src/Airports/dynamics.cxx

   1 // dynamics.cxx - Code to manage the higher order airport ground activities
   2 // Written by Durk Talsma, started December 2004.
   3 //
   4 //
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License as
   7 // published by the Free Software Foundation; either version 2 of the
   8 // License, or (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful, but
  11 // WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 // General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18 //
  19 // $Id$
  20
  21 #ifdef HAVE_CONFIG_H
  22 #  include <config.h>
  23 #endif
  24
  25 #include <algorithm>
  26
  27 #include <simgear/compiler.h>
  28
  29 #include <plib/ul.h>
  30
  31 #include <Environment/environment_mgr.hxx>
  32 #include <Environment/environment.hxx>
  33 #include <simgear/misc/sg_path.hxx>
  34 #include <simgear/props/props.hxx>
  35 #include <simgear/structure/subsystem_mgr.hxx>
  36 #include <simgear/debug/logstream.hxx>
  37 #include <simgear/route/waypoint.hxx>
  38 #include <Main/globals.hxx>
  39 #include <Main/fg_props.hxx>
  40 #include <Airports/runways.hxx>
  41
  42 #include <string>
  43 #include <vector>
  44
  45 using std::string;
  46 using std::vector;
  47 using std::sort;
  48 using std::random_shuffle;
  49
  50 #include "simple.hxx"
  51 #include "dynamics.hxx"
  52
  53 FGAirportDynamics::FGAirportDynamics(FGAirport * ap):
  54 _ap(ap), rwyPrefs(ap), SIDs(ap)
  55 {
  56     lastUpdate = 0;
  57
  58     // For testing only. This needs to be refined when we move ATIS functionality over.
  59     atisInformation = "Sierra";
  60 }
  61
  62 // Note that the ground network should also be copied
  63 FGAirportDynamics::
  64 FGAirportDynamics(const FGAirportDynamics & other):rwyPrefs(other.
  65                                                             rwyPrefs),
  66 SIDs(other.SIDs)
  67 {
  68     for (FGParkingVecConstIterator ip = other.parkings.begin();
  69          ip != other.parkings.end(); ip++)
  70         parkings.push_back(*(ip));
  71     // rwyPrefs = other.rwyPrefs;
  72     lastUpdate = other.lastUpdate;
  73
  74     stringVecConstIterator il;
  75     for (il = other.landing.begin(); il != other.landing.end(); il++)
  76         landing.push_back(*il);
  77     for (il = other.takeoff.begin(); il != other.takeoff.end(); il++)
  78         takeoff.push_back(*il);
  79     lastUpdate = other.lastUpdate;
  80     atisInformation = other.atisInformation;
  81 }
  82
  83 // Destructor
  84 FGAirportDynamics::~FGAirportDynamics()
  85 {
  86 }
  87
  88
  89 // Initialization required after XMLRead
  90 void FGAirportDynamics::init()
  91 {
  92     // This may seem a bit weird to first randomly shuffle the parkings
  93     // and then sort them again. However, parkings are sorted here by ascending
  94     // radius. Since many parkings have similar radii, with each radius class they will
  95     // still be allocated relatively systematically. Randomizing prior to sorting will
  96     // prevent any initial orderings to be destroyed, leading (hopefully) to a more
  97     // naturalistic gate assignment.
  98     random_shuffle(parkings.begin(), parkings.end());
  99     sort(parkings.begin(), parkings.end());
 100     // add the gate positions to the ground network.
 101     groundNetwork.addNodes(&parkings);
 102     groundNetwork.init();
 103     groundNetwork.setTowerController(&towerController);
 104     groundNetwork.setParent(_ap);
 105 }
 106
 107 bool FGAirportDynamics::getAvailableParking(double *lat, double *lon,
 108                                             double *heading, int *gateId,
 109                                             double rad,
 110                                             const string & flType,
 111                                             const string & acType,
 112                                             const string & airline)
 113 {
 114     bool found = false;
 115     bool available = false;
 116
 117
 118     FGParkingVecIterator i;
 119     if (parkings.begin() == parkings.end()) {
 120         //cerr << "Could not find parking spot at " << _ap->getId() << endl;
 121         *lat = _ap->getLatitude();
 122         *lon = _ap->getLongitude();
 123         *heading = 0;
 124         found = true;
 125     } else {
 126         // First try finding a parking with a designated airline code
 127         for (i = parkings.begin(); !(i == parkings.end() || found); i++) {
 128             available = true;
 129             // Taken by another aircraft
 130             if (!(i->isAvailable())) {
 131                 available = false;
 132                 continue;
 133             }
 134             // No airline codes, so skip
 135             if (i->getCodes().empty()) {
 136                 available = false;
 137                 continue;
 138             } else {             // Airline code doesn't match
 139                 //cerr << "Code = " << airline << ": Codes " << i->getCodes();
 140                 if (i->getCodes().find(airline, 0) == string::npos) {
 141                     available = false;
 142                     //cerr << "Unavailable" << endl;
 143                     continue;
 144                 } else {
 145                     //cerr << "Available" << endl;
 146                 }
 147             }
 148             // Type doesn't match
 149             if (i->getType() != flType) {
 150                 available = false;
 151                 continue;
 152             }
 153             // too small
 154             if (i->getRadius() < rad) {
 155                 available = false;
 156                 continue;
 157             }
 158
 159             if (available) {
 160                 *lat = i->getLatitude();
 161                 *lon = i->getLongitude();
 162                 *heading = i->getHeading();
 163                 *gateId = i->getIndex();
 164                 i->setAvailable(false);
 165                 found = true;
 166             }
 167         }
 168         // then try again for those without codes.
 169         for (i = parkings.begin(); !(i == parkings.end() || found); i++) {
 170             available = true;
 171             if (!(i->isAvailable())) {
 172                 available = false;
 173                 continue;
 174             }
 175             if (!(i->getCodes().empty())) {
 176                 if ((i->getCodes().find(airline, 0) == string::npos)) {
 177                     available = false;
 178                     continue;
 179                 }
 180             }
 181             if (i->getType() != flType) {
 182                 available = false;
 183                 continue;
 184             }
 185
 186             if (i->getRadius() < rad) {
 187                 available = false;
 188                 continue;
 189             }
 190
 191             if (available) {
 192                 *lat = i->getLatitude();
 193                 *lon = i->getLongitude();
 194                 *heading = i->getHeading();
 195                 *gateId = i->getIndex();
 196                 i->setAvailable(false);
 197                 found = true;
 198             }
 199         }
 200         // And finally once more if that didn't work. Now ignore the airline codes, as a last resort
 201         for (i = parkings.begin(); !(i == parkings.end() || found); i++) {
 202             available = true;
 203             if (!(i->isAvailable())) {
 204                 available = false;
 205                 continue;
 206             }
 207             if (i->getType() != flType) {
 208                 available = false;
 209                 continue;
 210             }
 211
 212             if (i->getRadius() < rad) {
 213                 available = false;
 214                 continue;
 215             }
 216
 217             if (available) {
 218                 *lat = i->getLatitude();
 219                 *lon = i->getLongitude();
 220                 *heading = i->getHeading();
 221                 *gateId = i->getIndex();
 222                 i->setAvailable(false);
 223                 found = true;
 224             }
 225         }
 226     }
 227     if (!found) {
 228         //cerr << "Traffic overflow at" << _ap->getId()
 229         //           << ". flType = " << flType
 230         //           << ". airline = " << airline
 231         //           << " Radius = " <<rad
 232         //           << endl;
 233         *lat = _ap->getLatitude();
 234         *lon = _ap->getLongitude();
 235         *heading = 0;
 236         *gateId = -1;
 237         //exit(1);
 238     }
 239     return found;
 240 }
 241
 242 void FGAirportDynamics::getParking(int id, double *lat, double *lon,
 243                                    double *heading)
 244 {
 245     if (id < 0) {
 246         *lat = _ap->getLatitude();
 247         *lon = _ap->getLongitude();
 248         *heading = 0;
 249     } else {
 250         FGParkingVecIterator i = parkings.begin();
 251         for (i = parkings.begin(); i != parkings.end(); i++) {
 252             if (id == i->getIndex()) {
 253                 *lat = i->getLatitude();
 254                 *lon = i->getLongitude();
 255                 *heading = i->getHeading();
 256             }
 257         }
 258     }
 259 }
 260
 261 FGParking *FGAirportDynamics::getParking(int id)
 262 {
 263     FGParkingVecIterator i = parkings.begin();
 264     for (i = parkings.begin(); i != parkings.end(); i++) {
 265         if (id == i->getIndex()) {
 266             return &(*i);
 267         }
 268     }
 269     return 0;
 270 }
 271
 272 string FGAirportDynamics::getParkingName(int id)
 273 {
 274     FGParkingVecIterator i = parkings.begin();
 275     for (i = parkings.begin(); i != parkings.end(); i++) {
 276         if (id == i->getIndex()) {
 277             return i->getName();
 278         }
 279     }
 280
 281     return string("overflow");
 282 }
 283
 284 void FGAirportDynamics::releaseParking(int id)
 285 {
 286     if (id >= 0) {
 287
 288         FGParkingVecIterator i = parkings.begin();
 289         for (i = parkings.begin(); i != parkings.end(); i++) {
 290             if (id == i->getIndex()) {
 291                 i->setAvailable(true);
 292             }
 293         }
 294     }
 295 }
 296
 297 void FGAirportDynamics::setRwyUse(const FGRunwayPreference & ref)
 298 {
 299     rwyPrefs = ref;
 300     //cerr << "Exiting due to not implemented yet" << endl;
 301     //exit(1);
 302 }
 303
 304 bool FGAirportDynamics::innerGetActiveRunway(const string & trafficType,
 305                                              int action, string & runway,
 306                                              double heading)
 307 {
 308     double windSpeed;
 309     double windHeading;
 310     double maxTail;
 311     double maxCross;
 312     string name;
 313     string type;
 314
 315     if (!rwyPrefs.available()) {
 316         return false;
 317     }
 318
 319     RunwayGroup *currRunwayGroup = 0;
 320     int nrActiveRunways = 0;
 321     time_t dayStart = fgGetLong("/sim/time/utc/day-seconds");
 322     if ((abs((long) (dayStart - lastUpdate)) > 600)
 323         || trafficType != prevTrafficType) {
 324         landing.clear();
 325         takeoff.clear();
 326         lastUpdate = dayStart;
 327         prevTrafficType = trafficType;
 328
 329         FGEnvironment
 330             stationweather =
 331             ((FGEnvironmentMgr *) globals->get_subsystem("environment"))
 332             ->getEnvironment(getLatitude(), getLongitude(),
 333                              getElevation());
 334
 335         windSpeed = stationweather.get_wind_speed_kt();
 336         windHeading = stationweather.get_wind_from_heading_deg();
 337         string scheduleName;
 338         //cerr << "finding active Runway for" << _ap->getId() << endl;
 339         //cerr << "Nr of seconds since day start << " << dayStart << endl;
 340
 341         ScheduleTime *currSched;
 342         //cerr << "A"<< endl;
 343         currSched = rwyPrefs.getSchedule(trafficType.c_str());
 344         if (!(currSched))
 345             return false;
 346         //cerr << "B"<< endl;
 347         scheduleName = currSched->getName(dayStart);
 348         maxTail = currSched->getTailWind();
 349         maxCross = currSched->getCrossWind();
 350         //cerr << "SChedule anme = " << scheduleName << endl;
 351         if (scheduleName.empty())
 352             return false;
 353         //cerr << "C"<< endl;
 354         currRunwayGroup = rwyPrefs.getGroup(scheduleName);
 355         //cerr << "D"<< endl;
 356         if (!(currRunwayGroup))
 357             return false;
 358         nrActiveRunways = currRunwayGroup->getNrActiveRunways();
 359
 360         // Keep a history of the currently active runways, to ensure
 361         // that an already established selection of runways will not
 362         // be overridden once a more preferred selection becomes
 363         // available as that can lead to random runway swapping.
 364         if (trafficType == "com") {
 365             currentlyActive = &comActive;
 366         } else if (trafficType == "gen") {
 367             currentlyActive = &genActive;
 368         } else if (trafficType == "mil") {
 369             currentlyActive = &milActive;
 370         } else if (trafficType == "ul") {
 371             currentlyActive = &ulActive;
 372         }
 373
 374         currRunwayGroup->setActive(_ap,
 375                                    windSpeed,
 376                                    windHeading,
 377                                    maxTail, maxCross, currentlyActive);
 378
 379         // Note that I SHOULD keep multiple lists in memory, one for
 380         // general aviation, one for commercial and one for military
 381         // traffic.
 382         currentlyActive->clear();
 383         nrActiveRunways = currRunwayGroup->getNrActiveRunways();
 384         //cerr << "Choosing runway for " << trafficType << endl;
 385         for (int i = 0; i < nrActiveRunways; i++) {
 386             type = "unknown";   // initialize to something other than landing or takeoff
 387             currRunwayGroup->getActive(i, name, type);
 388             if (type == "landing") {
 389                 landing.push_back(name);
 390                 currentlyActive->push_back(name);
 391                 //cerr << "Landing " << name << endl;
 392             }
 393             if (type == "takeoff") {
 394                 takeoff.push_back(name);
 395                 currentlyActive->push_back(name);
 396                 //cerr << "takeoff " << name << endl;
 397             }
 398         }
 399         //cerr << endl;
 400     }
 401
 402     if (action == 1)            // takeoff
 403     {
 404         int nr = takeoff.size();
 405         if (nr) {
 406             // Note that the randomization below, is just a placeholder to choose between
 407             // multiple active runways for this action. This should be
 408             // under ATC control.
 409             runway = chooseRwyByHeading(takeoff, heading);
 410         } else {                // Fallback
 411             runway = chooseRunwayFallback();
 412         }
 413     }
 414
 415     if (action == 2)            // landing
 416     {
 417         int nr = landing.size();
 418         if (nr) {
 419             runway = chooseRwyByHeading(landing, heading);
 420         } else {                //fallback
 421             runway = chooseRunwayFallback();
 422         }
 423     }
 424
 425     return true;
 426 }
 427
 428 string FGAirportDynamics::chooseRwyByHeading(stringVec rwys,
 429                                              double heading)
 430 {
 431     double bestError = 360.0;
 432     double rwyHeading, headingError;
 433     string runway;
 434     for (stringVecIterator i = rwys.begin(); i != rwys.end(); i++) {
 435         FGRunway *rwy = _ap->getRunwayByIdent((*i));
 436         rwyHeading = rwy->headingDeg();
 437         headingError = fabs(heading - rwyHeading);
 438         if (headingError > 180)
 439             headingError = fabs(headingError - 360);
 440         if (headingError < bestError) {
 441             runway = (*i);
 442             bestError = headingError;
 443         }
 444     }
 445     //cerr << "Using active runway " << runway << " for heading " << heading << endl;
 446     return runway;
 447 }
 448
 449 void FGAirportDynamics::getActiveRunway(const string & trafficType,
 450                                         int action, string & runway,
 451                                         double heading)
 452 {
 453     bool ok = innerGetActiveRunway(trafficType, action, runway, heading);
 454     if (!ok) {
 455         runway = chooseRunwayFallback();
 456     }
 457 }
 458
 459 string FGAirportDynamics::chooseRunwayFallback()
 460 {
 461     FGRunway *rwy = _ap->getActiveRunwayForUsage();
 462     return rwy->ident();
 463 }
 464
 465 void FGAirportDynamics::addParking(FGParking & park)
 466 {
 467     parkings.push_back(park);
 468 }
 469
 470 double FGAirportDynamics::getLatitude() const
 471 {
 472     return _ap->getLatitude();
 473 }
 474
 475 double FGAirportDynamics::getLongitude() const
 476 {
 477     return _ap->getLongitude();
 478 }
 479
 480 double FGAirportDynamics::getElevation() const
 481 {
 482     return _ap->getElevation();
 483 }
 484
 485 const string & FGAirportDynamics::getId() const
 486 {
 487     return _ap->getId();
 488 }
 489
 490 // Experimental: Return a different ground frequency depending on the leg of the
 491 // Flight. Leg should always have a minimum value of two when this function is called.
 492 // Note that in this scheme, the assignment of various frequencies to various ground
 493 // operations is completely arbitrary. As such, is a short cut I need to take now,
 494 // so that at least I can start working on assigning different frequencies to different
 495 // operations.
 496
 497 int FGAirportDynamics::getGroundFrequency(unsigned leg)
 498 {
 499     //return freqGround.size() ? freqGround[0] : 0; };
 500     int groundFreq = 0;
 501     if (leg < 2) {
 502         SG_LOG(SG_ATC, SG_ALERT,
 503                "Leg value is smaller than two at " << SG_ORIGIN);
 504     }
 505     if (freqGround.size() == 0) {
 506         return 0;
 507     }
 508     if ((freqGround.size() > leg - 1) && (leg > 1)) {
 509         groundFreq = freqGround[leg - 1];
 510     }
 511     if ((freqGround.size() < leg - 1) && (leg > 1)) {
 512         groundFreq =
 513             (freqGround.size() <
 514              (leg - 1)) ? freqGround[freqGround.size() -
 515                                      1] : freqGround[leg - 2];
 516     }
 517     if ((freqGround.size() >= leg - 1) && (leg > 1)) {
 518         groundFreq = freqGround[leg - 2];
 519     }
 520     return groundFreq;
 521 }
 522
 523 FGAIFlightPlan *FGAirportDynamics::getSID(string activeRunway,
 524                                           double heading)
 525 {
 526     return SIDs.getBest(activeRunway, heading);
 527 }