1 /**************************************************************************
2 * GLUTmain.c -- 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)
24 **************************************************************************/
41 #include <Main/GLUTkey.h>
42 #include <Main/fg_init.h>
43 #include <Main/fg_debug.h>
44 #include <Main/fg_getopt.h>
45 #include <Main/views.h>
47 #include <Include/cmdargs.h> // Line to command line arguments
48 #include <Include/fg_constants.h>
49 #include <Include/general.h>
51 #include <Aircraft/aircraft.h>
52 #include <Astro/moon.h>
53 #include <Astro/planets.h>
54 #include <Astro/sky.h>
55 #include <Astro/stars.h>
56 #include <Astro/sun.h>
57 #include <Cockpit/cockpit.h>
58 #include <Joystick/joystick.h>
59 #include <Math/fg_geodesy.h>
60 #include <Math/mat3.h>
61 #include <Math/polar.h>
62 #include <Scenery/scenery.h>
63 #include <Scenery/tilemgr.h>
64 #include <Time/event.h>
65 #include <Time/fg_time.h>
66 #include <Time/fg_timer.h>
67 #include <Time/sunpos.h>
68 #include <Weather/weather.h>
71 /* This is a record containing global housekeeping information */
72 struct fgGENERAL general;
75 static GLfloat win_ratio = 1.0;
76 static GLint winWidth, winHeight;
79 /* pointer to scenery structure */
80 /* static GLint scenery, runway; */
87 /* Yet another hack. This one used by the HUD code. Michele */
90 /* Yet another other hack. Used for my prototype instrument code. (Durk) */
91 int displayInstruments;
93 // The following defines flight gear options. Because glutlib will also
94 // want to parse its own options, those options must not be included here
95 // or they will get parsed by the main program option parser. Hence case
96 // is significant for any option added that might be in conflict with
99 // glutlib parses for:
101 // -direct (invalid in Win32)
105 // -indirect (invalid in Win32)
108 // Note that glutlib depends upon strings while this program's
109 // option parser wants only initial characters followed by numbers
112 const char *fg_cmdargopts = "a:c:Hhp:r:v:x:?";
115 // -a aircraftfilename aircraft start over ride
116 // -c0x0000 - 0xffffffff debug class setting
117 // H,h.? help on command line use (does not need Option struct)
119 // -r flightgear root path to program support files
120 // -v0 -v1 initial view mode (hud/no_hud currently)
121 // -xlogpathname debug logfile name
123 // Defaults in arguments to indicate not set on command line.
124 // Program defaults set variables from constants if neither command
125 // options or environmental variables effect values.
128 char acArgbuf [ MAXPATH + 1] = "\0";
129 int debugArgValue = -2;
130 int priorityArgValue = -1;
131 char rootArgbuf [ MAXPATH + 1] = "\0";
133 char logArgbuf [ MAXPATH + 1] = "\0";
135 // There is a reason for defining the option structs by name and then
136 // creating an array of pointers to options. C++ is unfriendly to
137 // initializing arrays of objects that are not built in types. Always
138 // look forward. (Besides, you can follow what is going on better and
139 // add or modify with greater security. -ch
141 Option aircraftOption = { 'a',
144 "Startup aircraft pathname override"
146 Option debugOption = { 'c',
147 OPT_LHEX, // Long int (32 bits)
151 Option priorityOption = { 'p',
154 "Debug priority Threshold"
156 Option rootOption = { 'r',
159 "Root directory for execution"
161 Option hudOption = { 'v',
164 "View mode start" // Naked,HUD,Panel,Chase,Tower...
167 // Only naked view and HUD are implemented at this time
169 Option logfileOption = { 'x',
172 "Debug log file name"
176 #define OptsDefined 6
177 Option *CmdLineOptions[ OptsDefined ] = {
186 const char *DefaultRootDir = "\\Flightgear";
187 const char *DefaultAircraft = "Navion.acf";
188 const char *DefaultDebuglog = "fgdebug.log";
189 const int DefaultViewMode = HUD_VIEW;
191 // Debug defaults handled in fg_debug.c
193 /**************************************************************************
194 * fgInitVisuals() -- Initialize various GL/view parameters
195 **************************************************************************/
197 static void fgInitVisuals( void ) {
201 l = &cur_light_params;
202 w = ¤t_weather;
204 /* xglDisable( GL_DITHER ); */
206 /* If enabled, normal vectors specified with glNormal are scaled
207 to unit length after transformation. See glNormal. */
208 xglEnable( GL_NORMALIZE );
210 xglEnable( GL_LIGHTING );
211 xglEnable( GL_LIGHT0 );
212 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
214 xglFogi (GL_FOG_MODE, GL_LINEAR);
215 /* xglFogf (GL_FOG_START, 1.0); */
216 xglFogf (GL_FOG_END, w->visibility);
217 /* xglFogf (GL_FOG_DENSITY, w->visibility); */
218 xglHint (GL_FOG_HINT, GL_NICEST /* GL_FASTEST */ );
220 /* draw wire frame */
221 /* xglPolygonMode(GL_FRONT_AND_BACK,GL_LINE); */
225 /**************************************************************************
226 * Update the view volume, position, and orientation
227 **************************************************************************/
229 static void fgUpdateViewParams( void ) {
235 f = current_aircraft.flight;
236 l = &cur_light_params;
237 // t = &cur_time_params;
240 fgViewUpdate(f, v, l);
242 if (displayInstruments)
244 xglViewport(0, (GLint)(winHeight / 2 ) , (GLint)winWidth, (GLint)winHeight / 2);
245 /* Tell GL we are about to modify the projection parameters */
246 xglMatrixMode(GL_PROJECTION);
248 gluPerspective(55.0, 2.0/win_ratio, 1.0, 100000.0);
252 xglViewport(0, 0 , (GLint)winWidth, (GLint) winHeight);
253 /* Tell GL we are about to modify the projection parameters */
254 xglMatrixMode(GL_PROJECTION);
256 gluPerspective(55.0, 1.0/win_ratio, 10.0, 100000.0);
259 xglMatrixMode(GL_MODELVIEW);
262 /* set up our view volume (default) */
263 gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
264 v->view_pos.x + v->view_forward[0],
265 v->view_pos.y + v->view_forward[1],
266 v->view_pos.z + v->view_forward[2],
267 v->view_up[0], v->view_up[1], v->view_up[2]);
269 /* lock view horizontally towards sun (testing) */
270 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
271 v->view_pos.x + v->surface_to_sun[0],
272 v->view_pos.y + v->surface_to_sun[1],
273 v->view_pos.z + v->surface_to_sun[2],
274 v->view_up[0], v->view_up[1], v->view_up[2]); */
276 /* lock view horizontally towards south (testing) */
277 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
278 v->view_pos.x + v->surface_south[0],
279 v->view_pos.y + v->surface_south[1],
280 v->view_pos.z + v->surface_south[2],
281 v->view_up[0], v->view_up[1], v->view_up[2]); */
283 /* set the sun position */
284 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
288 /*************************************************************************
289 * Draw a basic instrument panel
290 ************************************************************************/
291 static void fgUpdateInstrViewParams( void ) {
292 xglViewport(0, 0 , (GLint)winWidth, (GLint)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 /**************************************************************************
330 * Update all Visuals (redraws anything graphics related)
331 **************************************************************************/
333 static void fgRenderFrame( void ) {
338 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
340 l = &cur_light_params;
341 t = &cur_time_params;
344 /* update view volume parameters */
345 fgUpdateViewParams();
347 xglClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
349 /* Tell GL we are switching to model view parameters */
350 xglMatrixMode(GL_MODELVIEW);
351 /* xglLoadIdentity(); */
354 xglDisable( GL_DEPTH_TEST );
355 xglDisable( GL_LIGHTING );
356 xglDisable( GL_CULL_FACE );
357 xglDisable( GL_FOG );
358 xglShadeModel( GL_SMOOTH );
361 /* setup transformation for drawing astronomical objects */
363 /* Translate to view position */
364 xglTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
365 /* Rotate based on gst (sidereal time) */
366 angle = t->gst * 15.041085; /* should be 15.041085, Curt thought it was 15*/
367 /* printf("Rotating astro objects by %.2f degrees\n",angle); */
368 xglRotatef( angle, 0.0, 0.0, -1.0 );
370 /* draw stars and planets */
377 /* render the moon */
378 xglEnable( GL_LIGHTING );
379 /* set lighting parameters */
380 xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
381 xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
382 xglEnable( GL_CULL_FACE );
384 /* Let's try some blending technique's (Durk)*/
386 glBlendFunc(GL_ONE, GL_ONE);
393 xglShadeModel( /* GL_FLAT */ GL_SMOOTH );
394 xglEnable( GL_DEPTH_TEST );
396 xglFogfv (GL_FOG_COLOR, l->fog_color);
397 /* set lighting parameters */
398 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
399 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
401 /* fgSceneryRender(); */
408 /* display instruments */
409 if (displayInstruments) {
410 fgUpdateInstrViewParams();
417 /**************************************************************************
418 * Update internal time dependent calculations (i.e. flight model)
419 **************************************************************************/
421 void fgUpdateTimeDepCalcs(int multi_loop) {
427 f = current_aircraft.flight;
428 t = &cur_time_params;
431 /* update the flight model */
432 if ( multi_loop < 0 ) {
433 multi_loop = DEFAULT_MULTILOOP;
436 /* printf("updating flight model x %d\n", multi_loop); */
437 fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
439 /* update the view angle */
440 for ( i = 0; i < multi_loop; i++ ) {
441 if ( fabs(v->goal_view_offset - v->view_offset) < 0.05 ) {
442 v->view_offset = v->goal_view_offset;
445 /* move v->view_offset towards v->goal_view_offset */
446 if ( v->goal_view_offset > v->view_offset ) {
447 if ( v->goal_view_offset - v->view_offset < FG_PI ) {
448 v->view_offset += 0.01;
450 v->view_offset -= 0.01;
453 if ( v->view_offset - v->goal_view_offset < FG_PI ) {
454 v->view_offset -= 0.01;
456 v->view_offset += 0.01;
459 if ( v->view_offset > FG_2PI ) {
460 v->view_offset -= FG_2PI;
461 } else if ( v->view_offset < 0 ) {
462 v->view_offset += FG_2PI;
469 void fgInitTimeDepCalcs( void ) {
470 /* initialize timer */
473 fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
479 /**************************************************************************
480 * Scenery management routines
481 **************************************************************************/
483 /* static void fgSceneryInit_OLD() { */
485 /* scenery = fgSceneryCompile_OLD();
486 runway = fgRunwayHack_OLD(0.69, 53.07);
490 /* create the scenery */
491 /* GLint fgSceneryCompile_OLD() {
494 scenery = mesh2GL(mesh_ptr_OLD);
500 /* hack in a runway */
501 /* GLint fgRunwayHack_OLD(double width, double length) {
502 static GLfloat concrete[4] = { 0.5, 0.5, 0.5, 1.0 };
503 static GLfloat line[4] = { 0.9, 0.9, 0.9, 1.0 };
506 float line_len, line_width_2, cur_pos;
508 runway = xglGenLists(1);
509 xglNewList(runway, GL_COMPILE);
512 /* xglBegin(GL_POLYGON);
513 xglMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, concrete );
514 xglNormal3f(0.0, 0.0, 1.0);
516 xglVertex3d( 0.0, -width/2.0, 0.0);
517 xglVertex3d( 0.0, width/2.0, 0.0);
518 xglVertex3d(length, width/2.0, 0.0);
519 xglVertex3d(length, -width/2.0, 0.0);
522 /* draw center line */
523 /* xglMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, line );
524 line_len = length / ( 2 * num_lines + 1);
525 printf("line_len = %.3f\n", line_len);
528 for ( i = 0; i < num_lines; i++ ) {
529 xglBegin(GL_POLYGON);
530 xglVertex3d( cur_pos, -line_width_2, 0.005);
531 xglVertex3d( cur_pos, line_width_2, 0.005);
533 xglVertex3d( cur_pos, line_width_2, 0.005);
534 xglVertex3d( cur_pos, -line_width_2, 0.005);
545 /* draw the scenery */
546 /*static void fgSceneryDraw_OLD() {
547 static float z = 32.35;
551 xglCallList(scenery);
553 printf("*** Drawing runway at %.2f\n", z);
555 xglTranslatef( -398391.28, 120070.41, 32.35);
556 xglRotatef(170.0, 0.0, 0.0, 1.0);
564 /* What should we do when we have nothing else to do? How about get
565 * ready for the next move and update the display? */
566 static void fgMainLoop( void ) {
567 static int remainder = 0;
568 int elapsed, multi_loop;
570 /* double joy_x, joy_y; */
571 /* int joy_b1, joy_b2; */
576 fgPrintf( FG_ALL, FG_DEBUG, "Running Main Loop\n");
577 fgPrintf( FG_ALL, FG_DEBUG, "======= ==== ====\n");
579 a = ¤t_aircraft;
581 t = &cur_time_params;
587 /* fgJoystickRead( &joy_x, &joy_y, &joy_b1, &joy_b2 );
588 printf( "Joystick X %f Y %f B1 %d B2 %d\n",
589 joy_x, joy_y, joy_b1, joy_b2 );
591 fgAileronSet( joy_x ); */
593 /* Calculate model iterations needed */
594 elapsed = fgGetTimeInterval();
595 fgPrintf( FG_ALL, FG_BULK,
596 "Time interval is = %d, previous remainder is = %d\n",
598 fgPrintf( FG_ALL, FG_BULK,
599 "--> Frame rate is = %.2f\n", 1000.0 / (float)elapsed);
600 elapsed += remainder;
602 multi_loop = (int)(((float)elapsed * 0.001) * DEFAULT_MODEL_HZ);
603 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
604 fgPrintf( FG_ALL, FG_BULK,
605 "Model iterations needed = %d, new remainder = %d\n",
606 multi_loop, remainder);
608 /* Run flight model */
609 if ( ! use_signals ) {
611 fgUpdateTimeDepCalcs(multi_loop);
614 /* I'm just sticking this here for now, it should probably move
616 /* cur_elev = mesh_altitude(FG_Longitude * RAD_TO_ARCSEC,
617 FG_Latitude * RAD_TO_ARCSEC); */
618 /* there is no ground collision detection really, so for now I
619 * just hard code the ground elevation to be 0 */
622 /* printf("Ground elevation is %.2f meters here.\n", cur_elev); */
623 /* FG_Runway_altitude = cur_elev * METER_TO_FEET; */
625 if ( FG_Altitude * FEET_TO_METER < cur_elev + 3.758099) {
626 /* set this here, otherwise if we set runway height above our
627 current height we get a really nasty bounce. */
628 FG_Runway_altitude = FG_Altitude - 3.758099;
630 /* now set aircraft altitude above ground */
631 FG_Altitude = cur_elev * METER_TO_FEET + 3.758099;
632 fgPrintf( FG_ALL, FG_BULK, "<*> resetting altitude to %.0f meters\n",
633 FG_Altitude * FEET_TO_METER);
636 fgAircraftOutputCurrent(a);
638 /* see if we need to load any new scenery tiles */
641 /* Process/manage pending events */
647 fgPrintf( FG_ALL, FG_DEBUG, "\n");
651 /**************************************************************************
652 * Handle new window size or exposure
653 **************************************************************************/
655 static void fgReshape( int width, int height ) {
656 /* Do this so we can call fgReshape(0,0) ourselves without having to know
657 * what the values of width & height are. */
658 if ( (height > 0) && (width > 0) ) {
659 win_ratio = (GLfloat) height / (GLfloat) width;
665 /* Inform gl of our view window size (now handled elsewhere) */
666 /* xglViewport(0, 0, (GLint)width, (GLint)height); */
668 fgUpdateViewParams();
670 /* xglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); */
674 /**************************************************************************
676 **************************************************************************/
678 int main( int argc, char *argv[] ) {
680 int parse_result; // Used in command line argument.
682 f = current_aircraft.flight;
683 // First things first... We must have startup options dealt with.
686 #define VERSION "src-32A"
688 printf("Flight Gear: Version %s\n\n", VERSION);
690 /*********************************************************************
691 * Initialize the Window/Graphics environment.
692 **********************************************************************/
694 /* initialize GLUT */
695 xglutInit(&argc, argv);
697 /* Define Display Parameters */
698 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
700 /* Define initial window size */
701 xglutInitWindowSize(640, 480);
703 /* Initialize windows */
704 xglutCreateWindow("Flight Gear");
706 // xglutInit above will extract all non-general program command line.
707 // We only need wory about our own.
709 parse_result = getargs( argc, argv, OptsDefined, CmdLineOptions, NULL);
711 switch( parse_result ) {
716 print_desc( OptsDefined, CmdLineOptions );
721 printf( "Flight Gear: Command line invalid.");
725 // Deal with the effects of options no set by manipulating the command
726 // line, or possibly set to invalid states.
728 if(( viewArg >= 0) && (viewArg <= 1)) {
729 show_hud = viewArg; // For now view_mode TRUE - no HUD, else show_hud.
731 show_hud = DefaultViewMode;
734 // All other command line option responses are handled in the various
735 // initialization routines (or ignored if not implemented.
737 // This is the general house keeping init routine. It initializes the
738 // debug trail scheme and then any other stuff.
740 if( !fgInitGeneral()) {
742 // This is the top level init routine which calls all the other
743 // subsystem initialization routines. If you are adding a
744 // subsystem to flight gear, its initialization call should
745 // located in this routine.
746 if( !fgInitSubsystems()) {
748 // setup view parameters, only makes GL calls
752 /* init timer routines, signals, etc. Arrange for an alarm
753 signal to be generated, etc. */
754 fgInitTimeDepCalcs();
757 /**********************************************************
758 * Initialize the GLUT Event Handlers.
759 **********************************************************/
761 // call fgReshape() on window resizes
762 xglutReshapeFunc( fgReshape );
764 // call key() on keyboard event
765 xglutKeyboardFunc( GLUTkey );
766 glutSpecialFunc( GLUTspecialkey );
768 // call fgMainLoop() whenever there is
769 // nothing else to do
770 xglutIdleFunc( fgMainLoop );
773 xglutDisplayFunc( fgRenderFrame );
775 // pass control off to the GLUT event handler
778 } // End if subsystems initialize ok
779 } // End if general initializations went ok
781 if( fg_DebugOutput ) {
782 fclose( fg_DebugOutput );
790 void __eprintf( void ) {
796 /* Revision 1.64 1998/02/20 00:16:23 curt
797 /* Thursday's tweaks.
799 * Revision 1.63 1998/02/16 16:17:39 curt
802 * Revision 1.62 1998/02/16 13:39:42 curt
803 * Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
804 * tiles to occasionally be missing.
806 * Revision 1.61 1998/02/12 21:59:46 curt
807 * Incorporated code changes contributed by Charlie Hotchkiss
808 * <chotchkiss@namg.us.anritsu.com>
810 * Revision 1.60 1998/02/11 02:50:40 curt
813 * Revision 1.59 1998/02/09 22:56:54 curt
814 * Removed "depend" files from cvs control. Other minor make tweaks.
816 * Revision 1.58 1998/02/09 15:07:49 curt
819 * Revision 1.57 1998/02/07 15:29:40 curt
820 * Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
821 * <chotchkiss@namg.us.anritsu.com>
823 * Revision 1.56 1998/02/03 23:20:23 curt
824 * Lots of little tweaks to fix various consistency problems discovered by
825 * Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
826 * passed arguments along to the real printf(). Also incorporated HUD changes
827 * by Michele America.
829 * Revision 1.55 1998/02/02 20:53:58 curt
830 * Incorporated Durk's changes.
832 * Revision 1.54 1998/01/31 00:43:10 curt
833 * Added MetroWorks patches from Carmen Volpe.
835 * Revision 1.53 1998/01/27 18:35:54 curt
838 * Revision 1.52 1998/01/27 00:47:56 curt
839 * Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
840 * system and commandline/config file processing code.
842 * Revision 1.51 1998/01/26 15:57:05 curt
843 * Tweaks for dynamic scenery development.
845 * Revision 1.50 1998/01/19 19:27:07 curt
846 * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
847 * This should simplify things tremendously.
849 * Revision 1.49 1998/01/19 18:40:31 curt
850 * Tons of little changes to clean up the code and to remove fatal errors
851 * when building with the c++ compiler.
853 * Revision 1.48 1998/01/19 18:35:46 curt
854 * Minor tweaks and fixes for cygwin32.
856 * Revision 1.47 1998/01/13 00:23:08 curt
857 * Initial changes to support loading and management of scenery tiles. Note,
858 * there's still a fair amount of work left to be done.
860 * Revision 1.46 1998/01/08 02:22:06 curt
861 * Beginning to integrate Tile management subsystem.
863 * Revision 1.45 1998/01/07 03:18:55 curt
864 * Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
866 * Revision 1.44 1997/12/30 22:22:31 curt
867 * Further integration of event manager.
869 * Revision 1.43 1997/12/30 20:47:43 curt
870 * Integrated new event manager with subsystem initializations.
872 * Revision 1.42 1997/12/30 16:36:47 curt
873 * Merged in Durk's changes ...
875 * Revision 1.41 1997/12/30 13:06:56 curt
876 * A couple lighting tweaks ...
878 * Revision 1.40 1997/12/30 01:38:37 curt
879 * Switched back to per vertex normals and smooth shading for terrain.
881 * Revision 1.39 1997/12/22 23:45:45 curt
882 * First stab at sunset/sunrise sky glow effects.
884 * Revision 1.38 1997/12/22 04:14:28 curt
885 * Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
887 * Revision 1.37 1997/12/19 23:34:03 curt
888 * Lot's of tweaking with sky rendering and lighting.
890 * Revision 1.36 1997/12/19 16:44:57 curt
891 * Working on scene rendering order and options.
893 * Revision 1.35 1997/12/18 23:32:32 curt
894 * First stab at sky dome actually starting to look reasonable. :-)
896 * Revision 1.34 1997/12/17 23:13:34 curt
897 * Began working on rendering a sky.
899 * Revision 1.33 1997/12/15 23:54:45 curt
900 * Add xgl wrappers for debugging.
901 * Generate terrain normals on the fly.
903 * Revision 1.32 1997/12/15 20:59:08 curt
906 * Revision 1.31 1997/12/12 21:41:25 curt
907 * More light/material property tweaking ... still a ways off.
909 * Revision 1.30 1997/12/12 19:52:47 curt
910 * Working on lightling and material properties.
912 * Revision 1.29 1997/12/11 04:43:54 curt
913 * Fixed sun vector and lighting problems. I thing the moon is now lit
916 * Revision 1.28 1997/12/10 22:37:45 curt
917 * Prepended "fg" on the name of all global structures that didn't have it yet.
918 * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
920 * Revision 1.27 1997/12/09 05:11:54 curt
921 * Working on tweaking lighting.
923 * Revision 1.26 1997/12/09 04:25:29 curt
924 * Working on adding a global lighting params structure.
926 * Revision 1.25 1997/12/08 22:54:09 curt
927 * Enabled GL_CULL_FACE.
929 * Revision 1.24 1997/11/25 19:25:32 curt
930 * Changes to integrate Durk's moon/sun code updates + clean up.
932 * Revision 1.23 1997/11/15 18:16:34 curt
935 * Revision 1.22 1997/10/30 12:38:41 curt
936 * Working on new scenery subsystem.
938 * Revision 1.21 1997/09/23 00:29:38 curt
939 * Tweaks to get things to compile with gcc-win32.
941 * Revision 1.20 1997/09/22 14:44:19 curt
942 * Continuing to try to align stars correctly.
944 * Revision 1.19 1997/09/18 16:20:08 curt
945 * At dusk/dawn add/remove stars in stages.
947 * Revision 1.18 1997/09/16 22:14:51 curt
948 * Tweaked time of day lighting equations. Don't draw stars during the day.
950 * Revision 1.17 1997/09/16 15:50:29 curt
951 * Working on star alignment and time issues.
953 * Revision 1.16 1997/09/13 02:00:06 curt
954 * Mostly working on stars and generating sidereal time for accurate star
957 * Revision 1.15 1997/09/05 14:17:27 curt
958 * More tweaking with stars.
960 * Revision 1.14 1997/09/05 01:35:53 curt
961 * Working on getting stars right.
963 * Revision 1.13 1997/09/04 02:17:34 curt
966 * Revision 1.12 1997/08/27 21:32:24 curt
967 * Restructured view calculation code. Added stars.
969 * Revision 1.11 1997/08/27 03:30:16 curt
970 * Changed naming scheme of basic shared structures.
972 * Revision 1.10 1997/08/25 20:27:22 curt
973 * Merged in initial HUD and Joystick code.
975 * Revision 1.9 1997/08/22 21:34:39 curt
976 * Doing a bit of reorganizing and house cleaning.
978 * Revision 1.8 1997/08/19 23:55:03 curt
979 * Worked on better simulating real lighting.
981 * Revision 1.7 1997/08/16 12:22:38 curt
982 * Working on improving the lighting/shading.
984 * Revision 1.6 1997/08/13 20:24:56 curt
985 * Changes due to changing sunpos interface.
987 * Revision 1.5 1997/08/06 21:08:32 curt
988 * Sun position now *really* works (I think) ... I still have sun time warping
989 * code in place, probably should remove it soon.
991 * Revision 1.4 1997/08/06 15:41:26 curt
992 * Working on correct sun position.
994 * Revision 1.3 1997/08/06 00:24:22 curt
995 * Working on correct real time sun lighting.
997 * Revision 1.2 1997/08/04 20:25:15 curt
998 * Organizational tweaking.
1000 * Revision 1.1 1997/08/02 18:45:00 curt
1001 * Renamed GLmain.c GLUTmain.c
1003 * Revision 1.43 1997/08/02 16:23:47 curt
1006 * Revision 1.42 1997/08/01 19:43:33 curt
1007 * Making progress with coordinate system overhaul.
1009 * Revision 1.41 1997/07/31 22:52:37 curt
1010 * Working on redoing internal coordinate systems & scenery transformations.
1012 * Revision 1.40 1997/07/30 16:12:42 curt
1013 * Moved fg_random routines from Util/ to Math/
1015 * Revision 1.39 1997/07/21 14:45:01 curt
1018 * Revision 1.38 1997/07/19 23:04:47 curt
1019 * Added an initial weather section.
1021 * Revision 1.37 1997/07/19 22:34:02 curt
1022 * Moved PI definitions to ../constants.h
1023 * Moved random() stuff to ../Utils/ and renamed fg_random()
1025 * Revision 1.36 1997/07/18 23:41:25 curt
1026 * Tweaks for building with Cygnus Win32 compiler.
1028 * Revision 1.35 1997/07/18 14:28:34 curt
1029 * Hacked in some support for wind/turbulence.
1031 * Revision 1.34 1997/07/16 20:04:48 curt
1032 * Minor tweaks to aid Win32 port.
1034 * Revision 1.33 1997/07/12 03:50:20 curt
1035 * Added an #include <Windows32/Base.h> to help compiling for Win32
1037 * Revision 1.32 1997/07/11 03:23:18 curt
1038 * Solved some scenery display/orientation problems. Still have a positioning
1039 * (or transformation?) problem.
1041 * Revision 1.31 1997/07/11 01:29:58 curt
1042 * More tweaking of terrian floor.
1044 * Revision 1.30 1997/07/10 04:26:37 curt
1045 * We now can interpolated ground elevation for any position in the grid. We
1046 * can use this to enforce a "hard" ground. We still need to enforce some
1047 * bounds checking so that we don't try to lookup data points outside the
1050 * Revision 1.29 1997/07/09 21:31:12 curt
1051 * Working on making the ground "hard."
1053 * Revision 1.28 1997/07/08 18:20:12 curt
1054 * Working on establishing a hard ground.
1056 * Revision 1.27 1997/07/07 20:59:49 curt
1057 * Working on scenery transformations to enable us to fly fluidly over the
1058 * poles with no discontinuity/distortion in scenery.
1060 * Revision 1.26 1997/07/05 20:43:34 curt
1061 * renamed mat3 directory to Math so we could add other math related routines.
1063 * Revision 1.25 1997/06/29 21:19:17 curt
1064 * Working on scenery management system.
1066 * Revision 1.24 1997/06/26 22:14:53 curt
1067 * Beginning work on a scenery management system.
1069 * Revision 1.23 1997/06/26 19:08:33 curt
1070 * Restructuring make, adding automatic "make dep" support.
1072 * Revision 1.22 1997/06/25 15:39:47 curt
1073 * Minor changes to compile with rsxnt/win32.
1075 * Revision 1.21 1997/06/22 21:44:41 curt
1076 * Working on intergrating the VRML (subset) parser.
1078 * Revision 1.20 1997/06/21 17:12:53 curt
1079 * Capitalized subdirectory names.
1081 * Revision 1.19 1997/06/18 04:10:31 curt
1082 * A couple more runway tweaks ...
1084 * Revision 1.18 1997/06/18 02:21:24 curt
1085 * Hacked in a runway
1087 * Revision 1.17 1997/06/17 16:51:58 curt
1088 * Timer interval stuff now uses gettimeofday() instead of ftime()
1090 * Revision 1.16 1997/06/17 04:19:16 curt
1091 * More timer related tweaks with respect to view direction changes.
1093 * Revision 1.15 1997/06/17 03:41:10 curt
1094 * Nonsignal based interval timing is now working.
1095 * This would be a good time to look at cleaning up the code structure a bit.
1097 * Revision 1.14 1997/06/16 19:32:51 curt
1098 * Starting to add general timer support.
1100 * Revision 1.13 1997/06/02 03:40:06 curt
1101 * A tiny bit more view tweaking.
1103 * Revision 1.12 1997/06/02 03:01:38 curt
1104 * Working on views (side, front, back, transitions, etc.)
1106 * Revision 1.11 1997/05/31 19:16:25 curt
1107 * Elevator trim added.
1109 * Revision 1.10 1997/05/31 04:13:52 curt
1112 * Continuing work on the LaRCsim flight model integration.
1113 * Added some MSFS-like keyboard input handling.
1115 * Revision 1.9 1997/05/30 19:27:01 curt
1116 * The LaRCsim flight model is starting to look like it is working.
1118 * Revision 1.8 1997/05/30 03:54:10 curt
1119 * Made a bit more progress towards integrating the LaRCsim flight model.
1121 * Revision 1.7 1997/05/29 22:39:49 curt
1122 * Working on incorporating the LaRCsim flight model.
1124 * Revision 1.6 1997/05/29 12:31:39 curt
1125 * Minor tweaks, moving towards general flight model integration.
1127 * Revision 1.5 1997/05/29 02:33:23 curt
1128 * Updated to reflect changing interfaces in other "modules."
1130 * Revision 1.4 1997/05/27 17:44:31 curt
1131 * Renamed & rearranged variables and routines. Added some initial simple
1132 * timer/alarm routines so the flight model can be updated on a regular
1135 * Revision 1.3 1997/05/23 15:40:25 curt
1136 * Added GNU copyright headers.
1139 * Revision 1.2 1997/05/23 00:35:12 curt
1140 * Trying to get fog to work ...
1142 * Revision 1.1 1997/05/21 15:57:51 curt
1143 * Renamed due to added GLUT support.
1145 * Revision 1.3 1997/05/19 18:22:42 curt
1146 * Parameter tweaking ... starting to stub in fog support.
1148 * Revision 1.2 1997/05/17 00:17:34 curt
1149 * Trying to stub in support for standard OpenGL.
1151 * Revision 1.1 1997/05/16 16:05:52 curt