1 // AIMgr.cxx - implementation of FGAIMgr
2 // - a global management class for FlightGear generated AI traffic
4 // Written by David Luff, started March 2002.
6 // Copyright (C) 2002 David C Luff - david.luff@nottingham.ac.uk
8 // This program is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU General Public License as
10 // published by the Free Software Foundation; either version 2 of the
11 // License, or (at your option) any later version.
13 // This program is distributed in the hope that it will be useful, but
14 // WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include <simgear/misc/sg_path.hxx>
24 #include <Main/fg_props.hxx>
25 #include <Main/globals.hxx>
32 # include <sys/types.h> // for directory reading
33 # include <dirent.h> // for directory reading
37 #include "AILocalTraffic.hxx"
38 #include "ATCutils.hxx"
44 ATC = globals->get_ATC_mgr();
51 void FGAIMgr::init() {
52 // Pointers to user's position
53 lon_node = fgGetNode("/position/longitude-deg", true);
54 lat_node = fgGetNode("/position/latitude-deg", true);
55 elev_node = fgGetNode("/position/altitude-ft", true);
57 lon = lon_node->getDoubleValue();
58 lat = lat_node->getDoubleValue();
59 elev = elev_node->getDoubleValue();
61 // go through the $FG_ROOT/ATC directory and find all *.taxi files
62 SGPath path(globals->get_fg_root());
64 string dir = path.dir();
69 // WARNING - I (DCL) haven't tested this on MSVC - this is simply cribbed from TerraGear
72 struct _finddata_t de;
75 path_str = dir + "\\*.*";
77 if ( ( hfile = _findfirst( path.c_str(), &de ) ) == -1 ) {
78 SG_LOG(SG_ATC, SG_WARN, "cannot open directory " << dir);
80 // load all .taxi files
84 ext = file.substr(pos + 1);
86 f_ident = file.substr(0, pos);
88 if(dclFindAirportID(f_ident, &a)) {
89 SGBucket sgb(a.longitude, a.latitude);
90 int idx = sgb.gen_index();
91 if(airports.find(idx) != airports.end()) {
92 airports[idx]->push_back(f_ident);
94 aptID_list_type* apts = new aptID_list_type;
95 apts->push_back(f_ident);
98 SG_LOG(SG_ATC, SG_BULK, "Mapping " << f_ident << " to bucket " << idx);
101 } while ( _findnext( hfile, &de ) == 0 );
108 if ( (d = opendir( dir.c_str() )) == NULL ) {
109 SG_LOG(SG_ATC, SG_WARN, "cannot open directory " << dir);
111 // load all .taxi files
112 while ( (de = readdir(d)) != NULL ) {
114 pos = file.find(".");
115 ext = file.substr(pos + 1);
117 f_ident = file.substr(0, pos);
119 if(dclFindAirportID(f_ident, &a)) {
120 SGBucket sgb(a.longitude, a.latitude);
121 int idx = sgb.gen_index();
122 if(airports.find(idx) != airports.end()) {
123 airports[idx]->push_back(f_ident);
125 aptID_list_type* apts = new aptID_list_type;
126 apts->push_back(f_ident);
127 airports[idx] = apts;
129 SG_LOG(SG_ATC, SG_BULK, "Mapping " << f_ident << " to bucket " << idx);
137 // See if are in range at startup and activate if necessary
143 void FGAIMgr::bind() {
146 void FGAIMgr::unbind() {
149 void FGAIMgr::update(double dt) {
152 SG_LOG(SG_ATC, SG_WARN, "Warning - AIMgr::update(...) called before AIMgr::init()");
158 // Don't update any planes for first 50 runs through - this avoids some possible initialisation anomalies
159 // Might not need it now we have fade-in though?
172 // TODO - need to add a check of if any activated airports have gone out of range
174 // Traverse the list of active planes and run all their update methods
175 // TODO - spread the load - not all planes should need updating every frame.
176 // Note that this will require dt to be calculated for each plane though
177 // since they rely on it to calculate distance travelled.
178 ai_list_itr = ai_list.begin();
179 while(ai_list_itr != ai_list.end()) {
180 (*ai_list_itr)->Update(dt);
186 // Activate AI traffic at an airport
187 void FGAIMgr::ActivateAirport(string ident) {
188 ATC->AIRegisterAirport(ident);
189 // TODO - need to start the traffic more randomly
190 FGAILocalTraffic* local_traffic = new FGAILocalTraffic;
191 //local_traffic->Init(ident, IN_PATTERN, TAKEOFF_ROLL);
192 local_traffic->Init(ident);
193 local_traffic->FlyCircuits(1, true); // Fly 2 circuits with touch & go in between
194 ai_list.push_back(local_traffic);
195 activated[ident] = 1;
199 // Search for valid airports in the vicinity of the user and activate them if necessary
200 void FGAIMgr::SearchByPos(double range)
202 //cout << "In SearchByPos(...)" << endl;
204 // get bucket number for plane position
205 lon = lon_node->getDoubleValue();
206 lat = lat_node->getDoubleValue();
207 SGBucket buck(lon, lat);
209 // get neigboring buckets
210 int bx = (int)( range*SG_NM_TO_METER / buck.get_width_m() / 2);
211 //cout << "bx = " << bx << endl;
212 int by = (int)( range*SG_NM_TO_METER / buck.get_height_m() / 2 );
213 //cout << "by = " << by << endl;
215 // loop over bucket range
216 for ( int i=-bx; i<=bx; i++) {
217 //cout << "i loop\n";
218 for ( int j=-by; j<=by; j++) {
219 //cout << "j loop\n";
220 buck = sgBucketOffset(lon, lat, i, j);
221 long int bucket = buck.gen_index();
222 //cout << "bucket is " << bucket << endl;
223 if(airports.find(bucket) != airports.end()) {
224 aptID_list_type* apts = airports[bucket];
225 aptID_list_iterator current = apts->begin();
226 aptID_list_iterator last = apts->end();
228 //cout << "Size of apts is " << apts->size() << endl;
230 //double rlon = lon * SGD_DEGREES_TO_RADIANS;
231 //double rlat = lat * SGD_DEGREES_TO_RADIANS;
232 //Point3D aircraft = sgGeodToCart( Point3D(rlon, rlat, elev) );
234 for(; current != last; ++current) {
235 //cout << "Found " << *current << endl;;
236 if(activated.find(*current) == activated.end()) {
237 //cout << "Activating " << *current << endl;
239 //if(dclFindAirportID(*current, &a)) {
240 // // We can do something here based on distance from the user if we wish.
242 ActivateAirport(*current);
243 //cout << "Activation done" << endl;
245 //cout << *current << " already activated" << endl;