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)
42 #include <Include/fg_constants.h> // for VERSION
43 #include <Include/general.h>
45 #include <Aircraft/aircraft.h>
46 #include <Astro/moon.hxx>
47 #include <Astro/planets.hxx>
48 #include <Astro/sky.hxx>
49 #include <Astro/stars.hxx>
50 #include <Astro/sun.hxx>
51 #include <Cockpit/cockpit.hxx>
52 #include <Debug/fg_debug.h>
53 #include <Joystick/joystick.h>
54 #include <Math/fg_geodesy.h>
55 #include <Math/mat3.h>
56 #include <Math/polar.h>
57 #include <Scenery/scenery.h>
58 #include <Scenery/tilemgr.hxx>
59 #include <Time/event.hxx>
60 #include <Time/fg_time.hxx>
61 #include <Time/fg_timer.hxx>
62 #include <Time/sunpos.hxx>
63 #include <Weather/weather.h>
65 #include "GLUTkey.hxx"
66 #include "fg_init.hxx"
67 #include "options.hxx"
71 // This is a record containing global housekeeping information
75 static GLfloat win_ratio = 1.0;
76 static GLint winWidth, winHeight;
81 // Yet another other hack. Used for my prototype instrument code. (Durk)
82 int displayInstruments;
85 // The following defines flight gear options. Because glutlib will also
86 // want to parse its own options, those options must not be included here
87 // or they will get parsed by the main program option parser. Hence case
88 // is significant for any option added that might be in conflict with
91 // glutlib parses for:
93 // -direct (invalid in Win32)
97 // -indirect (invalid in Win32)
100 // Note that glutlib depends upon strings while this program's
101 // option parser wants only initial characters followed by numbers
104 const char *fg_cmdargopts = "a:c:Hhp:r:v:x:?";
107 // -a aircraftfilename aircraft start over ride
108 // -c0x0000 - 0xffffffff debug class setting
109 // H,h.? help on command line use (does not need Option struct)
111 // -r flightgear root path to program support files
112 // -v0 -v1 initial view mode (hud/no_hud currently)
113 // -xlogpathname debug logfile name
115 // Defaults in arguments to indicate not set on command line.
116 // Program defaults set variables from constants if neither command
117 // options or environmental variables effect values.
120 char acArgbuf [ MAXPATH + 1] = "\0";
121 int debugArgValue = -2;
122 int priorityArgValue = -1;
123 char rootArgbuf [ MAXPATH + 1] = "\0";
125 char logArgbuf [ MAXPATH + 1] = "\0";
127 // There is a reason for defining the option structs by name and then
128 // creating an array of pointers to options. C++ is unfriendly to
129 // initializing arrays of objects that are not built in types. Always
130 // look forward. (Besides, you can follow what is going on better and
131 // add or modify with greater security. -ch
133 Option aircraftOption = { 'a',
136 "Startup aircraft pathname override"
138 Option debugOption = { 'c',
139 OPT_LHEX, // Long int (32 bits)
143 Option priorityOption = { 'p',
146 "Debug priority Threshold"
148 Option rootOption = { 'r',
151 "Root directory for execution"
153 Option hudOption = { 'v',
156 "View mode start" // Naked,HUD,Panel,Chase,Tower...
159 // Only naked view and HUD are implemented at this time
160 Option logfileOption = { 'x',
163 "Debug log file name"
166 #define OptsDefined 6
167 Option *CmdLineOptions[ OptsDefined ] = {
176 const char *DefaultRootDir = "\\Flightgear";
177 const char *DefaultAircraft = "Navion.acf";
178 const char *DefaultDebuglog = "fgdebug.log";
179 const int DefaultViewMode = HUD_VIEW;
182 // Debug defaults handled in fg_debug.c
184 // fgInitVisuals() -- Initialize various GL/view parameters
185 static void fgInitVisuals( void ) {
189 l = &cur_light_params;
190 w = ¤t_weather;
192 // xglDisable( GL_DITHER );
194 // If enabled, normal vectors specified with glNormal are scaled
195 // to unit length after transformation. See glNormal.
196 xglEnable( GL_NORMALIZE );
198 xglEnable( GL_LIGHTING );
199 xglEnable( GL_LIGHT0 );
200 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
202 xglFogi (GL_FOG_MODE, GL_LINEAR);
203 xglFogf (GL_FOG_START, w->visibility / 1000000.0 );
204 xglFogf (GL_FOG_END, w->visibility);
205 // xglFogf (GL_FOG_DENSITY, w->visibility);
206 xglHint (GL_FOG_HINT, GL_NICEST /* GL_FASTEST */ );
209 // xglPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
213 // Update the view volume, position, and orientation
214 static void fgUpdateViewParams( void ) {
220 f = current_aircraft.flight;
221 l = &cur_light_params;
222 // t = &cur_time_params;
225 fgViewUpdate(f, v, l);
227 if (displayInstruments) {
228 xglViewport( 0, (GLint)(winHeight / 2 ) ,
229 (GLint)winWidth, (GLint)winHeight / 2 );
230 // Tell GL we are about to modify the projection parameters
231 xglMatrixMode(GL_PROJECTION);
233 gluPerspective(65.0, 2.0/win_ratio, 1.0, 100000.0);
235 xglViewport(0, 0 , (GLint)winWidth, (GLint) winHeight);
236 // Tell GL we are about to modify the projection parameters
237 xglMatrixMode(GL_PROJECTION);
239 gluPerspective(65.0, 1.0/win_ratio, 10.0, 100000.0);
242 xglMatrixMode(GL_MODELVIEW);
245 // set up our view volume (default)
246 gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
247 v->view_pos.x + v->view_forward[0],
248 v->view_pos.y + v->view_forward[1],
249 v->view_pos.z + v->view_forward[2],
250 v->view_up[0], v->view_up[1], v->view_up[2]);
252 // look almost straight up (testing and eclipse watching)
253 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
254 v->view_pos.x + v->view_up[0] + .001,
255 v->view_pos.y + v->view_up[1] + .001,
256 v->view_pos.z + v->view_up[2] + .001,
257 v->view_up[0], v->view_up[1], v->view_up[2]); */
259 // lock view horizontally towards sun (testing)
260 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
261 v->view_pos.x + v->surface_to_sun[0],
262 v->view_pos.y + v->surface_to_sun[1],
263 v->view_pos.z + v->surface_to_sun[2],
264 v->view_up[0], v->view_up[1], v->view_up[2]); */
266 // lock view horizontally towards south (testing)
267 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
268 v->view_pos.x + v->surface_south[0],
269 v->view_pos.y + v->surface_south[1],
270 v->view_pos.z + v->surface_south[2],
271 v->view_up[0], v->view_up[1], v->view_up[2]); */
273 // set the sun position
274 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
278 // Draw a basic instrument panel
279 static void fgUpdateInstrViewParams( void ) {
280 xglViewport(0, 0 , (GLint)winWidth, (GLint)winHeight / 2);
282 xglMatrixMode(GL_PROJECTION);
286 gluOrtho2D(0, 640, 0, 480);
287 xglMatrixMode(GL_MODELVIEW);
291 xglColor3f(1.0, 1.0, 1.0);
294 xglDisable(GL_DEPTH_TEST);
295 xglDisable(GL_LIGHTING);
298 xglColor3f (0.5, 0.5, 0.5);
301 xglVertex2f(0.0, 0.00);
302 xglVertex2f(0.0, 480.0);
303 xglVertex2f(640.0,480.0);
304 xglVertex2f(640.0, 0.0);
307 xglRectf(0.0,0.0, 640, 480);
308 xglEnable(GL_DEPTH_TEST);
309 xglEnable(GL_LIGHTING);
310 xglMatrixMode(GL_PROJECTION);
312 xglMatrixMode(GL_MODELVIEW);
317 // Update all Visuals (redraws anything graphics related)
318 static void fgRenderFrame( void ) {
324 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
326 l = &cur_light_params;
327 o = ¤t_options;
328 t = &cur_time_params;
331 // update view volume parameters
332 fgUpdateViewParams();
334 xglClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
336 // Tell GL we are switching to model view parameters
337 xglMatrixMode(GL_MODELVIEW);
338 // xglLoadIdentity();
341 xglDisable( GL_DEPTH_TEST );
342 xglDisable( GL_LIGHTING );
343 xglDisable( GL_CULL_FACE );
344 xglDisable( GL_FOG );
345 xglShadeModel( GL_SMOOTH );
348 // setup transformation for drawing astronomical objects
350 // Translate to view position
351 xglTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
352 // Rotate based on gst (sidereal time)
353 angle = t->gst * 15.041085; /* should be 15.041085, Curt thought it was 15*/
354 // printf("Rotating astro objects by %.2f degrees\n",angle);
355 xglRotatef( angle, 0.0, 0.0, -1.0 );
357 // draw stars and planets
365 xglEnable( GL_LIGHTING );
366 // set lighting parameters
367 xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
368 xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
369 xglEnable( GL_CULL_FACE );
371 // Let's try some blending technique's (Durk)
373 glBlendFunc(GL_ONE, GL_ONE);
380 xglShadeModel( /* GL_FLAT */ GL_SMOOTH );
381 xglEnable( GL_DEPTH_TEST );
383 xglFogfv (GL_FOG_COLOR, l->fog_color);
384 // set lighting parameters
385 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
386 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
387 // texture parameters
388 xglEnable( GL_TEXTURE_2D ); /* xglDisable( GL_TEXTURE_2D ); */
389 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ) ;
390 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT ) ;
391 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ) ;
392 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
393 GL_LINEAR /* GL_LINEAR_MIPMAP_LINEAR */ ) ;
394 xglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
395 xglHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
396 // set base color (I don't think this is doing anything here)
397 xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
398 xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
402 xglDisable( GL_TEXTURE_2D );
405 if( o->hud_status ) {
409 // display instruments
410 if (displayInstruments) {
411 fgUpdateInstrViewParams();
418 // Update internal time dependent calculations (i.e. flight model)
419 void fgUpdateTimeDepCalcs(int multi_loop) {
425 f = current_aircraft.flight;
426 t = &cur_time_params;
429 // update the flight model
430 if ( multi_loop < 0 ) {
431 multi_loop = DEFAULT_MULTILOOP;
434 // printf("updating flight model x %d\n", multi_loop);
435 fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
437 // update the view angle
438 for ( i = 0; i < multi_loop; i++ ) {
439 if ( fabs(v->goal_view_offset - v->view_offset) < 0.05 ) {
440 v->view_offset = v->goal_view_offset;
443 // move v->view_offset towards v->goal_view_offset
444 if ( v->goal_view_offset > v->view_offset ) {
445 if ( v->goal_view_offset - v->view_offset < FG_PI ) {
446 v->view_offset += 0.01;
448 v->view_offset -= 0.01;
451 if ( v->view_offset - v->goal_view_offset < FG_PI ) {
452 v->view_offset -= 0.01;
454 v->view_offset += 0.01;
457 if ( v->view_offset > FG_2PI ) {
458 v->view_offset -= FG_2PI;
459 } else if ( v->view_offset < 0 ) {
460 v->view_offset += FG_2PI;
467 void fgInitTimeDepCalcs( void ) {
470 #ifdef HAVE_SETITIMER
471 fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
472 #endif HAVE_SETITIMER
477 // What should we do when we have nothing else to do? Let's get ready
478 // for the next move and update the display?
479 static void fgMainLoop( void ) {
480 static int remainder = 0;
481 int elapsed, multi_loop;
483 // double joy_x, joy_y;
484 // int joy_b1, joy_b2;
489 fgPrintf( FG_ALL, FG_DEBUG, "Running Main Loop\n");
490 fgPrintf( FG_ALL, FG_DEBUG, "======= ==== ====\n");
492 a = ¤t_aircraft;
494 t = &cur_time_params;
500 /* fgJoystickRead( &joy_x, &joy_y, &joy_b1, &joy_b2 );
501 printf( "Joystick X %f Y %f B1 %d B2 %d\n",
502 joy_x, joy_y, joy_b1, joy_b2 );
504 fgAileronSet( joy_x ); */
506 // Calculate model iterations needed
507 elapsed = fgGetTimeInterval();
508 fgPrintf( FG_ALL, FG_BULK,
509 "Time interval is = %d, previous remainder is = %d\n",
511 fgPrintf( FG_ALL, FG_BULK,
512 "--> Frame rate is = %.2f\n", 1000.0 / (float)elapsed);
513 elapsed += remainder;
515 multi_loop = (int)(((float)elapsed * 0.001) * DEFAULT_MODEL_HZ);
516 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
517 fgPrintf( FG_ALL, FG_BULK,
518 "Model iterations needed = %d, new remainder = %d\n",
519 multi_loop, remainder);
522 if ( ! use_signals ) {
524 fgUpdateTimeDepCalcs(multi_loop);
527 // I'm just sticking this here for now, it should probably move
529 /* cur_elev = mesh_altitude(FG_Longitude * RAD_TO_ARCSEC,
530 FG_Latitude * RAD_TO_ARCSEC); */
531 // there is no ground collision detection really, so for now I
532 // just hard code the ground elevation to be 0 */
535 // printf("Ground elevation is %.2f meters here.\n", cur_elev);
536 // FG_Runway_altitude = cur_elev * METER_TO_FEET;
538 if ( FG_Altitude * FEET_TO_METER < cur_elev + 3.758099) {
539 // set this here, otherwise if we set runway height above our
540 // current height we get a really nasty bounce.
541 FG_Runway_altitude = FG_Altitude - 3.758099;
543 // now set aircraft altitude above ground
544 FG_Altitude = cur_elev * METER_TO_FEET + 3.758099;
545 fgPrintf( FG_ALL, FG_BULK, "<*> resetting altitude to %.0f meters\n",
546 FG_Altitude * FEET_TO_METER);
549 fgAircraftOutputCurrent(a);
551 // see if we need to load any new scenery tiles
554 // Process/manage pending events
560 fgPrintf( FG_ALL, FG_DEBUG, "\n");
564 // Handle new window size or exposure
565 static void fgReshape( int width, int height ) {
566 // Do this so we can call fgReshape(0,0) ourselves without having
567 // to know what the values of width & height are.
568 if ( (height > 0) && (width > 0) ) {
569 win_ratio = (GLfloat) height / (GLfloat) width;
575 // Inform gl of our view window size (now handled elsewhere)
576 // xglViewport(0, 0, (GLint)width, (GLint)height);
577 fgUpdateViewParams();
579 // xglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
583 // Initialize GLUT and define a main window
584 int fgGlutInit( int argc, char **argv ) {
585 // GLUT will extract all glut specific options so later on we only
586 // need wory about our own.
587 xglutInit(&argc, argv);
589 // Define Display Parameters
590 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
592 // Define initial window size
593 xglutInitWindowSize(640, 480);
595 // Initialize windows
596 xglutCreateWindow("Flight Gear");
602 // Initialize GLUT event handlers
603 int fgGlutInitEvents( void ) {
604 // call fgReshape() on window resizes
605 xglutReshapeFunc( fgReshape );
607 // call GLUTkey() on keyboard event
608 xglutKeyboardFunc( GLUTkey );
609 glutSpecialFunc( GLUTspecialkey );
611 // call fgMainLoop() whenever there is
612 // nothing else to do
613 xglutIdleFunc( fgMainLoop );
616 xglutDisplayFunc( fgRenderFrame );
623 int main( int argc, char **argv ) {
625 int result; // Used in command line argument.
627 f = current_aircraft.flight;
629 // Initialize the debugging output system
632 fgPrintf(FG_GENERAL, FG_INFO, "Flight Gear: Version %s\n\n", VERSION);
634 // Initialize the Window/Graphics environment.
635 if( !fgGlutInit(argc, argv) ) {
636 fgPrintf( FG_GENERAL, FG_EXIT, "GLUT initialization failed ...\n" );
639 // Parse remaining command line options
640 result = current_options.parse(argc, argv);
642 if ( result != FG_OPTIONS_OK ) {
643 // Something must have gone horribly wrong with the command
644 // line parsing or maybe the user just requested help ... :-)
645 current_options.usage();
646 fgPrintf( FG_GENERAL, FG_EXIT, "\nShutting down ...\n");
649 // These are a few miscellaneous things that aren't really
650 // "subsystems" but still need to be initialized.
651 if( !fgInitGeneral()) {
652 fgPrintf( FG_GENERAL, FG_EXIT, "General initializations failed ...\n" );
655 // This is the top level init routine which calls all the other
656 // subsystem initialization routines. If you are adding a
657 // subsystem to flight gear, its initialization call should
658 // located in this routine.
659 if( !fgInitSubsystems()) {
660 fgPrintf( FG_GENERAL, FG_EXIT,
661 "Subsystem initializations failed ...\n" );
664 // setup OpenGL view parameters
668 // init timer routines, signals, etc. Arrange for an alarm
669 // signal to be generated, etc.
670 fgInitTimeDepCalcs();
673 // Initialize the various GLUT Event Handlers.
674 if( !fgGlutInitEvents() ) {
675 fgPrintf( FG_GENERAL, FG_EXIT,
676 "GLUT event handler initialization failed ...\n" );
679 // pass control off to the master GLUT event handler
682 // we never actually get here ... but just in case ... :-)
689 void __eprintf( void ) {
696 // Revision 1.5 1998/04/25 20:24:01 curt
697 // Cleaned up initialization sequence to eliminate interdependencies
698 // between sun position, lighting, and view position. This creates a
699 // valid single pass initialization path.
701 // Revision 1.4 1998/04/24 14:19:30 curt
704 // Revision 1.3 1998/04/24 00:49:18 curt
705 // Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
706 // Trying out some different option parsing code.
707 // Some code reorganization.
709 // Revision 1.2 1998/04/22 13:25:41 curt
710 // C++ - ifing the code.
711 // Starting a bit of reorganization of lighting code.
713 // Revision 1.1 1998/04/21 17:02:39 curt
714 // Prepairing for C++ integration.
716 // Revision 1.71 1998/04/18 04:11:26 curt
717 // Moved fg_debug to it's own library, added zlib support.
719 // Revision 1.70 1998/04/14 02:21:02 curt
720 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
721 // <jgoeke@voyager.net>
723 // Revision 1.69 1998/04/08 23:35:34 curt
724 // Tweaks to Gnu automake/autoconf system.
726 // Revision 1.68 1998/04/03 22:09:03 curt
727 // Converting to Gnu autoconf system.
729 // Revision 1.67 1998/03/23 21:24:37 curt
730 // Source code formating tweaks.
732 // Revision 1.66 1998/03/14 00:31:20 curt
733 // Beginning initial terrain texturing experiments.
735 // Revision 1.65 1998/03/09 22:45:57 curt
736 // Minor tweaks for building on sparc platform.
738 // Revision 1.64 1998/02/20 00:16:23 curt
739 // Thursday's tweaks.
741 // Revision 1.63 1998/02/16 16:17:39 curt
744 // Revision 1.62 1998/02/16 13:39:42 curt
745 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
746 // tiles to occasionally be missing.
748 // Revision 1.61 1998/02/12 21:59:46 curt
749 // Incorporated code changes contributed by Charlie Hotchkiss
750 // <chotchkiss@namg.us.anritsu.com>
752 // Revision 1.60 1998/02/11 02:50:40 curt
755 // Revision 1.59 1998/02/09 22:56:54 curt
756 // Removed "depend" files from cvs control. Other minor make tweaks.
758 // Revision 1.58 1998/02/09 15:07:49 curt
761 // Revision 1.57 1998/02/07 15:29:40 curt
762 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
763 // <chotchkiss@namg.us.anritsu.com>
765 // Revision 1.56 1998/02/03 23:20:23 curt
766 // Lots of little tweaks to fix various consistency problems discovered by
767 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
768 // passed arguments along to the real printf(). Also incorporated HUD changes
769 // by Michele America.
771 // Revision 1.55 1998/02/02 20:53:58 curt
772 // Incorporated Durk's changes.
774 // Revision 1.54 1998/01/31 00:43:10 curt
775 // Added MetroWorks patches from Carmen Volpe.
777 // Revision 1.53 1998/01/27 18:35:54 curt
780 // Revision 1.52 1998/01/27 00:47:56 curt
781 // Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
782 // system and commandline/config file processing code.
784 // Revision 1.51 1998/01/26 15:57:05 curt
785 // Tweaks for dynamic scenery development.
787 // Revision 1.50 1998/01/19 19:27:07 curt
788 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
789 // This should simplify things tremendously.
791 // Revision 1.49 1998/01/19 18:40:31 curt
792 // Tons of little changes to clean up the code and to remove fatal errors
793 // when building with the c++ compiler.
795 // Revision 1.48 1998/01/19 18:35:46 curt
796 // Minor tweaks and fixes for cygwin32.
798 // Revision 1.47 1998/01/13 00:23:08 curt
799 // Initial changes to support loading and management of scenery tiles. Note,
800 // there's still a fair amount of work left to be done.
802 // Revision 1.46 1998/01/08 02:22:06 curt
803 // Beginning to integrate Tile management subsystem.
805 // Revision 1.45 1998/01/07 03:18:55 curt
806 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
808 // Revision 1.44 1997/12/30 22:22:31 curt
809 // Further integration of event manager.
811 // Revision 1.43 1997/12/30 20:47:43 curt
812 // Integrated new event manager with subsystem initializations.
814 // Revision 1.42 1997/12/30 16:36:47 curt
815 // Merged in Durk's changes ...
817 // Revision 1.41 1997/12/30 13:06:56 curt
818 // A couple lighting tweaks ...
820 // Revision 1.40 1997/12/30 01:38:37 curt
821 // Switched back to per vertex normals and smooth shading for terrain.
823 // Revision 1.39 1997/12/22 23:45:45 curt
824 // First stab at sunset/sunrise sky glow effects.
826 // Revision 1.38 1997/12/22 04:14:28 curt
827 // Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
829 // Revision 1.37 1997/12/19 23:34:03 curt
830 // Lot's of tweaking with sky rendering and lighting.
832 // Revision 1.36 1997/12/19 16:44:57 curt
833 // Working on scene rendering order and options.
835 // Revision 1.35 1997/12/18 23:32:32 curt
836 // First stab at sky dome actually starting to look reasonable. :-)
838 // Revision 1.34 1997/12/17 23:13:34 curt
839 // Began working on rendering a sky.
841 // Revision 1.33 1997/12/15 23:54:45 curt
842 // Add xgl wrappers for debugging.
843 // Generate terrain normals on the fly.
845 // Revision 1.32 1997/12/15 20:59:08 curt
848 // Revision 1.31 1997/12/12 21:41:25 curt
849 // More light/material property tweaking ... still a ways off.
851 // Revision 1.30 1997/12/12 19:52:47 curt
852 // Working on lightling and material properties.
854 // Revision 1.29 1997/12/11 04:43:54 curt
855 // Fixed sun vector and lighting problems. I thing the moon is now lit
858 // Revision 1.28 1997/12/10 22:37:45 curt
859 // Prepended "fg" on the name of all global structures that didn't have it yet.
860 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
862 // Revision 1.27 1997/12/09 05:11:54 curt
863 // Working on tweaking lighting.
865 // Revision 1.26 1997/12/09 04:25:29 curt
866 // Working on adding a global lighting params structure.
868 // Revision 1.25 1997/12/08 22:54:09 curt
869 // Enabled GL_CULL_FACE.
871 // Revision 1.24 1997/11/25 19:25:32 curt
872 // Changes to integrate Durk's moon/sun code updates + clean up.
874 // Revision 1.23 1997/11/15 18:16:34 curt
877 // Revision 1.22 1997/10/30 12:38:41 curt
878 // Working on new scenery subsystem.
880 // Revision 1.21 1997/09/23 00:29:38 curt
881 // Tweaks to get things to compile with gcc-win32.
883 // Revision 1.20 1997/09/22 14:44:19 curt
884 // Continuing to try to align stars correctly.
886 // Revision 1.19 1997/09/18 16:20:08 curt
887 // At dusk/dawn add/remove stars in stages.
889 // Revision 1.18 1997/09/16 22:14:51 curt
890 // Tweaked time of day lighting equations. Don't draw stars during the day.
892 // Revision 1.17 1997/09/16 15:50:29 curt
893 // Working on star alignment and time issues.
895 // Revision 1.16 1997/09/13 02:00:06 curt
896 // Mostly working on stars and generating sidereal time for accurate star
899 // Revision 1.15 1997/09/05 14:17:27 curt
900 // More tweaking with stars.
902 // Revision 1.14 1997/09/05 01:35:53 curt
903 // Working on getting stars right.
905 // Revision 1.13 1997/09/04 02:17:34 curt
908 // Revision 1.12 1997/08/27 21:32:24 curt
909 // Restructured view calculation code. Added stars.
911 // Revision 1.11 1997/08/27 03:30:16 curt
912 // Changed naming scheme of basic shared structures.
914 // Revision 1.10 1997/08/25 20:27:22 curt
915 // Merged in initial HUD and Joystick code.
917 // Revision 1.9 1997/08/22 21:34:39 curt
918 // Doing a bit of reorganizing and house cleaning.
920 // Revision 1.8 1997/08/19 23:55:03 curt
921 // Worked on better simulating real lighting.
923 // Revision 1.7 1997/08/16 12:22:38 curt
924 // Working on improving the lighting/shading.
926 // Revision 1.6 1997/08/13 20:24:56 curt
927 // Changes due to changing sunpos interface.
929 // Revision 1.5 1997/08/06 21:08:32 curt
930 // Sun position now really* works (I think) ... I still have sun time warping
931 // code in place, probably should remove it soon.
933 // Revision 1.4 1997/08/06 15:41:26 curt
934 // Working on correct sun position.
936 // Revision 1.3 1997/08/06 00:24:22 curt
937 // Working on correct real time sun lighting.
939 // Revision 1.2 1997/08/04 20:25:15 curt
940 // Organizational tweaking.
942 // Revision 1.1 1997/08/02 18:45:00 curt
943 // Renamed GLmain.c GLUTmain.c
945 // Revision 1.43 1997/08/02 16:23:47 curt
948 // Revision 1.42 1997/08/01 19:43:33 curt
949 // Making progress with coordinate system overhaul.
951 // Revision 1.41 1997/07/31 22:52:37 curt
952 // Working on redoing internal coordinate systems & scenery transformations.
954 // Revision 1.40 1997/07/30 16:12:42 curt
955 // Moved fg_random routines from Util/ to Math/
957 // Revision 1.39 1997/07/21 14:45:01 curt
960 // Revision 1.38 1997/07/19 23:04:47 curt
961 // Added an initial weather section.
963 // Revision 1.37 1997/07/19 22:34:02 curt
964 // Moved PI definitions to ../constants.h
965 // Moved random() stuff to ../Utils/ and renamed fg_random()
967 // Revision 1.36 1997/07/18 23:41:25 curt
968 // Tweaks for building with Cygnus Win32 compiler.
970 // Revision 1.35 1997/07/18 14:28:34 curt
971 // Hacked in some support for wind/turbulence.
973 // Revision 1.34 1997/07/16 20:04:48 curt
974 // Minor tweaks to aid Win32 port.
976 // Revision 1.33 1997/07/12 03:50:20 curt
977 // Added an #include <Windows32/Base.h> to help compiling for Win32
979 // Revision 1.32 1997/07/11 03:23:18 curt
980 // Solved some scenery display/orientation problems. Still have a positioning
981 // (or transformation?) problem.
983 // Revision 1.31 1997/07/11 01:29:58 curt
984 // More tweaking of terrian floor.
986 // Revision 1.30 1997/07/10 04:26:37 curt
987 // We now can interpolated ground elevation for any position in the grid. We
988 // can use this to enforce a "hard" ground. We still need to enforce some
989 // bounds checking so that we don't try to lookup data points outside the
992 // Revision 1.29 1997/07/09 21:31:12 curt
993 // Working on making the ground "hard."
995 // Revision 1.28 1997/07/08 18:20:12 curt
996 // Working on establishing a hard ground.
998 // Revision 1.27 1997/07/07 20:59:49 curt
999 // Working on scenery transformations to enable us to fly fluidly over the
1000 // poles with no discontinuity/distortion in scenery.
1002 // Revision 1.26 1997/07/05 20:43:34 curt
1003 // renamed mat3 directory to Math so we could add other math related routines.
1005 // Revision 1.25 1997/06/29 21:19:17 curt
1006 // Working on scenery management system.
1008 // Revision 1.24 1997/06/26 22:14:53 curt
1009 // Beginning work on a scenery management system.
1011 // Revision 1.23 1997/06/26 19:08:33 curt
1012 // Restructuring make, adding automatic "make dep" support.
1014 // Revision 1.22 1997/06/25 15:39:47 curt
1015 // Minor changes to compile with rsxnt/win32.
1017 // Revision 1.21 1997/06/22 21:44:41 curt
1018 // Working on intergrating the VRML (subset) parser.
1020 // Revision 1.20 1997/06/21 17:12:53 curt
1021 // Capitalized subdirectory names.
1023 // Revision 1.19 1997/06/18 04:10:31 curt
1024 // A couple more runway tweaks ...
1026 // Revision 1.18 1997/06/18 02:21:24 curt
1027 // Hacked in a runway
1029 // Revision 1.17 1997/06/17 16:51:58 curt
1030 // Timer interval stuff now uses gettimeofday() instead of ftime()
1032 // Revision 1.16 1997/06/17 04:19:16 curt
1033 // More timer related tweaks with respect to view direction changes.
1035 // Revision 1.15 1997/06/17 03:41:10 curt
1036 // Nonsignal based interval timing is now working.
1037 // This would be a good time to look at cleaning up the code structure a bit.
1039 // Revision 1.14 1997/06/16 19:32:51 curt
1040 // Starting to add general timer support.
1042 // Revision 1.13 1997/06/02 03:40:06 curt
1043 // A tiny bit more view tweaking.
1045 // Revision 1.12 1997/06/02 03:01:38 curt
1046 // Working on views (side, front, back, transitions, etc.)
1048 // Revision 1.11 1997/05/31 19:16:25 curt
1049 // Elevator trim added.
1051 // Revision 1.10 1997/05/31 04:13:52 curt
1052 // WE CAN NOW FLY!!!
1054 // Continuing work on the LaRCsim flight model integration.
1055 // Added some MSFS-like keyboard input handling.
1057 // Revision 1.9 1997/05/30 19:27:01 curt
1058 // The LaRCsim flight model is starting to look like it is working.
1060 // Revision 1.8 1997/05/30 03:54:10 curt
1061 // Made a bit more progress towards integrating the LaRCsim flight model.
1063 // Revision 1.7 1997/05/29 22:39:49 curt
1064 // Working on incorporating the LaRCsim flight model.
1066 // Revision 1.6 1997/05/29 12:31:39 curt
1067 // Minor tweaks, moving towards general flight model integration.
1069 // Revision 1.5 1997/05/29 02:33:23 curt
1070 // Updated to reflect changing interfaces in other "modules."
1072 // Revision 1.4 1997/05/27 17:44:31 curt
1073 // Renamed & rearranged variables and routines. Added some initial simple
1074 // timer/alarm routines so the flight model can be updated on a regular
1077 // Revision 1.3 1997/05/23 15:40:25 curt
1078 // Added GNU copyright headers.
1081 // Revision 1.2 1997/05/23 00:35:12 curt
1082 // Trying to get fog to work ...
1084 // Revision 1.1 1997/05/21 15:57:51 curt
1085 // Renamed due to added GLUT support.
1087 // Revision 1.3 1997/05/19 18:22:42 curt
1088 // Parameter tweaking ... starting to stub in fog support.
1090 // Revision 1.2 1997/05/17 00:17:34 curt
1091 // Trying to stub in support for standard OpenGL.
1093 // Revision 1.1 1997/05/16 16:05:52 curt
1094 // Initial revision.