Sdk/BaseComponent: Add OnEntityDestruction callback

Also fixes physics component callbacks (OnContactEnd by example) being
fired while entity is destroyed

SDK/include/NDK/BaseComponent.hpp

@@ -47,6 +47,7 @@ namespace Ndk
 			virtual void OnComponentAttached(BaseComponent& component);
 			virtual void OnComponentDetached(BaseComponent& component);
 			virtual void OnDetached();
+			virtual void OnEntityDestruction();
 
 			void SetEntity(Entity* entity);
 

SDK/include/NDK/Components/PhysicsComponent2D.hpp

@@ -55,6 +55,7 @@ namespace Ndk
 			void OnComponentAttached(BaseComponent& component) override;
 			void OnComponentDetached(BaseComponent& component) override;
 			void OnDetached() override;
+			void OnEntityDestruction() override;
 
 			std::unique_ptr<Nz::RigidBody2D> m_object;
 	};

SDK/include/NDK/Components/PhysicsComponent3D.hpp

@@ -62,6 +62,7 @@ namespace Ndk
 			void OnComponentAttached(BaseComponent& component) override;
 			void OnComponentDetached(BaseComponent& component) override;
 			void OnDetached() override;
+			void OnEntityDestruction() override;
 
 			std::unique_ptr<Nz::RigidBody3D> m_object;
 	};

SDK/src/NDK/BaseComponent.cpp

@@ -54,6 +54,15 @@ namespace Ndk
 	{
 	}
 
+	/*!
+	* \brief Operation to perform when the entity is destroyed and we're still attached to it
+	*
+	* \remark This is always called before the entity proper destruction, and thus its components.
+	*/
+	void BaseComponent::OnEntityDestruction()
+	{
+	}
+
 	std::vector<BaseComponent::ComponentEntry> BaseComponent::s_entries;
 	std::unordered_map<ComponentId, ComponentIndex> BaseComponent::s_idToIndex;
 }

SDK/src/NDK/Components/PhysicsComponent2D.cpp

@@ -88,5 +88,11 @@ namespace Ndk
 		m_object.reset();
 	}
 
+	void PhysicsComponent2D::OnEntityDestruction()
+	{
+		// Kill rigidbody before entity destruction to force contact callbacks to be called while the entity is still valid
+		m_object.reset();
+	}
+
 	ComponentIndex PhysicsComponent2D::componentIndex;
 }

SDK/src/NDK/Components/PhysicsComponent3D.cpp

@@ -88,5 +88,12 @@ namespace Ndk
 		m_object.reset();
 	}
 
+	void PhysicsComponent3D::OnEntityDestruction()
+	{
+		// Kill rigid body before entity destruction to force contact callbacks to be called while the entity is still valid
+		m_object.reset();
+
+	}
+
 	ComponentIndex PhysicsComponent3D::componentIndex;
 }

SDK/src/NDK/Entity.cpp

@@ -145,6 +145,10 @@ namespace Ndk
 
 	void Entity::Destroy()
 	{
+		// We prepare components for entity destruction (some components needs this to handle some final callbacks while the entity is still valid)
+		for (std::size_t i = m_componentBits.FindFirst(); i != m_componentBits.npos; i = m_componentBits.FindNext(i))
+			m_components[i]->OnEntityDestruction();
+
 		// We alert each system
 		for (std::size_t index = m_systemBits.FindFirst(); index != m_systemBits.npos; index = m_systemBits.FindNext(index))
 		{