comparison src/samer/units/EnergyOperator.java @ 0:bf79fb79ee13

Initial Mercurial check in.

+/*
+ *	Copyright (c) 2000, Samer Abdallah, King's College London.
+ *	All rights reserved.
+ *
+ *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
+ *	without even the implied warranty of MERCHANTABILITY or 
+ *	FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+package samer.units;
+import  samer.core.*;
+import  samer.maths.*;
+
+public class EnergyOperator implements Filter
+{
+	double	u1=0, u2=0;	// previous two values
+
+	public EnergyOperator()	{}
+
+	public void dispose() {}
+
+	public double filter( double u0)
+	{
+		double	y=u1*u1 - u0*u2; 
+		u2=u1; 
+		u1=u0;
+
+		return y;
+	}
+}
+