made some adaptations and fixed some bugs

src/EngineSharp.Core/EngineSharp.Core/ECS/Entity.cs

@@ -67,7 +67,7 @@ public class Entity
      internal void RenderComponents(GL gl, Matrix4X4<float> projectionMatrix, Matrix4X4<float> viewMatrix)
      {
           // TODO: retrieve the data component "Transform" which every Entity must have (although currently there is no transform component)
-          var modelMatrix = Matrix4X4.CreateTranslation(0, 0, -10f);
+          var modelMatrix = Matrix4X4<float>.Identity * Matrix4X4.CreateFromQuaternion(Quaternion<float>.Identity) * Matrix4X4.CreateScale(2.0f) * Matrix4X4.CreateTranslation(0, 0, 0f);
           
           foreach (var components in _renderComponents)
           {

src/EngineSharp.Core/EngineSharp.Core/OpenGLEngine.cs

@@ -96,7 +96,7 @@ internal class OpenGLEngine : Engine
         _gl.ClearColor(Color.Black);
         _gl.Enable(EnableCap.DepthTest);
         
-        _camera = new PerspectiveCamera(Vector3D<float>.Zero, _window.FramebufferSize);
+        _camera = new PerspectiveCamera(new Vector3D<float>(0.0f, 0.0f, 3.0f), _window.FramebufferSize);
 
         InitialiseShaders(Directory.GetFiles("./assets/shaders", "*.vert"));
         SetCurrentScene(_defaultSceneName);

src/EngineSharp.Core/EngineSharp.Core/Rendering/MeshRenderer.cs

@@ -14,6 +14,7 @@ public class MeshRenderer : RenderComponent
     internal override void Render(GL gl, Matrix4X4<float> projectionMatrix, Matrix4X4<float> viewMatrix, Matrix4X4<float> modelMatrix)
     {
         GenerateRenderableMesh(gl, projectionMatrix, viewMatrix, modelMatrix);
+        Mesh.PrepareForRendering(projectionMatrix, viewMatrix, modelMatrix);
         gl.DrawElements(PrimitiveType.Triangles, (uint)Mesh.Indices.Length, DrawElementsType.UnsignedInt, 0);
     }
 
@@ -25,8 +26,7 @@ public class MeshRenderer : RenderComponent
         if(vbo == 0) { vbo = gl.GenBuffer(); }
         if(ebo == 0) { ebo = gl.GenBuffer(); }
 
-        Mesh.PrepareForRendering(projectionMatrix, viewMatrix, modelMatrix);
-        var meshData = new float[Mesh.Vertices.Length * 3 + Mesh.Indices.Length * 3];
+        var meshData = new float[Mesh.Vertices.Length * 3 + Mesh.Normals.Length * 3];
         for (int i = 0, insert = 0; i < Mesh.Vertices.Length; i++, insert += 6)
         {
             meshData[insert] = Mesh.Vertices[i].X;

src/EngineSharp/assets/shaders/sphere.frag

@@ -1,6 +1,6 @@
 #version 330 core
 
-out vec4 FragColour;
+out vec4 FragColor;
 
 in vec3 FragPos;
 in vec3 Normal;
@@ -9,5 +9,5 @@ in vec3 Normal;
 void main()
 {
     vec3 col = vec3(1.0, 0.5, 0.2) * FragPos;
-    FragColour = vec4(col, 1);
+    FragColor = vec4(1);
 }