Updated structure and took first steps for a better architecture

Nebulix/Nebulix.csproj

@@ -1,13 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="Silk.NET.Input" Version="2.20.0" />
+    <PackageReference Include="Silk.NET.OpenGL" Version="2.20.0" />
   </ItemGroup>
 
 </Project>

Nebulix/Rendering/Material.cs

@@ -0,0 +1,13 @@
+using Silk.NET.Core.Native;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Nebulix.Rendering
+{
+	public record class Material(Shader Shader)
+	{
+	}
+}

Nebulix/Rendering/Mesh.cs

@@ -0,0 +1,60 @@
+using Silk.NET.OpenGL;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Nebulix.Rendering
+{
+	public sealed class Mesh
+	{
+		public float[] Vertices { get => vertices; set { vertices = value; regenerate = true; } }
+		public float[] Indices { get => indices; set { indices = value; regenerate = true; } }
+		public float[] Normals { get => normals; }
+		
+		private uint vao = 0, vbo = 0, ebo = 0;
+		private bool regenerate = true;
+
+		private float[] vertices = [];
+		private float[] indices = [];
+		private float[] normals = [];
+
+
+		// getting called by "Engine" which currently is in other assembly, meaning I probably need to make this public
+		internal void Use(GL gl) 
+		{
+			if (regenerate) Generate(gl);
+
+			gl.BindVertexArray(vao);
+
+		}
+
+		private unsafe void Generate(GL gl)
+		{
+			if(vao == 0)
+				vao = gl.CreateVertexArray();
+			if(vbo == 0)
+				vbo = gl.GenBuffer();
+			if(ebo == 0) 
+				ebo = gl.GenBuffer();
+
+			gl.BindVertexArray(vao);
+
+			// TODO: verticesData needs to also contain "normals" not just vertices (and uv coords if I decide to add some)
+			ReadOnlySpan<float> verticesData = new(vertices);
+			gl.BindBuffer(BufferTargetARB.ArrayBuffer, vbo);
+			gl.BufferData(BufferTargetARB.ArrayBuffer, (nuint)(verticesData.Length * sizeof(float)), verticesData, BufferUsageARB.StaticDraw);
+
+			ReadOnlySpan<float> indicesData = new(indices);
+			gl.BindBuffer(BufferTargetARB.ElementArrayBuffer, ebo);
+			gl.BufferData(BufferTargetARB.ElementArrayBuffer, (nuint)(indicesData.Length * sizeof(uint)), indicesData, BufferUsageARB.StaticDraw);
+
+			// vertices
+			gl.EnableVertexAttribArray(0);
+			gl.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, 6 * sizeof(float), (void*)0);
+			gl.EnableVertexAttribArray(1);
+			gl.VertexAttribPointer(1, 3, VertexAttribPointerType.Float, false, 6 * sizeof(float), (void*)(3 * sizeof(float)));
+		}
+	}
+}

Nebulix/Rendering/Shaders/Shader.cs

@@ -2,7 +2,7 @@
 using Silk.NET.OpenGL;
 using System.Numerics;
 
-namespace Engine_silk.NET.Shaders;
+namespace Nebulix.Rendering;
 
 public class Shader
 {

Nebulix/Rendering/Shaders/ShaderCompileException.cs

@@ -5,7 +5,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace Engine_silk.NET.Shaders;
+namespace Nebulix.Rendering;
 
 
 [Serializable]

Nebulix/Rendering/Shaders/ShaderLinkException.cs

@@ -4,7 +4,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace Engine_silk.NET.Shaders;
+namespace Nebulix.Rendering;
 
 
 [Serializable]

src/Engine_silk.NET.csproj

@@ -32,6 +32,7 @@
 
   <ItemGroup>
     <Folder Include="images\" />
+    <Folder Include="Shaders\" />
   </ItemGroup>
 
   <ItemGroup>

src/Program.cs

@@ -2,6 +2,7 @@
 
 using Engine_silk.NET.Textures;
 using Nebulix.InputSystem;
+using Nebulix.Rendering;
 using Silk.NET.Input;
 using Silk.NET.Maths;
 using Silk.NET.OpenGL;
@@ -23,7 +24,7 @@ public static class Program
 
 	private static IWindow _window;
 	private static GL _gl;
-	private static Shaders.Shader _shader;
+	private static Nebulix.Rendering.Shader _shader;
 	private static Texture2D _texture;
 	private static Camera _cam;
 	private static Vector2 _lastMousePosition;
@@ -147,7 +148,7 @@ public static class Program
 		//fixed (uint* buffer = indices)
 		//	_gl.BufferData(BufferTargetARB.ElementArrayBuffer, (nuint)(indices.Length * sizeof(uint)), buffer, BufferUsageARB.StaticDraw);
 
-		_shader = new Shaders.Shader(_gl, "shader.vert", "shader.frag");
+		_shader = new Nebulix.Rendering.Shader(_gl, "shader.vert", "shader.frag");
 
 		_gl.EnableVertexAttribArray(0);
 		_gl.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, 8 * sizeof(float), (void*)0);

src/Sphere.cs

@@ -1,4 +1,5 @@
-using Silk.NET.Maths;
+using Nebulix.Rendering;
+using Silk.NET.Maths;
 using Silk.NET.OpenGL;
 
 namespace Engine_silk.NET
@@ -43,35 +44,40 @@ namespace Engine_silk.NET
 			return new ReadOnlySpan<float>(finalArray);
 		}
 
-		/// <param name="normal">The unit vector in which the side should point. E.g. Vector.Up</param>
-		private (float[], float[]) GetSide(Vector3D<float> normal)
+
+		[Obsolete("Use Sphere.GetFace(Vector3D<float>) instead")]
+		private (float[], float[]) GetSide(Vector3D<float> localUp)
 		{
-			//float upperBound = radius, lowerBound = -radius;
+
 			float stepSize = 2f / resolution;
 
 			List<float> vertices = new((int)(3 * resolution * resolution * 2)); // resolution * resolution == number of rows/columns; 3 * ... == each vertex has 3 positions; 2 * ... == vertex also needs normal
 
-			Vector3D<float> position = normal;
-			for (int row = 0; row <= resolution; row++)
+			Vector3D<float> position = localUp;
+			for (uint y = 0; y <= resolution; y++)
 			{
-				for (int col = 0; col <= resolution; col++)
+				for (uint x = 0; x <= resolution; x++)
 				{
-					if (normal.X != 0)
+					uint i = x + y * resolution;
+					Vector2D<float> percent = new Vector2D<float>(x, y) / (resolution - 1);
+					//Vector3D<float> pointOnUnitCube = localUp + (percent.X - 0.5f) * stepSize * 
+
+					if (localUp.X != 0)
 					{
-						position.Y = row * stepSize - 1;
-						position.Z = col * stepSize - 1;
+						position.Y = x * stepSize - 1;
+						position.Z = y * stepSize - 1;
 					}
-					else if (normal.Y != 0)
+					else if (localUp.Y != 0)
 					{
-						position.X = row * stepSize - 1;
-						position.Z = col * stepSize - 1;
+						position.X = x * stepSize - 1;
+						position.Z = y * stepSize - 1;
 					}
-					else if (normal.Z != 0)
+					else if (localUp.Z != 0)
 					{
-						position.X = row * stepSize - 1;
-						position.Y = col * stepSize - 1;
+						position.X = x * stepSize - 1;
+						position.Y = y * stepSize - 1;
 					}
-                    vertices.AddRange([position.X, position.Y, position.Z, normal.X, normal.Y, normal.Z]);
+                    vertices.AddRange([position.X, position.Y, position.Z, localUp.X, localUp.Y, localUp.Z]);
 				}
 			}
 
@@ -97,26 +103,21 @@ namespace Engine_silk.NET
             return (vertices.ToArray(), []);
 		}
 
-		// top left origin, stepsizeX, stepsizeY (maybe index of first vertex?)
 		// https://youtu.be/QN39W020LqU?si=a66D1Lnic1vNaC6l&t=89
-		private Face Quad(uint resolution, uint row, uint column)
+		// https://github.com/SebLague/Procedural-Planets/blob/master/Procedural%20Planet%20E01/Assets/TerrainFace.cs
+		/// <param name="localUp">The unit vector in which the side should point. E.g. Vector.UnitX</param>
+		public Mesh GetFace(Vector3D<float> localUp)
 		{
-			// TODO: change coordinates according to the direction the quad should be looking
-			// https://catlikecoding.com/unity/tutorials/procedural-meshes/cube-sphere/
-			float[] vertices = [
-				 1.0f,  1.0f, 0.0f,  // top right
-				 1.0f, -1.0f, 0.0f,  // bottom right
-				-1.0f, -1.0f, 0.0f,  // bottom left
-				-1.0f,  1.0f, 0.0f   // top left 
-			];
-			uint[] indices = [
-				0, 1, 3,   // first triangle
-				1, 2, 3    // second triangle
-			];
-
-			return new Face(vertices, indices);
+			// this all probably needs to be rewritten to use the "Face" record below and split the stuff better
+			return new Mesh();
 		}
 	}
 
-	internal record struct Face(float[] Vertices, uint[] Indices);
+	internal record struct Face
+	{
+		public Face()
+		{
+
+		}
+	}
 }