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)
43 #include <Include/fg_constants.h> // for VERSION
44 #include <Include/general.h>
46 #include <Aircraft/aircraft.h>
47 #include <Astro/moon.hxx>
48 #include <Astro/planets.hxx>
49 #include <Astro/sky.hxx>
50 #include <Astro/stars.hxx>
51 #include <Astro/sun.hxx>
52 #include <Cockpit/cockpit.hxx>
53 #include <Debug/fg_debug.h>
54 #include <Joystick/joystick.h>
55 #include <Math/fg_geodesy.h>
56 #include <Math/mat3.h>
57 #include <Math/polar3d.h>
58 #include <Scenery/scenery.hxx>
59 #include <Scenery/tilemgr.hxx>
60 #include <Time/event.hxx>
61 #include <Time/fg_time.hxx>
62 #include <Time/fg_timer.hxx>
63 #include <Time/sunpos.hxx>
64 #include <Weather/weather.h>
66 #include "GLUTkey.hxx"
67 #include "fg_init.hxx"
68 #include "options.hxx"
72 // This is a record containing global housekeeping information
78 // Yet another other hack. Used for my prototype instrument code. (Durk)
79 int displayInstruments;
82 // The following defines flight gear options. Because glutlib will also
83 // want to parse its own options, those options must not be included here
84 // or they will get parsed by the main program option parser. Hence case
85 // is significant for any option added that might be in conflict with
88 // glutlib parses for:
90 // -direct (invalid in Win32)
94 // -indirect (invalid in Win32)
97 // Note that glutlib depends upon strings while this program's
98 // option parser wants only initial characters followed by numbers
101 const char *fg_cmdargopts = "a:c:Hhp:r:v:x:?";
104 // -a aircraftfilename aircraft start over ride
105 // -c0x0000 - 0xffffffff debug class setting
106 // H,h.? help on command line use (does not need Option struct)
108 // -r flightgear root path to program support files
109 // -v0 -v1 initial view mode (hud/no_hud currently)
110 // -xlogpathname debug logfile name
112 // Defaults in arguments to indicate not set on command line.
113 // Program defaults set variables from constants if neither command
114 // options or environmental variables effect values.
117 char acArgbuf [ MAXPATH + 1] = "\0";
118 int debugArgValue = -2;
119 int priorityArgValue = -1;
120 char rootArgbuf [ MAXPATH + 1] = "\0";
122 char logArgbuf [ MAXPATH + 1] = "\0";
124 // There is a reason for defining the option structs by name and then
125 // creating an array of pointers to options. C++ is unfriendly to
126 // initializing arrays of objects that are not built in types. Always
127 // look forward. (Besides, you can follow what is going on better and
128 // add or modify with greater security. -ch
130 Option aircraftOption = { 'a',
133 "Startup aircraft pathname override"
135 Option debugOption = { 'c',
136 OPT_LHEX, // Long int (32 bits)
140 Option priorityOption = { 'p',
143 "Debug priority Threshold"
145 Option rootOption = { 'r',
148 "Root directory for execution"
150 Option hudOption = { 'v',
153 "View mode start" // Naked,HUD,Panel,Chase,Tower...
156 // Only naked view and HUD are implemented at this time
157 Option logfileOption = { 'x',
160 "Debug log file name"
163 #define OptsDefined 6
164 Option *CmdLineOptions[ OptsDefined ] = {
173 const char *DefaultRootDir = "\\Flightgear";
174 const char *DefaultAircraft = "Navion.acf";
175 const char *DefaultDebuglog = "fgdebug.log";
176 const int DefaultViewMode = HUD_VIEW;
179 // Debug defaults handled in fg_debug.c
181 // fgInitVisuals() -- Initialize various GL/view parameters
182 static void fgInitVisuals( void ) {
187 l = &cur_light_params;
188 o = ¤t_options;
189 w = ¤t_weather;
191 // Go full screen if requested ...
192 if ( o->fullscreen ) {
196 // If enabled, normal vectors specified with glNormal are scaled
197 // to unit length after transformation. See glNormal.
198 xglEnable( GL_NORMALIZE );
200 xglEnable( GL_LIGHTING );
201 xglEnable( GL_LIGHT0 );
202 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
204 xglFogi (GL_FOG_MODE, GL_LINEAR);
205 xglFogf (GL_FOG_START, w->visibility / 1000000.0 );
206 xglFogf (GL_FOG_END, w->visibility);
207 // xglFogf (GL_FOG_DENSITY, w->visibility);
209 xglHint (GL_FOG_HINT, GL_NICEST );
211 xglHint (GL_FOG_HINT, GL_FASTEST );
213 if ( o->wireframe ) {
215 xglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
220 // Update the view volume, position, and orientation
221 static void fgUpdateViewParams( void ) {
227 f = current_aircraft.flight;
228 l = &cur_light_params;
229 o = ¤t_options;
233 v->UpdateWorldToEye(f);
235 if (displayInstruments) {
236 xglViewport( 0, (GLint)((v->winHeight) / 2 ) ,
237 (GLint)(v->winWidth), (GLint)(v->winHeight) / 2 );
238 // Tell GL we are about to modify the projection parameters
239 xglMatrixMode(GL_PROJECTION);
241 gluPerspective(o->fov, v->win_ratio / 2.0, 1.0, 100000.0);
243 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) );
244 // Tell GL we are about to modify the projection parameters
245 xglMatrixMode(GL_PROJECTION);
247 gluPerspective(o->fov, v->win_ratio, 10.0, 100000.0);
250 xglMatrixMode(GL_MODELVIEW);
253 // set up our view volume (default)
254 gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
255 v->view_pos.x + v->view_forward[0],
256 v->view_pos.y + v->view_forward[1],
257 v->view_pos.z + v->view_forward[2],
258 v->view_up[0], v->view_up[1], v->view_up[2]);
260 // look almost straight up (testing and eclipse watching)
261 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
262 v->view_pos.x + v->view_up[0] + .001,
263 v->view_pos.y + v->view_up[1] + .001,
264 v->view_pos.z + v->view_up[2] + .001,
265 v->view_up[0], v->view_up[1], v->view_up[2]); */
267 // lock view horizontally towards sun (testing)
268 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
269 v->view_pos.x + v->surface_to_sun[0],
270 v->view_pos.y + v->surface_to_sun[1],
271 v->view_pos.z + v->surface_to_sun[2],
272 v->view_up[0], v->view_up[1], v->view_up[2]); */
274 // lock view horizontally towards south (testing)
275 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
276 v->view_pos.x + v->surface_south[0],
277 v->view_pos.y + v->surface_south[1],
278 v->view_pos.z + v->surface_south[2],
279 v->view_up[0], v->view_up[1], v->view_up[2]); */
281 // set the sun position
282 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
286 // Draw a basic instrument panel
287 static void fgUpdateInstrViewParams( void ) {
292 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) / 2);
294 xglMatrixMode(GL_PROJECTION);
298 gluOrtho2D(0, 640, 0, 480);
299 xglMatrixMode(GL_MODELVIEW);
303 xglColor3f(1.0, 1.0, 1.0);
306 xglDisable(GL_DEPTH_TEST);
307 xglDisable(GL_LIGHTING);
310 xglColor3f (0.5, 0.5, 0.5);
313 xglVertex2f(0.0, 0.00);
314 xglVertex2f(0.0, 480.0);
315 xglVertex2f(640.0,480.0);
316 xglVertex2f(640.0, 0.0);
319 xglRectf(0.0,0.0, 640, 480);
320 xglEnable(GL_DEPTH_TEST);
321 xglEnable(GL_LIGHTING);
322 xglMatrixMode(GL_PROJECTION);
324 xglMatrixMode(GL_MODELVIEW);
329 // Update all Visuals (redraws anything graphics related)
330 static void fgRenderFrame( void ) {
336 GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
337 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
338 GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
340 l = &cur_light_params;
341 o = ¤t_options;
342 t = &cur_time_params;
345 // update view volume parameters
346 fgUpdateViewParams();
349 glClearColor(black[0], black[1], black[2], black[3]);
351 glClearColor(l->sky_color[0], l->sky_color[1],
352 l->sky_color[2], l->sky_color[3]);
354 xglClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
356 // Tell GL we are switching to model view parameters
357 xglMatrixMode(GL_MODELVIEW);
358 // xglLoadIdentity();
361 xglDisable( GL_DEPTH_TEST );
362 xglDisable( GL_LIGHTING );
363 xglDisable( GL_CULL_FACE );
364 xglDisable( GL_FOG );
365 xglShadeModel( GL_SMOOTH );
370 // setup transformation for drawing astronomical objects
372 // Translate to view position
373 xglTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
374 // Rotate based on gst (sidereal time)
375 angle = t->gst * 15.041085; /* should be 15.041085, Curt thought it was 15*/
376 // printf("Rotating astro objects by %.2f degrees\n",angle);
377 xglRotatef( angle, 0.0, 0.0, -1.0 );
379 // draw stars and planets
387 xglEnable( GL_LIGHTING );
388 // set lighting parameters
389 xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
390 xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
391 xglEnable( GL_CULL_FACE );
393 // Let's try some blending technique's (Durk)
395 glBlendFunc(GL_ONE, GL_ONE);
403 xglShadeModel( GL_SMOOTH );
405 xglShadeModel( GL_FLAT );
407 xglEnable( GL_DEPTH_TEST );
410 xglFogfv (GL_FOG_COLOR, l->fog_color);
412 // set lighting parameters
413 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
414 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
417 // texture parameters
418 xglEnable( GL_TEXTURE_2D );
419 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ) ;
420 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT ) ;
421 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ) ;
422 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
423 GL_LINEAR /* GL_LINEAR_MIPMAP_LINEAR */ ) ;
424 xglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
425 xglHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
426 // set base color (I don't think this is doing anything here)
427 xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
428 xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
430 xglDisable( GL_TEXTURE_2D );
431 xglMaterialfv (GL_FRONT, GL_AMBIENT, terrain_color);
432 xglMaterialfv (GL_FRONT, GL_DIFFUSE, terrain_color);
437 xglDisable( GL_TEXTURE_2D );
440 if( o->hud_status ) {
444 // display instruments
445 if (displayInstruments) {
446 fgUpdateInstrViewParams();
453 // Update internal time dependent calculations (i.e. flight model)
454 void fgUpdateTimeDepCalcs(int multi_loop) {
460 f = current_aircraft.flight;
461 t = &cur_time_params;
464 // update the flight model
465 if ( multi_loop < 0 ) {
466 multi_loop = DEFAULT_MULTILOOP;
469 // printf("updating flight model x %d\n", multi_loop);
470 fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
472 // update the view angle
473 for ( i = 0; i < multi_loop; i++ ) {
474 if ( fabs(v->goal_view_offset - v->view_offset) < 0.05 ) {
475 v->view_offset = v->goal_view_offset;
478 // move v->view_offset towards v->goal_view_offset
479 if ( v->goal_view_offset > v->view_offset ) {
480 if ( v->goal_view_offset - v->view_offset < FG_PI ) {
481 v->view_offset += 0.01;
483 v->view_offset -= 0.01;
486 if ( v->view_offset - v->goal_view_offset < FG_PI ) {
487 v->view_offset -= 0.01;
489 v->view_offset += 0.01;
492 if ( v->view_offset > FG_2PI ) {
493 v->view_offset -= FG_2PI;
494 } else if ( v->view_offset < 0 ) {
495 v->view_offset += FG_2PI;
502 void fgInitTimeDepCalcs( void ) {
505 #ifdef HAVE_SETITIMER
506 fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
507 #endif HAVE_SETITIMER
512 // What should we do when we have nothing else to do? Let's get ready
513 // for the next move and update the display?
514 static void fgMainLoop( void ) {
519 static int remainder = 0;
520 int elapsed, multi_loop;
524 // double joy_x, joy_y;
525 // int joy_b1, joy_b2;
527 a = ¤t_aircraft;
530 t = &cur_time_params;
532 fgPrintf( FG_ALL, FG_DEBUG, "Running Main Loop\n");
533 fgPrintf( FG_ALL, FG_DEBUG, "======= ==== ====\n");
539 /* fgJoystickRead( &joy_x, &joy_y, &joy_b1, &joy_b2 );
540 printf( "Joystick X %f Y %f B1 %d B2 %d\n",
541 joy_x, joy_y, joy_b1, joy_b2 );
543 fgAileronSet( joy_x ); */
545 // Get elapsed time for this past frame
546 elapsed = fgGetTimeInterval();
547 fgPrintf( FG_ALL, FG_BULK,
548 "Time interval is = %d, previous remainder is = %d\n",
551 // Calculate frame rate average
552 if ( elapsed > 0.0 ) {
554 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
555 accum += g->frames[i];
556 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
557 g->frames[i+1] = g->frames[i];
559 g->frames[0] = 1000.0 / (float)elapsed;
560 // printf("frame[0] = %.2f\n", g->frames[0]);
561 accum += g->frames[0];
562 g->frame_rate = accum / (float)FG_FRAME_RATE_HISTORY;
563 // printf("ave = %.2f\n", g->frame_rate);
566 // Calculate model iterations needed for next frame
567 fgPrintf( FG_ALL, FG_DEBUG,
568 "--> Frame rate is = %.2f\n", g->frame_rate);
569 elapsed += remainder;
571 multi_loop = (int)(((float)elapsed * 0.001) * DEFAULT_MODEL_HZ);
572 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
573 fgPrintf( FG_ALL, FG_BULK,
574 "Model iterations needed = %d, new remainder = %d\n",
575 multi_loop, remainder);
578 if ( ! use_signals ) {
580 fgUpdateTimeDepCalcs(multi_loop);
583 // I'm just sticking this here for now, it should probably move
585 /* cur_elev = mesh_altitude(FG_Longitude * RAD_TO_ARCSEC,
586 FG_Latitude * RAD_TO_ARCSEC); */
587 // there is no ground collision detection really, so for now I
588 // just hard code the ground elevation to be 0 */
591 // printf("Ground elevation is %.2f meters here.\n", cur_elev);
592 // FG_Runway_altitude = cur_elev * METER_TO_FEET;
594 if ( FG_Altitude * FEET_TO_METER < cur_elev + 3.758099) {
595 // set this here, otherwise if we set runway height above our
596 // current height we get a really nasty bounce.
597 FG_Runway_altitude = FG_Altitude - 3.758099;
599 // now set aircraft altitude above ground
600 FG_Altitude = cur_elev * METER_TO_FEET + 3.758099;
601 fgPrintf( FG_ALL, FG_BULK, "<*> resetting altitude to %.0f meters\n",
602 FG_Altitude * FEET_TO_METER);
605 fgAircraftOutputCurrent(a);
607 // see if we need to load any new scenery tiles
610 // Process/manage pending events
616 fgPrintf( FG_ALL, FG_DEBUG, "\n");
620 // Handle new window size or exposure
621 static void fgReshape( int width, int height ) {
626 // Do this so we can call fgReshape(0,0) ourselves without having
627 // to know what the values of width & height are.
628 if ( (height > 0) && (width > 0) ) {
629 v->win_ratio = (GLfloat) width / (GLfloat) height;
633 v->winHeight = height;
635 // Inform gl of our view window size (now handled elsewhere)
636 // xglViewport(0, 0, (GLint)width, (GLint)height);
637 fgUpdateViewParams();
639 // xglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
643 // Initialize GLUT and define a main window
644 int fgGlutInit( int *argc, char **argv ) {
645 // GLUT will extract all glut specific options so later on we only
646 // need wory about our own.
647 xglutInit(argc, argv);
649 // Define Display Parameters
650 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
652 // Define initial window size
653 xglutInitWindowSize(640, 480);
655 // Initialize windows
656 xglutCreateWindow("Flight Gear");
662 // Initialize GLUT event handlers
663 int fgGlutInitEvents( void ) {
664 // call fgReshape() on window resizes
665 xglutReshapeFunc( fgReshape );
667 // call GLUTkey() on keyboard event
668 xglutKeyboardFunc( GLUTkey );
669 glutSpecialFunc( GLUTspecialkey );
671 // call fgMainLoop() whenever there is
672 // nothing else to do
673 xglutIdleFunc( fgMainLoop );
676 xglutDisplayFunc( fgRenderFrame );
683 int main( int argc, char **argv ) {
687 int result; // Used in command line argument.
689 f = current_aircraft.flight;
690 o = ¤t_options;
693 _control87(MCW_EM, MCW_EM); /* defined in float.h */
696 // Initialize the debugging output system
699 fgPrintf(FG_GENERAL, FG_INFO, "Flight Gear: Version %s\n\n", VERSION);
701 // Initialize the Window/Graphics environment.
702 if( !fgGlutInit(&argc, argv) ) {
703 fgPrintf( FG_GENERAL, FG_EXIT, "GLUT initialization failed ...\n" );
706 // Attempt to locate and parse a config file
707 // First check fg_root
708 strcpy(config, o->fg_root);
709 strcat(config, "/system.fgfsrc");
710 result = o->parse_config_file(config);
712 // Next check home directory
713 if ( getenv("HOME") != NULL ) {
714 strcpy(config, getenv("HOME"));
715 strcat(config, "/.fgfsrc");
716 result = o->parse_config_file(config);
719 // Parse remaining command line options
720 // These will override anything specified in a config file
721 result = o->parse_command_line(argc, argv);
722 if ( result != FG_OPTIONS_OK ) {
723 // Something must have gone horribly wrong with the command
724 // line parsing or maybe the user just requested help ... :-)
726 fgPrintf( FG_GENERAL, FG_EXIT, "\nExiting ...\n");
729 // These are a few miscellaneous things that aren't really
730 // "subsystems" but still need to be initialized.
731 if( !fgInitGeneral()) {
732 fgPrintf( FG_GENERAL, FG_EXIT, "General initializations failed ...\n" );
735 // This is the top level init routine which calls all the other
736 // subsystem initialization routines. If you are adding a
737 // subsystem to flight gear, its initialization call should
738 // located in this routine.
739 if( !fgInitSubsystems()) {
740 fgPrintf( FG_GENERAL, FG_EXIT,
741 "Subsystem initializations failed ...\n" );
744 // setup OpenGL view parameters
748 // init timer routines, signals, etc. Arrange for an alarm
749 // signal to be generated, etc.
750 fgInitTimeDepCalcs();
753 // Initialize the various GLUT Event Handlers.
754 if( !fgGlutInitEvents() ) {
755 fgPrintf( FG_GENERAL, FG_EXIT,
756 "GLUT event handler initialization failed ...\n" );
759 // pass control off to the master GLUT event handler
762 // we never actually get here ... but just in case ... :-)
769 void __eprintf( void ) {
776 // Revision 1.15 1998/05/16 13:08:34 curt
777 // C++ - ified views.[ch]xx
778 // Shuffled some additional view parameters into the fgVIEW class.
779 // Changed tile-radius to tile-diameter because it is a much better
781 // Added a WORLD_TO_EYE transformation to views.cxx. This allows us
782 // to transform world space to eye space for view frustum culling.
784 // Revision 1.14 1998/05/13 18:29:57 curt
785 // Added a keyboard binding to dynamically adjust field of view.
786 // Added a command line option to specify fov.
787 // Adjusted terrain color.
788 // Root path info moved to fgOPTIONS.
789 // Added ability to parse options out of a config file.
791 // Revision 1.13 1998/05/11 18:18:15 curt
792 // For flat shading use "glHint (GL_FOG_HINT, GL_FASTEST )"
794 // Revision 1.12 1998/05/07 23:14:15 curt
795 // Added "D" key binding to set autopilot heading.
796 // Made frame rate calculation average out over last 10 frames.
797 // Borland C++ floating point exception workaround.
798 // Added a --tile-radius=n option.
800 // Revision 1.11 1998/05/06 03:16:23 curt
801 // Added an averaged global frame rate counter.
802 // Added an option to control tile radius.
804 // Revision 1.10 1998/05/03 00:47:31 curt
805 // Added an option to enable/disable full-screen mode.
807 // Revision 1.9 1998/04/30 12:34:17 curt
808 // Added command line rendering options:
809 // enable/disable fog/haze
810 // specify smooth/flat shading
811 // disable sky blending and just use a solid color
812 // enable wireframe drawing mode
814 // Revision 1.8 1998/04/28 01:20:21 curt
815 // Type-ified fgTIME and fgVIEW.
816 // Added a command line option to disable textures.
818 // Revision 1.7 1998/04/26 05:10:02 curt
819 // "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
821 // Revision 1.6 1998/04/25 22:06:30 curt
822 // Edited cvs log messages in source files ... bad bad bad!
824 // Revision 1.5 1998/04/25 20:24:01 curt
825 // Cleaned up initialization sequence to eliminate interdependencies
826 // between sun position, lighting, and view position. This creates a
827 // valid single pass initialization path.
829 // Revision 1.4 1998/04/24 14:19:30 curt
832 // Revision 1.3 1998/04/24 00:49:18 curt
833 // Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
834 // Trying out some different option parsing code.
835 // Some code reorganization.
837 // Revision 1.2 1998/04/22 13:25:41 curt
838 // C++ - ifing the code.
839 // Starting a bit of reorganization of lighting code.
841 // Revision 1.1 1998/04/21 17:02:39 curt
842 // Prepairing for C++ integration.
844 // Revision 1.71 1998/04/18 04:11:26 curt
845 // Moved fg_debug to it's own library, added zlib support.
847 // Revision 1.70 1998/04/14 02:21:02 curt
848 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
849 // <jgoeke@voyager.net>
851 // Revision 1.69 1998/04/08 23:35:34 curt
852 // Tweaks to Gnu automake/autoconf system.
854 // Revision 1.68 1998/04/03 22:09:03 curt
855 // Converting to Gnu autoconf system.
857 // Revision 1.67 1998/03/23 21:24:37 curt
858 // Source code formating tweaks.
860 // Revision 1.66 1998/03/14 00:31:20 curt
861 // Beginning initial terrain texturing experiments.
863 // Revision 1.65 1998/03/09 22:45:57 curt
864 // Minor tweaks for building on sparc platform.
866 // Revision 1.64 1998/02/20 00:16:23 curt
867 // Thursday's tweaks.
869 // Revision 1.63 1998/02/16 16:17:39 curt
872 // Revision 1.62 1998/02/16 13:39:42 curt
873 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
874 // tiles to occasionally be missing.
876 // Revision 1.61 1998/02/12 21:59:46 curt
877 // Incorporated code changes contributed by Charlie Hotchkiss
878 // <chotchkiss@namg.us.anritsu.com>
880 // Revision 1.60 1998/02/11 02:50:40 curt
883 // Revision 1.59 1998/02/09 22:56:54 curt
884 // Removed "depend" files from cvs control. Other minor make tweaks.
886 // Revision 1.58 1998/02/09 15:07:49 curt
889 // Revision 1.57 1998/02/07 15:29:40 curt
890 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
891 // <chotchkiss@namg.us.anritsu.com>
893 // Revision 1.56 1998/02/03 23:20:23 curt
894 // Lots of little tweaks to fix various consistency problems discovered by
895 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
896 // passed arguments along to the real printf(). Also incorporated HUD changes
897 // by Michele America.
899 // Revision 1.55 1998/02/02 20:53:58 curt
900 // Incorporated Durk's changes.
902 // Revision 1.54 1998/01/31 00:43:10 curt
903 // Added MetroWorks patches from Carmen Volpe.
905 // Revision 1.53 1998/01/27 18:35:54 curt
908 // Revision 1.52 1998/01/27 00:47:56 curt
909 // Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
910 // system and commandline/config file processing code.
912 // Revision 1.51 1998/01/26 15:57:05 curt
913 // Tweaks for dynamic scenery development.
915 // Revision 1.50 1998/01/19 19:27:07 curt
916 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
917 // This should simplify things tremendously.
919 // Revision 1.49 1998/01/19 18:40:31 curt
920 // Tons of little changes to clean up the code and to remove fatal errors
921 // when building with the c++ compiler.
923 // Revision 1.48 1998/01/19 18:35:46 curt
924 // Minor tweaks and fixes for cygwin32.
926 // Revision 1.47 1998/01/13 00:23:08 curt
927 // Initial changes to support loading and management of scenery tiles. Note,
928 // there's still a fair amount of work left to be done.
930 // Revision 1.46 1998/01/08 02:22:06 curt
931 // Beginning to integrate Tile management subsystem.
933 // Revision 1.45 1998/01/07 03:18:55 curt
934 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
936 // Revision 1.44 1997/12/30 22:22:31 curt
937 // Further integration of event manager.
939 // Revision 1.43 1997/12/30 20:47:43 curt
940 // Integrated new event manager with subsystem initializations.
942 // Revision 1.42 1997/12/30 16:36:47 curt
943 // Merged in Durk's changes ...
945 // Revision 1.41 1997/12/30 13:06:56 curt
946 // A couple lighting tweaks ...
948 // Revision 1.40 1997/12/30 01:38:37 curt
949 // Switched back to per vertex normals and smooth shading for terrain.
951 // Revision 1.39 1997/12/22 23:45:45 curt
952 // First stab at sunset/sunrise sky glow effects.
954 // Revision 1.38 1997/12/22 04:14:28 curt
955 // Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
957 // Revision 1.37 1997/12/19 23:34:03 curt
958 // Lot's of tweaking with sky rendering and lighting.
960 // Revision 1.36 1997/12/19 16:44:57 curt
961 // Working on scene rendering order and options.
963 // Revision 1.35 1997/12/18 23:32:32 curt
964 // First stab at sky dome actually starting to look reasonable. :-)
966 // Revision 1.34 1997/12/17 23:13:34 curt
967 // Began working on rendering a sky.
969 // Revision 1.33 1997/12/15 23:54:45 curt
970 // Add xgl wrappers for debugging.
971 // Generate terrain normals on the fly.
973 // Revision 1.32 1997/12/15 20:59:08 curt
976 // Revision 1.31 1997/12/12 21:41:25 curt
977 // More light/material property tweaking ... still a ways off.
979 // Revision 1.30 1997/12/12 19:52:47 curt
980 // Working on lightling and material properties.
982 // Revision 1.29 1997/12/11 04:43:54 curt
983 // Fixed sun vector and lighting problems. I thing the moon is now lit
986 // Revision 1.28 1997/12/10 22:37:45 curt
987 // Prepended "fg" on the name of all global structures that didn't have it yet.
988 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
990 // Revision 1.27 1997/12/09 05:11:54 curt
991 // Working on tweaking lighting.
993 // Revision 1.26 1997/12/09 04:25:29 curt
994 // Working on adding a global lighting params structure.
996 // Revision 1.25 1997/12/08 22:54:09 curt
997 // Enabled GL_CULL_FACE.
999 // Revision 1.24 1997/11/25 19:25:32 curt
1000 // Changes to integrate Durk's moon/sun code updates + clean up.
1002 // Revision 1.23 1997/11/15 18:16:34 curt
1005 // Revision 1.22 1997/10/30 12:38:41 curt
1006 // Working on new scenery subsystem.
1008 // Revision 1.21 1997/09/23 00:29:38 curt
1009 // Tweaks to get things to compile with gcc-win32.
1011 // Revision 1.20 1997/09/22 14:44:19 curt
1012 // Continuing to try to align stars correctly.
1014 // Revision 1.19 1997/09/18 16:20:08 curt
1015 // At dusk/dawn add/remove stars in stages.
1017 // Revision 1.18 1997/09/16 22:14:51 curt
1018 // Tweaked time of day lighting equations. Don't draw stars during the day.
1020 // Revision 1.17 1997/09/16 15:50:29 curt
1021 // Working on star alignment and time issues.
1023 // Revision 1.16 1997/09/13 02:00:06 curt
1024 // Mostly working on stars and generating sidereal time for accurate star
1027 // Revision 1.15 1997/09/05 14:17:27 curt
1028 // More tweaking with stars.
1030 // Revision 1.14 1997/09/05 01:35:53 curt
1031 // Working on getting stars right.
1033 // Revision 1.13 1997/09/04 02:17:34 curt
1036 // Revision 1.12 1997/08/27 21:32:24 curt
1037 // Restructured view calculation code. Added stars.
1039 // Revision 1.11 1997/08/27 03:30:16 curt
1040 // Changed naming scheme of basic shared structures.
1042 // Revision 1.10 1997/08/25 20:27:22 curt
1043 // Merged in initial HUD and Joystick code.
1045 // Revision 1.9 1997/08/22 21:34:39 curt
1046 // Doing a bit of reorganizing and house cleaning.
1048 // Revision 1.8 1997/08/19 23:55:03 curt
1049 // Worked on better simulating real lighting.
1051 // Revision 1.7 1997/08/16 12:22:38 curt
1052 // Working on improving the lighting/shading.
1054 // Revision 1.6 1997/08/13 20:24:56 curt
1055 // Changes due to changing sunpos interface.
1057 // Revision 1.5 1997/08/06 21:08:32 curt
1058 // Sun position now really* works (I think) ... I still have sun time warping
1059 // code in place, probably should remove it soon.
1061 // Revision 1.4 1997/08/06 15:41:26 curt
1062 // Working on correct sun position.
1064 // Revision 1.3 1997/08/06 00:24:22 curt
1065 // Working on correct real time sun lighting.
1067 // Revision 1.2 1997/08/04 20:25:15 curt
1068 // Organizational tweaking.
1070 // Revision 1.1 1997/08/02 18:45:00 curt
1071 // Renamed GLmain.c GLUTmain.c
1073 // Revision 1.43 1997/08/02 16:23:47 curt
1076 // Revision 1.42 1997/08/01 19:43:33 curt
1077 // Making progress with coordinate system overhaul.
1079 // Revision 1.41 1997/07/31 22:52:37 curt
1080 // Working on redoing internal coordinate systems & scenery transformations.
1082 // Revision 1.40 1997/07/30 16:12:42 curt
1083 // Moved fg_random routines from Util/ to Math/
1085 // Revision 1.39 1997/07/21 14:45:01 curt
1088 // Revision 1.38 1997/07/19 23:04:47 curt
1089 // Added an initial weather section.
1091 // Revision 1.37 1997/07/19 22:34:02 curt
1092 // Moved PI definitions to ../constants.h
1093 // Moved random() stuff to ../Utils/ and renamed fg_random()
1095 // Revision 1.36 1997/07/18 23:41:25 curt
1096 // Tweaks for building with Cygnus Win32 compiler.
1098 // Revision 1.35 1997/07/18 14:28:34 curt
1099 // Hacked in some support for wind/turbulence.
1101 // Revision 1.34 1997/07/16 20:04:48 curt
1102 // Minor tweaks to aid Win32 port.
1104 // Revision 1.33 1997/07/12 03:50:20 curt
1105 // Added an #include <Windows32/Base.h> to help compiling for Win32
1107 // Revision 1.32 1997/07/11 03:23:18 curt
1108 // Solved some scenery display/orientation problems. Still have a positioning
1109 // (or transformation?) problem.
1111 // Revision 1.31 1997/07/11 01:29:58 curt
1112 // More tweaking of terrian floor.
1114 // Revision 1.30 1997/07/10 04:26:37 curt
1115 // We now can interpolated ground elevation for any position in the grid. We
1116 // can use this to enforce a "hard" ground. We still need to enforce some
1117 // bounds checking so that we don't try to lookup data points outside the
1120 // Revision 1.29 1997/07/09 21:31:12 curt
1121 // Working on making the ground "hard."
1123 // Revision 1.28 1997/07/08 18:20:12 curt
1124 // Working on establishing a hard ground.
1126 // Revision 1.27 1997/07/07 20:59:49 curt
1127 // Working on scenery transformations to enable us to fly fluidly over the
1128 // poles with no discontinuity/distortion in scenery.
1130 // Revision 1.26 1997/07/05 20:43:34 curt
1131 // renamed mat3 directory to Math so we could add other math related routines.
1133 // Revision 1.25 1997/06/29 21:19:17 curt
1134 // Working on scenery management system.
1136 // Revision 1.24 1997/06/26 22:14:53 curt
1137 // Beginning work on a scenery management system.
1139 // Revision 1.23 1997/06/26 19:08:33 curt
1140 // Restructuring make, adding automatic "make dep" support.
1142 // Revision 1.22 1997/06/25 15:39:47 curt
1143 // Minor changes to compile with rsxnt/win32.
1145 // Revision 1.21 1997/06/22 21:44:41 curt
1146 // Working on intergrating the VRML (subset) parser.
1148 // Revision 1.20 1997/06/21 17:12:53 curt
1149 // Capitalized subdirectory names.
1151 // Revision 1.19 1997/06/18 04:10:31 curt
1152 // A couple more runway tweaks ...
1154 // Revision 1.18 1997/06/18 02:21:24 curt
1155 // Hacked in a runway
1157 // Revision 1.17 1997/06/17 16:51:58 curt
1158 // Timer interval stuff now uses gettimeofday() instead of ftime()
1160 // Revision 1.16 1997/06/17 04:19:16 curt
1161 // More timer related tweaks with respect to view direction changes.
1163 // Revision 1.15 1997/06/17 03:41:10 curt
1164 // Nonsignal based interval timing is now working.
1165 // This would be a good time to look at cleaning up the code structure a bit.
1167 // Revision 1.14 1997/06/16 19:32:51 curt
1168 // Starting to add general timer support.
1170 // Revision 1.13 1997/06/02 03:40:06 curt
1171 // A tiny bit more view tweaking.
1173 // Revision 1.12 1997/06/02 03:01:38 curt
1174 // Working on views (side, front, back, transitions, etc.)
1176 // Revision 1.11 1997/05/31 19:16:25 curt
1177 // Elevator trim added.
1179 // Revision 1.10 1997/05/31 04:13:52 curt
1180 // WE CAN NOW FLY!!!
1182 // Continuing work on the LaRCsim flight model integration.
1183 // Added some MSFS-like keyboard input handling.
1185 // Revision 1.9 1997/05/30 19:27:01 curt
1186 // The LaRCsim flight model is starting to look like it is working.
1188 // Revision 1.8 1997/05/30 03:54:10 curt
1189 // Made a bit more progress towards integrating the LaRCsim flight model.
1191 // Revision 1.7 1997/05/29 22:39:49 curt
1192 // Working on incorporating the LaRCsim flight model.
1194 // Revision 1.6 1997/05/29 12:31:39 curt
1195 // Minor tweaks, moving towards general flight model integration.
1197 // Revision 1.5 1997/05/29 02:33:23 curt
1198 // Updated to reflect changing interfaces in other "modules."
1200 // Revision 1.4 1997/05/27 17:44:31 curt
1201 // Renamed & rearranged variables and routines. Added some initial simple
1202 // timer/alarm routines so the flight model can be updated on a regular
1205 // Revision 1.3 1997/05/23 15:40:25 curt
1206 // Added GNU copyright headers.
1209 // Revision 1.2 1997/05/23 00:35:12 curt
1210 // Trying to get fog to work ...
1212 // Revision 1.1 1997/05/21 15:57:51 curt
1213 // Renamed due to added GLUT support.
1215 // Revision 1.3 1997/05/19 18:22:42 curt
1216 // Parameter tweaking ... starting to stub in fog support.
1218 // Revision 1.2 1997/05/17 00:17:34 curt
1219 // Trying to stub in support for standard OpenGL.
1221 // Revision 1.1 1997/05/16 16:05:52 curt
1222 // Initial revision.