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 **************************************************************************/
32 #include "../XGL/xgl.h"
39 #include "../Include/constants.h"
40 #include "../Include/general.h"
42 #include "../Aircraft/aircraft.h"
43 #include "../Cockpit/cockpit.h"
44 #include "../Joystick/joystick.h"
45 #include "../Math/fg_geodesy.h"
46 #include "../Math/mat3.h"
47 #include "../Math/polar.h"
48 #include "../Scenery/mesh.h"
49 #include "../Scenery/moon.h"
50 #include "../Scenery/scenery.h"
51 #include "../Scenery/sky.h"
52 #include "../Scenery/stars.h"
53 #include "../Scenery/sun.h"
54 #include "../Time/fg_time.h"
55 #include "../Time/fg_timer.h"
56 #include "../Time/sunpos.h"
57 #include "../Weather/weather.h"
60 /* This is a record containing global housekeeping information */
61 struct fgGENERAL general;
64 static GLfloat win_ratio = 1.0;
67 /* pointer to scenery structure */
68 /* static GLint scenery, runway; */
75 /* Yet another hack. This one used by the HUD code. Michele */
79 /**************************************************************************
80 * fgInitVisuals() -- Initialize various GL/view parameters
81 **************************************************************************/
83 static void fgInitVisuals() {
88 l = &cur_light_params;
93 /* xglDisable( GL_DITHER ); */
95 /* If enabled, normal vectors specified with glNormal are scaled
96 to unit length after transformation. See glNormal. */
97 xglEnable( GL_NORMALIZE );
99 xglEnable( GL_LIGHTING );
100 xglEnable( GL_LIGHT0 );
101 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
103 xglFogi (GL_FOG_MODE, GL_LINEAR);
104 /* xglFogf (GL_FOG_START, 1.0); */
105 xglFogf (GL_FOG_END, w->visibility);
106 /* xglFogf (GL_FOG_DENSITY, w->visibility); */
107 /* xglHint (GL_FOG_HINT, GL_FASTEST); */
111 /**************************************************************************
112 * Update the view volume, position, and orientation
113 **************************************************************************/
115 static void fgUpdateViewParams() {
121 double x_2, x_4, x_8, x_10;
122 double light, ambient, diffuse, sky_brightness;
123 /* if the 4th field is 0.0, this specifies a direction ... */
125 GLfloat base_sky_color[4] = {0.60, 0.60, 0.90, 1.0};
127 /* GLfloat base_fog_color[4] = {0.70, 0.70, 0.70, 1.0}; */
128 GLfloat base_fog_color[4] = {1.00, 0.00, 0.00, 1.0};
130 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
132 f = ¤t_aircraft.flight;
133 l = &cur_light_params;
134 t = &cur_time_params;
139 /* Tell GL we are about to modify the projection parameters */
140 xglMatrixMode(GL_PROJECTION);
142 gluPerspective(55.0, 1.0/win_ratio, 1.0, 100000.0);
144 xglMatrixMode(GL_MODELVIEW);
147 /* set up our view volume */
148 gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
149 v->view_pos.x + v->view_forward[0],
150 v->view_pos.y + v->view_forward[1],
151 v->view_pos.z + v->view_forward[2],
152 v->view_up[0], v->view_up[1], v->view_up[2]);
154 /* set the sun position */
155 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
157 /* calculate lighting parameters based on sun's relative angle to
159 /* ya kind'a have to plot this to see how it works */
161 /* x = t->sun_angle^8 */
162 x_2 = l->sun_angle * l->sun_angle;
167 light = pow(1.1, -x_10 / 30.0);
168 ambient = 0.3 * light;
169 diffuse = 0.9 * light;
171 sky_brightness = 0.85 * pow(1.2, -x_8 / 20.0) + 0.15;
173 /* sky_brightness = 0.15; */ /* to force a dark sky (for testing) */
175 if ( ambient < 0.1 ) { ambient = 0.1; }
176 if ( diffuse < 0.0 ) { diffuse = 0.0; }
178 if ( sky_brightness < 0.1 ) { sky_brightness = 0.1; }
180 l->scene_ambient[0] = white[0] * ambient;
181 l->scene_ambient[1] = white[1] * ambient;
182 l->scene_ambient[2] = white[2] * ambient;
184 l->scene_diffuse[0] = white[0] * diffuse;
185 l->scene_diffuse[1] = white[1] * diffuse;
186 l->scene_diffuse[2] = white[2] * diffuse;
189 l->fog_color[0] = base_fog_color[0] * (ambient + diffuse);
190 l->fog_color[1] = base_fog_color[1] * (ambient + diffuse);
191 l->fog_color[2] = base_fog_color[2] * (ambient + diffuse);
192 l->fog_color[3] = base_fog_color[3];
195 l->sky_color[0] = base_sky_color[0] * sky_brightness;
196 l->sky_color[1] = base_sky_color[1] * sky_brightness;
197 l->sky_color[2] = base_sky_color[2] * sky_brightness;
198 l->sky_color[3] = base_sky_color[3];
202 /**************************************************************************
203 * Update all Visuals (redraws anything graphics related)
204 **************************************************************************/
206 static void fgUpdateVisuals( void ) {
211 static double lastAstroUpdate = 0;
212 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
214 l = &cur_light_params;
215 t = &cur_time_params;
218 /* update view volume parameters */
219 fgUpdateViewParams();
221 xglClear( GL_DEPTH_BUFFER_BIT /* | GL_COLOR_BUFFER_BIT */ );
223 /* Tell GL we are switching to model view parameters */
224 xglMatrixMode(GL_MODELVIEW);
225 /* xglLoadIdentity(); */
228 xglDisable( GL_DEPTH_TEST );
229 xglDisable( GL_LIGHTING );
230 xglDisable( GL_CULL_FACE );
231 xglDisable( GL_FOG );
232 xglShadeModel( GL_SMOOTH );
235 /* a hack: Force sun and moon position to be updated on an hourly basis */
236 if (((t->gst - lastAstroUpdate) > 1) || (t->gst < lastAstroUpdate)) {
237 lastAstroUpdate = t->gst;
242 /* setup transformation for drawing astronomical objects */
244 /* Translate to view position */
245 xglTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
246 /* Rotate based on gst (side real time) */
247 angle = t->gst * 15.041085; /* should be 15.041085, Curt thought it was 15*/
248 /* printf("Rotating astro objects by %.2f degrees\n",angle); */
249 xglRotatef( angle, 0.0, 0.0, -1.0 );
251 /* draw stars and planets */
257 /* render the moon */
258 xglEnable( GL_LIGHTING );
259 /* set lighting parameters */
260 xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
261 xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
262 xglEnable( GL_CULL_FACE );
268 xglShadeModel( GL_FLAT );
269 xglEnable( GL_DEPTH_TEST );
271 xglFogfv (GL_FOG_COLOR, l->fog_color);
272 /* set lighting parameters */
273 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
274 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
279 fgCockpitUpdate(); */
287 /**************************************************************************
288 * Update internal time dependent calculations (i.e. flight model)
289 **************************************************************************/
291 void fgUpdateTimeDepCalcs(int multi_loop) {
297 f = ¤t_aircraft.flight;
298 t = &cur_time_params;
301 /* update the flight model */
302 if ( multi_loop < 0 ) {
303 multi_loop = DEFAULT_MULTILOOP;
306 /* printf("updating flight model x %d\n", multi_loop); */
307 fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
309 /* refresh shared sun position and sun_vec */
310 fgUpdateSunPos(scenery.center);
312 /* update the view angle */
313 for ( i = 0; i < multi_loop; i++ ) {
314 if ( fabs(v->goal_view_offset - v->view_offset) < 0.05 ) {
315 v->view_offset = v->goal_view_offset;
318 /* move v->view_offset towards v->goal_view_offset */
319 if ( v->goal_view_offset > v->view_offset ) {
320 if ( v->goal_view_offset - v->view_offset < FG_PI ) {
321 v->view_offset += 0.01;
323 v->view_offset -= 0.01;
326 if ( v->view_offset - v->goal_view_offset < FG_PI ) {
327 v->view_offset -= 0.01;
329 v->view_offset += 0.01;
332 if ( v->view_offset > FG_2PI ) {
333 v->view_offset -= FG_2PI;
334 } else if ( v->view_offset < 0 ) {
335 v->view_offset += FG_2PI;
342 void fgInitTimeDepCalcs() {
343 /* initialize timer */
346 fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
352 /**************************************************************************
353 * Scenery management routines
354 **************************************************************************/
356 /* static void fgSceneryInit_OLD() { */
358 /* scenery = fgSceneryCompile_OLD();
359 runway = fgRunwayHack_OLD(0.69, 53.07);
363 /* create the scenery */
364 /* GLint fgSceneryCompile_OLD() {
367 scenery = mesh2GL(mesh_ptr_OLD);
373 /* hack in a runway */
374 /* GLint fgRunwayHack_OLD(double width, double length) {
375 static GLfloat concrete[4] = { 0.5, 0.5, 0.5, 1.0 };
376 static GLfloat line[4] = { 0.9, 0.9, 0.9, 1.0 };
379 float line_len, line_width_2, cur_pos;
381 runway = xglGenLists(1);
382 xglNewList(runway, GL_COMPILE);
385 /* xglBegin(GL_POLYGON);
386 xglMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, concrete );
387 xglNormal3f(0.0, 0.0, 1.0);
389 xglVertex3d( 0.0, -width/2.0, 0.0);
390 xglVertex3d( 0.0, width/2.0, 0.0);
391 xglVertex3d(length, width/2.0, 0.0);
392 xglVertex3d(length, -width/2.0, 0.0);
395 /* draw center line */
396 /* xglMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, line );
397 line_len = length / ( 2 * num_lines + 1);
398 printf("line_len = %.3f\n", line_len);
401 for ( i = 0; i < num_lines; i++ ) {
402 xglBegin(GL_POLYGON);
403 xglVertex3d( cur_pos, -line_width_2, 0.005);
404 xglVertex3d( cur_pos, line_width_2, 0.005);
406 xglVertex3d( cur_pos, line_width_2, 0.005);
407 xglVertex3d( cur_pos, -line_width_2, 0.005);
418 /* draw the scenery */
419 /*static void fgSceneryDraw_OLD() {
420 static float z = 32.35;
424 xglCallList(scenery);
426 printf("*** Drawing runway at %.2f\n", z);
428 xglTranslatef( -398391.28, 120070.41, 32.35);
429 xglRotatef(170.0, 0.0, 0.0, 1.0);
436 /* What should we do when we have nothing else to do? How about get
437 * ready for the next move and update the display? */
438 static void fgMainLoop( void ) {
439 static int remainder = 0;
440 int elapsed, multi_loop;
444 struct fgAIRCRAFT *a;
448 a = ¤t_aircraft;
450 t = &cur_time_params;
456 /* fgJoystickRead( &joy_x, &joy_y, &joy_b1, &joy_b2 );
457 printf( "Joystick X %f Y %f B1 %d B2 %d\n",
458 joy_x, joy_y, joy_b1, joy_b2 );
460 fgAileronSet( joy_x ); */
462 /* update the weather for our current position */
463 fgWeatherUpdate(FG_Longitude * RAD_TO_ARCSEC,
464 FG_Latitude * RAD_TO_ARCSEC,
465 FG_Altitude * FEET_TO_METER);
467 /* Calculate model iterations needed */
468 elapsed = fgGetTimeInterval();
469 printf("Time interval is = %d, previous remainder is = %d\n", elapsed,
471 printf("--> Frame rate is = %.2f\n", 1000.0 / (float)elapsed);
472 elapsed += remainder;
474 multi_loop = ((float)elapsed * 0.001) * DEFAULT_MODEL_HZ;
475 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
476 printf("Model iterations needed = %d, new remainder = %d\n", multi_loop,
479 if ( ! use_signals ) {
481 fgUpdateTimeDepCalcs(multi_loop);
484 /* I'm just sticking this here for now, it should probably move
486 cur_elev = mesh_altitude(FG_Longitude * RAD_TO_ARCSEC,
487 FG_Latitude * RAD_TO_ARCSEC);
488 printf("Ground elevation is %.2f meters here.\n", cur_elev);
489 /* FG_Runway_altitude = cur_elev * METER_TO_FEET; */
491 if ( FG_Altitude * FEET_TO_METER < cur_elev + 3.758099) {
492 /* set this here, otherwise if we set runway height above our
493 current height we get a really nasty bounce. */
494 FG_Runway_altitude = FG_Altitude - 3.758099;
496 /* now set aircraft altitude above ground */
497 FG_Altitude = cur_elev * METER_TO_FEET + 3.758099;
498 printf("<*> resetting altitude to %.0f meters\n",
499 FG_Altitude * FEET_TO_METER);
502 fgAircraftOutputCurrent(a);
509 /**************************************************************************
510 * Handle new window size or exposure
511 **************************************************************************/
513 static void fgReshape( int width, int height ) {
514 /* Do this so we can call fgReshape(0,0) ourselves without having to know
515 * what the values of width & height are. */
516 if ( (height > 0) && (width > 0) ) {
517 win_ratio = (GLfloat) height / (GLfloat) width;
520 /* Inform gl of our view window size */
521 xglViewport(0, 0, (GLint)width, (GLint)height);
523 fgUpdateViewParams();
525 /* xglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); */
529 /**************************************************************************
531 **************************************************************************/
533 int main( int argc, char *argv[] ) {
536 f = ¤t_aircraft.flight;
538 printf("Flight Gear: prototype version %s\n\n", VERSION);
540 /**********************************************************************
541 * Initialize the Window/Graphics environment.
542 **********************************************************************/
545 /* initialize GLUT */
546 xglutInit(&argc, argv);
548 /* Define Display Parameters */
549 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
551 /* Define initial window size */
552 xglutInitWindowSize(640, 480);
554 /* Initialize windows */
555 xglutCreateWindow("Flight Gear");
558 /* This is the general house keeping init routine */
561 /* This is the top level init routine which calls all the other
562 * subsystem initialization routines. If you are adding a
563 * subsystem to flight gear, its initialization call should
564 * located in this routine.*/
567 /* setup view parameters, only makes GL calls */
571 /* init timer routines, signals, etc. Arrange for an alarm
572 signal to be generated, etc. */
573 fgInitTimeDepCalcs();
576 /**********************************************************************
577 * Initialize the Event Handlers.
578 **********************************************************************/
581 /* call fgReshape() on window resizes */
582 xglutReshapeFunc( fgReshape );
584 /* call key() on keyboard event */
585 xglutKeyboardFunc( GLUTkey );
586 glutSpecialFunc( GLUTspecialkey );
588 /* call fgMainLoop() whenever there is nothing else to do */
589 xglutIdleFunc( fgMainLoop );
592 xglutDisplayFunc( fgUpdateVisuals );
594 /* pass control off to the GLUT event handler */
604 int printf (const char *format, ...) {
610 /* Revision 1.37 1997/12/19 23:34:03 curt
611 /* Lot's of tweaking with sky rendering and lighting.
613 * Revision 1.36 1997/12/19 16:44:57 curt
614 * Working on scene rendering order and options.
616 * Revision 1.35 1997/12/18 23:32:32 curt
617 * First stab at sky dome actually starting to look reasonable. :-)
619 * Revision 1.34 1997/12/17 23:13:34 curt
620 * Began working on rendering a sky.
622 * Revision 1.33 1997/12/15 23:54:45 curt
623 * Add xgl wrappers for debugging.
624 * Generate terrain normals on the fly.
626 * Revision 1.32 1997/12/15 20:59:08 curt
629 * Revision 1.31 1997/12/12 21:41:25 curt
630 * More light/material property tweaking ... still a ways off.
632 * Revision 1.30 1997/12/12 19:52:47 curt
633 * Working on lightling and material properties.
635 * Revision 1.29 1997/12/11 04:43:54 curt
636 * Fixed sun vector and lighting problems. I thing the moon is now lit
639 * Revision 1.28 1997/12/10 22:37:45 curt
640 * Prepended "fg" on the name of all global structures that didn't have it yet.
641 * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
643 * Revision 1.27 1997/12/09 05:11:54 curt
644 * Working on tweaking lighting.
646 * Revision 1.26 1997/12/09 04:25:29 curt
647 * Working on adding a global lighting params structure.
649 * Revision 1.25 1997/12/08 22:54:09 curt
650 * Enabled GL_CULL_FACE.
652 * Revision 1.24 1997/11/25 19:25:32 curt
653 * Changes to integrate Durk's moon/sun code updates + clean up.
655 * Revision 1.23 1997/11/15 18:16:34 curt
658 * Revision 1.22 1997/10/30 12:38:41 curt
659 * Working on new scenery subsystem.
661 * Revision 1.21 1997/09/23 00:29:38 curt
662 * Tweaks to get things to compile with gcc-win32.
664 * Revision 1.20 1997/09/22 14:44:19 curt
665 * Continuing to try to align stars correctly.
667 * Revision 1.19 1997/09/18 16:20:08 curt
668 * At dusk/dawn add/remove stars in stages.
670 * Revision 1.18 1997/09/16 22:14:51 curt
671 * Tweaked time of day lighting equations. Don't draw stars during the day.
673 * Revision 1.17 1997/09/16 15:50:29 curt
674 * Working on star alignment and time issues.
676 * Revision 1.16 1997/09/13 02:00:06 curt
677 * Mostly working on stars and generating sidereal time for accurate star
680 * Revision 1.15 1997/09/05 14:17:27 curt
681 * More tweaking with stars.
683 * Revision 1.14 1997/09/05 01:35:53 curt
684 * Working on getting stars right.
686 * Revision 1.13 1997/09/04 02:17:34 curt
689 * Revision 1.12 1997/08/27 21:32:24 curt
690 * Restructured view calculation code. Added stars.
692 * Revision 1.11 1997/08/27 03:30:16 curt
693 * Changed naming scheme of basic shared structures.
695 * Revision 1.10 1997/08/25 20:27:22 curt
696 * Merged in initial HUD and Joystick code.
698 * Revision 1.9 1997/08/22 21:34:39 curt
699 * Doing a bit of reorganizing and house cleaning.
701 * Revision 1.8 1997/08/19 23:55:03 curt
702 * Worked on better simulating real lighting.
704 * Revision 1.7 1997/08/16 12:22:38 curt
705 * Working on improving the lighting/shading.
707 * Revision 1.6 1997/08/13 20:24:56 curt
708 * Changes due to changing sunpos interface.
710 * Revision 1.5 1997/08/06 21:08:32 curt
711 * Sun position now *really* works (I think) ... I still have sun time warping
712 * code in place, probably should remove it soon.
714 * Revision 1.4 1997/08/06 15:41:26 curt
715 * Working on correct sun position.
717 * Revision 1.3 1997/08/06 00:24:22 curt
718 * Working on correct real time sun lighting.
720 * Revision 1.2 1997/08/04 20:25:15 curt
721 * Organizational tweaking.
723 * Revision 1.1 1997/08/02 18:45:00 curt
724 * Renamed GLmain.c GLUTmain.c
726 * Revision 1.43 1997/08/02 16:23:47 curt
729 * Revision 1.42 1997/08/01 19:43:33 curt
730 * Making progress with coordinate system overhaul.
732 * Revision 1.41 1997/07/31 22:52:37 curt
733 * Working on redoing internal coordinate systems & scenery transformations.
735 * Revision 1.40 1997/07/30 16:12:42 curt
736 * Moved fg_random routines from Util/ to Math/
738 * Revision 1.39 1997/07/21 14:45:01 curt
741 * Revision 1.38 1997/07/19 23:04:47 curt
742 * Added an initial weather section.
744 * Revision 1.37 1997/07/19 22:34:02 curt
745 * Moved PI definitions to ../constants.h
746 * Moved random() stuff to ../Utils/ and renamed fg_random()
748 * Revision 1.36 1997/07/18 23:41:25 curt
749 * Tweaks for building with Cygnus Win32 compiler.
751 * Revision 1.35 1997/07/18 14:28:34 curt
752 * Hacked in some support for wind/turbulence.
754 * Revision 1.34 1997/07/16 20:04:48 curt
755 * Minor tweaks to aid Win32 port.
757 * Revision 1.33 1997/07/12 03:50:20 curt
758 * Added an #include <Windows32/Base.h> to help compiling for Win32
760 * Revision 1.32 1997/07/11 03:23:18 curt
761 * Solved some scenery display/orientation problems. Still have a positioning
762 * (or transformation?) problem.
764 * Revision 1.31 1997/07/11 01:29:58 curt
765 * More tweaking of terrian floor.
767 * Revision 1.30 1997/07/10 04:26:37 curt
768 * We now can interpolated ground elevation for any position in the grid. We
769 * can use this to enforce a "hard" ground. We still need to enforce some
770 * bounds checking so that we don't try to lookup data points outside the
773 * Revision 1.29 1997/07/09 21:31:12 curt
774 * Working on making the ground "hard."
776 * Revision 1.28 1997/07/08 18:20:12 curt
777 * Working on establishing a hard ground.
779 * Revision 1.27 1997/07/07 20:59:49 curt
780 * Working on scenery transformations to enable us to fly fluidly over the
781 * poles with no discontinuity/distortion in scenery.
783 * Revision 1.26 1997/07/05 20:43:34 curt
784 * renamed mat3 directory to Math so we could add other math related routines.
786 * Revision 1.25 1997/06/29 21:19:17 curt
787 * Working on scenery management system.
789 * Revision 1.24 1997/06/26 22:14:53 curt
790 * Beginning work on a scenery management system.
792 * Revision 1.23 1997/06/26 19:08:33 curt
793 * Restructuring make, adding automatic "make dep" support.
795 * Revision 1.22 1997/06/25 15:39:47 curt
796 * Minor changes to compile with rsxnt/win32.
798 * Revision 1.21 1997/06/22 21:44:41 curt
799 * Working on intergrating the VRML (subset) parser.
801 * Revision 1.20 1997/06/21 17:12:53 curt
802 * Capitalized subdirectory names.
804 * Revision 1.19 1997/06/18 04:10:31 curt
805 * A couple more runway tweaks ...
807 * Revision 1.18 1997/06/18 02:21:24 curt
810 * Revision 1.17 1997/06/17 16:51:58 curt
811 * Timer interval stuff now uses gettimeofday() instead of ftime()
813 * Revision 1.16 1997/06/17 04:19:16 curt
814 * More timer related tweaks with respect to view direction changes.
816 * Revision 1.15 1997/06/17 03:41:10 curt
817 * Nonsignal based interval timing is now working.
818 * This would be a good time to look at cleaning up the code structure a bit.
820 * Revision 1.14 1997/06/16 19:32:51 curt
821 * Starting to add general timer support.
823 * Revision 1.13 1997/06/02 03:40:06 curt
824 * A tiny bit more view tweaking.
826 * Revision 1.12 1997/06/02 03:01:38 curt
827 * Working on views (side, front, back, transitions, etc.)
829 * Revision 1.11 1997/05/31 19:16:25 curt
830 * Elevator trim added.
832 * Revision 1.10 1997/05/31 04:13:52 curt
835 * Continuing work on the LaRCsim flight model integration.
836 * Added some MSFS-like keyboard input handling.
838 * Revision 1.9 1997/05/30 19:27:01 curt
839 * The LaRCsim flight model is starting to look like it is working.
841 * Revision 1.8 1997/05/30 03:54:10 curt
842 * Made a bit more progress towards integrating the LaRCsim flight model.
844 * Revision 1.7 1997/05/29 22:39:49 curt
845 * Working on incorporating the LaRCsim flight model.
847 * Revision 1.6 1997/05/29 12:31:39 curt
848 * Minor tweaks, moving towards general flight model integration.
850 * Revision 1.5 1997/05/29 02:33:23 curt
851 * Updated to reflect changing interfaces in other "modules."
853 * Revision 1.4 1997/05/27 17:44:31 curt
854 * Renamed & rearranged variables and routines. Added some initial simple
855 * timer/alarm routines so the flight model can be updated on a regular
858 * Revision 1.3 1997/05/23 15:40:25 curt
859 * Added GNU copyright headers.
862 * Revision 1.2 1997/05/23 00:35:12 curt
863 * Trying to get fog to work ...
865 * Revision 1.1 1997/05/21 15:57:51 curt
866 * Renamed due to added GLUT support.
868 * Revision 1.3 1997/05/19 18:22:42 curt
869 * Parameter tweaking ... starting to stub in fog support.
871 * Revision 1.2 1997/05/17 00:17:34 curt
872 * Trying to stub in support for standard OpenGL.
874 * Revision 1.1 1997/05/16 16:05:52 curt