Initial Commit

Common/Auxiliary/MathHelper.cs

@@ -0,0 +1,91 @@
+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;
+		}
+	}
+}