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/structure/subsystem_mgr.hxx>
55 #include <simgear/timing/sg_time.hxx>
56 #include <simgear/xml/easyxml.hxx>
58 #include <AIModel/AIFlightPlan.hxx>
59 #include <AIModel/AIManager.hxx>
60 #include <Airports/simple.hxx>
61 #include <Main/fg_init.hxx> // That's pretty ugly, but I need fgFindAirportID
65 #include <Main/globals.hxx>
67 #include "SchedFlight.hxx"
70 /******************************************************************************
71 * FGScheduledFlight stuff
72 *****************************************************************************/
74 FGScheduledFlight::FGScheduledFlight()
84 FGScheduledFlight::FGScheduledFlight(const FGScheduledFlight &other)
86 callsign = other.callsign;
87 fltRules = other.fltRules;
88 departurePort = other.departurePort;
91 departureTime = other.departureTime;
92 cruiseAltitude = other.cruiseAltitude;
93 arrivalPort = other.arrivalPort;
94 arrivalTime = other.arrivalTime;
95 repeatPeriod = other.repeatPeriod;
96 initialized = other.initialized;
97 requiredAircraft = other.requiredAircraft;
98 available = other.available;
101 FGScheduledFlight::FGScheduledFlight(const string& cs,
103 const string& depPrt,
104 const string& arrPrt,
106 const string& deptime,
107 const string& arrtime,
113 //departurePort.setId(depPrt);
114 //arrivalPort.setId(arrPrt);
117 //cerr << "Constructor: departure " << depId << ". arrival " << arrId << endl;
118 //departureTime = processTimeString(deptime);
119 //arrivalTime = processTimeString(arrtime);
120 cruiseAltitude = cruiseAlt;
121 requiredAircraft = reqAC;
123 // Process the repeat period string
124 if (rep.find("WEEK",0) != string::npos)
126 repeatPeriod = 7*24*60*60; // in seconds
128 else if (rep.find("Hr", 0) != string::npos)
130 repeatPeriod = 60*60*atoi(rep.substr(0,2).c_str());
134 repeatPeriod = 365*24*60*60;
135 SG_LOG( SG_GENERAL, SG_ALERT, "Unknown repeat period in flight plan "
136 "of flight '" << cs << "': " << rep );
139 // What we still need to do is preprocess the departure and
141 departureTime = processTimeString(deptime);
142 arrivalTime = processTimeString(arrtime);
143 //departureTime += rand() % 300; // Make sure departure times are not limited to 5 minute increments.
144 if (departureTime > arrivalTime)
146 departureTime -= repeatPeriod;
153 FGScheduledFlight:: ~FGScheduledFlight()
157 time_t FGScheduledFlight::processTimeString(const string& theTime)
160 int timeOffsetInDays;
166 SGTime* currTimeDate = globals->get_time_params();
168 string timeCopy = theTime;
171 // okay first split theTime string into
172 // weekday, hour, minute, second;
173 // Check if a week day is specified
174 if (timeCopy.find("/",0) != string::npos)
176 weekday = atoi(timeCopy.substr(0,1).c_str());
177 timeOffsetInDays = weekday - currTimeDate->getGmt()->tm_wday;
178 timeCopy = timeCopy.substr(2,timeCopy.length());
182 timeOffsetInDays = 0;
184 // TODO: verify status of each token.
185 targetHour = atoi(timeCopy.substr(0,2).c_str());
186 targetMinute = atoi(timeCopy.substr(3,5).c_str());
187 targetSecond = atoi(timeCopy.substr(6,8).c_str());
188 targetTimeDate.tm_year = currTimeDate->getGmt()->tm_year;
189 targetTimeDate.tm_mon = currTimeDate->getGmt()->tm_mon;
190 targetTimeDate.tm_mday = currTimeDate->getGmt()->tm_mday;
191 targetTimeDate.tm_hour = targetHour;
192 targetTimeDate.tm_min = targetMinute;
193 targetTimeDate.tm_sec = targetSecond;
195 time_t processedTime = sgTimeGetGMT(&targetTimeDate);
196 processedTime += timeOffsetInDays*24*60*60;
197 if (processedTime < currTimeDate->get_cur_time())
199 processedTime += repeatPeriod;
201 //tm *temp = currTimeDate->getGmt();
203 //sgTimeFormatTime(&targetTimeDate, buffer);
204 //cout << "Scheduled Time " << buffer << endl;
205 //cout << "Time :" << time(NULL) << " SGTime : " << sgTimeGetGMT(temp) << endl;
206 return processedTime;
209 void FGScheduledFlight::update()
211 departureTime += repeatPeriod;
212 arrivalTime += repeatPeriod;
215 void FGScheduledFlight::adjustTime(time_t now)
217 //cerr << "1: Adjusting schedule please wait: " << now
218 // << " " << arrivalTime << " " << arrivalTime+repeatPeriod << endl;
219 // Make sure that the arrival time is in between
220 // the current time and the next repeat period.
221 while ((arrivalTime < now) || (arrivalTime > now+repeatPeriod))
223 if (arrivalTime < now)
225 departureTime += repeatPeriod;
226 arrivalTime += repeatPeriod;
228 else if (arrivalTime > now+repeatPeriod)
230 departureTime -= repeatPeriod;
231 arrivalTime -= repeatPeriod;
233 // cerr << "2: Adjusting schedule please wait: " << now
234 // << " " << arrivalTime << " " << arrivalTime+repeatPeriod << endl;
239 FGAirport *FGScheduledFlight::getDepartureAirport()
243 initializeAirports();
246 return departurePort;
250 FGAirport * FGScheduledFlight::getArrivalAirport ()
254 initializeAirports();
262 // Upon the first time of requesting airport information
263 // for this scheduled flight, these data need to be
264 // looked up in the main FlightGear database.
265 // Missing or bogus Airport codes are currently ignored,
266 // but we should improve that. The best idea is probably to cancel
267 // this flight entirely by removing it from the schedule, if one
268 // of the airports cannot be found.
269 bool FGScheduledFlight::initializeAirports()
271 //cerr << "Initializing using : " << depId << " " << arrId << endl;
272 departurePort = FGAirport::findByIdent(depId);
273 if(departurePort == NULL)
275 SG_LOG( SG_GENERAL, SG_DEBUG, "Traffic manager could not find departure airport : " << depId);
278 arrivalPort = FGAirport::findByIdent(arrId);
279 if(arrivalPort == NULL)
281 SG_LOG( SG_GENERAL, SG_DEBUG, "Traffic manager could not find arrival airport : " << arrId);
285 //cerr << "Found : " << departurePort->getId() << endl;
286 //cerr << "Found : " << arrivalPort->getId() << endl;
292 bool compareScheduledFlights(FGScheduledFlight *a, FGScheduledFlight *b)