Method FindOrCreateArchetype

Engine/source/EtFramework/ECS/EcsController.cpp:531–566

-------------------------------------- EcsController::FindOrCreateArchetype Get the associated archetype or create a new one

// Get the associated archetype or create a new one
//
Archetype* EcsController::FindOrCreateArchetype(ComponentSignature const& sig, uint8 const layer)
{
	T_Hash const sigId = sig.GenId();

	// ensure we have an archetype container for the hierachy layer we are on
	while (m_HierachyLevels.size() <= static_cast<size_t>(layer))
	{
		m_HierachyLevels.emplace_back(ArchetypeContainer());
	}

	// find or create
	ArchetypeContainer& cont = m_HierachyLevels[layer];
	auto foundA = cont.archetypes.find(sigId);
	if (foundA == cont.archetypes.cend())
	{
		auto res = cont.archetypes.emplace(sigId, new Archetype(sig));
		ET_ASSERT(res.second == true);
		foundA = res.first;

		// upon creation, check if there are any systems that should iterate this archetype
		for (RegisteredSystem* const sys : m_Systems)
		{
			if (foundA->second->GetSignature().Contains(sys->signature))
			{
				while (sys->matchingArchetypes.size() <= static_cast<size_t>(layer)) // ensure we have enough layers
				{
					sys->matchingArchetypes.push_back(RegisteredSystem::ArchetypeLayer());
				}

				sys->matchingArchetypes[layer].archetypes.push_back(foundA->second);
			}
		}
	}

	return foundA->second;
}

//------------------------------
// EcsController::MoveArchetype