Sdk/BaseComponent: Add OnEntityDisabled and OnEntityEnabled callbacks

SDK/src/NDK/BaseComponent.cpp

@@ -63,6 +63,26 @@ namespace Ndk
 	{
 	}
 
+	/*!
+	* \brief Operation to perform when the entity is disabled
+	*
+	* \remark Disabling an entity will remove it from systems it belongs to, but sometimes the entity will need to do
+	*         additional work in order to be properly disabled (i.e.: disabling physics simulation & collisions)
+	*/
+	void BaseComponent::OnEntityDisabled()
+	{
+	}
+
+	/*!
+	* \brief Operation to perform when the entity is disabled
+	*
+	* \remark Enabling an entity will add it back to systems it belongs to, but sometimes the entity will need to do
+	*         additional work in order to be properly re-enabled (i.e.: enabling physics simulation & collisions)
+	*/
+	void BaseComponent::OnEntityEnabled()
+	{
+	}
+
 	std::vector<BaseComponent::ComponentEntry> BaseComponent::s_entries;
 	std::unordered_map<ComponentId, ComponentIndex> BaseComponent::s_idToIndex;
 }

SDK/src/NDK/Entity.cpp

@@ -96,6 +96,10 @@ namespace Ndk
 				m_components[i]->OnComponentAttached(component);
 		}
 
+		// If we are currently disabled, inform the component
+		if (!m_enabled)
+			component.OnEntityDisabled();
+
 		return component;
 	}
 
@@ -106,7 +110,6 @@ namespace Ndk
 	* \remark The close is enable by default, even if the original is disabled
 	* \remark Produces a NazaraAssert if the entity is not valid
 	*/
-
 	const EntityHandle& Entity::Clone() const
 	{
 		NazaraAssert(IsValid(), "Invalid entity");
@@ -114,10 +117,34 @@ namespace Ndk
 		return m_world->CloneEntity(m_id);
 	}
 
+	/*!
+	* \brief Enables the entity
+	*
+	* \param enable Should the entity be enabled
+	*/
+	void Entity::Enable(bool enable)
+	{
+		if (m_enabled != enable)
+		{
+			m_enabled = enable;
+			if (m_enabled)
+			{
+				for (std::size_t i = m_componentBits.FindFirst(); i != m_componentBits.npos; i = m_componentBits.FindNext(i))
+					m_components[i]->OnEntityEnabled();
+			}
+			else
+			{
+				for (std::size_t i = m_componentBits.FindFirst(); i != m_componentBits.npos; i = m_componentBits.FindNext(i))
+					m_components[i]->OnEntityDisabled();
+			}
+
+			Invalidate();
+		}
+	}
+
 	/*!
 	* \brief Kills the entity
 	*/
-
 	void Entity::Kill()
 	{
 		m_world->KillEntity(this);

SDK/src/NDK/World.cpp

@@ -138,12 +138,11 @@ namespace Ndk
 	*
 	* \param id Identifier of the entity
 	*
-	* \remark Produces a NazaraError if the entity to clone does not exist
+	* \remark Cloning a disabled entity will produce an enabled clone
 	*/
-
 	const EntityHandle& World::CloneEntity(EntityId id)
 	{
-		EntityHandle original = GetEntity(id);
+		const EntityHandle& original = GetEntity(id);
 		if (!original)
 		{
 			NazaraError("Invalid entity ID");
@@ -151,6 +150,8 @@ namespace Ndk
 		}
 
 		const EntityHandle& clone = CreateEntity();
+		if (!original->IsEnabled())
+			clone->Disable();
 
 		const Nz::Bitset<>& componentBits = original->GetComponentBits();
 		for (std::size_t i = componentBits.FindFirst(); i != componentBits.npos; i = componentBits.FindNext(i))
@@ -159,6 +160,8 @@ namespace Ndk
 			clone->AddComponent(std::move(component));
 		}
 
+		clone->Enable();
+
 		return clone;
 	}