src/FDM/LaRCsim/LaRCsim.cxx

   1 // LaRCsim.cxx -- interface to the LaRCsim flight model
   2 //
   3 // Written by Curtis Olson, started October 1998.
   4 //
   5 // Copyright (C) 1998  Curtis L. Olson  - http://www.flightgear.org/~curt
   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 #include <math.h>
  24 #include <string.h>             // strcmp()
  25
  26 #include <simgear/constants.h>
  27 #include <simgear/debug/logstream.hxx>
  28 #include <simgear/scene/model/location.hxx>
  29 #include <simgear/scene/model/placement.hxx>
  30
  31 #include <Aircraft/aircraft.hxx>
  32 #include <Aircraft/controls.hxx>
  33 #include <FDM/flight.hxx>
  34 #include <FDM/UIUCModel/uiuc_aircraft.h>
  35 #include <Main/fg_props.hxx>
  36 #include <Model/acmodel.hxx>
  37
  38 #include "ls_cockpit.h"
  39 #include "ls_generic.h"
  40 #include "ls_interface.h"
  41 #include "ls_constants.h"
  42
  43 #include "IO360.hxx"
  44 #include "LaRCsimIC.hxx"
  45 #include "LaRCsim.hxx"
  46
  47
  48 FGLaRCsim::FGLaRCsim( double dt ) {
  49 //     set_delta_t( dt );
  50
  51     speed_up = fgGetNode("/sim/speed-up", true);
  52     aero = fgGetNode("/sim/aero", true);
  53     uiuc_type = fgGetNode("/sim/uiuc-type", true);
  54
  55     ls_toplevel_init( 0.0, (char *)(aero->getStringValue()) );
  56
  57     lsic=new LaRCsimIC; //this needs to be brought up after LaRCsim is
  58     if ( !strcmp(aero->getStringValue(), "c172") ) {
  59         copy_to_LaRCsim(); // initialize all of LaRCsim's vars
  60
  61         //this should go away someday -- formerly done in fg_init.cxx
  62         Mass = 8.547270E+01;
  63         I_xx = 1.048000E+03;
  64         I_yy = 3.000000E+03;
  65         I_zz = 3.530000E+03;
  66         I_xz = 0.000000E+00;
  67     }
  68
  69     if ( !strcmp(aero->getStringValue(), "basic") ) {
  70         copy_to_LaRCsim(); // initialize all of LaRCsim's vars
  71
  72         //this should go away someday -- formerly done in fg_init.cxx
  73         Mass = 2./32.174;
  74         I_xx   = 0.0454;
  75         I_yy   = 0.0191;
  76         I_zz   = 0.0721;
  77         I_xz   = 0;
  78 //      Mass = 8.547270E+01;
  79 //      I_xx = 1.048000E+03;
  80 //      I_yy = 3.000000E+03;
  81 //      I_zz = 3.530000E+03;
  82 //      I_xz = 0.000000E+00;
  83     }
  84
  85     ls_set_model_dt(dt);
  86
  87     // Initialize our little engine that hopefully might
  88     eng.init(dt);
  89     // dcl - in passing dt to init rather than update I am assuming
  90     // that the LaRCsim dt is fixed at one value (yes it is 120hz CLO)
  91 }
  92
  93 FGLaRCsim::~FGLaRCsim(void) {
  94     if ( lsic != NULL ) {
  95         delete lsic;
  96         lsic = NULL;
  97     }
  98 }
  99
 100 // Initialize the LaRCsim flight model, dt is the time increment for
 101 // each subsequent iteration through the EOM
 102 void FGLaRCsim::init() {
 103    //do init common to all FDM's
 104    common_init();
 105 }
 106
 107
 108 // Run an iteration of the EOM (equations of motion)
 109 void FGLaRCsim::update( double dt ) {
 110
 111     if (is_suspended())
 112       return;
 113
 114     int multiloop = _calc_multiloop(dt);
 115
 116     // if flying c172-larcsim, do the following
 117     if ( !strcmp(aero->getStringValue(), "c172") ) {
 118         // set control inputs
 119         // cout << "V_calibrated_kts = " << V_calibrated_kts << '\n';
 120         eng.set_IAS( V_calibrated_kts );
 121         eng.set_Throttle_Lever_Pos( globals->get_controls()->get_throttle( 0 )
 122                                     * 100.0 );
 123         eng.set_Propeller_Lever_Pos( 100 );
 124         eng.set_Mixture_Lever_Pos( globals->get_controls()->get_mixture( 0 )
 125                                    * 100.0 );
 126         eng.set_Magneto_Switch_Pos( globals->get_controls()->get_magnetos(0) );
 127         eng.setStarterFlag( globals->get_controls()->get_starter(0) );
 128         eng.set_p_amb( Static_pressure );
 129         eng.set_T_amb( Static_temperature );
 130
 131         // update engine model
 132         eng.update();
 133
 134         // Fake control-surface positions
 135         fgSetDouble("/surface-positions/flap-pos-norm",
 136                     fgGetDouble("/controls/flight/flaps"));
 137                                 // FIXME: ignoring trim
 138         fgSetDouble("/surface-positions/elevator-pos-norm",
 139                     fgGetDouble("/controls/flight/elevator"));
 140                                 // FIXME: ignoring trim
 141         fgSetDouble("/surface-positions/left-aileron-pos-norm",
 142                     fgGetDouble("/controls/flight/aileron"));
 143                                 // FIXME: ignoring trim
 144         fgSetDouble("/surface-positions/right-aileron-pos-norm",
 145                     -1 * fgGetDouble("/controls/flight/aileron"));
 146                                 // FIXME: ignoring trim
 147         fgSetDouble("/surface-positions/rudder-pos-norm",
 148                     fgGetDouble("/controls/flight/rudder"));
 149
 150         // copy engine state values onto "bus"
 151         fgSetDouble("/engines/engine/rpm", eng.get_RPM());
 152         fgSetDouble("/engines/engine/mp-osi", eng.get_Manifold_Pressure());
 153         fgSetDouble("/engines/engine/max-hp", eng.get_MaxHP());
 154         fgSetDouble("/engines/engine/power-pct", eng.get_Percentage_Power());
 155         fgSetDouble("/engines/engine/egt-degf", eng.get_EGT());
 156         fgSetDouble("/engines/engine/cht-degf", eng.get_CHT());
 157         fgSetDouble("/engines/engine/prop-thrust", eng.get_prop_thrust_SI());
 158         fgSetDouble("/engines/engine/fuel-flow-gph",
 159                     eng.get_fuel_flow_gals_hr());
 160         fgSetDouble("/engines/engine/oil-temperature-degf",
 161                     eng.get_oil_temp());
 162         fgSetDouble("/engines/engine/running", eng.getRunningFlag());
 163         fgSetDouble("/engines/engine/cranking", eng.getCrankingFlag());
 164
 165         static const SGPropertyNode *fuel_freeze
 166             = fgGetNode("/sim/freeze/fuel");
 167
 168         if ( ! fuel_freeze->getBoolValue() ) {
 169             //Assume we are using both tanks equally for now
 170             fgSetDouble("/consumables/fuel/tank[0]/level-gal_us",
 171                         fgGetDouble("/consumables/fuel/tank[0]/level-gal_us")
 172                         - (eng.get_fuel_flow_gals_hr() / (2 * 3600))
 173                         * dt);
 174             fgSetDouble("/consumables/fuel/tank[1]/level-gal_us",
 175                         fgGetDouble("/consumables/fuel/tank[1]/level-gal_us")
 176                         - (eng.get_fuel_flow_gals_hr() / (2 * 3600))
 177                         * dt);
 178         }
 179
 180         // Apparently the IO360 thrust model is not working.
 181         // F_X_engine is zero here.
 182         F_X_engine = eng.get_prop_thrust_lbs();
 183
 184         Flap_handle = 30.0 * globals->get_controls()->get_flaps();
 185     }
 186     // done with c172-larcsim if-block
 187
 188     if ( !strcmp(aero->getStringValue(), "basic") ) {
 189         // set control inputs
 190         // cout << "V_calibrated_kts = " << V_calibrated_kts << '\n';
 191         eng.set_IAS( V_calibrated_kts );
 192         eng.set_Throttle_Lever_Pos( globals->get_controls()->get_throttle( 0 )
 193                                     * 100.0 );
 194         eng.set_Propeller_Lever_Pos( 100 );
 195         eng.set_Mixture_Lever_Pos( globals->get_controls()->get_mixture( 0 )
 196                                    * 100.0 );
 197         eng.set_Magneto_Switch_Pos( globals->get_controls()->get_magnetos(0) );
 198         eng.setStarterFlag( globals->get_controls()->get_starter(0) );
 199         eng.set_p_amb( Static_pressure );
 200         eng.set_T_amb( Static_temperature );
 201
 202         // update engine model
 203         eng.update();
 204
 205         // Fake control-surface positions
 206         fgSetDouble("/surface-positions/flap-pos-norm",
 207                     fgGetDouble("/controls/flight/flaps"));
 208                                 // FIXME: ignoring trim
 209         fgSetDouble("/surface-positions/elevator-pos-norm",
 210                     fgGetDouble("/controls/flight/elevator"));
 211                                 // FIXME: ignoring trim
 212         fgSetDouble("/surface-positions/left-aileron-pos-norm",
 213                     fgGetDouble("/controls/flight/aileron"));
 214                                 // FIXME: ignoring trim
 215         fgSetDouble("/surface-positions/right-aileron-pos-norm",
 216                     -1 * fgGetDouble("/controls/flight/aileron"));
 217                                 // FIXME: ignoring trim
 218         fgSetDouble("/surface-positions/rudder-pos-norm",
 219                     fgGetDouble("/controls/flight/rudder"));
 220
 221         // copy engine state values onto "bus"
 222         fgSetDouble("/engines/engine/rpm", eng.get_RPM());
 223         fgSetDouble("/engines/engine/mp-osi", eng.get_Manifold_Pressure());
 224         fgSetDouble("/engines/engine/max-hp", eng.get_MaxHP());
 225         fgSetDouble("/engines/engine/power-pct", eng.get_Percentage_Power());
 226         fgSetDouble("/engines/engine/egt-degf", eng.get_EGT());
 227         fgSetDouble("/engines/engine/cht-degf", eng.get_CHT());
 228         fgSetDouble("/engines/engine/prop-thrust", eng.get_prop_thrust_SI());
 229         fgSetDouble("/engines/engine/fuel-flow-gph",
 230                     eng.get_fuel_flow_gals_hr());
 231         fgSetDouble("/engines/engine/oil-temperature-degf",
 232                     eng.get_oil_temp());
 233         fgSetDouble("/engines/engine/running", eng.getRunningFlag());
 234         fgSetDouble("/engines/engine/cranking", eng.getCrankingFlag());
 235
 236         static const SGPropertyNode *fuel_freeze
 237             = fgGetNode("/sim/freeze/fuel");
 238
 239         if ( ! fuel_freeze->getBoolValue() ) {
 240             //Assume we are using both tanks equally for now
 241             fgSetDouble("/consumables/fuel/tank[0]/level-gal_us",
 242                         fgGetDouble("/consumables/fuel/tank[0]/level-gal_us")
 243                         - (eng.get_fuel_flow_gals_hr() / (2 * 3600))
 244                         * dt);
 245             fgSetDouble("/consumables/fuel/tank[1]/level-gal_us",
 246                         fgGetDouble("/consumables/fuel/tank[1]/level-gal_us")
 247                         - (eng.get_fuel_flow_gals_hr() / (2 * 3600))
 248                         * dt);
 249         }
 250
 251         // Apparently the IO360 thrust model is not working.
 252         // F_X_engine is zero here.
 253         F_X_engine = eng.get_prop_thrust_lbs();
 254
 255         Flap_handle = 30.0 * globals->get_controls()->get_flaps();
 256     }
 257     // done with basic-larcsim if-block
 258
 259     double save_alt = 0.0;
 260
 261     // lets try to avoid really screwing up the LaRCsim model
 262     if ( get_Altitude() < -9000.0 ) {
 263         save_alt = get_Altitude();
 264         set_Altitude( 0.0 );
 265     }
 266
 267     // copy control positions into the LaRCsim structure
 268     Lat_control = globals->get_controls()->get_aileron() / speed_up->getIntValue();
 269     Long_control = globals->get_controls()->get_elevator();
 270     Long_trim = globals->get_controls()->get_elevator_trim();
 271     Rudder_pedal = globals->get_controls()->get_rudder() / speed_up->getIntValue();
 272
 273     // IO360.cxx for the C172 thrust is broken (not sure why).
 274     // So force C172 to use engine model in c172_engine.c instead of the IO360.cxx.
 275     //      if ( !strcmp(aero->getStringValue(), "c172") ) {
 276     //          Use_External_Engine = 1;
 277     //      } else {
 278     //          Use_External_Engine = 0;
 279     //      }
 280     Use_External_Engine = 0;
 281
 282     Throttle_pct = globals->get_controls()->get_throttle( 0 ) * 1.0;
 283
 284     Brake_pct[0] = globals->get_controls()->get_brake_right();
 285     Brake_pct[1] = globals->get_controls()->get_brake_left();
 286
 287     // Inform LaRCsim of the local terrain altitude
 288     Runway_altitude
 289       = get_groundlevel_m(Latitude, Longitude, Altitude * SG_FEET_TO_METER)
 290       * SG_METER_TO_FEET;
 291
 292     // Weather
 293     /* V_north_airmass = get_V_north_airmass();
 294        V_east_airmass =  get_V_east_airmass();
 295        V_down_airmass =  get_V_down_airmass(); */
 296
 297
 298     // old -- FGInterface_2_LaRCsim() not needed except for Init()
 299     // translate FG to LaRCsim structure
 300     // FGInterface_2_LaRCsim(f);
 301     // printf("FG_Altitude = %.2f\n", FG_Altitude * 0.3048);
 302     // printf("Altitude = %.2f\n", Altitude * 0.3048);
 303     // printf("Radius to Vehicle = %.2f\n", Radius_to_vehicle * 0.3048);
 304
 305     // for engine functions (sounds and instruments)
 306     // drive the rpm gauge
 307     fgSetDouble("/engines/engine/rpm", (globals->get_controls()->get_throttle( 0 ) * 100.0 * 25 ));
 308     // manifold air pressure, which drives the sound (see *sound.xml file)
 309     fgSetDouble("/engines/engine/mp-osi", (globals->get_controls()->get_throttle( 0 ) * 100.0 ));
 310     // make the engine cranking and running sounds when fgfs starts up
 311     fgSetDouble("/engines/engine/cranking", 1);
 312     fgSetDouble("/engines/engine/running", 1);
 313
 314     // if flying uiuc, set some properties and over-ride some previous ones
 315     if ( !strcmp(aero->getStringValue(), "uiuc")) {
 316
 317       // surface positions and other general properties
 318       fgSetDouble("/surface-positions/flight/rudder-pos-norm",             fgGetDouble("/controls/flight/rudder"));
 319       fgSetDouble("/surface-positions/flight/elevator-pos-norm",           fgGetDouble("/controls/flight/elevator")); // FIXME: ignoring trim
 320       fgSetDouble("/surface-positions/flight/right-aileron-pos-norm", -1 * fgGetDouble("/controls/flight/aileron")); // FIXME: ignoring trim
 321       fgSetDouble("/surface-positions/flight/left-aileron-pos-norm",       fgGetDouble("/controls/flight/aileron")); // FIXME: ignoring trim
 322
 323       // used by Instruments/accel.xml
 324       fgSetDouble("/accelerations/pilot-g",   -N_Z_cg);
 325
 326       Flap_handle = flap_max * globals->get_controls()->get_flaps();
 327
 328       // flaps with transition occuring in uiuc_aerodeflections.cpp
 329       if (use_flaps) {
 330       fgSetDouble("/surface-positions/flight/flap-pos-norm",               flap_pos_norm);
 331       }
 332
 333       // spoilers with transition occurring in uiuc_aerodeflections.cpp
 334       if(use_spoilers) {
 335         Spoiler_handle = spoiler_max * fgGetDouble("/controls/flight/spoilers");
 336       }
 337       // gear with transition occurring here in LaRCsim.cxx
 338       if (use_gear) {
 339         if(fgGetBool("/controls/gear/gear-down")) {
 340           Gear_handle = 1.0;
 341         }
 342         else {
 343           Gear_handle = 0.;
 344         }
 345         // commanded gear is 0 or 1
 346         gear_cmd_norm = Gear_handle;
 347         // amount gear moves per time step [relative to 1]
 348         gear_increment_per_timestep = gear_rate * dt;
 349         // determine gear position with respect to gear command
 350         if (gear_pos_norm < gear_cmd_norm) {
 351           gear_pos_norm += gear_increment_per_timestep;
 352           if (gear_pos_norm > gear_cmd_norm)
 353             gear_pos_norm = gear_cmd_norm;
 354         } else if (gear_pos_norm > gear_cmd_norm) {
 355           gear_pos_norm -= gear_increment_per_timestep;
 356           if (gear_pos_norm < gear_cmd_norm)
 357             gear_pos_norm = gear_cmd_norm;
 358         }
 359         // set the gear position
 360         fgSetDouble("/gear/gear[0]/position-norm", gear_pos_norm);
 361         fgSetDouble("/gear/gear[1]/position-norm", gear_pos_norm);
 362         fgSetDouble("/gear/gear[2]/position-norm", gear_pos_norm);
 363       }
 364
 365
 366       // engine functions (sounds and instruments)
 367       // drive the rpm gauge
 368       fgSetDouble("/engines/engine/rpm", (globals->get_controls()->get_throttle( 0 ) * 100.0 * 25 ));
 369       // manifold air pressure
 370       fgSetDouble("/engines/engine/mp-osi", (globals->get_controls()->get_throttle( 0 ) * 100.0 ));
 371       // make the engine cranking and running sounds when fgfs starts up
 372       fgSetDouble("/engines/engine/cranking", 1);
 373       fgSetDouble("/engines/engine/running", 1);
 374       if ( !strcmp(uiuc_type->getStringValue(), "uiuc-prop")) {
 375         // uiuc prop driven airplane, e.g. Wright Flyer
 376       }
 377       else if ( !strcmp(uiuc_type->getStringValue(), "uiuc-jet")) {
 378         // uiuc jet aircraft, e.g. a4d
 379         // used for setting the sound
 380         fgSetDouble("/engines/engine/n1", (75 + (globals->get_controls()->get_throttle( 0 ) * 100.0 )/400));
 381         fgSetDouble("/engines/engine/prop-thrust", (4000 + F_X_engine/2));
 382         // used for setting the instruments
 383         fgSetDouble("/engines/engine[0]/n1", (50 + (globals->get_controls()->get_throttle( 0 ) * 50)));
 384       }
 385       else if ( !strcmp(uiuc_type->getStringValue(), "uiuc-sailplane")) {
 386         // uiuc sailplane, e.g. asw20
 387         fgSetDouble("/engines/engine/cranking", 0);
 388       }
 389       else if ( !strcmp(uiuc_type->getStringValue(), "uiuc-hangglider")) {
 390         // uiuc hang glider, e.g. airwave
 391         fgSetDouble("/engines/engine/cranking", 0);
 392       }
 393       else if ( !strcmp(uiuc_type->getStringValue(), "uiuc-ornithopter")) {
 394         // flapping wings
 395         fgSetDouble("/canopy/position-norm", 0);
 396         fgSetDouble("/wing-phase/position-norm", sin(flapper_phi - 3 * LS_PI / 2));
 397         fgSetDouble("/wing-phase/position-deg", flapper_phi*RAD_TO_DEG);
 398         fgSetDouble("/wing-phase/position-one", 1);
 399         fgSetDouble("/thorax/volume", 0);
 400         fgSetDouble("/thorax/rpm",    0);
 401         //      fgSetDouble("/thorax/volume", ((1+sin(2*(flapper_phi+LS_PI)))/2));
 402         //      fgSetDouble("/thorax/rpm",    ((1+sin(2*(flapper_phi+LS_PI)))/2));
 403       }
 404     }
 405
 406
 407     // add Gamma_horiz_deg to properties, mss 021213
 408     if (use_gamma_horiz_on_speed) {
 409       if (V_rel_wind > gamma_horiz_on_speed) {
 410         fgSetDouble("/orientation/gamma-horiz-deg", (Gamma_horiz_rad * RAD_TO_DEG));
 411       }
 412       else {
 413         fgSetDouble("/orientation/gamma-horiz-deg",  fgGetDouble("/orientation/heading-deg"));
 414       }
 415     }
 416     else {
 417       fgSetDouble("/orientation/gamma-horiz-deg",  fgGetDouble("/orientation/heading-deg"));
 418     }
 419     ls_update(multiloop);
 420
 421     // printf("%d FG_Altitude = %.2f\n", i, FG_Altitude * 0.3048);
 422     // printf("%d Altitude = %.2f\n", i, Altitude * 0.3048);
 423
 424     // translate LaRCsim back to FG structure so that the
 425     // autopilot (and the rest of the sim can use the updated
 426     // values
 427     copy_from_LaRCsim();
 428
 429     // but lets restore our original bogus altitude when we are done
 430     if ( save_alt < -9000.0 ) {
 431         set_Altitude( save_alt );
 432     }
 433 }
 434
 435
 436 // Convert from the FGInterface struct to the LaRCsim generic_ struct
 437 bool FGLaRCsim::copy_to_LaRCsim () {
 438     Mass =      get_Mass();
 439     I_xx =      get_I_xx();
 440     I_yy =      get_I_yy();
 441     I_zz =      get_I_zz();
 442     I_xz =      get_I_xz();
 443     // Dx_pilot =  get_Dx_pilot();
 444     // Dy_pilot =  get_Dy_pilot();
 445     // Dz_pilot =  get_Dz_pilot();
 446     Dx_cg =     get_Dx_cg();
 447     Dy_cg =     get_Dy_cg();
 448     Dz_cg =     get_Dz_cg();
 449     // F_X =       get_F_X();
 450     // F_Y =       get_F_Y();
 451     // F_Z =       get_F_Z();
 452     // F_north =   get_F_north();
 453     // F_east =    get_F_east();
 454     // F_down =    get_F_down();
 455     // F_X_aero =  get_F_X_aero();
 456     // F_Y_aero =  get_F_Y_aero();
 457     // F_Z_aero =  get_F_Z_aero();
 458     // F_X_engine =        get_F_X_engine();
 459     // F_Y_engine =        get_F_Y_engine();
 460     // F_Z_engine =        get_F_Z_engine();
 461     // F_X_gear =  get_F_X_gear();
 462     // F_Y_gear =  get_F_Y_gear();
 463     // F_Z_gear =  get_F_Z_gear();
 464     // M_l_rp =    get_M_l_rp();
 465     // M_m_rp =    get_M_m_rp();
 466     // M_n_rp =    get_M_n_rp();
 467     // M_l_cg =    get_M_l_cg();
 468     // M_m_cg =    get_M_m_cg();
 469     // M_n_cg =    get_M_n_cg();
 470     // M_l_aero =  get_M_l_aero();
 471     // M_m_aero =  get_M_m_aero();
 472     // M_n_aero =  get_M_n_aero();
 473     // M_l_engine =        get_M_l_engine();
 474     // M_m_engine =        get_M_m_engine();
 475     // M_n_engine =        get_M_n_engine();
 476     // M_l_gear =  get_M_l_gear();
 477     // M_m_gear =  get_M_m_gear();
 478     // M_n_gear =  get_M_n_gear();
 479     // V_dot_north =       get_V_dot_north();
 480     // V_dot_east =        get_V_dot_east();
 481     // V_dot_down =        get_V_dot_down();
 482     // U_dot_body =        get_U_dot_body();
 483     // V_dot_body =        get_V_dot_body();
 484     // W_dot_body =        get_W_dot_body();
 485     // A_X_cg =    get_A_X_cg();
 486     // A_Y_cg =    get_A_Y_cg();
 487     // A_Z_cg =    get_A_Z_cg();
 488     // A_X_pilot = get_A_X_pilot();
 489     // A_Y_pilot = get_A_Y_pilot();
 490     // A_Z_pilot = get_A_Z_pilot();
 491     // N_X_cg =    get_N_X_cg();
 492     // N_Y_cg =    get_N_Y_cg();
 493     // N_Z_cg =    get_N_Z_cg();
 494     // N_X_pilot = get_N_X_pilot();
 495     // N_Y_pilot = get_N_Y_pilot();
 496     // N_Z_pilot = get_N_Z_pilot();
 497     // P_dot_body =        get_P_dot_body();
 498     // Q_dot_body =        get_Q_dot_body();
 499     // R_dot_body =        get_R_dot_body();
 500     // V_north =   get_V_north();
 501     // V_east =    get_V_east();
 502     // V_down =    get_V_down();
 503     // V_north_rel_ground =        get_V_north_rel_ground();
 504     // V_east_rel_ground = get_V_east_rel_ground();
 505     // V_down_rel_ground = get_V_down_rel_ground();
 506     // V_north_airmass =   get_V_north_airmass();
 507     // V_east_airmass =    get_V_east_airmass();
 508     // V_down_airmass =    get_V_down_airmass();
 509     // V_north_rel_airmass =       get_V_north_rel_airmass();
 510     // V_east_rel_airmass =        get_V_east_rel_airmass();
 511     // V_down_rel_airmass =        get_V_down_rel_airmass();
 512     // U_gust =    get_U_gust();
 513     // V_gust =    get_V_gust();
 514     // W_gust =    get_W_gust();
 515     // U_body =    get_U_body();
 516     // V_body =    get_V_body();
 517     // W_body =    get_W_body();
 518     // V_rel_wind =        get_V_rel_wind();
 519     // V_true_kts =        get_V_true_kts();
 520     // V_rel_ground =      get_V_rel_ground();
 521     // V_inertial =        get_V_inertial();
 522     // V_ground_speed =    get_V_ground_speed();
 523     // V_equiv =   get_V_equiv();
 524     // V_equiv_kts =       get_V_equiv_kts();
 525     // V_calibrated =      get_V_calibrated();
 526     // V_calibrated_kts =  get_V_calibrated_kts();
 527     // P_body =    get_P_body();
 528     // Q_body =    get_Q_body();
 529     // R_body =    get_R_body();
 530     // P_local =   get_P_local();
 531     // Q_local =   get_Q_local();
 532     // R_local =   get_R_local();
 533     // P_total =   get_P_total();
 534     // Q_total =   get_Q_total();
 535     // R_total =   get_R_total();
 536     // Phi_dot =   get_Phi_dot();
 537     // Theta_dot = get_Theta_dot();
 538     // Psi_dot =   get_Psi_dot();
 539     // Latitude_dot =      get_Latitude_dot();
 540     // Longitude_dot =     get_Longitude_dot();
 541     // Radius_dot =        get_Radius_dot();
 542     // Lat_geocentric =    get_Lat_geocentric();
 543     // Lon_geocentric =    get_Lon_geocentric();
 544     // Radius_to_vehicle = get_Radius_to_vehicle();
 545     // Latitude =  get_Latitude();
 546     // Longitude = get_Longitude();
 547     // Altitude =  get_Altitude();
 548     // Phi =       get_Phi();
 549     // Theta =     get_Theta();
 550     // Psi =       get_Psi();
 551     // T_local_to_body_11 =        get_T_local_to_body_11();
 552     // T_local_to_body_12 =        get_T_local_to_body_12();
 553     // T_local_to_body_13 =        get_T_local_to_body_13();
 554     // T_local_to_body_21 =        get_T_local_to_body_21();
 555     // T_local_to_body_22 =        get_T_local_to_body_22();
 556     // T_local_to_body_23 =        get_T_local_to_body_23();
 557     // T_local_to_body_31 =        get_T_local_to_body_31();
 558     // T_local_to_body_32 =        get_T_local_to_body_32();
 559     // T_local_to_body_33 =        get_T_local_to_body_33();
 560     // Gravity =   get_Gravity();
 561     // Centrifugal_relief =        get_Centrifugal_relief();
 562     // Alpha =     get_Alpha();
 563     // Beta =      get_Beta();
 564     // Alpha_dot = get_Alpha_dot();
 565     // Beta_dot =  get_Beta_dot();
 566     // Cos_alpha = get_Cos_alpha();
 567     // Sin_alpha = get_Sin_alpha();
 568     // Cos_beta =  get_Cos_beta();
 569     // Sin_beta =  get_Sin_beta();
 570     // Cos_phi =   get_Cos_phi();
 571     // Sin_phi =   get_Sin_phi();
 572     // Cos_theta = get_Cos_theta();
 573     // Sin_theta = get_Sin_theta();
 574     // Cos_psi =   get_Cos_psi();
 575     // Sin_psi =   get_Sin_psi();
 576     // Gamma_vert_rad =    get_Gamma_vert_rad();
 577     // Gamma_horiz_rad =   get_Gamma_horiz_rad();
 578     // Sigma =     get_Sigma();
 579     // Density =   get_Density();
 580     // V_sound =   get_V_sound();
 581     // Mach_number =       get_Mach_number();
 582     // Static_pressure =   get_Static_pressure();
 583     // Total_pressure =    get_Total_pressure();
 584     // Impact_pressure =   get_Impact_pressure();
 585     // Dynamic_pressure =  get_Dynamic_pressure();
 586     // Static_temperature =        get_Static_temperature();
 587     // Total_temperature = get_Total_temperature();
 588     // Sea_level_radius =  get_Sea_level_radius();
 589     // Earth_position_angle =      get_Earth_position_angle();
 590     // Runway_altitude =   get_Runway_altitude();
 591     // Runway_latitude =   get_Runway_latitude();
 592     // Runway_longitude =  get_Runway_longitude();
 593     // Runway_heading =    get_Runway_heading();
 594     // Radius_to_rwy =     get_Radius_to_rwy();
 595     // D_cg_north_of_rwy = get_D_cg_north_of_rwy();
 596     // D_cg_east_of_rwy =  get_D_cg_east_of_rwy();
 597     // D_cg_above_rwy =    get_D_cg_above_rwy();
 598     // X_cg_rwy =  get_X_cg_rwy();
 599     // Y_cg_rwy =  get_Y_cg_rwy();
 600     // H_cg_rwy =  get_H_cg_rwy();
 601     // D_pilot_north_of_rwy =      get_D_pilot_north_of_rwy();
 602     // D_pilot_east_of_rwy =       get_D_pilot_east_of_rwy();
 603     // D_pilot_above_rwy = get_D_pilot_above_rwy();
 604     // X_pilot_rwy =       get_X_pilot_rwy();
 605     // Y_pilot_rwy =       get_Y_pilot_rwy();
 606     // H_pilot_rwy =       get_H_pilot_rwy();
 607
 608     return true;
 609 }
 610
 611
 612 // Convert from the LaRCsim generic_ struct to the FGInterface struct
 613 bool FGLaRCsim::copy_from_LaRCsim() {
 614
 615     // Mass properties and geometry values
 616     _set_Inertias( Mass, I_xx, I_yy, I_zz, I_xz );
 617     // set_Pilot_Location( Dx_pilot, Dy_pilot, Dz_pilot );
 618     _set_CG_Position( Dx_cg, Dy_cg, Dz_cg );
 619
 620     // Forces
 621     // set_Forces_Body_Total( F_X, F_Y, F_Z );
 622     // set_Forces_Local_Total( F_north, F_east, F_down );
 623     // set_Forces_Aero( F_X_aero, F_Y_aero, F_Z_aero );
 624     // set_Forces_Engine( F_X_engine, F_Y_engine, F_Z_engine );
 625     // set_Forces_Gear( F_X_gear, F_Y_gear, F_Z_gear );
 626
 627     // Moments
 628     // set_Moments_Total_RP( M_l_rp, M_m_rp, M_n_rp );
 629     // set_Moments_Total_CG( M_l_cg, M_m_cg, M_n_cg );
 630     // set_Moments_Aero( M_l_aero, M_m_aero, M_n_aero );
 631     // set_Moments_Engine( M_l_engine, M_m_engine, M_n_engine );
 632     // set_Moments_Gear( M_l_gear, M_m_gear, M_n_gear );
 633
 634     // Accelerations
 635     _set_Accels_Local( V_dot_north, V_dot_east, V_dot_down );
 636     _set_Accels_Body( U_dot_body, V_dot_body, W_dot_body );
 637     _set_Accels_CG_Body( A_X_cg, A_Y_cg, A_Z_cg );
 638     _set_Accels_Pilot_Body( A_X_pilot, A_Y_pilot, A_Z_pilot );
 639     _set_Accels_CG_Body_N( N_X_cg, N_Y_cg, -N_Z_cg );
 640     // set_Accels_Pilot_Body_N( N_X_pilot, N_Y_pilot, N_Z_pilot );
 641     // set_Accels_Omega( P_dot_body, Q_dot_body, R_dot_body );
 642
 643     // Velocities
 644     _set_Velocities_Local( V_north, V_east, V_down );
 645     // set_Velocities_Ground( V_north_rel_ground, V_east_rel_ground,
 646     //               V_down_rel_ground );
 647     _set_Velocities_Local_Airmass( V_north_airmass, V_east_airmass,
 648                                    V_down_airmass );
 649     // set_Velocities_Local_Rel_Airmass( V_north_rel_airmass,
 650     //                          V_east_rel_airmass, V_down_rel_airmass );
 651     // set_Velocities_Gust( U_gust, V_gust, W_gust );
 652     _set_Velocities_Wind_Body( U_body, V_body, W_body );
 653
 654     _set_V_rel_wind( V_rel_wind );
 655     // set_V_true_kts( V_true_kts );
 656     // set_V_rel_ground( V_rel_ground );
 657     // set_V_inertial( V_inertial );
 658     _set_V_ground_speed( V_ground_speed );
 659     // set_V_equiv( V_equiv );
 660     _set_V_equiv_kts( V_equiv_kts );
 661     // set_V_calibrated( V_calibrated );
 662     _set_V_calibrated_kts( V_calibrated_kts );
 663
 664     _set_Omega_Body( P_body, Q_body, R_body );
 665     // set_Omega_Local( P_local, Q_local, R_local );
 666     // set_Omega_Total( P_total, Q_total, R_total );
 667
 668     _set_Euler_Rates( Phi_dot, Theta_dot, Psi_dot );
 669     _set_Geocentric_Rates( Latitude_dot, Longitude_dot, Radius_dot );
 670
 671     _set_Mach_number( Mach_number );
 672
 673     SG_LOG( SG_FLIGHT, SG_DEBUG, "lon = " << Longitude
 674             << " lat_geoc = " << Lat_geocentric << " lat_geod = " << Latitude
 675             << " alt = " << Altitude << " sl_radius = " << Sea_level_radius
 676             << " radius_to_vehicle = " << Radius_to_vehicle );
 677
 678     double tmp_lon_geoc = Lon_geocentric;
 679     while ( tmp_lon_geoc < -SGD_PI ) { tmp_lon_geoc += SGD_2PI; }
 680     while ( tmp_lon_geoc > SGD_PI ) { tmp_lon_geoc -= SGD_2PI; }
 681
 682     double tmp_lon = Longitude;
 683     while ( tmp_lon < -SGD_PI ) { tmp_lon += SGD_2PI; }
 684     while ( tmp_lon > SGD_PI ) { tmp_lon -= SGD_2PI; }
 685
 686     // Positions
 687     _set_Geocentric_Position( Lat_geocentric, tmp_lon_geoc,
 688                               Radius_to_vehicle );
 689     _set_Geodetic_Position( Latitude, tmp_lon, Altitude );
 690     _set_Euler_Angles( Phi, Theta, Psi );
 691
 692     _set_Altitude_AGL( Altitude - Runway_altitude );
 693
 694     // Miscellaneous quantities
 695     _set_T_Local_to_Body(T_local_to_body_m);
 696     // set_Gravity( Gravity );
 697     // set_Centrifugal_relief( Centrifugal_relief );
 698
 699     _set_Alpha( Std_Alpha );
 700     _set_Beta( Std_Beta );
 701     // set_Alpha_dot( Std_Alpha_dot );
 702     // set_Beta_dot( Std_Beta_dot );
 703
 704     // set_Cos_alpha( Cos_alpha );
 705     // set_Sin_alpha( Sin_alpha );
 706     // set_Cos_beta( Cos_beta );
 707     // set_Sin_beta( Sin_beta );
 708
 709     _set_Cos_phi( Cos_phi );
 710     // set_Sin_phi( Sin_phi );
 711     _set_Cos_theta( Cos_theta );
 712     // set_Sin_theta( Sin_theta );
 713     // set_Cos_psi( Cos_psi );
 714     // set_Sin_psi( Sin_psi );
 715
 716     _set_Gamma_vert_rad( Gamma_vert_rad );
 717     // set_Gamma_horiz_rad( Gamma_horiz_rad );
 718
 719     // set_Sigma( Sigma );
 720     _set_Density( Density );
 721     // set_V_sound( V_sound );
 722     // set_Mach_number( Mach_number );
 723
 724     _set_Static_pressure( Static_pressure );
 725     // set_Total_pressure( Total_pressure );
 726     // set_Impact_pressure( Impact_pressure );
 727     // set_Dynamic_pressure( Dynamic_pressure );
 728
 729     _set_Static_temperature( Static_temperature );
 730     // set_Total_temperature( Total_temperature );
 731
 732     _set_Sea_level_radius( Sea_level_radius );
 733     _set_Earth_position_angle( Earth_position_angle );
 734
 735     _set_Runway_altitude( Runway_altitude );
 736     // set_Runway_latitude( Runway_latitude );
 737     // set_Runway_longitude( Runway_longitude );
 738     // set_Runway_heading( Runway_heading );
 739     // set_Radius_to_rwy( Radius_to_rwy );
 740
 741     // set_CG_Rwy_Local( D_cg_north_of_rwy, D_cg_east_of_rwy, D_cg_above_rwy);
 742     // set_CG_Rwy_Rwy( X_cg_rwy, Y_cg_rwy, H_cg_rwy );
 743     // set_Pilot_Rwy_Local( D_pilot_north_of_rwy, D_pilot_east_of_rwy,
 744     //                        D_pilot_above_rwy );
 745     // set_Pilot_Rwy_Rwy( X_pilot_rwy, Y_pilot_rwy, H_pilot_rwy );
 746
 747     _set_sin_lat_geocentric(Lat_geocentric);
 748     _set_cos_lat_geocentric(Lat_geocentric);
 749     _set_sin_cos_longitude(Longitude);
 750     _set_sin_cos_latitude(Latitude);
 751
 752     // printf("sin_lat_geo %f  cos_lat_geo %f\n", sin_Lat_geoc, cos_Lat_geoc);
 753     // printf("sin_lat     %f  cos_lat     %f\n",
 754     //        get_sin_latitude(), get_cos_latitude());
 755     // printf("sin_lon     %f  cos_lon     %f\n",
 756     //        get_sin_longitude(), get_cos_longitude());
 757
 758     _set_Climb_Rate( -1 * V_down );
 759     // cout << "climb rate = " << -V_down * 60 << endl;
 760
 761     if ( !strcmp(aero->getStringValue(), "uiuc") ) {
 762         if (pilot_elev_no) {
 763             globals->get_controls()->set_elevator(Long_control);
 764             globals->get_controls()->set_elevator_trim(Long_trim);
 765             //      controls.set_elevator(Long_control);
 766             //      controls.set_elevator_trim(Long_trim);
 767         }
 768         if (pilot_ail_no) {
 769             globals->get_controls()->set_aileron(Lat_control);
 770             //    controls.set_aileron(Lat_control);
 771         }
 772         if (pilot_rud_no) {
 773             globals->get_controls()->set_rudder(Rudder_pedal);
 774             //    controls.set_rudder(Rudder_pedal);
 775         }
 776         if (pilot_throttle_no) {
 777             globals->get_controls()->set_throttle(0,Throttle_pct);
 778             //    controls.set_throttle(0,Throttle_pct);
 779         }
 780     }
 781
 782     return true;
 783 }
 784
 785
 786 void FGLaRCsim::set_ls(void) {
 787     Phi=lsic->GetRollAngleRadIC();
 788     Theta=lsic->GetPitchAngleRadIC();
 789     Psi=lsic->GetHeadingRadIC();
 790     V_north=lsic->GetVnorthFpsIC();
 791     V_east=lsic->GetVeastFpsIC();
 792     V_down=lsic->GetVdownFpsIC();
 793     Altitude=lsic->GetAltitudeFtIC();
 794     Latitude=lsic->GetLatitudeGDRadIC();
 795     Longitude=lsic->GetLongitudeRadIC();
 796     Runway_altitude=lsic->GetRunwayAltitudeFtIC();
 797     V_north_airmass = lsic->GetVnorthAirmassFpsIC() * -1;
 798     V_east_airmass = lsic->GetVeastAirmassFpsIC() * -1;
 799     V_down_airmass = lsic->GetVdownAirmassFpsIC() * -1;
 800     ls_loop(0.0,-1);
 801     copy_from_LaRCsim();
 802 }
 803
 804 void FGLaRCsim::snap_shot(void) {
 805     lsic->SetLatitudeGDRadIC( get_Latitude() );
 806     lsic->SetLongitudeRadIC( get_Longitude() );
 807     lsic->SetAltitudeFtIC( get_Altitude() );
 808     lsic->SetRunwayAltitudeFtIC( get_Runway_altitude() );
 809     lsic->SetVtrueFpsIC( get_V_rel_wind() );
 810     lsic->SetPitchAngleRadIC( get_Theta() );
 811     lsic->SetRollAngleRadIC( get_Phi() );
 812     lsic->SetHeadingRadIC( get_Psi() );
 813     lsic->SetClimbRateFpsIC( get_Climb_Rate() );
 814     lsic->SetVNEDAirmassFpsIC( get_V_north_airmass(),
 815                                get_V_east_airmass(),
 816                                get_V_down_airmass() );
 817 }
 818
 819 //Positions
 820 void FGLaRCsim::set_Latitude(double lat) {
 821     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_Latitude: " << lat  );
 822     snap_shot();
 823     lsic->SetLatitudeGDRadIC(lat);
 824     set_ls();
 825     copy_from_LaRCsim(); //update the bus
 826 }
 827
 828 void FGLaRCsim::set_Longitude(double lon) {
 829     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_Longitude: " << lon  );
 830     snap_shot();
 831     lsic->SetLongitudeRadIC(lon);
 832     set_ls();
 833     copy_from_LaRCsim(); //update the bus
 834 }
 835
 836 void FGLaRCsim::set_Altitude(double alt) {
 837     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_Altitude: " << alt  );
 838     snap_shot();
 839     lsic->SetAltitudeFtIC(alt);
 840     set_ls();
 841     copy_from_LaRCsim(); //update the bus
 842 }
 843
 844 void FGLaRCsim::set_V_calibrated_kts(double vc) {
 845     SG_LOG( SG_FLIGHT, SG_INFO,
 846             "FGLaRCsim::set_V_calibrated_kts: " << vc  );
 847     snap_shot();
 848     lsic->SetVcalibratedKtsIC(vc);
 849     set_ls();
 850     copy_from_LaRCsim(); //update the bus
 851 }
 852
 853 void FGLaRCsim::set_Mach_number(double mach) {
 854     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_Mach_number: " << mach  );
 855     snap_shot();
 856     lsic->SetMachIC(mach);
 857     set_ls();
 858     copy_from_LaRCsim(); //update the bus
 859 }
 860
 861 void FGLaRCsim::set_Velocities_Local( double north, double east, double down ){
 862     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_Velocities_local: "
 863             << north << "  " << east << "  " << down   );
 864     snap_shot();
 865     lsic->SetVNEDFpsIC(north, east, down);
 866     set_ls();
 867     copy_from_LaRCsim(); //update the bus
 868 }
 869
 870 void FGLaRCsim::set_Velocities_Wind_Body( double u, double v, double w){
 871     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_Velocities_Wind_Body: "
 872             << u << "  " << v << "  " << w   );
 873     snap_shot();
 874     lsic->SetUVWFpsIC(u,v,w);
 875     set_ls();
 876     copy_from_LaRCsim(); //update the bus
 877 }
 878
 879 //Euler angles
 880 void FGLaRCsim::set_Euler_Angles( double phi, double theta, double psi ) {
 881     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_Euler_angles: "
 882             << phi << "  " << theta << "  " << psi   );
 883
 884     snap_shot();
 885     lsic->SetPitchAngleRadIC(theta);
 886     lsic->SetRollAngleRadIC(phi);
 887     lsic->SetHeadingRadIC(psi);
 888     set_ls();
 889     copy_from_LaRCsim(); //update the bus
 890 }
 891
 892 //Flight Path
 893 void FGLaRCsim::set_Climb_Rate( double roc) {
 894     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_Climb_rate: " << roc  );
 895     snap_shot();
 896     lsic->SetClimbRateFpsIC(roc);
 897     set_ls();
 898     copy_from_LaRCsim(); //update the bus
 899 }
 900
 901 void FGLaRCsim::set_Gamma_vert_rad( double gamma) {
 902     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_Gamma_vert_rad: " << gamma  );
 903     snap_shot();
 904     lsic->SetFlightPathAngleRadIC(gamma);
 905     set_ls();
 906     copy_from_LaRCsim(); //update the bus
 907 }
 908
 909 void FGLaRCsim::set_AltitudeAGL(double altagl) {
 910     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_AltitudeAGL: " << altagl  );
 911     snap_shot();
 912     lsic->SetAltitudeAGLFtIC(altagl);
 913     set_ls();
 914     copy_from_LaRCsim();
 915 }
 916
 917 /*  getting a namespace conflict...
 918 void FGLaRCsim::set_Velocities_Local_Airmass (double wnorth,
 919                                               double weast,
 920                                               double wdown ) {
 921     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_Velocities_Local_Airmass: "
 922             << wnorth << "  " << weast << "  " << wdown );
 923     snap_shot();
 924     lsic->SetVNEDAirmassFpsIC( wnorth, weast, wdown );
 925     set_ls();
 926     copy_from_LaRCsim();
 927 }
 928 */
 929
 930 void FGLaRCsim::set_Static_pressure(double p) {
 931     SG_LOG( SG_FLIGHT, SG_INFO,
 932             "FGLaRCsim::set_Static_pressure: " << p  );
 933     SG_LOG( SG_FLIGHT, SG_INFO,
 934             "LaRCsim does not support externally supplied atmospheric data" );
 935 }
 936
 937 void FGLaRCsim::set_Static_temperature(double T) {
 938     SG_LOG( SG_FLIGHT, SG_INFO,
 939             "FGLaRCsim::set_Static_temperature: " << T  );
 940     SG_LOG( SG_FLIGHT, SG_INFO,
 941             "LaRCsim does not support externally supplied atmospheric data" );
 942
 943 }
 944
 945 void FGLaRCsim::set_Density(double rho) {
 946     SG_LOG( SG_FLIGHT, SG_INFO, "FGLaRCsim::set_Density: " << rho  );
 947     SG_LOG( SG_FLIGHT, SG_INFO,
 948             "LaRCsim does not support externally supplied atmospheric data" );
 949
 950 }
 951