Core: Add Lifetime component and system

src/Nazara/Core/Systems/LifetimeSystem.cpp

@@ -0,0 +1,21 @@
+// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Core/Systems/LifetimeSystem.hpp>
+#include <Nazara/Core/Components/LifetimeComponent.hpp>
+#include <Nazara/Core/Debug.hpp>
+
+namespace Nz
+{
+	void LifetimeSystem::Update(float elapsedTime)
+	{
+		auto view = m_registry.view<LifetimeComponent>();
+		for (auto [entity, lifetimeComponent] : view.each())
+		{
+			lifetimeComponent.DecreaseLifetime(elapsedTime);
+			if (!lifetimeComponent.IsAlive())
+				m_registry.destroy(entity);
+		}
+	}
+}