3 // GLUTmain.cxx -- top level sim routines
5 // Written by Curtis Olson for OpenGL, started May 1997.
7 // Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
9 // This program is free software; you can redistribute it and/or
10 // modify it under the terms of the GNU General Public License as
11 // published by the Free Software Foundation; either version 2 of the
12 // License, or (at your option) any later version.
14 // This program is distributed in the hope that it will be useful, but
15 // WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 // General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 // (Log is kept at end of this file)
45 #include <Include/fg_constants.h> // for VERSION
46 #include <Include/general.h>
48 #include <Aircraft/aircraft.h>
49 #include <Astro/moon.hxx>
50 #include <Astro/planets.hxx>
51 #include <Astro/sky.hxx>
52 #include <Astro/stars.hxx>
53 #include <Astro/sun.hxx>
55 #ifdef HAVE_AUDIO_SUPPORT
56 # include <Audio/src/sl.h>
57 # include <Audio/src/sm.h>
60 #include <Cockpit/cockpit.hxx>
61 #include <Debug/fg_debug.h>
63 #include <Joystick/joystick.h>
64 #include <Math/fg_geodesy.h>
65 #include <Math/mat3.h>
66 #include <Math/polar3d.h>
68 #include <Scenery/scenery.hxx>
69 #include <Scenery/tilemgr.hxx>
70 #include <Time/event.hxx>
71 #include <Time/fg_time.hxx>
72 #include <Time/fg_timer.hxx>
73 #include <Time/sunpos.hxx>
74 #include <Weather/weather.h>
76 #include "GLUTkey.hxx"
77 #include "fg_init.hxx"
78 #include "options.hxx"
82 // This is a record containing global housekeeping information
88 // Global structures for the Audio library
89 #ifdef HAVE_AUDIO_SUPPORT
90 slScheduler audio_sched ( 8000 ) ;
97 // The following defines flight gear options. Because glutlib will also
98 // want to parse its own options, those options must not be included here
99 // or they will get parsed by the main program option parser. Hence case
100 // is significant for any option added that might be in conflict with
103 // glutlib parses for:
105 // -direct (invalid in Win32)
109 // -indirect (invalid in Win32)
112 // Note that glutlib depends upon strings while this program's
113 // option parser wants only initial characters followed by numbers
118 // fgInitVisuals() -- Initialize various GL/view parameters
119 static void fgInitVisuals( void ) {
124 l = &cur_light_params;
125 o = ¤t_options;
126 w = ¤t_weather;
128 // Go full screen if requested ...
129 if ( o->fullscreen ) {
133 // If enabled, normal vectors specified with glNormal are scaled
134 // to unit length after transformation. See glNormal.
135 xglEnable( GL_NORMALIZE );
137 xglEnable( GL_LIGHTING );
138 xglEnable( GL_LIGHT0 );
139 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
141 // xglFogi (GL_FOG_MODE, GL_LINEAR);
142 xglFogi (GL_FOG_MODE, GL_EXP2);
143 // Fog density is now set when the weather system is initialized
144 // xglFogf (GL_FOG_DENSITY, w->fog_density);
145 if ( (o->fog == 1) || (o->shading == 0) ) {
146 // if fastest fog requested, or if flat shading force fastest
147 xglHint (GL_FOG_HINT, GL_FASTEST );
148 } else if ( o->fog == 2 ) {
149 xglHint (GL_FOG_HINT, GL_NICEST );
151 if ( o->wireframe ) {
153 xglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
156 // This is the default anyways, but it can't hurt
157 xglFrontFace ( GL_CCW );
161 // Update the view volume, position, and orientation
162 static void fgUpdateViewParams( void ) {
168 f = current_aircraft.flight;
169 l = &cur_light_params;
170 o = ¤t_options;
174 v->UpdateWorldToEye(f);
176 // if (!o->panel_status) {
177 // xglViewport( 0, (GLint)((v->winHeight) / 2 ) ,
178 // (GLint)(v->winWidth), (GLint)(v->winHeight) / 2 );
179 // Tell GL we are about to modify the projection parameters
180 // xglMatrixMode(GL_PROJECTION);
181 // xglLoadIdentity();
182 // gluPerspective(o->fov, v->win_ratio / 2.0, 1.0, 100000.0);
184 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) );
185 // Tell GL we are about to modify the projection parameters
186 xglMatrixMode(GL_PROJECTION);
188 gluPerspective(o->fov, v->win_ratio, 10.0, 100000.0);
191 xglMatrixMode(GL_MODELVIEW);
194 // set up our view volume (default)
195 gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
196 v->view_pos.x + v->view_forward[0],
197 v->view_pos.y + v->view_forward[1],
198 v->view_pos.z + v->view_forward[2],
199 v->view_up[0], v->view_up[1], v->view_up[2]);
201 // look almost straight up (testing and eclipse watching)
202 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
203 v->view_pos.x + v->view_up[0] + .001,
204 v->view_pos.y + v->view_up[1] + .001,
205 v->view_pos.z + v->view_up[2] + .001,
206 v->view_up[0], v->view_up[1], v->view_up[2]); */
208 // lock view horizontally towards sun (testing)
209 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
210 v->view_pos.x + v->surface_to_sun[0],
211 v->view_pos.y + v->surface_to_sun[1],
212 v->view_pos.z + v->surface_to_sun[2],
213 v->view_up[0], v->view_up[1], v->view_up[2]); */
215 // lock view horizontally towards south (testing)
216 /* gluLookAt(v->view_pos.x, v->view_pos.y, v->view_pos.z,
217 v->view_pos.x + v->surface_south[0],
218 v->view_pos.y + v->surface_south[1],
219 v->view_pos.z + v->surface_south[2],
220 v->view_up[0], v->view_up[1], v->view_up[2]); */
222 // set the sun position
223 xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
228 // Draw a basic instrument panel
229 static void fgUpdateInstrViewParams( void ) {
237 xglViewport(0, 0 , (GLint)(v->winWidth), (GLint)(v->winHeight) / 2);
239 xglMatrixMode(GL_PROJECTION);
243 gluOrtho2D(0, 640, 0, 480);
244 xglMatrixMode(GL_MODELVIEW);
248 xglColor3f(1.0, 1.0, 1.0);
251 xglDisable(GL_DEPTH_TEST);
252 xglDisable(GL_LIGHTING);
255 xglColor3f (0.5, 0.5, 0.5);
258 xglVertex2f(0.0, 0.00);
259 xglVertex2f(0.0, 480.0);
260 xglVertex2f(640.0,480.0);
261 xglVertex2f(640.0, 0.0);
264 xglRectf(0.0,0.0, 640, 480);
265 xglEnable(GL_DEPTH_TEST);
266 xglEnable(GL_LIGHTING);
267 xglMatrixMode(GL_PROJECTION);
269 xglMatrixMode(GL_MODELVIEW);
275 // Update all Visuals (redraws anything graphics related)
276 static void fgRenderFrame( void ) {
282 GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
283 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
284 GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
286 l = &cur_light_params;
287 o = ¤t_options;
288 t = &cur_time_params;
291 // this is just a temporary hack, to make me understand Pui
292 timerText -> setLabel (ctime (&t->cur_time));
295 // update view volume parameters
296 fgUpdateViewParams();
299 glClearColor(black[0], black[1], black[2], black[3]);
300 xglClear( GL_DEPTH_BUFFER_BIT );
302 glClearColor(l->sky_color[0], l->sky_color[1],
303 l->sky_color[2], l->sky_color[3]);
304 xglClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
307 // Tell GL we are switching to model view parameters
308 xglMatrixMode(GL_MODELVIEW);
309 // xglLoadIdentity();
312 xglDisable( GL_DEPTH_TEST );
313 xglDisable( GL_LIGHTING );
314 xglDisable( GL_CULL_FACE );
315 xglDisable( GL_FOG );
316 xglShadeModel( GL_SMOOTH );
321 // setup transformation for drawing astronomical objects
323 // Translate to view position
324 xglTranslatef( v->view_pos.x, v->view_pos.y, v->view_pos.z );
325 // Rotate based on gst (sidereal time)
326 angle = t->gst * 15.041085; /* should be 15.041085, Curt thought it was 15*/
327 // printf("Rotating astro objects by %.2f degrees\n",angle);
328 xglRotatef( angle, 0.0, 0.0, -1.0 );
330 // draw stars and planets
338 xglEnable( GL_LIGHTING );
339 // set lighting parameters
340 xglLightfv(GL_LIGHT0, GL_AMBIENT, white );
341 xglLightfv(GL_LIGHT0, GL_DIFFUSE, white );
342 xglEnable( GL_CULL_FACE );
344 // Let's try some blending technique's (Durk)
346 glBlendFunc(GL_ONE, GL_ONE);
354 xglShadeModel( GL_SMOOTH );
356 xglShadeModel( GL_FLAT );
358 xglEnable( GL_DEPTH_TEST );
361 xglFogfv (GL_FOG_COLOR, l->fog_color);
363 // set lighting parameters
364 xglLightfv(GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
365 xglLightfv(GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
368 // texture parameters
369 xglEnable( GL_TEXTURE_2D );
370 // set base color (I don't think this is doing anything here)
371 xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
372 xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
374 xglDisable( GL_TEXTURE_2D );
375 xglMaterialfv (GL_FRONT, GL_AMBIENT, terrain_color);
376 xglMaterialfv (GL_FRONT, GL_DIFFUSE, terrain_color);
377 // xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
378 // xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
383 xglDisable( GL_TEXTURE_2D );
385 // display HUD && Panel
388 // display instruments
389 // if (!o->panel_status) {
390 // fgUpdateInstrViewParams();
397 // Update internal time dependent calculations (i.e. flight model)
398 void fgUpdateTimeDepCalcs(int multi_loop) {
404 f = current_aircraft.flight;
405 t = &cur_time_params;
408 // update the flight model
409 if ( multi_loop < 0 ) {
410 multi_loop = DEFAULT_MULTILOOP;
413 // printf("updating flight model x %d\n", multi_loop);
414 fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
416 // update the view angle
417 for ( i = 0; i < multi_loop; i++ ) {
418 if ( fabs(v->goal_view_offset - v->view_offset) < 0.05 ) {
419 v->view_offset = v->goal_view_offset;
422 // move v->view_offset towards v->goal_view_offset
423 if ( v->goal_view_offset > v->view_offset ) {
424 if ( v->goal_view_offset - v->view_offset < FG_PI ) {
425 v->view_offset += 0.01;
427 v->view_offset -= 0.01;
430 if ( v->view_offset - v->goal_view_offset < FG_PI ) {
431 v->view_offset -= 0.01;
433 v->view_offset += 0.01;
436 if ( v->view_offset > FG_2PI ) {
437 v->view_offset -= FG_2PI;
438 } else if ( v->view_offset < 0 ) {
439 v->view_offset += FG_2PI;
446 void fgInitTimeDepCalcs( void ) {
449 #ifdef HAVE_SETITIMER
450 fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
451 #endif HAVE_SETITIMER
456 // What should we do when we have nothing else to do? Let's get ready
457 // for the next move and update the display?
458 static void fgMainLoop( void ) {
463 static int remainder = 0;
464 int elapsed, multi_loop;
468 // double joy_x, joy_y;
469 // int joy_b1, joy_b2;
471 a = ¤t_aircraft;
474 t = &cur_time_params;
476 fgPrintf( FG_ALL, FG_DEBUG, "Running Main Loop\n");
477 fgPrintf( FG_ALL, FG_DEBUG, "======= ==== ====\n");
483 /* fgJoystickRead( &joy_x, &joy_y, &joy_b1, &joy_b2 );
484 printf( "Joystick X %f Y %f B1 %d B2 %d\n",
485 joy_x, joy_y, joy_b1, joy_b2 );
487 fgAileronSet( joy_x ); */
489 // Get elapsed time for this past frame
490 elapsed = fgGetTimeInterval();
491 fgPrintf( FG_ALL, FG_BULK,
492 "Time interval is = %d, previous remainder is = %d\n",
495 // Calculate frame rate average
496 if ( elapsed > 0.0 ) {
498 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
499 accum += g->frames[i];
500 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
501 g->frames[i+1] = g->frames[i];
503 g->frames[0] = 1000.0 / (float)elapsed;
504 // printf("frame[0] = %.2f\n", g->frames[0]);
505 accum += g->frames[0];
506 g->frame_rate = accum / (float)FG_FRAME_RATE_HISTORY;
507 // printf("ave = %.2f\n", g->frame_rate);
510 // Calculate model iterations needed for next frame
511 fgPrintf( FG_ALL, FG_DEBUG,
512 "--> Frame rate is = %.2f\n", g->frame_rate);
513 elapsed += remainder;
515 multi_loop = (int)(((float)elapsed * 0.001) * DEFAULT_MODEL_HZ);
516 remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
517 fgPrintf( FG_ALL, FG_BULK,
518 "Model iterations needed = %d, new remainder = %d\n",
519 multi_loop, remainder);
522 if ( ! use_signals ) {
524 fgUpdateTimeDepCalcs(multi_loop);
527 // I'm just sticking this here for now, it should probably move
529 /* cur_elev = mesh_altitude(FG_Longitude * RAD_TO_ARCSEC,
530 FG_Latitude * RAD_TO_ARCSEC); */
531 // there is no ground collision detection really, so for now I
532 // just hard code the ground elevation to be 0 */
535 // printf("Ground elevation is %.2f meters here.\n", cur_elev);
536 // FG_Runway_altitude = cur_elev * METER_TO_FEET;
538 if ( FG_Altitude * FEET_TO_METER < cur_elev + 3.758099) {
539 // set this here, otherwise if we set runway height above our
540 // current height we get a really nasty bounce.
541 FG_Runway_altitude = FG_Altitude - 3.758099;
543 // now set aircraft altitude above ground
544 FG_Altitude = cur_elev * METER_TO_FEET + 3.758099;
545 fgPrintf( FG_ALL, FG_BULK, "<*> resetting altitude to %.0f meters\n",
546 FG_Altitude * FEET_TO_METER);
549 fgAircraftOutputCurrent(a);
551 // see if we need to load any new scenery tiles
554 // Process/manage pending events
555 global_events.Process();
557 // Run audio scheduler
558 #ifdef HAVE_AUDIO_SUPPORT
559 audio_sched.update();
565 fgPrintf( FG_ALL, FG_DEBUG, "\n");
569 // Handle new window size or exposure
570 static void fgReshape( int width, int height ) {
575 // Do this so we can call fgReshape(0,0) ourselves without having
576 // to know what the values of width & height are.
577 if ( (height > 0) && (width > 0) ) {
578 v->win_ratio = (GLfloat) width / (GLfloat) height;
582 v->winHeight = height;
584 // Inform gl of our view window size (now handled elsewhere)
585 // xglViewport(0, 0, (GLint)width, (GLint)height);
586 fgUpdateViewParams();
588 // xglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
592 // Initialize GLUT and define a main window
593 int fgGlutInit( int *argc, char **argv ) {
594 // GLUT will extract all glut specific options so later on we only
595 // need wory about our own.
596 xglutInit(argc, argv);
598 // Define Display Parameters
599 xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
601 // Define initial window size
602 xglutInitWindowSize(640, 480);
604 // Initialize windows
605 xglutCreateWindow("Flight Gear");
611 // Initialize GLUT event handlers
612 int fgGlutInitEvents( void ) {
613 // call fgReshape() on window resizes
614 xglutReshapeFunc( fgReshape );
616 // call GLUTkey() on keyboard event
617 xglutKeyboardFunc( GLUTkey );
618 glutSpecialFunc( GLUTspecialkey );
620 // call guiMouseFunc() whenever our little rodent is used
621 glutMouseFunc ( guiMouseFunc );
622 glutMotionFunc (guiMotionFunc );
623 glutPassiveMotionFunc (guiMotionFunc );
625 // call fgMainLoop() whenever there is
626 // nothing else to do
627 xglutIdleFunc( fgMainLoop );
630 xglutDisplayFunc( fgRenderFrame );
637 int main( int argc, char **argv ) {
641 char path[256], slfile[256];
642 int result; // Used in command line argument.
644 f = current_aircraft.flight;
645 o = ¤t_options;
648 _control87(MCW_EM, MCW_EM); /* defined in float.h */
651 // Initialize the debugging output system
654 fgPrintf(FG_GENERAL, FG_INFO, "Flight Gear: Version %s\n\n", VERSION);
656 // Initialize the Window/Graphics environment.
657 if( !fgGlutInit(&argc, argv) ) {
658 fgPrintf( FG_GENERAL, FG_EXIT, "GLUT initialization failed ...\n" );
661 // Attempt to locate and parse a config file
662 // First check fg_root
663 strcpy(config, o->fg_root);
664 strcat(config, "/system.fgfsrc");
665 result = o->parse_config_file(config);
667 // Next check home directory
668 if ( getenv("HOME") != NULL ) {
669 strcpy(config, getenv("HOME"));
670 strcat(config, "/.fgfsrc");
671 result = o->parse_config_file(config);
674 // Parse remaining command line options
675 // These will override anything specified in a config file
676 result = o->parse_command_line(argc, argv);
677 if ( result != FG_OPTIONS_OK ) {
678 // Something must have gone horribly wrong with the command
679 // line parsing or maybe the user just requested help ... :-)
681 fgPrintf( FG_GENERAL, FG_EXIT, "\nExiting ...\n");
684 // These are a few miscellaneous things that aren't really
685 // "subsystems" but still need to be initialized.
686 if( !fgInitGeneral()) {
687 fgPrintf( FG_GENERAL, FG_EXIT, "General initializations failed ...\n" );
690 // This is the top level init routine which calls all the other
691 // subsystem initialization routines. If you are adding a
692 // subsystem to flight gear, its initialization call should
693 // located in this routine.
694 if( !fgInitSubsystems()) {
695 fgPrintf( FG_GENERAL, FG_EXIT,
696 "Subsystem initializations failed ...\n" );
699 // setup OpenGL view parameters
703 // init timer routines, signals, etc. Arrange for an alarm
704 // signal to be generated, etc.
705 fgInitTimeDepCalcs();
708 // Initialize the various GLUT Event Handlers.
709 if( !fgGlutInitEvents() ) {
710 fgPrintf( FG_GENERAL, FG_EXIT,
711 "GLUT event handler initialization failed ...\n" );
714 //Init the user interface
717 // Initialize audio support
718 #ifdef HAVE_AUDIO_SUPPORT
719 audio_mixer . setMasterVolume ( 30 ) ; /* 50% of max volume. */
720 audio_sched . setSafetyMargin ( 1.0 ) ;
721 strcpy(path, o->fg_root);
722 strcat(path, "/Sounds/");
724 strcpy(slfile, path);
725 strcat(slfile, "prpidle.wav");
726 // s1 = new slSample ( slfile );
727 s1 = new slSample ( "/dos/X-System-HSR/sounds/xp_recip.wav", &audio_sched );
728 printf("Rate = %d Bps = %d Stereo = %d\n",
729 s1 -> getRate(), s1 -> getBps(), s1 -> getStereo());
730 audio_sched . loopSample ( s1 );
732 // strcpy(slfile, path);
733 // strcat(slfile, "thunder.wav");
734 // s2 -> loadFile ( slfile );
735 // s2 -> adjustVolume(0.5);
736 // audio_sched -> playSample ( s2 );
739 // pass control off to the master GLUT event handler
742 // we never actually get here ... but just in case ... :-)
748 // Revision 1.28 1998/06/27 16:54:32 curt
749 // Replaced "extern displayInstruments" with a entry in fgOPTIONS.
750 // Don't change the view port when displaying the panel.
752 // Revision 1.27 1998/06/17 21:35:10 curt
753 // Refined conditional audio support compilation.
754 // Moved texture parameter setup calls to ../Scenery/materials.cxx
755 // #include <string.h> before various STL includes.
756 // Make HUD default state be enabled.
758 // Revision 1.26 1998/06/13 00:40:32 curt
759 // Tweaked fog command line options.
761 // Revision 1.25 1998/06/12 14:27:26 curt
762 // Pui -> PUI, Gui -> GUI.
764 // Revision 1.24 1998/06/12 00:57:39 curt
765 // Added support for Pui/Gui.
766 // Converted fog to GL_FOG_EXP2.
767 // Link to static simulator parts.
768 // Update runfg.bat to try to be a little smarter.
770 // Revision 1.23 1998/06/08 17:57:04 curt
771 // Minor sound/startup position tweaks.
773 // Revision 1.22 1998/06/05 18:18:40 curt
774 // A bit of fiddling with audio ...
776 // Revision 1.21 1998/06/03 22:01:06 curt
777 // Tweaking sound library usage.
779 // Revision 1.20 1998/06/03 00:47:11 curt
780 // Updated to compile in audio support if OSS available.
781 // Updated for new version of Steve's audio library.
782 // STL includes don't use .h
783 // Small view optimizations.
785 // Revision 1.19 1998/06/01 17:54:40 curt
786 // Added Linux audio support.
787 // avoid glClear( COLOR_BUFFER_BIT ) when not using it to set the sky color.
790 // Revision 1.18 1998/05/29 20:37:19 curt
791 // Tweaked material properties & lighting a bit in GLUTmain.cxx.
792 // Read airport list into a "map" STL for dynamic list sizing and fast tree
795 // Revision 1.17 1998/05/22 21:28:52 curt
796 // Modifications to use the new fgEVENT_MGR class.
798 // Revision 1.16 1998/05/20 20:51:33 curt
799 // Tweaked smooth shaded texture lighting properties.
800 // Converted fgLIGHT to a C++ class.
802 // Revision 1.15 1998/05/16 13:08:34 curt
803 // C++ - ified views.[ch]xx
804 // Shuffled some additional view parameters into the fgVIEW class.
805 // Changed tile-radius to tile-diameter because it is a much better
807 // Added a WORLD_TO_EYE transformation to views.cxx. This allows us
808 // to transform world space to eye space for view frustum culling.
810 // Revision 1.14 1998/05/13 18:29:57 curt
811 // Added a keyboard binding to dynamically adjust field of view.
812 // Added a command line option to specify fov.
813 // Adjusted terrain color.
814 // Root path info moved to fgOPTIONS.
815 // Added ability to parse options out of a config file.
817 // Revision 1.13 1998/05/11 18:18:15 curt
818 // For flat shading use "glHint (GL_FOG_HINT, GL_FASTEST )"
820 // Revision 1.12 1998/05/07 23:14:15 curt
821 // Added "D" key binding to set autopilot heading.
822 // Made frame rate calculation average out over last 10 frames.
823 // Borland C++ floating point exception workaround.
824 // Added a --tile-radius=n option.
826 // Revision 1.11 1998/05/06 03:16:23 curt
827 // Added an averaged global frame rate counter.
828 // Added an option to control tile radius.
830 // Revision 1.10 1998/05/03 00:47:31 curt
831 // Added an option to enable/disable full-screen mode.
833 // Revision 1.9 1998/04/30 12:34:17 curt
834 // Added command line rendering options:
835 // enable/disable fog/haze
836 // specify smooth/flat shading
837 // disable sky blending and just use a solid color
838 // enable wireframe drawing mode
840 // Revision 1.8 1998/04/28 01:20:21 curt
841 // Type-ified fgTIME and fgVIEW.
842 // Added a command line option to disable textures.
844 // Revision 1.7 1998/04/26 05:10:02 curt
845 // "struct fgLIGHT" -> "fgLIGHT" because fgLIGHT is typedef'd.
847 // Revision 1.6 1998/04/25 22:06:30 curt
848 // Edited cvs log messages in source files ... bad bad bad!
850 // Revision 1.5 1998/04/25 20:24:01 curt
851 // Cleaned up initialization sequence to eliminate interdependencies
852 // between sun position, lighting, and view position. This creates a
853 // valid single pass initialization path.
855 // Revision 1.4 1998/04/24 14:19:30 curt
858 // Revision 1.3 1998/04/24 00:49:18 curt
859 // Wrapped "#include <config.h>" in "#ifdef HAVE_CONFIG_H"
860 // Trying out some different option parsing code.
861 // Some code reorganization.
863 // Revision 1.2 1998/04/22 13:25:41 curt
864 // C++ - ifing the code.
865 // Starting a bit of reorganization of lighting code.
867 // Revision 1.1 1998/04/21 17:02:39 curt
868 // Prepairing for C++ integration.
870 // Revision 1.71 1998/04/18 04:11:26 curt
871 // Moved fg_debug to it's own library, added zlib support.
873 // Revision 1.70 1998/04/14 02:21:02 curt
874 // Incorporated autopilot heading hold contributed by: Jeff Goeke-Smith
875 // <jgoeke@voyager.net>
877 // Revision 1.69 1998/04/08 23:35:34 curt
878 // Tweaks to Gnu automake/autoconf system.
880 // Revision 1.68 1998/04/03 22:09:03 curt
881 // Converting to Gnu autoconf system.
883 // Revision 1.67 1998/03/23 21:24:37 curt
884 // Source code formating tweaks.
886 // Revision 1.66 1998/03/14 00:31:20 curt
887 // Beginning initial terrain texturing experiments.
889 // Revision 1.65 1998/03/09 22:45:57 curt
890 // Minor tweaks for building on sparc platform.
892 // Revision 1.64 1998/02/20 00:16:23 curt
893 // Thursday's tweaks.
895 // Revision 1.63 1998/02/16 16:17:39 curt
898 // Revision 1.62 1998/02/16 13:39:42 curt
899 // Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
900 // tiles to occasionally be missing.
902 // Revision 1.61 1998/02/12 21:59:46 curt
903 // Incorporated code changes contributed by Charlie Hotchkiss
904 // <chotchkiss@namg.us.anritsu.com>
906 // Revision 1.60 1998/02/11 02:50:40 curt
909 // Revision 1.59 1998/02/09 22:56:54 curt
910 // Removed "depend" files from cvs control. Other minor make tweaks.
912 // Revision 1.58 1998/02/09 15:07:49 curt
915 // Revision 1.57 1998/02/07 15:29:40 curt
916 // Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
917 // <chotchkiss@namg.us.anritsu.com>
919 // Revision 1.56 1998/02/03 23:20:23 curt
920 // Lots of little tweaks to fix various consistency problems discovered by
921 // Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
922 // passed arguments along to the real printf(). Also incorporated HUD changes
923 // by Michele America.
925 // Revision 1.55 1998/02/02 20:53:58 curt
926 // Incorporated Durk's changes.
928 // Revision 1.54 1998/01/31 00:43:10 curt
929 // Added MetroWorks patches from Carmen Volpe.
931 // Revision 1.53 1998/01/27 18:35:54 curt
934 // Revision 1.52 1998/01/27 00:47:56 curt
935 // Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
936 // system and commandline/config file processing code.
938 // Revision 1.51 1998/01/26 15:57:05 curt
939 // Tweaks for dynamic scenery development.
941 // Revision 1.50 1998/01/19 19:27:07 curt
942 // Merged in make system changes from Bob Kuehne <rpk@sgi.com>
943 // This should simplify things tremendously.
945 // Revision 1.49 1998/01/19 18:40:31 curt
946 // Tons of little changes to clean up the code and to remove fatal errors
947 // when building with the c++ compiler.
949 // Revision 1.48 1998/01/19 18:35:46 curt
950 // Minor tweaks and fixes for cygwin32.
952 // Revision 1.47 1998/01/13 00:23:08 curt
953 // Initial changes to support loading and management of scenery tiles. Note,
954 // there's still a fair amount of work left to be done.
956 // Revision 1.46 1998/01/08 02:22:06 curt
957 // Beginning to integrate Tile management subsystem.
959 // Revision 1.45 1998/01/07 03:18:55 curt
960 // Moved astronomical stuff from .../Src/Scenery to .../Src/Astro/
962 // Revision 1.44 1997/12/30 22:22:31 curt
963 // Further integration of event manager.
965 // Revision 1.43 1997/12/30 20:47:43 curt
966 // Integrated new event manager with subsystem initializations.
968 // Revision 1.42 1997/12/30 16:36:47 curt
969 // Merged in Durk's changes ...
971 // Revision 1.41 1997/12/30 13:06:56 curt
972 // A couple lighting tweaks ...
974 // Revision 1.40 1997/12/30 01:38:37 curt
975 // Switched back to per vertex normals and smooth shading for terrain.
977 // Revision 1.39 1997/12/22 23:45:45 curt
978 // First stab at sunset/sunrise sky glow effects.
980 // Revision 1.38 1997/12/22 04:14:28 curt
981 // Aligned sky with sun so dusk/dawn effects can be correct relative to the sun.
983 // Revision 1.37 1997/12/19 23:34:03 curt
984 // Lot's of tweaking with sky rendering and lighting.
986 // Revision 1.36 1997/12/19 16:44:57 curt
987 // Working on scene rendering order and options.
989 // Revision 1.35 1997/12/18 23:32:32 curt
990 // First stab at sky dome actually starting to look reasonable. :-)
992 // Revision 1.34 1997/12/17 23:13:34 curt
993 // Began working on rendering a sky.
995 // Revision 1.33 1997/12/15 23:54:45 curt
996 // Add xgl wrappers for debugging.
997 // Generate terrain normals on the fly.
999 // Revision 1.32 1997/12/15 20:59:08 curt
1002 // Revision 1.31 1997/12/12 21:41:25 curt
1003 // More light/material property tweaking ... still a ways off.
1005 // Revision 1.30 1997/12/12 19:52:47 curt
1006 // Working on lightling and material properties.
1008 // Revision 1.29 1997/12/11 04:43:54 curt
1009 // Fixed sun vector and lighting problems. I thing the moon is now lit
1012 // Revision 1.28 1997/12/10 22:37:45 curt
1013 // Prepended "fg" on the name of all global structures that didn't have it yet.
1014 // i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
1016 // Revision 1.27 1997/12/09 05:11:54 curt
1017 // Working on tweaking lighting.
1019 // Revision 1.26 1997/12/09 04:25:29 curt
1020 // Working on adding a global lighting params structure.
1022 // Revision 1.25 1997/12/08 22:54:09 curt
1023 // Enabled GL_CULL_FACE.
1025 // Revision 1.24 1997/11/25 19:25:32 curt
1026 // Changes to integrate Durk's moon/sun code updates + clean up.
1028 // Revision 1.23 1997/11/15 18:16:34 curt
1031 // Revision 1.22 1997/10/30 12:38:41 curt
1032 // Working on new scenery subsystem.
1034 // Revision 1.21 1997/09/23 00:29:38 curt
1035 // Tweaks to get things to compile with gcc-win32.
1037 // Revision 1.20 1997/09/22 14:44:19 curt
1038 // Continuing to try to align stars correctly.
1040 // Revision 1.19 1997/09/18 16:20:08 curt
1041 // At dusk/dawn add/remove stars in stages.
1043 // Revision 1.18 1997/09/16 22:14:51 curt
1044 // Tweaked time of day lighting equations. Don't draw stars during the day.
1046 // Revision 1.17 1997/09/16 15:50:29 curt
1047 // Working on star alignment and time issues.
1049 // Revision 1.16 1997/09/13 02:00:06 curt
1050 // Mostly working on stars and generating sidereal time for accurate star
1053 // Revision 1.15 1997/09/05 14:17:27 curt
1054 // More tweaking with stars.
1056 // Revision 1.14 1997/09/05 01:35:53 curt
1057 // Working on getting stars right.
1059 // Revision 1.13 1997/09/04 02:17:34 curt
1062 // Revision 1.12 1997/08/27 21:32:24 curt
1063 // Restructured view calculation code. Added stars.
1065 // Revision 1.11 1997/08/27 03:30:16 curt
1066 // Changed naming scheme of basic shared structures.
1068 // Revision 1.10 1997/08/25 20:27:22 curt
1069 // Merged in initial HUD and Joystick code.
1071 // Revision 1.9 1997/08/22 21:34:39 curt
1072 // Doing a bit of reorganizing and house cleaning.
1074 // Revision 1.8 1997/08/19 23:55:03 curt
1075 // Worked on better simulating real lighting.
1077 // Revision 1.7 1997/08/16 12:22:38 curt
1078 // Working on improving the lighting/shading.
1080 // Revision 1.6 1997/08/13 20:24:56 curt
1081 // Changes due to changing sunpos interface.
1083 // Revision 1.5 1997/08/06 21:08:32 curt
1084 // Sun position now really* works (I think) ... I still have sun time warping
1085 // code in place, probably should remove it soon.
1087 // Revision 1.4 1997/08/06 15:41:26 curt
1088 // Working on correct sun position.
1090 // Revision 1.3 1997/08/06 00:24:22 curt
1091 // Working on correct real time sun lighting.
1093 // Revision 1.2 1997/08/04 20:25:15 curt
1094 // Organizational tweaking.
1096 // Revision 1.1 1997/08/02 18:45:00 curt
1097 // Renamed GLmain.c GLUTmain.c
1099 // Revision 1.43 1997/08/02 16:23:47 curt
1102 // Revision 1.42 1997/08/01 19:43:33 curt
1103 // Making progress with coordinate system overhaul.
1105 // Revision 1.41 1997/07/31 22:52:37 curt
1106 // Working on redoing internal coordinate systems & scenery transformations.
1108 // Revision 1.40 1997/07/30 16:12:42 curt
1109 // Moved fg_random routines from Util/ to Math/
1111 // Revision 1.39 1997/07/21 14:45:01 curt
1114 // Revision 1.38 1997/07/19 23:04:47 curt
1115 // Added an initial weather section.
1117 // Revision 1.37 1997/07/19 22:34:02 curt
1118 // Moved PI definitions to ../constants.h
1119 // Moved random() stuff to ../Utils/ and renamed fg_random()
1121 // Revision 1.36 1997/07/18 23:41:25 curt
1122 // Tweaks for building with Cygnus Win32 compiler.
1124 // Revision 1.35 1997/07/18 14:28:34 curt
1125 // Hacked in some support for wind/turbulence.
1127 // Revision 1.34 1997/07/16 20:04:48 curt
1128 // Minor tweaks to aid Win32 port.
1130 // Revision 1.33 1997/07/12 03:50:20 curt
1131 // Added an #include <Windows32/Base.h> to help compiling for Win32
1133 // Revision 1.32 1997/07/11 03:23:18 curt
1134 // Solved some scenery display/orientation problems. Still have a positioning
1135 // (or transformation?) problem.
1137 // Revision 1.31 1997/07/11 01:29:58 curt
1138 // More tweaking of terrian floor.
1140 // Revision 1.30 1997/07/10 04:26:37 curt
1141 // We now can interpolated ground elevation for any position in the grid. We
1142 // can use this to enforce a "hard" ground. We still need to enforce some
1143 // bounds checking so that we don't try to lookup data points outside the
1146 // Revision 1.29 1997/07/09 21:31:12 curt
1147 // Working on making the ground "hard."
1149 // Revision 1.28 1997/07/08 18:20:12 curt
1150 // Working on establishing a hard ground.
1152 // Revision 1.27 1997/07/07 20:59:49 curt
1153 // Working on scenery transformations to enable us to fly fluidly over the
1154 // poles with no discontinuity/distortion in scenery.
1156 // Revision 1.26 1997/07/05 20:43:34 curt
1157 // renamed mat3 directory to Math so we could add other math related routines.
1159 // Revision 1.25 1997/06/29 21:19:17 curt
1160 // Working on scenery management system.
1162 // Revision 1.24 1997/06/26 22:14:53 curt
1163 // Beginning work on a scenery management system.
1165 // Revision 1.23 1997/06/26 19:08:33 curt
1166 // Restructuring make, adding automatic "make dep" support.
1168 // Revision 1.22 1997/06/25 15:39:47 curt
1169 // Minor changes to compile with rsxnt/win32.
1171 // Revision 1.21 1997/06/22 21:44:41 curt
1172 // Working on intergrating the VRML (subset) parser.
1174 // Revision 1.20 1997/06/21 17:12:53 curt
1175 // Capitalized subdirectory names.
1177 // Revision 1.19 1997/06/18 04:10:31 curt
1178 // A couple more runway tweaks ...
1180 // Revision 1.18 1997/06/18 02:21:24 curt
1181 // Hacked in a runway
1183 // Revision 1.17 1997/06/17 16:51:58 curt
1184 // Timer interval stuff now uses gettimeofday() instead of ftime()
1186 // Revision 1.16 1997/06/17 04:19:16 curt
1187 // More timer related tweaks with respect to view direction changes.
1189 // Revision 1.15 1997/06/17 03:41:10 curt
1190 // Nonsignal based interval timing is now working.
1191 // This would be a good time to look at cleaning up the code structure a bit.
1193 // Revision 1.14 1997/06/16 19:32:51 curt
1194 // Starting to add general timer support.
1196 // Revision 1.13 1997/06/02 03:40:06 curt
1197 // A tiny bit more view tweaking.
1199 // Revision 1.12 1997/06/02 03:01:38 curt
1200 // Working on views (side, front, back, transitions, etc.)
1202 // Revision 1.11 1997/05/31 19:16:25 curt
1203 // Elevator trim added.
1205 // Revision 1.10 1997/05/31 04:13:52 curt
1206 // WE CAN NOW FLY!!!
1208 // Continuing work on the LaRCsim flight model integration.
1209 // Added some MSFS-like keyboard input handling.
1211 // Revision 1.9 1997/05/30 19:27:01 curt
1212 // The LaRCsim flight model is starting to look like it is working.
1214 // Revision 1.8 1997/05/30 03:54:10 curt
1215 // Made a bit more progress towards integrating the LaRCsim flight model.
1217 // Revision 1.7 1997/05/29 22:39:49 curt
1218 // Working on incorporating the LaRCsim flight model.
1220 // Revision 1.6 1997/05/29 12:31:39 curt
1221 // Minor tweaks, moving towards general flight model integration.
1223 // Revision 1.5 1997/05/29 02:33:23 curt
1224 // Updated to reflect changing interfaces in other "modules."
1226 // Revision 1.4 1997/05/27 17:44:31 curt
1227 // Renamed & rearranged variables and routines. Added some initial simple
1228 // timer/alarm routines so the flight model can be updated on a regular
1231 // Revision 1.3 1997/05/23 15:40:25 curt
1232 // Added GNU copyright headers.
1235 // Revision 1.2 1997/05/23 00:35:12 curt
1236 // Trying to get fog to work ...
1238 // Revision 1.1 1997/05/21 15:57:51 curt
1239 // Renamed due to added GLUT support.
1241 // Revision 1.3 1997/05/19 18:22:42 curt
1242 // Parameter tweaking ... starting to stub in fog support.
1244 // Revision 1.2 1997/05/17 00:17:34 curt
1245 // Trying to stub in support for standard OpenGL.
1247 // Revision 1.1 1997/05/16 16:05:52 curt
1248 // Initial revision.