1 /******************************************************************************
3 * Written by Durk Talsma, started May 5, 2004.
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.
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.
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.
20 **************************************************************************/
22 /* This a prototype version of a top-level flight plan manager for Flightgear.
23 * It parses the fgtraffic.txt file and determine for a specific time/date,
24 * where each aircraft listed in this file is at the current time.
26 * I'm currently assuming the following simplifications:
27 * 1) The earth is a perfect sphere
28 * 2) Each aircraft flies a perfect great circle route.
29 * 3) Each aircraft flies at a constant speed (with infinite accelerations and
31 * 4) Each aircraft leaves at exactly the departure time.
32 * 5) Each aircraft arrives at exactly the specified arrival time.
35 * - Check the code for known portability issues
37 *****************************************************************************/
52 #include <simgear/compiler.h>
53 #include <simgear/props/props.hxx>
54 #include <simgear/route/waypoint.hxx>
55 #include <simgear/structure/subsystem_mgr.hxx>
56 #include <simgear/timing/sg_time.hxx>
57 #include <simgear/xml/easyxml.hxx>
59 #include <AIModel/AIFlightPlan.hxx>
60 #include <AIModel/AIManager.hxx>
61 #include <Airports/simple.hxx>
62 #include <Main/fg_init.hxx> // That's pretty ugly, but I need fgFindAirportID
66 #include <Main/globals.hxx>
68 #include "SchedFlight.hxx"
71 /******************************************************************************
72 * FGScheduledFlight stuff
73 *****************************************************************************/
75 FGScheduledFlight::FGScheduledFlight()
85 FGScheduledFlight::FGScheduledFlight(const FGScheduledFlight &other)
87 callsign = other.callsign;
88 fltRules = other.fltRules;
89 departurePort = other.departurePort;
92 departureTime = other.departureTime;
93 cruiseAltitude = other.cruiseAltitude;
94 arrivalPort = other.arrivalPort;
95 arrivalTime = other.arrivalTime;
96 repeatPeriod = other.repeatPeriod;
97 initialized = other.initialized;
98 requiredAircraft = other.requiredAircraft;
99 available = other.available;
102 FGScheduledFlight::FGScheduledFlight(const string& cs,
104 const string& depPrt,
105 const string& arrPrt,
107 const string& deptime,
108 const string& arrtime,
114 //departurePort.setId(depPrt);
115 //arrivalPort.setId(arrPrt);
118 //cerr << "Constructor: departure " << depId << ". arrival " << arrId << endl;
119 //departureTime = processTimeString(deptime);
120 //arrivalTime = processTimeString(arrtime);
121 cruiseAltitude = cruiseAlt;
122 requiredAircraft = reqAC;
124 // Process the repeat period string
125 if (rep.find("WEEK",0) != string::npos)
127 repeatPeriod = 7*24*60*60; // in seconds
129 else if (rep.find("Hr", 0) != string::npos)
131 repeatPeriod = 60*60*atoi(rep.substr(0,2).c_str());
135 repeatPeriod = 365*24*60*60;
136 SG_LOG( SG_GENERAL, SG_ALERT, "Unknown repeat period in flight plan "
137 "of flight '" << cs << "': " << rep );
140 // What we still need to do is preprocess the departure and
142 departureTime = processTimeString(deptime);
143 arrivalTime = processTimeString(arrtime);
144 //departureTime += rand() % 300; // Make sure departure times are not limited to 5 minute increments.
145 if (departureTime > arrivalTime)
147 departureTime -= repeatPeriod;
154 FGScheduledFlight:: ~FGScheduledFlight()
158 time_t FGScheduledFlight::processTimeString(const string& theTime)
161 int timeOffsetInDays;
167 SGTime* currTimeDate = globals->get_time_params();
169 string timeCopy = theTime;
172 // okay first split theTime string into
173 // weekday, hour, minute, second;
174 // Check if a week day is specified
175 if (timeCopy.find("/",0) != string::npos)
177 weekday = atoi(timeCopy.substr(0,1).c_str());
178 timeOffsetInDays = weekday - currTimeDate->getGmt()->tm_wday;
179 timeCopy = timeCopy.substr(2,timeCopy.length());
183 timeOffsetInDays = 0;
185 // TODO: verify status of each token.
186 targetHour = atoi(timeCopy.substr(0,2).c_str());
187 targetMinute = atoi(timeCopy.substr(3,5).c_str());
188 targetSecond = atoi(timeCopy.substr(6,8).c_str());
189 targetTimeDate.tm_year = currTimeDate->getGmt()->tm_year;
190 targetTimeDate.tm_mon = currTimeDate->getGmt()->tm_mon;
191 targetTimeDate.tm_mday = currTimeDate->getGmt()->tm_mday;
192 targetTimeDate.tm_hour = targetHour;
193 targetTimeDate.tm_min = targetMinute;
194 targetTimeDate.tm_sec = targetSecond;
196 time_t processedTime = sgTimeGetGMT(&targetTimeDate);
197 processedTime += timeOffsetInDays*24*60*60;
198 if (processedTime < currTimeDate->get_cur_time())
200 processedTime += repeatPeriod;
202 //tm *temp = currTimeDate->getGmt();
204 //sgTimeFormatTime(&targetTimeDate, buffer);
205 //cout << "Scheduled Time " << buffer << endl;
206 //cout << "Time :" << time(NULL) << " SGTime : " << sgTimeGetGMT(temp) << endl;
207 return processedTime;
210 void FGScheduledFlight::update()
212 departureTime += repeatPeriod;
213 arrivalTime += repeatPeriod;
216 void FGScheduledFlight::adjustTime(time_t now)
218 //cerr << "1: Adjusting schedule please wait: " << now
219 // << " " << arrivalTime << " " << arrivalTime+repeatPeriod << endl;
220 // Make sure that the arrival time is in between
221 // the current time and the next repeat period.
222 while ((arrivalTime < now) || (arrivalTime > now+repeatPeriod))
224 if (arrivalTime < now)
226 departureTime += repeatPeriod;
227 arrivalTime += repeatPeriod;
229 else if (arrivalTime > now+repeatPeriod)
231 departureTime -= repeatPeriod;
232 arrivalTime -= repeatPeriod;
234 // cerr << "2: Adjusting schedule please wait: " << now
235 // << " " << arrivalTime << " " << arrivalTime+repeatPeriod << endl;
240 FGAirport *FGScheduledFlight::getDepartureAirport()
244 initializeAirports();
247 return departurePort;
251 FGAirport * FGScheduledFlight::getArrivalAirport ()
255 initializeAirports();
263 // Upon the first time of requesting airport information
264 // for this scheduled flight, these data need to be
265 // looked up in the main FlightGear database.
266 // Missing or bogus Airport codes are currently ignored,
267 // but we should improve that. The best idea is probably to cancel
268 // this flight entirely by removing it from the schedule, if one
269 // of the airports cannot be found.
270 bool FGScheduledFlight::initializeAirports()
272 //cerr << "Initializing using : " << depId << " " << arrId << endl;
273 departurePort = FGAirport::findByIdent(depId);
274 if(departurePort == NULL)
276 SG_LOG( SG_GENERAL, SG_DEBUG, "Traffic manager could not find departure airport : " << depId);
279 arrivalPort = FGAirport::findByIdent(arrId);
280 if(arrivalPort == NULL)
282 SG_LOG( SG_GENERAL, SG_DEBUG, "Traffic manager could not find arrival airport : " << arrId);
286 //cerr << "Found : " << departurePort->getId() << endl;
287 //cerr << "Found : " << arrivalPort->getId() << endl;
293 bool compareScheduledFlights(FGScheduledFlight *a, FGScheduledFlight *b)