X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FATC%2FAIMgr.cxx;h=629d5d97b09f1d4db7c36233c7c64d5a93d011ec;hb=68f248879cb15562c7b026445f83caf8f2842ae9;hp=8f23a5507aa89e6336f5811e3fc9066bf663cef9;hpb=0bea768f245a76d15ae983f52fed8209b72b5cd9;p=flightgear.git

diff --git a/src/ATC/AIMgr.cxx b/src/ATC/AIMgr.cxx
index 8f23a5507..629d5d97b 100644
--- a/src/ATC/AIMgr.cxx
+++ b/src/ATC/AIMgr.cxx
@@ -53,9 +53,12 @@ FGAIMgr::FGAIMgr() {
 	// TODO - use the proper user callsign when it becomes user settable.
 	removalList.clear();
 	activated.clear();
+	_havePiperModel = true;
 }
 
 FGAIMgr::~FGAIMgr() {
+	_defaultModel->deRef();
+	if(_havePiperModel) _piperModel->deRef();
 }
 
 void FGAIMgr::init() {
@@ -72,17 +75,40 @@ void FGAIMgr::init() {
 	
 	// Load up models at the start to avoid pausing later
 	// Hack alert - Hardwired paths!!
-	string planepath = "Aircraft/c172/Models/c172-dpm.ac";
-	_defaultModel = sgLoad3DModel( globals->get_fg_root(),
-	                               planepath.c_str(),
-	                               globals->get_props(),
-	                               globals->get_sim_time_sec() );
+	string planepath = "Aircraft/c172r/Models/c172-dpm.ac";
+	bool _loadedDefaultOK = true;
+	try {
+		_defaultModel = sgLoad3DModel( globals->get_fg_root(),
+	    	                           planepath.c_str(),
+									   globals->get_props(),
+									   globals->get_sim_time_sec() );
+	} catch(sg_exception& e) {
+		_loadedDefaultOK = false;
+	}
+	
+	if(!_loadedDefaultOK ) {
+		// Just load the same 3D model as the default user plane - that's *bound* to exist!
+		// TODO - implement robust determination of availability of GA AI aircraft models
+		planepath = "Aircraft/c172p/Models/c172p.ac";
+		_defaultModel = sgLoad3DModel( globals->get_fg_root(),
+	    	                           planepath.c_str(),
+									   globals->get_props(),
+									   globals->get_sim_time_sec() );
+	}
 
 	planepath = "Aircraft/pa28-161/Models/pa28-161.ac";
-	_piperModel = sgLoad3DModel( globals->get_fg_root(),
-	                             planepath.c_str(),
-	                             globals->get_props(),
-	                             globals->get_sim_time_sec() );
+	try {
+		_piperModel = sgLoad3DModel( globals->get_fg_root(),
+	    	                         planepath.c_str(),
+									 globals->get_props(),
+									 globals->get_sim_time_sec() );
+	} catch(sg_exception& e) {
+		_havePiperModel = false;
+	}
+
+	// We need to keep one ref of the models open to stop ssg deleting them behind our back!
+	_defaultModel->ref();
+	if(_havePiperModel) _piperModel->ref();
 
 	// go through the $FG_ROOT/ATC directory and find all *.taxi files
 	SGPath path(globals->get_fg_root());
@@ -107,7 +133,7 @@ void FGAIMgr::init() {
 				f_ident = file.substr(0, pos);
 				FGAirport a;
 				if(dclFindAirportID(f_ident, &a)) {
-					SGBucket sgb(a.longitude, a.latitude);
+					SGBucket sgb(a.getLongitude(), a.getLatitude());
 					int idx = sgb.gen_index();
 					if(facilities.find(idx) != facilities.end()) {
 						facilities[idx]->push_back(f_ident);
@@ -327,13 +353,13 @@ void FGAIMgr::GenerateSimpleAirportTraffic(string ident, double min_dist) {
 	bool cessna = true;
 	
 	// Get the time and only operate VFR in the (approximate) daytime.
-	//SGTime *t = globals->get_time_params();
-	string time_str = fgGetString("sim/time/gmt-string");
-	int loc_time = atoi((time_str.substr(0,3)).c_str());
-	//cout << "gmt_time = " << loc_time << '\n';
-	loc_time += (int)((aptpos.lon() / 360.0) * 24.0);
-	while(loc_time < 0) loc_time += 24;
-	while(loc_time > 24) loc_time -= 24;
+	struct tm *t = globals->get_time_params()->getGmt();
+	int loc_time = t->tm_hour + int(aptpos.lon() / (360.0 / 24.0));
+	while (loc_time < 0)
+		loc_time += 24;
+	while (loc_time >= 24)
+		loc_time -= 24;
+
 	//cout << "loc_time = " << loc_time << '\n';
 	if(loc_time < 7 || loc_time > 19) return;
 	
@@ -442,7 +468,7 @@ void FGAIMgr::GenerateSimpleAirportTraffic(string ident, double min_dist) {
 			else cessna = true;
 			string s = GenerateShortForm(GenerateUniqueCallsign(), (cessna ? "Cessna-" : "Piper-"));
 			FGAIGAVFRTraffic* t = new FGAIGAVFRTraffic();
-			t->SetModel(cessna ? _defaultModel : _piperModel);
+			t->SetModel(cessna ? _defaultModel : (_havePiperModel ? _piperModel : _defaultModel));
 			//cout << "Generating VFR traffic " << s << " inbound to " << ident << " " << ad << " meters out from " << dir << " degrees\n";
 			Point3D tpos = dclUpdatePosition(aptpos, dir, 6.0, ad);
 			if(tpos.elev() > (aptpos.elev() + 3000.0)) tpos.setelev(aptpos.elev() + 3000.0);	// FEET yuk :-(