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 <Debug/fg_debug.h>
44 #include <Main/GLUTkey.h>
45 #include <Main/fg_init.h>
46 #include <Main/fg_getopt.h>
47 #include <Main/views.h>
49 #include <Include/cmdargs.h> // Line to command line arguments
50 #include <Include/fg_constants.h> // for VERSION
51 #include <Include/general.h>
53 #include <Aircraft/aircraft.h>
54 #include <Astro/moon.h>
55 #include <Astro/planets.h>
56 #include <Astro/sky.h>
57 #include <Astro/stars.h>
58 #include <Astro/sun.h>
59 #include <Cockpit/cockpit.h>
60 #include <Joystick/joystick.h>
61 #include <Math/fg_geodesy.h>
62 #include <Math/mat3.h>
63 #include <Math/polar.h>
64 #include <Scenery/scenery.h>
65 #include <Scenery/tilemgr.h>
66 #include <Time/event.h>
67 #include <Time/fg_time.h>
68 #include <Time/fg_timer.h>
69 #include <Time/sunpos.h>
70 #include <Weather/weather.h>
73 // This is a record containing global housekeeping information
77 static GLfloat win_ratio = 1.0;
78 static GLint winWidth, winHeight;
83 // Yet another hack. This one used by the HUD code. Michele
86 // Yet another other hack. Used for my prototype instrument code. (Durk)
87 int displayInstruments;
89 // The following defines flight gear options. Because glutlib will also
90 // want to parse its own options, those options must not be included here
91 // or they will get parsed by the main program option parser. Hence case
92 // is significant for any option added that might be in conflict with
95 // glutlib parses for:
97 // -direct (invalid in Win32)
101 // -indirect (invalid in Win32)
104 // Note that glutlib depends upon strings while this program's
105 // option parser wants only initial characters followed by numbers
108 const char *fg_cmdargopts = "a:c:Hhp:r:v:x:?";
111 // -a aircraftfilename aircraft start over ride
112 // -c0x0000 - 0xffffffff debug class setting
113 // H,h.? help on command line use (does not need Option struct)
115 // -r flightgear root path to program support files
116 // -v0 -v1 initial view mode (hud/no_hud currently)
117 // -xlogpathname debug logfile name
119 // Defaults in arguments to indicate not set on command line.
120 // Program defaults set variables from constants if neither command
121 // options or environmental variables effect values.
124 char acArgbuf [ MAXPATH + 1] = "\0";
125 int debugArgValue = -2;
126 int priorityArgValue = -1;
127 char rootArgbuf [ MAXPATH + 1] = "\0";
129 char logArgbuf [ MAXPATH + 1] = "\0";
131 // There is a reason for defining the option structs by name and then
132 // creating an array of pointers to options. C++ is unfriendly to
133 // initializing arrays of objects that are not built in types. Always
134 // look forward. (Besides, you can follow what is going on better and
135 // add or modify with greater security. -ch
137 Option aircraftOption = { 'a',
140 "Startup aircraft pathname override"
142 Option debugOption = { 'c',
143 OPT_LHEX, // Long int (32 bits)
147 Option priorityOption = { 'p',
150 "Debug priority Threshold"
152 Option rootOption = { 'r',
155 "Root directory for execution"
157 Option hudOption = { 'v',
160 "View mode start" // Naked,HUD,Panel,Chase,Tower...
163 // Only naked view and HUD are implemented at this time
164 Option logfileOption = { 'x',
167 "Debug log file name"
170 #define OptsDefined 6
171 Option *CmdLineOptions[ OptsDefined ] = {
180 const char *DefaultRootDir = "\\Flightgear";
181 const char *DefaultAircraft = "Navion.acf";
182 const char *DefaultDebuglog = "fgdebug.log";
183 const int DefaultViewMode = HUD_VIEW;
185 // Debug defaults handled in fg_debug.c
187 // fgInitVisuals() -- Initialize various GL/view parameters
188 static void fgInitVisuals( void ) {
192 l = &cur_light_params;
193 w = ¤t_weather;
195 // xglDisable( GL_DITHER );
197 // If enabled, normal vectors specified with glNormal are scaled
198 // to unit length after transformation. See glNormal.
199 xglEnable( GL_NORMALIZE );
201 xglEnable( GL_LIGHTING );
202 xglEnable( GL_LIGHT0 );
203 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
205 xglFogi (GL_FOG_MODE, GL_LINEAR);
206 xglFogf (GL_FOG_START, 10.0);
207 xglFogf (GL_FOG_END, w->visibility);
208 // xglFogf (GL_FOG_DENSITY, w->visibility);
209 xglHint (GL_FOG_HINT, GL_NICEST /* GL_FASTEST */ );
212 // xglPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
216 // Update the view volume, position, and orientation
217 static void fgUpdateViewParams( void ) {
223 f = current_aircraft.flight;
224 l = &cur_light_params;
225 // t = &cur_time_params;
228 fgViewUpdate(f, v, l);
230 if (displayInstruments) {
231 xglViewport( 0, (GLint)(winHeight / 2 ) ,
232 (GLint)winWidth, (GLint)winHeight / 2 );
233 // Tell GL we are about to modify the projection parameters
234 xglMatrixMode(GL_PROJECTION);
236 gluPerspective(65.0, 2.0/win_ratio, 1.0, 100000.0);
238 xglViewport(0, 0 , (GLint)winWidth, (GLint) winHeight);
239 // Tell GL we are about to modify the projection parameters
240 xglMatrixMode(GL_PROJECTION);
242 gluPerspective(65.0, 1.0/win_ratio, 10.0, 100000.0);
245 xglMatrixMode(GL_MODELVIEW);
248 // set up our view volume (default)
249 gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
250 v->view_pos.x + v->view_forward[0],
251 v->view_pos.y + v->view_forward[1],
252 v->view_pos.z + v->view_forward[2],
253 v->view_up[0], v->view_up[1], v->view_up[2]);
255 // look almost straight up (testing and eclipse watching)
256 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
257 v->view_pos.x + v->view_up[0] + .001,
258 v->view_pos.y + v->view_up[1] + .001,
259 v->view_pos.z + v->view_up[2] + .001,
260 v->view_up[0], v->view_up[1], v->view_up[2]); */
262 // lock view horizontally towards sun (testing)
263 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
264 v->view_pos.x + v->surface_to_sun[0],
265 v->view_pos.y + v->surface_to_sun[1],
266 v->view_pos.z + v->surface_to_sun[2],
267 v->view_up[0], v->view_up[1], v->view_up[2]); */
269 // lock view horizontally towards south (testing)
270 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
271 v->view_pos.x + v->surface_south[0],
272 v->view_pos.y + v->surface_south[1],
273 v->view_pos.z + v->surface_south[2],
274 v->view_up[0], v->view_up[1], v->view_up[2]); */
276 // set the sun position
277 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
281 // Draw a basic instrument panel
282 static void fgUpdateInstrViewParams( void ) {
283 xglViewport(0, 0 , (GLint)winWidth, (GLint)winHeight / 2);
285 xglMatrixMode(GL_PROJECTION);
289 gluOrtho2D(0, 640, 0, 480);
290 xglMatrixMode(GL_MODELVIEW);
294 xglColor3f(1.0, 1.0, 1.0);
297 xglDisable(GL_DEPTH_TEST);
298 xglDisable(GL_LIGHTING);
301 xglColor3f (0.5, 0.5, 0.5);
304 xglVertex2f(0.0, 0.00);
305 xglVertex2f(0.0, 480.0);
306 xglVertex2f(640.0,480.0);
307 xglVertex2f(640.0, 0.0);
310 xglRectf(0.0,0.0, 640, 480);
311 xglEnable(GL_DEPTH_TEST);
312 xglEnable(GL_LIGHTING);
313 xglMatrixMode(GL_PROJECTION);
315 xglMatrixMode(GL_MODELVIEW);
320 // Update all Visuals (redraws anything graphics related)
321 static void fgRenderFrame( void ) {
326 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
327 GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
329 l = &cur_light_params;
330 t = &cur_time_params;
333 // update view volume parameters
334 fgUpdateViewParams();
336 xglClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
338 // Tell GL we are switching to model view parameters
339 xglMatrixMode(GL_MODELVIEW);
340 // xglLoadIdentity();
343 xglDisable( GL_DEPTH_TEST );
344 xglDisable( GL_LIGHTING );
345 xglDisable( GL_CULL_FACE );
346 xglDisable( GL_FOG );
347 xglShadeModel( GL_SMOOTH );
350 // setup transformation for drawing astronomical objects
352 // Translate to view position
353 xglTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
354 // Rotate based on gst (sidereal time)
355 angle = t->gst * 15.041085; /* should be 15.041085, Curt thought it was 15*/
356 // printf("Rotating astro objects by %.2f degrees\n",angle);
357 xglRotatef( angle, 0.0, 0.0, -1.0 );
359 // draw stars and planets
367 xglEnable( GL_LIGHTING );
368 // set lighting parameters
369 xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
370 xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
371 xglEnable( GL_CULL_FACE );
373 // Let's try some blending technique's (Durk)
375 glBlendFunc(GL_ONE, GL_ONE);
382 xglShadeModel( /* GL_FLAT */ GL_SMOOTH );
383 xglEnable( GL_DEPTH_TEST );
385 xglFogfv (GL_FOG_COLOR, l->fog_color);
386 // set lighting parameters
387 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
388 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
389 // texture parameters
390 xglEnable( GL_TEXTURE_2D ); /* xglDisable( GL_TEXTURE_2D ); */
391 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ) ;
392 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT ) ;
393 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ) ;
394 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
395 GL_LINEAR /* GL_LINEAR_MIPMAP_LINEAR */ ) ;
396 xglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
397 xglHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
398 // set base color (I don't think this is doing anything here)
403 xglDisable( GL_TEXTURE_2D );
410 // display instruments
411 if (displayInstruments) {
412 fgUpdateInstrViewParams();
419 // Update internal time dependent calculations (i.e. flight model)
420 void fgUpdateTimeDepCalcs(int multi_loop) {
426 f = current_aircraft.flight;
427 t = &cur_time_params;
430 // update the flight model
431 if ( multi_loop < 0 ) {
432 multi_loop = DEFAULT_MULTILOOP;
435 // printf("updating flight model x %d\n", multi_loop);
436 fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
438 // update the view angle
439 for ( i = 0; i < multi_loop; i++ ) {
440 if ( fabs(v->goal_view_offset - v->view_offset) < 0.05 ) {
441 v->view_offset = v->goal_view_offset;
444 // move v->view_offset towards v->goal_view_offset
445 if ( v->goal_view_offset > v->view_offset ) {
446 if ( v->goal_view_offset - v->view_offset < FG_PI ) {
447 v->view_offset += 0.01;
449 v->view_offset -= 0.01;
452 if ( v->view_offset - v->goal_view_offset < FG_PI ) {
453 v->view_offset -= 0.01;
455 v->view_offset += 0.01;
458 if ( v->view_offset > FG_2PI ) {
459 v->view_offset -= FG_2PI;
460 } else if ( v->view_offset < 0 ) {
461 v->view_offset += FG_2PI;
468 void fgInitTimeDepCalcs( void ) {
471 #ifdef HAVE_SETITIMER
472 fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
473 #endif HAVE_SETITIMER
478 // Scenery management routines
480 /* static void fgSceneryInit_OLD() { */
482 /* scenery = fgSceneryCompile_OLD();
483 runway = fgRunwayHack_OLD(0.69, 53.07);
487 /* create the scenery */
488 /* GLint fgSceneryCompile_OLD() {
491 scenery = mesh2GL(mesh_ptr_OLD);
497 /* hack in a runway */
498 /* GLint fgRunwayHack_OLD(double width, double length) {
499 static GLfloat concrete[4] = { 0.5, 0.5, 0.5, 1.0 };
500 static GLfloat line[4] = { 0.9, 0.9, 0.9, 1.0 };
503 float line_len, line_width_2, cur_pos;
505 runway = xglGenLists(1);
506 xglNewList(runway, GL_COMPILE);
509 /* xglBegin(GL_POLYGON);
510 xglMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, concrete );
511 xglNormal3f(0.0, 0.0, 1.0);
513 xglVertex3d( 0.0, -width/2.0, 0.0);
514 xglVertex3d( 0.0, width/2.0, 0.0);
515 xglVertex3d(length, width/2.0, 0.0);
516 xglVertex3d(length, -width/2.0, 0.0);
519 /* draw center line */
520 /* xglMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, line );
521 line_len = length / ( 2 * num_lines + 1);
522 printf("line_len = %.3f\n", line_len);
525 for ( i = 0; i < num_lines; i++ ) {
526 xglBegin(GL_POLYGON);
527 xglVertex3d( cur_pos, -line_width_2, 0.005);
528 xglVertex3d( cur_pos, line_width_2, 0.005);
530 xglVertex3d( cur_pos, line_width_2, 0.005);
531 xglVertex3d( cur_pos, -line_width_2, 0.005);
542 /* draw the scenery */
543 /*static void fgSceneryDraw_OLD() {
544 static float z = 32.35;
548 xglCallList(scenery);
550 printf("*** Drawing runway at %.2f\n", z);
552 xglTranslatef( -398391.28, 120070.41, 32.35);
553 xglRotatef(170.0, 0.0, 0.0, 1.0);
561 // What should we do when we have nothing else to do? How about get
562 // ready for the next move and update the display?
563 static void fgMainLoop( void ) {
564 static int remainder = 0;
565 int elapsed, multi_loop;
567 // double joy_x, joy_y;
568 // int joy_b1, joy_b2;
573 fgPrintf( FG_ALL, FG_DEBUG, "Running Main Loop\n");
574 fgPrintf( FG_ALL, FG_DEBUG, "======= ==== ====\n");
576 a = ¤t_aircraft;
578 t = &cur_time_params;
584 /* fgJoystickRead( &joy_x, &joy_y, &joy_b1, &joy_b2 );
585 printf( "Joystick X %f Y %f B1 %d B2 %d\n",
586 joy_x, joy_y, joy_b1, joy_b2 );
588 fgAileronSet( joy_x ); */
590 // Calculate model iterations needed
591 elapsed = fgGetTimeInterval();
592 fgPrintf( FG_ALL, FG_BULK,
593 "Time interval is = %d, previous remainder is = %d\n",
595 fgPrintf( FG_ALL, FG_BULK,
596 "--> Frame rate is = %.2f\n", 1000.0 / (float)elapsed);
597 elapsed += remainder;
599 multi_loop = (int)(((float)elapsed * 0.001) * DEFAULT_MODEL_HZ);
600 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
601 fgPrintf( FG_ALL, FG_BULK,
602 "Model iterations needed = %d, new remainder = %d\n",
603 multi_loop, remainder);
606 if ( ! use_signals ) {
608 fgUpdateTimeDepCalcs(multi_loop);
611 // I'm just sticking this here for now, it should probably move
613 /* cur_elev = mesh_altitude(FG_Longitude * RAD_TO_ARCSEC,
614 FG_Latitude * RAD_TO_ARCSEC); */
615 // there is no ground collision detection really, so for now I
616 // just hard code the ground elevation to be 0 */
619 // printf("Ground elevation is %.2f meters here.\n", cur_elev);
620 // FG_Runway_altitude = cur_elev * METER_TO_FEET;
622 if ( FG_Altitude * FEET_TO_METER < cur_elev + 3.758099) {
623 // set this here, otherwise if we set runway height above our
624 // current height we get a really nasty bounce.
625 FG_Runway_altitude = FG_Altitude - 3.758099;
627 // now set aircraft altitude above ground
628 FG_Altitude = cur_elev * METER_TO_FEET + 3.758099;
629 fgPrintf( FG_ALL, FG_BULK, "<*> resetting altitude to %.0f meters\n",
630 FG_Altitude * FEET_TO_METER);
633 fgAircraftOutputCurrent(a);
635 // see if we need to load any new scenery tiles
638 // Process/manage pending events
644 fgPrintf( FG_ALL, FG_DEBUG, "\n");
648 // Handle new window size or exposure
649 static void fgReshape( int width, int height ) {
650 // Do this so we can call fgReshape(0,0) ourselves without having
651 // to know what the values of width & height are.
652 if ( (height > 0) && (width > 0) ) {
653 win_ratio = (GLfloat) height / (GLfloat) width;
659 // Inform gl of our view window size (now handled elsewhere)
660 // xglViewport(0, 0, (GLint)width, (GLint)height);
661 fgUpdateViewParams();
663 // xglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
668 int main( int argc, char *argv[] ) {
670 int parse_result; // Used in command line argument.
672 f = current_aircraft.flight;
673 // First things first... We must have startup options dealt with.
675 printf("Flight Gear: Version %s\n\n", VERSION);
677 // Initialize the Window/Graphics environment.
680 xglutInit(&argc, argv);
682 // Define Display Parameters
683 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
685 // Define initial window size
686 xglutInitWindowSize(640, 480);
688 // Initialize windows
689 xglutCreateWindow("Flight Gear");
691 // xglutInit above will extract all non-general program command line.
692 // We only need wory about our own.
694 parse_result = getargs( argc, argv, OptsDefined, CmdLineOptions, NULL);
696 switch( parse_result ) {
701 print_desc( OptsDefined, CmdLineOptions );
706 printf( "Flight Gear: Command line invalid.");
710 // Deal with the effects of options no set by manipulating the command
711 // line, or possibly set to invalid states.
713 if(( viewArg >= 0) && (viewArg <= 1)) {
714 show_hud = viewArg; // For now view_mode TRUE - no HUD, else show_hud.
716 show_hud = DefaultViewMode;
719 // All other command line option responses are handled in the various
720 // initialization routines (or ignored if not implemented.
722 // This is the general house keeping init routine. It initializes the
723 // debug trail scheme and then any other stuff.
725 if( !fgInitGeneral()) {
727 // This is the top level init routine which calls all the other
728 // subsystem initialization routines. If you are adding a
729 // subsystem to flight gear, its initialization call should
730 // located in this routine.
731 if( !fgInitSubsystems()) {
733 // setup view parameters, only makes GL calls
737 // init timer routines, signals, etc. Arrange for an
738 // alarm signal to be generated, etc.
739 fgInitTimeDepCalcs();
742 // Initialize the GLUT Event Handlers.
744 // call fgReshape() on window resizes
745 xglutReshapeFunc( fgReshape );
747 // call key() on keyboard event
748 xglutKeyboardFunc( GLUTkey );
749 glutSpecialFunc( GLUTspecialkey );
751 // call fgMainLoop() whenever there is
752 // nothing else to do
753 xglutIdleFunc( fgMainLoop );
756 xglutDisplayFunc( fgRenderFrame );
758 // pass control off to the GLUT event handler
761 } // End if subsystems initialize ok
762 } // End if general initializations went ok
764 if( fg_DebugOutput ) {
765 fclose( fg_DebugOutput );
773 void __eprintf( void ) {
780 // Revision 1.1 1998/04/21 17:02:39 curt
781 // Prepairing for C++ integration.
783 // Revision 1.71 1998/04/18 04:11:26 curt
784 // Moved fg_debug to it's own library, added zlib support.
786 // Revision 1.70 1998/04/14 02:21:02 curt
787 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
788 // <jgoeke@voyager.net>
790 // Revision 1.69 1998/04/08 23:35:34 curt
791 // Tweaks to Gnu automake/autoconf system.
793 // Revision 1.68 1998/04/03 22:09:03 curt
794 // Converting to Gnu autoconf system.
796 // Revision 1.67 1998/03/23 21:24:37 curt
797 // Source code formating tweaks.
799 // Revision 1.66 1998/03/14 00:31:20 curt
800 // Beginning initial terrain texturing experiments.
802 // Revision 1.65 1998/03/09 22:45:57 curt
803 // Minor tweaks for building on sparc platform.
805 // Revision 1.64 1998/02/20 00:16:23 curt
806 // Thursday's tweaks.
808 // Revision 1.63 1998/02/16 16:17:39 curt
811 // Revision 1.62 1998/02/16 13:39:42 curt
812 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
813 // tiles to occasionally be missing.
815 // Revision 1.61 1998/02/12 21:59:46 curt
816 // Incorporated code changes contributed by Charlie Hotchkiss
817 // <chotchkiss@namg.us.anritsu.com>
819 // Revision 1.60 1998/02/11 02:50:40 curt
822 // Revision 1.59 1998/02/09 22:56:54 curt
823 // Removed "depend" files from cvs control. Other minor make tweaks.
825 // Revision 1.58 1998/02/09 15:07:49 curt
828 // Revision 1.57 1998/02/07 15:29:40 curt
829 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
830 // <chotchkiss@namg.us.anritsu.com>
832 // Revision 1.56 1998/02/03 23:20:23 curt
833 // Lots of little tweaks to fix various consistency problems discovered by
834 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
835 // passed arguments along to the real printf(). Also incorporated HUD changes
836 // by Michele America.
838 // Revision 1.55 1998/02/02 20:53:58 curt
839 // Incorporated Durk's changes.
841 // Revision 1.54 1998/01/31 00:43:10 curt
842 // Added MetroWorks patches from Carmen Volpe.
844 // Revision 1.53 1998/01/27 18:35:54 curt
847 // Revision 1.52 1998/01/27 00:47:56 curt
848 // Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
849 // system and commandline/config file processing code.
851 // Revision 1.51 1998/01/26 15:57:05 curt
852 // Tweaks for dynamic scenery development.
854 // Revision 1.50 1998/01/19 19:27:07 curt
855 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
856 // This should simplify things tremendously.
858 // Revision 1.49 1998/01/19 18:40:31 curt
859 // Tons of little changes to clean up the code and to remove fatal errors
860 // when building with the c++ compiler.
862 // Revision 1.48 1998/01/19 18:35:46 curt
863 // Minor tweaks and fixes for cygwin32.
865 // Revision 1.47 1998/01/13 00:23:08 curt
866 // Initial changes to support loading and management of scenery tiles. Note,
867 // there's still a fair amount of work left to be done.
869 // Revision 1.46 1998/01/08 02:22:06 curt
870 // Beginning to integrate Tile management subsystem.
872 // Revision 1.45 1998/01/07 03:18:55 curt
873 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
875 // Revision 1.44 1997/12/30 22:22:31 curt
876 // Further integration of event manager.
878 // Revision 1.43 1997/12/30 20:47:43 curt
879 // Integrated new event manager with subsystem initializations.
881 // Revision 1.42 1997/12/30 16:36:47 curt
882 // Merged in Durk's changes ...
884 // Revision 1.41 1997/12/30 13:06:56 curt
885 // A couple lighting tweaks ...
887 // Revision 1.40 1997/12/30 01:38:37 curt
888 // Switched back to per vertex normals and smooth shading for terrain.
890 // Revision 1.39 1997/12/22 23:45:45 curt
891 // First stab at sunset/sunrise sky glow effects.
893 // Revision 1.38 1997/12/22 04:14:28 curt
894 // Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
896 // Revision 1.37 1997/12/19 23:34:03 curt
897 // Lot's of tweaking with sky rendering and lighting.
899 // Revision 1.36 1997/12/19 16:44:57 curt
900 // Working on scene rendering order and options.
902 // Revision 1.35 1997/12/18 23:32:32 curt
903 // First stab at sky dome actually starting to look reasonable. :-)
905 // Revision 1.34 1997/12/17 23:13:34 curt
906 // Began working on rendering a sky.
908 // Revision 1.33 1997/12/15 23:54:45 curt
909 // Add xgl wrappers for debugging.
910 // Generate terrain normals on the fly.
912 // Revision 1.32 1997/12/15 20:59:08 curt
915 // Revision 1.31 1997/12/12 21:41:25 curt
916 // More light/material property tweaking ... still a ways off.
918 // Revision 1.30 1997/12/12 19:52:47 curt
919 // Working on lightling and material properties.
921 // Revision 1.29 1997/12/11 04:43:54 curt
922 // Fixed sun vector and lighting problems. I thing the moon is now lit
925 // Revision 1.28 1997/12/10 22:37:45 curt
926 // Prepended "fg" on the name of all global structures that didn't have it yet.
927 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
929 // Revision 1.27 1997/12/09 05:11:54 curt
930 // Working on tweaking lighting.
932 // Revision 1.26 1997/12/09 04:25:29 curt
933 // Working on adding a global lighting params structure.
935 // Revision 1.25 1997/12/08 22:54:09 curt
936 // Enabled GL_CULL_FACE.
938 // Revision 1.24 1997/11/25 19:25:32 curt
939 // Changes to integrate Durk's moon/sun code updates + clean up.
941 // Revision 1.23 1997/11/15 18:16:34 curt
944 // Revision 1.22 1997/10/30 12:38:41 curt
945 // Working on new scenery subsystem.
947 // Revision 1.21 1997/09/23 00:29:38 curt
948 // Tweaks to get things to compile with gcc-win32.
950 // Revision 1.20 1997/09/22 14:44:19 curt
951 // Continuing to try to align stars correctly.
953 // Revision 1.19 1997/09/18 16:20:08 curt
954 // At dusk/dawn add/remove stars in stages.
956 // Revision 1.18 1997/09/16 22:14:51 curt
957 // Tweaked time of day lighting equations. Don't draw stars during the day.
959 // Revision 1.17 1997/09/16 15:50:29 curt
960 // Working on star alignment and time issues.
962 // Revision 1.16 1997/09/13 02:00:06 curt
963 // Mostly working on stars and generating sidereal time for accurate star
966 // Revision 1.15 1997/09/05 14:17:27 curt
967 // More tweaking with stars.
969 // Revision 1.14 1997/09/05 01:35:53 curt
970 // Working on getting stars right.
972 // Revision 1.13 1997/09/04 02:17:34 curt
975 // Revision 1.12 1997/08/27 21:32:24 curt
976 // Restructured view calculation code. Added stars.
978 // Revision 1.11 1997/08/27 03:30:16 curt
979 // Changed naming scheme of basic shared structures.
981 // Revision 1.10 1997/08/25 20:27:22 curt
982 // Merged in initial HUD and Joystick code.
984 // Revision 1.9 1997/08/22 21:34:39 curt
985 // Doing a bit of reorganizing and house cleaning.
987 // Revision 1.8 1997/08/19 23:55:03 curt
988 // Worked on better simulating real lighting.
990 // Revision 1.7 1997/08/16 12:22:38 curt
991 // Working on improving the lighting/shading.
993 // Revision 1.6 1997/08/13 20:24:56 curt
994 // Changes due to changing sunpos interface.
996 // Revision 1.5 1997/08/06 21:08:32 curt
997 // Sun position now//really* works (I think) ... I still have sun time warping
998 // code in place, probably should remove it soon.
1000 // Revision 1.4 1997/08/06 15:41:26 curt
1001 // Working on correct sun position.
1003 // Revision 1.3 1997/08/06 00:24:22 curt
1004 // Working on correct real time sun lighting.
1006 // Revision 1.2 1997/08/04 20:25:15 curt
1007 // Organizational tweaking.
1009 // Revision 1.1 1997/08/02 18:45:00 curt
1010 // Renamed GLmain.c GLUTmain.c
1012 // Revision 1.43 1997/08/02 16:23:47 curt
1015 // Revision 1.42 1997/08/01 19:43:33 curt
1016 // Making progress with coordinate system overhaul.
1018 // Revision 1.41 1997/07/31 22:52:37 curt
1019 // Working on redoing internal coordinate systems & scenery transformations.
1021 // Revision 1.40 1997/07/30 16:12:42 curt
1022 // Moved fg_random routines from Util/ to Math/
1024 // Revision 1.39 1997/07/21 14:45:01 curt
1027 // Revision 1.38 1997/07/19 23:04:47 curt
1028 // Added an initial weather section.
1030 // Revision 1.37 1997/07/19 22:34:02 curt
1031 // Moved PI definitions to ../constants.h
1032 // Moved random() stuff to ../Utils/ and renamed fg_random()
1034 // Revision 1.36 1997/07/18 23:41:25 curt
1035 // Tweaks for building with Cygnus Win32 compiler.
1037 // Revision 1.35 1997/07/18 14:28:34 curt
1038 // Hacked in some support for wind/turbulence.
1040 // Revision 1.34 1997/07/16 20:04:48 curt
1041 // Minor tweaks to aid Win32 port.
1043 // Revision 1.33 1997/07/12 03:50:20 curt
1044 // Added an #include <Windows32/Base.h> to help compiling for Win32
1046 // Revision 1.32 1997/07/11 03:23:18 curt
1047 // Solved some scenery display/orientation problems. Still have a positioning
1048 // (or transformation?) problem.
1050 // Revision 1.31 1997/07/11 01:29:58 curt
1051 // More tweaking of terrian floor.
1053 // Revision 1.30 1997/07/10 04:26:37 curt
1054 // We now can interpolated ground elevation for any position in the grid. We
1055 // can use this to enforce a "hard" ground. We still need to enforce some
1056 // bounds checking so that we don't try to lookup data points outside the
1059 // Revision 1.29 1997/07/09 21:31:12 curt
1060 // Working on making the ground "hard."
1062 // Revision 1.28 1997/07/08 18:20:12 curt
1063 // Working on establishing a hard ground.
1065 // Revision 1.27 1997/07/07 20:59:49 curt
1066 // Working on scenery transformations to enable us to fly fluidly over the
1067 // poles with no discontinuity/distortion in scenery.
1069 // Revision 1.26 1997/07/05 20:43:34 curt
1070 // renamed mat3 directory to Math so we could add other math related routines.
1072 // Revision 1.25 1997/06/29 21:19:17 curt
1073 // Working on scenery management system.
1075 // Revision 1.24 1997/06/26 22:14:53 curt
1076 // Beginning work on a scenery management system.
1078 // Revision 1.23 1997/06/26 19:08:33 curt
1079 // Restructuring make, adding automatic "make dep" support.
1081 // Revision 1.22 1997/06/25 15:39:47 curt
1082 // Minor changes to compile with rsxnt/win32.
1084 // Revision 1.21 1997/06/22 21:44:41 curt
1085 // Working on intergrating the VRML (subset) parser.
1087 // Revision 1.20 1997/06/21 17:12:53 curt
1088 // Capitalized subdirectory names.
1090 // Revision 1.19 1997/06/18 04:10:31 curt
1091 // A couple more runway tweaks ...
1093 // Revision 1.18 1997/06/18 02:21:24 curt
1094 // Hacked in a runway
1096 // Revision 1.17 1997/06/17 16:51:58 curt
1097 // Timer interval stuff now uses gettimeofday() instead of ftime()
1099 // Revision 1.16 1997/06/17 04:19:16 curt
1100 // More timer related tweaks with respect to view direction changes.
1102 // Revision 1.15 1997/06/17 03:41:10 curt
1103 // Nonsignal based interval timing is now working.
1104 // This would be a good time to look at cleaning up the code structure a bit.
1106 // Revision 1.14 1997/06/16 19:32:51 curt
1107 // Starting to add general timer support.
1109 // Revision 1.13 1997/06/02 03:40:06 curt
1110 // A tiny bit more view tweaking.
1112 // Revision 1.12 1997/06/02 03:01:38 curt
1113 // Working on views (side, front, back, transitions, etc.)
1115 // Revision 1.11 1997/05/31 19:16:25 curt
1116 // Elevator trim added.
1118 // Revision 1.10 1997/05/31 04:13:52 curt
1119 // WE CAN NOW FLY!!!
1121 // Continuing work on the LaRCsim flight model integration.
1122 // Added some MSFS-like keyboard input handling.
1124 // Revision 1.9 1997/05/30 19:27:01 curt
1125 // The LaRCsim flight model is starting to look like it is working.
1127 // Revision 1.8 1997/05/30 03:54:10 curt
1128 // Made a bit more progress towards integrating the LaRCsim flight model.
1130 // Revision 1.7 1997/05/29 22:39:49 curt
1131 // Working on incorporating the LaRCsim flight model.
1133 // Revision 1.6 1997/05/29 12:31:39 curt
1134 // Minor tweaks, moving towards general flight model integration.
1136 // Revision 1.5 1997/05/29 02:33:23 curt
1137 // Updated to reflect changing interfaces in other "modules."
1139 // Revision 1.4 1997/05/27 17:44:31 curt
1140 // Renamed & rearranged variables and routines. Added some initial simple
1141 // timer/alarm routines so the flight model can be updated on a regular
1144 // Revision 1.3 1997/05/23 15:40:25 curt
1145 // Added GNU copyright headers.
1148 // Revision 1.2 1997/05/23 00:35:12 curt
1149 // Trying to get fog to work ...
1151 // Revision 1.1 1997/05/21 15:57:51 curt
1152 // Renamed due to added GLUT support.
1154 // Revision 1.3 1997/05/19 18:22:42 curt
1155 // Parameter tweaking ... starting to stub in fog support.
1157 // Revision 1.2 1997/05/17 00:17:34 curt
1158 // Trying to stub in support for standard OpenGL.
1160 // Revision 1.1 1997/05/16 16:05:52 curt
1161 // Initial revision.