1 // main.cxx -- top level sim routines
3 // Written by Curtis Olson, started May 1997.
5 // Copyright (C) 1997 - 2002 Curtis L. Olson - curt@flightgear.org
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 #if defined(__linux__) && defined(__i386__)
29 # include <fpu_control.h>
33 #include <simgear/compiler.h>
36 #ifndef SG_HAVE_NATIVE_SGI_COMPILERS
41 #include <simgear/misc/exception.hxx>
42 #include <simgear/ephemeris/ephemeris.hxx>
43 #include <simgear/route/route.hxx>
45 #ifdef SG_MATH_EXCEPTION_CLASH
58 #include <string.h> // for strcmp()
65 #ifdef HAVE_SYS_STAT_H
66 # include <sys/stat.h> // for stat()
70 # include <unistd.h> // for stat()
73 #include <plib/netChat.h>
77 #include <simgear/constants.h> // for VERSION
78 #include <simgear/debug/logstream.hxx>
79 #include <simgear/math/polar3d.hxx>
80 #include <simgear/math/sg_random.h>
81 #include <simgear/misc/sg_path.hxx>
82 #include <simgear/sky/sky.hxx>
83 #include <simgear/timing/sg_time.hxx>
85 #include <Include/general.hxx>
87 #include <Aircraft/aircraft.hxx>
89 #include <ATC/ATCmgr.hxx>
90 #include <ATC/ATCdisplay.hxx>
91 #include <ATC/AIMgr.hxx>
93 #include <Autopilot/newauto.hxx>
95 #include <Cockpit/cockpit.hxx>
96 #include <Cockpit/radiostack.hxx>
97 #include <Cockpit/steam.hxx>
99 #include <FDM/UIUCModel/uiuc_aircraftdir.h>
101 #include <Model/acmodel.hxx>
102 #include <Model/modelmgr.hxx>
103 #ifdef FG_NETWORK_OLK
104 #include <NetworkOLK/network.h>
106 #include <Objects/matlib.hxx>
107 #include <Scenery/scenery.hxx>
108 #include <Scenery/tilemgr.hxx>
109 #ifdef ENABLE_AUDIO_SUPPORT
110 # include <Sound/soundmgr.hxx>
111 # include <Sound/fg_fx.hxx>
112 # include <Sound/morse.hxx>
114 #include <Time/FGEventMgr.hxx>
115 #include <Time/fg_timer.hxx>
116 #include <Time/light.hxx>
117 #include <Time/sunpos.hxx>
118 #include <Time/tmp.hxx>
120 #include <Input/input.hxx>
123 #include <simgear/misc/sgstream.hxx>
124 #include <simgear/math/point3d.hxx>
125 #include <FDM/flight.hxx>
126 #include <FDM/ADA.hxx>
127 #include <Scenery/tileentry.hxx>
130 // PFNGLPOINTPARAMETERFEXTPROC glPointParameterfEXT = 0;
131 // PFNGLPOINTPARAMETERFVEXTPROC glPointParameterfvEXT = 0;
133 float default_attenuation[3] = {1.0, 0.0, 0.0};
134 //Required for using GL_extensions
135 void fgLoadDCS (void);
136 void fgUpdateDCS (void);
137 ssgSelector *ship_sel=NULL;
138 // upto 32 instances of a same object can be loaded.
139 ssgTransform *ship_pos[32];
140 double obj_lat[32],obj_lon[32],obj_alt[32],obj_pitch[32],obj_roll[32];
142 ssgSelector *lightpoints_brightness = new ssgSelector;
143 ssgTransform *lightpoints_transform = new ssgTransform;
144 FGTileEntry *dummy_tile;
147 // Clip plane settings...
148 float scene_nearplane = 0.5f;
149 float scene_farplane = 120000.0f;
151 static double delta_time_sec = 0;
154 #ifndef FG_NEW_ENVIRONMENT
155 # include <WeatherCM/FGLocalWeatherDatabase.h>
157 # include <Environment/environment_mgr.hxx>
162 #include "fg_init.hxx"
164 #include "fg_props.hxx"
165 #include "globals.hxx"
166 #include "splash.hxx"
167 #include "viewmgr.hxx"
168 #include "options.hxx"
169 #include "logger.hxx"
172 # include <console.h> // -dw- for command line dialog
176 FGEventMgr global_events;
178 // This is a record containing a bit of global housekeeping information
181 // Specify our current idle function state. This is used to run all
182 // our initializations out of the glutIdleLoop() so that we can get a
183 // splash screen up and running right away.
184 static int idle_state = 0;
185 static long global_multi_loop;
187 // forward declaration
188 void fgReshape( int width, int height );
190 // fog constants. I'm a little nervous about putting actual code out
191 // here but it seems to work (?)
192 static const double m_log01 = -log( 0.01 );
193 static const double sqrt_m_log01 = sqrt( m_log01 );
194 static GLfloat fog_exp_density;
195 static GLfloat fog_exp2_density;
196 static GLfloat fog_exp2_punch_through;
198 ssgRoot *lighting = NULL;
199 // ssgBranch *airport = NULL;
201 #ifdef FG_NETWORK_OLK
202 ssgSelector *fgd_sel = NULL;
203 ssgTransform *fgd_pos = NULL;
206 // current fdm/position used for view
207 FGInterface cur_view_fdm;
213 sgMat4 copy_of_ssgOpenGLAxisSwapMatrix =
215 { 1.0f, 0.0f, 0.0f, 0.0f },
216 { 0.0f, 0.0f, -1.0f, 0.0f },
217 { 0.0f, 1.0f, 0.0f, 0.0f },
218 { 0.0f, 0.0f, 0.0f, 1.0f }
221 // The following defines flightgear options. Because glutlib will also
222 // want to parse its own options, those options must not be included here
223 // or they will get parsed by the main program option parser. Hence case
224 // is significant for any option added that might be in conflict with
227 // glutlib parses for:
229 // -direct (invalid in Win32)
233 // -indirect (invalid in Win32)
236 // Note that glutlib depends upon strings while this program's
237 // option parser wants only initial characters followed by numbers
242 ssgSimpleState *default_state;
243 ssgSimpleState *hud_and_panel;
244 ssgSimpleState *menus;
246 SGTimeStamp last_time_stamp;
247 SGTimeStamp current_time_stamp;
249 void fgBuildRenderStates( void ) {
250 default_state = new ssgSimpleState;
251 default_state->ref();
252 default_state->disable( GL_TEXTURE_2D );
253 default_state->enable( GL_CULL_FACE );
254 default_state->enable( GL_COLOR_MATERIAL );
255 default_state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
256 default_state->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
257 default_state->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
258 default_state->disable( GL_BLEND );
259 default_state->disable( GL_ALPHA_TEST );
260 default_state->disable( GL_LIGHTING );
262 hud_and_panel = new ssgSimpleState;
263 hud_and_panel->ref();
264 hud_and_panel->disable( GL_CULL_FACE );
265 hud_and_panel->disable( GL_TEXTURE_2D );
266 hud_and_panel->disable( GL_LIGHTING );
267 hud_and_panel->enable( GL_BLEND );
269 menus = new ssgSimpleState;
271 menus->disable( GL_CULL_FACE );
272 menus->disable( GL_TEXTURE_2D );
273 menus->enable( GL_BLEND );
277 // fgInitVisuals() -- Initialize various GL/view parameters
278 void fgInitVisuals( void ) {
281 l = &cur_light_params;
283 #ifndef GLUT_WRONG_VERSION
284 // Go full screen if requested ...
285 if ( fgGetBool("/sim/startup/fullscreen") ) {
290 // If enabled, normal vectors specified with glNormal are scaled
291 // to unit length after transformation. Enabling this has
292 // performance implications. See the docs for glNormal.
293 // glEnable( GL_NORMALIZE );
295 glEnable( GL_LIGHTING );
296 glEnable( GL_LIGHT0 );
297 glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
300 sgSetVec3( sunpos, l->sun_vec[0], l->sun_vec[1], l->sun_vec[2] );
301 ssgGetLight( 0 ) -> setPosition( sunpos );
303 glFogi (GL_FOG_MODE, GL_EXP2);
304 if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
305 (!fgGetBool("/sim/rendering/shading"))) {
306 // if fastest fog requested, or if flat shading force fastest
307 glHint ( GL_FOG_HINT, GL_FASTEST );
308 } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
309 glHint ( GL_FOG_HINT, GL_NICEST );
311 if ( fgGetBool("/sim/rendering/wireframe") ) {
313 glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
316 // This is the default anyways, but it can't hurt
317 glFrontFace ( GL_CCW );
320 // glEnable(GL_POINT_SMOOTH);
321 // glEnable(GL_LINE_SMOOTH);
322 // glEnable(GL_POLYGON_SMOOTH);
326 // For HiRes screen Dumps using Brian Pauls TR Library
327 void trRenderFrame( void ) {
329 if ( fgPanelVisible() ) {
330 GLfloat height = fgGetInt("/sim/startup/ysize");
332 (current_panel->getViewHeight() - current_panel->getYOffset())
333 * (height / 768.0) + 1;
334 glTranslatef( 0.0, view_h, 0.0 );
337 static GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
338 static GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
340 fgLIGHT *l = &cur_light_params;
342 glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
343 l->adj_fog_color[2], l->adj_fog_color[3]);
345 glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
347 // set the opengl state to known default values
348 default_state->force();
351 glFogf ( GL_FOG_DENSITY, fog_exp2_density);
352 glFogi ( GL_FOG_MODE, GL_EXP2 );
353 glFogfv ( GL_FOG_COLOR, l->adj_fog_color );
355 // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
356 // we only update GL_AMBIENT for our lights we will never get
357 // a completely dark scene. So, we set GL_LIGHT_MODEL_AMBIENT
358 // explicitely to black.
359 glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
361 ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
363 // texture parameters
364 glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
365 glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
367 // we need a white diffuse light for the phase of the moon
368 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
371 // draw the ssg scene
372 // return to the desired diffuse color
373 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
374 glEnable( GL_DEPTH_TEST );
375 ssgSetNearFar( scene_nearplane, scene_farplane );
376 ssgCullAndDraw( globals->get_scene_graph() );
379 glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
380 ssgSetNearFar( scene_nearplane, scene_farplane );
381 ssgCullAndDraw( lighting );
383 thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
385 globals->get_model_mgr()->draw();
386 globals->get_aircraft_model()->draw();
388 // need to do this here as hud_and_panel state is static to
389 // main.cxx and HUD and Panel routines have to be called with
390 // knowledge of the the TR struct < see gui.cxx::HighResDump()
391 hud_and_panel->apply();
395 // Update all Visuals (redraws anything graphics related)
396 void fgRenderFrame() {
398 // Process/manage pending events
399 global_events.update( delta_time_sec );
401 static const SGPropertyNode *longitude
402 = fgGetNode("/position/longitude-deg");
403 static const SGPropertyNode *latitude
404 = fgGetNode("/position/latitude-deg");
405 static const SGPropertyNode *altitude
406 = fgGetNode("/position/altitude-ft");
407 static const SGPropertyNode *groundlevel_nearplane
408 = fgGetNode("/sim/current-view/ground-level-nearplane-m");
410 // Update the default (kludged) properties.
413 FGViewer *current__view = globals->get_current_view();
415 fgLIGHT *l = &cur_light_params;
416 static double last_visibility = -9999;
419 double actual_visibility = thesky->get_visibility();
420 if ( actual_visibility != last_visibility ) {
421 last_visibility = actual_visibility;
423 fog_exp_density = m_log01 / actual_visibility;
424 fog_exp2_density = sqrt_m_log01 / actual_visibility;
425 fog_exp2_punch_through = sqrt_m_log01 / ( actual_visibility * 2.5 );
429 // GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
430 // GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
431 // GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
432 // GLfloat mat_shininess[] = { 10.0 };
433 GLbitfield clear_mask;
435 if ( idle_state != 1000 ) {
436 // still initializing, draw the splash screen
437 if ( fgGetBool("/sim/startup/splash-screen") ) {
440 // Keep resetting sim time while the sim is initializing
441 globals->set_sim_time_sec( 0.0 );
443 // idle_state is now 1000 meaning we've finished all our
444 // initializations and are running the main loop, so this will
445 // now work without seg faulting the system.
447 // calculate our current position in cartesian space
448 scenery.set_center( scenery.get_next_center() );
451 fgReshape( fgGetInt("/sim/startup/xsize"),
452 fgGetInt("/sim/startup/ysize") );
454 // set the sun position
455 glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
457 clear_mask = GL_DEPTH_BUFFER_BIT;
458 if ( fgGetBool("/sim/rendering/wireframe") ) {
459 clear_mask |= GL_COLOR_BUFFER_BIT;
462 if ( fgGetBool("/sim/rendering/skyblend") ) {
463 if ( fgGetBool("/sim/rendering/textures") ) {
464 // glClearColor(black[0], black[1], black[2], black[3]);
465 glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
466 l->adj_fog_color[2], l->adj_fog_color[3]);
467 clear_mask |= GL_COLOR_BUFFER_BIT;
470 glClearColor(l->sky_color[0], l->sky_color[1],
471 l->sky_color[2], l->sky_color[3]);
472 clear_mask |= GL_COLOR_BUFFER_BIT;
474 glClear( clear_mask );
476 // Tell GL we are switching to model view parameters
478 // I really should create a derived ssg node or use a call
479 // back or something so that I can draw the sky within the
480 // ssgCullAndDraw() function, but for now I just mimic what
481 // ssg does to set up the model view matrix
482 glMatrixMode(GL_MODELVIEW);
484 ssgSetCamera( (sgVec4 *)current__view->get_VIEW() );
486 // set the opengl state to known default values
487 default_state->force();
489 // update fog params if visibility has changed
490 double visibility_meters = fgGetDouble("/environment/visibility-m");
491 thesky->set_visibility(visibility_meters);
493 thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
494 ( global_multi_loop * fgGetInt("/sim/speed-up") )
495 / (double)fgGetInt("/sim/model-hz") );
497 // Set correct opengl fog density
498 glFogf (GL_FOG_DENSITY, fog_exp2_density);
500 // update the sky dome
501 if ( fgGetBool("/sim/rendering/skyblend") ) {
502 /* cout << "thesky->repaint() sky_color = "
503 << cur_light_params.sky_color[0] << " "
504 << cur_light_params.sky_color[1] << " "
505 << cur_light_params.sky_color[2] << " "
506 << cur_light_params.sky_color[3] << endl;
508 << cur_light_params.fog_color[0] << " "
509 << cur_light_params.fog_color[1] << " "
510 << cur_light_params.fog_color[2] << " "
511 << cur_light_params.fog_color[3] << endl;
512 cout << " sun_angle = " << cur_light_params.sun_angle
513 << " moon_angle = " << cur_light_params.moon_angle
515 thesky->repaint( cur_light_params.sky_color,
516 cur_light_params.adj_fog_color,
517 cur_light_params.sun_angle,
518 cur_light_params.moon_angle,
519 globals->get_ephem()->getNumPlanets(),
520 globals->get_ephem()->getPlanets(),
521 globals->get_ephem()->getNumStars(),
522 globals->get_ephem()->getStars() );
524 /* cout << "thesky->reposition( view_pos = " << view_pos[0] << " "
525 << view_pos[1] << " " << view_pos[2] << endl;
526 cout << " zero_elev = " << zero_elev[0] << " "
527 << zero_elev[1] << " " << zero_elev[2]
528 << " lon = " << cur_fdm_state->get_Longitude()
529 << " lat = " << cur_fdm_state->get_Latitude() << endl;
530 cout << " sun_rot = " << cur_light_params.sun_rotation
531 << " gst = " << SGTime::cur_time_params->getGst() << endl;
532 cout << " sun ra = " << globals->get_ephem()->getSunRightAscension()
533 << " sun dec = " << globals->get_ephem()->getSunDeclination()
534 << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
535 << " moon dec = " << globals->get_ephem()->getMoonDeclination() << endl; */
537 thesky->reposition( current__view->get_view_pos(),
538 current__view->get_zero_elev(),
539 current__view->get_world_up(),
540 longitude->getDoubleValue()
541 * SGD_DEGREES_TO_RADIANS,
542 latitude->getDoubleValue()
543 * SGD_DEGREES_TO_RADIANS,
544 altitude->getDoubleValue() * SG_FEET_TO_METER,
545 cur_light_params.sun_rotation,
546 globals->get_time_params()->getGst(),
547 globals->get_ephem()->getSunRightAscension(),
548 globals->get_ephem()->getSunDeclination(),
550 globals->get_ephem()->getMoonRightAscension(),
551 globals->get_ephem()->getMoonDeclination(),
555 glEnable( GL_DEPTH_TEST );
556 if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
558 glFogi( GL_FOG_MODE, GL_EXP2 );
559 glFogfv( GL_FOG_COLOR, l->adj_fog_color );
562 // set sun/lighting parameters
563 ssgGetLight( 0 ) -> setPosition( l->sun_vec );
565 // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
566 // we only update GL_AMBIENT for our lights we will never get
567 // a completely dark scene. So, we set GL_LIGHT_MODEL_AMBIENT
568 // explicitely to black.
569 GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
570 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
571 glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
573 ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
574 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
575 // ssgGetLight( 0 ) -> setColour( GL_SPECULAR, l->scene_white );
577 // texture parameters
578 // glEnable( GL_TEXTURE_2D );
579 glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
580 glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
582 // glMatrixMode( GL_PROJECTION );
584 ssgSetFOV( current__view->get_h_fov(),
585 current__view->get_v_fov() );
587 double agl = current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER
588 - scenery.get_cur_elev();
591 scene_nearplane = 10.0f;
592 scene_farplane = 120000.0f;
594 scene_nearplane = groundlevel_nearplane->getDoubleValue();
595 scene_farplane = 120000.0f;
598 ssgSetNearFar( scene_nearplane, scene_farplane );
600 // $$$ begin - added VS Renganthan 17 Oct 2K
603 // $$$ end - added VS Renganthan 17 Oct 2K
605 # ifdef FG_NETWORK_OLK
606 if ( fgGetBool("/sim/networking/network-olk") ) {
608 other = head->next; /* put listpointer to start */
609 while ( other != tail) { /* display all except myself */
610 if ( strcmp( other->ipadr, fgd_mcp_ip) != 0) {
611 other->fgd_sel->select(1);
612 sgSetCoord( &fgdpos, other->sgFGD_COORD );
613 other->fgd_pos->setTransform( &fgdpos );
618 // fgd_sel->select(1);
619 // sgCopyMat4( sgTUX, current_view.sgVIEW);
621 // sgSetCoord( &fgdpos, sgFGD_VIEW );
622 // fgd_pos->setTransform( &fgdpos);
626 // position tile nodes and update range selectors
627 global_tile_mgr.prep_ssg_nodes(visibility_meters);
629 if ( fgGetBool("/sim/rendering/skyblend") ) {
630 // draw the sky backdrop
632 // we need a white diffuse light for the phase of the moon
633 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
637 // return to the desired diffuse color
638 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
641 // draw the ssg scene
642 glEnable( GL_DEPTH_TEST );
644 ssgSetNearFar( scene_nearplane, scene_farplane );
645 ssgCullAndDraw( globals->get_scene_graph() );
647 // change state for lighting here
650 // Set punch through fog density
651 glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
653 #ifdef FG_EXPERIMENTAL_LIGHTING
654 // Enable states for drawing points with GL_extension
655 if (glutExtensionSupported("GL_EXT_point_parameters")) {
656 glEnable(GL_POINT_SMOOTH);
657 float quadratic[3] = {1.0, 0.01, 0.0001};
658 // get the address of our OpenGL extensions
660 glPointParameterfEXT = (PFNGLPOINTPARAMETERFEXTPROC)
661 wglGetProcAddress("glPointParameterfEXT");
662 glPointParameterfvEXT = (PFNGLPOINTPARAMETERFVEXTPROC)
663 wglGetProcAddress("glPointParameterfvEXT");
665 // makes the points fade as they move away
666 glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT, quadratic);
667 glPointParameterfEXT(GL_POINT_SIZE_MIN_EXT, 1.0);
670 // Enable states for drawing runway lights with spherical mapping
671 glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
672 glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
673 glEnable(GL_TEXTURE_GEN_S);
674 glEnable(GL_TEXTURE_GEN_T);
676 //Maybe this is not the best way, but it works !!
677 glPolygonMode(GL_FRONT, GL_POINT);
679 glEnable(GL_CULL_FACE);
682 glDisable( GL_LIGHTING );
683 // blending function for runway lights
684 glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) ;
688 ssgSetNearFar( scene_nearplane, scene_farplane );
689 ssgCullAndDraw( lighting );
692 #ifdef FG_EXPERIMENTAL_LIGHTING
693 if (glutExtensionSupported("GL_EXT_point_parameters")) {
694 // Disable states used for runway lighting
695 glPolygonMode(GL_FRONT, GL_FILL);
697 glDisable(GL_TEXTURE_GEN_S);
698 glDisable(GL_TEXTURE_GEN_T);
699 glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT,
700 default_attenuation);
706 if ( fgGetBool("/sim/rendering/skyblend") ) {
707 // draw the sky cloud layers
708 thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
711 globals->get_model_mgr()->draw();
712 globals->get_aircraft_model()->draw();
714 // display HUD && Panel
716 glDisable( GL_DEPTH_TEST );
717 // glDisable( GL_CULL_FACE );
718 // glDisable( GL_TEXTURE_2D );
720 // update the input subsystem
721 current_input.update(delta_time_sec);
723 // update the controls subsystem
724 globals->get_controls()->update(delta_time_sec);
726 hud_and_panel->apply();
729 // Use the hud_and_panel ssgSimpleState for rendering the ATC output
730 // This only works properly if called before the panel call
731 globals->get_ATC_display()->update(delta_time_sec);
733 // update the panel subsystem
734 if ( current_panel != NULL ) {
735 current_panel->update(delta_time_sec);
738 // We can do translucent menus, so why not. :-)
740 glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
742 // glDisable ( GL_BLEND ) ;
744 // glEnable( GL_FOG );
746 globals->get_logger()->update(delta_time_sec);
753 // Update internal time dependent calculations (i.e. flight model)
754 // FIXME: this distinction is obsolete; all subsystems now get delta
756 void fgUpdateTimeDepCalcs() {
757 static bool inited = false;
759 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
761 fgLIGHT *l = &cur_light_params;
766 // Initialize the FDM here if it hasn't been and if we have a
767 // scenery elevation hit.
769 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
770 // << " cur_elev = " << scenery.get_cur_elev() << endl;
772 if ( !cur_fdm_state->get_inited() && scenery.get_cur_elev() > -9990 ) {
773 SG_LOG(SG_FLIGHT,SG_INFO, "Finally initializing fdm");
775 cur_fdm_state->init();
776 if ( cur_fdm_state->get_bound() ) {
777 cur_fdm_state->unbind();
779 cur_fdm_state->bind();
782 // conceptually, the following block could be done for each fdm
784 if ( !cur_fdm_state->get_inited() ) {
785 // do nothing, fdm isn't inited yet
787 // we have been inited, and we are good to go ...
793 globals->get_autopilot()->update(delta_time_sec);
794 cur_fdm_state->update(delta_time_sec);
795 FGSteam::update(delta_time_sec);
798 if ( !strcmp(fgGetString("/sim/view-mode"), "pilot") ) {
799 cur_view_fdm = *cur_fdm_state;
803 globals->get_model_mgr()->update(delta_time_sec);
804 globals->get_aircraft_model()->update(delta_time_sec);
806 // update the view angle
807 globals->get_viewmgr()->update(delta_time_sec);
811 // Update solar system
812 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
813 globals->get_time_params()->getLst(),
814 cur_fdm_state->get_Latitude() );
816 // Update radio stack model
817 current_radiostack->update(delta_time_sec);
821 void fgInitTimeDepCalcs( void ) {
826 static const double alt_adjust_ft = 3.758099;
827 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
830 // What should we do when we have nothing else to do? Let's get ready
831 // for the next move and update the display?
832 static void fgMainLoop( void ) {
834 // Update the elapsed time.
835 current_time_stamp.stamp();
836 delta_time_sec = double(current_time_stamp - last_time_stamp) / 1000000.0;
837 last_time_stamp = current_time_stamp;
838 globals->inc_sim_time_sec( delta_time_sec );
840 static const SGPropertyNode *longitude
841 = fgGetNode("/position/longitude-deg");
842 static const SGPropertyNode *latitude
843 = fgGetNode("/position/latitude-deg");
844 static const SGPropertyNode *altitude
845 = fgGetNode("/position/altitude-ft");
846 static const SGPropertyNode *clock_freeze
847 = fgGetNode("/sim/freeze/clock", true);
848 static const SGPropertyNode *cur_time_override
849 = fgGetNode("/sim/time/cur-time-override", true);
851 static long remainder = 0;
853 #ifdef FANCY_FRAME_COUNTER
857 static time_t last_time = 0;
858 static int frames = 0;
859 #endif // FANCY_FRAME_COUNTER
861 SGTime *t = globals->get_time_params();
863 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
864 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
866 #ifdef FG_NETWORK_OLK
867 if ( fgGetBool("/sim/networking/network-olk") ) {
868 if ( net_is_registered == 0 ) { // We first have to reg. to fgd
869 // printf("FGD: Netupdate\n");
870 fgd_send_com( "A", FGFS_host); // Send Mat4 data
871 fgd_send_com( "B", FGFS_host); // Recv Mat4 data
876 #if defined( ENABLE_PLIB_JOYSTICK )
877 // Read joystick and update control settings
878 // if ( fgGetString("/sim/control-mode") == "joystick" )
882 #elif defined( ENABLE_GLUT_JOYSTICK )
883 // Glut joystick support works by feeding a joystick handler
884 // function to glut. This is taken care of once in the joystick
885 // init routine and we don't have to worry about it again.
888 #ifdef FG_NEW_ENVIRONMENT
889 globals->get_environment_mgr()->update(0); // FIXME: use real delta time
892 // Fix elevation. I'm just sticking this here for now, it should
893 // probably move eventually
895 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
896 scenery.get_cur_elev(),
897 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
898 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
900 if ( scenery.get_cur_elev() > -9990 && cur_fdm_state->get_inited() ) {
901 if ( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER <
902 (scenery.get_cur_elev() + alt_adjust_m - 3.0) ) {
903 // now set aircraft altitude above ground
904 printf("(*) Current Altitude = %.2f < %.2f forcing to %.2f\n",
905 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
906 scenery.get_cur_elev() + alt_adjust_m - 3.0,
907 scenery.get_cur_elev() + alt_adjust_m );
908 cur_fdm_state->set_Altitude( scenery.get_cur_elev()
911 SG_LOG( SG_ALL, SG_DEBUG,
912 "<*> resetting altitude to "
913 << cur_fdm_state->get_Altitude() * SG_FEET_TO_METER
918 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
919 scenery.get_cur_elev(),
920 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
921 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
923 // cout << "Warp = " << globals->get_warp() << endl;
926 static bool last_clock_freeze = false;
928 if ( clock_freeze->getBoolValue() ) {
929 // clock freeze requested
930 if ( cur_time_override->getLongValue() == 0 ) {
931 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
932 globals->set_warp( 0 );
935 // no clock freeze requested
936 if ( last_clock_freeze == true ) {
937 // clock just unfroze, let's set warp as the difference
938 // between frozen time and current time so we don't get a
939 // time jump (and corresponding sky object and lighting
941 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
942 fgSetLong( "/sim/time/cur-time-override", 0 );
944 if ( globals->get_warp_delta() != 0 ) {
945 globals->inc_warp( globals->get_warp_delta() );
949 last_clock_freeze = clock_freeze->getBoolValue();
951 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
952 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
953 cur_time_override->getLongValue(),
954 globals->get_warp() );
956 if ( globals->get_warp_delta() != 0 ) {
957 fgUpdateSkyAndLightingParams();
960 // update magvar model
961 globals->get_mag()->update( longitude->getDoubleValue()
962 * SGD_DEGREES_TO_RADIANS,
963 latitude->getDoubleValue()
964 * SGD_DEGREES_TO_RADIANS,
965 altitude->getDoubleValue() * SG_FEET_TO_METER,
966 globals->get_time_params()->getJD() );
968 // Get elapsed time (in usec) for this past frame
969 elapsed = fgGetTimeInterval();
970 SG_LOG( SG_ALL, SG_DEBUG,
971 "Elapsed time interval is = " << elapsed
972 << ", previous remainder is = " << remainder );
974 // Calculate frame rate average
975 #ifdef FANCY_FRAME_COUNTER
976 /* old fps calculation */
980 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
981 tmp = general.get_frame(i);
983 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
984 general.set_frame(i+1,tmp);
986 tmp = 1000000.0 / (float)elapsed;
987 general.set_frame(0,tmp);
988 // printf("frame[0] = %.2f\n", general.frames[0]);
990 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
991 // printf("ave = %.2f\n", general.frame_rate);
994 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
995 general.set_frame_rate( frames );
996 SG_LOG( SG_ALL, SG_DEBUG,
997 "--> Frame rate is = " << general.get_frame_rate() );
1000 last_time = t->get_cur_time();
1004 // Run ATC subsystem
1005 globals->get_ATC_mgr()->update(delta_time_sec);
1007 // Run the AI subsystem
1008 // globals->get_AI_mgr()->update(delta_time_sec);
1012 // Calculate model iterations needed for next frame
1013 elapsed += remainder;
1015 global_multi_loop = (long)(((double)elapsed * 0.000001) *
1016 fgGetInt("/sim/model-hz"));
1017 remainder = elapsed - ( (global_multi_loop*1000000) /
1018 fgGetInt("/sim/model-hz") );
1019 SG_LOG( SG_ALL, SG_DEBUG,
1020 "Model iterations needed = " << global_multi_loop
1021 << ", new remainder = " << remainder );
1023 // chop max interations to something reasonable if the sim was
1024 // delayed for an excesive amount of time
1025 if ( global_multi_loop > 2.0 * fgGetInt("/sim/model-hz") ) {
1026 global_multi_loop = (int)(2.0 * fgGetInt("/sim/model-hz") );
1031 if ( global_multi_loop > 0 ) {
1032 fgUpdateTimeDepCalcs();
1034 SG_LOG( SG_ALL, SG_DEBUG,
1035 "Elapsed time is zero ... we're zinging" );
1038 #if ! defined( macintosh )
1039 // Do any I/O channel work that might need to be done
1043 // see if we need to load any deferred-load textures
1044 material_lib.load_next_deferred();
1046 // Run audio scheduler
1047 #ifdef ENABLE_AUDIO_SUPPORT
1048 if ( fgGetBool("/sim/sound/audible")
1049 && globals->get_soundmgr()->is_working() ) {
1050 globals->get_fx()->update(1); // FIXME: use dt
1051 globals->get_soundmgr()->update(1); // FIXME: use dt
1058 // see if we need to load any new scenery tiles
1059 double visibility_meters = fgGetDouble("/environment/visibility-m");
1060 global_tile_mgr.update( longitude->getDoubleValue(),
1061 latitude->getDoubleValue(), visibility_meters );
1063 SG_LOG( SG_ALL, SG_DEBUG, "" );
1067 // This is the top level master main function that is registered as
1068 // our idle funciton
1070 // The first few passes take care of initialization things (a couple
1071 // per pass) and once everything has been initialized fgMainLoop from
1074 static void fgIdleFunction ( void ) {
1075 // printf("idle state == %d\n", idle_state);
1077 if ( idle_state == 0 ) {
1078 // Initialize the splash screen right away
1079 if ( fgGetBool("/sim/startup/splash-screen") ) {
1084 } else if ( idle_state == 1 ) {
1085 // Initialize audio support
1086 #ifdef ENABLE_AUDIO_SUPPORT
1088 // Start the intro music
1089 if ( fgGetBool("/sim/startup/intro-music") ) {
1090 SGPath mp3file( globals->get_fg_root() );
1091 mp3file.append( "Sounds/intro.mp3" );
1093 SG_LOG( SG_GENERAL, SG_INFO,
1094 "Starting intro music: " << mp3file.str() );
1096 #if defined( __CYGWIN__ )
1097 string command = "start /m `cygpath -w " + mp3file.str() + "`";
1098 #elif defined( WIN32 )
1099 string command = "start /m " + mp3file.str();
1101 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
1104 system ( command.c_str() );
1107 // This is an 'easter egg' which is kind of a hard thing to
1108 // hide in an open source project -- so I won't try very hard
1109 // to hide it. If you are looking at this now, please, you
1110 // don't want to ruin the surprise. :-) Just forget about it
1111 // and don't look any further; unless it is causing an actual
1112 // problem for you, which it shouldn't, and I hope it doesn't!
1114 if ( globals->get_time_params()->getGmt()->tm_mon == 4
1115 && globals->get_time_params()->getGmt()->tm_mday == 19 )
1117 string url = "http://www.flightgear.org/Music/invasion.mp3";
1118 #if defined( __CYGWIN__ ) || defined( WIN32 )
1119 string command = "start /m " + url;
1121 string command = "mpg123 " + url + "> /dev/null 2>&1";
1123 system( command.c_str() );
1129 } else if ( idle_state == 2 ) {
1130 // These are a few miscellaneous things that aren't really
1131 // "subsystems" but still need to be initialized.
1134 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
1135 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
1140 } else if ( idle_state == 3 ) {
1141 // This is the top level init routine which calls all the
1142 // other subsystem initialization routines. If you are adding
1143 // a subsystem to flightgear, its initialization call should
1144 // located in this routine.
1145 if( !fgInitSubsystems()) {
1146 SG_LOG( SG_GENERAL, SG_ALERT,
1147 "Subsystem initializations failed ..." );
1152 } else if ( idle_state == 4 ) {
1153 // setup OpenGL view parameters
1157 } else if ( idle_state == 5 ) {
1160 } else if ( idle_state == 6 ) {
1164 cout << "Panel visible = " << fgPanelVisible() << endl;
1165 fgReshape( fgGetInt("/sim/startup/xsize"),
1166 fgGetInt("/sim/startup/ysize") );
1169 if ( idle_state == 1000 ) {
1170 // We've finished all our initialization steps, from now on we
1171 // run the main loop.
1173 glutIdleFunc(fgMainLoop);
1175 if ( fgGetBool("/sim/startup/splash-screen") ) {
1176 fgSplashUpdate(0.0);
1181 // options.cxx needs to see this for toggle_panel()
1182 // Handle new window size or exposure
1183 void fgReshape( int width, int height ) {
1186 if ( (!fgGetBool("/sim/virtual-cockpit"))
1187 && fgPanelVisible() && idle_state == 1000 ) {
1188 view_h = (int)(height * (current_panel->getViewHeight() -
1189 current_panel->getYOffset()) / 768.0);
1195 FGViewMgr *viewmgr = globals->get_viewmgr();
1196 for ( int i = 0; i < viewmgr->size(); ++i ) {
1197 viewmgr->get_view(i)->
1198 set_aspect_ratio((float)view_h / (float)width);
1201 glViewport( 0, (GLint)(height - view_h), (GLint)(width), (GLint)(view_h) );
1203 fgSetInt("/sim/startup/xsize", width);
1204 fgSetInt("/sim/startup/ysize", height);
1205 guiInitMouse(width, height);
1207 ssgSetFOV( viewmgr->get_current_view()->get_h_fov(),
1208 viewmgr->get_current_view()->get_v_fov() );
1213 // Initialize GLUT and define a main window
1214 int fgGlutInit( int *argc, char **argv ) {
1216 #if !defined( macintosh )
1217 // GLUT will extract all glut specific options so later on we only
1218 // need wory about our own.
1219 glutInit(argc, argv);
1222 // Define Display Parameters
1223 glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
1225 SG_LOG( SG_GENERAL, SG_INFO, "Opening a window: " <<
1226 fgGetInt("/sim/startup/xsize") << "x"
1227 << fgGetInt("/sim/startup/ysize") );
1229 // Define initial window size
1230 glutInitWindowSize( fgGetInt("/sim/startup/xsize"),
1231 fgGetInt("/sim/startup/ysize") );
1233 // Initialize windows
1234 if ( !fgGetBool("/sim/startup/game-mode")) {
1235 // Open the regular window
1236 glutCreateWindow("FlightGear");
1237 #ifndef GLUT_WRONG_VERSION
1239 // Open the cool new 'game mode' window
1240 char game_mode_str[256];
1241 //#define SYNC_OPENGL_WITH_DESKTOP_SETTINGS
1242 #if defined(WIN32) && defined(SYNC_OPENGL_WITH_DESKTOP_SETTINGS)
1243 #ifndef ENUM_CURRENT_SETTINGS
1244 #define ENUM_CURRENT_SETTINGS ((DWORD)-1)
1245 #define ENUM_REGISTRY_SETTINGS ((DWORD)-2)
1249 dm.dmSize = sizeof(DEVMODE);
1250 EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &dm);
1251 fgSetInt("/sim/startup/xsize", dm.dmPelsWidth);
1252 fgSetInt("/sim/startup/ysize", dm.dmPelsHeight);
1253 glutInitWindowSize( fgGetInt("/sim/startup/xsize"),
1254 fgGetInt("/sim/startup/ysize") );
1255 sprintf( game_mode_str, "%dx%d:%d@%d",
1259 dm.dmDisplayFrequency );
1261 // Open the cool new 'game mode' window
1262 sprintf( game_mode_str, "width=%d height=%d bpp=%d",
1263 fgGetInt("/sim/startup/xsize"),
1264 fgGetInt("/sim/startup/ysize"),
1265 fgGetInt("/sim/rendering/bits-per-pixel"));
1267 #endif // HAVE_WINDOWS_H
1268 SG_LOG( SG_GENERAL, SG_INFO,
1269 "game mode params = " << game_mode_str );
1270 glutGameModeString( game_mode_str );
1271 glutEnterGameMode();
1272 #endif // GLUT_WRONG_VERSION
1275 // This seems to be the absolute earliest in the init sequence
1276 // that these calls will return valid info. Too bad it's after
1277 // we've already created and sized out window. :-(
1278 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
1279 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
1280 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
1281 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
1284 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
1285 general.set_glMaxTexSize( tmp );
1286 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
1288 glGetIntegerv( GL_DEPTH_BITS, &tmp );
1289 general.set_glDepthBits( tmp );
1290 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
1296 // Initialize GLUT event handlers
1297 int fgGlutInitEvents( void ) {
1298 // call fgReshape() on window resizes
1299 glutReshapeFunc( fgReshape );
1301 // keyboard and mouse callbacks are set in FGInput::init
1304 // call guiMouseFunc() whenever our little rodent is used
1305 glutMouseFunc ( guiMouseFunc );
1306 glutMotionFunc (guiMotionFunc );
1307 glutPassiveMotionFunc (guiMotionFunc );
1310 // call fgMainLoop() whenever there is
1311 // nothing else to do
1312 glutIdleFunc( fgIdleFunction );
1315 glutDisplayFunc( fgRenderFrame );
1322 int mainLoop( int argc, char **argv ) {
1324 #if defined( macintosh )
1325 freopen ("stdout.txt", "w", stdout );
1326 freopen ("stderr.txt", "w", stderr );
1327 argc = ccommand( &argv );
1330 // set default log levels
1331 sglog().setLogLevels( SG_ALL, SG_INFO );
1334 #ifdef FLIGHTGEAR_VERSION
1335 version = FLIGHTGEAR_VERSION;
1337 version = "unknown version";
1339 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
1340 << version << endl );
1342 // Allocate global data structures. This needs to happen before
1343 // we parse command line options
1345 globals = new FGGlobals;
1347 #if defined(FG_NEW_ENVIRONMENT)
1348 globals->set_environment_mgr(new FGEnvironmentMgr);
1351 // seed the random number generater
1354 SGRoute *route = new SGRoute;
1355 globals->set_route( route );
1357 FGControls *controls = new FGControls;
1358 globals->set_controls( controls );
1360 string_list *col = new string_list;
1361 globals->set_channel_options_list( col );
1363 // Scan the config file(s) and command line options to see if
1364 // fg_root was specified (ignore all other options for now)
1365 fgInitFGRoot(argc, argv);
1367 // Check for the correct base package version
1368 string base_version = fgBasePackageVersion();
1369 if ( !(base_version == "0.7.9") ) {
1370 // tell the operator how to use this application
1373 SG_LOG( SG_GENERAL, SG_ALERT, "Base package check failed ... "
1374 << "Found version " << base_version << " at: "
1375 << globals->get_fg_root() );
1376 SG_LOG( SG_GENERAL, SG_ALERT, "Please upgrade to version 0.7.9" );
1380 // Initialize the Aircraft directory to "" (UIUC)
1383 // Load the configuration parameters
1384 if ( !fgInitConfig(argc, argv) ) {
1385 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
1389 // Initialize the Window/Graphics environment.
1390 if( !fgGlutInit(&argc, argv) ) {
1391 SG_LOG( SG_GENERAL, SG_ALERT, "GLUT initialization failed ..." );
1395 // Initialize the various GLUT Event Handlers.
1396 if( !fgGlutInitEvents() ) {
1397 SG_LOG( SG_GENERAL, SG_ALERT,
1398 "GLUT event handler initialization failed ..." );
1402 // Initialize plib net interface
1403 netInit( &argc, argv );
1405 // Initialize ssg (from plib). Needs to come before we do any
1406 // other ssg stuff, but after opengl/glut has been initialized.
1409 // Initialize the user interface (we need to do this before
1410 // passing off control to glut and before fgInitGeneral to get our
1414 #ifdef GL_EXT_texture_lod_bias
1415 glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, -0.5 ) ;
1418 // Set position relative to glide slope if requested
1419 fgSetPosFromGlideSlope();
1421 // If we have an explicit, in-range lon/lat, use it.
1422 // If not, check for an airport-id and use that.
1423 // If not, default to the middle of the KSFO field.
1424 // The default values for lon/lat are deliberately out of range
1425 // so that the airport-id can take effect; valid lon/lat will
1426 // override airport-id, however.
1427 double lon_deg = fgGetDouble("/position/longitude-deg");
1428 double lat_deg = fgGetDouble("/position/latitude-deg");
1429 if (lon_deg < -180 || lon_deg > 180 || lat_deg < -90 || lat_deg > 90) {
1430 if ( fgGetString("/sim/startup/airport-id")[0] != '\0' ) {
1431 fgSetPosFromAirportIDandHdg( fgGetString("/sim/startup/airport-id"),
1432 fgGetDouble("/orientation/heading-deg") );
1433 // set tower position (a little off the heading for single
1435 fgSetTowerPosFromAirportID( fgGetString("/sim/startup/airport-id"),
1436 fgGetDouble("orientation/heading") );
1438 // Default to middle of KSFO field
1439 fgSetDouble("/position/longitude-deg", -122.374843);
1440 fgSetDouble("/position/latitude-deg", 37.619002);
1444 SGTime *t = fgInitTime();
1445 globals->set_time_params( t );
1447 // Do some quick general initializations
1448 if( !fgInitGeneral()) {
1449 SG_LOG( SG_GENERAL, SG_ALERT,
1450 "General initializations failed ..." );
1454 SGPath modelpath( globals->get_fg_root() );
1455 ssgModelPath( (char *)modelpath.c_str() );
1458 globals->set_scene_graph(new ssgRoot);
1459 globals->get_scene_graph()->setName( "Scene" );
1461 lighting = new ssgRoot;
1462 lighting->setName( "Lighting" );
1465 globals->set_terrain_branch(new ssgBranch);
1466 globals->get_terrain_branch()->setName( "Terrain" );
1467 globals->get_scene_graph()->addKid( globals->get_terrain_branch() );
1469 globals->set_models_branch(new ssgBranch);
1470 globals->get_models_branch()->setName( "Models" );
1471 globals->get_scene_graph()->addKid( globals->get_models_branch() );
1473 globals->set_aircraft_branch(new ssgBranch);
1474 globals->get_aircraft_branch()->setName( "Aircraft" );
1475 globals->get_scene_graph()->addKid( globals->get_aircraft_branch() );
1478 globals->set_gnd_lights_branch(new ssgBranch);
1479 globals->get_gnd_lights_branch()->setName( "Ground Lighting" );
1480 lighting->addKid( globals->get_gnd_lights_branch() );
1482 globals->set_rwy_lights_branch(new ssgBranch);
1483 globals->get_rwy_lights_branch()->setName( "Runway Lighting" );
1484 lighting->addKid( globals->get_rwy_lights_branch() );
1486 ////////////////////////////////////////////////////////////////////
1487 // Initialize the general model subsystem.
1488 ////////////////////////////////////////////////////////////////////
1490 globals->set_model_mgr(new FGModelMgr);
1491 globals->get_model_mgr()->init();
1492 globals->get_model_mgr()->bind();
1494 ////////////////////////////////////////////////////////////////////
1495 // Initialize the 3D aircraft model subsystem.
1496 ////////////////////////////////////////////////////////////////////
1498 globals->set_aircraft_model(new FGAircraftModel);
1499 globals->get_aircraft_model()->init();
1500 globals->get_aircraft_model()->bind();
1502 ////////////////////////////////////////////////////////////////////
1503 // Initialize the view manager subsystem.
1504 ////////////////////////////////////////////////////////////////////
1506 FGViewMgr *viewmgr = new FGViewMgr;
1507 globals->set_viewmgr( viewmgr );
1512 // Initialize the sky
1513 SGPath ephem_data_path( globals->get_fg_root() );
1514 ephem_data_path.append( "Astro" );
1515 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
1516 ephem->update( globals->get_time_params()->getMjd(),
1517 globals->get_time_params()->getLst(),
1519 globals->set_ephem( ephem );
1523 SGPath sky_tex_path( globals->get_fg_root() );
1524 sky_tex_path.append( "Textures" );
1525 sky_tex_path.append( "Sky" );
1526 thesky->texture_path( sky_tex_path.str() );
1528 thesky->build( 550.0, 550.0,
1529 globals->get_ephem()->getNumPlanets(),
1530 globals->get_ephem()->getPlanets(), 60000.0,
1531 globals->get_ephem()->getNumStars(),
1532 globals->get_ephem()->getStars(), 60000.0 );
1534 if ( fgGetBool("/environment/clouds/status") ) {
1535 // thesky->add_cloud_layer( 2000.0, 200.0, 50.0, 40000.0,
1536 // SG_CLOUD_OVERCAST );
1537 thesky->add_cloud_layer( fgGetDouble("/environment/clouds/altitude-ft") *
1539 200.0, 50.0, 40000.0,
1540 SG_CLOUD_MOSTLY_CLOUDY );
1541 // thesky->add_cloud_layer( 3000.0, 200.0, 50.0, 40000.0,
1542 // SG_CLOUD_MOSTLY_SUNNY );
1543 thesky->add_cloud_layer( 6000.0, 20.0, 10.0, 40000.0,
1547 // Initialize MagVar model
1548 SGMagVar *magvar = new SGMagVar();
1549 globals->set_mag( magvar );
1551 // airport = new ssgBranch;
1552 // airport->setName( "Airport Lighting" );
1553 // lighting->addKid( airport );
1559 #ifdef FG_NETWORK_OLK
1560 // Do the network intialization
1561 if ( fgGetBool("/sim/networking/network-olk") ) {
1562 printf("Multipilot mode %s\n",
1563 fg_net_init( globals->get_scene_graph() ) );
1567 // build our custom render states
1568 fgBuildRenderStates();
1570 // pass control off to the master GLUT event handler
1573 // we never actually get here ... but to avoid compiler warnings,
1579 // $$$ end - added VS Renganathan, 15 Oct 2K
1580 // - added Venky , 12 Nov 2K
1582 #if defined(__linux__) && defined(__i386__)
1584 static void handleFPE (int);
1589 fpu_control_t fpe_flags = 0;
1590 _FPU_GETCW(fpe_flags);
1591 // fpe_flags &= ~_FPU_MASK_IM; // invalid operation
1592 // fpe_flags &= ~_FPU_MASK_DM; // denormalized operand
1593 // fpe_flags &= ~_FPU_MASK_ZM; // zero-divide
1594 // fpe_flags &= ~_FPU_MASK_OM; // overflow
1595 // fpe_flags &= ~_FPU_MASK_UM; // underflow
1596 // fpe_flags &= ~_FPU_MASK_PM; // precision (inexact result)
1597 _FPU_SETCW(fpe_flags);
1598 signal(SIGFPE, handleFPE);
1605 SG_LOG(SG_GENERAL, SG_ALERT, "Floating point interrupt (SIGFPE)");
1609 // Main entry point; catch any exceptions that have made it this far.
1610 int main ( int argc, char **argv ) {
1612 // Enable floating-point exceptions for Linux/x86
1613 #if defined(__linux__) && defined(__i386__)
1617 // Enable floating-point exceptions for Windows
1618 #if defined( _MSC_VER ) && defined( DEBUG )
1619 // Christian, we should document what this does
1620 _control87( _EM_INEXACT, _MCW_EM );
1623 #if defined( HAVE_BC5PLUS )
1624 _control87(MCW_EM, MCW_EM); /* defined in float.h */
1627 // FIXME: add other, more specific
1630 mainLoop(argc, argv);
1631 } catch (sg_throwable &t) {
1632 // We must use cerr rather than
1633 // logging, since logging may be
1635 cerr << "Fatal error: " << t.getFormattedMessage()
1636 << "\n (received from " << t.getOrigin() << ')' << endl;
1644 void fgLoadDCS(void) {
1646 ssgEntity *ship_obj = NULL;
1648 char obj_filename[25];
1650 for ( int k = 0; k < 32; k++ ) {
1654 SGPath tile_path( globals->get_fg_root());
1655 tile_path.append( "Scenery" );
1656 tile_path.append( "Objects.txt" );
1657 sg_gzifstream in( tile_path.str() );
1658 if ( ! in.is_open() ) {
1659 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << tile_path.str() );
1662 SGPath modelpath( globals->get_fg_root() );
1663 modelpath.append( "Models" );
1664 modelpath.append( "Geometry" );
1666 SGPath texturepath( globals->get_fg_root() );
1667 texturepath.append( "Models" );
1668 texturepath.append( "Textures" );
1670 ssgModelPath( (char *)modelpath.c_str() );
1671 ssgTexturePath( (char *)texturepath.c_str() );
1673 ship_sel = new ssgSelector;
1676 while ( ! in.eof() ) {
1678 if ( in.get( c ) && c == '#' ) {
1682 in >> obj_filename >> obj_lat[objc] >> obj_lon[objc] >> obj_alt[objc];
1683 /* cout << endl << obj_filename << " " << obj_lat[objc] << " " << obj_lon[objc] << " " << obj_alt[objc] << endl;
1684 int chj=getchar();*/
1686 obj_lon[objc] *=SGD_DEGREES_TO_RADIANS;
1687 obj_lat[objc] *=SGD_DEGREES_TO_RADIANS;
1689 ship_pos[objc] = new ssgTransform;
1691 // type "repeat" in objects.txt to load one more
1692 // instance of the last object.
1694 if ( strcmp(obj_filename,"repeat") != 0) {
1695 ship_obj = ssgLoad( obj_filename );
1698 if ( ship_obj != NULL ) {
1699 ship_obj->setName(obj_filename);
1701 ship_obj->clrTraversalMaskBits( SSGTRAV_HOT );
1703 ship_obj->setTraversalMaskBits( SSGTRAV_HOT );
1704 ship_pos[objc]->addKid( ship_obj ); // add object to transform node
1705 ship_sel->addKid( ship_pos[objc] ); // add transform node to selector
1706 SG_LOG( SG_TERRAIN, SG_ALERT, "Loaded file: "
1709 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: "
1713 // temporary hack for deck lights - ultimately should move to PLib (when??)
1714 //const char *extn = file_extension ( obj_filename ) ;
1716 ssgVertexArray *lights = new ssgVertexArray( 100 );
1717 ssgVertexArray *lightpoints = new ssgVertexArray( 100 );
1718 ssgVertexArray *lightnormals = new ssgVertexArray( 100 );
1719 ssgVertexArray *lightdir = new ssgVertexArray( 100 );
1720 int ltype[500], light_type;
1721 static int ltcount = 0;
1723 sgVec3 rway_dir,rway_normal,lightpt;
1725 modelpath.append(obj_filename);
1726 sg_gzifstream in1( modelpath.str() );
1727 if ( ! in1.is_open() ) {
1728 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << modelpath.str() );
1730 while ( ! in1.eof() ) {
1732 if ( in1.get( c ) && c == '#' ) {
1737 //cout << token << endl;
1738 if ( token == "runway" ) {
1740 sgSetVec3 (rway_dir, node[0], node[1], node[2] );
1741 } else if ( token == "edgelight" ) {
1743 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1745 } else if ( token == "taxi" ) {
1747 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1749 } else if ( token == "vasi" ) {
1751 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1753 } else if ( token == "threshold" ) {
1755 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1757 } else if ( token == "rabbit" ) {
1759 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1761 } else if ( token == "ols" ) {
1763 sgSetVec3 (rway_ols, node[0], node[1], node[2] );
1765 } else if ( token == "red" ) {
1767 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1769 } else if ( token == "green" ) {
1771 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1773 } else if ( token == "lp" ) {
1775 sgSetVec3 (lightpt, node[0], node[1], node[2] );
1776 lightpoints->add( lightpt );
1777 lightnormals->add( rway_normal );
1778 lightdir->add( rway_dir );
1779 ltype[ltcount]= light_type;
1782 if (in1.eof()) break;
1786 if ( lightpoints->getNum() ) {
1787 ssgBranch *lightpoints_branch;
1788 long int dummy = -999;
1789 dummy_tile = new FGTileEntry((SGBucket)dummy);
1790 dummy_tile->lightmaps_sequence = new ssgSelector;
1791 dummy_tile->ols_transform = new ssgTransform;
1793 // call function to generate the runway lights
1794 lightpoints_branch =
1795 dummy_tile->gen_runway_lights( lightpoints, lightnormals,
1797 lightpoints_brightness->addKid(lightpoints_branch);
1798 lightpoints_transform->addKid(lightpoints_brightness);
1799 //dummy_tile->lightmaps_sequence->setTraversalMaskBits( SSGTRAV_HOT );
1800 lightpoints_transform->addKid( dummy_tile->lightmaps_sequence );
1801 lightpoints_transform->ref();
1802 globals->get_gnd_lights_branch()->addKid( lightpoints_transform );
1806 // end hack for deck lights
1810 if (in.eof()) break;
1814 SG_LOG ( SG_TERRAIN, SG_ALERT, "Finished object processing." );
1816 globals->get_terrain_branch()->addKid( ship_sel ); //add selector node to root node
1823 void fgUpdateDCS (void) {
1825 // double eye_lat,eye_lon,eye_alt;
1826 // static double obj_head;
1827 double sl_radius,obj_latgc;
1828 // float nresultmat[4][4];
1829 // sgMat4 Trans,rothead,rotlon,rot180,rotlat,resultmat1,resultmat2,resultmat3;
1832 // Instantaneous Geodetic Lat/Lon/Alt of moving object
1833 FGADA *fdm = (FGADA *)current_aircraft.fdm_state;
1835 // Deck should be the first object in objects.txt in case of fdm=ada
1837 if (!strcmp(fgGetString("/sim/flight-model"), "ada")) {
1838 if ((fdm->get_iaux(1))==1)
1840 obj_lat[1] = fdm->get_daux(1)*SGD_DEGREES_TO_RADIANS;
1841 obj_lon[1] = fdm->get_daux(2)*SGD_DEGREES_TO_RADIANS;
1842 obj_alt[1] = fdm->get_daux(3);
1843 obj_pitch[1] = fdm->get_faux(1);
1844 obj_roll[1] = fdm->get_faux(2);
1848 for ( int m = 0; m < objc; m++ ) {
1849 //cout << endl << obj_lat[m]*SGD_RADIANS_TO_DEGREES << " " << obj_lon[m]*SGD_RADIANS_TO_DEGREES << " " << obj_alt[m] << " " << objc << endl;
1852 //Geodetic to Geocentric angles for rotation
1853 sgGeodToGeoc(obj_lat[m],obj_alt[m],&sl_radius,&obj_latgc);
1855 //moving object gbs-posn in cartesian coords
1856 Point3D obj_posn = Point3D( obj_lon[m],obj_lat[m],obj_alt[m]);
1857 Point3D obj_pos = sgGeodToCart( obj_posn );
1859 // Translate moving object w.r.t eye
1860 Point3D Objtrans = obj_pos-scenery.get_center();
1865 // rotate dynamic objects for lat,lon & alt and other motion about its axes
1868 sgMakeTransMat4( sgTRANS, bz[0],bz[1],bz[2]);
1870 sgVec3 ship_fwd,ship_rt,ship_up;
1871 sgSetVec3( ship_fwd, 1.0, 0.0, 0.0);//east,roll
1872 sgSetVec3( ship_rt, 0.0, 1.0, 0.0);//up,pitch
1873 sgSetVec3( ship_up, 0.0, 0.0, 1.0); //north,yaw
1875 sgMat4 sgROT_lon, sgROT_lat, sgROT_hdg, sgROT_pitch, sgROT_roll;
1876 sgMakeRotMat4( sgROT_lon, obj_lon[m]*SGD_RADIANS_TO_DEGREES, ship_up );
1877 sgMakeRotMat4( sgROT_lat, 90-obj_latgc*SGD_RADIANS_TO_DEGREES, ship_rt );
1878 sgMakeRotMat4( sgROT_hdg, 180.0, ship_up );
1879 sgMakeRotMat4( sgROT_pitch, obj_pitch[m], ship_rt );
1880 sgMakeRotMat4( sgROT_roll, obj_roll[m], ship_fwd );
1883 sgCopyMat4( sgTUX, sgROT_hdg );
1884 sgPostMultMat4( sgTUX, sgROT_pitch );
1885 sgPostMultMat4( sgTUX, sgROT_roll );
1886 sgPostMultMat4( sgTUX, sgROT_lat );
1887 sgPostMultMat4( sgTUX, sgROT_lon );
1888 sgPostMultMat4( sgTUX, sgTRANS );
1891 sgSetCoord(&shippos, sgTUX );
1892 ship_pos[m]->setTransform( &shippos );
1893 // temporary hack for deck lights - ultimately should move to PLib (when ??)
1895 if (lightpoints_transform) {
1896 lightpoints_transform->setTransform( &shippos );
1897 float sun_angle = cur_light_params.sun_angle * SGD_RADIANS_TO_DEGREES;
1898 if ( sun_angle > 89 ) {
1899 lightpoints_brightness->select(0x01);
1901 lightpoints_brightness->select(0x00);
1910 sgXformPnt3( rp, rway_ols, sgTUX );
1911 vp = globals->get_current_view()->get_view_pos();
1912 to[0] = rp[0]-vp[0];
1913 to[1] = rp[1]-vp[1];
1914 to[2] = rp[2]-vp[2];
1915 float dist = sgLengthVec3( to );
1916 alt = (current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER)-rway_ols[2];
1918 elev = asin(alt/dist)*SGD_RADIANS_TO_DEGREES;
1920 ref_elev = elev - 3.75; // +ve above, -ve below
1924 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1925 // if (ref_elev > 0.51) sel = 0x21;
1926 // if ((ref_elev <= 0.51) & (ref_elev > 0.17)) sel = 0x22;
1927 // if ((ref_elev <= 0.17) & (ref_elev >= -0.17)) sel = 0x24;
1928 // if ((ref_elev < -0.17) & (ref_elev >= -0.51)) sel = 0x28;
1929 // if (ref_elev < -0.51) sel = 0x30;
1930 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1931 dummy_tile->lightmaps_sequence->select(sel);
1934 sgCopyVec3 (up, ship_up);
1936 sgScaleVec3 (up, 4.0*ref_elev*dist/750.0);
1938 sgScaleVec3 (up, 4.0*ref_elev);
1939 dummy_tile->ols_transform->setTransform(up);
1940 //cout << "ref_elev " << ref_elev << endl;
1942 // end hack for deck lights
1945 if ( ship_sel != NULL ) {
1946 ship_sel->select(0xFFFFFFFE); // first object is ownship, added to acmodel
1950 // $$$ end - added VS Renganathan, 15 Oct 2K
1951 // added Venky , 12 Nov 2K