another try at fixing the mesh class (maybe mesh class is not the problem after all?)

Nebulix/ArrayExtensions.cs

@@ -28,6 +28,7 @@ namespace Nebulix
 				result[resultIdx] = array[i].X;
 				result[resultIdx + 1] = array[i].Y;
 				result[resultIdx + 2] = array[i].Z;
+				resultIdx += 3;
 			}
 
 			return result;

Nebulix/Rendering/Mesh.cs

@@ -46,12 +46,16 @@ namespace Nebulix.Rendering
 		
 		// getting called by "Engine" which currently is in another assembly, meaning I probably need to make this public
 		// needs to be change for the real engine
+		/// <summary>
+		/// Binds the necessary buffers and draws the mesh. Does not use any Shaders 
+		/// </summary>
+		/// <param name="gl"></param>
 		public void Render(GL gl)
 		{
 			if (regenerate) Generate(gl);
 
 			gl.BindVertexArray(vao);
-			gl.DrawElements(PrimitiveType.Triangles, (uint)vertices.Length * 3, DrawElementsType.UnsignedInt, 0);
+			gl.DrawElements(PrimitiveType.Triangles, (uint)indices.Length, DrawElementsType.UnsignedInt, 0);
 		}
 
 		private unsafe void Generate(GL gl)
@@ -60,13 +64,13 @@ namespace Nebulix.Rendering
 
 			if(vao == 0)
 				vao = gl.CreateVertexArray();
+			gl.BindVertexArray(vao);
+
 			if(vbo == 0)
 				vbo = gl.GenBuffer();
 			if(ebo == 0) 
 				ebo = gl.GenBuffer();
 
-			gl.BindVertexArray(vao);
-
 			List<float> meshData = new(vertices.Length * 3 + normals.Length * 3);
 			meshData.AddRange(vertices.ExtractComponents());
 			//meshData.AddRange(normals.ExtractComponents());

src/Program.cs

@@ -1,4 +1,6 @@
-namespace Engine_silk.NET;
+using Nebulix;
+
+namespace Engine_silk.NET;
 
 using Engine_silk.NET.Textures;
 using Nebulix.InputSystem;
@@ -28,9 +30,9 @@ public static class Program
 	private static Texture2D _texture;
 	private static Camera _cam;
 	private static Vector2 _lastMousePosition;
-	private static uint _vao, _vbo, _ebo;
+	private static uint _vao, _vbo;
 	private static Sphere sphere;
-
+	private static Mesh testMesh;
 
 	public static void Main(string[] args)
 	{
@@ -54,7 +56,7 @@ public static class Program
 		_gl = _window.CreateOpenGL();
 		_gl.ClearColor(Color.CornflowerBlue);
 		_gl.Enable(EnableCap.DepthTest);
-		//_gl.PolygonMode(GLEnum.FrontAndBack, GLEnum.Fill);
+		// _gl.PolygonMode(GLEnum.FrontAndBack, GLEnum.Fill);
 
 		_cam = new Camera(new(0.0f, 0.0f, 3.0f));
 		IInputContext input = _window.CreateInput();
@@ -118,37 +120,13 @@ public static class Program
 			-0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,  0.0f, 0.0f,
 			-0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,  0.0f, 1.0f
 		};
+
 		ReadOnlySpan<float> verticesData = new(vertices);
-		//uint[] indices =
-		//{
-		//	0u, 1u, 3u,
-		//	1u, 2u, 3u,
-
-		//	4u, 5u, 7u,
-		//	5u, 6u, 7u,
-
-		//	3u, 2u, 7u,
-		//	7u, 2u, 6u,
-
-		//	0u, 4u, 5u,
-		//	0u, 5u, 1u,
-
-		//	0u, 3u, 7u,
-		//	0u, 7u, 4u,
-
-		//	1u, 6u, 5u,
-		//	1u, 2u, 6u
-		//};
 
 		_vbo = _gl.GenBuffer();
 		_gl.BindBuffer(BufferTargetARB.ArrayBuffer, _vbo);
 		_gl.BufferData(BufferTargetARB.ArrayBuffer, (nuint)(verticesData.Length * sizeof(float)), verticesData, BufferUsageARB.StaticDraw);
 		
-		//_ebo = _gl.GenBuffer();
-		//_gl.BindBuffer(BufferTargetARB.ElementArrayBuffer, _ebo);
-		//fixed (uint* buffer = indices)
-		//	_gl.BufferData(BufferTargetARB.ElementArrayBuffer, (nuint)(indices.Length * sizeof(uint)), buffer, BufferUsageARB.StaticDraw);
-
 		_shader = new Nebulix.Rendering.Shader(_gl, "shader.vert", "shader.frag");
 
 		_gl.EnableVertexAttribArray(0);
@@ -166,6 +144,24 @@ public static class Program
 		sphere.CreateSphere();
 		_sphereShader =
 			new Nebulix.Rendering.Shader(_gl, "./Shaders/Sphere/sphere.vert", "./Shaders/Sphere/sphere.frag");
+
+		testMesh = new Mesh
+		{
+			Vertices =
+			[
+				new Vector3D<float>(0.5f, 0.5f, 0.0f),
+				new Vector3D<float>(0.5f, -0.5f, 0.0f),
+				new Vector3D<float>(-0.5f, -0.5f, 0.0f),
+				new Vector3D<float>(-0.5f, 0.5f, 0.5f)
+			],
+			Indices =
+			[
+				0u, 1u, 3u,
+				1u, 2u, 3u
+			]
+		};
+		testMesh.CalculateNormals();
+
 	}
 
 	private static void OnUpdate(double deltaTime)
@@ -203,24 +199,26 @@ public static class Program
 		var viewMatrix = _cam.ViewMatrix;
 		var projectionMatrix = Matrix4X4.CreatePerspectiveFieldOfView(Maths.Convert.ToRadians(_cam.Fov), Width / (float)Height, 0.1f, 100.0f);
 		
-		// _shader.Use();
-		// _shader.SetMatrix("modelMatrix", modelMatrix);
-		// _shader.SetMatrix("projectionMatrix", projectionMatrix);
-		// _shader.SetMatrix("viewMatrix", viewMatrix);
-		//
-		// _shader.SetInt("tex", 0);
-		// _texture.Bind();
-		//
+		_shader.Use();
+		_shader.SetMatrix("modelMatrix", modelMatrix);
+		_shader.SetMatrix("projectionMatrix", projectionMatrix);
+		_shader.SetMatrix("viewMatrix", viewMatrix);
+		
+		_shader.SetInt("tex", 0);
+		_texture.Bind();
+		
 		// _gl.BindVertexArray(_vao);
 		// _gl.DrawArrays(PrimitiveType.Triangles, 0, 36);
 
 		// Sphere
-		// modelMatrix = Matrix4x4.CreateTranslation(1, 0, 1);
+		modelMatrix = Matrix4x4.CreateTranslation(0, 0, 0);
 		_sphereShader.Use();
 		_sphereShader.SetMatrix("modelMatrix", modelMatrix);
 		_sphereShader.SetMatrix("projectionMatrix", projectionMatrix);
 		_sphereShader.SetMatrix("viewMatrix", viewMatrix);
-		sphere.RenderSphere(_gl);
+
+		// sphere.RenderSphere(_gl);
+		testMesh.Render(_gl);
 
 		// var f = new Face(-Vector3D<float>.UnitX, 10);
 		// f.GetMesh().Render(_gl);

src/Shaders/Sphere/sphere.vert

@@ -1,7 +1,8 @@
 #version 330 core
 
 layout (location = 0) in vec3 aPosition;
-layout (location = 1) in vec3 normalVector;
+//layout (location = 1) in vec3 normalVector;
+
 
 uniform mat4 modelMatrix;
 uniform mat4 viewMatrix;
@@ -13,7 +14,6 @@ out vec3 FragPos;
 void main()
 {
     vec4 pos = vec4(aPosition, 1.0);
-
     // TODO: calculate the inverse of the model matrix beforehand since "inverse()" is very costly to calculate for every vertex
 //    Normal = mat3(transpose(inverse(modelMatrix))) * normalVector;
     FragPos = vec3(modelMatrix * pos);