this could happen if a plugin calls setPopulated(true) on a chunk after a request for its population landed in the queue, but before it actually got processed. In that case, the promise would never get fulfilled.
this does not indicate a failure; it indicates that the chunk has already been successfully populated.
In this case, we shouldn't be putting the task back on the queue.
This is skirting around the real bug, which is that requestChunkPopulation() doesn't check if the target chunk is already populated before it creates a new promise that it will be.
this allows chunks locked for population to be modified. If the PopulationTask detects that the chunk was modified during the onCompletion(), the result of the population will be discarded and rescheduled, so that it includes user modifications.
tiles may be deleted in the following circumstances:
1) the target block in the new chunk doesn't expect a tile
2) the target block in the new chunk expects a different type of tile (responsibility of the plugin developer to create the new tile)
3) there's already a tile in the target chunk which conflicts with the old one
In all other cases, the tile will be transferred.
This resolves a large number of unintentional bugs caused by world editors replacing chunks without setting the deleteTilesAndEntities parameter to false (even the core itself does it).
closes#4520
entities exist completely independently from chunks now, so there is no need to interact with them whatsoever.
As I wrote in #4520, there's no sense in deleting entities here, since a chunk replacement is essentially just a mass block update.
On that theme, it might be a good idea to call Entity->onNearbyBlockChange() for all entities in the target and adjacent chunks when replacing a chunk, to ensure that they get the proper movement updates.
isChunkGenerated() merely checks if the chunk can be loaded from disk, if it's not in the runtime cache already.
This is pointless in all of these cases, because the check is prefaced by an isChunkLoaded() check, which already limits the possibility anyway. If the chunk is not generated, it'll also be considered not loaded.
this raises false-positives during shutdown if players were online.
The fact that the player entity leans on the World to clean up after it is slightly problematic, but I'm not sure what else to do about it for now.
this allows entities to exist outside of generated chunks, with one caveat: they won't be saved in such cases.
Obviously, for player entities, this doesn't matter.
fixes#3947
this fixes 2 problems:
1) Blocks which set themselves to something else during onNearbyBlockChange() would not receive any block update
2) A memory leak when blocks in unloaded chunks were scheduled for an update.
I'm a little uneasy about this change, because there must have been some reason why I put this at the end of the block and not at the start, but whatever it is, I can't reason about it, and there's reasons not to put it at the end too.
the only reason to use getCollidingEntities() instead of getNearbyEntities() is if you have an entity that may or may not be collidable depending on certain conditions.
Really, I don't think this logic belongs in World at all, but for now it has to stay, because some other stuff depends on it.
these two methods are very misleadingly named, but they do almost exactly the same thing - the only difference is that getCollidingEntities() does a couple of additional checks.
instead, just ungate this and allow the provider to decide what to do.
Any chunk that contains entities or tiles is already always considered dirty, so the only thing the flags are good for is flagging chunks that previously had tiles and/or entities but no longer do.
In those cases, it's just removing keys from LevelDB anyway, so it's already very cheap.
Avoiding these redundant deletions is not worth the extra complexity and fragility of relying on flags to track this stuff.
this makes translation usage much more statically analysable.
The only places this isn't used are:
- places that prefix translations with colours (those are still a problem)
- places where server/client translations don't match (e.g. gameMode.changed accepts different parameters in vanilla than in PM)
the intent of these hacks was to break cyclic references to avoid having objects lingering in memory. However, all of the stuff that's being removed in this commit no longer has any effect anyway, due to the fact that these things don't circularly reference each other anymore. Notably, Tile inventories now keep Position instead of a Tile ref.
this makes more sense overall from a reader's perspective.
and also provide a rug-jerk for any idiots using World->close() when they aren't supposed to? ....
