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;
152 #ifndef FG_NEW_ENVIRONMENT
153 # include <WeatherCM/FGLocalWeatherDatabase.h>
155 # include <Environment/environment_mgr.hxx>
160 #include "fg_init.hxx"
162 #include "fg_props.hxx"
163 #include "globals.hxx"
164 #include "splash.hxx"
165 #include "viewmgr.hxx"
166 #include "options.hxx"
167 #include "logger.hxx"
170 # include <console.h> // -dw- for command line dialog
174 FGEventMgr global_events;
176 // This is a record containing a bit of global housekeeping information
179 // Specify our current idle function state. This is used to run all
180 // our initializations out of the glutIdleLoop() so that we can get a
181 // splash screen up and running right away.
182 static int idle_state = 0;
183 static long global_multi_loop;
185 // forward declaration
186 void fgReshape( int width, int height );
188 // fog constants. I'm a little nervous about putting actual code out
189 // here but it seems to work (?)
190 static const double m_log01 = -log( 0.01 );
191 static const double sqrt_m_log01 = sqrt( m_log01 );
192 static GLfloat fog_exp_density;
193 static GLfloat fog_exp2_density;
194 static GLfloat fog_exp2_punch_through;
196 ssgRoot *lighting = NULL;
197 // ssgBranch *airport = NULL;
199 #ifdef FG_NETWORK_OLK
200 ssgSelector *fgd_sel = NULL;
201 ssgTransform *fgd_pos = NULL;
204 // current fdm/position used for view
205 FGInterface cur_view_fdm;
211 sgMat4 copy_of_ssgOpenGLAxisSwapMatrix =
213 { 1.0f, 0.0f, 0.0f, 0.0f },
214 { 0.0f, 0.0f, -1.0f, 0.0f },
215 { 0.0f, 1.0f, 0.0f, 0.0f },
216 { 0.0f, 0.0f, 0.0f, 1.0f }
219 // The following defines flightgear options. Because glutlib will also
220 // want to parse its own options, those options must not be included here
221 // or they will get parsed by the main program option parser. Hence case
222 // is significant for any option added that might be in conflict with
225 // glutlib parses for:
227 // -direct (invalid in Win32)
231 // -indirect (invalid in Win32)
234 // Note that glutlib depends upon strings while this program's
235 // option parser wants only initial characters followed by numbers
240 ssgSimpleState *default_state;
241 ssgSimpleState *hud_and_panel;
242 ssgSimpleState *menus;
244 SGTimeStamp last_time_stamp;
245 SGTimeStamp current_time_stamp;
247 void fgBuildRenderStates( void ) {
248 default_state = new ssgSimpleState;
249 default_state->ref();
250 default_state->disable( GL_TEXTURE_2D );
251 default_state->enable( GL_CULL_FACE );
252 default_state->enable( GL_COLOR_MATERIAL );
253 default_state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
254 default_state->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
255 default_state->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
256 default_state->disable( GL_BLEND );
257 default_state->disable( GL_ALPHA_TEST );
258 default_state->disable( GL_LIGHTING );
260 hud_and_panel = new ssgSimpleState;
261 hud_and_panel->ref();
262 hud_and_panel->disable( GL_CULL_FACE );
263 hud_and_panel->disable( GL_TEXTURE_2D );
264 hud_and_panel->disable( GL_LIGHTING );
265 hud_and_panel->enable( GL_BLEND );
267 menus = new ssgSimpleState;
269 menus->disable( GL_CULL_FACE );
270 menus->disable( GL_TEXTURE_2D );
271 menus->enable( GL_BLEND );
275 // fgInitVisuals() -- Initialize various GL/view parameters
276 void fgInitVisuals( void ) {
279 l = &cur_light_params;
281 #ifndef GLUT_WRONG_VERSION
282 // Go full screen if requested ...
283 if ( fgGetBool("/sim/startup/fullscreen") ) {
288 // If enabled, normal vectors specified with glNormal are scaled
289 // to unit length after transformation. Enabling this has
290 // performance implications. See the docs for glNormal.
291 // glEnable( GL_NORMALIZE );
293 glEnable( GL_LIGHTING );
294 glEnable( GL_LIGHT0 );
295 glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
298 sgSetVec3( sunpos, l->sun_vec[0], l->sun_vec[1], l->sun_vec[2] );
299 ssgGetLight( 0 ) -> setPosition( sunpos );
301 glFogi (GL_FOG_MODE, GL_EXP2);
302 if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
303 (!fgGetBool("/sim/rendering/shading"))) {
304 // if fastest fog requested, or if flat shading force fastest
305 glHint ( GL_FOG_HINT, GL_FASTEST );
306 } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
307 glHint ( GL_FOG_HINT, GL_NICEST );
309 if ( fgGetBool("/sim/rendering/wireframe") ) {
311 glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
314 // This is the default anyways, but it can't hurt
315 glFrontFace ( GL_CCW );
318 // glEnable(GL_POINT_SMOOTH);
319 // glEnable(GL_LINE_SMOOTH);
320 // glEnable(GL_POLYGON_SMOOTH);
324 // For HiRes screen Dumps using Brian Pauls TR Library
325 void trRenderFrame( void ) {
327 if ( fgPanelVisible() ) {
328 GLfloat height = fgGetInt("/sim/startup/ysize");
330 (current_panel->getViewHeight() - current_panel->getYOffset())
331 * (height / 768.0) + 1;
332 glTranslatef( 0.0, view_h, 0.0 );
335 static GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
336 static GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
338 fgLIGHT *l = &cur_light_params;
340 glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
341 l->adj_fog_color[2], l->adj_fog_color[3]);
343 glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
345 // set the opengl state to known default values
346 default_state->force();
349 glFogf ( GL_FOG_DENSITY, fog_exp2_density);
350 glFogi ( GL_FOG_MODE, GL_EXP2 );
351 glFogfv ( GL_FOG_COLOR, l->adj_fog_color );
353 // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
354 // we only update GL_AMBIENT for our lights we will never get
355 // a completely dark scene. So, we set GL_LIGHT_MODEL_AMBIENT
356 // explicitely to black.
357 glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
359 ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
361 // texture parameters
362 glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
363 glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
365 // we need a white diffuse light for the phase of the moon
366 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
369 // draw the ssg scene
370 // return to the desired diffuse color
371 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
372 glEnable( GL_DEPTH_TEST );
373 ssgSetNearFar( scene_nearplane, scene_farplane );
374 ssgCullAndDraw( globals->get_scene_graph() );
377 glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
378 ssgSetNearFar( scene_nearplane, scene_farplane );
379 ssgCullAndDraw( lighting );
381 thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
383 globals->get_model_mgr()->draw();
384 globals->get_aircraft_model()->draw();
386 // need to do this here as hud_and_panel state is static to
387 // main.cxx and HUD and Panel routines have to be called with
388 // knowledge of the the TR struct < see gui.cxx::HighResDump()
389 hud_and_panel->apply();
393 // Update all Visuals (redraws anything graphics related)
394 void fgRenderFrame( void ) {
396 // Update the elapsed time.
397 current_time_stamp.stamp();
398 int dt_ms = (current_time_stamp - last_time_stamp) / 1000L;
399 globals->inc_sim_time_ms( dt_ms );
400 last_time_stamp = current_time_stamp;
402 // Process/manage pending events
403 global_events.update( dt_ms );
405 static const SGPropertyNode *longitude
406 = fgGetNode("/position/longitude-deg");
407 static const SGPropertyNode *latitude
408 = fgGetNode("/position/latitude-deg");
409 static const SGPropertyNode *altitude
410 = fgGetNode("/position/altitude-ft");
411 static const SGPropertyNode *groundlevel_nearplane
412 = fgGetNode("/sim/current-view/ground-level-nearplane-m");
414 // Update the default (kludged) properties.
417 FGViewer *current__view = globals->get_current_view();
419 fgLIGHT *l = &cur_light_params;
420 static double last_visibility = -9999;
423 double actual_visibility = thesky->get_visibility();
424 if ( actual_visibility != last_visibility ) {
425 last_visibility = actual_visibility;
427 fog_exp_density = m_log01 / actual_visibility;
428 fog_exp2_density = sqrt_m_log01 / actual_visibility;
429 fog_exp2_punch_through = sqrt_m_log01 / ( actual_visibility * 2.5 );
433 // GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
434 // GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
435 // GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
436 // GLfloat mat_shininess[] = { 10.0 };
437 GLbitfield clear_mask;
439 if ( idle_state != 1000 ) {
440 // still initializing, draw the splash screen
441 if ( fgGetBool("/sim/startup/splash-screen") ) {
444 // Keep resetting sim time while the sim is initializing
445 globals->set_sim_time_ms( 0.0 );
447 // idle_state is now 1000 meaning we've finished all our
448 // initializations and are running the main loop, so this will
449 // now work without seg faulting the system.
451 // calculate our current position in cartesian space
452 scenery.set_center( scenery.get_next_center() );
455 fgReshape( fgGetInt("/sim/startup/xsize"),
456 fgGetInt("/sim/startup/ysize") );
458 // set the sun position
459 glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
461 clear_mask = GL_DEPTH_BUFFER_BIT;
462 if ( fgGetBool("/sim/rendering/wireframe") ) {
463 clear_mask |= GL_COLOR_BUFFER_BIT;
466 if ( fgGetBool("/sim/rendering/skyblend") ) {
467 if ( fgGetBool("/sim/rendering/textures") ) {
468 // glClearColor(black[0], black[1], black[2], black[3]);
469 glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
470 l->adj_fog_color[2], l->adj_fog_color[3]);
471 clear_mask |= GL_COLOR_BUFFER_BIT;
474 glClearColor(l->sky_color[0], l->sky_color[1],
475 l->sky_color[2], l->sky_color[3]);
476 clear_mask |= GL_COLOR_BUFFER_BIT;
478 glClear( clear_mask );
480 // Tell GL we are switching to model view parameters
482 // I really should create a derived ssg node or use a call
483 // back or something so that I can draw the sky within the
484 // ssgCullAndDraw() function, but for now I just mimic what
485 // ssg does to set up the model view matrix
486 glMatrixMode(GL_MODELVIEW);
488 ssgSetCamera( (sgVec4 *)current__view->get_VIEW() );
490 // set the opengl state to known default values
491 default_state->force();
493 // update fog params if visibility has changed
494 double visibility_meters = fgGetDouble("/environment/visibility-m");
495 thesky->set_visibility(visibility_meters);
497 thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
498 ( global_multi_loop * fgGetInt("/sim/speed-up") )
499 / (double)fgGetInt("/sim/model-hz") );
501 // Set correct opengl fog density
502 glFogf (GL_FOG_DENSITY, fog_exp2_density);
504 // update the sky dome
505 if ( fgGetBool("/sim/rendering/skyblend") ) {
506 /* cout << "thesky->repaint() sky_color = "
507 << cur_light_params.sky_color[0] << " "
508 << cur_light_params.sky_color[1] << " "
509 << cur_light_params.sky_color[2] << " "
510 << cur_light_params.sky_color[3] << endl;
512 << cur_light_params.fog_color[0] << " "
513 << cur_light_params.fog_color[1] << " "
514 << cur_light_params.fog_color[2] << " "
515 << cur_light_params.fog_color[3] << endl;
516 cout << " sun_angle = " << cur_light_params.sun_angle
517 << " moon_angle = " << cur_light_params.moon_angle
519 thesky->repaint( cur_light_params.sky_color,
520 cur_light_params.adj_fog_color,
521 cur_light_params.sun_angle,
522 cur_light_params.moon_angle,
523 globals->get_ephem()->getNumPlanets(),
524 globals->get_ephem()->getPlanets(),
525 globals->get_ephem()->getNumStars(),
526 globals->get_ephem()->getStars() );
528 /* cout << "thesky->reposition( view_pos = " << view_pos[0] << " "
529 << view_pos[1] << " " << view_pos[2] << endl;
530 cout << " zero_elev = " << zero_elev[0] << " "
531 << zero_elev[1] << " " << zero_elev[2]
532 << " lon = " << cur_fdm_state->get_Longitude()
533 << " lat = " << cur_fdm_state->get_Latitude() << endl;
534 cout << " sun_rot = " << cur_light_params.sun_rotation
535 << " gst = " << SGTime::cur_time_params->getGst() << endl;
536 cout << " sun ra = " << globals->get_ephem()->getSunRightAscension()
537 << " sun dec = " << globals->get_ephem()->getSunDeclination()
538 << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
539 << " moon dec = " << globals->get_ephem()->getMoonDeclination() << endl; */
541 thesky->reposition( current__view->get_view_pos(),
542 current__view->get_zero_elev(),
543 current__view->get_world_up(),
544 longitude->getDoubleValue()
545 * SGD_DEGREES_TO_RADIANS,
546 latitude->getDoubleValue()
547 * SGD_DEGREES_TO_RADIANS,
548 altitude->getDoubleValue() * SG_FEET_TO_METER,
549 cur_light_params.sun_rotation,
550 globals->get_time_params()->getGst(),
551 globals->get_ephem()->getSunRightAscension(),
552 globals->get_ephem()->getSunDeclination(),
554 globals->get_ephem()->getMoonRightAscension(),
555 globals->get_ephem()->getMoonDeclination(),
559 glEnable( GL_DEPTH_TEST );
560 if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
562 glFogi( GL_FOG_MODE, GL_EXP2 );
563 glFogfv( GL_FOG_COLOR, l->adj_fog_color );
566 // set sun/lighting parameters
567 ssgGetLight( 0 ) -> setPosition( l->sun_vec );
569 // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
570 // we only update GL_AMBIENT for our lights we will never get
571 // a completely dark scene. So, we set GL_LIGHT_MODEL_AMBIENT
572 // explicitely to black.
573 GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
574 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
575 glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
577 ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
578 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
579 // ssgGetLight( 0 ) -> setColour( GL_SPECULAR, l->scene_white );
581 // texture parameters
582 // glEnable( GL_TEXTURE_2D );
583 glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
584 glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
586 // glMatrixMode( GL_PROJECTION );
588 ssgSetFOV( current__view->get_h_fov(),
589 current__view->get_v_fov() );
591 double agl = current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER
592 - scenery.get_cur_elev();
595 scene_nearplane = 10.0f;
596 scene_farplane = 120000.0f;
598 scene_nearplane = groundlevel_nearplane->getDoubleValue();
599 scene_farplane = 120000.0f;
602 ssgSetNearFar( scene_nearplane, scene_farplane );
604 // $$$ begin - added VS Renganthan 17 Oct 2K
607 // $$$ end - added VS Renganthan 17 Oct 2K
609 # ifdef FG_NETWORK_OLK
610 if ( fgGetBool("/sim/networking/network-olk") ) {
612 other = head->next; /* put listpointer to start */
613 while ( other != tail) { /* display all except myself */
614 if ( strcmp( other->ipadr, fgd_mcp_ip) != 0) {
615 other->fgd_sel->select(1);
616 sgSetCoord( &fgdpos, other->sgFGD_COORD );
617 other->fgd_pos->setTransform( &fgdpos );
622 // fgd_sel->select(1);
623 // sgCopyMat4( sgTUX, current_view.sgVIEW);
625 // sgSetCoord( &fgdpos, sgFGD_VIEW );
626 // fgd_pos->setTransform( &fgdpos);
630 // position tile nodes and update range selectors
631 global_tile_mgr.prep_ssg_nodes(visibility_meters);
633 if ( fgGetBool("/sim/rendering/skyblend") ) {
634 // draw the sky backdrop
636 // we need a white diffuse light for the phase of the moon
637 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
641 // return to the desired diffuse color
642 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
645 // draw the ssg scene
646 glEnable( GL_DEPTH_TEST );
648 ssgSetNearFar( scene_nearplane, scene_farplane );
649 ssgCullAndDraw( globals->get_scene_graph() );
651 // change state for lighting here
654 // Set punch through fog density
655 glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
657 #ifdef FG_EXPERIMENTAL_LIGHTING
658 // Enable states for drawing points with GL_extension
659 if (glutExtensionSupported("GL_EXT_point_parameters")) {
660 glEnable(GL_POINT_SMOOTH);
661 float quadratic[3] = {1.0, 0.01, 0.0001};
662 // get the address of our OpenGL extensions
664 glPointParameterfEXT = (PFNGLPOINTPARAMETERFEXTPROC)
665 wglGetProcAddress("glPointParameterfEXT");
666 glPointParameterfvEXT = (PFNGLPOINTPARAMETERFVEXTPROC)
667 wglGetProcAddress("glPointParameterfvEXT");
669 // makes the points fade as they move away
670 glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT, quadratic);
671 glPointParameterfEXT(GL_POINT_SIZE_MIN_EXT, 1.0);
674 // Enable states for drawing runway lights with spherical mapping
675 glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
676 glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
677 glEnable(GL_TEXTURE_GEN_S);
678 glEnable(GL_TEXTURE_GEN_T);
680 //Maybe this is not the best way, but it works !!
681 glPolygonMode(GL_FRONT, GL_POINT);
683 glEnable(GL_CULL_FACE);
686 glDisable( GL_LIGHTING );
687 // blending function for runway lights
688 glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) ;
692 ssgSetNearFar( scene_nearplane, scene_farplane );
693 ssgCullAndDraw( lighting );
696 #ifdef FG_EXPERIMENTAL_LIGHTING
697 if (glutExtensionSupported("GL_EXT_point_parameters")) {
698 // Disable states used for runway lighting
699 glPolygonMode(GL_FRONT, GL_FILL);
701 glDisable(GL_TEXTURE_GEN_S);
702 glDisable(GL_TEXTURE_GEN_T);
703 glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT,
704 default_attenuation);
710 if ( fgGetBool("/sim/rendering/skyblend") ) {
711 // draw the sky cloud layers
712 thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
715 globals->get_model_mgr()->draw();
716 globals->get_aircraft_model()->draw();
718 // display HUD && Panel
720 glDisable( GL_DEPTH_TEST );
721 // glDisable( GL_CULL_FACE );
722 // glDisable( GL_TEXTURE_2D );
724 // update the input subsystem
725 current_input.update(dt_ms);
727 // update the controls subsystem
728 globals->get_controls()->update(dt_ms);
730 hud_and_panel->apply();
733 // Use the hud_and_panel ssgSimpleState for rendering the ATC output
734 // This only works properly if called before the panel call
735 globals->get_ATC_display()->update(dt_ms);
737 // update the panel subsystem
738 if ( current_panel != NULL ) {
739 current_panel->update(dt_ms);
742 // We can do translucent menus, so why not. :-)
744 glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
746 // glDisable ( GL_BLEND ) ;
748 // glEnable( GL_FOG );
750 globals->get_logger()->update(dt_ms);
757 // Update internal time dependent calculations (i.e. flight model)
758 void fgUpdateTimeDepCalcs() {
759 static bool inited = false;
760 static const SGPropertyNode *master_freeze
761 = fgGetNode("/sim/freeze/master");
763 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
765 fgLIGHT *l = &cur_light_params;
770 // Initialize the FDM here if it hasn't been and if we have a
771 // scenery elevation hit.
773 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
774 // << " cur_elev = " << scenery.get_cur_elev() << endl;
776 if ( !cur_fdm_state->get_inited() && scenery.get_cur_elev() > -9990 ) {
777 SG_LOG(SG_FLIGHT,SG_INFO, "Finally initializing fdm");
779 cur_fdm_state->init();
780 if ( cur_fdm_state->get_bound() ) {
781 cur_fdm_state->unbind();
783 cur_fdm_state->bind();
786 // conceptually, the following block could be done for each fdm
788 if ( !cur_fdm_state->get_inited() ) {
789 // do nothing, fdm isn't inited yet
790 } else if ( master_freeze->getBoolValue() ) {
791 // we are frozen, run the fdm's with 0 time slices in case
792 // they want to do something with that.
794 cur_fdm_state->update( 0 );
795 FGSteam::update( 0 );
797 // we have been inited, and we are not frozen, we are good to go ...
800 cur_fdm_state->stamp();
806 long elapsed = current - cur_fdm_state->get_time_stamp();
807 cur_fdm_state->set_time_stamp( current );
808 elapsed += cur_fdm_state->get_remainder();
809 // cout << "elapsed = " << elapsed << endl;
810 // cout << "dt = " << cur_fdm_state->get_delta_t() << endl;
811 multi_loop = (long)(((double)elapsed * 0.000001) /
812 cur_fdm_state->get_delta_t() );
813 cur_fdm_state->set_multi_loop( multi_loop );
814 long remainder = elapsed - (long)( (multi_loop*1000000) *
815 cur_fdm_state->get_delta_t() );
816 cur_fdm_state->set_remainder( remainder );
817 // cout << "remainder = " << remainder << endl;
819 // chop max interations to something reasonable if the sim was
820 // delayed for an excesive amount of time
821 if ( multi_loop > 2.0 / cur_fdm_state->get_delta_t() ) {
822 multi_loop = (int)(2.0 / cur_fdm_state->get_delta_t());
823 cur_fdm_state->set_remainder( 0 );
826 // cout << "multi_loop = " << multi_loop << endl;
827 for ( i = 0; i < multi_loop * fgGetInt("/sim/speed-up"); ++i ) {
828 // run Autopilot system
829 globals->get_autopilot()->update(0); // FIXME: use real dt
832 cur_fdm_state->update( 1 );
834 FGSteam::update( multi_loop * fgGetInt("/sim/speed-up") );
837 if ( !strcmp(fgGetString("/sim/view-mode"), "pilot") ) {
838 cur_view_fdm = *cur_fdm_state;
843 globals->get_model_mgr()->update(multi_loop);
844 globals->get_aircraft_model()->update(multi_loop);
846 // update the view angle
847 globals->get_viewmgr()->update(multi_loop);
851 // Update solar system
852 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
853 globals->get_time_params()->getLst(),
854 cur_fdm_state->get_Latitude() );
856 // Update radio stack model
857 current_radiostack->update(multi_loop);
861 void fgInitTimeDepCalcs( void ) {
866 static const double alt_adjust_ft = 3.758099;
867 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
870 // What should we do when we have nothing else to do? Let's get ready
871 // for the next move and update the display?
872 static void fgMainLoop( void ) {
873 static const SGPropertyNode *longitude
874 = fgGetNode("/position/longitude-deg");
875 static const SGPropertyNode *latitude
876 = fgGetNode("/position/latitude-deg");
877 static const SGPropertyNode *altitude
878 = fgGetNode("/position/altitude-ft");
879 static const SGPropertyNode *clock_freeze
880 = fgGetNode("/sim/freeze/clock", true);
881 static const SGPropertyNode *cur_time_override
882 = fgGetNode("/sim/time/cur-time-override", true);
884 static long remainder = 0;
886 #ifdef FANCY_FRAME_COUNTER
890 static time_t last_time = 0;
891 static int frames = 0;
892 #endif // FANCY_FRAME_COUNTER
894 SGTime *t = globals->get_time_params();
896 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
897 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
899 #ifdef FG_NETWORK_OLK
900 if ( fgGetBool("/sim/networking/network-olk") ) {
901 if ( net_is_registered == 0 ) { // We first have to reg. to fgd
902 // printf("FGD: Netupdate\n");
903 fgd_send_com( "A", FGFS_host); // Send Mat4 data
904 fgd_send_com( "B", FGFS_host); // Recv Mat4 data
909 #if defined( ENABLE_PLIB_JOYSTICK )
910 // Read joystick and update control settings
911 // if ( fgGetString("/sim/control-mode") == "joystick" )
915 #elif defined( ENABLE_GLUT_JOYSTICK )
916 // Glut joystick support works by feeding a joystick handler
917 // function to glut. This is taken care of once in the joystick
918 // init routine and we don't have to worry about it again.
921 #ifdef FG_NEW_ENVIRONMENT
922 globals->get_environment_mgr()->update(0); // FIXME: use real delta time
925 // Fix elevation. I'm just sticking this here for now, it should
926 // probably move eventually
928 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
929 scenery.get_cur_elev(),
930 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
931 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
933 if ( scenery.get_cur_elev() > -9990 && cur_fdm_state->get_inited() ) {
934 if ( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER <
935 (scenery.get_cur_elev() + alt_adjust_m - 3.0) ) {
936 // now set aircraft altitude above ground
937 printf("(*) Current Altitude = %.2f < %.2f forcing to %.2f\n",
938 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
939 scenery.get_cur_elev() + alt_adjust_m - 3.0,
940 scenery.get_cur_elev() + alt_adjust_m );
941 cur_fdm_state->set_Altitude( scenery.get_cur_elev()
944 SG_LOG( SG_ALL, SG_DEBUG,
945 "<*> resetting altitude to "
946 << cur_fdm_state->get_Altitude() * SG_FEET_TO_METER
951 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
952 scenery.get_cur_elev(),
953 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
954 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
956 // cout << "Warp = " << globals->get_warp() << endl;
959 static bool last_clock_freeze = false;
961 if ( clock_freeze->getBoolValue() ) {
962 // clock freeze requested
963 if ( cur_time_override->getLongValue() == 0 ) {
964 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
965 globals->set_warp( 0 );
968 // no clock freeze requested
969 if ( last_clock_freeze == true ) {
970 // clock just unfroze, let's set warp as the difference
971 // between frozen time and current time so we don't get a
972 // time jump (and corresponding sky object and lighting
974 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
975 fgSetLong( "/sim/time/cur-time-override", 0 );
977 if ( globals->get_warp_delta() != 0 ) {
978 globals->inc_warp( globals->get_warp_delta() );
982 last_clock_freeze = clock_freeze->getBoolValue();
984 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
985 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
986 cur_time_override->getLongValue(),
987 globals->get_warp() );
989 if ( globals->get_warp_delta() != 0 ) {
990 fgUpdateSkyAndLightingParams();
993 // update magvar model
994 globals->get_mag()->update( longitude->getDoubleValue()
995 * SGD_DEGREES_TO_RADIANS,
996 latitude->getDoubleValue()
997 * SGD_DEGREES_TO_RADIANS,
998 altitude->getDoubleValue() * SG_FEET_TO_METER,
999 globals->get_time_params()->getJD() );
1001 // Get elapsed time (in usec) for this past frame
1002 elapsed = fgGetTimeInterval();
1003 SG_LOG( SG_ALL, SG_DEBUG,
1004 "Elapsed time interval is = " << elapsed
1005 << ", previous remainder is = " << remainder );
1007 // Calculate frame rate average
1008 #ifdef FANCY_FRAME_COUNTER
1009 /* old fps calculation */
1010 if ( elapsed > 0 ) {
1013 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
1014 tmp = general.get_frame(i);
1016 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
1017 general.set_frame(i+1,tmp);
1019 tmp = 1000000.0 / (float)elapsed;
1020 general.set_frame(0,tmp);
1021 // printf("frame[0] = %.2f\n", general.frames[0]);
1023 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
1024 // printf("ave = %.2f\n", general.frame_rate);
1027 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
1028 general.set_frame_rate( frames );
1029 SG_LOG( SG_ALL, SG_DEBUG,
1030 "--> Frame rate is = " << general.get_frame_rate() );
1033 last_time = t->get_cur_time();
1037 // Run ATC subsystem
1038 globals->get_ATC_mgr()->update(1); // FIXME - use real dt.
1040 // Run the AI subsystem
1041 // globals->get_AI_mgr()->update(1); // FIXME - use real dt.
1045 // Calculate model iterations needed for next frame
1046 elapsed += remainder;
1048 global_multi_loop = (long)(((double)elapsed * 0.000001) *
1049 fgGetInt("/sim/model-hz"));
1050 remainder = elapsed - ( (global_multi_loop*1000000) /
1051 fgGetInt("/sim/model-hz") );
1052 SG_LOG( SG_ALL, SG_DEBUG,
1053 "Model iterations needed = " << global_multi_loop
1054 << ", new remainder = " << remainder );
1056 // chop max interations to something reasonable if the sim was
1057 // delayed for an excesive amount of time
1058 if ( global_multi_loop > 2.0 * fgGetInt("/sim/model-hz") ) {
1059 global_multi_loop = (int)(2.0 * fgGetInt("/sim/model-hz") );
1064 if ( global_multi_loop > 0 ) {
1065 fgUpdateTimeDepCalcs();
1067 SG_LOG( SG_ALL, SG_DEBUG,
1068 "Elapsed time is zero ... we're zinging" );
1071 #if ! defined( macintosh )
1072 // Do any I/O channel work that might need to be done
1076 // see if we need to load any deferred-load textures
1077 material_lib.load_next_deferred();
1079 // Run audio scheduler
1080 #ifdef ENABLE_AUDIO_SUPPORT
1081 if ( fgGetBool("/sim/sound/audible")
1082 && globals->get_soundmgr()->is_working() ) {
1083 globals->get_fx()->update(1); // FIXME: use dt
1084 globals->get_soundmgr()->update(1); // FIXME: use dt
1091 // see if we need to load any new scenery tiles
1092 double visibility_meters = fgGetDouble("/environment/visibility-m");
1093 global_tile_mgr.update( longitude->getDoubleValue(),
1094 latitude->getDoubleValue(), visibility_meters );
1096 SG_LOG( SG_ALL, SG_DEBUG, "" );
1100 // This is the top level master main function that is registered as
1101 // our idle funciton
1103 // The first few passes take care of initialization things (a couple
1104 // per pass) and once everything has been initialized fgMainLoop from
1107 static void fgIdleFunction ( void ) {
1108 // printf("idle state == %d\n", idle_state);
1110 if ( idle_state == 0 ) {
1111 // Initialize the splash screen right away
1112 if ( fgGetBool("/sim/startup/splash-screen") ) {
1117 } else if ( idle_state == 1 ) {
1118 // Initialize audio support
1119 #ifdef ENABLE_AUDIO_SUPPORT
1121 // Start the intro music
1122 if ( fgGetBool("/sim/startup/intro-music") ) {
1123 SGPath mp3file( globals->get_fg_root() );
1124 mp3file.append( "Sounds/intro.mp3" );
1126 SG_LOG( SG_GENERAL, SG_INFO,
1127 "Starting intro music: " << mp3file.str() );
1129 #if defined( __CYGWIN__ )
1130 string command = "start /m `cygpath -w " + mp3file.str() + "`";
1131 #elif defined( WIN32 )
1132 string command = "start /m " + mp3file.str();
1134 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
1137 system ( command.c_str() );
1140 // This is an 'easter egg' which is kind of a hard thing to
1141 // hide in an open source project -- so I won't try very hard
1142 // to hide it. If you are looking at this now, please, you
1143 // don't want to ruin the surprise. :-) Just forget about it
1144 // and don't look any further; unless it is causing an actual
1145 // problem for you, which it shouldn't, and I hope it doesn't!
1147 if ( globals->get_time_params()->getGmt()->tm_mon == 4
1148 && globals->get_time_params()->getGmt()->tm_mday == 19 )
1150 string url = "http://www.flightgear.org/Music/invasion.mp3";
1151 #if defined( __CYGWIN__ ) || defined( WIN32 )
1152 string command = "start /m " + url;
1154 string command = "mpg123 " + url + "> /dev/null 2>&1";
1156 system( command.c_str() );
1162 } else if ( idle_state == 2 ) {
1163 // These are a few miscellaneous things that aren't really
1164 // "subsystems" but still need to be initialized.
1167 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
1168 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
1173 } else if ( idle_state == 3 ) {
1174 // This is the top level init routine which calls all the
1175 // other subsystem initialization routines. If you are adding
1176 // a subsystem to flightgear, its initialization call should
1177 // located in this routine.
1178 if( !fgInitSubsystems()) {
1179 SG_LOG( SG_GENERAL, SG_ALERT,
1180 "Subsystem initializations failed ..." );
1185 } else if ( idle_state == 4 ) {
1186 // setup OpenGL view parameters
1190 } else if ( idle_state == 5 ) {
1193 } else if ( idle_state == 6 ) {
1197 cout << "Panel visible = " << fgPanelVisible() << endl;
1198 fgReshape( fgGetInt("/sim/startup/xsize"),
1199 fgGetInt("/sim/startup/ysize") );
1202 if ( idle_state == 1000 ) {
1203 // We've finished all our initialization steps, from now on we
1204 // run the main loop.
1206 glutIdleFunc(fgMainLoop);
1208 if ( fgGetBool("/sim/startup/splash-screen") ) {
1209 fgSplashUpdate(0.0);
1214 // options.cxx needs to see this for toggle_panel()
1215 // Handle new window size or exposure
1216 void fgReshape( int width, int height ) {
1219 if ( (!fgGetBool("/sim/virtual-cockpit"))
1220 && fgPanelVisible() && idle_state == 1000 ) {
1221 view_h = (int)(height * (current_panel->getViewHeight() -
1222 current_panel->getYOffset()) / 768.0);
1228 FGViewMgr *viewmgr = globals->get_viewmgr();
1229 for ( int i = 0; i < viewmgr->size(); ++i ) {
1230 viewmgr->get_view(i)->
1231 set_aspect_ratio((float)view_h / (float)width);
1234 glViewport( 0, (GLint)(height - view_h), (GLint)(width), (GLint)(view_h) );
1236 fgSetInt("/sim/startup/xsize", width);
1237 fgSetInt("/sim/startup/ysize", height);
1238 guiInitMouse(width, height);
1240 ssgSetFOV( viewmgr->get_current_view()->get_h_fov(),
1241 viewmgr->get_current_view()->get_v_fov() );
1246 // Initialize GLUT and define a main window
1247 int fgGlutInit( int *argc, char **argv ) {
1249 #if !defined( macintosh )
1250 // GLUT will extract all glut specific options so later on we only
1251 // need wory about our own.
1252 glutInit(argc, argv);
1255 // Define Display Parameters
1256 glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
1258 SG_LOG( SG_GENERAL, SG_INFO, "Opening a window: " <<
1259 fgGetInt("/sim/startup/xsize") << "x"
1260 << fgGetInt("/sim/startup/ysize") );
1262 // Define initial window size
1263 glutInitWindowSize( fgGetInt("/sim/startup/xsize"),
1264 fgGetInt("/sim/startup/ysize") );
1266 // Initialize windows
1267 if ( !fgGetBool("/sim/startup/game-mode")) {
1268 // Open the regular window
1269 glutCreateWindow("FlightGear");
1270 #ifndef GLUT_WRONG_VERSION
1272 // Open the cool new 'game mode' window
1273 char game_mode_str[256];
1274 //#define SYNC_OPENGL_WITH_DESKTOP_SETTINGS
1275 #if defined(WIN32) && defined(SYNC_OPENGL_WITH_DESKTOP_SETTINGS)
1276 #ifndef ENUM_CURRENT_SETTINGS
1277 #define ENUM_CURRENT_SETTINGS ((DWORD)-1)
1278 #define ENUM_REGISTRY_SETTINGS ((DWORD)-2)
1282 dm.dmSize = sizeof(DEVMODE);
1283 EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &dm);
1284 fgSetInt("/sim/startup/xsize", dm.dmPelsWidth);
1285 fgSetInt("/sim/startup/ysize", dm.dmPelsHeight);
1286 glutInitWindowSize( fgGetInt("/sim/startup/xsize"),
1287 fgGetInt("/sim/startup/ysize") );
1288 sprintf( game_mode_str, "%dx%d:%d@%d",
1292 dm.dmDisplayFrequency );
1294 // Open the cool new 'game mode' window
1295 sprintf( game_mode_str, "width=%d height=%d bpp=%d",
1296 fgGetInt("/sim/startup/xsize"),
1297 fgGetInt("/sim/startup/ysize"),
1298 fgGetInt("/sim/rendering/bits-per-pixel"));
1300 #endif // HAVE_WINDOWS_H
1301 SG_LOG( SG_GENERAL, SG_INFO,
1302 "game mode params = " << game_mode_str );
1303 glutGameModeString( game_mode_str );
1304 glutEnterGameMode();
1305 #endif // GLUT_WRONG_VERSION
1308 // This seems to be the absolute earliest in the init sequence
1309 // that these calls will return valid info. Too bad it's after
1310 // we've already created and sized out window. :-(
1311 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
1312 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
1313 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
1314 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
1317 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
1318 general.set_glMaxTexSize( tmp );
1319 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
1321 glGetIntegerv( GL_DEPTH_BITS, &tmp );
1322 general.set_glDepthBits( tmp );
1323 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
1329 // Initialize GLUT event handlers
1330 int fgGlutInitEvents( void ) {
1331 // call fgReshape() on window resizes
1332 glutReshapeFunc( fgReshape );
1334 // keyboard and mouse callbacks are set in FGInput::init
1337 // call guiMouseFunc() whenever our little rodent is used
1338 glutMouseFunc ( guiMouseFunc );
1339 glutMotionFunc (guiMotionFunc );
1340 glutPassiveMotionFunc (guiMotionFunc );
1343 // call fgMainLoop() whenever there is
1344 // nothing else to do
1345 glutIdleFunc( fgIdleFunction );
1348 glutDisplayFunc( fgRenderFrame );
1355 int mainLoop( int argc, char **argv ) {
1357 #if defined( macintosh )
1358 freopen ("stdout.txt", "w", stdout );
1359 freopen ("stderr.txt", "w", stderr );
1360 argc = ccommand( &argv );
1363 // set default log levels
1364 sglog().setLogLevels( SG_ALL, SG_INFO );
1367 #ifdef FLIGHTGEAR_VERSION
1368 version = FLIGHTGEAR_VERSION;
1370 version = "unknown version";
1372 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
1373 << version << endl );
1375 // Allocate global data structures. This needs to happen before
1376 // we parse command line options
1378 globals = new FGGlobals;
1380 #if defined(FG_NEW_ENVIRONMENT)
1381 globals->set_environment_mgr(new FGEnvironmentMgr);
1384 // seed the random number generater
1387 SGRoute *route = new SGRoute;
1388 globals->set_route( route );
1390 FGControls *controls = new FGControls;
1391 globals->set_controls( controls );
1393 string_list *col = new string_list;
1394 globals->set_channel_options_list( col );
1396 // Scan the config file(s) and command line options to see if
1397 // fg_root was specified (ignore all other options for now)
1398 fgInitFGRoot(argc, argv);
1400 // Check for the correct base package version
1401 string base_version = fgBasePackageVersion();
1402 if ( !(base_version == "0.7.9") ) {
1403 // tell the operator how to use this application
1406 SG_LOG( SG_GENERAL, SG_ALERT, "Base package check failed ... "
1407 << "Found version " << base_version << " at: "
1408 << globals->get_fg_root() );
1409 SG_LOG( SG_GENERAL, SG_ALERT, "Please upgrade to version 0.7.9" );
1413 // Initialize the Aircraft directory to "" (UIUC)
1416 // Load the configuration parameters
1417 if ( !fgInitConfig(argc, argv) ) {
1418 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
1422 // Initialize the Window/Graphics environment.
1423 if( !fgGlutInit(&argc, argv) ) {
1424 SG_LOG( SG_GENERAL, SG_ALERT, "GLUT initialization failed ..." );
1428 // Initialize the various GLUT Event Handlers.
1429 if( !fgGlutInitEvents() ) {
1430 SG_LOG( SG_GENERAL, SG_ALERT,
1431 "GLUT event handler initialization failed ..." );
1435 // Initialize plib net interface
1436 netInit( &argc, argv );
1438 // Initialize ssg (from plib). Needs to come before we do any
1439 // other ssg stuff, but after opengl/glut has been initialized.
1442 // Initialize the user interface (we need to do this before
1443 // passing off control to glut and before fgInitGeneral to get our
1447 #ifdef GL_EXT_texture_lod_bias
1448 glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, -0.5 ) ;
1451 // Set position relative to glide slope if requested
1452 fgSetPosFromGlideSlope();
1454 // set current_options lon/lat if an airport id is specified
1455 // cout << "3. airport_id = " << fgGetString("/sim/startup/airport-id") << endl;
1456 if ( fgGetString("/sim/startup/airport-id")[0] != '\0' ) {
1457 // fgSetPosFromAirportID( fgGetString("/sim/startup/airport-id") );
1458 fgSetPosFromAirportIDandHdg( fgGetString("/sim/startup/airport-id"),
1459 fgGetDouble("/orientation/heading-deg") );
1460 // set tower position (a little off the heading for single runway airports)
1461 fgSetTowerPosFromAirportID( fgGetString("/sim/startup/airport-id"), fgGetDouble("orientation/heading") );
1464 SGTime *t = fgInitTime();
1465 globals->set_time_params( t );
1467 // Do some quick general initializations
1468 if( !fgInitGeneral()) {
1469 SG_LOG( SG_GENERAL, SG_ALERT,
1470 "General initializations failed ..." );
1474 SGPath modelpath( globals->get_fg_root() );
1475 ssgModelPath( (char *)modelpath.c_str() );
1478 globals->set_scene_graph(new ssgRoot);
1479 globals->get_scene_graph()->setName( "Scene" );
1481 lighting = new ssgRoot;
1482 lighting->setName( "Lighting" );
1485 globals->set_terrain_branch(new ssgBranch);
1486 globals->get_terrain_branch()->setName( "Terrain" );
1487 globals->get_scene_graph()->addKid( globals->get_terrain_branch() );
1489 globals->set_models_branch(new ssgBranch);
1490 globals->get_models_branch()->setName( "Models" );
1491 globals->get_scene_graph()->addKid( globals->get_models_branch() );
1493 globals->set_aircraft_branch(new ssgBranch);
1494 globals->get_aircraft_branch()->setName( "Aircraft" );
1495 globals->get_scene_graph()->addKid( globals->get_aircraft_branch() );
1498 globals->set_gnd_lights_branch(new ssgBranch);
1499 globals->get_gnd_lights_branch()->setName( "Ground Lighting" );
1500 lighting->addKid( globals->get_gnd_lights_branch() );
1502 globals->set_rwy_lights_branch(new ssgBranch);
1503 globals->get_rwy_lights_branch()->setName( "Runway Lighting" );
1504 lighting->addKid( globals->get_rwy_lights_branch() );
1506 ////////////////////////////////////////////////////////////////////
1507 // Initialize the general model subsystem.
1508 ////////////////////////////////////////////////////////////////////
1510 globals->set_model_mgr(new FGModelMgr);
1511 globals->get_model_mgr()->init();
1512 globals->get_model_mgr()->bind();
1514 ////////////////////////////////////////////////////////////////////
1515 // Initialize the 3D aircraft model subsystem.
1516 ////////////////////////////////////////////////////////////////////
1518 globals->set_aircraft_model(new FGAircraftModel);
1519 globals->get_aircraft_model()->init();
1520 globals->get_aircraft_model()->bind();
1522 ////////////////////////////////////////////////////////////////////
1523 // Initialize the view manager subsystem.
1524 ////////////////////////////////////////////////////////////////////
1526 FGViewMgr *viewmgr = new FGViewMgr;
1527 globals->set_viewmgr( viewmgr );
1532 // Initialize the sky
1533 SGPath ephem_data_path( globals->get_fg_root() );
1534 ephem_data_path.append( "Astro" );
1535 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
1536 ephem->update( globals->get_time_params()->getMjd(),
1537 globals->get_time_params()->getLst(),
1539 globals->set_ephem( ephem );
1543 SGPath sky_tex_path( globals->get_fg_root() );
1544 sky_tex_path.append( "Textures" );
1545 sky_tex_path.append( "Sky" );
1546 thesky->texture_path( sky_tex_path.str() );
1548 thesky->build( 550.0, 550.0,
1549 globals->get_ephem()->getNumPlanets(),
1550 globals->get_ephem()->getPlanets(), 60000.0,
1551 globals->get_ephem()->getNumStars(),
1552 globals->get_ephem()->getStars(), 60000.0 );
1554 if ( fgGetBool("/environment/clouds/status") ) {
1555 // thesky->add_cloud_layer( 2000.0, 200.0, 50.0, 40000.0,
1556 // SG_CLOUD_OVERCAST );
1557 thesky->add_cloud_layer( fgGetDouble("/environment/clouds/altitude-ft") *
1559 200.0, 50.0, 40000.0,
1560 SG_CLOUD_MOSTLY_CLOUDY );
1561 // thesky->add_cloud_layer( 3000.0, 200.0, 50.0, 40000.0,
1562 // SG_CLOUD_MOSTLY_SUNNY );
1563 thesky->add_cloud_layer( 6000.0, 20.0, 10.0, 40000.0,
1567 // Initialize MagVar model
1568 SGMagVar *magvar = new SGMagVar();
1569 globals->set_mag( magvar );
1571 // airport = new ssgBranch;
1572 // airport->setName( "Airport Lighting" );
1573 // lighting->addKid( airport );
1579 #ifdef FG_NETWORK_OLK
1580 // Do the network intialization
1581 if ( fgGetBool("/sim/networking/network-olk") ) {
1582 printf("Multipilot mode %s\n",
1583 fg_net_init( globals->get_scene_graph() ) );
1587 // build our custom render states
1588 fgBuildRenderStates();
1590 // pass control off to the master GLUT event handler
1593 // we never actually get here ... but to avoid compiler warnings,
1599 // $$$ end - added VS Renganathan, 15 Oct 2K
1600 // - added Venky , 12 Nov 2K
1602 #if defined(__linux__) && defined(__i386__)
1604 static void handleFPE (int);
1609 fpu_control_t fpe_flags = 0;
1610 _FPU_GETCW(fpe_flags);
1611 // fpe_flags &= ~_FPU_MASK_IM; // invalid operation
1612 // fpe_flags &= ~_FPU_MASK_DM; // denormalized operand
1613 // fpe_flags &= ~_FPU_MASK_ZM; // zero-divide
1614 // fpe_flags &= ~_FPU_MASK_OM; // overflow
1615 // fpe_flags &= ~_FPU_MASK_UM; // underflow
1616 // fpe_flags &= ~_FPU_MASK_PM; // precision (inexact result)
1617 _FPU_SETCW(fpe_flags);
1618 signal(SIGFPE, handleFPE);
1625 SG_LOG(SG_GENERAL, SG_ALERT, "Floating point interrupt (SIGFPE)");
1629 // Main entry point; catch any exceptions that have made it this far.
1630 int main ( int argc, char **argv ) {
1632 // Enable floating-point exceptions for Linux/x86
1633 #if defined(__linux__) && defined(__i386__)
1637 // Enable floating-point exceptions for Windows
1638 #if defined( _MSC_VER ) && defined( DEBUG )
1639 // Christian, we should document what this does
1640 _control87( _EM_INEXACT, _MCW_EM );
1643 #if defined( HAVE_BC5PLUS )
1644 _control87(MCW_EM, MCW_EM); /* defined in float.h */
1647 // FIXME: add other, more specific
1650 mainLoop(argc, argv);
1651 } catch (sg_throwable &t) {
1652 // We must use cerr rather than
1653 // logging, since logging may be
1655 cerr << "Fatal error: " << t.getFormattedMessage()
1656 << "\n (received from " << t.getOrigin() << ')' << endl;
1664 void fgLoadDCS(void) {
1666 ssgEntity *ship_obj = NULL;
1668 char obj_filename[25];
1670 for ( int k = 0; k < 32; k++ ) {
1674 SGPath tile_path( globals->get_fg_root());
1675 tile_path.append( "Scenery" );
1676 tile_path.append( "Objects.txt" );
1677 sg_gzifstream in( tile_path.str() );
1678 if ( ! in.is_open() ) {
1679 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << tile_path.str() );
1682 SGPath modelpath( globals->get_fg_root() );
1683 modelpath.append( "Models" );
1684 modelpath.append( "Geometry" );
1686 SGPath texturepath( globals->get_fg_root() );
1687 texturepath.append( "Models" );
1688 texturepath.append( "Textures" );
1690 ssgModelPath( (char *)modelpath.c_str() );
1691 ssgTexturePath( (char *)texturepath.c_str() );
1693 ship_sel = new ssgSelector;
1696 while ( ! in.eof() ) {
1698 if ( in.get( c ) && c == '#' ) {
1702 in >> obj_filename >> obj_lat[objc] >> obj_lon[objc] >> obj_alt[objc];
1703 /* cout << endl << obj_filename << " " << obj_lat[objc] << " " << obj_lon[objc] << " " << obj_alt[objc] << endl;
1704 int chj=getchar();*/
1706 obj_lon[objc] *=SGD_DEGREES_TO_RADIANS;
1707 obj_lat[objc] *=SGD_DEGREES_TO_RADIANS;
1709 ship_pos[objc] = new ssgTransform;
1711 // type "repeat" in objects.txt to load one more
1712 // instance of the last object.
1714 if ( strcmp(obj_filename,"repeat") != 0) {
1715 ship_obj = ssgLoad( obj_filename );
1718 if ( ship_obj != NULL ) {
1719 ship_obj->setName(obj_filename);
1721 ship_obj->clrTraversalMaskBits( SSGTRAV_HOT );
1723 ship_obj->setTraversalMaskBits( SSGTRAV_HOT );
1724 ship_pos[objc]->addKid( ship_obj ); // add object to transform node
1725 ship_sel->addKid( ship_pos[objc] ); // add transform node to selector
1726 SG_LOG( SG_TERRAIN, SG_ALERT, "Loaded file: "
1729 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: "
1733 // temporary hack for deck lights - ultimately should move to PLib (when??)
1734 //const char *extn = file_extension ( obj_filename ) ;
1736 ssgVertexArray *lights = new ssgVertexArray( 100 );
1737 ssgVertexArray *lightpoints = new ssgVertexArray( 100 );
1738 ssgVertexArray *lightnormals = new ssgVertexArray( 100 );
1739 ssgVertexArray *lightdir = new ssgVertexArray( 100 );
1740 int ltype[500], light_type;
1741 static int ltcount = 0;
1743 sgVec3 rway_dir,rway_normal,lightpt;
1745 modelpath.append(obj_filename);
1746 sg_gzifstream in1( modelpath.str() );
1747 if ( ! in1.is_open() ) {
1748 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << modelpath.str() );
1750 while ( ! in1.eof() ) {
1752 if ( in1.get( c ) && c == '#' ) {
1757 //cout << token << endl;
1758 if ( token == "runway" ) {
1760 sgSetVec3 (rway_dir, node[0], node[1], node[2] );
1761 } else if ( token == "edgelight" ) {
1763 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1765 } else if ( token == "taxi" ) {
1767 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1769 } else if ( token == "vasi" ) {
1771 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1773 } else if ( token == "threshold" ) {
1775 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1777 } else if ( token == "rabbit" ) {
1779 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1781 } else if ( token == "ols" ) {
1783 sgSetVec3 (rway_ols, node[0], node[1], node[2] );
1785 } else if ( token == "red" ) {
1787 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1789 } else if ( token == "green" ) {
1791 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1793 } else if ( token == "lp" ) {
1795 sgSetVec3 (lightpt, node[0], node[1], node[2] );
1796 lightpoints->add( lightpt );
1797 lightnormals->add( rway_normal );
1798 lightdir->add( rway_dir );
1799 ltype[ltcount]= light_type;
1802 if (in1.eof()) break;
1806 if ( lightpoints->getNum() ) {
1807 ssgBranch *lightpoints_branch;
1808 long int dummy = -999;
1809 dummy_tile = new FGTileEntry((SGBucket)dummy);
1810 dummy_tile->lightmaps_sequence = new ssgSelector;
1811 dummy_tile->ols_transform = new ssgTransform;
1813 // call function to generate the runway lights
1814 lightpoints_branch =
1815 dummy_tile->gen_runway_lights( lightpoints, lightnormals,
1817 lightpoints_brightness->addKid(lightpoints_branch);
1818 lightpoints_transform->addKid(lightpoints_brightness);
1819 //dummy_tile->lightmaps_sequence->setTraversalMaskBits( SSGTRAV_HOT );
1820 lightpoints_transform->addKid( dummy_tile->lightmaps_sequence );
1821 lightpoints_transform->ref();
1822 globals->get_gnd_lights_branch()->addKid( lightpoints_transform );
1826 // end hack for deck lights
1830 if (in.eof()) break;
1834 SG_LOG ( SG_TERRAIN, SG_ALERT, "Finished object processing." );
1836 globals->get_terrain_branch()->addKid( ship_sel ); //add selector node to root node
1843 void fgUpdateDCS (void) {
1845 // double eye_lat,eye_lon,eye_alt;
1846 // static double obj_head;
1847 double sl_radius,obj_latgc;
1848 // float nresultmat[4][4];
1849 // sgMat4 Trans,rothead,rotlon,rot180,rotlat,resultmat1,resultmat2,resultmat3;
1852 // Instantaneous Geodetic Lat/Lon/Alt of moving object
1853 FGADA *fdm = (FGADA *)current_aircraft.fdm_state;
1855 // Deck should be the first object in objects.txt in case of fdm=ada
1857 if (!strcmp(fgGetString("/sim/flight-model"), "ada")) {
1858 if ((fdm->get_iaux(1))==1)
1860 obj_lat[1] = fdm->get_daux(1)*SGD_DEGREES_TO_RADIANS;
1861 obj_lon[1] = fdm->get_daux(2)*SGD_DEGREES_TO_RADIANS;
1862 obj_alt[1] = fdm->get_daux(3);
1863 obj_pitch[1] = fdm->get_faux(1);
1864 obj_roll[1] = fdm->get_faux(2);
1868 for ( int m = 0; m < objc; m++ ) {
1869 //cout << endl << obj_lat[m]*SGD_RADIANS_TO_DEGREES << " " << obj_lon[m]*SGD_RADIANS_TO_DEGREES << " " << obj_alt[m] << " " << objc << endl;
1872 //Geodetic to Geocentric angles for rotation
1873 sgGeodToGeoc(obj_lat[m],obj_alt[m],&sl_radius,&obj_latgc);
1875 //moving object gbs-posn in cartesian coords
1876 Point3D obj_posn = Point3D( obj_lon[m],obj_lat[m],obj_alt[m]);
1877 Point3D obj_pos = sgGeodToCart( obj_posn );
1879 // Translate moving object w.r.t eye
1880 Point3D Objtrans = obj_pos-scenery.get_center();
1885 // rotate dynamic objects for lat,lon & alt and other motion about its axes
1888 sgMakeTransMat4( sgTRANS, bz[0],bz[1],bz[2]);
1890 sgVec3 ship_fwd,ship_rt,ship_up;
1891 sgSetVec3( ship_fwd, 1.0, 0.0, 0.0);//east,roll
1892 sgSetVec3( ship_rt, 0.0, 1.0, 0.0);//up,pitch
1893 sgSetVec3( ship_up, 0.0, 0.0, 1.0); //north,yaw
1895 sgMat4 sgROT_lon, sgROT_lat, sgROT_hdg, sgROT_pitch, sgROT_roll;
1896 sgMakeRotMat4( sgROT_lon, obj_lon[m]*SGD_RADIANS_TO_DEGREES, ship_up );
1897 sgMakeRotMat4( sgROT_lat, 90-obj_latgc*SGD_RADIANS_TO_DEGREES, ship_rt );
1898 sgMakeRotMat4( sgROT_hdg, 180.0, ship_up );
1899 sgMakeRotMat4( sgROT_pitch, obj_pitch[m], ship_rt );
1900 sgMakeRotMat4( sgROT_roll, obj_roll[m], ship_fwd );
1903 sgCopyMat4( sgTUX, sgROT_hdg );
1904 sgPostMultMat4( sgTUX, sgROT_pitch );
1905 sgPostMultMat4( sgTUX, sgROT_roll );
1906 sgPostMultMat4( sgTUX, sgROT_lat );
1907 sgPostMultMat4( sgTUX, sgROT_lon );
1908 sgPostMultMat4( sgTUX, sgTRANS );
1911 sgSetCoord(&shippos, sgTUX );
1912 ship_pos[m]->setTransform( &shippos );
1913 // temporary hack for deck lights - ultimately should move to PLib (when ??)
1915 if (lightpoints_transform) {
1916 lightpoints_transform->setTransform( &shippos );
1917 float sun_angle = cur_light_params.sun_angle * SGD_RADIANS_TO_DEGREES;
1918 if ( sun_angle > 89 ) {
1919 lightpoints_brightness->select(0x01);
1921 lightpoints_brightness->select(0x00);
1930 sgXformPnt3( rp, rway_ols, sgTUX );
1931 vp = globals->get_current_view()->get_view_pos();
1932 to[0] = rp[0]-vp[0];
1933 to[1] = rp[1]-vp[1];
1934 to[2] = rp[2]-vp[2];
1935 float dist = sgLengthVec3( to );
1936 alt = (current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER)-rway_ols[2];
1938 elev = asin(alt/dist)*SGD_RADIANS_TO_DEGREES;
1940 ref_elev = elev - 3.75; // +ve above, -ve below
1944 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1945 // if (ref_elev > 0.51) sel = 0x21;
1946 // if ((ref_elev <= 0.51) & (ref_elev > 0.17)) sel = 0x22;
1947 // if ((ref_elev <= 0.17) & (ref_elev >= -0.17)) sel = 0x24;
1948 // if ((ref_elev < -0.17) & (ref_elev >= -0.51)) sel = 0x28;
1949 // if (ref_elev < -0.51) sel = 0x30;
1950 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1951 dummy_tile->lightmaps_sequence->select(sel);
1954 sgCopyVec3 (up, ship_up);
1956 sgScaleVec3 (up, 4.0*ref_elev*dist/750.0);
1958 sgScaleVec3 (up, 4.0*ref_elev);
1959 dummy_tile->ols_transform->setTransform(up);
1960 //cout << "ref_elev " << ref_elev << endl;
1962 // end hack for deck lights
1965 if ( ship_sel != NULL ) {
1966 ship_sel->select(0xFFFFFFFE); // first object is ownship, added to acmodel
1970 // $$$ end - added VS Renganathan, 15 Oct 2K
1971 // added Venky , 12 Nov 2K