fixed bug and "started" ECS

src/EngineSharp.Core/EngineSharp.Core/ECS/GameObject.cs

@@ -0,0 +1,12 @@
+namespace EngineSharp.Core.ECS;
+
+// TODO: A GameObject would have a list of Components. A GameObject is basically what will be stored in the scene graph and all components of all GameObjects will have their Update methods etc. be called
+
+// Maybe look at this C# ECS to get an idea of how to implement one myself
+// https://github.com/friflo/Friflo.Engine.ECS/tree/main
+public abstract class GameObject
+{
+    private long Id { get; set; }
+    
+    public abstract void OnUpdate(double deltaTime);
+}

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

@@ -58,7 +58,7 @@ internal class OpenGLEngine : IEngine
         var viewMatrix = _camera.ViewMatrix;
         
         // TODO: Here render all meshes etc.
-        // On constructing a MeshRenderer, register it somewhere so it can be rendered here (MeshRenderer would then be a component while Mesh would be a normal C# object in the context of a ECS)
+        // On constructing a MeshRenderer, register it somewhere so it can be rendered here (MeshRenderer would then be a component while Mesh would be a normal C# object in the context of an ECS)
         // MeshRenderer contains a mesh; Mesh contains a material; Material contains a shader and the values for all uniforms of the shader (apart from the matrices; I am not sure how to best handle the model matrix with this approach)
     }
     

src/EngineSharp.Core/EngineSharp.Core/PerspectiveCamera.cs

@@ -48,7 +48,7 @@ public class PerspectiveCamera
             return Matrix4X4.CreateLookAt(_position, _position + _intrinsicCoordinates.Column3, _worldUp); // TODO: I hope this is Left-Handed. If not I need to update the readme
         }
     }
-    public Matrix4X4<float> ProjectionMatrix => Matrix4X4.CreatePerspectiveFieldOfView(Fov, _aspectRatio, NearClippingPlane, FarClippingPlane);
+    public Matrix4X4<float> ProjectionMatrix => Matrix4X4.CreatePerspectiveFieldOfView(Fov.ToRadians(), _aspectRatio, NearClippingPlane, FarClippingPlane);
     
     public PerspectiveCamera(Vector3D<float> position, Vector2D<int> viewportDimensions, float yaw = -90.0f, float pitch = 0, float fov = 45.0f, float nearClippingPlane = 0.1f, float farClippingPlane = 100.0f)
     {