Client block transformer

[RecursivePineapple]

This adds a mechanism for modifying the blocks sent to the client. This is needed for situations where you want to show one block/meta to the player, while storing another on the server. While this doesn't entirely belong in NEID, it is tightly coupled to NEID's internals and it has several mixin conflicts with the NEID packet mixins. It isn't viable to move this to another mod.

Code changes:

• Add the interface and registry (the registry is undocumented, but the interface should be 100% documented)
• Intercept packet S23, which is sent when the player right clicks a block
• Intercept packet S22, which is sent when 2-64 blocks change in a chunk
• Intercept packets S21 and S26 (via the chunk data extractor method), which are sent when chunks significantly change or are loaded

Testing done:

• Make a transformer that converts all sand to red sand
• Make a transformer that converts sand to red sand when (x + y + z) % 2 == 0
• Create a new default world and make sure the conversion works
• Create a superflat world that consists of ~6 layers of sand (no structures), turn off mobs, and profile it while flying around (https://spark.lucko.me/eZ8SVcHV99 - I can't even find the code on here)
• Test it in the full pack in SP (sand change only)
• Integrate it with GT coils
• Test on MP (in GT5u):
  • Make an EBF and turn it on
  • Relog within its chunk
  • Use MM to change more than 64 blocks at once in its chunk
  • With a small render distance and while the EBF is on, move a few chunks away so that it unloads and move back
  • Do the same, but relog while outside of its range
  • Chunkload the EBF and leave+enter its range

[mitchej123]

Has this been tested on both SP + MP?

[RecursivePineapple]

No, I forgot to test it before I put up the PR, but I did test it in the full pack

[mitchej123]

SP and MP behave differently when it comes to packets.

[Dream-Master]

i not add it to nightlies yet but will do after test

[RecursivePineapple]

It works fine on MP, I'll update the PR with everything I tested