Since the update to Minecraft 1.9.4 chunks were actually never loaded
asynchronously because a sync request was always made from the
PlayerChunkMap shortly after the chunk had been queued.
- PlayerChunkMapEntry now only loads chunks synchronously *after* the
chunk failed to load asynchronously.
- Fixed some minor bugs that caused "Attempted to dequeue chunk" messages
- Simplified ChunkProviderServer patch. loadChunk no longer generates chunks,
so there is no need to handle that.
- Moved loader and provider to ChunkIOProvider so there is no need for
"hashCode abuse"
Major things to note:
Class renames: https://gist.github.com/LexManos/44dd211f90f498ad4015279b103dff86
Tile Entities are now packed in the ChunkData packet.
Forge intends to work around this to better support large moded worlds, but for the time being modders should implement the new function carefully and only send what data they need to!
Minecraft's codebase now has annotations, these are directly from Mojang and should be adheared to!
Added support for package-info.java's containing @Nullable information for all MC code base.
Some notes:
Almost all int x, int y, int z parameters have been changed to BlockPos class
ForgeDirection has been removed, replaced by net.minecraft.util.EnumFacing.
All FML classes have moved from packet cpw.mods.fml to net.minecraftforge.fml
Fluid Rendering has been disabled for the time being, to be re-evaulated and a test mod created for it.
Minecraft now uses a Model based system for rendering blocks and Items. The intention is to expand the model format to better suit modder's needed once it is evaulated.
As such, The model loaders from Forge have been removed, to be replaced by expanding vanilla's model format.
Metadata has been extracted out in Minecraft to IBlockState, which holds a list of properties instead of magic number metadata. DO NOT listen to the fearmongering, you can do EVERYTHING with block states you could previously with metadata.
Stencil Bits are disabled entirely by for the main Display, Modders must enable and recreate the FrameBuffer if they wish to use Stencil Bits.
When a chunk fails to load async, we fallback to the original sync method.
In this case, it was calling the async method twice which ended up causing
a stackoverflow.
When a player triggers a chunk load via walking around or teleporting
there is no need to stop everything and get this chunk on the main thread.
The client is used to having to wait some time for this chunk and the
server doesn't immediately do anything with it except send it to the
player. At the same time chunk loading is the last major source of file IO
that still runs on the main thread.
These two facts make it possible to offload chunks loaded for this reason
to another thread. However, not all parts of chunk loading can happen off
the main thread. For this we use the new AsynchronousExecutor system to
split chunk loading in to three pieces. The first is loading data from
disk, decompressing it, and parsing it in to an NBT structure. The second
piece is creating entities and tile entities in the chunk and adding them
to the world, this is still done on the main thread. The third piece is
informing everyone who requested a chunk load that the load is finished.
For this we register callbacks and then run them on the main thread once
the previous two stages are finished.
There are still cases where a chunk is needed immediately and these will
still trigger chunk loading entirely on the main thread. The most obvious
case is plugins using the API to request a chunk load. We also must load
the chunk immediately when something in the world tries to access it. In
these cases we ignore any possibly pending or in progress chunk loading
that is happening asynchronously as we will have the chunk loaded by the
time they are finished.
The hope is that overall this system will result in less CPU time and
pauses due to blocking file IO on the main thread thus giving more
consistent performance. Testing so far has shown that this also speeds up
chunk loading client side although some of this is likely to be because
we are sending less chunks at once for the client to process.
Thanks for ammaraskar for help with the implementation of this feature.
This commit is based off the following :
Bukkit/CraftBukkit@b8fc6ab2c1Bukkit/CraftBukkit@85f5776df2Bukkit/CraftBukkit@0714971ca2Bukkit/CraftBukkit@7f49722f45Bukkit/CraftBukkit@53ad0cf1ab
cpw