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 ) {
219 f = current_aircraft.flight;
220 l = &cur_light_params;
223 fgViewUpdate(f, v, l);
225 if (displayInstruments) {
226 xglViewport( 0, (GLint)(winHeight / 2 ) ,
227 (GLint)winWidth, (GLint)winHeight / 2 );
228 // Tell GL we are about to modify the projection parameters
229 xglMatrixMode(GL_PROJECTION);
231 gluPerspective(65.0, 2.0/win_ratio, 1.0, 100000.0);
233 xglViewport(0, 0 , (GLint)winWidth, (GLint) winHeight);
234 // Tell GL we are about to modify the projection parameters
235 xglMatrixMode(GL_PROJECTION);
237 gluPerspective(65.0, 1.0/win_ratio, 10.0, 100000.0);
240 xglMatrixMode(GL_MODELVIEW);
243 // set up our view volume (default)
244 gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
245 v->view_pos.x + v->view_forward[0],
246 v->view_pos.y + v->view_forward[1],
247 v->view_pos.z + v->view_forward[2],
248 v->view_up[0], v->view_up[1], v->view_up[2]);
250 // look almost straight up (testing and eclipse watching)
251 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
252 v->view_pos.x + v->view_up[0] + .001,
253 v->view_pos.y + v->view_up[1] + .001,
254 v->view_pos.z + v->view_up[2] + .001,
255 v->view_up[0], v->view_up[1], v->view_up[2]); */
257 // lock view horizontally towards sun (testing)
258 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
259 v->view_pos.x + v->surface_to_sun[0],
260 v->view_pos.y + v->surface_to_sun[1],
261 v->view_pos.z + v->surface_to_sun[2],
262 v->view_up[0], v->view_up[1], v->view_up[2]); */
264 // lock view horizontally towards south (testing)
265 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
266 v->view_pos.x + v->surface_south[0],
267 v->view_pos.y + v->surface_south[1],
268 v->view_pos.z + v->surface_south[2],
269 v->view_up[0], v->view_up[1], v->view_up[2]); */
271 // set the sun position
272 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
276 // Draw a basic instrument panel
277 static void fgUpdateInstrViewParams( void ) {
278 xglViewport(0, 0 , (GLint)winWidth, (GLint)winHeight / 2);
280 xglMatrixMode(GL_PROJECTION);
284 gluOrtho2D(0, 640, 0, 480);
285 xglMatrixMode(GL_MODELVIEW);
289 xglColor3f(1.0, 1.0, 1.0);
292 xglDisable(GL_DEPTH_TEST);
293 xglDisable(GL_LIGHTING);
296 xglColor3f (0.5, 0.5, 0.5);
299 xglVertex2f(0.0, 0.00);
300 xglVertex2f(0.0, 480.0);
301 xglVertex2f(640.0,480.0);
302 xglVertex2f(640.0, 0.0);
305 xglRectf(0.0,0.0, 640, 480);
306 xglEnable(GL_DEPTH_TEST);
307 xglEnable(GL_LIGHTING);
308 xglMatrixMode(GL_PROJECTION);
310 xglMatrixMode(GL_MODELVIEW);
315 // Update all Visuals (redraws anything graphics related)
316 static void fgRenderFrame( void ) {
322 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
323 GLfloat color[4] = { 0.54, 0.44, 0.29, 1.0 };
325 l = &cur_light_params;
326 o = ¤t_options;
327 t = &cur_time_params;
330 // update view volume parameters
331 fgUpdateViewParams();
333 xglClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
335 // Tell GL we are switching to model view parameters
336 xglMatrixMode(GL_MODELVIEW);
337 // xglLoadIdentity();
340 xglDisable( GL_DEPTH_TEST );
341 xglDisable( GL_LIGHTING );
342 xglDisable( GL_CULL_FACE );
343 xglDisable( GL_FOG );
344 xglShadeModel( GL_SMOOTH );
347 // setup transformation for drawing astronomical objects
349 // Translate to view position
350 xglTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
351 // Rotate based on gst (sidereal time)
352 angle = t->gst * 15.041085; /* should be 15.041085, Curt thought it was 15*/
353 // printf("Rotating astro objects by %.2f degrees\n",angle);
354 xglRotatef( angle, 0.0, 0.0, -1.0 );
356 // draw stars and planets
364 xglEnable( GL_LIGHTING );
365 // set lighting parameters
366 xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
367 xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
368 xglEnable( GL_CULL_FACE );
370 // Let's try some blending technique's (Durk)
372 glBlendFunc(GL_ONE, GL_ONE);
379 xglShadeModel( /* GL_FLAT */ GL_SMOOTH );
380 xglEnable( GL_DEPTH_TEST );
382 xglFogfv (GL_FOG_COLOR, l->fog_color);
383 // set lighting parameters
384 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
385 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
387 if ( o->use_textures ) {
388 // texture parameters
389 xglEnable( GL_TEXTURE_2D );
390 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ) ;
391 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT ) ;
392 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ) ;
393 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
394 GL_LINEAR /* GL_LINEAR_MIPMAP_LINEAR */ ) ;
395 xglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
396 xglHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
397 // set base color (I don't think this is doing anything here)
398 xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
399 xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
401 xglDisable( GL_TEXTURE_2D );
402 xglMaterialfv (GL_FRONT, GL_AMBIENT, color);
403 xglMaterialfv (GL_FRONT, GL_DIFFUSE, color);
408 xglDisable( GL_TEXTURE_2D );
411 if( o->hud_status ) {
415 // display instruments
416 if (displayInstruments) {
417 fgUpdateInstrViewParams();
424 // Update internal time dependent calculations (i.e. flight model)
425 void fgUpdateTimeDepCalcs(int multi_loop) {
431 f = current_aircraft.flight;
432 t = &cur_time_params;
435 // update the flight model
436 if ( multi_loop < 0 ) {
437 multi_loop = DEFAULT_MULTILOOP;
440 // printf("updating flight model x %d\n", multi_loop);
441 fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
443 // update the view angle
444 for ( i = 0; i < multi_loop; i++ ) {
445 if ( fabs(v->goal_view_offset - v->view_offset) < 0.05 ) {
446 v->view_offset = v->goal_view_offset;
449 // move v->view_offset towards v->goal_view_offset
450 if ( v->goal_view_offset > v->view_offset ) {
451 if ( v->goal_view_offset - v->view_offset < FG_PI ) {
452 v->view_offset += 0.01;
454 v->view_offset -= 0.01;
457 if ( v->view_offset - v->goal_view_offset < FG_PI ) {
458 v->view_offset -= 0.01;
460 v->view_offset += 0.01;
463 if ( v->view_offset > FG_2PI ) {
464 v->view_offset -= FG_2PI;
465 } else if ( v->view_offset < 0 ) {
466 v->view_offset += FG_2PI;
473 void fgInitTimeDepCalcs( void ) {
476 #ifdef HAVE_SETITIMER
477 fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
478 #endif HAVE_SETITIMER
483 // What should we do when we have nothing else to do? Let's get ready
484 // for the next move and update the display?
485 static void fgMainLoop( void ) {
486 static int remainder = 0;
487 int elapsed, multi_loop;
489 // double joy_x, joy_y;
490 // int joy_b1, joy_b2;
495 fgPrintf( FG_ALL, FG_DEBUG, "Running Main Loop\n");
496 fgPrintf( FG_ALL, FG_DEBUG, "======= ==== ====\n");
498 a = ¤t_aircraft;
500 t = &cur_time_params;
506 /* fgJoystickRead( &joy_x, &joy_y, &joy_b1, &joy_b2 );
507 printf( "Joystick X %f Y %f B1 %d B2 %d\n",
508 joy_x, joy_y, joy_b1, joy_b2 );
510 fgAileronSet( joy_x ); */
512 // Calculate model iterations needed
513 elapsed = fgGetTimeInterval();
514 fgPrintf( FG_ALL, FG_BULK,
515 "Time interval is = %d, previous remainder is = %d\n",
517 fgPrintf( FG_ALL, FG_BULK,
518 "--> Frame rate is = %.2f\n", 1000.0 / (float)elapsed);
519 elapsed += remainder;
521 multi_loop = (int)(((float)elapsed * 0.001) * DEFAULT_MODEL_HZ);
522 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
523 fgPrintf( FG_ALL, FG_BULK,
524 "Model iterations needed = %d, new remainder = %d\n",
525 multi_loop, remainder);
528 if ( ! use_signals ) {
530 fgUpdateTimeDepCalcs(multi_loop);
533 // I'm just sticking this here for now, it should probably move
535 /* cur_elev = mesh_altitude(FG_Longitude * RAD_TO_ARCSEC,
536 FG_Latitude * RAD_TO_ARCSEC); */
537 // there is no ground collision detection really, so for now I
538 // just hard code the ground elevation to be 0 */
541 // printf("Ground elevation is %.2f meters here.\n", cur_elev);
542 // FG_Runway_altitude = cur_elev * METER_TO_FEET;
544 if ( FG_Altitude * FEET_TO_METER < cur_elev + 3.758099) {
545 // set this here, otherwise if we set runway height above our
546 // current height we get a really nasty bounce.
547 FG_Runway_altitude = FG_Altitude - 3.758099;
549 // now set aircraft altitude above ground
550 FG_Altitude = cur_elev * METER_TO_FEET + 3.758099;
551 fgPrintf( FG_ALL, FG_BULK, "<*> resetting altitude to %.0f meters\n",
552 FG_Altitude * FEET_TO_METER);
555 fgAircraftOutputCurrent(a);
557 // see if we need to load any new scenery tiles
560 // Process/manage pending events
566 fgPrintf( FG_ALL, FG_DEBUG, "\n");
570 // Handle new window size or exposure
571 static void fgReshape( int width, int height ) {
572 // Do this so we can call fgReshape(0,0) ourselves without having
573 // to know what the values of width & height are.
574 if ( (height > 0) && (width > 0) ) {
575 win_ratio = (GLfloat) height / (GLfloat) width;
581 // Inform gl of our view window size (now handled elsewhere)
582 // xglViewport(0, 0, (GLint)width, (GLint)height);
583 fgUpdateViewParams();
585 // xglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
589 // Initialize GLUT and define a main window
590 int fgGlutInit( int argc, char **argv ) {
591 // GLUT will extract all glut specific options so later on we only
592 // need wory about our own.
593 xglutInit(&argc, argv);
595 // Define Display Parameters
596 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
598 // Define initial window size
599 xglutInitWindowSize(640, 480);
601 // Initialize windows
602 xglutCreateWindow("Flight Gear");
608 // Initialize GLUT event handlers
609 int fgGlutInitEvents( void ) {
610 // call fgReshape() on window resizes
611 xglutReshapeFunc( fgReshape );
613 // call GLUTkey() on keyboard event
614 xglutKeyboardFunc( GLUTkey );
615 glutSpecialFunc( GLUTspecialkey );
617 // call fgMainLoop() whenever there is
618 // nothing else to do
619 xglutIdleFunc( fgMainLoop );
622 xglutDisplayFunc( fgRenderFrame );
629 int main( int argc, char **argv ) {
631 int result; // Used in command line argument.
633 f = current_aircraft.flight;
635 // Initialize the debugging output system
638 fgPrintf(FG_GENERAL, FG_INFO, "Flight Gear: Version %s\n\n", VERSION);
640 // Initialize the Window/Graphics environment.
641 if( !fgGlutInit(argc, argv) ) {
642 fgPrintf( FG_GENERAL, FG_EXIT, "GLUT initialization failed ...\n" );
645 // Parse remaining command line options
646 result = current_options.parse(argc, argv);
648 if ( result != FG_OPTIONS_OK ) {
649 // Something must have gone horribly wrong with the command
650 // line parsing or maybe the user just requested help ... :-)
651 current_options.usage();
652 fgPrintf( FG_GENERAL, FG_EXIT, "\nShutting down ...\n");
655 // These are a few miscellaneous things that aren't really
656 // "subsystems" but still need to be initialized.
657 if( !fgInitGeneral()) {
658 fgPrintf( FG_GENERAL, FG_EXIT, "General initializations failed ...\n" );
661 // This is the top level init routine which calls all the other
662 // subsystem initialization routines. If you are adding a
663 // subsystem to flight gear, its initialization call should
664 // located in this routine.
665 if( !fgInitSubsystems()) {
666 fgPrintf( FG_GENERAL, FG_EXIT,
667 "Subsystem initializations failed ...\n" );
670 // setup OpenGL view parameters
674 // init timer routines, signals, etc. Arrange for an alarm
675 // signal to be generated, etc.
676 fgInitTimeDepCalcs();
679 // Initialize the various GLUT Event Handlers.
680 if( !fgGlutInitEvents() ) {
681 fgPrintf( FG_GENERAL, FG_EXIT,
682 "GLUT event handler initialization failed ...\n" );
685 // pass control off to the master GLUT event handler
688 // we never actually get here ... but just in case ... :-)
695 void __eprintf( void ) {
702 // Revision 1.8 1998/04/28 01:20:21 curt
703 // Type-ified fgTIME and fgVIEW.
704 // Added a command line option to disable textures.
706 // Revision 1.7 1998/04/26 05:10:02 curt
707 // "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
709 // Revision 1.6 1998/04/25 22:06:30 curt
710 // Edited cvs log messages in source files ... bad bad bad!
712 // Revision 1.5 1998/04/25 20:24:01 curt
713 // Cleaned up initialization sequence to eliminate interdependencies
714 // between sun position, lighting, and view position. This creates a
715 // valid single pass initialization path.
717 // Revision 1.4 1998/04/24 14:19:30 curt
720 // Revision 1.3 1998/04/24 00:49:18 curt
721 // Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
722 // Trying out some different option parsing code.
723 // Some code reorganization.
725 // Revision 1.2 1998/04/22 13:25:41 curt
726 // C++ - ifing the code.
727 // Starting a bit of reorganization of lighting code.
729 // Revision 1.1 1998/04/21 17:02:39 curt
730 // Prepairing for C++ integration.
732 // Revision 1.71 1998/04/18 04:11:26 curt
733 // Moved fg_debug to it's own library, added zlib support.
735 // Revision 1.70 1998/04/14 02:21:02 curt
736 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
737 // <jgoeke@voyager.net>
739 // Revision 1.69 1998/04/08 23:35:34 curt
740 // Tweaks to Gnu automake/autoconf system.
742 // Revision 1.68 1998/04/03 22:09:03 curt
743 // Converting to Gnu autoconf system.
745 // Revision 1.67 1998/03/23 21:24:37 curt
746 // Source code formating tweaks.
748 // Revision 1.66 1998/03/14 00:31:20 curt
749 // Beginning initial terrain texturing experiments.
751 // Revision 1.65 1998/03/09 22:45:57 curt
752 // Minor tweaks for building on sparc platform.
754 // Revision 1.64 1998/02/20 00:16:23 curt
755 // Thursday's tweaks.
757 // Revision 1.63 1998/02/16 16:17:39 curt
760 // Revision 1.62 1998/02/16 13:39:42 curt
761 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
762 // tiles to occasionally be missing.
764 // Revision 1.61 1998/02/12 21:59:46 curt
765 // Incorporated code changes contributed by Charlie Hotchkiss
766 // <chotchkiss@namg.us.anritsu.com>
768 // Revision 1.60 1998/02/11 02:50:40 curt
771 // Revision 1.59 1998/02/09 22:56:54 curt
772 // Removed "depend" files from cvs control. Other minor make tweaks.
774 // Revision 1.58 1998/02/09 15:07:49 curt
777 // Revision 1.57 1998/02/07 15:29:40 curt
778 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
779 // <chotchkiss@namg.us.anritsu.com>
781 // Revision 1.56 1998/02/03 23:20:23 curt
782 // Lots of little tweaks to fix various consistency problems discovered by
783 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
784 // passed arguments along to the real printf(). Also incorporated HUD changes
785 // by Michele America.
787 // Revision 1.55 1998/02/02 20:53:58 curt
788 // Incorporated Durk's changes.
790 // Revision 1.54 1998/01/31 00:43:10 curt
791 // Added MetroWorks patches from Carmen Volpe.
793 // Revision 1.53 1998/01/27 18:35:54 curt
796 // Revision 1.52 1998/01/27 00:47:56 curt
797 // Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
798 // system and commandline/config file processing code.
800 // Revision 1.51 1998/01/26 15:57:05 curt
801 // Tweaks for dynamic scenery development.
803 // Revision 1.50 1998/01/19 19:27:07 curt
804 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
805 // This should simplify things tremendously.
807 // Revision 1.49 1998/01/19 18:40:31 curt
808 // Tons of little changes to clean up the code and to remove fatal errors
809 // when building with the c++ compiler.
811 // Revision 1.48 1998/01/19 18:35:46 curt
812 // Minor tweaks and fixes for cygwin32.
814 // Revision 1.47 1998/01/13 00:23:08 curt
815 // Initial changes to support loading and management of scenery tiles. Note,
816 // there's still a fair amount of work left to be done.
818 // Revision 1.46 1998/01/08 02:22:06 curt
819 // Beginning to integrate Tile management subsystem.
821 // Revision 1.45 1998/01/07 03:18:55 curt
822 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
824 // Revision 1.44 1997/12/30 22:22:31 curt
825 // Further integration of event manager.
827 // Revision 1.43 1997/12/30 20:47:43 curt
828 // Integrated new event manager with subsystem initializations.
830 // Revision 1.42 1997/12/30 16:36:47 curt
831 // Merged in Durk's changes ...
833 // Revision 1.41 1997/12/30 13:06:56 curt
834 // A couple lighting tweaks ...
836 // Revision 1.40 1997/12/30 01:38:37 curt
837 // Switched back to per vertex normals and smooth shading for terrain.
839 // Revision 1.39 1997/12/22 23:45:45 curt
840 // First stab at sunset/sunrise sky glow effects.
842 // Revision 1.38 1997/12/22 04:14:28 curt
843 // Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
845 // Revision 1.37 1997/12/19 23:34:03 curt
846 // Lot's of tweaking with sky rendering and lighting.
848 // Revision 1.36 1997/12/19 16:44:57 curt
849 // Working on scene rendering order and options.
851 // Revision 1.35 1997/12/18 23:32:32 curt
852 // First stab at sky dome actually starting to look reasonable. :-)
854 // Revision 1.34 1997/12/17 23:13:34 curt
855 // Began working on rendering a sky.
857 // Revision 1.33 1997/12/15 23:54:45 curt
858 // Add xgl wrappers for debugging.
859 // Generate terrain normals on the fly.
861 // Revision 1.32 1997/12/15 20:59:08 curt
864 // Revision 1.31 1997/12/12 21:41:25 curt
865 // More light/material property tweaking ... still a ways off.
867 // Revision 1.30 1997/12/12 19:52:47 curt
868 // Working on lightling and material properties.
870 // Revision 1.29 1997/12/11 04:43:54 curt
871 // Fixed sun vector and lighting problems. I thing the moon is now lit
874 // Revision 1.28 1997/12/10 22:37:45 curt
875 // Prepended "fg" on the name of all global structures that didn't have it yet.
876 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
878 // Revision 1.27 1997/12/09 05:11:54 curt
879 // Working on tweaking lighting.
881 // Revision 1.26 1997/12/09 04:25:29 curt
882 // Working on adding a global lighting params structure.
884 // Revision 1.25 1997/12/08 22:54:09 curt
885 // Enabled GL_CULL_FACE.
887 // Revision 1.24 1997/11/25 19:25:32 curt
888 // Changes to integrate Durk's moon/sun code updates + clean up.
890 // Revision 1.23 1997/11/15 18:16:34 curt
893 // Revision 1.22 1997/10/30 12:38:41 curt
894 // Working on new scenery subsystem.
896 // Revision 1.21 1997/09/23 00:29:38 curt
897 // Tweaks to get things to compile with gcc-win32.
899 // Revision 1.20 1997/09/22 14:44:19 curt
900 // Continuing to try to align stars correctly.
902 // Revision 1.19 1997/09/18 16:20:08 curt
903 // At dusk/dawn add/remove stars in stages.
905 // Revision 1.18 1997/09/16 22:14:51 curt
906 // Tweaked time of day lighting equations. Don't draw stars during the day.
908 // Revision 1.17 1997/09/16 15:50:29 curt
909 // Working on star alignment and time issues.
911 // Revision 1.16 1997/09/13 02:00:06 curt
912 // Mostly working on stars and generating sidereal time for accurate star
915 // Revision 1.15 1997/09/05 14:17:27 curt
916 // More tweaking with stars.
918 // Revision 1.14 1997/09/05 01:35:53 curt
919 // Working on getting stars right.
921 // Revision 1.13 1997/09/04 02:17:34 curt
924 // Revision 1.12 1997/08/27 21:32:24 curt
925 // Restructured view calculation code. Added stars.
927 // Revision 1.11 1997/08/27 03:30:16 curt
928 // Changed naming scheme of basic shared structures.
930 // Revision 1.10 1997/08/25 20:27:22 curt
931 // Merged in initial HUD and Joystick code.
933 // Revision 1.9 1997/08/22 21:34:39 curt
934 // Doing a bit of reorganizing and house cleaning.
936 // Revision 1.8 1997/08/19 23:55:03 curt
937 // Worked on better simulating real lighting.
939 // Revision 1.7 1997/08/16 12:22:38 curt
940 // Working on improving the lighting/shading.
942 // Revision 1.6 1997/08/13 20:24:56 curt
943 // Changes due to changing sunpos interface.
945 // Revision 1.5 1997/08/06 21:08:32 curt
946 // Sun position now really* works (I think) ... I still have sun time warping
947 // code in place, probably should remove it soon.
949 // Revision 1.4 1997/08/06 15:41:26 curt
950 // Working on correct sun position.
952 // Revision 1.3 1997/08/06 00:24:22 curt
953 // Working on correct real time sun lighting.
955 // Revision 1.2 1997/08/04 20:25:15 curt
956 // Organizational tweaking.
958 // Revision 1.1 1997/08/02 18:45:00 curt
959 // Renamed GLmain.c GLUTmain.c
961 // Revision 1.43 1997/08/02 16:23:47 curt
964 // Revision 1.42 1997/08/01 19:43:33 curt
965 // Making progress with coordinate system overhaul.
967 // Revision 1.41 1997/07/31 22:52:37 curt
968 // Working on redoing internal coordinate systems & scenery transformations.
970 // Revision 1.40 1997/07/30 16:12:42 curt
971 // Moved fg_random routines from Util/ to Math/
973 // Revision 1.39 1997/07/21 14:45:01 curt
976 // Revision 1.38 1997/07/19 23:04:47 curt
977 // Added an initial weather section.
979 // Revision 1.37 1997/07/19 22:34:02 curt
980 // Moved PI definitions to ../constants.h
981 // Moved random() stuff to ../Utils/ and renamed fg_random()
983 // Revision 1.36 1997/07/18 23:41:25 curt
984 // Tweaks for building with Cygnus Win32 compiler.
986 // Revision 1.35 1997/07/18 14:28:34 curt
987 // Hacked in some support for wind/turbulence.
989 // Revision 1.34 1997/07/16 20:04:48 curt
990 // Minor tweaks to aid Win32 port.
992 // Revision 1.33 1997/07/12 03:50:20 curt
993 // Added an #include <Windows32/Base.h> to help compiling for Win32
995 // Revision 1.32 1997/07/11 03:23:18 curt
996 // Solved some scenery display/orientation problems. Still have a positioning
997 // (or transformation?) problem.
999 // Revision 1.31 1997/07/11 01:29:58 curt
1000 // More tweaking of terrian floor.
1002 // Revision 1.30 1997/07/10 04:26:37 curt
1003 // We now can interpolated ground elevation for any position in the grid. We
1004 // can use this to enforce a "hard" ground. We still need to enforce some
1005 // bounds checking so that we don't try to lookup data points outside the
1008 // Revision 1.29 1997/07/09 21:31:12 curt
1009 // Working on making the ground "hard."
1011 // Revision 1.28 1997/07/08 18:20:12 curt
1012 // Working on establishing a hard ground.
1014 // Revision 1.27 1997/07/07 20:59:49 curt
1015 // Working on scenery transformations to enable us to fly fluidly over the
1016 // poles with no discontinuity/distortion in scenery.
1018 // Revision 1.26 1997/07/05 20:43:34 curt
1019 // renamed mat3 directory to Math so we could add other math related routines.
1021 // Revision 1.25 1997/06/29 21:19:17 curt
1022 // Working on scenery management system.
1024 // Revision 1.24 1997/06/26 22:14:53 curt
1025 // Beginning work on a scenery management system.
1027 // Revision 1.23 1997/06/26 19:08:33 curt
1028 // Restructuring make, adding automatic "make dep" support.
1030 // Revision 1.22 1997/06/25 15:39:47 curt
1031 // Minor changes to compile with rsxnt/win32.
1033 // Revision 1.21 1997/06/22 21:44:41 curt
1034 // Working on intergrating the VRML (subset) parser.
1036 // Revision 1.20 1997/06/21 17:12:53 curt
1037 // Capitalized subdirectory names.
1039 // Revision 1.19 1997/06/18 04:10:31 curt
1040 // A couple more runway tweaks ...
1042 // Revision 1.18 1997/06/18 02:21:24 curt
1043 // Hacked in a runway
1045 // Revision 1.17 1997/06/17 16:51:58 curt
1046 // Timer interval stuff now uses gettimeofday() instead of ftime()
1048 // Revision 1.16 1997/06/17 04:19:16 curt
1049 // More timer related tweaks with respect to view direction changes.
1051 // Revision 1.15 1997/06/17 03:41:10 curt
1052 // Nonsignal based interval timing is now working.
1053 // This would be a good time to look at cleaning up the code structure a bit.
1055 // Revision 1.14 1997/06/16 19:32:51 curt
1056 // Starting to add general timer support.
1058 // Revision 1.13 1997/06/02 03:40:06 curt
1059 // A tiny bit more view tweaking.
1061 // Revision 1.12 1997/06/02 03:01:38 curt
1062 // Working on views (side, front, back, transitions, etc.)
1064 // Revision 1.11 1997/05/31 19:16:25 curt
1065 // Elevator trim added.
1067 // Revision 1.10 1997/05/31 04:13:52 curt
1068 // WE CAN NOW FLY!!!
1070 // Continuing work on the LaRCsim flight model integration.
1071 // Added some MSFS-like keyboard input handling.
1073 // Revision 1.9 1997/05/30 19:27:01 curt
1074 // The LaRCsim flight model is starting to look like it is working.
1076 // Revision 1.8 1997/05/30 03:54:10 curt
1077 // Made a bit more progress towards integrating the LaRCsim flight model.
1079 // Revision 1.7 1997/05/29 22:39:49 curt
1080 // Working on incorporating the LaRCsim flight model.
1082 // Revision 1.6 1997/05/29 12:31:39 curt
1083 // Minor tweaks, moving towards general flight model integration.
1085 // Revision 1.5 1997/05/29 02:33:23 curt
1086 // Updated to reflect changing interfaces in other "modules."
1088 // Revision 1.4 1997/05/27 17:44:31 curt
1089 // Renamed & rearranged variables and routines. Added some initial simple
1090 // timer/alarm routines so the flight model can be updated on a regular
1093 // Revision 1.3 1997/05/23 15:40:25 curt
1094 // Added GNU copyright headers.
1097 // Revision 1.2 1997/05/23 00:35:12 curt
1098 // Trying to get fog to work ...
1100 // Revision 1.1 1997/05/21 15:57:51 curt
1101 // Renamed due to added GLUT support.
1103 // Revision 1.3 1997/05/19 18:22:42 curt
1104 // Parameter tweaking ... starting to stub in fog support.
1106 // Revision 1.2 1997/05/17 00:17:34 curt
1107 // Trying to stub in support for standard OpenGL.
1109 // Revision 1.1 1997/05/16 16:05:52 curt
1110 // Initial revision.