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_NICEST /* 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 = 0.2 * 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];
213 /* mental note: this should really be done every 10-30 seconds I suppose */
218 /**************************************************************************
219 * Update all Visuals (redraws anything graphics related)
220 **************************************************************************/
222 static void fgRenderFrame( void ) {
227 static double lastAstroUpdate = 0;
228 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
230 l = &cur_light_params;
231 t = &cur_time_params;
234 /* update view volume parameters */
235 fgUpdateViewParams();
237 xglClear( GL_DEPTH_BUFFER_BIT /* | GL_COLOR_BUFFER_BIT */ );
239 /* Tell GL we are switching to model view parameters */
240 xglMatrixMode(GL_MODELVIEW);
241 /* xglLoadIdentity(); */
244 xglDisable( GL_DEPTH_TEST );
245 xglDisable( GL_LIGHTING );
246 xglDisable( GL_CULL_FACE );
247 xglDisable( GL_FOG );
248 xglShadeModel( GL_SMOOTH );
251 /* a hack: Force sun and moon position to be updated on an hourly basis */
252 if (((t->gst - lastAstroUpdate) > 1) || (t->gst < lastAstroUpdate)) {
253 lastAstroUpdate = t->gst;
258 /* setup transformation for drawing astronomical objects */
260 /* Translate to view position */
261 xglTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
262 /* Rotate based on gst (side real time) */
263 angle = t->gst * 15.041085; /* should be 15.041085, Curt thought it was 15*/
264 /* printf("Rotating astro objects by %.2f degrees\n",angle); */
265 xglRotatef( angle, 0.0, 0.0, -1.0 );
267 /* draw stars and planets */
273 /* render the moon */
274 xglEnable( GL_LIGHTING );
275 /* set lighting parameters */
276 xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
277 xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
278 xglEnable( GL_CULL_FACE );
284 xglShadeModel( GL_SMOOTH );
285 xglEnable( GL_DEPTH_TEST );
287 xglFogfv (GL_FOG_COLOR, l->fog_color);
288 /* set lighting parameters */
289 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
290 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
295 fgCockpitUpdate(); */
303 /**************************************************************************
304 * Update internal time dependent calculations (i.e. flight model)
305 **************************************************************************/
307 void fgUpdateTimeDepCalcs(int multi_loop) {
313 f = ¤t_aircraft.flight;
314 t = &cur_time_params;
317 /* update the flight model */
318 if ( multi_loop < 0 ) {
319 multi_loop = DEFAULT_MULTILOOP;
322 /* printf("updating flight model x %d\n", multi_loop); */
323 fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
325 /* refresh shared sun position and sun_vec */
326 fgUpdateSunPos(scenery.center);
328 /* update the view angle */
329 for ( i = 0; i < multi_loop; i++ ) {
330 if ( fabs(v->goal_view_offset - v->view_offset) < 0.05 ) {
331 v->view_offset = v->goal_view_offset;
334 /* move v->view_offset towards v->goal_view_offset */
335 if ( v->goal_view_offset > v->view_offset ) {
336 if ( v->goal_view_offset - v->view_offset < FG_PI ) {
337 v->view_offset += 0.01;
339 v->view_offset -= 0.01;
342 if ( v->view_offset - v->goal_view_offset < FG_PI ) {
343 v->view_offset -= 0.01;
345 v->view_offset += 0.01;
348 if ( v->view_offset > FG_2PI ) {
349 v->view_offset -= FG_2PI;
350 } else if ( v->view_offset < 0 ) {
351 v->view_offset += FG_2PI;
358 void fgInitTimeDepCalcs() {
359 /* initialize timer */
362 fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
368 /**************************************************************************
369 * Scenery management routines
370 **************************************************************************/
372 /* static void fgSceneryInit_OLD() { */
374 /* scenery = fgSceneryCompile_OLD();
375 runway = fgRunwayHack_OLD(0.69, 53.07);
379 /* create the scenery */
380 /* GLint fgSceneryCompile_OLD() {
383 scenery = mesh2GL(mesh_ptr_OLD);
389 /* hack in a runway */
390 /* GLint fgRunwayHack_OLD(double width, double length) {
391 static GLfloat concrete[4] = { 0.5, 0.5, 0.5, 1.0 };
392 static GLfloat line[4] = { 0.9, 0.9, 0.9, 1.0 };
395 float line_len, line_width_2, cur_pos;
397 runway = xglGenLists(1);
398 xglNewList(runway, GL_COMPILE);
401 /* xglBegin(GL_POLYGON);
402 xglMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, concrete );
403 xglNormal3f(0.0, 0.0, 1.0);
405 xglVertex3d( 0.0, -width/2.0, 0.0);
406 xglVertex3d( 0.0, width/2.0, 0.0);
407 xglVertex3d(length, width/2.0, 0.0);
408 xglVertex3d(length, -width/2.0, 0.0);
411 /* draw center line */
412 /* xglMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, line );
413 line_len = length / ( 2 * num_lines + 1);
414 printf("line_len = %.3f\n", line_len);
417 for ( i = 0; i < num_lines; i++ ) {
418 xglBegin(GL_POLYGON);
419 xglVertex3d( cur_pos, -line_width_2, 0.005);
420 xglVertex3d( cur_pos, line_width_2, 0.005);
422 xglVertex3d( cur_pos, line_width_2, 0.005);
423 xglVertex3d( cur_pos, -line_width_2, 0.005);
434 /* draw the scenery */
435 /*static void fgSceneryDraw_OLD() {
436 static float z = 32.35;
440 xglCallList(scenery);
442 printf("*** Drawing runway at %.2f\n", z);
444 xglTranslatef( -398391.28, 120070.41, 32.35);
445 xglRotatef(170.0, 0.0, 0.0, 1.0);
452 /* What should we do when we have nothing else to do? How about get
453 * ready for the next move and update the display? */
454 static void fgMainLoop( void ) {
455 static int remainder = 0;
456 int elapsed, multi_loop;
460 struct fgAIRCRAFT *a;
464 a = ¤t_aircraft;
466 t = &cur_time_params;
472 /* fgJoystickRead( &joy_x, &joy_y, &joy_b1, &joy_b2 );
473 printf( "Joystick X %f Y %f B1 %d B2 %d\n",
474 joy_x, joy_y, joy_b1, joy_b2 );
476 fgAileronSet( joy_x ); */
478 /* update the weather for our current position */
479 fgWeatherUpdate(FG_Longitude * RAD_TO_ARCSEC,
480 FG_Latitude * RAD_TO_ARCSEC,
481 FG_Altitude * FEET_TO_METER);
483 /* Calculate model iterations needed */
484 elapsed = fgGetTimeInterval();
485 printf("Time interval is = %d, previous remainder is = %d\n", elapsed,
487 printf("--> Frame rate is = %.2f\n", 1000.0 / (float)elapsed);
488 elapsed += remainder;
490 multi_loop = ((float)elapsed * 0.001) * DEFAULT_MODEL_HZ;
491 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
492 printf("Model iterations needed = %d, new remainder = %d\n", multi_loop,
495 if ( ! use_signals ) {
497 fgUpdateTimeDepCalcs(multi_loop);
500 /* I'm just sticking this here for now, it should probably move
502 cur_elev = mesh_altitude(FG_Longitude * RAD_TO_ARCSEC,
503 FG_Latitude * RAD_TO_ARCSEC);
504 printf("Ground elevation is %.2f meters here.\n", cur_elev);
505 /* FG_Runway_altitude = cur_elev * METER_TO_FEET; */
507 if ( FG_Altitude * FEET_TO_METER < cur_elev + 3.758099) {
508 /* set this here, otherwise if we set runway height above our
509 current height we get a really nasty bounce. */
510 FG_Runway_altitude = FG_Altitude - 3.758099;
512 /* now set aircraft altitude above ground */
513 FG_Altitude = cur_elev * METER_TO_FEET + 3.758099;
514 printf("<*> resetting altitude to %.0f meters\n",
515 FG_Altitude * FEET_TO_METER);
518 fgAircraftOutputCurrent(a);
525 /**************************************************************************
526 * Handle new window size or exposure
527 **************************************************************************/
529 static void fgReshape( int width, int height ) {
530 /* Do this so we can call fgReshape(0,0) ourselves without having to know
531 * what the values of width & height are. */
532 if ( (height > 0) && (width > 0) ) {
533 win_ratio = (GLfloat) height / (GLfloat) width;
536 /* Inform gl of our view window size */
537 xglViewport(0, 0, (GLint)width, (GLint)height);
539 fgUpdateViewParams();
541 /* xglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); */
545 /**************************************************************************
547 **************************************************************************/
549 int main( int argc, char *argv[] ) {
552 f = ¤t_aircraft.flight;
554 printf("Flight Gear: prototype version %s\n\n", VERSION);
556 /**********************************************************************
557 * Initialize the Window/Graphics environment.
558 **********************************************************************/
561 /* initialize GLUT */
562 xglutInit(&argc, argv);
564 /* Define Display Parameters */
565 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
567 /* Define initial window size */
568 xglutInitWindowSize(640, 480);
570 /* Initialize windows */
571 xglutCreateWindow("Flight Gear");
574 /* This is the general house keeping init routine */
577 /* This is the top level init routine which calls all the other
578 * subsystem initialization routines. If you are adding a
579 * subsystem to flight gear, its initialization call should
580 * located in this routine.*/
583 /* setup view parameters, only makes GL calls */
587 /* init timer routines, signals, etc. Arrange for an alarm
588 signal to be generated, etc. */
589 fgInitTimeDepCalcs();
592 /**********************************************************************
593 * Initialize the Event Handlers.
594 **********************************************************************/
597 /* call fgReshape() on window resizes */
598 xglutReshapeFunc( fgReshape );
600 /* call key() on keyboard event */
601 xglutKeyboardFunc( GLUTkey );
602 glutSpecialFunc( GLUTspecialkey );
604 /* call fgMainLoop() whenever there is nothing else to do */
605 xglutIdleFunc( fgMainLoop );
608 xglutDisplayFunc( fgRenderFrame );
610 /* pass control off to the GLUT event handler */
620 int printf (const char *format, ...) {
626 /* Revision 1.40 1997/12/30 01:38:37 curt
627 /* Switched back to per vertex normals and smooth shading for terrain.
629 * Revision 1.39 1997/12/22 23:45:45 curt
630 * First stab at sunset/sunrise sky glow effects.
632 * Revision 1.38 1997/12/22 04:14:28 curt
633 * Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
635 * Revision 1.37 1997/12/19 23:34:03 curt
636 * Lot's of tweaking with sky rendering and lighting.
638 * Revision 1.36 1997/12/19 16:44:57 curt
639 * Working on scene rendering order and options.
641 * Revision 1.35 1997/12/18 23:32:32 curt
642 * First stab at sky dome actually starting to look reasonable. :-)
644 * Revision 1.34 1997/12/17 23:13:34 curt
645 * Began working on rendering a sky.
647 * Revision 1.33 1997/12/15 23:54:45 curt
648 * Add xgl wrappers for debugging.
649 * Generate terrain normals on the fly.
651 * Revision 1.32 1997/12/15 20:59:08 curt
654 * Revision 1.31 1997/12/12 21:41:25 curt
655 * More light/material property tweaking ... still a ways off.
657 * Revision 1.30 1997/12/12 19:52:47 curt
658 * Working on lightling and material properties.
660 * Revision 1.29 1997/12/11 04:43:54 curt
661 * Fixed sun vector and lighting problems. I thing the moon is now lit
664 * Revision 1.28 1997/12/10 22:37:45 curt
665 * Prepended "fg" on the name of all global structures that didn't have it yet.
666 * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
668 * Revision 1.27 1997/12/09 05:11:54 curt
669 * Working on tweaking lighting.
671 * Revision 1.26 1997/12/09 04:25:29 curt
672 * Working on adding a global lighting params structure.
674 * Revision 1.25 1997/12/08 22:54:09 curt
675 * Enabled GL_CULL_FACE.
677 * Revision 1.24 1997/11/25 19:25:32 curt
678 * Changes to integrate Durk's moon/sun code updates + clean up.
680 * Revision 1.23 1997/11/15 18:16:34 curt
683 * Revision 1.22 1997/10/30 12:38:41 curt
684 * Working on new scenery subsystem.
686 * Revision 1.21 1997/09/23 00:29:38 curt
687 * Tweaks to get things to compile with gcc-win32.
689 * Revision 1.20 1997/09/22 14:44:19 curt
690 * Continuing to try to align stars correctly.
692 * Revision 1.19 1997/09/18 16:20:08 curt
693 * At dusk/dawn add/remove stars in stages.
695 * Revision 1.18 1997/09/16 22:14:51 curt
696 * Tweaked time of day lighting equations. Don't draw stars during the day.
698 * Revision 1.17 1997/09/16 15:50:29 curt
699 * Working on star alignment and time issues.
701 * Revision 1.16 1997/09/13 02:00:06 curt
702 * Mostly working on stars and generating sidereal time for accurate star
705 * Revision 1.15 1997/09/05 14:17:27 curt
706 * More tweaking with stars.
708 * Revision 1.14 1997/09/05 01:35:53 curt
709 * Working on getting stars right.
711 * Revision 1.13 1997/09/04 02:17:34 curt
714 * Revision 1.12 1997/08/27 21:32:24 curt
715 * Restructured view calculation code. Added stars.
717 * Revision 1.11 1997/08/27 03:30:16 curt
718 * Changed naming scheme of basic shared structures.
720 * Revision 1.10 1997/08/25 20:27:22 curt
721 * Merged in initial HUD and Joystick code.
723 * Revision 1.9 1997/08/22 21:34:39 curt
724 * Doing a bit of reorganizing and house cleaning.
726 * Revision 1.8 1997/08/19 23:55:03 curt
727 * Worked on better simulating real lighting.
729 * Revision 1.7 1997/08/16 12:22:38 curt
730 * Working on improving the lighting/shading.
732 * Revision 1.6 1997/08/13 20:24:56 curt
733 * Changes due to changing sunpos interface.
735 * Revision 1.5 1997/08/06 21:08:32 curt
736 * Sun position now *really* works (I think) ... I still have sun time warping
737 * code in place, probably should remove it soon.
739 * Revision 1.4 1997/08/06 15:41:26 curt
740 * Working on correct sun position.
742 * Revision 1.3 1997/08/06 00:24:22 curt
743 * Working on correct real time sun lighting.
745 * Revision 1.2 1997/08/04 20:25:15 curt
746 * Organizational tweaking.
748 * Revision 1.1 1997/08/02 18:45:00 curt
749 * Renamed GLmain.c GLUTmain.c
751 * Revision 1.43 1997/08/02 16:23:47 curt
754 * Revision 1.42 1997/08/01 19:43:33 curt
755 * Making progress with coordinate system overhaul.
757 * Revision 1.41 1997/07/31 22:52:37 curt
758 * Working on redoing internal coordinate systems & scenery transformations.
760 * Revision 1.40 1997/07/30 16:12:42 curt
761 * Moved fg_random routines from Util/ to Math/
763 * Revision 1.39 1997/07/21 14:45:01 curt
766 * Revision 1.38 1997/07/19 23:04:47 curt
767 * Added an initial weather section.
769 * Revision 1.37 1997/07/19 22:34:02 curt
770 * Moved PI definitions to ../constants.h
771 * Moved random() stuff to ../Utils/ and renamed fg_random()
773 * Revision 1.36 1997/07/18 23:41:25 curt
774 * Tweaks for building with Cygnus Win32 compiler.
776 * Revision 1.35 1997/07/18 14:28:34 curt
777 * Hacked in some support for wind/turbulence.
779 * Revision 1.34 1997/07/16 20:04:48 curt
780 * Minor tweaks to aid Win32 port.
782 * Revision 1.33 1997/07/12 03:50:20 curt
783 * Added an #include <Windows32/Base.h> to help compiling for Win32
785 * Revision 1.32 1997/07/11 03:23:18 curt
786 * Solved some scenery display/orientation problems. Still have a positioning
787 * (or transformation?) problem.
789 * Revision 1.31 1997/07/11 01:29:58 curt
790 * More tweaking of terrian floor.
792 * Revision 1.30 1997/07/10 04:26:37 curt
793 * We now can interpolated ground elevation for any position in the grid. We
794 * can use this to enforce a "hard" ground. We still need to enforce some
795 * bounds checking so that we don't try to lookup data points outside the
798 * Revision 1.29 1997/07/09 21:31:12 curt
799 * Working on making the ground "hard."
801 * Revision 1.28 1997/07/08 18:20:12 curt
802 * Working on establishing a hard ground.
804 * Revision 1.27 1997/07/07 20:59:49 curt
805 * Working on scenery transformations to enable us to fly fluidly over the
806 * poles with no discontinuity/distortion in scenery.
808 * Revision 1.26 1997/07/05 20:43:34 curt
809 * renamed mat3 directory to Math so we could add other math related routines.
811 * Revision 1.25 1997/06/29 21:19:17 curt
812 * Working on scenery management system.
814 * Revision 1.24 1997/06/26 22:14:53 curt
815 * Beginning work on a scenery management system.
817 * Revision 1.23 1997/06/26 19:08:33 curt
818 * Restructuring make, adding automatic "make dep" support.
820 * Revision 1.22 1997/06/25 15:39:47 curt
821 * Minor changes to compile with rsxnt/win32.
823 * Revision 1.21 1997/06/22 21:44:41 curt
824 * Working on intergrating the VRML (subset) parser.
826 * Revision 1.20 1997/06/21 17:12:53 curt
827 * Capitalized subdirectory names.
829 * Revision 1.19 1997/06/18 04:10:31 curt
830 * A couple more runway tweaks ...
832 * Revision 1.18 1997/06/18 02:21:24 curt
835 * Revision 1.17 1997/06/17 16:51:58 curt
836 * Timer interval stuff now uses gettimeofday() instead of ftime()
838 * Revision 1.16 1997/06/17 04:19:16 curt
839 * More timer related tweaks with respect to view direction changes.
841 * Revision 1.15 1997/06/17 03:41:10 curt
842 * Nonsignal based interval timing is now working.
843 * This would be a good time to look at cleaning up the code structure a bit.
845 * Revision 1.14 1997/06/16 19:32:51 curt
846 * Starting to add general timer support.
848 * Revision 1.13 1997/06/02 03:40:06 curt
849 * A tiny bit more view tweaking.
851 * Revision 1.12 1997/06/02 03:01:38 curt
852 * Working on views (side, front, back, transitions, etc.)
854 * Revision 1.11 1997/05/31 19:16:25 curt
855 * Elevator trim added.
857 * Revision 1.10 1997/05/31 04:13:52 curt
860 * Continuing work on the LaRCsim flight model integration.
861 * Added some MSFS-like keyboard input handling.
863 * Revision 1.9 1997/05/30 19:27:01 curt
864 * The LaRCsim flight model is starting to look like it is working.
866 * Revision 1.8 1997/05/30 03:54:10 curt
867 * Made a bit more progress towards integrating the LaRCsim flight model.
869 * Revision 1.7 1997/05/29 22:39:49 curt
870 * Working on incorporating the LaRCsim flight model.
872 * Revision 1.6 1997/05/29 12:31:39 curt
873 * Minor tweaks, moving towards general flight model integration.
875 * Revision 1.5 1997/05/29 02:33:23 curt
876 * Updated to reflect changing interfaces in other "modules."
878 * Revision 1.4 1997/05/27 17:44:31 curt
879 * Renamed & rearranged variables and routines. Added some initial simple
880 * timer/alarm routines so the flight model can be updated on a regular
883 * Revision 1.3 1997/05/23 15:40:25 curt
884 * Added GNU copyright headers.
887 * Revision 1.2 1997/05/23 00:35:12 curt
888 * Trying to get fog to work ...
890 * Revision 1.1 1997/05/21 15:57:51 curt
891 * Renamed due to added GLUT support.
893 * Revision 1.3 1997/05/19 18:22:42 curt
894 * Parameter tweaking ... starting to stub in fog support.
896 * Revision 1.2 1997/05/17 00:17:34 curt
897 * Trying to stub in support for standard OpenGL.
899 * Revision 1.1 1997/05/16 16:05:52 curt