public World ToImmutable()
{
if (!_anythingChanged)
{
return(_previousWorld);
}
foreach (long entityID in _addedEntities)
{
if (!_previousWorld._entities.ContainsKey(entityID))
{
var entity = _entities[entityID];
_entities.Remove(entityID);
var resultingEntity = _systemManager.Load(entity);
if (resultingEntity != null)
{
_entities.Add(entityID, resultingEntity);
}
}
}
foreach (Entity entity in _removedEntities)
{
_systemManager.Unload(entity);
}
return(new World(_entities.ToImmutable(), _systemManager));
}
protected override void UnloadContent()
{
_systemManager.Unload();
_gameScope.Dispose();
base.UnloadContent();
}