2 // GLUTmain.cxx -- top level sim routines
4 // Written by Curtis Olson for OpenGL, started May 1997.
6 // Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
8 // This program is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU General Public License as
10 // published by the Free Software Foundation; either version 2 of the
11 // License, or (at your option) any later version.
13 // This program is distributed in the hope that it will be useful, but
14 // WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 // (Log is kept at end of this file)
44 #include <Include/fg_constants.h> // for VERSION
45 #include <Include/general.h>
47 #include <Aircraft/aircraft.h>
48 #include <Astro/moon.hxx>
49 #include <Astro/planets.hxx>
50 #include <Astro/sky.hxx>
51 #include <Astro/stars.hxx>
52 #include <Astro/sun.hxx>
55 # include <Audio/sl.h>
56 # include <Audio/sm.h>
59 #include <Cockpit/cockpit.hxx>
60 #include <Debug/fg_debug.h>
61 #include <Joystick/joystick.h>
62 #include <Math/fg_geodesy.h>
63 #include <Math/mat3.h>
64 #include <Math/polar3d.h>
65 #include <Scenery/scenery.hxx>
66 #include <Scenery/tilemgr.hxx>
67 #include <Time/event.hxx>
68 #include <Time/fg_time.hxx>
69 #include <Time/fg_timer.hxx>
70 #include <Time/sunpos.hxx>
71 #include <Weather/weather.h>
73 #include "GLUTkey.hxx"
74 #include "fg_init.hxx"
75 #include "options.hxx"
79 // This is a record containing global housekeeping information
85 // Yet another other hack. Used for my prototype instrument code. (Durk)
86 int displayInstruments;
88 // Global structures for the Audio library
90 slScheduler audio_sched ( 8000 ) ;
97 // The following defines flight gear options. Because glutlib will also
98 // want to parse its own options, those options must not be included here
99 // or they will get parsed by the main program option parser. Hence case
100 // is significant for any option added that might be in conflict with
103 // glutlib parses for:
105 // -direct (invalid in Win32)
109 // -indirect (invalid in Win32)
112 // Note that glutlib depends upon strings while this program's
113 // option parser wants only initial characters followed by numbers
118 // fgInitVisuals() -- Initialize various GL/view parameters
119 static void fgInitVisuals( void ) {
124 l = &cur_light_params;
125 o = ¤t_options;
126 w = ¤t_weather;
128 // Go full screen if requested ...
129 if ( o->fullscreen ) {
133 // If enabled, normal vectors specified with glNormal are scaled
134 // to unit length after transformation. See glNormal.
135 xglEnable( GL_NORMALIZE );
137 xglEnable( GL_LIGHTING );
138 xglEnable( GL_LIGHT0 );
139 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
141 xglFogi (GL_FOG_MODE, GL_LINEAR);
142 xglFogf (GL_FOG_START, w->visibility / 1000000.0 );
143 xglFogf (GL_FOG_END, w->visibility);
144 // xglFogf (GL_FOG_DENSITY, w->visibility);
146 xglHint (GL_FOG_HINT, GL_NICEST );
148 xglHint (GL_FOG_HINT, GL_FASTEST );
150 if ( o->wireframe ) {
152 xglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
155 // This is the default anyways, but it can't hurt
156 xglFrontFace ( GL_CCW );
160 // Update the view volume, position, and orientation
161 static void fgUpdateViewParams( void ) {
167 f = current_aircraft.flight;
168 l = &cur_light_params;
169 o = ¤t_options;
173 v->UpdateWorldToEye(f);
175 if (displayInstruments) {
176 xglViewport( 0, (GLint)((v->winHeight) / 2 ) ,
177 (GLint)(v->winWidth), (GLint)(v->winHeight) / 2 );
178 // Tell GL we are about to modify the projection parameters
179 xglMatrixMode(GL_PROJECTION);
181 gluPerspective(o->fov, v->win_ratio / 2.0, 1.0, 100000.0);
183 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) );
184 // Tell GL we are about to modify the projection parameters
185 xglMatrixMode(GL_PROJECTION);
187 gluPerspective(o->fov, v->win_ratio, 10.0, 100000.0);
190 xglMatrixMode(GL_MODELVIEW);
193 // set up our view volume (default)
194 gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
195 v->view_pos.x + v->view_forward[0],
196 v->view_pos.y + v->view_forward[1],
197 v->view_pos.z + v->view_forward[2],
198 v->view_up[0], v->view_up[1], v->view_up[2]);
200 // look almost straight up (testing and eclipse watching)
201 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
202 v->view_pos.x + v->view_up[0] + .001,
203 v->view_pos.y + v->view_up[1] + .001,
204 v->view_pos.z + v->view_up[2] + .001,
205 v->view_up[0], v->view_up[1], v->view_up[2]); */
207 // lock view horizontally towards sun (testing)
208 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
209 v->view_pos.x + v->surface_to_sun[0],
210 v->view_pos.y + v->surface_to_sun[1],
211 v->view_pos.z + v->surface_to_sun[2],
212 v->view_up[0], v->view_up[1], v->view_up[2]); */
214 // lock view horizontally towards south (testing)
215 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
216 v->view_pos.x + v->surface_south[0],
217 v->view_pos.y + v->surface_south[1],
218 v->view_pos.z + v->surface_south[2],
219 v->view_up[0], v->view_up[1], v->view_up[2]); */
221 // set the sun position
222 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
226 // Draw a basic instrument panel
227 static void fgUpdateInstrViewParams( void ) {
232 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) / 2);
234 xglMatrixMode(GL_PROJECTION);
238 gluOrtho2D(0, 640, 0, 480);
239 xglMatrixMode(GL_MODELVIEW);
243 xglColor3f(1.0, 1.0, 1.0);
246 xglDisable(GL_DEPTH_TEST);
247 xglDisable(GL_LIGHTING);
250 xglColor3f (0.5, 0.5, 0.5);
253 xglVertex2f(0.0, 0.00);
254 xglVertex2f(0.0, 480.0);
255 xglVertex2f(640.0,480.0);
256 xglVertex2f(640.0, 0.0);
259 xglRectf(0.0,0.0, 640, 480);
260 xglEnable(GL_DEPTH_TEST);
261 xglEnable(GL_LIGHTING);
262 xglMatrixMode(GL_PROJECTION);
264 xglMatrixMode(GL_MODELVIEW);
269 // Update all Visuals (redraws anything graphics related)
270 static void fgRenderFrame( void ) {
276 GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
277 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
278 GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
280 l = &cur_light_params;
281 o = ¤t_options;
282 t = &cur_time_params;
285 // update view volume parameters
286 fgUpdateViewParams();
289 glClearColor(black[0], black[1], black[2], black[3]);
290 xglClear( GL_DEPTH_BUFFER_BIT );
292 glClearColor(l->sky_color[0], l->sky_color[1],
293 l->sky_color[2], l->sky_color[3]);
294 xglClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
297 // Tell GL we are switching to model view parameters
298 xglMatrixMode(GL_MODELVIEW);
299 // xglLoadIdentity();
302 xglDisable( GL_DEPTH_TEST );
303 xglDisable( GL_LIGHTING );
304 xglDisable( GL_CULL_FACE );
305 xglDisable( GL_FOG );
306 xglShadeModel( GL_SMOOTH );
311 // setup transformation for drawing astronomical objects
313 // Translate to view position
314 xglTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
315 // Rotate based on gst (sidereal time)
316 angle = t->gst * 15.041085; /* should be 15.041085, Curt thought it was 15*/
317 // printf("Rotating astro objects by %.2f degrees\n",angle);
318 xglRotatef( angle, 0.0, 0.0, -1.0 );
320 // draw stars and planets
328 xglEnable( GL_LIGHTING );
329 // set lighting parameters
330 xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
331 xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
332 xglEnable( GL_CULL_FACE );
334 // Let's try some blending technique's (Durk)
336 glBlendFunc(GL_ONE, GL_ONE);
344 xglShadeModel( GL_SMOOTH );
346 xglShadeModel( GL_FLAT );
348 xglEnable( GL_DEPTH_TEST );
351 xglFogfv (GL_FOG_COLOR, l->fog_color);
353 // set lighting parameters
354 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
355 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
358 // texture parameters
359 xglEnable( GL_TEXTURE_2D );
360 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ) ;
361 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT ) ;
362 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ) ;
363 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
364 GL_LINEAR /* GL_LINEAR_MIPMAP_LINEAR */ ) ;
365 xglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
366 xglHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
367 // set base color (I don't think this is doing anything here)
368 xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
369 xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
371 xglDisable( GL_TEXTURE_2D );
372 xglMaterialfv (GL_FRONT, GL_AMBIENT, terrain_color);
373 xglMaterialfv (GL_FRONT, GL_DIFFUSE, terrain_color);
374 // xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
375 // xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
380 xglDisable( GL_TEXTURE_2D );
383 if( o->hud_status ) {
387 // display instruments
388 if (displayInstruments) {
389 fgUpdateInstrViewParams();
396 // Update internal time dependent calculations (i.e. flight model)
397 void fgUpdateTimeDepCalcs(int multi_loop) {
403 f = current_aircraft.flight;
404 t = &cur_time_params;
407 // update the flight model
408 if ( multi_loop < 0 ) {
409 multi_loop = DEFAULT_MULTILOOP;
412 // printf("updating flight model x %d\n", multi_loop);
413 fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
415 // update the view angle
416 for ( i = 0; i < multi_loop; i++ ) {
417 if ( fabs(v->goal_view_offset - v->view_offset) < 0.05 ) {
418 v->view_offset = v->goal_view_offset;
421 // move v->view_offset towards v->goal_view_offset
422 if ( v->goal_view_offset > v->view_offset ) {
423 if ( v->goal_view_offset - v->view_offset < FG_PI ) {
424 v->view_offset += 0.01;
426 v->view_offset -= 0.01;
429 if ( v->view_offset - v->goal_view_offset < FG_PI ) {
430 v->view_offset -= 0.01;
432 v->view_offset += 0.01;
435 if ( v->view_offset > FG_2PI ) {
436 v->view_offset -= FG_2PI;
437 } else if ( v->view_offset < 0 ) {
438 v->view_offset += FG_2PI;
445 void fgInitTimeDepCalcs( void ) {
448 #ifdef HAVE_SETITIMER
449 fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
450 #endif HAVE_SETITIMER
455 // What should we do when we have nothing else to do? Let's get ready
456 // for the next move and update the display?
457 static void fgMainLoop( void ) {
462 static int remainder = 0;
463 int elapsed, multi_loop;
467 // double joy_x, joy_y;
468 // int joy_b1, joy_b2;
470 a = ¤t_aircraft;
473 t = &cur_time_params;
475 fgPrintf( FG_ALL, FG_DEBUG, "Running Main Loop\n");
476 fgPrintf( FG_ALL, FG_DEBUG, "======= ==== ====\n");
482 /* fgJoystickRead( &joy_x, &joy_y, &joy_b1, &joy_b2 );
483 printf( "Joystick X %f Y %f B1 %d B2 %d\n",
484 joy_x, joy_y, joy_b1, joy_b2 );
486 fgAileronSet( joy_x ); */
488 // Get elapsed time for this past frame
489 elapsed = fgGetTimeInterval();
490 fgPrintf( FG_ALL, FG_BULK,
491 "Time interval is = %d, previous remainder is = %d\n",
494 // Calculate frame rate average
495 if ( elapsed > 0.0 ) {
497 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
498 accum += g->frames[i];
499 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
500 g->frames[i+1] = g->frames[i];
502 g->frames[0] = 1000.0 / (float)elapsed;
503 // printf("frame[0] = %.2f\n", g->frames[0]);
504 accum += g->frames[0];
505 g->frame_rate = accum / (float)FG_FRAME_RATE_HISTORY;
506 // printf("ave = %.2f\n", g->frame_rate);
509 // Calculate model iterations needed for next frame
510 fgPrintf( FG_ALL, FG_DEBUG,
511 "--> Frame rate is = %.2f\n", g->frame_rate);
512 elapsed += remainder;
514 multi_loop = (int)(((float)elapsed * 0.001) * DEFAULT_MODEL_HZ);
515 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
516 fgPrintf( FG_ALL, FG_BULK,
517 "Model iterations needed = %d, new remainder = %d\n",
518 multi_loop, remainder);
521 if ( ! use_signals ) {
523 fgUpdateTimeDepCalcs(multi_loop);
526 // I'm just sticking this here for now, it should probably move
528 /* cur_elev = mesh_altitude(FG_Longitude * RAD_TO_ARCSEC,
529 FG_Latitude * RAD_TO_ARCSEC); */
530 // there is no ground collision detection really, so for now I
531 // just hard code the ground elevation to be 0 */
534 // printf("Ground elevation is %.2f meters here.\n", cur_elev);
535 // FG_Runway_altitude = cur_elev * METER_TO_FEET;
537 if ( FG_Altitude * FEET_TO_METER < cur_elev + 3.758099) {
538 // set this here, otherwise if we set runway height above our
539 // current height we get a really nasty bounce.
540 FG_Runway_altitude = FG_Altitude - 3.758099;
542 // now set aircraft altitude above ground
543 FG_Altitude = cur_elev * METER_TO_FEET + 3.758099;
544 fgPrintf( FG_ALL, FG_BULK, "<*> resetting altitude to %.0f meters\n",
545 FG_Altitude * FEET_TO_METER);
548 fgAircraftOutputCurrent(a);
550 // see if we need to load any new scenery tiles
553 // Process/manage pending events
554 global_events.Process();
556 // Run audio scheduler
557 #ifdef HAVE_OSS_AUDIO
558 audio_sched.update();
564 fgPrintf( FG_ALL, FG_DEBUG, "\n");
568 // Handle new window size or exposure
569 static void fgReshape( int width, int height ) {
574 // Do this so we can call fgReshape(0,0) ourselves without having
575 // to know what the values of width & height are.
576 if ( (height > 0) && (width > 0) ) {
577 v->win_ratio = (GLfloat) width / (GLfloat) height;
581 v->winHeight = height;
583 // Inform gl of our view window size (now handled elsewhere)
584 // xglViewport(0, 0, (GLint)width, (GLint)height);
585 fgUpdateViewParams();
587 // xglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
591 // Initialize GLUT and define a main window
592 int fgGlutInit( int *argc, char **argv ) {
593 // GLUT will extract all glut specific options so later on we only
594 // need wory about our own.
595 xglutInit(argc, argv);
597 // Define Display Parameters
598 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
600 // Define initial window size
601 xglutInitWindowSize(640, 480);
603 // Initialize windows
604 xglutCreateWindow("Flight Gear");
610 // Initialize GLUT event handlers
611 int fgGlutInitEvents( void ) {
612 // call fgReshape() on window resizes
613 xglutReshapeFunc( fgReshape );
615 // call GLUTkey() on keyboard event
616 xglutKeyboardFunc( GLUTkey );
617 glutSpecialFunc( GLUTspecialkey );
619 // call fgMainLoop() whenever there is
620 // nothing else to do
621 xglutIdleFunc( fgMainLoop );
624 xglutDisplayFunc( fgRenderFrame );
631 int main( int argc, char **argv ) {
635 char path[256], slfile[256];
636 int result; // Used in command line argument.
638 f = current_aircraft.flight;
639 o = ¤t_options;
642 _control87(MCW_EM, MCW_EM); /* defined in float.h */
645 // Initialize the debugging output system
648 fgPrintf(FG_GENERAL, FG_INFO, "Flight Gear: Version %s\n\n", VERSION);
650 // Initialize the Window/Graphics environment.
651 if( !fgGlutInit(&argc, argv) ) {
652 fgPrintf( FG_GENERAL, FG_EXIT, "GLUT initialization failed ...\n" );
655 // Attempt to locate and parse a config file
656 // First check fg_root
657 strcpy(config, o->fg_root);
658 strcat(config, "/system.fgfsrc");
659 result = o->parse_config_file(config);
661 // Next check home directory
662 if ( getenv("HOME") != NULL ) {
663 strcpy(config, getenv("HOME"));
664 strcat(config, "/.fgfsrc");
665 result = o->parse_config_file(config);
668 // Parse remaining command line options
669 // These will override anything specified in a config file
670 result = o->parse_command_line(argc, argv);
671 if ( result != FG_OPTIONS_OK ) {
672 // Something must have gone horribly wrong with the command
673 // line parsing or maybe the user just requested help ... :-)
675 fgPrintf( FG_GENERAL, FG_EXIT, "\nExiting ...\n");
678 // These are a few miscellaneous things that aren't really
679 // "subsystems" but still need to be initialized.
680 if( !fgInitGeneral()) {
681 fgPrintf( FG_GENERAL, FG_EXIT, "General initializations failed ...\n" );
684 // This is the top level init routine which calls all the other
685 // subsystem initialization routines. If you are adding a
686 // subsystem to flight gear, its initialization call should
687 // located in this routine.
688 if( !fgInitSubsystems()) {
689 fgPrintf( FG_GENERAL, FG_EXIT,
690 "Subsystem initializations failed ...\n" );
693 // setup OpenGL view parameters
697 // init timer routines, signals, etc. Arrange for an alarm
698 // signal to be generated, etc.
699 fgInitTimeDepCalcs();
702 // Initialize the various GLUT Event Handlers.
703 if( !fgGlutInitEvents() ) {
704 fgPrintf( FG_GENERAL, FG_EXIT,
705 "GLUT event handler initialization failed ...\n" );
708 // Initialize audio support
709 #ifdef HAVE_OSS_AUDIO
710 audio_mixer . setMasterVolume ( 30 ) ; /* 50% of max volume. */
711 audio_sched . setSafetyMargin ( 1.0 ) ;
712 strcpy(path, o->fg_root);
713 strcat(path, "/Sounds/");
715 strcpy(slfile, path);
716 strcat(slfile, "prpidle.wav");
717 // s1 = new slSample ( slfile );
718 s1 = new slSample ( "/dos/X-System-HSR/sounds/xp_recip.wav", &audio_sched );
719 printf("Rate = %d Bps = %d Stereo = %d\n",
720 s1 -> getRate(), s1 -> getBps(), s1 -> getStereo());
721 audio_sched . loopSample ( s1 );
723 // strcpy(slfile, path);
724 // strcat(slfile, "thunder.wav");
725 // s2 -> loadFile ( slfile );
726 // s2 -> adjustVolume(0.5);
727 // audio_sched -> playSample ( s2 );
730 // pass control off to the master GLUT event handler
733 // we never actually get here ... but just in case ... :-)
739 // Revision 1.23 1998/06/08 17:57:04 curt
740 // Minor sound/startup position tweaks.
742 // Revision 1.22 1998/06/05 18:18:40 curt
743 // A bit of fiddling with audio ...
745 // Revision 1.21 1998/06/03 22:01:06 curt
746 // Tweaking sound library usage.
748 // Revision 1.20 1998/06/03 00:47:11 curt
749 // Updated to compile in audio support if OSS available.
750 // Updated for new version of Steve's audio library.
751 // STL includes don't use .h
752 // Small view optimizations.
754 // Revision 1.19 1998/06/01 17:54:40 curt
755 // Added Linux audio support.
756 // avoid glClear( COLOR_BUFFER_BIT ) when not using it to set the sky color.
759 // Revision 1.18 1998/05/29 20:37:19 curt
760 // Tweaked material properties & lighting a bit in GLUTmain.cxx.
761 // Read airport list into a "map" STL for dynamic list sizing and fast tree
764 // Revision 1.17 1998/05/22 21:28:52 curt
765 // Modifications to use the new fgEVENT_MGR class.
767 // Revision 1.16 1998/05/20 20:51:33 curt
768 // Tweaked smooth shaded texture lighting properties.
769 // Converted fgLIGHT to a C++ class.
771 // Revision 1.15 1998/05/16 13:08:34 curt
772 // C++ - ified views.[ch]xx
773 // Shuffled some additional view parameters into the fgVIEW class.
774 // Changed tile-radius to tile-diameter because it is a much better
776 // Added a WORLD_TO_EYE transformation to views.cxx. This allows us
777 // to transform world space to eye space for view frustum culling.
779 // Revision 1.14 1998/05/13 18:29:57 curt
780 // Added a keyboard binding to dynamically adjust field of view.
781 // Added a command line option to specify fov.
782 // Adjusted terrain color.
783 // Root path info moved to fgOPTIONS.
784 // Added ability to parse options out of a config file.
786 // Revision 1.13 1998/05/11 18:18:15 curt
787 // For flat shading use "glHint (GL_FOG_HINT, GL_FASTEST )"
789 // Revision 1.12 1998/05/07 23:14:15 curt
790 // Added "D" key binding to set autopilot heading.
791 // Made frame rate calculation average out over last 10 frames.
792 // Borland C++ floating point exception workaround.
793 // Added a --tile-radius=n option.
795 // Revision 1.11 1998/05/06 03:16:23 curt
796 // Added an averaged global frame rate counter.
797 // Added an option to control tile radius.
799 // Revision 1.10 1998/05/03 00:47:31 curt
800 // Added an option to enable/disable full-screen mode.
802 // Revision 1.9 1998/04/30 12:34:17 curt
803 // Added command line rendering options:
804 // enable/disable fog/haze
805 // specify smooth/flat shading
806 // disable sky blending and just use a solid color
807 // enable wireframe drawing mode
809 // Revision 1.8 1998/04/28 01:20:21 curt
810 // Type-ified fgTIME and fgVIEW.
811 // Added a command line option to disable textures.
813 // Revision 1.7 1998/04/26 05:10:02 curt
814 // "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
816 // Revision 1.6 1998/04/25 22:06:30 curt
817 // Edited cvs log messages in source files ... bad bad bad!
819 // Revision 1.5 1998/04/25 20:24:01 curt
820 // Cleaned up initialization sequence to eliminate interdependencies
821 // between sun position, lighting, and view position. This creates a
822 // valid single pass initialization path.
824 // Revision 1.4 1998/04/24 14:19:30 curt
827 // Revision 1.3 1998/04/24 00:49:18 curt
828 // Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
829 // Trying out some different option parsing code.
830 // Some code reorganization.
832 // Revision 1.2 1998/04/22 13:25:41 curt
833 // C++ - ifing the code.
834 // Starting a bit of reorganization of lighting code.
836 // Revision 1.1 1998/04/21 17:02:39 curt
837 // Prepairing for C++ integration.
839 // Revision 1.71 1998/04/18 04:11:26 curt
840 // Moved fg_debug to it's own library, added zlib support.
842 // Revision 1.70 1998/04/14 02:21:02 curt
843 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
844 // <jgoeke@voyager.net>
846 // Revision 1.69 1998/04/08 23:35:34 curt
847 // Tweaks to Gnu automake/autoconf system.
849 // Revision 1.68 1998/04/03 22:09:03 curt
850 // Converting to Gnu autoconf system.
852 // Revision 1.67 1998/03/23 21:24:37 curt
853 // Source code formating tweaks.
855 // Revision 1.66 1998/03/14 00:31:20 curt
856 // Beginning initial terrain texturing experiments.
858 // Revision 1.65 1998/03/09 22:45:57 curt
859 // Minor tweaks for building on sparc platform.
861 // Revision 1.64 1998/02/20 00:16:23 curt
862 // Thursday's tweaks.
864 // Revision 1.63 1998/02/16 16:17:39 curt
867 // Revision 1.62 1998/02/16 13:39:42 curt
868 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
869 // tiles to occasionally be missing.
871 // Revision 1.61 1998/02/12 21:59:46 curt
872 // Incorporated code changes contributed by Charlie Hotchkiss
873 // <chotchkiss@namg.us.anritsu.com>
875 // Revision 1.60 1998/02/11 02:50:40 curt
878 // Revision 1.59 1998/02/09 22:56:54 curt
879 // Removed "depend" files from cvs control. Other minor make tweaks.
881 // Revision 1.58 1998/02/09 15:07:49 curt
884 // Revision 1.57 1998/02/07 15:29:40 curt
885 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
886 // <chotchkiss@namg.us.anritsu.com>
888 // Revision 1.56 1998/02/03 23:20:23 curt
889 // Lots of little tweaks to fix various consistency problems discovered by
890 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
891 // passed arguments along to the real printf(). Also incorporated HUD changes
892 // by Michele America.
894 // Revision 1.55 1998/02/02 20:53:58 curt
895 // Incorporated Durk's changes.
897 // Revision 1.54 1998/01/31 00:43:10 curt
898 // Added MetroWorks patches from Carmen Volpe.
900 // Revision 1.53 1998/01/27 18:35:54 curt
903 // Revision 1.52 1998/01/27 00:47:56 curt
904 // Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
905 // system and commandline/config file processing code.
907 // Revision 1.51 1998/01/26 15:57:05 curt
908 // Tweaks for dynamic scenery development.
910 // Revision 1.50 1998/01/19 19:27:07 curt
911 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
912 // This should simplify things tremendously.
914 // Revision 1.49 1998/01/19 18:40:31 curt
915 // Tons of little changes to clean up the code and to remove fatal errors
916 // when building with the c++ compiler.
918 // Revision 1.48 1998/01/19 18:35:46 curt
919 // Minor tweaks and fixes for cygwin32.
921 // Revision 1.47 1998/01/13 00:23:08 curt
922 // Initial changes to support loading and management of scenery tiles. Note,
923 // there's still a fair amount of work left to be done.
925 // Revision 1.46 1998/01/08 02:22:06 curt
926 // Beginning to integrate Tile management subsystem.
928 // Revision 1.45 1998/01/07 03:18:55 curt
929 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
931 // Revision 1.44 1997/12/30 22:22:31 curt
932 // Further integration of event manager.
934 // Revision 1.43 1997/12/30 20:47:43 curt
935 // Integrated new event manager with subsystem initializations.
937 // Revision 1.42 1997/12/30 16:36:47 curt
938 // Merged in Durk's changes ...
940 // Revision 1.41 1997/12/30 13:06:56 curt
941 // A couple lighting tweaks ...
943 // Revision 1.40 1997/12/30 01:38:37 curt
944 // Switched back to per vertex normals and smooth shading for terrain.
946 // Revision 1.39 1997/12/22 23:45:45 curt
947 // First stab at sunset/sunrise sky glow effects.
949 // Revision 1.38 1997/12/22 04:14:28 curt
950 // Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
952 // Revision 1.37 1997/12/19 23:34:03 curt
953 // Lot's of tweaking with sky rendering and lighting.
955 // Revision 1.36 1997/12/19 16:44:57 curt
956 // Working on scene rendering order and options.
958 // Revision 1.35 1997/12/18 23:32:32 curt
959 // First stab at sky dome actually starting to look reasonable. :-)
961 // Revision 1.34 1997/12/17 23:13:34 curt
962 // Began working on rendering a sky.
964 // Revision 1.33 1997/12/15 23:54:45 curt
965 // Add xgl wrappers for debugging.
966 // Generate terrain normals on the fly.
968 // Revision 1.32 1997/12/15 20:59:08 curt
971 // Revision 1.31 1997/12/12 21:41:25 curt
972 // More light/material property tweaking ... still a ways off.
974 // Revision 1.30 1997/12/12 19:52:47 curt
975 // Working on lightling and material properties.
977 // Revision 1.29 1997/12/11 04:43:54 curt
978 // Fixed sun vector and lighting problems. I thing the moon is now lit
981 // Revision 1.28 1997/12/10 22:37:45 curt
982 // Prepended "fg" on the name of all global structures that didn't have it yet.
983 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
985 // Revision 1.27 1997/12/09 05:11:54 curt
986 // Working on tweaking lighting.
988 // Revision 1.26 1997/12/09 04:25:29 curt
989 // Working on adding a global lighting params structure.
991 // Revision 1.25 1997/12/08 22:54:09 curt
992 // Enabled GL_CULL_FACE.
994 // Revision 1.24 1997/11/25 19:25:32 curt
995 // Changes to integrate Durk's moon/sun code updates + clean up.
997 // Revision 1.23 1997/11/15 18:16:34 curt
1000 // Revision 1.22 1997/10/30 12:38:41 curt
1001 // Working on new scenery subsystem.
1003 // Revision 1.21 1997/09/23 00:29:38 curt
1004 // Tweaks to get things to compile with gcc-win32.
1006 // Revision 1.20 1997/09/22 14:44:19 curt
1007 // Continuing to try to align stars correctly.
1009 // Revision 1.19 1997/09/18 16:20:08 curt
1010 // At dusk/dawn add/remove stars in stages.
1012 // Revision 1.18 1997/09/16 22:14:51 curt
1013 // Tweaked time of day lighting equations. Don't draw stars during the day.
1015 // Revision 1.17 1997/09/16 15:50:29 curt
1016 // Working on star alignment and time issues.
1018 // Revision 1.16 1997/09/13 02:00:06 curt
1019 // Mostly working on stars and generating sidereal time for accurate star
1022 // Revision 1.15 1997/09/05 14:17:27 curt
1023 // More tweaking with stars.
1025 // Revision 1.14 1997/09/05 01:35:53 curt
1026 // Working on getting stars right.
1028 // Revision 1.13 1997/09/04 02:17:34 curt
1031 // Revision 1.12 1997/08/27 21:32:24 curt
1032 // Restructured view calculation code. Added stars.
1034 // Revision 1.11 1997/08/27 03:30:16 curt
1035 // Changed naming scheme of basic shared structures.
1037 // Revision 1.10 1997/08/25 20:27:22 curt
1038 // Merged in initial HUD and Joystick code.
1040 // Revision 1.9 1997/08/22 21:34:39 curt
1041 // Doing a bit of reorganizing and house cleaning.
1043 // Revision 1.8 1997/08/19 23:55:03 curt
1044 // Worked on better simulating real lighting.
1046 // Revision 1.7 1997/08/16 12:22:38 curt
1047 // Working on improving the lighting/shading.
1049 // Revision 1.6 1997/08/13 20:24:56 curt
1050 // Changes due to changing sunpos interface.
1052 // Revision 1.5 1997/08/06 21:08:32 curt
1053 // Sun position now really* works (I think) ... I still have sun time warping
1054 // code in place, probably should remove it soon.
1056 // Revision 1.4 1997/08/06 15:41:26 curt
1057 // Working on correct sun position.
1059 // Revision 1.3 1997/08/06 00:24:22 curt
1060 // Working on correct real time sun lighting.
1062 // Revision 1.2 1997/08/04 20:25:15 curt
1063 // Organizational tweaking.
1065 // Revision 1.1 1997/08/02 18:45:00 curt
1066 // Renamed GLmain.c GLUTmain.c
1068 // Revision 1.43 1997/08/02 16:23:47 curt
1071 // Revision 1.42 1997/08/01 19:43:33 curt
1072 // Making progress with coordinate system overhaul.
1074 // Revision 1.41 1997/07/31 22:52:37 curt
1075 // Working on redoing internal coordinate systems & scenery transformations.
1077 // Revision 1.40 1997/07/30 16:12:42 curt
1078 // Moved fg_random routines from Util/ to Math/
1080 // Revision 1.39 1997/07/21 14:45:01 curt
1083 // Revision 1.38 1997/07/19 23:04:47 curt
1084 // Added an initial weather section.
1086 // Revision 1.37 1997/07/19 22:34:02 curt
1087 // Moved PI definitions to ../constants.h
1088 // Moved random() stuff to ../Utils/ and renamed fg_random()
1090 // Revision 1.36 1997/07/18 23:41:25 curt
1091 // Tweaks for building with Cygnus Win32 compiler.
1093 // Revision 1.35 1997/07/18 14:28:34 curt
1094 // Hacked in some support for wind/turbulence.
1096 // Revision 1.34 1997/07/16 20:04:48 curt
1097 // Minor tweaks to aid Win32 port.
1099 // Revision 1.33 1997/07/12 03:50:20 curt
1100 // Added an #include <Windows32/Base.h> to help compiling for Win32
1102 // Revision 1.32 1997/07/11 03:23:18 curt
1103 // Solved some scenery display/orientation problems. Still have a positioning
1104 // (or transformation?) problem.
1106 // Revision 1.31 1997/07/11 01:29:58 curt
1107 // More tweaking of terrian floor.
1109 // Revision 1.30 1997/07/10 04:26:37 curt
1110 // We now can interpolated ground elevation for any position in the grid. We
1111 // can use this to enforce a "hard" ground. We still need to enforce some
1112 // bounds checking so that we don't try to lookup data points outside the
1115 // Revision 1.29 1997/07/09 21:31:12 curt
1116 // Working on making the ground "hard."
1118 // Revision 1.28 1997/07/08 18:20:12 curt
1119 // Working on establishing a hard ground.
1121 // Revision 1.27 1997/07/07 20:59:49 curt
1122 // Working on scenery transformations to enable us to fly fluidly over the
1123 // poles with no discontinuity/distortion in scenery.
1125 // Revision 1.26 1997/07/05 20:43:34 curt
1126 // renamed mat3 directory to Math so we could add other math related routines.
1128 // Revision 1.25 1997/06/29 21:19:17 curt
1129 // Working on scenery management system.
1131 // Revision 1.24 1997/06/26 22:14:53 curt
1132 // Beginning work on a scenery management system.
1134 // Revision 1.23 1997/06/26 19:08:33 curt
1135 // Restructuring make, adding automatic "make dep" support.
1137 // Revision 1.22 1997/06/25 15:39:47 curt
1138 // Minor changes to compile with rsxnt/win32.
1140 // Revision 1.21 1997/06/22 21:44:41 curt
1141 // Working on intergrating the VRML (subset) parser.
1143 // Revision 1.20 1997/06/21 17:12:53 curt
1144 // Capitalized subdirectory names.
1146 // Revision 1.19 1997/06/18 04:10:31 curt
1147 // A couple more runway tweaks ...
1149 // Revision 1.18 1997/06/18 02:21:24 curt
1150 // Hacked in a runway
1152 // Revision 1.17 1997/06/17 16:51:58 curt
1153 // Timer interval stuff now uses gettimeofday() instead of ftime()
1155 // Revision 1.16 1997/06/17 04:19:16 curt
1156 // More timer related tweaks with respect to view direction changes.
1158 // Revision 1.15 1997/06/17 03:41:10 curt
1159 // Nonsignal based interval timing is now working.
1160 // This would be a good time to look at cleaning up the code structure a bit.
1162 // Revision 1.14 1997/06/16 19:32:51 curt
1163 // Starting to add general timer support.
1165 // Revision 1.13 1997/06/02 03:40:06 curt
1166 // A tiny bit more view tweaking.
1168 // Revision 1.12 1997/06/02 03:01:38 curt
1169 // Working on views (side, front, back, transitions, etc.)
1171 // Revision 1.11 1997/05/31 19:16:25 curt
1172 // Elevator trim added.
1174 // Revision 1.10 1997/05/31 04:13:52 curt
1175 // WE CAN NOW FLY!!!
1177 // Continuing work on the LaRCsim flight model integration.
1178 // Added some MSFS-like keyboard input handling.
1180 // Revision 1.9 1997/05/30 19:27:01 curt
1181 // The LaRCsim flight model is starting to look like it is working.
1183 // Revision 1.8 1997/05/30 03:54:10 curt
1184 // Made a bit more progress towards integrating the LaRCsim flight model.
1186 // Revision 1.7 1997/05/29 22:39:49 curt
1187 // Working on incorporating the LaRCsim flight model.
1189 // Revision 1.6 1997/05/29 12:31:39 curt
1190 // Minor tweaks, moving towards general flight model integration.
1192 // Revision 1.5 1997/05/29 02:33:23 curt
1193 // Updated to reflect changing interfaces in other "modules."
1195 // Revision 1.4 1997/05/27 17:44:31 curt
1196 // Renamed & rearranged variables and routines. Added some initial simple
1197 // timer/alarm routines so the flight model can be updated on a regular
1200 // Revision 1.3 1997/05/23 15:40:25 curt
1201 // Added GNU copyright headers.
1204 // Revision 1.2 1997/05/23 00:35:12 curt
1205 // Trying to get fog to work ...
1207 // Revision 1.1 1997/05/21 15:57:51 curt
1208 // Renamed due to added GLUT support.
1210 // Revision 1.3 1997/05/19 18:22:42 curt
1211 // Parameter tweaking ... starting to stub in fog support.
1213 // Revision 1.2 1997/05/17 00:17:34 curt
1214 // Trying to stub in support for standard OpenGL.
1216 // Revision 1.1 1997/05/16 16:05:52 curt
1217 // Initial revision.