1 // main.cxx -- top level sim routines
3 // Written by Curtis Olson, started May 1997.
5 // Copyright (C) 1997 - 2002 Curtis L. Olson - http://www.flightgear.org/~curt
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
28 #include <simgear/compiler.h>
30 #if defined(__linux__) && defined(__i386__)
31 # include <fpu_control.h>
35 #ifdef SG_MATH_EXCEPTION_CLASH
44 #include <plib/netSocket.h>
46 #include <simgear/props/props.hxx>
47 #include <simgear/timing/sg_time.hxx>
48 #include <simgear/math/sg_random.h>
51 #include <simgear/ephemeris/ephemeris.hxx>
52 #include <simgear/scene/model/modellib.hxx>
53 #include <simgear/scene/material/matlib.hxx>
54 #include <simgear/scene/model/animation.hxx>
55 #include <simgear/scene/sky/sky.hxx>
56 #include <Time/light.hxx>
57 #include <Include/general.hxx>
58 #include <Aircraft/replay.hxx>
59 #include <Cockpit/cockpit.hxx>
60 #include <Cockpit/hud.hxx>
61 #include <Model/panelnode.hxx>
62 #include <Model/modelmgr.hxx>
63 #include <Model/acmodel.hxx>
64 #include <Scenery/scenery.hxx>
65 #include <Scenery/tilemgr.hxx>
66 #include <Sound/beacon.hxx>
67 #include <Sound/morse.hxx>
68 #include <FDM/flight.hxx>
69 #include <ATC/ATCmgr.hxx>
70 #include <ATC/AIMgr.hxx>
71 #include <Time/tmp.hxx>
72 #include <Time/fg_timer.hxx>
73 #include <Environment/environment_mgr.hxx>
74 #include <GUI/new_gui.hxx>
75 #include <MultiPlayer/multiplaymgr.hxx>
77 #include "fg_commands.hxx"
79 #include "renderer.hxx"
84 static double real_delta_time_sec = 0.0;
85 double delta_time_sec = 0.0;
86 extern float init_volume;
90 # include <console.h> // -dw- for command line dialog
93 // This is a record containing a bit of global housekeeping information
96 // Specify our current idle function state. This is used to run all
97 // our initializations out of the idle callback so that we can get a
98 // splash screen up and running right away.
100 long global_multi_loop;
102 SGTimeStamp last_time_stamp;
103 SGTimeStamp current_time_stamp;
105 // The atexit() function handler should know when the graphical subsystem
107 extern int _bootstrap_OSInit;
111 // Update internal time dependent calculations (i.e. flight model)
112 // FIXME: this distinction is obsolete; all subsystems now get delta
114 void fgUpdateTimeDepCalcs() {
115 static bool inited = false;
117 static const SGPropertyNode *replay_state
118 = fgGetNode( "/sim/freeze/replay-state", true );
119 static SGPropertyNode *replay_time
120 = fgGetNode( "/sim/replay/time", true );
121 // static const SGPropertyNode *replay_end_time
122 // = fgGetNode( "/sim/replay/end-time", true );
124 //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
126 // Initialize the FDM here if it hasn't been and if we have a
127 // scenery elevation hit.
129 // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
130 // << " cur_elev = " << scenery.get_cur_elev() << endl;
132 if (!cur_fdm_state->get_inited()) {
133 // Check for scenery around the aircraft.
134 double lon = fgGetDouble("/sim/presets/longitude-deg");
135 double lat = fgGetDouble("/sim/presets/latitude-deg");
136 // We require just to have 50 meter scenery availabe around
139 if (globals->get_tile_mgr()->scenery_available(lat, lon, range)) {
140 SG_LOG(SG_FLIGHT,SG_INFO, "Finally initializing fdm");
141 cur_fdm_state->init();
142 if ( cur_fdm_state->get_bound() ) {
143 cur_fdm_state->unbind();
145 cur_fdm_state->bind();
149 // conceptually, the following block could be done for each fdm
151 if ( cur_fdm_state->get_inited() ) {
152 // we have been inited, and we are good to go ...
154 if ( replay_state->getIntValue() == 0 ) {
155 // replay off, run fdm
156 cur_fdm_state->update( delta_time_sec );
158 FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
159 r->replay( replay_time->getDoubleValue() );
160 if ( replay_state->getIntValue() == 1 ) {
162 replay_time->setDoubleValue( replay_time->getDoubleValue()
164 * fgGetInt("/sim/speed-up") ) );
165 } else if ( replay_state->getIntValue() == 2 ) {
166 // paused playback (don't advance replay time)
172 fgSetBool("/sim/signals/fdm-initialized", true);
176 // do nothing, fdm isn't inited yet
179 globals->get_model_mgr()->update(delta_time_sec);
180 globals->get_aircraft_model()->update(delta_time_sec);
182 // Update solar system
183 globals->get_ephem()->update( globals->get_time_params()->getMjd(),
184 globals->get_time_params()->getLst(),
185 cur_fdm_state->get_Latitude() );
190 void fgInitTimeDepCalcs( void ) {
195 static const double alt_adjust_ft = 3.758099;
196 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
199 // What should we do when we have nothing else to do? Let's get ready
200 // for the next move and update the display?
201 static void fgMainLoop( void ) {
202 int model_hz = fgGetInt("/sim/model-hz");
204 static SGConstPropertyNode_ptr longitude
205 = fgGetNode("/position/longitude-deg");
206 static SGConstPropertyNode_ptr latitude
207 = fgGetNode("/position/latitude-deg");
208 static SGConstPropertyNode_ptr altitude
209 = fgGetNode("/position/altitude-ft");
210 static SGConstPropertyNode_ptr clock_freeze
211 = fgGetNode("/sim/freeze/clock", true);
212 static SGConstPropertyNode_ptr cur_time_override
213 = fgGetNode("/sim/time/cur-time-override", true);
214 static SGConstPropertyNode_ptr max_simtime_per_frame
215 = fgGetNode("/sim/max-simtime-per-frame", true);
216 static SGPropertyNode_ptr frame_signal
217 = fgGetNode("/sim/signals/frame", true);
219 frame_signal->setBoolValue(true);
220 SGCloudLayer::enable_bump_mapping = fgGetBool("/sim/rendering/bump-mapping");
222 bool scenery_loaded = fgGetBool("sim/sceneryloaded");
223 bool wait_for_scenery = !(scenery_loaded || fgGetBool("sim/sceneryloaded-override"));
225 // Update the elapsed time.
226 static bool first_time = true;
228 last_time_stamp.stamp();
232 double throttle_hz = fgGetDouble("/sim/frame-rate-throttle-hz", 0.0);
233 if ( throttle_hz > 0.0 && !wait_for_scenery ) {
234 // optionally throttle the frame rate (to get consistent frame
235 // rates or reduce cpu usage.
237 double frame_us = 1000000.0 / throttle_hz;
239 #define FG_SLEEP_BASED_TIMING 1
240 #if defined(FG_SLEEP_BASED_TIMING)
241 // sleep based timing loop.
243 // Calling sleep, even usleep() on linux is less accurate than
244 // we like, but it does free up the cpu for other tasks during
245 // the sleep so it is desirable. Because of the way sleep()
246 // is implemented in consumer operating systems like windows
247 // and linux, you almost always sleep a little longer than the
250 // To combat the problem of sleeping too long, we calculate the
251 // desired wait time and shorten it by 2000us (2ms) to avoid
252 // [hopefully] over-sleep'ing. The 2ms value was arrived at
253 // via experimentation. We follow this up at the end with a
254 // simple busy-wait loop to get the final pause timing exactly
257 // Assuming we don't oversleep by more than 2000us, this
258 // should be a reasonable compromise between sleep based
259 // waiting, and busy waiting.
261 // sleep() will always overshoot by a bit so undersleep by
262 // 2000us in the hopes of never oversleeping.
264 if ( frame_us < 0.0 ) {
267 current_time_stamp.stamp();
269 double elapsed_us = current_time_stamp - last_time_stamp;
270 if ( elapsed_us < frame_us ) {
271 double requested_us = frame_us - elapsed_us;
272 ulMilliSecondSleep ( (int)(requested_us / 1000.0) ) ;
276 // busy wait timing loop.
278 // This yields the most accurate timing. If the previous
279 // ulMilliSecondSleep() call is omitted this will peg the cpu
280 // (which is just fine if FG is the only app you care about.)
281 current_time_stamp.stamp();
282 while ( current_time_stamp - last_time_stamp < frame_us ) {
283 current_time_stamp.stamp();
286 // run as fast as the app will go
287 current_time_stamp.stamp();
291 = double(current_time_stamp - last_time_stamp) / 1000000.0;
293 // Limit the time we need to spend in simulation loops
294 // That means, if the /sim/max-simtime-per-frame value is strictly positive
295 // you can limit the maximum amount of time you will do simulations for
296 // one frame to display. The cpu time spent in simulations code is roughly
297 // at least O(real_delta_time_sec). If this is (due to running debug
298 // builds or valgrind or something different blowing up execution times)
299 // larger than the real time you will no longer get any response
300 // from flightgear. This limits that effect. Just set to property from
301 // your .fgfsrc or commandline ...
302 double dtMax = max_simtime_per_frame->getDoubleValue();
303 if (0 < dtMax && dtMax < real_delta_time_sec)
304 real_delta_time_sec = dtMax;
306 // round the real time down to a multiple of 1/model-hz.
307 // this way all systems are updated the _same_ amount of dt.
309 static double rem = 0.0;
310 real_delta_time_sec += rem;
311 double hz = model_hz;
312 double nit = floor(real_delta_time_sec*hz);
313 rem = real_delta_time_sec - nit/hz;
314 real_delta_time_sec = nit/hz;
318 if (clock_freeze->getBoolValue() || wait_for_scenery) {
321 delta_time_sec = real_delta_time_sec;
323 last_time_stamp = current_time_stamp;
324 globals->inc_sim_time_sec( delta_time_sec );
326 // These are useful, especially for Nasal scripts.
327 fgSetDouble("/sim/time/delta-realtime-sec", real_delta_time_sec);
328 fgSetDouble("/sim/time/delta-sec", delta_time_sec);
330 static long remainder = 0;
332 #ifdef FANCY_FRAME_COUNTER
336 static time_t last_time = 0;
337 static int frames = 0;
338 #endif // FANCY_FRAME_COUNTER
340 SGTime *t = globals->get_time_params();
342 SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
343 SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
345 #if defined( ENABLE_PLIB_JOYSTICK )
346 // Read joystick and update control settings
347 // if ( fgGetString("/sim/control-mode") == "joystick" )
353 // Fix elevation. I'm just sticking this here for now, it should
354 // probably move eventually
356 /* printf("Before - ground = %.2f runway = %.2f alt = %.2f\n",
357 scenery.get_cur_elev(),
358 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
359 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
361 /* printf("Adjustment - ground = %.2f runway = %.2f alt = %.2f\n",
362 scenery.get_cur_elev(),
363 cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
364 cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
366 // cout << "Warp = " << globals->get_warp() << endl;
369 static bool last_clock_freeze = false;
371 if ( clock_freeze->getBoolValue() ) {
372 // clock freeze requested
373 if ( cur_time_override->getLongValue() == 0 ) {
374 fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
375 globals->set_warp( 0 );
378 // no clock freeze requested
379 if ( last_clock_freeze == true ) {
380 // clock just unfroze, let's set warp as the difference
381 // between frozen time and current time so we don't get a
382 // time jump (and corresponding sky object and lighting
384 globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
385 fgSetLong( "/sim/time/cur-time-override", 0 );
387 if ( globals->get_warp_delta() != 0 ) {
388 globals->inc_warp( globals->get_warp_delta() );
392 last_clock_freeze = clock_freeze->getBoolValue();
394 t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
395 latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
396 cur_time_override->getLongValue(),
397 globals->get_warp() );
399 if (globals->get_warp_delta() != 0) {
400 FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
404 // update magvar model
405 globals->get_mag()->update( longitude->getDoubleValue()
406 * SGD_DEGREES_TO_RADIANS,
407 latitude->getDoubleValue()
408 * SGD_DEGREES_TO_RADIANS,
409 altitude->getDoubleValue() * SG_FEET_TO_METER,
410 globals->get_time_params()->getJD() );
412 // Get elapsed time (in usec) for this past frame
413 elapsed = fgGetTimeInterval();
414 SG_LOG( SG_ALL, SG_DEBUG,
415 "Elapsed time interval is = " << elapsed
416 << ", previous remainder is = " << remainder );
418 // Calculate frame rate average
419 #ifdef FANCY_FRAME_COUNTER
420 /* old fps calculation */
424 for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
425 tmp = general.get_frame(i);
427 // printf("frame[%d] = %.2f\n", i, g->frames[i]);
428 general.set_frame(i+1,tmp);
430 tmp = 1000000.0 / (float)elapsed;
431 general.set_frame(0,tmp);
432 // printf("frame[0] = %.2f\n", general.frames[0]);
434 general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
435 // printf("ave = %.2f\n", general.frame_rate);
438 if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
439 general.set_frame_rate( frames );
440 fgSetInt("/sim/frame-rate", frames);
441 SG_LOG( SG_ALL, SG_DEBUG,
442 "--> Frame rate is = " << general.get_frame_rate() );
445 last_time = t->get_cur_time();
449 // Update any multiplayer's network queues, the AIMultiplayer
450 // implementation is an AI model and depends on that
451 globals->get_multiplayer_mgr()->Update();
454 if (fgGetBool("/sim/atc/enabled"))
455 globals->get_ATC_mgr()->update(delta_time_sec);
457 // Run the AI subsystem
458 // FIXME: run that also if we have multiplaying enabled since the
459 // multiplayer information is interpreted by an AI model
460 if (fgGetBool("/sim/ai-traffic/enabled"))
461 globals->get_AI_mgr()->update(delta_time_sec);
465 // Calculate model iterations needed for next frame
466 elapsed += remainder;
468 global_multi_loop = (long)(((double)elapsed * 0.000001) * model_hz );
469 remainder = elapsed - ( (global_multi_loop*1000000) / model_hz );
470 SG_LOG( SG_ALL, SG_DEBUG,
471 "Model iterations needed = " << global_multi_loop
472 << ", new remainder = " << remainder );
474 // chop max iterations to something reasonable if the sim was
475 // delayed for an excessive amount of time
476 if ( global_multi_loop > 2.0 * model_hz ) {
477 global_multi_loop = (int)(2.0 * model_hz );
482 if ( global_multi_loop > 0) {
483 // first run the flight model each frame until it is initialized
484 // then continue running each frame only after initial scenery load is complete.
485 fgUpdateTimeDepCalcs();
487 SG_LOG( SG_ALL, SG_DEBUG,
488 "Elapsed time is zero ... we're zinging" );
491 // Run audio scheduler
492 #ifdef ENABLE_AUDIO_SUPPORT
493 if ( globals->get_soundmgr()->is_working() ) {
494 globals->get_soundmgr()->update( delta_time_sec );
498 globals->get_subsystem_mgr()->update(delta_time_sec);
501 // Tile Manager updates - see if we need to load any new scenery tiles.
502 // this code ties together the fdm, viewer and scenery classes...
503 // we may want to move this to its own class at some point
505 double visibility_meters = fgGetDouble("/environment/visibility-m");
506 FGViewer *current_view = globals->get_current_view();
508 globals->get_tile_mgr()->prep_ssg_nodes( visibility_meters );
509 // update tile manager for view...
510 SGLocation *view_location = globals->get_current_view()->getSGLocation();
511 globals->get_tile_mgr()->update( view_location, visibility_meters );
513 double lon = view_location->getLongitude_deg();
514 double lat = view_location->getLatitude_deg();
515 double alt = view_location->getAltitudeASL_ft() * SG_FEET_TO_METER;
517 // check if we can reuse the groundcache for that purpose.
520 bool valid = cur_fdm_state->is_valid_m(&ref_time, pt.sg(), &r);
521 SGVec3d viewpos(globals->get_current_view()->get_view_pos());
522 if (valid && distSqr(viewpos, pt) < r*r) {
523 // Reuse the cache ...
525 = cur_fdm_state->get_groundlevel_m(lat*SGD_DEGREES_TO_RADIANS,
526 lon*SGD_DEGREES_TO_RADIANS,
528 view_location->set_cur_elev_m( lev );
530 // Do full intersection test.
532 if (globals->get_scenery()->get_elevation_m(lat, lon, alt+2, lev, 0))
533 view_location->set_cur_elev_m( lev );
535 view_location->set_cur_elev_m( -9999.0 );
539 // run Nasal's settimer() loops right before the view manager
540 globals->get_event_mgr()->update(delta_time_sec);
542 // update the view angle as late as possible, but before sound calculations
543 globals->get_viewmgr()->update(delta_time_sec);
545 // Do any I/O channel work that might need to be done (must come after viewmgr)
546 globals->get_io()->update(real_delta_time_sec);
548 #ifdef ENABLE_AUDIO_SUPPORT
549 // Right now we make a simplifying assumption that the primary
550 // aircraft is the source of all sounds and that all sounds are
551 // positioned in the aircraft base
553 static sgdVec3 last_visitor_pos = {0, 0, 0};
554 static sgdVec3 last_model_pos = {0, 0, 0};
556 // get the orientation
557 const SGQuatd view_or = current_view->getViewOrientation();
558 SGQuatd surf_or = SGQuatd::fromLonLatDeg(
559 current_view->getLongitude_deg(), current_view->getLatitude_deg());
560 SGQuatd model_or = SGQuatd::fromYawPitchRollDeg(
561 globals->get_aircraft_model()->get3DModel()->getHeadingDeg(),
562 globals->get_aircraft_model()->get3DModel()->getPitchDeg(),
563 globals->get_aircraft_model()->get3DModel()->getRollDeg());
565 // get the up and at vector in the aircraft base
566 // (ok, the up vector is a down vector, but the coordinates
567 // are finally calculated in a left hand system and openal
568 // lives in a right hand system. Therefore we need to pass
569 // the down vector to get correct stereo sound.)
570 SGVec3d sgv_up = model_or.rotateBack(
571 surf_or.rotateBack(view_or.rotate(SGVec3d(0, 1, 0))));
573 sgSetVec3(up, sgv_up[0], sgv_up[1], sgv_up[2]);
574 SGVec3d sgv_at = model_or.rotateBack(
575 surf_or.rotateBack(view_or.rotate(SGVec3d(0, 0, 1))));
577 sgSetVec3(at, sgv_at[0], sgv_at[1], sgv_at[2]);
579 // get the location data for the primary FDM (now hardcoded to ac model)...
580 SGLocation *acmodel_loc = NULL;
581 acmodel_loc = (SGLocation *)globals->
582 get_aircraft_model()->get3DModel()->getSGLocation();
584 // calculate speed of visitor and model
585 sgVec3 listener_vel, model_vel;
588 sgdVec3 sgdv3_null = {0, 0, 0};
590 sgdSubVec3( sgdv3_help,
591 last_visitor_pos, (double *)¤t_view->get_view_pos());
592 sgdAddVec3( last_visitor_pos, sgdv3_null, (double *)¤t_view->get_view_pos());
593 SGV3d_help = model_or.rotateBack(
594 surf_or.rotateBack(SGVec3d(sgdv3_help[0],
595 sgdv3_help[1], sgdv3_help[2])));
596 sgSetVec3( listener_vel, SGV3d_help[0], SGV3d_help[1], SGV3d_help[2]);
598 sgdSubVec3( sgdv3_help,
599 last_model_pos, acmodel_loc->get_absolute_view_pos());
600 sgdAddVec3( last_model_pos, sgdv3_null, acmodel_loc->get_absolute_view_pos());
601 SGV3d_help = model_or.rotateBack(
602 surf_or.rotateBack(SGVec3d(sgdv3_help[0],
603 sgdv3_help[1], sgdv3_help[2])));
604 sgSetVec3( model_vel, SGV3d_help[0], SGV3d_help[1], SGV3d_help[2]);
606 if (delta_time_sec > 0) {
607 sgScaleVec3( model_vel, 1 / delta_time_sec );
608 sgScaleVec3( listener_vel, 1 / delta_time_sec );
611 // checking, if the listener pos has moved suddenly
612 if (sgLengthVec3(listener_vel) > 1000)
614 // check if the relative speed model vs listener has moved suddenly, too
616 sgSubVec3(delta_vel, listener_vel, model_vel );
617 if (sgLengthVec3(delta_vel) > 1000)
618 sgSetVec3(listener_vel, model_vel[0], model_vel[1], model_vel[2] ); // a sane value
620 globals->get_soundmgr()->set_listener_vel( listener_vel );
623 globals->get_soundmgr()->set_listener_vel( listener_vel );
625 // set positional offset for sources
626 sgdVec3 dsource_pos_offset;
627 sgdSubVec3( dsource_pos_offset,
628 (double*) ¤t_view->get_view_pos(),
629 acmodel_loc->get_absolute_view_pos() );
630 SGVec3d sgv_dsource_pos_offset = model_or.rotateBack(
631 surf_or.rotateBack(SGVec3d(dsource_pos_offset[0],
632 dsource_pos_offset[1], dsource_pos_offset[2])));
634 sgVec3 source_pos_offset;
635 sgSetVec3(source_pos_offset, sgv_dsource_pos_offset[0],
636 sgv_dsource_pos_offset[1], sgv_dsource_pos_offset[2]);
638 globals->get_soundmgr()->set_source_pos_all( source_pos_offset );
641 for (int i = 0; i < 3; i++) {
642 orient[i] = sgv_at[i];
643 orient[i + 3] = sgv_up[i];
645 globals->get_soundmgr()->set_listener_orientation( orient );
648 // all sources are defined to be in the model
649 globals->get_soundmgr()->set_source_vel_all( model_vel );
651 // The listener is always positioned at the origin.
653 sgSetVec3( listener_pos, 0.0, 0.0, 0.0 );
654 globals->get_soundmgr()->set_listener_pos( listener_pos );
657 // END Tile Manager udpates
659 if (!scenery_loaded && globals->get_tile_mgr()->isSceneryLoaded()
660 && cur_fdm_state->get_inited()) {
661 fgSetBool("sim/sceneryloaded",true);
662 fgSetFloat("/sim/sound/volume", init_volume);
663 globals->get_soundmgr()->set_volume(init_volume);
668 SG_LOG( SG_ALL, SG_DEBUG, "" );
672 // This is the top level master main function that is registered as
675 // The first few passes take care of initialization things (a couple
676 // per pass) and once everything has been initialized fgMainLoop from
679 static void fgIdleFunction ( void ) {
680 // Some intialization requires a valid graphics context, in
681 // particular that of plib. Boo, hiss!
683 if ( idle_state == 0 ) {
686 // This seems to be the absolute earliest in the init sequence
687 // that these calls will return valid info. Too bad it's after
688 // we've already created and sized our window. :-(
689 general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
690 general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
691 general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
692 SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
695 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
696 general.set_glMaxTexSize( tmp );
697 SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
699 glGetIntegerv( GL_DEPTH_BITS, &tmp );
700 general.set_glDepthBits( tmp );
701 SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
703 // Initialize the user interface so that we can use fonts
707 } else if ( idle_state == 1 ) {
709 fgSplashProgress("reading aircraft list");
712 } else if ( idle_state == 2 ) {
714 // Read the list of available aircraft
717 // get the address of our OpenGL extensions
718 // if (SGIsOpenGLExtensionSupported("GL_EXT_point_parameters") ) {
719 // glPointParameterIsSupported = true;
720 // glPointParameterfPtr = (glPointParameterfProc)
721 // SGLookupFunction("glPointParameterfEXT");
722 // glPointParameterfvPtr = (glPointParameterfvProc)
723 // SGLookupFunction("glPointParameterfvEXT");
724 // } else if ( SGIsOpenGLExtensionSupported("GL_ARB_point_parameters") ) {
725 // glPointParameterIsSupported = true;
726 // glPointParameterfPtr = (glPointParameterfProc)
727 // SGLookupFunction("glPointParameterfARB");
728 // glPointParameterfvPtr = (glPointParameterfvProc)
729 // SGLookupFunction("glPointParameterfvARB");
731 // glPointParameterIsSupported = false;
733 fgSplashProgress("reading airport & navigation data");
736 } else if ( idle_state == 3 ) {
739 fgSplashProgress("setting up scenery");
742 } else if ( idle_state == 4 ) {
744 // based on the requested presets, calculate the true starting
747 fgInitTowerLocationListener();
749 SGTime *t = fgInitTime();
750 globals->set_time_params( t );
752 // Do some quick general initializations
753 if( !fgInitGeneral()) {
754 SG_LOG( SG_GENERAL, SG_ALERT,
755 "General initialization failed ..." );
759 ////////////////////////////////////////////////////////////////////
760 // Initialize the property-based built-in commands
761 ////////////////////////////////////////////////////////////////////
765 ////////////////////////////////////////////////////////////////////
766 // Initialize the material manager
767 ////////////////////////////////////////////////////////////////////
768 globals->set_matlib( new SGMaterialLib );
769 globals->set_model_lib(new SGModelLib);
772 ////////////////////////////////////////////////////////////////////
773 // Initialize the TG scenery subsystem.
774 ////////////////////////////////////////////////////////////////////
775 globals->set_scenery( new FGScenery );
776 globals->get_scenery()->init();
777 globals->get_scenery()->bind();
778 globals->set_tile_mgr( new FGTileMgr );
781 ////////////////////////////////////////////////////////////////////
782 // Initialize the general model subsystem.
783 ////////////////////////////////////////////////////////////////////
784 globals->set_model_mgr(new FGModelMgr);
785 globals->get_model_mgr()->init();
786 globals->get_model_mgr()->bind();
787 fgSplashProgress("loading aircraft");
790 } else if ( idle_state == 5 ) {
792 ////////////////////////////////////////////////////////////////////
793 // Initialize the 3D aircraft model subsystem (has a dependency on
794 // the scenery subsystem.)
795 ////////////////////////////////////////////////////////////////////
796 globals->set_aircraft_model(new FGAircraftModel);
797 globals->get_aircraft_model()->init();
798 globals->get_aircraft_model()->bind();
800 ////////////////////////////////////////////////////////////////////
801 // Initialize the view manager subsystem.
802 ////////////////////////////////////////////////////////////////////
803 FGViewMgr *viewmgr = new FGViewMgr;
804 globals->set_viewmgr( viewmgr );
807 fgSplashProgress("generating sky elements");
810 } else if ( idle_state == 6 ) {
812 // Initialize the sky
813 SGPath ephem_data_path( globals->get_fg_root() );
814 ephem_data_path.append( "Astro" );
815 SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
816 ephem->update( globals->get_time_params()->getMjd(),
817 globals->get_time_params()->getLst(),
819 globals->set_ephem( ephem );
821 // TODO: move to environment mgr
823 SGPath texture_path(globals->get_fg_root());
824 texture_path.append("Textures");
825 texture_path.append("Sky");
826 for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
827 SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
828 thesky->add_cloud_layer(layer);
831 SGPath sky_tex_path( globals->get_fg_root() );
832 sky_tex_path.append( "Textures" );
833 sky_tex_path.append( "Sky" );
834 thesky->texture_path( sky_tex_path.str() );
836 // The sun and moon diameters are scaled down numbers of the
837 // actual diameters. This was needed to fit both the sun and the
838 // moon within the distance to the far clip plane.
839 // Moon diameter: 3,476 kilometers
840 // Sun diameter: 1,390,000 kilometers
841 thesky->build( 80000.0, 80000.0,
843 globals->get_ephem()->getNumPlanets(),
844 globals->get_ephem()->getPlanets(),
845 globals->get_ephem()->getNumStars(),
846 globals->get_ephem()->getStars(),
847 fgGetNode("/environment", true));
849 // Initialize MagVar model
850 SGMagVar *magvar = new SGMagVar();
851 globals->set_mag( magvar );
854 // kludge to initialize mag compass
855 // (should only be done for in-flight
857 // update magvar model
858 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
859 * SGD_DEGREES_TO_RADIANS,
860 fgGetDouble("/position/latitude-deg")
861 * SGD_DEGREES_TO_RADIANS,
862 fgGetDouble("/position/altitude-ft")
864 globals->get_time_params()->getJD() );
865 double var = globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
866 fgSetDouble("/instrumentation/heading-indicator/offset-deg", -var);
867 fgSetDouble("/instrumentation/heading-indicator-fg/offset-deg", -var);
870 // airport = new ssgBranch;
871 // airport->setName( "Airport Lighting" );
872 // lighting->addKid( airport );
874 // build our custom render states
875 fgSplashProgress("initializing subsystems");
878 } else if ( idle_state == 7 ) {
880 // Initialize audio support
881 #ifdef ENABLE_AUDIO_SUPPORT
883 // Start the intro music
884 if ( fgGetBool("/sim/startup/intro-music") ) {
885 SGPath mp3file( globals->get_fg_root() );
886 mp3file.append( "Sounds/intro.mp3" );
888 SG_LOG( SG_GENERAL, SG_INFO,
889 "Starting intro music: " << mp3file.str() );
891 #if defined( __CYGWIN__ )
892 string command = "start /m `cygpath -w " + mp3file.str() + "`";
893 #elif defined( WIN32 )
894 string command = "start /m " + mp3file.str();
896 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
899 system ( command.c_str() );
903 // These are a few miscellaneous things that aren't really
904 // "subsystems" but still need to be initialized.
907 if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
908 grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
912 // This is the top level init routine which calls all the
913 // other subsystem initialization routines. If you are adding
914 // a subsystem to flightgear, its initialization call should be
915 // located in this routine.
916 if( !fgInitSubsystems()) {
917 SG_LOG( SG_GENERAL, SG_ALERT,
918 "Subsystem initialization failed ..." );
921 fgSplashProgress("setting up time & renderer");
924 } else if ( idle_state == 8 ) {
926 // Initialize the time offset (warp) after fgInitSubsystem
927 // (which initializes the lighting interpolation tables.)
930 // setup OpenGL view parameters
931 globals->get_renderer()->init();
933 SG_LOG( SG_GENERAL, SG_INFO, "Panel visible = " << fgPanelVisible() );
934 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
935 fgGetInt("/sim/startup/ysize") );
937 fgSplashProgress("loading scenery objects");
941 if ( idle_state == 1000 ) {
942 // We've finished all our initialization steps, from now on we
943 // run the main loop.
944 fgSetBool("sim/sceneryloaded", false);
945 fgRegisterIdleHandler( fgMainLoop );
950 static void upper_case_property(const char *name)
952 SGPropertyNode *p = fgGetNode(name, false);
954 p = fgGetNode(name, true);
955 p->setStringValue("");
957 SGPropertyNode::Type t = p->getType();
958 if (t == SGPropertyNode::NONE || t == SGPropertyNode::UNSPECIFIED)
959 p->setStringValue("");
961 assert(t == SGPropertyNode::STRING);
963 p->addChangeListener(new FGMakeUpperCase);
967 // Main top level initialization
968 bool fgMainInit( int argc, char **argv ) {
970 #if defined( macintosh )
971 freopen ("stdout.txt", "w", stdout );
972 freopen ("stderr.txt", "w", stderr );
973 argc = ccommand( &argv );
976 // set default log levels
977 sglog().setLogLevels( SG_ALL, SG_ALERT );
980 #ifdef FLIGHTGEAR_VERSION
981 version = FLIGHTGEAR_VERSION;
983 version = "unknown version";
985 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
987 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << endl );
989 // Allocate global data structures. This needs to happen before
990 // we parse command line options
992 globals = new FGGlobals;
994 // seed the random number generator
997 FGControls *controls = new FGControls;
998 globals->set_controls( controls );
1000 string_list *col = new string_list;
1001 globals->set_channel_options_list( col );
1003 upper_case_property("/sim/presets/airport-id");
1004 upper_case_property("/sim/presets/runway");
1005 upper_case_property("/sim/tower/airport-id");
1007 // Scan the config file(s) and command line options to see if
1008 // fg_root was specified (ignore all other options for now)
1009 fgInitFGRoot(argc, argv);
1011 // Check for the correct base package version
1012 static char required_version[] = "1.0.0";
1013 string base_version = fgBasePackageVersion();
1014 if ( !(base_version == required_version) ) {
1015 // tell the operator how to use this application
1017 SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on windows
1018 cerr << endl << "Base package check failed ... " \
1019 << "Found version " << base_version << " at: " \
1020 << globals->get_fg_root() << endl;
1021 cerr << "Please upgrade to version: " << required_version << endl;
1023 cerr << "Hit a key to continue..." << endl;
1029 // Load the configuration parameters. (Command line options
1030 // override config file options. Config file options override
1032 if ( !fgInitConfig(argc, argv) ) {
1033 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
1037 // Initialize the Window/Graphics environment.
1038 #if !defined(__APPLE__) || defined(OSX_BUNDLE)
1039 // Mac OS X command line ("non-bundle") applications call this
1040 // from main(), in bootstrap.cxx. Andy doesn't know why, someone
1041 // feel free to add comments...
1042 fgOSInit(&argc, argv);
1043 _bootstrap_OSInit++;
1046 fgRegisterWindowResizeHandler( &FGRenderer::resize );
1047 fgRegisterIdleHandler( &fgIdleFunction );
1048 fgRegisterDrawHandler( &FGRenderer::update );
1050 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
1051 bool get_stencil_buffer = true;
1053 bool get_stencil_buffer = false;
1056 // Initialize plib net interface
1057 netInit( &argc, argv );
1059 // Clouds3D requires an alpha channel
1060 // clouds may require stencil buffer
1061 fgOSOpenWindow( fgGetInt("/sim/startup/xsize"),
1062 fgGetInt("/sim/startup/ysize"),
1063 fgGetInt("/sim/rendering/bits-per-pixel"),
1064 fgGetBool("/sim/rendering/clouds3d-enable"),
1066 fgGetBool("/sim/startup/fullscreen") );
1068 // Initialize the splash screen right away
1072 // pass control off to the master event handler
1075 // we never actually get here ... but to avoid compiler warnings,