]> git.mxchange.org Git - flightgear.git/blobdiff - src/FDM/JSBSim.cxx
Sync with current JSBSim devel code.
[flightgear.git] / src / FDM / JSBSim.cxx
index 376afdfc28198a2653572fd0814cd0ba868cf731..68997a3424f31b35727eae8bcbd45ab1fed87632 100644 (file)
 
 #include <simgear/constants.h>
 #include <simgear/debug/logstream.hxx>
-#include <simgear/math/fg_geodesy.hxx>
+#include <simgear/math/sg_geodesy.hxx>
 #include <simgear/misc/fgpath.hxx>
 
 #include <Scenery/scenery.hxx>
 
 #include <Aircraft/aircraft.hxx>
 #include <Controls/controls.hxx>
-#include <Main/options.hxx>
+#include <Main/globals.hxx>
 
 #include <FDM/JSBSim/FGFDMExec.h>
 #include <FDM/JSBSim/FGAircraft.h>
 #include <FDM/JSBSim/FGAuxiliary.h>
 #include <FDM/JSBSim/FGDefs.h>
 #include <FDM/JSBSim/FGInitialCondition.h>
-#include <FDM/JSBSim/FGTrimLong.h>
+#include <FDM/JSBSim/FGTrim.h>
 #include <FDM/JSBSim/FGAtmosphere.h>
 
 #include "JSBSim.hxx"
 
 /******************************************************************************/
 
+FGJSBsim::FGJSBsim(void) {
+    bool result;
+  
+    fdmex=new FGFDMExec;
+    fgic=new FGInitialCondition(fdmex);
+    needTrim=true;
+  
+    FGPath aircraft_path( globals->get_options()->get_fg_root() );
+    aircraft_path.append( "Aircraft" );
+
+    FGPath engine_path( globals->get_options()->get_fg_root() );
+    engine_path.append( "Engine" );
+    float dt = 1.0 / globals->get_options()->get_model_hz();
+    fdmex->GetState()->Setdt( dt );
+
+    result = fdmex->LoadModel( aircraft_path.str(),
+                              engine_path.str(),
+                              globals->get_options()->get_aircraft() );
+    int Neng=fdmex->GetAircraft()->GetNumEngines();
+    FG_LOG(FG_FLIGHT,FG_INFO, "Neng: " << Neng );
+    for(int i=0;i<Neng;i++) {
+       add_engine( FGEngInterface() );
+    }  
+
+}
+
+/******************************************************************************/
+FGJSBsim::~FGJSBsim(void) {
+    if(fdmex != NULL) {
+       delete fdmex;
+       delete fgic;
+    }  
+}
+
+/******************************************************************************/
+
 // Initialize the JSBsim flight model, dt is the time increment for
 // each subsequent iteration through the EOM
 
-int FGJSBsim::init( double dt ) {
-
-  bool result;
-
-  FG_LOG( FG_FLIGHT, FG_INFO, "Starting and initializing JSBsim" );
-  FG_LOG( FG_FLIGHT, FG_INFO, "  created FDMExec" );
-
-  FGPath aircraft_path( current_options.get_fg_root() );
-  aircraft_path.append( "Aircraft" );
-
-  FGPath engine_path( current_options.get_fg_root() );
-  engine_path.append( "Engine" );
-
-  FDMExec.GetState()->Setdt( dt );
-
-  result = FDMExec.GetAircraft()->LoadAircraft( aircraft_path.str(),
-                                       engine_path.str(),
-                                       current_options.get_aircraft() );
-
-  if (result) {
-    FG_LOG( FG_FLIGHT, FG_INFO, "  loaded aircraft" << current_options.get_aircraft() );
-  } else {
-    FG_LOG( FG_FLIGHT, FG_INFO, "  aircraft" << current_options.get_aircraft()
-                                << " does not exist");
-    return 0;
-  }
-
-  FDMExec.GetAtmosphere()->UseInternal();
-
-  FG_LOG( FG_FLIGHT, FG_INFO, "  Initializing JSBSim with:" );
-
-  FGInitialCondition *fgic = new FGInitialCondition(&FDMExec);
-  fgic->SetAltitudeFtIC(get_Altitude());
-  if((current_options.get_mach() < 0) && (current_options.get_vc() < 0 )) {
-    fgic->SetUBodyFpsIC(current_options.get_uBody());
-    fgic->SetVBodyFpsIC(current_options.get_vBody());
-    fgic->SetWBodyFpsIC(current_options.get_wBody());
-    FG_LOG(FG_FLIGHT,FG_INFO, "  u,v,w= " << current_options.get_uBody()
-           << ", " << current_options.get_vBody()
-           << ", " << current_options.get_wBody());
-  } else if (current_options.get_vc() < 0) {
-    fgic->SetMachIC(current_options.get_mach());
-    FG_LOG(FG_FLIGHT,FG_INFO, "  mach: " << current_options.get_mach() );
-  } else {
-    fgic->SetVcalibratedKtsIC(current_options.get_vc());
-    FG_LOG(FG_FLIGHT,FG_INFO, "  vc: " << current_options.get_vc() );
-    //this should cover the case in which no speed switches are used
-    //current_options.get_vc() will return zero by default
-  }
-
-
-  fgic->SetRollAngleRadIC(get_Phi());
-  fgic->SetPitchAngleRadIC(get_Theta());
-  fgic->SetHeadingRadIC(get_Psi());
-//  fgic->SetLatitudeRadIC(get_Latitude());
-  fgic->SetLatitudeRadIC(get_Lat_geocentric());
-  fgic->SetLongitudeRadIC(get_Longitude());
-
-  FDMExec.GetPosition()->SetRunwayRadius(scenery.cur_radius*METER_TO_FEET);
-  FDMExec.GetPosition()->SetSeaLevelRadius(get_Sea_level_radius());
-
-  FG_LOG( FG_FLIGHT, FG_INFO, "  phi: " <<  get_Phi());
-  FG_LOG( FG_FLIGHT, FG_INFO, "  theta: " <<  get_Theta() );
-  FG_LOG( FG_FLIGHT, FG_INFO, "  psi: " <<  get_Psi() );
-  FG_LOG( FG_FLIGHT, FG_INFO, "  lat: " <<  get_Latitude() );
-  FG_LOG( FG_FLIGHT, FG_INFO, "  lon: " <<  get_Longitude() );
-  FG_LOG( FG_FLIGHT, FG_INFO, "  alt: " <<  get_Altitude() );
-
-  //must check > 0, != 0 will give bad result if --notrim set
-  if(current_options.get_trim_mode() > 0) {
-    FDMExec.RunIC(fgic);
-    FG_LOG( FG_FLIGHT, FG_INFO, "  Starting trim..." );
-    FGTrimLong *fgtrim=new FGTrimLong(&FDMExec,fgic);
-    fgtrim->DoTrim();
-    fgtrim->Report();
-    fgtrim->TrimStats();
-    fgtrim->ReportState();
-
-    controls.set_elevator_trim(FDMExec.GetFCS()->GetPitchTrimCmd());
-    controls.set_throttle(FGControls::ALL_ENGINES,FDMExec.GetFCS()->GetThrottleCmd(0)/100);
-    //the trimming routine only knows how to get 1 value for throttle
+bool FGJSBsim::init( double dt ) {
 
-    
-    delete fgtrim;
-    FG_LOG( FG_FLIGHT, FG_INFO, "  Trim complete." );
-  } else {
-    FG_LOG( FG_FLIGHT, FG_INFO, "  Initializing without trim" );
-    FDMExec.GetState()->Initialize(fgic);
+    bool result;
 
-  }
+    FG_LOG( FG_FLIGHT, FG_INFO, "Starting and initializing JSBsim" );
 
-  delete fgic;
+#if 0
+    FGPath aircraft_path( globals->get_options()->get_fg_root() );
+    aircraft_path.append( "Aircraft" );
 
-  FG_LOG( FG_FLIGHT, FG_INFO, "  loaded initial conditions" );
+    FGPath engine_path( globals->get_options()->get_fg_root() );
+    engine_path.append( "Engine" );
 
-  FG_LOG( FG_FLIGHT, FG_INFO, "  set dt" );
+    fdmex->GetState()->Setdt( dt );
 
-  FG_LOG( FG_FLIGHT, FG_INFO, "Finished initializing JSBSim" );
+    result = fdmex->LoadModel( aircraft_path.str(),
+                              engine_path.str(),
+                              globals->get_options()->get_aircraft() );
+#endif
 
-  copy_from_JSBsim();
-  
+    if (result) {
+       FG_LOG( FG_FLIGHT, FG_INFO, "  loaded aircraft " << globals->get_options()->get_aircraft() );
+    } else {
+       FG_LOG( FG_FLIGHT, FG_INFO, "  aircraft "
+               << globals->get_options()->get_aircraft()
+               << " does not exist" );
+       return false;
+    }
+    
+    fdmex->GetAtmosphere()->UseInternal();
   
-  return 1;
-}
-
-/******************************************************************************/
+    FG_LOG( FG_FLIGHT, FG_INFO, "  Initializing JSBSim with:" );
+    switch(fgic->GetSpeedSet()) {
+    case setned:
+       FG_LOG(FG_FLIGHT,FG_INFO, "  Vn,Ve,Vd= " 
+              << fdmex->GetPosition()->GetVn()
+              << ", " << fdmex->GetPosition()->GetVe()
+              << ", " << fdmex->GetPosition()->GetVd()
+              << " ft/s");
+       break;       
+    case setuvw:
+       FG_LOG(FG_FLIGHT,FG_INFO, "  U,V,W= " 
+              << fdmex->GetTranslation()->GetUVW()(1)
+              << ", " << fdmex->GetTranslation()->GetUVW()(2)
+              << ", " << fdmex->GetTranslation()->GetUVW()(3)
+              << " ft/s");
+       break;       
+    case setmach:
+       FG_LOG(FG_FLIGHT,FG_INFO, "  Mach: " 
+              << fdmex->GetTranslation()->GetMach() );
+       break;
+    case setvc:
+    default:
+       FG_LOG(FG_FLIGHT,FG_INFO, "  Indicated Airspeed: " 
+              << fdmex->GetAuxiliary()->GetVcalibratedKTS() << " knots" );
+      
+    }
 
-// Run an iteration of the EOM (equations of motion)
+    //FG_LOG( FG_FLIGHT, FG_INFO, "  gamma: " <<  globals->get_options()->get_Gamma());
+    FG_LOG( FG_FLIGHT, FG_INFO, "  Bank Angle: " 
+           <<  fdmex->GetRotation()->Getphi()*RADTODEG << " deg");
+    FG_LOG( FG_FLIGHT, FG_INFO, "  Pitch Angle: " 
+           << fdmex->GetRotation()->Gettht()*RADTODEG << " deg"  );
+    FG_LOG( FG_FLIGHT, FG_INFO, "  True Heading: " 
+           << fdmex->GetRotation()->Getpsi()*RADTODEG << " deg"  );
+    FG_LOG( FG_FLIGHT, FG_INFO, "  Latitude: " 
+           <<  fdmex->GetPosition()->GetLatitude() << " deg" );
+    FG_LOG( FG_FLIGHT, FG_INFO, "  Longitude: " 
+           <<  fdmex->GetPosition()->GetLongitude() << " deg"  );
+  
+    // for debug only
+    /* FG_LOG( FG_FLIGHT, FG_DEBUG, "  FGJSBSim::get_Altitude(): " <<  get_Altitude() );
+       FG_LOG( FG_FLIGHT, FG_DEBUG, "  FGJSBSim::get_Sea_level_radius(): " << get_Sea_level_radius()  );
+       FG_LOG( FG_FLIGHT, FG_DEBUG, "  scenery.cur_radius*METER_TO_FEET: "
+       <<  scenery.cur_radius*METER_TO_FEET );
+       FG_LOG( FG_FLIGHT, FG_DEBUG, "  Calculated Terrain ASL: " << endl 
+       << "    " << "scenery.cur_radius*METER_TO_FEET -get_Sea_level_radius()= " 
+       <<  scenery.cur_radius*METER_TO_FEET - get_Sea_level_radius()  );
 
-int FGJSBsim::update( int multiloop ) {
-  double save_alt = 0.0;
-  double time_step = (1.0 / current_options.get_model_hz()) * multiloop;
-  double start_elev = get_Altitude();
+       FG_LOG( FG_FLIGHT, FG_DEBUG, "  Calculated Aircraft AGL: " << endl 
+       << "    " << "get_Altitude() + get_Sea_level_radius() - scenery.cur_radius*METER_TO_FEET= " 
+       <<  get_Altitude() + get_Sea_level_radius()- scenery.cur_radius*METER_TO_FEET );
+       FG_LOG( FG_FLIGHT, FG_DEBUG, "  globals->get_options()->get_altitude(): " 
+       <<  globals->get_options()->get_altitude() );
+       FG_LOG( FG_FLIGHT, FG_DEBUG, "  FGBFI::getAltitude(): " 
+       <<  FGBFI::getAltitude() );    */
 
-  // lets try to avoid really screwing up the JSBsim model
-  if ( get_Altitude() < -9000 ) {
-    save_alt = get_Altitude();
-    set_Altitude( 0.0 );
-  }
 
-  // copy control positions into the JSBsim structure
+    FG_LOG( FG_FLIGHT, FG_INFO, "  loaded initial conditions" );
 
-  FDMExec.GetFCS()->SetDaCmd( controls.get_aileron());
-  FDMExec.GetFCS()->SetDeCmd( controls.get_elevator());
-  FDMExec.GetFCS()->SetPitchTrimCmd(controls.get_elevator_trim());
-  FDMExec.GetFCS()->SetDrCmd( controls.get_rudder());
-  FDMExec.GetFCS()->SetDfCmd( controls.get_flaps() );
-  FDMExec.GetFCS()->SetDsbCmd( 0.0 ); //speedbrakes
-  FDMExec.GetFCS()->SetDspCmd( 0.0 ); //spoilers
-  FDMExec.GetFCS()->SetThrottleCmd( FGControls::ALL_ENGINES,
-                                    controls.get_throttle( 0 ) * 100.0 );
+    FG_LOG( FG_FLIGHT, FG_INFO, "  set dt" );
 
-  // FCS->SetBrake( controls.get_brake( 0 ) );
+    FG_LOG( FG_FLIGHT, FG_INFO, "Finished initializing JSBSim" );
 
-  // Inform JSBsim of the local terrain altitude; uncommented 5/3/00
-  //  FDMExec.GetPosition()->SetRunwayElevation(get_Runway_altitude()); // seems to work
-  FDMExec.GetPosition()->SetRunwayRadius(scenery.cur_radius*METER_TO_FEET);
-  FDMExec.GetPosition()->SetSeaLevelRadius(get_Sea_level_radius());
+    return true;
+}
 
-  FDMExec.GetAtmosphere()->SetExTemperature(get_Static_temperature());
-  FDMExec.GetAtmosphere()->SetExPressure(get_Static_pressure());
-  FDMExec.GetAtmosphere()->SetExDensity(get_Density());
-  FDMExec.GetAtmosphere()->SetWindNED(get_V_north_airmass(),
-                                      get_V_east_airmass(),
-                                      get_V_down_airmass());
+/******************************************************************************/
 
-  for ( int i = 0; i < multiloop; i++ ) {
-    FDMExec.Run();
-  }
+// Run an iteration of the EOM (equations of motion)
 
-  // printf("%d FG_Altitude = %.2f\n", i, FG_Altitude * 0.3048);
-  // printf("%d Altitude = %.2f\n", i, Altitude * 0.3048);
+bool FGJSBsim::update( int multiloop ) {
+  
+    int i;
+  
+    double save_alt = 0.0;
+  
+    // lets try to avoid really screwing up the JSBsim model
+    if ( get_Altitude() < -9000 ) {
+       save_alt = get_Altitude();
+       set_Altitude( 0.0 );
+    }
 
-  // translate JSBsim back to FG structure so that the
-  // autopilot (and the rest of the sim can use the updated values
+    if(needTrim && (globals->get_options()->get_trim_mode() > 0)) {
+       FGTrim *fgtrim;
+       if(fgic->GetVcalibratedKtsIC() < 10 ) {
+               fgic->SetVcalibratedKtsIC(0.0);
+               fgtrim=new FGTrim(fdmex,fgic,tGround);
+       } else {
+               fgtrim=new FGTrim(fdmex,fgic,tLongitudinal);
+       }       
+       if(!fgtrim->DoTrim()) {
+           fgtrim->Report();
+           fgtrim->TrimStats();
+       }  
+       fgtrim->ReportState();
+       delete fgtrim;
+    
+       needTrim=false;
+    
+         
+       controls.set_elevator_trim(fdmex->GetFCS()->GetPitchTrimCmd());
+       controls.set_elevator(fdmex->GetFCS()->GetDeCmd());
+       controls.set_throttle(FGControls::ALL_ENGINES,
+                             fdmex->GetFCS()->GetThrottleCmd(0)/100.0);
+       controls.set_aileron(fdmex->GetFCS()->GetDaCmd());
+       controls.set_rudder(fdmex->GetFCS()->GetDrCmd());
+    
+       FG_LOG( FG_FLIGHT, FG_INFO, "  Trim complete" );
+    }  
+  
+    for( i=0; i<get_num_engines(); i++ ) {
+       get_engine(i)->set_RPM( controls.get_throttle(i)*2700 );
+       get_engine(i)->set_Throttle( controls.get_throttle(i) );
+    }
+    copy_to_JSBsim();
+  
+    for ( int i = 0; i < multiloop; i++ ) {
+       fdmex->Run();
+    }
 
-  copy_from_JSBsim();
+    // printf("%d FG_Altitude = %.2f\n", i, FG_Altitude * 0.3048);
+    // printf("%d Altitude = %.2f\n", i, Altitude * 0.3048);
 
-  // but lets restore our original bogus altitude when we are done
+    // translate JSBsim back to FG structure so that the
+    // autopilot (and the rest of the sim can use the updated values
 
-  if ( save_alt < -9000.0 ) {
-    set_Altitude( save_alt );
-  }
+    copy_from_JSBsim();
+    
 
-  double end_elev = get_Altitude();
-  //if ( time_step > 0.0 ) {
-    // feet per second
-  //  set_Climb_Rate( (end_elev - start_elev) / time_step );
-  //}
+    // but lets restore our original bogus altitude when we are done
 
-  return 1;
+    if ( save_alt < -9000.0 ) {
+       set_Altitude( save_alt );
+    }
+  
+    //climb rate now set from FDM in copy_from_x()
+    return true;
 }
 
 /******************************************************************************/
 
 // Convert from the FGInterface struct to the JSBsim generic_ struct
 
-int FGJSBsim::copy_to_JSBsim() {
-  return 1;
+bool FGJSBsim::copy_to_JSBsim() {
+    // copy control positions into the JSBsim structure
+
+    fdmex->GetFCS()->SetDaCmd( controls.get_aileron());
+    fdmex->GetFCS()->SetDeCmd( controls.get_elevator());
+    fdmex->GetFCS()->SetPitchTrimCmd(controls.get_elevator_trim());
+    fdmex->GetFCS()->SetDrCmd( -1*controls.get_rudder());
+    fdmex->GetFCS()->SetDfCmd( controls.get_flaps() );
+    fdmex->GetFCS()->SetDsbCmd( 0.0 ); //speedbrakes
+    fdmex->GetFCS()->SetDspCmd( 0.0 ); //spoilers
+    fdmex->GetFCS()->SetThrottleCmd( FGControls::ALL_ENGINES,
+                                    controls.get_throttle( 0 ) * 100.0 );
+
+    fdmex->GetFCS()->SetLBrake( controls.get_brake( 0 ) );
+    fdmex->GetFCS()->SetRBrake( controls.get_brake( 1 ) );
+    fdmex->GetFCS()->SetCBrake( controls.get_brake( 2 ) );
+
+    fdmex->GetPosition()->SetRunwayRadius(scenery.cur_radius*METER_TO_FEET);
+    fdmex->GetPosition()->SetSeaLevelRadius(get_Sea_level_radius());
+
+    fdmex->GetAtmosphere()->SetExTemperature(get_Static_temperature());
+    fdmex->GetAtmosphere()->SetExPressure(get_Static_pressure());
+    fdmex->GetAtmosphere()->SetExDensity(get_Density());
+    fdmex->GetAtmosphere()->SetWindNED(get_V_north_airmass(),
+                                      get_V_east_airmass(),
+                                      get_V_down_airmass());
+
+    return true;
 }
 
 /******************************************************************************/
 
 // Convert from the JSBsim generic_ struct to the FGInterface struct
 
-int FGJSBsim::copy_from_JSBsim() {
-
-  set_Inertias( FDMExec.GetAircraft()->GetMass(),
-                FDMExec.GetAircraft()->GetIxx(),
-                FDMExec.GetAircraft()->GetIyy(),
-                FDMExec.GetAircraft()->GetIzz(),
-                FDMExec.GetAircraft()->GetIxz() );
+bool FGJSBsim::copy_from_JSBsim() {
+    unsigned i, j;
   
-  set_CG_Position ( FDMExec.GetAircraft()->GetXYZcg()(1),
-                    FDMExec.GetAircraft()->GetXYZcg()(2),
-                    FDMExec.GetAircraft()->GetXYZcg()(3) );
+    _set_Inertias( fdmex->GetAircraft()->GetMass(),
+                  fdmex->GetAircraft()->GetIxx(),
+                  fdmex->GetAircraft()->GetIyy(),
+                  fdmex->GetAircraft()->GetIzz(),
+                  fdmex->GetAircraft()->GetIxz() );
   
+    _set_CG_Position( fdmex->GetAircraft()->GetXYZcg()(1),
+                     fdmex->GetAircraft()->GetXYZcg()(2),
+                     fdmex->GetAircraft()->GetXYZcg()(3) );
   
-  set_Accels_Local( FDMExec.GetPosition()->GetVelDot()(1),
-                    FDMExec.GetPosition()->GetVelDot()(2),
-                    FDMExec.GetPosition()->GetVelDot()(3) );
-                    
-  set_Accels_Body ( FDMExec.GetTranslation()->GetUVWdot()(1),
-                    FDMExec.GetTranslation()->GetUVWdot()(2),
-                    FDMExec.GetTranslation()->GetUVWdot()(3) );
+    _set_Accels_Body( fdmex->GetTranslation()->GetUVWdot()(1),
+                     fdmex->GetTranslation()->GetUVWdot()(2),
+                     fdmex->GetTranslation()->GetUVWdot()(3) );
   
-  set_Accels_CG_Body ( FDMExec.GetTranslation()->GetUVWdot()(1),
-                       FDMExec.GetTranslation()->GetUVWdot()(2),
-                       FDMExec.GetTranslation()->GetUVWdot()(3) );
+    _set_Accels_CG_Body( fdmex->GetTranslation()->GetUVWdot()(1),
+                        fdmex->GetTranslation()->GetUVWdot()(2),
+                        fdmex->GetTranslation()->GetUVWdot()(3) );
   
-  //set_Accels_CG_Body_N ( FDMExec.GetTranslation()->GetNcg()(1),
-  //                       FDMExec.GetTranslation()->GetNcg()(2),
-  //                       FDMExec.GetTranslation()->GetNcg()(3) );
-  //
+    //_set_Accels_CG_Body_N ( fdmex->GetTranslation()->GetNcg()(1),
+    //                       fdmex->GetTranslation()->GetNcg()(2),
+    //                       fdmex->GetTranslation()->GetNcg()(3) );
+    //
+    _set_Accels_Pilot_Body( fdmex->GetAuxiliary()->GetPilotAccel()(1),
+                           fdmex->GetAuxiliary()->GetPilotAccel()(2),
+                           fdmex->GetAuxiliary()->GetPilotAccel()(3) );
   
-  set_Accels_Pilot_Body( FDMExec.GetAuxiliary()->GetPilotAccel()(1),
-                         FDMExec.GetAuxiliary()->GetPilotAccel()(2),
-                         FDMExec.GetAuxiliary()->GetPilotAccel()(3) );
+    //_set_Accels_Pilot_Body_N( fdmex->GetAuxiliary()->GetNpilot()(1),
+    //                         fdmex->GetAuxiliary()->GetNpilot()(2),
+    //                         fdmex->GetAuxiliary()->GetNpilot()(3) );
   
-  //set_Accels_Pilot_Body_N( FDMExec.GetAuxiliary()->GetNpilot()(1),
-  //                         FDMExec.GetAuxiliary()->GetNpilot()(2),
-  //                         FDMExec.GetAuxiliary()->GetNpilot()(3) );
+    _set_Nlf( fdmex->GetAircraft()->GetNlf() );
   
-                           
-  
-  set_Nlf( FDMExec.GetAircraft()->GetNlf());                       
-  
-  
-   
-  // Velocities
+    // Velocities
 
-  set_Velocities_Local( FDMExec.GetPosition()->GetVn(),
-                        FDMExec.GetPosition()->GetVe(),
-                        FDMExec.GetPosition()->GetVd() );
+    _set_Velocities_Local( fdmex->GetPosition()->GetVn(),
+                          fdmex->GetPosition()->GetVe(),
+                          fdmex->GetPosition()->GetVd() );
 
-  set_Velocities_Wind_Body( FDMExec.GetTranslation()->GetUVW()(1),
-                            FDMExec.GetTranslation()->GetUVW()(2),
-                            FDMExec.GetTranslation()->GetUVW()(3)  );
-  
-  set_V_equiv_kts( FDMExec.GetAuxiliary()->GetVequivalentKTS() );
+    _set_Velocities_Wind_Body( fdmex->GetTranslation()->GetUVW()(1),
+                              fdmex->GetTranslation()->GetUVW()(2),
+                              fdmex->GetTranslation()->GetUVW()(3) );
+    
+    _set_V_rel_wind( fdmex->GetTranslation()->GetVt() );
+    
+    _set_V_equiv_kts( fdmex->GetAuxiliary()->GetVequivalentKTS() );
 
-  //set_V_calibrated( FDMExec.GetAuxiliary()->GetVcalibratedFPS() );
+    // _set_V_calibrated( fdmex->GetAuxiliary()->GetVcalibratedFPS() );
 
-  set_V_calibrated_kts( FDMExec.GetAuxiliary()->GetVcalibratedKTS() );
+    _set_V_calibrated_kts( fdmex->GetAuxiliary()->GetVcalibratedKTS() );
   
-  set_V_ground_speed ( FDMExec.GetPosition()->GetVground() );
-
-  set_Omega_Body( FDMExec.GetState()->GetParameter(FG_ROLLRATE),
-                  FDMExec.GetState()->GetParameter(FG_PITCHRATE),
-                  FDMExec.GetState()->GetParameter(FG_YAWRATE) );
-
-  set_Euler_Rates( FDMExec.GetRotation()->GetEulerRates()(1),
-                   FDMExec.GetRotation()->GetEulerRates()(2),
-                   FDMExec.GetRotation()->GetEulerRates()(3) );
-
-  set_Geocentric_Rates( FDMExec.GetPosition()->GetLatitudeDot(),
-                        FDMExec.GetPosition()->GetLongitudeDot(),
-                        FDMExec.GetPosition()->Gethdot() );
-
-  set_Mach_number( FDMExec.GetTranslation()->GetMach());
-
-  // Positions
-
-  double lat_geoc = FDMExec.GetPosition()->GetLatitude();
-  double lon = FDMExec.GetPosition()->GetLongitude();
-  double alt = FDMExec.GetPosition()->Geth();
-  double lat_geod, tmp_alt, sl_radius1, sl_radius2, tmp_lat_geoc;
-
-  fgGeocToGeod( lat_geoc, EQUATORIAL_RADIUS_M + alt * FEET_TO_METER,
-                &lat_geod, &tmp_alt, &sl_radius1 );
-  fgGeodToGeoc( lat_geod, alt * FEET_TO_METER, &sl_radius2, &tmp_lat_geoc );
-
-  FG_LOG( FG_FLIGHT, FG_DEBUG, "lon = " << lon << " lat_geod = " << lat_geod
-          << " lat_geoc = " << lat_geoc
-          << " alt = " << alt << " tmp_alt = " << tmp_alt * METER_TO_FEET
-          << " sl_radius1 = " << sl_radius1 * METER_TO_FEET
-          << " sl_radius2 = " << sl_radius2 * METER_TO_FEET
-          << " Equator = " << EQUATORIAL_RADIUS_FT );
-
-  set_Geocentric_Position( lat_geoc, lon,
-                           sl_radius2 * METER_TO_FEET + alt );
-  set_Geodetic_Position( lat_geod, lon, alt );
-  set_Euler_Angles( FDMExec.GetRotation()->Getphi(),
-                    FDMExec.GetRotation()->Gettht(),
-                    FDMExec.GetRotation()->Getpsi() );
-                    
-  for(int i=0; i<3; i++ ) {
-    for (int j=0; j<3; j++ ) {
-      set_T_Local_to_Body(i,j,FDMExec.GetState()->GetTl2b()(i,j));
-    }
-  }     
+    _set_V_ground_speed( fdmex->GetPosition()->GetVground() );
 
-  set_Alpha( FDMExec.GetTranslation()->Getalpha() );
-  set_Beta( FDMExec.GetTranslation()->Getbeta() );
-  
-  set_Cos_phi( FDMExec.GetRotation()->GetCosphi() );
-  //set_Sin_phi ( FDMExec.GetRotation()->GetSinpphi() );
-  
-  set_Cos_theta( FDMExec.GetRotation()->GetCostht() );
-  //set_Sin_theta ( FDMExec.GetRotation()->GetSintht() );
-  
-  //set_Cos_psi( FDMExec.GetRotation()->GetCospsi() );
-  //set_Sin_psi ( FDMExec.GetRotation()->GetSinpsi() );
-  
-  set_Gamma_vert_rad( FDMExec.GetPosition()->GetGamma() );
-  // set_Gamma_horiz_rad( Gamma_horiz_rad );
+    _set_Omega_Body( fdmex->GetRotation()->GetPQR()(1),
+                    fdmex->GetRotation()->GetPQR()(2),
+                    fdmex->GetRotation()->GetPQR()(3) );
 
+    _set_Euler_Rates( fdmex->GetRotation()->GetEulerRates()(1),
+                     fdmex->GetRotation()->GetEulerRates()(2),
+                     fdmex->GetRotation()->GetEulerRates()(3) );
 
-  set_Density( FDMExec.GetAtmosphere()->GetDensity() );
-  set_Static_pressure( FDMExec.GetAtmosphere()->GetPressure() );
-  set_Static_temperature ( FDMExec.GetAtmosphere()->GetTemperature() );
-  
-  set_Earth_position_angle( FDMExec.GetAuxiliary()->GetEarthPositionAngle() );
-  
-  /* **FIXME*** */ set_Sea_level_radius( sl_radius2 * METER_TO_FEET );
-  /* **FIXME*** */ set_Earth_position_angle( 0.0 );
+    _set_Geocentric_Rates(fdmex->GetPosition()->GetLatitudeDot(),
+                         fdmex->GetPosition()->GetLongitudeDot(),
+                         fdmex->GetPosition()->Gethdot() );
+
+    _set_Mach_number( fdmex->GetTranslation()->GetMach() );
+
+    // Positions
+    _updatePosition( fdmex->GetPosition()->GetLatitude(),
+                     fdmex->GetPosition()->GetLongitude(),
+                    fdmex->GetPosition()->Geth() );
+    
+    _set_Euler_Angles( fdmex->GetRotation()->Getphi(),
+                      fdmex->GetRotation()->Gettht(),
+                      fdmex->GetRotation()->Getpsi() );
 
-  // /* ***FIXME*** */ set_Runway_altitude( 0.0 );
+    _set_Alpha( fdmex->GetTranslation()->Getalpha() );
+    _set_Beta( fdmex->GetTranslation()->Getbeta() );
 
-  set_sin_lat_geocentric( lat_geoc );
-  set_cos_lat_geocentric( lat_geoc );
-  set_sin_cos_longitude( lon );
-  set_sin_cos_latitude( lat_geod );
+    
+    _set_Gamma_vert_rad( fdmex->GetPosition()->GetGamma() );
+    // set_Gamma_horiz_rad( Gamma_horiz_rad );
+
+    _set_Earth_position_angle( fdmex->GetAuxiliary()->GetEarthPositionAngle() );
+
+    _set_Climb_Rate( fdmex->GetPosition()->Gethdot() );
+    
+
+    for ( i = 1; i <= 3; i++ ) {
+       for ( j = 1; j <= 3; j++ ) {
+           _set_T_Local_to_Body( i, j, fdmex->GetState()->GetTl2b()(i,j) );
+       }
+    }
+    return true;
+}
+
+void FGJSBsim::snap_shot(void) {
+       fgic->SetLatitudeRadIC(get_Lat_geocentric() );
+       fgic->SetLongitudeRadIC( get_Longitude() );
+       fgic->SetAltitudeFtIC( get_Altitude() );
+       fgic->SetTerrainAltitudeFtIC( get_Runway_altitude() );
+       fgic->SetVtrueFpsIC( get_V_rel_wind() );
+       fgic->SetPitchAngleRadIC( get_Theta() );
+       fgic->SetRollAngleRadIC( get_Phi() );
+       fgic->SetTrueHeadingRadIC( get_Psi() );
+       fgic->SetClimbRateFpsIC( get_Climb_Rate() );
+}                              
+
+
+//Positions
+void FGJSBsim::set_Latitude(double lat) {
+    double sea_level_radius_meters,lat_geoc;
+    
+    FG_LOG(FG_FLIGHT,FG_INFO,"FGJSBsim::set_Latitude: " << lat ); 
+    
+    snap_shot();
+    sgGeodToGeoc( lat, get_Altitude() , &sea_level_radius_meters, &lat_geoc);
+    fgic->SetSeaLevelRadiusFtIC( sea_level_radius_meters * METER_TO_FEET  );
+    fgic->SetLatitudeRadIC( lat_geoc );
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus
+    needTrim=true;
+}  
+
+void FGJSBsim::set_Longitude(double lon) {
+    
+    FG_LOG(FG_FLIGHT,FG_INFO,"FGJSBsim::set_Longitude: " << lon );
+    
+    snap_shot();
+    fgic->SetLongitudeRadIC(lon);
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus
+    needTrim=true;
+}  
+
+void FGJSBsim::set_Altitude(double alt) {
+    double sea_level_radius_meters,lat_geoc;
+    
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Altitude: " << alt );    
+    
+    snap_shot();
+    sgGeodToGeoc( get_Latitude(), alt , &sea_level_radius_meters, &lat_geoc);
+    fgic->SetSeaLevelRadiusFtIC( sea_level_radius_meters * METER_TO_FEET );
+    fgic->SetLatitudeRadIC( lat_geoc );
+    fgic->SetAltitudeFtIC(alt);
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus
+    needTrim=true;
+}
+  
+void FGJSBsim::set_V_calibrated_kts(double vc) {
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_V_calibrated_kts: " <<  vc );
+    
+    snap_shot();
+    fgic->SetVcalibratedKtsIC(vc);
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus
+    needTrim=true;
+}  
+
+void FGJSBsim::set_Mach_number(double mach) {
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Mach_number: " <<  mach );
+    
+    snap_shot();
+    fgic->SetMachIC(mach);
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus
+    needTrim=true;
+}  
+
+void FGJSBsim::set_Velocities_Local( double north, double east, double down ){
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Velocities_Local: " 
+          << north << ", " <<  east << ", " << down ); 
+    
+    snap_shot();
+    fgic->SetVnorthFpsIC(north);
+    fgic->SetVeastFpsIC(east);
+    fgic->SetVdownFpsIC(down);
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus
+    needTrim=true;
+}  
+
+void FGJSBsim::set_Velocities_Wind_Body( double u, double v, double w){
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Velocities_Wind_Body: " 
+          << u << ", " <<  v << ", " <<  w );
+    
+    snap_shot();
+    fgic->SetUBodyFpsIC(u);
+    fgic->SetVBodyFpsIC(v);
+    fgic->SetWBodyFpsIC(w);
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus
+    needTrim=true;
+} 
+
+//Euler angles 
+void FGJSBsim::set_Euler_Angles( double phi, double theta, double psi ) {
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Euler_Angles: " 
+          << phi << ", " << theta << ", " << psi );
+    
+    snap_shot();
+    fgic->SetPitchAngleRadIC(theta);
+    fgic->SetRollAngleRadIC(phi);
+    fgic->SetTrueHeadingRadIC(psi);
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus 
+    needTrim=true;                                        
+}  
+
+//Flight Path
+void FGJSBsim::set_Climb_Rate( double roc) {
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Climb_Rate: " << roc );
+    
+    snap_shot();
+    fgic->SetClimbRateFpsIC(roc);
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus 
+    needTrim=true;                                        
+}  
+
+void FGJSBsim::set_Gamma_vert_rad( double gamma) {
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Gamma_vert_rad: " << gamma );
+    
+    snap_shot();
+    fgic->SetFlightPathAngleRadIC(gamma);
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus  
+    needTrim=true;                                       
+}  
+
+//Earth
+void FGJSBsim::set_Sea_level_radius(double slr) {
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Sea_level_radius: " << slr );
+    
+    snap_shot();
+    fgic->SetSeaLevelRadiusFtIC(slr);
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus 
+    needTrim=true;  
+}  
+
+void FGJSBsim::set_Runway_altitude(double ralt) {
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Runway_altitude: " << ralt );
+    
+    snap_shot();
+    _set_Runway_altitude( ralt );
+    fdmex->RunIC(fgic); //loop JSBSim once
+    copy_from_JSBsim(); //update the bus 
+    needTrim=true;  
+}  
+
+void FGJSBsim::set_Static_pressure(double p) { 
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Static_pressure: " << p );
+    
+    snap_shot();
+    fdmex->GetAtmosphere()->SetExPressure(p);
+    if(fdmex->GetAtmosphere()->External() == true)
+       needTrim=true;
+}
   
-  set_Climb_Rate(FDMExec.GetPosition()->Gethdot());
+void FGJSBsim::set_Static_temperature(double T) { 
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Static_temperature: " << T );
+    
+    snap_shot();
+    fdmex->GetAtmosphere()->SetExTemperature(T);
+    if(fdmex->GetAtmosphere()->External() == true)
+       needTrim=true;
+}
 
-  return 1;
+void FGJSBsim::set_Density(double rho) {
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Density: " << rho );
+    
+    snap_shot();
+    fdmex->GetAtmosphere()->SetExDensity(rho);
+    if(fdmex->GetAtmosphere()->External() == true)
+       needTrim=true;
 }
+  
+
+void FGJSBsim::set_Velocities_Local_Airmass (double wnorth, 
+                                            double weast, 
+                                            double wdown ) {
+    FG_LOG(FG_FLIGHT,FG_INFO, "FGJSBsim::set_Velocities_Local_Airmass: " 
+          << wnorth << ", " << weast << ", " << wdown );
+    
+    snap_shot();
+    fdmex->GetAtmosphere()->SetWindNED(wnorth, weast, wdown );
+    if(fdmex->GetAtmosphere()->External() == true)
+        needTrim=true;
+}