Cleaning up shutdown

HydraEngine/source/ecs/HydraSystem.cpp

@@ -6,7 +6,14 @@ void HydraSystem::Update(float delta_t_seconds)
     UpdateSystem(delta_t_seconds);
     
 }
-
+void HydraSystem::Shutdown()
+{
+    for(HydraID entity_id : Entities)
+    {
+        DestroyComponents(entity_id);
+    }
+    FreeSystemResources();
+}
 void HydraSystem::InitialiseComponents()
 {
     for(auto it = EntitiesToCreate.begin(); it != EntitiesToCreate.end(); ++it)
@@ -16,3 +23,13 @@ void HydraSystem::InitialiseComponents()
     }
     EntitiesToCreate.clear();
 }
+
+void HydraSystem::DestroyComponents(HydraID actor_id)
+{
+    auto it = std::find(Entities.begin(), Entities.end(), actor_id);
+    if(it == Entities.end())
+    {
+        return;
+    }
+    DestroyComponent(actor_id);
+}