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 <Airports/simple.hxx>
23 #include <Main/fgfs.hxx>
24 #include <Main/fg_props.hxx>
25 #include <Main/globals.hxx>
26 #include <simgear/misc/sg_path.hxx>
27 #include <simgear/bucket/newbucket.hxx>
34 # include <sys/types.h> // for directory reading
35 # include <dirent.h> // for directory reading
39 #include "AILocalTraffic.hxx"
40 #include "ATCutils.hxx"
46 ATC = globals->get_ATC_mgr();
52 void FGAIMgr::init() {
53 // Pointers to user's position
54 lon_node = fgGetNode("/position/longitude-deg", true);
55 lat_node = fgGetNode("/position/latitude-deg", true);
56 elev_node = fgGetNode("/position/altitude-ft", true);
58 // go through the $FG_ROOT/ATC directory and find all *.taxi files
59 SGPath path(globals->get_fg_root());
61 string dir = path.dir();
66 // WARNING - I (DCL) haven't tested this on MSVC - this is simply cribbed from TerraGear
69 struct _finddata_t de;
72 path_str = dir + "\\*.*";
74 if ( ( hfile = _findfirst( path.c_str(), &de ) ) == -1 ) {
75 cout << "cannot open directory " << dir << "\n";
77 // load all .taxi files
81 ext = file.substr(pos + 1);
83 cout << "TAXI FILE FOUND!!!\n";
84 f_ident = file.substr(0, pos);
86 if(dclFindAirportID(f_ident, &a)) {
87 SGBucket sgb(a.longitude, a.latitude);
88 int idx = sgb.gen_index();
89 if(airports.find(idx) != airports.end()) {
90 airports[idx]->push_back(f_ident);
92 aptID_list_type* apts = new aptID_list_type;
93 apts->push_back(f_ident);
96 cout << "Mapping " << f_ident << " to bucket " << idx << '\n';
99 } while ( _findnext( hfile, &de ) == 0 );
106 if ( (d = opendir( dir.c_str() )) == NULL ) {
107 cout << "cannot open directory " << dir << "\n";
109 cout << "Opened directory " << dir << " OK :-)\n";
110 cout << "Contents are:\n";
111 // load all .taxi files
112 while ( (de = readdir(d)) != NULL ) {
114 pos = file.find(".");
115 cout << file << '\n';
117 ext = file.substr(pos + 1);
119 cout << "TAXI FILE FOUND!!!\n";
120 f_ident = file.substr(0, pos);
122 if(dclFindAirportID(f_ident, &a)) {
123 SGBucket sgb(a.longitude, a.latitude);
124 int idx = sgb.gen_index();
125 if(airports.find(idx) != airports.end()) {
126 airports[idx]->push_back(f_ident);
128 aptID_list_type* apts = new aptID_list_type;
129 apts->push_back(f_ident);
130 airports[idx] = apts;
132 cout << "Mapping " << f_ident << " to bucket " << idx << '\n';
140 // See if are in range at startup and activate if necessary
144 void FGAIMgr::bind() {
147 void FGAIMgr::unbind() {
150 void FGAIMgr::update(double dt) {
154 // Don't update any planes for first 50 runs through - this avoids some possible initialisation anomalies
155 // Might not need it now we have fade-in though?
168 // TODO - need to add a check of if any activated airports have gone out of range
170 // Traverse the list of active planes and run all their update methods
171 // TODO - spread the load - not all planes should need updating every frame.
172 // Note that this will require dt to be calculated for each plane though
173 // since they rely on it to calculate distance travelled.
174 ai_list_itr = ai_list.begin();
175 while(ai_list_itr != ai_list.end()) {
176 (*ai_list_itr)->Update(dt);
182 // Activate AI traffic at an airport
183 void FGAIMgr::ActivateAirport(string ident) {
184 ATC->AIRegisterAirport(ident);
185 // TODO - need to start the traffic more randomly
186 FGAILocalTraffic* local_traffic = new FGAILocalTraffic;
187 //local_traffic->Init(ident, IN_PATTERN, TAKEOFF_ROLL);
188 local_traffic->Init(ident);
189 local_traffic->FlyCircuits(1, true); // Fly 2 circuits with touch & go in between
190 ai_list.push_back(local_traffic);
191 activated[ident] = 1;
195 // Search for valid airports in the vicinity of the user and activate them if necessary
196 void FGAIMgr::SearchByPos(double range)
198 //cout << "In SearchByPos(...)\n";
200 // get bucket number for plane position
201 lon = lon_node->getDoubleValue();
202 lat = lat_node->getDoubleValue();
203 SGBucket buck(lon, lat);
205 // get neigboring buckets
206 int bx = (int)( range*SG_NM_TO_METER / buck.get_width_m() / 2);
207 //cout << "bx = " << bx << '\n';
208 int by = (int)( range*SG_NM_TO_METER / buck.get_height_m() / 2 );
209 //cout << "by = " << by << '\n';
211 // loop over bucket range
212 for ( int i=-bx; i<=bx; i++) {
213 //cout << "i loop\n";
214 for ( int j=-by; j<=by; j++) {
215 //cout << "j loop\n";
216 buck = sgBucketOffset(lon, lat, i, j);
217 long int bucket = buck.gen_index();
218 //cout << "bucket is " << bucket << '\n';
219 aptID_list_type* apts = airports[bucket];
220 aptID_list_iterator current = apts->begin();
221 aptID_list_iterator last = apts->end();
223 //cout << "Size of apts is " << apts->size() << '\n';
225 //double rlon = lon * SGD_DEGREES_TO_RADIANS;
226 //double rlat = lat * SGD_DEGREES_TO_RADIANS;
227 //Point3D aircraft = sgGeodToCart( Point3D(rlon, rlat, elev) );
229 for(; current != last; ++current) {
230 //cout << "Found " << *current << '\n';
231 if(activated.find(*current) == activated.end()) {
232 //cout << "Activating " << *current << '\n';
234 //if(dclFindAirportID(*current, &a)) {
235 // // We can do something here based on distance from the user if we wish.
237 ActivateAirport(*current);
239 //cout << *current << " already activated\n";