fix a segmentation fault situation that is exposed at least on IRIX (but not Linux).

[flightgear.git] / src / AIModel / AIBase.hxx

diff --git a/src/AIModel/AIBase.hxx b/src/AIModel/AIBase.hxx
index 071abe7887adb0060db6c51dd43712fb44034d4d..89c7981528b7d49c0a6b173d5d79db615b092305 100644 (file)
--- a/src/AIModel/AIBase.hxx
+++ b/src/AIModel/AIBase.hxx
@@ -1,4 +1,4 @@
-// FGAIBase - abstract base class for AI objects
+// FGAIBase.hxx - abstract base class for AI objects
 // Written by David Culp, started Nov 2003, based on
 // David Luff's FGAIEntity class.
 // - davidculp2@comcast.net
@@ -62,7 +62,9 @@ typedef struct {
    double buoyancy;           // acceleration in ft per sec2
    double wind_from_east;     // in feet per second
    double wind_from_north;    // in feet per second
-   bool wind;
+   double cd;                 // coefficient of drag
+   bool wind;                 // if true, model reacts to parent wind
+   double weight;             // in lbs
 } FGAIModelEntity;
 
 
@@ -177,6 +179,9 @@ public:
     double _getY_shift() const;
     double _getRotation() const;
 
+    static const double rho;
+    static const double lbs_to_slugs;
+
     int _getID() const;
 
     inline double _getRange() { return range; };