adding a screen renderer system

sources/System/Renderer/RenderScreenSystem.hpp

@@ -0,0 +1,50 @@
+//
+// Created by cbihan on 26/05/2021.
+//
+
+#pragma once
+
+#include "System/System.hpp"
+#include "Camera/Camera2D.hpp"
+#include "Window.hpp"
+
+namespace BBM
+{
+	template <class  T>
+	class RenderScreenSystem : public WAL::System
+	{
+		//! @brief The window to render on
+		RAY::Window &_window;
+		//! @brief The camera
+		T &_camera;
+	public:
+		//! @brief ctor
+		explicit RenderScreenSystem(RAY::Window &window, T camera)
+			: WAL::System({typeid(RenderScreenSystem)}),
+			  _window(window),
+			  _camera(camera)
+		{
+		}
+
+		//! @brief A method called after all entities that this system manage has been updated.
+		//! @note render on screen here
+		void onSelfUpdate() override
+		{
+			this->_window.unuseCamera();
+			this->_window.setDrawingState(RAY::Window::IDLE);
+			this->_camera.update();
+			this->_window.setDrawingState(RAY::Window::DRAWING);
+			this->_window.clear();
+			this->_window.useCamera(_camera);
+		}
+
+		//! @brief Default copy ctor
+		RenderScreenSystem(const RenderScreenSystem &) = delete;
+		//! @brief Default dtor
+		~RenderScreenSystem() override = default;
+		//! @brief Default assignment operator
+		RenderScreenSystem &operator=(const RenderScreenSystem &) = delete;
+
+	};
+
+}