Modified FGSubsystem::update() to take an int parameter for delta time

(i.e. multiloop).  Most subsystems currently ignore the parameter, but
eventually, it will allow all subsystems to update by time rather than
by framerate.

src/Cockpit/panel.cxx

@@ -253,7 +253,7 @@ FGPanel::unbind ()
  * Update the panel.
  */
 void
-FGPanel::update ()
+FGPanel::update (int dt)
 {
 				// Do nothing if the panel isn't visible.
     if ( !fgPanelVisible() ) {

src/Cockpit/panel.hxx

@@ -141,7 +141,7 @@ public:
   virtual void init ();
   virtual void bind ();
   virtual void unbind ();
-  virtual void update ();
+  virtual void update (int dt);
   virtual void update (GLfloat winx, GLfloat winw, GLfloat winy, GLfloat winh);
 
 				// transfer pointer ownership!!!

src/Cockpit/radiostack.cxx

@@ -140,7 +140,7 @@ FGRadioStack::init ()
     blink.stamp();
 
     search();
-    update();
+    update(1);			// FIXME: use dt
 
     // Search radio database once per second
     global_events.Register( "fgRadioSearch()", fgRadioSearch,
@@ -400,7 +400,7 @@ double FGRadioStack::adjustILSRange( double stationElev, double aircraftElev,
 
 // Update the various nav values based on position and valid tuned in navs
 void 
-FGRadioStack::update() 
+FGRadioStack::update(int dt) 
 {
     //DCL
     string transmission;

src/Cockpit/radiostack.hxx

@@ -215,7 +215,7 @@ public:
     void init ();
     void bind ();
     void unbind ();
-    void update ();
+    void update (int dt);
 
     // Update nav/adf radios based on current postition
     void search ();

src/Controls/controls.cxx

@@ -176,7 +176,7 @@ FGControls::unbind ()
 
 
 void
-FGControls::update ()
+FGControls::update (int dt)
 {
 }
 

src/Controls/controls.hxx

@@ -92,7 +92,7 @@ public:
     void init ();
     void bind ();
     void unbind ();
-    void update ();
+    void update (int dt);
 
     // Reset function
     void reset_all(void);

src/FDM/ADA.cxx

@@ -198,7 +198,7 @@ void FGADA::init() {
 // Run an iteration of the EOM.  This is essentially a NOP here
 // because these values are getting filled in elsewhere based on
 // external input.
-bool FGADA::update( int multiloop ) {
+void FGADA::update( int multiloop ) {
     // cout << "FGADA::update()" << endl;
 
     char Buffer[numberofbytes];
@@ -223,8 +223,6 @@ bool FGADA::update( int multiloop ) {
          memcpy (&OutBuffer, &visuals_to_sixdof, sizeof (OutBuffer));
 		 int result = fdmsock->write(OutBuffer, nbytes);
 	}
-
-    return true;
 }
 
 // Convert from the FGInterface struct to the FGADA struct (output)

src/FDM/ADA.hxx

@@ -79,7 +79,7 @@ public:
     void init();
 
     // update position based on inputs, positions, velocities, etc.
-    bool update( int multiloop );
+    void update(int dt);
 
 };
 

src/FDM/Balloon.cxx

@@ -113,7 +113,7 @@ void FGBalloonSim::init() {
 
 
 // Run an iteration of the EOM (equations of motion)
-bool FGBalloonSim::update( int multiloop ) {
+void FGBalloonSim::update( int multiloop ) {
     double save_alt = 0.0;
 
     // lets try to avoid really screwing up the BalloonSim model
@@ -162,8 +162,6 @@ bool FGBalloonSim::update( int multiloop ) {
     if ( save_alt < -9000.0 ) {
 	set_Altitude( save_alt );
     }
-
-    return true;
 }
 
 

src/FDM/Balloon.h

@@ -75,7 +75,7 @@ public:
     void init();
 
     // update position based on inputs, positions, velocities, etc.
-    bool update( int multiloop );
+    void update( int multiloop );
 };
 
 

src/FDM/External.cxx

@@ -43,12 +43,9 @@ void FGExternal::init() {
 // Run an iteration of the EOM.  This is essentially a NOP here
 // because these values are getting filled in elsewhere based on
 // external input.
-bool FGExternal::update( int multiloop ) {
+void FGExternal::update( int multiloop ) {
     // cout << "FGExternal::update()" << endl;
 
     // double time_step = (1.0 / fgGetInt("/sim/model-hz"))
     //                     * multiloop;
-
-
-    return true;
 }

src/FDM/External.hxx

@@ -38,7 +38,7 @@ public:
     void init();
 
     // update position based on inputs, positions, velocities, etc.
-    bool update( int multiloop );
+    void update( int multiloop );
 };
 
 

src/FDM/ExternalNet.cxx

@@ -65,8 +65,6 @@ void FGExternalNet::init() {
 // Run an iteration of the EOM.  This is a NOP here because the flight
 // model values are getting filled in elsewhere (most likely from some
 // external source.)
-bool FGExternalNet::update( int multiloop ) {
+void FGExternalNet::update( int multiloop ) {
     // cout << "FGExternalNet::update()" << endl;
-
-    return true;
 }

src/FDM/ExternalNet.hxx

@@ -53,7 +53,7 @@ public:
     void init();
 
     // update the fdm
-    bool update( int multiloop );
+    void update( int multiloop );
 
 };
 

src/FDM/JSBSim.cxx

@@ -230,7 +230,8 @@ void FGJSBsim::init() {
 
 // Run an iteration of the EOM (equations of motion)
 
-bool FGJSBsim::update( int multiloop ) {
+void
+FGJSBsim::update( int multiloop ) {
 
     int i;
 
@@ -306,7 +307,6 @@ bool FGJSBsim::update( int multiloop ) {
     // translate JSBsim back to FG structure so that the
     // autopilot (and the rest of the sim can use the updated values
     copy_from_JSBsim();
-    return true;
 }
 
 /******************************************************************************/

src/FDM/JSBSim.hxx

@@ -215,7 +215,7 @@ public:
     /** Update the position based on inputs, positions, velocities, etc.
         @param multiloop number of times to loop through the FDM
 	      @return true if successful */
-    bool update( int multiloop );
+    void update( int multiloop );
     bool ToggleDataLogging(bool state);
     bool ToggleDataLogging(void);
     void do_trim(void);

src/FDM/JSBSim/FGAircraft.cpp

@@ -107,16 +107,14 @@ FGAircraft::FGAircraft(FGFDMExec* fdmex) : FGModel(fdmex)
   WingIncidence=0;
   impending_stall = 0;
 
-  if (debug_lvl & 2) cout << "Instantiated: " << Name << endl;
+  Debug(0);
 }
 
-
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-
 FGAircraft::~FGAircraft()
 {
-  if (debug_lvl & 2) cout << "Destroyed:    FGAircraft" << endl;
+  Debug(1);
 }
 
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -376,9 +374,43 @@ bool FGAircraft::ReadOutput(FGConfigFile* AC_cfg)
 }
 
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+//    The bitmasked value choices are as follows:
+//    unset: In this case (the default) JSBSim would only print
+//       out the normally expected messages, essentially echoing
+//       the config files as they are read. If the environment
+//       variable is not set, debug_lvl is set to 1 internally
+//    0: This requests JSBSim not to output any messages
+//       whatsoever.
+//    1: This value explicity requests the normal JSBSim
+//       startup messages
+//    2: This value asks for a message to be printed out when
+//       a class is instantiated
+//    4: When this value is set, a message is displayed when a
+//       FGModel object executes its Run() method
+//    8: When this value is set, various runtime state variables
+//       are printed out periodically
+//    16: When set various parameters are sanity checked and
+//       a message is printed out when they go out of bounds
 
 void FGAircraft::Debug(int from)
 {
-    //TODO: Add your source code here
+  if (debug_lvl <= 0) return;
+
+  if (debug_lvl & 1) { // Standard console startup message output
+    if (from == 0) { // Constructor
+    }
+  }
+  if (debug_lvl & 2 ) { // Instantiation/Destruction notification
+    if (from == 0) cout << "Instantiated: FGAircraft" << endl;
+    if (from == 1) cout << "Destroyed:    FGAircraft" << endl;
+  }
+  if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
+  }
+  if (debug_lvl & 8 ) { // Runtime state variables
+  }
+  if (debug_lvl & 16) { // Sanity checking
+  }
+  if (debug_lvl & 32) { // Turbulence
+  }
 }
 

src/FDM/LaRCsim.cxx

@@ -97,7 +97,7 @@ void FGLaRCsim::init() {
 
 
 // Run an iteration of the EOM (equations of motion)
-bool FGLaRCsim::update( int multiloop ) {
+void FGLaRCsim::update( int multiloop ) {
 
     if ( aero->getStringValue() == "c172" ) {
 	// set control inputs
@@ -215,8 +215,6 @@ bool FGLaRCsim::update( int multiloop ) {
     if ( save_alt < -9000.0 ) {
 	set_Altitude( save_alt );
     }
-
-    return true;
 }
 
 

src/FDM/LaRCsim.hxx

@@ -58,7 +58,7 @@ public:
     void init();
 
     // update position based on inputs, positions, velocities, etc.
-    bool update( int multiloop );
+    void update( int multiloop );
     
     // Positions
     void set_Latitude(double lat);  //geocentric

src/FDM/MagicCarpet.cxx

@@ -49,7 +49,7 @@ void FGMagicCarpet::init() {
 
 
 // Run an iteration of the EOM (equations of motion)
-bool FGMagicCarpet::update( int multiloop ) {
+void FGMagicCarpet::update( int multiloop ) {
     // cout << "FGLaRCsim::update()" << endl;
 
     double time_step = get_delta_t() * multiloop;
@@ -102,6 +102,4 @@ bool FGMagicCarpet::update( int multiloop ) {
     // cout << "(setto) sea level radius (ft) = " << get_Sea_level_radius() << endl;
     _set_Sea_level_radius( sl_radius * SG_METER_TO_FEET);
     _set_Altitude( get_Altitude() + climb );
-
-    return true;
 }

src/FDM/MagicCarpet.hxx

@@ -38,7 +38,7 @@ public:
     void init();
 
     // update position based on inputs, positions, velocities, etc.
-    bool update( int multiloop );
+    void update( int multiloop );
 
 };
 

src/FDM/NullFDM.cxx

@@ -43,8 +43,6 @@ void FGNullFDM::init() {
 // Run an iteration of the EOM.  This is a NOP here because the flight
 // model values are getting filled in elsewhere (most likely from some
 // external source.)
-bool FGNullFDM::update( int multiloop ) {
+void FGNullFDM::update( int multiloop ) {
     // cout << "FGNullFDM::update()" << endl;
-
-    return true;
 }

src/FDM/NullFDM.hxx

@@ -39,7 +39,7 @@ public:
     void init();
 
     // update position based on inputs, positions, velocities, etc.
-    bool update( int multiloop );
+    void update( int multiloop );
 };
 
 

src/FDM/YASim/YASim.cxx

@@ -172,11 +172,11 @@ void YASim::init()
     set_inited(true);
 }
 
-bool YASim::update(int iterations)
+void YASim::update(int iterations)
 {
     // If we're crashed, then we don't care
     if(_fdm->getAirplane()->getModel()->isCrashed())
-	return true;
+      return;
 
     int i;
     for(i=0; i<iterations; i++) {
@@ -193,8 +193,6 @@ bool YASim::update(int iterations)
             _updateCount = 0;
         }
     }
-
-    return true; // what does this mean?
 }
 
 void YASim::copyToYASim(bool copyState)

src/FDM/YASim/YASim.hxx

@@ -13,7 +13,7 @@ public:
     virtual void init();
 
     // Run an iteration
-    virtual bool update(int iterations);
+    virtual void update(int iterations);
 
  private:
     void report();

src/FDM/flight.cxx

@@ -495,15 +495,9 @@ FGInterface::free_gear_units ()
  * Update the state of the FDM (i.e. run the equations of motion).
  */
 void
-FGInterface::update ()
+FGInterface::update (int dt)
 {
-  update(1);
-}
-
-
-bool FGInterface::update( int multi_loop ) {
     cout << "dummy update() ... SHOULDN'T BE CALLED!" << endl;
-    return false;
 }
 
 

src/FDM/flight.hxx

@@ -522,8 +522,7 @@ public:
     virtual void init ();
     virtual void bind ();
     virtual void unbind ();
-    virtual void update ();
-    virtual bool update( int multi_loop );
+    virtual void update(int dt);
     virtual bool ToggleDataLogging(bool state) { return false; }
     virtual bool ToggleDataLogging(void) { return false; }
 

src/Input/input.cxx

@@ -204,7 +204,7 @@ FGInput::unbind ()
 }
 
 void 
-FGInput::update ()
+FGInput::update (int dt)
 {
   _update_keyboard();
   _update_joystick();

src/Input/input.hxx

@@ -185,7 +185,7 @@ public:
   virtual void init ();
   virtual void bind ();
   virtual void unbind ();
-  virtual void update ();
+  virtual void update (int dt);
 
 
   /**

src/Main/fgfs.hxx

@@ -150,7 +150,7 @@ public:
    * update its state.  If the subsystem requires delta time information,
    * it should track it itself.</p>
    */
-  virtual void update () = 0;
+  virtual void update (int dt) = 0;
 
 };
 

src/Main/main.cxx

@@ -861,10 +861,10 @@ void fgRenderFrame( void ) {
 	// glDisable( GL_TEXTURE_2D );
 
 	// update the input subsystem
-	current_input.update();
+	current_input.update(1); // FIXME: use real dt
 
 	// update the controls subsystem
-	globals->get_controls()->update();
+	globals->get_controls()->update(1); // FIXME: use real dt
 
 	hud_and_panel->apply();
 	fgCockpitUpdate();
@@ -875,7 +875,7 @@ void fgRenderFrame( void ) {
 
 	// update the panel subsystem
 	if ( current_panel != NULL ) {
-	    current_panel->update();
+	    current_panel->update(1); // FIXME: use real dt
 	}
 
 	// We can do translucent menus, so why not. :-)
@@ -1024,7 +1024,7 @@ void fgUpdateTimeDepCalcs() {
 				  cur_fdm_state->get_Latitude() );
 
     // Update radio stack model
-    current_radiostack->update();
+    current_radiostack->update(1); // FIXME: use dt
 }
 
 
@@ -1229,8 +1229,8 @@ static void fgMainLoop( void ) {
     // Run audio scheduler
 #ifdef ENABLE_AUDIO_SUPPORT
     if ( fgGetBool("/sim/sound") && globals->get_soundmgr()->is_working() ) {
-	globals->get_fx()->update();
-	globals->get_soundmgr()->update();
+	globals->get_fx()->update(1); // FIXME: use dt
+	globals->get_soundmgr()->update(1); // FIXME: use dt
     }
 #endif
 

src/Scenery/scenery.cxx

@@ -61,7 +61,7 @@ FGScenery::~FGScenery() {
 void FGScenery::init() {
 }
 
-void FGScenery::update() {
+void FGScenery::update(int dt) {
 }
 
 void FGScenery::bind() {

src/Scenery/scenery.hxx

@@ -67,7 +67,7 @@ public:
     void init ();
     void bind ();
     void unbind ();
-    void update ();
+    void update (int dt);
 
     inline double get_cur_elev() const { return cur_elev; }
     inline void set_cur_elev( double e ) { cur_elev = e; }

src/Sound/fg_fx.cxx

@@ -215,7 +215,7 @@ FGFX::unbind ()
 }
 
 void
-FGFX::update ()
+FGFX::update (int dt)
 {
   FGSoundMgr * mgr = globals->get_soundmgr();
   int i;

src/Sound/fg_fx.hxx

@@ -58,7 +58,7 @@ public:
   virtual void init ();
   virtual void bind ();
   virtual void unbind ();
-  virtual void update ();
+  virtual void update (int dt);
 
 private:
 

src/Sound/soundmgr.cxx

@@ -121,7 +121,7 @@ void FGSoundMgr::unbind ()
 
 
 // run the audio scheduler
-void FGSoundMgr::update() {
+void FGSoundMgr::update(int dt) {
     SGTimeStamp current;
     current.stamp();
 

src/Sound/soundmgr.hxx

@@ -121,7 +121,7 @@ public:
     /**
      * Run the audio scheduler.
      */
-    void update();
+    void update(int dt);
 
 
     // is audio working?