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>
38 #include <osg/GraphicsContext>
39 #include <osgDB/Registry>
42 #include <simgear/scene/model/modellib.hxx>
43 #include <simgear/scene/material/matlib.hxx>
44 #include <simgear/props/AtomicChangeListener.hxx>
45 #include <simgear/props/props.hxx>
46 #include <simgear/timing/sg_time.hxx>
47 #include <simgear/magvar/magvar.hxx>
48 #include <simgear/io/raw_socket.hxx>
49 #include <simgear/scene/tsync/terrasync.hxx>
50 #include <simgear/math/SGMath.hxx>
51 #include <simgear/math/sg_random.h>
53 #include <Aircraft/controls.hxx>
54 #include <Model/panelnode.hxx>
55 #include <Scenery/scenery.hxx>
56 #include <Scenery/tilemgr.hxx>
57 #include <Sound/soundmanager.hxx>
58 #include <Time/TimeManager.hxx>
60 #include <Viewer/CameraGroup.hxx>
61 #include <Viewer/WindowSystemAdapter.hxx>
62 #include <Viewer/splash.hxx>
63 #include <Viewer/renderer.hxx>
65 #include "fg_commands.hxx"
69 #include "fg_init.hxx"
71 #include "fg_props.hxx"
73 using namespace flightgear;
78 // Specify our current idle function state. This is used to run all
79 // our initializations out of the idle callback so that we can get a
80 // splash screen up and running right away.
83 // The atexit() function handler should know when the graphical subsystem
85 extern int _bootstrap_OSInit;
88 static void fgLoadInitialScenery()
90 static SGPropertyNode_ptr scenery_loaded
91 = fgGetNode("sim/sceneryloaded", true);
93 if (!scenery_loaded->getBoolValue())
95 if (globals->get_tile_mgr()->isSceneryLoaded()
96 && fgGetBool("sim/fdm-initialized")) {
97 fgSetBool("sim/sceneryloaded",true);
102 fgSplashProgress("loading scenery");
103 // be nice to loader threads while waiting for initial scenery, reduce to 2fps
104 SGTimeStamp::sleepForMSec(500);
109 // What should we do when we have nothing else to do? Let's get ready
110 // for the next move and update the display?
111 static void fgMainLoop( void )
113 static SGPropertyNode_ptr frame_signal
114 = fgGetNode("/sim/signals/frame", true);
116 frame_signal->fireValueChanged();
118 SG_LOG( SG_GENERAL, SG_DEBUG, "Running Main Loop");
119 SG_LOG( SG_GENERAL, SG_DEBUG, "======= ==== ====");
121 // compute simulated time (allowing for pause, warp, etc) and
123 double sim_dt, real_dt;
124 TimeManager* timeMgr = (TimeManager*) globals->get_subsystem("time");
125 timeMgr->computeTimeDeltas(sim_dt, real_dt);
127 // update magvar model
128 globals->get_mag()->update( globals->get_aircraft_position(),
129 globals->get_time_params()->getJD() );
131 // update all subsystems
132 globals->get_subsystem_mgr()->update(sim_dt);
134 // END Tile Manager updates
135 fgLoadInitialScenery();
137 simgear::AtomicChangeListener::fireChangeListeners();
139 SG_LOG( SG_GENERAL, SG_DEBUG, "" );
142 // Operation for querying OpenGL parameters. This must be done in a
143 // valid OpenGL context, potentially in another thread.
146 struct GeneralInitOperation : public GraphicsContextOperation
148 GeneralInitOperation()
149 : GraphicsContextOperation(std::string("General init"))
152 void run(osg::GraphicsContext* gc)
154 SGPropertyNode* simRendering = fgGetNode("/sim/rendering");
156 simRendering->setStringValue("gl-vendor", (char*) glGetString(GL_VENDOR));
157 SG_LOG( SG_GENERAL, SG_INFO, glGetString(GL_VENDOR));
159 simRendering->setStringValue("gl-renderer", (char*) glGetString(GL_RENDERER));
160 SG_LOG( SG_GENERAL, SG_INFO, glGetString(GL_RENDERER));
162 simRendering->setStringValue("gl-version", (char*) glGetString(GL_VERSION));
163 SG_LOG( SG_GENERAL, SG_INFO, glGetString(GL_VERSION));
166 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
167 simRendering->setIntValue("max-texture-size", tmp);
169 glGetIntegerv( GL_DEPTH_BITS, &tmp );
170 simRendering->setIntValue("depth-buffer-bits", tmp);
176 // This is the top level master main function that is registered as
179 // The first few passes take care of initialization things (a couple
180 // per pass) and once everything has been initialized fgMainLoop from
183 static void fgIdleFunction ( void ) {
184 static osg::ref_ptr<GeneralInitOperation> genOp;
185 if ( idle_state == 0 ) {
187 // Pick some window on which to do queries.
188 // XXX Perhaps all this graphics initialization code should be
189 // moved to renderer.cxx?
190 genOp = new GeneralInitOperation;
191 osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
192 WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
193 osg::GraphicsContext* gc = 0;
195 gc = guiCamera->getGraphicsContext();
197 gc->add(genOp.get());
199 wsa->windows[0]->gc->add(genOp.get());
202 } else if ( idle_state == 1 ) {
204 if (!genOp->isFinished())
208 if (!guiFinishInit())
211 fgSplashProgress("loading aircraft list");
213 } else if ( idle_state == 2 ) {
215 fgSplashProgress("loading navigation data");
217 } else if ( idle_state == 3 ) {
221 fgSplashProgress("initializing scenery system");
223 } else if ( idle_state == 4 ) {
225 // based on the requested presets, calculate the true starting
228 fgInitTowerLocationListener();
230 TimeManager* t = new TimeManager;
231 globals->add_subsystem("time", t, SGSubsystemMgr::INIT);
232 t->init(); // need to init now, not during initSubsystems
234 // Do some quick general initializations
235 if( !fgInitGeneral()) {
236 SG_LOG( SG_GENERAL, SG_ALERT,
237 "General initialization failed ..." );
241 ////////////////////////////////////////////////////////////////////
242 // Initialize the property-based built-in commands
243 ////////////////////////////////////////////////////////////////////
246 ////////////////////////////////////////////////////////////////////
247 // Initialize the material manager
248 ////////////////////////////////////////////////////////////////////
249 globals->set_matlib( new SGMaterialLib );
250 simgear::SGModelLib::init(globals->get_fg_root(), globals->get_props());
251 simgear::SGModelLib::setPanelFunc(FGPanelNode::load);
253 ////////////////////////////////////////////////////////////////////
254 // Initialize the TG scenery subsystem.
255 ////////////////////////////////////////////////////////////////////
256 simgear::SGTerraSync* terra_sync = new simgear::SGTerraSync(globals->get_props());
257 globals->add_subsystem("terrasync", terra_sync);
258 globals->set_scenery( new FGScenery );
259 globals->get_scenery()->init();
260 globals->get_scenery()->bind();
261 globals->set_tile_mgr( new FGTileMgr );
263 fgSplashProgress("loading aircraft");
265 } else if ( idle_state == 5 ) {
268 fgSplashProgress("initializing sky elements");
270 } else if ( idle_state == 6 ) {
273 // Initialize MagVar model
274 SGMagVar *magvar = new SGMagVar();
275 globals->set_mag( magvar );
278 // kludge to initialize mag compass
279 // (should only be done for in-flight
281 // update magvar model
282 globals->get_mag()->update( fgGetDouble("/position/longitude-deg")
283 * SGD_DEGREES_TO_RADIANS,
284 fgGetDouble("/position/latitude-deg")
285 * SGD_DEGREES_TO_RADIANS,
286 fgGetDouble("/position/altitude-ft")
288 globals->get_time_params()->getJD() );
290 fgSplashProgress("initializing subsystems");
292 } else if ( idle_state == 7 ) {
294 // Initialize audio support
295 #ifdef ENABLE_AUDIO_SUPPORT
297 // Start the intro music
298 if ( fgGetBool("/sim/startup/intro-music") ) {
299 SGPath mp3file( globals->get_fg_root() );
300 mp3file.append( "Sounds/intro.mp3" );
302 SG_LOG( SG_GENERAL, SG_INFO,
303 "Starting intro music: " << mp3file.str() );
305 # if defined( __CYGWIN__ )
306 string command = "start /m `cygpath -w " + mp3file.str() + "`";
307 # elif defined( _WIN32 )
308 string command = "start /m " + mp3file.str();
310 string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
313 if (0 != system ( command.c_str() ))
315 SG_LOG( SG_SOUND, SG_WARN,
316 "Failed to play mp3 file " << mp3file.str() << ". Maybe mp3 player is not installed." );
320 // This is the top level init routine which calls all the
321 // other subsystem initialization routines. If you are adding
322 // a subsystem to flightgear, its initialization call should be
323 // located in this routine.
324 if( !fgInitSubsystems()) {
325 SG_LOG( SG_GENERAL, SG_ALERT,
326 "Subsystem initialization failed ..." );
331 // ugly hack for automatic runway selection on startup based on
332 // metar data. Makes startup.nas obsolete and guarantees the same
333 // runway selection as for AI traffic. However, this code belongs to
334 // somewhere(?) else - if I only new where...
335 if( true == fgGetBool( "/environment/metar/valid" ) ) {
336 SG_LOG(SG_ENVIRONMENT, SG_INFO,
337 "Using METAR for runway selection: '" << fgGetString("/environment/metar/data") << "'" );
338 // the realwx_ctrl fetches metar in the foreground on init,
339 // If it was able to fetch a metar or one was given on the commandline,
340 // the valid flag is set here, otherwise it is false
341 double hdg = fgGetDouble( "/environment/metar/base-wind-dir-deg", 9999.0 );
342 string apt = fgGetString( "/sim/startup/options/airport" );
343 string rwy = fgGetString( "/sim/startup/options/runway" );
344 double strthdg = fgGetDouble( "/sim/startup/options/heading-deg", 9999.0 );
345 string parkpos = fgGetString( "/sim/presets/parkpos" );
346 bool onground = fgGetBool( "/sim/presets/onground", false );
347 // don't check for wind-speed < 1kt, this belongs to the runway-selection code
348 // the other logic is taken from former startup.nas
349 if( hdg < 360.0 && apt.length() > 0 && strthdg > 360.0 && rwy.length() == 0 && onground && parkpos.length() == 0 ) {
350 extern bool fgSetPosFromAirportIDandHdg( const string& id, double tgt_hdg );
351 fgSetPosFromAirportIDandHdg( apt, hdg );
354 SG_LOG(SG_ENVIRONMENT, SG_INFO,
355 "No METAR available to pick active runway" );
358 fgSplashProgress("initializing graphics engine");
360 } else if ( idle_state == 8 ) {
363 // setup OpenGL view parameters
364 globals->get_renderer()->setupView();
366 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
367 fgGetInt("/sim/startup/ysize") );
369 int session = fgGetInt("/sim/session",0);
371 fgSetInt("/sim/session",session);
374 if ( idle_state == 1000 ) {
375 // We've finished all our initialization steps, from now on we
376 // run the main loop.
377 fgSetBool("sim/sceneryloaded", false);
378 fgRegisterIdleHandler( fgMainLoop );
382 static void upper_case_property(const char *name)
384 using namespace simgear;
385 SGPropertyNode *p = fgGetNode(name, false);
387 p = fgGetNode(name, true);
388 p->setStringValue("");
390 props::Type t = p->getType();
391 if (t == props::NONE || t == props::UNSPECIFIED)
392 p->setStringValue("");
394 assert(t == props::STRING);
396 p->addChangeListener(new FGMakeUpperCase);
400 // Main top level initialization
401 int fgMainInit( int argc, char **argv ) {
403 // set default log levels
404 sglog().setLogLevels( SG_ALL, SG_ALERT );
407 #ifdef FLIGHTGEAR_VERSION
408 version = FLIGHTGEAR_VERSION;
410 version = "unknown version";
412 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
414 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << std::endl );
416 // Allocate global data structures. This needs to happen before
417 // we parse command line options
419 globals = new FGGlobals;
421 // seed the random number generator
424 FGControls *controls = new FGControls;
425 globals->set_controls( controls );
427 string_list *col = new string_list;
428 globals->set_channel_options_list( col );
430 fgValidatePath("", false); // initialize static variables
431 upper_case_property("/sim/presets/airport-id");
432 upper_case_property("/sim/presets/runway");
433 upper_case_property("/sim/tower/airport-id");
434 upper_case_property("/autopilot/route-manager/input");
436 // Load the configuration parameters. (Command line options
437 // override config file options. Config file options override
439 if ( !fgInitConfig(argc, argv) ) {
440 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
444 // Initialize the Window/Graphics environment.
445 fgOSInit(&argc, argv);
448 fgRegisterIdleHandler( &fgIdleFunction );
450 // Initialize sockets (WinSock needs this)
451 simgear::Socket::initSockets();
453 // Clouds3D requires an alpha channel
454 fgOSOpenWindow(true /* request stencil buffer */);
456 // Initialize the splash screen right away
460 // pass control off to the master event handler
461 int result = fgOSMainLoop();
463 // clean up here; ensure we null globals to avoid
464 // confusing the atexit() handler