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};
129 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
131 f = ¤t_aircraft.flight;
132 l = &cur_light_params;
133 t = &cur_time_params;
136 fgViewUpdate(f, v, l);
138 /* Tell GL we are about to modify the projection parameters */
139 xglMatrixMode(GL_PROJECTION);
141 gluPerspective(55.0, 1.0/win_ratio, 1.0, 100000.0);
143 xglMatrixMode(GL_MODELVIEW);
146 /* set up our view volume (default) */
147 gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
148 v->view_pos.x + v->view_forward[0],
149 v->view_pos.y + v->view_forward[1],
150 v->view_pos.z + v->view_forward[2],
151 v->view_up[0], v->view_up[1], v->view_up[2]);
153 /* lock view horizontally towards sun (testing) */
154 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
155 v->view_pos.x + v->surface_to_sun[0],
156 v->view_pos.y + v->surface_to_sun[1],
157 v->view_pos.z + v->surface_to_sun[2],
158 v->view_up[0], v->view_up[1], v->view_up[2]); */
160 /* lock view horizontally towards south (testing) */
161 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
162 v->view_pos.x + v->surface_south[0],
163 v->view_pos.y + v->surface_south[1],
164 v->view_pos.z + v->surface_south[2],
165 v->view_up[0], v->view_up[1], v->view_up[2]); */
167 /* set the sun position */
168 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
170 /* calculate lighting parameters based on sun's relative angle to
172 /* ya kind'a have to plot this to see how it works */
174 /* x = t->sun_angle^8 */
175 x_2 = l->sun_angle * l->sun_angle;
180 light = pow(1.1, -x_10 / 30.0);
181 ambient = 0.3 * light;
182 diffuse = 0.9 * light;
184 sky_brightness = 0.85 * pow(1.2, -x_8 / 20.0) + 0.15;
186 /* sky_brightness = 0.15; */ /* to force a dark sky (for testing) */
188 if ( ambient < 0.1 ) { ambient = 0.1; }
189 if ( diffuse < 0.0 ) { diffuse = 0.0; }
191 if ( sky_brightness < 0.1 ) { sky_brightness = 0.1; }
193 l->scene_ambient[0] = white[0] * ambient;
194 l->scene_ambient[1] = white[1] * ambient;
195 l->scene_ambient[2] = white[2] * ambient;
197 l->scene_diffuse[0] = white[0] * diffuse;
198 l->scene_diffuse[1] = white[1] * diffuse;
199 l->scene_diffuse[2] = white[2] * diffuse;
202 l->fog_color[0] = base_fog_color[0] * (ambient + diffuse);
203 l->fog_color[1] = base_fog_color[1] * (ambient + diffuse);
204 l->fog_color[2] = base_fog_color[2] * (ambient + diffuse);
205 l->fog_color[3] = base_fog_color[3];
208 l->sky_color[0] = base_sky_color[0] * sky_brightness;
209 l->sky_color[1] = base_sky_color[1] * sky_brightness;
210 l->sky_color[2] = base_sky_color[2] * sky_brightness;
211 l->sky_color[3] = base_sky_color[3];
215 /**************************************************************************
216 * Update all Visuals (redraws anything graphics related)
217 **************************************************************************/
219 static void fgRenderFrame( void ) {
224 static double lastAstroUpdate = 0;
225 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
227 l = &cur_light_params;
228 t = &cur_time_params;
231 /* update view volume parameters */
232 fgUpdateViewParams();
234 xglClear( GL_DEPTH_BUFFER_BIT /* | GL_COLOR_BUFFER_BIT */ );
236 /* Tell GL we are switching to model view parameters */
237 xglMatrixMode(GL_MODELVIEW);
238 /* xglLoadIdentity(); */
241 xglDisable( GL_DEPTH_TEST );
242 xglDisable( GL_LIGHTING );
243 xglDisable( GL_CULL_FACE );
244 xglDisable( GL_FOG );
245 xglShadeModel( GL_SMOOTH );
248 /* a hack: Force sun and moon position to be updated on an hourly basis */
249 if (((t->gst - lastAstroUpdate) > 1) || (t->gst < lastAstroUpdate)) {
250 lastAstroUpdate = t->gst;
255 /* setup transformation for drawing astronomical objects */
257 /* Translate to view position */
258 xglTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
259 /* Rotate based on gst (side real time) */
260 angle = t->gst * 15.041085; /* should be 15.041085, Curt thought it was 15*/
261 /* printf("Rotating astro objects by %.2f degrees\n",angle); */
262 xglRotatef( angle, 0.0, 0.0, -1.0 );
264 /* draw stars and planets */
270 /* render the moon */
271 xglEnable( GL_LIGHTING );
272 /* set lighting parameters */
273 xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
274 xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
275 xglEnable( GL_CULL_FACE );
281 xglShadeModel( GL_FLAT );
282 xglEnable( GL_DEPTH_TEST );
284 xglFogfv (GL_FOG_COLOR, l->fog_color);
285 /* set lighting parameters */
286 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
287 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
292 fgCockpitUpdate(); */
300 /**************************************************************************
301 * Update internal time dependent calculations (i.e. flight model)
302 **************************************************************************/
304 void fgUpdateTimeDepCalcs(int multi_loop) {
310 f = ¤t_aircraft.flight;
311 t = &cur_time_params;
314 /* update the flight model */
315 if ( multi_loop < 0 ) {
316 multi_loop = DEFAULT_MULTILOOP;
319 /* printf("updating flight model x %d\n", multi_loop); */
320 fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
322 /* refresh shared sun position and sun_vec */
323 fgUpdateSunPos(scenery.center);
325 /* update the view angle */
326 for ( i = 0; i < multi_loop; i++ ) {
327 if ( fabs(v->goal_view_offset - v->view_offset) < 0.05 ) {
328 v->view_offset = v->goal_view_offset;
331 /* move v->view_offset towards v->goal_view_offset */
332 if ( v->goal_view_offset > v->view_offset ) {
333 if ( v->goal_view_offset - v->view_offset < FG_PI ) {
334 v->view_offset += 0.01;
336 v->view_offset -= 0.01;
339 if ( v->view_offset - v->goal_view_offset < FG_PI ) {
340 v->view_offset -= 0.01;
342 v->view_offset += 0.01;
345 if ( v->view_offset > FG_2PI ) {
346 v->view_offset -= FG_2PI;
347 } else if ( v->view_offset < 0 ) {
348 v->view_offset += FG_2PI;
355 void fgInitTimeDepCalcs() {
356 /* initialize timer */
359 fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
365 /**************************************************************************
366 * Scenery management routines
367 **************************************************************************/
369 /* static void fgSceneryInit_OLD() { */
371 /* scenery = fgSceneryCompile_OLD();
372 runway = fgRunwayHack_OLD(0.69, 53.07);
376 /* create the scenery */
377 /* GLint fgSceneryCompile_OLD() {
380 scenery = mesh2GL(mesh_ptr_OLD);
386 /* hack in a runway */
387 /* GLint fgRunwayHack_OLD(double width, double length) {
388 static GLfloat concrete[4] = { 0.5, 0.5, 0.5, 1.0 };
389 static GLfloat line[4] = { 0.9, 0.9, 0.9, 1.0 };
392 float line_len, line_width_2, cur_pos;
394 runway = xglGenLists(1);
395 xglNewList(runway, GL_COMPILE);
398 /* xglBegin(GL_POLYGON);
399 xglMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, concrete );
400 xglNormal3f(0.0, 0.0, 1.0);
402 xglVertex3d( 0.0, -width/2.0, 0.0);
403 xglVertex3d( 0.0, width/2.0, 0.0);
404 xglVertex3d(length, width/2.0, 0.0);
405 xglVertex3d(length, -width/2.0, 0.0);
408 /* draw center line */
409 /* xglMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, line );
410 line_len = length / ( 2 * num_lines + 1);
411 printf("line_len = %.3f\n", line_len);
414 for ( i = 0; i < num_lines; i++ ) {
415 xglBegin(GL_POLYGON);
416 xglVertex3d( cur_pos, -line_width_2, 0.005);
417 xglVertex3d( cur_pos, line_width_2, 0.005);
419 xglVertex3d( cur_pos, line_width_2, 0.005);
420 xglVertex3d( cur_pos, -line_width_2, 0.005);
431 /* draw the scenery */
432 /*static void fgSceneryDraw_OLD() {
433 static float z = 32.35;
437 xglCallList(scenery);
439 printf("*** Drawing runway at %.2f\n", z);
441 xglTranslatef( -398391.28, 120070.41, 32.35);
442 xglRotatef(170.0, 0.0, 0.0, 1.0);
449 /* What should we do when we have nothing else to do? How about get
450 * ready for the next move and update the display? */
451 static void fgMainLoop( void ) {
452 static int remainder = 0;
453 int elapsed, multi_loop;
457 struct fgAIRCRAFT *a;
461 a = ¤t_aircraft;
463 t = &cur_time_params;
469 /* fgJoystickRead( &joy_x, &joy_y, &joy_b1, &joy_b2 );
470 printf( "Joystick X %f Y %f B1 %d B2 %d\n",
471 joy_x, joy_y, joy_b1, joy_b2 );
473 fgAileronSet( joy_x ); */
475 /* update the weather for our current position */
476 fgWeatherUpdate(FG_Longitude * RAD_TO_ARCSEC,
477 FG_Latitude * RAD_TO_ARCSEC,
478 FG_Altitude * FEET_TO_METER);
480 /* Calculate model iterations needed */
481 elapsed = fgGetTimeInterval();
482 printf("Time interval is = %d, previous remainder is = %d\n", elapsed,
484 printf("--> Frame rate is = %.2f\n", 1000.0 / (float)elapsed);
485 elapsed += remainder;
487 multi_loop = ((float)elapsed * 0.001) * DEFAULT_MODEL_HZ;
488 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
489 printf("Model iterations needed = %d, new remainder = %d\n", multi_loop,
492 if ( ! use_signals ) {
494 fgUpdateTimeDepCalcs(multi_loop);
497 /* I'm just sticking this here for now, it should probably move
499 cur_elev = mesh_altitude(FG_Longitude * RAD_TO_ARCSEC,
500 FG_Latitude * RAD_TO_ARCSEC);
501 printf("Ground elevation is %.2f meters here.\n", cur_elev);
502 /* FG_Runway_altitude = cur_elev * METER_TO_FEET; */
504 if ( FG_Altitude * FEET_TO_METER < cur_elev + 3.758099) {
505 /* set this here, otherwise if we set runway height above our
506 current height we get a really nasty bounce. */
507 FG_Runway_altitude = FG_Altitude - 3.758099;
509 /* now set aircraft altitude above ground */
510 FG_Altitude = cur_elev * METER_TO_FEET + 3.758099;
511 printf("<*> resetting altitude to %.0f meters\n",
512 FG_Altitude * FEET_TO_METER);
515 fgAircraftOutputCurrent(a);
522 /**************************************************************************
523 * Handle new window size or exposure
524 **************************************************************************/
526 static void fgReshape( int width, int height ) {
527 /* Do this so we can call fgReshape(0,0) ourselves without having to know
528 * what the values of width & height are. */
529 if ( (height > 0) && (width > 0) ) {
530 win_ratio = (GLfloat) height / (GLfloat) width;
533 /* Inform gl of our view window size */
534 xglViewport(0, 0, (GLint)width, (GLint)height);
536 fgUpdateViewParams();
538 /* xglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); */
542 /**************************************************************************
544 **************************************************************************/
546 int main( int argc, char *argv[] ) {
549 f = ¤t_aircraft.flight;
551 printf("Flight Gear: prototype version %s\n\n", VERSION);
553 /**********************************************************************
554 * Initialize the Window/Graphics environment.
555 **********************************************************************/
558 /* initialize GLUT */
559 xglutInit(&argc, argv);
561 /* Define Display Parameters */
562 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
564 /* Define initial window size */
565 xglutInitWindowSize(640, 480);
567 /* Initialize windows */
568 xglutCreateWindow("Flight Gear");
571 /* This is the general house keeping init routine */
574 /* This is the top level init routine which calls all the other
575 * subsystem initialization routines. If you are adding a
576 * subsystem to flight gear, its initialization call should
577 * located in this routine.*/
580 /* setup view parameters, only makes GL calls */
584 /* init timer routines, signals, etc. Arrange for an alarm
585 signal to be generated, etc. */
586 fgInitTimeDepCalcs();
589 /**********************************************************************
590 * Initialize the Event Handlers.
591 **********************************************************************/
594 /* call fgReshape() on window resizes */
595 xglutReshapeFunc( fgReshape );
597 /* call key() on keyboard event */
598 xglutKeyboardFunc( GLUTkey );
599 glutSpecialFunc( GLUTspecialkey );
601 /* call fgMainLoop() whenever there is nothing else to do */
602 xglutIdleFunc( fgMainLoop );
605 xglutDisplayFunc( fgRenderFrame );
607 /* pass control off to the GLUT event handler */
617 int printf (const char *format, ...) {
623 /* Revision 1.38 1997/12/22 04:14:28 curt
624 /* Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
626 * Revision 1.37 1997/12/19 23:34:03 curt
627 * Lot's of tweaking with sky rendering and lighting.
629 * Revision 1.36 1997/12/19 16:44:57 curt
630 * Working on scene rendering order and options.
632 * Revision 1.35 1997/12/18 23:32:32 curt
633 * First stab at sky dome actually starting to look reasonable. :-)
635 * Revision 1.34 1997/12/17 23:13:34 curt
636 * Began working on rendering a sky.
638 * Revision 1.33 1997/12/15 23:54:45 curt
639 * Add xgl wrappers for debugging.
640 * Generate terrain normals on the fly.
642 * Revision 1.32 1997/12/15 20:59:08 curt
645 * Revision 1.31 1997/12/12 21:41:25 curt
646 * More light/material property tweaking ... still a ways off.
648 * Revision 1.30 1997/12/12 19:52:47 curt
649 * Working on lightling and material properties.
651 * Revision 1.29 1997/12/11 04:43:54 curt
652 * Fixed sun vector and lighting problems. I thing the moon is now lit
655 * Revision 1.28 1997/12/10 22:37:45 curt
656 * Prepended "fg" on the name of all global structures that didn't have it yet.
657 * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
659 * Revision 1.27 1997/12/09 05:11:54 curt
660 * Working on tweaking lighting.
662 * Revision 1.26 1997/12/09 04:25:29 curt
663 * Working on adding a global lighting params structure.
665 * Revision 1.25 1997/12/08 22:54:09 curt
666 * Enabled GL_CULL_FACE.
668 * Revision 1.24 1997/11/25 19:25:32 curt
669 * Changes to integrate Durk's moon/sun code updates + clean up.
671 * Revision 1.23 1997/11/15 18:16:34 curt
674 * Revision 1.22 1997/10/30 12:38:41 curt
675 * Working on new scenery subsystem.
677 * Revision 1.21 1997/09/23 00:29:38 curt
678 * Tweaks to get things to compile with gcc-win32.
680 * Revision 1.20 1997/09/22 14:44:19 curt
681 * Continuing to try to align stars correctly.
683 * Revision 1.19 1997/09/18 16:20:08 curt
684 * At dusk/dawn add/remove stars in stages.
686 * Revision 1.18 1997/09/16 22:14:51 curt
687 * Tweaked time of day lighting equations. Don't draw stars during the day.
689 * Revision 1.17 1997/09/16 15:50:29 curt
690 * Working on star alignment and time issues.
692 * Revision 1.16 1997/09/13 02:00:06 curt
693 * Mostly working on stars and generating sidereal time for accurate star
696 * Revision 1.15 1997/09/05 14:17:27 curt
697 * More tweaking with stars.
699 * Revision 1.14 1997/09/05 01:35:53 curt
700 * Working on getting stars right.
702 * Revision 1.13 1997/09/04 02:17:34 curt
705 * Revision 1.12 1997/08/27 21:32:24 curt
706 * Restructured view calculation code. Added stars.
708 * Revision 1.11 1997/08/27 03:30:16 curt
709 * Changed naming scheme of basic shared structures.
711 * Revision 1.10 1997/08/25 20:27:22 curt
712 * Merged in initial HUD and Joystick code.
714 * Revision 1.9 1997/08/22 21:34:39 curt
715 * Doing a bit of reorganizing and house cleaning.
717 * Revision 1.8 1997/08/19 23:55:03 curt
718 * Worked on better simulating real lighting.
720 * Revision 1.7 1997/08/16 12:22:38 curt
721 * Working on improving the lighting/shading.
723 * Revision 1.6 1997/08/13 20:24:56 curt
724 * Changes due to changing sunpos interface.
726 * Revision 1.5 1997/08/06 21:08:32 curt
727 * Sun position now *really* works (I think) ... I still have sun time warping
728 * code in place, probably should remove it soon.
730 * Revision 1.4 1997/08/06 15:41:26 curt
731 * Working on correct sun position.
733 * Revision 1.3 1997/08/06 00:24:22 curt
734 * Working on correct real time sun lighting.
736 * Revision 1.2 1997/08/04 20:25:15 curt
737 * Organizational tweaking.
739 * Revision 1.1 1997/08/02 18:45:00 curt
740 * Renamed GLmain.c GLUTmain.c
742 * Revision 1.43 1997/08/02 16:23:47 curt
745 * Revision 1.42 1997/08/01 19:43:33 curt
746 * Making progress with coordinate system overhaul.
748 * Revision 1.41 1997/07/31 22:52:37 curt
749 * Working on redoing internal coordinate systems & scenery transformations.
751 * Revision 1.40 1997/07/30 16:12:42 curt
752 * Moved fg_random routines from Util/ to Math/
754 * Revision 1.39 1997/07/21 14:45:01 curt
757 * Revision 1.38 1997/07/19 23:04:47 curt
758 * Added an initial weather section.
760 * Revision 1.37 1997/07/19 22:34:02 curt
761 * Moved PI definitions to ../constants.h
762 * Moved random() stuff to ../Utils/ and renamed fg_random()
764 * Revision 1.36 1997/07/18 23:41:25 curt
765 * Tweaks for building with Cygnus Win32 compiler.
767 * Revision 1.35 1997/07/18 14:28:34 curt
768 * Hacked in some support for wind/turbulence.
770 * Revision 1.34 1997/07/16 20:04:48 curt
771 * Minor tweaks to aid Win32 port.
773 * Revision 1.33 1997/07/12 03:50:20 curt
774 * Added an #include <Windows32/Base.h> to help compiling for Win32
776 * Revision 1.32 1997/07/11 03:23:18 curt
777 * Solved some scenery display/orientation problems. Still have a positioning
778 * (or transformation?) problem.
780 * Revision 1.31 1997/07/11 01:29:58 curt
781 * More tweaking of terrian floor.
783 * Revision 1.30 1997/07/10 04:26:37 curt
784 * We now can interpolated ground elevation for any position in the grid. We
785 * can use this to enforce a "hard" ground. We still need to enforce some
786 * bounds checking so that we don't try to lookup data points outside the
789 * Revision 1.29 1997/07/09 21:31:12 curt
790 * Working on making the ground "hard."
792 * Revision 1.28 1997/07/08 18:20:12 curt
793 * Working on establishing a hard ground.
795 * Revision 1.27 1997/07/07 20:59:49 curt
796 * Working on scenery transformations to enable us to fly fluidly over the
797 * poles with no discontinuity/distortion in scenery.
799 * Revision 1.26 1997/07/05 20:43:34 curt
800 * renamed mat3 directory to Math so we could add other math related routines.
802 * Revision 1.25 1997/06/29 21:19:17 curt
803 * Working on scenery management system.
805 * Revision 1.24 1997/06/26 22:14:53 curt
806 * Beginning work on a scenery management system.
808 * Revision 1.23 1997/06/26 19:08:33 curt
809 * Restructuring make, adding automatic "make dep" support.
811 * Revision 1.22 1997/06/25 15:39:47 curt
812 * Minor changes to compile with rsxnt/win32.
814 * Revision 1.21 1997/06/22 21:44:41 curt
815 * Working on intergrating the VRML (subset) parser.
817 * Revision 1.20 1997/06/21 17:12:53 curt
818 * Capitalized subdirectory names.
820 * Revision 1.19 1997/06/18 04:10:31 curt
821 * A couple more runway tweaks ...
823 * Revision 1.18 1997/06/18 02:21:24 curt
826 * Revision 1.17 1997/06/17 16:51:58 curt
827 * Timer interval stuff now uses gettimeofday() instead of ftime()
829 * Revision 1.16 1997/06/17 04:19:16 curt
830 * More timer related tweaks with respect to view direction changes.
832 * Revision 1.15 1997/06/17 03:41:10 curt
833 * Nonsignal based interval timing is now working.
834 * This would be a good time to look at cleaning up the code structure a bit.
836 * Revision 1.14 1997/06/16 19:32:51 curt
837 * Starting to add general timer support.
839 * Revision 1.13 1997/06/02 03:40:06 curt
840 * A tiny bit more view tweaking.
842 * Revision 1.12 1997/06/02 03:01:38 curt
843 * Working on views (side, front, back, transitions, etc.)
845 * Revision 1.11 1997/05/31 19:16:25 curt
846 * Elevator trim added.
848 * Revision 1.10 1997/05/31 04:13:52 curt
851 * Continuing work on the LaRCsim flight model integration.
852 * Added some MSFS-like keyboard input handling.
854 * Revision 1.9 1997/05/30 19:27:01 curt
855 * The LaRCsim flight model is starting to look like it is working.
857 * Revision 1.8 1997/05/30 03:54:10 curt
858 * Made a bit more progress towards integrating the LaRCsim flight model.
860 * Revision 1.7 1997/05/29 22:39:49 curt
861 * Working on incorporating the LaRCsim flight model.
863 * Revision 1.6 1997/05/29 12:31:39 curt
864 * Minor tweaks, moving towards general flight model integration.
866 * Revision 1.5 1997/05/29 02:33:23 curt
867 * Updated to reflect changing interfaces in other "modules."
869 * Revision 1.4 1997/05/27 17:44:31 curt
870 * Renamed & rearranged variables and routines. Added some initial simple
871 * timer/alarm routines so the flight model can be updated on a regular
874 * Revision 1.3 1997/05/23 15:40:25 curt
875 * Added GNU copyright headers.
878 * Revision 1.2 1997/05/23 00:35:12 curt
879 * Trying to get fog to work ...
881 * Revision 1.1 1997/05/21 15:57:51 curt
882 * Renamed due to added GLUT support.
884 * Revision 1.3 1997/05/19 18:22:42 curt
885 * Parameter tweaking ... starting to stub in fog support.
887 * Revision 1.2 1997/05/17 00:17:34 curt
888 * Trying to stub in support for standard OpenGL.
890 * Revision 1.1 1997/05/16 16:05:52 curt