src/AIModel/AIFlightPlanCreatePushBack.cxx

   1 /****************************************************************************
   2 * AIFlightPlanCreatePushBack.cxx
   3 * Written by Durk Talsma, started August 1, 2007.
   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 **************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 #  include <config.h>
  23 #endif
  24
  25 #include <simgear/math/sg_geodesy.hxx>
  26
  27 #include <Airports/simple.hxx>
  28 #include <Airports/runways.hxx>
  29 #include <Airports/dynamics.hxx>
  30
  31 #include <Environment/environment_mgr.hxx>
  32 #include <Environment/environment.hxx>
  33
  34 #include "AIFlightPlan.hxx"
  35 #include "AIAircraft.hxx"
  36 #include "performancedata.hxx"
  37
  38
  39 // TODO: Use James Turner's createOnGround functions.
  40 bool FGAIFlightPlan::createPushBack(FGAIAircraft *ac,
  41                                     bool firstFlight, FGAirport *dep,
  42                                     double latitude,
  43                                     double longitude,
  44                                     double radius,
  45                                     const string& fltType,
  46                                     const string& aircraftType,
  47                                     const string& airline)
  48 {
  49     double lat, lon, heading;
  50     double vTaxi = ac->getPerformance()->vTaxi();
  51     double vTaxiBackward = vTaxi * (-2.0/3.0);
  52     double vTaxiReduced  = vTaxi * (2.0/3.0);
  53     FGTaxiRoute *pushBackRoute;
  54     // Active runway can be conditionally set by ATC, so at the start of a new flight, this
  55     // must be reset.
  56     activeRunway.clear();
  57
  58     if (!(dep->getDynamics()->getGroundNetwork()->exists())) {
  59         //cerr << "Push Back fallback" << endl;
  60         createPushBackFallBack(ac, firstFlight, dep, latitude, longitude,
  61                                radius, fltType, aircraftType, airline);
  62     } else {
  63         if (firstFlight) {
  64
  65             if (!(dep->getDynamics()->getAvailableParking(&lat, &lon,
  66                     &heading, &gateId,
  67                     radius, fltType,
  68                     aircraftType, airline))) {
  69                 SG_LOG(SG_INPUT, SG_WARN, "Warning: Could not find parking for a " <<
  70                        aircraftType <<
  71                        " of flight type " << fltType <<
  72                        " of airline     " << airline <<
  73                        " at airport     " << dep->getId());
  74                 return false;
  75                 char buffer[10];
  76                 snprintf (buffer, 10, "%d", gateId);
  77                 SGGeod coord = coord.fromDeg(lon, lat);
  78                 //FGTaxiNode *tn = dep->getDynamics()->getGroundNetwork()->findNode(node);
  79                 FGAIWaypoint *wpt = createOnGround(ac, string(buffer), coord, dep->getElevation(), vTaxiBackward);
  80                 wpt->setRouteIndex(-1);
  81                 pushBackWaypoint(wpt);
  82             }
  83             //cerr << "Success : GateId = " << gateId << endl;
  84             SG_LOG(SG_INPUT, SG_WARN, "Warning: Succesfully found a parking for a " <<
  85                    aircraftType <<
  86                    " of flight type " << fltType <<
  87                    " of airline     " << airline <<
  88                    " at airport     " << dep->getId());
  89         } else {
  90             //cerr << "Push Back follow-up Flight" << endl;
  91             dep->getDynamics()->getParking(gateId, &lat, &lon, &heading);
  92         }
  93         if (gateId < 0) {
  94             createPushBackFallBack(ac, firstFlight, dep, latitude, longitude,
  95                                    radius, fltType, aircraftType, airline);
  96             return true;
  97
  98         }
  99         //cerr << "getting parking " << gateId;
 100         //cerr << " for a " <<
 101         //                                      aircraftType <<
 102         //                                      " of flight type " << fltType <<
 103         //                                      " of airline     " << airline <<
 104         //                                      " at airport     " << dep->getId() << endl;
 105         FGParking *parking = dep->getDynamics()->getParking(gateId);
 106         int pushBackNode = parking->getPushBackPoint();
 107
 108
 109         pushBackRoute = parking->getPushBackRoute();
 110         if ((pushBackNode > 0) && (pushBackRoute == 0)) {  // Load the already established route for this gate
 111             int node, rte;
 112             FGTaxiRoute route;
 113             //cerr << "Creating push-back for " << gateId << " (" << parking->getName() << ") using push-back point " << pushBackNode << endl;
 114             route = dep->getDynamics()->getGroundNetwork()->findShortestRoute(gateId, pushBackNode, false);
 115             parking->setPushBackRoute(new FGTaxiRoute(route));
 116
 117
 118             pushBackRoute = parking->getPushBackRoute();
 119             int size = pushBackRoute->size();
 120             if (size < 2) {
 121                 SG_LOG(SG_GENERAL, SG_WARN, "Push back route from gate " << gateId << " has only " << size << " nodes.");
 122                 SG_LOG(SG_GENERAL, SG_WARN, "Using  " << pushBackNode);
 123             }
 124             pushBackRoute->first();
 125             while (pushBackRoute->next(&node, &rte))
 126             {
 127                 //FGTaxiNode *tn = apt->getDynamics()->getGroundNetwork()->findSegment(node)->getEnd();
 128                 char buffer[10];
 129                 snprintf (buffer, 10, "%d", node);
 130                 FGTaxiNode *tn = dep->getDynamics()->getGroundNetwork()->findNode(node);
 131                 //ids.pop_back();
 132                 //wpt = new waypoint;
 133                 SGGeod coord = coord.fromDeg(tn->getLongitude(), tn->getLatitude());
 134                 FGAIWaypoint *wpt = createOnGround(ac, string(buffer), coord, dep->getElevation(), vTaxiBackward);
 135
 136                 wpt->setRouteIndex(rte);
 137                 pushBackWaypoint(wpt);
 138             }
 139             // some special considerations for the last point:
 140             waypoints.back()->setName(string("PushBackPoint"));
 141             waypoints.back()->setSpeed(vTaxi);
 142             ac->setTaxiClearanceRequest(true);
 143         } else {  // In case of a push forward departure...
 144             ac->setTaxiClearanceRequest(false);
 145             double lat2 = 0.0, lon2 = 0.0, az2 = 0.0;
 146
 147             //cerr << "Creating final push forward point for gate " << gateId << endl;
 148             FGTaxiNode *tn = dep->getDynamics()->getGroundNetwork()->findNode(gateId);
 149             FGTaxiSegmentVectorIterator ts = tn->getBeginRoute();
 150             FGTaxiSegmentVectorIterator te = tn->getEndRoute();
 151             // if the starting node equals the ending node, then there aren't any routes for this parking.
 152             // in cases like these we should flag the gate as being inoperative and return false
 153             if (ts == te) {
 154                 SG_LOG(SG_GENERAL, SG_ALERT, "Gate " << gateId << "doesn't seem to have routes associated with it.");
 155                 parking->setAvailable(false);
 156                 return false;
 157             }
 158             tn = (*ts)->getEnd();
 159             lastNodeVisited = tn->getIndex();
 160             if (tn == NULL) {
 161                 SG_LOG(SG_GENERAL, SG_ALERT, "No valid taxinode found");
 162                 exit(1);
 163             }
 164             double distance = (*ts)->getLength();
 165             //cerr << "Length of push forward route = " << distance << " and heading is " << heading << endl;
 166             lat2 =  tn->getLatitude();
 167             lon2 =  tn->getLongitude();
 168
 169             for (int i = 1; i < 10; i++) {
 170                 geo_direct_wgs_84 ( 0, lat, lon, heading,
 171                                     ((i / 10.0) * distance), &lat2, &lon2, &az2 );
 172                 char buffer[16];
 173                 snprintf(buffer, 16, "pushback-%02d", i);
 174                 SGGeod coord = coord.fromDeg(lon2, lat2);
 175                 //cerr << i << endl;
 176                 FGAIWaypoint *wpt = createOnGround(ac, string(buffer), coord, dep->getElevation(), vTaxiReduced);
 177
 178                 wpt->setRouteIndex((*ts)->getIndex());
 179                 pushBackWaypoint(wpt);
 180             }
 181             // cerr << "Done " << endl;
 182             waypoints.back()->setName(string("PushBackPoint"));
 183             // cerr << "Done assinging new name" << endl;
 184         }
 185     }
 186     return true;
 187 }
 188 /*******************************************************************
 189 * createPushBackFallBack
 190 * This is the backup function for airports that don't have a
 191 * network yet.
 192 ******************************************************************/
 193 void FGAIFlightPlan::createPushBackFallBack(FGAIAircraft *ac, bool firstFlight, FGAirport *dep,
 194         double latitude,
 195         double longitude,
 196         double radius,
 197         const string& fltType,
 198         const string& aircraftType,
 199         const string& airline)
 200 {
 201     double heading;
 202     double lat;
 203     double lon;
 204     double lat2 = 0.0;
 205     double lon2 = 0.0;
 206     double az2 = 0.0;
 207
 208     double vTaxi = ac->getPerformance()->vTaxi();
 209     double vTaxiBackward = vTaxi * (-2.0/3.0);
 210     double vTaxiReduced  = vTaxi * (2.0/3.0);
 211
 212
 213
 214     dep->getDynamics()->getParking(-1, &lat, &lon, &heading);
 215
 216     heading += 180.0;
 217     if (heading > 360)
 218         heading -= 360;
 219
 220     SGGeod coord = coord.fromDeg(lon, lat);
 221     FGAIWaypoint *wpt = createOnGround(ac, string("park"), coord, dep->getElevation(), vTaxiBackward);
 222
 223     pushBackWaypoint(wpt);
 224
 225     geo_direct_wgs_84 ( 0, lat, lon, heading,
 226                         10,
 227                         &lat2, &lon2, &az2 );
 228     coord = coord.fromDeg(lon2, lat2);
 229     wpt = createOnGround(ac, string("park2"), coord, dep->getElevation(), vTaxiBackward);
 230
 231     pushBackWaypoint(wpt);
 232
 233     geo_direct_wgs_84 ( 0, lat, lon, heading,
 234                         2.2*radius,
 235                         &lat2, &lon2, &az2 );
 236     coord = coord.fromDeg(lon2, lat2);
 237     wpt = createOnGround(ac, string("taxiStart"), coord, dep->getElevation(), vTaxiReduced);
 238     pushBackWaypoint(wpt);
 239
 240 }