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 #ifdef HAVE_SYS_STAT_H
46 # include <sys/stat.h> /* for stat() */
50 # include <unistd.h> /* for stat() */
53 #include <Include/fg_constants.h> // for VERSION
54 #include <Include/general.hxx>
56 #include <Aircraft/aircraft.hxx>
57 #include <Astro/sky.hxx>
58 #include <Astro/stars.hxx>
59 #include <Astro/solarsystem.hxx>
61 #ifdef ENABLE_AUDIO_SUPPORT
62 # include <Audio/src/sl.h>
63 # include <Audio/src/sm.h>
66 #include <Autopilot/autopilot.hxx>
67 #include <Cockpit/cockpit.hxx>
68 #include <Debug/logstream.hxx>
70 #include <Joystick/joystick.hxx>
71 #include <Math/fg_geodesy.hxx>
72 #include <Math/mat3.h>
73 #include <Math/polar3d.hxx>
75 #include <Scenery/scenery.hxx>
76 #include <Scenery/tilemgr.hxx>
77 #include <Time/event.hxx>
78 #include <Time/fg_time.hxx>
79 #include <Time/fg_timer.hxx>
80 #include <Time/sunpos.hxx>
81 #include <Weather/weather.hxx>
83 #include "GLUTkey.hxx"
84 #include "fg_init.hxx"
85 #include "options.hxx"
90 // This is a record containing a bit of global housekeeping information
93 // Specify our current idle function state. This is used to run all
94 // our initializations out of the glutIdleLoop() so that we can get a
95 // splash screen up and running right away.
96 static int idle_state = 0;
101 // Yet another hack, this time for the panel
104 // Global structures for the Audio library
105 #ifdef ENABLE_AUDIO_SUPPORT
106 slEnvelope pitch_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
107 slEnvelope volume_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
108 slScheduler *audio_sched;
109 smMixer *audio_mixer;
115 // The following defines flight gear options. Because glutlib will also
116 // want to parse its own options, those options must not be included here
117 // or they will get parsed by the main program option parser. Hence case
118 // is significant for any option added that might be in conflict with
121 // glutlib parses for:
123 // -direct (invalid in Win32)
127 // -indirect (invalid in Win32)
130 // Note that glutlib depends upon strings while this program's
131 // option parser wants only initial characters followed by numbers
136 // fgInitVisuals() -- Initialize various GL/view parameters
137 static void fgInitVisuals( void ) {
140 l = &cur_light_params;
142 // Go full screen if requested ...
143 if ( current_options.get_fullscreen() ) {
147 // If enabled, normal vectors specified with glNormal are scaled
148 // to unit length after transformation. See glNormal.
149 // xglEnable( GL_NORMALIZE );
151 xglEnable( GL_LIGHTING );
152 xglEnable( GL_LIGHT0 );
153 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
155 // xglFogi (GL_FOG_MODE, GL_LINEAR);
156 xglFogi (GL_FOG_MODE, GL_EXP2);
157 // Fog density is now set when the weather system is initialized
158 // xglFogf (GL_FOG_DENSITY, w->fog_density);
159 if ( (current_options.get_fog() == 1) ||
160 (current_options.get_shading() == 0) ) {
161 // if fastest fog requested, or if flat shading force fastest
162 xglHint ( GL_FOG_HINT, GL_FASTEST );
163 } else if ( current_options.get_fog() == 2 ) {
164 xglHint ( GL_FOG_HINT, GL_NICEST );
166 if ( current_options.get_wireframe() ) {
168 xglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
171 // This is the default anyways, but it can't hurt
172 xglFrontFace ( GL_CCW );
175 // xglEnable(GL_POINT_SMOOTH);
176 // xglEnable(GL_LINE_SMOOTH);
177 // xglEnable(GL_POLYGON_SMOOTH);
182 // Draw a basic instrument panel
183 static void fgUpdateInstrViewParams( void ) {
187 fgVIEW *v = ¤t_view;
189 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) / 2);
191 xglMatrixMode(GL_PROJECTION);
195 gluOrtho2D(0, 640, 0, 480);
196 xglMatrixMode(GL_MODELVIEW);
200 xglColor3f(1.0, 1.0, 1.0);
203 xglDisable(GL_DEPTH_TEST);
204 xglDisable(GL_LIGHTING);
207 xglColor3f (0.5, 0.5, 0.5);
210 xglVertex2f(0.0, 0.00);
211 xglVertex2f(0.0, 480.0);
212 xglVertex2f(640.0,480.0);
213 xglVertex2f(640.0, 0.0);
216 xglRectf(0.0,0.0, 640, 480);
217 xglEnable(GL_DEPTH_TEST);
218 xglEnable(GL_LIGHTING);
219 xglMatrixMode(GL_PROJECTION);
221 xglMatrixMode(GL_MODELVIEW);
227 // Update all Visuals (redraws anything graphics related)
228 static void fgRenderFrame( void ) {
229 fgLIGHT *l = &cur_light_params;
230 fgTIME *t = &cur_time_params;
231 FGView *v = ¤t_view;
234 static int iteration = 0;
235 // GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
236 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
237 GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
238 GLbitfield clear_mask;
240 if ( idle_state != 1000 ) {
241 // still initializing, draw the splash screen
242 if ( current_options.get_splash_screen() == 1 ) {
246 // idle_state is now 1000 meaning we've finished all our
247 // initializations and are running the main loop, so this will
248 // now work without seg faulting the system.
250 // printf("Ground = %.2f Altitude = %.2f\n", scenery.cur_elev,
251 // FG_Altitude * FEET_TO_METER);
253 // this is just a temporary hack, to make me understand Pui
254 // timerText -> setLabel (ctime (&t->cur_time));
257 // update view volume parameters
258 v->UpdateViewParams();
260 // set the sun position
261 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
263 clear_mask = GL_DEPTH_BUFFER_BIT;
264 if ( current_options.get_wireframe() ) {
265 clear_mask |= GL_COLOR_BUFFER_BIT;
267 if ( current_options.get_panel_status() ) {
268 // we can't clear the screen when the panel is active
269 } else if ( current_options.get_skyblend() ) {
270 if ( current_options.get_textures() ) {
271 // glClearColor(black[0], black[1], black[2], black[3]);
272 glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
273 l->adj_fog_color[2], l->adj_fog_color[3]);
274 clear_mask |= GL_COLOR_BUFFER_BIT;
277 glClearColor(l->sky_color[0], l->sky_color[1],
278 l->sky_color[2], l->sky_color[3]);
279 clear_mask |= GL_COLOR_BUFFER_BIT;
281 xglClear( clear_mask );
283 // Tell GL we are switching to model view parameters
284 xglMatrixMode(GL_MODELVIEW);
285 // xglLoadIdentity();
288 xglDisable( GL_DEPTH_TEST );
289 xglDisable( GL_LIGHTING );
290 xglDisable( GL_CULL_FACE );
291 xglDisable( GL_FOG );
292 xglShadeModel( GL_SMOOTH );
293 if ( current_options.get_skyblend() ) {
297 // setup transformation for drawing astronomical objects
299 // Translate to view position
300 Point3D view_pos = v->get_view_pos();
301 xglTranslatef( view_pos.x(), view_pos.y(), view_pos.z() );
302 // Rotate based on gst (sidereal time)
303 // note: constant should be 15.041085, Curt thought it was 15
304 angle = t->gst * 15.041085;
305 // printf("Rotating astro objects by %.2f degrees\n",angle);
306 xglRotatef( angle, 0.0, 0.0, -1.0 );
308 // draw stars and planets
310 SolarSystem::theSolarSystem->draw();
315 if ( current_options.get_shading() ) {
316 xglShadeModel( GL_SMOOTH );
318 xglShadeModel( GL_FLAT );
320 xglEnable( GL_DEPTH_TEST );
321 if ( current_options.get_fog() > 0 ) {
323 xglFogfv (GL_FOG_COLOR, l->adj_fog_color);
325 // set lighting parameters
326 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
327 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
329 if ( current_options.get_textures() ) {
330 // texture parameters
331 xglEnable( GL_TEXTURE_2D );
332 xglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
333 xglHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
334 // set base color (I don't think this is doing anything here)
335 xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
336 xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
338 xglDisable( GL_TEXTURE_2D );
339 xglMaterialfv (GL_FRONT, GL_AMBIENT, terrain_color);
340 xglMaterialfv (GL_FRONT, GL_DIFFUSE, terrain_color);
341 // xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
342 // xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
347 xglDisable( GL_TEXTURE_2D );
348 xglDisable( GL_FOG );
350 if ( (iteration == 0) && (current_options.get_panel_status()) ) {
351 // Did we run this loop before ?? ...and do we need the panel ??
352 fgPanelReInit(0, 0, 1024, 768);
355 // display HUD && Panel
357 iteration = 1; // don't ReInit the panel in the future
359 // We can do translucent menus, so why not. :-)
360 xglEnable ( GL_BLEND ) ;
361 xglBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
363 xglDisable ( GL_BLEND ) ;
371 // Update internal time dependent calculations (i.e. flight model)
372 void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
373 FGState *f = current_aircraft.fdm_state;
374 fgLIGHT *l = &cur_light_params;
375 fgTIME *t = &cur_time_params;
376 FGView *v = ¤t_view;
379 // update the flight model
380 if ( multi_loop < 0 ) {
381 multi_loop = DEFAULT_MULTILOOP;
385 // run Autopilot system
388 // printf("updating flight model x %d\n", multi_loop);
389 fgFlightModelUpdate( current_options.get_flight_model(),
390 cur_fdm_state, multi_loop, remainder );
392 fgFlightModelUpdate( current_options.get_flight_model(),
393 cur_fdm_state, 0, remainder );
396 // update the view angle
397 for ( i = 0; i < multi_loop; i++ ) {
398 if ( fabs(v->get_goal_view_offset() - v->get_view_offset()) < 0.05 ) {
399 v->set_view_offset( v->get_goal_view_offset() );
402 // move v->view_offset towards v->goal_view_offset
403 if ( v->get_goal_view_offset() > v->get_view_offset() ) {
404 if ( v->get_goal_view_offset() - v->get_view_offset() < FG_PI ){
405 v->inc_view_offset( 0.01 );
407 v->inc_view_offset( -0.01 );
410 if ( v->get_view_offset() - v->get_goal_view_offset() < FG_PI ){
411 v->inc_view_offset( -0.01 );
413 v->inc_view_offset( 0.01 );
416 if ( v->get_view_offset() > FG_2PI ) {
417 v->inc_view_offset( -FG_2PI );
418 } else if ( v->get_view_offset() < 0 ) {
419 v->inc_view_offset( FG_2PI );
424 double tmp = -(l->sun_rotation + FG_PI)
425 - (f->get_Psi() - v->get_view_offset() );
426 while ( tmp < 0.0 ) {
429 while ( tmp > FG_2PI ) {
432 /* printf("Psi = %.2f, viewoffset = %.2f sunrot = %.2f rottosun = %.2f\n",
433 FG_Psi * RAD_TO_DEG, v->view_offset * RAD_TO_DEG,
434 -(l->sun_rotation+FG_PI) * RAD_TO_DEG, tmp * RAD_TO_DEG); */
439 void fgInitTimeDepCalcs( void ) {
442 // #ifdef HAVE_SETITIMER
443 // fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
444 // #endif HAVE_SETITIMER
447 static const double alt_adjust_ft = 3.758099;
448 static const double alt_adjust_m = alt_adjust_ft * FEET_TO_METER;
450 // What should we do when we have nothing else to do? Let's get ready
451 // for the next move and update the display?
452 static void fgMainLoop( void ) {
455 static long remainder = 0;
456 long elapsed, multi_loop;
459 static time_t last_time = 0;
460 static int frames = 0;
462 f = current_aircraft.fdm_state;
463 t = &cur_time_params;
465 FG_LOG( FG_ALL, FG_DEBUG, "Running Main Loop");
466 FG_LOG( FG_ALL, FG_DEBUG, "======= ==== ====");
468 #if defined( ENABLE_LINUX_JOYSTICK )
469 // Read joystick and update control settings
471 #elif defined( ENABLE_GLUT_JOYSTICK )
472 // Glut joystick support works by feeding a joystick handler
473 // function to glut. This is taken care of once in the joystick
474 // init routine and we don't have to worry about it again.
477 current_weather.Update();
479 // Fix elevation. I'm just sticking this here for now, it should
480 // probably move eventually
482 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
484 f->get_Runway_altitude() * FEET_TO_METER,
485 f->get_Altitude() * FEET_TO_METER); */
487 if ( scenery.cur_elev > -9990 ) {
488 if ( f->get_Altitude() * FEET_TO_METER <
489 (scenery.cur_elev + alt_adjust_m - 3.0) ) {
490 // now set aircraft altitude above ground
491 printf("Current Altitude = %.2f < %.2f forcing to %.2f\n",
492 f->get_Altitude() * FEET_TO_METER,
493 scenery.cur_elev + alt_adjust_m - 3.0,
494 scenery.cur_elev + alt_adjust_m );
495 fgFlightModelSetAltitude( current_options.get_flight_model(),
496 scenery.cur_elev + alt_adjust_m );
498 FG_LOG( FG_ALL, FG_DEBUG,
499 "<*> resetting altitude to "
500 << f->get_Altitude() * FEET_TO_METER << " meters" );
502 f->set_Runway_altitude( scenery.cur_elev * METER_TO_FEET );
505 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
507 f->get_Runway_altitude() * FEET_TO_METER,
508 f->get_Altitude() * FEET_TO_METER); */
513 // Get elapsed time (in usec) for this past frame
514 elapsed = fgGetTimeInterval();
515 FG_LOG( FG_ALL, FG_DEBUG,
516 "Elapsed time interval is = " << elapsed
517 << ", previous remainder is = " << remainder );
519 // Calculate frame rate average
520 if ( (t->cur_time != last_time) && (last_time > 0) ) {
521 general.set_frame_rate( frames );
522 FG_LOG( FG_ALL, FG_DEBUG,
523 "--> Frame rate is = " << general.get_frame_rate() );
526 last_time = t->cur_time;
529 /* old fps calculation
532 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
533 accum += g->frames[i];
534 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
535 g->frames[i+1] = g->frames[i];
537 g->frames[0] = 1000.0 / (float)elapsed;
538 // printf("frame[0] = %.2f\n", g->frames[0]);
539 accum += g->frames[0];
540 g->frame_rate = accum / (float)FG_FRAME_RATE_HISTORY;
541 // printf("ave = %.2f\n", g->frame_rate);
546 if ( ! use_signals ) {
547 // Calculate model iterations needed for next frame
548 elapsed += remainder;
550 multi_loop = (int)(((double)elapsed * 0.000001) * DEFAULT_MODEL_HZ);
551 remainder = elapsed - ((multi_loop*1000000) / DEFAULT_MODEL_HZ);
552 FG_LOG( FG_ALL, FG_DEBUG,
553 "Model iterations needed = " << multi_loop
554 << ", new remainder = " << remainder );
557 if ( multi_loop > 0 ) {
558 fgUpdateTimeDepCalcs(multi_loop, remainder);
560 FG_LOG( FG_ALL, FG_INFO, "Elapsed time is zero ... we're zinging" );
564 // Do any serial port work that might need to be done
567 // see if we need to load any new scenery tiles
570 // Process/manage pending events
571 global_events.Process();
573 // Run audio scheduler
574 #ifdef ENABLE_AUDIO_SUPPORT
575 if ( current_options.get_sound() && audio_sched->working() ) {
577 # ifdef MICHAEL_JOHNSON_EXPERIMENTAL_ENGINE_AUDIO
579 // note: all these factors are relative to the sample. our
580 // sample format should really contain a conversion factor so
581 // that we can get prop speed right for arbitrary samples.
582 // Note that for normal-size props, there is a point at which
583 // the prop tips approach the speed of sound; that is a pretty
584 // strong limit to how fast the prop can go.
586 // multiplication factor is prime pitch control; add some log
587 // component for verisimilitude
589 double pitch = log((controls.get_throttle(0) * 14.0) + 1.0);
590 //fprintf(stderr, "pitch1: %f ", pitch);
591 if (controls.get_throttle(0) > 0.0 || f->v_rel_wind > 40.0) {
592 //fprintf(stderr, "rel_wind: %f ", f->v_rel_wind);
593 // only add relative wind and AoA if prop is moving
594 // or we're really flying at idle throttle
595 if (pitch < 5.4) { // this needs tuning
596 // prop tips not breaking sound barrier
597 pitch += log(f->v_rel_wind + 0.8)/2;
599 // prop tips breaking sound barrier
600 pitch += log(f->v_rel_wind + 0.8)/10;
602 //fprintf(stderr, "pitch2: %f ", pitch);
603 //fprintf(stderr, "AoA: %f ", FG_Gamma_vert_rad);
605 // Angle of Attack next... -x^3(e^x) is my best guess Just
606 // need to calculate some reasonable scaling factor and
607 // then clamp it on the positive aoa (neg adj) side
608 double aoa = f->get_Gamma_vert_rad() * 2.2;
610 double aoa_adj = pow(-aoa, tmp) * pow(M_E, aoa);
611 if (aoa_adj < -0.8) aoa_adj = -0.8;
613 //fprintf(stderr, "pitch3: %f ", pitch);
615 // don't run at absurdly slow rates -- not realistic
616 // and sounds bad to boot. :-)
617 if (pitch < 0.8) pitch = 0.8;
619 //fprintf(stderr, "pitch4: %f\n", pitch);
621 double volume = controls.get_throttle(0) * 1.15 + 0.3 +
622 log(f->v_rel_wind + 1.0)/14.0;
623 // fprintf(stderr, "volume: %f\n", volume);
625 pitch_envelope.setStep ( 0, 0.01, pitch );
626 volume_envelope.setStep ( 0, 0.01, volume );
630 double param = controls.get_throttle( 0 ) * 2.0 + 1.0;
631 pitch_envelope.setStep ( 0, 0.01, param );
632 volume_envelope.setStep ( 0, 0.01, param );
634 # endif // experimental throttle patch
636 audio_sched -> update();
643 FG_LOG( FG_ALL, FG_DEBUG, "" );
647 // This is the top level master main function that is registered as
651 // The first few passes take care of initialization things (a couple
652 // per pass) and once everything has been initialized fgMainLoop from
655 static void fgIdleFunction ( void ) {
656 // printf("idle state == %d\n", idle_state);
658 if ( idle_state == 0 ) {
659 // Initialize the splash screen right away
660 if ( current_options.get_splash_screen() ) {
665 } else if ( idle_state == 1 ) {
666 // Start the intro music
668 if ( current_options.get_intro_music() ) {
669 string lockfile = "/tmp/mpg123.running";
670 string mp3file = current_options.get_fg_root() +
672 string command = "(touch " + lockfile + "; mpg123 " + mp3file +
673 "> /dev/null 2>&1; /bin/rm " + lockfile + ") &";
674 FG_LOG( FG_GENERAL, FG_INFO,
675 "Starting intro music: " << mp3file );
676 system ( command.c_str() );
681 } else if ( idle_state == 2 ) {
682 // These are a few miscellaneous things that aren't really
683 // "subsystems" but still need to be initialized.
686 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
687 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
692 } else if ( idle_state == 3 ) {
693 // This is the top level init routine which calls all the
694 // other subsystem initialization routines. If you are adding
695 // a subsystem to flight gear, its initialization call should
696 // located in this routine.
697 if( !fgInitSubsystems()) {
698 FG_LOG( FG_GENERAL, FG_ALERT,
699 "Subsystem initializations failed ..." );
704 } else if ( idle_state == 4 ) {
705 // setup OpenGL view parameters
709 // init timer routines, signals, etc. Arrange for an alarm
710 // signal to be generated, etc.
711 fgInitTimeDepCalcs();
715 } else if ( idle_state == 5 ) {
718 } else if ( idle_state == 6 ) {
719 // Initialize audio support
720 #ifdef ENABLE_AUDIO_SUPPORT
723 if ( current_options.get_intro_music() ) {
724 // Let's wait for mpg123 to finish
725 string lockfile = "/tmp/mpg123.running";
726 struct stat stat_buf;
728 FG_LOG( FG_GENERAL, FG_INFO,
729 "Waiting for mpg123 player to finish ..." );
730 while ( stat(lockfile.c_str(), &stat_buf) == 0 ) {
731 // file exist, wait ...
733 FG_LOG( FG_GENERAL, FG_INFO, ".");
735 FG_LOG( FG_GENERAL, FG_INFO, "");
739 audio_sched = new slScheduler ( 8000 );
740 audio_mixer = new smMixer;
741 audio_mixer -> setMasterVolume ( 50 ) ; /* 80% of max volume. */
742 audio_sched -> setSafetyMargin ( 1.0 ) ;
743 string slfile = current_options.get_fg_root() + "/Sounds/wasp.wav";
745 s1 = new slSample ( (char *)slfile.c_str() );
746 FG_LOG( FG_GENERAL, FG_INFO,
747 "Rate = " << s1 -> getRate()
748 << " Bps = " << s1 -> getBps()
749 << " Stereo = " << s1 -> getStereo() );
750 audio_sched -> loopSample ( s1 );
752 if ( audio_sched->working() ) {
753 pitch_envelope.setStep ( 0, 0.01, 0.6 );
754 volume_envelope.setStep ( 0, 0.01, 0.6 );
756 audio_sched -> addSampleEnvelope( s1, 0, 0, &
759 audio_sched -> addSampleEnvelope( s1, 0, 1,
761 SL_VOLUME_ENVELOPE );
764 // strcpy(slfile, path);
765 // strcat(slfile, "thunder.wav");
766 // s2 -> loadFile ( slfile );
767 // s2 -> adjustVolume(0.5);
768 // audio_sched -> playSample ( s2 );
775 if ( idle_state == 1000 ) {
776 // We've finished all our initialization steps, from now on we
777 // run the main loop.
781 if ( current_options.get_splash_screen() == 1 ) {
788 // Handle new window size or exposure
789 static void fgReshape( int width, int height ) {
790 // Do this so we can call fgReshape(0,0) ourselves without having
791 // to know what the values of width & height are.
792 if ( (height > 0) && (width > 0) ) {
793 if ( ! current_options.get_panel_status() ) {
794 current_view.set_win_ratio( (GLfloat) width / (GLfloat) height );
796 current_view.set_win_ratio( (GLfloat) width /
797 ((GLfloat) (height)*0.4232) );
801 current_view.set_winWidth( width );
802 current_view.set_winHeight( height );
803 current_view.force_update_fov_math();
805 // Inform gl of our view window size (now handled elsewhere)
806 // xglViewport(0, 0, (GLint)width, (GLint)height);
807 if ( idle_state == 1000 ) {
808 // yes we've finished all our initializations and are running
809 // the main loop, so this will now work without seg faulting
811 current_view.UpdateViewParams();
812 if ( current_options.get_panel_status() ) {
813 fgPanelReInit(0, 0, 1024, 768);
819 // Initialize GLUT and define a main window
820 int fgGlutInit( int *argc, char **argv ) {
821 // GLUT will extract all glut specific options so later on we only
822 // need wory about our own.
823 xglutInit(argc, argv);
825 // Define Display Parameters
826 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
828 FG_LOG( FG_GENERAL, FG_INFO, "Opening a window: " <<
829 current_options.get_xsize() << "x" << current_options.get_ysize() );
831 // Define initial window size
832 xglutInitWindowSize( current_options.get_xsize(),
833 current_options.get_ysize() );
835 // Initialize windows
836 if ( current_options.get_game_mode() == 0 ) {
837 // Open the regular window
838 xglutCreateWindow("Flight Gear");
840 // Open the cool new 'game mode' window
841 string game_mode_params = "width=" + current_options.get_xsize();
842 game_mode_params += "height=" + current_options.get_ysize();
843 game_mode_params += " bpp=16";
844 cout << "game mode params = " << game_mode_params;
845 glutGameModeString( game_mode_params.c_str() );
849 // This seems to be the absolute earliest in the init sequence
850 // that these calls will return valid info. Too bad it's after
851 // we've already created and sized out window. :-(
852 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
853 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
854 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
856 FG_LOG ( FG_GENERAL, FG_INFO, general.get_glRenderer() );
859 // try to determine if we should adjust the initial default
860 // display resolution. The options class defaults (is
861 // initialized) to 640x480.
862 string renderer = general.glRenderer;
864 // currently we only know how to deal with Mesa/Glide/Voodoo cards
865 if ( renderer.find( "Glide" ) != string::npos ) {
866 FG_LOG( FG_GENERAL, FG_INFO, "Detected a Glide driver" );
867 if ( renderer.find( "FB/8" ) != string::npos ) {
868 // probably a voodoo-2
869 if ( renderer.find( "TMU/SLI" ) != string::npos ) {
870 // probably two SLI'd Voodoo-2's
871 current_options.set_xsize( 1024 );
872 current_options.set_ysize( 768 );
873 FG_LOG( FG_GENERAL, FG_INFO,
874 "It looks like you have two sli'd voodoo-2's." << endl
875 << "upgrading your win resolution to 1024 x 768" );
876 glutReshapeWindow(1024, 768);
878 // probably a single non-SLI'd Voodoo-2
879 current_options.set_xsize( 800 );
880 current_options.set_ysize( 600 );
881 FG_LOG( FG_GENERAL, FG_INFO,
882 "It looks like you have a voodoo-2." << endl
883 << "upgrading your win resolution to 800 x 600" );
884 glutReshapeWindow(800, 600);
886 } else if ( renderer.find( "FB/2" ) != string::npos ) {
887 // probably a voodoo-1, stick with the default
890 // we have no special knowledge of this card, stick with the default
898 // Initialize GLUT event handlers
899 int fgGlutInitEvents( void ) {
900 // call fgReshape() on window resizes
901 xglutReshapeFunc( fgReshape );
903 // call GLUTkey() on keyboard event
904 xglutKeyboardFunc( GLUTkey );
905 glutSpecialFunc( GLUTspecialkey );
907 // call guiMouseFunc() whenever our little rodent is used
908 glutMouseFunc ( guiMouseFunc );
909 glutMotionFunc (guiMotionFunc );
910 glutPassiveMotionFunc (guiMotionFunc );
912 // call fgMainLoop() whenever there is
913 // nothing else to do
914 xglutIdleFunc( fgIdleFunction );
917 xglutDisplayFunc( fgRenderFrame );
924 int main( int argc, char **argv ) {
927 f = current_aircraft.fdm_state;
930 _control87(MCW_EM, MCW_EM); /* defined in float.h */
933 // Initialize the [old] debugging output system
936 // set default log levels
937 fglog().setLogLevels( FG_ALL, FG_INFO );
939 FG_LOG( FG_GENERAL, FG_INFO, "Flight Gear: Version " << VERSION << endl );
943 FG_LOG( FG_GENERAL, FG_INFO, "General Initialization" );
944 FG_LOG( FG_GENERAL, FG_INFO, "======= ==============" );
946 // Attempt to locate and parse a config file
947 // First check fg_root
948 string config = current_options.get_fg_root() + "/system.fgfsrc";
949 current_options.parse_config_file( config );
951 // Next check home directory
952 char* envp = ::getenv( "HOME" );
953 if ( envp != NULL ) {
955 config += "/.fgfsrc";
956 current_options.parse_config_file( config );
959 // Parse remaining command line options
960 // These will override anything specified in a config file
961 if ( current_options.parse_command_line(argc, argv) !=
962 fgOPTIONS::FG_OPTIONS_OK )
964 // Something must have gone horribly wrong with the command
965 // line parsing or maybe the user just requested help ... :-)
966 current_options.usage();
967 // FG_LOG( FG_GENERAL, FG_ALERT, "\nExiting ...");
968 cout << endl << "Exiting ..." << endl;
972 // Initialize the Window/Graphics environment.
973 if( !fgGlutInit(&argc, argv) ) {
974 FG_LOG( FG_GENERAL, FG_ALERT, "GLUT initialization failed ..." );
978 // Initialize the various GLUT Event Handlers.
979 if( !fgGlutInitEvents() ) {
980 FG_LOG( FG_GENERAL, FG_ALERT,
981 "GLUT event handler initialization failed ..." );
985 // First do some quick general initializations
986 if( !fgInitGeneral()) {
987 FG_LOG( FG_GENERAL, FG_ALERT,
988 "General initializations failed ..." );
992 // Init the user interface (we need to do this before passing off
996 // pass control off to the master GLUT event handler
999 // we never actually get here ... but just in case ... :-)
1005 // Revision 1.81 1999/01/19 20:57:03 curt
1006 // MacOS portability changes contributed by "Robert Puyol" <puyol@abvent.fr>
1008 // Revision 1.80 1999/01/09 13:37:40 curt
1009 // Convert fgTIMESTAMP to FGTimeStamp which holds usec instead of ms.
1011 // Revision 1.79 1999/01/08 03:23:56 curt
1012 // Beginning work on compensating for sim time vs. real world time "jitter".
1014 // Revision 1.78 1999/01/07 20:25:08 curt
1015 // Updated struct fgGENERAL to class FGGeneral.
1017 // Revision 1.77 1998/12/18 23:40:55 curt
1018 // New frame rate counting mechanism.
1020 // Revision 1.76 1998/12/11 20:26:26 curt
1021 // Fixed view frustum culling accuracy bug so we can look out the sides and
1022 // back without tri-stripes dropping out.
1024 // Revision 1.75 1998/12/09 18:50:23 curt
1025 // Converted "class fgVIEW" to "class FGView" and updated to make data
1026 // members private and make required accessor functions.
1028 // Revision 1.74 1998/12/06 14:52:54 curt
1029 // Fixed a problem with the initial starting altitude. "v->abs_view_pos" wasn't
1030 // being calculated correctly at the beginning causing the first terrain
1031 // intersection to fail, returning a ground altitude of zero, causing the plane
1032 // to free fall for one frame, until the ground altitude was corrected, but now
1033 // being under the ground we got a big bounce and the plane always ended up
1036 // Revision 1.73 1998/12/06 13:51:22 curt
1037 // Turned "struct fgWEATHER" into "class FGWeather".
1039 // Revision 1.72 1998/12/05 15:54:18 curt
1040 // Renamed class fgFLIGHT to class FGState as per request by JSB.
1042 // Revision 1.71 1998/12/05 14:19:51 curt
1043 // Looking into a problem with cur_view_params.abs_view_pos initialization.
1045 // Revision 1.70 1998/12/03 01:17:14 curt
1046 // Converted fgFLIGHT to a class.
1048 // Revision 1.69 1998/11/23 20:51:26 curt
1049 // Fiddling with when I can get info from the opengl driver.
1051 // Revision 1.68 1998/11/20 01:02:35 curt
1052 // Try to detect Mesa/Glide/Voodoo and chose the appropriate resolution.
1054 // Revision 1.67 1998/11/16 13:59:58 curt
1055 // Added pow() macro bug work around.
1056 // Added support for starting FGFS at various resolutions.
1057 // Added some initial serial port support.
1058 // Specify default log levels in main().
1060 // Revision 1.66 1998/11/11 00:24:00 curt
1061 // Added Michael Johnson's audio patches for testing.
1062 // Also did a few tweaks to avoid numerical problems when starting at a place
1063 // with no (or bogus) scenery.
1065 // Revision 1.65 1998/11/09 23:39:22 curt
1066 // Tweaks for the instrument panel.
1068 // Revision 1.64 1998/11/07 19:07:09 curt
1069 // Enable release builds using the --without-logging option to the configure
1070 // script. Also a couple log message cleanups, plus some C to C++ comment
1073 // Revision 1.63 1998/11/06 21:18:08 curt
1074 // Converted to new logstream debugging facility. This allows release
1075 // builds with no messages at all (and no performance impact) by using
1076 // the -DFG_NDEBUG flag.
1078 // Revision 1.62 1998/10/27 02:14:35 curt
1079 // Changes to support GLUT joystick routines as fall back.
1081 // Revision 1.61 1998/10/25 14:08:47 curt
1082 // Turned "struct fgCONTROLS" into a class, with inlined accessor functions.
1084 // Revision 1.60 1998/10/25 10:57:18 curt
1085 // Changes to use the new joystick library if it is available.
1087 // Revision 1.59 1998/10/17 01:34:21 curt
1090 // Revision 1.58 1998/10/16 23:27:52 curt
1093 // Revision 1.57 1998/10/16 00:54:00 curt
1094 // Converted to Point3D class.
1096 // Revision 1.56 1998/10/02 12:46:47 curt
1097 // Added an "auto throttle"
1099 // Revision 1.55 1998/09/29 14:58:18 curt
1100 // Use working() instead of !not_working() for audio.
1102 // Revision 1.54 1998/09/29 02:03:38 curt
1105 // Revision 1.53 1998/09/26 13:18:35 curt
1106 // Check if audio "working()" before doing audio manipulations.
1108 // Revision 1.52 1998/09/25 16:02:07 curt
1109 // Added support for pitch and volume envelopes and tied them to the
1110 // throttle setting.
1112 // Revision 1.51 1998/09/15 04:27:28 curt
1113 // Changes for new Astro code.
1115 // Revision 1.50 1998/09/15 02:09:24 curt
1116 // Include/fg_callback.hxx
1117 // Moved code inline to stop g++ 2.7 from complaining.
1119 // Simulator/Time/event.[ch]xx
1120 // Changed return type of fgEVENT::printStat(). void caused g++ 2.7 to
1121 // complain bitterly.
1123 // Minor bugfix and changes.
1125 // Simulator/Main/GLUTmain.cxx
1126 // Added missing type to idle_state definition - eliminates a warning.
1128 // Simulator/Main/fg_init.cxx
1129 // Changes to airport lookup.
1131 // Simulator/Main/options.cxx
1132 // Uses fg_gzifstream when loading config file.
1134 // Revision 1.49 1998/09/09 16:25:39 curt
1135 // Only use GLUT_STENCIL if the instument panel has been requested.
1137 // Revision 1.48 1998/08/28 18:15:03 curt
1138 // Added new cockpit code from Friedemann Reinhard
1139 // <mpt218@faupt212.physik.uni-erlangen.de>
1141 // Revision 1.47 1998/08/27 17:02:04 curt
1142 // Contributions from Bernie Bright <bbright@c031.aone.net.au>
1143 // - use strings for fg_root and airport_id and added methods to return
1145 // - inlined all access methods,
1146 // - made the parsing functions private methods,
1147 // - deleted some unused functions.
1148 // - propogated some of these changes out a bit further.
1150 // Revision 1.46 1998/08/22 14:49:56 curt
1151 // Attempting to iron out seg faults and crashes.
1152 // Did some shuffling to fix a initialization order problem between view
1153 // position, scenery elevation.
1155 // Revision 1.45 1998/08/20 20:32:31 curt
1156 // Reshuffled some of the code in and around views.[ch]xx
1158 // Revision 1.44 1998/08/20 15:10:33 curt
1159 // Added GameGLUT support.
1161 // Revision 1.43 1998/08/12 21:01:47 curt
1162 // Master volume from 30% -> 80%
1164 // Revision 1.42 1998/07/30 23:48:25 curt
1165 // Output position & orientation when pausing.
1166 // Eliminated libtool use.
1167 // Added options to specify initial position and orientation.
1168 // Changed default fov to 55 degrees.
1169 // Added command line option to start in paused or unpaused state.
1171 // Revision 1.41 1998/07/27 18:41:24 curt
1172 // Added a pause command "p"
1173 // Fixed some initialization order problems between pui and glut.
1174 // Added an --enable/disable-sound option.
1176 // Revision 1.40 1998/07/24 21:56:59 curt
1177 // 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.
1179 // Revision 1.39 1998/07/24 21:39:08 curt
1180 // Debugging output tweaks.
1181 // Cast glGetString to (char *) to avoid compiler errors.
1182 // Optimizations to fgGluLookAt() by Norman Vine.
1184 // Revision 1.38 1998/07/22 21:40:43 curt
1185 // Clear to adjusted fog color (for sunrise/sunset effects)
1186 // Make call to fog sunrise/sunset adjustment method.
1187 // Add a stdc++ library bug work around to fg_init.cxx
1189 // Revision 1.37 1998/07/20 12:49:44 curt
1190 // Tweaked color buffer clearing defaults. We clear the color buffer if we
1191 // are doing textures. Assumptions: If we are doing textures we have hardware
1192 // support that can clear the color buffer for "free." If we are doing software
1193 // rendering with textures, then the extra clear time gets lost in the noise.
1195 // Revision 1.36 1998/07/16 17:33:35 curt
1196 // "H" / "h" now control hud brightness as well with off being one of the
1198 // Better checking for xmesa/fx 3dfx fullscreen/window support for deciding
1199 // whether or not to build in the feature.
1200 // Translucent menu support.
1201 // HAVE_AUDIO_SUPPORT -> ENABLE_AUDIO_SUPPORT
1202 // Use fork() / wait() for playing mp3 init music in background under unix.
1203 // Changed default tile diameter to 5.
1205 // Revision 1.35 1998/07/13 21:01:36 curt
1206 // Wrote access functions for current fgOPTIONS.
1208 // Revision 1.34 1998/07/13 15:32:37 curt
1209 // Clear color buffer if drawing wireframe.
1210 // When specifying and airport, start elevation at -1000 and let the system
1211 // position you at ground level.
1213 // Revision 1.33 1998/07/12 03:14:42 curt
1214 // Added ground collision detection.
1215 // Did some serious horsing around to be able to "hug" the ground properly
1216 // and still be able to take off.
1217 // Set the near clip plane to 1.0 meters when less than 10 meters above the
1219 // Did some serious horsing around getting the initial airplane position to be
1220 // correct based on rendered terrain elevation.
1221 // Added a little cheat/hack that will prevent the view position from ever
1222 // dropping below the terrain, even when the flight model doesn't quite
1223 // put you as high as you'd like.
1225 // Revision 1.32 1998/07/08 14:45:07 curt
1226 // polar3d.h renamed to polar3d.hxx
1227 // vector.h renamed to vector.hxx
1228 // updated audio support so it waits to create audio classes (and tie up
1229 // /dev/dsp) until the mpg123 player is finished.
1231 // Revision 1.31 1998/07/06 21:34:17 curt
1232 // Added an enable/disable splash screen option.
1233 // Added an enable/disable intro music option.
1234 // Added an enable/disable instrument panel option.
1235 // Added an enable/disable mouse pointer option.
1236 // Added using namespace std for compilers that support this.
1238 // Revision 1.30 1998/07/06 02:42:03 curt
1239 // Added support for switching between fullscreen and window mode for
1242 // Added a basic splash screen. Restructured the main loop and top level
1243 // initialization routines to do this.
1245 // Hacked in some support for playing a startup mp3 sound file while rest
1246 // of sim initializes. Currently only works in Unix using the mpg123 player.
1247 // Waits for the mpg123 player to finish before initializing internal
1250 // Revision 1.29 1998/07/04 00:52:22 curt
1251 // Add my own version of gluLookAt() (which is nearly identical to the
1252 // Mesa/glu version.) But, by calculating the Model View matrix our selves
1253 // we can save this matrix without having to read it back in from the video
1254 // card. This hopefully allows us to save a few cpu cycles when rendering
1255 // out the fragments because we can just use glLoadMatrixd() with the
1256 // precalculated matrix for each tile rather than doing a push(), translate(),
1257 // pop() for every fragment.
1259 // Panel status defaults to off for now until it gets a bit more developed.
1261 // Extract OpenGL driver info on initialization.
1263 // Revision 1.28 1998/06/27 16:54:32 curt
1264 // Replaced "extern displayInstruments" with a entry in fgOPTIONS.
1265 // Don't change the view port when displaying the panel.
1267 // Revision 1.27 1998/06/17 21:35:10 curt
1268 // Refined conditional audio support compilation.
1269 // Moved texture parameter setup calls to ../Scenery/materials.cxx
1270 // #include <string.h> before various STL includes.
1271 // Make HUD default state be enabled.
1273 // Revision 1.26 1998/06/13 00:40:32 curt
1274 // Tweaked fog command line options.
1276 // Revision 1.25 1998/06/12 14:27:26 curt
1277 // Pui -> PUI, Gui -> GUI.
1279 // Revision 1.24 1998/06/12 00:57:39 curt
1280 // Added support for Pui/Gui.
1281 // Converted fog to GL_FOG_EXP2.
1282 // Link to static simulator parts.
1283 // Update runfg.bat to try to be a little smarter.
1285 // Revision 1.23 1998/06/08 17:57:04 curt
1286 // Minor sound/startup position tweaks.
1288 // Revision 1.22 1998/06/05 18:18:40 curt
1289 // A bit of fiddling with audio ...
1291 // Revision 1.21 1998/06/03 22:01:06 curt
1292 // Tweaking sound library usage.
1294 // Revision 1.20 1998/06/03 00:47:11 curt
1295 // Updated to compile in audio support if OSS available.
1296 // Updated for new version of Steve's audio library.
1297 // STL includes don't use .h
1298 // Small view optimizations.
1300 // Revision 1.19 1998/06/01 17:54:40 curt
1301 // Added Linux audio support.
1302 // avoid glClear( COLOR_BUFFER_BIT ) when not using it to set the sky color.
1305 // Revision 1.18 1998/05/29 20:37:19 curt
1306 // Tweaked material properties & lighting a bit in GLUTmain.cxx.
1307 // Read airport list into a "map" STL for dynamic list sizing and fast tree
1310 // Revision 1.17 1998/05/22 21:28:52 curt
1311 // Modifications to use the new fgEVENT_MGR class.
1313 // Revision 1.16 1998/05/20 20:51:33 curt
1314 // Tweaked smooth shaded texture lighting properties.
1315 // Converted fgLIGHT to a C++ class.
1317 // Revision 1.15 1998/05/16 13:08:34 curt
1318 // C++ - ified views.[ch]xx
1319 // Shuffled some additional view parameters into the fgVIEW class.
1320 // Changed tile-radius to tile-diameter because it is a much better
1322 // Added a WORLD_TO_EYE transformation to views.cxx. This allows us
1323 // to transform world space to eye space for view frustum culling.
1325 // Revision 1.14 1998/05/13 18:29:57 curt
1326 // Added a keyboard binding to dynamically adjust field of view.
1327 // Added a command line option to specify fov.
1328 // Adjusted terrain color.
1329 // Root path info moved to fgOPTIONS.
1330 // Added ability to parse options out of a config file.
1332 // Revision 1.13 1998/05/11 18:18:15 curt
1333 // For flat shading use "glHint (GL_FOG_HINT, GL_FASTEST )"
1335 // Revision 1.12 1998/05/07 23:14:15 curt
1336 // Added "D" key binding to set autopilot heading.
1337 // Made frame rate calculation average out over last 10 frames.
1338 // Borland C++ floating point exception workaround.
1339 // Added a --tile-radius=n option.
1341 // Revision 1.11 1998/05/06 03:16:23 curt
1342 // Added an averaged global frame rate counter.
1343 // Added an option to control tile radius.
1345 // Revision 1.10 1998/05/03 00:47:31 curt
1346 // Added an option to enable/disable full-screen mode.
1348 // Revision 1.9 1998/04/30 12:34:17 curt
1349 // Added command line rendering options:
1350 // enable/disable fog/haze
1351 // specify smooth/flat shading
1352 // disable sky blending and just use a solid color
1353 // enable wireframe drawing mode
1355 // Revision 1.8 1998/04/28 01:20:21 curt
1356 // Type-ified fgTIME and fgVIEW.
1357 // Added a command line option to disable textures.
1359 // Revision 1.7 1998/04/26 05:10:02 curt
1360 // "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
1362 // Revision 1.6 1998/04/25 22:06:30 curt
1363 // Edited cvs log messages in source files ... bad bad bad!
1365 // Revision 1.5 1998/04/25 20:24:01 curt
1366 // Cleaned up initialization sequence to eliminate interdependencies
1367 // between sun position, lighting, and view position. This creates a
1368 // valid single pass initialization path.
1370 // Revision 1.4 1998/04/24 14:19:30 curt
1373 // Revision 1.3 1998/04/24 00:49:18 curt
1374 // Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
1375 // Trying out some different option parsing code.
1376 // Some code reorganization.
1378 // Revision 1.2 1998/04/22 13:25:41 curt
1379 // C++ - ifing the code.
1380 // Starting a bit of reorganization of lighting code.
1382 // Revision 1.1 1998/04/21 17:02:39 curt
1383 // Prepairing for C++ integration.
1385 // Revision 1.71 1998/04/18 04:11:26 curt
1386 // Moved fg_debug to it's own library, added zlib support.
1388 // Revision 1.70 1998/04/14 02:21:02 curt
1389 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
1390 // <jgoeke@voyager.net>
1392 // Revision 1.69 1998/04/08 23:35:34 curt
1393 // Tweaks to Gnu automake/autoconf system.
1395 // Revision 1.68 1998/04/03 22:09:03 curt
1396 // Converting to Gnu autoconf system.
1398 // Revision 1.67 1998/03/23 21:24:37 curt
1399 // Source code formating tweaks.
1401 // Revision 1.66 1998/03/14 00:31:20 curt
1402 // Beginning initial terrain texturing experiments.
1404 // Revision 1.65 1998/03/09 22:45:57 curt
1405 // Minor tweaks for building on sparc platform.
1407 // Revision 1.64 1998/02/20 00:16:23 curt
1408 // Thursday's tweaks.
1410 // Revision 1.63 1998/02/16 16:17:39 curt
1413 // Revision 1.62 1998/02/16 13:39:42 curt
1414 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
1415 // tiles to occasionally be missing.
1417 // Revision 1.61 1998/02/12 21:59:46 curt
1418 // Incorporated code changes contributed by Charlie Hotchkiss
1419 // <chotchkiss@namg.us.anritsu.com>
1421 // Revision 1.60 1998/02/11 02:50:40 curt
1424 // Revision 1.59 1998/02/09 22:56:54 curt
1425 // Removed "depend" files from cvs control. Other minor make tweaks.
1427 // Revision 1.58 1998/02/09 15:07:49 curt
1430 // Revision 1.57 1998/02/07 15:29:40 curt
1431 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
1432 // <chotchkiss@namg.us.anritsu.com>
1434 // Revision 1.56 1998/02/03 23:20:23 curt
1435 // Lots of little tweaks to fix various consistency problems discovered by
1436 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
1437 // passed arguments along to the real printf(). Also incorporated HUD changes
1438 // by Michele America.
1440 // Revision 1.55 1998/02/02 20:53:58 curt
1441 // Incorporated Durk's changes.
1443 // Revision 1.54 1998/01/31 00:43:10 curt
1444 // Added MetroWorks patches from Carmen Volpe.
1446 // Revision 1.53 1998/01/27 18:35:54 curt
1449 // Revision 1.52 1998/01/27 00:47:56 curt
1450 // Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
1451 // system and commandline/config file processing code.
1453 // Revision 1.51 1998/01/26 15:57:05 curt
1454 // Tweaks for dynamic scenery development.
1456 // Revision 1.50 1998/01/19 19:27:07 curt
1457 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
1458 // This should simplify things tremendously.
1460 // Revision 1.49 1998/01/19 18:40:31 curt
1461 // Tons of little changes to clean up the code and to remove fatal errors
1462 // when building with the c++ compiler.
1464 // Revision 1.48 1998/01/19 18:35:46 curt
1465 // Minor tweaks and fixes for cygwin32.
1467 // Revision 1.47 1998/01/13 00:23:08 curt
1468 // Initial changes to support loading and management of scenery tiles. Note,
1469 // there's still a fair amount of work left to be done.
1471 // Revision 1.46 1998/01/08 02:22:06 curt
1472 // Beginning to integrate Tile management subsystem.
1474 // Revision 1.45 1998/01/07 03:18:55 curt
1475 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
1477 // Revision 1.44 1997/12/30 22:22:31 curt
1478 // Further integration of event manager.
1480 // Revision 1.43 1997/12/30 20:47:43 curt
1481 // Integrated new event manager with subsystem initializations.
1483 // Revision 1.42 1997/12/30 16:36:47 curt
1484 // Merged in Durk's changes ...
1486 // Revision 1.41 1997/12/30 13:06:56 curt
1487 // A couple lighting tweaks ...
1489 // Revision 1.40 1997/12/30 01:38:37 curt
1490 // Switched back to per vertex normals and smooth shading for terrain.
1492 // Revision 1.39 1997/12/22 23:45:45 curt
1493 // First stab at sunset/sunrise sky glow effects.
1495 // Revision 1.38 1997/12/22 04:14:28 curt
1496 // Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
1498 // Revision 1.37 1997/12/19 23:34:03 curt
1499 // Lot's of tweaking with sky rendering and lighting.
1501 // Revision 1.36 1997/12/19 16:44:57 curt
1502 // Working on scene rendering order and options.
1504 // Revision 1.35 1997/12/18 23:32:32 curt
1505 // First stab at sky dome actually starting to look reasonable. :-)
1507 // Revision 1.34 1997/12/17 23:13:34 curt
1508 // Began working on rendering a sky.
1510 // Revision 1.33 1997/12/15 23:54:45 curt
1511 // Add xgl wrappers for debugging.
1512 // Generate terrain normals on the fly.
1514 // Revision 1.32 1997/12/15 20:59:08 curt
1517 // Revision 1.31 1997/12/12 21:41:25 curt
1518 // More light/material property tweaking ... still a ways off.
1520 // Revision 1.30 1997/12/12 19:52:47 curt
1521 // Working on lightling and material properties.
1523 // Revision 1.29 1997/12/11 04:43:54 curt
1524 // Fixed sun vector and lighting problems. I thing the moon is now lit
1527 // Revision 1.28 1997/12/10 22:37:45 curt
1528 // Prepended "fg" on the name of all global structures that didn't have it yet.
1529 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
1531 // Revision 1.27 1997/12/09 05:11:54 curt
1532 // Working on tweaking lighting.
1534 // Revision 1.26 1997/12/09 04:25:29 curt
1535 // Working on adding a global lighting params structure.
1537 // Revision 1.25 1997/12/08 22:54:09 curt
1538 // Enabled GL_CULL_FACE.
1540 // Revision 1.24 1997/11/25 19:25:32 curt
1541 // Changes to integrate Durk's moon/sun code updates + clean up.
1543 // Revision 1.23 1997/11/15 18:16:34 curt
1546 // Revision 1.22 1997/10/30 12:38:41 curt
1547 // Working on new scenery subsystem.
1549 // Revision 1.21 1997/09/23 00:29:38 curt
1550 // Tweaks to get things to compile with gcc-win32.
1552 // Revision 1.20 1997/09/22 14:44:19 curt
1553 // Continuing to try to align stars correctly.
1555 // Revision 1.19 1997/09/18 16:20:08 curt
1556 // At dusk/dawn add/remove stars in stages.
1558 // Revision 1.18 1997/09/16 22:14:51 curt
1559 // Tweaked time of day lighting equations. Don't draw stars during the day.
1561 // Revision 1.17 1997/09/16 15:50:29 curt
1562 // Working on star alignment and time issues.
1564 // Revision 1.16 1997/09/13 02:00:06 curt
1565 // Mostly working on stars and generating sidereal time for accurate star
1568 // Revision 1.15 1997/09/05 14:17:27 curt
1569 // More tweaking with stars.
1571 // Revision 1.14 1997/09/05 01:35:53 curt
1572 // Working on getting stars right.
1574 // Revision 1.13 1997/09/04 02:17:34 curt
1577 // Revision 1.12 1997/08/27 21:32:24 curt
1578 // Restructured view calculation code. Added stars.
1580 // Revision 1.11 1997/08/27 03:30:16 curt
1581 // Changed naming scheme of basic shared structures.
1583 // Revision 1.10 1997/08/25 20:27:22 curt
1584 // Merged in initial HUD and Joystick code.
1586 // Revision 1.9 1997/08/22 21:34:39 curt
1587 // Doing a bit of reorganizing and house cleaning.
1589 // Revision 1.8 1997/08/19 23:55:03 curt
1590 // Worked on better simulating real lighting.
1592 // Revision 1.7 1997/08/16 12:22:38 curt
1593 // Working on improving the lighting/shading.
1595 // Revision 1.6 1997/08/13 20:24:56 curt
1596 // Changes due to changing sunpos interface.
1598 // Revision 1.5 1997/08/06 21:08:32 curt
1599 // Sun position now really* works (I think) ... I still have sun time warping
1600 // code in place, probably should remove it soon.
1602 // Revision 1.4 1997/08/06 15:41:26 curt
1603 // Working on correct sun position.
1605 // Revision 1.3 1997/08/06 00:24:22 curt
1606 // Working on correct real time sun lighting.
1608 // Revision 1.2 1997/08/04 20:25:15 curt
1609 // Organizational tweaking.
1611 // Revision 1.1 1997/08/02 18:45:00 curt
1612 // Renamed GLmain.c GLUTmain.c
1614 // Revision 1.43 1997/08/02 16:23:47 curt
1617 // Revision 1.42 1997/08/01 19:43:33 curt
1618 // Making progress with coordinate system overhaul.
1620 // Revision 1.41 1997/07/31 22:52:37 curt
1621 // Working on redoing internal coordinate systems & scenery transformations.
1623 // Revision 1.40 1997/07/30 16:12:42 curt
1624 // Moved fg_random routines from Util/ to Math/
1626 // Revision 1.39 1997/07/21 14:45:01 curt
1629 // Revision 1.38 1997/07/19 23:04:47 curt
1630 // Added an initial weather section.
1632 // Revision 1.37 1997/07/19 22:34:02 curt
1633 // Moved PI definitions to ../constants.h
1634 // Moved random() stuff to ../Utils/ and renamed fg_random()
1636 // Revision 1.36 1997/07/18 23:41:25 curt
1637 // Tweaks for building with Cygnus Win32 compiler.
1639 // Revision 1.35 1997/07/18 14:28:34 curt
1640 // Hacked in some support for wind/turbulence.
1642 // Revision 1.34 1997/07/16 20:04:48 curt
1643 // Minor tweaks to aid Win32 port.
1645 // Revision 1.33 1997/07/12 03:50:20 curt
1646 // Added an #include <Windows32/Base.h> to help compiling for Win32
1648 // Revision 1.32 1997/07/11 03:23:18 curt
1649 // Solved some scenery display/orientation problems. Still have a positioning
1650 // (or transformation?) problem.
1652 // Revision 1.31 1997/07/11 01:29:58 curt
1653 // More tweaking of terrian floor.
1655 // Revision 1.30 1997/07/10 04:26:37 curt
1656 // We now can interpolated ground elevation for any position in the grid. We
1657 // can use this to enforce a "hard" ground. We still need to enforce some
1658 // bounds checking so that we don't try to lookup data points outside the
1661 // Revision 1.29 1997/07/09 21:31:12 curt
1662 // Working on making the ground "hard."
1664 // Revision 1.28 1997/07/08 18:20:12 curt
1665 // Working on establishing a hard ground.
1667 // Revision 1.27 1997/07/07 20:59:49 curt
1668 // Working on scenery transformations to enable us to fly fluidly over the
1669 // poles with no discontinuity/distortion in scenery.
1671 // Revision 1.26 1997/07/05 20:43:34 curt
1672 // renamed mat3 directory to Math so we could add other math related routines.
1674 // Revision 1.25 1997/06/29 21:19:17 curt
1675 // Working on scenery management system.
1677 // Revision 1.24 1997/06/26 22:14:53 curt
1678 // Beginning work on a scenery management system.
1680 // Revision 1.23 1997/06/26 19:08:33 curt
1681 // Restructuring make, adding automatic "make dep" support.
1683 // Revision 1.22 1997/06/25 15:39:47 curt
1684 // Minor changes to compile with rsxnt/win32.
1686 // Revision 1.21 1997/06/22 21:44:41 curt
1687 // Working on intergrating the VRML (subset) parser.
1689 // Revision 1.20 1997/06/21 17:12:53 curt
1690 // Capitalized subdirectory names.
1692 // Revision 1.19 1997/06/18 04:10:31 curt
1693 // A couple more runway tweaks ...
1695 // Revision 1.18 1997/06/18 02:21:24 curt
1696 // Hacked in a runway
1698 // Revision 1.17 1997/06/17 16:51:58 curt
1699 // Timer interval stuff now uses gettimeofday() instead of ftime()
1701 // Revision 1.16 1997/06/17 04:19:16 curt
1702 // More timer related tweaks with respect to view direction changes.
1704 // Revision 1.15 1997/06/17 03:41:10 curt
1705 // Nonsignal based interval timing is now working.
1706 // This would be a good time to look at cleaning up the code structure a bit.
1708 // Revision 1.14 1997/06/16 19:32:51 curt
1709 // Starting to add general timer support.
1711 // Revision 1.13 1997/06/02 03:40:06 curt
1712 // A tiny bit more view tweaking.
1714 // Revision 1.12 1997/06/02 03:01:38 curt
1715 // Working on views (side, front, back, transitions, etc.)
1717 // Revision 1.11 1997/05/31 19:16:25 curt
1718 // Elevator trim added.
1720 // Revision 1.10 1997/05/31 04:13:52 curt
1721 // WE CAN NOW FLY!!!
1723 // Continuing work on the LaRCsim flight model integration.
1724 // Added some MSFS-like keyboard input handling.
1726 // Revision 1.9 1997/05/30 19:27:01 curt
1727 // The LaRCsim flight model is starting to look like it is working.
1729 // Revision 1.8 1997/05/30 03:54:10 curt
1730 // Made a bit more progress towards integrating the LaRCsim flight model.
1732 // Revision 1.7 1997/05/29 22:39:49 curt
1733 // Working on incorporating the LaRCsim flight model.
1735 // Revision 1.6 1997/05/29 12:31:39 curt
1736 // Minor tweaks, moving towards general flight model integration.
1738 // Revision 1.5 1997/05/29 02:33:23 curt
1739 // Updated to reflect changing interfaces in other "modules."
1741 // Revision 1.4 1997/05/27 17:44:31 curt
1742 // Renamed & rearranged variables and routines. Added some initial simple
1743 // timer/alarm routines so the flight model can be updated on a regular
1746 // Revision 1.3 1997/05/23 15:40:25 curt
1747 // Added GNU copyright headers.
1750 // Revision 1.2 1997/05/23 00:35:12 curt
1751 // Trying to get fog to work ...
1753 // Revision 1.1 1997/05/21 15:57:51 curt
1754 // Renamed due to added GLUT support.
1756 // Revision 1.3 1997/05/19 18:22:42 curt
1757 // Parameter tweaking ... starting to stub in fog support.
1759 // Revision 1.2 1997/05/17 00:17:34 curt
1760 // Trying to stub in support for standard OpenGL.
1762 // Revision 1.1 1997/05/16 16:05:52 curt
1763 // Initial revision.