using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;



namespace Microsoft.Research.DynamicDataDisplay.Charts.Axes.Numeric

{

	internal sealed class NumericConversion

	{

		private readonly double min;

		private readonly double length;

		private readonly double minValue;

		private readonly double valueLength;



		public NumericConversion(double min, double minValue, double max, double maxValue)

		{

			this.min = min;

			this.length = max - min;



			this.minValue = minValue;

			this.valueLength = maxValue - minValue;

		}



		public double FromDouble(double value)

		{

			double ratio = (value - min) / length;



			return minValue + ratio * valueLength;

		}



		public double ToDouble(double value)

		{

			double ratio = (value - minValue) / valueLength;



			return min + length * ratio;

		}

	}

}