public EntitiesUpdate GetWorldUpdate(string playerId, double updateTime)
{
if (_toAdd.Any() || _toRemove.Any())
{
return(null);
}
var player = _entities[playerId];
var visible = FindVisible(player).ToDictionary(e => e.Id);
var prevVisible = _visible.GetOrAdd(playerId, id => new HashSet <string>());
var removed = prevVisible.Except(visible.Keys).ToList();
var added = visible.Keys.Except(prevVisible).ToList();
var notChanged = visible.Keys.Intersect(prevVisible);
if (removed.Any() || added.Any())
{
_visible[playerId] = new HashSet <string>(visible.Keys);
}
var updated = notChanged
.Select(id => _entities[id]).Where(e => e.Updated > updateTime)
.Concat(added.Select(id => _entities[id]))
.ToList();
if (!updated.Any() && !removed.Any())
{
return(null);
}
var update = new EntitiesUpdate
{
Updated = updated,
Removed = removed
};
return(update);
}
public void FireEntitiesUpdate()
{
EntitiesUpdate?.Invoke();
}
