src/ATC/AIGAVFRTraffic.cxx

   1 // FGAILocalTraffic - AIEntity derived class with enough logic to
   2 // fly and interact with the traffic pattern.
   3 //
   4 // Written by David Luff, started March 2002.
   5 //
   6 // Copyright (C) 2002  David C. Luff - david.luff@nottingham.ac.uk
   7 //
   8 // This program is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU General Public License as
  10 // published by the Free Software Foundation; either version 2 of the
  11 // License, or (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful, but
  14 // WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22 #ifdef HAVE_CONFIG_H
  23 #  include <config.h>
  24 #endif
  25
  26 //#include <simgear/scene/model/location.hxx>
  27
  28 #include <Airports/runways.hxx>
  29 #include <Main/globals.hxx>
  30 //#include <Scenery/scenery.hxx>
  31 //#include <Scenery/tilemgr.hxx>
  32 #include <simgear/math/point3d.hxx>
  33 //#include <simgear/math/sg_geodesy.hxx>
  34 //#include <simgear/misc/sg_path.hxx>
  35 #include <string>
  36 #include <math.h>
  37
  38 SG_USING_STD(string);
  39
  40 #include "ATCmgr.hxx"
  41 #include "AILocalTraffic.hxx"
  42 #include "AIGAVFRTraffic.hxx"
  43 #include "ATCutils.hxx"
  44
  45 FGAIGAVFRTraffic::FGAIGAVFRTraffic() {
  46         ATC = globals->get_ATC_mgr();
  47         _towerContactedIncoming = false;
  48         _clearedStraightIn = false;
  49         _clearedDownwindEntry = false;
  50         _incoming = false;
  51         _straightIn = false;
  52         _downwindEntry = false;
  53         _climbout = false;
  54         _local = false;
  55         _established = false;
  56         _e45 = false;
  57         _entering = false;
  58         _turning = false;
  59         _cruise_climb_ias = 90.0;
  60         _cruise_ias = 110.0;
  61         patternDirection = -1.0;
  62
  63         // TESTING - REMOVE OR COMMENT OUT BEFORE COMMIT!!!
  64         //_towerContactPrinted = false;
  65 }
  66
  67 FGAIGAVFRTraffic::~FGAIGAVFRTraffic() {
  68 }
  69
  70 // We should never need to Init FGAIGAVFRTraffic in the pattern since that implies arrivel
  71 // and we can just use an FGAILocalTraffic instance for that instead.
  72
  73 // Init en-route to destID at point pt.
  74 // TODO - no idea what to do if pt is above planes ceiling due mountains!!
  75 bool FGAIGAVFRTraffic::Init(Point3D pt, string destID, const string& callsign) {
  76         FGAILocalTraffic::Init(callsign, destID, EN_ROUTE);
  77         // TODO FIXME - to get up and running we're going to ignore elev and get FGAIMgr to
  78         // pass in known good values for the test location.  Need to fix this!!! (or at least canonically decide who has responsibility for setting elev).
  79         _enroute = true;
  80         _destID = destID;
  81         _pos = pt;
  82         _destPos = dclGetAirportPos(destID);    // TODO - check if we are within the tower catchment area already.
  83         _cruise_alt = (_destPos.elev() + 2500.0) * SG_FEET_TO_METER;    // TODO look at terrain elevation as well
  84         _pos.setelev(_cruise_alt);
  85         // initially set waypoint as airport location
  86         _wp = _destPos;
  87         // Set the initial track
  88         track = GetHeadingFromTo(_pos, _wp);
  89         // And set the plane to keep following it.
  90         SetTrack(GetHeadingFromTo(_pos, _wp));
  91         _roll = 0.0;
  92         _pitch = 0.0;
  93         slope = 0.0;
  94         // TODO - set climbout if altitude is below normal cruising altitude?
  95         //Transform();
  96         // Assume it's OK to set the plane visible
  97         _aip.setVisible(true);
  98         //cout << "Setting visible true\n";
  99         Transform();
 100         return(true);
 101 }
 102
 103 // Init at srcID to fly to destID
 104 bool FGAIGAVFRTraffic::Init(string srcID, string destID, const string& callsign, OperatingState state) {
 105         _enroute = false;
 106         FGAILocalTraffic::Init(callsign, srcID, PARKED);
 107         return(true);
 108 }
 109
 110 void FGAIGAVFRTraffic::Update(double dt) {
 111         if(_enroute) {
 112                 //cout << "_enroute\n";
 113                 //cout << "e" << flush;
 114                 FlyPlane(dt);
 115                 //cout << "f" << flush;
 116                 Transform();
 117                 //cout << "g" << flush;
 118                 FGAIPlane::Update(dt);
 119                 //cout << "h" << flush;
 120                 responseCounter += dt;
 121
 122                 // we shouldn't really need this since there's a LOD of 10K on the whole plane anyway I think.
 123                 // There are two _aip.setVisible statements set when _local = true that can be removed if the below is removed.
 124                 if(dclGetHorizontalSeparation(_pos, Point3D(fgGetDouble("/position/longitude-deg"), fgGetDouble("/position/latitude-deg"), 0.0)) > 8000) _aip.setVisible(false);
 125                 else _aip.setVisible(true);
 126
 127         } else if(_local) {
 128                 //cout << "L";
 129                 //cout << "_local\n";
 130                 FGAILocalTraffic::Update(dt);
 131         }
 132 }
 133
 134 void FGAIGAVFRTraffic::FlyPlane(double dt) {
 135         if(_climbout) {
 136                 // Check whether to level off
 137                 if(_pos.elev() >= _cruise_alt) {
 138                         slope = 0.0;
 139                         _pitch = 0.0;
 140                         IAS = _cruise_ias;              // FIXME - use smooth transistion to new speed and attitude.
 141                         _climbout = false;
 142                 } else {
 143                         slope = 4.0;
 144                         _pitch = 5.0;
 145                         IAS = _cruise_climb_ias;
 146                 }
 147         } else {
 148                 // TESTING
 149                 /*
 150                 if(dclGetHorizontalSeparation(_destPos, _pos) / 1600.0 < 8.1) {
 151                         if(!_towerContactPrinted) {
 152                                 if(airportID == "KSQL") {
 153                                         cout << "****************************************************************\n";
 154                                         cout << "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n";
 155                                         cout << "****************************************************************\n";
 156                                 }
 157                                 _towerContactPrinted = true;
 158                         }
 159                 }
 160                 */
 161
 162                 // if distance to destination is less than 6 - 9 miles contact tower
 163                 // and prepare to become _incoming after response.
 164                 // Possibly check whether to start descent before this?
 165                 //cout << "." << flush;
 166                 //cout << "sep = " << dclGetHorizontalSeparation(_destPos, _pos) / 1600.0 << '\n';
 167                 if(dclGetHorizontalSeparation(_destPos, _pos) / 1600.0 < 8.0) {
 168                         //cout << "-" << flush;
 169                         if(!_towerContactedIncoming) {
 170                                 //cout << "_" << flush;
 171                                 GetAirportDetails(airportID);
 172                                 //cout << "L" << flush;
 173                                 // TODO FIXME TODO - need to check that tower is valid before this else if problem -> BOOM!
 174                                 freq = (double)tower->get_freq() / 100.0;
 175                                 tuned_station = tower;
 176                                 //cout << "freq = " << freq << endl;
 177                                 GetRwyDetails(airportID);
 178                                 //"@AP Tower @CS @MI miles @CD of the airport for full stop with the ATIS"
 179                                 // At the bare minimum we ought to make sure it goes the right way at dual parallel rwy airports!
 180                                 if(rwy.rwyID.size() == 3) {
 181                                         patternDirection = (rwy.rwyID.substr(2,1) == "R" ? 1 : -1);
 182                                 }
 183                                 pending_transmission = tower->get_name();
 184                                 pending_transmission += " Tower ";
 185                                 pending_transmission += plane.callsign;
 186                                 //char buf[10];
 187                                 int dist_miles = (int)dclGetHorizontalSeparation(_pos, _destPos) / 1600;
 188                                 //sprintf(buf, " %i ", dist_miles);
 189                                 pending_transmission += " ";
 190                                 pending_transmission += ConvertNumToSpokenDigits(dist_miles);
 191                                 if(dist_miles > 1) pending_transmission += " miles ";
 192                                 else pending_transmission += " mile ";
 193                                 pending_transmission += GetCompassDirection(GetHeadingFromTo(_destPos, _pos));
 194                                 pending_transmission += " of the airport for full stop with the ATIS";
 195                                 //cout << pending_transmission << endl;
 196                                 Transmit(14);   // 14 is the callback code, NOT the timeout!
 197                                 responseCounter = 0;
 198                                 _towerContactedIncoming = true;
 199                         } else {
 200                                 //cout << "?" << flush;
 201                                 if(_clearedStraightIn && responseCounter > 5.5) {
 202                                         //cout << "5 " << flush;
 203                                         _clearedStraightIn = false;
 204                                         _straightIn = true;
 205                                         _incoming = true;
 206                                         _wp = GetPatternApproachPos();
 207                                         //_hdg = GetHeadingFromTo(_pos, _wp);   // TODO - turn properly!
 208                                         SetTrack(GetHeadingFromTo(_pos, _wp));
 209                                         slope = atan((_wp.elev() - _pos.elev()) / dclGetHorizontalSeparation(_wp, _pos)) * DCL_RADIANS_TO_DEGREES;
 210                                         double thesh_offset = 0.0;
 211                                         Point3D opos = ortho.ConvertToLocal(_pos);
 212                                         double angToApt = atan((_pos.elev() - dclGetAirportElev(airportID)) / (opos.y() - thesh_offset)) * DCL_RADIANS_TO_DEGREES;
 213                                         //cout << "angToApt = " << angToApt << ' ';
 214                                         slope = (angToApt > -5.0 ? 0.0 : angToApt);
 215                                         //cout << "slope = " << slope << '\n';
 216                                         pending_transmission = "Straight-in ";
 217                                         pending_transmission += ConvertRwyNumToSpokenString(rwy.rwyID);
 218                                         pending_transmission += " ";
 219                                         pending_transmission += plane.callsign;
 220                                         //cout << pending_transmission << '\n';
 221                                         ConditionalTransmit(4);
 222                                 } else if(_clearedDownwindEntry && responseCounter > 5.5) {
 223                                         //cout << "6" << flush;
 224                                         _clearedDownwindEntry = false;
 225                                         _downwindEntry = true;
 226                                         _incoming = true;
 227                                         _wp = GetPatternApproachPos();
 228                                         SetTrack(GetHeadingFromTo(_pos, _wp));
 229                                         slope = atan((_wp.elev() - _pos.elev()) / dclGetHorizontalSeparation(_wp, _pos)) * DCL_RADIANS_TO_DEGREES;
 230                                         //cout << "slope = " << slope << '\n';
 231                                         pending_transmission = "Report ";
 232                                         pending_transmission += (patternDirection == 1 ? "right downwind " : "left downwind ");
 233                                         pending_transmission += ConvertRwyNumToSpokenString(rwy.rwyID);
 234                                         pending_transmission += " ";
 235                                         pending_transmission += plane.callsign;
 236                                         //cout << pending_transmission << '\n';
 237                                         ConditionalTransmit(4);
 238                                 }
 239                         }
 240                         if(_pos.elev() < (dclGetAirportElev(airportID) + (1000.0 * SG_FEET_TO_METER))) slope = 0.0;
 241                 }
 242         }
 243         if(_incoming) {
 244                 //cout << "i" << '\n';
 245                 Point3D orthopos = ortho.ConvertToLocal(_pos);
 246                 // TODO - Check whether to start descent
 247                 // become _local after the 3 mile report.
 248                 if(_pos.elev() < (dclGetAirportElev(airportID) + (1000.0 * SG_FEET_TO_METER))) slope = 0.0;
 249                 // TODO - work out why I needed to add the above line to stop the plane going underground!!!
 250                 // (Although it's worth leaving it in as a robustness check anyway).
 251                 if(_straightIn) {
 252                         //cout << "A " << flush;
 253                         if(fabs(orthopos.x()) < 10.0 && !_established) {
 254                                 SetTrack(rwy.hdg);
 255                                 _established = true;
 256                                 //cout << "Established at " << orthopos << '\n';
 257                         }
 258                         double thesh_offset = 30.0;
 259                         //cout << "orthopos.y = " << orthopos.y() << " alt = " << _pos.elev() - dclGetAirportElev(airportID) << '\n';
 260                         if(_established && (orthopos.y() > -5400.0)) {
 261                                 slope = atan((_pos.elev() - dclGetAirportElev(airportID)) / (orthopos.y() - thesh_offset)) * DCL_RADIANS_TO_DEGREES;
 262                                 //cout << "slope0 = " << slope << '\n';
 263                         }
 264                         //cout << "slope1 = " << slope << '\n';
 265                         if(slope > -5.5) slope = 0.0;   // ie we're too low.
 266                         //cout << "slope2 = " << slope << '\n';
 267                         slope += 0.001;         // To avoid yo-yoing with the above.
 268                         //if(_established && (orthopos.y() > -5400.0)) slope = -5.5;
 269                         if(_established && (orthopos.y() > -4800.0)) {
 270                                 pending_transmission = "3 mile final Runway ";
 271                                 pending_transmission += ConvertRwyNumToSpokenString(rwy.rwyID);
 272                                 pending_transmission += " ";
 273                                 pending_transmission += plane.callsign;
 274                                 //cout << pending_transmission << '\n';
 275                                 ConditionalTransmit(35);
 276                                 _local = true;
 277                                 _aip.setVisible(true);  // HACK
 278                                 _enroute = false;
 279                                 StraightInEntry(true);
 280                         }
 281                 } else if(_downwindEntry) {
 282                         //cout << "B" << flush;
 283                         if(_entering) {
 284                                 //cout << "C" << flush;
 285                                 if(_turning) {
 286                                         if(fabs(_hdg - (rwy.hdg + 180)) < 2.0) {        // TODO - use track instead of _hdg?
 287                                                 //cout << "Going Local...\n";
 288                                                 leg = DOWNWIND;
 289                                                 _local = true;
 290                                                 _aip.setVisible(true);  // HACK
 291                                                 _enroute = false;
 292                                                 _entering = false;
 293                                                 _turning = false;
 294                                                 DownwindEntry();
 295                                         }
 296                                 }
 297                                 if(fabs(orthopos.x() - (patternDirection == 1 ? 1000 : -1000)) < (_e45 ? 175 : 550)) {  // Caution - hardwired turn clearances.
 298                                         //cout << "_turning...\n";
 299                                         _turning = true;
 300                                         SetTrack(rwy.hdg + 180.0);
 301                                 }       // TODO - need to check for other traffic in the pattern and enter much more integilently than that!!!
 302                         } else {
 303                                 //cout << "D" << flush;
 304                                 //cout << '\n' << dclGetHorizontalSeparation(_wp, _pos) << '\n';
 305                                 //cout << ortho.ConvertToLocal(_pos);
 306                                 //cout << ortho.ConvertToLocal(_wp);
 307                                 if(dclGetHorizontalSeparation(_wp, _pos) < 100.0) {
 308                                         pending_transmission = "2 miles out for ";
 309                                         pending_transmission += (patternDirection == 1 ? "right " : "left ");
 310                                         pending_transmission += "downwind Runway ";
 311                                         pending_transmission += ConvertRwyNumToSpokenString(rwy.rwyID);
 312                                         pending_transmission += " ";
 313                                         pending_transmission += plane.callsign;
 314                                         //cout << pending_transmission << '\n';
 315                                         // TODO - are we at pattern altitude??
 316                                         slope = 0.0;
 317                                         ConditionalTransmit(30);
 318                                         if(_e45) {
 319                                                 SetTrack(patternDirection == 1 ? rwy.hdg - 135.0 : rwy.hdg + 135.0);
 320                                         } else {
 321                                                 SetTrack(patternDirection == 1 ? rwy.hdg + 90.0 : rwy.hdg - 90.0);
 322                                         }
 323                                         //if(_hdg < 0.0) _hdg += 360.0;
 324                                         _entering = true;
 325                                 } else {
 326                                         SetTrack(GetHeadingFromTo(_pos, _wp));
 327                                 }
 328                         }
 329                 }
 330         } else {
 331                 // !_incoming
 332                 slope = 0.0;
 333         }
 334         // FIXME - lots of hackery in the next six lines!!!!
 335         //double track = _hdg;
 336         double crab = 0.0;      // This is a placeholder for when we take wind into account.
 337         _hdg = track + crab;
 338         double vel = _cruise_ias;
 339         double dist = vel * 0.514444 * dt;
 340         _pos = dclUpdatePosition(_pos, track, slope, dist);
 341 }
 342
 343 void FGAIGAVFRTraffic::RegisterTransmission(int code) {
 344         switch(code) {
 345         case 1: // taxi request cleared
 346                 FGAILocalTraffic::RegisterTransmission(code);
 347                 break;
 348         case 2: // contact tower
 349                 FGAILocalTraffic::RegisterTransmission(code);
 350                 break;
 351         case 3: // Cleared to line up
 352                 FGAILocalTraffic::RegisterTransmission(code);
 353                 break;
 354         case 4: // cleared to take-off
 355                 FGAILocalTraffic::RegisterTransmission(code);
 356                 break;
 357         case 5: // contact ground
 358                 FGAILocalTraffic::RegisterTransmission(code);
 359                 break;
 360         case 6: // taxi to the GA parking
 361                 FGAILocalTraffic::RegisterTransmission(code);
 362                 break;
 363         case 7: // Cleared to land
 364                 FGAILocalTraffic::RegisterTransmission(code);
 365                 break;
 366         case 13: // Go around!
 367                 FGAILocalTraffic::RegisterTransmission(code);
 368                 break;
 369         case 14: // VFR approach for straight-in
 370                 responseCounter = 0;
 371                 _clearedStraightIn = true;
 372                 break;
 373         case 15: // VFR approach for downwind entry
 374                 responseCounter = 0;
 375                 _clearedDownwindEntry = true;
 376                 break;
 377         default:
 378                 break;
 379         }
 380 }
 381
 382 // Callback handler
 383 // TODO - Really should enumerate these coded values.
 384 void FGAIGAVFRTraffic::ProcessCallback(int code) {
 385         // 1 - Request Departure from ground
 386         // 2 - Report at hold short
 387         // 10 - report crosswind
 388         // 11 - report downwind
 389         // 12 - report base
 390         // 13 - report final
 391         // 14 - Contact Tower for VFR arrival
 392         if(code < 14) {
 393                 FGAILocalTraffic::ProcessCallback(code);
 394         } else if(code == 14) {
 395                 tower->VFRArrivalContact(plane, this, FULL_STOP);
 396         }
 397 }
 398
 399 // Return an appropriate altitude to fly at based on the desired altitude and direction
 400 // whilst respecting the quadrangle rule.
 401 int FGAIGAVFRTraffic::GetQuadrangleAltitude(int dir, int des_alt) {
 402         return(8888);
 403         // TODO - implement me!
 404 }
 405
 406 // Calculates the position needed to set up for either pattern entry or straight in approach.
 407 // Currently returns one of three positions dependent on initial position wrt threshold of active rwy.
 408 // 1/ A few miles out on extended centreline for straight-in.
 409 // 2/ At an appropriate point on circuit side of rwy for a 45deg entry to downwind.
 410 // 3/ At and appropriate point on non-circuit side of rwy at take-off end for perpendicular entry to circuit overflying end-of-rwy.
 411 Point3D FGAIGAVFRTraffic::GetPatternApproachPos() {
 412         //cout << "\n\n";
 413         //cout << "Calculating pattern approach pos for " << plane.callsign << '\n';
 414         Point3D orthopos = ortho.ConvertToLocal(_pos);
 415         Point3D tmp;
 416         //cout << "patternDirection = " << patternDirection << '\n';
 417         if(orthopos.y() >= -1000.0) {   // Note that this has to be set the same as the calculation in tower.cxx - at the moment approach type is not transmitted properly between the two.
 418                 //cout << "orthopos.x = " << orthopos.x() << '\n';
 419                 if((orthopos.x() * patternDirection) > 0.0) {   // 45 deg entry
 420                         tmp.setx(2000 * patternDirection);
 421                         tmp.sety((rwy.end2ortho.y() / 2.0) + 2000);
 422                         tmp.setelev(dclGetAirportElev(airportID) + (1000 * SG_FEET_TO_METER));
 423                         _e45 = true;
 424                         //cout << "45 deg entry... ";
 425                 } else {
 426                         tmp.setx(1000 * patternDirection * -1);
 427                         tmp.sety(rwy.end2ortho.y());
 428                         tmp.setelev(dclGetAirportElev(airportID) + (1000 * SG_FEET_TO_METER));
 429                         _e45 = false;
 430                         //cout << "90 deg entry... ";
 431                 }
 432         } else {
 433                 tmp.setx(0);
 434                 tmp.sety(-5400);
 435                 tmp.setelev((5400.0 / 6.0) + dclGetAirportElev(airportID) + 10.0);
 436                 //cout << "Straight in... ";
 437         }
 438         //cout << "Waypoint is " << tmp << '\n';
 439         //cout << ortho.ConvertFromLocal(tmp) << '\n';
 440         //cout << '\n';
 441         //exit(-1);
 442         return ortho.ConvertFromLocal(tmp);
 443 }
 444
 445 //FGAIGAVFRTraffic::
 446
 447 //FGAIGAVFRTraffic::
 448
 449 //FGAIGAVFRTraffic::