Boundingbox is in

CSMath.Tests/BoundingBoxTests.cs

@@ -0,0 +1,35 @@
+using Xunit;
+
+namespace CSMath.Tests
+{
+	public class BoundingBoxTests
+	{
+		[Theory]
+		[InlineData(0, 0, 0, true)]
+		[InlineData(11, 0, 0, false)]
+		[InlineData(11, 0, -11, false)]
+		[InlineData(5, 0, 5, true)]
+		[InlineData(10, 10, 10, true)]
+		public void IsInPointTest(double x, double y, double z, bool isIn)
+		{
+			BoundingBox box = new BoundingBox(-10, -10, -10, 10, 10, 10);
+
+			XYZ xyz = new XYZ(x, y, z);
+			Assert.Equal(isIn, box.IsIn(xyz));
+		}
+
+		[Theory]
+		[InlineData(-10, -10, -10, 10, 10, 10, true, true)]
+		[InlineData(-5, -5, -5, 5, 5, 5, true, true)]
+		[InlineData(-5, -5, -5, 5, 50, 50, false, true)]
+		[InlineData(-50, -60, -50, -11, -11, -11, false, false)]
+		public void IsInBoxTest(double minX, double minY, double minZ, double maxX, double maxY, double maxZ, bool isIn, bool partialInside)
+		{
+			BoundingBox box = new BoundingBox(-10, -10, -10, 10, 10, 10);
+
+			BoundingBox test = new BoundingBox(minX, minY, minZ, maxX, maxY, maxZ);
+			Assert.Equal(isIn, box.IsIn(test, out bool partialyIn));
+			Assert.Equal(partialInside, partialyIn);
+		}
+	}
+}

CSMath.Tests/QuaternionTests.cs

@@ -7,7 +7,7 @@ public class QuaternionTests
 		[Fact]
 		public void CreateFromYawPitchRollTest()
 		{
-			XYZ xyz = new XYZ(Utilities.DegToRad(90), 0, 0);
+			XYZ xyz = new XYZ(MathHelper.DegToRad(90), 0, 0);
 			Quaternion q = Quaternion.CreateFromYawPitchRoll(xyz);
 		}
 	}

CSMath/BoundingBox.cs

@@ -115,6 +115,52 @@ public BoundingBox Merge(BoundingBox box)
 			return new BoundingBox(min, max);
 		}
 
+		/// <summary>
+		/// Checks if the given box is in the bounds of this box.
+		/// </summary>
+		/// <param name="box"></param>
+		/// <returns></returns>
+		public bool IsIn(BoundingBox box)
+		{
+			return this.IsIn(box, out _);
+		}
+
+		/// <summary>
+		/// Checks if the given box is in the bounds of this box.
+		/// </summary>
+		/// <param name="box"></param>
+		/// <param name="partialIn">Flag to notify that on part of the box is inside but not completely.</param>
+		/// <returns></returns>
+		public bool IsIn(BoundingBox box, out bool partialIn)
+		{
+			bool min = this.IsIn(box.Min);
+			bool max = this.IsIn(box.Max);
+
+			partialIn = min || max;
+
+			return min && max;
+		}
+
+		/// <summary>
+		/// Checks if the point is in the bounds of the box.
+		/// </summary>
+		/// <param name="point"></param>
+		/// <returns></returns>
+		public bool IsIn(XYZ point)
+		{
+			if (this.Min.X > point.X || this.Min.Y > point.Y || this.Min.Z > point.Z)
+			{
+				return false;
+			}
+
+			if (this.Max.X < point.X || this.Max.Y < point.Y || this.Max.Z < point.Z)
+			{
+				return false;
+			}
+
+			return true;
+		}
+
 		/// <summary>
 		/// Merge Multiple boxes into the common one.
 		/// </summary>

CSMath/CSMath.projitems

@@ -17,7 +17,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)IVector.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Matrix4.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Matrix4.Operators.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Utilities.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)MathHelper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Quaternion.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Transform.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)VectorExtensions.cs" />

CSMath/Utilities.cs → CSMath/MathHelper.cs

@@ -2,7 +2,7 @@
 
 namespace CSMath
 {
-	public static class Utilities
+	public static class MathHelper
 	{
 		/// <summary>
 		/// Factor for converting radians to degrees.

CSMath/Transform.cs

@@ -60,9 +60,9 @@ public Quaternion Quaternion
 			get
 			{
 				XYZ rot = new XYZ();
-				rot[0] = Utilities.DegToRad(this._rotation.X);
-				rot[1] = Utilities.DegToRad(this._rotation.Y);
-				rot[2] = Utilities.DegToRad(this._rotation.Z);
+				rot[0] = MathHelper.DegToRad(this._rotation.X);
+				rot[1] = MathHelper.DegToRad(this._rotation.Y);
+				rot[2] = MathHelper.DegToRad(this._rotation.Z);
 				return Quaternion.CreateFromYawPitchRoll(rot);
 			}
 		}

CSMath/VectorExtensions.cs

@@ -361,7 +361,7 @@ public static T RoundZero<T>(this T vector)
 
 			for (int i = 0; i < result.Dimension; i++)
 			{
-				result[i] = Utilities.IsZero(vector[i]) ? 0 : vector[i];
+				result[i] = MathHelper.IsZero(vector[i]) ? 0 : vector[i];
 			}
 
 			return result;