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., 675 Mass Ave, Cambridge, MA 02139, 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
36 * - Find an alternative for the depricated Point3D class
38 *****************************************************************************/
50 #include <simgear/compiler.h>
51 #include <simgear/math/polar3d.hxx>
52 #include <simgear/math/sg_geodesy.hxx>
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()
79 FGScheduledFlight::FGScheduledFlight(const FGScheduledFlight &other)
81 callsign = other.callsign;
82 fltRules = other.fltRules;
83 departurePort = other.departurePort;
86 departureTime = other.departureTime;
87 cruiseAltitude = other.cruiseAltitude;
88 arrivalPort = other.arrivalPort;
89 arrivalTime = other.arrivalTime;
90 repeatPeriod = other.repeatPeriod;
91 initialized = other.initialized;
94 FGScheduledFlight::FGScheduledFlight(string cs,
105 //departurePort.setId(depPrt);
106 //arrivalPort.setId(arrPrt);
109 //cerr << "Constructor: departure " << depId << ". arrival " << arrId << endl;
110 //departureTime = processTimeString(deptime);
111 //arrivalTime = processTimeString(arrtime);
112 cruiseAltitude = cruiseAlt;
114 // Process the repeat period string
115 if (rep.find("WEEK",0) != string::npos)
117 repeatPeriod = 7*24*60*60; // in seconds
119 else if (rep.find("Hr", 0) != string::npos)
121 repeatPeriod = 60*60*atoi(rep.substr(0,2).c_str());
125 cerr << "Unknown repeat period" << endl;
129 // What we still need to do is preprocess the departure and
131 departureTime = processTimeString(deptime);
132 arrivalTime = processTimeString(arrtime);
133 if (departureTime > arrivalTime)
135 departureTime -= repeatPeriod;
141 FGScheduledFlight:: ~FGScheduledFlight()
145 time_t FGScheduledFlight::processTimeString(string theTime)
148 int timeOffsetInDays;
155 SGTime* currTimeDate = globals->get_time_params();
157 string timeCopy = theTime;
160 // okay first split theTime string into
161 // weekday, hour, minute, second;
162 // Check if a week day is specified
163 if (timeCopy.find("/",0) != string::npos)
165 weekday = atoi(timeCopy.substr(0,1).c_str());
166 timeOffsetInDays = weekday - currTimeDate->getGmt()->tm_wday;
167 timeCopy = timeCopy.substr(2,timeCopy.length());
171 timeOffsetInDays = 0;
173 targetHour = atoi(timeCopy.substr(0,2).c_str());
174 targetMinute = atoi(timeCopy.substr(3,5).c_str());
175 targetSecond = atoi(timeCopy.substr(6,8).c_str());
176 targetTimeDate.tm_year = currTimeDate->getGmt()->tm_year;
177 targetTimeDate.tm_mon = currTimeDate->getGmt()->tm_mon;
178 targetTimeDate.tm_mday = currTimeDate->getGmt()->tm_mday;
179 targetTimeDate.tm_hour = targetHour;
180 targetTimeDate.tm_min = targetMinute;
181 targetTimeDate.tm_sec = targetSecond;
183 time_t processedTime = sgTimeGetGMT(&targetTimeDate);
184 processedTime += timeOffsetInDays*24*60*60;
185 if (processedTime < currTimeDate->get_cur_time())
187 processedTime += repeatPeriod;
189 //tm *temp = currTimeDate->getGmt();
191 //sgTimeFormatTime(&targetTimeDate, buffer);
192 //cout << "Scheduled Time " << buffer << endl;
193 //cout << "Time :" << time(NULL) << " SGTime : " << sgTimeGetGMT(temp) << endl;
194 return processedTime;
197 void FGScheduledFlight::update()
199 departureTime += repeatPeriod;
200 arrivalTime += repeatPeriod;
203 void FGScheduledFlight::adjustTime(time_t now)
205 //cerr << "1: Adjusting schedule please wait: " << now
206 // << " " << arrivalTime << " " << arrivalTime+repeatPeriod << endl;
207 // Make sure that the arrival time is in between
208 // the current time and the next repeat period.
209 while ((arrivalTime < now) || (arrivalTime > now+repeatPeriod))
211 if (arrivalTime < now)
213 departureTime += repeatPeriod;
214 arrivalTime += repeatPeriod;
216 else if (arrivalTime > now+repeatPeriod)
218 departureTime -= repeatPeriod;
219 arrivalTime -= repeatPeriod;
221 // cerr << "2: Adjusting schedule please wait: " << now
222 // << " " << arrivalTime << " " << arrivalTime+repeatPeriod << endl;
227 FGAirport *FGScheduledFlight::getDepartureAirport()
231 initializeAirports();
234 return departurePort;
238 FGAirport * FGScheduledFlight::getArrivalAirport ()
242 initializeAirports();
250 // Upon the first time of requesting airport information
251 // for this scheduled flight, these data need to be
252 // looked up in the main FlightGear database.
253 // Missing or bogus Airport codes are currently ignored,
254 // but we should improve that. The best idea is probably to cancel
255 // this flight entirely by removing it from the schedule, if one
256 // of the airports cannot be found.
257 bool FGScheduledFlight::initializeAirports()
259 //cerr << "Initializing using : " << depId << " " << arrId << endl;
260 departurePort = globals->get_airports()->search( depId, departurePort );
261 if(departurePort->getId().empty())
263 cerr << "Could not find " << depId << endl;
266 arrivalPort = globals->get_airports()->search(arrId, arrivalPort);
267 if(arrivalPort->getId().empty())
269 cerr << "Could not find " << arrId << endl;
273 //cerr << "Found : " << departurePort->getId() << endl;
274 //cerr << "Found : " << arrivalPort->getId() << endl;