this used to be necessary to trigger subchunk creation so that light arrays would be available for use. With 02ff8d671b93ec5911576643e9b03f2049f31c81, this is no longer necessary.
recalculateHeightMapColumn is stateless, so it can't make any assumptions about which subchunks to check for blocks. However, in most the average case (6 allocated subchunks), this causes 2500+ useless SubChunk->getHighestBlockAt() calls (10 per column). Since we're calculating in bulk, we can figure out which subchunks are empty one time and ignore them for all 256 columns.
In the average case, this produced a 50-60% performance improvement for heightmap calculation (~1.1 ms -> 0.5 ms).
In extreme cases where the height is extremely varied, this produces no observable performance benefit, but for most cases with flattish terrain, it's an improvement.
It can likely be further improved, but further performance improvements are outside the scope of this commit and will likely result in more complexity increases.
typically this is a state that only lasts for a tick or so, but it's a race condition that is regardless very commonly encountered.
If you were very unlucky, you might have noticed grass randomly dying when you were spawning or flying around, even though it was in full sky light.
opcache preloading doesn't store non-class constants, but it does store class constants. Class constants that reference non-class constants are pre-resolved into values before storing in opcache SHM, so class constants are OK to use, but non-class constants will come back as undefined.
this was degraded whenever it was I decided to make chunks always be allocated. This commit uses a fast path for light filling in subchunks which are completely clear of the heightmap, which returns the performance back to its old fast levels.
running composer update on 7.4 will generate a lock file using the newest dependencies which work for the current PHP version, which usually isn't desirable for a project like this where developers might be using newer PHP versions than users.
running composer update on 7.4 will generate a lock file using the newest dependencies which work for the current PHP version, which usually isn't desirable for a project like this where developers might be using newer PHP versions than users.
This commit fixes the 5+ years-old bug with the movement anti-cheat that everyone has complained about: sprinting on stairs causes rubberbanding.
This commit addresses this problem at long last, along with a handful of precursor commits that were necessary to fix this problem:
- dac76f0e0f14d9beae3e55491ab9f61353db1b68
- 89fe8f7f10716fed6193646984a7e2d28f6f6ce5
- 2d77b1e3649d11a6072fbd1dbf88574b6ebf1af3
Additionally, these changes now allow the anti-cheat to be accurate to at least 0.001 of a block, perhaps even better. I didn't commit a change to the threshold here, but it was instrumental to pinning down the exact nature of these bugs.
This closes#1475, at long last.
this fixes bugs where the entity would jump in the air when walking on blocks like carpet. It also fixes a lot of the issues with stepping in the anti-cheat, allowing to reduce the error tolerance on movement processing.
this was causing the movement anti-cheat to shit itself after the first movement because it used setPosition() on the player if the position wasn't exactly perfect (which obviously it never is perfect, because of fp rounding errors).
