dawn add/remove stars in stages.
1550 // Revision 1.18 1997/09/16 22:14:51 curt
1551 // Tweaked time of day lighting equations. Don't draw stars during the day.
1553 // Revision 1.17 1997/09/16 15:50:29 curt
1554 // Working on star alignment and time issues.
1556 // Revision 1.16 1997/09/13 02:00:06 curt
1557 // Mostly working on stars and generating sidereal time for accurate star
1560 // Revision 1.15 1997/09/05 14:17:27 curt
1561 // More tweaking with stars.
1563 // Revision 1.14 1997/09/05 01:35:53 curt
1564 // Working on getting stars right.
1566 // Revision 1.13 1997/09/04 02:17:34 curt
1569 // Revision 1.12 1997/08/27 21:32:24 curt
1570 // Restructured view calculation code. Added stars.
1572 // Revision 1.11 1997/08/27 03:30:16 curt
1573 // Changed naming scheme of basic shared structures.
1575 // Revision 1.10 1997/08/25 20:27:22 curt
1576 // Merged in initial HUD and Joystick code.
1578 // Revision 1.9 1997/08/22 21:34:39 curt
1579 // Doing a bit of reorganizing and house cleaning.
1581 // Revision 1.8 1997/08/19 23:55:03 curt
1582 // Worked on better simulating real lighting.
1584 // Revision 1.7 1997/08/16 12:22:38 curt
1585 // Working on improving the lighting/shading.
1587 // Revision 1.6 1997/08/13 20:24:56 curt
1588 // Changes due to changing sunpos interface.
1590 // Revision 1.5 1997/08/06 21:08:32 curt
1591 // Sun position now really* works (I think) ... I still have sun time warping
1592 // code in place, probably should remove it soon.
1594 // Revision 1.4 1997/08/06 15:41:26 curt
1595 // Working on correct sun position.
1597 // Revision 1.3 1997/08/06 00:24:22 curt
1598 // Working on correct real time sun lighting.
1600 // Revision 1.2 1997/08/04 20:25:15 curt
1601 // Organizational tweaking.
1603 // Revision 1.1 1997/08/02 18:45:00 curt
1604 // Renamed GLmain.c GLUTmain.c
1606 // Revision 1.43 1997/08/02 16:23:47 curt
1609 // Revision 1.42 1997/08/01 19:43:33 curt
1610 // Making progress with coordinate system overhaul.
1612 // Revision 1.41 1997/07/31 22:52:37 curt
1613 // Working on redoing internal coordinate systems & scenery transformations.
1615 // Revision 1.40 1997/07/30 16:12:42 curt
1616 // Moved fg_random routines from Util/ to Math/
1618 // Revision 1.39 1997/07/21 14:45:01 curt
1621 // Revision 1.38 1997/07/19 23:04:47 curt
1622 // Added an initial weather section.
1624 // Revision 1.37 1997/07/19 22:34:02 curt
1625 // Moved PI definitions to ../constants.h
1626 // Moved random() stuff to ../Utils/ and renamed fg_random()
1628 // Revision 1.36 1997/07/18 23:41:25 curt
1629 // Tweaks for building with Cygnus Win32 compiler.
1631 // Revision 1.35 1997/07/18 14:28:34 curt
1632 // Hacked in some support for wind/turbulence.
1634 // Revision 1.34 1997/07/16 20:04:48 curt
1635 // Minor tweaks to aid Win32 port.
1637 // Revision 1.33 1997/07/12 03:50:20 curt
1638 // Added an #include <Windows32/Base.h> to help compiling for Win32
1640 // Revision 1.32 1997/07/11 03:23:18 curt
1641 // Solved some scenery display/orientation problems. Still have a positioning
1642 // (or transformation?) problem.
1644 // Revision 1.31 1997/07/11 01:29:58 curt
1645 // More tweaking of terrian floor.
1647 // Revision 1.30 1997/07/10 04:26:37 curt
1648 // We now can interpolated ground elevation for any position in the grid. We
1649 // can use this to enforce a "hard" ground. We still need to enforce some
1650 // bounds checking so that we don't try to lookup data points outside the
1653 // Revision 1.29 1997/07/09 21:31:12 curt
1654 // Working on making the ground "hard."
1656 // Revision 1.28 1997/07/08 18:20:12 curt
1657 // Working on establishing a hard ground.
1659 // Revision 1.27 1997/07/07 20:59:49 curt
1660 // Working on scenery transformations to enable us to fly fluidly over the
1661 // poles with no discontinuity/distortion in scenery.
1663 // Revision 1.26 1997/07/05 20:43:34 curt
1664 // renamed mat3 directory to Math so we could add other math related routines.
1666 // Revision 1.25 1997/06/29 21:19:17 curt
1667 // Working on scenery management system.
1669 // Revision 1.24 1997/06/26 22:14:53 curt
1670 // Beginning work on a scenery management system.
1672 // Revision 1.23 1997/06/26 19:08:33 curt
1673 // Restructuring make, adding automatic "make dep" support.
1675 // Revision 1.22 1997/06/25 15:39:47 curt
1676 // Minor changes to compile with rsxnt/win32.
1678 // Revision 1.21 1997/06/22 21:44:41 curt
1679 // Working on intergrating the VRML (subset) parser.
1681 // Revision 1.20 1997/06/21 17:12:53 curt
1682 // Capitalized subdirectory names.
1684 // Revision 1.19 1997/06/18 04:10:31 curt
1685 // A couple more runway tweaks ...
1687 // Revision 1.18 1997/06/18 02:21:24 curt
1688 // Hacked in a runway
1690 // Revision 1.17 1997/06/17 16:51:58 curt
1691 // Timer interval stuff now uses gettimeofday() instead of ftime()
1693 // Revision 1.16 1997/06/17 04:19:16 curt
1694 // More timer related tweaks with respect to view direction changes.
1696 // Revision 1.15 1997/06/17 03:41:10 curt
1697 // Nonsignal based interval timing is now working.
1698 // This would be a good time to look at cleaning up the code structure a bit.
1700 // Revision 1.14 1997/06/16 19:32:51 curt
1701 // Starting to add general timer support.
1703 // Revision 1.13 1997/06/02 03:40:06 curt
1704 // A tiny bit more view tweaking.
1706 // Revision 1.12 1997/06/02 03:01:38 curt
1707 // Working on views (side, front, back, transitions, etc.)
1709 // Revision 1.11 1997/05/31 19:16:25 curt
1710 // Elevator trim added.
1712 // Revision 1.10 1997/05/31 04:13:52 curt
1713 // WE CAN NOW FLY!!!
1715 // Continuing work on the LaRCsim flight model integration.
1716 // Added some MSFS-like keyboard input handling.
1718 // Revision 1.9 1997/05/30 19:27:01 curt
1719 // The LaRCsim flight model is starting to look like it is working.
1721 // Revision 1.8 1997/05/30 03:54:10 curt
1722 // Made a bit more progress towards integrating the LaRCsim flight model.
1724 // Revision 1.7 1997/05/29 22:39:49 curt
1725 // Working on incorporating the LaRCsim flight model.
1727 // Revision 1.6 1997/05/29 12:31:39 curt
1728 // Minor tweaks, moving towards general flight model integration.
1730 // Revision 1.5 1997/05/29 02:33:23 curt
1731 // Updated to reflect changing interfaces in other "modules."
1733 // Revision 1.4 1997/05/27 17:44:31 curt
1734 // Renamed & rearranged variables and routines. Added some initial simple
1735 // timer/alarm routines so the flight model can be updated on a regular
1738 // Revision 1.3 1997/05/23 15:40:25 curt
1739 // Added GNU copyright headers.
1742 // Revision 1.2 1997/05/23 00:35:12 curt
1743 // Trying to get fog to work ...
1745 // Revision 1.1 1997/05/21 15:57:51 curt
1746 // Renamed due to added GLUT support.
1748 // Revision 1.3 1997/05/19 18:22:42 curt
1749 // Parameter tweaking ... starting to stub in fog support.
1751 // Revision 1.2 1997/05/17 00:17:34 curt
1752 // Trying to stub in support for standard OpenGL.
1754 // Revision 1.1 1997/05/16 16:05:52 curt
1755 // Initial revision.