Basic and working entity system with a really ugly test case

include/Engine/Core/World.h

@@ -2,32 +2,35 @@
 #define World_h__
 
 #include "../Common.h"
-#include "Entity.h"
+#include "EntityWrapper.h"
+#include "ObjectPool.h"
 #include "ComponentPool.h"
 
 class World
 {
 public:
-	World()
-	{
+    World() = default;
+    ~World();
 
-	}
+    EntityID CreateEntity(EntityID parent = 0);
 
-    ~World()
-    {
-        // foreach (m_ComponentPools...
-    }
-
-    void AllocateComponentPool(ComponentInfo& ci)
-    {
-        auto pool = new ComponentPool(ci);
-        m_ComponentPools[ci.Name] = pool;
-    }
-
-    void AddComponent(EntityID entity, std::string componentType);
+    // Register a component type and allocate space for it
+    void RegisterComponent(ComponentInfo& ci);
+    // Attach a component to an entity and fill it with default values
+    ComponentWrapper AttachComponent(EntityID entity, std::string componentType);
+    // Get a component of an entity
+    ComponentWrapper GetComponent(EntityID entity, std::string componentType);
+    // Get all components of the specified type
+    const ComponentPool& GetComponents(std::string componentType);
 
 private:
+    EntityID m_CurrentEntityID = 0;
+
+    std::unordered_map<EntityID, EntityID> m_EntityParents;
+    std::unordered_multimap<EntityID, EntityID> m_EntityChildren;
     std::unordered_map<std::string, ComponentPool*> m_ComponentPools;
+
+    EntityID generateEntityID();
 };
 
 #endif