James Turner:

[flightgear.git] / src / FDM / UFO.hxx

diff --git a/src/FDM/UFO.hxx b/src/FDM/UFO.hxx
index b680fd953ef541554697d72ab9d45384cb031720..d22832f70d56f25f12eb88ad692566b58eb8ab02 100644 (file)
--- a/src/FDM/UFO.hxx
+++ b/src/FDM/UFO.hxx
@@ -28,18 +28,23 @@
 
 
 class FGUFO: public FGInterface {
+private:
+
     class lowpass {
+    private:
+        static double _dt;
         double _coeff;
         double _last;
         bool _initialized;
     public:
         lowpass(double coeff) : _coeff(coeff), _initialized(false) {}
-        double filter(double dt, double value) {
+        static inline void set_delta(double dt) { _dt = dt; }
+        double filter(double value) {
             if (!_initialized) {
                 _initialized = true;
                 return _last = value;
             }
-            double c = dt / (_coeff + dt);
+            double c = _dt / (_coeff + _dt);
             return _last = value * c + _last * (1.0 - c);
         }
     };
@@ -57,7 +62,7 @@ public:
     FGUFO( double dt );
     ~FGUFO();
 
-    // reset flight params to a specific position 
+    // reset flight params to a specific position
     void init();
 
     // update position based on inputs, positions, velocities, etc.