David Culp:

First, preferences.xml will define the scenario filename.

For now, the other way of defining ai objects still works, so the sailboat
stays in preferences.xml.  Later, I'll move the sailboat into the demo
scenario.  If no scenario filename is given, then no scenario will be
processed.

I changed the demo scenario to create two 737's, one takes off on runway 01L,
and the other takes off on runway 01R.  This will make a good demo for the ai
system.  One problem, if you takeoff on 28L/R right away, you might run into
the taking-off 737's, or be scared.

src/AIModel/AIManager.cxx

@@ -39,6 +39,7 @@ FGAIManager::FGAIManager() {
   numObjects = 0;
   _dt = 0.0;
   dt_count = 9;
+  scenario_filename = "";
 }
 
 FGAIManager::~FGAIManager() {
@@ -60,6 +61,10 @@ void FGAIManager::init() {
   for (int i = 0; i < root->nChildren(); i++) {
     const SGPropertyNode * entry = root->getChild(i);
 
+    if (!strcmp(entry->getName(), "scenario")){
+      scenario_filename = entry->getStringValue();
+    }
+
     if (!strcmp(entry->getName(), "entry")) {
       if (!strcmp(entry->getStringValue("type", ""), "aircraft")) { 
 
@@ -113,10 +118,7 @@ void FGAIManager::init() {
     }
   }
 
-  //**********  Flight Plan test code !!!! ****************
-  processScenario( "default_scenario" );
-  //******************************************************* 
-
+  if (scenario_filename != "") processScenario( scenario_filename );
   initDone = true;
 }
 
@@ -373,10 +375,12 @@ void FGAIManager::processThermal( FGAIThermal* thermal ) {
 void FGAIManager::processScenario( string filename ) {
   //cout << "AIManager: creating a scenario." << endl;
   FGAIScenario* s = new FGAIScenario( filename );
-  FGAIScenario::entry* en = s->getNextEntry();
-  if (en) {
-    FGAIFlightPlan* f = new FGAIFlightPlan( en->flightplan );
-    createAircraft("jet_transport", "Aircraft/737/Models/boeing733.xml", f);
+  for (int i=0;i<s->nEntries();i++) {
+    FGAIScenario::entry* en = s->getNextEntry();
+    if (en) {
+      FGAIFlightPlan* f = new FGAIFlightPlan( en->flightplan );
+      createAircraft("jet_transport", "Aircraft/737/Models/boeing733.xml", f);
+    }
   }
   delete s;
 }

src/AIModel/AIManager.hxx

@@ -128,6 +128,7 @@ private:
     int numObjects;
     SGPropertyNode* root;
     SGPropertyNode* wind_from_down;
+    string scenario_filename;
 
     double user_latitude;
     double user_longitude;

src/AIModel/AIScenario.cxx

@@ -53,9 +53,11 @@ FGAIScenario::FGAIScenario(string filename)
      entries.push_back( en );
      SGPropertyNode * entry_node = node->getChild(i);
      en->callsign       = entry_node->getStringValue("callsign", "none");
+     en->aitype         = entry_node->getStringValue("type", "aircraft");
      en->aircraft_class = entry_node->getStringValue("class", "jet_transport");
      en->model_path     = entry_node->getStringValue("model", "Models/Geometry/glider.ac");
      en->flightplan     = entry_node->getStringValue("flightplan", "");
+     en->repeat         = entry_node->getDoubleValue("repeat", 0.0); 
    }
 
   entry_iterator = entries.begin();
@@ -72,7 +74,12 @@ FGAIScenario::~FGAIScenario()
 FGAIScenario::entry*
 FGAIScenario::getNextEntry( void )
 {
-  return *entry_iterator;
+  if (entries.size() == 0) return 0;
+  if (entry_iterator != entries.end()) {
+    return *entry_iterator++;
+  } else {
+    return 0;
+  }
 }
 
 int FGAIScenario::nEntries( void )

src/AIModel/AIScenario.hxx

@@ -32,9 +32,11 @@ public:
 
   typedef struct {
    string callsign;
+   string aitype;       // can be aircraft, ship, storm, thermal
    string aircraft_class;
    string model_path;
    string flightplan;
+   double repeat;       // in seconds
   } entry;
 
    FGAIScenario(string filename);