JSBSim.cxx

   1 // JSBsim.cxx -- interface to the JSBsim flight model
   2 //
   3 // Written by Curtis Olson, started February 1999.
   4 //
   5 // Copyright (C) 1999  Curtis L. Olson  - curt@flightgear.org
   6 //
   7 // This program is free software; you can redistribute it and/or
   8 // modify it under the terms of the GNU General Public License as
   9 // published by the Free Software Foundation; either version 2 of the
  10 // License, or (at your option) any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful, but
  13 // WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 // General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License
  18 // along with this program; if not, write to the Free Software
  19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 //
  21 // $Id$
  22
  23
  24 #include <simgear/compiler.h>
  25
  26 #ifdef SG_MATH_EXCEPTION_CLASH
  27 #  include <math.h>
  28 #endif
  29
  30 #include STL_STRING
  31
  32 #include <simgear/constants.h>
  33 #include <simgear/debug/logstream.hxx>
  34 #include <simgear/math/sg_geodesy.hxx>
  35 #include <simgear/misc/sg_path.hxx>
  36
  37 #include <Scenery/scenery.hxx>
  38
  39 #include <Aircraft/aircraft.hxx>
  40 #include <Controls/controls.hxx>
  41 #include <Main/globals.hxx>
  42 #include <Main/fg_props.hxx>
  43
  44 #include <FDM/JSBSim/FGFDMExec.h>
  45 #include <FDM/JSBSim/FGAircraft.h>
  46 #include <FDM/JSBSim/FGFCS.h>
  47 #include <FDM/JSBSim/FGPosition.h>
  48 #include <FDM/JSBSim/FGRotation.h>
  49 #include <FDM/JSBSim/FGState.h>
  50 #include <FDM/JSBSim/FGTranslation.h>
  51 #include <FDM/JSBSim/FGAuxiliary.h>
  52 #include <FDM/JSBSim/FGDefs.h>
  53 #include <FDM/JSBSim/FGInitialCondition.h>
  54 #include <FDM/JSBSim/FGTrim.h>
  55 #include <FDM/JSBSim/FGAtmosphere.h>
  56 #include <FDM/JSBSim/FGMassBalance.h>
  57 #include <FDM/JSBSim/FGAerodynamics.h>
  58 #include "JSBSim.hxx"
  59
  60 /******************************************************************************/
  61
  62 FGJSBsim::FGJSBsim( double dt )
  63   : FGInterface(dt)
  64 {
  65     bool result;
  66
  67     fdmex=new FGFDMExec;
  68
  69     State        = fdmex->GetState();
  70     Atmosphere   = fdmex->GetAtmosphere();
  71     FCS          = fdmex->GetFCS();
  72     MassBalance  = fdmex->GetMassBalance();
  73     Propulsion   = fdmex->GetPropulsion();
  74     Aircraft     = fdmex->GetAircraft();
  75     Translation  = fdmex->GetTranslation();
  76     Rotation     = fdmex->GetRotation();
  77     Position     = fdmex->GetPosition();
  78     Auxiliary    = fdmex->GetAuxiliary();
  79     Aerodynamics = fdmex->GetAerodynamics();
  80
  81     Atmosphere->UseInternal();
  82
  83     fgic=new FGInitialCondition(fdmex);
  84     needTrim=true;
  85
  86     SGPath aircraft_path( globals->get_fg_root() );
  87     aircraft_path.append( "Aircraft" );
  88
  89     SGPath engine_path( globals->get_fg_root() );
  90     engine_path.append( "Engine" );
  91     set_delta_t( dt );
  92     State->Setdt( dt );
  93
  94     result = fdmex->LoadModel( aircraft_path.str(),
  95                                engine_path.str(),
  96                                fgGetString("/sim/aircraft") );
  97
  98
  99     if (result) {
 100       SG_LOG( SG_FLIGHT, SG_INFO, "  loaded aircraft.");
 101     } else {
 102       SG_LOG( SG_FLIGHT, SG_INFO,
 103               "  aircraft does not exist (you may have mis-typed the name).");
 104       throw(-1);
 105     }
 106
 107     int Neng = Propulsion->GetNumEngines();
 108     SG_LOG(SG_FLIGHT,SG_INFO, "Neng: " << Neng );
 109
 110     for(int i=0;i<Neng;i++) {
 111         add_engine( FGEngInterface() );
 112     }
 113
 114     fgSetDouble("/fdm/trim/pitch-trim", FCS->GetPitchTrimCmd());
 115     fgSetDouble("/fdm/trim/throttle",   FCS->GetThrottleCmd(0));
 116     fgSetDouble("/fdm/trim/aileron",    FCS->GetDaCmd());
 117     fgSetDouble("/fdm/trim/rudder",     FCS->GetDrCmd());
 118
 119     startup_trim = fgGetNode("/sim/startup/trim", true);
 120
 121     trimmed = fgGetNode("/fdm/trim/trimmed", true);
 122     trimmed->setBoolValue(false);
 123
 124     pitch_trim = fgGetNode("/fdm/trim/pitch-trim", true );
 125     throttle_trim = fgGetNode("/fdm/trim/throttle", true );
 126     aileron_trim = fgGetNode("/fdm/trim/aileron", true );
 127     rudder_trim = fgGetNode("/fdm/trim/rudder", true );
 128 }
 129
 130 /******************************************************************************/
 131 FGJSBsim::~FGJSBsim(void) {
 132     if (fdmex != NULL) {
 133         delete fdmex; fdmex=NULL;
 134         delete fgic; fgic=NULL;
 135     }
 136 }
 137
 138 /******************************************************************************/
 139
 140 // Initialize the JSBsim flight model, dt is the time increment for
 141 // each subsequent iteration through the EOM
 142
 143 void FGJSBsim::init() {
 144
 145     SG_LOG( SG_FLIGHT, SG_INFO, "Starting and initializing JSBsim" );
 146
 147     // Explicitly call the superclass's
 148     // init method first.
 149     FGInterface::init();
 150
 151     SG_LOG( SG_FLIGHT, SG_INFO, "  Initializing JSBSim with:" );
 152
 153     switch(fgic->GetSpeedSet()) {
 154     case setned:
 155         SG_LOG(SG_FLIGHT,SG_INFO, "  Vn,Ve,Vd= "
 156                << Position->GetVn() << ", "
 157                << Position->GetVe() << ", "
 158                << Position->GetVd() << " ft/s");
 159     break;
 160     case setuvw:
 161         SG_LOG(SG_FLIGHT,SG_INFO, "  U,V,W= "
 162                << Translation->GetUVW(1) << ", "
 163                << Translation->GetUVW(2) << ", "
 164                << Translation->GetUVW(3) << " ft/s");
 165     break;
 166     case setmach:
 167         SG_LOG(SG_FLIGHT,SG_INFO, "  Mach: "
 168                << Translation->GetMach() );
 169     break;
 170     case setvc:
 171     default:
 172         SG_LOG(SG_FLIGHT,SG_INFO, "  Indicated Airspeed: "
 173                << Auxiliary->GetVcalibratedKTS() << " knots" );
 174     break;
 175     }
 176
 177     SG_LOG( SG_FLIGHT, SG_INFO, "  Bank Angle: "
 178             <<  Rotation->Getphi()*RADTODEG << " deg");
 179     SG_LOG( SG_FLIGHT, SG_INFO, "  Pitch Angle: "
 180             << Rotation->Gettht()*RADTODEG << " deg"  );
 181     SG_LOG( SG_FLIGHT, SG_INFO, "  True Heading: "
 182             << Rotation->Getpsi()*RADTODEG << " deg"  );
 183     SG_LOG( SG_FLIGHT, SG_INFO, "  Latitude: "
 184             <<  Position->GetLatitude() << " deg" );
 185     SG_LOG( SG_FLIGHT, SG_INFO, "  Longitude: "
 186             <<  Position->GetLongitude() << " deg"  );
 187
 188     SG_LOG( SG_FLIGHT, SG_INFO, "  loaded initial conditions" );
 189
 190     SG_LOG( SG_FLIGHT, SG_INFO, "  set dt" );
 191
 192     SG_LOG( SG_FLIGHT, SG_INFO, "Finished initializing JSBSim" );
 193 }
 194
 195 /******************************************************************************/
 196
 197 // Run an iteration of the EOM (equations of motion)
 198
 199 bool FGJSBsim::update( int multiloop ) {
 200
 201     int i;
 202
 203     double save_alt = 0.0;
 204
 205     copy_to_JSBsim();
 206
 207     trimmed->setBoolValue(false);
 208
 209     if ( needTrim && startup_trim->getBoolValue() ) {
 210
 211         //fgic->SetSeaLevelRadiusFtIC( get_Sea_level_radius() );
 212         //fgic->SetTerrainAltitudeFtIC( scenery.cur_elev * SG_METER_TO_FEET );
 213
 214         FGTrim *fgtrim;
 215         if(fgic->GetVcalibratedKtsIC() < 10 ) {
 216             fgic->SetVcalibratedKtsIC(0.0);
 217             fgtrim=new FGTrim(fdmex,fgic,tGround);
 218         } else {
 219             fgtrim=new FGTrim(fdmex,fgic,tLongitudinal);
 220         }
 221         if(!fgtrim->DoTrim()) {
 222             fgtrim->Report();
 223             fgtrim->TrimStats();
 224         } else {
 225             trimmed->setBoolValue(true);
 226         }
 227         fgtrim->ReportState();
 228         delete fgtrim;
 229
 230         needTrim=false;
 231
 232         pitch_trim->setDoubleValue( FCS->GetPitchTrimCmd() );
 233         throttle_trim->setDoubleValue( FCS->GetThrottleCmd(0) );
 234         aileron_trim->setDoubleValue( FCS->GetDaCmd() );
 235         rudder_trim->setDoubleValue( FCS->GetDrCmd() );
 236
 237         globals->get_controls()->set_elevator_trim(FCS->GetPitchTrimCmd());
 238         globals->get_controls()->set_elevator(FCS->GetDeCmd());
 239         globals->get_controls()->set_throttle(FGControls::ALL_ENGINES,
 240                                               FCS->GetThrottleCmd(0));
 241
 242         globals->get_controls()->set_aileron(FCS->GetDaCmd());
 243         globals->get_controls()->set_rudder( FCS->GetDrCmd());
 244
 245         SG_LOG( SG_FLIGHT, SG_INFO, "  Trim complete" );
 246     }
 247
 248     for( i=0; i<get_num_engines(); i++ ) {
 249       get_engine(i)->set_RPM( Propulsion->GetThruster(i)->GetRPM() );
 250       get_engine(i)->set_Throttle( globals->get_controls()->get_throttle(i) );
 251     }
 252
 253     for ( i=0; i < multiloop; i++ ) {
 254         fdmex->Run();
 255     }
 256
 257     // printf("%d FG_Altitude = %.2f\n", i, FG_Altitude * 0.3048);
 258     // printf("%d Altitude = %.2f\n", i, Altitude * 0.3048);
 259
 260     // translate JSBsim back to FG structure so that the
 261     // autopilot (and the rest of the sim can use the updated values
 262
 263     copy_from_JSBsim();
 264     return true;
 265 }
 266
 267 /******************************************************************************/
 268
 269 // Convert from the FGInterface struct to the JSBsim generic_ struct
 270
 271 bool FGJSBsim::copy_to_JSBsim() {
 272     // copy control positions into the JSBsim structure
 273
 274     FCS->SetDaCmd( globals->get_controls()->get_aileron());
 275     FCS->SetDeCmd( globals->get_controls()->get_elevator());
 276     FCS->SetPitchTrimCmd(globals->get_controls()->get_elevator_trim());
 277     FCS->SetDrCmd( -globals->get_controls()->get_rudder());
 278     FCS->SetDfCmd(  globals->get_controls()->get_flaps() );
 279     FCS->SetDsbCmd( 0.0 ); //speedbrakes
 280     FCS->SetDspCmd( 0.0 ); //spoilers
 281     FCS->SetLBrake( globals->get_controls()->get_brake( 0 ) );
 282     FCS->SetRBrake( globals->get_controls()->get_brake( 1 ) );
 283     FCS->SetCBrake( globals->get_controls()->get_brake( 2 ) );
 284     for (int i = 0; i < get_num_engines(); i++) {
 285       FCS->SetThrottleCmd(i, globals->get_controls()->get_throttle(i));
 286     }
 287
 288     Position->SetSeaLevelRadius( get_Sea_level_radius() );
 289     Position->SetRunwayRadius( scenery.cur_elev*SG_METER_TO_FEET
 290                                + get_Sea_level_radius() );
 291
 292     Atmosphere->SetExTemperature(get_Static_temperature());
 293     Atmosphere->SetExPressure(get_Static_pressure());
 294     Atmosphere->SetExDensity(get_Density());
 295     Atmosphere->SetWindNED(get_V_north_airmass(),
 296                            get_V_east_airmass(),
 297                            get_V_down_airmass());
 298 //    SG_LOG(SG_FLIGHT,SG_INFO, "Wind NED: "
 299 //                  << get_V_north_airmass() << ", "
 300 //                  << get_V_east_airmass()  << ", "
 301 //                  << get_V_down_airmass() );
 302
 303     return true;
 304 }
 305
 306 /******************************************************************************/
 307
 308 // Convert from the JSBsim generic_ struct to the FGInterface struct
 309
 310 bool FGJSBsim::copy_from_JSBsim() {
 311     unsigned int i, j;
 312
 313     _set_Inertias( MassBalance->GetMass(),
 314                    MassBalance->GetIxx(),
 315                    MassBalance->GetIyy(),
 316                    MassBalance->GetIzz(),
 317                    MassBalance->GetIxz() );
 318
 319     _set_CG_Position( MassBalance->GetXYZcg(1),
 320                       MassBalance->GetXYZcg(2),
 321                       MassBalance->GetXYZcg(3) );
 322
 323     _set_Accels_Body( Translation->GetUVWdot(1),
 324                       Translation->GetUVWdot(2),
 325                       Translation->GetUVWdot(3) );
 326
 327     _set_Accels_CG_Body( Translation->GetUVWdot(1),
 328                          Translation->GetUVWdot(2),
 329                          Translation->GetUVWdot(3) );
 330
 331     //_set_Accels_CG_Body_N ( Translation->GetNcg(1),
 332     //                       Translation->GetNcg(2),
 333     //                       Translation->GetNcg(3) );
 334     //
 335     _set_Accels_Pilot_Body( Auxiliary->GetPilotAccel(1),
 336                             Auxiliary->GetPilotAccel(2),
 337                             Auxiliary->GetPilotAccel(3) );
 338
 339     //_set_Accels_Pilot_Body_N( Auxiliary->GetNpilot(1),
 340     //                         Auxiliary->GetNpilot(2),
 341     //                         Auxiliary->GetNpilot(3) );
 342
 343     _set_Nlf( Aerodynamics->GetNlf() );
 344
 345     // Velocities
 346
 347     _set_Velocities_Local( Position->GetVn(),
 348                            Position->GetVe(),
 349                            Position->GetVd() );
 350
 351     _set_Velocities_Wind_Body( Translation->GetUVW(1),
 352                                Translation->GetUVW(2),
 353                                Translation->GetUVW(3) );
 354
 355     _set_V_rel_wind( Translation->GetVt() );
 356
 357     _set_V_equiv_kts( Auxiliary->GetVequivalentKTS() );
 358
 359     // _set_V_calibrated( Auxiliary->GetVcalibratedFPS() );
 360
 361     _set_V_calibrated_kts( Auxiliary->GetVcalibratedKTS() );
 362
 363     _set_V_ground_speed( Position->GetVground() );
 364
 365     _set_Omega_Body( Rotation->GetPQR(1),
 366                      Rotation->GetPQR(2),
 367                      Rotation->GetPQR(3) );
 368
 369     _set_Euler_Rates( Rotation->GetEulerRates(1),
 370                       Rotation->GetEulerRates(2),
 371                       Rotation->GetEulerRates(3) );
 372
 373     _set_Geocentric_Rates(Position->GetLatitudeDot(),
 374                           Position->GetLongitudeDot(),
 375                           Position->Gethdot() );
 376
 377     _set_Mach_number( Translation->GetMach() );
 378
 379     // Positions
 380     _updatePosition( Position->GetLatitude(),
 381                      Position->GetLongitude(),
 382                      Position->Geth() );
 383
 384     _set_Altitude_AGL( Position->GetDistanceAGL() );
 385
 386     _set_Euler_Angles( Rotation->Getphi(),
 387                        Rotation->Gettht(),
 388                        Rotation->Getpsi() );
 389
 390     _set_Alpha( Translation->Getalpha() );
 391     _set_Beta( Translation->Getbeta() );
 392
 393
 394     _set_Gamma_vert_rad( Position->GetGamma() );
 395     // set_Gamma_horiz_rad( Gamma_horiz_rad );
 396
 397     _set_Earth_position_angle( Auxiliary->GetEarthPositionAngle() );
 398
 399     _set_Climb_Rate( Position->Gethdot() );
 400
 401
 402     for ( i = 1; i <= 3; i++ ) {
 403         for ( j = 1; j <= 3; j++ ) {
 404             _set_T_Local_to_Body( i, j, State->GetTl2b(i,j) );
 405         }
 406     }
 407     return true;
 408 }
 409
 410 void FGJSBsim::snap_shot(void) {
 411     fgic->SetLatitudeRadIC(get_Lat_geocentric() );
 412     fgic->SetLongitudeRadIC( get_Longitude() );
 413     fgic->SetAltitudeFtIC( get_Altitude() );
 414     fgic->SetTerrainAltitudeFtIC( get_Runway_altitude() );
 415     fgic->SetVtrueFpsIC( get_V_rel_wind() );
 416     fgic->SetPitchAngleRadIC( get_Theta() );
 417     fgic->SetRollAngleRadIC( get_Phi() );
 418     fgic->SetTrueHeadingRadIC( get_Psi() );
 419     fgic->SetClimbRateFpsIC( get_Climb_Rate() );
 420 }
 421
 422
 423 bool FGJSBsim::ToggleDataLogging(void) {
 424     return fdmex->GetOutput()->Toggle();
 425 }
 426
 427
 428 bool FGJSBsim::ToggleDataLogging(bool state) {
 429     if (state) {
 430       fdmex->GetOutput()->Enable();
 431       return true;
 432     } else {
 433       fdmex->GetOutput()->Disable();
 434       return false;
 435     }
 436 }
 437
 438
 439 //Positions
 440 void FGJSBsim::set_Latitude(double lat) {
 441     double sea_level_radius_meters,lat_geoc;
 442
 443     SG_LOG(SG_FLIGHT,SG_INFO,"FGJSBsim::set_Latitude: " << lat );
 444
 445     snap_shot();
 446     sgGeodToGeoc( lat, get_Altitude() , &sea_level_radius_meters, &lat_geoc);
 447     _set_Sea_level_radius( sea_level_radius_meters * SG_METER_TO_FEET  );
 448     fgic->SetSeaLevelRadiusFtIC( sea_level_radius_meters * SG_METER_TO_FEET  );
 449     fgic->SetLatitudeRadIC( lat_geoc );
 450     fdmex->RunIC(fgic); //loop JSBSim once
 451     copy_from_JSBsim(); //update the bus
 452     needTrim=true;
 453 }
 454
 455 void FGJSBsim::set_Longitude(double lon) {
 456
 457     SG_LOG(SG_FLIGHT,SG_INFO,"FGJSBsim::set_Longitude: " << lon );
 458
 459     snap_shot();
 460     fgic->SetLongitudeRadIC(lon);
 461     fdmex->RunIC(fgic); //loop JSBSim once
 462     copy_from_JSBsim(); //update the bus
 463     needTrim=true;
 464 }
 465
 466 void FGJSBsim::set_Altitude(double alt) {
 467     double sea_level_radius_meters,lat_geoc;
 468
 469     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Altitude: " << alt );
 470
 471     snap_shot();
 472     sgGeodToGeoc( get_Latitude(), alt , &sea_level_radius_meters, &lat_geoc);
 473     _set_Sea_level_radius( sea_level_radius_meters * SG_METER_TO_FEET  );
 474     fgic->SetSeaLevelRadiusFtIC( sea_level_radius_meters * SG_METER_TO_FEET );
 475     fgic->SetLatitudeRadIC( lat_geoc );
 476     fgic->SetAltitudeFtIC(alt);
 477     fdmex->RunIC(fgic); //loop JSBSim once
 478     copy_from_JSBsim(); //update the bus
 479     needTrim=true;
 480 }
 481
 482 void FGJSBsim::set_V_calibrated_kts(double vc) {
 483     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_V_calibrated_kts: " <<  vc );
 484
 485     snap_shot();
 486     fgic->SetVcalibratedKtsIC(vc);
 487     fdmex->RunIC(fgic); //loop JSBSim once
 488     copy_from_JSBsim(); //update the bus
 489     needTrim=true;
 490 }
 491
 492 void FGJSBsim::set_Mach_number(double mach) {
 493     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Mach_number: " <<  mach );
 494
 495     snap_shot();
 496     fgic->SetMachIC(mach);
 497     fdmex->RunIC(fgic); //loop JSBSim once
 498     copy_from_JSBsim(); //update the bus
 499     needTrim=true;
 500 }
 501
 502 void FGJSBsim::set_Velocities_Local( double north, double east, double down ){
 503     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Velocities_Local: "
 504        << north << ", " <<  east << ", " << down );
 505
 506     snap_shot();
 507     fgic->SetVnorthFpsIC(north);
 508     fgic->SetVeastFpsIC(east);
 509     fgic->SetVdownFpsIC(down);
 510     fdmex->RunIC(fgic); //loop JSBSim once
 511     copy_from_JSBsim(); //update the bus
 512     needTrim=true;
 513 }
 514
 515 void FGJSBsim::set_Velocities_Wind_Body( double u, double v, double w){
 516     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Velocities_Wind_Body: "
 517        << u << ", " <<  v << ", " <<  w );
 518
 519     snap_shot();
 520     fgic->SetUBodyFpsIC(u);
 521     fgic->SetVBodyFpsIC(v);
 522     fgic->SetWBodyFpsIC(w);
 523     fdmex->RunIC(fgic); //loop JSBSim once
 524     copy_from_JSBsim(); //update the bus
 525     needTrim=true;
 526 }
 527
 528 //Euler angles
 529 void FGJSBsim::set_Euler_Angles( double phi, double theta, double psi ) {
 530     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Euler_Angles: "
 531        << phi << ", " << theta << ", " << psi );
 532
 533     snap_shot();
 534     fgic->SetPitchAngleRadIC(theta);
 535     fgic->SetRollAngleRadIC(phi);
 536     fgic->SetTrueHeadingRadIC(psi);
 537     fdmex->RunIC(fgic); //loop JSBSim once
 538     copy_from_JSBsim(); //update the bus
 539     needTrim=true;
 540 }
 541
 542 //Flight Path
 543 void FGJSBsim::set_Climb_Rate( double roc) {
 544     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Climb_Rate: " << roc );
 545
 546     snap_shot();
 547     fgic->SetClimbRateFpsIC(roc);
 548     fdmex->RunIC(fgic); //loop JSBSim once
 549     copy_from_JSBsim(); //update the bus
 550     needTrim=true;
 551 }
 552
 553 void FGJSBsim::set_Gamma_vert_rad( double gamma) {
 554     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Gamma_vert_rad: " << gamma );
 555
 556     snap_shot();
 557     fgic->SetFlightPathAngleRadIC(gamma);
 558     fdmex->RunIC(fgic); //loop JSBSim once
 559     copy_from_JSBsim(); //update the bus
 560     needTrim=true;
 561 }
 562
 563 //Earth
 564 void FGJSBsim::set_Sea_level_radius(double slr) {
 565     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Sea_level_radius: " << slr );
 566
 567     snap_shot();
 568     fgic->SetSeaLevelRadiusFtIC(slr);
 569     fdmex->RunIC(fgic); //loop JSBSim once
 570     copy_from_JSBsim(); //update the bus
 571     needTrim=true;
 572 }
 573
 574 void FGJSBsim::set_Runway_altitude(double ralt) {
 575     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Runway_altitude: " << ralt );
 576
 577     snap_shot();
 578     _set_Runway_altitude( ralt );
 579     fgic->SetTerrainAltitudeFtIC( ralt );
 580     fdmex->RunIC(fgic); //loop JSBSim once
 581     copy_from_JSBsim(); //update the bus
 582     needTrim=true;
 583 }
 584
 585 void FGJSBsim::set_Static_pressure(double p) {
 586     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Static_pressure: " << p );
 587
 588     snap_shot();
 589     Atmosphere->SetExPressure(p);
 590     if(Atmosphere->External() == true)
 591     needTrim=true;
 592 }
 593
 594 void FGJSBsim::set_Static_temperature(double T) {
 595     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Static_temperature: " << T );
 596
 597     snap_shot();
 598     Atmosphere->SetExTemperature(T);
 599     if(Atmosphere->External() == true)
 600     needTrim=true;
 601 }
 602
 603
 604 void FGJSBsim::set_Density(double rho) {
 605     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Density: " << rho );
 606
 607     snap_shot();
 608     Atmosphere->SetExDensity(rho);
 609     if(Atmosphere->External() == true)
 610     needTrim=true;
 611 }
 612
 613
 614 void FGJSBsim::set_Velocities_Local_Airmass (double wnorth,
 615                          double weast,
 616                          double wdown ) {
 617     SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Velocities_Local_Airmass: "
 618        << wnorth << ", " << weast << ", " << wdown );
 619
 620     _set_Velocities_Local_Airmass( wnorth, weast, wdown );
 621     snap_shot();
 622     Atmosphere->SetWindNED(wnorth, weast, wdown );
 623     if(Atmosphere->External() == true)
 624         needTrim=true;
 625 }
 626