src/Main/main.cxx

   1 // main.cxx -- top level sim routines
   2 //
   3 // Written by Curtis Olson, started May 1997.
   4 //
   5 // Copyright (C) 1997 - 2002  Curtis L. Olson  - http://www.flightgear.org/~curt
   6 //
   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.
  11 //
  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.
  16 //
  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.
  20 //
  21 // $Id$
  22
  23
  24 #ifdef HAVE_CONFIG_H
  25 #  include <config.h>
  26 #endif
  27
  28 #include <simgear/compiler.h>
  29
  30 #if defined(__linux__) && defined(__i386__)
  31 #  include <fpu_control.h>
  32 #  include <signal.h>
  33 #endif
  34
  35 #include <iostream>
  36
  37 #include <osg/Camera>
  38 #include <osg/GraphicsContext>
  39 #include <osgDB/Registry>
  40
  41 // Class references
  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>
  51
  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>
  58 #include <GUI/gui.h>
  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>
  64
  65 #include "fg_commands.hxx"
  66 #include "fg_io.hxx"
  67 #include "main.hxx"
  68 #include "util.hxx"
  69 #include "fg_init.hxx"
  70 #include "fg_os.hxx"
  71 #include "fg_props.hxx"
  72 #include "positioninit.hxx"
  73
  74 using namespace flightgear;
  75
  76 using std::cerr;
  77 using std::vector;
  78
  79 // The atexit() function handler should know when the graphical subsystem
  80 // is initialized.
  81 extern int _bootstrap_OSInit;
  82
  83
  84 static void fgLoadInitialScenery()
  85 {
  86     static SGPropertyNode_ptr scenery_loaded
  87         = fgGetNode("sim/sceneryloaded", true);
  88     static SGPropertyNode_ptr scenery_override
  89         = fgGetNode("/sim/sceneryloaded-override", true);
  90
  91     if (!scenery_loaded->getBoolValue())
  92     {
  93         if (scenery_override->getBoolValue() ||
  94             (globals->get_tile_mgr()->isSceneryLoaded()
  95              && fgGetBool("sim/fdm-initialized"))) {
  96             fgSetBool("sim/sceneryloaded",true);
  97             fgSplashProgress("");
  98         }
  99         else
 100         {
 101             fgSplashProgress("loading-scenery");
 102             // be nice to loader threads while waiting for initial scenery, reduce to 20fps
 103             SGTimeStamp::sleepForMSec(50);
 104         }
 105     }
 106 }
 107
 108 // What should we do when we have nothing else to do?  Let's get ready
 109 // for the next move and update the display?
 110 static void fgMainLoop( void )
 111 {
 112     static SGPropertyNode_ptr frame_signal
 113         = fgGetNode("/sim/signals/frame", true);
 114
 115     frame_signal->fireValueChanged();
 116
 117     SG_LOG( SG_GENERAL, SG_DEBUG, "Running Main Loop");
 118     SG_LOG( SG_GENERAL, SG_DEBUG, "======= ==== ====");
 119
 120     // compute simulated time (allowing for pause, warp, etc) and
 121     // real elapsed time
 122     double sim_dt, real_dt;
 123     static TimeManager* timeMgr = (TimeManager*) globals->get_subsystem("time");
 124     timeMgr->computeTimeDeltas(sim_dt, real_dt);
 125
 126     // update all subsystems
 127     globals->get_subsystem_mgr()->update(sim_dt);
 128
 129     // END Tile Manager updates
 130     fgLoadInitialScenery();
 131
 132     simgear::AtomicChangeListener::fireChangeListeners();
 133
 134     SG_LOG( SG_GENERAL, SG_DEBUG, "" );
 135 }
 136
 137 // Operation for querying OpenGL parameters. This must be done in a
 138 // valid OpenGL context, potentially in another thread.
 139 namespace
 140 {
 141 struct GeneralInitOperation : public GraphicsContextOperation
 142 {
 143     GeneralInitOperation()
 144         : GraphicsContextOperation(std::string("General init"))
 145     {
 146     }
 147     void run(osg::GraphicsContext* gc)
 148     {
 149         SGPropertyNode* simRendering = fgGetNode("/sim/rendering");
 150
 151         simRendering->setStringValue("gl-vendor", (char*) glGetString(GL_VENDOR));
 152         SG_LOG( SG_GENERAL, SG_INFO, glGetString(GL_VENDOR));
 153
 154         simRendering->setStringValue("gl-renderer", (char*) glGetString(GL_RENDERER));
 155         SG_LOG( SG_GENERAL, SG_INFO, glGetString(GL_RENDERER));
 156
 157         simRendering->setStringValue("gl-version", (char*) glGetString(GL_VERSION));
 158         SG_LOG( SG_GENERAL, SG_INFO, glGetString(GL_VERSION));
 159
 160         simRendering->setStringValue("gl-shading-language-version", (char*) glGetString(GL_SHADING_LANGUAGE_VERSION));
 161         SG_LOG( SG_GENERAL, SG_INFO, glGetString(GL_SHADING_LANGUAGE_VERSION));
 162
 163         GLint tmp;
 164         glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
 165         simRendering->setIntValue("max-texture-size", tmp);
 166
 167         glGetIntegerv( GL_DEPTH_BITS, &tmp );
 168         simRendering->setIntValue("depth-buffer-bits", tmp);
 169     }
 170 };
 171
 172 }
 173
 174 // This is the top level master main function that is registered as
 175 // our idle function
 176
 177 // The first few passes take care of initialization things (a couple
 178 // per pass) and once everything has been initialized fgMainLoop from
 179 // then on.
 180
 181 static void fgIdleFunction ( void ) {
 182     // Specify our current idle function state.  This is used to run all
 183     // our initializations out of the idle callback so that we can get a
 184     // splash screen up and running right away.
 185     static int idle_state = 0;
 186
 187     static osg::ref_ptr<GeneralInitOperation> genOp;
 188     if ( idle_state == 0 ) {
 189         idle_state++;
 190         // Pick some window on which to do queries.
 191         // XXX Perhaps all this graphics initialization code should be
 192         // moved to renderer.cxx?
 193         genOp = new GeneralInitOperation;
 194         osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 195         WindowSystemAdapter* wsa = WindowSystemAdapter::getWSA();
 196         osg::GraphicsContext* gc = 0;
 197         if (guiCamera)
 198             gc = guiCamera->getGraphicsContext();
 199         if (gc) {
 200             gc->add(genOp.get());
 201         } else {
 202             wsa->windows[0]->gc->add(genOp.get());
 203         }
 204         guiStartInit(gc);
 205     } else if ( idle_state == 1 ) {
 206         if (genOp.valid()) {
 207             if (!genOp->isFinished())
 208                 return;
 209             genOp = 0;
 210         }
 211         if (!guiFinishInit())
 212             return;
 213         idle_state++;
 214         fgSplashProgress("loading-aircraft-list");
 215
 216     } else if ( idle_state == 2 ) {
 217         idle_state++;
 218         fgSplashProgress("loading-nav-data");
 219
 220     } else if ( idle_state == 3 ) {
 221         idle_state++;
 222         fgInitNav();
 223
 224         fgSplashProgress("init-scenery");
 225
 226     } else if ( idle_state == 4 ) {
 227         idle_state+=2;
 228         // based on the requested presets, calculate the true starting
 229         // lon, lat
 230         flightgear::initPosition();
 231         flightgear::initTowerLocationListener();
 232
 233         TimeManager* t = new TimeManager;
 234         globals->add_subsystem("time", t, SGSubsystemMgr::INIT);
 235         t->init(); // need to init now, not during initSubsystems
 236
 237         // Do some quick general initializations
 238         if( !fgInitGeneral()) {
 239             SG_LOG( SG_GENERAL, SG_ALERT,
 240                 "General initialization failed ..." );
 241             exit(-1);
 242         }
 243
 244         ////////////////////////////////////////////////////////////////////
 245         // Initialize the property-based built-in commands
 246         ////////////////////////////////////////////////////////////////////
 247         fgInitCommands();
 248
 249         ////////////////////////////////////////////////////////////////////
 250         // Initialize the material manager
 251         ////////////////////////////////////////////////////////////////////
 252         globals->set_matlib( new SGMaterialLib );
 253         simgear::SGModelLib::init(globals->get_fg_root(), globals->get_props());
 254         simgear::SGModelLib::setPanelFunc(FGPanelNode::load);
 255
 256         ////////////////////////////////////////////////////////////////////
 257         // Initialize the TG scenery subsystem.
 258         ////////////////////////////////////////////////////////////////////
 259         simgear::SGTerraSync* terra_sync = new simgear::SGTerraSync(globals->get_props());
 260         globals->add_subsystem("terrasync", terra_sync);
 261         globals->set_scenery( new FGScenery );
 262         globals->get_scenery()->init();
 263         globals->get_scenery()->bind();
 264         globals->set_tile_mgr( new FGTileMgr );
 265
 266         fgSplashProgress("loading-aircraft");
 267
 268     } else if ( idle_state == 6 ) {
 269         idle_state++;
 270         fgSplashProgress("creating-subsystems");
 271
 272     } else if ( idle_state == 7 ) {
 273         idle_state++;
 274         SGTimeStamp st;
 275         st.stamp();
 276         fgCreateSubsystems();
 277         SG_LOG(SG_GENERAL, SG_INFO, "Creating subsystems took:" << st.elapsedMSec());
 278         fgSplashProgress("binding-subsystems");
 279
 280     } else if ( idle_state == 8 ) {
 281         idle_state++;
 282         SGTimeStamp st;
 283         st.stamp();
 284         globals->get_subsystem_mgr()->bind();
 285         SG_LOG(SG_GENERAL, SG_INFO, "Binding subsystems took:" << st.elapsedMSec());
 286
 287         fgSplashProgress("init-subsystems");
 288     } else if ( idle_state == 9 ) {
 289         SGSubsystem::InitStatus status = globals->get_subsystem_mgr()->incrementalInit();
 290         if ( status == SGSubsystem::INIT_DONE) {
 291           ++idle_state;
 292           fgSplashProgress("finishing-subsystems");
 293         } else {
 294           fgSplashProgress("init-subsystems");
 295         }
 296
 297     } else if ( idle_state == 10 ) {
 298         idle_state = 900;
 299         fgPostInitSubsystems();
 300
 301               // Torsten Dreyer:
 302         // ugly hack for automatic runway selection on startup based on
 303         // metar data. Makes startup.nas obsolete and guarantees the same
 304         // runway selection as for AI traffic. However, this code belongs to
 305         // somewhere(?) else - if I only new where...
 306         if( true == fgGetBool( "/environment/metar/valid" ) ) {
 307             SG_LOG(SG_ENVIRONMENT, SG_INFO,
 308                 "Using METAR for runway selection: '" << fgGetString("/environment/metar/data") << "'" );
 309             // the realwx_ctrl fetches metar in the foreground on init,
 310             // If it was able to fetch a metar or one was given on the commandline,
 311             // the valid flag is set here, otherwise it is false
 312             double hdg = fgGetDouble( "/environment/metar/base-wind-dir-deg", 9999.0 );
 313             string apt = fgGetString( "/sim/startup/options/airport" );
 314             string rwy = fgGetString( "/sim/startup/options/runway" );
 315             double strthdg = fgGetDouble( "/sim/startup/options/heading-deg", 9999.0 );
 316             string parkpos = fgGetString( "/sim/presets/parkpos" );
 317             bool onground = fgGetBool( "/sim/presets/onground", false );
 318             // don't check for wind-speed < 1kt, this belongs to the runway-selection code
 319             // the other logic is taken from former startup.nas
 320             if( hdg < 360.0 && apt.length() > 0 && strthdg > 360.0 && rwy.length() == 0 && onground && parkpos.length() == 0 ) {
 321                 extern bool fgSetPosFromAirportIDandHdg( const string& id, double tgt_hdg );
 322                 flightgear::setPosFromAirportIDandHdg( apt, hdg );
 323             }
 324         } else {
 325             SG_LOG(SG_ENVIRONMENT, SG_INFO,
 326                 "No METAR available to pick active runway" );
 327         }
 328
 329         fgSplashProgress("init-graphics");
 330
 331     } else if ( idle_state == 900 ) {
 332         idle_state = 1000;
 333
 334         // setup OpenGL view parameters
 335         globals->get_renderer()->setupView();
 336
 337         globals->get_renderer()->resize( fgGetInt("/sim/startup/xsize"),
 338                                          fgGetInt("/sim/startup/ysize") );
 339
 340         int session = fgGetInt("/sim/session",0);
 341         session++;
 342         fgSetInt("/sim/session",session);
 343     }
 344
 345     if ( idle_state == 1000 ) {
 346         // We've finished all our initialization steps, from now on we
 347         // run the main loop.
 348         fgSetBool("sim/sceneryloaded", false);
 349         fgRegisterIdleHandler( fgMainLoop );
 350     }
 351 }
 352
 353 static void upper_case_property(const char *name)
 354 {
 355     using namespace simgear;
 356     SGPropertyNode *p = fgGetNode(name, false);
 357     if (!p) {
 358         p = fgGetNode(name, true);
 359         p->setStringValue("");
 360     } else {
 361         props::Type t = p->getType();
 362         if (t == props::NONE || t == props::UNSPECIFIED)
 363             p->setStringValue("");
 364         else
 365             assert(t == props::STRING);
 366     }
 367     p->addChangeListener(new FGMakeUpperCase);
 368 }
 369
 370
 371 // Main top level initialization
 372 int fgMainInit( int argc, char **argv ) {
 373
 374     // set default log levels
 375     sglog().setLogLevels( SG_ALL, SG_ALERT );
 376
 377     string version;
 378 #ifdef FLIGHTGEAR_VERSION
 379     version = FLIGHTGEAR_VERSION;
 380 #else
 381     version = "unknown version";
 382 #endif
 383     SG_LOG( SG_GENERAL, SG_INFO, "FlightGear:  Version "
 384             << version );
 385     SG_LOG( SG_GENERAL, SG_INFO, "Built with " << SG_COMPILER_STR << std::endl );
 386
 387     // Allocate global data structures.  This needs to happen before
 388     // we parse command line options
 389
 390     globals = new FGGlobals;
 391
 392     // seed the random number generator
 393     sg_srandom_time();
 394
 395     FGControls *controls = new FGControls;
 396     globals->set_controls( controls );
 397
 398     string_list *col = new string_list;
 399     globals->set_channel_options_list( col );
 400
 401     fgValidatePath("", false);  // initialize static variables
 402     upper_case_property("/sim/presets/airport-id");
 403     upper_case_property("/sim/presets/runway");
 404     upper_case_property("/sim/tower/airport-id");
 405     upper_case_property("/autopilot/route-manager/input");
 406
 407     // Load the configuration parameters.  (Command line options
 408     // override config file options.  Config file options override
 409     // defaults.)
 410     if ( !fgInitConfig(argc, argv) ) {
 411       SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
 412       exit(-1);
 413     }
 414
 415     // Initialize the Window/Graphics environment.
 416     fgOSInit(&argc, argv);
 417     _bootstrap_OSInit++;
 418
 419     fgRegisterIdleHandler( &fgIdleFunction );
 420
 421     // Initialize sockets (WinSock needs this)
 422     simgear::Socket::initSockets();
 423
 424     // Clouds3D requires an alpha channel
 425     fgOSOpenWindow(true /* request stencil buffer */);
 426
 427     // Initialize the splash screen right away
 428     fntInit();
 429     fgSplashInit();
 430
 431     // pass control off to the master event handler
 432     int result = fgOSMainLoop();
 433
 434     // clean up here; ensure we null globals to avoid
 435     // confusing the atexit() handler
 436     delete globals;
 437     globals = NULL;
 438
 439     // delete the NavCache here. This will cause the destruction of many cached
 440     // objects (eg, airports, navaids, runways).
 441     delete flightgear::NavDataCache::instance();
 442
 443     return result;
 444 }