refactor: rearrange and add solution for 4-series

src/PepperDash.Essentials.Core/Ramps and Increments/NumericalHelpers.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Crestron.SimplSharp;
+
+namespace PepperDash.Essentials.Core
+{
+    public class NumericalHelpers 
+    {  
+        /// <summary>
+        /// Scales a value
+        /// </summary>
+        /// <param name="input"></param>
+        /// <param name="inMin"></param>
+        /// <param name="inMax"></param>
+        /// <param name="outMin"></param>
+        /// <param name="outMax"></param>
+        /// <returns></returns>
+        public static double Scale(double input, double inMin, double inMax, double outMin, double outMax)
+        {
+            //Debug.Console(2, this, "Scaling (double) input '{0}' with min '{1}'/max '{2}' to output range min '{3}'/max '{4}'", input, inMin, inMax, outMin, outMax);
+
+            double inputRange = inMax - inMin;
+
+            if (inputRange <= 0)
+            {
+                throw new ArithmeticException(string.Format("Invalid Input Range '{0}' for Scaling.  Min '{1}' Max '{2}'.", inputRange, inMin, inMax));
+            }
+
+            double outputRange = outMax - outMin;
+
+            var output = (((input - inMin) * outputRange) / inputRange) + outMin;
+
+           // Debug.Console(2, this, "Scaled output '{0}'", output);
+
+            return output;
+        }
+    }
+}