Shifts the given value into the range

        

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;

namespace Microsoft.SqlServer.SpatialToolbox.KMLProcessor
{
  public class Utilities
  {
    /// <summary>
    /// This method shifts the given value into the range [-upperBorder, upperBorder]
    /// </summary>
    /// <param name="value">The value to be shifted</param>
    /// <param name="phase">The range's upper bound</param>
    /// <returns>The shifted value</returns>
    public static double ShiftInRange(double value, double upperBorder)
    {
      upperBorder = Math.Abs(upperBorder);

      if (upperBorder == 0)
        throw new Exception("The range has to be greater then 0.");

      double rangeSize = 2 * upperBorder;

      if (value > upperBorder)
      {
        int k = (int)((value + upperBorder) / rangeSize);
        value = value - k * rangeSize;
      }
      else if (value < -1 * upperBorder)
      {
        int k = (int)((value - upperBorder) / rangeSize);
        value = value - k * rangeSize;
      }

      return value;
    }
  }
}

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Shifts the given value into the range : double « Data Types « C# / C Sharp

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