attempt opentk4

GLWidget.sln

@@ -5,6 +5,8 @@ VisualStudioVersion = 16.0.29709.97
 MinimumVisualStudioVersion = 15.0.26124.0
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GLWidget", "GLWidget\GLWidget.csproj", "{2F1DF6C0-67E9-4ADF-B2DA-F3E1504CF57B}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GLWidgetTestGTK3", "GLWidgetTestGTK3\GLWidgetTestGTK3.csproj", "{227DE1F9-A40A-440A-9A06-4AA5532DBA17}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,6 +29,18 @@ Global
 		{2F1DF6C0-67E9-4ADF-B2DA-F3E1504CF57B}.Release|x64.Build.0 = Release|Any CPU
 		{2F1DF6C0-67E9-4ADF-B2DA-F3E1504CF57B}.Release|x86.ActiveCfg = Release|Any CPU
 		{2F1DF6C0-67E9-4ADF-B2DA-F3E1504CF57B}.Release|x86.Build.0 = Release|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Debug|x64.Build.0 = Debug|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Debug|x86.Build.0 = Debug|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Release|Any CPU.ActiveCfg = Debug|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Release|Any CPU.Build.0 = Debug|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Release|x64.ActiveCfg = Debug|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Release|x64.Build.0 = Debug|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Release|x86.ActiveCfg = Debug|Any CPU
+		{227DE1F9-A40A-440A-9A06-4AA5532DBA17}.Release|x86.Build.0 = Debug|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

GLWidget/GLWidget.cs

@@ -35,9 +35,11 @@ using System.ComponentModel;
 
 
 using OpenTK.Graphics;
-using OpenTK.Platform;
+using OpenTK.Graphics.OpenGL;
+
 
 using Gtk;
+using Cairo;
 
 namespace OpenTK
 {
@@ -56,78 +58,41 @@ namespace OpenTK
 
 		#region Attributes
 
-		private IGraphicsContext _graphicsContext;
-		private IWindowInfo _windowInfo;
 		private bool _initialized;
 
 		#endregion
 
 		#region Properties
 
-		/// <summary>Use a single buffer versus a double buffer.</summary>
-		[Browsable(true)]
-		public bool SingleBuffer { get; set; }
-
-		/// <summary>Color Buffer Bits-Per-Pixel</summary>
-		public int ColorBPP { get; set; }
-
-		/// <summary>Accumulation Buffer Bits-Per-Pixel</summary>
-		public int AccumulatorBPP { get; set; }
-
-		/// <summary>Depth Buffer Bits-Per-Pixel</summary>
-		public int DepthBPP { get; set; }
-
-		/// <summary>Stencil Buffer Bits-Per-Pixel</summary>
-		public int StencilBPP { get; set; }
-
-		/// <summary>Number of samples</summary>
-		public int Samples { get; set; }
-
-		/// <summary>Indicates if steropic renderering is enabled</summary>
-		public bool Stereo { get; set; }
-
 		/// <summary>The major version of OpenGL to use.</summary>
 		public int GLVersionMajor { get; set; }
 
 		/// <summary>The minor version of OpenGL to use.</summary>
 		public int GLVersionMinor { get; set; }
 
-		public GraphicsContextFlags GraphicsContextFlags
+        private int _framebuffer;
-		{
+        private int _renderbuffer;
-			get;
+        private int _stencilbuffer;
-			set;
+
-		}
+        public Gdk.GLContext GraphicsContext { get; set; }
+        public bool ForwardCompatible { get; }
 
         #endregion
 
         #region Construction/Destruction
 
-		/// <summary>Constructs a new GLWidget.</summary>
+        /// <summary>Constructs a new GLWidget</summary>
-		public GLWidget()
+        public GLWidget() : this(new Version(4, 0), true)
-			: this(GraphicsMode.Default)
         {
-		}
 
-		/// <summary>Constructs a new GLWidget using a given GraphicsMode</summary>
-		public GLWidget(GraphicsMode graphicsMode)
-			: this(graphicsMode, 1, 0, GraphicsContextFlags.Default)
-		{
         }
 
         /// <summary>Constructs a new GLWidget</summary>
-		public GLWidget(GraphicsMode graphicsMode, int glVersionMajor, int glVersionMinor, GraphicsContextFlags graphicsContextFlags)
+        public GLWidget(Version apiVersion, bool forwardCompatible)
 		{
-			SingleBuffer = graphicsMode.Buffers == 1;
+			GLVersionMajor = apiVersion.Major;
-			ColorBPP = graphicsMode.ColorFormat.BitsPerPixel;
+			GLVersionMinor = apiVersion.Minor;
-			AccumulatorBPP = graphicsMode.AccumulatorFormat.BitsPerPixel;
+            ForwardCompatible = forwardCompatible;
-			DepthBPP = graphicsMode.Depth;
-			StencilBPP = graphicsMode.Stencil;
-			Samples = graphicsMode.Samples;
-			Stereo = graphicsMode.Stereo;
-
-			GLVersionMajor = glVersionMajor;
-			GLVersionMinor = glVersionMinor;
-			GraphicsContextFlags = graphicsContextFlags;
         }
 
 		~GLWidget()
@@ -139,22 +104,8 @@ namespace OpenTK
 		{
 			if (disposing)
 			{
-				try
-				{
-					GraphicsContext.MakeCurrent(WindowInfo);
-				}catch(Exception ex)
-				{
-
-				}
-
 				OnShuttingDown();
 				
-				if (OpenTK.Graphics.GraphicsContext.ShareContexts && (Interlocked.Decrement(ref _graphicsContextCount) == 0))
-				{
-					OnGraphicsContextShuttingDown();
-					_sharedContextInitialized = false;
-				}
-				
 				GraphicsContext.Dispose();
 			}
 		}
@@ -201,10 +152,7 @@ namespace OpenTK
 
 		protected virtual void OnRenderFrame()
 		{
-			if (RenderFrame != null)
+            RenderFrame?.Invoke(this, EventArgs.Empty);
-			{
-				RenderFrame(this, EventArgs.Empty);
-			}
         }
 
 		// Called when this GLWidget is being Disposed
@@ -220,9 +168,6 @@ namespace OpenTK
 
 		#endregion
 
-		// Called when a widget is realized. (window handles and such are valid)
-		// protected override void OnRealized() { base.OnRealized(); }
-
 		// Called when the widget needs to be (fully or partially) redrawn.
 
 		protected override bool OnDrawn(Cairo.Context cr)
@@ -230,324 +175,106 @@ namespace OpenTK
 			if (!_initialized)
 				Initialize();
 			else if (!IsRenderHandler)
-				GraphicsContext.MakeCurrent(WindowInfo);
+            {
+                MakeCurrent();
+            }
+
+            cr.SetSourceColor(new Color(0, 0, 0, 1));
+            cr.Paint();
+
+            var scale = this.ScaleFactor;
+
+            Gdk.CairoHelper.DrawFromGl(cr, this.Window, _renderbuffer, (int)ObjectLabelIdentifier.Renderbuffer, scale, 0, 0, AllocatedWidth, AllocatedHeight);
 
             return true;
 		}
 
+        public void Swapbuffers()
+        {
+            GL.Flush();
+
+            QueueDraw();
+        }
+
+        public void MakeCurrent()
+        {
+            GraphicsContext?.MakeCurrent();
+            GL.BindFramebuffer(FramebufferTarget.Framebuffer, _framebuffer);
+        }
+
+        public void ClearCurrent()
+        {
+            Gdk.GLContext.ClearCurrent();
+        }
+
         // Called on Resize
         protected override bool OnConfigureEvent(Gdk.EventConfigure evnt)
 		{
 			if (GraphicsContext != null)
 			{
-				GraphicsContext.Update(WindowInfo);
+                MakeCurrent();
+
+                GraphicsContext.Window.Resize(evnt.X, evnt.Y);
+
+                DeleteBuffers();
+
+                CreateFramebuffer();
             }
 
 			return true;
 		}
 
+        private void DeleteBuffers()
+        {
+            if (_framebuffer != 0)
+            {
+                GL.DeleteFramebuffer(_framebuffer);
+                GL.DeleteRenderbuffer(_renderbuffer);
+            }
+        }
+
+        private void CreateFramebuffer()
+        {
+            _framebuffer = GL.GenFramebuffer();
+            GL.BindFramebuffer(FramebufferTarget.Framebuffer, _framebuffer);
+
+            _renderbuffer = GL.GenRenderbuffer();
+            GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, _renderbuffer);
+            GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, RenderbufferStorage.Rgba8, AllocatedWidth, AllocatedHeight);
+
+            GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, RenderbufferTarget.Renderbuffer, _renderbuffer);
+
+            _stencilbuffer = GL.GenRenderbuffer();
+            GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, _stencilbuffer);
+            GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, RenderbufferStorage.Depth24Stencil8, AllocatedWidth, AllocatedHeight);
+
+            GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthStencilAttachment, RenderbufferTarget.Renderbuffer, _stencilbuffer);
+
+            GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, 0);
+            var state = GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
+        }
+
         private void Initialize()
 		{
 			_initialized = true;
 
-			// If this looks uninitialized...  initialize.
-			if (ColorBPP == 0)
-			{
-				ColorBPP = 32;
-
-				if (DepthBPP == 0)
-				{
-					DepthBPP = 16;
-				}
-			}
-
-			ColorFormat colorBufferColorFormat = new ColorFormat(ColorBPP);
-
-			ColorFormat accumulationColorFormat = new ColorFormat(AccumulatorBPP);
-
-			int buffers = 2;
-			if (SingleBuffer)
-			{
-				buffers--;
-			}
-
-			GraphicsMode graphicsMode = new GraphicsMode(colorBufferColorFormat, DepthBPP, StencilBPP, Samples, accumulationColorFormat, buffers, Stereo);
-
 			this.Window.EnsureNative();
 
-			// IWindowInfo
+            GraphicsContext = Window.CreateGlContext();
-			if (OpenTK.Configuration.RunningOnWindows)
-			{
-				WindowInfo = InitializeWindows();
-			}
-			else if (OpenTK.Configuration.RunningOnMacOS)
-			{
-				WindowInfo = InitializeOSX();
-			}
-			else
-			{
-				WindowInfo = InitializeX(graphicsMode);
-			}
 
-			// GraphicsContext
+            GraphicsContext.SetRequiredVersion(GLVersionMajor, GLVersionMinor);
-			GraphicsContext = new GraphicsContext(graphicsMode, WindowInfo, GLVersionMajor, GLVersionMinor, GraphicsContextFlags);
-			GraphicsContext.MakeCurrent(WindowInfo);
 
-			if (OpenTK.Graphics.GraphicsContext.ShareContexts)
+            GraphicsContext.SetUseEs(0);
-			{
-				Interlocked.Increment(ref _graphicsContextCount);
 
-				if (!_sharedContextInitialized)
+            GraphicsContext.ForwardCompatible = ForwardCompatible;
-				{
+
-					_sharedContextInitialized = true;
+            GraphicsContext.Realize();
-					((IGraphicsContextInternal)GraphicsContext).LoadAll();
+
-					OnGraphicsContextInitialized();
+            GraphicsContext.MakeCurrent();
-				}
+
-			}
+            CreateFramebuffer();
-			else
-			{
-				((IGraphicsContextInternal)GraphicsContext).LoadAll();
-				OnGraphicsContextInitialized();
-			}
 
             OnInitialized();
 		}
-
-		#region Windows Specific initalization
-
-		IWindowInfo InitializeWindows()
-		{
-			IntPtr windowHandle = gdk_win32_window_get_handle(this.Window.Handle);
-			return Utilities.CreateWindowsWindowInfo(windowHandle);
-		}
-
-		[SuppressUnmanagedCodeSecurity, DllImport("libgdk-3-0.dll")]
-		public static extern IntPtr gdk_win32_window_get_handle(IntPtr d);
-
-		#endregion
-
-		#region OSX Specific Initialization
-
-		IWindowInfo InitializeOSX()
-		{
-			IntPtr windowHandle = gdk_quartz_window_get_nswindow(this.Window.Handle);
-			//IntPtr viewHandle = gdk_quartz_window_get_nsview(this.GdkWindow.Handle);
-			return Utilities.CreateMacOSWindowInfo(windowHandle);
-		}
-
-		[SuppressUnmanagedCodeSecurity, DllImport("libgdk-3.0.dylib")]
-		static extern IntPtr gdk_quartz_window_get_nswindow(IntPtr handle);
-
-		[SuppressUnmanagedCodeSecurity, DllImport("libgdk-3.0.dylib")]
-		static extern IntPtr gdk_quartz_window_get_nsview(IntPtr handle);
-
-		#endregion
-
-		#region X Specific Initialization
-
-		const string UnixLibGdkName = "libgdk-3.so.0";
-
-		const string UnixLibX11Name = "libX11.so.6";
-		const string UnixLibGLName = "libGL.so.1";
-
-		const int GLX_NONE = 0;
-		const int GLX_USE_GL = 1;
-		const int GLX_BUFFER_SIZE = 2;
-		const int GLX_LEVEL = 3;
-		const int GLX_RGBA = 4;
-		const int GLX_DOUBLEBUFFER = 5;
-		const int GLX_STEREO = 6;
-		const int GLX_AUX_BUFFERS = 7;
-		const int GLX_RED_SIZE = 8;
-		const int GLX_GREEN_SIZE = 9;
-		const int GLX_BLUE_SIZE = 10;
-		const int GLX_ALPHA_SIZE = 11;
-		const int GLX_DEPTH_SIZE = 12;
-		const int GLX_STENCIL_SIZE = 13;
-		const int GLX_ACCUM_RED_SIZE = 14;
-		const int GLX_ACCUM_GREEN_SIZE = 15;
-		const int GLX_ACCUM_BLUE_SIZE = 16;
-		const int GLX_ACCUM_ALPHA_SIZE = 17;
-
-		public enum XVisualClass
-		{
-			StaticGray = 0,
-			GrayScale = 1,
-			StaticColor = 2,
-			PseudoColor = 3,
-			TrueColor = 4,
-			DirectColor = 5,
-		}
-
-		[StructLayout(LayoutKind.Sequential)]
-		struct XVisualInfo
-		{
-			public IntPtr Visual;
-			public IntPtr VisualID;
-			public int Screen;
-			public int Depth;
-			public XVisualClass Class;
-			public long RedMask;
-			public long GreenMask;
-			public long blueMask;
-			public int ColormapSize;
-			public int BitsPerRgb;
-
-			public override string ToString()
-			{
-				return $"id ({VisualID}), screen ({Screen}), depth ({Depth}), class ({Class})";
-			}
-		}
-
-		[Flags]
-		internal enum XVisualInfoMask
-		{
-			No = 0x0,
-			ID = 0x1,
-			Screen = 0x2,
-			Depth = 0x4,
-			Class = 0x8,
-			Red = 0x10,
-			Green = 0x20,
-			Blue = 0x40,
-			ColormapSize = 0x80,
-			BitsPerRGB = 0x100,
-			All = 0x1FF,
-		}
-
-		private IWindowInfo InitializeX(GraphicsMode mode)
-		{
-			IntPtr display = gdk_x11_display_get_xdisplay(Display.Handle);
-			int screen = Screen.Number;
-
-			IntPtr windowHandle = gdk_x11_window_get_xid(Window.Handle);
-			IntPtr rootWindow   = gdk_x11_window_get_xid(RootWindow.Handle);
-
-			IntPtr visualInfo;
-
-			if (mode.Index.HasValue)
-			{
-				XVisualInfo info = new XVisualInfo();
-				info.VisualID = mode.Index.Value;
-				int dummy;
-				visualInfo = XGetVisualInfo(display, XVisualInfoMask.ID, ref info, out dummy);
-			}
-			else
-			{
-				visualInfo = GetVisualInfo(display);
-			}
-
-			IWindowInfo retval = Utilities.CreateX11WindowInfo(display, screen, windowHandle, rootWindow, visualInfo);
-			XFree(visualInfo);
-
-			return retval;
-		}
-
-		private static IntPtr XGetVisualInfo(IntPtr display, XVisualInfoMask vinfo_mask, ref XVisualInfo template, out int nitems)
-		{
-			return XGetVisualInfoInternal(display, (IntPtr)(int)vinfo_mask, ref template, out nitems);
-		}
-
-		private IntPtr GetVisualInfo(IntPtr display)
-		{
-			try
-			{
-				int[] attributes = AttributeList.ToArray();
-				return glXChooseVisual(display, Screen.Number, attributes);
-			}
-			catch (DllNotFoundException e)
-			{
-				throw new DllNotFoundException("OpenGL dll not found!", e);
-			}
-			catch (EntryPointNotFoundException enf)
-			{
-				throw new EntryPointNotFoundException("Glx entry point not found!", enf);
-			}
-		}
-
-		private List<int> AttributeList
-		{
-			get
-			{
-				List<int> attributeList = new List<int>(24);
-
-				attributeList.Add(GLX_RGBA);
-
-				if (!SingleBuffer)
-					attributeList.Add(GLX_DOUBLEBUFFER);
-
-				if (Stereo)
-					attributeList.Add(GLX_STEREO);
-
-				attributeList.Add(GLX_RED_SIZE);
-				attributeList.Add(ColorBPP / 4); // TODO support 16-bit
-
-				attributeList.Add(GLX_GREEN_SIZE);
-				attributeList.Add(ColorBPP / 4); // TODO support 16-bit
-
-				attributeList.Add(GLX_BLUE_SIZE);
-				attributeList.Add(ColorBPP / 4); // TODO support 16-bit
-
-				attributeList.Add(GLX_ALPHA_SIZE);
-				attributeList.Add(ColorBPP / 4); // TODO support 16-bit
-
-				attributeList.Add(GLX_DEPTH_SIZE);
-				attributeList.Add(DepthBPP);
-
-				attributeList.Add(GLX_STENCIL_SIZE);
-				attributeList.Add(StencilBPP);
-
-				attributeList.Add(GLX_ACCUM_RED_SIZE);
-				attributeList.Add(AccumulatorBPP / 4);// TODO support 16-bit
-
-				attributeList.Add(GLX_ACCUM_GREEN_SIZE);
-				attributeList.Add(AccumulatorBPP / 4);// TODO support 16-bit
-
-				attributeList.Add(GLX_ACCUM_BLUE_SIZE);
-				attributeList.Add(AccumulatorBPP / 4);// TODO support 16-bit
-
-				attributeList.Add(GLX_ACCUM_ALPHA_SIZE);
-				attributeList.Add(AccumulatorBPP / 4);// TODO support 16-bit
-
-				attributeList.Add(GLX_NONE);
-
-				return attributeList;
-			}
-		}
-
-		public IGraphicsContext GraphicsContext { get => _graphicsContext; set => _graphicsContext = value; }
-		public IWindowInfo WindowInfo { get => _windowInfo; set => _windowInfo = value; }
-
-		[DllImport(UnixLibX11Name, EntryPoint = "XGetVisualInfo")]
-		private static extern IntPtr XGetVisualInfoInternal(IntPtr display, IntPtr vinfo_mask, ref XVisualInfo template, out int nitems);
-
-		[SuppressUnmanagedCodeSecurity, DllImport(UnixLibX11Name)]
-		private static extern void XFree(IntPtr handle);
-
-		/// <summary> Returns the X resource (window or pixmap) belonging to a GdkDrawable. </summary>
-		/// <remarks> XID gdk_x11_drawable_get_xid(GdkDrawable *drawable); </remarks>
-		/// <param name="gdkDisplay"> The GdkDrawable. </param>
-		/// <returns> The ID of drawable's X resource. </returns>
-		[SuppressUnmanagedCodeSecurity, DllImport(UnixLibGdkName)]
-		private static extern IntPtr gdk_x11_drawable_get_xid(IntPtr gdkDisplay);
-
-		/// <summary> Returns the X resource (window or pixmap) belonging to a GdkDrawable. </summary>
-		/// <remarks> XID gdk_x11_drawable_get_xid(GdkDrawable *drawable); </remarks>
-		/// <param name="gdkDisplay"> The GdkDrawable. </param>
-		/// <returns> The ID of drawable's X resource. </returns>
-		[SuppressUnmanagedCodeSecurity, DllImport(UnixLibGdkName)]
-		private static extern IntPtr gdk_x11_window_get_xid(IntPtr gdkDisplay);
-
-		/// <summary> Returns the X display of a GdkDisplay. </summary>
-		/// <remarks> Display* gdk_x11_display_get_xdisplay(GdkDisplay *display); </remarks>
-		/// <param name="gdkDisplay"> The GdkDrawable. </param>
-		/// <returns> The X Display of the GdkDisplay. </returns>
-		[SuppressUnmanagedCodeSecurity, DllImport(UnixLibGdkName)]
-		private static extern IntPtr gdk_x11_display_get_xdisplay(IntPtr gdkDisplay);
-
-		[SuppressUnmanagedCodeSecurity, DllImport(UnixLibGLName)]
-		private static extern IntPtr glXChooseVisual(IntPtr display, int screen, int[] attr);
-
-		#endregion
 	}
 }

GLWidget/GLWidget.csproj

@@ -1,5 +1,4 @@
 <Project Sdk="Microsoft.NET.Sdk">
-
   <PropertyGroup>
     <TargetFramework>netstandard2.1</TargetFramework>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
@@ -7,10 +6,9 @@
     <Version>1.0.1</Version>
     <RepositoryUrl>https://github.com/Ryujinx/GLWidget</RepositoryUrl>
   </PropertyGroup>
-
   <ItemGroup>
     <PackageReference Include="GtkSharp" Version="3.22.25.56" />
-    <PackageReference Include="OpenTK.NetStandard" Version="1.0.5.12" />
+    <PackageReference Include="OpenTK.Graphics" Version="4.0.0-pre9.4" />
+    <PackageReference Include="OpenTK.Windowing.Common" Version="4.0.0-pre9.4" />
   </ItemGroup>
-
 </Project>

GLWidgetTestGTK3/Data/RGB.cs

@@ -0,0 +1,49 @@
+//
+//  Vertex.cs
+//
+//  Author:
+//       Jarl Gullberg <jarl.gullberg@gmail.com>
+//
+//  Copyright (c) 2016 Jarl Gullberg
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+namespace GLWidgetTestGTK3.Data
+{
+	public class RGB
+	{
+		public float R
+		{
+			get; set;
+		}
+
+		public float G
+		{
+			get; set;
+		}
+
+		public float B
+		{
+			get; set;
+		}
+
+		public RGB(float R, float G, float B)
+		{
+			this.R = R;
+			this.G = G;
+			this.B = B;
+		}
+	}
+}

GLWidgetTestGTK3/Data/Transform.cs

@@ -0,0 +1,61 @@
+//
+//  Transform.cs
+//
+//  Author:
+//       Jarl Gullberg <jarl.gullberg@gmail.com>
+//
+//  Copyright (c) 2016 Jarl Gullberg
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//using System.Net;
+
+
+using System;
+using OpenTK.Mathematics;
+
+namespace GLWidgetTestGTK3.Data
+{
+	public class Transform
+	{
+		public Vector3 Translation
+		{
+			get;
+			set;
+		}
+
+		public Quaternion Rotation
+		{
+			get;
+			set;
+		}
+
+		public Vector3 Scale
+		{
+			get;
+			set;
+		}
+
+		public Transform(Vector3 Translation)
+			: this(Translation, Quaternion.FromAxisAngle(Vector3.UnitX, 0.0f), Vector3.One)
+		{
+		}
+
+		public Transform(Vector3 Translation, Quaternion Rotation, Vector3 Scale)
+		{
+			this.Translation = Translation;
+			this.Rotation = Rotation;
+			this.Scale = Scale;
+		}
+	}
+}

GLWidgetTestGTK3/Data/UVCoordinate.cs

@@ -0,0 +1,47 @@
+//
+//  UVCoordinate.cs
+//
+//  Author:
+//       Jarl Gullberg <jarl.gullberg@gmail.com>
+//
+//  Copyright (c) 2016 Jarl Gullberg
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+using System;
+
+namespace GLWidgetTestGTK3.Data
+{
+	public sealed class UVCoordinate
+	{
+		public float U
+		{
+			get;
+			set;
+		}
+
+		public float V
+		{
+			get;
+			set;
+		}
+
+		public UVCoordinate(float U, float V)
+		{
+			this.U = U;
+			this.V = V;
+		}
+	}
+}

GLWidgetTestGTK3/Data/Vertex.cs

@@ -0,0 +1,92 @@
+//
+//  Vertex.cs
+//
+//  Author:
+//       Jarl Gullberg <jarl.gullberg@gmail.com>
+//
+//  Copyright (c) 2016 Jarl Gullberg
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+using OpenTK.Mathematics;
+
+namespace GLWidgetTestGTK3.Data
+{
+	public sealed class Vertex
+	{
+		public Vector3 Position
+		{
+			get;
+			private set;
+		}
+
+		public Vector3 Normal
+		{
+			get;
+			private set;
+		}
+
+		public UVCoordinate UVCoordinate
+		{
+			get;
+			private set;
+		}
+
+		public RGB VertexColour
+		{
+			get;
+			private set;
+		}
+
+		public Vertex(Vector3 Position)
+			:this(Position, Vector3.Zero, new UVCoordinate(0.0f, 0.0f), new RGB(1.0f, 1.0f, 1.0f))
+		{
+		}
+
+		public Vertex(Vector3 Position, Vector3 Normal)
+        			:this(Position, Normal, new UVCoordinate(0.0f, 0.0f), new RGB(1.0f, 1.0f, 1.0f))
+		{
+		}
+
+
+		public Vertex(Vector3 Position, RGB VertexColour)
+			:this(Position, Vector3.Zero, new UVCoordinate(0.0f, 0.0f), VertexColour)
+		{
+		}
+
+		public Vertex(Vector3 Position, Vector3 Normal, RGB VertexColour)
+        			:this(Position, Normal, new UVCoordinate(0.0f, 0.0f), VertexColour)
+		{
+		}
+
+		public Vertex(Vector3 Position, UVCoordinate UVCoordinate)
+			:this(Position, Vector3.Zero, UVCoordinate, new RGB(1.0f, 1.0f, 1.0f))
+		{
+		}
+
+		public Vertex(Vector3 Position, Vector3 Normal, UVCoordinate UVCoordinate)
+        			:this(Position, Normal, UVCoordinate, new RGB(1.0f, 1.0f, 1.0f))
+		{
+		}
+
+		public Vertex(Vector3 Position, Vector3 Normal, UVCoordinate UVCoordinate, RGB VertexColour)
+		{
+			this.Position = Position;
+			this.Normal = Normal;
+			this.UVCoordinate = UVCoordinate;
+			this.VertexColour = VertexColour;
+		}
+	}
+}

GLWidgetTestGTK3/Extensions/ExtensionMethods.cs

@@ -0,0 +1,41 @@
+//
+//  ExtensionMethods.cs
+//
+//  Author:
+//       Jarl Gullberg <jarl.gullberg@gmail.com>
+//
+//  Copyright (c) 2016 Jarl Gullberg
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+using OpenTK.Mathematics;
+
+namespace GLWidgetTestGTK3.Extensions
+{
+	public static class ExtensionMethods
+	{
+		public static Quaternion QuaternionFromEuler(float Yaw, float Pitch, float Roll)
+		{
+			Quaternion XRotation = Quaternion.FromAxisAngle(Vector3.UnitX, Yaw);
+			Quaternion YRotation = Quaternion.FromAxisAngle(Vector3.UnitY, Pitch);
+			Quaternion ZRotation = Quaternion.FromAxisAngle(Vector3.UnitZ, Roll);
+
+			Quaternion final = Quaternion.Multiply(ZRotation, YRotation);
+			final = Quaternion.Multiply(XRotation, final);
+
+			return final;
+		}
+	}
+}

GLWidgetTestGTK3/GLWidgetTestGTK3.csproj

@@ -0,0 +1,39 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <LangVersion>8.0</LangVersion>
+    <RuntimeIdentifiers>win-x64;osx-x64;linux-x64</RuntimeIdentifiers>
+    <OutputType>Exe</OutputType>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <Configurations>Debug;Release</Configurations>
+    <RootNamespace>GLWidgetTestGTK3</RootNamespace>
+    <StartupObject>GLWidgetTestGTK3.MainClass</StartupObject>
+    <AssemblyName>GLWidgetTestGTK3</AssemblyName>
+    <ReleaseVersion>1.1</ReleaseVersion>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="GtkSharp" Version="3.22.25.56"/>
+    <PackageReference Include="OpenTK" Version="4.0.0-pre9.4"/>
+    <PackageReference Include="OpenGL.Net" Version="1.0.304"/>
+  </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="interfaces\MainWindow.glade"/>
+  </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="Shaders\FragmentShader.glsl"/>
+    <EmbeddedResource Include="Shaders\VertexShader.glsl"/>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config"/>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\GLWidget\GLWidget.csproj"/>
+  </ItemGroup>
+  <ProjectExtensions>
+    <MonoDevelop>
+      <Properties>
+        <GtkDesignInfo generateGettext="False"/>
+      </Properties>
+    </MonoDevelop>
+  </ProjectExtensions>
+</Project>

GLWidgetTestGTK3/GTKBindingContext.cs

@@ -0,0 +1,140 @@
+using System;
+using OpenTK;
+using OpenGL;
+using System.Runtime.InteropServices;
+using Khronos;
+using System.Collections.Generic;
+
+namespace GLWidgetTestGTK3
+{
+    public class GTKBindingContext : IBindingsContext
+    {
+        private static bool _loaded;
+
+        private const string GlxLibrary = "libGL.so.1";
+        private const string WglLibrary = "opengl32.dll";
+        private const string OSXLibrary = "libdl.dylib";
+
+
+        /// <summary>
+        /// Currently loaded libraries.
+        /// </summary>
+        private static readonly Dictionary<string, IntPtr> _LibraryHandles = new Dictionary<string, IntPtr>();
+        
+        public IntPtr GetProcAddress(string procName)
+        {
+            switch (Platform.CurrentPlatformId)
+            {
+                case Platform.Id.WindowsNT:
+                    return GetProcAddressWgl(procName);
+                case Platform.Id.Linux:
+                    return GetProcAddressGlx(procName);
+                case Platform.Id.MacOS:
+                    return !Glx.IsRequired ? GetProcAddressOSX(procName) : GetProcAddressGlx(procName);
+                default:
+                    throw new NotSupportedException();
+            }
+        }
+
+        private static IntPtr GetProcAddressWgl(string function)
+        {
+            return UnsafeNativeMethods.wglGetProcAddress(function);
+        }
+
+        private static void LoadLibraries()
+        {
+            if (_loaded)
+            {
+                return;
+            }
+
+            string function = "glXGetProcAddress";
+
+            IntPtr handle = GetLibraryHandle(GlxLibrary, true);
+
+            if (handle == IntPtr.Zero)
+                throw new ArgumentNullException(nameof(handle));
+
+            IntPtr functionPtr = UnsafeNativeMethods.dlsym(handle, function);
+
+            if (functionPtr != IntPtr.Zero)
+                Delegates.pglXGetProcAddress = (Delegates.glXGetProcAddress)Marshal.GetDelegateForFunctionPointer(functionPtr, typeof(Delegates.glXGetProcAddress));
+            
+            _loaded = true;
+        }
+
+        internal static IntPtr GetLibraryHandle(string libraryPath, bool throws)
+        {
+            IntPtr libraryHandle;
+
+            if (_LibraryHandles.TryGetValue(libraryPath, out libraryHandle) == false)
+            {
+                if ((libraryHandle = UnsafeNativeMethods.dlopen(libraryPath, UnsafeNativeMethods.RTLD_LAZY)) == IntPtr.Zero)
+                {
+                    if (throws)
+                        throw new InvalidOperationException($"unable to load library at {libraryPath}", new InvalidOperationException(UnsafeNativeMethods.dlerror()));
+                }
+
+                _LibraryHandles.Add(libraryPath, libraryHandle);
+            }
+
+            return libraryHandle;
+        }
+
+        private static IntPtr GetProcAddressGlx(string function)
+        {
+            LoadLibraries();
+
+            return Delegates.pglXGetProcAddress != null ? Delegates.pglXGetProcAddress(function) : IntPtr.Zero;
+        }
+
+        private static IntPtr GetProcAddressOSX(string function)
+        {
+            string fname = "_" + function;
+            if (!UnsafeNativeMethods.NSIsSymbolNameDefined(fname))
+                return IntPtr.Zero;
+
+            IntPtr symbol = UnsafeNativeMethods.NSLookupAndBindSymbol(fname);
+
+            if (symbol != IntPtr.Zero)
+                symbol = UnsafeNativeMethods.NSAddressOfSymbol(symbol);
+
+            return symbol;
+        }
+
+        private static class UnsafeNativeMethods
+        {
+            [DllImport(WglLibrary, EntryPoint = "wglGetProcAddress", ExactSpelling = true, SetLastError = true)]
+            public static extern IntPtr wglGetProcAddress(string lpszProc);
+
+            [DllImport(OSXLibrary, EntryPoint = "NSIsSymbolNameDefined")]
+            public static extern bool NSIsSymbolNameDefined(string s);
+
+            [DllImport(OSXLibrary, EntryPoint = "NSLookupAndBindSymbol")]
+            public static extern IntPtr NSLookupAndBindSymbol(string s);
+
+            [DllImport(OSXLibrary, EntryPoint = "NSAddressOfSymbol")]
+            public static extern IntPtr NSAddressOfSymbol(IntPtr symbol);
+
+            public const int RTLD_LAZY = 1;
+
+            public const int RTLD_NOW = 2;
+
+			[DllImport("dl")]
+			public static extern IntPtr dlopen(string filename, int flags);
+
+			[DllImport("dl")]
+			public static extern IntPtr dlsym(IntPtr handle, string symbol);
+
+            [DllImport("dl")]
+            public static extern string dlerror();
+        }
+
+        private static class Delegates
+        {
+            public delegate IntPtr glXGetProcAddress(string procName);
+
+            public static glXGetProcAddress pglXGetProcAddress;
+        }
+    }
+}

GLWidgetTestGTK3/Geometry/Shapes.cs

@@ -0,0 +1,76 @@
+//
+//  Mesh.cs
+//
+//  Author:
+//       Jarl Gullberg <jarl.gullberg@gmail.com>
+//
+//  Copyright (c) 2016 Jarl Gullberg
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+using System;
+
+namespace GLWidgetTestGTK3.Debug
+{
+	public static class Shapes
+	{
+		public static readonly float[] UnindexedTriangle =
+		{
+			-1.0f, -1.0f, 0.0f,
+			1.0f, -1.0f, 0.0f,
+			0.0f, 1.0f, 0.0f
+		};
+
+		public static readonly float[] UnindexedCube =
+		{
+			-1.0f,-1.0f,-1.0f,
+			-1.0f,-1.0f, 1.0f,
+			-1.0f, 1.0f, 1.0f,
+			1.0f, 1.0f,-1.0f,
+			-1.0f,-1.0f,-1.0f,
+			-1.0f, 1.0f,-1.0f,
+			1.0f,-1.0f, 1.0f,
+			-1.0f,-1.0f,-1.0f,
+			1.0f,-1.0f,-1.0f,
+			1.0f, 1.0f,-1.0f,
+			1.0f,-1.0f,-1.0f,
+			-1.0f,-1.0f,-1.0f,
+			-1.0f,-1.0f,-1.0f,
+			-1.0f, 1.0f, 1.0f,
+			-1.0f, 1.0f,-1.0f,
+			1.0f,-1.0f, 1.0f,
+			-1.0f,-1.0f, 1.0f,
+			-1.0f,-1.0f,-1.0f,
+			-1.0f, 1.0f, 1.0f,
+			-1.0f,-1.0f, 1.0f,
+			1.0f,-1.0f, 1.0f,
+			1.0f, 1.0f, 1.0f,
+			1.0f,-1.0f,-1.0f,
+			1.0f, 1.0f,-1.0f,
+			1.0f,-1.0f,-1.0f,
+			1.0f, 1.0f, 1.0f,
+			1.0f,-1.0f, 1.0f,
+			1.0f, 1.0f, 1.0f,
+			1.0f, 1.0f,-1.0f,
+			-1.0f, 1.0f,-1.0f,
+			1.0f, 1.0f, 1.0f,
+			-1.0f, 1.0f,-1.0f,
+			-1.0f, 1.0f, 1.0f,
+			1.0f, 1.0f, 1.0f,
+			-1.0f, 1.0f, 1.0f,
+			1.0f,-1.0f, 1.0f
+		};
+	}
+}

GLWidgetTestGTK3/MainWindow.cs

@@ -0,0 +1,578 @@
+//
+//  MainWindow.cs
+//
+//  Author:
+//       Jarl Gullberg <jarl.gullberg@gmail.com>
+//
+//  Copyright (c) 2016 Jarl Gullberg
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Reflection;
+using Gdk;
+using GLWidgetTestGTK3.Data;
+using GLWidgetTestGTK3.Debug;
+using GLWidgetTestGTK3.World;
+using Gtk;
+using UI = Gtk.Builder.ObjectAttribute;
+using OpenTK;
+using OpenTK.Mathematics;
+using OpenTK.Graphics.OpenGL;
+using KeyPressEventArgs = Gtk.KeyPressEventArgs;
+
+namespace GLWidgetTestGTK3
+{
+	public partial class MainWindow : Gtk.Window
+	{
+		[UI] readonly Box MainBox;
+		[UI] readonly MenuBar MainMenuBar;
+
+		[UI] readonly Alignment GLWidgetAlignment;
+		[UI] readonly GLWidget MainGLWidget;
+
+		private bool GLInit;
+
+		private Scene Scene;
+
+		private uint VertexArrayID;
+		private uint ColourBufferID;
+
+		private int ShaderProgramID;
+
+        /* Default camera positions */
+        private Vector3 cameraPosition;
+		private Vector3 cameraLookDirection;
+		private Vector3 cameraRightVector;
+
+		private Vector3 cameraUpVector;
+		private float horizontalViewAngle;
+		private float verticalViewAngle;
+		private const float defaultFOV = 45.0f;
+
+		private const float defaultMovementSpeed = 10.0f;
+		private const float defaultCameraSpeed = 0.5f;
+
+		// Other variables
+		private bool wantsToMove = false;
+		private float deltaTime;
+
+		private int mouseXLastFrame;
+		private int mouseYLastFrame;
+
+		private float rightAxis;
+		private float forwardAxis;
+
+		private static readonly float[] cubeColourBufferData =
+		{
+			0.583f,  0.771f,  0.014f,
+			0.609f,  0.115f,  0.436f,
+			0.327f,  0.483f,  0.844f,
+			0.822f,  0.569f,  0.201f,
+			0.435f,  0.602f,  0.223f,
+			0.310f,  0.747f,  0.185f,
+			0.597f,  0.770f,  0.761f,
+			0.559f,  0.436f,  0.730f,
+			0.359f,  0.583f,  0.152f,
+			0.483f,  0.596f,  0.789f,
+			0.559f,  0.861f,  0.639f,
+			0.195f,  0.548f,  0.859f,
+			0.014f,  0.184f,  0.576f,
+			0.771f,  0.328f,  0.970f,
+			0.406f,  0.615f,  0.116f,
+			0.676f,  0.977f,  0.133f,
+			0.971f,  0.572f,  0.833f,
+			0.140f,  0.616f,  0.489f,
+			0.997f,  0.513f,  0.064f,
+			0.945f,  0.719f,  0.592f,
+			0.543f,  0.021f,  0.978f,
+			0.279f,  0.317f,  0.505f,
+			0.167f,  0.620f,  0.077f,
+			0.347f,  0.857f,  0.137f,
+			0.055f,  0.953f,  0.042f,
+			0.714f,  0.505f,  0.345f,
+			0.783f,  0.290f,  0.734f,
+			0.722f,  0.645f,  0.174f,
+			0.302f,  0.455f,  0.848f,
+			0.225f,  0.587f,  0.040f,
+			0.517f,  0.713f,  0.338f,
+			0.053f,  0.959f,  0.120f,
+			0.393f,  0.621f,  0.362f,
+			0.673f,  0.211f,  0.457f,
+			0.820f,  0.883f,  0.371f,
+			0.982f,  0.099f,  0.879f
+		};
+
+		public static MainWindow Create()
+		{
+			Builder builder = new Builder(null, "GLWidgetTestGTK3.interfaces.MainWindow.glade", null);
+			return new MainWindow(builder, builder.GetObject("MainWindow").Handle);
+		}
+
+		protected MainWindow(Builder builder, IntPtr handle)
+			: base(handle)
+		{
+			builder.Autoconnect(this);
+			DeleteEvent += OnDeleteEvent;
+
+			this.GLInit = false;
+			ResetCamera();
+
+			this.MainGLWidget = new GLWidget()
+			{
+				GLVersionMajor = 3,
+				GLVersionMinor = 3,
+			};
+
+			this.MainGLWidget.Events |=
+				EventMask.ButtonPressMask |
+				EventMask.ButtonReleaseMask |
+				EventMask.KeyPressMask |
+				EventMask.KeyReleaseMask;
+
+			this.MainGLWidget.Initialized += OnViewportInitialized;
+			this.MainGLWidget.ButtonPressEvent += OnViewportButtonPressed;
+			this.MainGLWidget.ButtonReleaseEvent += OnViewportButtonReleased;
+			this.MainGLWidget.KeyPressEvent += OnViewportKeyPressed;
+			this.MainGLWidget.KeyReleaseEvent += OnViewportKeyReleased;
+
+			// Add the GL widget to the UI
+			this.GLWidgetAlignment.Add(this.MainGLWidget);
+			this.GLWidgetAlignment.ShowAll();
+
+		}
+
+		private List<Vertex> FloatArrayToVertexList(float[] vertexPositions)
+		{
+			if ((vertexPositions.Length % 3) != 0)
+			{
+				throw new ArgumentException("The input array must be of a 3-multiple length. Incomplete entries are not allowed.", nameof(vertexPositions));
+			}
+
+			List<Vertex> convertedVertices = new List<Vertex>();
+
+			for (int i = 0; i < vertexPositions.Length; i += 3)
+			{
+				Vector3 Position = new Vector3(vertexPositions[i], vertexPositions[i + 1], vertexPositions[i + 2]);
+				Vertex vertex = new Vertex(Position);
+
+				convertedVertices.Add(vertex);
+			}
+
+			return convertedVertices;
+		}
+
+		private void OnViewportKeyReleased(object o, KeyReleaseEventArgs args)
+		{
+			if (args.Event.Type == EventType.KeyRelease)
+			{
+				if( args.Event.Key == Gdk.Key.w || args.Event.Key == Gdk.Key.W)
+				{
+					forwardAxis = 0.0f;
+				}
+				else if( args.Event.Key == Gdk.Key.s || args.Event.Key == Gdk.Key.S)
+				{
+					forwardAxis = 0.0f;
+				}
+
+				if( args.Event.Key == Gdk.Key.d || args.Event.Key == Gdk.Key.D)
+				{
+					rightAxis = 0.0f;
+				}
+				else if( args.Event.Key == Gdk.Key.a || args.Event.Key == Gdk.Key.A)
+				{
+					rightAxis = 0.0f;
+				}
+			}
+		}
+
+		private void OnViewportKeyPressed(object o, KeyPressEventArgs args)
+		{
+			if (args.Event.Type == EventType.KeyPress)
+			{
+				if( args.Event.Key == Gdk.Key.w || args.Event.Key == Gdk.Key.W)
+				{
+					forwardAxis = 1.0f;
+				}
+				else if( args.Event.Key == Gdk.Key.s || args.Event.Key == Gdk.Key.S)
+				{
+					forwardAxis = -1.0f;
+				}
+
+				if( args.Event.Key == Gdk.Key.d || args.Event.Key == Gdk.Key.D)
+				{
+					rightAxis = 1.0f;
+				}
+				else if( args.Event.Key == Gdk.Key.a || args.Event.Key == Gdk.Key.A)
+				{
+					rightAxis = -1.0f;
+				}
+
+				if( args.Event.Key == Gdk.Key.r || args.Event.Key == Gdk.Key.R)
+				{
+					if (wantsToMove)
+					{
+						ResetCamera();
+					}
+				}
+
+				if (args.Event.Key == Gdk.Key.Escape)
+				{
+					Application.Quit();
+				}
+			}
+		}
+
+		private void ResetCamera()
+		{
+			this.cameraPosition = new Vector3(0.0f, 0.0f, 5.0f);
+			this.horizontalViewAngle = MathHelper.DegreesToRadians(180.0f);
+           	this.verticalViewAngle = MathHelper.DegreesToRadians(0.0f);
+
+			this.cameraLookDirection = new Vector3(
+				(float)(Math.Cos(this.verticalViewAngle) * Math.Sin(this.horizontalViewAngle)),
+				(float)Math.Sin(this.verticalViewAngle),
+				(float)(Math.Cos(this.verticalViewAngle) * Math.Cos(this.horizontalViewAngle)));
+
+			this.cameraRightVector = new Vector3(
+				(float)Math.Sin(horizontalViewAngle - MathHelper.PiOver2),
+				0,
+				(float)Math.Cos(horizontalViewAngle - MathHelper.PiOver2));
+
+			this.cameraUpVector = Vector3.Cross(cameraRightVector, cameraLookDirection);
+		}
+
+		[GLib.ConnectBefore]
+		private void OnViewportButtonReleased(object o, ButtonReleaseEventArgs args)
+		{
+			// Right click is released
+			if (args.Event.Type == EventType.ButtonRelease && args.Event.Button == 3)
+			{
+				// Return the mouse pointer
+				this.Window.Cursor = new Cursor(CursorType.Arrow);
+
+				this.GrabFocus();
+				this.wantsToMove = false;
+			}
+		}
+
+		[GLib.ConnectBefore]
+		private void OnViewportButtonPressed(object o, ButtonPressEventArgs args)
+		{
+			// Right click is pressed
+			if (args.Event.Type == EventType.ButtonPress && args.Event.Button == 3)
+			{
+				// Hide the mouse pointer
+				this.Window.Cursor = new Cursor(CursorType.BlankCursor);
+
+				this.MainGLWidget.GrabFocus();
+				this.wantsToMove = true;
+				this.MainGLWidget.GetPointer(out this.mouseXLastFrame, out this.mouseYLastFrame);
+			}
+		}
+
+		protected virtual void OnViewportInitialized(object sender, EventArgs e)
+		{
+			var version = GL.GetString(StringName.Version);
+
+			this.Scene = new Scene();
+
+			// Create the cube actor
+			Actor cubeActor = new Actor(new Mesh(FloatArrayToVertexList(Shapes.UnindexedCube)));
+			Actor cubeActor1 = new Actor(new Mesh(FloatArrayToVertexList(Shapes.UnindexedCube)));
+			Actor cubeActor2 = new Actor(new Mesh(FloatArrayToVertexList(Shapes.UnindexedCube)));
+			Actor cubeActor3 = new Actor(new Mesh(FloatArrayToVertexList(Shapes.UnindexedCube)));
+
+			// Translate the cube actor
+			cubeActor.Transform.Translation = new Vector3(4.0f, 0.0f, 0.0f);
+			cubeActor1.Transform.Translation = new Vector3(0.0f, 4.0f, 0.0f);
+			cubeActor2.Transform.Translation = new Vector3(0.0f, -4.0f, 0.0f);
+			cubeActor3.Transform.Translation = new Vector3(-4.0f, 0.0f, 0.0f);
+
+			Actor triangleActor = new Actor(new Mesh(FloatArrayToVertexList(Shapes.UnindexedTriangle)));
+
+			this.Scene.Actors.Add(cubeActor);
+			this.Scene.Actors.Add(cubeActor1);
+			this.Scene.Actors.Add(cubeActor2);
+			this.Scene.Actors.Add(cubeActor3);
+			this.Scene.Actors.Add(triangleActor);
+
+			// Generate the colour buffer
+			GL.GenBuffers(1, out ColourBufferID);
+
+			// Upload the colour data
+			GL.BindBuffer(BufferTarget.ArrayBuffer, ColourBufferID);
+			GL.BufferData(BufferTarget.ArrayBuffer,  (IntPtr)(cubeColourBufferData.Length * sizeof(float)), cubeColourBufferData, BufferUsageHint.StaticDraw);
+
+			// Make sure we use the depth buffer when drawing
+			GL.Enable(EnableCap.DepthTest);
+			//GL.DepthFunc(DepthFunction.Less);
+
+			// Enable backface culling for performance reasons
+			//GL.Enable(EnableCap.CullFace);
+
+			// Render wireframe
+			//GL.PolygonMode(MaterialFace.FrontAndBack, PolygonMode.Line);
+
+			// Initialize the viewport
+			int widgetWidth = this.GLWidgetAlignment.AllocatedWidth;
+			int widgetHeight = this.GLWidgetAlignment.AllocatedHeight;
+
+			GL.Viewport(0, 0, widgetWidth, widgetHeight);
+			GL.ClearColor(0.522f, 0.573f, 0.678f, 1.0f);
+			GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
+
+			// Load the shaders
+            ShaderProgramID = LoadShaders();
+
+			// Add idle event handler to process rendering whenever and as long as time is available.
+			GLInit = true;
+			GLib.Idle.Add(OnIdleProcessMain);
+		}
+
+		protected void RenderFrame()
+        {
+            MainGLWidget.MakeCurrent();
+
+            // Make sure the viewport is accurate for the current widget size on screen
+            int widgetWidth = this.GLWidgetAlignment.AllocatedWidth;
+			int widgetHeight = this.GLWidgetAlignment.AllocatedHeight;
+            var error = GL.GetError();
+            GL.Viewport(0, 0, widgetWidth, widgetHeight);
+            GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
+
+			// Activate the shaders
+            GL.UseProgram(ShaderProgramID);
+
+			// See if there's any movement to compute
+			if (wantsToMove)
+			{
+				int mouseX;
+				int mouseY;
+				this.MainGLWidget.GetPointer(out mouseX, out mouseY);
+
+				this.horizontalViewAngle += defaultCameraSpeed * this.deltaTime * (float)(mouseXLastFrame - mouseX);
+				this.verticalViewAngle += defaultCameraSpeed * this.deltaTime * (float)(mouseYLastFrame - mouseY);
+
+				if (verticalViewAngle > MathHelper.DegreesToRadians(90.0f))
+				{
+					verticalViewAngle = MathHelper.DegreesToRadians(90.0f);
+				}
+				else if (verticalViewAngle < MathHelper.DegreesToRadians(-90.0f))
+				{
+					verticalViewAngle = MathHelper.DegreesToRadians(-90.0f);
+				}
+
+				mouseXLastFrame = mouseX;
+				mouseYLastFrame = mouseY;
+
+				// Compute the look direction
+				this.cameraLookDirection = new Vector3(
+					(float)(Math.Cos(this.verticalViewAngle) * Math.Sin(this.horizontalViewAngle)),
+					(float)Math.Sin(this.verticalViewAngle),
+					(float)(Math.Cos(this.verticalViewAngle) * Math.Cos(this.horizontalViewAngle)));
+
+				this.cameraRightVector = new Vector3(
+					(float)Math.Sin(this.horizontalViewAngle - MathHelper.PiOver2),
+					0,
+					(float)Math.Cos(this.horizontalViewAngle - MathHelper.PiOver2));
+
+				this.cameraUpVector = Vector3.Cross(this.cameraRightVector, this.cameraLookDirection);
+
+				// Perform any movement
+				if (forwardAxis > 0)
+				{
+					this.cameraPosition += this.cameraLookDirection * deltaTime * defaultMovementSpeed;
+				}
+
+				if (forwardAxis < 0)
+				{
+					this.cameraPosition -= this.cameraLookDirection * deltaTime * defaultMovementSpeed;
+				}
+
+				if (rightAxis > 0)
+				{
+					this.cameraPosition += this.cameraRightVector * deltaTime * defaultMovementSpeed;
+				}
+
+				if (rightAxis < 0)
+				{
+					this.cameraPosition -= this.cameraRightVector * deltaTime * defaultMovementSpeed;
+				}
+			}
+
+			// Calculate the relative viewpoint
+			float aspectRatio = (float)widgetWidth / (float)widgetHeight;
+			Matrix4 Projection = Matrix4.CreatePerspectiveFieldOfView(MathHelper.DegreesToRadians(defaultFOV), aspectRatio, 0.1f, 1000.0f);
+			Matrix4 View = Matrix4.LookAt(
+				cameraPosition,
+				cameraPosition + cameraLookDirection,
+				cameraUpVector
+			);
+
+			// Enable the colour array
+			GL.EnableVertexAttribArray(1);
+			GL.BindBuffer(BufferTarget.ArrayBuffer, ColourBufferID);
+			GL.VertexAttribPointer(
+				1,
+				3,
+				VertexAttribPointerType.Float,
+				false,
+				0,
+				0);
+
+			// Tick the actors before any rendering is done
+			this.Scene.Tick(deltaTime);
+
+			foreach (Actor actor in this.Scene.Actors)
+			{
+				actor.Render(ShaderProgramID, View, Projection);
+			}
+
+			// Release the arrays
+			GL.DisableVertexAttribArray(1);
+
+            //swap
+            MainGLWidget.Swapbuffers();
+        }
+
+		protected bool OnIdleProcessMain()
+		{
+			if (!GLInit)
+				return false;
+			else
+			{
+                // Start deltaTime calculation
+                Stopwatch deltaTimeWatcher = new Stopwatch();
+				deltaTimeWatcher.Start();
+
+                System.Threading.Tasks.Task.Run(RenderFrame).Wait();
+
+                //RenderFrame();
+
+                MainGLWidget.ClearCurrent();
+
+                // End delta time calculation
+                deltaTimeWatcher.Stop();
+				this.deltaTime = (float)(deltaTimeWatcher.ElapsedMilliseconds * 0.001f);
+				return true;
+			}
+		}
+
+		private int LoadShaders()
+		{
+			int VertexShaderID = GL.CreateShader(ShaderType.VertexShader);
+			int FragmentShaderID = GL.CreateShader(ShaderType.FragmentShader);
+
+			string vertexShaderSourceCode;
+			using (Stream shaderStream =
+					Assembly.GetExecutingAssembly().GetManifestResourceStream("GLWidgetTestGTK3.Shaders.VertexShader.glsl"))
+			{
+				using (StreamReader sr = new StreamReader(shaderStream))
+				{
+					vertexShaderSourceCode = sr.ReadToEnd();
+				}
+			}
+
+			string fragmentShaderSourceCode;
+			using (Stream shaderStream =
+					Assembly.GetExecutingAssembly().GetManifestResourceStream("GLWidgetTestGTK3.Shaders.FragmentShader.glsl"))
+			{
+				using (StreamReader sr = new StreamReader(shaderStream))
+				{
+					fragmentShaderSourceCode = sr.ReadToEnd();
+				}
+			}
+
+
+			int result = 0;
+			int compilationLogLength;
+
+			Console.WriteLine("Compiling vertex shader...");
+			GL.ShaderSource(VertexShaderID, vertexShaderSourceCode);
+			GL.CompileShader(VertexShaderID);
+
+			GL.GetShader(VertexShaderID, ShaderParameter.CompileStatus, out result);
+			GL.GetShader(VertexShaderID, ShaderParameter.InfoLogLength, out compilationLogLength);
+
+			if (compilationLogLength > 0)
+			{
+				string compilationLog;
+				GL.GetShaderInfoLog(VertexShaderID, out compilationLog);
+
+				Console.WriteLine(compilationLog);
+			}
+
+			Console.WriteLine("Compiling fragment shader...");
+			GL.ShaderSource(FragmentShaderID, fragmentShaderSourceCode);
+			GL.CompileShader(FragmentShaderID);
+
+			GL.GetShader(FragmentShaderID, ShaderParameter.CompileStatus, out result);
+			GL.GetShader(FragmentShaderID, ShaderParameter.InfoLogLength, out compilationLogLength);
+
+			if (compilationLogLength > 0)
+			{
+				string compilationLog;
+				GL.GetShaderInfoLog(FragmentShaderID, out compilationLog);
+
+				Console.WriteLine(compilationLog);
+			}
+
+
+			Console.WriteLine("Linking shader program...");
+			int shaderProgramID = GL.CreateProgram();
+
+			GL.AttachShader(shaderProgramID, VertexShaderID);
+			GL.AttachShader(shaderProgramID, FragmentShaderID);
+			GL.LinkProgram(shaderProgramID);
+
+			GL.GetProgram(shaderProgramID, ProgramParameter.LinkStatus, out result);
+			GL.GetProgram(shaderProgramID, ProgramParameter.InfoLogLength, out compilationLogLength);
+
+			if (compilationLogLength > 0)
+			{
+				string compilationLog;
+				GL.GetProgramInfoLog(shaderProgramID, out compilationLog);
+
+				Console.WriteLine(compilationLog);
+			}
+
+			// Clean up the shader source code and unlinked object files from graphics memory
+			GL.DetachShader(shaderProgramID, VertexShaderID);
+			GL.DetachShader(shaderProgramID, FragmentShaderID);
+
+			GL.DeleteShader(VertexShaderID);
+			GL.DeleteShader(FragmentShaderID);
+
+			return shaderProgramID;
+		}
+
+		/// <summary>
+		/// Handles application shutdown procedures - terminating render threads, cleaning
+		/// up the UI, etc.
+		/// </summary>
+		/// <param name="sender">Sender.</param>
+		/// <param name="a">The deletion arguments.</param>
+		protected void OnDeleteEvent(object sender, DeleteEventArgs a)
+		{
+			Application.Quit();
+			a.RetVal = true;
+		}
+	}
+}
+

GLWidgetTestGTK3/Program.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Reflection;
+using Gtk;
+using OpenTK;
+
+namespace GLWidgetTestGTK3
+{
+	class MainClass
+	{
+		public static void Main(string[] args)
+		{
+            InitializeGlBindings();
+
+            // GTK
+            Application.Init();
+			MainWindow win = MainWindow.Create();
+			win.Show();
+			Application.Run();
+		}
+
+        private static void InitializeGlBindings()
+        {
+            // We don't put a hard dependency on OpenTK.Graphics here.
+            // So we need to use reflection to initialize the GL bindings, so users don't have to.
+
+            // Try to load OpenTK.Graphics assembly.
+            Assembly assembly;
+            try
+            {
+                assembly = Assembly.Load("OpenTK.Graphics");
+            }
+            catch
+            {
+                // Failed to load graphics, oh well.
+                // Up to the user I guess?
+                // TODO: Should we expose this load failure to the user better?
+                return;
+            }
+
+            var provider = new GTKBindingContext();
+
+            void LoadBindings(string typeNamespace)
+            {
+                var type = assembly.GetType($"OpenTK.Graphics.{typeNamespace}.GL");
+                if (type == null)
+                {
+                    return;
+                }
+
+                var load = type.GetMethod("LoadBindings");
+                load.Invoke(null, new object[] { provider });
+            }
+
+            LoadBindings("ES11");
+            LoadBindings("ES20");
+            LoadBindings("ES30");
+            LoadBindings("OpenGL");
+            LoadBindings("OpenGL4");
+        }
+	}
+}

GLWidgetTestGTK3/Shaders/FragmentShader.glsl

@@ -0,0 +1,12 @@
+#version 330 core
+
+in vec3 fragmentColour;
+
+out vec3 color;
+
+void main()
+{
+	//color = vec3(0.18, 0.204, 0.212);
+	color = fragmentColour;
+	//color = vec3(gl_FragCoord.z);
+}

GLWidgetTestGTK3/Shaders/VertexShader.glsl

@@ -0,0 +1,14 @@
+#version 330 core
+layout(location = 0) in vec3 vertexPosition_modelSpace;
+layout(location = 1) in vec3 vertexColour;
+
+uniform mat4 ModelViewProjection;
+
+out vec3 fragmentColour;
+
+void main()
+{
+	gl_Position = ModelViewProjection * vec4(vertexPosition_modelSpace, 1.0);
+
+	fragmentColour = vertexColour;
+}

GLWidgetTestGTK3/World/Actor.cs

@@ -0,0 +1,104 @@
+//
+//  Actor.cs
+//
+//  Author:
+//       Jarl Gullberg <jarl.gullberg@gmail.com>
+//
+//  Copyright (c) 2016 Jarl Gullberg
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+using System;
+using GLib;
+using GLWidgetTestGTK3.Data;
+using OpenTK.Mathematics;
+using OpenTK.Graphics.OpenGL;
+
+namespace GLWidgetTestGTK3.World
+{
+	public class Actor
+	{
+		public Transform Transform;
+		private readonly Mesh Mesh;
+
+		/// <summary>
+		/// Creates a new instance of the <see cref="Actor"/> class.
+		/// </summary>
+		/// <param name="Mesh">The mesh bound to the actor.</param>
+		public Actor(Mesh Mesh)
+		{
+			this.Mesh = Mesh;
+			this.Transform = new Transform(new Vector3(0.0f, 0.0f, 0.0f));
+		}
+
+		/// <summary>
+		/// Performs any arbitrary actions needed every frame, such as animations, texture manipulations or state
+		/// updates.
+		/// </summary>
+		/// <param name="deltaTime">The time (in thousands of a second) taken to render the previous frame.</param>
+		public void Tick(float deltaTime)
+		{
+
+		}
+
+		/// <summary>
+		/// Renders this actor within the current OpenGL context.
+		/// </summary>
+		/// <param name="ShaderProgramID">The ID of the currently active shader.</param>
+		/// <param name="ViewMatrix">The camera view matrix, calulcated from the camera position.</param>
+		/// <param name="ProjectionMatrix">The perspective projection currently in use.</param>
+		public void Render(int ShaderProgramID, Matrix4 ViewMatrix, Matrix4 ProjectionMatrix)
+        {
+			// Enable the mesh vertex array
+	        GL.BindBuffer(BufferTarget.ArrayBuffer, Mesh.VertexBufferID);
+
+			GL.EnableVertexAttribArray(0);
+	        GL.VertexAttribPointer(
+            				0,
+            				3,
+            				VertexAttribPointerType.Float,
+            				false,
+            				0,
+            				0);
+
+	        // Enable the normal attributes
+	        GL.EnableVertexAttribArray(3);
+			GL.VertexAttribPointer(
+							2,
+							3,
+							VertexAttribPointerType.Float,
+							false,
+							0,
+							0);
+
+	        Matrix4 modelTranslation = Matrix4.CreateTranslation(Transform.Translation);
+	        Matrix4 modelScale = Matrix4.CreateScale(Transform.Scale);
+	        Matrix4 modelRotation = Matrix4.CreateFromQuaternion(Transform.Rotation);
+
+	        Matrix4 modelViewProjection = modelScale *  modelRotation * modelTranslation * ViewMatrix * ProjectionMatrix;
+
+	        // Send the model matrix to the shader
+	        int projectionShaderVariableHandle = GL.GetUniformLocation(ShaderProgramID, "ModelViewProjection");
+	        GL.UniformMatrix4(projectionShaderVariableHandle, false, ref modelViewProjection);
+
+	        // Draw the model
+	        GL.DrawArrays(BeginMode.Triangles, 0, Mesh.GetVertexCount());
+
+	        // Release the attribute arrays
+	        GL.DisableVertexAttribArray(0);
+	        GL.DisableVertexAttribArray(3);
+        }
+	}
+}

GLWidgetTestGTK3/World/Mesh.cs

@@ -0,0 +1,135 @@
+//
+//  Mesh.cs
+//
+//  Author:
+//       Jarl Gullberg <jarl.gullberg@gmail.com>
+//
+//  Copyright (c) 2016 Jarl Gullberg
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+using System;
+using System.Collections.Generic;
+using GLWidgetTestGTK3.Data;
+using OpenTK.Graphics.OpenGL;
+
+namespace GLWidgetTestGTK3.World
+{
+	public class Mesh
+	{
+		private List<Vertex> Vertices;
+
+		private int vertexBufferID = -1;
+		public int VertexBufferID
+		{
+			get { return vertexBufferID; }
+		}
+
+		private int normalBufferID = -1;
+		public int NormalBufferID
+		{
+			get { return normalBufferID; }
+		}
+
+		private bool cullFaces;
+
+		public bool CullFaces
+		{
+			get;
+			set;
+		}
+
+		public Mesh(List<Vertex> Vertices)
+		{
+			this.Vertices = Vertices;
+
+			this.vertexBufferID = UploadVertexPositions();
+			this.normalBufferID = UploadVertexNormals();
+		}
+
+		public int GetVertexCount()
+		{
+			return Vertices.Count;
+		}
+
+		private int UploadVertexPositions()
+		{
+			if (vertexBufferID > 0)
+			{
+				return vertexBufferID;
+			}
+
+			// Generate a buffer
+			GL.GenBuffers(1, out vertexBufferID);
+
+			// Get the vertex positions
+			float[] vertexPositions = GetVertexPositions();
+
+			// Upload the vertices to the GPU
+			GL.BindBuffer(BufferTarget.ArrayBuffer, vertexBufferID);
+			GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(vertexPositions.Length * sizeof(float)), vertexPositions, BufferUsageHint.StaticDraw);
+
+			return vertexBufferID;
+		}
+
+		private int UploadVertexNormals()
+		{
+			if (normalBufferID > 0)
+			{
+				return normalBufferID;
+			}
+
+			// Generate a buffer
+			GL.GenBuffers(1, out normalBufferID);
+
+			// Get the vertex positions
+			float[] vertexNormals = GetVertexNormals();
+
+			// Upload the vertices to the GPU
+			GL.BindBuffer(BufferTarget.ArrayBuffer, normalBufferID);
+			GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(vertexNormals.Length * sizeof(float)), vertexNormals, BufferUsageHint.StaticDraw);
+
+			return vertexBufferID;
+		}
+
+		private float[] GetVertexPositions()
+		{
+			List<float> vertexPositions = new List<float>();
+
+			foreach (Vertex StoredVertex in Vertices)
+			{
+				vertexPositions.Add(StoredVertex.Position.X);
+				vertexPositions.Add(StoredVertex.Position.Y);
+				vertexPositions.Add(StoredVertex.Position.Z);
+			}
+
+			return vertexPositions.ToArray();
+		}
+
+		private float[] GetVertexNormals()
+		{
+			List<float> vertexNormals = new List<float>();
+
+			foreach (Vertex StoredVertex in Vertices)
+			{
+				vertexNormals.Add(StoredVertex.Normal.X);
+				vertexNormals.Add(StoredVertex.Normal.Y);
+				vertexNormals.Add(StoredVertex.Normal.Z);
+			}
+
+			return vertexNormals.ToArray();
+		}
+	}
+}

GLWidgetTestGTK3/World/Scene.cs

@@ -0,0 +1,60 @@
+//
+//  Scene.cs
+//
+//  Author:
+//       Jarl Gullberg <jarl.gullberg@gmail.com>
+//
+//  Copyright (c) 2016 Jarl Gullberg
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+using System;
+using System.Collections.Generic;
+using OpenTK.Graphics.OpenGL;
+
+namespace GLWidgetTestGTK3.World
+{
+	public class Scene
+	{
+		public readonly List<Actor> Actors = new List<Actor>();
+
+		private readonly int vertexArrayID = -1;
+		public int VertexArrayID
+		{
+			get { return vertexArrayID; }
+		}
+
+		public Scene()
+		{
+			// Generate the vertex array
+			GL.GenVertexArrays(1, out vertexArrayID);
+			GL.BindVertexArray(VertexArrayID);
+		}
+
+		/// <summary>
+		/// Runs the <see cref="Actor.Tick"/> function on all <see cref="Actor"/> instances
+		/// in the scene. Actors can define arbitrary behaviour in their ticks, but in most
+		/// cases it's used for animation.
+		/// </summary>
+		/// <param name="deltaTime">The time (in thousands of a second) taken to render the previous frame.</param>
+		public void Tick(float deltaTime)
+		{
+			for (int i = 0; i < Actors.Count; ++i)
+			{
+				Actors[i].Tick(deltaTime);
+			}
+		}
+	}
+}

GLWidgetTestGTK3/interfaces/MainWindow.glade

@@ -0,0 +1,194 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.16.1 -->
+<interface>
+  <requires lib="gtk+" version="3.10"/>
+  <object class="GtkWindow" id="MainWindow">
+    <property name="can_focus">False</property>
+    <child>
+      <object class="GtkBox" id="MainBox">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="orientation">vertical</property>
+        <child>
+          <object class="GtkAlignment" id="alignment1">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <child>
+              <object class="GtkMenuBar" id="MainMenuBar">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <child>
+                  <object class="GtkMenuItem" id="menuitem1">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="label" translatable="yes">_File</property>
+                    <property name="use_underline">True</property>
+                    <child type="submenu">
+                      <object class="GtkMenu" id="menu1">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <child>
+                          <object class="GtkImageMenuItem" id="imagemenuitem1">
+                            <property name="label">gtk-new</property>
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="use_underline">True</property>
+                            <property name="use_stock">True</property>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkImageMenuItem" id="imagemenuitem2">
+                            <property name="label">gtk-open</property>
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="use_underline">True</property>
+                            <property name="use_stock">True</property>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkImageMenuItem" id="imagemenuitem3">
+                            <property name="label">gtk-save</property>
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="use_underline">True</property>
+                            <property name="use_stock">True</property>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkImageMenuItem" id="imagemenuitem4">
+                            <property name="label">gtk-save-as</property>
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="use_underline">True</property>
+                            <property name="use_stock">True</property>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkSeparatorMenuItem" id="separatormenuitem1">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkImageMenuItem" id="imagemenuitem5">
+                            <property name="label">gtk-quit</property>
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="use_underline">True</property>
+                            <property name="use_stock">True</property>
+                          </object>
+                        </child>
+                      </object>
+                    </child>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkMenuItem" id="menuitem2">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="label" translatable="yes">_Edit</property>
+                    <property name="use_underline">True</property>
+                    <child type="submenu">
+                      <object class="GtkMenu" id="menu2">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <child>
+                          <object class="GtkImageMenuItem" id="imagemenuitem6">
+                            <property name="label">gtk-cut</property>
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="use_underline">True</property>
+                            <property name="use_stock">True</property>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkImageMenuItem" id="imagemenuitem7">
+                            <property name="label">gtk-copy</property>
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="use_underline">True</property>
+                            <property name="use_stock">True</property>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkImageMenuItem" id="imagemenuitem8">
+                            <property name="label">gtk-paste</property>
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="use_underline">True</property>
+                            <property name="use_stock">True</property>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkImageMenuItem" id="imagemenuitem9">
+                            <property name="label">gtk-delete</property>
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="use_underline">True</property>
+                            <property name="use_stock">True</property>
+                          </object>
+                        </child>
+                      </object>
+                    </child>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkMenuItem" id="menuitem3">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="label" translatable="yes">_View</property>
+                    <property name="use_underline">True</property>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkMenuItem" id="menuitem4">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="label" translatable="yes">_Help</property>
+                    <property name="use_underline">True</property>
+                    <child type="submenu">
+                      <object class="GtkMenu" id="menu3">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <child>
+                          <object class="GtkImageMenuItem" id="imagemenuitem10">
+                            <property name="label">gtk-about</property>
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="use_underline">True</property>
+                            <property name="use_stock">True</property>
+                          </object>
+                        </child>
+                      </object>
+                    </child>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkAlignment" id="GLWidgetAlignment">
+            <property name="width_request">500</property>
+            <property name="height_request">400</property>
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <child>
+              <placeholder/>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">True</property>
+            <property name="fill">True</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>