this was causing TNT and falling blocks to briefly appear half a block lower than their true position, because their positions are measured from the center and not the base.
this command dumps a human-readable version of pmmp/mapping palette mapping files to a .txt file.
may be useful for debugging issues with the schema generator or the upgrade process.
there's no technical reason not to support this, since it doesn't violate any assumptions and the type returned is a base anyway.
this enables implementing stuff like snow cauldrons in a plugin, which previously would require reflection due to the minecraft:cauldron deserializer being registered already.
it also enables overriding IDs to map to custom blocks, which might be useful for overriding some functionality (although this is inadvisable - and won't alter the usage of stuff like VanillaBlocks::WHATEVER()).
we do *not* allow overriding serializers, since type IDs are expected to be paired to block implementations, and allowing them to be reassigned could lead to crashes if the new class was incorrect. So the correct approach for overriding nether portals would be to create a custom type ID as if you were adding a fully custom item. This will also allow other plugins to distinguish between your implementation and the built-in one.
This PR significantly improves performance of entity movement calculation.
Previous attempts to optimise this were ineffective, as they used a cache to mitigate the cost of recomputing AABBs. Entities tend to move around randomly, so the non-cached pathway really needed to be optimized.
This change improves performance on multiple fronts:
1) avoiding Block allocations for blocks with 1x1x1 AABBs and with no AABBs (the most common)
2) avoiding Block allocations and overlapping intersection checks unless a stateID is specifically known to potentially exceed its cell boundaries (like fences)
3) avoiding overlapping AABB checks when overlaps can't make any difference anyway (cubes)
Together, these changes improve the performance of World->getBlockCollisionBoxes() by a factor of 5. In real-world terms, this shows up as a major performance improvement in situations with lots of entities moving in random directions. Testing with item entities showed an increase from 400 to 1200 moving items with the same CPU usage.
This change is built on the assumption that `Block->recalculateCollisionBoxes()` and its overrides don't interact with any world. This is technically possible due to the crappy design of the `Block` architecture, but should be avoided. As a world is not available during `RuntimeBlockStateRegistry` initialization, attempting to interact with a world during `recalculateCollisionBoxes()` will now cause a crash.
This turned out to be a problem for `ChorusPlant`, which was fixed by 70fb9bbdfd06c7eda00b4cd2c2c3840755e6b8f6. The correct solution in this case was to use dynamic states similar to how we currently deal with fence connections.
