X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FMain%2Ffg_init.cxx;h=f7c591d397dc3e17d66307259293b54a2bc4cf66;hb=a704a6208131cad4f12123a72acdb1fb3dc6658f;hp=bddcc69f1d00c2c3f8410336a057d577a1a9e5f2;hpb=ca346ebc9c59297972c6e72d6e88304750deef21;p=flightgear.git

diff --git a/src/Main/fg_init.cxx b/src/Main/fg_init.cxx
index bddcc69f1..f7c591d39 100644
--- a/src/Main/fg_init.cxx
+++ b/src/Main/fg_init.cxx
@@ -29,21 +29,9 @@
 #include <stdlib.h>
 #include <string.h>             // strcmp()
 
-#if defined( unix ) || defined( __CYGWIN__ )
-#  include <unistd.h>           // for gethostname()
-#endif
 #ifdef _WIN32
-#  include <direct.h>           // for getcwd()
-#  define getcwd _getcwd
 #  include <io.h>               // isatty()
 #  define isatty _isatty
-#  include "winsock2.h"		// for gethostname()
-#endif
-
-// work around a stdc++ lib bug in some versions of linux, but doesn't
-// seem to hurt to have this here for all versions of Linux.
-#ifdef linux
-#  define _G_NO_EXTERN_TEMPLATES
 #endif
 
 #include <simgear/compiler.h>
@@ -56,77 +44,62 @@
 #include <simgear/debug/logstream.hxx>
 #include <simgear/structure/exception.hxx>
 #include <simgear/structure/event_mgr.hxx>
+#include <simgear/structure/SGPerfMon.hxx>
 #include <simgear/misc/sg_path.hxx>
+#include <simgear/misc/sg_dir.hxx>
+#include <simgear/misc/sgstream.hxx>
+#include <simgear/misc/strutils.hxx>
+#include <simgear/props/props_io.hxx>
+
 #include <simgear/misc/interpolator.hxx>
 #include <simgear/scene/material/matlib.hxx>
 #include <simgear/scene/model/particles.hxx>
-#include <simgear/sound/soundmgr_openal.hxx>
-#include <simgear/timing/sg_time.hxx>
-#include <simgear/timing/lowleveltime.h>
 
-#include <Aircraft/aircraft.hxx>
 #include <Aircraft/controls.hxx>
 #include <Aircraft/replay.hxx>
-#include <Airports/apt_loader.hxx>
 #include <Airports/runways.hxx>
 #include <Airports/simple.hxx>
 #include <Airports/dynamics.hxx>
 
 #include <AIModel/AIManager.hxx>
 
-#if ENABLE_ATCDCL
-#   include <ATCDCL/ATCmgr.hxx>
-#   include <ATCDCL/AIMgr.hxx>
-#   include "ATCDCL/commlist.hxx"
-#else
-#   include "ATC/atcutils.hxx"
-#endif
+#include <ATCDCL/ATISmgr.hxx>
+#include <ATC/atc_mgr.hxx>
 
 #include <Autopilot/route_mgr.hxx>
-#include <Autopilot/xmlauto.hxx>
-#include <Autopilot/autobrake.hxx>
+#include <Autopilot/autopilotgroup.hxx>
 
-#include <Cockpit/cockpit.hxx>
 #include <Cockpit/panel.hxx>
 #include <Cockpit/panel_io.hxx>
 
-#if ENABLE_SP_FDM
-#include <FDM/SP/ADA.hxx>
-#include <FDM/SP/ACMS.hxx>
-#include <FDM/SP/MagicCarpet.hxx>
-#include <FDM/SP/Balloon.h>
-#endif
-#include <FDM/ExternalNet/ExternalNet.hxx>
-#include <FDM/ExternalPipe/ExternalPipe.hxx>
-#include <FDM/JSBSim/JSBSim.hxx>
-#include <FDM/LaRCsim/LaRCsim.hxx>
-#include <FDM/UFO.hxx>
-#include <FDM/NullFDM.hxx>
-#include <FDM/YASim/YASim.hxx>
+#include <Canvas/canvas_mgr.hxx>
+#include <Canvas/gui_mgr.hxx>
 #include <GUI/new_gui.hxx>
-#include <Include/general.hxx>
 #include <Input/input.hxx>
 #include <Instrumentation/instrument_mgr.hxx>
 #include <Model/acmodel.hxx>
+#include <Model/modelmgr.hxx>
 #include <AIModel/submodel.hxx>
 #include <AIModel/AIManager.hxx>
 #include <Navaids/navdb.hxx>
 #include <Navaids/navlist.hxx>
-#include <Navaids/fix.hxx>
-#include <Navaids/fixlist.hxx>
 #include <Scenery/scenery.hxx>
 #include <Scenery/tilemgr.hxx>
 #include <Scripting/NasalSys.hxx>
 #include <Sound/voice.hxx>
+#include <Sound/soundmanager.hxx>
 #include <Systems/system_mgr.hxx>
 #include <Time/light.hxx>
-#include <Time/sunsolver.hxx>
-#include <Time/tmp.hxx>
 #include <Traffic/TrafficMgr.hxx>
 #include <MultiPlayer/multiplaymgr.hxx>
-
+#include <FDM/fdm_shell.hxx>
+#include <Environment/ephemeris.hxx>
 #include <Environment/environment_mgr.hxx>
-#include <Environment/ridge_lift.hxx>
+#include <Viewer/renderer.hxx>
+#include <Viewer/viewmgr.hxx>
+#include <Navaids/NavDataCache.hxx>
+#include <Instrumentation/HUD/HUD.hxx>
+#include <Cockpit/cockpitDisplayManager.hxx>
 
 #include "fg_init.hxx"
 #include "fg_io.hxx"
@@ -135,212 +108,12 @@
 #include "options.hxx"
 #include "globals.hxx"
 #include "logger.hxx"
-#include "renderer.hxx"
-#include "viewmgr.hxx"
 #include "main.hxx"
-
-
-#ifdef __APPLE__
-#  include <CoreFoundation/CoreFoundation.h>
-#endif
+#include "positioninit.hxx"
 
 using std::string;
 using namespace boost::algorithm;
 
-extern const char *default_root;
-
-
-// Scan the command line options for the specified option and return
-// the value.
-static string fgScanForOption( const string& option, int argc, char **argv ) {
-    int i = 1;
-
-    if (hostname == NULL)
-    {
-        char _hostname[256];
-        gethostname(_hostname, 256);
-        hostname = strdup(_hostname);
-        free_hostname = true;
-    }
-
-    SG_LOG(SG_GENERAL, SG_INFO, "Scanning command line for: " << option );
-
-    int len = option.length();
-
-    while ( i < argc ) {
-	SG_LOG( SG_GENERAL, SG_DEBUG, "argv[" << i << "] = " << argv[i] );
-
-	string arg = argv[i];
-	if ( arg.find( option ) == 0 ) {
-	    return arg.substr( len );
-	}
-
-	i++;
-    }
-
-    return "";
-}
-
-
-// Scan the user config files for the specified option and return
-// the value.
-static string fgScanForOption( const string& option, const string& path ) {
-    sg_gzifstream in( path );
-    if ( !in.is_open() ) {
-        return "";
-    }
-
-    SG_LOG( SG_GENERAL, SG_INFO, "Scanning " << path << " for: " << option );
-
-    int len = option.length();
-
-    in >> skipcomment;
-    while ( ! in.eof() ) {
-	string line;
-	getline( in, line, '\n' );
-
-        // catch extraneous (DOS) line ending character
-        if ( line[line.length() - 1] < 32 ) {
-            line = line.substr( 0, line.length()-1 );
-        }
-
-	if ( line.find( option ) == 0 ) {
-	    return line.substr( len );
-	}
-
-	in >> skipcomment;
-    }
-
-    return "";
-}
-
-// Scan the user config files for the specified option and return
-// the value.
-static string fgScanForOption( const string& option ) {
-    string arg("");
-
-#if defined( unix ) || defined( __CYGWIN__ )
-    // Next check home directory for .fgfsrc.hostname file
-    if ( arg.empty() ) {
-        if ( homedir != NULL ) {
-            SGPath config( homedir );
-            config.append( ".fgfsrc" );
-            config.concat( "." );
-            config.concat( hostname );
-            arg = fgScanForOption( option, config.str() );
-        }
-    }
-#endif
-
-    // Next check home directory for .fgfsrc file
-    if ( arg.empty() ) {
-        if ( homedir != NULL ) {
-            SGPath config( homedir );
-            config.append( ".fgfsrc" );
-            arg = fgScanForOption( option, config.str() );
-        }
-    }
-
-    if ( arg.empty() ) {
-        // Check for $fg_root/system.fgfsrc
-        SGPath config( globals->get_fg_root() );
-        config.append( "system.fgfsrc" );
-        arg = fgScanForOption( option, config.str() );
-    }
-
-    return arg;
-}
-
-
-// Read in configuration (files and command line options) but only set
-// fg_root
-bool fgInitFGRoot ( int argc, char **argv ) {
-    string root;
-
-    // First parse command line options looking for --fg-root=, this
-    // will override anything specified in a config file
-    root = fgScanForOption( "--fg-root=", argc, argv);
-
-    // Check in one of the user configuration files.
-    if (root.empty() )
-        root = fgScanForOption( "--fg-root=" );
-    
-    // Next check if fg-root is set as an env variable
-    if ( root.empty() ) {
-        char *envp = ::getenv( "FG_ROOT" );
-        if ( envp != NULL ) {
-            root = envp;
-        }
-    }
-
-    // Otherwise, default to a random compiled-in location if we can't
-    // find fg-root any other way.
-    if ( root.empty() ) {
-#if defined( __CYGWIN__ )
-        root = "../data";
-#elif defined( _WIN32 )
-        root = "..\\data";
-#elif defined(__APPLE__) 
-        /*
-        The following code looks for the base package inside the application 
-        bundle, in the standard Contents/Resources location. 
-        */
-        CFURLRef resourcesUrl = CFBundleCopyResourcesDirectoryURL(CFBundleGetMainBundle());
-
-        // look for a 'data' subdir
-        CFURLRef dataDir = CFURLCreateCopyAppendingPathComponent(NULL, resourcesUrl, CFSTR("data"), true);
-
-        // now convert down to a path, and the a c-string
-        CFStringRef path = CFURLCopyFileSystemPath(dataDir, kCFURLPOSIXPathStyle);
-        root = CFStringGetCStringPtr(path, CFStringGetSystemEncoding());
-
-        CFRelease(resourcesUrl);
-        CFRelease(dataDir);
-        CFRelease(path);
-#else
-        root = PKGLIBDIR;
-#endif
-    }
-
-    SG_LOG(SG_INPUT, SG_INFO, "fg_root = " << root );
-    globals->set_fg_root(root);
-
-    return true;
-}
-
-
-// Read in configuration (files and command line options) but only set
-// aircraft
-bool fgInitFGAircraft ( int argc, char **argv ) {
-    string aircraft;
-
-    // First parse command line options looking for --aircraft=, this
-    // will override anything specified in a config file
-    aircraft = fgScanForOption( "--aircraft=", argc, argv );
-    if ( aircraft.empty() ) {
-        // check synonym option
-        aircraft = fgScanForOption( "--vehicle=", argc, argv );
-    }
-
-    // Check in one of the user configuration files.
-    if ( aircraft.empty() ) {
-        aircraft = fgScanForOption( "--aircraft=" );
-    }
-    if ( aircraft.empty() ) {
-        aircraft = fgScanForOption( "--vehicle=" );
-    }
-
-    // if an aircraft was specified, set the property name
-    if ( !aircraft.empty() ) {
-        SG_LOG(SG_INPUT, SG_INFO, "aircraft = " << aircraft );
-        fgSetString("/sim/aircraft", aircraft.c_str() );
-    } else {
-        SG_LOG(SG_INPUT, SG_INFO, "No user specified aircraft, using default" );
-    }
-
-    return true;
-}
-
 
 // Return the current base package version
 string fgBasePackageVersion() {
@@ -366,816 +139,353 @@ string fgBasePackageVersion() {
 }
 
 
-// Initialize the localization
-SGPropertyNode *fgInitLocale(const char *language) {
-   SGPropertyNode *c_node = NULL, *d_node = NULL;
-   SGPropertyNode *intl = fgGetNode("/sim/intl");
-
-   SG_LOG(SG_GENERAL, SG_INFO, "Selecting language: " << language );
-
-   // localization not defined
-   if (!intl)
-      return NULL;
-
-   //
-   // Select the proper language from the list
-   //
-   vector<SGPropertyNode_ptr> locale = intl->getChildren("locale");
-   for (unsigned int i = 0; i < locale.size(); i++) {
-
-      vector<SGPropertyNode_ptr> lang = locale[i]->getChildren("lang");
-      for (unsigned int j = 0; j < lang.size(); j++) {
-
-         if (!strcmp(lang[j]->getStringValue(), language)) {
-            c_node = locale[i];
-            break;
-         }
-      }
-   }
-
-
-   // Get the defaults
-   d_node = intl->getChild("locale");
-   if (!c_node)
-      c_node = d_node;
-
-   // Check for localized font
-   SGPropertyNode *font_n = c_node->getNode("font", true);
-   if ( !strcmp(font_n->getStringValue(), "") )
-      font_n->setStringValue(d_node->getStringValue("font", "typewriter.txf"));
-
-
-   //
-   // Load the default strings
-   //
-   SGPath d_path( globals->get_fg_root() );
-
-   const char *d_path_str = d_node->getStringValue("strings");
-   if (!d_path_str) {
-      SG_LOG(SG_GENERAL, SG_ALERT, "No path in " << d_node->getPath() << "/strings.");
-      return NULL;
-   }
-
-   d_path.append(d_path_str);
-   SG_LOG(SG_GENERAL, SG_INFO, "Reading localized strings from " << d_path.str());
-
-   SGPropertyNode *strings = c_node->getNode("strings");
-   try {
-      readProperties(d_path.str(), strings);
-   } catch (const sg_exception &) {
-      SG_LOG(SG_GENERAL, SG_ALERT, "Unable to read the localized strings");
-      return NULL;
-   }
-
-   //
-   // Load the language specific strings
-   //
-   if (c_node != d_node) {
-      SGPath c_path( globals->get_fg_root() );
-
-      const char *c_path_str = c_node->getStringValue("strings");
-      if (!c_path_str) {
-         SG_LOG(SG_GENERAL, SG_ALERT, "No path in " << c_node->getPath() << "/strings");
-         return NULL;
-      }
-
-      c_path.append(c_path_str);
-      SG_LOG(SG_GENERAL, SG_INFO, "Reading localized strings from " << c_path.str());
-
-      try {
-         readProperties(c_path.str(), strings);
-      } catch (const sg_exception &) {
-         SG_LOG(SG_GENERAL, SG_ALERT,
-                 "Unable to read the localized strings from " << c_path.str());
-         return NULL;
-      }
-   }
-
-   return c_node;
-}
-
-
-
-// Initialize the localization routines
-bool fgDetectLanguage() {
-    const char *language = ::getenv("LANG");
-
-    if (language == NULL) {
-        SG_LOG(SG_GENERAL, SG_INFO, "Unable to detect the language" );
-        language = "C";
+template <class T>
+bool fgFindAircraftInDir(const SGPath& dirPath, T* obj, bool (T::*pred)(const SGPath& p))
+{
+  if (!dirPath.exists()) {
+    SG_LOG(SG_GENERAL, SG_WARN, "fgFindAircraftInDir: no such path:" << dirPath.str());
+    return false;
+  }
+    
+  bool recurse = true;
+  simgear::Dir dir(dirPath);
+  simgear::PathList setFiles(dir.children(simgear::Dir::TYPE_FILE, "-set.xml"));
+  simgear::PathList::iterator p;
+  for (p = setFiles.begin(); p != setFiles.end(); ++p) {
+    // check file name ends with -set.xml
+    
+    // if we found a -set.xml at this level, don't recurse any deeper
+    recurse = false;
+    
+    bool done = (obj->*pred)(*p);
+    if (done) {
+      return true;
     }
-
-    SGPropertyNode *locale = fgInitLocale(language);
-    if (!locale) {
-       SG_LOG(SG_GENERAL, SG_ALERT,
-              "No internationalization settings specified in preferences.xml" );
-
-       return false;
+  } // of -set.xml iteration
+  
+  if (!recurse) {
+    return false;
+  }
+  
+  simgear::PathList subdirs(dir.children(simgear::Dir::TYPE_DIR | simgear::Dir::NO_DOT_OR_DOTDOT));
+  for (p = subdirs.begin(); p != subdirs.end(); ++p) {
+    if (p->file() == "CVS") {
+      continue;
     }
-
-    globals->set_locale( locale );
-
-    return true;
-}
-
-// Attempt to locate and parse the various non-XML config files in order
-// from least precidence to greatest precidence
-static void
-do_options (int argc, char ** argv)
-{
-    // Check for $fg_root/system.fgfsrc
-    SGPath config( globals->get_fg_root() );
-    config.append( "system.fgfsrc" );
-    fgParseOptions(config.str());
-
-#if defined( unix ) || defined( __CYGWIN__ )
-    config.concat( "." );
-    config.concat( hostname );
-    fgParseOptions(config.str());
-#endif
-
-    // Check for ~/.fgfsrc
-    if ( homedir != NULL ) {
-        config.set( homedir );
-        config.append( ".fgfsrc" );
-        fgParseOptions(config.str());
+    
+    if (fgFindAircraftInDir(*p, obj, pred)) {
+      return true;
     }
-
-#if defined( unix ) || defined( __CYGWIN__ )
-    // Check for ~/.fgfsrc.hostname
-    config.concat( "." );
-    config.concat( hostname );
-    fgParseOptions(config.str());
-#endif
-
-    // Parse remaining command line options
-    // These will override anything specified in a config file
-    fgParseArgs(argc, argv);
+  } // of subdirs iteration
+  
+  return false;
 }
 
-
-static string fgFindAircraftPath( const SGPath &path, const string &aircraft,
-                                  SGPropertyNode *cache, int depth = 0 )
+template <class T>
+void fgFindAircraft(T* obj, bool (T::*pred)(const SGPath& p))
 {
-    const int MAXDEPTH = 1;
-
-    ulDirEnt* dire;
-    ulDir *dirp = ulOpenDir(path.str().c_str());
-    if (dirp == NULL) {
-        cerr << "Unable to open aircraft directory '" << path.str() << '\'' << endl;
-        exit(-1);
-    }
-
-    string result;
-    while ((dire = ulReadDir(dirp)) != NULL) {
-        if (dire->d_isdir) {
-            if (depth > MAXDEPTH)
-                continue;
-
-            if (!strcmp("CVS", dire->d_name) || !strcmp(".", dire->d_name)
-                    || !strcmp("..", dire->d_name) || !strcmp("AI", dire->d_name))
-                continue;
-
-            SGPath next = path;
-            next.append(dire->d_name);
-
-            result = fgFindAircraftPath( next, aircraft, cache, depth + 1 );
-            if ( ! result.empty() )
-                break;
-
-        } else {
-            int len = strlen(dire->d_name);
-            if (len < 9 || strcmp(dire->d_name + len - 8, "-set.xml"))
-                continue;
-
-            // create cache node
-            int i = 0;
-            while (1)
-                if (!cache->getChild("aircraft", i++, false))
-                    break;
-
-            SGPropertyNode *n, *entry = cache->getChild("aircraft", --i, true);
-
-            n = entry->getNode("file", true);
-            n->setStringValue(dire->d_name);
-            n->setAttribute(SGPropertyNode::USERARCHIVE, true);
-
-            n = entry->getNode("path", true);
-            n->setStringValue(path.str().c_str());
-            n->setAttribute(SGPropertyNode::USERARCHIVE, true);
-
-            if ( boost::equals(dire->d_name, aircraft.c_str(), is_iequal()) ) {
-                result = path.str();
-                break;
-            }
-        }
-    }
-
-    ulCloseDir(dirp);
-    return result;
+  const string_list& paths(globals->get_aircraft_paths());
+  string_list::const_iterator it = paths.begin();
+  for (; it != paths.end(); ++it) {
+    bool done = fgFindAircraftInDir(SGPath(*it), obj, pred);
+    if (done) {
+      return;
+    }
+  } // of aircraft paths iteration
+  
+  // if we reach this point, search the default location (always last)
+  SGPath rootAircraft(globals->get_fg_root());
+  rootAircraft.append("Aircraft");
+  fgFindAircraftInDir(rootAircraft, obj, pred);
 }
 
-
-// Read in configuration (file and command line)
-bool fgInitConfig ( int argc, char **argv ) {
-
-    // First, set some sane default values
-    fgSetDefaults();
-
-    // Read global preferences from $FG_ROOT/preferences.xml
-    SG_LOG(SG_INPUT, SG_INFO, "Reading global preferences");
-    fgLoadProps("preferences.xml", globals->get_props());
-    SG_LOG(SG_INPUT, SG_INFO, "Finished Reading global preferences");
-
-    // Detect the required language as early as possible
-    if ( !fgDetectLanguage() ) {
-        return false;
+class FindAndCacheAircraft
+{
+public:
+  FindAndCacheAircraft(SGPropertyNode* autoSave)
+  {
+    _cache = autoSave->getNode("sim/startup/path-cache", true);
+  }
+  
+  bool loadAircraft()
+  {
+    std::string aircraft = fgGetString( "/sim/aircraft", "");
+    if (aircraft.empty()) {
+      SG_LOG(SG_GENERAL, SG_ALERT, "no aircraft specified");
+      return false;
     }
-
-    SGPropertyNode autosave;
-#ifdef _WIN32
-    char *envp = ::getenv( "APPDATA" );
-    if (envp != NULL ) {
-        SGPath config( envp );
-        config.append( "flightgear.org" );
-#else
-    if ( homedir != NULL ) {
-        SGPath config( homedir );
-        config.append( ".fgfs" );
-#endif
-        const char *fg_home = getenv("FG_HOME");
-        if (fg_home)
-            config = fg_home;
-
-        SGPath home_export(config.str());
-        home_export.append("Export/dummy");
-        home_export.create_dir(0777);
-
-        // Set /sim/fg-home and don't allow malign code to override it until
-        // Nasal security is set up.  Use FG_HOME if necessary.
-        SGPropertyNode *home = fgGetNode("/sim", true);
-        home->removeChild("fg-home", 0, false);
-        home = home->getChild("fg-home", 0, true);
-        home->setStringValue(config.c_str());
-        home->setAttribute(SGPropertyNode::WRITE, false);
-
-        config.append( "autosave.xml" );
-        SG_LOG(SG_INPUT, SG_INFO, "Reading user settings from " << config.str());
+    
+    _searchAircraft = aircraft + "-set.xml";
+    std::string aircraftDir = fgGetString("/sim/aircraft-dir", "");
+    if (!aircraftDir.empty()) {
+      // aircraft-dir was set, skip any searching at all, if it's valid
+      simgear::Dir acPath(aircraftDir);
+      SGPath setFile = acPath.file(_searchAircraft);
+      if (setFile.exists()) {
+        SG_LOG(SG_GENERAL, SG_INFO, "found aircraft in dir: " << aircraftDir );
+        
         try {
-            readProperties(config.str(), &autosave, SGPropertyNode::USERARCHIVE);
-        } catch (...) {
-            SG_LOG(SG_INPUT, SG_DEBUG, "First time reading user settings");
+          readProperties(setFile.str(), globals->get_props());
+        } catch ( const sg_exception &e ) {
+          SG_LOG(SG_INPUT, SG_ALERT, "Error reading aircraft: " << e.getFormattedMessage());
+          return false;
         }
-        SG_LOG(SG_INPUT, SG_DEBUG, "Finished Reading user settings");
-    }
-    SGPropertyNode *cache_root = autosave.getNode("sim/startup/path-cache", true);
-
-
-    // Scan user config files and command line for a specified aircraft.
-    fgInitFGAircraft(argc, argv);
-
-    string aircraft = fgGetString( "/sim/aircraft", "" );
-    if ( aircraft.size() > 0 ) {
-        SGPath aircraft_search( globals->get_fg_root() );
-        aircraft_search.append( "Aircraft" );
-
-        string aircraft_set = aircraft + "-set.xml";
-        string result;
-
-        // check if the *-set.xml file is already in the cache
-        if (globals->get_fg_root() == cache_root->getStringValue("fg-root", "")) {
-            vector<SGPropertyNode_ptr> cache = cache_root->getChildren("aircraft");
-            for (unsigned int i = 0; i < cache.size(); i++) {
-                const char *name = cache[i]->getStringValue("file", "");
-                if (boost::equals(aircraft_set, name, is_iequal())) {
-                    const char *path = cache[i]->getStringValue("path", "");
-                    SGPath xml(path);
-                    xml.append(name);
-                    if (xml.exists())
-                        result = path;
-                    break;
-                }
-            }
-        }
-
-        if (result.empty()) {
-            // prepare cache for rescan
-            SGPropertyNode *n = cache_root->getNode("fg-root", true);
-            n->setStringValue(globals->get_fg_root().c_str());
-            n->setAttribute(SGPropertyNode::USERARCHIVE, true);
-            cache_root->removeChildren("aircraft");
-
-            result = fgFindAircraftPath( aircraft_search, aircraft_set, cache_root );
-        }
-
-        if ( !result.empty() ) {
-            fgSetString( "/sim/aircraft-dir", result.c_str() );
-            SGPath full_name( result );
-            full_name.append( aircraft_set );
-
-            SG_LOG(SG_INPUT, SG_INFO, "Reading default aircraft: " << aircraft
-                   << " from " << full_name.str());
-            try {
-                readProperties( full_name.str(), globals->get_props() );
-            } catch ( const sg_exception &e ) {
-                string message = "Error reading default aircraft: ";
-                message += e.getFormattedMessage();
-                SG_LOG(SG_INPUT, SG_ALERT, message);
-                exit(2);
-            }
-        } else {
-            SG_LOG( SG_INPUT, SG_ALERT, "Cannot find specified aircraft: "
-                    << aircraft );
-            return false;
-        }
-
-    } else {
-        SG_LOG( SG_INPUT, SG_ALERT, "No default aircraft specified" );
-    }
-
-    copyProperties(&autosave, globals->get_props());
-
-    // parse options after loading aircraft to ensure any user
-    // overrides of defaults are honored.
-    do_options(argc, argv);
-
-    return true;
-}
-
-// Set current tower position lon/lat given an airport id
-static bool fgSetTowerPosFromAirportID( const string& id) {
-    const FGAirport *a = fgFindAirportID( id);
-    if (a) {
-        SGGeod tower = a->getTowerLocation();
-        fgSetDouble("/sim/tower/longitude-deg",  tower.getLongitudeDeg());
-        fgSetDouble("/sim/tower/latitude-deg",  tower.getLatitudeDeg());
-        fgSetDouble("/sim/tower/altitude-ft", tower.getElevationFt());
+        
         return true;
-    } else {
+      } else {
+        SG_LOG(SG_GENERAL, SG_ALERT, "aircraft '" << _searchAircraft << 
+               "' not found in specified dir:" << aircraftDir);
         return false;
+      }
     }
-
-}
-
-struct FGTowerLocationListener : SGPropertyChangeListener {
-    void valueChanged(SGPropertyNode* node) {
-        const string id(node->getStringValue());
-        fgSetTowerPosFromAirportID(id);
-    }
-};
-
-void fgInitTowerLocationListener() {
-    fgGetNode("/sim/tower/airport-id",  true)
-        ->addChangeListener( new FGTowerLocationListener(), true );
-}
-
-static void fgApplyStartOffset(const SGGeod& aStartPos, double aHeading, double aTargetHeading = HUGE_VAL)
-{
-  SGGeod startPos(aStartPos);
-  if (aTargetHeading == HUGE_VAL) {
-    aTargetHeading = aHeading;
-  }
+    
+    if (!checkCache()) {
+      // prepare cache for re-scan
+      SGPropertyNode *n = _cache->getNode("fg-root", true);
+      n->setStringValue(globals->get_fg_root().c_str());
+      n->setAttribute(SGPropertyNode::USERARCHIVE, true);
+      n = _cache->getNode("fg-aircraft", true);
+      n->setStringValue(getAircraftPaths().c_str());
+      n->setAttribute(SGPropertyNode::USERARCHIVE, true);
+      _cache->removeChildren("aircraft");
   
-  if ( fabs( fgGetDouble("/sim/presets/offset-distance-nm") ) > SG_EPSILON ) {
-    double offsetDistance = fgGetDouble("/sim/presets/offset-distance-nm");
-    offsetDistance *= SG_NM_TO_METER;
-    double offsetAzimuth = aHeading;
-    if ( fabs(fgGetDouble("/sim/presets/offset-azimuth-deg")) > SG_EPSILON ) {
-      offsetAzimuth = fgGetDouble("/sim/presets/offset-azimuth-deg");
-      aHeading = aTargetHeading;
-    }
-
-    SGGeod offset;
-    double az2; // dummy
-    SGGeodesy::direct(startPos, offsetAzimuth + 180, offsetDistance, offset, az2);
-    startPos = offset;
-  }
-
-  // presets
-  fgSetDouble("/sim/presets/longitude-deg", startPos.getLongitudeDeg() );
-  fgSetDouble("/sim/presets/latitude-deg", startPos.getLatitudeDeg() );
-  fgSetDouble("/sim/presets/heading-deg", aHeading );
-
-  // other code depends on the actual values being set ...
-  fgSetDouble("/position/longitude-deg",  startPos.getLongitudeDeg() );
-  fgSetDouble("/position/latitude-deg",  startPos.getLatitudeDeg() );
-  fgSetDouble("/orientation/heading-deg", aHeading );
-}
-
-// Set current_options lon/lat given an airport id and heading (degrees)
-static bool fgSetPosFromAirportIDandHdg( const string& id, double tgt_hdg ) {
-    if ( id.empty() )
-        return false;
-
-    // set initial position from runway and heading
-    SG_LOG( SG_GENERAL, SG_INFO,
-            "Attempting to set starting position from airport code "
-            << id << " heading " << tgt_hdg );
-
-    const FGAirport* apt = fgFindAirportID(id);
-    if (!apt) return false;
-    FGRunway* r = apt->findBestRunwayForHeading(tgt_hdg);
-    fgSetString("/sim/atc/runway", r->ident().c_str());
-
-    SGGeod startPos = r->pointOnCenterline(fgGetDouble("/sim/airport/runways/start-offset-m", 5.0));
-	  fgApplyStartOffset(startPos, r->headingDeg(), tgt_hdg);
-    return true;
-}
-
-// Set current_options lon/lat given an airport id and parkig position name
-static bool fgSetPosFromAirportIDandParkpos( const string& id, const string& parkpos ) {
-    if ( id.empty() )
-        return false;
-
-    // can't see an easy way around this const_cast at the moment
-    FGAirport* apt = const_cast<FGAirport*>(fgFindAirportID(id));
-    if (!apt) {
-        SG_LOG( SG_GENERAL, SG_ALERT, "Failed to find airport " << id );
-        return false;
-    }
-    FGAirportDynamics* dcs = apt->getDynamics();
-    if (!dcs) {
-        SG_LOG( SG_GENERAL, SG_ALERT,
-                "Failed to find parking position " << parkpos <<
-                " at airport " << id );
-        return false;
+      fgFindAircraft(this, &FindAndCacheAircraft::checkAircraft);
     }
     
-    int park_index = dcs->getNrOfParkings() - 1;
-    while (park_index >= 0 && dcs->getParkingName(park_index) != parkpos) park_index--;
-    if (park_index < 0) {
-        SG_LOG( SG_GENERAL, SG_ALERT,
-                "Failed to find parking position " << parkpos <<
-                " at airport " << id );
-        return false;
-    }
-    FGParking* parking = dcs->getParking(park_index);
-    parking->setAvailable(false);
-    fgApplyStartOffset(
-      SGGeod::fromDeg(parking->getLongitude(), parking->getLatitude()),
-      parking->getHeading());
-    return true;
-}
-
-
-// Set current_options lon/lat given an airport id and runway number
-static bool fgSetPosFromAirportIDandRwy( const string& id, const string& rwy, bool rwy_req ) {
-    if ( id.empty() )
-        return false;
-
-    // set initial position from airport and runway number
-    SG_LOG( SG_GENERAL, SG_INFO,
-            "Attempting to set starting position for "
-            << id << ":" << rwy );
-
-    const FGAirport* apt = fgFindAirportID(id);
-    if (!apt) {
-      SG_LOG( SG_GENERAL, SG_ALERT, "Failed to find airport:" << id);
+    if (_foundPath.str().empty()) {
+      SG_LOG(SG_GENERAL, SG_ALERT, "Cannot find specified aircraft: " << aircraft );
       return false;
     }
     
-    if (!apt->hasRunwayWithIdent(rwy)) {
-      SG_LOG( SG_GENERAL, rwy_req ? SG_ALERT : SG_INFO,
-                "Failed to find runway " << rwy <<
-                " at airport " << id << ". Using default runway." );
+    SG_LOG(SG_GENERAL, SG_INFO, "Loading aircraft -set file from:" << _foundPath.str());
+    fgSetString( "/sim/aircraft-dir", _foundPath.dir().c_str());
+    if (!_foundPath.exists()) {
+      SG_LOG(SG_GENERAL, SG_ALERT, "Unable to find -set file:" << _foundPath.str());
       return false;
     }
     
-    FGRunway* r(apt->getRunwayByIdent(rwy));
-    fgSetString("/sim/atc/runway", r->ident().c_str());
-    SGGeod startPos = r->pointOnCenterline( fgGetDouble("/sim/airport/runways/start-offset-m", 5.0));
-	  fgApplyStartOffset(startPos, r->headingDeg());
-    return true;
-}
-
-
-static void fgSetDistOrAltFromGlideSlope() {
-    // cout << "fgSetDistOrAltFromGlideSlope()" << endl;
-    string apt_id = fgGetString("/sim/presets/airport-id");
-    double gs = fgGetDouble("/sim/presets/glideslope-deg")
-        * SG_DEGREES_TO_RADIANS ;
-    double od = fgGetDouble("/sim/presets/offset-distance-nm");
-    double alt = fgGetDouble("/sim/presets/altitude-ft");
-
-    double apt_elev = 0.0;
-    if ( ! apt_id.empty() ) {
-        apt_elev = fgGetAirportElev( apt_id );
-        if ( apt_elev < -9990.0 ) {
-            apt_elev = 0.0;
-        }
-    } else {
-        apt_elev = 0.0;
-    }
-
-    if( fabs(gs) > 0.01 && fabs(od) > 0.1 && alt < -9990 ) {
-        // set altitude from glideslope and offset-distance
-        od *= SG_NM_TO_METER * SG_METER_TO_FEET;
-        alt = fabs(od*tan(gs)) + apt_elev;
-        fgSetDouble("/sim/presets/altitude-ft", alt);
-        fgSetBool("/sim/presets/onground", false);
-        SG_LOG( SG_GENERAL, SG_INFO, "Calculated altitude as: "
-                << alt  << " ft" );
-    } else if( fabs(gs) > 0.01 && alt > 0 && fabs(od) < 0.1) {
-        // set offset-distance from glideslope and altitude
-        od  = (alt - apt_elev) / tan(gs);
-        od *= -1*SG_FEET_TO_METER * SG_METER_TO_NM;
-        fgSetDouble("/sim/presets/offset-distance-nm", od);
-        fgSetBool("/sim/presets/onground", false);
-        SG_LOG( SG_GENERAL, SG_INFO, "Calculated offset distance as: " 
-                << od  << " nm" );
-    } else if( fabs(gs) > 0.01 ) {
-        SG_LOG( SG_GENERAL, SG_ALERT,
-                "Glideslope given but not altitude or offset-distance." );
-        SG_LOG( SG_GENERAL, SG_ALERT, "Resetting glideslope to zero" );
-        fgSetDouble("/sim/presets/glideslope-deg", 0);
-        fgSetBool("/sim/presets/onground", true);
-    }
-}
-
-
-// Set current_options lon/lat given an airport id and heading (degrees)
-static bool fgSetPosFromNAV( const string& id, const double& freq ) {
-    FGNavRecord *nav
-        = globals->get_navlist()->findByIdentAndFreq( id.c_str(), freq );
-
-  if (!nav) {
-    SG_LOG( SG_GENERAL, SG_ALERT, "Failed to locate NAV = "
-                << id << ":" << freq );
-    return false;
-  }
-  
-  fgApplyStartOffset(nav->geod(), fgGetDouble("/sim/presets/heading-deg"));
-  return true;
-}
-
-// Set current_options lon/lat given an aircraft carrier id
-static bool fgSetPosFromCarrier( const string& carrier, const string& posid ) {
-
-    // set initial position from runway and heading
-    SGGeod geodPos;
-    double heading;
-    SGVec3d uvw;
-    if (FGAIManager::getStartPosition(carrier, posid, geodPos, heading, uvw)) {
-        double lon = geodPos.getLongitudeDeg();
-        double lat = geodPos.getLatitudeDeg();
-        double alt = geodPos.getElevationFt();
-
-        SG_LOG( SG_GENERAL, SG_INFO, "Attempting to set starting position for "
-                << carrier << " at lat = " << lat << ", lon = " << lon
-                << ", alt = " << alt << ", heading = " << heading);
-
-        fgSetDouble("/sim/presets/longitude-deg",  lon);
-        fgSetDouble("/sim/presets/latitude-deg",  lat);
-        fgSetDouble("/sim/presets/altitude-ft", alt);
-        fgSetDouble("/sim/presets/heading-deg", heading);
-        fgSetDouble("/position/longitude-deg",  lon);
-        fgSetDouble("/position/latitude-deg",  lat);
-        fgSetDouble("/position/altitude-ft", alt);
-        fgSetDouble("/orientation/heading-deg", heading);
-
-        fgSetString("/sim/presets/speed-set", "UVW");
-        fgSetDouble("/velocities/uBody-fps", uvw(0));
-        fgSetDouble("/velocities/vBody-fps", uvw(1));
-        fgSetDouble("/velocities/wBody-fps", uvw(2));
-        fgSetDouble("/sim/presets/uBody-fps", uvw(0));
-        fgSetDouble("/sim/presets/vBody-fps", uvw(1));
-        fgSetDouble("/sim/presets/wBody-fps", uvw(2));
-
-        fgSetBool("/sim/presets/onground", true);
-
-        return true;
-    } else {
-        SG_LOG( SG_GENERAL, SG_ALERT, "Failed to locate aircraft carrier = "
-                << carrier );
-        return false;
-    }
-}
- 
-// Set current_options lon/lat given an airport id and heading (degrees)
-static bool fgSetPosFromFix( const string& id )
-{
-  FGPositioned::TypeFilter fixFilter(FGPositioned::FIX);
-  FGPositioned* fix = FGPositioned::findNextWithPartialId(NULL, id, &fixFilter);
-  if (!fix) {
-    SG_LOG( SG_GENERAL, SG_ALERT, "Failed to locate fix = " << id );
-    return false;
-  }
-  
-  fgApplyStartOffset(fix->geod(), fgGetDouble("/sim/presets/heading-deg"));
-  return true;
-}
-
-/**
- * Initialize vor/ndb/ils/fix list management and query systems (as
- * well as simple airport db list)
- */
-bool
-fgInitNav ()
-{
-    SG_LOG(SG_GENERAL, SG_INFO, "Loading Airport Database ...");
-
-    SGPath aptdb( globals->get_fg_root() );
-    aptdb.append( "Airports/apt.dat" );
-
-    SGPath p_metar( globals->get_fg_root() );
-    p_metar.append( "Airports/metar.dat" );
-
-// Initialise the frequency search map BEFORE reading
-// the airport database:
-
-
-
-    current_commlist = new FGCommList;
-    current_commlist->init( globals->get_fg_root() );
-    fgAirportDBLoad( aptdb.str(), current_commlist, p_metar.str() );
-
-    FGNavList *navlist = new FGNavList;
-    FGNavList *loclist = new FGNavList;
-    FGNavList *gslist = new FGNavList;
-    FGNavList *dmelist = new FGNavList;
-    FGNavList *tacanlist = new FGNavList;
-    FGNavList *carrierlist = new FGNavList;
-    FGTACANList *channellist = new FGTACANList;
-
-    globals->set_navlist( navlist );
-    globals->set_loclist( loclist );
-    globals->set_gslist( gslist );
-    globals->set_dmelist( dmelist );
-    globals->set_tacanlist( tacanlist );
-    globals->set_carrierlist( carrierlist );
-    globals->set_channellist( channellist );
-
-    if ( !fgNavDBInit(navlist, loclist, gslist, dmelist, tacanlist, carrierlist, channellist) ) {
-        SG_LOG( SG_GENERAL, SG_ALERT,
-                "Problems loading one or more navigational database" );
+    try {
+      readProperties(_foundPath.str(), globals->get_props());
+    } catch ( const sg_exception &e ) {
+      SG_LOG(SG_INPUT, SG_ALERT, "Error reading aircraft: " << e.getFormattedMessage());
+      return false;
     }
     
-    SG_LOG(SG_GENERAL, SG_INFO, "  Fixes");
-    SGPath p_fix( globals->get_fg_root() );
-    p_fix.append( "Navaids/fix.dat" );
-    FGFixList fixlist;
-    fixlist.init( p_fix );  // adds fixes to the DB in positioned.cxx
-
-    SG_LOG(SG_GENERAL, SG_INFO, "  Airways");
-    SGPath p_awy( globals->get_fg_root() );
-    p_awy.append( "Navaids/awy.dat" );
-    FGAirwayNetwork *awyNet = new FGAirwayNetwork;
-    //cerr << "Loading Airways" << endl;
-    awyNet->load (p_awy );
-    awyNet->init();
-    //cerr << "initializing airways" << endl;
-    globals->set_airwaynet( awyNet );
-
     return true;
-}
-
-
-// Set the initial position based on presets (or defaults)
-bool fgInitPosition() {
-    // cout << "fgInitPosition()" << endl;
-    double gs = fgGetDouble("/sim/presets/glideslope-deg")
-        * SG_DEGREES_TO_RADIANS ;
-    double od = fgGetDouble("/sim/presets/offset-distance-nm");
-    double alt = fgGetDouble("/sim/presets/altitude-ft");
-
-    bool set_pos = false;
-
-    // If glideslope is specified, then calculate offset-distance or
-    // altitude relative to glide slope if either of those was not
-    // specified.
-    if ( fabs( gs ) > 0.01 ) {
-        fgSetDistOrAltFromGlideSlope();
+  }
+  
+private:
+  SGPath getAircraftPaths() {
+    string_list pathList = globals->get_aircraft_paths();
+    SGPath aircraftPaths;
+    string_list::const_iterator it = pathList.begin();
+    if (it != pathList.end()) {
+        aircraftPaths.set(*it);
+        it++;
+    }
+    for (; it != pathList.end(); ++it) {
+        aircraftPaths.add(*it);
+    }
+    return aircraftPaths;
+  }
+  
+  bool checkCache()
+  {
+    if (globals->get_fg_root() != _cache->getStringValue("fg-root", "")) {
+      return false; // cache mismatch
     }
 
-
-    // If we have an explicit, in-range lon/lat, don't change it, just use it.
-    // If not, check for an airport-id and use that.
-    // If not, default to the middle of the KSFO field.
-    // The default values for lon/lat are deliberately out of range
-    // so that the airport-id can take effect; valid lon/lat will
-    // override airport-id, however.
-    double lon_deg = fgGetDouble("/sim/presets/longitude-deg");
-    double lat_deg = fgGetDouble("/sim/presets/latitude-deg");
-    if ( lon_deg >= -180.0 && lon_deg <= 180.0
-         && lat_deg >= -90.0 && lat_deg <= 90.0 )
-    {
-        set_pos = true;
+    if (getAircraftPaths().str() != _cache->getStringValue("fg-aircraft", "")) {
+      return false; // cache mismatch
     }
-
-    string apt = fgGetString("/sim/presets/airport-id");
-    string rwy_no = fgGetString("/sim/presets/runway");
-    bool rwy_req = fgGetBool("/sim/presets/runway-requested");
-    string vor = fgGetString("/sim/presets/vor-id");
-    double vor_freq = fgGetDouble("/sim/presets/vor-freq");
-    string ndb = fgGetString("/sim/presets/ndb-id");
-    double ndb_freq = fgGetDouble("/sim/presets/ndb-freq");
-    string carrier = fgGetString("/sim/presets/carrier");
-    string parkpos = fgGetString("/sim/presets/parkpos");
-    string fix = fgGetString("/sim/presets/fix");
-    SGPropertyNode *hdg_preset = fgGetNode("/sim/presets/heading-deg", true);
-    double hdg = hdg_preset->getDoubleValue();
-
-    // save some start parameters, so that we can later say what the
-    // user really requested. TODO generalize that and move it to options.cxx
-    static bool start_options_saved = false;
-    if (!start_options_saved) {
-        start_options_saved = true;
-        SGPropertyNode *opt = fgGetNode("/sim/startup/options", true);
-
-        opt->setDoubleValue("latitude-deg", lat_deg);
-        opt->setDoubleValue("longitude-deg", lon_deg);
-        opt->setDoubleValue("heading-deg", hdg);
-        opt->setStringValue("airport", apt.c_str());
-        opt->setStringValue("runway", rwy_no.c_str());
+    
+    vector<SGPropertyNode_ptr> cache = _cache->getChildren("aircraft");
+    for (unsigned int i = 0; i < cache.size(); i++) {
+      const char *name = cache[i]->getStringValue("file", "");
+      if (!boost::equals(_searchAircraft, name, is_iequal())) {
+        continue;
+      }
+      
+      SGPath xml(cache[i]->getStringValue("path", ""));
+      xml.append(name);
+      if (xml.exists()) {
+        _foundPath = xml;
+        return true;
+      } 
+      
+      return false;
+    } // of aircraft in cache iteration
+    
+    return false;
+  }
+  
+  bool checkAircraft(const SGPath& p)
+  {
+    // create cache node
+    int i = 0;
+    while (1) {
+        if (!_cache->getChild("aircraft", i++, false))
+            break;
     }
+    
+    SGPropertyNode *n, *entry = _cache->getChild("aircraft", --i, true);
 
-    if (hdg > 9990.0)
-        hdg = fgGetDouble("/environment/config/boundary/entry/wind-from-heading-deg", 270);
+    std::string fileName(p.file());
+    n = entry->getNode("file", true);
+    n->setStringValue(fileName);
+    n->setAttribute(SGPropertyNode::USERARCHIVE, true);
 
-    if ( !set_pos && !apt.empty() && !parkpos.empty() ) {
-        // An airport + parking position is requested
-        if ( fgSetPosFromAirportIDandParkpos( apt, parkpos ) ) {
-            // set tower position
-            fgSetString("/sim/tower/airport-id",  apt.c_str());
-            set_pos = true;
-        }
-    }
+    n = entry->getNode("path", true);
+    n->setStringValue(p.dir());
+    n->setAttribute(SGPropertyNode::USERARCHIVE, true);
 
-    if ( !set_pos && !apt.empty() && !rwy_no.empty() ) {
-        // An airport + runway is requested
-        if ( fgSetPosFromAirportIDandRwy( apt, rwy_no, rwy_req ) ) {
-            // set tower position (a little off the heading for single
-            // runway airports)
-	    fgSetString("/sim/tower/airport-id",  apt.c_str());
-            set_pos = true;
-        }
+    if ( boost::equals(fileName, _searchAircraft.c_str(), is_iequal()) ) {
+        _foundPath = p;
+        return true;
     }
 
-    if ( !set_pos && !apt.empty() ) {
-        // An airport is requested (find runway closest to hdg)
-        if ( fgSetPosFromAirportIDandHdg( apt, hdg ) ) {
-            // set tower position (a little off the heading for single
-            // runway airports)
-	    fgSetString("/sim/tower/airport-id",  apt.c_str());
-            set_pos = true;
-        }
-    }
+    return false;
+  }
+  
+  std::string _searchAircraft;
+  SGPath _foundPath;
+  SGPropertyNode* _cache;
+};
 
-    if (hdg_preset->getDoubleValue() > 9990.0)
-        hdg_preset->setDoubleValue(hdg);
+#ifdef _WIN32
+static SGPath platformDefaultDataPath()
+{
+  char *envp = ::getenv( "APPDATA" );
+  SGPath config( envp );
+  config.append( "flightgear.org" );
+  return config;
+}
+#elif __APPLE__
 
-    if ( !set_pos && !vor.empty() ) {
-        // a VOR is requested
-        if ( fgSetPosFromNAV( vor, vor_freq ) ) {
-            set_pos = true;
-        }
-    }
+#include <CoreServices/CoreServices.h>
 
-    if ( !set_pos && !ndb.empty() ) {
-        // an NDB is requested
-        if ( fgSetPosFromNAV( ndb, ndb_freq ) ) {
-            set_pos = true;
-        }
-    }
+static SGPath platformDefaultDataPath()
+{
+  FSRef ref;
+  OSErr err = FSFindFolder(kUserDomain, kApplicationSupportFolderType, false, &ref);
+  if (err) {
+    return SGPath();
+  }
+  
+  unsigned char path[1024];
+  if (FSRefMakePath(&ref, path, 1024) != noErr) {
+    return SGPath();
+  }
+  
+  SGPath appData;
+  appData.set((const char*) path);
+  appData.append("FlightGear");
+  return appData;
+}
+#else
+static SGPath platformDefaultDataPath()
+{
+  SGPath config( homedir );
+  config.append( ".fgfs" );
+  return config;
+}
+#endif
 
-    if ( !set_pos && !carrier.empty() ) {
-        // an aircraft carrier is requested
-        if ( fgSetPosFromCarrier( carrier, parkpos ) ) {
-            set_pos = true;
-        }
+// Read in configuration (file and command line)
+bool fgInitConfig ( int argc, char **argv )
+{
+    SGPath dataPath = platformDefaultDataPath();
+    
+    const char *fg_home = getenv("FG_HOME");
+    if (fg_home)
+      dataPath = fg_home;
+      
+    globals->set_fg_home(dataPath.c_str());
+    
+    simgear::Dir exportDir(simgear::Dir(dataPath).file("Export"));
+    if (!exportDir.exists()) {
+      exportDir.create(0777);
     }
+    
+    // Set /sim/fg-home and don't allow malign code to override it until
+    // Nasal security is set up.  Use FG_HOME if necessary.
+    SGPropertyNode *home = fgGetNode("/sim", true);
+    home->removeChild("fg-home", 0, false);
+    home = home->getChild("fg-home", 0, true);
+    home->setStringValue(dataPath.c_str());
+    home->setAttribute(SGPropertyNode::WRITE, false);
+  
+    flightgear::Options* options = flightgear::Options::sharedInstance();
+    options->init(argc, argv, dataPath);
+    bool loadDefaults = flightgear::Options::sharedInstance()->shouldLoadDefaultConfig();
+    if (loadDefaults) {
+      // Read global preferences from $FG_ROOT/preferences.xml
+      SG_LOG(SG_INPUT, SG_INFO, "Reading global preferences");
+      fgLoadProps("preferences.xml", globals->get_props());
+      SG_LOG(SG_INPUT, SG_INFO, "Finished Reading global preferences");
+
+      // do not load user settings when reset to default is requested
+      if (flightgear::Options::sharedInstance()->isOptionSet("restore-defaults"))
+      {
+          SG_LOG(SG_ALL, SG_ALERT, "Ignoring user settings. Restoring defaults.");
+      }
+      else
+      {
+          globals->loadUserSettings(dataPath);
+      }
+    } else {
+      SG_LOG(SG_GENERAL, SG_INFO, "not reading default configuration files");
+    }// of no-default-config selected
+  
+    // Scan user config files and command line for a specified aircraft.
+    options->initAircraft();
 
-    if ( !set_pos && !fix.empty() ) {
-        // a Fix is requested
-        if ( fgSetPosFromFix( fix ) ) {
-            set_pos = true;
-        }
+    FindAndCacheAircraft f(globals->get_props());
+    if (!f.loadAircraft()) {
+      return false;
     }
 
-    if ( !set_pos ) {
-        // No lon/lat specified, no airport specified, default to
-        // middle of KSFO field.
-        fgSetDouble("/sim/presets/longitude-deg", -122.374843);
-        fgSetDouble("/sim/presets/latitude-deg", 37.619002);
-    }
+    // parse options after loading aircraft to ensure any user
+    // overrides of defaults are honored.
+    options->processOptions();
+      
+    return true;
+}
 
-    fgSetDouble( "/position/longitude-deg",
-                 fgGetDouble("/sim/presets/longitude-deg") );
-    fgSetDouble( "/position/latitude-deg",
-                 fgGetDouble("/sim/presets/latitude-deg") );
-    fgSetDouble( "/orientation/heading-deg", hdg_preset->getDoubleValue());
 
-    // determine if this should be an on-ground or in-air start
-    if ((fabs(gs) > 0.01 || fabs(od) > 0.1 || alt > 0.1) && carrier.empty()) {
-        fgSetBool("/sim/presets/onground", false);
-    } else {
-        fgSetBool("/sim/presets/onground", true);
-    }
 
-    return true;
+/**
+ * Initialize vor/ndb/ils/fix list management and query systems (as
+ * well as simple airport db list)
+ * This is called multiple times in the case of a cache rebuild,
+ * to allow length caching to take place in the background, without
+ * blocking the main/UI thread.
+ */
+bool
+fgInitNav ()
+{
+  flightgear::NavDataCache* cache = flightgear::NavDataCache::instance();
+  static bool doingRebuild = false;
+  if (doingRebuild || cache->isRebuildRequired()) {
+    doingRebuild = true;
+    bool finished = cache->rebuild();
+    if (!finished) {
+      // sleep to give the rebuild thread more time
+      SGTimeStamp::sleepForMSec(50);
+      return false;
+    }
+  }
+  
+  FGTACANList *channellist = new FGTACANList;
+  globals->set_channellist( channellist );
+  
+  SGPath path(globals->get_fg_root());
+  path.append( "Navaids/TACAN_freq.dat" );
+  flightgear::loadTacan(path, channellist);
+  
+  return true;
 }
 
-
 // General house keeping initializations
 bool fgInitGeneral() {
     string root;
@@ -1193,273 +503,40 @@ bool fgInitGeneral() {
     }
     SG_LOG( SG_GENERAL, SG_INFO, "FG_ROOT = " << '"' << root << '"' << endl );
 
-    globals->set_browser(fgGetString("/sim/startup/browser-app", "firefox %u"));
+    // Note: browser command is hard-coded for Mac/Windows, so this only affects other platforms
+    globals->set_browser(fgGetString("/sim/startup/browser-app", WEB_BROWSER));
+    fgSetString("/sim/startup/browser-app", globals->get_browser());
 
-    char buf[512], *cwd = getcwd(buf, 511);
-    buf[511] = '\0';
+    simgear::Dir cwd(simgear::Dir::current());
     SGPropertyNode *curr = fgGetNode("/sim", true);
     curr->removeChild("fg-current", 0, false);
     curr = curr->getChild("fg-current", 0, true);
-    curr->setStringValue(cwd ? cwd : "");
+    curr->setStringValue(cwd.path().str());
     curr->setAttribute(SGPropertyNode::WRITE, false);
 
-    fgSetBool("/sim/startup/stdout-to-terminal", isatty(1));
-    fgSetBool("/sim/startup/stderr-to-terminal", isatty(2));
+    fgSetBool("/sim/startup/stdout-to-terminal", isatty(1) != 0 );
+    fgSetBool("/sim/startup/stderr-to-terminal", isatty(2) != 0 );
     return true;
 }
 
-
-// Initialize the flight model subsystem.  This just creates the
-// object.  The actual fdm initialization is delayed until we get a
-// proper scenery elevation hit.  This is checked for in main.cxx
-
-void fgInitFDM() {
-
-    if ( cur_fdm_state ) {
-        delete cur_fdm_state;
-        cur_fdm_state = 0;
-    }
-
-    double dt = 1.0 / fgGetInt("/sim/model-hz");
-    string model = fgGetString("/sim/flight-model");
-
-    if ( model == "larcsim" ) {
-        cur_fdm_state = new FGLaRCsim( dt );
-    } else if ( model == "jsb" ) {
-        cur_fdm_state = new FGJSBsim( dt );
-#if ENABLE_SP_FDM
-    } else if ( model == "ada" ) {
-        cur_fdm_state = new FGADA( dt );
-    } else if ( model == "acms" ) {
-        cur_fdm_state = new FGACMS( dt );
-    } else if ( model == "balloon" ) {
-        cur_fdm_state = new FGBalloonSim( dt );
-    } else if ( model == "magic" ) {
-        cur_fdm_state = new FGMagicCarpet( dt );
-#endif
-    } else if ( model == "ufo" ) {
-        cur_fdm_state = new FGUFO( dt );
-    } else if ( model == "external" ) {
-        // external is a synonym for "--fdm=null" and is
-        // maintained here for backwards compatibility
-        cur_fdm_state = new FGNullFDM( dt );
-    } else if ( model.find("network") == 0 ) {
-        string host = "localhost";
-        int port1 = 5501;
-        int port2 = 5502;
-        int port3 = 5503;
-        string net_options = model.substr(8);
-        string::size_type begin, end;
-        begin = 0;
-        // host
-        end = net_options.find( ",", begin );
-        if ( end != string::npos ) {
-            host = net_options.substr(begin, end - begin);
-            begin = end + 1;
-        }
-        // port1
-        end = net_options.find( ",", begin );
-        if ( end != string::npos ) {
-            port1 = atoi( net_options.substr(begin, end - begin).c_str() );
-            begin = end + 1;
-        }
-        // port2
-        end = net_options.find( ",", begin );
-        if ( end != string::npos ) {
-            port2 = atoi( net_options.substr(begin, end - begin).c_str() );
-            begin = end + 1;
-        }
-        // port3
-        end = net_options.find( ",", begin );
-        if ( end != string::npos ) {
-            port3 = atoi( net_options.substr(begin, end - begin).c_str() );
-            begin = end + 1;
-        }
-        cur_fdm_state = new FGExternalNet( dt, host, port1, port2, port3 );
-    } else if ( model.find("pipe") == 0 ) {
-        // /* old */ string pipe_path = model.substr(5);
-        // /* old */ cur_fdm_state = new FGExternalPipe( dt, pipe_path );
-        string pipe_path = "";
-        string pipe_protocol = "";
-        string pipe_options = model.substr(5);
-        string::size_type begin, end;
-        begin = 0;
-        // pipe file path
-        end = pipe_options.find( ",", begin );
-        if ( end != string::npos ) {
-            pipe_path = pipe_options.substr(begin, end - begin);
-            begin = end + 1;
-        }
-        // protocol (last option)
-        pipe_protocol = pipe_options.substr(begin);
-        cur_fdm_state = new FGExternalPipe( dt, pipe_path, pipe_protocol );
-    } else if ( model == "null" ) {
-        cur_fdm_state = new FGNullFDM( dt );
-    } else if ( model == "yasim" ) {
-        cur_fdm_state = new YASim( dt );
-    } else {
-        throw sg_exception(string("Unrecognized flight model '") + model
-               + "', cannot init flight dynamics model.");
-    }
-}
-
-// Initialize view parameters
-void fgInitView() {
-  // force update of model so that viewer can get some data...
-  globals->get_aircraft_model()->update(0);
-  // run update for current view so that data is current...
-  globals->get_viewmgr()->update(0);
-}
-
-
-SGTime *fgInitTime() {
-    // Initialize time
-    static const SGPropertyNode *longitude
-        = fgGetNode("/position/longitude-deg");
-    static const SGPropertyNode *latitude
-        = fgGetNode("/position/latitude-deg");
-    static const SGPropertyNode *cur_time_override
-        = fgGetNode("/sim/time/cur-time-override", true);
-
-    SGPath zone( globals->get_fg_root() );
-    zone.append( "Timezone" );
-    SGTime *t = new SGTime( longitude->getDoubleValue()
-                              * SGD_DEGREES_TO_RADIANS,
-                            latitude->getDoubleValue()
-                              * SGD_DEGREES_TO_RADIANS,
-                            zone.str(),
-                            cur_time_override->getLongValue() );
-
-    globals->set_warp_delta( 0 );
-
-    t->update( 0.0, 0.0,
-               cur_time_override->getLongValue(),
-               globals->get_warp() );
-
-    return t;
-}
-
-
-// set up a time offset (aka warp) if one is specified
-void fgInitTimeOffset() {
-    static const SGPropertyNode *longitude
-        = fgGetNode("/position/longitude-deg");
-    static const SGPropertyNode *latitude
-        = fgGetNode("/position/latitude-deg");
-    static const SGPropertyNode *cur_time_override
-        = fgGetNode("/sim/time/cur-time-override", true);
-
-    // Handle potential user specified time offsets
-    int orig_warp = globals->get_warp();
-    SGTime *t = globals->get_time_params();
-    time_t cur_time = t->get_cur_time();
-    time_t currGMT = sgTimeGetGMT( gmtime(&cur_time) );
-    time_t systemLocalTime = sgTimeGetGMT( localtime(&cur_time) );
-    time_t aircraftLocalTime = 
-        sgTimeGetGMT( fgLocaltime(&cur_time, t->get_zonename() ) );
-    
-    // Okay, we now have several possible scenarios
-    int offset = fgGetInt("/sim/startup/time-offset");
-    string offset_type = fgGetString("/sim/startup/time-offset-type");
-
-    int warp = 0;
-    if ( offset_type == "real" ) {
-        warp = 0;
-    } else if ( offset_type == "dawn" ) {
-        warp = fgTimeSecondsUntilSunAngle( cur_time,
-                                           longitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           latitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           90.0, true ); 
-    } else if ( offset_type == "morning" ) {
-        warp = fgTimeSecondsUntilSunAngle( cur_time,
-                                           longitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           latitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           75.0, true ); 
-    } else if ( offset_type == "noon" ) {
-        warp = fgTimeSecondsUntilSunAngle( cur_time,
-                                           longitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           latitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           0.0, true ); 
-    } else if ( offset_type == "afternoon" ) {
-        warp = fgTimeSecondsUntilSunAngle( cur_time,
-                                           longitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           latitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           60.0, false ); 
-     } else if ( offset_type == "dusk" ) {
-        warp = fgTimeSecondsUntilSunAngle( cur_time,
-                                           longitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           latitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           90.0, false ); 
-     } else if ( offset_type == "evening" ) {
-        warp = fgTimeSecondsUntilSunAngle( cur_time,
-                                           longitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           latitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           100.0, false ); 
-    } else if ( offset_type == "midnight" ) {
-        warp = fgTimeSecondsUntilSunAngle( cur_time,
-                                           longitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           latitude->getDoubleValue()
-                                             * SGD_DEGREES_TO_RADIANS,
-                                           180.0, false ); 
-    } else if ( offset_type == "system-offset" ) {
-        warp = offset;
-	orig_warp = 0;
-    } else if ( offset_type == "gmt-offset" ) {
-        warp = offset - (currGMT - systemLocalTime);
-	orig_warp = 0;
-    } else if ( offset_type == "latitude-offset" ) {
-        warp = offset - (aircraftLocalTime - systemLocalTime);
-	orig_warp = 0;
-    } else if ( offset_type == "system" ) {
-      warp = offset - (systemLocalTime - currGMT) - cur_time;
-    } else if ( offset_type == "gmt" ) {
-        warp = offset - cur_time;
-    } else if ( offset_type == "latitude" ) {
-        warp = offset - (aircraftLocalTime - currGMT)- cur_time; 
-    } else {
-        SG_LOG( SG_GENERAL, SG_ALERT,
-                "FG_TIME::Unsupported offset type " << offset_type );
-        exit( -1 );
-    }
-    globals->set_warp( orig_warp + warp );
-    t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
-               latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
-               cur_time_override->getLongValue(),
-               globals->get_warp() );
-
-    SG_LOG( SG_GENERAL, SG_INFO, "After fgInitTimeOffset(): warp = " 
-            << globals->get_warp() );
-}
-
-
 // This is the top level init routine which calls all the other
 // initialization routines.  If you are adding a subsystem to flight
 // gear, its initialization call should located in this routine.
 // Returns non-zero if a problem encountered.
-bool fgInitSubsystems() {
-    // static const SGPropertyNode *longitude
-    //     = fgGetNode("/sim/presets/longitude-deg");
-    // static const SGPropertyNode *latitude
-    //     = fgGetNode("/sim/presets/latitude-deg");
-    // static const SGPropertyNode *altitude
-    //     = fgGetNode("/sim/presets/altitude-ft");
-
-    SG_LOG( SG_GENERAL, SG_INFO, "Initialize Subsystems");
+void fgCreateSubsystems() {
+
+    SG_LOG( SG_GENERAL, SG_INFO, "Creating Subsystems");
     SG_LOG( SG_GENERAL, SG_INFO, "========== ==========");
 
+    ////////////////////////////////////////////////////////////////////
+    // Initialize the sound subsystem.
+    ////////////////////////////////////////////////////////////////////
+    // Sound manager uses an own subsystem group "SOUND" which is the last
+    // to be updated in every loop.
+    // Sound manager is updated last so it can use the CPU while the GPU
+    // is processing the scenery (doubled the frame-rate for me) -EMH-
+    globals->add_subsystem("sound", new FGSoundManager, SGSubsystemMgr::SOUND);
+
     ////////////////////////////////////////////////////////////////////
     // Initialize the event manager subsystem.
     ////////////////////////////////////////////////////////////////////
@@ -1479,15 +556,24 @@ bool fgInitSubsystems() {
     ////////////////////////////////////////////////////////////////////
     globals->add_subsystem("properties", new FGProperties);
 
+
+    ////////////////////////////////////////////////////////////////////
+    // Add the performance monitoring system.
+    ////////////////////////////////////////////////////////////////////
+    globals->add_subsystem("performance-mon",
+            new SGPerformanceMonitor(globals->get_subsystem_mgr(),
+                                     fgGetNode("/sim/performance-monitor", true)));
+
     ////////////////////////////////////////////////////////////////////
     // Initialize the material property subsystem.
     ////////////////////////////////////////////////////////////////////
 
     SGPath mpath( globals->get_fg_root() );
-    mpath.append( "materials.xml" );
+    mpath.append( fgGetString("/sim/rendering/materials-file") );
     if ( ! globals->get_matlib()->load(globals->get_fg_root(), mpath.str(),
             globals->get_props()) ) {
-        SG_LOG( SG_GENERAL, SG_ALERT, "Error loading material lib!" );
+        SG_LOG( SG_GENERAL, SG_ALERT,
+                "Error loading materials file " << mpath.str() );
         exit(-1);
     }
 
@@ -1496,16 +582,6 @@ bool fgInitSubsystems() {
     // Initialize the scenery management subsystem.
     ////////////////////////////////////////////////////////////////////
 
-    if ( globals->get_tile_mgr()->init() ) {
-        // Load the local scenery data
-        double visibility_meters = fgGetDouble("/environment/visibility-m");
-                
-        globals->get_tile_mgr()->update( visibility_meters );
-    } else {
-        SG_LOG( SG_GENERAL, SG_ALERT, "Error in Tile Manager initialization!" );
-        exit(-1);
-    }
-
     globals->get_scenery()->get_scene_graph()
         ->addChild(simgear::Particles::getCommonRoot());
     simgear::GlobalParticleCallback::setSwitch(fgGetNode("/sim/rendering/particles", true));
@@ -1514,12 +590,7 @@ bool fgInitSubsystems() {
     // Initialize the flight model subsystem.
     ////////////////////////////////////////////////////////////////////
 
-    fgInitFDM();
-        
-    // allocates structures so must happen before any of the flight
-    // model or control parameters are set
-    fgAircraftInit();   // In the future this might not be the case.
-
+    globals->add_subsystem("flight", new FDMShell, SGSubsystemMgr::FDM);
 
     ////////////////////////////////////////////////////////////////////
     // Initialize the weather subsystem.
@@ -1527,35 +598,25 @@ bool fgInitSubsystems() {
 
     // Initialize the weather modeling subsystem
     globals->add_subsystem("environment", new FGEnvironmentMgr);
-
-    ////////////////////////////////////////////////////////////////////
-    // Initialize the ridge lift simulation.
-    ////////////////////////////////////////////////////////////////////
-
-    // Initialize the ridgelift subsystem
-    globals->add_subsystem("ridgelift", new FGRidgeLift);
-
+    globals->add_subsystem("ephemeris", new Ephemeris);
+    
     ////////////////////////////////////////////////////////////////////
     // Initialize the aircraft systems and instrumentation (before the
     // autopilot.)
     ////////////////////////////////////////////////////////////////////
 
-    globals->add_subsystem("instrumentation", new FGInstrumentMgr);
-    globals->add_subsystem("systems", new FGSystemMgr);
-
+    globals->add_subsystem("systems", new FGSystemMgr, SGSubsystemMgr::FDM);
+    globals->add_subsystem("instrumentation", new FGInstrumentMgr, SGSubsystemMgr::FDM);
+    globals->add_subsystem("hud", new HUD, SGSubsystemMgr::DISPLAY);
+    globals->add_subsystem("cockpit-displays", new flightgear::CockpitDisplayManager, SGSubsystemMgr::DISPLAY);
+  
     ////////////////////////////////////////////////////////////////////
     // Initialize the XML Autopilot subsystem.
     ////////////////////////////////////////////////////////////////////
 
-    globals->add_subsystem( "xml-autopilot", new FGXMLAutopilotGroup );
+    globals->add_subsystem( "xml-autopilot", FGXMLAutopilotGroup::createInstance("autopilot"), SGSubsystemMgr::FDM );
+    globals->add_subsystem( "xml-proprules", FGXMLAutopilotGroup::createInstance("property-rule"), SGSubsystemMgr::GENERAL );
     globals->add_subsystem( "route-manager", new FGRouteMgr );
-    globals->add_subsystem( "autobrake", new FGAutoBrake );
-    
-    ////////////////////////////////////////////////////////////////////
-    // Initialize the view manager subsystem.
-    ////////////////////////////////////////////////////////////////////
-
-    fgInitView();
 
     ////////////////////////////////////////////////////////////////////
     // Initialize the Input-Output subsystem
@@ -1574,108 +635,71 @@ bool fgInitSubsystems() {
 
     globals->add_subsystem("gui", new NewGUI, SGSubsystemMgr::INIT);
 
-
-    ////////////////////////////////////////////////////////////////////
-    // Initialize the local time subsystem.
-    ////////////////////////////////////////////////////////////////////
-
-    // update the current timezone each 30 minutes
-    globals->get_event_mgr()->addTask( "fgUpdateLocalTime()",
-                                       &fgUpdateLocalTime, 30*60 );
-    fgInitTimeOffset();		// the environment subsystem needs this
-
-
-    ////////////////////////////////////////////////////////////////////
-    // Initialize the lighting subsystem.
-    ////////////////////////////////////////////////////////////////////
-
-    globals->add_subsystem("lighting", new FGLight);
-
     //////////////////////////////////////////////////////////////////////
     // Initialize the 2D cloud subsystem.
     ////////////////////////////////////////////////////////////////////
     fgGetBool("/sim/rendering/bump-mapping", false);
 
-#ifdef ENABLE_AUDIO_SUPPORT
     ////////////////////////////////////////////////////////////////////
-    // Initialize the sound-effects subsystem.
+    // Initialize the canvas 2d drawing subsystem.
     ////////////////////////////////////////////////////////////////////
-    globals->add_subsystem("voice", new FGVoiceMgr);
-#endif
+    globals->add_subsystem("Canvas", new CanvasMgr, SGSubsystemMgr::DISPLAY);
+    globals->add_subsystem("CanvasGUI", new GUIMgr, SGSubsystemMgr::DISPLAY);
 
     ////////////////////////////////////////////////////////////////////
-    // Initialise the ATC Manager 
+    // Initialise the ATIS Manager
+    // Note that this is old stuff, but is necessary for the
+    // current ATIS implementation. Therefore, leave it in here
+    // until the ATIS system is ported over to make use of the ATIS 
+    // sub system infrastructure.
     ////////////////////////////////////////////////////////////////////
 
-#if ENABLE_ATCDCL
-    SG_LOG(SG_GENERAL, SG_INFO, "  ATC Manager");
-    globals->set_ATC_mgr(new FGATCMgr);
-    globals->get_ATC_mgr()->init(); 
+    globals->add_subsystem("ATIS", new FGATISMgr, SGSubsystemMgr::INIT, 0.4);
 
     ////////////////////////////////////////////////////////////////////
-    // Initialise the AI Manager 
+   // Initialize the ATC subsystem
     ////////////////////////////////////////////////////////////////////
+    globals->add_subsystem("ATC", new FGATCManager, SGSubsystemMgr::POST_FDM);
+
+    ////////////////////////////////////////////////////////////////////
+    // Initialize multiplayer subsystem
+    ////////////////////////////////////////////////////////////////////
+
+    globals->add_subsystem("mp", new FGMultiplayMgr, SGSubsystemMgr::POST_FDM);
 
-    SG_LOG(SG_GENERAL, SG_INFO, "  AI Manager");
-    globals->set_AI_mgr(new FGAIMgr);
-    globals->get_AI_mgr()->init();
-#endif
     ////////////////////////////////////////////////////////////////////
     // Initialise the AI Model Manager
     ////////////////////////////////////////////////////////////////////
     SG_LOG(SG_GENERAL, SG_INFO, "  AI Model Manager");
-    globals->add_subsystem("ai_model", new FGAIManager);
-    globals->add_subsystem("submodel_mgr", new FGSubmodelMgr);
+    globals->add_subsystem("ai-model", new FGAIManager, SGSubsystemMgr::POST_FDM);
+    globals->add_subsystem("submodel-mgr", new FGSubmodelMgr, SGSubsystemMgr::POST_FDM);
 
 
     // It's probably a good idea to initialize the top level traffic manager
     // After the AI and ATC systems have been initialized properly.
     // AI Traffic manager
-    globals->add_subsystem("Traffic Manager", new FGTrafficManager);
-
-
-    ////////////////////////////////////////////////////////////////////
-    // Initialize the cockpit subsystem
-    ////////////////////////////////////////////////////////////////////
-    if( fgCockpitInit( &current_aircraft )) {
-        // Cockpit initialized ok.
-    } else {
-        SG_LOG( SG_GENERAL, SG_ALERT, "Error in Cockpit initialization!" );
-        exit(-1);
-    }
-
+    globals->add_subsystem("traffic-manager", new FGTrafficManager, SGSubsystemMgr::POST_FDM);
 
     ////////////////////////////////////////////////////////////////////
     // Add a new 2D panel.
     ////////////////////////////////////////////////////////////////////
 
-    string panel_path = fgGetString("/sim/panel/path",
-                                    "Panels/Default/default.xml");
-
-    globals->set_current_panel( fgReadPanel(panel_path) );
-    if (globals->get_current_panel() == 0) {
-        SG_LOG( SG_INPUT, SG_ALERT,
-                "Error reading new panel from " << panel_path );
-    } else {
-        SG_LOG( SG_INPUT, SG_INFO, "Loaded new panel from " << panel_path );
-        globals->get_current_panel()->init();
-        globals->get_current_panel()->bind();
-    }
-
-
+    fgSetArchivable("/sim/panel/visibility");
+    fgSetArchivable("/sim/panel/x-offset");
+    fgSetArchivable("/sim/panel/y-offset");
+    fgSetArchivable("/sim/panel/jitter");
+  
     ////////////////////////////////////////////////////////////////////
     // Initialize the controls subsystem.
     ////////////////////////////////////////////////////////////////////
-
-    globals->get_controls()->init();
-    globals->get_controls()->bind();
-
+    
+    globals->add_subsystem("controls", new FGControls, SGSubsystemMgr::GENERAL);
 
     ////////////////////////////////////////////////////////////////////
     // Initialize the input subsystem.
     ////////////////////////////////////////////////////////////////////
 
-    globals->add_subsystem("input", new FGInput);
+    globals->add_subsystem("input", new FGInput, SGSubsystemMgr::GENERAL);
 
 
     ////////////////////////////////////////////////////////////////////
@@ -1683,21 +707,38 @@ bool fgInitSubsystems() {
     ////////////////////////////////////////////////////////////////////
     globals->add_subsystem("replay", new FGReplay);
 
-
+#ifdef ENABLE_AUDIO_SUPPORT
     ////////////////////////////////////////////////////////////////////
-    // Bind and initialize subsystems.
+    // Initialize the sound-effects subsystem.
     ////////////////////////////////////////////////////////////////////
-
-    globals->get_subsystem_mgr()->bind();
-    globals->get_subsystem_mgr()->init();
+    globals->add_subsystem("voice", new FGVoiceMgr, SGSubsystemMgr::DISPLAY);
+#endif
 
     ////////////////////////////////////////////////////////////////////
-    // Initialize multiplayer subsystem
+    // Initialize the lighting subsystem.
     ////////////////////////////////////////////////////////////////////
 
-    globals->set_multiplayer_mgr(new FGMultiplayMgr);
-    globals->get_multiplayer_mgr()->init();
+    globals->add_subsystem("lighting", new FGLight, SGSubsystemMgr::DISPLAY);
+    
+    // ordering here is important : Nasal (via events), then models, then views
+    globals->add_subsystem("events", globals->get_event_mgr(), SGSubsystemMgr::DISPLAY);
+
+    globals->add_subsystem("aircraft-model", new FGAircraftModel, SGSubsystemMgr::DISPLAY);
+    globals->add_subsystem("model-manager", new FGModelMgr, SGSubsystemMgr::DISPLAY);
+
+    FGViewMgr *viewmgr = new FGViewMgr;
+    globals->set_viewmgr( viewmgr );
+    globals->add_subsystem("view-manager", viewmgr, SGSubsystemMgr::DISPLAY);
+
+    globals->add_subsystem("tile-manager", globals->get_tile_mgr(), 
+      SGSubsystemMgr::DISPLAY);
+}
 
+void fgPostInitSubsystems()
+{
+    SGTimeStamp st;
+    st.stamp();
+  
     ////////////////////////////////////////////////////////////////////////
     // Initialize the Nasal interpreter.
     // Do this last, so that the loaded scripts see initialized state
@@ -1705,68 +746,105 @@ bool fgInitSubsystems() {
     FGNasalSys* nasal = new FGNasalSys();
     globals->add_subsystem("nasal", nasal, SGSubsystemMgr::INIT);
     nasal->init();
-
+    SG_LOG(SG_GENERAL, SG_INFO, "Nasal init took:" << st.elapsedMSec());
+  
     // initialize methods that depend on other subsystems.
+    st.stamp();
     globals->get_subsystem_mgr()->postinit();
+    SG_LOG(SG_GENERAL, SG_INFO, "Subsystems postinit took:" << st.elapsedMSec());
+  
+    ////////////////////////////////////////////////////////////////////
+    // TODO FIXME! UGLY KLUDGE!
+    ////////////////////////////////////////////////////////////////////
+    {
+        /* Scenarios require Nasal, so FGAIManager loads the scenarios,
+         * including its models such as a/c carriers, in its 'postinit',
+         * which is the very last thing we do.
+         * flightgear::initPosition is called very early in main.cxx/fgIdleFunction,
+         * one of the first things we do, long before scenarios/carriers are
+         * loaded. => When requested "initial preset position" relates to a
+         * carrier, recalculate the 'initial' position here (how have things
+         * ever worked before this hack - this init sequence has always been
+         * this way...?)*/
+        std::string carrier = fgGetString("/sim/presets/carrier","");
+        if (carrier != "")
+        {
+            // clear preset location and re-trigger position setup
+            fgSetDouble("/sim/presets/longitude-deg", 9999);
+            fgSetDouble("/sim/presets/latitude-deg", 9999);
+            flightgear::initPosition();
+        }
+    }
 
     ////////////////////////////////////////////////////////////////////////
     // End of subsystem initialization.
     ////////////////////////////////////////////////////////////////////
 
+    fgSetBool("/sim/crashed", false);
+    fgSetBool("/sim/initialized", true);
+
     SG_LOG( SG_GENERAL, SG_INFO, endl);
 
                                 // Save the initial state for future
                                 // reference.
     globals->saveInitialState();
-    
-    return true;
 }
 
-
+// Reset: this is what the 'reset' command (and hence, GUI) is attached to
 void fgReInitSubsystems()
 {
-    // static const SGPropertyNode *longitude
-    //     = fgGetNode("/sim/presets/longitude-deg");
-    // static const SGPropertyNode *latitude
-    //     = fgGetNode("/sim/presets/latitude-deg");
-    static const SGPropertyNode *altitude
-        = fgGetNode("/sim/presets/altitude-ft");
     static const SGPropertyNode *master_freeze
         = fgGetNode("/sim/freeze/master");
 
-    SG_LOG( SG_GENERAL, SG_INFO,
-            "fgReInitSubsystems(): /position/altitude = "
-            << altitude->getDoubleValue() );
+    SG_LOG( SG_GENERAL, SG_INFO, "fgReInitSubsystems()");
 
+// setup state to begin re-init
     bool freeze = master_freeze->getBoolValue();
     if ( !freeze ) {
         fgSetBool("/sim/freeze/master", true);
     }
+    
+    fgSetBool("/sim/signals/reinit", true);
     fgSetBool("/sim/crashed", false);
 
+// do actual re-init steps
+    globals->get_subsystem("flight")->unbind();
+    
+  // reset control state, before restoring initial state; -set or config files
+  // may specify values for flaps, trim tabs, magnetos, etc
+    globals->get_controls()->reset_all();
+        
+    globals->restoreInitialState();
+
+    // update our position based on current presets
+    flightgear::initPosition();
+    
     // Force reupdating the positions of the ai 3d models. They are used for
     // initializing ground level for the FDM.
-    globals->get_subsystem("ai_model")->reinit();
+    globals->get_subsystem("ai-model")->reinit();
 
     // Initialize the FDM
-    fgInitFDM();
-    
-    // allocates structures so must happen before any of the flight
-    // model or control parameters are set
-    fgAircraftInit();   // In the future this might not be the case.
+    globals->get_subsystem("flight")->reinit();
 
+    // reset replay buffers
+    globals->get_subsystem("replay")->reinit();
+    
     // reload offsets from config defaults
     globals->get_viewmgr()->reinit();
 
-    fgInitView();
+    globals->get_subsystem("time")->reinit();
 
-    globals->get_controls()->reset_all();
+    // need to bind FDMshell again, since we manually unbound it above...
+    globals->get_subsystem("flight")->bind();
 
-    fgUpdateLocalTime();
+    // need to reset aircraft (systems/instruments) so they can adapt to current environment
+    globals->get_subsystem("systems")->reinit();
+    globals->get_subsystem("instrumentation")->reinit();
 
-    // re-init to proper time of day setting
-    fgInitTimeOffset();
+    globals->get_subsystem("ATIS")->reinit();
 
+// setup state to end re-init
+    fgSetBool("/sim/signals/reinit", false);
     if ( !freeze ) {
         fgSetBool("/sim/freeze/master", false);
     }
@@ -1774,58 +852,119 @@ void fgReInitSubsystems()
 }
 
 
-void reInit(void)  // from gui_local.cxx -- TODO merge with fgReInitSubsystems()
+///////////////////////////////////////////////////////////////////////////////
+// helper object to implement the --show-aircraft command.
+// resides here so we can share the fgFindAircraftInDir template above,
+// and hence ensure this command lists exectly the same aircraft as the normal
+// loading path.
+class ShowAircraft 
 {
-    static SGPropertyNode_ptr master_freeze = fgGetNode("/sim/freeze/master", true);
-
-    bool freeze = master_freeze->getBoolValue();
-    if (!freeze)
-        master_freeze->setBoolValue(true);
-
-    fgSetBool("/sim/signals/reinit", true);
-    cur_fdm_state->unbind();
-
-    // in case user has changed window size as
-    // restoreInitialState() overwrites these
-    int xsize = fgGetInt("/sim/startup/xsize");
-    int ysize = fgGetInt("/sim/startup/ysize");
-
-    // viewports also needs to be saved/restored as
-    // restoreInitialState() overwrites these
-    SGPropertyNode *guiNode = new SGPropertyNode;
-    SGPropertyNode *cameraNode = new SGPropertyNode;
-    SGPropertyNode *cameraGroupNode = fgGetNode("/sim/rendering/camera-group");
-    copyProperties(cameraGroupNode->getChild("camera"), cameraNode);
-    copyProperties(cameraGroupNode->getChild("gui"), guiNode);
+public:
+  ShowAircraft()
+  {
+    _minStatus = getNumMaturity(fgGetString("/sim/aircraft-min-status", "all"));
+  }
+  
+  
+  void show(const SGPath& path)
+  {
+    fgFindAircraftInDir(path, this, &ShowAircraft::processAircraft);
+  
+    std::sort(_aircraft.begin(), _aircraft.end(), ciLessLibC());
+    SG_LOG( SG_GENERAL, SG_ALERT, "" ); // To popup the console on Windows
+    cout << "Available aircraft:" << endl;
+    for ( unsigned int i = 0; i < _aircraft.size(); i++ ) {
+        cout << _aircraft[i] << endl;
+    }
+  }
+  
+private:
+  bool processAircraft(const SGPath& path)
+  {
+    SGPropertyNode root;
+    try {
+       readProperties(path.str(), &root);
+    } catch (sg_exception& ) {
+       return false;
+    }
+  
+    int maturity = 0;
+    string descStr("   ");
+    descStr += path.file();
+  // trim common suffix from file names
+    int nPos = descStr.rfind("-set.xml");
+    if (nPos == (int)(descStr.size() - 8)) {
+      descStr.resize(nPos);
+    }
+    
+    SGPropertyNode *node = root.getNode("sim");
+    if (node) {
+      SGPropertyNode* desc = node->getNode("description");
+      // if a status tag is found, read it in
+      if (node->hasValue("status")) {
+        maturity = getNumMaturity(node->getStringValue("status"));
+      }
+      
+      if (desc) {
+        if (descStr.size() <= 27+3) {
+          descStr.append(29+3-descStr.size(), ' ');
+        } else {
+          descStr += '\n';
+          descStr.append( 32, ' ');
+        }
+        descStr += desc->getStringValue();
+      }
+    } // of have 'sim' node
+    
+    if (maturity < _minStatus) {
+      return false;
+    }
 
-    globals->restoreInitialState();
+    _aircraft.push_back(descStr);
+    return false;
+  }
 
-    // update our position based on current presets
-    fgInitPosition();
 
-    // We don't know how to resize the window, so keep the last values
-    //  for xsize and ysize, and don't use the one set initially
-    fgSetInt("/sim/startup/xsize", xsize);
-    fgSetInt("/sim/startup/ysize", ysize);
+  int getNumMaturity(const char * str) 
+  {
+    // changes should also be reflected in $FG_ROOT/data/options.xml & 
+    // $FG_ROOT/data/Translations/string-default.xml
+    const char* levels[] = {"alpha","beta","early-production","production"}; 
 
-    copyProperties(cameraNode, cameraGroupNode->getChild("camera"));
-    copyProperties(guiNode, cameraGroupNode->getChild("gui"));
+    if (!strcmp(str, "all")) {
+      return 0;
+    }
 
-    delete guiNode;
-    delete cameraNode;
+    for (size_t i=0; i<(sizeof(levels)/sizeof(levels[0]));i++) 
+      if (strcmp(str,levels[i])==0)
+        return i;
 
-    SGTime *t = globals->get_time_params();
-    delete t;
-    t = fgInitTime();
-    globals->set_time_params(t);
+    return 0;
+  }
 
-    fgReInitSubsystems();
+  // recommended in Meyers, Effective STL when internationalization and embedded
+  // NULLs aren't an issue.  Much faster than the STL or Boost lex versions.
+  struct ciLessLibC : public std::binary_function<string, string, bool>
+  {
+    bool operator()(const std::string &lhs, const std::string &rhs) const
+    {
+      return strcasecmp(lhs.c_str(), rhs.c_str()) < 0 ? 1 : 0;
+    }
+  };
 
-    globals->get_tile_mgr()->update(fgGetDouble("/environment/visibility-m"));
-    globals->get_renderer()->resize(xsize, ysize);
-    fgSetBool("/sim/signals/reinit", false);
+  int _minStatus;
+  string_list _aircraft;
+};
 
-    if (!freeze)
-        master_freeze->setBoolValue(false);
+void fgShowAircraft(const SGPath &path)
+{
+    ShowAircraft s;
+    s.show(path);
+        
+#ifdef _MSC_VER
+    cout << "Hit a key to continue..." << endl;
+    cin.get();
+#endif
 }
 
+