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/io/raw_socket.hxx>
48 #include <simgear/scene/tsync/terrasync.hxx>
49 #include <simgear/math/SGMath.hxx>
50 #include <simgear/math/sg_random.h>
52 #include <Aircraft/controls.hxx>
53 #include <Model/panelnode.hxx>
54 #include <Scenery/scenery.hxx>
55 #include <Scenery/tilemgr.hxx>
56 #include <Sound/soundmanager.hxx>
57 #include <Time/TimeManager.hxx>
59 #include <Viewer/CameraGroup.hxx>
60 #include <Viewer/WindowSystemAdapter.hxx>
61 #include <Viewer/splash.hxx>
62 #include <Viewer/renderer.hxx>
63 #include <Navaids/NavDataCache.hxx>
65 #include "fg_commands.hxx"
69 #include "fg_init.hxx"
71 #include "fg_props.hxx"
72 #include "positioninit.hxx"
74 using namespace flightgear;
79 // The atexit() function handler should know when the graphical subsystem
81 extern int _bootstrap_OSInit;
83 // What should we do when we have nothing else to do? Let's get ready
84 // for the next move and update the display?
85 static void fgMainLoop( void )
87 static SGPropertyNode_ptr frame_signal
88 = fgGetNode("/sim/signals/frame", true);
90 frame_signal->fireValueChanged();
92 SG_LOG( SG_GENERAL, SG_DEBUG, "Running Main Loop");
93 SG_LOG( SG_GENERAL, SG_DEBUG, "======= ==== ====");
95 // compute simulated time (allowing for pause, warp, etc) and
97 double sim_dt, real_dt;
98 static TimeManager* timeMgr = (TimeManager*) globals->get_subsystem("time");
99 timeMgr->computeTimeDeltas(sim_dt, real_dt);
101 // update all subsystems
102 globals->get_subsystem_mgr()->update(sim_dt);
104 simgear::AtomicChangeListener::fireChangeListeners();
106 SG_LOG( SG_GENERAL, SG_DEBUG, "" );
109 // Operation for querying OpenGL parameters. This must be done in a
110 // valid OpenGL context, potentially in another thread.
113 struct GeneralInitOperation : public GraphicsContextOperation
115 GeneralInitOperation()
116 : GraphicsContextOperation(std::string("General init"))
119 void run(osg::GraphicsContext* gc)
121 SGPropertyNode* simRendering = fgGetNode("/sim/rendering");
123 simRendering->setStringValue("gl-vendor", (char*) glGetString(GL_VENDOR));
124 SG_LOG( SG_GENERAL, SG_INFO, glGetString(GL_VENDOR));
126 simRendering->setStringValue("gl-renderer", (char*) glGetString(GL_RENDERER));
127 SG_LOG( SG_GENERAL, SG_INFO, glGetString(GL_RENDERER));
129 simRendering->setStringValue("gl-version", (char*) glGetString(GL_VERSION));
130 SG_LOG( SG_GENERAL, SG_INFO, glGetString(GL_VERSION));
132 simRendering->setStringValue("gl-shading-language-version", (char*) glGetString(GL_SHADING_LANGUAGE_VERSION));
133 SG_LOG( SG_GENERAL, SG_INFO, glGetString(GL_SHADING_LANGUAGE_VERSION));
136 glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
137 simRendering->setIntValue("max-texture-size", tmp);
139 glGetIntegerv( GL_DEPTH_BITS, &tmp );
140 simRendering->setIntValue("depth-buffer-bits", tmp);
146 // This is the top level master main function that is registered as
149 // The first few passes take care of initialization things (a couple
150 // per pass) and once everything has been initialized fgMainLoop from
153 static void fgIdleFunction ( void ) {
154 // Specify our current idle function state. This is used to run all
155 // our initializations out of the idle callback so that we can get a
156 // splash screen up and running right away.
157 static int idle_state = 0;
159 static osg::ref_ptr<GeneralInitOperation> genOp;
160 if ( idle_state == 0 ) {
162 // Pick some window on which to do queries.
163 // XXX Perhaps all this graphics initialization code should be
164 // moved to renderer.cxx?
165 genOp = new GeneralInitOperation;
166 osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
167 WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
168 osg::GraphicsContext* gc = 0;
170 gc = guiCamera->getGraphicsContext();
172 gc->add(genOp.get());
174 wsa->windows[0]->gc->add(genOp.get());
177 } else if ( idle_state == 1 ) {
179 if (!genOp->isFinished())
183 if (!guiFinishInit())
186 fgSplashProgress("loading-aircraft-list");
188 } else if ( idle_state == 2 ) {
190 fgSplashProgress("loading-nav-data");
192 } else if ( idle_state == 3 ) {
196 fgSplashProgress("init-scenery");
198 } else if ( idle_state == 4 ) {
200 // based on the requested presets, calculate the true starting
202 flightgear::initPosition();
203 flightgear::initTowerLocationListener();
205 TimeManager* t = new TimeManager;
206 globals->add_subsystem("time", t, SGSubsystemMgr::INIT);
207 t->init(); // need to init now, not during initSubsystems
209 // Do some quick general initializations
210 if( !fgInitGeneral()) {
211 SG_LOG( SG_GENERAL, SG_ALERT,
212 "General initialization failed ..." );
216 ////////////////////////////////////////////////////////////////////
217 // Initialize the property-based built-in commands
218 ////////////////////////////////////////////////////////////////////
221 ////////////////////////////////////////////////////////////////////
222 // Initialize the material manager
223 ////////////////////////////////////////////////////////////////////
224 globals->set_matlib( new SGMaterialLib );
225 simgear::SGModelLib::init(globals->get_fg_root(), globals->get_props());
226 simgear::SGModelLib::setPanelFunc(FGPanelNode::load);
228 ////////////////////////////////////////////////////////////////////
229 // Initialize the TG scenery subsystem.
230 ////////////////////////////////////////////////////////////////////
231 simgear::SGTerraSync* terra_sync = new simgear::SGTerraSync(globals->get_props());
232 globals->add_subsystem("terrasync", terra_sync);
233 globals->set_scenery( new FGScenery );
234 globals->get_scenery()->init();
235 globals->get_scenery()->bind();
236 globals->set_tile_mgr( new FGTileMgr );
238 fgSplashProgress("loading-aircraft");
240 } else if ( idle_state == 6 ) {
242 fgSplashProgress("creating-subsystems");
244 } else if ( idle_state == 7 ) {
248 fgCreateSubsystems();
249 SG_LOG(SG_GENERAL, SG_INFO, "Creating subsystems took:" << st.elapsedMSec());
250 fgSplashProgress("binding-subsystems");
252 } else if ( idle_state == 8 ) {
256 globals->get_subsystem_mgr()->bind();
257 SG_LOG(SG_GENERAL, SG_INFO, "Binding subsystems took:" << st.elapsedMSec());
259 fgSplashProgress("init-subsystems");
260 } else if ( idle_state == 9 ) {
261 SGSubsystem::InitStatus status = globals->get_subsystem_mgr()->incrementalInit();
262 if ( status == SGSubsystem::INIT_DONE) {
264 fgSplashProgress("finishing-subsystems");
266 fgSplashProgress("init-subsystems");
269 } else if ( idle_state == 10 ) {
271 fgPostInitSubsystems();
274 // ugly hack for automatic runway selection on startup based on
275 // metar data. Makes startup.nas obsolete and guarantees the same
276 // runway selection as for AI traffic. However, this code belongs to
277 // somewhere(?) else - if I only new where...
278 if( true == fgGetBool( "/environment/metar/valid" ) ) {
279 SG_LOG(SG_ENVIRONMENT, SG_INFO,
280 "Using METAR for runway selection: '" << fgGetString("/environment/metar/data") << "'" );
281 // the realwx_ctrl fetches metar in the foreground on init,
282 // If it was able to fetch a metar or one was given on the commandline,
283 // the valid flag is set here, otherwise it is false
284 double hdg = fgGetDouble( "/environment/metar/base-wind-dir-deg", 9999.0 );
285 string apt = fgGetString( "/sim/startup/options/airport" );
286 string rwy = fgGetString( "/sim/startup/options/runway" );
287 double strthdg = fgGetDouble( "/sim/startup/options/heading-deg", 9999.0 );
288 string parkpos = fgGetString( "/sim/presets/parkpos" );
289 bool onground = fgGetBool( "/sim/presets/onground", false );
290 // don't check for wind-speed < 1kt, this belongs to the runway-selection code
291 // the other logic is taken from former startup.nas
292 if( hdg < 360.0 && apt.length() > 0 && strthdg > 360.0 && rwy.length() == 0 && onground && parkpos.length() == 0 ) {
293 extern bool fgSetPosFromAirportIDandHdg( const string& id, double tgt_hdg );
294 flightgear::setPosFromAirportIDandHdg( apt, hdg );
297 SG_LOG(SG_ENVIRONMENT, SG_INFO,
298 "No METAR available to pick active runway" );
301 fgSplashProgress("init-graphics");
303 } else if ( idle_state == 900 ) {
306 // setup OpenGL view parameters
307 globals->get_renderer()->setupView();
309 globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
310 fgGetInt("/sim/startup/ysize") );
312 int session = fgGetInt("/sim/session",0);
314 fgSetInt("/sim/session",session);
317 if ( idle_state == 1000 ) {
318 // We've finished all our initialization steps, from now on we
319 // run the main loop.
320 fgSetBool("sim/sceneryloaded", false);
321 fgRegisterIdleHandler( fgMainLoop );
325 static void upper_case_property(const char *name)
327 using namespace simgear;
328 SGPropertyNode *p = fgGetNode(name, false);
330 p = fgGetNode(name, true);
331 p->setStringValue("");
333 props::Type t = p->getType();
334 if (t == props::NONE || t == props::UNSPECIFIED)
335 p->setStringValue("");
337 assert(t == props::STRING);
339 p->addChangeListener(new FGMakeUpperCase);
343 // Main top level initialization
344 int fgMainInit( int argc, char **argv ) {
346 // set default log levels
347 sglog().setLogLevels( SG_ALL, SG_ALERT );
350 #ifdef FLIGHTGEAR_VERSION
351 version = FLIGHTGEAR_VERSION;
353 version = "unknown version";
355 SG_LOG( SG_GENERAL, SG_INFO, "FlightGear: Version "
357 SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << std::endl );
359 // Allocate global data structures. This needs to happen before
360 // we parse command line options
362 globals = new FGGlobals;
364 // seed the random number generator
367 FGControls *controls = new FGControls;
368 globals->set_controls( controls );
370 string_list *col = new string_list;
371 globals->set_channel_options_list( col );
373 fgValidatePath("", false); // initialize static variables
374 upper_case_property("/sim/presets/airport-id");
375 upper_case_property("/sim/presets/runway");
376 upper_case_property("/sim/tower/airport-id");
377 upper_case_property("/autopilot/route-manager/input");
379 // Load the configuration parameters. (Command line options
380 // override config file options. Config file options override
382 if ( !fgInitConfig(argc, argv) ) {
383 SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
387 // Initialize the Window/Graphics environment.
388 fgOSInit(&argc, argv);
391 fgRegisterIdleHandler( &fgIdleFunction );
393 // Initialize sockets (WinSock needs this)
394 simgear::Socket::initSockets();
396 // Clouds3D requires an alpha channel
397 fgOSOpenWindow(true /* request stencil buffer */);
399 // Initialize the splash screen right away
403 // pass control off to the master event handler
404 int result = fgOSMainLoop();
406 // clean up here; ensure we null globals to avoid
407 // confusing the atexit() handler
411 // delete the NavCache here. This will cause the destruction of many cached
412 // objects (eg, airports, navaids, runways).
413 delete flightgear::NavDataCache::instance();