Block Corruption

Lots of minor changes, and some major ones as well. Some of these changes are listed below:

Corrupted zones (after becoming deactivated when a player moves too far away) can now become re-activated if a player comes nearby. Corruption points spawn naturally now. Corruption points now spread towards a player more often. Less CPU usage due to corruption point exclusion. Blocks placed by a player are now immune to corruption (as are certain important blocks such as end portal frames). Added block validation in many areas to ensure sanity. And more!™

Blocks placed by a player being immune to corruption is achieved by spawning a third (new) kind of invisible entity. The entity lasts for 51 seconds (1024 ticks).

Fabric mod with 2 custom entities (neither of which are rendered at all) and 1 custom block. Flickering is done with display entities. This version is a bit slow due to the large numbers of entities being processed each tick.

Corruption points do not spawn naturally, and must be summoned with: /execute positioned ~ ~-1 ~ align xyz run summon corruption:corruption_point ~ ~ ~