Added layer system

include/lol/Layer.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <string>
+
+namespace lol
+{
+	class CameraBase;
+
+	class Layer
+	{
+	public:
+		Layer(const std::string& debugName);
+		virtual ~Layer();
+
+		virtual void OnAttach() {}
+		virtual void OnDetach() {}
+
+		virtual void OnUpdate() {}
+		virtual void OnRender(CameraBase& camera) {}
+
+		inline const std::string& GetDebugName() { return debugName; }
+
+	private:
+		std::string debugName;
+	};
+
+}

include/lol/lol.hpp

@@ -7,4 +7,5 @@
 #include <lol/Texture.hpp>
 #include <lol/Image.hpp>
 #include <lol/Camera.hpp>
-#include <lol/util/BoundingBox.hpp>
+#include <lol/util/BoundingBox.hpp>
+#include <lol/Layer.hpp>