Add project files.

PveTeam.Math.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.8.34309.116
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PveTeam.Math", "PveTeam.Math\PveTeam.Math.csproj", "{D875C780-DB5A-4252-94DE-6C6BA7C78A0F}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{D875C780-DB5A-4252-94DE-6C6BA7C78A0F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D875C780-DB5A-4252-94DE-6C6BA7C78A0F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D875C780-DB5A-4252-94DE-6C6BA7C78A0F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D875C780-DB5A-4252-94DE-6C6BA7C78A0F}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {D629AF92-13DF-4560-9245-41A14AA9781C}
+	EndGlobalSection
+EndGlobal

PveTeam.Math/Matrix4x4D.cs

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+using System;
+using System.Numerics;
+
+namespace PveTeam.Math
+{
+    public struct Matrix4x4D : IEquatable<Matrix4x4>
+    {
+        public Double M11, M12, M13, M14,
+            M21, M22, M23, M24,
+            M31, M32, M33, M34,
+            M41, M42, M43, M44;
+    }
+}

PveTeam.Math/PveTeam.Math.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.1</TargetFramework>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

PveTeam.Math/QuaternionD.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace PveTeam.Math
+{
+    public struct QuaternionD
+    {
+    }
+}

PveTeam.Math/Vector3D.cs

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+using System.Numerics;
+using System;
+
+namespace PveTeam.Math
+{
+    public struct Vector3D : IEquatable<Vector3>, IFormattable
+    {
+        public Double X, Y, Z;
+
+        public Vector3D(double value) : this(value, value, value) { }
+
+        public Vector3D(Double x, Double y, Double z)
+        {
+            X = x;
+            Y = y;
+            Z = z;
+        }
+
+        public bool Equals(Vector3 other)
+        {
+            throw new NotImplementedException();
+        }
+
+        public string ToString(string format, IFormatProvider formatProvider)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

readme.md

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+no hardware acceleration but useful to not be bound to keen faggotery