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 start_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 static long old_elapsed_ms = 0;
398 int dt_ms = int(globals->get_elapsed_time_ms() - old_elapsed_ms);
399 old_elapsed_ms = globals->get_elapsed_time_ms();
401 // Process/manage pending events
402 global_events.update( dt_ms );
404 static const SGPropertyNode *longitude
405 = fgGetNode("/position/longitude-deg");
406 static const SGPropertyNode *latitude
407 = fgGetNode("/position/latitude-deg");
408 static const SGPropertyNode *altitude
409 = fgGetNode("/position/altitude-ft");
410 static const SGPropertyNode *groundlevel_nearplane
411 = fgGetNode("/sim/current-view/ground-level-nearplane-m");
413 // Update the default (kludged) properties.
416 FGViewer *current__view = globals->get_current_view();
418 fgLIGHT *l = &cur_light_params;
419 static double last_visibility = -9999;
422 double actual_visibility = thesky->get_visibility();
423 if ( actual_visibility != last_visibility ) {
424 last_visibility = actual_visibility;
426 fog_exp_density = m_log01 / actual_visibility;
427 fog_exp2_density = sqrt_m_log01 / actual_visibility;
428 fog_exp2_punch_through = sqrt_m_log01 / ( actual_visibility * 2.5 );
432 // GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
433 // GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
434 // GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
435 // GLfloat mat_shininess[] = { 10.0 };
436 GLbitfield clear_mask;
438 if ( idle_state != 1000 ) {
439 // still initializing, draw the splash screen
440 if ( fgGetBool("/sim/startup/splash-screen") ) {
443 start_time_stamp.stamp(); // Keep resetting the start time
445 // idle_state is now 1000 meaning we've finished all our
446 // initializations and are running the main loop, so this will
447 // now work without seg faulting the system.
449 // Update the elapsed time.
450 current_time_stamp.stamp();
451 globals->set_elapsed_time_ms( (current_time_stamp - start_time_stamp)
454 // calculate our current position in cartesian space
455 scenery.set_center( scenery.get_next_center() );
458 fgReshape( fgGetInt("/sim/startup/xsize"),
459 fgGetInt("/sim/startup/ysize") );
461 // set the sun position
462 glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
464 clear_mask = GL_DEPTH_BUFFER_BIT;
465 if ( fgGetBool("/sim/rendering/wireframe") ) {
466 clear_mask |= GL_COLOR_BUFFER_BIT;
469 if ( fgGetBool("/sim/rendering/skyblend") ) {
470 if ( fgGetBool("/sim/rendering/textures") ) {
471 // glClearColor(black[0], black[1], black[2], black[3]);
472 glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
473 l->adj_fog_color[2], l->adj_fog_color[3]);
474 clear_mask |= GL_COLOR_BUFFER_BIT;
477 glClearColor(l->sky_color[0], l->sky_color[1],
478 l->sky_color[2], l->sky_color[3]);
479 clear_mask |= GL_COLOR_BUFFER_BIT;
481 glClear( clear_mask );
483 // Tell GL we are switching to model view parameters
485 // I really should create a derived ssg node or use a call
486 // back or something so that I can draw the sky within the
487 // ssgCullAndDraw() function, but for now I just mimic what
488 // ssg does to set up the model view matrix
489 glMatrixMode(GL_MODELVIEW);
491 ssgSetCamera( (sgVec4 *)current__view->get_VIEW() );
493 // set the opengl state to known default values
494 default_state->force();
496 // update fog params if visibility has changed
497 double visibility_meters = fgGetDouble("/environment/visibility-m");
498 thesky->set_visibility(visibility_meters);
500 thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
501 ( global_multi_loop * fgGetInt("/sim/speed-up") )
502 / (double)fgGetInt("/sim/model-hz") );
504 // Set correct opengl fog density
505 glFogf (GL_FOG_DENSITY, fog_exp2_density);
507 // update the sky dome
508 if ( fgGetBool("/sim/rendering/skyblend") ) {
509 /* cout << "thesky->repaint() sky_color = "
510 << cur_light_params.sky_color[0] << " "
511 << cur_light_params.sky_color[1] << " "
512 << cur_light_params.sky_color[2] << " "
513 << cur_light_params.sky_color[3] << endl;
515 << cur_light_params.fog_color[0] << " "
516 << cur_light_params.fog_color[1] << " "
517 << cur_light_params.fog_color[2] << " "
518 << cur_light_params.fog_color[3] << endl;
519 cout << " sun_angle = " << cur_light_params.sun_angle
520 << " moon_angle = " << cur_light_params.moon_angle
522 thesky->repaint( cur_light_params.sky_color,
523 cur_light_params.adj_fog_color,
524 cur_light_params.sun_angle,
525 cur_light_params.moon_angle,
526 globals->get_ephem()->getNumPlanets(),
527 globals->get_ephem()->getPlanets(),
528 globals->get_ephem()->getNumStars(),
529 globals->get_ephem()->getStars() );
531 /* cout << "thesky->reposition( view_pos = " << view_pos[0] << " "
532 << view_pos[1] << " " << view_pos[2] << endl;
533 cout << " zero_elev = " << zero_elev[0] << " "
534 << zero_elev[1] << " " << zero_elev[2]
535 << " lon = " << cur_fdm_state->get_Longitude()
536 << " lat = " << cur_fdm_state->get_Latitude() << endl;
537 cout << " sun_rot = " << cur_light_params.sun_rotation
538 << " gst = " << SGTime::cur_time_params->getGst() << endl;
539 cout << " sun ra = " << globals->get_ephem()->getSunRightAscension()
540 << " sun dec = " << globals->get_ephem()->getSunDeclination()
541 << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
542 << " moon dec = " << globals->get_ephem()->getMoonDeclination() << endl; */
544 thesky->reposition( current__view->get_view_pos(),
545 current__view->get_zero_elev(),
546 current__view->get_world_up(),
547 longitude->getDoubleValue()
548 * SGD_DEGREES_TO_RADIANS,
549 latitude->getDoubleValue()
550 * SGD_DEGREES_TO_RADIANS,
551 altitude->getDoubleValue() * SG_FEET_TO_METER,
552 cur_light_params.sun_rotation,
553 globals->get_time_params()->getGst(),
554 globals->get_ephem()->getSunRightAscension(),
555 globals->get_ephem()->getSunDeclination(),
557 globals->get_ephem()->getMoonRightAscension(),
558 globals->get_ephem()->getMoonDeclination(),
562 glEnable( GL_DEPTH_TEST );
563 if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
565 glFogi( GL_FOG_MODE, GL_EXP2 );
566 glFogfv( GL_FOG_COLOR, l->adj_fog_color );
569 // set sun/lighting parameters
570 ssgGetLight( 0 ) -> setPosition( l->sun_vec );
572 // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
573 // we only update GL_AMBIENT for our lights we will never get
574 // a completely dark scene. So, we set GL_LIGHT_MODEL_AMBIENT
575 // explicitely to black.
576 GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
577 GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
578 glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
580 ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
581 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
582 // ssgGetLight( 0 ) -> setColour( GL_SPECULAR, l->scene_white );
584 // texture parameters
585 // glEnable( GL_TEXTURE_2D );
586 glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
587 glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
589 // glMatrixMode( GL_PROJECTION );
591 ssgSetFOV( current__view->get_h_fov(),
592 current__view->get_v_fov() );
594 double agl = current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER
595 - scenery.get_cur_elev();
598 scene_nearplane = 10.0f;
599 scene_farplane = 120000.0f;
601 scene_nearplane = groundlevel_nearplane->getDoubleValue();
602 scene_farplane = 120000.0f;
605 ssgSetNearFar( scene_nearplane, scene_farplane );
607 // $$$ begin - added VS Renganthan 17 Oct 2K
610 // $$$ end - added VS Renganthan 17 Oct 2K
612 # ifdef FG_NETWORK_OLK
613 if ( fgGetBool("/sim/networking/network-olk") ) {
615 other = head->next; /* put listpointer to start */
616 while ( other != tail) { /* display all except myself */
617 if ( strcmp( other->ipadr, fgd_mcp_ip) != 0) {
618 other->fgd_sel->select(1);
619 sgSetCoord( &fgdpos, other->sgFGD_COORD );
620 other->fgd_pos->setTransform( &fgdpos );
625 // fgd_sel->select(1);
626 // sgCopyMat4( sgTUX, current_view.sgVIEW);
628 // sgSetCoord( &fgdpos, sgFGD_VIEW );
629 // fgd_pos->setTransform( &fgdpos);
633 // position tile nodes and update range selectors
634 global_tile_mgr.prep_ssg_nodes(visibility_meters);
636 if ( fgGetBool("/sim/rendering/skyblend") ) {
637 // draw the sky backdrop
639 // we need a white diffuse light for the phase of the moon
640 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
644 // return to the desired diffuse color
645 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
648 // draw the ssg scene
649 glEnable( GL_DEPTH_TEST );
651 ssgSetNearFar( scene_nearplane, scene_farplane );
652 ssgCullAndDraw( globals->get_scene_graph() );
654 // change state for lighting here
657 // Set punch through fog density
658 glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
660 #ifdef FG_EXPERIMENTAL_LIGHTING
661 // Enable states for drawing points with GL_extension
662 if (glutExtensionSupported("GL_EXT_point_parameters")) {
663 glEnable(GL_POINT_SMOOTH);
664 float quadratic[3] = {1.0, 0.01, 0.0001};
665 // get the address of our OpenGL extensions
667 glPointParameterfEXT = (PFNGLPOINTPARAMETERFEXTPROC)
668 wglGetProcAddress("glPointParameterfEXT");
669 glPointParameterfvEXT = (PFNGLPOINTPARAMETERFVEXTPROC)
670 wglGetProcAddress("glPointParameterfvEXT");
672 // makes the points fade as they move away
673 glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT, quadratic);
674 glPointParameterfEXT(GL_POINT_SIZE_MIN_EXT, 1.0);
677 // Enable states for drawing runway lights with spherical mapping
678 glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
679 glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
680 glEnable(GL_TEXTURE_GEN_S);
681 glEnable(GL_TEXTURE_GEN_T);
683 //Maybe this is not the best way, but it works !!
684 glPolygonMode(GL_FRONT, GL_POINT);
686 glEnable(GL_CULL_FACE);
689 glDisable( GL_LIGHTING );
690 // blending function for runway lights
691 glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) ;
695 ssgSetNearFar( scene_nearplane, scene_farplane );
696 ssgCullAndDraw( lighting );
699 #ifdef FG_EXPERIMENTAL_LIGHTING
700 if (glutExtensionSupported("GL_EXT_point_parameters")) {
701 // Disable states used for runway lighting
702 glPolygonMode(GL_FRONT, GL_FILL);
704 glDisable(GL_TEXTURE_GEN_S);
705 glDisable(GL_TEXTURE_GEN_T);
706 glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT,
707 default_attenuation);
713 if ( fgGetBool("/sim/rendering/skyblend") ) {
714 // draw the sky cloud layers
715 thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
718 globals->get_model_mgr()->draw();
719 globals->get_aircraft_model()->draw();
721 // display HUD && Panel
723 glDisable( GL_DEPTH_TEST );
724 // glDisable( GL_CULL_FACE );
725 // glDisable( GL_TEXTURE_2D );
727 // update the input subsystem
728 current_input.update(dt_ms);
730 // update the controls subsystem
731 globals->get_controls()->update(dt_ms);
733 hud_and_panel->apply();
736 // Use the hud_and_panel ssgSimpleState for rendering the ATC output
737 // This only works properly if called before the panel call
738 globals->get_ATC_display()->update(dt_ms);
740 // update the panel subsystem
741 if ( current_panel != NULL ) {
742 current_panel->update(dt_ms);
745 // We can do translucent menus, so why not. :-)
747 glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
749 // glDisable ( GL_BLEND ) ;
751 // glEnable( GL_FOG );
753 globals->get_logger()->update(dt_ms);
760 // Update internal time dependent calculations (i.e. flight model)
761 void fgUpdateTimeDepCalcs() {
762 static bool inited = false;
763 static const SGPropertyNode *master_freeze
764 = fgGetNode("/sim/freeze/master");
766 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
768 fgLIGHT *l = &cur_light_params;
773 // Initialize the FDM here if it hasn't been and if we have a
774 // scenery elevation hit.
776 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
777 // << " cur_elev = " << scenery.get_cur_elev() << endl;
779 if ( !cur_fdm_state->get_inited() && scenery.get_cur_elev() > -9990 ) {
780 SG_LOG(SG_FLIGHT,SG_INFO, "Finally initializing fdm");
782 cur_fdm_state->init();
783 if ( cur_fdm_state->get_bound() ) {
784 cur_fdm_state->unbind();
786 cur_fdm_state->bind();
789 // conceptually, the following block could be done for each fdm
791 if ( !cur_fdm_state->get_inited() ) {
792 // do nothing, fdm isn't inited yet
793 } else if ( master_freeze->getBoolValue() ) {
794 // we are frozen, run the fdm's with 0 time slices in case
795 // they want to do something with that.
797 cur_fdm_state->update( 0 );
798 FGSteam::update( 0 );
800 // we have been inited, and we are not frozen, we are good to go ...
803 cur_fdm_state->stamp();
809 long elapsed = current - cur_fdm_state->get_time_stamp();
810 cur_fdm_state->set_time_stamp( current );
811 elapsed += cur_fdm_state->get_remainder();
812 // cout << "elapsed = " << elapsed << endl;
813 // cout << "dt = " << cur_fdm_state->get_delta_t() << endl;
814 multi_loop = (long)(((double)elapsed * 0.000001) /
815 cur_fdm_state->get_delta_t() );
816 cur_fdm_state->set_multi_loop( multi_loop );
817 long remainder = elapsed - (long)( (multi_loop*1000000) *
818 cur_fdm_state->get_delta_t() );
819 cur_fdm_state->set_remainder( remainder );
820 // cout << "remainder = " << remainder << endl;
822 // chop max interations to something reasonable if the sim was
823 // delayed for an excesive amount of time
824 if ( multi_loop > 2.0 / cur_fdm_state->get_delta_t() ) {
825 multi_loop = (int)(2.0 / cur_fdm_state->get_delta_t());
826 cur_fdm_state->set_remainder( 0 );
829 // cout << "multi_loop = " << multi_loop << endl;
830 for ( i = 0; i < multi_loop * fgGetInt("/sim/speed-up"); ++i ) {
831 // run Autopilot system
832 globals->get_autopilot()->update(0); // FIXME: use real dt
835 cur_fdm_state->update( 1 );
837 FGSteam::update( multi_loop * fgGetInt("/sim/speed-up") );
840 if ( !strcmp(fgGetString("/sim/view-mode"), "pilot") ) {
841 cur_view_fdm = *cur_fdm_state;
846 globals->get_model_mgr()->update(multi_loop);
847 globals->get_aircraft_model()->update(multi_loop);
849 // update the view angle
850 globals->get_viewmgr()->update(multi_loop);
854 // Update solar system
855 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
856 globals->get_time_params()->getLst(),
857 cur_fdm_state->get_Latitude() );
859 // Update radio stack model
860 current_radiostack->update(multi_loop);
864 void fgInitTimeDepCalcs( void ) {
869 static const double alt_adjust_ft = 3.758099;
870 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
873 // What should we do when we have nothing else to do? Let's get ready
874 // for the next move and update the display?
875 static void fgMainLoop( void ) {
876 static const SGPropertyNode *longitude
877 = fgGetNode("/position/longitude-deg");
878 static const SGPropertyNode *latitude
879 = fgGetNode("/position/latitude-deg");
880 static const SGPropertyNode *altitude
881 = fgGetNode("/position/altitude-ft");
882 static const SGPropertyNode *clock_freeze
883 = fgGetNode("/sim/freeze/clock", true);
884 static const SGPropertyNode *cur_time_override
885 = fgGetNode("/sim/time/cur-time-override", true);
887 static long remainder = 0;
889 #ifdef FANCY_FRAME_COUNTER
893 static time_t last_time = 0;
894 static int frames = 0;
895 #endif // FANCY_FRAME_COUNTER
897 SGTime *t = globals->get_time_params();
899 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
900 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
902 #ifdef FG_NETWORK_OLK
903 if ( fgGetBool("/sim/networking/network-olk") ) {
904 if ( net_is_registered == 0 ) { // We first have to reg. to fgd
905 // printf("FGD: Netupdate\n");
906 fgd_send_com( "A", FGFS_host); // Send Mat4 data
907 fgd_send_com( "B", FGFS_host); // Recv Mat4 data
912 #if defined( ENABLE_PLIB_JOYSTICK )
913 // Read joystick and update control settings
914 // if ( fgGetString("/sim/control-mode") == "joystick" )
918 #elif defined( ENABLE_GLUT_JOYSTICK )
919 // Glut joystick support works by feeding a joystick handler
920 // function to glut. This is taken care of once in the joystick
921 // init routine and we don't have to worry about it again.
924 #ifdef FG_NEW_ENVIRONMENT
925 globals->get_environment_mgr()->update(0); // FIXME: use real delta time
928 // Fix elevation. I'm just sticking this here for now, it should
929 // probably move eventually
931 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
932 scenery.get_cur_elev(),
933 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
934 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
936 if ( scenery.get_cur_elev() > -9990 && cur_fdm_state->get_inited() ) {
937 if ( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER <
938 (scenery.get_cur_elev() + alt_adjust_m - 3.0) ) {
939 // now set aircraft altitude above ground
940 printf("(*) Current Altitude = %.2f < %.2f forcing to %.2f\n",
941 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
942 scenery.get_cur_elev() + alt_adjust_m - 3.0,
943 scenery.get_cur_elev() + alt_adjust_m );
944 cur_fdm_state->set_Altitude( scenery.get_cur_elev()
947 SG_LOG( SG_ALL, SG_DEBUG,
948 "<*> resetting altitude to "
949 << cur_fdm_state->get_Altitude() * SG_FEET_TO_METER
954 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
955 scenery.get_cur_elev(),
956 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
957 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
959 // cout << "Warp = " << globals->get_warp() << endl;
962 static bool last_clock_freeze = false;
964 if ( clock_freeze->getBoolValue() ) {
965 // clock freeze requested
966 if ( cur_time_override->getLongValue() == 0 ) {
967 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
968 globals->set_warp( 0 );
971 // no clock freeze requested
972 if ( last_clock_freeze == true ) {
973 // clock just unfroze, let's set warp as the difference
974 // between frozen time and current time so we don't get a
975 // time jump (and corresponding sky object and lighting
977 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
978 fgSetLong( "/sim/time/cur-time-override", 0 );
980 if ( globals->get_warp_delta() != 0 ) {
981 globals->inc_warp( globals->get_warp_delta() );
985 last_clock_freeze = clock_freeze->getBoolValue();
987 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
988 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
989 cur_time_override->getLongValue(),
990 globals->get_warp() );
992 if ( globals->get_warp_delta() != 0 ) {
993 fgUpdateSkyAndLightingParams();
996 // update magvar model
997 globals->get_mag()->update( longitude->getDoubleValue()
998 * SGD_DEGREES_TO_RADIANS,
999 latitude->getDoubleValue()
1000 * SGD_DEGREES_TO_RADIANS,
1001 altitude->getDoubleValue() * SG_FEET_TO_METER,
1002 globals->get_time_params()->getJD() );
1004 // Get elapsed time (in usec) for this past frame
1005 elapsed = fgGetTimeInterval();
1006 SG_LOG( SG_ALL, SG_DEBUG,
1007 "Elapsed time interval is = " << elapsed
1008 << ", previous remainder is = " << remainder );
1010 // Calculate frame rate average
1011 #ifdef FANCY_FRAME_COUNTER
1012 /* old fps calculation */
1013 if ( elapsed > 0 ) {
1016 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
1017 tmp = general.get_frame(i);
1019 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
1020 general.set_frame(i+1,tmp);
1022 tmp = 1000000.0 / (float)elapsed;
1023 general.set_frame(0,tmp);
1024 // printf("frame[0] = %.2f\n", general.frames[0]);
1026 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
1027 // printf("ave = %.2f\n", general.frame_rate);
1030 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
1031 general.set_frame_rate( frames );
1032 SG_LOG( SG_ALL, SG_DEBUG,
1033 "--> Frame rate is = " << general.get_frame_rate() );
1036 last_time = t->get_cur_time();
1040 // Run ATC subsystem
1041 globals->get_ATC_mgr()->update(1); // FIXME - use real dt.
1043 // Run the AI subsystem
1044 globals->get_AI_mgr()->update(1); // FIXME - use real dt.
1048 // Calculate model iterations needed for next frame
1049 elapsed += remainder;
1051 global_multi_loop = (long)(((double)elapsed * 0.000001) *
1052 fgGetInt("/sim/model-hz"));
1053 remainder = elapsed - ( (global_multi_loop*1000000) /
1054 fgGetInt("/sim/model-hz") );
1055 SG_LOG( SG_ALL, SG_DEBUG,
1056 "Model iterations needed = " << global_multi_loop
1057 << ", new remainder = " << remainder );
1059 // chop max interations to something reasonable if the sim was
1060 // delayed for an excesive amount of time
1061 if ( global_multi_loop > 2.0 * fgGetInt("/sim/model-hz") ) {
1062 global_multi_loop = (int)(2.0 * fgGetInt("/sim/model-hz") );
1067 if ( global_multi_loop > 0 ) {
1068 fgUpdateTimeDepCalcs();
1070 SG_LOG( SG_ALL, SG_DEBUG,
1071 "Elapsed time is zero ... we're zinging" );
1074 #if ! defined( macintosh )
1075 // Do any I/O channel work that might need to be done
1079 // see if we need to load any deferred-load textures
1080 material_lib.load_next_deferred();
1082 // Run audio scheduler
1083 #ifdef ENABLE_AUDIO_SUPPORT
1084 if ( fgGetBool("/sim/sound/audible")
1085 && globals->get_soundmgr()->is_working() ) {
1086 globals->get_fx()->update(1); // FIXME: use dt
1087 globals->get_soundmgr()->update(1); // FIXME: use dt
1094 // see if we need to load any new scenery tiles
1095 double visibility_meters = fgGetDouble("/environment/visibility-m");
1096 global_tile_mgr.update( longitude->getDoubleValue(),
1097 latitude->getDoubleValue(), visibility_meters );
1099 SG_LOG( SG_ALL, SG_DEBUG, "" );
1103 // This is the top level master main function that is registered as
1104 // our idle funciton
1106 // The first few passes take care of initialization things (a couple
1107 // per pass) and once everything has been initialized fgMainLoop from
1110 static void fgIdleFunction ( void ) {
1111 // printf("idle state == %d\n", idle_state);
1113 if ( idle_state == 0 ) {
1114 // Initialize the splash screen right away
1115 if ( fgGetBool("/sim/startup/splash-screen") ) {
1120 } else if ( idle_state == 1 ) {
1121 // Initialize audio support
1122 #ifdef ENABLE_AUDIO_SUPPORT
1124 // Start the intro music
1125 if ( fgGetBool("/sim/startup/intro-music") ) {
1126 SGPath mp3file( globals->get_fg_root() );
1127 mp3file.append( "Sounds/intro.mp3" );
1129 SG_LOG( SG_GENERAL, SG_INFO,
1130 "Starting intro music: " << mp3file.str() );
1132 #if defined( __CYGWIN__ )
1133 string command = "start /m `cygpath -w " + mp3file.str() + "`";
1134 #elif defined( WIN32 )
1135 string command = "start /m " + mp3file.str();
1137 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
1140 system ( command.c_str() );
1143 // This is an 'easter egg' which is kind of a hard thing to
1144 // hide in an open source project -- so I won't try very hard
1145 // to hide it. If you are looking at this now, please, you
1146 // don't want to ruin the surprise. :-) Just forget about it
1147 // and don't look any further; unless it is causing an actual
1148 // problem for you, which it shouldn't, and I hope it doesn't!
1150 if ( globals->get_time_params()->getGmt()->tm_mon == 4
1151 && globals->get_time_params()->getGmt()->tm_mday == 19 )
1153 string url = "http://www.flightgear.org/Music/invasion.mp3";
1154 #if defined( __CYGWIN__ ) || defined( WIN32 )
1155 string command = "start /m " + url;
1157 string command = "mpg123 " + url + "> /dev/null 2>&1";
1159 system( command.c_str() );
1165 } else if ( idle_state == 2 ) {
1166 // These are a few miscellaneous things that aren't really
1167 // "subsystems" but still need to be initialized.
1170 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
1171 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
1176 } else if ( idle_state == 3 ) {
1177 // This is the top level init routine which calls all the
1178 // other subsystem initialization routines. If you are adding
1179 // a subsystem to flightgear, its initialization call should
1180 // located in this routine.
1181 if( !fgInitSubsystems()) {
1182 SG_LOG( SG_GENERAL, SG_ALERT,
1183 "Subsystem initializations failed ..." );
1188 } else if ( idle_state == 4 ) {
1189 // setup OpenGL view parameters
1193 } else if ( idle_state == 5 ) {
1196 } else if ( idle_state == 6 ) {
1200 cout << "Panel visible = " << fgPanelVisible() << endl;
1201 fgReshape( fgGetInt("/sim/startup/xsize"),
1202 fgGetInt("/sim/startup/ysize") );
1205 if ( idle_state == 1000 ) {
1206 // We've finished all our initialization steps, from now on we
1207 // run the main loop.
1209 glutIdleFunc(fgMainLoop);
1211 if ( fgGetBool("/sim/startup/splash-screen") ) {
1212 fgSplashUpdate(0.0);
1217 // options.cxx needs to see this for toggle_panel()
1218 // Handle new window size or exposure
1219 void fgReshape( int width, int height ) {
1222 if ( (!fgGetBool("/sim/virtual-cockpit"))
1223 && fgPanelVisible() && idle_state == 1000 ) {
1224 view_h = (int)(height * (current_panel->getViewHeight() -
1225 current_panel->getYOffset()) / 768.0);
1231 FGViewMgr *viewmgr = globals->get_viewmgr();
1232 for ( int i = 0; i < viewmgr->size(); ++i ) {
1233 viewmgr->get_view(i)->
1234 set_aspect_ratio((float)view_h / (float)width);
1237 glViewport( 0, (GLint)(height - view_h), (GLint)(width), (GLint)(view_h) );
1239 fgSetInt("/sim/startup/xsize", width);
1240 fgSetInt("/sim/startup/ysize", height);
1241 guiInitMouse(width, height);
1243 ssgSetFOV( viewmgr->get_current_view()->get_h_fov(),
1244 viewmgr->get_current_view()->get_v_fov() );
1249 // Initialize GLUT and define a main window
1250 int fgGlutInit( int *argc, char **argv ) {
1252 #if !defined( macintosh )
1253 // GLUT will extract all glut specific options so later on we only
1254 // need wory about our own.
1255 glutInit(argc, argv);
1258 // Define Display Parameters
1259 glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
1261 SG_LOG( SG_GENERAL, SG_INFO, "Opening a window: " <<
1262 fgGetInt("/sim/startup/xsize") << "x"
1263 << fgGetInt("/sim/startup/ysize") );
1265 // Define initial window size
1266 glutInitWindowSize( fgGetInt("/sim/startup/xsize"),
1267 fgGetInt("/sim/startup/ysize") );
1269 // Initialize windows
1270 if ( !fgGetBool("/sim/startup/game-mode")) {
1271 // Open the regular window
1272 glutCreateWindow("FlightGear");
1273 #ifndef GLUT_WRONG_VERSION
1275 // Open the cool new 'game mode' window
1276 char game_mode_str[256];
1277 //#define SYNC_OPENGL_WITH_DESKTOP_SETTINGS
1278 #if defined(WIN32) && defined(SYNC_OPENGL_WITH_DESKTOP_SETTINGS)
1279 #ifndef ENUM_CURRENT_SETTINGS
1280 #define ENUM_CURRENT_SETTINGS ((DWORD)-1)
1281 #define ENUM_REGISTRY_SETTINGS ((DWORD)-2)
1285 dm.dmSize = sizeof(DEVMODE);
1286 EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &dm);
1287 fgSetInt("/sim/startup/xsize", dm.dmPelsWidth);
1288 fgSetInt("/sim/startup/ysize", dm.dmPelsHeight);
1289 glutInitWindowSize( fgGetInt("/sim/startup/xsize"),
1290 fgGetInt("/sim/startup/ysize") );
1291 sprintf( game_mode_str, "%dx%d:%d@%d",
1295 dm.dmDisplayFrequency );
1297 // Open the cool new 'game mode' window
1298 sprintf( game_mode_str, "width=%d height=%d bpp=%d",
1299 fgGetInt("/sim/startup/xsize"),
1300 fgGetInt("/sim/startup/ysize"),
1301 fgGetInt("/sim/rendering/bits-per-pixel"));
1303 #endif // HAVE_WINDOWS_H
1304 SG_LOG( SG_GENERAL, SG_INFO,
1305 "game mode params = " << game_mode_str );
1306 glutGameModeString( game_mode_str );
1307 glutEnterGameMode();
1308 #endif // GLUT_WRONG_VERSION
1311 // This seems to be the absolute earliest in the init sequence
1312 // that these calls will return valid info. Too bad it's after
1313 // we've already created and sized out window. :-(
1314 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
1315 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
1316 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
1317 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
1320 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
1321 general.set_glMaxTexSize( tmp );
1322 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
1324 glGetIntegerv( GL_DEPTH_BITS, &tmp );
1325 general.set_glDepthBits( tmp );
1326 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
1332 // Initialize GLUT event handlers
1333 int fgGlutInitEvents( void ) {
1334 // call fgReshape() on window resizes
1335 glutReshapeFunc( fgReshape );
1337 // keyboard and mouse callbacks are set in FGInput::init
1340 // call guiMouseFunc() whenever our little rodent is used
1341 glutMouseFunc ( guiMouseFunc );
1342 glutMotionFunc (guiMotionFunc );
1343 glutPassiveMotionFunc (guiMotionFunc );
1346 // call fgMainLoop() whenever there is
1347 // nothing else to do
1348 glutIdleFunc( fgIdleFunction );
1351 glutDisplayFunc( fgRenderFrame );
1358 int mainLoop( int argc, char **argv ) {
1360 #if defined( macintosh )
1361 freopen ("stdout.txt", "w", stdout );
1362 freopen ("stderr.txt", "w", stderr );
1363 argc = ccommand( &argv );
1366 // set default log levels
1367 sglog().setLogLevels( SG_ALL, SG_INFO );
1370 #ifdef FLIGHTGEAR_VERSION
1371 version = FLIGHTGEAR_VERSION;
1373 version = "unknown version";
1375 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
1376 << version << endl );
1378 // Allocate global data structures. This needs to happen before
1379 // we parse command line options
1381 globals = new FGGlobals;
1383 #if defined(FG_NEW_ENVIRONMENT)
1384 globals->set_environment_mgr(new FGEnvironmentMgr);
1387 // seed the random number generater
1390 SGRoute *route = new SGRoute;
1391 globals->set_route( route );
1393 FGControls *controls = new FGControls;
1394 globals->set_controls( controls );
1396 string_list *col = new string_list;
1397 globals->set_channel_options_list( col );
1399 // Scan the config file(s) and command line options to see if
1400 // fg_root was specified (ignore all other options for now)
1401 fgInitFGRoot(argc, argv);
1403 // Check for the correct base package version
1404 string base_version = fgBasePackageVersion();
1405 if ( !(base_version == "0.7.9") ) {
1406 // tell the operator how to use this application
1409 SG_LOG( SG_GENERAL, SG_ALERT, "Base package check failed ... "
1410 << "Found version " << base_version << " at: "
1411 << globals->get_fg_root() );
1412 SG_LOG( SG_GENERAL, SG_ALERT, "Please upgrade to version 0.7.9" );
1416 // Initialize the Aircraft directory to "" (UIUC)
1419 // Load the configuration parameters
1420 if ( !fgInitConfig(argc, argv) ) {
1421 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
1425 // Initialize the Window/Graphics environment.
1426 if( !fgGlutInit(&argc, argv) ) {
1427 SG_LOG( SG_GENERAL, SG_ALERT, "GLUT initialization failed ..." );
1431 // Initialize the various GLUT Event Handlers.
1432 if( !fgGlutInitEvents() ) {
1433 SG_LOG( SG_GENERAL, SG_ALERT,
1434 "GLUT event handler initialization failed ..." );
1438 // Initialize plib net interface
1439 netInit( &argc, argv );
1441 // Initialize ssg (from plib). Needs to come before we do any
1442 // other ssg stuff, but after opengl/glut has been initialized.
1445 // Initialize the user interface (we need to do this before
1446 // passing off control to glut and before fgInitGeneral to get our
1450 #ifdef GL_EXT_texture_lod_bias
1451 glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, -0.5 ) ;
1454 // Set position relative to glide slope if requested
1455 fgSetPosFromGlideSlope();
1457 // set current_options lon/lat if an airport id is specified
1458 // cout << "3. airport_id = " << fgGetString("/sim/startup/airport-id") << endl;
1459 if ( fgGetString("/sim/startup/airport-id")[0] != '\0' ) {
1460 // fgSetPosFromAirportID( fgGetString("/sim/startup/airport-id") );
1461 fgSetPosFromAirportIDandHdg( fgGetString("/sim/startup/airport-id"),
1462 fgGetDouble("/orientation/heading-deg") );
1463 // set tower position (a little off the heading for single runway airports)
1464 fgSetTowerPosFromAirportID( fgGetString("/sim/startup/airport-id"), fgGetDouble("orientation/heading") );
1467 SGTime *t = fgInitTime();
1468 globals->set_time_params( t );
1470 // Do some quick general initializations
1471 if( !fgInitGeneral()) {
1472 SG_LOG( SG_GENERAL, SG_ALERT,
1473 "General initializations failed ..." );
1477 SGPath modelpath( globals->get_fg_root() );
1478 ssgModelPath( (char *)modelpath.c_str() );
1481 globals->set_scene_graph(new ssgRoot);
1482 globals->get_scene_graph()->setName( "Scene" );
1484 lighting = new ssgRoot;
1485 lighting->setName( "Lighting" );
1488 globals->set_terrain_branch(new ssgBranch);
1489 globals->get_terrain_branch()->setName( "Terrain" );
1490 globals->get_scene_graph()->addKid( globals->get_terrain_branch() );
1492 globals->set_models_branch(new ssgBranch);
1493 globals->get_models_branch()->setName( "Models" );
1494 globals->get_scene_graph()->addKid( globals->get_models_branch() );
1496 globals->set_aircraft_branch(new ssgBranch);
1497 globals->get_aircraft_branch()->setName( "Aircraft" );
1498 globals->get_scene_graph()->addKid( globals->get_aircraft_branch() );
1501 globals->set_gnd_lights_branch(new ssgBranch);
1502 globals->get_gnd_lights_branch()->setName( "Ground Lighting" );
1503 lighting->addKid( globals->get_gnd_lights_branch() );
1505 globals->set_rwy_lights_branch(new ssgBranch);
1506 globals->get_rwy_lights_branch()->setName( "Runway Lighting" );
1507 lighting->addKid( globals->get_rwy_lights_branch() );
1509 ////////////////////////////////////////////////////////////////////
1510 // Initialize the general model subsystem.
1511 ////////////////////////////////////////////////////////////////////
1513 globals->set_model_mgr(new FGModelMgr);
1514 globals->get_model_mgr()->init();
1515 globals->get_model_mgr()->bind();
1517 ////////////////////////////////////////////////////////////////////
1518 // Initialize the 3D aircraft model subsystem.
1519 ////////////////////////////////////////////////////////////////////
1521 globals->set_aircraft_model(new FGAircraftModel);
1522 globals->get_aircraft_model()->init();
1523 globals->get_aircraft_model()->bind();
1525 ////////////////////////////////////////////////////////////////////
1526 // Initialize the view manager subsystem.
1527 ////////////////////////////////////////////////////////////////////
1529 FGViewMgr *viewmgr = new FGViewMgr;
1530 globals->set_viewmgr( viewmgr );
1535 // Initialize the sky
1536 SGPath ephem_data_path( globals->get_fg_root() );
1537 ephem_data_path.append( "Astro" );
1538 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
1539 ephem->update( globals->get_time_params()->getMjd(),
1540 globals->get_time_params()->getLst(),
1542 globals->set_ephem( ephem );
1546 SGPath sky_tex_path( globals->get_fg_root() );
1547 sky_tex_path.append( "Textures" );
1548 sky_tex_path.append( "Sky" );
1549 thesky->texture_path( sky_tex_path.str() );
1551 thesky->build( 550.0, 550.0,
1552 globals->get_ephem()->getNumPlanets(),
1553 globals->get_ephem()->getPlanets(), 60000.0,
1554 globals->get_ephem()->getNumStars(),
1555 globals->get_ephem()->getStars(), 60000.0 );
1557 if ( fgGetBool("/environment/clouds/status") ) {
1558 // thesky->add_cloud_layer( 2000.0, 200.0, 50.0, 40000.0,
1559 // SG_CLOUD_OVERCAST );
1560 thesky->add_cloud_layer( fgGetDouble("/environment/clouds/altitude-ft") *
1562 200.0, 50.0, 40000.0,
1563 SG_CLOUD_MOSTLY_CLOUDY );
1564 // thesky->add_cloud_layer( 3000.0, 200.0, 50.0, 40000.0,
1565 // SG_CLOUD_MOSTLY_SUNNY );
1566 thesky->add_cloud_layer( 6000.0, 20.0, 10.0, 40000.0,
1570 // Initialize MagVar model
1571 SGMagVar *magvar = new SGMagVar();
1572 globals->set_mag( magvar );
1574 // airport = new ssgBranch;
1575 // airport->setName( "Airport Lighting" );
1576 // lighting->addKid( airport );
1582 #ifdef FG_NETWORK_OLK
1583 // Do the network intialization
1584 if ( fgGetBool("/sim/networking/network-olk") ) {
1585 printf("Multipilot mode %s\n",
1586 fg_net_init( globals->get_scene_graph() ) );
1590 // build our custom render states
1591 fgBuildRenderStates();
1593 // pass control off to the master GLUT event handler
1596 // we never actually get here ... but to avoid compiler warnings,
1602 // $$$ end - added VS Renganathan, 15 Oct 2K
1603 // - added Venky , 12 Nov 2K
1605 #if defined(__linux__) && defined(__i386__)
1607 static void handleFPE (int);
1612 fpu_control_t fpe_flags = 0;
1613 _FPU_GETCW(fpe_flags);
1614 // fpe_flags &= ~_FPU_MASK_IM; // invalid operation
1615 // fpe_flags &= ~_FPU_MASK_DM; // denormalized operand
1616 // fpe_flags &= ~_FPU_MASK_ZM; // zero-divide
1617 // fpe_flags &= ~_FPU_MASK_OM; // overflow
1618 // fpe_flags &= ~_FPU_MASK_UM; // underflow
1619 // fpe_flags &= ~_FPU_MASK_PM; // precision (inexact result)
1620 _FPU_SETCW(fpe_flags);
1621 signal(SIGFPE, handleFPE);
1628 SG_LOG(SG_GENERAL, SG_ALERT, "Floating point interrupt (SIGFPE)");
1632 // Main entry point; catch any exceptions that have made it this far.
1633 int main ( int argc, char **argv ) {
1635 // Enable floating-point exceptions for Linux/x86
1636 #if defined(__linux__) && defined(__i386__)
1640 // Enable floating-point exceptions for Windows
1641 #if defined( _MSC_VER ) && defined( DEBUG )
1642 // Christian, we should document what this does
1643 _control87( _EM_INEXACT, _MCW_EM );
1646 #if defined( HAVE_BC5PLUS )
1647 _control87(MCW_EM, MCW_EM); /* defined in float.h */
1650 // FIXME: add other, more specific
1653 mainLoop(argc, argv);
1654 } catch (sg_throwable &t) {
1655 // We must use cerr rather than
1656 // logging, since logging may be
1658 cerr << "Fatal error: " << t.getFormattedMessage()
1659 << "\n (received from " << t.getOrigin() << ')' << endl;
1667 void fgLoadDCS(void) {
1669 ssgEntity *ship_obj = NULL;
1671 char obj_filename[25];
1673 for ( int k = 0; k < 32; k++ ) {
1677 SGPath tile_path( globals->get_fg_root());
1678 tile_path.append( "Scenery" );
1679 tile_path.append( "Objects.txt" );
1680 sg_gzifstream in( tile_path.str() );
1681 if ( ! in.is_open() ) {
1682 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << tile_path.str() );
1685 SGPath modelpath( globals->get_fg_root() );
1686 modelpath.append( "Models" );
1687 modelpath.append( "Geometry" );
1689 SGPath texturepath( globals->get_fg_root() );
1690 texturepath.append( "Models" );
1691 texturepath.append( "Textures" );
1693 ssgModelPath( (char *)modelpath.c_str() );
1694 ssgTexturePath( (char *)texturepath.c_str() );
1696 ship_sel = new ssgSelector;
1699 while ( ! in.eof() ) {
1701 if ( in.get( c ) && c == '#' ) {
1705 in >> obj_filename >> obj_lat[objc] >> obj_lon[objc] >> obj_alt[objc];
1706 /* cout << endl << obj_filename << " " << obj_lat[objc] << " " << obj_lon[objc] << " " << obj_alt[objc] << endl;
1707 int chj=getchar();*/
1709 obj_lon[objc] *=SGD_DEGREES_TO_RADIANS;
1710 obj_lat[objc] *=SGD_DEGREES_TO_RADIANS;
1712 ship_pos[objc] = new ssgTransform;
1714 // type "repeat" in objects.txt to load one more
1715 // instance of the last object.
1717 if ( strcmp(obj_filename,"repeat") != 0) {
1718 ship_obj = ssgLoad( obj_filename );
1721 if ( ship_obj != NULL ) {
1722 ship_obj->setName(obj_filename);
1724 ship_obj->clrTraversalMaskBits( SSGTRAV_HOT );
1726 ship_obj->setTraversalMaskBits( SSGTRAV_HOT );
1727 ship_pos[objc]->addKid( ship_obj ); // add object to transform node
1728 ship_sel->addKid( ship_pos[objc] ); // add transform node to selector
1729 SG_LOG( SG_TERRAIN, SG_ALERT, "Loaded file: "
1732 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: "
1736 // temporary hack for deck lights - ultimately should move to PLib (when??)
1737 //const char *extn = file_extension ( obj_filename ) ;
1739 ssgVertexArray *lights = new ssgVertexArray( 100 );
1740 ssgVertexArray *lightpoints = new ssgVertexArray( 100 );
1741 ssgVertexArray *lightnormals = new ssgVertexArray( 100 );
1742 ssgVertexArray *lightdir = new ssgVertexArray( 100 );
1743 int ltype[500], light_type;
1744 static int ltcount = 0;
1746 sgVec3 rway_dir,rway_normal,lightpt;
1748 modelpath.append(obj_filename);
1749 sg_gzifstream in1( modelpath.str() );
1750 if ( ! in1.is_open() ) {
1751 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << modelpath.str() );
1753 while ( ! in1.eof() ) {
1755 if ( in1.get( c ) && c == '#' ) {
1760 //cout << token << endl;
1761 if ( token == "runway" ) {
1763 sgSetVec3 (rway_dir, node[0], node[1], node[2] );
1764 } else if ( token == "edgelight" ) {
1766 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1768 } else if ( token == "taxi" ) {
1770 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1772 } else if ( token == "vasi" ) {
1774 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1776 } else if ( token == "threshold" ) {
1778 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1780 } else if ( token == "rabbit" ) {
1782 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1784 } else if ( token == "ols" ) {
1786 sgSetVec3 (rway_ols, node[0], node[1], node[2] );
1788 } else if ( token == "red" ) {
1790 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1792 } else if ( token == "green" ) {
1794 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1796 } else if ( token == "lp" ) {
1798 sgSetVec3 (lightpt, node[0], node[1], node[2] );
1799 lightpoints->add( lightpt );
1800 lightnormals->add( rway_normal );
1801 lightdir->add( rway_dir );
1802 ltype[ltcount]= light_type;
1805 if (in1.eof()) break;
1809 if ( lightpoints->getNum() ) {
1810 ssgBranch *lightpoints_branch;
1811 long int dummy = -999;
1812 dummy_tile = new FGTileEntry((SGBucket)dummy);
1813 dummy_tile->lightmaps_sequence = new ssgSelector;
1814 dummy_tile->ols_transform = new ssgTransform;
1816 // call function to generate the runway lights
1817 lightpoints_branch =
1818 dummy_tile->gen_runway_lights( lightpoints, lightnormals,
1820 lightpoints_brightness->addKid(lightpoints_branch);
1821 lightpoints_transform->addKid(lightpoints_brightness);
1822 //dummy_tile->lightmaps_sequence->setTraversalMaskBits( SSGTRAV_HOT );
1823 lightpoints_transform->addKid( dummy_tile->lightmaps_sequence );
1824 lightpoints_transform->ref();
1825 globals->get_gnd_lights_branch()->addKid( lightpoints_transform );
1829 // end hack for deck lights
1833 if (in.eof()) break;
1837 SG_LOG ( SG_TERRAIN, SG_ALERT, "Finished object processing." );
1839 globals->get_terrain_branch()->addKid( ship_sel ); //add selector node to root node
1846 void fgUpdateDCS (void) {
1848 // double eye_lat,eye_lon,eye_alt;
1849 // static double obj_head;
1850 double sl_radius,obj_latgc;
1851 // float nresultmat[4][4];
1852 // sgMat4 Trans,rothead,rotlon,rot180,rotlat,resultmat1,resultmat2,resultmat3;
1855 // Instantaneous Geodetic Lat/Lon/Alt of moving object
1856 FGADA *fdm = (FGADA *)current_aircraft.fdm_state;
1858 // Deck should be the first object in objects.txt in case of fdm=ada
1860 if (!strcmp(fgGetString("/sim/flight-model"), "ada")) {
1861 if ((fdm->get_iaux(1))==1)
1863 obj_lat[1] = fdm->get_daux(1)*SGD_DEGREES_TO_RADIANS;
1864 obj_lon[1] = fdm->get_daux(2)*SGD_DEGREES_TO_RADIANS;
1865 obj_alt[1] = fdm->get_daux(3);
1866 obj_pitch[1] = fdm->get_faux(1);
1867 obj_roll[1] = fdm->get_faux(2);
1871 for ( int m = 0; m < objc; m++ ) {
1872 //cout << endl << obj_lat[m]*SGD_RADIANS_TO_DEGREES << " " << obj_lon[m]*SGD_RADIANS_TO_DEGREES << " " << obj_alt[m] << " " << objc << endl;
1875 //Geodetic to Geocentric angles for rotation
1876 sgGeodToGeoc(obj_lat[m],obj_alt[m],&sl_radius,&obj_latgc);
1878 //moving object gbs-posn in cartesian coords
1879 Point3D obj_posn = Point3D( obj_lon[m],obj_lat[m],obj_alt[m]);
1880 Point3D obj_pos = sgGeodToCart( obj_posn );
1882 // Translate moving object w.r.t eye
1883 Point3D Objtrans = obj_pos-scenery.get_center();
1888 // rotate dynamic objects for lat,lon & alt and other motion about its axes
1891 sgMakeTransMat4( sgTRANS, bz[0],bz[1],bz[2]);
1893 sgVec3 ship_fwd,ship_rt,ship_up;
1894 sgSetVec3( ship_fwd, 1.0, 0.0, 0.0);//east,roll
1895 sgSetVec3( ship_rt, 0.0, 1.0, 0.0);//up,pitch
1896 sgSetVec3( ship_up, 0.0, 0.0, 1.0); //north,yaw
1898 sgMat4 sgROT_lon, sgROT_lat, sgROT_hdg, sgROT_pitch, sgROT_roll;
1899 sgMakeRotMat4( sgROT_lon, obj_lon[m]*SGD_RADIANS_TO_DEGREES, ship_up );
1900 sgMakeRotMat4( sgROT_lat, 90-obj_latgc*SGD_RADIANS_TO_DEGREES, ship_rt );
1901 sgMakeRotMat4( sgROT_hdg, 180.0, ship_up );
1902 sgMakeRotMat4( sgROT_pitch, obj_pitch[m], ship_rt );
1903 sgMakeRotMat4( sgROT_roll, obj_roll[m], ship_fwd );
1906 sgCopyMat4( sgTUX, sgROT_hdg );
1907 sgPostMultMat4( sgTUX, sgROT_pitch );
1908 sgPostMultMat4( sgTUX, sgROT_roll );
1909 sgPostMultMat4( sgTUX, sgROT_lat );
1910 sgPostMultMat4( sgTUX, sgROT_lon );
1911 sgPostMultMat4( sgTUX, sgTRANS );
1914 sgSetCoord(&shippos, sgTUX );
1915 ship_pos[m]->setTransform( &shippos );
1916 // temporary hack for deck lights - ultimately should move to PLib (when ??)
1918 if (lightpoints_transform) {
1919 lightpoints_transform->setTransform( &shippos );
1920 float sun_angle = cur_light_params.sun_angle * SGD_RADIANS_TO_DEGREES;
1921 if ( sun_angle > 89 ) {
1922 lightpoints_brightness->select(0x01);
1924 lightpoints_brightness->select(0x00);
1933 sgXformPnt3( rp, rway_ols, sgTUX );
1934 vp = globals->get_current_view()->get_view_pos();
1935 to[0] = rp[0]-vp[0];
1936 to[1] = rp[1]-vp[1];
1937 to[2] = rp[2]-vp[2];
1938 float dist = sgLengthVec3( to );
1939 alt = (current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER)-rway_ols[2];
1941 elev = asin(alt/dist)*SGD_RADIANS_TO_DEGREES;
1943 ref_elev = elev - 3.75; // +ve above, -ve below
1947 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1948 // if (ref_elev > 0.51) sel = 0x21;
1949 // if ((ref_elev <= 0.51) & (ref_elev > 0.17)) sel = 0x22;
1950 // if ((ref_elev <= 0.17) & (ref_elev >= -0.17)) sel = 0x24;
1951 // if ((ref_elev < -0.17) & (ref_elev >= -0.51)) sel = 0x28;
1952 // if (ref_elev < -0.51) sel = 0x30;
1953 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1954 dummy_tile->lightmaps_sequence->select(sel);
1957 sgCopyVec3 (up, ship_up);
1959 sgScaleVec3 (up, 4.0*ref_elev*dist/750.0);
1961 sgScaleVec3 (up, 4.0*ref_elev);
1962 dummy_tile->ols_transform->setTransform(up);
1963 //cout << "ref_elev " << ref_elev << endl;
1965 // end hack for deck lights
1968 if ( ship_sel != NULL ) {
1969 ship_sel->select(0xFFFFFFFE); // first object is ownship, added to acmodel
1973 // $$$ end - added VS Renganathan, 15 Oct 2K
1974 // added Venky , 12 Nov 2K