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>
39 #include <simgear/misc/exception.hxx>
40 #include <simgear/ephemeris/ephemeris.hxx>
41 #include <simgear/route/route.hxx>
43 #ifdef SG_MATH_EXCEPTION_CLASH
56 #include <string.h> // for strcmp()
63 #ifdef HAVE_SYS_STAT_H
64 # include <sys/stat.h> // for stat()
68 # include <unistd.h> // for stat()
71 #include <plib/netChat.h>
75 #include <simgear/constants.h> // for VERSION
76 #include <simgear/debug/logstream.hxx>
77 #include <simgear/math/polar3d.hxx>
78 #include <simgear/math/sg_random.h>
79 #include <simgear/misc/sg_path.hxx>
80 #include <simgear/sky/sky.hxx>
81 #include <simgear/timing/sg_time.hxx>
83 #include <Include/general.hxx>
85 #include <Aircraft/aircraft.hxx>
87 #include <ATC/ATCmgr.hxx>
88 #include <ATC/ATCdisplay.hxx>
89 #include <ATC/AIMgr.hxx>
91 #include <Autopilot/newauto.hxx>
93 #include <Cockpit/cockpit.hxx>
94 #include <Cockpit/radiostack.hxx>
95 #include <Cockpit/steam.hxx>
97 #include <FDM/UIUCModel/uiuc_aircraftdir.h>
99 #include <Model/acmodel.hxx>
100 #ifdef FG_NETWORK_OLK
101 #include <NetworkOLK/network.h>
103 #include <Objects/matlib.hxx>
104 #include <Scenery/scenery.hxx>
105 #include <Scenery/tilemgr.hxx>
106 #ifdef ENABLE_AUDIO_SUPPORT
107 # include <Sound/soundmgr.hxx>
108 # include <Sound/fg_fx.hxx>
109 # include <Sound/morse.hxx>
111 #include <Time/FGEventMgr.hxx>
112 #include <Time/fg_timer.hxx>
113 #include <Time/light.hxx>
114 #include <Time/sunpos.hxx>
115 #include <Time/tmp.hxx>
117 #include <Input/input.hxx>
120 #include <simgear/misc/sgstream.hxx>
121 #include <simgear/math/point3d.hxx>
122 #include <FDM/flight.hxx>
123 #include <FDM/ADA.hxx>
124 #include <Scenery/tileentry.hxx>
127 // PFNGLPOINTPARAMETERFEXTPROC glPointParameterfEXT = 0;
128 // PFNGLPOINTPARAMETERFVEXTPROC glPointParameterfvEXT = 0;
130 float default_attenuation[3] = {1.0, 0.0, 0.0};
131 //Required for using GL_extensions
132 void fgLoadDCS (void);
133 void fgUpdateDCS (void);
134 ssgSelector *ship_sel=NULL;
135 // upto 32 instances of a same object can be loaded.
136 ssgTransform *ship_pos[32];
137 double obj_lat[32],obj_lon[32],obj_alt[32],obj_pitch[32],obj_roll[32];
139 ssgSelector *lightpoints_brightness = new ssgSelector;
140 ssgTransform *lightpoints_transform = new ssgTransform;
141 FGTileEntry *dummy_tile;
144 // Clip plane settings...
145 float scene_nearplane = 0.5f;
146 float scene_farplane = 120000.0f;
149 #ifndef FG_NEW_ENVIRONMENT
150 # include <WeatherCM/FGLocalWeatherDatabase.h>
152 # include <Environment/environment_mgr.hxx>
157 #include "fg_init.hxx"
159 #include "fg_props.hxx"
160 #include "globals.hxx"
161 #include "splash.hxx"
162 #include "viewmgr.hxx"
163 #include "options.hxx"
164 #include "logger.hxx"
167 # include <console.h> // -dw- for command line dialog
171 FGEventMgr global_events;
173 // This is a record containing a bit of global housekeeping information
176 // Specify our current idle function state. This is used to run all
177 // our initializations out of the glutIdleLoop() so that we can get a
178 // splash screen up and running right away.
179 static int idle_state = 0;
180 static long global_multi_loop;
182 // forward declaration
183 void fgReshape( int width, int height );
186 ssgRoot *scene = NULL;
187 ssgBranch *terrain_branch = NULL;
188 ssgBranch *gnd_lights_branch = NULL;
189 ssgBranch *rwy_lights_branch = NULL;
191 // fog constants. I'm a little nervous about putting actual code out
192 // here but it seems to work (?)
193 static const double m_log01 = -log( 0.01 );
194 static const double sqrt_m_log01 = sqrt( m_log01 );
195 static GLfloat fog_exp_density;
196 static GLfloat fog_exp2_density;
197 static GLfloat fog_exp2_punch_through;
199 ssgRoot *lighting = NULL;
200 // ssgBranch *airport = NULL;
202 #ifdef FG_NETWORK_OLK
203 ssgSelector *fgd_sel = NULL;
204 ssgTransform *fgd_pos = NULL;
207 // current fdm/position used for view
208 FGInterface cur_view_fdm;
214 sgMat4 copy_of_ssgOpenGLAxisSwapMatrix =
216 { 1.0f, 0.0f, 0.0f, 0.0f },
217 { 0.0f, 0.0f, -1.0f, 0.0f },
218 { 0.0f, 1.0f, 0.0f, 0.0f },
219 { 0.0f, 0.0f, 0.0f, 1.0f }
222 // The following defines flightgear options. Because glutlib will also
223 // want to parse its own options, those options must not be included here
224 // or they will get parsed by the main program option parser. Hence case
225 // is significant for any option added that might be in conflict with
228 // glutlib parses for:
230 // -direct (invalid in Win32)
234 // -indirect (invalid in Win32)
237 // Note that glutlib depends upon strings while this program's
238 // option parser wants only initial characters followed by numbers
243 ssgSimpleState *default_state;
244 ssgSimpleState *hud_and_panel;
245 ssgSimpleState *menus;
247 SGTimeStamp start_time_stamp;
248 SGTimeStamp current_time_stamp;
250 void fgBuildRenderStates( void ) {
251 default_state = new ssgSimpleState;
252 default_state->ref();
253 default_state->disable( GL_TEXTURE_2D );
254 default_state->enable( GL_CULL_FACE );
255 default_state->enable( GL_COLOR_MATERIAL );
256 default_state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
257 default_state->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
258 default_state->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
259 default_state->disable( GL_BLEND );
260 default_state->disable( GL_ALPHA_TEST );
261 default_state->disable( GL_LIGHTING );
263 hud_and_panel = new ssgSimpleState;
264 hud_and_panel->ref();
265 hud_and_panel->disable( GL_CULL_FACE );
266 hud_and_panel->disable( GL_TEXTURE_2D );
267 hud_and_panel->disable( GL_LIGHTING );
268 hud_and_panel->enable( GL_BLEND );
270 menus = new ssgSimpleState;
272 menus->disable( GL_CULL_FACE );
273 menus->disable( GL_TEXTURE_2D );
274 menus->enable( GL_BLEND );
278 // fgInitVisuals() -- Initialize various GL/view parameters
279 void fgInitVisuals( void ) {
282 l = &cur_light_params;
284 #ifndef GLUT_WRONG_VERSION
285 // Go full screen if requested ...
286 if ( fgGetBool("/sim/startup/fullscreen") ) {
291 // If enabled, normal vectors specified with glNormal are scaled
292 // to unit length after transformation. Enabling this has
293 // performance implications. See the docs for glNormal.
294 // glEnable( GL_NORMALIZE );
296 glEnable( GL_LIGHTING );
297 glEnable( GL_LIGHT0 );
298 glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
301 sgSetVec3( sunpos, l->sun_vec[0], l->sun_vec[1], l->sun_vec[2] );
302 ssgGetLight( 0 ) -> setPosition( sunpos );
304 glFogi (GL_FOG_MODE, GL_EXP2);
305 if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
306 (!fgGetBool("/sim/rendering/shading"))) {
307 // if fastest fog requested, or if flat shading force fastest
308 glHint ( GL_FOG_HINT, GL_FASTEST );
309 } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
310 glHint ( GL_FOG_HINT, GL_NICEST );
312 if ( fgGetBool("/sim/rendering/wireframe") ) {
314 glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
317 // This is the default anyways, but it can't hurt
318 glFrontFace ( GL_CCW );
321 // glEnable(GL_POINT_SMOOTH);
322 // glEnable(GL_LINE_SMOOTH);
323 // glEnable(GL_POLYGON_SMOOTH);
327 // For HiRes screen Dumps using Brian Pauls TR Library
328 void trRenderFrame( void ) {
330 if ( fgPanelVisible() ) {
331 GLfloat height = fgGetInt("/sim/startup/ysize");
333 (current_panel->getViewHeight() - current_panel->getYOffset())
334 * (height / 768.0) + 1;
335 glTranslatef( 0.0, view_h, 0.0 );
338 static GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
339 static GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
341 fgLIGHT *l = &cur_light_params;
343 glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
344 l->adj_fog_color[2], l->adj_fog_color[3]);
346 glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
348 // set the opengl state to known default values
349 default_state->force();
352 glFogf ( GL_FOG_DENSITY, fog_exp2_density);
353 glFogi ( GL_FOG_MODE, GL_EXP2 );
354 glFogfv ( GL_FOG_COLOR, l->adj_fog_color );
356 // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
357 // we only update GL_AMBIENT for our lights we will never get
358 // a completely dark scene. So, we set GL_LIGHT_MODEL_AMBIENT
359 // explicitely to black.
360 glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
362 ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
364 // texture parameters
365 glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
366 glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
368 // we need a white diffuse light for the phase of the moon
369 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
372 // draw the ssg scene
373 // return to the desired diffuse color
374 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
375 glEnable( GL_DEPTH_TEST );
376 ssgSetNearFar( scene_nearplane, scene_farplane );
377 ssgCullAndDraw( scene );
380 glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
381 ssgSetNearFar( scene_nearplane, scene_farplane );
382 ssgCullAndDraw( lighting );
384 thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
386 globals->get_aircraft_model()->draw();
388 // need to do this here as hud_and_panel state is static to
389 // main.cxx and HUD and Panel routines have to be called with
390 // knowledge of the the TR struct < see gui.cxx::HighResDump()
391 hud_and_panel->apply();
395 // Update all Visuals (redraws anything graphics related)
396 void fgRenderFrame( void ) {
398 static long old_elapsed_ms = 0;
400 int dt_ms = int(globals->get_elapsed_time_ms() - old_elapsed_ms);
401 old_elapsed_ms = globals->get_elapsed_time_ms();
403 // Process/manage pending events
404 global_events.update( dt_ms );
406 static const SGPropertyNode *longitude
407 = fgGetNode("/position/longitude-deg");
408 static const SGPropertyNode *latitude
409 = fgGetNode("/position/latitude-deg");
410 static const SGPropertyNode *altitude
411 = fgGetNode("/position/altitude-ft");
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();
597 // if (fgGetBool("/sim/view/internal"))
598 // ssgSetNearFar( 0.2f, 120000.0f );
599 // else if ( agl > 10.0)
602 scene_nearplane = 10.0f;
603 scene_farplane = 120000.0f;
605 scene_nearplane = 0.5f;
606 scene_farplane = 120000.0f;
609 ssgSetNearFar( scene_nearplane, scene_farplane );
611 // $$$ begin - added VS Renganthan 17 Oct 2K
614 // $$$ end - added VS Renganthan 17 Oct 2K
616 # ifdef FG_NETWORK_OLK
617 if ( fgGetBool("/sim/networking/network-olk") ) {
619 other = head->next; /* put listpointer to start */
620 while ( other != tail) { /* display all except myself */
621 if ( strcmp( other->ipadr, fgd_mcp_ip) != 0) {
622 other->fgd_sel->select(1);
623 sgSetCoord( &fgdpos, other->sgFGD_COORD );
624 other->fgd_pos->setTransform( &fgdpos );
629 // fgd_sel->select(1);
630 // sgCopyMat4( sgTUX, current_view.sgVIEW);
632 // sgSetCoord( &fgdpos, sgFGD_VIEW );
633 // fgd_pos->setTransform( &fgdpos);
637 // position tile nodes and update range selectors
638 global_tile_mgr.prep_ssg_nodes(visibility_meters);
640 if ( fgGetBool("/sim/rendering/skyblend") ) {
641 // draw the sky backdrop
643 // we need a white diffuse light for the phase of the moon
644 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
648 // return to the desired diffuse color
649 ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
652 // draw the ssg scene
653 glEnable( GL_DEPTH_TEST );
655 ssgSetNearFar( scene_nearplane, scene_farplane );
656 ssgCullAndDraw( scene );
658 // change state for lighting here
661 // Set punch through fog density
662 glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
664 #ifdef FG_EXPERIMENTAL_LIGHTING
665 // Enable states for drawing points with GL_extension
666 if (glutExtensionSupported("GL_EXT_point_parameters")) {
667 glEnable(GL_POINT_SMOOTH);
668 float quadratic[3] = {1.0, 0.01, 0.0001};
669 // get the address of our OpenGL extensions
671 glPointParameterfEXT = (PFNGLPOINTPARAMETERFEXTPROC)
672 wglGetProcAddress("glPointParameterfEXT");
673 glPointParameterfvEXT = (PFNGLPOINTPARAMETERFVEXTPROC)
674 wglGetProcAddress("glPointParameterfvEXT");
676 // makes the points fade as they move away
677 glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT, quadratic);
678 glPointParameterfEXT(GL_POINT_SIZE_MIN_EXT, 1.0);
681 // Enable states for drawing runway lights with spherical mapping
682 glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
683 glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
684 glEnable(GL_TEXTURE_GEN_S);
685 glEnable(GL_TEXTURE_GEN_T);
687 //Maybe this is not the best way, but it works !!
688 glPolygonMode(GL_FRONT, GL_POINT);
690 glEnable(GL_CULL_FACE);
693 glDisable( GL_LIGHTING );
694 // blending function for runway lights
695 glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) ;
699 ssgSetNearFar( scene_nearplane, scene_farplane );
700 ssgCullAndDraw( lighting );
703 #ifdef FG_EXPERIMENTAL_LIGHTING
704 if (glutExtensionSupported("GL_EXT_point_parameters")) {
705 // Disable states used for runway lighting
706 glPolygonMode(GL_FRONT, GL_FILL);
708 glDisable(GL_TEXTURE_GEN_S);
709 glDisable(GL_TEXTURE_GEN_T);
710 glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT,
711 default_attenuation);
717 if ( fgGetBool("/sim/rendering/skyblend") ) {
718 // draw the sky cloud layers
719 thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
722 globals->get_aircraft_model()->draw();
724 // display HUD && Panel
726 glDisable( GL_DEPTH_TEST );
727 // glDisable( GL_CULL_FACE );
728 // glDisable( GL_TEXTURE_2D );
730 // update the input subsystem
731 current_input.update(dt_ms);
733 // update the controls subsystem
734 globals->get_controls()->update(dt_ms);
736 hud_and_panel->apply();
739 // Use the hud_and_panel ssgSimpleState for rendering the ATC output
740 // This only works properly if called before the panel call
741 globals->get_ATC_display()->update(dt_ms);
743 // update the panel subsystem
744 if ( current_panel != NULL ) {
745 current_panel->update(dt_ms);
748 // We can do translucent menus, so why not. :-)
750 glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
752 // glDisable ( GL_BLEND ) ;
754 // glEnable( GL_FOG );
756 globals->get_logger()->update(dt_ms);
763 // Update internal time dependent calculations (i.e. flight model)
764 void fgUpdateTimeDepCalcs() {
765 static bool inited = false;
766 static const SGPropertyNode *master_freeze
767 = fgGetNode("/sim/freeze/master");
769 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
771 fgLIGHT *l = &cur_light_params;
776 // Initialize the FDM here if it hasn't been and if we have a
777 // scenery elevation hit.
779 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
780 // << " cur_elev = " << scenery.get_cur_elev() << endl;
782 if ( !cur_fdm_state->get_inited() && scenery.get_cur_elev() > -9990 ) {
783 SG_LOG(SG_FLIGHT,SG_INFO, "Finally initializing fdm");
785 cur_fdm_state->init();
786 if ( cur_fdm_state->get_bound() ) {
787 cur_fdm_state->unbind();
789 cur_fdm_state->bind();
792 // conceptually, the following block could be done for each fdm
794 if ( !cur_fdm_state->get_inited() ) {
795 // do nothing, fdm isn't inited yet
796 } else if ( master_freeze->getBoolValue() ) {
797 // we are frozen, run the fdm's with 0 time slices in case
798 // they want to do something with that.
800 cur_fdm_state->update( 0 );
801 FGSteam::update( 0 );
803 // we have been inited, and we are not frozen, we are good to go ...
806 cur_fdm_state->stamp();
812 long elapsed = current - cur_fdm_state->get_time_stamp();
813 cur_fdm_state->set_time_stamp( current );
814 elapsed += cur_fdm_state->get_remainder();
815 // cout << "elapsed = " << elapsed << endl;
816 // cout << "dt = " << cur_fdm_state->get_delta_t() << endl;
817 multi_loop = (long)(((double)elapsed * 0.000001) /
818 cur_fdm_state->get_delta_t() );
819 cur_fdm_state->set_multi_loop( multi_loop );
820 long remainder = elapsed - (long)( (multi_loop*1000000) *
821 cur_fdm_state->get_delta_t() );
822 cur_fdm_state->set_remainder( remainder );
823 // cout << "remainder = " << remainder << endl;
825 // chop max interations to something reasonable if the sim was
826 // delayed for an excesive amount of time
827 if ( multi_loop > 2.0 / cur_fdm_state->get_delta_t() ) {
828 multi_loop = (int)(2.0 / cur_fdm_state->get_delta_t());
829 cur_fdm_state->set_remainder( 0 );
832 // cout << "multi_loop = " << multi_loop << endl;
833 for ( i = 0; i < multi_loop * fgGetInt("/sim/speed-up"); ++i ) {
834 // run Autopilot system
835 globals->get_autopilot()->update(0); // FIXME: use real dt
838 cur_fdm_state->update( 1 );
840 FGSteam::update( multi_loop * fgGetInt("/sim/speed-up") );
843 if ( !strcmp(fgGetString("/sim/view-mode"), "pilot") ) {
844 cur_view_fdm = *cur_fdm_state;
849 globals->get_aircraft_model()->update(multi_loop);
851 // update the view angle
852 globals->get_viewmgr()->update(multi_loop);
856 // Update solar system
857 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
858 globals->get_time_params()->getLst(),
859 cur_fdm_state->get_Latitude() );
861 // Update radio stack model
862 current_radiostack->update(multi_loop);
866 void fgInitTimeDepCalcs( void ) {
871 static const double alt_adjust_ft = 3.758099;
872 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
875 // What should we do when we have nothing else to do? Let's get ready
876 // for the next move and update the display?
877 static void fgMainLoop( void ) {
878 static const SGPropertyNode *longitude
879 = fgGetNode("/position/longitude-deg");
880 static const SGPropertyNode *latitude
881 = fgGetNode("/position/latitude-deg");
882 static const SGPropertyNode *altitude
883 = fgGetNode("/position/altitude-ft");
884 static const SGPropertyNode *clock_freeze
885 = fgGetNode("/sim/freeze/clock", true);
886 static const SGPropertyNode *cur_time_override
887 = fgGetNode("/sim/time/cur-time-override", true);
889 static long remainder = 0;
891 #ifdef FANCY_FRAME_COUNTER
895 static time_t last_time = 0;
896 static int frames = 0;
897 #endif // FANCY_FRAME_COUNTER
899 SGTime *t = globals->get_time_params();
901 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
902 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
904 #ifdef FG_NETWORK_OLK
905 if ( fgGetBool("/sim/networking/network-olk") ) {
906 if ( net_is_registered == 0 ) { // We first have to reg. to fgd
907 // printf("FGD: Netupdate\n");
908 fgd_send_com( "A", FGFS_host); // Send Mat4 data
909 fgd_send_com( "B", FGFS_host); // Recv Mat4 data
914 #if defined( ENABLE_PLIB_JOYSTICK )
915 // Read joystick and update control settings
916 // if ( fgGetString("/sim/control-mode") == "joystick" )
920 #elif defined( ENABLE_GLUT_JOYSTICK )
921 // Glut joystick support works by feeding a joystick handler
922 // function to glut. This is taken care of once in the joystick
923 // init routine and we don't have to worry about it again.
926 #ifdef FG_NEW_ENVIRONMENT
927 globals->get_environment_mgr()->update(0); // FIXME: use real delta time
930 // Fix elevation. I'm just sticking this here for now, it should
931 // probably move eventually
933 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
934 scenery.get_cur_elev(),
935 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
936 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
938 if ( scenery.get_cur_elev() > -9990 && cur_fdm_state->get_inited() ) {
939 if ( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER <
940 (scenery.get_cur_elev() + alt_adjust_m - 3.0) ) {
941 // now set aircraft altitude above ground
942 printf("(*) Current Altitude = %.2f < %.2f forcing to %.2f\n",
943 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
944 scenery.get_cur_elev() + alt_adjust_m - 3.0,
945 scenery.get_cur_elev() + alt_adjust_m );
946 cur_fdm_state->set_Altitude( scenery.get_cur_elev()
949 SG_LOG( SG_ALL, SG_DEBUG,
950 "<*> resetting altitude to "
951 << cur_fdm_state->get_Altitude() * SG_FEET_TO_METER
956 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
957 scenery.get_cur_elev(),
958 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
959 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
961 // cout << "Warp = " << globals->get_warp() << endl;
964 static bool last_clock_freeze = false;
966 if ( clock_freeze->getBoolValue() ) {
967 // clock freeze requested
968 if ( cur_time_override->getLongValue() == 0 ) {
969 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
970 globals->set_warp( 0 );
973 // no clock freeze requested
974 if ( last_clock_freeze == true ) {
975 // clock just unfroze, let's set warp as the difference
976 // between frozen time and current time so we don't get a
977 // time jump (and corresponding sky object and lighting
979 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
980 fgSetLong( "/sim/time/cur-time-override", 0 );
982 if ( globals->get_warp_delta() != 0 ) {
983 globals->inc_warp( globals->get_warp_delta() );
987 last_clock_freeze = clock_freeze->getBoolValue();
989 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
990 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
991 cur_time_override->getLongValue(),
992 globals->get_warp() );
994 if ( globals->get_warp_delta() != 0 ) {
995 fgUpdateSkyAndLightingParams();
998 // update magvar model
999 globals->get_mag()->update( longitude->getDoubleValue()
1000 * SGD_DEGREES_TO_RADIANS,
1001 latitude->getDoubleValue()
1002 * SGD_DEGREES_TO_RADIANS,
1003 altitude->getDoubleValue() * SG_FEET_TO_METER,
1004 globals->get_time_params()->getJD() );
1006 // Get elapsed time (in usec) for this past frame
1007 elapsed = fgGetTimeInterval();
1008 SG_LOG( SG_ALL, SG_DEBUG,
1009 "Elapsed time interval is = " << elapsed
1010 << ", previous remainder is = " << remainder );
1012 // Calculate frame rate average
1013 #ifdef FANCY_FRAME_COUNTER
1014 /* old fps calculation */
1015 if ( elapsed > 0 ) {
1018 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
1019 tmp = general.get_frame(i);
1021 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
1022 general.set_frame(i+1,tmp);
1024 tmp = 1000000.0 / (float)elapsed;
1025 general.set_frame(0,tmp);
1026 // printf("frame[0] = %.2f\n", general.frames[0]);
1028 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
1029 // printf("ave = %.2f\n", general.frame_rate);
1032 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
1033 general.set_frame_rate( frames );
1034 SG_LOG( SG_ALL, SG_DEBUG,
1035 "--> Frame rate is = " << general.get_frame_rate() );
1038 last_time = t->get_cur_time();
1042 // Run ATC subsystem
1043 globals->get_ATC_mgr()->update(1); // FIXME - use real dt.
1045 // Run the AI subsystem
1046 globals->get_AI_mgr()->update(1); // FIXME - use real dt.
1050 // Calculate model iterations needed for next frame
1051 elapsed += remainder;
1053 global_multi_loop = (long)(((double)elapsed * 0.000001) *
1054 fgGetInt("/sim/model-hz"));
1055 remainder = elapsed - ( (global_multi_loop*1000000) /
1056 fgGetInt("/sim/model-hz") );
1057 SG_LOG( SG_ALL, SG_DEBUG,
1058 "Model iterations needed = " << global_multi_loop
1059 << ", new remainder = " << remainder );
1061 // chop max interations to something reasonable if the sim was
1062 // delayed for an excesive amount of time
1063 if ( global_multi_loop > 2.0 * fgGetInt("/sim/model-hz") ) {
1064 global_multi_loop = (int)(2.0 * fgGetInt("/sim/model-hz") );
1069 if ( global_multi_loop > 0 ) {
1070 fgUpdateTimeDepCalcs();
1072 SG_LOG( SG_ALL, SG_DEBUG,
1073 "Elapsed time is zero ... we're zinging" );
1076 #if ! defined( macintosh )
1077 // Do any I/O channel work that might need to be done
1081 // see if we need to load any new scenery tiles
1082 double visibility_meters = fgGetDouble("/environment/visibility-m");
1083 global_tile_mgr.update( longitude->getDoubleValue(),
1084 latitude->getDoubleValue(), visibility_meters );
1086 // see if we need to load any deferred-load textures
1087 material_lib.load_next_deferred();
1089 // Run audio scheduler
1090 #ifdef ENABLE_AUDIO_SUPPORT
1091 if ( fgGetBool("/sim/sound/audible")
1092 && globals->get_soundmgr()->is_working() ) {
1093 globals->get_fx()->update(1); // FIXME: use dt
1094 globals->get_soundmgr()->update(1); // FIXME: use dt
1101 SG_LOG( SG_ALL, SG_DEBUG, "" );
1105 // This is the top level master main function that is registered as
1106 // our idle funciton
1108 // The first few passes take care of initialization things (a couple
1109 // per pass) and once everything has been initialized fgMainLoop from
1112 static void fgIdleFunction ( void ) {
1113 // printf("idle state == %d\n", idle_state);
1115 if ( idle_state == 0 ) {
1116 // Initialize the splash screen right away
1117 if ( fgGetBool("/sim/startup/splash-screen") ) {
1122 } else if ( idle_state == 1 ) {
1123 // Initialize audio support
1124 #ifdef ENABLE_AUDIO_SUPPORT
1126 // Start the intro music
1127 if ( fgGetBool("/sim/startup/intro-music") ) {
1128 SGPath mp3file( globals->get_fg_root() );
1129 mp3file.append( "Sounds/intro.mp3" );
1131 SG_LOG( SG_GENERAL, SG_INFO,
1132 "Starting intro music: " << mp3file.str() );
1134 #if defined( __CYGWIN__ )
1135 string command = "start /m `cygpath -w " + mp3file.str() + "`";
1136 #elif defined( WIN32 )
1137 string command = "start /m " + mp3file.str();
1139 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
1142 system ( command.c_str() );
1145 // This is an 'easter egg' which is kind of a hard thing to
1146 // hide in an open source project -- so I won't try very hard
1147 // to hide it. If you are looking at this now, please, you
1148 // don't want to ruin the surprise. :-) Just forget about it
1149 // and don't look any further; unless it is causing an actual
1150 // problem for you, which it shouldn't, and I hope it doesn't!
1152 if ( globals->get_time_params()->getGmt()->tm_mon == 4
1153 && globals->get_time_params()->getGmt()->tm_mday == 19 )
1155 string url = "http://www.flightgear.org/Music/invasion.mp3";
1156 #if defined( __CYGWIN__ ) || defined( WIN32 )
1157 string command = "start /m " + url;
1159 string command = "mpg123 " + url + "> /dev/null 2>&1";
1161 system( command.c_str() );
1167 } else if ( idle_state == 2 ) {
1168 // These are a few miscellaneous things that aren't really
1169 // "subsystems" but still need to be initialized.
1172 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
1173 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
1178 } else if ( idle_state == 3 ) {
1179 // This is the top level init routine which calls all the
1180 // other subsystem initialization routines. If you are adding
1181 // a subsystem to flightgear, its initialization call should
1182 // located in this routine.
1183 if( !fgInitSubsystems()) {
1184 SG_LOG( SG_GENERAL, SG_ALERT,
1185 "Subsystem initializations failed ..." );
1190 } else if ( idle_state == 4 ) {
1191 // setup OpenGL view parameters
1195 } else if ( idle_state == 5 ) {
1198 } else if ( idle_state == 6 ) {
1202 cout << "Panel visible = " << fgPanelVisible() << endl;
1203 fgReshape( fgGetInt("/sim/startup/xsize"),
1204 fgGetInt("/sim/startup/ysize") );
1207 if ( idle_state == 1000 ) {
1208 // We've finished all our initialization steps, from now on we
1209 // run the main loop.
1211 glutIdleFunc(fgMainLoop);
1213 if ( fgGetBool("/sim/startup/splash-screen") ) {
1214 fgSplashUpdate(0.0);
1219 // options.cxx needs to see this for toggle_panel()
1220 // Handle new window size or exposure
1221 void fgReshape( int width, int height ) {
1224 if ( (!fgGetBool("/sim/virtual-cockpit"))
1225 && fgPanelVisible() && idle_state == 1000 ) {
1226 view_h = (int)(height * (current_panel->getViewHeight() -
1227 current_panel->getYOffset()) / 768.0);
1233 FGViewMgr *viewmgr = globals->get_viewmgr();
1234 for ( int i = 0; i < viewmgr->size(); ++i ) {
1235 viewmgr->get_view(i)->
1236 set_aspect_ratio((float)view_h / (float)width);
1239 glViewport( 0, (GLint)(height - view_h), (GLint)(width), (GLint)(view_h) );
1241 fgSetInt("/sim/startup/xsize", width);
1242 fgSetInt("/sim/startup/ysize", height);
1243 guiInitMouse(width, height);
1245 ssgSetFOV( viewmgr->get_current_view()->get_h_fov(),
1246 viewmgr->get_current_view()->get_v_fov() );
1251 // Initialize GLUT and define a main window
1252 int fgGlutInit( int *argc, char **argv ) {
1254 #if !defined( macintosh )
1255 // GLUT will extract all glut specific options so later on we only
1256 // need wory about our own.
1257 glutInit(argc, argv);
1260 // Define Display Parameters
1261 glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
1263 SG_LOG( SG_GENERAL, SG_INFO, "Opening a window: " <<
1264 fgGetInt("/sim/startup/xsize") << "x"
1265 << fgGetInt("/sim/startup/ysize") );
1267 // Define initial window size
1268 glutInitWindowSize( fgGetInt("/sim/startup/xsize"),
1269 fgGetInt("/sim/startup/ysize") );
1271 // Initialize windows
1272 if ( !fgGetBool("/sim/startup/game-mode")) {
1273 // Open the regular window
1274 glutCreateWindow("FlightGear");
1275 #ifndef GLUT_WRONG_VERSION
1277 // Open the cool new 'game mode' window
1278 char game_mode_str[256];
1279 //#define SYNC_OPENGL_WITH_DESKTOP_SETTINGS
1280 #if defined(WIN32) && defined(SYNC_OPENGL_WITH_DESKTOP_SETTINGS)
1281 #ifndef ENUM_CURRENT_SETTINGS
1282 #define ENUM_CURRENT_SETTINGS ((DWORD)-1)
1283 #define ENUM_REGISTRY_SETTINGS ((DWORD)-2)
1287 dm.dmSize = sizeof(DEVMODE);
1288 EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &dm);
1289 fgSetInt("/sim/startup/xsize", dm.dmPelsWidth);
1290 fgSetInt("/sim/startup/ysize", dm.dmPelsHeight);
1291 glutInitWindowSize( fgGetInt("/sim/startup/xsize"),
1292 fgGetInt("/sim/startup/ysize") );
1293 sprintf( game_mode_str, "%dx%d:%d@%d",
1297 dm.dmDisplayFrequency );
1299 // Open the cool new 'game mode' window
1300 sprintf( game_mode_str, "width=%d height=%d bpp=%d",
1301 fgGetInt("/sim/startup/xsize"),
1302 fgGetInt("/sim/startup/ysize"),
1303 fgGetInt("/sim/rendering/bits-per-pixel"));
1305 #endif // HAVE_WINDOWS_H
1306 SG_LOG( SG_GENERAL, SG_INFO,
1307 "game mode params = " << game_mode_str );
1308 glutGameModeString( game_mode_str );
1309 glutEnterGameMode();
1310 #endif // GLUT_WRONG_VERSION
1313 // This seems to be the absolute earliest in the init sequence
1314 // that these calls will return valid info. Too bad it's after
1315 // we've already created and sized out window. :-(
1316 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
1317 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
1318 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
1319 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
1322 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
1323 general.set_glMaxTexSize( tmp );
1324 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
1326 glGetIntegerv( GL_DEPTH_BITS, &tmp );
1327 general.set_glDepthBits( tmp );
1328 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
1334 // Initialize GLUT event handlers
1335 int fgGlutInitEvents( void ) {
1336 // call fgReshape() on window resizes
1337 glutReshapeFunc( fgReshape );
1339 // keyboard and mouse callbacks are set in FGInput::init
1341 #ifndef FG_NEW_MOUSE
1342 // call guiMouseFunc() whenever our little rodent is used
1343 glutMouseFunc ( guiMouseFunc );
1344 glutMotionFunc (guiMotionFunc );
1345 glutPassiveMotionFunc (guiMotionFunc );
1348 // call fgMainLoop() whenever there is
1349 // nothing else to do
1350 glutIdleFunc( fgIdleFunction );
1353 glutDisplayFunc( fgRenderFrame );
1360 int mainLoop( int argc, char **argv ) {
1362 #if defined( macintosh )
1363 freopen ("stdout.txt", "w", stdout );
1364 freopen ("stderr.txt", "w", stderr );
1365 argc = ccommand( &argv );
1368 // set default log levels
1369 sglog().setLogLevels( SG_ALL, SG_INFO );
1372 #ifdef FLIGHTGEAR_VERSION
1373 version = FLIGHTGEAR_VERSION;
1375 version = "unknown version";
1377 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
1378 << version << endl );
1380 // Allocate global data structures. This needs to happen before
1381 // we parse command line options
1383 globals = new FGGlobals;
1385 #if defined(FG_NEW_ENVIRONMENT)
1386 globals->set_environment_mgr(new FGEnvironmentMgr);
1389 // seed the random number generater
1392 SGRoute *route = new SGRoute;
1393 globals->set_route( route );
1395 FGControls *controls = new FGControls;
1396 globals->set_controls( controls );
1398 string_list *col = new string_list;
1399 globals->set_channel_options_list( col );
1401 // Scan the config file(s) and command line options to see if
1402 // fg_root was specified (ignore all other options for now)
1403 fgInitFGRoot(argc, argv);
1405 // Check for the correct base package version
1406 string base_version = fgBasePackageVersion();
1407 if ( !(base_version == "0.7.9") ) {
1408 // tell the operator how to use this application
1411 SG_LOG( SG_GENERAL, SG_ALERT, "Base package check failed ... "
1412 << "Found version " << base_version << " at: "
1413 << globals->get_fg_root() );
1414 SG_LOG( SG_GENERAL, SG_ALERT, "Please upgrade to version 0.7.9" );
1418 // Initialize the Aircraft directory to "" (UIUC)
1421 // Load the configuration parameters
1422 if ( !fgInitConfig(argc, argv) ) {
1423 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
1427 // Initialize the Window/Graphics environment.
1428 if( !fgGlutInit(&argc, argv) ) {
1429 SG_LOG( SG_GENERAL, SG_ALERT, "GLUT initialization failed ..." );
1433 // Initialize the various GLUT Event Handlers.
1434 if( !fgGlutInitEvents() ) {
1435 SG_LOG( SG_GENERAL, SG_ALERT,
1436 "GLUT event handler initialization failed ..." );
1440 // Initialize plib net interface
1441 netInit( &argc, argv );
1443 // Initialize ssg (from plib). Needs to come before we do any
1444 // other ssg stuff, but after opengl/glut has been initialized.
1447 // Initialize the user interface (we need to do this before
1448 // passing off control to glut and before fgInitGeneral to get our
1452 #ifdef GL_EXT_texture_lod_bias
1453 glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, -0.5 ) ;
1456 // Set position relative to glide slope if requested
1457 fgSetPosFromGlideSlope();
1459 // set current_options lon/lat if an airport id is specified
1460 // cout << "3. airport_id = " << fgGetString("/sim/startup/airport-id") << endl;
1461 if ( fgGetString("/sim/startup/airport-id")[0] != '\0' ) {
1462 // fgSetPosFromAirportID( fgGetString("/sim/startup/airport-id") );
1463 fgSetPosFromAirportIDandHdg( fgGetString("/sim/startup/airport-id"),
1464 fgGetDouble("/orientation/heading-deg") );
1465 // set tower position (a little off the heading for single runway airports)
1466 fgSetTowerPosFromAirportID( fgGetString("/sim/startup/airport-id"), fgGetDouble("orientation/heading") );
1469 SGTime *t = fgInitTime();
1470 globals->set_time_params( t );
1472 // Do some quick general initializations
1473 if( !fgInitGeneral()) {
1474 SG_LOG( SG_GENERAL, SG_ALERT,
1475 "General initializations failed ..." );
1479 SGPath modelpath( globals->get_fg_root() );
1480 ssgModelPath( (char *)modelpath.c_str() );
1482 ////////////////////////////////////////////////////////////////////
1483 // Initialize the 3D aircraft model subsystem.
1484 ////////////////////////////////////////////////////////////////////
1486 globals->set_aircraft_model(new FGAircraftModel);
1487 globals->get_aircraft_model()->init();
1488 globals->get_aircraft_model()->bind();
1490 ////////////////////////////////////////////////////////////////////
1491 // Initialize the view manager subsystem.
1492 ////////////////////////////////////////////////////////////////////
1494 FGViewMgr *viewmgr = new FGViewMgr;
1495 globals->set_viewmgr( viewmgr );
1501 scene = new ssgRoot;
1502 scene->setName( "Scene" );
1504 lighting = new ssgRoot;
1505 lighting->setName( "Lighting" );
1507 // Initialize the sky
1508 SGPath ephem_data_path( globals->get_fg_root() );
1509 ephem_data_path.append( "Astro" );
1510 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
1511 ephem->update( globals->get_time_params()->getMjd(),
1512 globals->get_time_params()->getLst(),
1514 globals->set_ephem( ephem );
1518 SGPath sky_tex_path( globals->get_fg_root() );
1519 sky_tex_path.append( "Textures" );
1520 sky_tex_path.append( "Sky" );
1521 thesky->texture_path( sky_tex_path.str() );
1523 thesky->build( 550.0, 550.0,
1524 globals->get_ephem()->getNumPlanets(),
1525 globals->get_ephem()->getPlanets(), 60000.0,
1526 globals->get_ephem()->getNumStars(),
1527 globals->get_ephem()->getStars(), 60000.0 );
1529 if ( fgGetBool("/environment/clouds/status") ) {
1530 // thesky->add_cloud_layer( 2000.0, 200.0, 50.0, 40000.0,
1531 // SG_CLOUD_OVERCAST );
1532 thesky->add_cloud_layer( fgGetDouble("/environment/clouds/altitude-ft") *
1534 200.0, 50.0, 40000.0,
1535 SG_CLOUD_MOSTLY_CLOUDY );
1536 // thesky->add_cloud_layer( 3000.0, 200.0, 50.0, 40000.0,
1537 // SG_CLOUD_MOSTLY_SUNNY );
1538 thesky->add_cloud_layer( 6000.0, 20.0, 10.0, 40000.0,
1542 // Initialize MagVar model
1543 SGMagVar *magvar = new SGMagVar();
1544 globals->set_mag( magvar );
1547 terrain_branch = new ssgBranch;
1548 terrain_branch->setName( "Terrain" );
1549 scene->addKid( terrain_branch );
1552 gnd_lights_branch = new ssgBranch;
1553 gnd_lights_branch->setName( "Ground Lighting" );
1554 lighting->addKid( gnd_lights_branch );
1556 rwy_lights_branch = new ssgBranch;
1557 rwy_lights_branch->setName( "Runway Lighting" );
1558 lighting->addKid( rwy_lights_branch );
1560 // airport = new ssgBranch;
1561 // airport->setName( "Airport Lighting" );
1562 // lighting->addKid( airport );
1568 #ifdef FG_NETWORK_OLK
1569 // Do the network intialization
1570 if ( fgGetBool("/sim/networking/network-olk") ) {
1571 printf("Multipilot mode %s\n", fg_net_init( scene ) );
1575 // build our custom render states
1576 fgBuildRenderStates();
1578 // pass control off to the master GLUT event handler
1581 // we never actually get here ... but to avoid compiler warnings,
1587 // $$$ end - added VS Renganathan, 15 Oct 2K
1588 // - added Venky , 12 Nov 2K
1590 #if defined(__linux__) && defined(__i386__)
1592 static void handleFPE (int);
1597 fpu_control_t fpe_flags = 0;
1598 _FPU_GETCW(fpe_flags);
1599 // fpe_flags &= ~_FPU_MASK_IM; // invalid operation
1600 // fpe_flags &= ~_FPU_MASK_DM; // denormalized operand
1601 // fpe_flags &= ~_FPU_MASK_ZM; // zero-divide
1602 // fpe_flags &= ~_FPU_MASK_OM; // overflow
1603 // fpe_flags &= ~_FPU_MASK_UM; // underflow
1604 // fpe_flags &= ~_FPU_MASK_PM; // precision (inexact result)
1605 _FPU_SETCW(fpe_flags);
1606 signal(SIGFPE, handleFPE);
1613 SG_LOG(SG_GENERAL, SG_ALERT, "Floating point interrupt (SIGFPE)");
1617 // Main entry point; catch any exceptions that have made it this far.
1618 int main ( int argc, char **argv ) {
1620 // Enable floating-point exceptions for Linux/x86
1621 #if defined(__linux__) && defined(__i386__)
1625 // Enable floating-point exceptions for Windows
1626 #if defined( _MSC_VER ) && defined( DEBUG )
1627 // Christian, we should document what this does
1628 _control87( _EM_INEXACT, _MCW_EM );
1631 #if defined( HAVE_BC5PLUS )
1632 _control87(MCW_EM, MCW_EM); /* defined in float.h */
1635 // FIXME: add other, more specific
1638 mainLoop(argc, argv);
1639 } catch (sg_throwable &t) {
1640 // We must use cerr rather than
1641 // logging, since logging may be
1643 cerr << "Fatal error: " << t.getFormattedMessage()
1644 << "\n (received from " << t.getOrigin() << ')' << endl;
1652 void fgLoadDCS(void) {
1654 ssgEntity *ship_obj = NULL;
1656 char obj_filename[25];
1658 for ( int k = 0; k < 32; k++ ) {
1662 SGPath tile_path( globals->get_fg_root());
1663 tile_path.append( "Scenery" );
1664 tile_path.append( "Objects.txt" );
1665 sg_gzifstream in( tile_path.str() );
1666 if ( ! in.is_open() ) {
1667 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << tile_path.str() );
1670 SGPath modelpath( globals->get_fg_root() );
1671 modelpath.append( "Models" );
1672 modelpath.append( "Geometry" );
1674 SGPath texturepath( globals->get_fg_root() );
1675 texturepath.append( "Models" );
1676 texturepath.append( "Textures" );
1678 ssgModelPath( (char *)modelpath.c_str() );
1679 ssgTexturePath( (char *)texturepath.c_str() );
1681 ship_sel = new ssgSelector;
1684 while ( ! in.eof() ) {
1686 if ( in.get( c ) && c == '#' ) {
1690 in >> obj_filename >> obj_lat[objc] >> obj_lon[objc] >> obj_alt[objc];
1691 /* cout << endl << obj_filename << " " << obj_lat[objc] << " " << obj_lon[objc] << " " << obj_alt[objc] << endl;
1692 int chj=getchar();*/
1694 obj_lon[objc] *=SGD_DEGREES_TO_RADIANS;
1695 obj_lat[objc] *=SGD_DEGREES_TO_RADIANS;
1697 ship_pos[objc] = new ssgTransform;
1699 // type "repeat" in objects.txt to load one more
1700 // instance of the last object.
1702 if ( strcmp(obj_filename,"repeat") != 0) {
1703 ship_obj = ssgLoad( obj_filename );
1706 if ( ship_obj != NULL ) {
1707 ship_obj->setName(obj_filename);
1709 ship_obj->clrTraversalMaskBits( SSGTRAV_HOT );
1711 ship_obj->setTraversalMaskBits( SSGTRAV_HOT );
1712 ship_pos[objc]->addKid( ship_obj ); // add object to transform node
1713 ship_sel->addKid( ship_pos[objc] ); // add transform node to selector
1714 SG_LOG( SG_TERRAIN, SG_ALERT, "Loaded file: "
1717 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: "
1721 // temporary hack for deck lights - ultimately should move to PLib (when??)
1722 //const char *extn = file_extension ( obj_filename ) ;
1724 ssgVertexArray *lights = new ssgVertexArray( 100 );
1725 ssgVertexArray *lightpoints = new ssgVertexArray( 100 );
1726 ssgVertexArray *lightnormals = new ssgVertexArray( 100 );
1727 ssgVertexArray *lightdir = new ssgVertexArray( 100 );
1728 int ltype[500], light_type;
1729 static int ltcount = 0;
1731 sgVec3 rway_dir,rway_normal,lightpt;
1733 modelpath.append(obj_filename);
1734 sg_gzifstream in1( modelpath.str() );
1735 if ( ! in1.is_open() ) {
1736 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << modelpath.str() );
1738 while ( ! in1.eof() ) {
1740 if ( in1.get( c ) && c == '#' ) {
1745 //cout << token << endl;
1746 if ( token == "runway" ) {
1748 sgSetVec3 (rway_dir, node[0], node[1], node[2] );
1749 } else if ( token == "edgelight" ) {
1751 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1753 } else if ( token == "taxi" ) {
1755 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1757 } else if ( token == "vasi" ) {
1759 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1761 } else if ( token == "threshold" ) {
1763 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1765 } else if ( token == "rabbit" ) {
1767 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1769 } else if ( token == "ols" ) {
1771 sgSetVec3 (rway_ols, node[0], node[1], node[2] );
1773 } else if ( token == "red" ) {
1775 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1777 } else if ( token == "green" ) {
1779 sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1781 } else if ( token == "lp" ) {
1783 sgSetVec3 (lightpt, node[0], node[1], node[2] );
1784 lightpoints->add( lightpt );
1785 lightnormals->add( rway_normal );
1786 lightdir->add( rway_dir );
1787 ltype[ltcount]= light_type;
1790 if (in1.eof()) break;
1794 if ( lightpoints->getNum() ) {
1795 ssgBranch *lightpoints_branch;
1796 long int dummy = -999;
1797 dummy_tile = new FGTileEntry((SGBucket)dummy);
1798 dummy_tile->lightmaps_sequence = new ssgSelector;
1799 dummy_tile->ols_transform = new ssgTransform;
1801 // call function to generate the runway lights
1802 lightpoints_branch =
1803 dummy_tile->gen_runway_lights( lightpoints, lightnormals,
1805 lightpoints_brightness->addKid(lightpoints_branch);
1806 lightpoints_transform->addKid(lightpoints_brightness);
1807 //dummy_tile->lightmaps_sequence->setTraversalMaskBits( SSGTRAV_HOT );
1808 lightpoints_transform->addKid( dummy_tile->lightmaps_sequence );
1809 lightpoints_transform->ref();
1810 gnd_lights_branch->addKid( lightpoints_transform );
1814 // end hack for deck lights
1818 if (in.eof()) break;
1822 SG_LOG ( SG_TERRAIN, SG_ALERT, "Finished object processing." );
1824 terrain_branch->addKid( ship_sel ); //add selector node to root node
1831 void fgUpdateDCS (void) {
1833 // double eye_lat,eye_lon,eye_alt;
1834 // static double obj_head;
1835 double sl_radius,obj_latgc;
1836 // float nresultmat[4][4];
1837 // sgMat4 Trans,rothead,rotlon,rot180,rotlat,resultmat1,resultmat2,resultmat3;
1840 // Instantaneous Geodetic Lat/Lon/Alt of moving object
1841 FGADA *fdm = (FGADA *)current_aircraft.fdm_state;
1843 // Deck should be the first object in objects.txt in case of fdm=ada
1845 if (!strcmp(fgGetString("/sim/flight-model"), "ada")) {
1846 if ((fdm->get_iaux(1))==1)
1848 obj_lat[1] = fdm->get_daux(1)*SGD_DEGREES_TO_RADIANS;
1849 obj_lon[1] = fdm->get_daux(2)*SGD_DEGREES_TO_RADIANS;
1850 obj_alt[1] = fdm->get_daux(3);
1851 obj_pitch[1] = fdm->get_faux(1);
1852 obj_roll[1] = fdm->get_faux(2);
1856 for ( int m = 0; m < objc; m++ ) {
1857 //cout << endl << obj_lat[m]*SGD_RADIANS_TO_DEGREES << " " << obj_lon[m]*SGD_RADIANS_TO_DEGREES << " " << obj_alt[m] << " " << objc << endl;
1860 //Geodetic to Geocentric angles for rotation
1861 sgGeodToGeoc(obj_lat[m],obj_alt[m],&sl_radius,&obj_latgc);
1863 //moving object gbs-posn in cartesian coords
1864 Point3D obj_posn = Point3D( obj_lon[m],obj_lat[m],obj_alt[m]);
1865 Point3D obj_pos = sgGeodToCart( obj_posn );
1867 // Translate moving object w.r.t eye
1868 Point3D Objtrans = obj_pos-scenery.get_center();
1873 // rotate dynamic objects for lat,lon & alt and other motion about its axes
1876 sgMakeTransMat4( sgTRANS, bz[0],bz[1],bz[2]);
1878 sgVec3 ship_fwd,ship_rt,ship_up;
1879 sgSetVec3( ship_fwd, 1.0, 0.0, 0.0);//east,roll
1880 sgSetVec3( ship_rt, 0.0, 1.0, 0.0);//up,pitch
1881 sgSetVec3( ship_up, 0.0, 0.0, 1.0); //north,yaw
1883 sgMat4 sgROT_lon, sgROT_lat, sgROT_hdg, sgROT_pitch, sgROT_roll;
1884 sgMakeRotMat4( sgROT_lon, obj_lon[m]*SGD_RADIANS_TO_DEGREES, ship_up );
1885 sgMakeRotMat4( sgROT_lat, 90-obj_latgc*SGD_RADIANS_TO_DEGREES, ship_rt );
1886 sgMakeRotMat4( sgROT_hdg, 180.0, ship_up );
1887 sgMakeRotMat4( sgROT_pitch, obj_pitch[m], ship_rt );
1888 sgMakeRotMat4( sgROT_roll, obj_roll[m], ship_fwd );
1891 sgCopyMat4( sgTUX, sgROT_hdg );
1892 sgPostMultMat4( sgTUX, sgROT_pitch );
1893 sgPostMultMat4( sgTUX, sgROT_roll );
1894 sgPostMultMat4( sgTUX, sgROT_lat );
1895 sgPostMultMat4( sgTUX, sgROT_lon );
1896 sgPostMultMat4( sgTUX, sgTRANS );
1899 sgSetCoord(&shippos, sgTUX );
1900 ship_pos[m]->setTransform( &shippos );
1901 // temporary hack for deck lights - ultimately should move to PLib (when ??)
1903 if (lightpoints_transform) {
1904 lightpoints_transform->setTransform( &shippos );
1905 float sun_angle = cur_light_params.sun_angle * SGD_RADIANS_TO_DEGREES;
1906 if ( sun_angle > 89 ) {
1907 lightpoints_brightness->select(0x01);
1909 lightpoints_brightness->select(0x00);
1918 sgXformPnt3( rp, rway_ols, sgTUX );
1919 vp = globals->get_current_view()->get_view_pos();
1920 to[0] = rp[0]-vp[0];
1921 to[1] = rp[1]-vp[1];
1922 to[2] = rp[2]-vp[2];
1923 float dist = sgLengthVec3( to );
1924 alt = (current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER)-rway_ols[2];
1926 elev = asin(alt/dist)*SGD_RADIANS_TO_DEGREES;
1928 ref_elev = elev - 3.75; // +ve above, -ve below
1932 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1933 // if (ref_elev > 0.51) sel = 0x21;
1934 // if ((ref_elev <= 0.51) & (ref_elev > 0.17)) sel = 0x22;
1935 // if ((ref_elev <= 0.17) & (ref_elev >= -0.17)) sel = 0x24;
1936 // if ((ref_elev < -0.17) & (ref_elev >= -0.51)) sel = 0x28;
1937 // if (ref_elev < -0.51) sel = 0x30;
1938 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1939 dummy_tile->lightmaps_sequence->select(sel);
1942 sgCopyVec3 (up, ship_up);
1944 sgScaleVec3 (up, 4.0*ref_elev*dist/750.0);
1946 sgScaleVec3 (up, 4.0*ref_elev);
1947 dummy_tile->ols_transform->setTransform(up);
1948 //cout << "ref_elev " << ref_elev << endl;
1950 // end hack for deck lights
1953 if ( ship_sel != NULL ) {
1954 ship_sel->select(0xFFFFFFFE); // first object is ownship, added to acmodel
1958 // $$$ end - added VS Renganathan, 15 Oct 2K
1959 // added Venky , 12 Nov 2K