Added MathHelper

- common Values of Pi
- Degree <-> Radians conversions

GlitchyEngine.Test/src/Math/MathHelperTest.bf

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+using System;
+using GlitchyEngine.Math;
+
+namespace GlitchyEngine.Test.Math
+{
+	static class MathHelperTest
+	{
+		[Test]
+		public static void TestDegToRad()
+		{
+			{
+				float deg = 0;
+				float rad = MathHelper.ToRadians(deg);
+				Test.Assert(rad == 0.0f);
+			}
+			
+			{
+				float deg = 45;
+				float rad = MathHelper.ToRadians(deg);
+				Test.Assert(rad == MathHelper.PiOverFour);
+			}
+			
+			{
+				float deg = 180;
+				float rad = MathHelper.ToRadians(deg);
+				Test.Assert(rad == MathHelper.Pi);
+			}
+
+			{
+				float deg = -360;
+				float rad = MathHelper.ToRadians(deg);
+				Test.Assert(rad == -MathHelper.TwoPi);
+			}
+		}
+
+		[Test]
+		public static void TestRadToDeg()
+		{
+			{
+				float rad = 0;
+				float deg = MathHelper.ToDegrees(rad);
+				Test.Assert(deg == 0.0f);
+			}
+			
+			{
+				float rad = MathHelper.PiOverFour;
+				float deg = MathHelper.ToDegrees(rad);
+				Test.Assert(deg == 45);
+			}
+			
+			{
+				float rad = MathHelper.Pi;
+				float deg = MathHelper.ToDegrees(rad);
+				Test.Assert(deg == 180);
+			}
+
+			{
+				float rad = -MathHelper.TwoPi;
+				float deg = MathHelper.ToDegrees(rad);
+				Test.Assert(deg == -360);
+			}
+		}
+	}
+}

GlitchyEngine/src/Math/MathHelper.bf

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+namespace GlitchyEngine.Math
+{
+	public static class MathHelper
+	{
+		public const float Pi = 3.14159265359f;
+		public const float TwoPi = 6.28318530718f;
+		public const float PiOverTwo = 1.57079632679f;
+		public const float PiOverThree = 1.0471975511965f;
+		public const float PiOverFour =  0.7853981633974f;
+
+		/// Converts radians to degrees
+		const float RadToDeg = 180.0f / Pi;
+
+		/// Converts radians to degrees
+		const float DegToRad = Pi / 180.0f;
+
+		// Converts the given radians to degrees
+		public static float ToDegrees(float radians)
+		{
+			return radians * RadToDeg;
+		}
+		
+		// Converts the given radians to degrees
+		public static Vector2 ToDegrees(Vector2 radians)
+		{
+			return radians * RadToDeg;
+		}
+		
+		// Converts the given radians to degrees
+		public static Vector3 ToDegrees(Vector3 radians)
+		{
+			return radians * RadToDeg;
+		}
+		
+		// Converts the given radians to degrees
+		public static Vector4 ToDegrees(Vector4 radians)
+		{
+			return radians * RadToDeg;
+		}
+
+		// Converts the given degrees to radians
+		public static float ToRadians(float degrees)
+		{
+			return degrees * DegToRad;
+		}
+
+		// Converts the given degrees to radians
+		public static Vector2 ToRadians(Vector2 degrees)
+		{
+			return degrees * DegToRad;
+		}
+
+		// Converts the given degrees to radians
+		public static Vector3 ToRadians(Vector3 degrees)
+		{
+			return degrees * DegToRad;
+		}
+
+		// Converts the given degrees to radians
+		public static Vector4 ToRadians(Vector4 degrees)
+		{
+			return degrees * DegToRad;
+		}
+	}
+}