public static void Initialize(string worldName, bool editorWorld)
{
PlayerLoopManager.RegisterDomainUnload(DomainUnloadShutdown, 10000);
var world = new World(worldName);
World.Active = world;
var systems = GetAllSystems(WorldSystemFilterFlags.Default);
if (systems == null)
{
world.Dispose();
if (World.Active == world)
{
World.Active = null;
}
return;
}
// create presentation system and simulation system
InitializationSystemGroup initializationSystemGroup = world.GetOrCreateSystem <InitializationSystemGroup>();
SimulationSystemGroup simulationSystemGroup = world.GetOrCreateSystem <SimulationSystemGroup>();
PresentationSystemGroup presentationSystemGroup = world.GetOrCreateSystem <PresentationSystemGroup>();
// Add systems to their groups, based on the [UpdateInGroup] attribute.
foreach (var type in systems)
{
// Skip the built-in root-level systems
if (type == typeof(InitializationSystemGroup) ||
type == typeof(SimulationSystemGroup) ||
type == typeof(PresentationSystemGroup))
{
continue;
}
if (editorWorld)
{
if (Attribute.IsDefined(type, typeof(ExecuteInEditMode)))
{
Debug.LogError(
$"{type} is decorated with {typeof(ExecuteInEditMode)}. Support for this attribute will be deprecated. Please use {typeof(ExecuteAlways)} instead.");
}
if (!Attribute.IsDefined(type, typeof(ExecuteAlways)))
{
continue;
}
}
var groups = type.GetCustomAttributes(typeof(UpdateInGroupAttribute), true);
if (groups.Length == 0)
{
simulationSystemGroup.AddSystemToUpdateList(GetOrCreateManagerAndLogException(world, type) as ComponentSystemBase);
}
foreach (var g in groups)
{
var group = g as UpdateInGroupAttribute;
if (group == null)
{
continue;
}
if (!(typeof(ComponentSystemGroup)).IsAssignableFrom(group.GroupType))
{
Debug.LogError($"Invalid [UpdateInGroup] attribute for {type}: {group.GroupType} must be derived from ComponentSystemGroup.");
continue;
}
var groupMgr = GetOrCreateManagerAndLogException(world, group.GroupType);
if (groupMgr == null)
{
Debug.LogWarning(
$"Skipping creation of {type} due to errors creating the group {group.GroupType}. Fix these errors before continuing.");
continue;
}
var groupSys = groupMgr as ComponentSystemGroup;
if (groupSys != null)
{
groupSys.AddSystemToUpdateList(GetOrCreateManagerAndLogException(world, type) as ComponentSystemBase);
}
}
}
// Update player loop
initializationSystemGroup.SortSystemUpdateList();
simulationSystemGroup.SortSystemUpdateList();
presentationSystemGroup.SortSystemUpdateList();
ScriptBehaviourUpdateOrder.UpdatePlayerLoop(world);
}
