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>
33 #include <osg/GraphicsContext>
34 #include <osgDB/Registry>
37 #include <simgear/canvas/VGInitOperation.hxx>
38 #include <simgear/scene/model/modellib.hxx>
39 #include <simgear/scene/material/matlib.hxx>
40 #include <simgear/props/AtomicChangeListener.hxx>
41 #include <simgear/props/props.hxx>
42 #include <simgear/timing/sg_time.hxx>
43 #include <simgear/io/raw_socket.hxx>
44 #include <simgear/scene/tsync/terrasync.hxx>
45 #include <simgear/math/SGMath.hxx>
46 #include <simgear/math/sg_random.h>
48 #include <Model/panelnode.hxx>
49 #include <Scenery/scenery.hxx>
50 #include <Scenery/tilemgr.hxx>
51 #include <Sound/soundmanager.hxx>
52 #include <Time/TimeManager.hxx>
54 #include <Viewer/splash.hxx>
55 #include <Viewer/renderer.hxx>
56 #include <Viewer/WindowSystemAdapter.hxx>
57 #include <Navaids/NavDataCache.hxx>
59 #include "fg_commands.hxx"
63 #include "fg_init.hxx"
65 #include "fg_props.hxx"
66 #include "positioninit.hxx"
67 #include "subsystemFactory.hxx"
69 using namespace flightgear;
74 // The atexit() function handler should know when the graphical subsystem
76 extern int _bootstrap_OSInit;
78 // What should we do when we have nothing else to do? Let's get ready
79 // for the next move and update the display?
80 static void fgMainLoop( void )
82 static SGPropertyNode_ptr frame_signal
83 = fgGetNode("/sim/signals/frame", true);
85 frame_signal->fireValueChanged();
87 SG_LOG( SG_GENERAL, SG_DEBUG, "Running Main Loop");
88 SG_LOG( SG_GENERAL, SG_DEBUG, "======= ==== ====");
90 // compute simulated time (allowing for pause, warp, etc) and
92 double sim_dt, real_dt;
93 static TimeManager* timeMgr = (TimeManager*) globals->get_subsystem("time");
94 timeMgr->computeTimeDeltas(sim_dt, real_dt);
96 // update all subsystems
97 globals->get_subsystem_mgr()->update(sim_dt);
99 simgear::AtomicChangeListener::fireChangeListeners();
101 SG_LOG( SG_GENERAL, SG_DEBUG, "" );
105 // This is the top level master main function that is registered as
108 // The first few passes take care of initialization things (a couple
109 // per pass) and once everything has been initialized fgMainLoop from
112 static void fgIdleFunction ( void ) {
113 // Specify our current idle function state. This is used to run all
114 // our initializations out of the idle callback so that we can get a
115 // splash screen up and running right away.
116 static int idle_state = 0;
118 if ( idle_state == 0 ) {
122 fgSplashProgress("loading-aircraft-list");
125 } else if ( idle_state == 2 ) {
127 fgSplashProgress("loading-nav-dat");
129 } else if ( idle_state == 3 ) {
131 bool done = fgInitNav();
134 fgSplashProgress("init-scenery");
136 fgSplashProgress("loading-nav-dat");
139 } else if ( idle_state == 4 ) {
141 // based on the requested presets, calculate the true starting
143 flightgear::initPosition();
144 flightgear::initTowerLocationListener();
146 TimeManager* t = new TimeManager;
147 globals->add_subsystem("time", t, SGSubsystemMgr::INIT);
148 t->init(); // need to init now, not during initSubsystems
150 // Do some quick general initializations
151 if( !fgInitGeneral()) {
152 SG_LOG( SG_GENERAL, SG_ALERT,
153 "General initialization failed ..." );
157 ////////////////////////////////////////////////////////////////////
158 // Initialize the property-based built-in commands
159 ////////////////////////////////////////////////////////////////////
162 flightgear::registerSubsystemCommands(globals->get_commands());
164 ////////////////////////////////////////////////////////////////////
165 // Initialize the material manager
166 ////////////////////////////////////////////////////////////////////
167 globals->set_matlib( new SGMaterialLib );
168 simgear::SGModelLib::init(globals->get_fg_root(), globals->get_props());
169 simgear::SGModelLib::setPanelFunc(FGPanelNode::load);
171 ////////////////////////////////////////////////////////////////////
172 // Initialize the TG scenery subsystem.
173 ////////////////////////////////////////////////////////////////////
174 simgear::SGTerraSync* terra_sync = new simgear::SGTerraSync(globals->get_props());
175 globals->add_subsystem("terrasync", terra_sync);
176 globals->set_scenery( new FGScenery );
177 globals->get_scenery()->init();
178 globals->get_scenery()->bind();
179 globals->set_tile_mgr( new FGTileMgr );
181 fgSplashProgress("loading-aircraft");
183 } else if ( idle_state == 6 ) {
185 fgSplashProgress("creating-subsystems");
187 } else if ( idle_state == 7 ) {
191 fgCreateSubsystems();
192 SG_LOG(SG_GENERAL, SG_INFO, "Creating subsystems took:" << st.elapsedMSec());
193 fgSplashProgress("binding-subsystems");
195 } else if ( idle_state == 8 ) {
199 globals->get_subsystem_mgr()->bind();
200 SG_LOG(SG_GENERAL, SG_INFO, "Binding subsystems took:" << st.elapsedMSec());
202 fgSplashProgress("init-subsystems");
203 } else if ( idle_state == 9 ) {
204 SGSubsystem::InitStatus status = globals->get_subsystem_mgr()->incrementalInit();
205 if ( status == SGSubsystem::INIT_DONE) {
207 fgSplashProgress("finishing-subsystems");
209 fgSplashProgress("init-subsystems");
212 } else if ( idle_state == 10 ) {
214 fgPostInitSubsystems();
217 // ugly hack for automatic runway selection on startup based on
218 // metar data. Makes startup.nas obsolete and guarantees the same
219 // runway selection as for AI traffic. However, this code belongs to
220 // somewhere(?) else - if I only new where...
221 if( true == fgGetBool( "/environment/metar/valid" ) ) {
222 SG_LOG(SG_ENVIRONMENT, SG_INFO,
223 "Using METAR for runway selection: '" << fgGetString("/environment/metar/data") << "'" );
224 // the realwx_ctrl fetches metar in the foreground on init,
225 // If it was able to fetch a metar or one was given on the commandline,
226 // the valid flag is set here, otherwise it is false
227 double hdg = fgGetDouble( "/environment/metar/base-wind-dir-deg", 9999.0 );
228 string apt = fgGetString( "/sim/startup/options/airport" );
229 string rwy = fgGetString( "/sim/startup/options/runway" );
230 double strthdg = fgGetDouble( "/sim/startup/options/heading-deg", 9999.0 );
231 string parkpos = fgGetString( "/sim/presets/parkpos" );
232 bool onground = fgGetBool( "/sim/presets/onground", false );
233 // don't check for wind-speed < 1kt, this belongs to the runway-selection code
234 // the other logic is taken from former startup.nas
235 if( hdg < 360.0 && apt.length() > 0 && strthdg > 360.0 && rwy.length() == 0 && onground && parkpos.length() == 0 ) {
236 extern bool fgSetPosFromAirportIDandHdg( const string& id, double tgt_hdg );
237 flightgear::setPosFromAirportIDandHdg( apt, hdg );
240 SG_LOG(SG_ENVIRONMENT, SG_INFO,
241 "No METAR available to pick active runway" );
244 fgSplashProgress("init-graphics");
246 } else if ( idle_state == 900 ) {
249 // setup OpenGL view parameters
250 globals->get_renderer()->setupView();
252 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
253 fgGetInt("/sim/startup/ysize") );
254 WindowSystemAdapter::getWSA()->windows[0]->gc->add(
255 new simgear::canvas::VGInitOperation()
258 int session = fgGetInt("/sim/session",0);
260 fgSetInt("/sim/session",session);
263 if ( idle_state == 1000 ) {
264 // We've finished all our initialization steps, from now on we
265 // run the main loop.
266 fgSetBool("sim/sceneryloaded", false);
267 fgRegisterIdleHandler( fgMainLoop );
271 static void upper_case_property(const char *name)
273 using namespace simgear;
274 SGPropertyNode *p = fgGetNode(name, false);
276 p = fgGetNode(name, true);
277 p->setStringValue("");
279 props::Type t = p->getType();
280 if (t == props::NONE || t == props::UNSPECIFIED)
281 p->setStringValue("");
283 assert(t == props::STRING);
285 p->addChangeListener(new FGMakeUpperCase);
289 // Main top level initialization
290 int fgMainInit( int argc, char **argv ) {
292 // set default log levels
293 sglog().setLogLevels( SG_ALL, SG_ALERT );
296 #ifdef FLIGHTGEAR_VERSION
297 version = FLIGHTGEAR_VERSION;
299 version = "unknown version";
301 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
303 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << std::endl );
305 // Allocate global data structures. This needs to happen before
306 // we parse command line options
308 globals = new FGGlobals;
310 // seed the random number generator
313 string_list *col = new string_list;
314 globals->set_channel_options_list( col );
316 fgValidatePath("", false); // initialize static variables
317 upper_case_property("/sim/presets/airport-id");
318 upper_case_property("/sim/presets/runway");
319 upper_case_property("/sim/tower/airport-id");
320 upper_case_property("/autopilot/route-manager/input");
322 // Load the configuration parameters. (Command line options
323 // override config file options. Config file options override
325 if ( !fgInitConfig(argc, argv) ) {
326 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
330 // Initialize the Window/Graphics environment.
331 fgOSInit(&argc, argv);
334 fgRegisterIdleHandler( &fgIdleFunction );
336 // Initialize sockets (WinSock needs this)
337 simgear::Socket::initSockets();
339 // Clouds3D requires an alpha channel
340 fgOSOpenWindow(true /* request stencil buffer */);
342 // Initialize the splash screen right away
346 // pass control off to the master event handler
347 int result = fgOSMainLoop();
349 // clean up here; ensure we null globals to avoid
350 // confusing the atexit() handler
354 // delete the NavCache here. This will cause the destruction of many cached
355 // objects (eg, airports, navaids, runways).
356 delete flightgear::NavDataCache::instance();