exponential smoothing

Author: mars

LibSource/SmoothFloat.hpp

@@ -0,0 +1,27 @@
+
+/**
+ * Applies exponential smoothing to a float value.
+ * y(n) = lambda*y(n-1) + (1.0-lambda)*y(n)
+ */
+class SmoothFloat {
+private:
+  float value;
+public:
+  float lambda;
+  SmoothFloat(float l=0.9, float initialValue=0.0)
+    : lambda(l), value(initialValue){}
+  void setValue(float newValue){
+    value = value*lambda + newValue*(1.0-lambda);
+  }
+  float getValue(){
+    return value;
+  }
+  SmoothFloat& operator=(const float& other){
+    setValue(other);
+    return *this;
+  }
+  operator float(){
+    return value;
+  }
+};
+