X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FMain%2Ffg_commands.cxx;h=cf5efb8a5df4dc4e0a9d3fe3c3ee6edf99b414c3;hb=18d1593c42c2df60d7fb44ace722ca3e8a7fd82c;hp=9c621a132b7721db0c3f2c01b2b90b46af82f652;hpb=a7e56cf399893a603bea83b2391387ae6242f4fb;p=flightgear.git

diff --git a/src/Main/fg_commands.cxx b/src/Main/fg_commands.cxx
index 9c621a132..cf5efb8a5 100644
--- a/src/Main/fg_commands.cxx
+++ b/src/Main/fg_commands.cxx
@@ -1,38 +1,54 @@
 // fg_commands.cxx - internal FGFS commands.
 
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
 #include <string.h>		// strcmp()
 
 #include <simgear/compiler.h>
-#include <simgear/misc/exception.hxx>
 
-#include STL_STRING
-#include STL_FSTREAM
+#include <string>
+#include <fstream>
 
+#include <simgear/sg_inlines.h>
 #include <simgear/debug/logstream.hxx>
-#include <simgear/misc/commands.hxx>
-#include <simgear/misc/props.hxx>
+#include <simgear/math/sg_random.h>
+#include <simgear/scene/material/mat.hxx>
+#include <simgear/structure/exception.hxx>
+#include <simgear/structure/commands.hxx>
+#include <simgear/props/props.hxx>
+#include <simgear/structure/event_mgr.hxx>
 
 #include <Cockpit/panel.hxx>
 #include <Cockpit/panel_io.hxx>
+#include <Cockpit/hud.hxx>
+#include <Environment/environment.hxx>
 #include <FDM/flight.hxx>
 #include <GUI/gui.h>
 #include <GUI/new_gui.hxx>
+#include <GUI/dialog.hxx>
+#include <Aircraft/replay.hxx>
 #include <Scenery/tilemgr.hxx>
+#include <Scenery/scenery.hxx>
+#include <Scripting/NasalSys.hxx>
+#include <Sound/fg_fx.hxx>
+#include <Time/sunsolver.hxx>
 #include <Time/tmp.hxx>
 
 #include "fg_init.hxx"
+#include "fg_io.hxx"
 #include "fg_commands.hxx"
-
-SG_USING_STD(string);
-#if !defined(SG_HAVE_NATIVE_SGI_COMPILERS)
-SG_USING_STD(ifstream);
-SG_USING_STD(ofstream);
-#endif
-
 #include "fg_props.hxx"
-#include "fg_io.hxx"
 #include "globals.hxx"
+#include "logger.hxx"
+#include "util.hxx"
 #include "viewmgr.hxx"
+#include "main.hxx"
+
+using std::string;
+using std::ifstream;
+using std::ofstream;
 
 
 
@@ -41,34 +57,95 @@ SG_USING_STD(ofstream);
 ////////////////////////////////////////////////////////////////////////
 
 
+static inline SGPropertyNode *
+get_prop (const SGPropertyNode * arg)
+{
+    return fgGetNode(arg->getStringValue("property[0]", "/null"), true);
+}
+
+static inline SGPropertyNode *
+get_prop2 (const SGPropertyNode * arg)
+{
+    return fgGetNode(arg->getStringValue("property[1]", "/null"), true);
+}
+
+
 /**
- * Template function to wrap a value.
+ * Get a double value and split it as required.
  */
-template <class T>
-static inline void
-do_wrap (T * value, T min, T max)
+static void
+split_value (double full_value, const char * mask,
+             double * unmodifiable, double * modifiable)
 {
-    if (min >= max) {           // basic sanity check
-        *value = min;
+    if (!strcmp("integer", mask)) {
+        *modifiable = (full_value < 0 ? ceil(full_value) : floor (full_value));
+        *unmodifiable = full_value - *modifiable;
+    } else if (!strcmp("decimal", mask)) {
+        *unmodifiable = (full_value < 0 ? ceil(full_value) : floor(full_value));
+        *modifiable = full_value - *unmodifiable;
     } else {
-        T range = max - min;
-        while (*value < min)
-            *value += range;
-        while (*value > max)
-            *value -= range;
+        if (strcmp("all", mask))
+            SG_LOG(SG_GENERAL, SG_ALERT, "Bad value " << mask << " for mask;"
+                   << " assuming 'all'");
+        *unmodifiable = 0;
+        *modifiable = full_value;
     }
 }
 
-static inline SGPropertyNode *
-get_prop (const SGPropertyNode * arg)
+
+/**
+ * Clamp or wrap a value as specified.
+ */
+static void
+limit_value (double * value, const SGPropertyNode * arg)
 {
-    return fgGetNode(arg->getStringValue("property[0]", "/null"), true);
+    const SGPropertyNode * min_node = arg->getChild("min");
+    const SGPropertyNode * max_node = arg->getChild("max");
+
+    bool wrap = arg->getBoolValue("wrap");
+
+    if (min_node == 0 || max_node == 0)
+        wrap = false;
+  
+    if (wrap) {                 // wrap such that min <= x < max
+        double min_val = min_node->getDoubleValue();
+        double max_val = max_node->getDoubleValue();
+        double resolution = arg->getDoubleValue("resolution");
+        if (resolution > 0.0) {
+            // snap to (min + N*resolution), taking special care to handle imprecision
+            int n = (int)floor((*value - min_val) / resolution + 0.5);
+            int steps = (int)floor((max_val - min_val) / resolution + 0.5);
+            SG_NORMALIZE_RANGE(n, 0, steps);
+            *value = min_val + resolution * n;
+        } else {
+            // plain circular wrapping
+            SG_NORMALIZE_RANGE(*value, min_val, max_val);
+        }
+    } else {                    // clamp such that min <= x <= max
+        if ((min_node != 0) && (*value < min_node->getDoubleValue()))
+            *value = min_node->getDoubleValue();
+        else if ((max_node != 0) && (*value > max_node->getDoubleValue()))
+            *value = max_node->getDoubleValue();
+    }
 }
 
-static inline SGPropertyNode *
-get_prop2 (const SGPropertyNode * arg)
+static bool
+compare_values (SGPropertyNode * value1, SGPropertyNode * value2)
 {
-    return fgGetNode(arg->getStringValue("property[1]", "/null"), true);
+    switch (value1->getType()) {
+    case SGPropertyNode::BOOL:
+        return (value1->getBoolValue() == value2->getBoolValue());
+    case SGPropertyNode::INT:
+        return (value1->getIntValue() == value2->getIntValue());
+    case SGPropertyNode::LONG:
+        return (value1->getLongValue() == value2->getLongValue());
+    case SGPropertyNode::FLOAT:
+        return (value1->getFloatValue() == value2->getFloatValue());
+    case SGPropertyNode::DOUBLE:
+        return (value1->getDoubleValue() == value2->getDoubleValue());
+    default:
+        return !strcmp(value1->getStringValue(), value2->getStringValue());
+    }
 }
 
 
@@ -87,40 +164,182 @@ do_null (const SGPropertyNode * arg)
   return true;
 }
 
+/**
+ * Built-in command: run a Nasal script.
+ */
+static bool
+do_nasal (const SGPropertyNode * arg)
+{
+    return ((FGNasalSys*)globals->get_subsystem("nasal"))->handleCommand(arg);
+}
 
 /**
  * Built-in command: exit FlightGear.
  *
- * TODO: show a confirm dialog.
+ * status: the exit status to return to the operating system (defaults to 0)
  */
 static bool
 do_exit (const SGPropertyNode * arg)
 {
-  SG_LOG(SG_INPUT, SG_ALERT, "Program exit requested.");
-  ConfirmExitDialog();
-  return true;
+    SG_LOG(SG_INPUT, SG_INFO, "Program exit requested.");
+    fgSetBool("/sim/signals/exit", true);
+
+    if (fgGetBool("/sim/startup/save-on-exit")) {
+#ifdef _MSC_VER
+        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
+            config.append( "autosave.xml" );
+            config.create_dir( 0700 );
+            SG_LOG(SG_IO, SG_INFO, "Saving user settings to " << config.str());
+            try {
+                writeProperties(config.str(), globals->get_props(), false, SGPropertyNode::USERARCHIVE);
+            } catch (const sg_exception &e) {
+                guiErrorMessage("Error writing autosave.xml: ", e);
+            }
+
+            SG_LOG(SG_INPUT, SG_DEBUG, "Finished Saving user settings");
+        }
+    }
+    fgExit(arg->getIntValue("status", 0));
+    return true;
+}
+
+
+/**
+ * Reset FlightGear (Shift-Escape or Menu->File->Reset)
+ */
+static bool
+do_reset (const SGPropertyNode * arg)
+{
+    reInit();
+    return true;
+}
+
+
+/**
+ * Built-in command: reinitialize one or more subsystems.
+ *
+ * subsystem[*]: the name(s) of the subsystem(s) to reinitialize; if
+ * none is specified, reinitialize all of them.
+ */
+static bool
+do_reinit (const SGPropertyNode * arg)
+{
+    bool result = true;
+
+    vector<SGPropertyNode_ptr> subsystems = arg->getChildren("subsystem");
+    if (subsystems.size() == 0) {
+        globals->get_subsystem_mgr()->reinit();
+    } else {
+        for ( unsigned int i = 0; i < subsystems.size(); i++ ) {
+            const char * name = subsystems[i]->getStringValue();
+            SGSubsystem * subsystem = globals->get_subsystem(name);
+            if (subsystem == 0) {
+                result = false;
+                SG_LOG( SG_GENERAL, SG_ALERT,
+                        "Subsystem " << name << "not found" );
+            } else {
+                subsystem->reinit();
+            }
+        }
+    }
+
+    globals->get_event_mgr()->reinit();
+
+    return result;
 }
 
+#if 0
+  //
+  // these routines look useful ??? but are never used in the code ???
+  //
+
+/**
+ * Built-in command: suspend one or more subsystems.
+ *
+ * subsystem[*] - the name(s) of the subsystem(s) to suspend.
+ */
+static bool
+do_suspend (const SGPropertyNode * arg)
+{
+    bool result = true;
+
+    vector<SGPropertyNode_ptr> subsystems = arg->getChildren("subsystem");
+    for ( unsigned int i = 0; i < subsystems.size(); i++ ) {
+        const char * name = subsystems[i]->getStringValue();
+        SGSubsystem * subsystem = globals->get_subsystem(name);
+        if (subsystem == 0) {
+            result = false;
+            SG_LOG(SG_GENERAL, SG_ALERT, "Subsystem " << name << "not found");
+        } else {
+            subsystem->suspend();
+        }
+    }
+    return result;
+}
+
+/**
+ * Built-in command: suspend one or more subsystems.
+ *
+ * subsystem[*] - the name(s) of the subsystem(s) to suspend.
+ */
+static bool
+do_resume (const SGPropertyNode * arg)
+{
+    bool result = true;
+
+    vector<SGPropertyNode_ptr> subsystems = arg->getChildren("subsystem");
+    for ( unsigned int i = 0; i < subsystems.size(); i++ ) {
+        const char * name = subsystems[i]->getStringValue();
+        SGSubsystem * subsystem = globals->get_subsystem(name);
+        if (subsystem == 0) {
+            result = false;
+            SG_LOG(SG_GENERAL, SG_ALERT, "Subsystem " << name << "not found");
+        } else {
+            subsystem->resume();
+        }
+    }
+    return result;
+}
+
+#endif
+
 
 /**
  * Built-in command: load flight.
  *
  * file (optional): the name of the file to load (relative to current
- * directory).  Defaults to "fgfs.sav".
+ *   directory).  Defaults to "fgfs.sav"
  */
 static bool
 do_load (const SGPropertyNode * arg)
 {
-  const string &file = arg->getStringValue("file", "fgfs.sav");
-  ifstream input(file.c_str());
-  if (input.good() && fgLoadFlight(input)) {
-    input.close();
-    SG_LOG(SG_INPUT, SG_INFO, "Restored flight from " << file);
-    return true;
-  } else {
-    SG_LOG(SG_INPUT, SG_ALERT, "Cannot load flight from " << file);
-    return false;
-  }
+    string file = arg->getStringValue("file", "fgfs.sav");
+    if (file.size() < 4 || file.substr(file.size() - 4) != ".sav")
+        file += ".sav";
+
+    if (!fgValidatePath(file.c_str(), false)) {
+        SG_LOG(SG_IO, SG_ALERT, "load: reading '" << file << "' denied "
+                "(unauthorized access)");
+        return false;
+    }
+
+    ifstream input(file.c_str());
+    if (input.good() && fgLoadFlight(input)) {
+        input.close();
+        SG_LOG(SG_INPUT, SG_INFO, "Restored flight from " << file);
+        return true;
+    } else {
+        SG_LOG(SG_INPUT, SG_WARN, "Cannot load flight from " << file);
+        return false;
+    }
 }
 
 
@@ -133,18 +352,27 @@ do_load (const SGPropertyNode * arg)
 static bool
 do_save (const SGPropertyNode * arg)
 {
-  const string &file = arg->getStringValue("file", "fgfs.sav");
-  bool write_all = arg->getBoolValue("write-all", false);
-  SG_LOG(SG_INPUT, SG_INFO, "Saving flight");
-  ofstream output(file.c_str());
-  if (output.good() && fgSaveFlight(output, write_all)) {
-    output.close();
-    SG_LOG(SG_INPUT, SG_INFO, "Saved flight to " << file);
-    return true;
-  } else {
-    SG_LOG(SG_INPUT, SG_ALERT, "Cannot save flight to " << file);
-    return false;
-  }
+    string file = arg->getStringValue("file", "fgfs.sav");
+    if (file.size() < 4 || file.substr(file.size() - 4) != ".sav")
+        file += ".sav";
+
+    if (!fgValidatePath(file.c_str(), false)) {
+        SG_LOG(SG_IO, SG_ALERT, "save: reading '" << file << "' denied "
+                "(unauthorized access)");
+        return false;
+    }
+
+    bool write_all = arg->getBoolValue("write-all", false);
+    SG_LOG(SG_INPUT, SG_INFO, "Saving flight");
+    ofstream output(file.c_str());
+    if (output.good() && fgSaveFlight(output, write_all)) {
+        output.close();
+        SG_LOG(SG_INPUT, SG_INFO, "Saved flight to " << file);
+        return true;
+    } else {
+        SG_LOG(SG_INPUT, SG_ALERT, "Cannot save flight to " << file);
+        return false;
+    }
 }
 
 
@@ -169,10 +397,10 @@ do_panel_load (const SGPropertyNode * arg)
     return false;
   }
   SG_LOG(SG_INPUT, SG_INFO, "Loaded new panel from " << panel_path);
-  current_panel->unbind();
-  delete current_panel;
-  current_panel = new_panel;
-  current_panel->bind();
+  globals->get_current_panel()->unbind();
+  delete globals->get_current_panel();
+  globals->set_current_panel( new_panel );
+  globals->get_current_panel()->bind();
   return true;
 }
 
@@ -188,8 +416,8 @@ do_panel_load (const SGPropertyNode * arg)
 static bool
 do_panel_mouse_click (const SGPropertyNode * arg)
 {
-  if (current_panel != 0)
-    return current_panel
+  if (globals->get_current_panel() != 0)
+    return globals->get_current_panel()
       ->doMouseAction(arg->getIntValue("button"),
 		      arg->getBoolValue("is-down") ? PU_DOWN : PU_UP,
 		      arg->getIntValue("x-pos"),
@@ -231,22 +459,20 @@ fix_hud_visibility()
   }
 }
 
-void
+static void
 do_view_next( bool )
 {
     globals->get_current_view()->setHeadingOffset_deg(0.0);
     globals->get_viewmgr()->next_view();
     fix_hud_visibility();
-    globals->get_tile_mgr()->refresh_view_timestamps();
 }
 
-void
+static void
 do_view_prev( bool )
 {
     globals->get_current_view()->setHeadingOffset_deg(0.0);
     globals->get_viewmgr()->prev_view();
     fix_hud_visibility();
-    globals->get_tile_mgr()->refresh_view_timestamps();
 }
 
 /**
@@ -258,8 +484,6 @@ do_view_cycle (const SGPropertyNode * arg)
   globals->get_current_view()->setHeadingOffset_deg(0.0);
   globals->get_viewmgr()->next_view();
   fix_hud_visibility();
-  globals->get_tile_mgr()->refresh_view_timestamps();
-//   fgReshape(fgGetInt("/sim/startup/xsize"), fgGetInt("/sim/startup/ysize"));
   return true;
 }
 
@@ -269,7 +493,40 @@ do_view_cycle (const SGPropertyNode * arg)
 static bool
 do_screen_capture (const SGPropertyNode * arg)
 {
-  fgDumpSnapShot();
+  return fgDumpSnapShot();
+}
+
+static bool
+do_dump_scene_graph (const SGPropertyNode*)
+{
+    fgDumpSceneGraph();
+    return true;
+}
+
+static bool
+do_dump_terrain_branch (const SGPropertyNode*)
+{
+    fgDumpTerrainBranch();
+
+    double lon_deg = fgGetDouble("/position/longitude-deg");
+    double lat_deg = fgGetDouble("/position/latitude-deg");
+    SGGeod geodPos = SGGeod::fromDegFt(lon_deg, lat_deg, 0.0);
+    SGVec3d zero = SGVec3d::fromGeod(geodPos);
+
+    SG_LOG(SG_INPUT, SG_INFO, "Model parameters:");
+    SG_LOG(SG_INPUT, SG_INFO, "Center: " << zero.x() << ", " << zero.y() << ", " << zero.z() );
+    SG_LOG(SG_INPUT, SG_INFO, "Rotation: " << lat_deg << ", " << lon_deg );
+
+    return true;
+}
+
+/**
+ * Built-in command: hires capture screen.
+ */
+static bool
+do_hires_screen_capture (const SGPropertyNode * arg)
+{
+  fgHiResDump();
   return true;
 }
 
@@ -287,7 +544,6 @@ do_tile_cache_reload (const SGPropertyNode * arg)
     if ( !freeze ) {
 	fgSetBool("/sim/freeze/master", true);
     }
-    // BusyCursor(0);
     if ( globals->get_tile_mgr()->init() ) {
 	// Load the local scenery data
         double visibility_meters = fgGetDouble("/environment/visibility-m");
@@ -297,7 +553,6 @@ do_tile_cache_reload (const SGPropertyNode * arg)
 		"Error in Tile Manager initialization!" );
 	exit(-1);
     }
-    // BusyCursor(1);
     if ( !freeze ) {
 	fgSetBool("/sim/freeze/master", false);
     }
@@ -305,14 +560,269 @@ do_tile_cache_reload (const SGPropertyNode * arg)
 }
 
 
+/**
+ * Set the sea level outside air temperature and assigning that to all
+ * boundary and aloft environment layers.
+ */
+static bool
+do_set_sea_level_degc (const SGPropertyNode * arg)
+{
+    double temp_sea_level_degc = arg->getDoubleValue("temp-degc", 15.0);
+
+    SGPropertyNode *node, *child;
+
+    // boundary layers
+    node = fgGetNode( "/environment/config/boundary" );
+    if ( node != NULL ) {
+      int i = 0;
+      while ( ( child = node->getNode( "entry", i ) ) != NULL ) {
+	child->setDoubleValue( "temperature-sea-level-degc",
+			       temp_sea_level_degc );
+	++i;
+      }
+    }
+
+    // aloft layers
+    node = fgGetNode( "/environment/config/aloft" );
+    if ( node != NULL ) {
+      int i = 0;
+      while ( ( child = node->getNode( "entry", i ) ) != NULL ) {
+	child->setDoubleValue( "temperature-sea-level-degc",
+			       temp_sea_level_degc );
+	++i;
+      }
+    }
+
+    return true;
+}
+
+
+/**
+ * Set the outside air temperature at the "current" altitude by first
+ * calculating the corresponding sea level temp, and assigning that to
+ * all boundary and aloft environment layers.
+ */
+static bool
+do_set_oat_degc (const SGPropertyNode * arg)
+{
+    const string &temp_str = arg->getStringValue("temp-degc", "15.0");
+
+    // check for an altitude specified in the arguments, otherwise use
+    // current aircraft altitude.
+    const SGPropertyNode *altitude_ft = arg->getChild("altitude-ft");
+    if ( altitude_ft == NULL ) {
+        altitude_ft = fgGetNode("/position/altitude-ft");
+    }
+
+    FGEnvironment dummy;	// instantiate a dummy so we can leech a method
+    dummy.set_elevation_ft( altitude_ft->getDoubleValue() );
+    dummy.set_temperature_degc( atof( temp_str.c_str() ) );
+    double temp_sea_level_degc = dummy.get_temperature_sea_level_degc();
+
+    //cout << "Altitude = " << altitude_ft->getDoubleValue() << endl;
+    //cout << "Temp at alt (C) = " << atof( temp_str.c_str() ) << endl;
+    //cout << "Temp sea level (C) = " << temp_sea_level_degc << endl;
+ 
+    SGPropertyNode *node, *child;
+
+    // boundary layers
+    node = fgGetNode( "/environment/config/boundary" );
+    if ( node != NULL ) {
+      int i = 0;
+      while ( ( child = node->getNode( "entry", i ) ) != NULL ) {
+	child->setDoubleValue( "temperature-sea-level-degc",
+			       temp_sea_level_degc );
+	++i;
+      }
+    }
+
+    // aloft layers
+    node = fgGetNode( "/environment/config/aloft" );
+    if ( node != NULL ) {
+      int i = 0;
+      while ( ( child = node->getNode( "entry", i ) ) != NULL ) {
+	child->setDoubleValue( "temperature-sea-level-degc",
+			       temp_sea_level_degc );
+	++i;
+      }
+    }
+
+    return true;
+}
+
+/**
+ * Set the sea level outside air dewpoint and assigning that to all
+ * boundary and aloft environment layers.
+ */
+static bool
+do_set_dewpoint_sea_level_degc (const SGPropertyNode * arg)
+{
+    double dewpoint_sea_level_degc = arg->getDoubleValue("dewpoint-degc", 5.0);
+
+    SGPropertyNode *node, *child;
+
+    // boundary layers
+    node = fgGetNode( "/environment/config/boundary" );
+    if ( node != NULL ) {
+      int i = 0;
+      while ( ( child = node->getNode( "entry", i ) ) != NULL ) {
+	child->setDoubleValue( "dewpoint-sea-level-degc",
+			       dewpoint_sea_level_degc );
+	++i;
+      }
+    }
+
+    // aloft layers
+    node = fgGetNode( "/environment/config/aloft" );
+    if ( node != NULL ) {
+      int i = 0;
+      while ( ( child = node->getNode( "entry", i ) ) != NULL ) {
+	child->setDoubleValue( "dewpoint-sea-level-degc",
+			       dewpoint_sea_level_degc );
+	++i;
+      }
+    }
+
+    return true;
+}
+
+
+/**
+ * Set the outside air dewpoint at the "current" altitude by first
+ * calculating the corresponding sea level dewpoint, and assigning
+ * that to all boundary and aloft environment layers.
+ */
+static bool
+do_set_dewpoint_degc (const SGPropertyNode * arg)
+{
+    const string &dewpoint_str = arg->getStringValue("dewpoint-degc", "5.0");
+
+    // check for an altitude specified in the arguments, otherwise use
+    // current aircraft altitude.
+    const SGPropertyNode *altitude_ft = arg->getChild("altitude-ft");
+    if ( altitude_ft == NULL ) {
+        altitude_ft = fgGetNode("/position/altitude-ft");
+    }
+
+    FGEnvironment dummy;	// instantiate a dummy so we can leech a method
+    dummy.set_elevation_ft( altitude_ft->getDoubleValue() );
+    dummy.set_dewpoint_degc( atof( dewpoint_str.c_str() ) );
+    double dewpoint_sea_level_degc = dummy.get_dewpoint_sea_level_degc();
+
+    //cout << "Altitude = " << altitude_ft->getDoubleValue() << endl;
+    //cout << "Dewpoint at alt (C) = " << atof( dewpoint_str.c_str() ) << endl;
+    //cout << "Dewpoint at sea level (C) = " << dewpoint_sea_level_degc << endl;
+ 
+    SGPropertyNode *node, *child;
+
+    // boundary layers
+    node = fgGetNode( "/environment/config/boundary" );
+    if ( node != NULL ) {
+      int i = 0;
+      while ( ( child = node->getNode( "entry", i ) ) != NULL ) {
+	child->setDoubleValue( "dewpoint-sea-level-degc",
+			       dewpoint_sea_level_degc );
+	++i;
+      }
+    }
+
+    // aloft layers
+    node = fgGetNode( "/environment/config/aloft" );
+    if ( node != NULL ) {
+      int i = 0;
+      while ( ( child = node->getNode( "entry", i ) ) != NULL ) {
+	child->setDoubleValue( "dewpoint-sea-level-degc",
+			       dewpoint_sea_level_degc );
+	++i;
+      }
+    }
+
+    return true;
+}
+
 /**
  * Update the lighting manually.
  */
 static bool
-do_lighting_update (const SGPropertyNode * arg)
+do_timeofday (const SGPropertyNode * arg)
 {
-  fgUpdateSkyAndLightingParams();
-  return true;
+    const string &offset_type = arg->getStringValue("timeofday", "noon");
+
+    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);
+
+    int orig_warp = globals->get_warp();
+    SGTime *t = globals->get_time_params();
+    time_t cur_time = t->get_cur_time();
+    // cout << "cur_time = " << cur_time << endl;
+    // cout << "orig_warp = " << orig_warp << endl;
+
+    int warp = 0;
+    if ( offset_type == "real" ) {
+        warp = -orig_warp;
+    } 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 ); 
+    }
+    // cout << "warp = " << warp << endl;
+    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() );
+
+    return true;
 }
 
 
@@ -333,50 +843,41 @@ do_property_toggle (const SGPropertyNode * arg)
  * Built-in command: assign a value to a property.
  *
  * property: the name of the property to assign.
- * value: the value to assign.
+ * value: the value to assign; or
+ * property[1]: the property to copy from.
  */
 static bool
 do_property_assign (const SGPropertyNode * arg)
 {
   SGPropertyNode * prop = get_prop(arg);
+  const SGPropertyNode * prop2 = get_prop2(arg);
   const SGPropertyNode * value = arg->getNode("value");
 
-  switch (prop->getType()) {
-
-  case SGPropertyNode::BOOL:
-    return prop->setBoolValue(value->getBoolValue());
-
-  case SGPropertyNode::INT:
-    return prop->setIntValue(value->getIntValue());
-
-  case SGPropertyNode::LONG:
-    return prop->setLongValue(value->getLongValue());
-
-  case SGPropertyNode::FLOAT:
-    return prop->setFloatValue(value->getFloatValue());
-
-  case SGPropertyNode::DOUBLE:
-    return prop->setDoubleValue(value->getDoubleValue());
-
-  case SGPropertyNode::STRING:
-    return prop->setStringValue(value->getStringValue());
-
-  default:
-    return prop->setUnspecifiedValue(value->getStringValue());
-
-  }
+  if (value != 0)
+      return prop->setUnspecifiedValue(value->getStringValue());
+  else if (prop2)
+      return prop->setUnspecifiedValue(prop2->getStringValue());
+  else
+      return false;
 }
 
 
 /**
  * Built-in command: increment or decrement a property value.
  *
+ * If the 'step' argument is present, it will be used; otherwise,
+ * the command uses 'offset' and 'factor', usually from the mouse.
+ *
  * property: the name of the property to increment or decrement.
  * step: the amount of the increment or decrement (default: 0).
- * offset: a normalized amount to offset by (if step is not present).
- * factor: the amount by which to multiply the offset (if step is not present).
+ * offset: offset from the current setting (used for the mouse; multiplied 
+ *         by factor)
+ * factor: scaling amount for the offset (defaults to 1).
  * min: the minimum allowed value (default: no minimum).
  * max: the maximum allowed value (default: no maximum).
+ * mask: 'integer' to apply only to the left of the decimal point, 
+ *       'decimal' to apply only to the right of the decimal point,
+ *       or 'all' to apply to the whole number (the default).
  * wrap: true if the value should be wrapped when it passes min or max;
  *       both min and max must be present for this to work (default:
  *       false).
@@ -385,113 +886,23 @@ static bool
 do_property_adjust (const SGPropertyNode * arg)
 {
   SGPropertyNode * prop = get_prop(arg);
-  const SGPropertyNode * step = arg->getChild("step");
-  const SGPropertyNode * offset = arg->getChild("offset");
-  const SGPropertyNode * factor = arg->getChild("factor");
-  const SGPropertyNode * min = arg->getChild("min");
-  const SGPropertyNode * max = arg->getChild("max");
-  bool wrap = arg->getBoolValue("wrap");
-
-  if (min == 0 || max == 0)
-      wrap = false;
 
   double amount = 0;
-  if (step == 0)
-    amount = offset->getDoubleValue() * factor->getDoubleValue();
-
-  switch (prop->getType()) {
-
-  case SGPropertyNode::BOOL: {
-    bool value;
-    if (step != 0)
-      value = step->getBoolValue();
-    else
-      value = (0.0 != amount);
-    if (value)
-      return prop->setBoolValue(!prop->getBoolValue());
-    else
-      return true;
-  }
-
-  case SGPropertyNode::INT: {
-    int value;
-    if (step != 0)
-      value = prop->getIntValue() + step->getIntValue();
-    else
-      value = prop->getIntValue() + int(amount);
-    if (wrap) {
-        do_wrap(&value, min->getIntValue(), max->getIntValue());
-    } else {
-        if (min != 0 && value < min->getIntValue())
-            value = min->getIntValue();
-        if (max != 0 && value > max->getIntValue())
-            value = max->getIntValue();
-    }
-    return prop->setIntValue(value);
-  }
-
-  case SGPropertyNode::LONG: {
-    long value;
-    if (step != 0)
-      value = prop->getLongValue() + step->getLongValue();
-    else
-      value = prop->getLongValue() + long(amount);
-    if (wrap) {
-        do_wrap(&value, min->getLongValue(), max->getLongValue());
-    } else {
-        if (min != 0 && value < min->getLongValue())
-            value = min->getLongValue();
-        if (max != 0 && value > max->getLongValue())
-            value = max->getLongValue();
-    }
-    return prop->setLongValue(value);
-  }
-
-  case SGPropertyNode::FLOAT: {
-    float value;
-    if (step != 0)
-      value = prop->getFloatValue() + step->getFloatValue();
-    else
-      value = prop->getFloatValue() + float(amount);
-    if (wrap) {
-        do_wrap(&value, min->getFloatValue(), max->getFloatValue());
-    } else {
-        if (min != 0 && value < min->getFloatValue())
-            value = min->getFloatValue();
-        if (max != 0 && value > max->getFloatValue())
-            value = max->getFloatValue();
-    }
-    return prop->setFloatValue(value);
-  }
-
-  case SGPropertyNode::DOUBLE:
-  case SGPropertyNode::UNSPECIFIED:
-  case SGPropertyNode::NONE: {
-    double value;
-    if (step != 0)
-      value = prop->getDoubleValue() + step->getDoubleValue();
-    else
-      value = prop->getDoubleValue() + amount;
-    if (wrap) {
-        do_wrap(&value, min->getDoubleValue(), max->getDoubleValue());
-    } else {
-        if (min != 0 && value < min->getDoubleValue())
-            value = min->getDoubleValue();
-        if (max != 0 && value > max->getDoubleValue())
-            value = max->getDoubleValue();
-    }
-    return prop->setDoubleValue(value);
-  }
+  if (arg->hasValue("step"))
+      amount = arg->getDoubleValue("step");
+  else
+      amount = (arg->getDoubleValue("factor", 1)
+                * arg->getDoubleValue("offset"));
+          
+  double unmodifiable, modifiable;
+  split_value(prop->getDoubleValue(), arg->getStringValue("mask", "all"),
+              &unmodifiable, &modifiable);
+  modifiable += amount;
+  limit_value(&modifiable, arg);
 
-  case SGPropertyNode::STRING: // doesn't make sense with strings
-    SG_LOG(SG_INPUT, SG_ALERT, "Cannot adjust a string value");
-    return false;
+  prop->setDoubleValue(unmodifiable + modifiable);
 
-  default:
-    SG_LOG(SG_INPUT, SG_ALERT, "Unknown value type");
-    return false;
-
-  }
+  return true;
 }
 
 
@@ -500,42 +911,30 @@ do_property_adjust (const SGPropertyNode * arg)
  *
  * property: the name of the property to multiply.
  * factor: the amount by which to multiply.
+ * min: the minimum allowed value (default: no minimum).
+ * max: the maximum allowed value (default: no maximum).
+ * mask: 'integer' to apply only to the left of the decimal point, 
+ *       'decimal' to apply only to the right of the decimal point,
+ *       or 'all' to apply to the whole number (the default).
+ * wrap: true if the value should be wrapped when it passes min or max;
+ *       both min and max must be present for this to work (default:
+ *       false).
  */
 static bool
 do_property_multiply (const SGPropertyNode * arg)
 {
   SGPropertyNode * prop = get_prop(arg);
-  const SGPropertyNode * factor = arg->getChild("factor");
-
-  if (factor == 0)
-      return true;
-
-  switch (prop->getType()) {
-
-  case SGPropertyNode::BOOL:
-    return prop->setBoolValue(prop->getBoolValue() && factor->getBoolValue());
-
-  case SGPropertyNode::INT:
-    return prop->setIntValue(int(prop->getIntValue()
-                                 * factor->getDoubleValue()));
-
-  case SGPropertyNode::LONG:
-    return prop->setLongValue(long(prop->getLongValue()
-				   * factor->getDoubleValue()));
+  double factor = arg->getDoubleValue("factor", 1);
 
-  case SGPropertyNode::FLOAT:
-    return prop->setFloatValue(float(prop->getFloatValue()
-				     * factor->getDoubleValue()));
+  double unmodifiable, modifiable;
+  split_value(prop->getDoubleValue(), arg->getStringValue("mask", "all"),
+              &unmodifiable, &modifiable);
+  modifiable *= factor;
+  limit_value(&modifiable, arg);
 
-  case SGPropertyNode::DOUBLE:
-  case SGPropertyNode::UNSPECIFIED:
-  case SGPropertyNode::NONE:
-    return prop->setDoubleValue(prop->getDoubleValue()
-				* factor->getDoubleValue());
+  prop->setDoubleValue(unmodifiable + modifiable);
 
-  default:			// doesn't make sense with strings
-    return false;
-  }
+  return true;
 }
 
 
@@ -574,14 +973,125 @@ do_property_scale (const SGPropertyNode * arg)
   double offset = arg->getDoubleValue("offset", 0.0);
   double factor = arg->getDoubleValue("factor", 1.0);
   bool squared = arg->getBoolValue("squared", false);
-
-  if (squared)
-    setting = (setting < 0 ? -1 : 1) * setting * setting;
+  int power = arg->getIntValue("power", (squared ? 2 : 1));
+
+  int sign = (setting < 0 ? -1 : 1);
+
+  switch (power) {
+  case 1:
+      break;
+  case 2:
+      setting = setting * setting * sign;
+      break;
+  case 3:
+      setting = setting * setting * setting;
+      break;
+  case 4:
+      setting = setting * setting * setting * setting * sign;
+      break;
+  default:
+      setting =  pow(setting, power);
+      if ((power % 2) == 0)
+          setting *= sign;
+      break;
+  }
 
   return prop->setDoubleValue((setting + offset) * factor);
 }
 
 
+/**
+ * Built-in command: cycle a property through a set of values.
+ *
+ * If the current value isn't in the list, the cycle will
+ * (re)start from the beginning.
+ *
+ * property: the name of the property to cycle.
+ * value[*]: the list of values to cycle through.
+ */
+static bool
+do_property_cycle (const SGPropertyNode * arg)
+{
+    SGPropertyNode * prop = get_prop(arg);
+    vector<SGPropertyNode_ptr> values = arg->getChildren("value");
+    int selection = -1;
+    int nSelections = values.size();
+
+    if (nSelections < 1) {
+        SG_LOG(SG_GENERAL, SG_ALERT, "No values for property-cycle");
+        return false;
+    }
+
+                                // Try to find the current selection
+    for (int i = 0; i < nSelections; i++) {
+        if (compare_values(prop, values[i])) {
+            selection = i + 1;
+            break;
+        }
+    }
+
+                                // Default or wrap to the first selection
+    if (selection < 0 || selection >= nSelections)
+        selection = 0;
+
+    prop->setUnspecifiedValue(values[selection]->getStringValue());
+    return true;
+}
+
+
+/**
+ * Built-in command: randomize a numeric property value.
+ *
+ * property: the name of the property value to randomize.
+ * min: the minimum allowed value.
+ * max: the maximum allowed value.
+ */
+static bool
+do_property_randomize (const SGPropertyNode * arg)
+{
+    SGPropertyNode * prop = get_prop(arg);
+    double min = arg->getDoubleValue("min", DBL_MIN);
+    double max = arg->getDoubleValue("max", DBL_MAX);
+    prop->setDoubleValue(sg_random() * (max - min) + min);
+    return true;
+}
+
+
+/**
+ * Built-in command: reinit the data logging system based on the
+ * current contents of the /logger tree.
+ */
+static bool
+do_data_logging_commit (const SGPropertyNode * arg)
+{
+    FGLogger *log = (FGLogger *)globals->get_subsystem("logger");
+    log->reinit();
+    return true;
+}
+
+/**
+ * Built-in command: Add a dialog to the GUI system.  Does *not*
+ * display the dialog.  The property node should have the same format
+ * as a dialog XML configuration.  It must include:
+ *
+ * name: the name of the GUI dialog for future reference.
+ */
+static bool
+do_dialog_new (const SGPropertyNode * arg)
+{
+    NewGUI * gui = (NewGUI *)globals->get_subsystem("gui");
+
+    // Note the casting away of const: this is *real*.  Doing a
+    // "dialog-apply" command later on will mutate this property node.
+    // I'm not convinced that this isn't the Right Thing though; it
+    // allows client to create a node, pass it to dialog-new, and get
+    // the values back from the dialog by reading the same node.
+    // Perhaps command arguments are not as "const" as they would
+    // seem?
+    gui->newDialog((SGPropertyNode*)arg);
+    return true;
+}
+
 /**
  * Built-in command: Show an XML-configured dialog.
  *
@@ -590,29 +1100,22 @@ do_property_scale (const SGPropertyNode * arg)
 static bool
 do_dialog_show (const SGPropertyNode * arg)
 {
-    NewGUI * gui = (NewGUI *)globals->get_subsystem_mgr()
-        ->get_group(FGSubsystemMgr::INIT)->get_subsystem("gui");
-    gui->display(arg->getStringValue("dialog-name"));
+    NewGUI * gui = (NewGUI *)globals->get_subsystem("gui");
+    gui->showDialog(arg->getStringValue("dialog-name"));
     return true;
 }
 
 
 /**
- * Hide the active XML-configured dialog.
+ * Built-in Command: Hide the active XML-configured dialog.
  */
 static bool
 do_dialog_close (const SGPropertyNode * arg)
 {
-    NewGUI * gui = (NewGUI *)globals->get_subsystem_mgr()
-        ->get_group(FGSubsystemMgr::INIT)->get_subsystem("gui");
-    GUIWidget * widget = gui->getCurrentWidget();
-    if (widget != 0) {
-        delete widget;
-        gui->setCurrentWidget(0);
-        return true;
-    } else {
-        return false;
-    }
+    NewGUI * gui = (NewGUI *)globals->get_subsystem("gui");
+    if(arg->hasValue("dialog-name"))
+        return gui->closeDialog(arg->getStringValue("dialog-name"));
+    return gui->closeActiveDialog();
 }
 
 
@@ -624,16 +1127,15 @@ do_dialog_close (const SGPropertyNode * arg)
 static bool
 do_dialog_update (const SGPropertyNode * arg)
 {
-    NewGUI * gui = (NewGUI *)globals->get_subsystem_mgr()
-        ->get_group(FGSubsystemMgr::INIT)->get_subsystem("gui");
-    GUIWidget * widget = gui->getCurrentWidget();
-    if (widget != 0) {
-        if (arg->hasValue("object-name")) {
-            gui->getCurrentWidget()
-                ->updateValue(arg->getStringValue("object-name"));
-        } else {
-            gui->getCurrentWidget()->updateValues();
-        }
+    NewGUI * gui = (NewGUI *)globals->get_subsystem("gui");
+    FGDialog * dialog;
+    if (arg->hasValue("dialog-name"))
+        dialog = gui->getDialog(arg->getStringValue("dialog-name"));
+    else
+        dialog = gui->getActiveDialog();
+
+    if (dialog != 0) {
+        dialog->updateValues(arg->getStringValue("object-name"));
         return true;
     } else {
         return false;
@@ -649,16 +1151,15 @@ do_dialog_update (const SGPropertyNode * arg)
 static bool
 do_dialog_apply (const SGPropertyNode * arg)
 {
-    NewGUI * gui = (NewGUI *)globals->get_subsystem_mgr()
-        ->get_group(FGSubsystemMgr::INIT)->get_subsystem("gui");
-    GUIWidget * widget = gui->getCurrentWidget();
-    if (widget != 0) {
-        if (arg->hasValue("object-name")) {
-            gui->getCurrentWidget()
-                ->applyValue(arg->getStringValue("object-name"));
-        } else {
-            gui->getCurrentWidget()->applyValues();
-        }
+    NewGUI * gui = (NewGUI *)globals->get_subsystem("gui");
+    FGDialog * dialog;
+    if (arg->hasValue("dialog-name"))
+        dialog = gui->getDialog(arg->getStringValue("dialog-name"));
+    else
+        dialog = gui->getActiveDialog();
+
+    if (dialog != 0) {
+        dialog->applyValues(arg->getStringValue("object-name"));
         return true;
     } else {
         return false;
@@ -666,6 +1167,96 @@ do_dialog_apply (const SGPropertyNode * arg)
 }
 
 
+/**
+ * Redraw GUI (applying new widget colors). Doesn't reload the dialogs,
+ * unlike reinit().
+ */
+static bool
+do_gui_redraw (const SGPropertyNode * arg)
+{
+    NewGUI * gui = (NewGUI *)globals->get_subsystem("gui");
+    gui->redraw();
+    return true;
+}
+
+
+/**
+ * Adds model to the scenery. The path to the added branch (/models/model[*])
+ * is returned in property "property".
+ */
+static bool
+do_add_model (const SGPropertyNode * arg)
+{
+    SGPropertyNode * model = fgGetNode("models", true);
+    for (int i = 0;; i++) {
+        if (i < 0)
+            return false;
+        if (!model->getChild("model", i, false)) {
+            model = model->getChild("model", i, true);
+            break;
+        }
+    }
+    copyProperties(arg, model);
+    if (model->hasValue("elevation-m"))
+        model->setDoubleValue("elevation-ft", model->getDoubleValue("elevation-m")
+                * SG_METER_TO_FEET);
+    model->getNode("load", true);
+    model->removeChildren("load");
+    const_cast<SGPropertyNode *>(arg)->setStringValue("property", model->getPath());
+    return true;
+}
+
+
+/**
+ * Set mouse cursor coordinates and cursor shape.
+ */
+static bool
+do_set_cursor (const SGPropertyNode * arg)
+{
+    if (arg->hasValue("x") || arg->hasValue("y")) {
+        SGPropertyNode *mx = fgGetNode("/devices/status/mice/mouse/x", true);
+        SGPropertyNode *my = fgGetNode("/devices/status/mice/mouse/y", true);
+        int x = arg->getIntValue("x", mx->getIntValue());
+        int y = arg->getIntValue("y", my->getIntValue());
+        fgWarpMouse(x, y);
+        mx->setIntValue(x);
+        my->setIntValue(y);
+    }
+
+    SGPropertyNode *cursor = const_cast<SGPropertyNode *>(arg)->getNode("cursor", true);
+    if (cursor->getType() != SGPropertyNode::NONE)
+        fgSetMouseCursor(cursor->getIntValue());
+
+    cursor->setIntValue(fgGetMouseCursor());
+    return true;
+}
+
+
+/**
+ * Built-in command: play an audio message (i.e. a wav file) This is
+ * fire and forget.  Call this once per message and it will get dumped
+ * into a queue.  Messages are played sequentially so they do not
+ * overlap.
+ */
+static bool
+do_play_audio_sample (const SGPropertyNode * arg)
+{
+    FGFX *fx = (FGFX *)globals->get_subsystem("fx");
+    string path = arg->getStringValue("path");
+    string file = arg->getStringValue("file");
+    double volume = arg->getDoubleValue("volume");
+    // cout << "playing " << path << " / " << file << endl;
+    try {
+        fx->play_message( path, file, volume );
+        return true;
+
+    } catch (const sg_io_exception& e) {
+        SG_LOG(SG_GENERAL, SG_ALERT, "play-audio-sample: "
+                "failed to load" << path << '/' << file);
+        return false;
+    }
+}
+
 /**
  * Built-in command: commit presets (read from in /sim/presets/)
  */
@@ -676,25 +1267,235 @@ do_presets_commit (const SGPropertyNode * arg)
     // don't get lost when we subsequently delete this fdm
     // and create a new one.
     cur_fdm_state->unbind();
-        
+
     // set position from presets
     fgInitPosition();
 
-    // BusyCursor(0);
     fgReInitSubsystems();
 
     globals->get_tile_mgr()->update( fgGetDouble("/environment/visibility-m") );
 
+#if 0
     if ( ! fgGetBool("/sim/presets/onground") ) {
         fgSetBool( "/sim/freeze/master", true );
         fgSetBool( "/sim/freeze/clock", true );
     }
+#endif
 
     return true;
 }
 
+/**
+ * Built-in command: set log level (0 ... 7)
+ */
+static bool
+do_log_level (const SGPropertyNode * arg)
+{
+   sglog().setLogLevels( SG_ALL, (sgDebugPriority)arg->getIntValue() );
+
+   return true;
+}
+
+/**
+ * Built-in command: replay the FDR buffer
+ */
+static bool
+do_replay (const SGPropertyNode * arg)
+{
+    // freeze the master fdm
+    fgSetInt( "/sim/freeze/replay-state", 1 );
+
+    FGReplay *r = (FGReplay *)(globals->get_subsystem( "replay" ));
+
+    fgSetDouble( "/sim/replay/start-time", r->get_start_time() );
+    fgSetDouble( "/sim/replay/end-time", r->get_end_time() );
+    double duration = fgGetDouble( "/sim/replay/duration" );
+    if( duration && duration < (r->get_end_time() - r->get_start_time()) ) {
+        fgSetDouble( "/sim/replay/time", r->get_end_time() - duration );
+    } else {
+        fgSetDouble( "/sim/replay/time", r->get_start_time() );
+    }
+
+    // cout << "start = " << r->get_start_time()
+    //      << "  end = " << r->get_end_time() << endl;
+
+    return true;
+}
+
+
+static bool
+do_decrease_visibility (const SGPropertyNode * arg)
+{
+    double new_value = fgGetDouble("/environment/visibility-m") * 0.9;
+    fgSetDouble("/environment/visibility-m", new_value);
+    fgDefaultWeatherValue("visibility-m", new_value);
+    globals->get_subsystem("environment")->reinit();
+
+    return true;
+}
+ 
+static bool
+do_increase_visibility (const SGPropertyNode * arg)
+{
+    double new_value = fgGetDouble("/environment/visibility-m") * 1.1;
+    fgSetDouble("/environment/visibility-m", new_value);
+    fgDefaultWeatherValue("visibility-m", new_value);
+    globals->get_subsystem("environment")->reinit();
+
+    return true;
+}
+
+static bool
+do_hud_init(const SGPropertyNode *)
+{
+    fgHUDInit(0); // minimal HUD
+    return true;
+}
+
+static bool
+do_hud_init2(const SGPropertyNode *)
+{
+    fgHUDInit2(0);  // normal HUD
+    return true;
+}
+
+
+/**
+ * An fgcommand to allow loading of xml files via nasal,
+ * the xml file's structure will be made available within
+ * a property tree node defined under argument "targetnode",
+ * or in the given argument tree under "data" otherwise.
+ *
+ * @param filename a string to hold the complete path & filename of an XML file
+ * @param targetnode a string pointing to a location within the property tree
+ * where to store the parsed XML file. If <targetnode> is undefined, then the
+ * file contents are stored under a node <data> in the argument tree.
+ */
+
+static bool
+do_load_xml_to_proptree(const SGPropertyNode * arg)
+{
+    SGPath file(arg->getStringValue("filename"));
+    if (file.str().empty())
+        return false;
+
+    if (file.extension() != "xml")
+        file.concat(".xml");
+
+    if (!fgValidatePath(file.c_str(), false)) {
+        SG_LOG(SG_IO, SG_ALERT, "loadxml: reading '" << file.str() << "' denied "
+                "(unauthorized access)");
+        return false;
+    }
+
+    SGPropertyNode *targetnode;
+    if (arg->hasValue("targetnode"))
+        targetnode = fgGetNode(arg->getStringValue("targetnode"), true);
+    else
+        targetnode = const_cast<SGPropertyNode *>(arg)->getNode("data", true);
+
+    try {
+        readProperties(file.c_str(), targetnode, true);
+    } catch (const sg_exception &e) {
+        SG_LOG(SG_IO, SG_WARN, "loadxml: " << e.getFormattedMessage());
+        return false;
+    }
+
+    return true;
+}
+
+
+/**
+ * An fgcommand to allow saving of xml files via nasal,
+ * the file's structure will be determined based on what's
+ * encountered in the passed (source) property tree node
+ *
+ * @param filename a string to hold the complete path & filename of the (new)
+ * XML file
+ * @param sourcenode a string pointing to a location within the property tree
+ * where to find the nodes that should be written recursively into an XML file
+ * @param data if no sourcenode is given, then the file contents are taken from
+ * the argument tree's "data" node.
+ */
+
+static bool
+do_save_xml_from_proptree(const SGPropertyNode * arg)
+{
+    SGPath file(arg->getStringValue("filename"));
+    if (file.str().empty())
+        return false;
+
+    if (file.extension() != "xml")
+        file.concat(".xml");
+
+    if (!fgValidatePath(file.c_str(), true)) {
+        SG_LOG(SG_IO, SG_ALERT, "savexml: writing to '" << file.str() << "' denied "
+                "(unauthorized access)");
+        return false;
+    }
+
+    SGPropertyNode *sourcenode;
+    if (arg->hasValue("sourcenode"))
+        sourcenode = fgGetNode(arg->getStringValue("sourcenode"), true);
+    else if (arg->getNode("data", false))
+        sourcenode = const_cast<SGPropertyNode *>(arg)->getNode("data");
+    else
+        return false;
+
+    try {
+        writeProperties (file.c_str(), sourcenode, true);
+    } catch (const sg_exception &e) {
+        SG_LOG(SG_IO, SG_WARN, "savexml: " << e.getFormattedMessage());
+        return false;
+    }
+
+    return true;
+}
+
+static bool
+do_press_cockpit_button (const SGPropertyNode *arg)
+{
+  const char *prefix = arg->getStringValue("prefix");
+
+  if (arg->getBoolValue("guarded") && fgGetDouble((string(prefix) + "-guard").c_str()) < 1)
+    return true;
+
+  string prop = string(prefix) + "-button";
+  double value;
+
+  if (arg->getBoolValue("latching"))
+    value = fgGetDouble(prop.c_str()) > 0 ? 0 : 1;
+  else
+    value = 1;
+
+  fgSetDouble(prop.c_str(), value);
+  fgSetBool(arg->getStringValue("discrete"), value > 0);
+
+  return true;
+}
+
+static bool
+do_release_cockpit_button (const SGPropertyNode *arg)
+{
+  const char *prefix = arg->getStringValue("prefix");
+
+  if (arg->getBoolValue("guarded")) {
+    string prop = string(prefix) + "-guard";
+    if (fgGetDouble(prop.c_str()) < 1) {
+      fgSetDouble(prop.c_str(), 1);
+      return true;
+    }
+  }
+
+  if (! arg->getBoolValue("latching")) {
+    fgSetDouble((string(prefix) + "-button").c_str(), 0);
+    fgSetBool(arg->getStringValue("discrete"), false);
+  }
+
+  return true;
+}
+
 
-
 ////////////////////////////////////////////////////////////////////////
 // Command setup.
 ////////////////////////////////////////////////////////////////////////
@@ -711,7 +1512,12 @@ static struct {
   SGCommandMgr::command_t command;
 } built_ins [] = {
     { "null", do_null },
+    { "nasal", do_nasal },
     { "exit", do_exit },
+    { "reset", do_reset },
+    { "reinit", do_reinit },
+    { "suspend", do_reinit },
+    { "resume", do_reinit },
     { "load", do_load },
     { "save", do_save },
     { "panel-load", do_panel_load },
@@ -719,19 +1525,44 @@ static struct {
     { "preferences-load", do_preferences_load },
     { "view-cycle", do_view_cycle },
     { "screen-capture", do_screen_capture },
+    { "hires-screen-capture", do_hires_screen_capture },
     { "tile-cache-reload", do_tile_cache_reload },
-    { "lighting-update", do_lighting_update },
+    { "set-sea-level-air-temp-degc", do_set_sea_level_degc },
+    { "set-outside-air-temp-degc", do_set_oat_degc },
+    { "set-dewpoint-sea-level-air-temp-degc", do_set_dewpoint_sea_level_degc },
+    { "set-dewpoint-temp-degc", do_set_dewpoint_degc },
+    { "timeofday", do_timeofday },
     { "property-toggle", do_property_toggle },
     { "property-assign", do_property_assign },
     { "property-adjust", do_property_adjust },
     { "property-multiply", do_property_multiply },
     { "property-swap", do_property_swap },
     { "property-scale", do_property_scale },
+    { "property-cycle", do_property_cycle },
+    { "property-randomize", do_property_randomize },
+    { "data-logging-commit", do_data_logging_commit },
+    { "dialog-new", do_dialog_new },
     { "dialog-show", do_dialog_show },
     { "dialog-close", do_dialog_close },
-    { "dialog-show", do_dialog_show },
     { "dialog-update", do_dialog_update },
     { "dialog-apply", do_dialog_apply },
+    { "gui-redraw", do_gui_redraw },
+    { "add-model", do_add_model },
+    { "set-cursor", do_set_cursor },
+    { "play-audio-sample", do_play_audio_sample },
+    { "presets-commit", do_presets_commit },
+    { "log-level", do_log_level },
+    { "replay", do_replay },
+    { "decrease-visibility", do_decrease_visibility },
+    { "increase-visibility", do_increase_visibility },
+    { "hud-init", do_hud_init },
+    { "hud-init2", do_hud_init2 },
+    { "loadxml", do_load_xml_to_proptree},
+    { "savexml", do_save_xml_from_proptree },
+    { "press-cockpit-button", do_press_cockpit_button },
+    { "release-cockpit-button", do_release_cockpit_button },
+    { "dump-scenegraph", do_dump_scene_graph },
+    { "dump-terrainbranch", do_dump_terrain_branch },
     { 0, 0 }			// zero-terminated
 };