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
36 * - Find an alternative for the depricated Point3D class
38 *****************************************************************************/
55 #include <simgear/compiler.h>
56 #include <simgear/math/polar3d.hxx>
57 #include <simgear/math/sg_geodesy.hxx>
58 #include <simgear/props/props.hxx>
59 #include <simgear/route/waypoint.hxx>
60 #include <simgear/structure/subsystem_mgr.hxx>
61 #include <simgear/timing/sg_time.hxx>
62 #include <simgear/xml/easyxml.hxx>
64 #include <AIModel/AIFlightPlan.hxx>
65 #include <AIModel/AIManager.hxx>
66 #include <Airports/simple.hxx>
67 #include <Main/fg_init.hxx> // That's pretty ugly, but I need fgFindAirportID
71 #include <Main/globals.hxx>
73 #include "SchedFlight.hxx"
76 /******************************************************************************
77 * FGScheduledFlight stuff
78 *****************************************************************************/
80 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;
99 FGScheduledFlight::FGScheduledFlight(const string& cs,
101 const string& depPrt,
102 const string& arrPrt,
104 const string& deptime,
105 const string& arrtime,
110 //departurePort.setId(depPrt);
111 //arrivalPort.setId(arrPrt);
114 //cerr << "Constructor: departure " << depId << ". arrival " << arrId << endl;
115 //departureTime = processTimeString(deptime);
116 //arrivalTime = processTimeString(arrtime);
117 cruiseAltitude = cruiseAlt;
119 // Process the repeat period string
120 if (rep.find("WEEK",0) != string::npos)
122 repeatPeriod = 7*24*60*60; // in seconds
124 else if (rep.find("Hr", 0) != string::npos)
126 repeatPeriod = 60*60*atoi(rep.substr(0,2).c_str());
130 cerr << "Unknown repeat period" << endl;
134 // What we still need to do is preprocess the departure and
136 departureTime = processTimeString(deptime);
137 arrivalTime = processTimeString(arrtime);
138 if (departureTime > arrivalTime)
140 departureTime -= repeatPeriod;
146 FGScheduledFlight:: ~FGScheduledFlight()
150 time_t FGScheduledFlight::processTimeString(const string& theTime)
153 int timeOffsetInDays;
159 SGTime* currTimeDate = globals->get_time_params();
161 string timeCopy = theTime;
164 // okay first split theTime string into
165 // weekday, hour, minute, second;
166 // Check if a week day is specified
167 if (timeCopy.find("/",0) != string::npos)
169 weekday = atoi(timeCopy.substr(0,1).c_str());
170 timeOffsetInDays = weekday - currTimeDate->getGmt()->tm_wday;
171 timeCopy = timeCopy.substr(2,timeCopy.length());
175 timeOffsetInDays = 0;
177 targetHour = atoi(timeCopy.substr(0,2).c_str());
178 targetMinute = atoi(timeCopy.substr(3,5).c_str());
179 targetSecond = atoi(timeCopy.substr(6,8).c_str());
180 targetTimeDate.tm_year = currTimeDate->getGmt()->tm_year;
181 targetTimeDate.tm_mon = currTimeDate->getGmt()->tm_mon;
182 targetTimeDate.tm_mday = currTimeDate->getGmt()->tm_mday;
183 targetTimeDate.tm_hour = targetHour;
184 targetTimeDate.tm_min = targetMinute;
185 targetTimeDate.tm_sec = targetSecond;
187 time_t processedTime = sgTimeGetGMT(&targetTimeDate);
188 processedTime += timeOffsetInDays*24*60*60;
189 if (processedTime < currTimeDate->get_cur_time())
191 processedTime += repeatPeriod;
193 //tm *temp = currTimeDate->getGmt();
195 //sgTimeFormatTime(&targetTimeDate, buffer);
196 //cout << "Scheduled Time " << buffer << endl;
197 //cout << "Time :" << time(NULL) << " SGTime : " << sgTimeGetGMT(temp) << endl;
198 return processedTime;
201 void FGScheduledFlight::update()
203 departureTime += repeatPeriod;
204 arrivalTime += repeatPeriod;
207 void FGScheduledFlight::adjustTime(time_t now)
209 //cerr << "1: Adjusting schedule please wait: " << now
210 // << " " << arrivalTime << " " << arrivalTime+repeatPeriod << endl;
211 // Make sure that the arrival time is in between
212 // the current time and the next repeat period.
213 while ((arrivalTime < now) || (arrivalTime > now+repeatPeriod))
215 if (arrivalTime < now)
217 departureTime += repeatPeriod;
218 arrivalTime += repeatPeriod;
220 else if (arrivalTime > now+repeatPeriod)
222 departureTime -= repeatPeriod;
223 arrivalTime -= repeatPeriod;
225 // cerr << "2: Adjusting schedule please wait: " << now
226 // << " " << arrivalTime << " " << arrivalTime+repeatPeriod << endl;
231 FGAirport *FGScheduledFlight::getDepartureAirport()
235 initializeAirports();
238 return departurePort;
242 FGAirport * FGScheduledFlight::getArrivalAirport ()
246 initializeAirports();
254 // Upon the first time of requesting airport information
255 // for this scheduled flight, these data need to be
256 // looked up in the main FlightGear database.
257 // Missing or bogus Airport codes are currently ignored,
258 // but we should improve that. The best idea is probably to cancel
259 // this flight entirely by removing it from the schedule, if one
260 // of the airports cannot be found.
261 bool FGScheduledFlight::initializeAirports()
263 //cerr << "Initializing using : " << depId << " " << arrId << endl;
264 departurePort = globals->get_airports()->search(depId);
265 if(departurePort == NULL)
267 cerr << "Could not find " << depId << endl;
270 arrivalPort = globals->get_airports()->search(arrId);
271 if(arrivalPort == NULL)
273 cerr << "Could not find " << arrId << endl;
277 //cerr << "Found : " << departurePort->getId() << endl;
278 //cerr << "Found : " << arrivalPort->getId() << endl;