Merge pull request #1 from skalldri/destroy_all_with

Add DestroyAllWith function to EntityManager

include/ecs/EntityManager.hh

@@ -86,6 +86,14 @@ namespace ecs
 		 */
 		void DestroyAll();
 
+		/**
+		 * Calls Destroy() on all Entities that match a specific KeyType value.
+		 * 
+		 * This function will only find components added with the AssignKey() function.
+		 */
+		template <typename KeyType, typename... CompTypes>
+		void DestroyAllWith(const KeyType &key);
+
 		/**
 		 * Check if the entity is still valid in the system.
 		 * An entity is invalid if it is not currently present in the system.

include/ecs/EntityManagerImpl.hh

@@ -205,6 +205,17 @@ namespace ecs
 		}
 	}
 
+	template<typename KeyType, typename... CompTypes>
+	inline void EntityManager::DestroyAllWith(const KeyType &key) 
+	{
+		auto entityCollection = EntitiesWith<KeyType, CompTypes...>(key);
+
+		for (auto ent : entityCollection) 
+		{
+			ent.Destroy();
+		}
+	}
+
 	inline bool EntityManager::Valid(Entity::Id e) const
 	{
 		return e && e.Generation() == entIndexToGen.at(e.Index());