1 // JSBsim.cxx -- interface to the JSBsim flight model
3 // Written by Curtis Olson, started February 1999.
5 // Copyright (C) 1999 Curtis L. Olson - curt@flightgear.org
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.
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.
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.
24 #include <simgear/compiler.h>
26 #ifdef SG_MATH_EXCEPTION_CLASH
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>
37 #include <FDM/flight.hxx>
39 #include <Aircraft/aircraft.hxx>
40 #include <Controls/controls.hxx>
41 #include <Main/globals.hxx>
42 #include <Main/fg_props.hxx>
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/FGInitialCondition.h>
53 #include <FDM/JSBSim/FGTrim.h>
54 #include <FDM/JSBSim/FGAtmosphere.h>
55 #include <FDM/JSBSim/FGMassBalance.h>
56 #include <FDM/JSBSim/FGAerodynamics.h>
57 #include <FDM/JSBSim/FGLGear.h>
58 #include <FDM/JSBSim/FGPropertyManager.h>
62 FMAX (double a, double b)
68 /******************************************************************************/
70 FGJSBsim::FGJSBsim( double dt )
75 fdmex = new FGFDMExec( (FGPropertyManager*)globals->get_props() );
77 State = fdmex->GetState();
78 Atmosphere = fdmex->GetAtmosphere();
79 FCS = fdmex->GetFCS();
80 MassBalance = fdmex->GetMassBalance();
81 Propulsion = fdmex->GetPropulsion();
82 Aircraft = fdmex->GetAircraft();
83 Translation = fdmex->GetTranslation();
84 Rotation = fdmex->GetRotation();
85 Position = fdmex->GetPosition();
86 Auxiliary = fdmex->GetAuxiliary();
87 Aerodynamics = fdmex->GetAerodynamics();
88 GroundReactions = fdmex->GetGroundReactions();
93 SGPath aircraft_path( globals->get_fg_root() );
94 aircraft_path.append( "Aircraft" );
96 SGPath engine_path( globals->get_fg_root() );
97 engine_path.append( "Engine" );
100 result = fdmex->LoadModel( aircraft_path.str(),
102 fgGetString("/sim/aero") );
105 SG_LOG( SG_FLIGHT, SG_INFO, " loaded aero.");
107 SG_LOG( SG_FLIGHT, SG_INFO,
108 " aero does not exist (you may have mis-typed the name).");
112 SG_LOG( SG_FLIGHT, SG_INFO, "" );
113 SG_LOG( SG_FLIGHT, SG_INFO, "" );
114 SG_LOG( SG_FLIGHT, SG_INFO, "After loading aero definition file ..." );
116 int Neng = Propulsion->GetNumEngines();
117 SG_LOG( SG_FLIGHT, SG_INFO, "num engines = " << Neng );
119 if ( GroundReactions->GetNumGearUnits() <= 0 ) {
120 SG_LOG( SG_FLIGHT, SG_ALERT, "num gear units = "
121 << GroundReactions->GetNumGearUnits() );
122 SG_LOG( SG_FLIGHT, SG_ALERT, "This is a very bad thing because with 0 gear units, the ground trimming");
123 SG_LOG( SG_FLIGHT, SG_ALERT, "routine (coming up later in the code) will core dump.");
124 SG_LOG( SG_FLIGHT, SG_ALERT, "Halting the sim now, and hoping a solution will present itself soon!");
131 // Set initial fuel levels if provided.
132 for (unsigned int i = 0; i < Propulsion->GetNumTanks(); i++) {
133 SGPropertyNode * node = fgGetNode("/consumables/fuel/tank", i, true);
134 if (node->getChild("level-gal_us", 0, false) != 0)
135 Propulsion->GetTank(i)
136 ->SetContents(node->getDoubleValue("level-gal_us") * 6.6);
139 fgSetDouble("/fdm/trim/pitch-trim", FCS->GetPitchTrimCmd());
140 fgSetDouble("/fdm/trim/throttle", FCS->GetThrottleCmd(0));
141 fgSetDouble("/fdm/trim/aileron", FCS->GetDaCmd());
142 fgSetDouble("/fdm/trim/rudder", FCS->GetDrCmd());
144 startup_trim = fgGetNode("/sim/presets/trim", true);
146 trimmed = fgGetNode("/fdm/trim/trimmed", true);
147 trimmed->setBoolValue(false);
149 pitch_trim = fgGetNode("/fdm/trim/pitch-trim", true );
150 throttle_trim = fgGetNode("/fdm/trim/throttle", true );
151 aileron_trim = fgGetNode("/fdm/trim/aileron", true );
152 rudder_trim = fgGetNode("/fdm/trim/rudder", true );
155 stall_warning = fgGetNode("/sim/aero/alarms/stall-warning",true);
156 stall_warning->setDoubleValue(0);
159 flap_pos_pct=fgGetNode("/surface-positions/flap-pos-norm",true);
160 elevator_pos_pct=fgGetNode("/surface-positions/elevator-pos-norm",true);
162 =fgGetNode("/surface-positions/left-aileron-pos-norm",true);
163 right_aileron_pos_pct
164 =fgGetNode("/surface-positions/right-aileron-pos-norm",true);
165 rudder_pos_pct=fgGetNode("/surface-positions/rudder-pos-norm",true);
169 elevator_pos_pct->setDoubleValue(0);
170 left_aileron_pos_pct->setDoubleValue(0);
171 right_aileron_pos_pct->setDoubleValue(0);
172 rudder_pos_pct->setDoubleValue(0);
173 flap_pos_pct->setDoubleValue(0);
175 temperature = fgGetNode("/environment/temperature-degc",true);
176 pressure = fgGetNode("/environment/pressure-inhg",true);
177 density = fgGetNode("/environment/density-slugft3",true);
179 wind_from_north= fgGetNode("/environment/wind-from-north-fps",true);
180 wind_from_east = fgGetNode("/environment/wind-from-east-fps" ,true);
181 wind_from_down = fgGetNode("/environment/wind-from-down-fps" ,true);
185 /******************************************************************************/
186 FGJSBsim::~FGJSBsim(void) {
190 /******************************************************************************/
192 // Initialize the JSBsim flight model, dt is the time increment for
193 // each subsequent iteration through the EOM
195 void FGJSBsim::init() {
197 SG_LOG( SG_FLIGHT, SG_INFO, "Starting and initializing JSBsim" );
199 // Explicitly call the superclass's
200 // init method first.
203 Atmosphere->UseInternal();
205 if (fgGetBool("/environment/params/control-fdm-atmosphere")) {
206 Atmosphere->UseExternal();
207 Atmosphere->SetExTemperature(
208 9.0/5.0*(temperature->getDoubleValue()+273.15) );
209 Atmosphere->SetExPressure(pressure->getDoubleValue()*70.726566);
210 Atmosphere->SetExDensity(density->getDoubleValue());
212 Atmosphere->UseInternal();
216 fgic->SetVnorthFpsIC( wind_from_north->getDoubleValue() );
217 fgic->SetVeastFpsIC( wind_from_east->getDoubleValue() );
218 fgic->SetVdownFpsIC( wind_from_down->getDoubleValue() );
220 //Atmosphere->SetExTemperature(get_Static_temperature());
221 //Atmosphere->SetExPressure(get_Static_pressure());
222 //Atmosphere->SetExDensity(get_Density());
223 SG_LOG(SG_FLIGHT,SG_INFO,"T,p,rho: " << fdmex->GetAtmosphere()->GetTemperature()
224 << ", " << fdmex->GetAtmosphere()->GetPressure()
225 << ", " << fdmex->GetAtmosphere()->GetDensity() );
231 fdmex->RunIC(); //loop JSBSim once w/o integrating
232 copy_from_JSBsim(); //update the bus
234 SG_LOG( SG_FLIGHT, SG_INFO, " Initialized JSBSim with:" );
236 switch(fgic->GetSpeedSet()) {
238 SG_LOG(SG_FLIGHT,SG_INFO, " Vn,Ve,Vd= "
239 << Position->GetVn() << ", "
240 << Position->GetVe() << ", "
241 << Position->GetVd() << " ft/s");
244 SG_LOG(SG_FLIGHT,SG_INFO, " U,V,W= "
245 << Translation->GetUVW(1) << ", "
246 << Translation->GetUVW(2) << ", "
247 << Translation->GetUVW(3) << " ft/s");
250 SG_LOG(SG_FLIGHT,SG_INFO, " Mach: "
251 << Translation->GetMach() );
255 SG_LOG(SG_FLIGHT,SG_INFO, " Indicated Airspeed: "
256 << Auxiliary->GetVcalibratedKTS() << " knots" );
260 stall_warning->setDoubleValue(0);
262 SG_LOG( SG_FLIGHT, SG_INFO, " Bank Angle: "
263 << Rotation->Getphi()*RADTODEG << " deg" );
264 SG_LOG( SG_FLIGHT, SG_INFO, " Pitch Angle: "
265 << Rotation->Gettht()*RADTODEG << " deg" );
266 SG_LOG( SG_FLIGHT, SG_INFO, " True Heading: "
267 << Rotation->Getpsi()*RADTODEG << " deg" );
268 SG_LOG( SG_FLIGHT, SG_INFO, " Latitude: "
269 << Position->GetLatitude() << " deg" );
270 SG_LOG( SG_FLIGHT, SG_INFO, " Longitude: "
271 << Position->GetLongitude() << " deg" );
272 SG_LOG( SG_FLIGHT, SG_INFO, " Altitude: "
273 << Position->Geth() << " feet" );
274 SG_LOG( SG_FLIGHT, SG_INFO, " loaded initial conditions" );
276 SG_LOG( SG_FLIGHT, SG_INFO, " set dt" );
278 SG_LOG( SG_FLIGHT, SG_INFO, "Finished initializing JSBSim" );
280 SG_LOG( SG_FLIGHT, SG_INFO, "FGControls::get_gear_down()= " <<
281 globals->get_controls()->get_gear_down() );
287 /******************************************************************************/
289 // Run an iteration of the EOM (equations of motion)
292 FGJSBsim::update( double dt ) {
297 int multiloop = _calc_multiloop(dt);
301 // double save_alt = 0.0;
305 trimmed->setBoolValue(false);
308 if ( startup_trim->getBoolValue() ) {
309 SG_LOG(SG_FLIGHT, SG_INFO,
310 "Ready to trim, terrain altitude is: "
311 << cur_fdm_state->get_Runway_altitude() * SG_METER_TO_FEET );
312 fgic->SetTerrainAltitudeFtIC( cur_fdm_state->get_ground_elev_ft() );
315 fdmex->RunIC(); //apply any changes made through the set_ functions
320 for ( i=0; i < multiloop; i++ ) {
324 FGJSBBase::Message* msg;
325 while (fdmex->ReadMessage()) {
326 msg = fdmex->ProcessMessage();
328 case FGJSBBase::Message::eText:
329 SG_LOG( SG_FLIGHT, SG_INFO, msg->messageId << ": " << msg->text );
331 case FGJSBBase::Message::eBool:
332 SG_LOG( SG_FLIGHT, SG_INFO, msg->messageId << ": " << msg->text << " " << msg->bVal );
334 case FGJSBBase::Message::eInteger:
335 SG_LOG( SG_FLIGHT, SG_INFO, msg->messageId << ": " << msg->text << " " << msg->iVal );
337 case FGJSBBase::Message::eDouble:
338 SG_LOG( SG_FLIGHT, SG_INFO, msg->messageId << ": " << msg->text << " " << msg->dVal );
341 SG_LOG( SG_FLIGHT, SG_INFO, "Unrecognized message type." );
346 // translate JSBsim back to FG structure so that the
347 // autopilot (and the rest of the sim can use the updated values
351 /******************************************************************************/
353 // Convert from the FGInterface struct to the JSBsim generic_ struct
355 bool FGJSBsim::copy_to_JSBsim() {
358 // copy control positions into the JSBsim structure
360 FCS->SetDaCmd( globals->get_controls()->get_aileron());
361 FCS->SetRollTrimCmd( globals->get_controls()->get_aileron_trim() );
362 FCS->SetDeCmd( globals->get_controls()->get_elevator());
363 FCS->SetPitchTrimCmd( globals->get_controls()->get_elevator_trim() );
364 FCS->SetDrCmd( -globals->get_controls()->get_rudder() );
365 FCS->SetYawTrimCmd( -globals->get_controls()->get_rudder_trim() );
366 FCS->SetDfCmd( globals->get_controls()->get_flaps() );
367 FCS->SetDsbCmd( 0.0 ); //speedbrakes
368 FCS->SetDspCmd( 0.0 ); //spoilers
370 // Parking brake sets minimum braking
372 double parking_brake = globals->get_controls()->get_parking_brake();
373 FCS->SetLBrake(FMAX(globals->get_controls()->get_brake(0), parking_brake));
374 FCS->SetRBrake(FMAX(globals->get_controls()->get_brake(1), parking_brake));
375 FCS->SetCBrake( globals->get_controls()->get_brake( 2 ) );
377 FCS->SetGearCmd( globals->get_controls()->get_gear_down());
378 for (i = 0; i < Propulsion->GetNumEngines(); i++) {
379 FGEngine * eng = Propulsion->GetEngine(i);
380 SGPropertyNode * node = fgGetNode("engines/engine", i, true);
381 FCS->SetThrottleCmd(i, globals->get_controls()->get_throttle(i));
382 FCS->SetMixtureCmd(i, globals->get_controls()->get_mixture(i));
383 FCS->SetPropAdvanceCmd(i, globals->get_controls()->get_prop_advance(i));
384 Propulsion->GetThruster(i)->SetRPM(node->getDoubleValue("rpm"));
385 eng->SetMagnetos( globals->get_controls()->get_magnetos(i) );
386 eng->SetStarter( globals->get_controls()->get_starter(i) );
389 _set_Runway_altitude( cur_fdm_state->get_Runway_altitude() );
390 Position->SetSeaLevelRadius( get_Sea_level_radius() );
391 Position->SetRunwayRadius( get_Runway_altitude()
392 + get_Sea_level_radius() );
394 Atmosphere->SetExTemperature(
395 9.0/5.0*(temperature->getDoubleValue()+273.15) );
396 Atmosphere->SetExPressure(pressure->getDoubleValue()*70.726566);
397 Atmosphere->SetExDensity(density->getDoubleValue());
399 Atmosphere->SetWindNED( wind_from_north->getDoubleValue(),
400 wind_from_east->getDoubleValue(),
401 wind_from_down->getDoubleValue() );
402 // SG_LOG(SG_FLIGHT,SG_INFO, "Wind NED: "
403 // << get_V_north_airmass() << ", "
404 // << get_V_east_airmass() << ", "
405 // << get_V_down_airmass() );
407 for (i = 0; i < Propulsion->GetNumTanks(); i++) {
408 SGPropertyNode * node = fgGetNode("/consumables/fuel/tank", i, true);
409 FGTank * tank = Propulsion->GetTank(i);
410 tank->SetContents(node->getDoubleValue("level-gal_us") * 6.6);
411 // tank->SetContents(node->getDoubleValue("level-lb"));
417 /******************************************************************************/
419 // Convert from the JSBsim generic_ struct to the FGInterface struct
421 bool FGJSBsim::copy_from_JSBsim() {
424 _set_Inertias( MassBalance->GetMass(),
425 MassBalance->GetIxx(),
426 MassBalance->GetIyy(),
427 MassBalance->GetIzz(),
428 MassBalance->GetIxz() );
430 _set_CG_Position( MassBalance->GetXYZcg(1),
431 MassBalance->GetXYZcg(2),
432 MassBalance->GetXYZcg(3) );
434 _set_Accels_Body( Aircraft->GetBodyAccel()(1),
435 Aircraft->GetBodyAccel()(2),
436 Aircraft->GetBodyAccel()(3) );
438 //_set_Accels_CG_Body( Aircraft->GetBodyAccel()(1),
439 // Aircraft->GetBodyAccel()(2),
440 // Aircraft->GetBodyAccel()(3) );
442 _set_Accels_CG_Body_N ( Aircraft->GetNcg()(1),
443 Aircraft->GetNcg()(2),
444 Aircraft->GetNcg()(3) );
446 _set_Accels_Pilot_Body( Auxiliary->GetPilotAccel()(1),
447 Auxiliary->GetPilotAccel()(2),
448 Auxiliary->GetPilotAccel()(3) );
450 // _set_Accels_Pilot_Body_N( Auxiliary->GetPilotAccel()(1)/32.1739,
451 // Auxiliary->GetNpilot(2)/32.1739,
452 // Auxiliary->GetNpilot(3)/32.1739 );
454 _set_Nlf( Aircraft->GetNlf() );
458 _set_Velocities_Local( Position->GetVn(),
462 _set_Velocities_Wind_Body( Translation->GetUVW(1),
463 Translation->GetUVW(2),
464 Translation->GetUVW(3) );
466 _set_V_rel_wind( Translation->GetVt() );
468 _set_V_equiv_kts( Auxiliary->GetVequivalentKTS() );
470 // _set_V_calibrated( Auxiliary->GetVcalibratedFPS() );
472 _set_V_calibrated_kts( Auxiliary->GetVcalibratedKTS() );
474 _set_V_ground_speed( Position->GetVground() );
476 _set_Omega_Body( Rotation->GetPQR(1),
478 Rotation->GetPQR(3) );
480 _set_Euler_Rates( Rotation->GetEulerRates(1),
481 Rotation->GetEulerRates(2),
482 Rotation->GetEulerRates(3) );
484 _set_Geocentric_Rates(Position->GetLatitudeDot(),
485 Position->GetLongitudeDot(),
486 Position->Gethdot() );
488 _set_Mach_number( Translation->GetMach() );
491 _updateGeocentricPosition( Position->GetLatitude(),
492 Position->GetLongitude(),
495 _set_Altitude_AGL( Position->GetDistanceAGL() );
497 _set_Euler_Angles( Rotation->Getphi(),
499 Rotation->Getpsi() );
501 _set_Alpha( Translation->Getalpha() );
502 _set_Beta( Translation->Getbeta() );
505 _set_Gamma_vert_rad( Position->GetGamma() );
506 // set_Gamma_horiz_rad( Gamma_horiz_rad );
508 _set_Earth_position_angle( Auxiliary->GetEarthPositionAngle() );
510 _set_Climb_Rate( Position->Gethdot() );
513 for ( i = 1; i <= 3; i++ ) {
514 for ( j = 1; j <= 3; j++ ) {
515 _set_T_Local_to_Body( i, j, State->GetTl2b(i,j) );
519 // Copy the engine values from JSBSim.
520 for( i=0; i < Propulsion->GetNumEngines(); i++ ) {
521 SGPropertyNode * node = fgGetNode("engines/engine", i, true);
522 FGEngine * eng = Propulsion->GetEngine(i);
523 FGThruster * thrust = Propulsion->GetThruster(i);
525 node->setDoubleValue("mp-osi", eng->getManifoldPressure_inHg());
526 node->setDoubleValue("rpm", thrust->GetRPM());
527 node->setDoubleValue("egt-degf", eng->getExhaustGasTemp_degF());
528 node->setDoubleValue("fuel-flow-gph", eng->getFuelFlow_gph());
529 node->setDoubleValue("cht-degf", eng->getCylinderHeadTemp_degF());
530 node->setDoubleValue("oil-temperature-degf", eng->getOilTemp_degF());
531 node->setDoubleValue("oil-pressure-psi", eng->getOilPressure_psi());
532 node->setBoolValue("running", eng->GetRunning());
533 node->setBoolValue("cranking", eng->GetCranking());
536 static const SGPropertyNode *fuel_freeze
537 = fgGetNode("/sim/freeze/fuel");
539 // Copy the fuel levels from JSBSim if fuel
540 // freeze not enabled.
541 if ( ! fuel_freeze->getBoolValue() ) {
542 for (i = 0; i < Propulsion->GetNumTanks(); i++) {
543 SGPropertyNode * node
544 = fgGetNode("/consumables/fuel/tank", i, true);
545 double contents = Propulsion->GetTank(i)->GetContents();
546 node->setDoubleValue("level-gal_us", contents/6.6);
547 // node->setDoubleValue("level-lb", contents);
553 stall_warning->setDoubleValue( Aerodynamics->GetStallWarn() );
555 /* elevator_pos_deg->setDoubleValue( FCS->GetDePos()*SG_RADIANS_TO_DEGREES );
556 left_aileron_pos_deg->setDoubleValue( FCS->GetDaLPos()*SG_RADIANS_TO_DEGREES );
557 right_aileron_pos_deg->setDoubleValue( FCS->GetDaRPos()*SG_RADIANS_TO_DEGREES );
558 rudder_pos_deg->setDoubleValue( -1*FCS->GetDrPos()*SG_RADIANS_TO_DEGREES );
559 flap_pos_deg->setDoubleValue( FCS->GetDfPos() ); */
562 elevator_pos_pct->setDoubleValue( FCS->GetDePos(ofNorm) );
563 left_aileron_pos_pct->setDoubleValue( FCS->GetDaLPos(ofNorm) );
564 right_aileron_pos_pct->setDoubleValue( -1*FCS->GetDaLPos(ofNorm) );
565 rudder_pos_pct->setDoubleValue( -1*FCS->GetDrPos(ofNorm) );
566 flap_pos_pct->setDoubleValue( FCS->GetDfPos(ofNorm) );
572 bool FGJSBsim::ToggleDataLogging(void) {
573 return fdmex->GetOutput()->Toggle();
577 bool FGJSBsim::ToggleDataLogging(bool state) {
579 fdmex->GetOutput()->Enable();
582 fdmex->GetOutput()->Disable();
589 void FGJSBsim::set_Latitude(double lat) {
590 static const SGPropertyNode *altitude = fgGetNode("/position/altitude-ft");
592 double sea_level_radius_meters, lat_geoc;
594 if ( altitude->getDoubleValue() > -9990 ) {
595 alt = altitude->getDoubleValue();
601 SG_LOG(SG_FLIGHT,SG_INFO,"FGJSBsim::set_Latitude: " << lat );
602 SG_LOG(SG_FLIGHT,SG_INFO," cur alt (ft) = " << alt );
604 sgGeodToGeoc( lat, alt * SG_FEET_TO_METER,
605 &sea_level_radius_meters, &lat_geoc );
606 _set_Sea_level_radius( sea_level_radius_meters * SG_METER_TO_FEET );
607 fgic->SetSeaLevelRadiusFtIC( sea_level_radius_meters * SG_METER_TO_FEET );
608 _set_Runway_altitude( cur_fdm_state->get_Runway_altitude() );
609 fgic->SetTerrainAltitudeFtIC( cur_fdm_state->get_ground_elev_ft() );
610 fgic->SetLatitudeRadIC( lat_geoc );
614 void FGJSBsim::set_Longitude(double lon) {
616 SG_LOG(SG_FLIGHT,SG_INFO,"FGJSBsim::set_Longitude: " << lon );
618 fgic->SetLongitudeRadIC( lon );
619 _set_Runway_altitude( cur_fdm_state->get_Runway_altitude() );
620 fgic->SetTerrainAltitudeFtIC( cur_fdm_state->get_ground_elev_ft() );
624 void FGJSBsim::set_Altitude(double alt) {
625 static const SGPropertyNode *latitude = fgGetNode("/position/latitude-deg");
627 double sea_level_radius_meters,lat_geoc;
629 SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Altitude: " << alt );
630 SG_LOG(SG_FLIGHT,SG_INFO, " lat (deg) = " << latitude->getDoubleValue() );
633 sgGeodToGeoc( latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS, alt,
634 &sea_level_radius_meters, &lat_geoc);
635 _set_Sea_level_radius( sea_level_radius_meters * SG_METER_TO_FEET );
636 fgic->SetSeaLevelRadiusFtIC( sea_level_radius_meters * SG_METER_TO_FEET );
637 _set_Runway_altitude( cur_fdm_state->get_Runway_altitude() );
638 fgic->SetTerrainAltitudeFtIC( cur_fdm_state->get_ground_elev_ft() );
639 SG_LOG(SG_FLIGHT, SG_INFO,
640 "Terrain altitude: " << cur_fdm_state->get_Runway_altitude() * SG_METER_TO_FEET );
641 fgic->SetLatitudeRadIC( lat_geoc );
642 fgic->SetAltitudeFtIC(alt);
646 void FGJSBsim::set_V_calibrated_kts(double vc) {
647 SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_V_calibrated_kts: " << vc );
650 fgic->SetVcalibratedKtsIC(vc);
654 void FGJSBsim::set_Mach_number(double mach) {
655 SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Mach_number: " << mach );
658 fgic->SetMachIC(mach);
662 void FGJSBsim::set_Velocities_Local( double north, double east, double down ){
663 SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Velocities_Local: "
664 << north << ", " << east << ", " << down );
667 fgic->SetVnorthFpsIC(north);
668 fgic->SetVeastFpsIC(east);
669 fgic->SetVdownFpsIC(down);
673 void FGJSBsim::set_Velocities_Wind_Body( double u, double v, double w){
674 SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Velocities_Wind_Body: "
675 << u << ", " << v << ", " << w );
678 fgic->SetUBodyFpsIC(u);
679 fgic->SetVBodyFpsIC(v);
680 fgic->SetWBodyFpsIC(w);
685 void FGJSBsim::set_Euler_Angles( double phi, double theta, double psi ) {
686 SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Euler_Angles: "
687 << phi << ", " << theta << ", " << psi );
690 fgic->SetPitchAngleRadIC(theta);
691 fgic->SetRollAngleRadIC(phi);
692 fgic->SetTrueHeadingRadIC(psi);
697 void FGJSBsim::set_Climb_Rate( double roc) {
698 SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Climb_Rate: " << roc );
701 //since both climb rate and flight path angle are set in the FG
702 //startup sequence, something is needed to keep one from cancelling
704 if( !(fabs(roc) > 1 && fabs(fgic->GetFlightPathAngleRadIC()) < 0.01) ) {
705 fgic->SetClimbRateFpsIC(roc);
710 void FGJSBsim::set_Gamma_vert_rad( double gamma) {
711 SG_LOG(SG_FLIGHT,SG_INFO, "FGJSBsim::set_Gamma_vert_rad: " << gamma );
714 if( !(fabs(gamma) < 0.01 && fabs(fgic->GetClimbRateFpsIC()) > 1) ) {
715 fgic->SetFlightPathAngleRadIC(gamma);
720 void FGJSBsim::init_gear(void ) {
722 FGGroundReactions* gr=fdmex->GetGroundReactions();
723 int Ngear=GroundReactions->GetNumGearUnits();
724 for (int i=0;i<Ngear;i++) {
725 SGPropertyNode * node = fgGetNode("gear/gear", i, true);
726 node->setDoubleValue("xoffset-in",
727 gr->GetGearUnit(i)->GetBodyLocation()(1));
728 node->setDoubleValue("yoffset-in",
729 gr->GetGearUnit(i)->GetBodyLocation()(2));
730 node->setDoubleValue("zoffset-in",
731 gr->GetGearUnit(i)->GetBodyLocation()(3));
732 node->setBoolValue("wow", gr->GetGearUnit(i)->GetWOW());
733 node->setBoolValue("has-brake", gr->GetGearUnit(i)->GetBrakeGroup() > 0);
734 node->setDoubleValue("position-norm", FCS->GetGearPos());
738 void FGJSBsim::update_gear(void) {
740 FGGroundReactions* gr=fdmex->GetGroundReactions();
741 int Ngear=GroundReactions->GetNumGearUnits();
742 for (int i=0;i<Ngear;i++) {
743 SGPropertyNode * node = fgGetNode("gear/gear", i, true);
744 node->getChild("wow", 0, true)
745 ->setBoolValue(gr->GetGearUnit(i)->GetWOW());
746 node->getChild("position-norm", 0, true)
747 ->setDoubleValue(FCS->GetGearPos());
751 void FGJSBsim::do_trim(void) {
754 if( fgGetBool("/sim/presets/onground") ) {
755 fgic->SetVcalibratedKtsIC(0.0);
756 fgtrim=new FGTrim(fdmex,tGround);
758 fgtrim=new FGTrim(fdmex,tLongitudinal);
760 if( !fgtrim->DoTrim() ) {
764 trimmed->setBoolValue(true);
766 State->ReportState();
768 pitch_trim->setDoubleValue( FCS->GetPitchTrimCmd() );
769 throttle_trim->setDoubleValue( FCS->GetThrottleCmd(0) );
770 aileron_trim->setDoubleValue( FCS->GetDaCmd() );
771 rudder_trim->setDoubleValue( FCS->GetDrCmd() );
773 globals->get_controls()->set_elevator_trim(FCS->GetPitchTrimCmd());
774 globals->get_controls()->set_elevator(FCS->GetDeCmd());
775 globals->get_controls()->set_throttle(FGControls::ALL_ENGINES,
776 FCS->GetThrottleCmd(0));
778 globals->get_controls()->set_aileron(FCS->GetDaCmd());
779 globals->get_controls()->set_rudder( FCS->GetDrCmd());
781 SG_LOG( SG_FLIGHT, SG_INFO, " Trim complete" );
784 void FGJSBsim::update_ic(void) {
786 fgic->SetLatitudeRadIC(get_Lat_geocentric() );
787 fgic->SetLongitudeRadIC( get_Longitude() );
788 fgic->SetAltitudeFtIC( get_Altitude() );
789 fgic->SetVcalibratedKtsIC( get_V_calibrated_kts() );
790 fgic->SetPitchAngleRadIC( get_Theta() );
791 fgic->SetRollAngleRadIC( get_Phi() );
792 fgic->SetTrueHeadingRadIC( get_Psi() );
793 fgic->SetClimbRateFpsIC( get_Climb_Rate() );