source: branches/HeuristicLab.Problems.GrammaticalOptimization/DynamicDataDisplay/Common/Auxiliary/MathHelper.cs @ 13348

using System;
using System.Windows;

namespace Microsoft.Research.DynamicDataDisplay
{
  public static class MathHelper
  {
    public static long Clamp(long value, long min, long max)
    {
      return Math.Max(min, Math.Min(value, max));
    }

    public static double Clamp(double value, double min, double max)
    {
      return Math.Max(min, Math.Min(value, max));
    }

    /// <summary>Clamps specified value to [0,1]</summary>
    /// <param name="d">Value to clamp</param>
    /// <returns>Value in range [0,1]</returns>
    public static double Clamp(double value)
    {
      return Math.Max(0, Math.Min(value, 1));
    }

    public static int Clamp(int value, int min, int max)
    {
      return Math.Max(min, Math.Min(value, max));
    }

    public static Rect CreateRectByPoints(double xMin, double yMin, double xMax, double yMax)
    {
      return new Rect(new Point(xMin, yMin), new Point(xMax, yMax));
    }

    public static double Interpolate(double start, double end, double ratio)
    {
      return start * (1 - ratio) + end * ratio;
    }

    public static double RadiansToDegrees(this double radians)
    {
      return radians * 180 / Math.PI;
    }

    public static double DegreesToRadians(this double degrees)
    {
      return degrees / 180 * Math.PI;
    }

    /// <summary>
    /// Converts vector into angle.
    /// </summary>
    /// <param name="vector">The vector.</param>
    /// <returns>Angle in degrees.</returns>
    public static double ToAngle(this Vector vector)
    {
      return Math.Atan2(-vector.Y, vector.X).RadiansToDegrees();
    }

    public static Point ToPoint(this Vector v)
    {
      return new Point(v.X, v.Y);
    }

    public static bool IsNaN(this double d)
    {
      return Double.IsNaN(d);
    }

    public static bool IsNotNaN(this double d)
    {
      return !Double.IsNaN(d);
    }

    public static bool IsFinite(this double d)
    {
      return !Double.IsNaN(d) && !Double.IsInfinity(d);
    }

    public static bool IsInfinite(this double d)
    {
      return Double.IsInfinity(d);
    }

    public static bool AreClose(double d1, double d2, double diffRatio)
    {
      return Math.Abs(d1 / d2 - 1) < diffRatio;
    }
  }
}