Method Update

SDK/src/NDK/World.cpp:166–241

	*/

	void World::Update()
	{
		if (!m_orderedSystemsUpdated)
			ReorderSystems();

		// Move waiting entities to entity list
		if (!m_waitingEntities.empty())
		{
			constexpr std::size_t MinEntityCapacity = 10; //< We want to be able to grow maximum entity count by at least ten without going to the waiting list

			m_entities.reserve(m_entities.size() + m_waitingEntities.size() + MinEntityCapacity);
			for (auto& blockPtr : m_waitingEntities)
				m_entities.push_back(std::move(*blockPtr));

			m_waitingEntities.clear();

			// Update entity blocks pointers
			for (std::size_t i = 0; i < m_entities.size(); ++i)
				m_entityBlocks[i] = &m_entities[i];
		}

		// Handle killed entities before last call
		for (std::size_t i = m_killedEntities.FindFirst(); i != m_killedEntities.npos; i = m_killedEntities.FindNext(i))
		{
			NazaraAssert(i < m_entityBlocks.size(), "Entity index out of range");

			Entity* entity = &m_entityBlocks[i]->entity;

			// Destruction of the entity (invalidation of handle by the same way)
			entity->Destroy();

			// Send back the identifier of the entity to the free queue
			m_freeIdList.push_back(entity->GetId());
		}
		m_killedEntities.Reset();

		// Handle of entities which need an update from the systems
		for (std::size_t i = m_dirtyEntities.FindFirst(); i != m_dirtyEntities.npos; i = m_dirtyEntities.FindNext(i))
		{
			NazaraAssert(i < m_entityBlocks.size(), "Entity index out of range");

			Entity* entity = &m_entityBlocks[i]->entity;

			// Check entity validity (as it could have been reported as dirty and killed during the same iteration)
			if (!entity->IsValid())
				continue;

			Nz::Bitset<>& removedComponents = entity->GetRemovedComponentBits();
			for (std::size_t j = removedComponents.FindFirst(); j != m_dirtyEntities.npos; j = removedComponents.FindNext(j))
				entity->DestroyComponent(static_cast<Ndk::ComponentIndex>(j));
			removedComponents.Reset();

			for (auto& system : m_orderedSystems)
			{
				// Is our entity already part of this system?
				bool partOfSystem = system->HasEntity(entity);

				// Should it be part of it?