This patch only affects aircraft (AI Models) that have no predefined

flightplan.  Such aircraft are given some initial conditions that they
fly with.  They proceed on in "freeflight" mode indefinitely.  For example,
there is a refueling demo where the tanker starts at 3000', 280 kts, and
in a 15 degree bank, and then continues to orbit indefinitely.

For these aircraft with no flightplan, I have added several control nodes in
controls/flight that allow a script or menu or external application to set
heading, altitude, bank angle, and speed.  This permits some level of interactive
or scripted control over AI aircraft.

diff --git a/src/AIModel/AIAircraft.cxx b/src/AIModel/AIAircraft.cxx
index cdc1fbf7eb9af16212394f3ad1623b6c805f68cd..0f1295276452c0e932abedb66b2934d9fd3e8482 100644 (file)
--- a/src/AIModel/AIAircraft.cxx
+++ b/src/AIModel/AIAircraft.cxx
@@ -184,6 +184,35 @@ void FGAIAircraft::Run(double dt) {
             }
             return;
         }
+    } else {
+        // no flight plan, update target heading, speed, and altitude
+        // from control properties.  These default to the initial
+        // settings in the config file, but can be changed "on the
+        // fly".
+
+        string lat_mode = props->getStringValue("controls/flight/lateral-mode");
+        if ( lat_mode == "roll" ) {
+            double angle
+                = props->getDoubleValue("controls/flight/target-roll" );
+            RollTo( angle );
+        } else {
+             double angle
+                = props->getDoubleValue("controls/flight/target-hdg" );
+            TurnTo( angle );
+        }
+
+        string lon_mode
+            = props->getStringValue("controls/flight/longitude-mode");
+        if ( lon_mode == "alt" ) {
+            double alt = props->getDoubleValue("controls/flight/target-alt" );
+            ClimbTo( alt );
+        } else {
+            double angle
+                = props->getDoubleValue("controls/flight/target-pitch" );
+            PitchTo( angle );
+        }
+
+        AccelTo( props->getDoubleValue("controls/flight/target-spd" ) );
     }
 
     double turn_radius_ft;

diff --git a/src/AIModel/AIBase.cxx b/src/AIModel/AIBase.cxx
index 8746af4c1048d3ebafa57bb7fa8e5371d75b5b37..1b73b39e7030213659474250c7d3eccd95f91453 100644 (file)
--- a/src/AIModel/AIBase.cxx
+++ b/src/AIModel/AIBase.cxx
@@ -223,6 +223,17 @@ void FGAIBase::bind() {
    props->setBoolValue("controls/lighting/beacon", true);
    props->setBoolValue("controls/lighting/strobe", true);
    props->setBoolValue("controls/glide-path", true);
+
+   props->setStringValue("controls/flight/lateral-mode", "roll");
+   props->setDoubleValue("controls/flight/target-hdg", hdg);
+   props->setDoubleValue("controls/flight/target-roll", roll);
+
+   props->setStringValue("controls/flight/longitude-mode", "alt");
+   props->setDoubleValue("controls/flight/target-alt", altitude);
+   props->setDoubleValue("controls/flight/target-pitch", pitch);
+
+   props->setDoubleValue("controls/flight/target-spd", speed);
+
 }
 
 void FGAIBase::unbind() {