Cave Generator

Additions / Changes:

• Structure spawning is now ready for general use.
  • Cave Generator now includes a fairly decent way to spawn small structures (roughly 16x16 or less). Structures are regular .nbt files created with structure blocks that can be configured to automatically spawn on the ceilings and floors of caves.
  • Structures should not spawn above ground.
    • Although, they will sometimes spawn underwater. Still working on this.
  • Structures will only spawn on ceilings and floors, but
    • They can be offset (x, y, z); and,
    • Relative spawn positions can be tested to be solid or non-solid.
  • Regardless of their original configuration, structures are always spawned around their centers (x and z only).
  • The following parameters are supported:
    • name: either a resource location or file name.
    • integrity: the 0 - 1 number of blocks that will be retained when spawning.
    • offset: a group of three numbers, (x, y, z), that will determine the structure's spawn position relative to the surface found.
    • offsetX: a single number representing the x-coordinate offset.
    • offsetY
    • offsetZ
    • matchers: a list of source blocks that must be found (i.e. the surface must be one of these blocks).
    • frequency: the number of tries per chunk. 
    • chance: the percent chance that each try will be successful (before locating a surface).
    • minHeight
    • maxHeight
    • airMatchers: a list of relative coordinates which need to be non-solid blocks in order for the structure to spawn.
    • solidMatchers: a list of relative coordinates which need to be solid blocks.
    • debugSpawns: a flag used for debugging spawns. Reveals the location of each spawn in the log.
    • rotateRandomly
  • This feature is ideal for users looking to spawn just a few basic decorations and ensure that they do not get placed outside of caves. Larger and more complicated structures should ideally be handled by another mod, such as Recurrent Complex or OTG. 
• Caverns are now manually sealed off below oceans. Cave Generator will make sure that ocean floors consist of water > one layer of gravel below > at least one layer of stone below that.
• Large stalactites and stalagmites now have a field for matchers; surfaces can be matched with specific blockstates.
• Minor optimizations to blockFillers.
• Updated vanilla.json to include all new features and default values.
• Minor adjustments to formatting in vanilla.json.
• Added giant mushrooms to underground_forest.json.
• Gravel and coarse dirt no longer spawn according to noise values in underground_forest.json. Could be faster.