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Spottedleaf 7db3355205 Make region/lock shift accessors per world 
This has been done to ensure that the shifts are not used
until the world object is being constructed, which is before
the global configuration is initialised. There also isn't any
reason for these shifts to be global anyways.
 2023-12-30 15:45:24 -08:00
Spottedleaf abff96ed8d Make worldborder collisions consistent with Vanilla 
Vanilla now requires the use of WorldBorder#isInsideCloseToBorder
to consider a border collision
 2023-12-18 17:12:55 -08:00
Spottedleaf d597c4927a Fix incorrect border collision detection 
The epsilon used was in the opposite direction, which would cause
the getCollisions method to incorrectly return it for when players
were exactly on the border but not colliding. To bring it in-line
with the rest of the collision code, the collision must be into
the border by +EPSILON.

Fixes https://github.com/PaperMC/Paper/issues/9859
 2023-12-14 18:57:17 -08:00
Spottedleaf be034cd985 Initialise default nibble arrays in ChunkAccess directly 
When ChunkAccess was converted to an abstract class some versions
ago, the code to initialise nibble arrays should have been moved.
However, the code was not moved and so now mods constructing their
own implementations of ChunkAccess would not have the nibble arrays
initialised.

This is ported to Paper from Starlight to keep the code base in sync,
not because it fixes anything known.
 2023-10-16 18:57:45 -07:00
Spottedleaf b119425c8e Fix mushrooms not generating in swamps 
During feature generation, light data is not initialised and
will always return 15 in Starlight. Vanilla can possibly return
0 if partially initialised, which allows some mushroom blocks to
generate.

In general, the brightness value from the light engine should not
be used until the chunk is ready. To emulate Vanilla behavior better,
we return 0 as the brightness during world gen unless the target
chunk is finished lighting.

The regular light retrieval outside of WorldGenRegion remains
the same, as behaviorally chunks not lit should be at max
skylight and zero block light.
 2023-10-16 18:52:28 -07:00
Spottedleaf b6f04d399f Remove unused skyLightSources 
There is no point in initialising the sources in Starlight,
as we do not use them. Additionally, they are not saved to
disk so we do not need them.

Maintaining and initialising them is not a negligible cost,
which is why they are being removed.
 2023-10-16 18:49:41 -07:00
Spottedleaf ad8f4803d3 Make EntityLookup#get use read lock for entity maps 
On Folia, this map is modified by multiple threads and iterating
it may throw errors, for example using the /kill command or any
other command that uses an entity selector.
 2023-10-09 10:02:37 -07:00
Spottedleaf d7561e90f0 Properly call overloaded super onDisconnect 
Since the method is overloaded, the call to super (which is changed
to call the overloaded method) without the additional parameters
will result in recursion.
 2023-09-26 13:16:21 -07:00
Spottedleaf ec66a2c91c Fire PlayerConnectionCloseEvent for configuration packet listener 
If the player moves to the configuration stage, we also need
to fire the event.
 2023-09-26 09:20:17 -07:00
Spottedleaf 68e28c6750 Fix VoxelShape#isFullBlock() for non-single AABB types 
The correct logic to implement NOT_SAME with Shapes#block()
is to test whether any shape data exists outside of [0.0, 1.0]
and to test whether the shape is completely filled from 0.0 to 1.0
on all axis. This can be implemented by checking whether the
bounds represent the full block and whether everything within
the bounds is filled.
 2023-09-26 09:16:11 -07:00
Spottedleaf 63a40050bd Re-add remove streams for Brain AI patch 2023-09-23 23:38:51 -07:00
Spottedleaf 0ef267f0e7 Optimise nearby player retrieval 
Instead of searching/testing every player online on the server,
we can instead use the nearby player tracking system to reduce
the number of tests per search.
 2023-09-23 23:16:45 -07:00
Spottedleaf 7834ec5bcc Fix race condition on UpgradeData.BlockFixers class init 
The CHUNKY_FIXERS field is modified during the constructors
of the BlockFixers, but the code that uses CHUNKY_FIXERS does
not properly ensure that BlockFixers has been initialised before
using it, leading to a possible race condition where instances of
BlockFixers are accessed before they have initialised correctly.

We can force the class to initialise fully before accessing the
field by calling any method on the class, and for convenience
we use values().
 2023-09-23 22:15:09 -07:00
Spottedleaf 0e092b4f36 Add lag compensation for breaking blocks 2023-09-23 22:10:40 -07:00
Spottedleaf a20286c5a8 Optimise chunk tick iteration 
When per-player mob spawning is enabled we do not need to randomly
shuffle the chunk list. Additionally, we can use the NearbyPlayers
class to quickly retrieve nearby players instead of possible
searching all players on the server.
 2023-09-23 21:43:10 -07:00
Spottedleaf 7a108cda40 Make sure to maintain the players sent to set for ChunkHolder 
Required for proper block/light updates to clients
 2023-09-22 17:07:02 -07:00
Spottedleaf 15183b44de Port patches from folia dev/optimisations 2023-09-22 15:54:36 -07:00
Spottedleaf 52a9b1c91e Fix recursion with pathfind entity event 
With the function overload, need to pass the entity
through to the super call
 2023-09-22 15:38:31 -07:00
Spottedleaf 1efbbb3ef9 Add some patches, fix compile 2023-09-22 15:33:14 -07:00
Spottedleaf 9bf842c13e Chunk system patch 2023-09-22 13:13:57 -07:00
Spottedleaf d3a6b1376a Optimise multiple block updates occurring in the same chunk 
We can avoid multiple ticket additions for the same ChunkTasks
instance. This will help in situations where significant number of
block updates occur for the same chunk in the same tick, such as
water draining.
 2023-09-11 07:15:18 -07:00
Spottedleaf 7843c4c1f1 Remove UpgradeData neighbour ticks outside of range 
The lists are only supposed to contain ticks for the 1 radius
neighbours of the chunk.
 2023-08-09 14:05:57 -07:00
Spottedleaf aa3e3b9b14 Prevent entity removals if the entity slices is receiving status updates 
If an entity is removed while updating an entity slice, then the
iteration over the entity slice's entities could throw a cryptic
exception. Instead, it is better to prevent the entity removal
with a useful log message.

Fixes https://github.com/PaperMC/Paper/issues/9464
 2023-07-25 07:11:58 -07:00
Spottedleaf 40e354e38e Optimize player lookups for beacons 
For larger ranges, it's better to iterate over the player list
than the entity slices.
 2023-07-06 20:18:33 -07:00
Spottedleaf c0d376e242 Copy itemstack when sanitizing for datawatcher items 
Since the packet is broadcasted for players, it means that
the packet will be sent to multiple players. In this case,
modifying the data results in a possible race condition
where a CME may occur as the packet will be serialized on
many different netty IO threads.
 2023-06-16 10:27:59 -07:00
Spottedleaf cffc14631b Make sure to post process chunks before they are sent to players 
Some TEs need to be post processed after generation to be sent
properly (chests)
 2023-06-16 10:24:51 -07:00
Spottedleaf 3cfd74da9e Fix IntegerUtil#getDivisorNumbers 
Use unsigned mod operation for initialization of anc

Also includes
- https://github.com/PaperMC/DataConverter/commit/5a0cefb45e246ef36901fb62448571edd82e7296
- https://github.com/PaperMC/Starlight/commit/acc8ed9634bbe27ec68e8842e420948bfa9707e7
 2023-06-16 09:05:36 -07:00
Spottedleaf f85410d12b Fix incorrect collision shape for hopper item suck 
It shouldn't cost too much more to check the correct shape,
provided that it is cached and we use the overall AABB
to collect possible entities to check against.

The issues with the old check code is that it will use two
getEntitiesOfClass calls plus the addition of streams
_and_ the toAabbs() logic on VoxelShape. The new code
caches toAabbs, uses one getEntitiesOfClass call, and
does not use streams. Then compared to 1.12, we are
only performing two additional AABB checks per item.
 2023-06-10 13:42:03 -07:00
Spottedleaf 3fe23c1679 Allow double removal from player chunk loader 
Unlike Folia, players may be incorrectly be double-removed

Fixes https://github.com/PaperMC/Paper/issues/9299
 2023-06-10 08:27:23 -07:00
Spottedleaf 65db359354 Fix crash relating to "Already sent chunk" 
Forgot to update the distandce field in the single user area map
on update, and additionally used the wrong radius (introduced
last commit) for the broadcast map
 2023-06-08 18:00:46 -07:00
Spottedleaf 8c4fdb4e79 Fix inconsistent chunk sending with vanilla 
Vanilla now loads the proper number of chunks for sending
to players. So, we can finally match their behavior after
all these years.
 2023-06-08 17:43:05 -07:00
Spottedleaf 20f6705a20 Updated Upstream (CraftBukkit/Spigot) 
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

CraftBukkit Changes:
fd92f1e65 SPIGOT-7378: Add BlockDropItemEvent for Suspicious Sand & Gravel drops
cb1b69d13 SPIGOT-7377: Server sends player list twice

Spigot Changes:
16cfc987 Rebuild patches
 2023-06-08 16:47:58 -07:00
Spottedleaf 5c8d49542f Fix boot errors 
Thanks kennytv
 2023-06-08 16:44:17 -07:00
Spottedleaf c7006765bd Fix final compilation issues 2023-06-08 16:35:02 -07:00
Spottedleaf 494b03ea47 Apply last patch 2023-06-08 16:21:20 -07:00
Spottedleaf cadfd892c9 Add in some patches 2023-06-08 16:12:34 -07:00
Spottedleaf e031042af5 Finish updating chunk system patch 
Add in locking changes from folia, plus fix some diffs.
I'm sure it'll be error-free.
 2023-06-08 16:04:53 -07:00
Spottedleaf d663d10f08 Rebase chunk patches 2023-06-07 22:25:38 -07:00
Spottedleaf 288a08c1af rewrite chunk system checkpoint 2023-06-07 22:21:04 -07:00
Spottedleaf 977dc40767 Clean rebuild 
Add to gradle build so that this is automatically done
throughout the update
 2023-06-07 22:03:07 -07:00
Spottedleaf b2002c14fa Pull a few Folia patches 2023-05-27 20:34:33 +02:00
Spottedleaf f2b889e651 Break redstone on top of trap doors early 
This logic hooks into the neighbour update which should be invoked
as a result of redstone powering the trap door.
 2023-05-01 18:32:30 -07:00
Spottedleaf 1e44e31be7 Add dirty flag to chunk tick lists 
For whatever reason, vanilla does not mark the chunk as
dirty when changing its tick lists.

We also have it return dirty if the time since the last
save has changed, since it would affect the tick offsets
in the ticklist.
 2022-10-24 19:48:19 -07:00
Spottedleaf 11bb97e66c Fix incorrect handling of mustNotSave 
CB used the dirty flag to construct the chunk unload event,
but then sets mustNotSave to the inverted value of the event
after calling the event without considering that the chunk may
actually be brought up to loaded status again later. Then, CB
overrides the isUnsaved method of LevelChunk to additionally
use mustNotSave.

Thus, if the chunk is not marked dirty when unloading, the
mustNotSave value will be set to true. Then, once the chunk
is reloaded and edited the dirty flag will be set. However,
when unloading the chunk finally, the isUnsaved method
will return false due to mustNotSave being true. Thus, the
chunk will never be saved.

To fix these issues, no longer make mustNotSave override
isUnsaved and always set the save flag for the chunk unload
event.

This issue started popping up recently due to the recent
change to mark chunks as not dirty after saving them, which
increased the chance of the save issue occurring in the first
place.
 2022-10-24 19:23:46 -07:00
Spottedleaf 0aa7d1a07f Mark chunks as saved after saving them 
Prevents re-saving them again later.
 2022-10-23 09:09:18 -07:00
Spottedleaf 03245caed0 Fix inconsistent isChunkLoaded calls 
When we update the chunk state to border, it should be
the case that isChunkLoaded returns true and that
getChunkIfLoadedImmediately returns a non-null value.
Now add the chunk to the loaded map before making any
callbacks after updating to border state.
 2022-10-18 08:11:23 -07:00
Spottedleaf 3acabf7aa9 Do not log throwable for duplicate entity adds 2022-09-29 08:53:33 -07:00
Spottedleaf 0f1a8717e8 Rewrite chunk system (#8177) 
Patch documentation to come

Issues with the old system that are fixed now:
- World generation does not scale with cpu cores effectively.
- Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps.
- Unreliable prioritisation of chunk gen/load calls that block the main thread.
- Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved.
- Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal.
- Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles.

The above list is not complete. The patch documentation will complete it.

New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil.

Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft.

The old legacy chunk system patches have been moved to the removed folder in case we need them again.
 2022-09-26 01:02:51 -07:00
Spottedleaf a2df674cc0 Re-add legacy getChunkAtAsynchronously to ChunkProviderServer 
Apparently some plugins use it
 2022-09-02 04:41:08 -07:00
Spottedleaf 0ee53db50a Fix World#refreshChunk not working for chunks in no-tick range 
The chunk would not be marked as ticking in this case, so
retrieving the ticking chunk would not work.
 2022-09-01 15:39:24 -07:00
SpottedleafandSpottedleaf 90da9124c5 Re-arrange most chunk system patches to front (#8338) 
* Re-arrange most chunk system patches to front

Co-authored-by: Spottedleaf <Spottedleaf@users.noreply.github.com>
 2022-09-01 09:51:59 -07:00
Spottedleaf 61a8488806 Ensure players are removed from pendingLogin 
Looks like they would not have been removed if they disconnected
during the chunk load, preventing the world from being unloaded.
 2022-08-29 06:21:45 -07:00
Spottedleaf 9760e8f86a Prevent unloading worlds with pending player logins 
Logging into an unloaded world isn't going to end well.
This may fix the cases of people seeing errors about regionfiles
being closed, as loading chunks in an unloaded world will cause this
as the regionfile cache is closed but not cleared.
 2022-08-26 21:56:55 -07:00
Spottedleaf e48774fd72 Simple patch changes for chunk system 
Major ones soon
 2022-08-10 08:07:49 -07:00
Spottedleaf d1d02c9237 Add async catcher to PlayerConnection internalTeleport 2022-08-03 12:59:54 -07:00
Spottedleaf 8d19ec3f2b Do not sync load chunk for dynamic game event listener registration 
These can be called while an entity is being added to the world,
and if the entity is being added from a chunk load context the
sync load will block indefinitely (because the chunk load context
is for completing the chunk to FULL).

This does raise questions about the current system for these
dynamic registrations, as it looks like there is _zero_ logic
to account for the case where the chunk is _not_ currently loaded
and then later loaded.
 2022-07-03 22:42:58 -07:00
Spottedleaf 0ad5dc6e60 Do not use worldgen executor for api profile completions 
We cannot put blocking network I/O onto the worldgen threads,
this will crash the server if it stalls
 2022-07-03 14:55:56 -07:00
Spottedleaf 4c6e227360 Sync Starlight SaveUtil with 1.1.1 
Code isn't used, but still should be synced
 2022-06-18 14:48:08 -07:00
Spottedleaf 26325213c7 Fix keep spawn loaded patch 
Needs to be in blocks
 2022-06-11 07:58:17 -07:00
Spottedleaf dca4b90844 Don't explode on light data in the nether 
It shouldn't be there but whatever
 2022-06-11 07:28:18 -07:00
Spottedleaf 1c4ca26d6e Make starlight light read non-fatal if it throws 
Brings behavior in line with the mod, we shouldn't kill the chunk
if the light data is corrupt, we can regenerate the light data
 2022-06-10 21:08:37 -07:00
Spottedleaf 91cf4f0392 Correct dataconverter diff 
Missed renames + game event listener walker stuff
 2022-06-10 20:54:05 -07:00
Spottedleaf ac0e1997ee <3 jmp 2022-06-07 21:06:41 -07:00
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Spottedleaf 348d5f3dca i really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really 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Spottedleaf dc953ea414 i really really really really really really really really really really really really really really really really really really really really really really really really really really really really really really love jmp 2022-06-07 18:31:24 -07:00
Spottedleaf f8d0fdf127 i love jmp 2022-06-07 17:42:07 -07:00
Spottedleaf e83c74a0a0 hate jmp and his gradle 2022-06-07 17:15:06 -07:00
Spottedleaf 4aa035fa95 Do not accept invalid client settings 2022-05-07 14:59:20 -07:00
Spottedleaf af019e9d32 Only log for passenger / vehicle world mismatch 
Exception thrown may corrupt passenger/vehicle state
 2022-05-07 08:48:29 -07:00
Spottedleaf a096540d94 Add per player chunk loading limits 
Configurable under "settings.chunk-loading.player-max-chunk-load-rate",
defaults to -1. This commit also changes the chunk loading to be
distributed equally for all players, rather than distance based. This is
to ensure players flying around do not take priority over everyone else.
The exception to this new rule is the min-load-radius, which still has
priority over everything else.
 2022-03-31 06:04:23 -07:00
Spottedleaf cbdfcf8338 Use correct toX/Y/Z in player move packet handling 2022-03-14 12:28:02 -07:00
Spottedleaf 35cc32c4a1 Fix swamp hut cat generation deadlock 
The worldgen thread will attempt to get structure references
via the world's getChunkAt method, which is fine if the gen is
not cancelled - but if the chunk was unloaded, the call will block
indefinitely. Instead of using the world state, we use the already
supplied generatoraccess which will always have the chunk available.

Missed patch from tuinity merge
 2022-03-12 06:32:31 -08:00
Spottedleaf ffe0d7b99c Add more to the save fixes 
- Set forceTicks to true, so that player packets are always
  processed so that the main process queue can be drained
 2022-03-05 17:36:57 -08:00
Spottedleaf 01b6bc66db Fix save problems on shutdown 
- Save level.dat first, in case the shutdown is killed later
- Force run minecraftserver tasks and the chunk source tasks
  while waiting for the chunk system to empty, as there's simply
  too much trash that could prevent them from executing during
  the chunk source tick (i.e "time left in tick" logic).
 2022-03-05 17:29:47 -08:00
Spottedleaf c232bf0419 Add missing glow_item_frame walkers 
Needs one for ItemStack and Entity. It looks like I missed
the entity one because Mojang defined it as being simple,
which it certainly isn't (they "missed" it too).
 2022-03-04 20:57:59 -08:00
Spottedleaf 13a4b2f382 Fix unload stall 
Also added required tickets that should not be removed during
shutdown
 2022-02-28 18:33:20 -08:00
Spottedleaf 568435b5fa Add DataConverter to StructureCheck, for structure lookups 
Mojang added a partial conversion here to quickly check for
structures, which bypasses the chunk system. So we need a
hook here.
 2022-02-25 08:46:35 -08:00
Spottedleaf 9489572907 Execute mid tick tasks during tile entity ticking 
It was never done here in the past since the old TE management
system was barely functional, and could not handle chunk loading
remotely well
 2022-02-22 14:42:00 -08:00
Spottedleaf 172adf699b Put world into worldlist before initing the world 
Some parts of legacy conversion will need the overworld
to get the legacy structure data storage
 2022-02-22 14:28:34 -08:00
Spottedleaf 64011e201b Add mid-tick task execution to block ticking 
Dropped from the ticking block list rewrite
 2022-02-22 14:24:28 -08:00
Spottedleaf 722983fbc7 1.18 misc performance dev branch (#7368) 
- Port player chunk loader patch
Makes the chunk system act as it did in 1.17, no additional tickets (and thus logic) to make a chunk ticking.
Adds simulation distance API, deprecates old no-tick method.
- More collision optimisations
Ancient patch from tuinity that never could be pushed to master.
- Fix Optimise ArraySetSorted#removeIf patch
- Execute chunk tasks fairly for worlds while waiting for next tick
- Port Replace ticket level propagator
 2022-02-18 09:44:46 -08:00
Spottedleaf 950afc93da Use correct headerLocation for regionfile initialisation 
If the regionfile cannot be recalculated (i.e entity/poi type),
then attempts to remove the invalid entry would blow up
 2022-02-02 06:02:16 -08:00
Spottedleaf 9dd2c32156 Merge chunk task urgent executor thread into the worker queue 
By keeping them separate, urgent tasks could not be executed
by the worker queue.
 2022-01-07 15:08:34 -08:00
Spottedleaf b8de21cf48 Fix incorrect old oversized chunk data merging 
All legacy oversized chunks were created before the new
chunk format, so don't try to merge into the new format.
 2022-01-07 13:49:39 -08:00
Spottedleaf 56420b0abd Allow . in usernames 2022-01-01 11:50:44 -08:00
Spottedleaf 545d476be4 Validate usernames 2022-01-01 05:48:17 -08:00
Spottedleaf c885b21024 Correctly parse last update for old chunks for regionfile recalc 
It's required so that comparisons between two chunks can be
made
 2021-12-27 13:35:09 -08:00
Spottedleaf 2ecc06a8fb Defensively copy chunk data in upgradeChunkTag 
The data provided is always from the regionfile thread, which
does not copy the data out. So if two separate calls need
the data, then there's going to be a problem.
 2021-12-27 04:11:21 -08:00
Spottedleaf a08630ed35 Only write chunk data to disk if it serializes without throwing 
This ensures at least a valid version of the chunk exists
on disk, even if outdated
 2021-12-19 09:15:22 -08:00
Spottedleaf a5872264a3 Create sections for chunk conversion if non-existant 
Required to add in the new biome sections
 2021-12-18 01:04:00 -08:00
Spottedleaf 1deca8eab9 Add missing return when datafixers fail for chunk conversion 
Caused the chunk to be later deserialized, which would
result in spamming unrelated errors (possibly) +
double chunk completion.
 2021-12-17 06:55:16 -08:00
Spottedleaf 8671893fb5 Bounds check biomes length before using. 
Missed the diff by Mojang that added this, apparently some
ancient code created zero-length biomes.
 2021-12-17 06:38:18 -08:00
Spottedleaf 16d11b8180 Return 0 for light values if a dimenion does not have them 
Fixes https://github.com/PaperMC/Starlight/issues/99
 2021-12-08 22:01:02 -08:00
Spottedleaf 3bf392595d Fix bad ticking checks for blocks 
Caused blocks to tick outside of simulation distance
 2021-12-08 22:00:45 -08:00
Spottedleaf 1dc66f14fb Add Starlight 2021-11-27 02:42:09 -08:00
Spottedleaf 32f6f4a8cd Async catch modifications to critical entity state 
These used to be here from Spigot, but were dropped with 1.17.
Now in 1.17, this state is _even more_ critical than it was before,
so these must exist to catch stupid plugins.
 2021-10-31 21:35:47 -07:00
Spottedleaf 0339e8a094 Do not overload I/O threads with chunk data while flush saving 
If the chunk count is high, then the memory used by the
chunks adds up and could cause problems. By flushing
every so many chunks, the server will not become
stressed for memory. It will also not increase the total
time to save, as flush saving performs a full flush at
the end anyways.
 2021-10-16 02:22:11 -07:00
Spottedleaf 9ba1f65d29 Fix off by one for determining server view distance 
It was 1 greater than it should've been. lvar renaming
caused the field viewDistance to be read when it should've
been reading the watchDistance
 2021-10-15 19:20:32 -07:00
Spottedleaf 55ca8ebefe Null check isApplicable for CraftBlockEntityState#update 
If the update call removed the TE, then isApplicable would
have NPE'd.
 2021-10-12 13:35:29 -07:00