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"
88 #include "fg_serial.hxx"
91 // This is a record containing a bit of global housekeeping information
94 // Specify our current idle function state. This is used to run all
95 // our initializations out of the glutIdleLoop() so that we can get a
96 // splash screen up and running right away.
97 static int idle_state = 0;
102 // Yet another hack, this time for the panel
105 // Global structures for the Audio library
106 #ifdef ENABLE_AUDIO_SUPPORT
107 slEnvelope pitch_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
108 slEnvelope volume_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
109 slScheduler *audio_sched;
110 smMixer *audio_mixer;
116 // The following defines flight gear options. Because glutlib will also
117 // want to parse its own options, those options must not be included here
118 // or they will get parsed by the main program option parser. Hence case
119 // is significant for any option added that might be in conflict with
122 // glutlib parses for:
124 // -direct (invalid in Win32)
128 // -indirect (invalid in Win32)
131 // Note that glutlib depends upon strings while this program's
132 // option parser wants only initial characters followed by numbers
137 // fgInitVisuals() -- Initialize various GL/view parameters
138 static void fgInitVisuals( void ) {
141 l = &cur_light_params;
143 // Go full screen if requested ...
144 if ( current_options.get_fullscreen() ) {
148 // If enabled, normal vectors specified with glNormal are scaled
149 // to unit length after transformation. See glNormal.
150 // xglEnable( GL_NORMALIZE );
152 xglEnable( GL_LIGHTING );
153 xglEnable( GL_LIGHT0 );
154 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
156 // xglFogi (GL_FOG_MODE, GL_LINEAR);
157 xglFogi (GL_FOG_MODE, GL_EXP2);
158 // Fog density is now set when the weather system is initialized
159 // xglFogf (GL_FOG_DENSITY, w->fog_density);
160 if ( (current_options.get_fog() == 1) ||
161 (current_options.get_shading() == 0) ) {
162 // if fastest fog requested, or if flat shading force fastest
163 xglHint ( GL_FOG_HINT, GL_FASTEST );
164 } else if ( current_options.get_fog() == 2 ) {
165 xglHint ( GL_FOG_HINT, GL_NICEST );
167 if ( current_options.get_wireframe() ) {
169 xglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
172 // This is the default anyways, but it can't hurt
173 xglFrontFace ( GL_CCW );
176 // xglEnable(GL_POINT_SMOOTH);
177 // xglEnable(GL_LINE_SMOOTH);
178 // xglEnable(GL_POLYGON_SMOOTH);
183 // Draw a basic instrument panel
184 static void fgUpdateInstrViewParams( void ) {
188 fgVIEW *v = ¤t_view;
190 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) / 2);
192 xglMatrixMode(GL_PROJECTION);
196 gluOrtho2D(0, 640, 0, 480);
197 xglMatrixMode(GL_MODELVIEW);
201 xglColor3f(1.0, 1.0, 1.0);
204 xglDisable(GL_DEPTH_TEST);
205 xglDisable(GL_LIGHTING);
208 xglColor3f (0.5, 0.5, 0.5);
211 xglVertex2f(0.0, 0.00);
212 xglVertex2f(0.0, 480.0);
213 xglVertex2f(640.0,480.0);
214 xglVertex2f(640.0, 0.0);
217 xglRectf(0.0,0.0, 640, 480);
218 xglEnable(GL_DEPTH_TEST);
219 xglEnable(GL_LIGHTING);
220 xglMatrixMode(GL_PROJECTION);
222 xglMatrixMode(GL_MODELVIEW);
228 // Update all Visuals (redraws anything graphics related)
229 static void fgRenderFrame( void ) {
230 fgLIGHT *l = &cur_light_params;
231 fgTIME *t = &cur_time_params;
232 FGView *v = ¤t_view;
235 static int iteration = 0;
236 // GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
237 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
238 GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
239 GLbitfield clear_mask;
241 if ( idle_state != 1000 ) {
242 // still initializing, draw the splash screen
243 if ( current_options.get_splash_screen() == 1 ) {
247 // idle_state is now 1000 meaning we've finished all our
248 // initializations and are running the main loop, so this will
249 // now work without seg faulting the system.
251 // printf("Ground = %.2f Altitude = %.2f\n", scenery.cur_elev,
252 // FG_Altitude * FEET_TO_METER);
254 // this is just a temporary hack, to make me understand Pui
255 // timerText -> setLabel (ctime (&t->cur_time));
258 // update view volume parameters
259 v->UpdateViewParams();
261 // set the sun position
262 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
264 clear_mask = GL_DEPTH_BUFFER_BIT;
265 if ( current_options.get_wireframe() ) {
266 clear_mask |= GL_COLOR_BUFFER_BIT;
268 if ( current_options.get_panel_status() ) {
269 // we can't clear the screen when the panel is active
270 } else if ( current_options.get_skyblend() ) {
271 if ( current_options.get_textures() ) {
272 // glClearColor(black[0], black[1], black[2], black[3]);
273 glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
274 l->adj_fog_color[2], l->adj_fog_color[3]);
275 clear_mask |= GL_COLOR_BUFFER_BIT;
278 glClearColor(l->sky_color[0], l->sky_color[1],
279 l->sky_color[2], l->sky_color[3]);
280 clear_mask |= GL_COLOR_BUFFER_BIT;
282 xglClear( clear_mask );
284 // Tell GL we are switching to model view parameters
285 xglMatrixMode(GL_MODELVIEW);
286 // xglLoadIdentity();
289 xglDisable( GL_DEPTH_TEST );
290 xglDisable( GL_LIGHTING );
291 xglDisable( GL_CULL_FACE );
292 xglDisable( GL_FOG );
293 xglShadeModel( GL_SMOOTH );
294 if ( current_options.get_skyblend() ) {
298 // setup transformation for drawing astronomical objects
300 // Translate to view position
301 Point3D view_pos = v->get_view_pos();
302 xglTranslatef( view_pos.x(), view_pos.y(), view_pos.z() );
303 // Rotate based on gst (sidereal time)
304 // note: constant should be 15.041085, Curt thought it was 15
305 angle = t->gst * 15.041085;
306 // printf("Rotating astro objects by %.2f degrees\n",angle);
307 xglRotatef( angle, 0.0, 0.0, -1.0 );
309 // draw stars and planets
311 SolarSystem::theSolarSystem->draw();
316 if ( current_options.get_shading() ) {
317 xglShadeModel( GL_SMOOTH );
319 xglShadeModel( GL_FLAT );
321 xglEnable( GL_DEPTH_TEST );
322 if ( current_options.get_fog() > 0 ) {
324 xglFogfv (GL_FOG_COLOR, l->adj_fog_color);
326 // set lighting parameters
327 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
328 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
330 if ( current_options.get_textures() ) {
331 // texture parameters
332 xglEnable( GL_TEXTURE_2D );
333 xglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
334 xglHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
335 // set base color (I don't think this is doing anything here)
336 xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
337 xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
339 xglDisable( GL_TEXTURE_2D );
340 xglMaterialfv (GL_FRONT, GL_AMBIENT, terrain_color);
341 xglMaterialfv (GL_FRONT, GL_DIFFUSE, terrain_color);
342 // xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
343 // xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
348 xglDisable( GL_TEXTURE_2D );
349 xglDisable( GL_FOG );
351 if ( (iteration == 0) && (current_options.get_panel_status()) ) {
352 // Did we run this loop before ?? ...and do we need the panel ??
353 fgPanelReInit(0, 0, 1024, 768);
356 // display HUD && Panel
358 iteration = 1; // don't ReInit the panel in the future
360 // We can do translucent menus, so why not. :-)
361 xglEnable ( GL_BLEND ) ;
362 xglBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
364 xglDisable ( GL_BLEND ) ;
372 // Update internal time dependent calculations (i.e. flight model)
373 void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
374 FGInterface *f = current_aircraft.fdm_state;
375 fgLIGHT *l = &cur_light_params;
376 fgTIME *t = &cur_time_params;
377 FGView *v = ¤t_view;
380 // update the flight model
381 if ( multi_loop < 0 ) {
382 multi_loop = DEFAULT_MULTILOOP;
386 // run Autopilot system
389 // printf("updating flight model x %d\n", multi_loop);
390 fgFDMUpdate( current_options.get_flight_model(),
391 cur_fdm_state, multi_loop, remainder );
393 fgFDMUpdate( current_options.get_flight_model(),
394 cur_fdm_state, 0, remainder );
397 // update the view angle
398 for ( i = 0; i < multi_loop; i++ ) {
399 if ( fabs(v->get_goal_view_offset() - v->get_view_offset()) < 0.05 ) {
400 v->set_view_offset( v->get_goal_view_offset() );
403 // move v->view_offset towards v->goal_view_offset
404 if ( v->get_goal_view_offset() > v->get_view_offset() ) {
405 if ( v->get_goal_view_offset() - v->get_view_offset() < FG_PI ){
406 v->inc_view_offset( 0.01 );
408 v->inc_view_offset( -0.01 );
411 if ( v->get_view_offset() - v->get_goal_view_offset() < FG_PI ){
412 v->inc_view_offset( -0.01 );
414 v->inc_view_offset( 0.01 );
417 if ( v->get_view_offset() > FG_2PI ) {
418 v->inc_view_offset( -FG_2PI );
419 } else if ( v->get_view_offset() < 0 ) {
420 v->inc_view_offset( FG_2PI );
425 double tmp = -(l->sun_rotation + FG_PI)
426 - (f->get_Psi() - v->get_view_offset() );
427 while ( tmp < 0.0 ) {
430 while ( tmp > FG_2PI ) {
433 /* printf("Psi = %.2f, viewoffset = %.2f sunrot = %.2f rottosun = %.2f\n",
434 FG_Psi * RAD_TO_DEG, v->view_offset * RAD_TO_DEG,
435 -(l->sun_rotation+FG_PI) * RAD_TO_DEG, tmp * RAD_TO_DEG); */
440 void fgInitTimeDepCalcs( void ) {
443 // #ifdef HAVE_SETITIMER
444 // fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
445 // #endif HAVE_SETITIMER
448 static const double alt_adjust_ft = 3.758099;
449 static const double alt_adjust_m = alt_adjust_ft * FEET_TO_METER;
451 // What should we do when we have nothing else to do? Let's get ready
452 // for the next move and update the display?
453 static void fgMainLoop( void ) {
456 static long remainder = 0;
457 long elapsed, multi_loop;
460 static time_t last_time = 0;
461 static int frames = 0;
463 f = current_aircraft.fdm_state;
464 t = &cur_time_params;
466 FG_LOG( FG_ALL, FG_DEBUG, "Running Main Loop");
467 FG_LOG( FG_ALL, FG_DEBUG, "======= ==== ====");
469 #if defined( ENABLE_LINUX_JOYSTICK )
470 // Read joystick and update control settings
472 #elif defined( ENABLE_GLUT_JOYSTICK )
473 // Glut joystick support works by feeding a joystick handler
474 // function to glut. This is taken care of once in the joystick
475 // init routine and we don't have to worry about it again.
478 current_weather.Update();
480 // Fix elevation. I'm just sticking this here for now, it should
481 // probably move eventually
483 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
485 f->get_Runway_altitude() * FEET_TO_METER,
486 f->get_Altitude() * FEET_TO_METER); */
488 if ( scenery.cur_elev > -9990 ) {
489 if ( f->get_Altitude() * FEET_TO_METER <
490 (scenery.cur_elev + alt_adjust_m - 3.0) ) {
491 // now set aircraft altitude above ground
492 printf("Current Altitude = %.2f < %.2f forcing to %.2f\n",
493 f->get_Altitude() * FEET_TO_METER,
494 scenery.cur_elev + alt_adjust_m - 3.0,
495 scenery.cur_elev + alt_adjust_m );
496 fgFDMForceAltitude( current_options.get_flight_model(),
497 scenery.cur_elev + alt_adjust_m );
499 FG_LOG( FG_ALL, FG_DEBUG,
500 "<*> resetting altitude to "
501 << f->get_Altitude() * FEET_TO_METER << " meters" );
503 fgFDMSetGroundElevation( current_options.get_flight_model(),
504 scenery.cur_elev ); // meters
507 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
509 f->get_Runway_altitude() * FEET_TO_METER,
510 f->get_Altitude() * FEET_TO_METER); */
515 // Get elapsed time (in usec) for this past frame
516 elapsed = fgGetTimeInterval();
517 FG_LOG( FG_ALL, FG_DEBUG,
518 "Elapsed time interval is = " << elapsed
519 << ", previous remainder is = " << remainder );
521 // Calculate frame rate average
522 if ( (t->cur_time != last_time) && (last_time > 0) ) {
523 general.set_frame_rate( frames );
524 FG_LOG( FG_ALL, FG_DEBUG,
525 "--> Frame rate is = " << general.get_frame_rate() );
528 last_time = t->cur_time;
531 /* old fps calculation
534 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
535 accum += g->frames[i];
536 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
537 g->frames[i+1] = g->frames[i];
539 g->frames[0] = 1000.0 / (float)elapsed;
540 // printf("frame[0] = %.2f\n", g->frames[0]);
541 accum += g->frames[0];
542 g->frame_rate = accum / (float)FG_FRAME_RATE_HISTORY;
543 // printf("ave = %.2f\n", g->frame_rate);
548 if ( ! use_signals ) {
549 // Calculate model iterations needed for next frame
550 elapsed += remainder;
552 multi_loop = (int)(((double)elapsed * 0.000001) * DEFAULT_MODEL_HZ);
553 remainder = elapsed - ((multi_loop*1000000) / DEFAULT_MODEL_HZ);
554 FG_LOG( FG_ALL, FG_DEBUG,
555 "Model iterations needed = " << multi_loop
556 << ", new remainder = " << remainder );
559 if ( multi_loop > 0 ) {
560 fgUpdateTimeDepCalcs(multi_loop, remainder);
562 FG_LOG( FG_ALL, FG_INFO, "Elapsed time is zero ... we're zinging" );
566 // Do any serial port work that might need to be done
569 // see if we need to load any new scenery tiles
572 // Process/manage pending events
573 global_events.Process();
575 // Run audio scheduler
576 #ifdef ENABLE_AUDIO_SUPPORT
577 if ( current_options.get_sound() && audio_sched->working() ) {
579 # ifdef MICHAEL_JOHNSON_EXPERIMENTAL_ENGINE_AUDIO
581 // note: all these factors are relative to the sample. our
582 // sample format should really contain a conversion factor so
583 // that we can get prop speed right for arbitrary samples.
584 // Note that for normal-size props, there is a point at which
585 // the prop tips approach the speed of sound; that is a pretty
586 // strong limit to how fast the prop can go.
588 // multiplication factor is prime pitch control; add some log
589 // component for verisimilitude
591 double pitch = log((controls.get_throttle(0) * 14.0) + 1.0);
592 //fprintf(stderr, "pitch1: %f ", pitch);
593 if (controls.get_throttle(0) > 0.0 || f->v_rel_wind > 40.0) {
594 //fprintf(stderr, "rel_wind: %f ", f->v_rel_wind);
595 // only add relative wind and AoA if prop is moving
596 // or we're really flying at idle throttle
597 if (pitch < 5.4) { // this needs tuning
598 // prop tips not breaking sound barrier
599 pitch += log(f->v_rel_wind + 0.8)/2;
601 // prop tips breaking sound barrier
602 pitch += log(f->v_rel_wind + 0.8)/10;
604 //fprintf(stderr, "pitch2: %f ", pitch);
605 //fprintf(stderr, "AoA: %f ", FG_Gamma_vert_rad);
607 // Angle of Attack next... -x^3(e^x) is my best guess Just
608 // need to calculate some reasonable scaling factor and
609 // then clamp it on the positive aoa (neg adj) side
610 double aoa = f->get_Gamma_vert_rad() * 2.2;
612 double aoa_adj = pow(-aoa, tmp) * pow(M_E, aoa);
613 if (aoa_adj < -0.8) aoa_adj = -0.8;
615 //fprintf(stderr, "pitch3: %f ", pitch);
617 // don't run at absurdly slow rates -- not realistic
618 // and sounds bad to boot. :-)
619 if (pitch < 0.8) pitch = 0.8;
621 //fprintf(stderr, "pitch4: %f\n", pitch);
623 double volume = controls.get_throttle(0) * 1.15 + 0.3 +
624 log(f->v_rel_wind + 1.0)/14.0;
625 // fprintf(stderr, "volume: %f\n", volume);
627 pitch_envelope.setStep ( 0, 0.01, pitch );
628 volume_envelope.setStep ( 0, 0.01, volume );
632 double param = controls.get_throttle( 0 ) * 2.0 + 1.0;
633 pitch_envelope.setStep ( 0, 0.01, param );
634 volume_envelope.setStep ( 0, 0.01, param );
636 # endif // experimental throttle patch
638 audio_sched -> update();
645 FG_LOG( FG_ALL, FG_DEBUG, "" );
649 // This is the top level master main function that is registered as
653 // The first few passes take care of initialization things (a couple
654 // per pass) and once everything has been initialized fgMainLoop from
657 static void fgIdleFunction ( void ) {
658 // printf("idle state == %d\n", idle_state);
660 if ( idle_state == 0 ) {
661 // Initialize the splash screen right away
662 if ( current_options.get_splash_screen() ) {
667 } else if ( idle_state == 1 ) {
668 // Start the intro music
670 if ( current_options.get_intro_music() ) {
671 string lockfile = "/tmp/mpg123.running";
672 string mp3file = current_options.get_fg_root() +
674 string command = "(touch " + lockfile + "; mpg123 " + mp3file +
675 "> /dev/null 2>&1; /bin/rm " + lockfile + ") &";
676 FG_LOG( FG_GENERAL, FG_INFO,
677 "Starting intro music: " << mp3file );
678 system ( command.c_str() );
683 } else if ( idle_state == 2 ) {
684 // These are a few miscellaneous things that aren't really
685 // "subsystems" but still need to be initialized.
688 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
689 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
694 } else if ( idle_state == 3 ) {
695 // This is the top level init routine which calls all the
696 // other subsystem initialization routines. If you are adding
697 // a subsystem to flight gear, its initialization call should
698 // located in this routine.
699 if( !fgInitSubsystems()) {
700 FG_LOG( FG_GENERAL, FG_ALERT,
701 "Subsystem initializations failed ..." );
706 } else if ( idle_state == 4 ) {
707 // setup OpenGL view parameters
711 // init timer routines, signals, etc. Arrange for an alarm
712 // signal to be generated, etc.
713 fgInitTimeDepCalcs();
717 } else if ( idle_state == 5 ) {
720 } else if ( idle_state == 6 ) {
721 // Initialize audio support
722 #ifdef ENABLE_AUDIO_SUPPORT
725 if ( current_options.get_intro_music() ) {
726 // Let's wait for mpg123 to finish
727 string lockfile = "/tmp/mpg123.running";
728 struct stat stat_buf;
730 FG_LOG( FG_GENERAL, FG_INFO,
731 "Waiting for mpg123 player to finish ..." );
732 while ( stat(lockfile.c_str(), &stat_buf) == 0 ) {
733 // file exist, wait ...
735 FG_LOG( FG_GENERAL, FG_INFO, ".");
737 FG_LOG( FG_GENERAL, FG_INFO, "");
741 audio_sched = new slScheduler ( 8000 );
742 audio_mixer = new smMixer;
743 audio_mixer -> setMasterVolume ( 80 ) ; /* 80% of max volume. */
744 audio_sched -> setSafetyMargin ( 1.0 ) ;
745 string slfile = current_options.get_fg_root() + "/Sounds/wasp.wav";
747 s1 = new slSample ( (char *)slfile.c_str() );
748 FG_LOG( FG_GENERAL, FG_INFO,
749 "Rate = " << s1 -> getRate()
750 << " Bps = " << s1 -> getBps()
751 << " Stereo = " << s1 -> getStereo() );
752 audio_sched -> loopSample ( s1 );
754 if ( audio_sched->working() ) {
755 pitch_envelope.setStep ( 0, 0.01, 0.6 );
756 volume_envelope.setStep ( 0, 0.01, 0.6 );
758 audio_sched -> addSampleEnvelope( s1, 0, 0, &
761 audio_sched -> addSampleEnvelope( s1, 0, 1,
763 SL_VOLUME_ENVELOPE );
766 // strcpy(slfile, path);
767 // strcat(slfile, "thunder.wav");
768 // s2 -> loadFile ( slfile );
769 // s2 -> adjustVolume(0.5);
770 // audio_sched -> playSample ( s2 );
777 if ( idle_state == 1000 ) {
778 // We've finished all our initialization steps, from now on we
779 // run the main loop.
783 if ( current_options.get_splash_screen() == 1 ) {
790 // Handle new window size or exposure
791 static void fgReshape( int width, int height ) {
792 // Do this so we can call fgReshape(0,0) ourselves without having
793 // to know what the values of width & height are.
794 if ( (height > 0) && (width > 0) ) {
795 if ( ! current_options.get_panel_status() ) {
796 current_view.set_win_ratio( (GLfloat) width / (GLfloat) height );
798 current_view.set_win_ratio( (GLfloat) width /
799 ((GLfloat) (height)*0.4232) );
803 current_view.set_winWidth( width );
804 current_view.set_winHeight( height );
805 current_view.force_update_fov_math();
807 // Inform gl of our view window size (now handled elsewhere)
808 // xglViewport(0, 0, (GLint)width, (GLint)height);
809 if ( idle_state == 1000 ) {
810 // yes we've finished all our initializations and are running
811 // the main loop, so this will now work without seg faulting
813 current_view.UpdateViewParams();
814 if ( current_options.get_panel_status() ) {
815 fgPanelReInit(0, 0, 1024, 768);
821 // Initialize GLUT and define a main window
822 int fgGlutInit( int *argc, char **argv ) {
823 // GLUT will extract all glut specific options so later on we only
824 // need wory about our own.
825 xglutInit(argc, argv);
827 // Define Display Parameters
828 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
830 FG_LOG( FG_GENERAL, FG_INFO, "Opening a window: " <<
831 current_options.get_xsize() << "x" << current_options.get_ysize() );
833 // Define initial window size
834 xglutInitWindowSize( current_options.get_xsize(),
835 current_options.get_ysize() );
837 // Initialize windows
838 if ( current_options.get_game_mode() == 0 ) {
839 // Open the regular window
840 xglutCreateWindow("Flight Gear");
842 // Open the cool new 'game mode' window
843 char game_mode_str[256];
844 sprintf( game_mode_str, "width=%d height=%d bpp=16",
845 current_options.get_xsize(),
846 current_options.get_ysize() );
848 FG_LOG( FG_GENERAL, FG_INFO,
849 "game mode params = " << game_mode_str );
850 glutGameModeString( game_mode_str );
854 // This seems to be the absolute earliest in the init sequence
855 // that these calls will return valid info. Too bad it's after
856 // we've already created and sized out window. :-(
857 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
858 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
859 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
861 FG_LOG ( FG_GENERAL, FG_INFO, general.get_glRenderer() );
864 // try to determine if we should adjust the initial default
865 // display resolution. The options class defaults (is
866 // initialized) to 640x480.
867 string renderer = general.glRenderer;
869 // currently we only know how to deal with Mesa/Glide/Voodoo cards
870 if ( renderer.find( "Glide" ) != string::npos ) {
871 FG_LOG( FG_GENERAL, FG_INFO, "Detected a Glide driver" );
872 if ( renderer.find( "FB/8" ) != string::npos ) {
873 // probably a voodoo-2
874 if ( renderer.find( "TMU/SLI" ) != string::npos ) {
875 // probably two SLI'd Voodoo-2's
876 current_options.set_xsize( 1024 );
877 current_options.set_ysize( 768 );
878 FG_LOG( FG_GENERAL, FG_INFO,
879 "It looks like you have two sli'd voodoo-2's." << endl
880 << "upgrading your win resolution to 1024 x 768" );
881 glutReshapeWindow(1024, 768);
883 // probably a single non-SLI'd Voodoo-2
884 current_options.set_xsize( 800 );
885 current_options.set_ysize( 600 );
886 FG_LOG( FG_GENERAL, FG_INFO,
887 "It looks like you have a voodoo-2." << endl
888 << "upgrading your win resolution to 800 x 600" );
889 glutReshapeWindow(800, 600);
891 } else if ( renderer.find( "FB/2" ) != string::npos ) {
892 // probably a voodoo-1, stick with the default
895 // we have no special knowledge of this card, stick with the default
903 // Initialize GLUT event handlers
904 int fgGlutInitEvents( void ) {
905 // call fgReshape() on window resizes
906 xglutReshapeFunc( fgReshape );
908 // call GLUTkey() on keyboard event
909 xglutKeyboardFunc( GLUTkey );
910 glutSpecialFunc( GLUTspecialkey );
912 // call guiMouseFunc() whenever our little rodent is used
913 glutMouseFunc ( guiMouseFunc );
914 glutMotionFunc (guiMotionFunc );
915 glutPassiveMotionFunc (guiMotionFunc );
917 // call fgMainLoop() whenever there is
918 // nothing else to do
919 xglutIdleFunc( fgIdleFunction );
922 xglutDisplayFunc( fgRenderFrame );
929 int main( int argc, char **argv ) {
932 f = current_aircraft.fdm_state;
935 _control87(MCW_EM, MCW_EM); /* defined in float.h */
938 // Initialize the [old] debugging output system
941 // set default log levels
942 fglog().setLogLevels( FG_ALL, FG_INFO );
944 FG_LOG( FG_GENERAL, FG_INFO, "Flight Gear: Version " << VERSION << endl );
948 FG_LOG( FG_GENERAL, FG_INFO, "General Initialization" );
949 FG_LOG( FG_GENERAL, FG_INFO, "======= ==============" );
951 // Attempt to locate and parse a config file
952 // First check fg_root
953 string config = current_options.get_fg_root() + "/system.fgfsrc";
954 current_options.parse_config_file( config );
956 // Next check home directory
957 char* envp = ::getenv( "HOME" );
958 if ( envp != NULL ) {
960 config += "/.fgfsrc";
961 current_options.parse_config_file( config );
964 // Parse remaining command line options
965 // These will override anything specified in a config file
966 if ( current_options.parse_command_line(argc, argv) !=
967 fgOPTIONS::FG_OPTIONS_OK )
969 // Something must have gone horribly wrong with the command
970 // line parsing or maybe the user just requested help ... :-)
971 current_options.usage();
972 FG_LOG( FG_GENERAL, FG_ALERT, "\nExiting ...");
973 // cout << endl << "Exiting ..." << endl;
977 // Initialize the Window/Graphics environment.
978 if( !fgGlutInit(&argc, argv) ) {
979 FG_LOG( FG_GENERAL, FG_ALERT, "GLUT initialization failed ..." );
983 // Initialize the various GLUT Event Handlers.
984 if( !fgGlutInitEvents() ) {
985 FG_LOG( FG_GENERAL, FG_ALERT,
986 "GLUT event handler initialization failed ..." );
990 // First do some quick general initializations
991 if( !fgInitGeneral()) {
992 FG_LOG( FG_GENERAL, FG_ALERT,
993 "General initializations failed ..." );
997 // Init the user interface (we need to do this before passing off
1001 // pass control off to the master GLUT event handler
1004 // we never actually get here ... but just in case ... :-)
1010 // Revision 1.85 1999/02/05 21:29:08 curt
1011 // Modifications to incorporate Jon S. Berndts flight model code.
1013 // Revision 1.84 1999/02/02 20:13:34 curt
1014 // MSVC++ portability changes by Bernie Bright:
1016 // Lib/Serial/serial.[ch]xx: Initial Windows support - incomplete.
1017 // Simulator/Astro/stars.cxx: typo? included <stdio> instead of <cstdio>
1018 // Simulator/Cockpit/hud.cxx: Added Standard headers
1019 // Simulator/Cockpit/panel.cxx: Redefinition of default parameter
1020 // Simulator/Flight/flight.cxx: Replaced cout with FG_LOG. Deleted <stdio.h>
1021 // Simulator/Main/fg_init.cxx:
1022 // Simulator/Main/GLUTmain.cxx:
1023 // Simulator/Main/options.hxx: Shuffled <fg_serial.hxx> dependency
1024 // Simulator/Objects/material.hxx:
1025 // Simulator/Time/timestamp.hxx: VC++ friend kludge
1026 // Simulator/Scenery/tile.[ch]xx: Fixed using std::X declarations
1027 // Simulator/Main/views.hxx: Added a constant
1029 // Revision 1.83 1999/01/27 04:49:17 curt
1030 // Game mode fixes from Norman Vine.
1031 // Initial altitude setting tweaks and fixes (especially for when starting
1032 // below sea level.)
1034 // Revision 1.82 1999/01/20 13:42:24 curt
1035 // Tweaked FDM interface.
1036 // Testing check sum support for NMEA serial output.
1038 // Revision 1.81 1999/01/19 20:57:03 curt
1039 // MacOS portability changes contributed by "Robert Puyol" <puyol@abvent.fr>
1041 // Revision 1.80 1999/01/09 13:37:40 curt
1042 // Convert fgTIMESTAMP to FGTimeStamp which holds usec instead of ms.
1044 // Revision 1.79 1999/01/08 03:23:56 curt
1045 // Beginning work on compensating for sim time vs. real world time "jitter".
1047 // Revision 1.78 1999/01/07 20:25:08 curt
1048 // Updated struct fgGENERAL to class FGGeneral.
1050 // Revision 1.77 1998/12/18 23:40:55 curt
1051 // New frame rate counting mechanism.
1053 // Revision 1.76 1998/12/11 20:26:26 curt
1054 // Fixed view frustum culling accuracy bug so we can look out the sides and
1055 // back without tri-stripes dropping out.
1057 // Revision 1.75 1998/12/09 18:50:23 curt
1058 // Converted "class fgVIEW" to "class FGView" and updated to make data
1059 // members private and make required accessor functions.
1061 // Revision 1.74 1998/12/06 14:52:54 curt
1062 // Fixed a problem with the initial starting altitude. "v->abs_view_pos" wasn't
1063 // being calculated correctly at the beginning causing the first terrain
1064 // intersection to fail, returning a ground altitude of zero, causing the plane
1065 // to free fall for one frame, until the ground altitude was corrected, but now
1066 // being under the ground we got a big bounce and the plane always ended up
1069 // Revision 1.73 1998/12/06 13:51:22 curt
1070 // Turned "struct fgWEATHER" into "class FGWeather".
1072 // Revision 1.72 1998/12/05 15:54:18 curt
1073 // Renamed class fgFLIGHT to class FGState as per request by JSB.
1075 // Revision 1.71 1998/12/05 14:19:51 curt
1076 // Looking into a problem with cur_view_params.abs_view_pos initialization.
1078 // Revision 1.70 1998/12/03 01:17:14 curt
1079 // Converted fgFLIGHT to a class.
1081 // Revision 1.69 1998/11/23 20:51:26 curt
1082 // Fiddling with when I can get info from the opengl driver.
1084 // Revision 1.68 1998/11/20 01:02:35 curt
1085 // Try to detect Mesa/Glide/Voodoo and chose the appropriate resolution.
1087 // Revision 1.67 1998/11/16 13:59:58 curt
1088 // Added pow() macro bug work around.
1089 // Added support for starting FGFS at various resolutions.
1090 // Added some initial serial port support.
1091 // Specify default log levels in main().
1093 // Revision 1.66 1998/11/11 00:24:00 curt
1094 // Added Michael Johnson's audio patches for testing.
1095 // Also did a few tweaks to avoid numerical problems when starting at a place
1096 // with no (or bogus) scenery.
1098 // Revision 1.65 1998/11/09 23:39:22 curt
1099 // Tweaks for the instrument panel.
1101 // Revision 1.64 1998/11/07 19:07:09 curt
1102 // Enable release builds using the --without-logging option to the configure
1103 // script. Also a couple log message cleanups, plus some C to C++ comment
1106 // Revision 1.63 1998/11/06 21:18:08 curt
1107 // Converted to new logstream debugging facility. This allows release
1108 // builds with no messages at all (and no performance impact) by using
1109 // the -DFG_NDEBUG flag.
1111 // Revision 1.62 1998/10/27 02:14:35 curt
1112 // Changes to support GLUT joystick routines as fall back.
1114 // Revision 1.61 1998/10/25 14:08:47 curt
1115 // Turned "struct fgCONTROLS" into a class, with inlined accessor functions.
1117 // Revision 1.60 1998/10/25 10:57:18 curt
1118 // Changes to use the new joystick library if it is available.
1120 // Revision 1.59 1998/10/17 01:34:21 curt
1123 // Revision 1.58 1998/10/16 23:27:52 curt
1126 // Revision 1.57 1998/10/16 00:54:00 curt
1127 // Converted to Point3D class.
1129 // Revision 1.56 1998/10/02 12:46:47 curt
1130 // Added an "auto throttle"
1132 // Revision 1.55 1998/09/29 14:58:18 curt
1133 // Use working() instead of !not_working() for audio.
1135 // Revision 1.54 1998/09/29 02:03:38 curt
1138 // Revision 1.53 1998/09/26 13:18:35 curt
1139 // Check if audio "working()" before doing audio manipulations.
1141 // Revision 1.52 1998/09/25 16:02:07 curt
1142 // Added support for pitch and volume envelopes and tied them to the
1143 // throttle setting.
1145 // Revision 1.51 1998/09/15 04:27:28 curt
1146 // Changes for new Astro code.
1148 // Revision 1.50 1998/09/15 02:09:24 curt
1149 // Include/fg_callback.hxx
1150 // Moved code inline to stop g++ 2.7 from complaining.
1152 // Simulator/Time/event.[ch]xx
1153 // Changed return type of fgEVENT::printStat(). void caused g++ 2.7 to
1154 // complain bitterly.
1156 // Minor bugfix and changes.
1158 // Simulator/Main/GLUTmain.cxx
1159 // Added missing type to idle_state definition - eliminates a warning.
1161 // Simulator/Main/fg_init.cxx
1162 // Changes to airport lookup.
1164 // Simulator/Main/options.cxx
1165 // Uses fg_gzifstream when loading config file.
1167 // Revision 1.49 1998/09/09 16:25:39 curt
1168 // Only use GLUT_STENCIL if the instument panel has been requested.
1170 // Revision 1.48 1998/08/28 18:15:03 curt
1171 // Added new cockpit code from Friedemann Reinhard
1172 // <mpt218@faupt212.physik.uni-erlangen.de>
1174 // Revision 1.47 1998/08/27 17:02:04 curt
1175 // Contributions from Bernie Bright <bbright@c031.aone.net.au>
1176 // - use strings for fg_root and airport_id and added methods to return
1178 // - inlined all access methods,
1179 // - made the parsing functions private methods,
1180 // - deleted some unused functions.
1181 // - propogated some of these changes out a bit further.
1183 // Revision 1.46 1998/08/22 14:49:56 curt
1184 // Attempting to iron out seg faults and crashes.
1185 // Did some shuffling to fix a initialization order problem between view
1186 // position, scenery elevation.
1188 // Revision 1.45 1998/08/20 20:32:31 curt
1189 // Reshuffled some of the code in and around views.[ch]xx
1191 // Revision 1.44 1998/08/20 15:10:33 curt
1192 // Added GameGLUT support.
1194 // Revision 1.43 1998/08/12 21:01:47 curt
1195 // Master volume from 30% -> 80%
1197 // Revision 1.42 1998/07/30 23:48:25 curt
1198 // Output position & orientation when pausing.
1199 // Eliminated libtool use.
1200 // Added options to specify initial position and orientation.
1201 // Changed default fov to 55 degrees.
1202 // Added command line option to start in paused or unpaused state.
1204 // Revision 1.41 1998/07/27 18:41:24 curt
1205 // Added a pause command "p"
1206 // Fixed some initialization order problems between pui and glut.
1207 // Added an --enable/disable-sound option.
1209 // Revision 1.40 1998/07/24 21:56:59 curt
1210 // 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.
1212 // Revision 1.39 1998/07/24 21:39:08 curt
1213 // Debugging output tweaks.
1214 // Cast glGetString to (char *) to avoid compiler errors.
1215 // Optimizations to fgGluLookAt() by Norman Vine.
1217 // Revision 1.38 1998/07/22 21:40:43 curt
1218 // Clear to adjusted fog color (for sunrise/sunset effects)
1219 // Make call to fog sunrise/sunset adjustment method.
1220 // Add a stdc++ library bug work around to fg_init.cxx
1222 // Revision 1.37 1998/07/20 12:49:44 curt
1223 // Tweaked color buffer clearing defaults. We clear the color buffer if we
1224 // are doing textures. Assumptions: If we are doing textures we have hardware
1225 // support that can clear the color buffer for "free." If we are doing software
1226 // rendering with textures, then the extra clear time gets lost in the noise.
1228 // Revision 1.36 1998/07/16 17:33:35 curt
1229 // "H" / "h" now control hud brightness as well with off being one of the
1231 // Better checking for xmesa/fx 3dfx fullscreen/window support for deciding
1232 // whether or not to build in the feature.
1233 // Translucent menu support.
1234 // HAVE_AUDIO_SUPPORT -> ENABLE_AUDIO_SUPPORT
1235 // Use fork() / wait() for playing mp3 init music in background under unix.
1236 // Changed default tile diameter to 5.
1238 // Revision 1.35 1998/07/13 21:01:36 curt
1239 // Wrote access functions for current fgOPTIONS.
1241 // Revision 1.34 1998/07/13 15:32:37 curt
1242 // Clear color buffer if drawing wireframe.
1243 // When specifying and airport, start elevation at -1000 and let the system
1244 // position you at ground level.
1246 // Revision 1.33 1998/07/12 03:14:42 curt
1247 // Added ground collision detection.
1248 // Did some serious horsing around to be able to "hug" the ground properly
1249 // and still be able to take off.
1250 // Set the near clip plane to 1.0 meters when less than 10 meters above the
1252 // Did some serious horsing around getting the initial airplane position to be
1253 // correct based on rendered terrain elevation.
1254 // Added a little cheat/hack that will prevent the view position from ever
1255 // dropping below the terrain, even when the flight model doesn't quite
1256 // put you as high as you'd like.
1258 // Revision 1.32 1998/07/08 14:45:07 curt
1259 // polar3d.h renamed to polar3d.hxx
1260 // vector.h renamed to vector.hxx
1261 // updated audio support so it waits to create audio classes (and tie up
1262 // /dev/dsp) until the mpg123 player is finished.
1264 // Revision 1.31 1998/07/06 21:34:17 curt
1265 // Added an enable/disable splash screen option.
1266 // Added an enable/disable intro music option.
1267 // Added an enable/disable instrument panel option.
1268 // Added an enable/disable mouse pointer option.
1269 // Added using namespace std for compilers that support this.
1271 // Revision 1.30 1998/07/06 02:42:03 curt
1272 // Added support for switching between fullscreen and window mode for
1275 // Added a basic splash screen. Restructured the main loop and top level
1276 // initialization routines to do this.
1278 // Hacked in some support for playing a startup mp3 sound file while rest
1279 // of sim initializes. Currently only works in Unix using the mpg123 player.
1280 // Waits for the mpg123 player to finish before initializing internal
1283 // Revision 1.29 1998/07/04 00:52:22 curt
1284 // Add my own version of gluLookAt() (which is nearly identical to the
1285 // Mesa/glu version.) But, by calculating the Model View matrix our selves
1286 // we can save this matrix without having to read it back in from the video
1287 // card. This hopefully allows us to save a few cpu cycles when rendering
1288 // out the fragments because we can just use glLoadMatrixd() with the
1289 // precalculated matrix for each tile rather than doing a push(), translate(),
1290 // pop() for every fragment.
1292 // Panel status defaults to off for now until it gets a bit more developed.
1294 // Extract OpenGL driver info on initialization.
1296 // Revision 1.28 1998/06/27 16:54:32 curt
1297 // Replaced "extern displayInstruments" with a entry in fgOPTIONS.
1298 // Don't change the view port when displaying the panel.
1300 // Revision 1.27 1998/06/17 21:35:10 curt
1301 // Refined conditional audio support compilation.
1302 // Moved texture parameter setup calls to ../Scenery/materials.cxx
1303 // #include <string.h> before various STL includes.
1304 // Make HUD default state be enabled.
1306 // Revision 1.26 1998/06/13 00:40:32 curt
1307 // Tweaked fog command line options.
1309 // Revision 1.25 1998/06/12 14:27:26 curt
1310 // Pui -> PUI, Gui -> GUI.
1312 // Revision 1.24 1998/06/12 00:57:39 curt
1313 // Added support for Pui/Gui.
1314 // Converted fog to GL_FOG_EXP2.
1315 // Link to static simulator parts.
1316 // Update runfg.bat to try to be a little smarter.
1318 // Revision 1.23 1998/06/08 17:57:04 curt
1319 // Minor sound/startup position tweaks.
1321 // Revision 1.22 1998/06/05 18:18:40 curt
1322 // A bit of fiddling with audio ...
1324 // Revision 1.21 1998/06/03 22:01:06 curt
1325 // Tweaking sound library usage.
1327 // Revision 1.20 1998/06/03 00:47:11 curt
1328 // Updated to compile in audio support if OSS available.
1329 // Updated for new version of Steve's audio library.
1330 // STL includes don't use .h
1331 // Small view optimizations.
1333 // Revision 1.19 1998/06/01 17:54:40 curt
1334 // Added Linux audio support.
1335 // avoid glClear( COLOR_BUFFER_BIT ) when not using it to set the sky color.
1338 // Revision 1.18 1998/05/29 20:37:19 curt
1339 // Tweaked material properties & lighting a bit in GLUTmain.cxx.
1340 // Read airport list into a "map" STL for dynamic list sizing and fast tree
1343 // Revision 1.17 1998/05/22 21:28:52 curt
1344 // Modifications to use the new fgEVENT_MGR class.
1346 // Revision 1.16 1998/05/20 20:51:33 curt
1347 // Tweaked smooth shaded texture lighting properties.
1348 // Converted fgLIGHT to a C++ class.
1350 // Revision 1.15 1998/05/16 13:08:34 curt
1351 // C++ - ified views.[ch]xx
1352 // Shuffled some additional view parameters into the fgVIEW class.
1353 // Changed tile-radius to tile-diameter because it is a much better
1355 // Added a WORLD_TO_EYE transformation to views.cxx. This allows us
1356 // to transform world space to eye space for view frustum culling.
1358 // Revision 1.14 1998/05/13 18:29:57 curt
1359 // Added a keyboard binding to dynamically adjust field of view.
1360 // Added a command line option to specify fov.
1361 // Adjusted terrain color.
1362 // Root path info moved to fgOPTIONS.
1363 // Added ability to parse options out of a config file.
1365 // Revision 1.13 1998/05/11 18:18:15 curt
1366 // For flat shading use "glHint (GL_FOG_HINT, GL_FASTEST )"
1368 // Revision 1.12 1998/05/07 23:14:15 curt
1369 // Added "D" key binding to set autopilot heading.
1370 // Made frame rate calculation average out over last 10 frames.
1371 // Borland C++ floating point exception workaround.
1372 // Added a --tile-radius=n option.
1374 // Revision 1.11 1998/05/06 03:16:23 curt
1375 // Added an averaged global frame rate counter.
1376 // Added an option to control tile radius.
1378 // Revision 1.10 1998/05/03 00:47:31 curt
1379 // Added an option to enable/disable full-screen mode.
1381 // Revision 1.9 1998/04/30 12:34:17 curt
1382 // Added command line rendering options:
1383 // enable/disable fog/haze
1384 // specify smooth/flat shading
1385 // disable sky blending and just use a solid color
1386 // enable wireframe drawing mode
1388 // Revision 1.8 1998/04/28 01:20:21 curt
1389 // Type-ified fgTIME and fgVIEW.
1390 // Added a command line option to disable textures.
1392 // Revision 1.7 1998/04/26 05:10:02 curt
1393 // "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
1395 // Revision 1.6 1998/04/25 22:06:30 curt
1396 // Edited cvs log messages in source files ... bad bad bad!
1398 // Revision 1.5 1998/04/25 20:24:01 curt
1399 // Cleaned up initialization sequence to eliminate interdependencies
1400 // between sun position, lighting, and view position. This creates a
1401 // valid single pass initialization path.
1403 // Revision 1.4 1998/04/24 14:19:30 curt
1406 // Revision 1.3 1998/04/24 00:49:18 curt
1407 // Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
1408 // Trying out some different option parsing code.
1409 // Some code reorganization.
1411 // Revision 1.2 1998/04/22 13:25:41 curt
1412 // C++ - ifing the code.
1413 // Starting a bit of reorganization of lighting code.
1415 // Revision 1.1 1998/04/21 17:02:39 curt
1416 // Prepairing for C++ integration.
1418 // Revision 1.71 1998/04/18 04:11:26 curt
1419 // Moved fg_debug to it's own library, added zlib support.
1421 // Revision 1.70 1998/04/14 02:21:02 curt
1422 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
1423 // <jgoeke@voyager.net>
1425 // Revision 1.69 1998/04/08 23:35:34 curt
1426 // Tweaks to Gnu automake/autoconf system.
1428 // Revision 1.68 1998/04/03 22:09:03 curt
1429 // Converting to Gnu autoconf system.
1431 // Revision 1.67 1998/03/23 21:24:37 curt
1432 // Source code formating tweaks.
1434 // Revision 1.66 1998/03/14 00:31:20 curt
1435 // Beginning initial terrain texturing experiments.
1437 // Revision 1.65 1998/03/09 22:45:57 curt
1438 // Minor tweaks for building on sparc platform.
1440 // Revision 1.64 1998/02/20 00:16:23 curt
1441 // Thursday's tweaks.
1443 // Revision 1.63 1998/02/16 16:17:39 curt
1446 // Revision 1.62 1998/02/16 13:39:42 curt
1447 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
1448 // tiles to occasionally be missing.
1450 // Revision 1.61 1998/02/12 21:59:46 curt
1451 // Incorporated code changes contributed by Charlie Hotchkiss
1452 // <chotchkiss@namg.us.anritsu.com>
1454 // Revision 1.60 1998/02/11 02:50:40 curt
1457 // Revision 1.59 1998/02/09 22:56:54 curt
1458 // Removed "depend" files from cvs control. Other minor make tweaks.
1460 // Revision 1.58 1998/02/09 15:07:49 curt
1463 // Revision 1.57 1998/02/07 15:29:40 curt
1464 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
1465 // <chotchkiss@namg.us.anritsu.com>
1467 // Revision 1.56 1998/02/03 23:20:23 curt
1468 // Lots of little tweaks to fix various consistency problems discovered by
1469 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
1470 // passed arguments along to the real printf(). Also incorporated HUD changes
1471 // by Michele America.
1473 // Revision 1.55 1998/02/02 20:53:58 curt
1474 // Incorporated Durk's changes.
1476 // Revision 1.54 1998/01/31 00:43:10 curt
1477 // Added MetroWorks patches from Carmen Volpe.
1479 // Revision 1.53 1998/01/27 18:35:54 curt
1482 // Revision 1.52 1998/01/27 00:47:56 curt
1483 // Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
1484 // system and commandline/config file processing code.
1486 // Revision 1.51 1998/01/26 15:57:05 curt
1487 // Tweaks for dynamic scenery development.
1489 // Revision 1.50 1998/01/19 19:27:07 curt
1490 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
1491 // This should simplify things tremendously.
1493 // Revision 1.49 1998/01/19 18:40:31 curt
1494 // Tons of little changes to clean up the code and to remove fatal errors
1495 // when building with the c++ compiler.
1497 // Revision 1.48 1998/01/19 18:35:46 curt
1498 // Minor tweaks and fixes for cygwin32.
1500 // Revision 1.47 1998/01/13 00:23:08 curt
1501 // Initial changes to support loading and management of scenery tiles. Note,
1502 // there's still a fair amount of work left to be done.
1504 // Revision 1.46 1998/01/08 02:22:06 curt
1505 // Beginning to integrate Tile management subsystem.
1507 // Revision 1.45 1998/01/07 03:18:55 curt
1508 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
1510 // Revision 1.44 1997/12/30 22:22:31 curt
1511 // Further integration of event manager.
1513 // Revision 1.43 1997/12/30 20:47:43 curt
1514 // Integrated new event manager with subsystem initializations.
1516 // Revision 1.42 1997/12/30 16:36:47 curt
1517 // Merged in Durk's changes ...
1519 // Revision 1.41 1997/12/30 13:06:56 curt
1520 // A couple lighting tweaks ...
1522 // Revision 1.40 1997/12/30 01:38:37 curt
1523 // Switched back to per vertex normals and smooth shading for terrain.
1525 // Revision 1.39 1997/12/22 23:45:45 curt
1526 // First stab at sunset/sunrise sky glow effects.
1528 // Revision 1.38 1997/12/22 04:14:28 curt
1529 // Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
1531 // Revision 1.37 1997/12/19 23:34:03 curt
1532 // Lot's of tweaking with sky rendering and lighting.
1534 // Revision 1.36 1997/12/19 16:44:57 curt
1535 // Working on scene rendering order and options.
1537 // Revision 1.35 1997/12/18 23:32:32 curt
1538 // First stab at sky dome actually starting to look reasonable. :-)
1540 // Revision 1.34 1997/12/17 23:13:34 curt
1541 // Began working on rendering a sky.
1543 // Revision 1.33 1997/12/15 23:54:45 curt
1544 // Add xgl wrappers for debugging.
1545 // Generate terrain normals on the fly.
1547 // Revision 1.32 1997/12/15 20:59:08 curt
1550 // Revision 1.31 1997/12/12 21:41:25 curt
1551 // More light/material property tweaking ... still a ways off.
1553 // Revision 1.30 1997/12/12 19:52:47 curt
1554 // Working on lightling and material properties.
1556 // Revision 1.29 1997/12/11 04:43:54 curt
1557 // Fixed sun vector and lighting problems. I thing the moon is now lit
1560 // Revision 1.28 1997/12/10 22:37:45 curt
1561 // Prepended "fg" on the name of all global structures that didn't have it yet.
1562 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
1564 // Revision 1.27 1997/12/09 05:11:54 curt
1565 // Working on tweaking lighting.
1567 // Revision 1.26 1997/12/09 04:25:29 curt
1568 // Working on adding a global lighting params structure.
1570 // Revision 1.25 1997/12/08 22:54:09 curt
1571 // Enabled GL_CULL_FACE.
1573 // Revision 1.24 1997/11/25 19:25:32 curt
1574 // Changes to integrate Durk's moon/sun code updates + clean up.
1576 // Revision 1.23 1997/11/15 18:16:34 curt
1579 // Revision 1.22 1997/10/30 12:38:41 curt
1580 // Working on new scenery subsystem.
1582 // Revision 1.21 1997/09/23 00:29:38 curt
1583 // Tweaks to get things to compile with gcc-win32.
1585 // Revision 1.20 1997/09/22 14:44:19 curt
1586 // Continuing to try to align stars correctly.
1588 // Revision 1.19 1997/09/18 16:20:08 curt
1589 // At dusk/dawn add/remove stars in stages.
1591 // Revision 1.18 1997/09/16 22:14:51 curt
1592 // Tweaked time of day lighting equations. Don't draw stars during the day.
1594 // Revision 1.17 1997/09/16 15:50:29 curt
1595 // Working on star alignment and time issues.
1597 // Revision 1.16 1997/09/13 02:00:06 curt
1598 // Mostly working on stars and generating sidereal time for accurate star
1601 // Revision 1.15 1997/09/05 14:17:27 curt
1602 // More tweaking with stars.
1604 // Revision 1.14 1997/09/05 01:35:53 curt
1605 // Working on getting stars right.
1607 // Revision 1.13 1997/09/04 02:17:34 curt
1610 // Revision 1.12 1997/08/27 21:32:24 curt
1611 // Restructured view calculation code. Added stars.
1613 // Revision 1.11 1997/08/27 03:30:16 curt
1614 // Changed naming scheme of basic shared structures.
1616 // Revision 1.10 1997/08/25 20:27:22 curt
1617 // Merged in initial HUD and Joystick code.
1619 // Revision 1.9 1997/08/22 21:34:39 curt
1620 // Doing a bit of reorganizing and house cleaning.
1622 // Revision 1.8 1997/08/19 23:55:03 curt
1623 // Worked on better simulating real lighting.
1625 // Revision 1.7 1997/08/16 12:22:38 curt
1626 // Working on improving the lighting/shading.
1628 // Revision 1.6 1997/08/13 20:24:56 curt
1629 // Changes due to changing sunpos interface.
1631 // Revision 1.5 1997/08/06 21:08:32 curt
1632 // Sun position now really* works (I think) ... I still have sun time warping
1633 // code in place, probably should remove it soon.
1635 // Revision 1.4 1997/08/06 15:41:26 curt
1636 // Working on correct sun position.
1638 // Revision 1.3 1997/08/06 00:24:22 curt
1639 // Working on correct real time sun lighting.
1641 // Revision 1.2 1997/08/04 20:25:15 curt
1642 // Organizational tweaking.
1644 // Revision 1.1 1997/08/02 18:45:00 curt
1645 // Renamed GLmain.c GLUTmain.c
1647 // Revision 1.43 1997/08/02 16:23:47 curt
1650 // Revision 1.42 1997/08/01 19:43:33 curt
1651 // Making progress with coordinate system overhaul.
1653 // Revision 1.41 1997/07/31 22:52:37 curt
1654 // Working on redoing internal coordinate systems & scenery transformations.
1656 // Revision 1.40 1997/07/30 16:12:42 curt
1657 // Moved fg_random routines from Util/ to Math/
1659 // Revision 1.39 1997/07/21 14:45:01 curt
1662 // Revision 1.38 1997/07/19 23:04:47 curt
1663 // Added an initial weather section.
1665 // Revision 1.37 1997/07/19 22:34:02 curt
1666 // Moved PI definitions to ../constants.h
1667 // Moved random() stuff to ../Utils/ and renamed fg_random()
1669 // Revision 1.36 1997/07/18 23:41:25 curt
1670 // Tweaks for building with Cygnus Win32 compiler.
1672 // Revision 1.35 1997/07/18 14:28:34 curt
1673 // Hacked in some support for wind/turbulence.
1675 // Revision 1.34 1997/07/16 20:04:48 curt
1676 // Minor tweaks to aid Win32 port.
1678 // Revision 1.33 1997/07/12 03:50:20 curt
1679 // Added an #include <Windows32/Base.h> to help compiling for Win32
1681 // Revision 1.32 1997/07/11 03:23:18 curt
1682 // Solved some scenery display/orientation problems. Still have a positioning
1683 // (or transformation?) problem.
1685 // Revision 1.31 1997/07/11 01:29:58 curt
1686 // More tweaking of terrian floor.
1688 // Revision 1.30 1997/07/10 04:26:37 curt
1689 // We now can interpolated ground elevation for any position in the grid. We
1690 // can use this to enforce a "hard" ground. We still need to enforce some
1691 // bounds checking so that we don't try to lookup data points outside the
1694 // Revision 1.29 1997/07/09 21:31:12 curt
1695 // Working on making the ground "hard."
1697 // Revision 1.28 1997/07/08 18:20:12 curt
1698 // Working on establishing a hard ground.
1700 // Revision 1.27 1997/07/07 20:59:49 curt
1701 // Working on scenery transformations to enable us to fly fluidly over the
1702 // poles with no discontinuity/distortion in scenery.
1704 // Revision 1.26 1997/07/05 20:43:34 curt
1705 // renamed mat3 directory to Math so we could add other math related routines.
1707 // Revision 1.25 1997/06/29 21:19:17 curt
1708 // Working on scenery management system.
1710 // Revision 1.24 1997/06/26 22:14:53 curt
1711 // Beginning work on a scenery management system.
1713 // Revision 1.23 1997/06/26 19:08:33 curt
1714 // Restructuring make, adding automatic "make dep" support.
1716 // Revision 1.22 1997/06/25 15:39:47 curt
1717 // Minor changes to compile with rsxnt/win32.
1719 // Revision 1.21 1997/06/22 21:44:41 curt
1720 // Working on intergrating the VRML (subset) parser.
1722 // Revision 1.20 1997/06/21 17:12:53 curt
1723 // Capitalized subdirectory names.
1725 // Revision 1.19 1997/06/18 04:10:31 curt
1726 // A couple more runway tweaks ...
1728 // Revision 1.18 1997/06/18 02:21:24 curt
1729 // Hacked in a runway
1731 // Revision 1.17 1997/06/17 16:51:58 curt
1732 // Timer interval stuff now uses gettimeofday() instead of ftime()
1734 // Revision 1.16 1997/06/17 04:19:16 curt
1735 // More timer related tweaks with respect to view direction changes.
1737 // Revision 1.15 1997/06/17 03:41:10 curt
1738 // Nonsignal based interval timing is now working.
1739 // This would be a good time to look at cleaning up the code structure a bit.
1741 // Revision 1.14 1997/06/16 19:32:51 curt
1742 // Starting to add general timer support.
1744 // Revision 1.13 1997/06/02 03:40:06 curt
1745 // A tiny bit more view tweaking.
1747 // Revision 1.12 1997/06/02 03:01:38 curt
1748 // Working on views (side, front, back, transitions, etc.)
1750 // Revision 1.11 1997/05/31 19:16:25 curt
1751 // Elevator trim added.
1753 // Revision 1.10 1997/05/31 04:13:52 curt
1754 // WE CAN NOW FLY!!!
1756 // Continuing work on the LaRCsim flight model integration.
1757 // Added some MSFS-like keyboard input handling.
1759 // Revision 1.9 1997/05/30 19:27:01 curt
1760 // The LaRCsim flight model is starting to look like it is working.
1762 // Revision 1.8 1997/05/30 03:54:10 curt
1763 // Made a bit more progress towards integrating the LaRCsim flight model.
1765 // Revision 1.7 1997/05/29 22:39:49 curt
1766 // Working on incorporating the LaRCsim flight model.
1768 // Revision 1.6 1997/05/29 12:31:39 curt
1769 // Minor tweaks, moving towards general flight model integration.
1771 // Revision 1.5 1997/05/29 02:33:23 curt
1772 // Updated to reflect changing interfaces in other "modules."
1774 // Revision 1.4 1997/05/27 17:44:31 curt
1775 // Renamed & rearranged variables and routines. Added some initial simple
1776 // timer/alarm routines so the flight model can be updated on a regular
1779 // Revision 1.3 1997/05/23 15:40:25 curt
1780 // Added GNU copyright headers.
1783 // Revision 1.2 1997/05/23 00:35:12 curt
1784 // Trying to get fog to work ...
1786 // Revision 1.1 1997/05/21 15:57:51 curt
1787 // Renamed due to added GLUT support.
1789 // Revision 1.3 1997/05/19 18:22:42 curt
1790 // Parameter tweaking ... starting to stub in fog support.
1792 // Revision 1.2 1997/05/17 00:17:34 curt
1793 // Trying to stub in support for standard OpenGL.
1795 // Revision 1.1 1997/05/16 16:05:52 curt
1796 // Initial revision.